diff options
Diffstat (limited to 'target/linux/generic-2.6/patches/000-reinstate-devfs.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches/000-reinstate-devfs.patch | 12377 |
1 files changed, 12377 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches/000-reinstate-devfs.patch b/target/linux/generic-2.6/patches/000-reinstate-devfs.patch new file mode 100644 index 0000000000..aff55a98ac --- /dev/null +++ b/target/linux/generic-2.6/patches/000-reinstate-devfs.patch @@ -0,0 +1,12377 @@ +diff -urN linux-2.6.19.old/arch/cris/arch-v10/kernel/debugport.c linux-2.6.19.dev/arch/cris/arch-v10/kernel/debugport.c +--- linux-2.6.19.old/arch/cris/arch-v10/kernel/debugport.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/cris/arch-v10/kernel/debugport.c 2006-12-14 03:12:59.000000000 +0100 +@@ -540,7 +540,7 @@ + dummy_driver.init_termios = tty_std_termios; + dummy_driver.init_termios.c_cflag = + B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ +- dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + + dummy_driver.open = dummy_open; + dummy_driver.close = dummy_close; +diff -urN linux-2.6.19.old/arch/cris/arch-v32/kernel/debugport.c linux-2.6.19.dev/arch/cris/arch-v32/kernel/debugport.c +--- linux-2.6.19.old/arch/cris/arch-v32/kernel/debugport.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/cris/arch-v32/kernel/debugport.c 2006-12-14 03:12:59.000000000 +0100 +@@ -352,7 +352,7 @@ + dummy_driver.init_termios = tty_std_termios; + dummy_driver.init_termios.c_cflag = + B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ +- dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + + dummy_driver.open = dummy_open; + dummy_driver.close = dummy_close; +diff -urN linux-2.6.19.old/arch/i386/kernel/microcode.c linux-2.6.19.dev/arch/i386/kernel/microcode.c +--- linux-2.6.19.old/arch/i386/kernel/microcode.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/i386/kernel/microcode.c 2006-12-14 03:12:59.000000000 +0100 +@@ -460,6 +460,7 @@ + static struct miscdevice microcode_dev = { + .minor = MICROCODE_MINOR, + .name = "microcode", ++ .devfs_name = "cpu/microcode", + .fops = µcode_fops, + }; + +diff -urN linux-2.6.19.old/arch/ppc/4xx_io/serial_sicc.c linux-2.6.19.dev/arch/ppc/4xx_io/serial_sicc.c +--- linux-2.6.19.old/arch/ppc/4xx_io/serial_sicc.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/ppc/4xx_io/serial_sicc.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1757,7 +1757,7 @@ + siccnormal_driver->subtype = SERIAL_TYPE_NORMAL; + siccnormal_driver->init_termios = tty_std_termios; + siccnormal_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; +- siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + tty_set_operations(siccnormal_driver, &sicc_ops); + + if (tty_register_driver(siccnormal_driver)) +diff -urN linux-2.6.19.old/arch/sparc64/solaris/socksys.c linux-2.6.19.dev/arch/sparc64/solaris/socksys.c +--- linux-2.6.19.old/arch/sparc64/solaris/socksys.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/sparc64/solaris/socksys.c 2006-12-14 03:12:59.000000000 +0100 +@@ -26,6 +26,7 @@ + #include <linux/slab.h> + #include <linux/syscalls.h> + #include <linux/in.h> ++#include <linux/devfs_fs_kernel.h> + + #include <net/sock.h> + +@@ -188,6 +189,8 @@ + return ret; + } + ++ devfs_mk_cdev(MKDEV(30, 0), S_IFCHR|S_IRUSR|S_IWUSR, "socksys"); ++ + file = fcheck(ret); + /* N.B. Is this valid? Suppose the f_ops are in a module ... */ + socksys_file_ops = *file->f_op; +@@ -202,4 +205,5 @@ + { + if (unregister_chrdev(30, "socksys")) + printk ("Couldn't unregister socksys character device\n"); ++ devfs_remove ("socksys"); + } +diff -urN linux-2.6.19.old/arch/um/drivers/line.c linux-2.6.19.dev/arch/um/drivers/line.c +--- linux-2.6.19.old/arch/um/drivers/line.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/um/drivers/line.c 2006-12-14 03:12:59.000000000 +0100 +@@ -8,6 +8,7 @@ + #include "linux/list.h" + #include "linux/kd.h" + #include "linux/interrupt.h" ++#include "linux/devfs_fs_kernel.h" + #include "asm/uaccess.h" + #include "chan_kern.h" + #include "irq_user.h" +@@ -653,6 +654,7 @@ + + driver->driver_name = line_driver->name; + driver->name = line_driver->device_name; ++ driver->devfs_name = line_driver->devfs_name; + driver->major = line_driver->major; + driver->minor_start = line_driver->minor_start; + driver->type = line_driver->type; +diff -urN linux-2.6.19.old/arch/um/drivers/ssl.c linux-2.6.19.dev/arch/um/drivers/ssl.c +--- linux-2.6.19.old/arch/um/drivers/ssl.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/um/drivers/ssl.c 2006-12-14 03:12:59.000000000 +0100 +@@ -53,6 +53,7 @@ + static struct line_driver driver = { + .name = "UML serial line", + .device_name = "ttyS", ++ .devfs_name = "tts/", + .major = TTY_MAJOR, + .minor_start = 64, + .type = TTY_DRIVER_TYPE_SERIAL, +diff -urN linux-2.6.19.old/arch/um/drivers/stdio_console.c linux-2.6.19.dev/arch/um/drivers/stdio_console.c +--- linux-2.6.19.old/arch/um/drivers/stdio_console.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/um/drivers/stdio_console.c 2006-12-14 03:12:59.000000000 +0100 +@@ -59,6 +59,7 @@ + static struct line_driver driver = { + .name = "UML console", + .device_name = "tty", ++ .devfs_name = "vc/", + .major = TTY_MAJOR, + .minor_start = 0, + .type = TTY_DRIVER_TYPE_CONSOLE, +diff -urN linux-2.6.19.old/arch/um/drivers/ubd_kern.c linux-2.6.19.dev/arch/um/drivers/ubd_kern.c +--- linux-2.6.19.old/arch/um/drivers/ubd_kern.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/um/drivers/ubd_kern.c 2006-12-14 03:12:59.000000000 +0100 +@@ -24,6 +24,7 @@ + #include "linux/blkdev.h" + #include "linux/hdreg.h" + #include "linux/init.h" ++#include "linux/devfs_fs_kernel.h" + #include "linux/cdrom.h" + #include "linux/proc_fs.h" + #include "linux/ctype.h" +@@ -645,10 +646,14 @@ + disk->first_minor = unit << UBD_SHIFT; + disk->fops = &ubd_blops; + set_capacity(disk, size / 512); +- if(major == MAJOR_NR) ++ if(major == MAJOR_NR){ + sprintf(disk->disk_name, "ubd%c", 'a' + unit); +- else ++ sprintf(disk->devfs_name, "ubd/disc%d", unit); ++ } ++ else { + sprintf(disk->disk_name, "ubd_fake%d", unit); ++ sprintf(disk->devfs_name, "ubd_fake/disc%d", unit); ++ } + + /* sysfs register (not for ide fake devices) */ + if (major == MAJOR_NR) { +@@ -853,6 +864,7 @@ + { + int i; + ++ devfs_mk_dir("ubd"); + if (register_blkdev(MAJOR_NR, "ubd")) + return -1; + +@@ -866,6 +878,7 @@ + char name[sizeof("ubd_nnn\0")]; + + snprintf(name, sizeof(name), "ubd_%d", fake_major); ++ devfs_mk_dir(name); + if (register_blkdev(fake_major, "ubd")) + return -1; + } +diff -urN linux-2.6.19.old/arch/um/include/line.h linux-2.6.19.dev/arch/um/include/line.h +--- linux-2.6.19.old/arch/um/include/line.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/arch/um/include/line.h 2006-12-14 03:12:59.000000000 +0100 +@@ -17,6 +17,7 @@ + struct line_driver { + char *name; + char *device_name; ++ char *devfs_name; + short major; + short minor_start; + short type; +diff -urN linux-2.6.19.old/Documentation/Changes linux-2.6.19.dev/Documentation/Changes +--- linux-2.6.19.old/Documentation/Changes 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/Changes 2006-12-14 03:12:59.000000000 +0100 +@@ -180,8 +180,8 @@ + -------------------- + + A driver has been added to allow updating of Intel IA32 microcode, +-accessible as a normal (misc) character device. If you are not using +-udev you may need to: ++accessible as both a devfs regular file and as a normal (misc) ++character device. If you are not using devfs you may need to: + + mkdir /dev/cpu + mknod /dev/cpu/microcode c 10 184 +@@ -200,9 +200,7 @@ + udev + ---- + udev is a userspace application for populating /dev dynamically with +-only entries for devices actually present. udev replaces the basic +-functionality of devfs, while allowing persistant device naming for +-devices. ++only entries for devices actually present. udev replaces devfs. + + FUSE + ---- +@@ -232,13 +230,18 @@ + enable it to operate over diverse media layers. If you use PPP, + upgrade pppd to at least 2.4.0. + +-If you are not using udev, you must have the device file /dev/ppp ++If you are not using devfs, you must have the device file /dev/ppp + which can be made by: + + mknod /dev/ppp c 108 0 + + as root. + ++If you use devfsd and build ppp support as modules, you will need ++the following in your /etc/devfsd.conf file: ++ ++LOOKUP PPP MODLOAD ++ + Isdn4k-utils + ------------ + +diff -urN linux-2.6.19.old/Documentation/DocBook/kernel-api.tmpl linux-2.6.19.dev/Documentation/DocBook/kernel-api.tmpl +--- linux-2.6.19.old/Documentation/DocBook/kernel-api.tmpl 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/DocBook/kernel-api.tmpl 2006-12-14 03:12:59.000000000 +0100 +@@ -84,6 +84,9 @@ + !Ekernel/rcupdate.c + </sect1> + ++ <chapter id="devfs"> ++ <title>The Device File System</title> ++!Efs/devfs/base.c + </chapter> + + <chapter id="adt"> +diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/boot-options linux-2.6.19.dev/Documentation/filesystems/devfs/boot-options +--- linux-2.6.19.old/Documentation/filesystems/devfs/boot-options 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/filesystems/devfs/boot-options 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,65 @@ ++/* -*- auto-fill -*- */ ++ ++ Device File System (devfs) Boot Options ++ ++ Richard Gooch <rgooch@atnf.csiro.au> ++ ++ 18-AUG-2001 ++ ++ ++When CONFIG_DEVFS_DEBUG is enabled, you can pass several boot options ++to the kernel to debug devfs. The boot options are prefixed by ++"devfs=", and are separated by commas. Spaces are not allowed. The ++syntax looks like this: ++ ++devfs=<option1>,<option2>,<option3> ++ ++and so on. For example, if you wanted to turn on debugging for module ++load requests and device registration, you would do: ++ ++devfs=dmod,dreg ++ ++You may prefix "no" to any option. This will invert the option. ++ ++ ++Debugging Options ++================= ++ ++These requires CONFIG_DEVFS_DEBUG to be enabled. ++Note that all debugging options have 'd' as the first character. By ++default all options are off. All debugging output is sent to the ++kernel logs. The debugging options do not take effect until the devfs ++version message appears (just prior to the root filesystem being ++mounted). ++ ++These are the options: ++ ++dmod print module load requests to <request_module> ++ ++dreg print device register requests to <devfs_register> ++ ++dunreg print device unregister requests to <devfs_unregister> ++ ++dchange print device change requests to <devfs_set_flags> ++ ++dilookup print inode lookup requests ++ ++diget print VFS inode allocations ++ ++diunlink print inode unlinks ++ ++dichange print inode changes ++ ++dimknod print calls to mknod(2) ++ ++dall some debugging turned on ++ ++ ++Other Options ++============= ++ ++These control the default behaviour of devfs. The options are: ++ ++mount mount devfs onto /dev at boot time ++ ++only disable non-devfs device nodes for devfs-capable drivers +diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/ChangeLog linux-2.6.19.dev/Documentation/filesystems/devfs/ChangeLog +--- linux-2.6.19.old/Documentation/filesystems/devfs/ChangeLog 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/filesystems/devfs/ChangeLog 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,1977 @@ ++/* -*- auto-fill -*- */ ++=============================================================================== ++Changes for patch v1 ++ ++- creation of devfs ++ ++- modified miscellaneous character devices to support devfs ++=============================================================================== ++Changes for patch v2 ++ ++- bug fix with manual inode creation ++=============================================================================== ++Changes for patch v3 ++ ++- bugfixes ++ ++- documentation improvements ++ ++- created a couple of scripts (one to save&restore a devfs and the ++ other to set up compatibility symlinks) ++ ++- devfs support for SCSI discs. New name format is: sd_hHcCiIlL ++=============================================================================== ++Changes for patch v4 ++ ++- bugfix for the directory reading code ++ ++- bugfix for compilation with kerneld ++ ++- devfs support for generic hard discs ++ ++- rationalisation of the various watchdog drivers ++=============================================================================== ++Changes for patch v5 ++ ++- support for mounting directly from entries in the devfs (it doesn't ++ need to be mounted to do this), including the root filesystem. ++ Mounting of swap partitions also works. Hence, now if you set ++ CONFIG_DEVFS_ONLY to 'Y' then you won't be able to access your discs ++ via ordinary device nodes. Naturally, the default is 'N' so that you ++ can still use your old device nodes. If you want to mount from devfs ++ entries, make sure you use: append = "root=/dev/sd_..." in your ++ lilo.conf. It seems LILO looks for the device number (major&minor) ++ and writes that into the kernel image :-( ++ ++- support for character memory devices (/dev/null, /dev/zero, /dev/full ++ and so on). Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++=============================================================================== ++Changes for patch v6 ++ ++- support for subdirectories ++ ++- support for symbolic links (created by devfs_mk_symlink(), no ++ support yet for creation via symlink(2)) ++ ++- SCSI disc naming now cast in stone, with the format: ++ /dev/sd/c0b1t2u3 controller=0, bus=1, ID=2, LUN=3, whole disc ++ /dev/sd/c0b1t2u3p4 controller=0, bus=1, ID=2, LUN=3, 4th partition ++ ++- loop devices now appear in devfs ++ ++- tty devices, console, serial ports, etc. now appear in devfs ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- bugs with mounting devfs-only devices now fixed ++=============================================================================== ++Changes for patch v7 ++ ++- SCSI CD-ROMS, tapes and generic devices now appear in devfs ++=============================================================================== ++Changes for patch v8 ++ ++- bugfix with no-rewind SCSI tapes ++ ++- RAMDISCs now appear in devfs ++ ++- better cleaning up of devfs entries created by various modules ++ ++- interface change to <devfs_register> ++=============================================================================== ++Changes for patch v9 ++ ++- the v8 patch was corrupted somehow, which would affect the patch for ++ linux/fs/filesystems.c ++ I've also fixed the v8 patch file on the WWW ++ ++- MetaDevices (/dev/md*) should now appear in devfs ++=============================================================================== ++Changes for patch v10 ++ ++- bugfix in meta device support for devfs ++ ++- created this ChangeLog file ++ ++- added devfs support to the floppy driver ++ ++- added support for creating sockets in a devfs ++=============================================================================== ++Changes for patch v11 ++ ++- added DEVFS_FL_HIDE_UNREG flag ++ ++- incorporated better patch for ttyname() in libc 5.4.43 from H.J. Lu. ++ ++- interface change to <devfs_mk_symlink> ++ ++- support for creating symlinks with symlink(2) ++ ++- parallel port printer (/dev/lp*) now appears in devfs ++=============================================================================== ++Changes for patch v12 ++ ++- added inode check to <devfs_fill_file> function ++ ++- improved devfs support when mounting from devfs ++ ++- added call to <<release>> operation when removing swap areas on ++ devfs devices ++ ++- increased NR_SUPER to 128 to support large numbers of devfs mounts ++ (for chroot(2) gaols) ++ ++- fixed bug in SCSI disc support: was generating incorrect minors if ++ SCSI ID's did not start at 0 and increase by 1 ++ ++- support symlink traversal when mounting root ++=============================================================================== ++Changes for patch v13 ++ ++- added devfs support to soundcard driver ++ Thanks to Eric Dumas <dumas@linux.eu.org> and ++ C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- added devfs support to the joystick driver ++ ++- loop driver now has it's own subdirectory "/dev/loop/" ++ ++- created <devfs_get_flags> and <devfs_set_flags> functions ++ ++- fix problem with SCSI disc compatibility names (sd{a,b,c,d,e,f}) ++ which assumes ID's start at 0 and increase by 1. Also only create ++ devfs entries for SCSI disc partitions which actually exist ++ Show new names in partition check ++ Thanks to Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz> ++=============================================================================== ++Changes for patch v14 ++ ++- bug fix in floppy driver: would not compile without ++ CONFIG_DEVFS_FS='Y' ++ Thanks to Jurgen Botz <jbotz@nova.botz.org> ++ ++- bug fix in loop driver ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- do not create devfs entries for printers not configured ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- do not create devfs entries for serial ports not present ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- ensure <tty_register_devfs> is exported from tty_io.c ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- allow unregistering of devfs symlink entries ++ ++- fixed bug in SCSI disc naming introduced in last patch version ++=============================================================================== ++Changes for patch v15 ++ ++- ported to kernel 2.1.81 ++=============================================================================== ++Changes for patch v16 ++ ++- created <devfs_set_symlink_destination> function ++ ++- moved DEVFS_SUPER_MAGIC into header file ++ ++- added DEVFS_FL_HIDE flag ++ ++- created <devfs_get_maj_min> ++ ++- created <devfs_get_handle_from_inode> ++ ++- fixed bugs in searching by major&minor ++ ++- changed interface to <devfs_unregister>, <devfs_fill_file> and ++ <devfs_find_handle> ++ ++- fixed inode times when symlink created with symlink(2) ++ ++- change tty driver to do auto-creation of devfs entries ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to ++ devfs ++ ++- updated libc 5.4.43 patch for ttyname() ++=============================================================================== ++Changes for patch v17 ++ ++- added CONFIG_DEVFS_TTY_COMPAT ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- bugfix in devfs support for drivers/char/lp.c ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- clean up serial driver so that PCMCIA devices unregister correctly ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to ++ devfs [was missing in patch v16] ++ ++- updated libc 5.4.43 patch for ttyname() [was missing in patch v16] ++ ++- all SCSI devices now registered in /dev/sg ++ ++- support removal of devfs entries via unlink(2) ++=============================================================================== ++Changes for patch v18 ++ ++- added floppy/?u720 floppy entry ++ ++- fixed kerneld support for entries in devfs subdirectories ++ ++- incorporated latest patch for ttyname() in libc 5.4.43 from H.J. Lu. ++=============================================================================== ++Changes for patch v19 ++ ++- bug fix when looking up unregistered entries: kerneld was not called ++ ++- fixes for kernel 2.1.86 (now requires 2.1.86) ++=============================================================================== ++Changes for patch v20 ++ ++- only create available floppy entries ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- new IDE naming scheme following SCSI format (i.e. /dev/id/c0b0t0u0p1 ++ instead of /dev/hda1) ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- new XT disc naming scheme following SCSI format (i.e. /dev/xd/c0t0p1 ++ instead of /dev/xda1) ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- new non-standard CD-ROM names (i.e. /dev/sbp/c#t#) ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- allow symlink traversal when mounting the root filesystem ++ ++- Create entries for MD devices at MD init ++ Thanks to Christophe Leroy <christophe.leroy5@capway.com> ++=============================================================================== ++Changes for patch v21 ++ ++- ported to kernel 2.1.91 ++=============================================================================== ++Changes for patch v22 ++ ++- SCSI host number patch ("scsihosts=" kernel option) ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++=============================================================================== ++Changes for patch v23 ++ ++- Fixed persistence bug with device numbers for manually created ++ device files ++ ++- Fixed problem with recreating symlinks with different content ++ ++- Added CONFIG_DEVFS_MOUNT (mount devfs on /dev at boot time) ++=============================================================================== ++Changes for patch v24 ++ ++- Switched from CONFIG_KERNELD to CONFIG_KMOD: module autoloading ++ should now work again ++ ++- Hide entries which are manually unlinked ++ ++- Always invalidate devfs dentry cache when registering entries ++ ++- Support removal of devfs directories via rmdir(2) ++ ++- Ensure directories created by <devfs_mk_dir> are visible ++ ++- Default no access for "other" for floppy device ++=============================================================================== ++Changes for patch v25 ++ ++- Updates to CREDITS file and minor IDE numbering change ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- Invalidate devfs dentry cache when making directories ++ ++- Invalidate devfs dentry cache when removing entries ++ ++- More informative message if root FS mount fails when devfs ++ configured ++ ++- Fixed persistence bug with fifos ++=============================================================================== ++Changes for patch v26 ++ ++- ported to kernel 2.1.97 ++ ++- Changed serial directory from "/dev/serial" to "/dev/tts" and ++ "/dev/consoles" to "/dev/vc" to be more friendly to new procps ++=============================================================================== ++Changes for patch v27 ++ ++- Added support for IDE4 and IDE5 ++ Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl> ++ ++- Documented "scsihosts=" boot parameter ++ ++- Print process command when debugging kerneld/kmod ++ ++- Added debugging for register/unregister/change operations ++ ++- Added "devfs=" boot options ++ ++- Hide unregistered entries by default ++=============================================================================== ++Changes for patch v28 ++ ++- No longer lock/unlock superblock in <devfs_put_super> (cope with ++ recent VFS interface change) ++ ++- Do not automatically change ownership/protection of /dev/tty ++ ++- Drop negative dentries when they are released ++ ++- Manage dcache more efficiently ++=============================================================================== ++Changes for patch v29 ++ ++- Added DEVFS_FL_AUTO_DEVNUM flag ++=============================================================================== ++Changes for patch v30 ++ ++- No longer set unnecessary methods ++ ++- Ported to kernel 2.1.99-pre3 ++=============================================================================== ++Changes for patch v31 ++ ++- Added PID display to <call_kerneld> debugging message ++ ++- Added "diread" and "diwrite" options ++ ++- Ported to kernel 2.1.102 ++ ++- Fixed persistence problem with permissions ++=============================================================================== ++Changes for patch v32 ++ ++- Fixed devfs support in drivers/block/md.c ++=============================================================================== ++Changes for patch v33 ++ ++- Support legacy device nodes ++ ++- Fixed bug where recreated inodes were hidden ++ ++- New IDE naming scheme: everything is under /dev/ide ++=============================================================================== ++Changes for patch v34 ++ ++- Improved debugging in <get_vfs_inode> ++ ++- Prevent duplicate calls to <devfs_mk_dir> in SCSI layer ++ ++- No longer free old dentries in <devfs_mk_dir> ++ ++- Free all dentries for a given entry when deleting inodes ++=============================================================================== ++Changes for patch v35 ++ ++- Ported to kernel 2.1.105 (sound driver changes) ++=============================================================================== ++Changes for patch v36 ++ ++- Fixed sound driver port ++=============================================================================== ++Changes for patch v37 ++ ++- Minor documentation tweaks ++=============================================================================== ++Changes for patch v38 ++ ++- More documentation tweaks ++ ++- Fix for sound driver port ++ ++- Removed ttyname-patch (grab libc 5.4.44 instead) ++ ++- Ported to kernel 2.1.107-pre2 (loop driver fix) ++=============================================================================== ++Changes for patch v39 ++ ++- Ported to kernel 2.1.107 (hd.c hunk broke due to spelling "fixes"). Sigh ++ ++- Removed many #ifdef's, replaced with trickery in include/devfs_fs.h ++=============================================================================== ++Changes for patch v40 ++ ++- Fix for sound driver port ++ ++- Limit auto-device numbering to majors 128 to 239 ++=============================================================================== ++Changes for patch v41 ++ ++- Fixed inode times persistence problem ++=============================================================================== ++Changes for patch v42 ++ ++- Ported to kernel 2.1.108 (drivers/scsi/hosts.c hunk broke) ++=============================================================================== ++Changes for patch v43 ++ ++- Fixed spelling in <devfs_readlink> debug ++ ++- Fixed bug in <devfs_setup> parsing "dilookup" ++ ++- More #ifdef's removed ++ ++- Supported Sparc keyboard (/dev/kbd) ++ ++- Supported DSP56001 digital signal processor (/dev/dsp56k) ++ ++- Supported Apple Desktop Bus (/dev/adb) ++ ++- Supported Coda network file system (/dev/cfs*) ++=============================================================================== ++Changes for patch v44 ++ ++- Fixed devfs inode leak when manually recreating inodes ++ ++- Fixed permission persistence problem when recreating inodes ++=============================================================================== ++Changes for patch v45 ++ ++- Ported to kernel 2.1.110 ++=============================================================================== ++Changes for patch v46 ++ ++- Ported to kernel 2.1.112-pre1 ++ ++- Removed harmless "unused variable" compiler warning ++ ++- Fixed modes for manually recreated device nodes ++=============================================================================== ++Changes for patch v47 ++ ++- Added NULL devfs inode warning in <devfs_read_inode> ++ ++- Force all inode nlink values to 1 ++=============================================================================== ++Changes for patch v48 ++ ++- Added "dimknod" option ++ ++- Set inode nlink to 0 when freeing dentries ++ ++- Added support for virtual console capture devices (/dev/vcs*) ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Fixed modes for manually recreated symlinks ++=============================================================================== ++Changes for patch v49 ++ ++- Ported to kernel 2.1.113 ++=============================================================================== ++Changes for patch v50 ++ ++- Fixed bugs in recreated directories and symlinks ++=============================================================================== ++Changes for patch v51 ++ ++- Improved robustness of rc.devfs script ++ Thanks to Roderich Schupp <rsch@experteam.de> ++ ++- Fixed bugs in recreated device nodes ++ ++- Fixed bug in currently unused <devfs_get_handle_from_inode> ++ ++- Defined new <devfs_handle_t> type ++ ++- Improved debugging when getting entries ++ ++- Fixed bug where directories could be emptied ++ ++- Ported to kernel 2.1.115 ++=============================================================================== ++Changes for patch v52 ++ ++- Replaced dummy .epoch inode with .devfsd character device ++ ++- Modified rc.devfs to take account of above change ++ ++- Removed spurious driver warning messages when CONFIG_DEVFS_FS=n ++ ++- Implemented devfsd protocol revision 0 ++=============================================================================== ++Changes for patch v53 ++ ++- Ported to kernel 2.1.116 (kmod change broke hunk) ++ ++- Updated Documentation/Configure.help ++ ++- Test and tty pattern patch for rc.devfs script ++ Thanks to Roderich Schupp <rsch@experteam.de> ++ ++- Added soothing message to warning in <devfs_d_iput> ++=============================================================================== ++Changes for patch v54 ++ ++- Ported to kernel 2.1.117 ++ ++- Fixed default permissions in sound driver ++ ++- Added support for frame buffer devices (/dev/fb*) ++=============================================================================== ++Changes for patch v55 ++ ++- Ported to kernel 2.1.119 ++ ++- Use GCC extensions for structure initialisations ++ ++- Implemented async open notification ++ ++- Incremented devfsd protocol revision to 1 ++=============================================================================== ++Changes for patch v56 ++ ++- Ported to kernel 2.1.120-pre3 ++ ++- Moved async open notification to end of <devfs_open> ++=============================================================================== ++Changes for patch v57 ++ ++- Ported to kernel 2.1.121 ++ ++- Prepended "/dev/" to module load request ++ ++- Renamed <call_kerneld> to <call_kmod> ++ ++- Created sample modules.conf file ++=============================================================================== ++Changes for patch v58 ++ ++- Fixed typo "AYSNC" -> "ASYNC" ++=============================================================================== ++Changes for patch v59 ++ ++- Added open flag for files ++=============================================================================== ++Changes for patch v60 ++ ++- Ported to kernel 2.1.123-pre2 ++=============================================================================== ++Changes for patch v61 ++ ++- Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode> ++=============================================================================== ++Changes for patch v62 ++ ++- Ported to kernel 2.1.123 ++=============================================================================== ++Changes for patch v63 ++ ++- Ported to kernel 2.1.124-pre2 ++=============================================================================== ++Changes for patch v64 ++ ++- Fixed Unix98 pty support ++ ++- Increased buffer size in <get_partition_list> to avoid crash and ++ burn ++=============================================================================== ++Changes for patch v65 ++ ++- More Unix98 pty support fixes ++ ++- Added test for empty <<name>> in <devfs_find_handle> ++ ++- Renamed <generate_path> to <devfs_generate_path> and published ++ ++- Created /dev/root symlink ++ Thanks to Roderich Schupp <rsch@ExperTeam.de> ++ with further modifications by me ++=============================================================================== ++Changes for patch v66 ++ ++- Yet more Unix98 pty support fixes (now tested) ++ ++- Created <devfs_get_fops> ++ ++- Support media change checks when CONFIG_DEVFS_ONLY=y ++ ++- Abolished Unix98-style PTY names for old PTY devices ++=============================================================================== ++Changes for patch v67 ++ ++- Added inline declaration for dummy <devfs_generate_path> ++ ++- Removed spurious "unable to register... in devfs" messages when ++ CONFIG_DEVFS_FS=n ++ ++- Fixed misc. devices when CONFIG_DEVFS_FS=n ++ ++- Limit auto-device numbering to majors 144 to 239 ++=============================================================================== ++Changes for patch v68 ++ ++- Hide unopened virtual consoles from directory listings ++ ++- Added support for video capture devices ++ ++- Ported to kernel 2.1.125 ++=============================================================================== ++Changes for patch v69 ++ ++- Fix for CONFIG_VT=n ++=============================================================================== ++Changes for patch v70 ++ ++- Added support for non-OSS/Free sound cards ++=============================================================================== ++Changes for patch v71 ++ ++- Ported to kernel 2.1.126-pre2 ++=============================================================================== ++Changes for patch v72 ++ ++- #ifdef's for CONFIG_DEVFS_DISABLE_OLD_NAMES removed ++=============================================================================== ++Changes for patch v73 ++ ++- CONFIG_DEVFS_DISABLE_OLD_NAMES replaced with "nocompat" boot option ++ ++- CONFIG_DEVFS_BOOT_OPTIONS removed: boot options always available ++=============================================================================== ++Changes for patch v74 ++ ++- Removed CONFIG_DEVFS_MOUNT and "mount" boot option and replaced with ++ "nomount" boot option ++ ++- Documentation updates ++ ++- Updated sample modules.conf ++=============================================================================== ++Changes for patch v75 ++ ++- Updated sample modules.conf ++ ++- Remount devfs after initrd finishes ++ ++- Ported to kernel 2.1.127 ++ ++- Added support for ISDN ++ Thanks to Christophe Leroy <christophe.leroy5@capway.com> ++=============================================================================== ++Changes for patch v76 ++ ++- Updated an email address in ChangeLog ++ ++- CONFIG_DEVFS_ONLY replaced with "only" boot option ++=============================================================================== ++Changes for patch v77 ++ ++- Added DEVFS_FL_REMOVABLE flag ++ ++- Check for disc change when listing directories with removable media ++ devices ++ ++- Use DEVFS_FL_REMOVABLE in sd.c ++ ++- Ported to kernel 2.1.128 ++=============================================================================== ++Changes for patch v78 ++ ++- Only call <scan_dir_for_removable> on first call to <devfs_readdir> ++ ++- Ported to kernel 2.1.129-pre5 ++ ++- ISDN support improvements ++ Thanks to Christophe Leroy <christophe.leroy5@capway.com> ++=============================================================================== ++Changes for patch v79 ++ ++- Ported to kernel 2.1.130 ++ ++- Renamed miscdevice "apm" to "apm_bios" to be consistent with ++ devices.txt ++=============================================================================== ++Changes for patch v80 ++ ++- Ported to kernel 2.1.131 ++ ++- Updated <devfs_rmdir> for VFS change in 2.1.131 ++=============================================================================== ++Changes for patch v81 ++ ++- Fixed permissions on /dev/ptmx ++=============================================================================== ++Changes for patch v82 ++ ++- Ported to kernel 2.1.132-pre4 ++ ++- Changed initial permissions on /dev/pts/* ++ ++- Created <devfs_mk_compat> ++ ++- Added "symlinks" boot option ++ ++- Changed devfs_register_blkdev() back to register_blkdev() for IDE ++ ++- Check for partitions on removable media in <devfs_lookup> ++=============================================================================== ++Changes for patch v83 ++ ++- Fixed support for ramdisc when using string-based root FS name ++ ++- Ported to kernel 2.2.0-pre1 ++=============================================================================== ++Changes for patch v84 ++ ++- Ported to kernel 2.2.0-pre7 ++=============================================================================== ++Changes for patch v85 ++ ++- Compile fixes for driver/sound/sound_common.c (non-module) and ++ drivers/isdn/isdn_common.c ++ Thanks to Christophe Leroy <christophe.leroy5@capway.com> ++ ++- Added support for registering regular files ++ ++- Created <devfs_set_file_size> ++ ++- Added /dev/cpu/mtrr as an alternative interface to /proc/mtrr ++ ++- Update devfs inodes from entries if not changed through FS ++=============================================================================== ++Changes for patch v86 ++ ++- Ported to kernel 2.2.0-pre9 ++=============================================================================== ++Changes for patch v87 ++ ++- Fixed bug when mounting non-devfs devices in a devfs ++=============================================================================== ++Changes for patch v88 ++ ++- Fixed <devfs_fill_file> to only initialise temporary inodes ++ ++- Trap for NULL fops in <devfs_register> ++ ++- Return -ENODEV in <devfs_fill_file> for non-driver inodes ++ ++- Fixed bug when unswapping non-devfs devices in a devfs ++=============================================================================== ++Changes for patch v89 ++ ++- Switched to C data types in include/linux/devfs_fs.h ++ ++- Switched from PATH_MAX to DEVFS_PATHLEN ++ ++- Updated Documentation/filesystems/devfs/modules.conf to take account ++ of reverse scanning (!) by modprobe ++ ++- Ported to kernel 2.2.0 ++=============================================================================== ++Changes for patch v90 ++ ++- CONFIG_DEVFS_DISABLE_OLD_TTY_NAMES replaced with "nottycompat" boot ++ option ++ ++- CONFIG_DEVFS_TTY_COMPAT removed: existing "symlinks" boot option now ++ controls this. This means you must have libc 5.4.44 or later, or a ++ recent version of libc 6 if you use the "symlinks" option ++=============================================================================== ++Changes for patch v91 ++ ++- Switch from <devfs_mk_symlink> to <devfs_mk_compat> in ++ drivers/char/vc_screen.c to fix problems with Midnight Commander ++=============================================================================== ++Changes for patch v92 ++ ++- Ported to kernel 2.2.2-pre5 ++=============================================================================== ++Changes for patch v93 ++ ++- Modified <sd_name> in drivers/scsi/sd.c to cope with devices that ++ don't exist (which happens with new RAID autostart code printk()s) ++=============================================================================== ++Changes for patch v94 ++ ++- Fixed bug in joystick driver: only first joystick was registered ++=============================================================================== ++Changes for patch v95 ++ ++- Fixed another bug in joystick driver ++ ++- Fixed <devfsd_read> to not overrun event buffer ++=============================================================================== ++Changes for patch v96 ++ ++- Ported to kernel 2.2.5-2 ++ ++- Created <devfs_auto_unregister> ++ ++- Fixed bugs: compatibility entries were not unregistered for: ++ loop driver ++ floppy driver ++ RAMDISC driver ++ IDE tape driver ++ SCSI CD-ROM driver ++ SCSI HDD driver ++=============================================================================== ++Changes for patch v97 ++ ++- Fixed bugs: compatibility entries were not unregistered for: ++ ALSA sound driver ++ partitions in generic disc driver ++ ++- Don't return unregistred entries in <devfs_find_handle> ++ ++- Panic in <devfs_unregister> if entry unregistered ++ ++- Don't panic in <devfs_auto_unregister> for duplicates ++=============================================================================== ++Changes for patch v98 ++ ++- Don't unregister already unregistered entries in <unregister> ++ ++- Register entry in <sd_detect> ++ ++- Unregister entry in <sd_detach> ++ ++- Changed to <devfs_*register_chrdev> in drivers/char/tty_io.c ++ ++- Ported to kernel 2.2.7 ++=============================================================================== ++Changes for patch v99 ++ ++- Ported to kernel 2.2.8 ++ ++- Fixed bug in drivers/scsi/sd.c when >16 SCSI discs ++ ++- Disable warning messages when unable to read partition table for ++ removable media ++=============================================================================== ++Changes for patch v100 ++ ++- Ported to kernel 2.3.1-pre5 ++ ++- Added "oops-on-panic" boot option ++ ++- Improved debugging in <devfs_register> and <devfs_unregister> ++ ++- Register entry in <sr_detect> ++ ++- Unregister entry in <sr_detach> ++ ++- Register entry in <sg_detect> ++ ++- Unregister entry in <sg_detach> ++ ++- Added support for ALSA drivers ++=============================================================================== ++Changes for patch v101 ++ ++- Ported to kernel 2.3.2 ++=============================================================================== ++Changes for patch v102 ++ ++- Update serial driver to register PCMCIA entries ++ Thanks to Roch-Alexandre Nomine-Beguin <roch@samarkand.infini.fr> ++ ++- Updated an email address in ChangeLog ++ ++- Hide virtual console capture entries from directory listings when ++ corresponding console device is not open ++=============================================================================== ++Changes for patch v103 ++ ++- Ported to kernel 2.3.3 ++=============================================================================== ++Changes for patch v104 ++ ++- Added documentation for some functions ++ ++- Added "doc" target to fs/devfs/Makefile ++ ++- Added "v4l" directory for video4linux devices ++ ++- Replaced call to <devfs_unregister> in <sd_detach> with call to ++ <devfs_register_partitions> ++ ++- Moved registration for sr and sg drivers from detect() to attach() ++ methods ++ ++- Register entries in <st_attach> and unregister in <st_detach> ++ ++- Work around IDE driver treating CD-ROM as gendisk ++ ++- Use <sed> instead of <tr> in rc.devfs ++ ++- Updated ToDo list ++ ++- Removed "oops-on-panic" boot option: now always Oops ++=============================================================================== ++Changes for patch v105 ++ ++- Unregister SCSI host from <scsi_host_no_list> in <scsi_unregister> ++ Thanks to Zoltán Böszörményi <zboszor@mail.externet.hu> ++ ++- Don't save /dev/log in rc.devfs ++ ++- Ported to kernel 2.3.4-pre1 ++=============================================================================== ++Changes for patch v106 ++ ++- Fixed silly typo in drivers/scsi/st.c ++ ++- Improved debugging in <devfs_register> ++=============================================================================== ++Changes for patch v107 ++ ++- Added "diunlink" and "nokmod" boot options ++ ++- Removed superfluous warning message in <devfs_d_iput> ++=============================================================================== ++Changes for patch v108 ++ ++- Remove entries when unloading sound module ++=============================================================================== ++Changes for patch v109 ++ ++- Ported to kernel 2.3.6-pre2 ++=============================================================================== ++Changes for patch v110 ++ ++- Took account of change to <d_alloc_root> ++=============================================================================== ++Changes for patch v111 ++ ++- Created separate event queue for each mounted devfs ++ ++- Removed <devfs_invalidate_dcache> ++ ++- Created new ioctl()s for devfsd ++ ++- Incremented devfsd protocol revision to 3 ++ ++- Fixed bug when re-creating directories: contents were lost ++ ++- Block access to inodes until devfsd updates permissions ++=============================================================================== ++Changes for patch v112 ++ ++- Modified patch so it applies against 2.3.5 and 2.3.6 ++ ++- Updated an email address in ChangeLog ++ ++- Do not automatically change ownership/protection of /dev/tty<n> ++ ++- Updated sample modules.conf ++ ++- Switched to sending process uid/gid to devfsd ++ ++- Renamed <call_kmod> to <try_modload> ++ ++- Added DEVFSD_NOTIFY_LOOKUP event ++ ++- Added DEVFSD_NOTIFY_CHANGE event ++ ++- Added DEVFSD_NOTIFY_CREATE event ++ ++- Incremented devfsd protocol revision to 4 ++ ++- Moved kernel-specific stuff to include/linux/devfs_fs_kernel.h ++=============================================================================== ++Changes for patch v113 ++ ++- Ported to kernel 2.3.9 ++ ++- Restricted permissions on some block devices ++=============================================================================== ++Changes for patch v114 ++ ++- Added support for /dev/netlink ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Return EISDIR rather than EINVAL for read(2) on directories ++ ++- Ported to kernel 2.3.10 ++=============================================================================== ++Changes for patch v115 ++ ++- Added support for all remaining character devices ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Cleaned up netlink support ++=============================================================================== ++Changes for patch v116 ++ ++- Added support for /dev/parport%d ++ Thanks to Tim Waugh <tim@cyberelk.demon.co.uk> ++ ++- Fixed parallel port ATAPI tape driver ++ ++- Fixed Atari SLM laser printer driver ++=============================================================================== ++Changes for patch v117 ++ ++- Added support for COSA card ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Fixed drivers/char/ppdev.c: missing #include <linux/init.h> ++ ++- Fixed drivers/char/ftape/zftape/zftape-init.c ++ Thanks to Vladimir Popov <mashgrad@usa.net> ++=============================================================================== ++Changes for patch v118 ++ ++- Ported to kernel 2.3.15-pre3 ++ ++- Fixed bug in loop driver ++ ++- Unregister /dev/lp%d entries in drivers/char/lp.c ++ Thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl> ++=============================================================================== ++Changes for patch v119 ++ ++- Ported to kernel 2.3.16 ++=============================================================================== ++Changes for patch v120 ++ ++- Fixed bug in drivers/scsi/scsi.c ++ ++- Added /dev/ppp ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Ported to kernel 2.3.17 ++=============================================================================== ++Changes for patch v121 ++ ++- Fixed bug in drivers/block/loop.c ++ ++- Ported to kernel 2.3.18 ++=============================================================================== ++Changes for patch v122 ++ ++- Ported to kernel 2.3.19 ++=============================================================================== ++Changes for patch v123 ++ ++- Ported to kernel 2.3.20 ++=============================================================================== ++Changes for patch v124 ++ ++- Ported to kernel 2.3.21 ++=============================================================================== ++Changes for patch v125 ++ ++- Created <devfs_get_info>, <devfs_set_info>, ++ <devfs_get_first_child> and <devfs_get_next_sibling> ++ Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>, ++ <devfs_mk_dir> and <devfs_find_handle> ++ Work sponsored by SGI ++ ++- Fixed apparent bug in COSA driver ++ ++- Re-instated "scsihosts=" boot option ++=============================================================================== ++Changes for patch v126 ++ ++- Always create /dev/pts if CONFIG_UNIX98_PTYS=y ++ ++- Fixed call to <devfs_mk_dir> in drivers/block/ide-disk.c ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Allow multiple unregistrations ++ ++- Created /dev/scsi hierarchy ++ Work sponsored by SGI ++=============================================================================== ++Changes for patch v127 ++ ++Work sponsored by SGI ++ ++- No longer disable devpts if devfs enabled (caveat emptor) ++ ++- Added flags array to struct gendisk and removed code from ++ drivers/scsi/sd.c ++ ++- Created /dev/discs hierarchy ++=============================================================================== ++Changes for patch v128 ++ ++Work sponsored by SGI ++ ++- Created /dev/cdroms hierarchy ++=============================================================================== ++Changes for patch v129 ++ ++Work sponsored by SGI ++ ++- Removed compatibility entries for sound devices ++ ++- Removed compatibility entries for printer devices ++ ++- Removed compatibility entries for video4linux devices ++ ++- Removed compatibility entries for parallel port devices ++ ++- Removed compatibility entries for frame buffer devices ++=============================================================================== ++Changes for patch v130 ++ ++Work sponsored by SGI ++ ++- Added major and minor number to devfsd protocol ++ ++- Incremented devfsd protocol revision to 5 ++ ++- Removed compatibility entries for SoundBlaster CD-ROMs ++ ++- Removed compatibility entries for netlink devices ++ ++- Removed compatibility entries for SCSI generic devices ++ ++- Removed compatibility entries for SCSI tape devices ++=============================================================================== ++Changes for patch v131 ++ ++Work sponsored by SGI ++ ++- Support info pointer for all devfs entry types ++ ++- Added <<info>> parameter to <devfs_mk_dir> and <devfs_mk_symlink> ++ ++- Removed /dev/st hierarchy ++ ++- Removed /dev/sg hierarchy ++ ++- Removed compatibility entries for loop devices ++ ++- Removed compatibility entries for IDE tape devices ++ ++- Removed compatibility entries for SCSI CD-ROMs ++ ++- Removed /dev/sr hierarchy ++=============================================================================== ++Changes for patch v132 ++ ++Work sponsored by SGI ++ ++- Removed compatibility entries for floppy devices ++ ++- Removed compatibility entries for RAMDISCs ++ ++- Removed compatibility entries for meta-devices ++ ++- Removed compatibility entries for SCSI discs ++ ++- Created <devfs_make_root> ++ ++- Removed /dev/sd hierarchy ++ ++- Support "../" when searching devfs namespace ++ ++- Created /dev/ide/host* hierarchy ++ ++- Supported IDE hard discs in /dev/ide/host* hierarchy ++ ++- Removed compatibility entries for IDE discs ++ ++- Removed /dev/ide/hd hierarchy ++ ++- Supported IDE CD-ROMs in /dev/ide/host* hierarchy ++ ++- Removed compatibility entries for IDE CD-ROMs ++ ++- Removed /dev/ide/cd hierarchy ++=============================================================================== ++Changes for patch v133 ++ ++Work sponsored by SGI ++ ++- Created <devfs_get_unregister_slave> ++ ++- Fixed bug in fs/partitions/check.c when rescanning ++=============================================================================== ++Changes for patch v134 ++ ++Work sponsored by SGI ++ ++- Removed /dev/sd, /dev/sr, /dev/st and /dev/sg directories ++ ++- Removed /dev/ide/hd directory ++ ++- Exported <devfs_get_parent> ++ ++- Created <devfs_register_tape> and /dev/tapes hierarchy ++ ++- Removed /dev/ide/mt hierarchy ++ ++- Removed /dev/ide/fd hierarchy ++ ++- Ported to kernel 2.3.25 ++=============================================================================== ++Changes for patch v135 ++ ++Work sponsored by SGI ++ ++- Removed compatibility entries for virtual console capture devices ++ ++- Removed unused <devfs_set_symlink_destination> ++ ++- Removed compatibility entries for serial devices ++ ++- Removed compatibility entries for console devices ++ ++- Do not hide entries from devfsd or children ++ ++- Removed DEVFS_FL_TTY_COMPAT flag ++ ++- Removed "nottycompat" boot option ++ ++- Removed <devfs_mk_compat> ++=============================================================================== ++Changes for patch v136 ++ ++Work sponsored by SGI ++ ++- Moved BSD pty devices to /dev/pty ++ ++- Added DEVFS_FL_WAIT flag ++=============================================================================== ++Changes for patch v137 ++ ++Work sponsored by SGI ++ ++- Really fixed bug in fs/partitions/check.c when rescanning ++ ++- Support new "disc" naming scheme in <get_removable_partition> ++ ++- Allow NULL fops in <devfs_register> ++ ++- Removed redundant name functions in SCSI disc and IDE drivers ++=============================================================================== ++Changes for patch v138 ++ ++Work sponsored by SGI ++ ++- Fixed old bugs in drivers/block/paride/pt.c, drivers/char/tpqic02.c, ++ drivers/net/wan/cosa.c and drivers/scsi/scsi.c ++ Thanks to Sergey Kubushin <ksi@ksi-linux.com> ++ ++- Fall back to major table if NULL fops given to <devfs_register> ++=============================================================================== ++Changes for patch v139 ++ ++Work sponsored by SGI ++ ++- Corrected and moved <get_blkfops> and <get_chrfops> declarations ++ from arch/alpha/kernel/osf_sys.c to include/linux/fs.h ++ ++- Removed name function from struct gendisk ++ ++- Updated devfs FAQ ++=============================================================================== ++Changes for patch v140 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.27 ++=============================================================================== ++Changes for patch v141 ++ ++Work sponsored by SGI ++ ++- Bug fix in arch/m68k/atari/joystick.c ++ ++- Moved ISDN and capi devices to /dev/isdn ++=============================================================================== ++Changes for patch v142 ++ ++Work sponsored by SGI ++ ++- Bug fix in drivers/block/ide-probe.c (patch confusion) ++=============================================================================== ++Changes for patch v143 ++ ++Work sponsored by SGI ++ ++- Bug fix in drivers/block/blkpg.c:partition_name() ++=============================================================================== ++Changes for patch v144 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.29 ++ ++- Removed calls to <devfs_register> from cdu31a, cm206, mcd and mcdx ++ CD-ROM drivers: generic driver handles this now ++ ++- Moved joystick devices to /dev/joysticks ++=============================================================================== ++Changes for patch v145 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.30-pre3 ++ ++- Register whole-disc entry even for invalid partition tables ++ ++- Fixed bug in mounting root FS when initrd enabled ++ ++- Fixed device entry leak with IDE CD-ROMs ++ ++- Fixed compile problem with drivers/isdn/isdn_common.c ++ ++- Moved COSA devices to /dev/cosa ++ ++- Support fifos when unregistering ++ ++- Created <devfs_register_series> and used in many drivers ++ ++- Moved Coda devices to /dev/coda ++ ++- Moved parallel port IDE tapes to /dev/pt ++ ++- Moved parallel port IDE generic devices to /dev/pg ++=============================================================================== ++Changes for patch v146 ++ ++Work sponsored by SGI ++ ++- Removed obsolete DEVFS_FL_COMPAT and DEVFS_FL_TOLERANT flags ++ ++- Fixed compile problem with fs/coda/psdev.c ++ ++- Reinstate change to <devfs_register_blkdev> in ++ drivers/block/ide-probe.c now that fs/isofs/inode.c is fixed ++ ++- Switched to <devfs_register_blkdev> in drivers/block/floppy.c, ++ drivers/scsi/sr.c and drivers/block/md.c ++ ++- Moved DAC960 devices to /dev/dac960 ++=============================================================================== ++Changes for patch v147 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.32-pre4 ++=============================================================================== ++Changes for patch v148 ++ ++Work sponsored by SGI ++ ++- Removed kmod support: use devfsd instead ++ ++- Moved miscellaneous character devices to /dev/misc ++=============================================================================== ++Changes for patch v149 ++ ++Work sponsored by SGI ++ ++- Ensure include/linux/joystick.h is OK for user-space ++ ++- Improved debugging in <get_vfs_inode> ++ ++- Ensure dentries created by devfsd will be cleaned up ++=============================================================================== ++Changes for patch v150 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.34 ++=============================================================================== ++Changes for patch v151 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.35-pre1 ++ ++- Created <devfs_get_name> ++=============================================================================== ++Changes for patch v152 ++ ++Work sponsored by SGI ++ ++- Updated sample modules.conf ++ ++- Ported to kernel 2.3.36-pre1 ++=============================================================================== ++Changes for patch v153 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.42 ++ ++- Removed <devfs_fill_file> ++=============================================================================== ++Changes for patch v154 ++ ++Work sponsored by SGI ++ ++- Took account of device number changes for /dev/fb* ++=============================================================================== ++Changes for patch v155 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.43-pre8 ++ ++- Moved /dev/tty0 to /dev/vc/0 ++ ++- Moved sequence number formatting from <_tty_make_name> to drivers ++=============================================================================== ++Changes for patch v156 ++ ++Work sponsored by SGI ++ ++- Fixed breakage in drivers/scsi/sd.c due to recent SCSI changes ++=============================================================================== ++Changes for patch v157 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.45 ++=============================================================================== ++Changes for patch v158 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.46-pre2 ++=============================================================================== ++Changes for patch v159 ++ ++Work sponsored by SGI ++ ++- Fixed drivers/block/md.c ++ Thanks to Mike Galbraith <mikeg@weiden.de> ++ ++- Documentation fixes ++ ++- Moved device registration from <lp_init> to <lp_register> ++ Thanks to Tim Waugh <twaugh@redhat.com> ++=============================================================================== ++Changes for patch v160 ++ ++Work sponsored by SGI ++ ++- Fixed drivers/char/joystick/joystick.c ++ Thanks to Vojtech Pavlik <vojtech@suse.cz> ++ ++- Documentation updates ++ ++- Fixed arch/i386/kernel/mtrr.c if procfs and devfs not enabled ++ ++- Fixed drivers/char/stallion.c ++=============================================================================== ++Changes for patch v161 ++ ++Work sponsored by SGI ++ ++- Remove /dev/ide when ide-mod is unloaded ++ ++- Fixed bug in drivers/block/ide-probe.c when secondary but no primary ++ ++- Added DEVFS_FL_NO_PERSISTENCE flag ++ ++- Used new DEVFS_FL_NO_PERSISTENCE flag for Unix98 pty slaves ++ ++- Removed unnecessary call to <update_devfs_inode_from_entry> in ++ <devfs_readdir> ++ ++- Only set auto-ownership for /dev/pty/s* ++=============================================================================== ++Changes for patch v162 ++ ++Work sponsored by SGI ++ ++- Set inode->i_size to correct size for symlinks ++ Thanks to Jeremy Fitzhardinge <jeremy@goop.org> ++ ++- Only give lookup() method to directories to comply with new VFS ++ assumptions ++ ++- Remove unnecessary tests in symlink methods ++ ++- Don't kill existing block ops in <devfs_read_inode> ++ ++- Restore auto-ownership for /dev/pty/m* ++=============================================================================== ++Changes for patch v163 ++ ++Work sponsored by SGI ++ ++- Don't create missing directories in <devfs_find_handle> ++ ++- Removed Documentation/filesystems/devfs/mk-devlinks ++ ++- Updated Documentation/filesystems/devfs/README ++=============================================================================== ++Changes for patch v164 ++ ++Work sponsored by SGI ++ ++- Fixed CONFIG_DEVFS breakage in drivers/char/serial.c introduced in ++ linux-2.3.99-pre6-7 ++=============================================================================== ++Changes for patch v165 ++ ++Work sponsored by SGI ++ ++- Ported to kernel 2.3.99-pre6 ++=============================================================================== ++Changes for patch v166 ++ ++Work sponsored by SGI ++ ++- Added CONFIG_DEVFS_MOUNT ++=============================================================================== ++Changes for patch v167 ++ ++Work sponsored by SGI ++ ++- Updated Documentation/filesystems/devfs/README ++ ++- Updated sample modules.conf ++=============================================================================== ++Changes for patch v168 ++ ++Work sponsored by SGI ++ ++- Disabled multi-mount capability (use VFS bindings instead) ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v169 ++ ++Work sponsored by SGI ++ ++- Removed multi-mount code ++ ++- Removed compatibility macros: VFS has changed too much ++=============================================================================== ++Changes for patch v170 ++ ++Work sponsored by SGI ++ ++- Updated README from master HTML file ++ ++- Merged devfs inode into devfs entry ++=============================================================================== ++Changes for patch v171 ++ ++Work sponsored by SGI ++ ++- Updated sample modules.conf ++ ++- Removed dead code in <devfs_register> which used to call ++ <free_dentries> ++ ++- Ported to kernel 2.4.0-test2-pre3 ++=============================================================================== ++Changes for patch v172 ++ ++Work sponsored by SGI ++ ++- Changed interface to <devfs_register> ++ ++- Changed interface to <devfs_register_series> ++=============================================================================== ++Changes for patch v173 ++ ++Work sponsored by SGI ++ ++- Simplified interface to <devfs_mk_symlink> ++ ++- Simplified interface to <devfs_mk_dir> ++ ++- Simplified interface to <devfs_find_handle> ++=============================================================================== ++Changes for patch v174 ++ ++Work sponsored by SGI ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v175 ++ ++Work sponsored by SGI ++ ++- DocBook update for fs/devfs/base.c ++ Thanks to Tim Waugh <twaugh@redhat.com> ++ ++- Removed stale fs/tunnel.c (was never used or completed) ++=============================================================================== ++Changes for patch v176 ++ ++Work sponsored by SGI ++ ++- Updated ToDo list ++ ++- Removed sample modules.conf: now distributed with devfsd ++ ++- Updated README from master HTML file ++ ++- Ported to kernel 2.4.0-test3-pre4 (which had devfs-patch-v174) ++=============================================================================== ++Changes for patch v177 ++ ++- Updated README from master HTML file ++ ++- Documentation cleanups ++ ++- Ensure <devfs_generate_path> terminates string for root entry ++ Thanks to Tim Jansen <tim@tjansen.de> ++ ++- Exported <devfs_get_name> to modules ++ ++- Make <devfs_mk_symlink> send events to devfsd ++ ++- Cleaned up option processing in <devfs_setup> ++ ++- Fixed bugs in handling symlinks: could leak or cause Oops ++ ++- Cleaned up directory handling by separating fops ++ Thanks to Alexander Viro <viro@parcelfarce.linux.theplanet.co.uk> ++=============================================================================== ++Changes for patch v178 ++ ++- Fixed handling of inverted options in <devfs_setup> ++=============================================================================== ++Changes for patch v179 ++ ++- Adjusted <try_modload> to account for <devfs_generate_path> fix ++=============================================================================== ++Changes for patch v180 ++ ++- Fixed !CONFIG_DEVFS_FS stub declaration of <devfs_get_info> ++=============================================================================== ++Changes for patch v181 ++ ++- Answered question posed by Al Viro and removed his comments from <devfs_open> ++ ++- Moved setting of registered flag after other fields are changed ++ ++- Fixed race between <devfsd_close> and <devfsd_notify_one> ++ ++- Global VFS changes added bogus BKL to devfsd_close(): removed ++ ++- Widened locking in <devfs_readlink> and <devfs_follow_link> ++ ++- Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc ++ ++- Simplified locking in <devfsd_ioctl> and fixed memory leak ++=============================================================================== ++Changes for patch v182 ++ ++- Created <devfs_*alloc_major> and <devfs_*alloc_devnum> ++ ++- Removed broken devnum allocation and use <devfs_alloc_devnum> ++ ++- Fixed old devnum leak by calling new <devfs_dealloc_devnum> ++ ++- Created <devfs_*alloc_unique_number> ++ ++- Fixed number leak for /dev/cdroms/cdrom%d ++ ++- Fixed number leak for /dev/discs/disc%d ++=============================================================================== ++Changes for patch v183 ++ ++- Fixed bug in <devfs_setup> which could hang boot process ++=============================================================================== ++Changes for patch v184 ++ ++- Documentation typo fix for fs/devfs/util.c ++ ++- Fixed drivers/char/stallion.c for devfs ++ ++- Added DEVFSD_NOTIFY_DELETE event ++ ++- Updated README from master HTML file ++ ++- Removed #include <asm/segment.h> from fs/devfs/base.c ++=============================================================================== ++Changes for patch v185 ++ ++- Made <block_semaphore> and <char_semaphore> in fs/devfs/util.c ++ private ++ ++- Fixed inode table races by removing it and using inode->u.generic_ip ++ instead ++ ++- Moved <devfs_read_inode> into <get_vfs_inode> ++ ++- Moved <devfs_write_inode> into <devfs_notify_change> ++=============================================================================== ++Changes for patch v186 ++ ++- Fixed race in <devfs_do_symlink> for uni-processor ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v187 ++ ++- Fixed drivers/char/stallion.c for devfs ++ ++- Fixed drivers/char/rocket.c for devfs ++ ++- Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers ++=============================================================================== ++Changes for patch v188 ++ ++- Updated major masks in fs/devfs/util.c up to Linus' "no new majors" ++ proclamation. Block: were 126 now 122 free, char: were 26 now 19 free ++ ++- Updated README from master HTML file ++ ++- Removed remnant of multi-mount support in <devfs_mknod> ++ ++- Removed unused DEVFS_FL_SHOW_UNREG flag ++=============================================================================== ++Changes for patch v189 ++ ++- Removed nlink field from struct devfs_inode ++ ++- Removed auto-ownership for /dev/pty/* (BSD ptys) and used ++ DEVFS_FL_CURRENT_OWNER|DEVFS_FL_NO_PERSISTENCE for /dev/pty/s* (just ++ like Unix98 pty slaves) and made /dev/pty/m* rw-rw-rw- access ++=============================================================================== ++Changes for patch v190 ++ ++- Updated README from master HTML file ++ ++- Replaced BKL with global rwsem to protect symlink data (quick and ++ dirty hack) ++=============================================================================== ++Changes for patch v191 ++ ++- Replaced global rwsem for symlink with per-link refcount ++=============================================================================== ++Changes for patch v192 ++ ++- Removed unnecessary #ifdef CONFIG_DEVFS_FS from arch/i386/kernel/mtrr.c ++ ++- Ported to kernel 2.4.10-pre11 ++ ++- Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode> ++=============================================================================== ++Changes for patch v193 ++ ++- Went back to global rwsem for symlinks (refcount scheme no good) ++=============================================================================== ++Changes for patch v194 ++ ++- Fixed overrun in <devfs_link> by removing function (not needed) ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v195 ++ ++- Fixed buffer underrun in <try_modload> ++ ++- Moved down_read() from <search_for_entry_in_dir> to <find_entry> ++=============================================================================== ++Changes for patch v196 ++ ++- Fixed race in <devfsd_ioctl> when setting event mask ++ Thanks to Kari Hurtta <hurtta@leija.mh.fmi.fi> ++ ++- Avoid deadlock in <devfs_follow_link> by using temporary buffer ++=============================================================================== ++Changes for patch v197 ++ ++- First release of new locking code for devfs core (v1.0) ++ ++- Fixed bug in drivers/cdrom/cdrom.c ++=============================================================================== ++Changes for patch v198 ++ ++- Discard temporary buffer, now use "%s" for dentry names ++ ++- Don't generate path in <try_modload>: use fake entry instead ++ ++- Use "existing" directory in <_devfs_make_parent_for_leaf> ++ ++- Use slab cache rather than fixed buffer for devfsd events ++=============================================================================== ++Changes for patch v199 ++ ++- Removed obsolete usage of DEVFS_FL_NO_PERSISTENCE ++ ++- Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir> ++ ++- Fixed locking bug in <devfs_d_revalidate_wait> due to typo ++ ++- Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from devfsd ++ or children ++=============================================================================== ++Changes for patch v200 ++ ++- Ported to kernel 2.5.1-pre2 ++=============================================================================== ++Changes for patch v201 ++ ++- Fixed bug in <devfsd_read>: was dereferencing freed pointer ++=============================================================================== ++Changes for patch v202 ++ ++- Fixed bug in <devfsd_close>: was dereferencing freed pointer ++ ++- Added process group check for devfsd privileges ++=============================================================================== ++Changes for patch v203 ++ ++- Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete> ++=============================================================================== ++Changes for patch v204 ++ ++- Removed long obsolete rc.devfs ++ ++- Return old entry in <devfs_mk_dir> for 2.4.x kernels ++ ++- Updated README from master HTML file ++ ++- Increment refcount on module in <check_disc_changed> ++ ++- Created <devfs_get_handle> and exported <devfs_put> ++ ++- Increment refcount on module in <devfs_get_ops> ++ ++- Created <devfs_put_ops> and used where needed to fix races ++ ++- Added clarifying comments in response to preliminary EMC code review ++ ++- Added poisoning to <devfs_put> ++ ++- Improved debugging messages ++ ++- Fixed unregister bugs in drivers/md/lvm-fs.c ++=============================================================================== ++Changes for patch v205 ++ ++- Corrected (made useful) debugging message in <unregister> ++ ++- Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs> ++ ++- Fixed drivers/md/lvm-fs.c to create "lvm" entry ++ ++- Added magic number to guard against scribbling drivers ++ ++- Only return old entry in <devfs_mk_dir> if a directory ++ ++- Defined macros for error and debug messages ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v206 ++ ++- Added support for multiple Compaq cpqarray controllers ++ ++- Fixed (rare, old) race in <devfs_lookup> ++=============================================================================== ++Changes for patch v207 ++ ++- Fixed deadlock bug in <devfs_d_revalidate_wait> ++ ++- Tag VFS deletable in <devfs_mk_symlink> if handle ignored ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v208 ++ ++- Added KERN_* to remaining messages ++ ++- Cleaned up declaration of <stat_read> ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v209 ++ ++- Updated README from master HTML file ++ ++- Removed silently introduced calls to lock_kernel() and ++ unlock_kernel() due to recent VFS locking changes. BKL isn't ++ required in devfs ++ ++- Changed <devfs_rmdir> to allow later additions if not yet empty ++ ++- Added calls to <devfs_register_partitions> in drivers/block/blkpc.c ++ <add_partition> and <del_partition> ++ ++- Fixed bug in <devfs_alloc_unique_number>: was clearing beyond ++ bitfield ++ ++- Fixed bitfield data type for <devfs_*alloc_devnum> ++ ++- Made major bitfield type and initialiser 64 bit safe ++=============================================================================== ++Changes for patch v210 ++ ++- Updated fs/devfs/util.c to fix shift warning on 64 bit machines ++ Thanks to Anton Blanchard <anton@samba.org> ++ ++- Updated README from master HTML file ++=============================================================================== ++Changes for patch v211 ++ ++- Do not put miscellaneous character devices in /dev/misc if they ++ specify their own directory (i.e. contain a '/' character) ++ ++- Copied macro for error messages from fs/devfs/base.c to ++ fs/devfs/util.c and made use of this macro ++ ++- Removed 2.4.x compatibility code from fs/devfs/base.c ++=============================================================================== ++Changes for patch v212 ++ ++- Added BKL to <devfs_open> because drivers still need it ++=============================================================================== ++Changes for patch v213 ++ ++- Protected <scan_dir_for_removable> and <get_removable_partition> ++ from changing directory contents ++=============================================================================== ++Changes for patch v214 ++ ++- Switched to ISO C structure field initialisers ++ ++- Switch to set_current_state() and move before add_wait_queue() ++ ++- Updated README from master HTML file ++ ++- Fixed devfs entry leak in <devfs_readdir> when *readdir fails ++=============================================================================== ++Changes for patch v215 ++ ++- Created <devfs_find_and_unregister> ++ ++- Switched many functions from <devfs_find_handle> to ++ <devfs_find_and_unregister> ++ ++- Switched many functions from <devfs_find_handle> to <devfs_get_handle> ++=============================================================================== ++Changes for patch v216 ++ ++- Switched arch/ia64/sn/io/hcl.c from <devfs_find_handle> to ++ <devfs_get_handle> ++ ++- Removed deprecated <devfs_find_handle> ++=============================================================================== ++Changes for patch v217 ++ ++- Exported <devfs_find_and_unregister> and <devfs_only> to modules ++ ++- Updated README from master HTML file ++ ++- Fixed module unload race in <devfs_open> ++=============================================================================== ++Changes for patch v218 ++ ++- Removed DEVFS_FL_AUTO_OWNER flag ++ ++- Switched lingering structure field initialiser to ISO C ++ ++- Added locking when setting/clearing flags ++ ++- Documentation fix in fs/devfs/util.c +diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/README linux-2.6.19.dev/Documentation/filesystems/devfs/README +--- linux-2.6.19.old/Documentation/filesystems/devfs/README 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/filesystems/devfs/README 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,1959 @@ ++Devfs (Device File System) FAQ ++ ++ ++Linux Devfs (Device File System) FAQ ++Richard Gooch ++20-AUG-2002 ++ ++ ++Document languages: ++ ++ ++ ++ ++ ++ ++ ++----------------------------------------------------------------------------- ++ ++NOTE: the master copy of this document is available online at: ++ ++http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html ++and looks much better than the text version distributed with the ++kernel sources. A mirror site is available at: ++ ++http://www.ras.ucalgary.ca/~rgooch/linux/docs/devfs.html ++ ++There is also an optional daemon that may be used with devfs. You can ++find out more about it at: ++ ++http://www.atnf.csiro.au/~rgooch/linux/ ++ ++A mailing list is available which you may subscribe to. Send ++email ++to majordomo@oss.sgi.com with the following line in the ++body of the message: ++subscribe devfs ++To unsubscribe, send the message body: ++unsubscribe devfs ++instead. The list is archived at ++ ++http://oss.sgi.com/projects/devfs/archive/. ++ ++----------------------------------------------------------------------------- ++ ++Contents ++ ++ ++What is it? ++ ++Why do it? ++ ++Who else does it? ++ ++How it works ++ ++Operational issues (essential reading) ++ ++Instructions for the impatient ++Permissions persistence across reboots ++Dealing with drivers without devfs support ++All the way with Devfs ++Other Issues ++Kernel Naming Scheme ++Devfsd Naming Scheme ++Old Compatibility Names ++SCSI Host Probing Issues ++ ++ ++ ++Device drivers currently ported ++ ++Allocation of Device Numbers ++ ++Questions and Answers ++ ++Making things work ++Alternatives to devfs ++What I don't like about devfs ++How to report bugs ++Strange kernel messages ++Compilation problems with devfsd ++ ++ ++Other resources ++ ++Translations of this document ++ ++ ++----------------------------------------------------------------------------- ++ ++ ++What is it? ++ ++Devfs is an alternative to "real" character and block special devices ++on your root filesystem. Kernel device drivers can register devices by ++name rather than major and minor numbers. These devices will appear in ++devfs automatically, with whatever default ownership and ++protection the driver specified. A daemon (devfsd) can be used to ++override these defaults. Devfs has been in the kernel since 2.3.46. ++ ++NOTE that devfs is entirely optional. If you prefer the old ++disc-based device nodes, then simply leave CONFIG_DEVFS_FS=n (the ++default). In this case, nothing will change. ALSO NOTE that if you do ++enable devfs, the defaults are such that full compatibility is ++maintained with the old devices names. ++ ++There are two aspects to devfs: one is the underlying device ++namespace, which is a namespace just like any mounted filesystem. The ++other aspect is the filesystem code which provides a view of the ++device namespace. The reason I make a distinction is because devfs ++can be mounted many times, with each mount showing the same device ++namespace. Changes made are global to all mounted devfs filesystems. ++Also, because the devfs namespace exists without any devfs mounts, you ++can easily mount the root filesystem by referring to an entry in the ++devfs namespace. ++ ++ ++The cost of devfs is a small increase in kernel code size and memory ++usage. About 7 pages of code (some of that in __init sections) and 72 ++bytes for each entry in the namespace. A modest system has only a ++couple of hundred device entries, so this costs a few more ++pages. Compare this with the suggestion to put /dev on a <a ++href="#why-faq-ramdisc">ramdisc. ++ ++On a typical machine, the cost is under 0.2 percent. On a modest ++system with 64 MBytes of RAM, the cost is under 0.1 percent. The ++accusations of "bloatware" levelled at devfs are not justified. ++ ++----------------------------------------------------------------------------- ++ ++ ++Why do it? ++ ++There are several problems that devfs addresses. Some of these ++problems are more serious than others (depending on your point of ++view), and some can be solved without devfs. However, the totality of ++these problems really calls out for devfs. ++ ++The choice is a patchwork of inefficient user space solutions, which ++are complex and likely to be fragile, or to use a simple and efficient ++devfs which is robust. ++ ++There have been many counter-proposals to devfs, all seeking to ++provide some of the benefits without actually implementing devfs. So ++far there has been an absence of code and no proposed alternative has ++been able to provide all the features that devfs does. Further, ++alternative proposals require far more complexity in user-space (and ++still deliver less functionality than devfs). Some people have the ++mantra of reducing "kernel bloat", but don't consider the effects on ++user-space. ++ ++A good solution limits the total complexity of kernel-space and ++user-space. ++ ++ ++Major&minor allocation ++ ++The existing scheme requires the allocation of major and minor device ++numbers for each and every device. This means that a central ++co-ordinating authority is required to issue these device numbers ++(unless you're developing a "private" device driver), in order to ++preserve uniqueness. Devfs shifts the burden to a namespace. This may ++not seem like a huge benefit, but actually it is. Since driver authors ++will naturally choose a device name which reflects the functionality ++of the device, there is far less potential for namespace conflict. ++Solving this requires a kernel change. ++ ++/dev management ++ ++Because you currently access devices through device nodes, these must ++be created by the system administrator. For standard devices you can ++usually find a MAKEDEV programme which creates all these (hundreds!) ++of nodes. This means that changes in the kernel must be reflected by ++changes in the MAKEDEV programme, or else the system administrator ++creates device nodes by hand. ++ ++The basic problem is that there are two separate databases of ++major and minor numbers. One is in the kernel and one is in /dev (or ++in a MAKEDEV programme, if you want to look at it that way). This is ++duplication of information, which is not good practice. ++Solving this requires a kernel change. ++ ++/dev growth ++ ++A typical /dev has over 1200 nodes! Most of these devices simply don't ++exist because the hardware is not available. A huge /dev increases the ++time to access devices (I'm just referring to the dentry lookup times ++and the time taken to read inodes off disc: the next subsection shows ++some more horrors). ++ ++An example of how big /dev can grow is if we consider SCSI devices: ++ ++host 6 bits (say up to 64 hosts on a really big machine) ++channel 4 bits (say up to 16 SCSI buses per host) ++id 4 bits ++lun 3 bits ++partition 6 bits ++TOTAL 23 bits ++ ++ ++This requires 8 Mega (1024*1024) inodes if we want to store all ++possible device nodes. Even if we scrap everything but id,partition ++and assume a single host adapter with a single SCSI bus and only one ++logical unit per SCSI target (id), that's still 10 bits or 1024 ++inodes. Each VFS inode takes around 256 bytes (kernel 2.1.78), so ++that's 256 kBytes of inode storage on disc (assuming real inodes take ++a similar amount of space as VFS inodes). This is actually not so bad, ++because disc is cheap these days. Embedded systems would care about ++256 kBytes of /dev inodes, but you could argue that embedded systems ++would have hand-tuned /dev directories. I've had to do just that on my ++embedded systems, but I would rather just leave it to devfs. ++ ++Another issue is the time taken to lookup an inode when first ++referenced. Not only does this take time in scanning through a list in ++memory, but also the seek times to read the inodes off disc. ++This could be solved in user-space using a clever programme which ++scanned the kernel logs and deleted /dev entries which are not ++available and created them when they were available. This programme ++would need to be run every time a new module was loaded, which would ++slow things down a lot. ++ ++There is an existing programme called scsidev which will automatically ++create device nodes for SCSI devices. It can do this by scanning files ++in /proc/scsi. Unfortunately, to extend this idea to other device ++nodes would require significant modifications to existing drivers (so ++they too would provide information in /proc). This is a non-trivial ++change (I should know: devfs has had to do something similar). Once ++you go to this much effort, you may as well use devfs itself (which ++also provides this information). Furthermore, such a system would ++likely be implemented in an ad-hoc fashion, as different drivers will ++provide their information in different ways. ++ ++Devfs is much cleaner, because it (naturally) has a uniform mechanism ++to provide this information: the device nodes themselves! ++ ++ ++Node to driver file_operations translation ++ ++There is an important difference between the way disc-based character ++and block nodes and devfs entries make the connection between an entry ++in /dev and the actual device driver. ++ ++With the current 8 bit major and minor numbers the connection between ++disc-based c&b nodes and per-major drivers is done through a ++fixed-length table of 128 entries. The various filesystem types set ++the inode operations for c&b nodes to {chr,blk}dev_inode_operations, ++so when a device is opened a few quick levels of indirection bring us ++to the driver file_operations. ++ ++For miscellaneous character devices a second step is required: there ++is a scan for the driver entry with the same minor number as the file ++that was opened, and the appropriate minor open method is called. This ++scanning is done *every time* you open a device node. Potentially, you ++may be searching through dozens of misc. entries before you find your ++open method. While not an enormous performance overhead, this does ++seem pointless. ++ ++Linux *must* move beyond the 8 bit major and minor barrier, ++somehow. If we simply increase each to 16 bits, then the indexing ++scheme used for major driver lookup becomes untenable, because the ++major tables (one each for character and block devices) would need to ++be 64 k entries long (512 kBytes on x86, 1 MByte for 64 bit ++systems). So we would have to use a scheme like that used for ++miscellaneous character devices, which means the search time goes up ++linearly with the average number of major device drivers on your ++system. Not all "devices" are hardware, some are higher-level drivers ++like KGI, so you can get more "devices" without adding hardware ++You can improve this by creating an ordered (balanced:-) ++binary tree, in which case your search time becomes log(N). ++Alternatively, you can use hashing to speed up the search. ++But why do that search at all if you don't have to? Once again, it ++seems pointless. ++ ++Note that devfs doesn't use the major&minor system. For devfs ++entries, the connection is done when you lookup the /dev entry. When ++devfs_register() is called, an internal table is appended which has ++the entry name and the file_operations. If the dentry cache doesn't ++have the /dev entry already, this internal table is scanned to get the ++file_operations, and an inode is created. If the dentry cache already ++has the entry, there is *no lookup time* (other than the dentry scan ++itself, but we can't avoid that anyway, and besides Linux dentries ++cream other OS's which don't have them:-). Furthermore, the number of ++node entries in a devfs is only the number of available device ++entries, not the number of *conceivable* entries. Even if you remove ++unnecessary entries in a disc-based /dev, the number of conceivable ++entries remains the same: you just limit yourself in order to save ++space. ++ ++Devfs provides a fast connection between a VFS node and the device ++driver, in a scalable way. ++ ++/dev as a system administration tool ++ ++Right now /dev contains a list of conceivable devices, most of which I ++don't have. Devfs only shows those devices available on my ++system. This means that listing /dev is a handy way of checking what ++devices are available. ++ ++Major&minor size ++ ++Existing major and minor numbers are limited to 8 bits each. This is ++now a limiting factor for some drivers, particularly the SCSI disc ++driver, which consumes a single major number. Only 16 discs are ++supported, and each disc may have only 15 partitions. Maybe this isn't ++a problem for you, but some of us are building huge Linux systems with ++disc arrays. With devfs an arbitrary pointer can be associated with ++each device entry, which can be used to give an effective 32 bit ++device identifier (i.e. that's like having a 32 bit minor ++number). Since this is private to the kernel, there are no C library ++compatibility issues which you would have with increasing major and ++minor number sizes. See the section on "Allocation of Device Numbers" ++for details on maintaining compatibility with userspace. ++ ++Solving this requires a kernel change. ++ ++Since writing this, the kernel has been modified so that the SCSI disc ++driver has more major numbers allocated to it and now supports up to ++128 discs. Since these major numbers are non-contiguous (a result of ++unplanned expansion), the implementation is a little more cumbersome ++than originally. ++ ++Just like the changes to IPv4 to fix impending limitations in the ++address space, people find ways around the limitations. In the long ++run, however, solutions like IPv6 or devfs can't be put off forever. ++ ++Read-only root filesystem ++ ++Having your device nodes on the root filesystem means that you can't ++operate properly with a read-only root filesystem. This is because you ++want to change ownerships and protections of tty devices. Existing ++practice prevents you using a CD-ROM as your root filesystem for a ++*real* system. Sure, you can boot off a CD-ROM, but you can't change ++tty ownerships, so it's only good for installing. ++ ++Also, you can't use a shared NFS root filesystem for a cluster of ++discless Linux machines (having tty ownerships changed on a common ++/dev is not good). Nor can you embed your root filesystem in a ++ROM-FS. ++ ++You can get around this by creating a RAMDISC at boot time, making ++an ext2 filesystem in it, mounting it somewhere and copying the ++contents of /dev into it, then unmounting it and mounting it over ++/dev. ++ ++A devfs is a cleaner way of solving this. ++ ++Non-Unix root filesystem ++ ++Non-Unix filesystems (such as NTFS) can't be used for a root ++filesystem because they variously don't support character and block ++special files or symbolic links. You can't have a separate disc-based ++or RAMDISC-based filesystem mounted on /dev because you need device ++nodes before you can mount these. Devfs can be mounted without any ++device nodes. Devlinks won't work because symlinks aren't supported. ++An alternative solution is to use initrd to mount a RAMDISC initial ++root filesystem (which is populated with a minimal set of device ++nodes), and then construct a new /dev in another RAMDISC, and finally ++switch to your non-Unix root filesystem. This requires clever boot ++scripts and a fragile and conceptually complex boot procedure. ++ ++Devfs solves this in a robust and conceptually simple way. ++ ++PTY security ++ ++Current pseudo-tty (pty) devices are owned by root and read-writable ++by everyone. The user of a pty-pair cannot change ++ownership/protections without being suid-root. ++ ++This could be solved with a secure user-space daemon which runs as ++root and does the actual creation of pty-pairs. Such a daemon would ++require modification to *every* programme that wants to use this new ++mechanism. It also slows down creation of pty-pairs. ++ ++An alternative is to create a new open_pty() syscall which does much ++the same thing as the user-space daemon. Once again, this requires ++modifications to pty-handling programmes. ++ ++The devfs solution allows a device driver to "tag" certain device ++files so that when an unopened device is opened, the ownerships are ++changed to the current euid and egid of the opening process, and the ++protections are changed to the default registered by the driver. When ++the device is closed ownership is set back to root and protections are ++set back to read-write for everybody. No programme need be changed. ++The devpts filesystem provides this auto-ownership feature for Unix98 ++ptys. It doesn't support old-style pty devices, nor does it have all ++the other features of devfs. ++ ++Intelligent device management ++ ++Devfs implements a simple yet powerful protocol for communication with ++a device management daemon (devfsd) which runs in user space. It is ++possible to send a message (either synchronously or asynchronously) to ++devfsd on any event, such as registration/unregistration of device ++entries, opening and closing devices, looking up inodes, scanning ++directories and more. This has many possibilities. Some of these are ++already implemented. See: ++ ++ ++http://www.atnf.csiro.au/~rgooch/linux/ ++ ++Device entry registration events can be used by devfsd to change ++permissions of newly-created device nodes. This is one mechanism to ++control device permissions. ++ ++Device entry registration/unregistration events can be used to run ++programmes or scripts. This can be used to provide automatic mounting ++of filesystems when a new block device media is inserted into the ++drive. ++ ++Asynchronous device open and close events can be used to implement ++clever permissions management. For example, the default permissions on ++/dev/dsp do not allow everybody to read from the device. This is ++sensible, as you don't want some remote user recording what you say at ++your console. However, the console user is also prevented from ++recording. This behaviour is not desirable. With asynchronous device ++open and close events, you can have devfsd run a programme or script ++when console devices are opened to change the ownerships for *other* ++device nodes (such as /dev/dsp). On closure, you can run a different ++script to restore permissions. An advantage of this scheme over ++modifying the C library tty handling is that this works even if your ++programme crashes (how many times have you seen the utmp database with ++lingering entries for non-existent logins?). ++ ++Synchronous device open events can be used to perform intelligent ++device access protections. Before the device driver open() method is ++called, the daemon must first validate the open attempt, by running an ++external programme or script. This is far more flexible than access ++control lists, as access can be determined on the basis of other ++system conditions instead of just the UID and GID. ++ ++Inode lookup events can be used to authenticate module autoload ++requests. Instead of using kmod directly, the event is sent to ++devfsd which can implement an arbitrary authentication before loading ++the module itself. ++ ++Inode lookup events can also be used to construct arbitrary ++namespaces, without having to resort to populating devfs with symlinks ++to devices that don't exist. ++ ++Speculative Device Scanning ++ ++Consider an application (like cdparanoia) that wants to find all ++CD-ROM devices on the system (SCSI, IDE and other types), whether or ++not their respective modules are loaded. The application must ++speculatively open certain device nodes (such as /dev/sr0 for the SCSI ++CD-ROMs) in order to make sure the module is loaded. This requires ++that all Linux distributions follow the standard device naming scheme ++(last time I looked RedHat did things differently). Devfs solves the ++naming problem. ++ ++The same application also wants to see which devices are actually ++available on the system. With the existing system it needs to read the ++/dev directory and speculatively open each /dev/sr* device to ++determine if the device exists or not. With a large /dev this is an ++inefficient operation, especially if there are many /dev/sr* nodes. A ++solution like scsidev could reduce the number of /dev/sr* entries (but ++of course that also requires all that inefficient directory scanning). ++ ++With devfs, the application can open the /dev/sr directory ++(which triggers the module autoloading if required), and proceed to ++read /dev/sr. Since only the available devices will have ++entries, there are no inefficencies in directory scanning or device ++openings. ++ ++----------------------------------------------------------------------------- ++ ++Who else does it? ++ ++FreeBSD has a devfs implementation. Solaris and AIX each have a ++pseudo-devfs (something akin to scsidev but for all devices, with some ++unspecified kernel support). BeOS, Plan9 and QNX also have it. SGI's ++IRIX 6.4 and above also have a device filesystem. ++ ++While we shouldn't just automatically do something because others do ++it, we should not ignore the work of others either. FreeBSD has a lot ++of competent people working on it, so their opinion should not be ++blithely ignored. ++ ++----------------------------------------------------------------------------- ++ ++ ++How it works ++ ++Registering device entries ++ ++For every entry (device node) in a devfs-based /dev a driver must call ++devfs_register(). This adds the name of the device entry, the ++file_operations structure pointer and a few other things to an ++internal table. Device entries may be added and removed at any ++time. When a device entry is registered, it automagically appears in ++any mounted devfs'. ++ ++Inode lookup ++ ++When a lookup operation on an entry is performed and if there is no ++driver information for that entry devfs will attempt to call ++devfsd. If still no driver information can be found then a negative ++dentry is yielded and the next stage operation will be called by the ++VFS (such as create() or mknod() inode methods). If driver information ++can be found, an inode is created (if one does not exist already) and ++all is well. ++ ++Manually creating device nodes ++ ++The mknod() method allows you to create an ordinary named pipe in the ++devfs, or you can create a character or block special inode if one ++does not already exist. You may wish to create a character or block ++special inode so that you can set permissions and ownership. Later, if ++a device driver registers an entry with the same name, the ++permissions, ownership and times are retained. This is how you can set ++the protections on a device even before the driver is loaded. Once you ++create an inode it appears in the directory listing. ++ ++Unregistering device entries ++ ++A device driver calls devfs_unregister() to unregister an entry. ++ ++Chroot() gaols ++ ++2.2.x kernels ++ ++The semantics of inode creation are different when devfs is mounted ++with the "explicit" option. Now, when a device entry is registered, it ++will not appear until you use mknod() to create the device. It doesn't ++matter if you mknod() before or after the device is registered with ++devfs_register(). The purpose of this behaviour is to support ++chroot(2) gaols, where you want to mount a minimal devfs inside the ++gaol. Only the devices you specifically want to be available (through ++your mknod() setup) will be accessible. ++ ++2.4.x kernels ++ ++As of kernel 2.3.99, the VFS has had the ability to rebind parts of ++the global filesystem namespace into another part of the namespace. ++This now works even at the leaf-node level, which means that ++individual files and device nodes may be bound into other parts of the ++namespace. This is like making links, but better, because it works ++across filesystems (unlike hard links) and works through chroot() ++gaols (unlike symbolic links). ++ ++Because of these improvements to the VFS, the multi-mount capability ++in devfs is no longer needed. The administrator may create a minimal ++device tree inside a chroot(2) gaol by using VFS bindings. As this ++provides most of the features of the devfs multi-mount capability, I ++removed the multi-mount support code (after issuing an RFC). This ++yielded code size reductions and simplifications. ++ ++If you want to construct a minimal chroot() gaol, the following ++command should suffice: ++ ++mount --bind /dev/null /gaol/dev/null ++ ++ ++Repeat for other device nodes you want to expose. Simple! ++ ++----------------------------------------------------------------------------- ++ ++ ++Operational issues ++ ++ ++Instructions for the impatient ++ ++Nobody likes reading documentation. People just want to get in there ++and play. So this section tells you quickly the steps you need to take ++to run with devfs mounted over /dev. Skip these steps and you will end ++up with a nearly unbootable system. Subsequent sections describe the ++issues in more detail, and discuss non-essential configuration ++options. ++ ++Devfsd ++OK, if you're reading this, I assume you want to play with ++devfs. First you should ensure that /usr/src/linux contains a ++recent kernel source tree. Then you need to compile devfsd, the device ++management daemon, available at ++ ++http://www.atnf.csiro.au/~rgooch/linux/. ++Because the kernel has a naming scheme ++which is quite different from the old naming scheme, you need to ++install devfsd so that software and configuration files that use the ++old naming scheme will not break. ++ ++Compile and install devfsd. You will be provided with a default ++configuration file /etc/devfsd.conf which will provide ++compatibility symlinks for the old naming scheme. Don't change this ++config file unless you know what you're doing. Even if you think you ++do know what you're doing, don't change it until you've followed all ++the steps below and booted a devfs-enabled system and verified that it ++works. ++ ++Now edit your main system boot script so that devfsd is started at the ++very beginning (before any filesystem ++checks). /etc/rc.d/rc.sysinit is often the main boot script ++on systems with SysV-style boot scripts. On systems with BSD-style ++boot scripts it is often /etc/rc. Also check ++/sbin/rc. ++ ++NOTE that the line you put into the boot ++script should be exactly: ++ ++/sbin/devfsd /dev ++ ++DO NOT use some special daemon-launching ++programme, otherwise the boot script may not wait for devfsd to finish ++initialising. ++ ++System Libraries ++There may still be some problems because of broken software making ++assumptions about device names. In particular, some software does not ++handle devices which are symbolic links. If you are running a libc 5 ++based system, install libc 5.4.44 (if you have libc 5.4.46, go back to ++libc 5.4.44, which is actually correct). If you are running a glibc ++based system, make sure you have glibc 2.1.3 or later. ++ ++/etc/securetty ++PAM (Pluggable Authentication Modules) is supposed to be a flexible ++mechanism for providing better user authentication and access to ++services. Unfortunately, it's also fragile, complex and undocumented ++(check out RedHat 6.1, and probably other distributions as well). PAM ++has problems with symbolic links. Append the following lines to your ++/etc/securetty file: ++ ++vc/1 ++vc/2 ++vc/3 ++vc/4 ++vc/5 ++vc/6 ++vc/7 ++vc/8 ++ ++This will not weaken security. If you have a version of util-linux ++earlier than 2.10.h, please upgrade to 2.10.h or later. If you ++absolutely cannot upgrade, then also append the following lines to ++your /etc/securetty file: ++ ++1 ++2 ++3 ++4 ++5 ++6 ++7 ++8 ++ ++This may potentially weaken security by allowing root logins over the ++network (a password is still required, though). However, since there ++are problems with dealing with symlinks, I'm suspicious of the level ++of security offered in any case. ++ ++XFree86 ++While not essential, it's probably a good idea to upgrade to XFree86 ++4.0, as patches went in to make it more devfs-friendly. If you don't, ++you'll probably need to apply the following patch to ++/etc/security/console.perms so that ordinary users can run ++startx. Note that not all distributions have this file (e.g. Debian), ++so if it's not present, don't worry about it. ++ ++--- /etc/security/console.perms.orig Sat Apr 17 16:26:47 1999 +++++ /etc/security/console.perms Fri Feb 25 23:53:55 2000 ++@@ -14,7 +14,7 @@ ++ # man 5 console.perms ++ ++ # file classes -- these are regular expressions ++-<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9] +++<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9] ++ ++ # device classes -- these are shell-style globs ++ <floppy>=/dev/fd[0-1]* ++ ++If the patch does not apply, then change the line: ++ ++<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9] ++ ++with: ++ ++<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9] ++ ++ ++Disable devpts ++I've had a report of devpts mounted on /dev/pts not working ++correctly. Since devfs will also manage /dev/pts, there is no ++need to mount devpts as well. You should either edit your ++/etc/fstab so devpts is not mounted, or disable devpts from ++your kernel configuration. ++ ++Unsupported drivers ++Not all drivers have devfs support. If you depend on one of these ++drivers, you will need to create a script or tarfile that you can use ++at boot time to create device nodes as appropriate. There is a ++section which describes this. Another ++section lists the drivers which have ++devfs support. ++ ++/dev/mouse ++ ++Many disributions configure /dev/mouse to be the mouse device ++for XFree86 and GPM. I actually think this is a bad idea, because it ++adds another level of indirection. When looking at a config file, if ++you see /dev/mouse you're left wondering which mouse ++is being referred to. Hence I recommend putting the actual mouse ++device (for example /dev/psaux) into your ++/etc/X11/XF86Config file (and similarly for the GPM ++configuration file). ++ ++Alternatively, use the same technique used for unsupported drivers ++described above. ++ ++The Kernel ++Finally, you need to make sure devfs is compiled into your kernel. Set ++CONFIG_EXPERIMENTAL=y, CONFIG_DEVFS_FS=y and CONFIG_DEVFS_MOUNT=y by ++using favourite configuration tool (i.e. make config or ++make xconfig) and then make clean and then recompile your kernel and ++modules. At boot, devfs will be mounted onto /dev. ++ ++If you encounter problems booting (for example if you forgot a ++configuration step), you can pass devfs=nomount at the kernel ++boot command line. This will prevent the kernel from mounting devfs at ++boot time onto /dev. ++ ++In general, a kernel built with CONFIG_DEVFS_FS=y but without mounting ++devfs onto /dev is completely safe, and requires no ++configuration changes. One exception to take note of is when ++LABEL= directives are used in /etc/fstab. In this ++case you will be unable to boot properly. This is because the ++mount(8) programme uses /proc/partitions as part of ++the volume label search process, and the device names it finds are not ++available, because setting CONFIG_DEVFS_FS=y changes the names in ++/proc/partitions, irrespective of whether devfs is mounted. ++ ++Now you've finished all the steps required. You're now ready to boot ++your shiny new kernel. Enjoy. ++ ++Changing the configuration ++ ++OK, you've now booted a devfs-enabled system, and everything works. ++Now you may feel like changing the configuration (common targets are ++/etc/fstab and /etc/devfsd.conf). Since you have a ++system that works, if you make any changes and it doesn't work, you ++now know that you only have to restore your configuration files to the ++default and it will work again. ++ ++ ++Permissions persistence across reboots ++ ++If you don't use mknod(2) to create a device file, nor use chmod(2) or ++chown(2) to change the ownerships/permissions, the inode ctime will ++remain at 0 (the epoch, 12 am, 1-JAN-1970, GMT). Anything with a ctime ++later than this has had it's ownership/permissions changed. Hence, a ++simple script or programme may be used to tar up all changed inodes, ++prior to shutdown. Although effective, many consider this approach a ++kludge. ++ ++A much better approach is to use devfsd to save and restore ++permissions. It may be configured to record changes in permissions and ++will save them in a database (in fact a directory tree), and restore ++these upon boot. This is an efficient method and results in immediate ++saving of current permissions (unlike the tar approach, which saves ++permissions at some unspecified future time). ++ ++The default configuration file supplied with devfsd has config entries ++which you may uncomment to enable persistence management. ++ ++If you decide to use the tar approach anyway, be aware that tar will ++first unlink(2) an inode before creating a new device node. The ++unlink(2) has the effect of breaking the connection between a devfs ++entry and the device driver. If you use the "devfs=only" boot option, ++you lose access to the device driver, requiring you to reload the ++module. I consider this a bug in tar (there is no real need to ++unlink(2) the inode first). ++ ++Alternatively, you can use devfsd to provide more sophisticated ++management of device permissions. You can use devfsd to store ++permissions for whole groups of devices with a single configuration ++entry, rather than the conventional single entry per device entry. ++ ++Permissions database stored in mounted-over /dev ++ ++If you wish to save and restore your device permissions into the ++disc-based /dev while still mounting devfs onto /dev ++you may do so. This requires a 2.4.x kernel (in fact, 2.3.99 or ++later), which has the VFS binding facility. You need to do the ++following to set this up: ++ ++ ++ ++make sure the kernel does not mount devfs at boot time ++ ++ ++make sure you have a correct /dev/console entry in your ++root file-system (where your disc-based /dev lives) ++ ++create the /dev-state directory ++ ++ ++add the following lines near the very beginning of your boot ++scripts: ++ ++mount --bind /dev /dev-state ++mount -t devfs none /dev ++devfsd /dev ++ ++ ++ ++ ++add the following lines to your /etc/devfsd.conf file: ++ ++REGISTER ^pt[sy] IGNORE ++CREATE ^pt[sy] IGNORE ++CHANGE ^pt[sy] IGNORE ++DELETE ^pt[sy] IGNORE ++REGISTER .* COPY /dev-state/$devname $devpath ++CREATE .* COPY $devpath /dev-state/$devname ++CHANGE .* COPY $devpath /dev-state/$devname ++DELETE .* CFUNCTION GLOBAL unlink /dev-state/$devname ++RESTORE /dev-state ++ ++Note that the sample devfsd.conf file contains these lines, ++as well as other sample configurations you may find useful. See the ++devfsd distribution ++ ++ ++reboot. ++ ++ ++ ++ ++Permissions database stored in normal directory ++ ++If you are using an older kernel which doesn't support VFS binding, ++then you won't be able to have the permissions database in a ++mounted-over /dev. However, you can still use a regular ++directory to store the database. The sample /etc/devfsd.conf ++file above may still be used. You will need to create the ++/dev-state directory prior to installing devfsd. If you have ++old permissions in /dev, then just copy (or move) the device ++nodes over to the new directory. ++ ++Which method is better? ++ ++The best method is to have the permissions database stored in the ++mounted-over /dev. This is because you will not need to copy ++device nodes over to /dev-state, and because it allows you to ++switch between devfs and non-devfs kernels, without requiring you to ++copy permissions between /dev-state (for devfs) and ++/dev (for non-devfs). ++ ++ ++Dealing with drivers without devfs support ++ ++Currently, not all device drivers in the kernel have been modified to ++use devfs. Device drivers which do not yet have devfs support will not ++automagically appear in devfs. The simplest way to create device nodes ++for these drivers is to unpack a tarfile containing the required ++device nodes. You can do this in your boot scripts. All your drivers ++will now work as before. ++ ++Hopefully for most people devfs will have enough support so that they ++can mount devfs directly over /dev without losing most functionality ++(i.e. losing access to various devices). As of 22-JAN-1998 (devfs ++patch version 10) I am now running this way. All the devices I have ++are available in devfs, so I don't lose anything. ++ ++WARNING: if your configuration requires the old-style device names ++(i.e. /dev/hda1 or /dev/sda1), you must install devfsd and configure ++it to maintain compatibility entries. It is almost certain that you ++will require this. Note that the kernel creates a compatibility entry ++for the root device, so you don't need initrd. ++ ++Note that you no longer need to mount devpts if you use Unix98 PTYs, ++as devfs can manage /dev/pts itself. This saves you some RAM, as you ++don't need to compile and install devpts. Note that some versions of ++glibc have a bug with Unix98 pty handling on devfs systems. Contact ++the glibc maintainers for a fix. Glibc 2.1.3 has the fix. ++ ++Note also that apart from editing /etc/fstab, other things will need ++to be changed if you *don't* install devfsd. Some software (like the X ++server) hard-wire device names in their source. It really is much ++easier to install devfsd so that compatibility entries are created. ++You can then slowly migrate your system to using the new device names ++(for example, by starting with /etc/fstab), and then limiting the ++compatibility entries that devfsd creates. ++ ++IF YOU CONFIGURE TO MOUNT DEVFS AT BOOT, MAKE SURE YOU INSTALL DEVFSD ++BEFORE YOU BOOT A DEVFS-ENABLED KERNEL! ++ ++Now that devfs has gone into the 2.3.46 kernel, I'm getting a lot of ++reports back. Many of these are because people are trying to run ++without devfsd, and hence some things break. Please just run devfsd if ++things break. I want to concentrate on real bugs rather than ++misconfiguration problems at the moment. If people are willing to fix ++bugs/false assumptions in other code (i.e. glibc, X server) and submit ++that to the respective maintainers, that would be great. ++ ++ ++All the way with Devfs ++ ++The devfs kernel patch creates a rationalised device tree. As stated ++above, if you want to keep using the old /dev naming scheme, ++you just need to configure devfsd appopriately (see the man ++page). People who prefer the old names can ignore this section. For ++those of us who like the rationalised names and an uncluttered ++/dev, read on. ++ ++If you don't run devfsd, or don't enable compatibility entry ++management, then you will have to configure your system to use the new ++names. For example, you will then need to edit your ++/etc/fstab to use the new disc naming scheme. If you want to ++be able to boot non-devfs kernels, you will need compatibility ++symlinks in the underlying disc-based /dev pointing back to ++the old-style names for when you boot a kernel without devfs. ++ ++You can selectively decide which devices you want compatibility ++entries for. For example, you may only want compatibility entries for ++BSD pseudo-terminal devices (otherwise you'll have to patch you C ++library or use Unix98 ptys instead). It's just a matter of putting in ++the correct regular expression into /dev/devfsd.conf. ++ ++There are other choices of naming schemes that you may prefer. For ++example, I don't use the kernel-supplied ++names, because they are too verbose. A common misconception is ++that the kernel-supplied names are meant to be used directly in ++configuration files. This is not the case. They are designed to ++reflect the layout of the devices attached and to provide easy ++classification. ++ ++If you like the kernel-supplied names, that's fine. If you don't then ++you should be using devfsd to construct a namespace more to your ++liking. Devfsd has built-in code to construct a ++namespace that is both logical and easy to ++manage. In essence, it creates a convenient abbreviation of the ++kernel-supplied namespace. ++ ++You are of course free to build your own namespace. Devfsd has all the ++infrastructure required to make this easy for you. All you need do is ++write a script. You can even write some C code and devfsd can load the ++shared object as a callable extension. ++ ++ ++Other Issues ++ ++The init programme ++Another thing to take note of is whether your init programme ++creates a Unix socket /dev/telinit. Some versions of init ++create /dev/telinit so that the telinit programme can ++communicate with the init process. If you have such a system you need ++to make sure that devfs is mounted over /dev *before* init ++starts. In other words, you can't leave the mounting of devfs to ++/etc/rc, since this is executed after init. Other ++versions of init require a named pipe /dev/initctl ++which must exist *before* init starts. Once again, you need to ++mount devfs and then create the named pipe *before* init ++starts. ++ ++The default behaviour now is not to mount devfs onto /dev at ++boot time for 2.3.x and later kernels. You can correct this with the ++"devfs=mount" boot option. This solves any problems with init, ++and also prevents the dreaded: ++ ++Cannot open initial console ++ ++message. For 2.2.x kernels where you need to apply the devfs patch, ++the default is to mount. ++ ++If you have automatic mounting of devfs onto /dev then you ++may need to create /dev/initctl in your boot scripts. The ++following lines should suffice: ++ ++mknod /dev/initctl p ++kill -SIGUSR1 1 # tell init that /dev/initctl now exists ++ ++Alternatively, if you don't want the kernel to mount devfs onto ++/dev then you could use the following procedure is a ++guideline for how to get around /dev/initctl problems: ++ ++# cd /sbin ++# mv init init.real ++# cat > init ++#! /bin/sh ++mount -n -t devfs none /dev ++mknod /dev/initctl p ++exec /sbin/init.real $* ++[control-D] ++# chmod a+x init ++ ++Note that newer versions of init create /dev/initctl ++automatically, so you don't have to worry about this. ++ ++Module autoloading ++You will need to configure devfsd to enable module ++autoloading. The following lines should be placed in your ++/etc/devfsd.conf file: ++ ++LOOKUP .* MODLOAD ++ ++ ++As of devfsd-v1.3.10, a generic /etc/modules.devfs ++configuration file is installed, which is used by the MODLOAD ++action. This should be sufficient for most configurations. If you ++require further configuration, edit your /etc/modules.conf ++file. The way module autoloading work with devfs is: ++ ++ ++a process attempts to lookup a device node (e.g. /dev/fred) ++ ++ ++if that device node does not exist, the full pathname is passed to ++devfsd as a string ++ ++ ++devfsd will pass the string to the modprobe programme (provided the ++configuration line shown above is present), and specifies that ++/etc/modules.devfs is the configuration file ++ ++ ++/etc/modules.devfs includes /etc/modules.conf to ++access local configurations ++ ++modprobe will search it's configuration files, looking for an alias ++that translates the pathname into a module name ++ ++ ++the translated pathname is then used to load the module. ++ ++ ++If you wanted a lookup of /dev/fred to load the ++mymod module, you would require the following configuration ++line in /etc/modules.conf: ++ ++alias /dev/fred mymod ++ ++The /etc/modules.devfs configuration file provides many such ++aliases for standard device names. If you look closely at this file, ++you will note that some modules require multiple alias configuration ++lines. This is required to support module autoloading for old and new ++device names. ++ ++Mounting root off a devfs device ++If you wish to mount root off a devfs device when you pass the ++"devfs=only" boot option, then you need to pass in the ++"root=<device>" option to the kernel when booting. If you use ++LILO, then you must have this in lilo.conf: ++ ++append = "root=<device>" ++ ++Surprised? Yep, so was I. It turns out if you have (as most people ++do): ++ ++root = <device> ++ ++ ++then LILO will determine the device number of <device> and will ++write that device number into a special place in the kernel image ++before starting the kernel, and the kernel will use that device number ++to mount the root filesystem. So, using the "append" variety ensures ++that LILO passes the root filesystem device as a string, which devfs ++can then use. ++ ++Note that this isn't an issue if you don't pass "devfs=only". ++ ++TTY issues ++The ttyname(3) function in some versions of the C library makes ++false assumptions about device entries which are symbolic links. The ++tty(1) programme is one that depends on this function. I've ++written a patch to libc 5.4.43 which fixes this. This has been ++included in libc 5.4.44 and a similar fix is in glibc 2.1.3. ++ ++ ++Kernel Naming Scheme ++ ++The kernel provides a default naming scheme. This scheme is designed ++to make it easy to search for specific devices or device types, and to ++view the available devices. Some device types (such as hard discs), ++have a directory of entries, making it easy to see what devices of ++that class are available. Often, the entries are symbolic links into a ++directory tree that reflects the topology of available devices. The ++topological tree is useful for finding how your devices are arranged. ++ ++Below is a list of the naming schemes for the most common drivers. A ++list of reserved device names is ++available for reference. Please send email to ++rgooch@atnf.csiro.au to obtain an allocation. Please be ++patient (the maintainer is busy). An alternative name may be allocated ++instead of the requested name, at the discretion of the maintainer. ++ ++Disc Devices ++ ++All discs, whether SCSI, IDE or whatever, are placed under the ++/dev/discs hierarchy: ++ ++ /dev/discs/disc0 first disc ++ /dev/discs/disc1 second disc ++ ++ ++Each of these entries is a symbolic link to the directory for that ++device. The device directory contains: ++ ++ disc for the whole disc ++ part* for individual partitions ++ ++ ++CD-ROM Devices ++ ++All CD-ROMs, whether SCSI, IDE or whatever, are placed under the ++/dev/cdroms hierarchy: ++ ++ /dev/cdroms/cdrom0 first CD-ROM ++ /dev/cdroms/cdrom1 second CD-ROM ++ ++ ++Each of these entries is a symbolic link to the real device entry for ++that device. ++ ++Tape Devices ++ ++All tapes, whether SCSI, IDE or whatever, are placed under the ++/dev/tapes hierarchy: ++ ++ /dev/tapes/tape0 first tape ++ /dev/tapes/tape1 second tape ++ ++ ++Each of these entries is a symbolic link to the directory for that ++device. The device directory contains: ++ ++ mt for mode 0 ++ mtl for mode 1 ++ mtm for mode 2 ++ mta for mode 3 ++ mtn for mode 0, no rewind ++ mtln for mode 1, no rewind ++ mtmn for mode 2, no rewind ++ mtan for mode 3, no rewind ++ ++ ++SCSI Devices ++ ++To uniquely identify any SCSI device requires the following ++information: ++ ++ controller (host adapter) ++ bus (SCSI channel) ++ target (SCSI ID) ++ unit (Logical Unit Number) ++ ++ ++All SCSI devices are placed under /dev/scsi (assuming devfs ++is mounted on /dev). Hence, a SCSI device with the following ++parameters: c=1,b=2,t=3,u=4 would appear as: ++ ++ /dev/scsi/host1/bus2/target3/lun4 device directory ++ ++ ++Inside this directory, a number of device entries may be created, ++depending on which SCSI device-type drivers were installed. ++ ++See the section on the disc naming scheme to see what entries the SCSI ++disc driver creates. ++ ++See the section on the tape naming scheme to see what entries the SCSI ++tape driver creates. ++ ++The SCSI CD-ROM driver creates: ++ ++ cd ++ ++ ++The SCSI generic driver creates: ++ ++ generic ++ ++ ++IDE Devices ++ ++To uniquely identify any IDE device requires the following ++information: ++ ++ controller ++ bus (aka. primary/secondary) ++ target (aka. master/slave) ++ unit ++ ++ ++All IDE devices are placed under /dev/ide, and uses a similar ++naming scheme to the SCSI subsystem. ++ ++XT Hard Discs ++ ++All XT discs are placed under /dev/xd. The first XT disc has ++the directory /dev/xd/disc0. ++ ++TTY devices ++ ++The tty devices now appear as: ++ ++ New name Old-name Device Type ++ -------- -------- ----------- ++ /dev/tts/{0,1,...} /dev/ttyS{0,1,...} Serial ports ++ /dev/cua/{0,1,...} /dev/cua{0,1,...} Call out devices ++ /dev/vc/0 /dev/tty Current virtual console ++ /dev/vc/{1,2,...} /dev/tty{1...63} Virtual consoles ++ /dev/vcc/{0,1,...} /dev/vcs{1...63} Virtual consoles ++ /dev/pty/m{0,1,...} /dev/ptyp?? PTY masters ++ /dev/pty/s{0,1,...} /dev/ttyp?? PTY slaves ++ ++ ++RAMDISCS ++ ++The RAMDISCS are placed in their own directory, and are named thus: ++ ++ /dev/rd/{0,1,2,...} ++ ++ ++Meta Devices ++ ++The meta devices are placed in their own directory, and are named ++thus: ++ ++ /dev/md/{0,1,2,...} ++ ++ ++Floppy discs ++ ++Floppy discs are placed in the /dev/floppy directory. ++ ++Loop devices ++ ++Loop devices are placed in the /dev/loop directory. ++ ++Sound devices ++ ++Sound devices are placed in the /dev/sound directory ++(audio, sequencer, ...). ++ ++ ++Devfsd Naming Scheme ++ ++Devfsd provides a naming scheme which is a convenient abbreviation of ++the kernel-supplied namespace. In some ++cases, the kernel-supplied naming scheme is quite convenient, so ++devfsd does not provide another naming scheme. The convenience names ++that devfsd creates are in fact the same names as the original devfs ++kernel patch created (before Linus mandated the Big Name ++Change). These are referred to as "new compatibility entries". ++ ++In order to configure devfsd to create these convenience names, the ++following lines should be placed in your /etc/devfsd.conf: ++ ++REGISTER .* MKNEWCOMPAT ++UNREGISTER .* RMNEWCOMPAT ++ ++This will cause devfsd to create (and destroy) symbolic links which ++point to the kernel-supplied names. ++ ++SCSI Hard Discs ++ ++All SCSI discs are placed under /dev/sd (assuming devfs is ++mounted on /dev). Hence, a SCSI disc with the following ++parameters: c=1,b=2,t=3,u=4 would appear as: ++ ++ /dev/sd/c1b2t3u4 for the whole disc ++ /dev/sd/c1b2t3u4p5 for the 5th partition ++ /dev/sd/c1b2t3u4p5s6 for the 6th slice in the 5th partition ++ ++ ++SCSI Tapes ++ ++All SCSI tapes are placed under /dev/st. A similar naming ++scheme is used as for SCSI discs. A SCSI tape with the ++parameters:c=1,b=2,t=3,u=4 would appear as: ++ ++ /dev/st/c1b2t3u4m0 for mode 0 ++ /dev/st/c1b2t3u4m1 for mode 1 ++ /dev/st/c1b2t3u4m2 for mode 2 ++ /dev/st/c1b2t3u4m3 for mode 3 ++ /dev/st/c1b2t3u4m0n for mode 0, no rewind ++ /dev/st/c1b2t3u4m1n for mode 1, no rewind ++ /dev/st/c1b2t3u4m2n for mode 2, no rewind ++ /dev/st/c1b2t3u4m3n for mode 3, no rewind ++ ++ ++SCSI CD-ROMs ++ ++All SCSI CD-ROMs are placed under /dev/sr. A similar naming ++scheme is used as for SCSI discs. A SCSI CD-ROM with the ++parameters:c=1,b=2,t=3,u=4 would appear as: ++ ++ /dev/sr/c1b2t3u4 ++ ++ ++SCSI Generic Devices ++ ++The generic (aka. raw) interface for all SCSI devices are placed under ++/dev/sg. A similar naming scheme is used as for SCSI discs. A ++SCSI generic device with the parameters:c=1,b=2,t=3,u=4 would appear ++as: ++ ++ /dev/sg/c1b2t3u4 ++ ++ ++IDE Hard Discs ++ ++All IDE discs are placed under /dev/ide/hd, using a similar ++convention to SCSI discs. The following mappings exist between the new ++and the old names: ++ ++ /dev/hda /dev/ide/hd/c0b0t0u0 ++ /dev/hdb /dev/ide/hd/c0b0t1u0 ++ /dev/hdc /dev/ide/hd/c0b1t0u0 ++ /dev/hdd /dev/ide/hd/c0b1t1u0 ++ ++ ++IDE Tapes ++ ++A similar naming scheme is used as for IDE discs. The entries will ++appear in the /dev/ide/mt directory. ++ ++IDE CD-ROM ++ ++A similar naming scheme is used as for IDE discs. The entries will ++appear in the /dev/ide/cd directory. ++ ++IDE Floppies ++ ++A similar naming scheme is used as for IDE discs. The entries will ++appear in the /dev/ide/fd directory. ++ ++XT Hard Discs ++ ++All XT discs are placed under /dev/xd. The first XT disc ++would appear as /dev/xd/c0t0. ++ ++ ++Old Compatibility Names ++ ++The old compatibility names are the legacy device names, such as ++/dev/hda, /dev/sda, /dev/rtc and so on. ++Devfsd can be configured to create compatibility symlinks so that you ++may continue to use the old names in your configuration files and so ++that old applications will continue to function correctly. ++ ++In order to configure devfsd to create these legacy names, the ++following lines should be placed in your /etc/devfsd.conf: ++ ++REGISTER .* MKOLDCOMPAT ++UNREGISTER .* RMOLDCOMPAT ++ ++This will cause devfsd to create (and destroy) symbolic links which ++point to the kernel-supplied names. ++ ++ ++----------------------------------------------------------------------------- ++ ++ ++Device drivers currently ported ++ ++- All miscellaneous character devices support devfs (this is done ++ transparently through misc_register()) ++ ++- SCSI discs and generic hard discs ++ ++- Character memory devices (null, zero, full and so on) ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- Loop devices (/dev/loop?) ++ ++- TTY devices (console, serial ports, terminals and pseudo-terminals) ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- SCSI tapes (/dev/scsi and /dev/tapes) ++ ++- SCSI CD-ROMs (/dev/scsi and /dev/cdroms) ++ ++- SCSI generic devices (/dev/scsi) ++ ++- RAMDISCS (/dev/ram?) ++ ++- Meta Devices (/dev/md*) ++ ++- Floppy discs (/dev/floppy) ++ ++- Parallel port printers (/dev/printers) ++ ++- Sound devices (/dev/sound) ++ Thanks to Eric Dumas <dumas@linux.eu.org> and ++ C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- Joysticks (/dev/joysticks) ++ ++- Sparc keyboard (/dev/kbd) ++ ++- DSP56001 digital signal processor (/dev/dsp56k) ++ ++- Apple Desktop Bus (/dev/adb) ++ ++- Coda network file system (/dev/cfs*) ++ ++- Virtual console capture devices (/dev/vcc) ++ Thanks to Dennis Hou <smilax@mindmeld.yi.org> ++ ++- Frame buffer devices (/dev/fb) ++ ++- Video capture devices (/dev/v4l) ++ ++ ++----------------------------------------------------------------------------- ++ ++ ++Allocation of Device Numbers ++ ++Devfs allows you to write a driver which doesn't need to allocate a ++device number (major&minor numbers) for the internal operation of the ++kernel. However, there are a number of userspace programmes that use ++the device number as a unique handle for a device. An example is the ++find programme, which uses device numbers to determine whether ++an inode is on a different filesystem than another inode. The device ++number used is the one for the block device which a filesystem is ++using. To preserve compatibility with userspace programmes, block ++devices using devfs need to have unique device numbers allocated to ++them. Furthermore, POSIX specifies device numbers, so some kind of ++device number needs to be presented to userspace. ++ ++The simplest option (especially when porting drivers to devfs) is to ++keep using the old major and minor numbers. Devfs will take whatever ++values are given for major&minor and pass them onto userspace. ++ ++This device number is a 16 bit number, so this leaves plenty of space ++for large numbers of discs and partitions. This scheme can also be ++used for character devices, in particular the tty devices, which are ++currently limited to 256 pseudo-ttys (this limits the total number of ++simultaneous xterms and remote logins). Note that the device number ++is limited to the range 36864-61439 (majors 144-239), in order to ++avoid any possible conflicts with existing official allocations. ++ ++Please note that using dynamically allocated block device numbers may ++break the NFS daemons (both user and kernel mode), which expect dev_t ++for a given device to be constant over the lifetime of remote mounts. ++ ++A final note on this scheme: since it doesn't increase the size of ++device numbers, there are no compatibility issues with userspace. ++ ++----------------------------------------------------------------------------- ++ ++ ++Questions and Answers ++ ++ ++Making things work ++Alternatives to devfs ++What I don't like about devfs ++How to report bugs ++Strange kernel messages ++Compilation problems with devfsd ++ ++ ++ ++Making things work ++ ++Here are some common questions and answers. ++ ++ ++ ++Devfsd doesn't start ++ ++Make sure you have compiled and installed devfsd ++Make sure devfsd is being started from your boot ++scripts ++Make sure you have configured your kernel to enable devfs (see ++below) ++Make sure devfs is mounted (see below) ++ ++ ++Devfsd is not managing all my permissions ++ ++Make sure you are capturing the appropriate events. For example, ++device entries created by the kernel generate REGISTER events, ++but those created by devfsd generate CREATE events. ++ ++ ++Devfsd is not capturing all REGISTER events ++ ++See the previous entry: you may need to capture CREATE events. ++ ++ ++X will not start ++ ++Make sure you followed the steps ++outlined above. ++ ++ ++Why don't my network devices appear in devfs? ++ ++This is not a bug. Network devices have their own, completely separate ++namespace. They are accessed via socket(2) and ++setsockopt(2) calls, and thus require no device nodes. I have ++raised the possibilty of moving network devices into the device ++namespace, but have had no response. ++ ++ ++How can I test if I have devfs compiled into my kernel? ++ ++All filesystems built-in or currently loaded are listed in ++/proc/filesystems. If you see a devfs entry, then ++you know that devfs was compiled into your kernel. If you have ++correctly configured and rebuilt your kernel, then devfs will be ++built-in. If you think you've configured it in, but ++/proc/filesystems doesn't show it, you've made a mistake. ++Common mistakes include: ++ ++Using a 2.2.x kernel without applying the devfs patch (if you ++don't know how to patch your kernel, use 2.4.x instead, don't bother ++asking me how to patch) ++Forgetting to set CONFIG_EXPERIMENTAL=y ++Forgetting to set CONFIG_DEVFS_FS=y ++Forgetting to set CONFIG_DEVFS_MOUNT=y (if you want devfs ++to be automatically mounted at boot) ++Editing your .config manually, instead of using make ++config or make xconfig ++Forgetting to run make dep; make clean after changing the ++configuration and before compiling ++Forgetting to compile your kernel and modules ++Forgetting to install your kernel ++Forgetting to install your modules ++ ++Please check twice that you've done all these steps before sending in ++a bug report. ++ ++ ++ ++How can I test if devfs is mounted on /dev? ++ ++The device filesystem will always create an entry called ++".devfsd", which is used to communicate with the daemon. Even ++if the daemon is not running, this entry will exist. Testing for the ++existence of this entry is the approved method of determining if devfs ++is mounted or not. Note that the type of entry (i.e. regular file, ++character device, named pipe, etc.) may change without notice. Only ++the existence of the entry should be relied upon. ++ ++ ++When I start devfsd, I see the error: ++Error opening file: ".devfsd" No such file or directory? ++ ++This means that devfs is not mounted. Make sure you have devfs mounted. ++ ++ ++How do I mount devfs? ++ ++First make sure you have devfs compiled into your kernel (see ++above). Then you will either need to: ++ ++set CONFIG_DEVFS_MOUNT=y in your kernel config ++pass devfs=mount to your boot loader ++mount devfs manually in your boot scripts with: ++mount -t none devfs /dev ++ ++ ++ ++Mount by volume LABEL=<label> doesn't work with ++devfs ++ ++Most probably you are not mounting devfs onto /dev. What ++happens is that if your kernel config has CONFIG_DEVFS_FS=y ++then the contents of /proc/partitions will have the devfs ++names (such as scsi/host0/bus0/target0/lun0/part1). The ++contents of /proc/partitions are used by mount(8) when ++mounting by volume label. If devfs is not mounted on /dev, ++then mount(8) will fail to find devices. The solution is to ++make sure that devfs is mounted on /dev. See above for how to ++do that. ++ ++ ++I have extra or incorrect entries in /dev ++ ++You may have stale entries in your dev-state area. Check for a ++RESTORE configuration line in your devfsd configuration ++(typically /etc/devfsd.conf). If you have this line, check ++the contents of the specified directory for stale entries. Remove ++any entries which are incorrect, then reboot. ++ ++ ++I get "Unable to open initial console" messages at boot ++ ++This usually happens when you don't have devfs automounted onto ++/dev at boot time, and there is no valid ++/dev/console entry on your root file-system. Create a valid ++/dev/console device node. ++ ++ ++ ++ ++ ++Alternatives to devfs ++ ++I've attempted to collate all the anti-devfs proposals and explain ++their limitations. Under construction. ++ ++ ++Why not just pass device create/remove events to a daemon? ++ ++Here the suggestion is to develop an API in the kernel so that devices ++can register create and remove events, and a daemon listens for those ++events. The daemon would then populate/depopulate /dev (which ++resides on disc). ++ ++This has several limitations: ++ ++ ++it only works for modules loaded and unloaded (or devices inserted ++and removed) after the kernel has finished booting. Without a database ++of events, there is no way the daemon could fully populate ++/dev ++ ++ ++if you add a database to this scheme, the question is then how to ++present that database to user-space. If you make it a list of strings ++with embedded event codes which are passed through a pipe to the ++daemon, then this is only of use to the daemon. I would argue that the ++natural way to present this data is via a filesystem (since many of ++the events will be of a hierarchical nature), such as devfs. ++Presenting the data as a filesystem makes it easy for the user to see ++what is available and also makes it easy to write scripts to scan the ++"database" ++ ++ ++the tight binding between device nodes and drivers is no longer ++possible (requiring the otherwise perfectly avoidable ++table lookups) ++ ++ ++you cannot catch inode lookup events on /dev which means ++that module autoloading requires device nodes to be created. This is a ++problem, particularly for drivers where only a few inodes are created ++from a potentially large set ++ ++ ++this technique can't be used when the root FS is mounted ++read-only ++ ++ ++ ++ ++Just implement a better scsidev ++ ++This suggestion involves taking the scsidev programme and ++extending it to scan for all devices, not just SCSI devices. The ++scsidev programme works by scanning /proc/scsi ++ ++Problems: ++ ++ ++the kernel does not currently provide a list of all devices ++available. Not all drivers register entries in /proc or ++generate kernel messages ++ ++ ++there is no uniform mechanism to register devices other than the ++devfs API ++ ++ ++implementing such an API is then the same as the ++proposal above ++ ++ ++ ++ ++Put /dev on a ramdisc ++ ++This suggestion involves creating a ramdisc and populating it with ++device nodes and then mounting it over /dev. ++ ++Problems: ++ ++ ++ ++this doesn't help when mounting the root filesystem, since you ++still need a device node to do that ++ ++ ++if you want to use this technique for the root device node as ++well, you need to use initrd. This complicates the booting sequence ++and makes it significantly harder to administer and configure. The ++initrd is essentially opaque, robbing the system administrator of easy ++configuration ++ ++ ++insufficient information is available to correctly populate the ++ramdisc. So we come back to the ++proposal above to "solve" this ++ ++ ++a ramdisc-based solution would take more kernel memory, since the ++backing store would be (at best) normal VFS inodes and dentries, which ++take 284 bytes and 112 bytes, respectively, for each entry. Compare ++that to 72 bytes for devfs ++ ++ ++ ++ ++Do nothing: there's no problem ++ ++Sometimes people can be heard to claim that the existing scheme is ++fine. This is what they're ignoring: ++ ++ ++device number size (8 bits each for major and minor) is a real ++limitation, and must be fixed somehow. Systems with large numbers of ++SCSI devices, for example, will continue to consume the remaining ++unallocated major numbers. USB will also need to push beyond the 8 bit ++minor limitation ++ ++ ++simply increasing the device number size is insufficient. Apart ++from causing a lot of pain, it doesn't solve the management issues ++of a /dev with thousands or more device nodes ++ ++ ++ignoring the problem of a huge /dev will not make it go ++away, and dismisses the legitimacy of a large number of people who ++want a dynamic /dev ++ ++ ++the standard response then becomes: "write a device management ++daemon", which brings us back to the ++proposal above ++ ++ ++ ++ ++What I don't like about devfs ++ ++Here are some common complaints about devfs, and some suggestions and ++solutions that may make it more palatable for you. I can't please ++everybody, but I do try :-) ++ ++I hate the naming scheme ++ ++First, remember that no naming scheme will please everybody. You hate ++the scheme, others love it. Who's to say who's right and who's wrong? ++Ultimately, the person who writes the code gets to choose, and what ++exists now is a combination of the choices made by the ++devfs author and the ++kernel maintainer (Linus). ++ ++However, not all is lost. If you want to create your own naming ++scheme, it is a simple matter to write a standalone script, hack ++devfsd, or write a script called by devfsd. You can create whatever ++naming scheme you like. ++ ++Further, if you want to remove all traces of the devfs naming scheme ++from /dev, you can mount devfs elsewhere (say ++/devfs) and populate /dev with links into ++/devfs. This population can be automated using devfsd if you ++wish. ++ ++You can even use the VFS binding facility to make the links, rather ++than using symbolic links. This way, you don't even have to see the ++"destination" of these symbolic links. ++ ++Devfs puts policy into the kernel ++ ++There's already policy in the kernel. Device numbers are in fact ++policy (why should the kernel dictate what device numbers I use?). ++Face it, some policy has to be in the kernel. The real difference ++between device names as policy and device numbers as policy is that ++no one will use device numbers directly, because device ++numbers are devoid of meaning to humans and are ugly. At least with ++the devfs device names, (even though you can add your own naming ++scheme) some people will use the devfs-supplied names directly. This ++offends some people :-) ++ ++Devfs is bloatware ++ ++This is not even remotely true. As shown above, ++both code and data size are quite modest. ++ ++ ++How to report bugs ++ ++If you have (or think you have) a bug with devfs, please follow the ++steps below: ++ ++ ++ ++make sure you have enabled debugging output when configuring your ++kernel. You will need to set (at least) the following config options: ++ ++CONFIG_DEVFS_DEBUG=y ++CONFIG_DEBUG_KERNEL=y ++CONFIG_DEBUG_SLAB=y ++ ++ ++ ++please make sure you have the latest devfs patches applied. The ++latest kernel version might not have the latest devfs patches applied ++yet (Linus is very busy) ++ ++ ++save a copy of your complete kernel logs (preferably by ++using the dmesg programme) for later inclusion in your bug ++report. You may need to use the -s switch to increase the ++internal buffer size so you can capture all the boot messages. ++Don't edit or trim the dmesg output ++ ++ ++ ++ ++try booting with devfs=dall passed to the kernel boot ++command line (read the documentation on your bootloader on how to do ++this), and save the result to a file. This may be quite verbose, and ++it may overflow the messages buffer, but try to get as much of it as ++you can ++ ++ ++send a copy of your devfsd configuration file(s) ++ ++send the bug report to me first. ++Don't expect that I will see it if you post it to the linux-kernel ++mailing list. Include all the information listed above, plus ++anything else that you think might be relevant. Put the string ++devfs somewhere in the subject line, so my mail filters mark ++it as urgent ++ ++ ++ ++ ++Here is a general guide on how to ask questions in a way that greatly ++improves your chances of getting a reply: ++ ++http://www.tuxedo.org/~esr/faqs/smart-questions.html. If you have ++a bug to report, you should also read ++ ++http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. ++ ++ ++Strange kernel messages ++ ++You may see devfs-related messages in your kernel logs. Below are some ++messages and what they mean (and what you should do about them, if ++anything). ++ ++ ++ ++devfs_register(fred): could not append to parent, err: -17 ++ ++You need to check what the error code means, but usually 17 means ++EEXIST. This means that a driver attempted to create an entry ++fred in a directory, but there already was an entry with that ++name. This is often caused by flawed boot scripts which untar a bunch ++of inodes into /dev, as a way to restore permissions. This ++message is harmless, as the device nodes will still ++provide access to the driver (unless you use the devfs=only ++boot option, which is only for dedicated souls:-). If you want to get ++rid of these annoying messages, upgrade to devfsd-v1.3.20 and use the ++recommended RESTORE directive to restore permissions. ++ ++ ++devfs_mk_dir(bill): using old entry in dir: c1808724 "" ++ ++This is similar to the message above, except that a driver attempted ++to create a directory named bill, and the parent directory ++has an entry with the same name. In this case, to ensure that drivers ++continue to work properly, the old entry is re-used and given to the ++driver. In 2.5 kernels, the driver is given a NULL entry, and thus, ++under rare circumstances, may not create the require device nodes. ++The solution is the same as above. ++ ++ ++ ++ ++ ++Compilation problems with devfsd ++ ++Usually, you can compile devfsd just by typing in ++make in the source directory, followed by a make ++install (as root). Sometimes, you may have problems, particularly ++on broken configurations. ++ ++ ++ ++error messages relating to DEVFSD_NOTIFY_DELETE ++ ++This happened because you have an ancient set of kernel headers ++installed in /usr/include/linux or /usr/src/linux. ++Install kernel 2.4.10 or later. You may need to pass the ++KERNEL_DIR variable to make (if you did not install ++the new kernel sources as /usr/src/linux), or you may copy ++the devfs_fs.h file in the kernel source tree into ++/usr/include/linux. ++ ++ ++ ++ ++----------------------------------------------------------------------------- ++ ++ ++Other resources ++ ++ ++ ++Douglas Gilbert has written a useful document at ++ ++http://www.torque.net/sg/devfs_scsi.html which ++explores the SCSI subsystem and how it interacts with devfs ++ ++ ++Douglas Gilbert has written another useful document at ++ ++http://www.torque.net/scsi/SCSI-2.4-HOWTO/ which ++discusses the Linux SCSI subsystem in 2.4. ++ ++ ++Johannes Erdfelt has started a discussion paper on Linux and ++hot-swap devices, describing what the requirements are for a scalable ++solution and how and why he's used devfs+devfsd. Note that this is an ++early draft only, available in plain text form at: ++ ++http://johannes.erdfelt.com/hotswap.txt. ++Johannes has promised a HTML version will follow. ++ ++ ++I presented an invited ++paper ++at the ++ ++2nd Annual Storage Management Workshop held in Miamia, Florida, ++U.S.A. in October 2000. ++ ++ ++ ++ ++----------------------------------------------------------------------------- ++ ++ ++Translations of this document ++ ++This document has been translated into other languages. ++ ++ ++ ++ ++The document master (in English) by rgooch@atnf.csiro.au is ++available at ++ ++http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html ++ ++ ++ ++A Korean translation by viatoris@nownuri.net is available at ++ ++http://your.destiny.pe.kr/devfs/devfs.html ++ ++ ++ ++ ++----------------------------------------------------------------------------- ++Most flags courtesy of ITA's ++Flags of All Countries ++used with permission. +diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/ToDo linux-2.6.19.dev/Documentation/filesystems/devfs/ToDo +--- linux-2.6.19.old/Documentation/filesystems/devfs/ToDo 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/filesystems/devfs/ToDo 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,40 @@ ++ Device File System (devfs) ToDo List ++ ++ Richard Gooch <rgooch@atnf.csiro.au> ++ ++ 3-JUL-2000 ++ ++This is a list of things to be done for better devfs support in the ++Linux kernel. If you'd like to contribute to the devfs, please have a ++look at this list for anything that is unallocated. Also, if there are ++items missing (surely), please contact me so I can add them to the ++list (preferably with your name attached to them:-). ++ ++ ++- >256 ptys ++ Thanks to C. Scott Ananian <cananian@alumni.princeton.edu> ++ ++- Amiga floppy driver (drivers/block/amiflop.c) ++ ++- Atari floppy driver (drivers/block/ataflop.c) ++ ++- SWIM3 (Super Woz Integrated Machine 3) floppy driver (drivers/block/swim3.c) ++ ++- Amiga ZorroII ramdisc driver (drivers/block/z2ram.c) ++ ++- Parallel port ATAPI CD-ROM (drivers/block/paride/pcd.c) ++ ++- Parallel port ATAPI floppy (drivers/block/paride/pf.c) ++ ++- AP1000 block driver (drivers/ap1000/ap.c, drivers/ap1000/ddv.c) ++ ++- Archimedes floppy (drivers/acorn/block/fd1772.c) ++ ++- MFM hard drive (drivers/acorn/block/mfmhd.c) ++ ++- I2O block device (drivers/message/i2o/i2o_block.c) ++ ++- ST-RAM device (arch/m68k/atari/stram.c) ++ ++- Raw devices ++ +diff -urN linux-2.6.19.old/Documentation/ioctl-number.txt linux-2.6.19.dev/Documentation/ioctl-number.txt +--- linux-2.6.19.old/Documentation/ioctl-number.txt 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/ioctl-number.txt 2006-12-14 03:12:59.000000000 +0100 +@@ -119,6 +119,7 @@ + 'c' 00-7F linux/comstats.h conflict! + 'c' 00-7F linux/coda.h conflict! + 'd' 00-FF linux/char/drm/drm/h conflict! ++'d' 00-1F linux/devfs_fs.h conflict! + 'd' 00-DF linux/video_decoder.h conflict! + 'd' F0-FF linux/digi1.h + 'e' all linux/digi1.h conflict! +diff -urN linux-2.6.19.old/Documentation/kernel-parameters.txt linux-2.6.19.dev/Documentation/kernel-parameters.txt +--- linux-2.6.19.old/Documentation/kernel-parameters.txt 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/Documentation/kernel-parameters.txt 2006-12-14 03:12:59.000000000 +0100 +@@ -35,6 +35,7 @@ + APM Advanced Power Management support is enabled. + AX25 Appropriate AX.25 support is enabled. + CD Appropriate CD support is enabled. ++ DEVFS devfs support is enabled. + DRM Direct Rendering Management support is enabled. + EDD BIOS Enhanced Disk Drive Services (EDD) is enabled + EFI EFI Partitioning (GPT) is enabled +@@ -456,6 +457,9 @@ + Format: <area>[,<node>] + See also Documentation/networking/decnet.txt. + ++ devfs= [DEVFS] ++ See Documentation/filesystems/devfs/boot-options. ++ + dhash_entries= [KNL] + Set number of hash buckets for dentry cache. + +diff -urN linux-2.6.19.old/drivers/block/acsi.c linux-2.6.19.dev/drivers/block/acsi.c +--- linux-2.6.19.old/drivers/block/acsi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/acsi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1731,10 +1731,13 @@ + struct gendisk *disk = acsi_gendisk[i]; + sprintf(disk->disk_name, "ad%c", 'a'+i); + aip = &acsi_info[NDevices]; ++ sprintf(disk->devfs_name, "ad/target%d/lun%d", aip->target, aip->lun); + disk->major = ACSI_MAJOR; + disk->first_minor = i << 4; +- if (acsi_info[i].type != HARDDISK) ++ if (acsi_info[i].type != HARDDISK) { + disk->minors = 1; ++ strcat(disk->devfs_name, "/disc"); ++ } + disk->fops = &acsi_fops; + disk->private_data = &acsi_info[i]; + set_capacity(disk, acsi_info[i].size); +diff -urN linux-2.6.19.old/drivers/block/acsi_slm.c linux-2.6.19.dev/drivers/block/acsi_slm.c +--- linux-2.6.19.old/drivers/block/acsi_slm.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/acsi_slm.c 2006-12-14 03:12:59.000000000 +0100 +@@ -65,6 +65,7 @@ + #include <linux/time.h> + #include <linux/mm.h> + #include <linux/slab.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + + #include <asm/pgtable.h> +@@ -1004,6 +1005,11 @@ + BufferP = SLMBuffer; + SLMState = IDLE; + ++ devfs_mk_dir("slm"); ++ for (i = 0; i < MAX_SLM; i++) { ++ devfs_mk_cdev(MKDEV(ACSI_MAJOR, i), ++ S_IFCHR|S_IRUSR|S_IWUSR, "slm/%d", i); ++ } + return 0; + } + +@@ -1026,6 +1032,10 @@ + + void cleanup_module(void) + { ++ int i; ++ for (i = 0; i < MAX_SLM; i++) ++ devfs_remove("slm/%d", i); ++ devfs_remove("slm"); + if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0) + printk( KERN_ERR "acsi_slm: cleanup_module failed\n"); + atari_stram_free( SLMBuffer ); +diff -urN linux-2.6.19.old/drivers/block/cpqarray.c linux-2.6.19.dev/drivers/block/cpqarray.c +--- linux-2.6.19.old/drivers/block/cpqarray.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/cpqarray.c 2006-12-14 03:12:59.000000000 +0100 +@@ -32,6 +32,7 @@ + #include <linux/blkpg.h> + #include <linux/timer.h> + #include <linux/proc_fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/init.h> + #include <linux/hdreg.h> + #include <linux/spinlock.h> +@@ -346,6 +347,7 @@ + for(j = 0; j < NWD; j++) { + if (ida_gendisk[i][j]->flags & GENHD_FL_UP) + del_gendisk(ida_gendisk[i][j]); ++ devfs_remove("ida/c%dd%d",i,j); + put_disk(ida_gendisk[i][j]); + } + blk_cleanup_queue(hba[i]->queue); +@@ -1808,6 +1810,8 @@ + + } + ++ sprintf(disk->devfs_name, "ida/c%dd%d", ctlr, log_unit); ++ + info_p->phys_drives = + sense_config_buf->ctlr_phys_drv; + info_p->drv_assign_map +@@ -1843,6 +1847,7 @@ + } + } + ++ devfs_remove("ida"); + remove_proc_entry("cpqarray", proc_root_driver); + } + +diff -urN linux-2.6.19.old/drivers/block/DAC960.c linux-2.6.19.dev/drivers/block/DAC960.c +--- linux-2.6.19.old/drivers/block/DAC960.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/DAC960.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2530,6 +2530,7 @@ + blk_queue_max_sectors(RequestQueue, Controller->MaxBlocksPerCommand); + disk->queue = RequestQueue; + sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n); ++ sprintf(disk->devfs_name, "rd/host%d/target%d", Controller->ControllerNumber, n); + disk->major = MajorNumber; + disk->first_minor = n << DAC960_MaxPartitionsBits; + disk->fops = &DAC960_BlockDeviceOperations; +diff -urN linux-2.6.19.old/drivers/block/floppy.c linux-2.6.19.dev/drivers/block/floppy.c +--- linux-2.6.19.old/drivers/block/floppy.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/floppy.c 2006-12-14 03:12:59.000000000 +0100 +@@ -177,6 +177,7 @@ + #include <linux/ioport.h> + #include <linux/interrupt.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/platform_device.h> + #include <linux/buffer_head.h> /* for invalidate_buffers() */ + #include <linux/mutex.h> +@@ -223,6 +224,7 @@ + static unsigned short virtual_dma_port = 0x3f0; + irqreturn_t floppy_interrupt(int irq, void *dev_id); + static int set_dor(int fdc, char mask, char data); ++static void register_devfs_entries(int drive) __init; + + #define K_64 0x10000 /* 64KB */ + +@@ -3652,6 +3654,7 @@ + first = 0; + } + printk("%s fd%d is %s", prepend, drive, name); ++ register_devfs_entries(drive); + } + *UDP = *params; + } +@@ -3921,6 +3924,23 @@ + .revalidate_disk = floppy_revalidate, + }; + ++static void __init register_devfs_entries(int drive) ++{ ++ int base_minor = (drive < 4) ? drive : (124 + drive); ++ ++ if (UDP->cmos < ARRAY_SIZE(default_drive_params)) { ++ int i = 0; ++ do { ++ int minor = base_minor + (table_sup[UDP->cmos][i] << 2); ++ ++ devfs_mk_bdev(MKDEV(FLOPPY_MAJOR, minor), ++ S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP | ++ S_IWGRP, "floppy/%d%s", drive, ++ table[table_sup[UDP->cmos][i]]); ++ } while (table_sup[UDP->cmos][i++]); ++ } ++} ++ + /* + * Floppy Driver initialization + * ============================= +@@ -4201,9 +4221,11 @@ + motor_off_timer[dr].function = motor_off_callback; + } + ++ devfs_mk_dir("floppy"); ++ + err = register_blkdev(FLOPPY_MAJOR, "fd"); + if (err) +- goto out_put_disk; ++ goto out_devfs_remove; + + floppy_queue = blk_init_queue(do_fd_request, &floppy_lock); + if (!floppy_queue) { +@@ -4354,6 +4376,8 @@ + blk_cleanup_queue(floppy_queue); + out_unreg_blkdev: + unregister_blkdev(FLOPPY_MAJOR, "fd"); ++out_devfs_remove: ++ devfs_remove("floppy"); + out_put_disk: + while (dr--) { + del_timer(&motor_off_timer[dr]); +@@ -4514,6 +4538,19 @@ + + static char *floppy; + ++static void unregister_devfs_entries(int drive) ++{ ++ int i; ++ ++ if (UDP->cmos < ARRAY_SIZE(default_drive_params)) { ++ i = 0; ++ do { ++ devfs_remove("floppy/%d%s", drive, ++ table[table_sup[UDP->cmos][i]]); ++ } while (table_sup[UDP->cmos][i++]); ++ } ++} ++ + static void __init parse_floppy_cfg_string(char *cfg) + { + char *ptr; +@@ -4550,11 +4587,13 @@ + if ((allowed_drive_mask & (1 << drive)) && + fdc_state[FDC(drive)].version != FDC_NONE) { + del_gendisk(disks[drive]); ++ unregister_devfs_entries(drive); + device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); + platform_device_unregister(&floppy_device[drive]); + } + put_disk(disks[drive]); + } ++ devfs_remove("floppy"); + + del_timer_sync(&fd_timeout); + del_timer_sync(&fd_timer); +diff -urN linux-2.6.19.old/drivers/block/loop.c linux-2.6.19.dev/drivers/block/loop.c +--- linux-2.6.19.old/drivers/block/loop.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/loop.c 2006-12-14 03:12:59.000000000 +0100 +@@ -62,6 +62,7 @@ + #include <linux/blkdev.h> + #include <linux/blkpg.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + #include <linux/swap.h> + #include <linux/slab.h> +@@ -1426,6 +1427,8 @@ + goto out_mem3; + } + ++ devfs_mk_dir("loop"); ++ + for (i = 0; i < max_loop; i++) { + struct loop_device *lo = &loop_dev[i]; + struct gendisk *disk = disks[i]; +@@ -1443,6 +1446,7 @@ + disk->first_minor = i; + disk->fops = &lo_fops; + sprintf(disk->disk_name, "loop%d", i); ++ sprintf(disk->devfs_name, "loop/%d", i); + disk->private_data = lo; + disk->queue = lo->lo_queue; + } +@@ -1456,6 +1460,7 @@ + out_mem4: + while (i--) + blk_cleanup_queue(loop_dev[i].lo_queue); ++ devfs_remove("loop"); + i = max_loop; + out_mem3: + while (i--) +@@ -1478,6 +1483,7 @@ + blk_cleanup_queue(loop_dev[i].lo_queue); + put_disk(disks[i]); + } ++ devfs_remove("loop"); + if (unregister_blkdev(LOOP_MAJOR, "loop")) + printk(KERN_WARNING "loop: cannot unregister blkdev\n"); + +diff -urN linux-2.6.19.old/drivers/block/nbd.c linux-2.6.19.dev/drivers/block/nbd.c +--- linux-2.6.19.old/drivers/block/nbd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/nbd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -29,6 +29,8 @@ + #include <linux/kernel.h> + #include <net/sock.h> + ++#include <linux/devfs_fs_kernel.h> ++ + #include <asm/uaccess.h> + #include <asm/system.h> + #include <asm/types.h> +@@ -643,6 +645,7 @@ + printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR); + dprintk(DBG_INIT, "nbd: debugflags=0x%x\n", debugflags); + ++ devfs_mk_dir("nbd"); + for (i = 0; i < nbds_max; i++) { + struct gendisk *disk = nbd_dev[i].disk; + nbd_dev[i].file = NULL; +@@ -660,6 +663,7 @@ + disk->private_data = &nbd_dev[i]; + disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO; + sprintf(disk->disk_name, "nbd%d", i); ++ sprintf(disk->devfs_name, "nbd/%d", i); + set_capacity(disk, 0x7ffffc00ULL << 1); /* 2 TB */ + add_disk(disk); + } +@@ -685,6 +689,7 @@ + put_disk(disk); + } + } ++ devfs_remove("nbd"); + unregister_blkdev(NBD_MAJOR, "nbd"); + printk(KERN_INFO "nbd: unregistered device at major %d\n", NBD_MAJOR); + } +diff -urN linux-2.6.19.old/drivers/block/paride/pg.c linux-2.6.19.dev/drivers/block/paride/pg.c +--- linux-2.6.19.old/drivers/block/paride/pg.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/paride/pg.c 2006-12-14 03:12:59.000000000 +0100 +@@ -156,6 +156,7 @@ + #include <linux/module.h> + #include <linux/init.h> + #include <linux/fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/delay.h> + #include <linux/slab.h> + #include <linux/mtio.h> +@@ -673,15 +674,25 @@ + err = PTR_ERR(pg_class); + goto out_chrdev; + } ++ devfs_mk_dir("pg"); + for (unit = 0; unit < PG_UNITS; unit++) { + struct pg *dev = &devices[unit]; +- if (dev->present) ++ if (dev->present) { + class_device_create(pg_class, NULL, MKDEV(major, unit), + NULL, "pg%u", unit); ++ err = devfs_mk_cdev(MKDEV(major, unit), ++ S_IFCHR | S_IRUSR | S_IWUSR, "pg/%u", ++ unit); ++ if (err) ++ goto out_class; ++ } + } + err = 0; + goto out; + ++out_class: ++ class_device_destroy(pg_class, MKDEV(major, unit)); ++ class_destroy(pg_class); + out_chrdev: + unregister_chrdev(major, "pg"); + out: +@@ -694,10 +705,13 @@ + + for (unit = 0; unit < PG_UNITS; unit++) { + struct pg *dev = &devices[unit]; +- if (dev->present) ++ if (dev->present) { + class_device_destroy(pg_class, MKDEV(major, unit)); ++ devfs_remove("pg/%u", unit); ++ } + } + class_destroy(pg_class); ++ devfs_remove("pg"); + unregister_chrdev(major, name); + + for (unit = 0; unit < PG_UNITS; unit++) { +diff -urN linux-2.6.19.old/drivers/block/paride/pt.c linux-2.6.19.dev/drivers/block/paride/pt.c +--- linux-2.6.19.old/drivers/block/paride/pt.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/paride/pt.c 2006-12-14 03:12:59.000000000 +0100 +@@ -141,6 +141,7 @@ + #include <linux/module.h> + #include <linux/init.h> + #include <linux/fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/delay.h> + #include <linux/slab.h> + #include <linux/mtio.h> +@@ -970,15 +971,32 @@ + goto out_chrdev; + } + ++ devfs_mk_dir("pt"); + for (unit = 0; unit < PT_UNITS; unit++) + if (pt[unit].present) { + class_device_create(pt_class, NULL, MKDEV(major, unit), + NULL, "pt%d", unit); ++ err = devfs_mk_cdev(MKDEV(major, unit), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "pt/%d", unit); ++ if (err) { ++ class_device_destroy(pt_class, MKDEV(major, unit)); ++ goto out_class; ++ } + class_device_create(pt_class, NULL, MKDEV(major, unit + 128), + NULL, "pt%dn", unit); ++ err = devfs_mk_cdev(MKDEV(major, unit + 128), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "pt/%dn", unit); ++ if (err) { ++ class_device_destroy(pt_class, MKDEV(major, unit + 128)); ++ goto out_class; ++ } + } + goto out; + ++out_class: ++ class_destroy(pt_class); + out_chrdev: + unregister_chrdev(major, "pt"); + out: +@@ -991,9 +1009,12 @@ + for (unit = 0; unit < PT_UNITS; unit++) + if (pt[unit].present) { + class_device_destroy(pt_class, MKDEV(major, unit)); ++ devfs_remove("pt/%d", unit); + class_device_destroy(pt_class, MKDEV(major, unit + 128)); ++ devfs_remove("pt/%dn", unit); + } + class_destroy(pt_class); ++ devfs_remove("pt"); + unregister_chrdev(major, name); + for (unit = 0; unit < PT_UNITS; unit++) + if (pt[unit].present) +diff -urN linux-2.6.19.old/drivers/block/pktcdvd.c linux-2.6.19.dev/drivers/block/pktcdvd.c +--- linux-2.6.19.old/drivers/block/pktcdvd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/pktcdvd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2613,6 +2613,7 @@ + static struct miscdevice pkt_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = DRIVER_NAME, ++ .devfs_name = "pktcdvd/control", + .fops = &pkt_ctl_fops + }; + +diff -urN linux-2.6.19.old/drivers/block/ps2esdi.c linux-2.6.19.dev/drivers/block/ps2esdi.c +--- linux-2.6.19.old/drivers/block/ps2esdi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/ps2esdi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -419,6 +419,7 @@ + disk->major = PS2ESDI_MAJOR; + disk->first_minor = i<<6; + sprintf(disk->disk_name, "ed%c", 'a'+i); ++ sprintf(disk->devfs_name, "ed/target%d", i); + disk->fops = &ps2esdi_fops; + ps2esdi_gendisk[i] = disk; + } +diff -urN linux-2.6.19.old/drivers/block/rd.c linux-2.6.19.dev/drivers/block/rd.c +--- linux-2.6.19.old/drivers/block/rd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/rd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -49,6 +49,7 @@ + #include <linux/module.h> + #include <linux/moduleparam.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/pagemap.h> + #include <linux/blkdev.h> + #include <linux/genhd.h> +@@ -410,6 +411,7 @@ + put_disk(rd_disks[i]); + blk_cleanup_queue(rd_queue[i]); + } ++ devfs_remove("rd"); + unregister_blkdev(RAMDISK_MAJOR, "ramdisk"); + } + +@@ -445,6 +447,8 @@ + goto out; + } + ++ devfs_mk_dir("rd"); ++ + for (i = 0; i < CONFIG_BLK_DEV_RAM_COUNT; i++) { + struct gendisk *disk = rd_disks[i]; + +@@ -458,6 +462,7 @@ + disk->queue = rd_queue[i]; + disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO; + sprintf(disk->disk_name, "ram%d", i); ++ sprintf(disk->devfs_name, "rd/%d", i); + set_capacity(disk, rd_size * 2); + add_disk(rd_disks[i]); + } +diff -urN linux-2.6.19.old/drivers/block/sx8.c linux-2.6.19.dev/drivers/block/sx8.c +--- linux-2.6.19.old/drivers/block/sx8.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/sx8.c 2006-12-14 03:12:59.000000000 +0100 +@@ -18,6 +18,7 @@ + #include <linux/spinlock.h> + #include <linux/blkdev.h> + #include <linux/sched.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/interrupt.h> + #include <linux/compiler.h> + #include <linux/workqueue.h> +@@ -1509,6 +1510,7 @@ + port->disk = disk; + sprintf(disk->disk_name, DRV_NAME "/%u", + (unsigned int) (host->id * CARM_MAX_PORTS) + i); ++ sprintf(disk->devfs_name, DRV_NAME "/%u_%u", host->id, i); + disk->major = host->major; + disk->first_minor = i * CARM_MINORS_PER_MAJOR; + disk->fops = &carm_bd_ops; +@@ -1670,6 +1672,8 @@ + if (host->flags & FL_DYN_MAJOR) + host->major = rc; + ++ devfs_mk_dir(DRV_NAME); ++ + rc = carm_init_disks(host); + if (rc) + goto err_out_blkdev_disks; +@@ -1735,6 +1739,7 @@ + + free_irq(pdev->irq, host); + carm_free_disks(host); ++ devfs_remove(DRV_NAME); + unregister_blkdev(host->major, host->name); + if (host->major == 160) + clear_bit(0, &carm_major_alloc); +diff -urN linux-2.6.19.old/drivers/block/ub.c linux-2.6.19.dev/drivers/block/ub.c +--- linux-2.6.19.old/drivers/block/ub.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/ub.c 2006-12-14 03:12:59.000000000 +0100 +@@ -24,10 +24,12 @@ + #include <linux/usb.h> + #include <linux/usb_usual.h> + #include <linux/blkdev.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/timer.h> + #include <scsi/scsi.h> + + #define DRV_NAME "ub" ++#define DEVFS_NAME DRV_NAME + + #define UB_MAJOR 180 + +@@ -2301,6 +2303,7 @@ + goto err_diskalloc; + + sprintf(disk->disk_name, DRV_NAME "%c", lun->id + 'a'); ++ sprintf(disk->devfs_name, DEVFS_NAME "/%c", lun->id + 'a'); + disk->major = UB_MAJOR; + disk->first_minor = lun->id * UB_PARTS_PER_LUN; + disk->fops = &ub_bd_fops; +@@ -2454,6 +2457,7 @@ + + if ((rc = register_blkdev(UB_MAJOR, DRV_NAME)) != 0) + goto err_regblkdev; ++ devfs_mk_dir(DEVFS_NAME); + + if ((rc = usb_register(&ub_driver)) != 0) + goto err_register; +@@ -2462,6 +2466,7 @@ + return 0; + + err_register: ++ devfs_remove(DEVFS_NAME); + unregister_blkdev(UB_MAJOR, DRV_NAME); + err_regblkdev: + return rc; +@@ -2471,6 +2476,7 @@ + { + usb_deregister(&ub_driver); + ++ devfs_remove(DEVFS_NAME); + unregister_blkdev(UB_MAJOR, DRV_NAME); + usb_usual_clear_present(USB_US_TYPE_UB); + } +diff -urN linux-2.6.19.old/drivers/block/umem.c linux-2.6.19.dev/drivers/block/umem.c +--- linux-2.6.19.old/drivers/block/umem.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/umem.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1192,6 +1192,7 @@ + for (i = 0; i < num_cards; i++) { + struct gendisk *disk = mm_gendisk[i]; + sprintf(disk->disk_name, "umem%c", 'a'+i); ++ sprintf(disk->devfs_name, "umem/card%d", i); + spin_lock_init(&cards[i].lock); + disk->major = major_nr; + disk->first_minor = i << MM_SHIFT; +diff -urN linux-2.6.19.old/drivers/block/viodasd.c linux-2.6.19.dev/drivers/block/viodasd.c +--- linux-2.6.19.old/drivers/block/viodasd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/viodasd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -59,6 +59,7 @@ + * numbers 0-255 we get a maximum of 32 disks. + */ + #define VIOD_GENHD_NAME "iseries/vd" ++#define VIOD_GENHD_DEVFS_NAME "iseries/disc" + + #define VIOD_VERS "1.64" + +@@ -522,6 +523,8 @@ + else + snprintf(g->disk_name, sizeof(g->disk_name), + VIOD_GENHD_NAME "%c", 'a' + (dev_no % 26)); ++ snprintf(g->devfs_name, sizeof(g->devfs_name), ++ "%s%d", VIOD_GENHD_DEVFS_NAME, dev_no); + g->fops = &viodasd_fops; + g->queue = q; + g->private_data = d; +diff -urN linux-2.6.19.old/drivers/block/xd.c linux-2.6.19.dev/drivers/block/xd.c +--- linux-2.6.19.old/drivers/block/xd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/xd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -215,6 +215,7 @@ + disk->major = XT_DISK_MAJOR; + disk->first_minor = i<<6; + sprintf(disk->disk_name, "xd%c", i+'a'); ++ sprintf(disk->devfs_name, "xd/target%d", i); + disk->fops = &xd_fops; + disk->private_data = p; + disk->queue = xd_queue; +diff -urN linux-2.6.19.old/drivers/block/z2ram.c linux-2.6.19.dev/drivers/block/z2ram.c +--- linux-2.6.19.old/drivers/block/z2ram.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/block/z2ram.c 2006-12-14 03:12:59.000000000 +0100 +@@ -354,6 +354,7 @@ + z2ram_gendisk->first_minor = 0; + z2ram_gendisk->fops = &z2_fops; + sprintf(z2ram_gendisk->disk_name, "z2ram"); ++ strcpy(z2ram_gendisk->devfs_name, z2ram_gendisk->disk_name); + + z2ram_gendisk->queue = z2_queue; + add_disk(z2ram_gendisk); +diff -urN linux-2.6.19.old/drivers/cdrom/aztcd.c linux-2.6.19.dev/drivers/cdrom/aztcd.c +--- linux-2.6.19.old/drivers/cdrom/aztcd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/aztcd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1918,6 +1918,7 @@ + azt_disk->first_minor = 0; + azt_disk->fops = &azt_fops; + sprintf(azt_disk->disk_name, "aztcd"); ++ sprintf(azt_disk->devfs_name, "aztcd"); + azt_disk->queue = azt_queue; + add_disk(azt_disk); + azt_invalidate_buffers(); +diff -urN linux-2.6.19.old/drivers/cdrom/cdu31a.c linux-2.6.19.dev/drivers/cdrom/cdu31a.c +--- linux-2.6.19.old/drivers/cdrom/cdu31a.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/cdu31a.c 2006-12-14 03:12:59.000000000 +0100 +@@ -161,6 +161,7 @@ + #include <linux/hdreg.h> + #include <linux/genhd.h> + #include <linux/ioport.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/string.h> + #include <linux/slab.h> + #include <linux/init.h> +diff -urN linux-2.6.19.old/drivers/cdrom/cm206.c linux-2.6.19.dev/drivers/cdrom/cm206.c +--- linux-2.6.19.old/drivers/cdrom/cm206.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/cm206.c 2006-12-14 03:12:59.000000000 +0100 +@@ -187,6 +187,7 @@ + #include <linux/interrupt.h> + #include <linux/timer.h> + #include <linux/cdrom.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/ioport.h> + #include <linux/mm.h> + #include <linux/slab.h> +diff -urN linux-2.6.19.old/drivers/cdrom/gscd.c linux-2.6.19.dev/drivers/cdrom/gscd.c +--- linux-2.6.19.old/drivers/cdrom/gscd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/gscd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -955,6 +955,7 @@ + gscd_disk->first_minor = 0; + gscd_disk->fops = &gscd_fops; + sprintf(gscd_disk->disk_name, "gscd"); ++ sprintf(gscd_disk->devfs_name, "gscd"); + + if (register_blkdev(MAJOR_NR, "gscd")) { + ret = -EIO; +diff -urN linux-2.6.19.old/drivers/cdrom/mcdx.c linux-2.6.19.dev/drivers/cdrom/mcdx.c +--- linux-2.6.19.old/drivers/cdrom/mcdx.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/mcdx.c 2006-12-14 03:12:59.000000000 +0100 +@@ -74,6 +74,7 @@ + #include <linux/major.h> + #define MAJOR_NR MITSUMI_X_CDROM_MAJOR + #include <linux/blkdev.h> ++#include <linux/devfs_fs_kernel.h> + + #include "mcdx.h" + +diff -urN linux-2.6.19.old/drivers/cdrom/optcd.c linux-2.6.19.dev/drivers/cdrom/optcd.c +--- linux-2.6.19.old/drivers/cdrom/optcd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/optcd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2033,6 +2033,7 @@ + optcd_disk->first_minor = 0; + optcd_disk->fops = &opt_fops; + sprintf(optcd_disk->disk_name, "optcd"); ++ sprintf(optcd_disk->devfs_name, "optcd"); + + if (!request_region(optcd_port, 4, "optcd")) { + printk(KERN_ERR "optcd: conflict, I/O port 0x%x already used\n", +diff -urN linux-2.6.19.old/drivers/cdrom/sbpcd.c linux-2.6.19.dev/drivers/cdrom/sbpcd.c +--- linux-2.6.19.old/drivers/cdrom/sbpcd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/sbpcd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -371,6 +371,7 @@ + #include <linux/kernel.h> + #include <linux/cdrom.h> + #include <linux/ioport.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/major.h> + #include <linux/string.h> + #include <linux/vmalloc.h> +@@ -5806,6 +5807,8 @@ + return -ENOMEM; + } + ++ devfs_mk_dir("sbp"); ++ + for (j=0;j<NR_SBPCD;j++) + { + struct cdrom_device_info * sbpcd_infop; +@@ -5867,6 +5870,7 @@ + disk->fops = &sbpcd_bdops; + strcpy(disk->disk_name, sbpcd_infop->name); + disk->flags = GENHD_FL_CD; ++ sprintf(disk->devfs_name, "sbp/c0t%d", p->drv_id); + p->disk = disk; + if (register_cdrom(sbpcd_infop)) + { +@@ -5901,6 +5905,7 @@ + if (D_S[j].drv_id==-1) continue; + del_gendisk(D_S[j].disk); + put_disk(D_S[j].disk); ++ devfs_remove("sbp/c0t%d", j); + vfree(D_S[j].sbp_buf); + if (D_S[j].sbp_audsiz>0) + vfree(D_S[j].aud_buf); +@@ -5911,6 +5916,7 @@ + } + vfree(D_S[j].sbpcd_infop); + } ++ devfs_remove("sbp"); + msg(DBG_INF, "%s module released.\n", major_name); + } + +diff -urN linux-2.6.19.old/drivers/cdrom/sjcd.c linux-2.6.19.dev/drivers/cdrom/sjcd.c +--- linux-2.6.19.old/drivers/cdrom/sjcd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/sjcd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1695,6 +1695,7 @@ + sjcd_disk->first_minor = 0, + sjcd_disk->fops = &sjcd_fops, + sprintf(sjcd_disk->disk_name, "sjcd"); ++ sprintf(sjcd_disk->devfs_name, "sjcd"); + + if (!request_region(sjcd_base, 4,"sjcd")) { + printk +diff -urN linux-2.6.19.old/drivers/cdrom/sonycd535.c linux-2.6.19.dev/drivers/cdrom/sonycd535.c +--- linux-2.6.19.old/drivers/cdrom/sonycd535.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/sonycd535.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1589,6 +1589,7 @@ + cdu_disk->first_minor = 0; + cdu_disk->fops = &cdu_fops; + sprintf(cdu_disk->disk_name, "cdu"); ++ sprintf(cdu_disk->devfs_name, "cdu535"); + + if (!request_region(sony535_cd_base_io, 4, CDU535_HANDLE)) { + printk(KERN_WARNING"sonycd535: Unable to request region 0x%x\n", +diff -urN linux-2.6.19.old/drivers/cdrom/viocd.c linux-2.6.19.dev/drivers/cdrom/viocd.c +--- linux-2.6.19.old/drivers/cdrom/viocd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/cdrom/viocd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -49,6 +49,7 @@ + #include <asm/iseries/vio.h> + + #define VIOCD_DEVICE "iseries/vcd" ++#define VIOCD_DEVICE_DEVFS "iseries/vcd" + + #define VIOCD_VERS "1.06" + +@@ -687,6 +688,8 @@ + gendisk->first_minor = deviceno; + strncpy(gendisk->disk_name, c->name, + sizeof(gendisk->disk_name)); ++ snprintf(gendisk->devfs_name, sizeof(gendisk->devfs_name), ++ VIOCD_DEVICE_DEVFS "%d", deviceno); + blk_queue_max_hw_segments(q, 1); + blk_queue_max_phys_segments(q, 1); + blk_queue_max_sectors(q, 4096 / 512); +diff -urN linux-2.6.19.old/drivers/char/cyclades.c linux-2.6.19.dev/drivers/char/cyclades.c +--- linux-2.6.19.old/drivers/char/cyclades.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/cyclades.c 2006-12-14 03:12:59.000000000 +0100 +@@ -5227,6 +5227,7 @@ + cy_serial_driver->owner = THIS_MODULE; + cy_serial_driver->driver_name = "cyclades"; + cy_serial_driver->name = "ttyC"; ++ cy_serial_driver->devfs_name = "tts/C"; + cy_serial_driver->major = CYCLADES_MAJOR; + cy_serial_driver->minor_start = 0; + cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/dsp56k.c linux-2.6.19.dev/drivers/char/dsp56k.c +--- linux-2.6.19.old/drivers/char/dsp56k.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/dsp56k.c 2006-12-14 03:12:59.000000000 +0100 +@@ -33,6 +33,7 @@ + #include <linux/fs.h> + #include <linux/mm.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + #include <linux/device.h> + +@@ -517,9 +518,17 @@ + } + class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k"); + ++ err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0), ++ S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k"); ++ if(err) ++ goto out_class; ++ + printk(banner); + goto out; + ++out_class: ++ class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0)); ++ class_destroy(dsp56k_class); + out_chrdev: + unregister_chrdev(DSP56K_MAJOR, "dsp56k"); + out: +@@ -532,6 +541,7 @@ + class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0)); + class_destroy(dsp56k_class); + unregister_chrdev(DSP56K_MAJOR, "dsp56k"); ++ devfs_remove("dsp56k"); + } + module_exit(dsp56k_cleanup_driver); + +diff -urN linux-2.6.19.old/drivers/char/dtlk.c linux-2.6.19.dev/drivers/char/dtlk.c +--- linux-2.6.19.old/drivers/char/dtlk.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/dtlk.c 2006-12-14 03:12:59.000000000 +0100 +@@ -62,6 +62,7 @@ + #include <linux/init.h> /* for __init, module_{init,exit} */ + #include <linux/poll.h> /* for POLLIN, etc. */ + #include <linux/dtlk.h> /* local header file for DoubleTalk values */ ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + + #ifdef TRACING +@@ -336,6 +337,9 @@ + if (dtlk_dev_probe() == 0) + printk(", MAJOR %d\n", dtlk_major); + ++ devfs_mk_cdev(MKDEV(dtlk_major, DTLK_MINOR), ++ S_IFCHR | S_IRUSR | S_IWUSR, "dtlk"); ++ + init_timer(&dtlk_timer); + dtlk_timer.function = dtlk_timer_tick; + init_waitqueue_head(&dtlk_process_list); +@@ -353,6 +357,7 @@ + + dtlk_write_tts(DTLK_CLEAR); + unregister_chrdev(dtlk_major, "dtlk"); ++ devfs_remove("dtlk"); + release_region(dtlk_port_lpc, DTLK_IO_EXTENT); + } + +diff -urN linux-2.6.19.old/drivers/char/epca.c linux-2.6.19.dev/drivers/char/epca.c +--- linux-2.6.19.old/drivers/char/epca.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/epca.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1227,6 +1227,7 @@ + + pc_driver->owner = THIS_MODULE; + pc_driver->name = "ttyD"; ++ pc_driver->devfs_name = "tts/D"; + pc_driver->major = DIGI_MAJOR; + pc_driver->minor_start = 0; + pc_driver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/esp.c linux-2.6.19.dev/drivers/char/esp.c +--- linux-2.6.19.old/drivers/char/esp.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/esp.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2448,6 +2448,7 @@ + + esp_driver->owner = THIS_MODULE; + esp_driver->name = "ttyP"; ++ esp_driver->devfs_name = "tts/P"; + esp_driver->major = ESP_IN_MAJOR; + esp_driver->minor_start = 0; + esp_driver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/ftape/zftape/zftape-init.c linux-2.6.19.dev/drivers/char/ftape/zftape/zftape-init.c +--- linux-2.6.19.old/drivers/char/ftape/zftape/zftape-init.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/ftape/zftape/zftape-init.c 2006-12-14 03:12:59.000000000 +0100 +@@ -32,6 +32,7 @@ + #endif + #include <linux/fcntl.h> + #include <linux/smp_lock.h> ++#include <linux/devfs_fs_kernel.h> + + #include <linux/zftape.h> + #include <linux/init.h> +@@ -330,11 +331,29 @@ + zft_class = class_create(THIS_MODULE, "zft"); + for (i = 0; i < 4; i++) { + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i), NULL, "qft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "qft%i", i); + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 4), NULL, "nqft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 4), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "nqft%i", i); + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 16), NULL, "zqft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 16), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "zqft%i", i); + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 20), NULL, "nzqft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 20), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "nzqft%i", i); + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 32), NULL, "rawqft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 32), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "rawqft%i", i); + class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 36), NULL, "nrawrawqft%i", i); ++ devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 36), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "nrawqft%i", i); + } + + #ifdef CONFIG_ZFT_COMPRESSOR +@@ -360,11 +379,17 @@ + TRACE(ft_t_info, "successful"); + } + for (i = 0; i < 4; i++) { ++ devfs_remove("qft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i)); ++ devfs_remove("nqft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 4)); ++ devfs_remove("zqft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 16)); ++ devfs_remove("nzqft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 20)); ++ devfs_remove("rawqft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 32)); ++ devfs_remove("nrawqft%i", i); + class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 36)); + } + class_destroy(zft_class); +diff -urN linux-2.6.19.old/drivers/char/hvc_console.c linux-2.6.19.dev/drivers/char/hvc_console.c +--- linux-2.6.19.old/drivers/char/hvc_console.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/hvc_console.c 2006-12-14 03:12:59.000000000 +0100 +@@ -822,6 +822,7 @@ + return -ENOMEM; + + drv->owner = THIS_MODULE; ++ drv->devfs_name = "hvc/"; + drv->driver_name = "hvc"; + drv->name = "hvc"; + drv->major = HVC_MAJOR; +diff -urN linux-2.6.19.old/drivers/char/hvcs.c linux-2.6.19.dev/drivers/char/hvcs.c +--- linux-2.6.19.old/drivers/char/hvcs.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/hvcs.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1361,6 +1361,7 @@ + + hvcs_tty_driver->driver_name = hvcs_driver_name; + hvcs_tty_driver->name = hvcs_device_node; ++ hvcs_tty_driver->devfs_name = hvcs_device_node; + + /* + * We'll let the system assign us a major number, indicated by leaving +diff -urN linux-2.6.19.old/drivers/char/hvsi.c linux-2.6.19.dev/drivers/char/hvsi.c +--- linux-2.6.19.old/drivers/char/hvsi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/hvsi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1152,6 +1152,7 @@ + return -ENOMEM; + + hvsi_driver->owner = THIS_MODULE; ++ hvsi_driver->devfs_name = "hvsi/"; + hvsi_driver->driver_name = "hvsi"; + hvsi_driver->name = "hvsi"; + hvsi_driver->major = HVSI_MAJOR; +diff -urN linux-2.6.19.old/drivers/char/ip2/ip2main.c linux-2.6.19.dev/drivers/char/ip2/ip2main.c +--- linux-2.6.19.old/drivers/char/ip2/ip2main.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/ip2/ip2main.c 2006-12-14 03:12:59.000000000 +0100 +@@ -90,6 +90,7 @@ + #include <linux/module.h> + #include <linux/signal.h> + #include <linux/sched.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/timer.h> + #include <linux/interrupt.h> + #include <linux/pci.h> +@@ -412,7 +413,9 @@ + /* free io addresses and Tibet */ + release_region( ip2config.addr[i], 8 ); + class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i)); ++ devfs_remove("ip2/ipl%d", i); + class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1)); ++ devfs_remove("ip2/stat%d", i); + } + /* Disable and remove interrupt handler. */ + if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) { +@@ -421,6 +424,7 @@ + } + } + class_destroy(ip2_class); ++ devfs_remove("ip2"); + if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) { + printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err); + } +@@ -674,6 +678,7 @@ + + ip2_tty_driver->owner = THIS_MODULE; + ip2_tty_driver->name = "ttyF"; ++ ip2_tty_driver->devfs_name = "tts/F"; + ip2_tty_driver->driver_name = pcDriver_name; + ip2_tty_driver->major = IP2_TTY_MAJOR; + ip2_tty_driver->minor_start = 0; +@@ -722,9 +727,26 @@ + class_device_create(ip2_class, NULL, + MKDEV(IP2_IPL_MAJOR, 4 * i), + NULL, "ipl%d", i); ++ err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i), ++ S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, ++ "ip2/ipl%d", i); ++ if (err) { ++ class_device_destroy(ip2_class, ++ MKDEV(IP2_IPL_MAJOR, 4 * i)); ++ goto out_class; ++ } ++ + class_device_create(ip2_class, NULL, + MKDEV(IP2_IPL_MAJOR, 4 * i + 1), + NULL, "stat%d", i); ++ err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1), ++ S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, ++ "ip2/stat%d", i); ++ if (err) { ++ class_device_destroy(ip2_class, ++ MKDEV(IP2_IPL_MAJOR, 4 * i + 1)); ++ goto out_class; ++ } + + for ( box = 0; box < ABS_MAX_BOXES; ++box ) + { +diff -urN linux-2.6.19.old/drivers/char/ipmi/ipmi_devintf.c linux-2.6.19.dev/drivers/char/ipmi/ipmi_devintf.c +--- linux-2.6.19.old/drivers/char/ipmi/ipmi_devintf.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/ipmi/ipmi_devintf.c 2006-12-14 03:12:59.000000000 +0100 +@@ -39,6 +39,7 @@ + #include <linux/poll.h> + #include <linux/spinlock.h> + #include <linux/slab.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/ipmi.h> + #include <linux/mutex.h> + #include <linux/init.h> +@@ -832,6 +833,9 @@ + dev_t dev = MKDEV(ipmi_major, if_num); + struct ipmi_reg_list *entry; + ++ devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR, ++ "ipmidev/%d", if_num); ++ + entry = kmalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) { + printk(KERN_ERR "ipmi_devintf: Unable to create the" +@@ -861,6 +865,7 @@ + } + class_device_destroy(ipmi_class, dev); + mutex_unlock(®_list_mutex); ++ devfs_remove("ipmidev/%d", if_num); + } + + static struct ipmi_smi_watcher smi_watcher = +@@ -896,6 +901,8 @@ + ipmi_major = rv; + } + ++ devfs_mk_dir(DEVICE_NAME); ++ + rv = ipmi_smi_watcher_register(&smi_watcher); + if (rv) { + unregister_chrdev(ipmi_major, DEVICE_NAME); +@@ -920,6 +927,7 @@ + mutex_unlock(®_list_mutex); + class_destroy(ipmi_class); + ipmi_smi_watcher_unregister(&smi_watcher); ++ devfs_remove(DEVICE_NAME); + unregister_chrdev(ipmi_major, DEVICE_NAME); + } + module_exit(cleanup_ipmi); +diff -urN linux-2.6.19.old/drivers/char/isicom.c linux-2.6.19.dev/drivers/char/isicom.c +--- linux-2.6.19.old/drivers/char/isicom.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/isicom.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1582,6 +1582,7 @@ + + isicom_normal->owner = THIS_MODULE; + isicom_normal->name = "ttyM"; ++ isicom_normal->devfs_name = "isicom/"; + isicom_normal->major = ISICOM_NMAJOR; + isicom_normal->minor_start = 0; + isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/lp.c linux-2.6.19.dev/drivers/char/lp.c +--- linux-2.6.19.old/drivers/char/lp.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/lp.c 2006-12-14 03:12:59.000000000 +0100 +@@ -119,6 +119,7 @@ + #include <linux/major.h> + #include <linux/sched.h> + #include <linux/smp_lock.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/slab.h> + #include <linux/fcntl.h> + #include <linux/delay.h> +@@ -805,6 +806,8 @@ + + class_device_create(lp_class, NULL, MKDEV(LP_MAJOR, nr), NULL, + "lp%d", nr); ++ devfs_mk_cdev(MKDEV(LP_MAJOR, nr), S_IFCHR | S_IRUGO | S_IWUGO, ++ "printers/%d", nr); + + printk(KERN_INFO "lp%d: using %s (%s).\n", nr, port->name, + (port->irq == PARPORT_IRQ_NONE)?"polling":"interrupt-driven"); +@@ -903,6 +906,7 @@ + return -EIO; + } + ++ devfs_mk_dir("printers"); + lp_class = class_create(THIS_MODULE, "printer"); + if (IS_ERR(lp_class)) { + err = PTR_ERR(lp_class); +@@ -928,6 +932,7 @@ + out_class: + class_destroy(lp_class); + out_reg: ++ devfs_remove("printers"); + unregister_chrdev(LP_MAJOR, "lp"); + return err; + } +@@ -975,8 +980,10 @@ + if (lp_table[offset].dev == NULL) + continue; + parport_unregister_device(lp_table[offset].dev); ++ devfs_remove("printers/%d", offset); + class_device_destroy(lp_class, MKDEV(LP_MAJOR, offset)); + } ++ devfs_remove("printers"); + class_destroy(lp_class); + } + +diff -urN linux-2.6.19.old/drivers/char/mem.c linux-2.6.19.dev/drivers/char/mem.c +--- linux-2.6.19.old/drivers/char/mem.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/mem.c 2006-12-14 03:12:59.000000000 +0100 +@@ -19,6 +19,7 @@ + #include <linux/tty.h> + #include <linux/capability.h> + #include <linux/smp_lock.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/ptrace.h> + #include <linux/device.h> + #include <linux/highmem.h> +@@ -979,10 +980,13 @@ + printk("unable to get major %d for memory devs\n", MEM_MAJOR); + + mem_class = class_create(THIS_MODULE, "mem"); +- for (i = 0; i < ARRAY_SIZE(devlist); i++) ++ for (i = 0; i < ARRAY_SIZE(devlist); i++) { + class_device_create(mem_class, NULL, + MKDEV(MEM_MAJOR, devlist[i].minor), + NULL, devlist[i].name); ++ devfs_mk_cdev(MKDEV(MEM_MAJOR, devlist[i].minor), ++ S_IFCHR | devlist[i].mode, devlist[i].name); ++ } + + return 0; + } +diff -urN linux-2.6.19.old/drivers/char/misc.c linux-2.6.19.dev/drivers/char/misc.c +--- linux-2.6.19.old/drivers/char/misc.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/misc.c 2006-12-14 03:12:59.000000000 +0100 +@@ -43,6 +43,7 @@ + #include <linux/slab.h> + #include <linux/proc_fs.h> + #include <linux/seq_file.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/stat.h> + #include <linux/init.h> + #include <linux/device.h> +@@ -226,6 +227,10 @@ + + if (misc->minor < DYNAMIC_MINORS) + misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7); ++ if (misc->devfs_name[0] == '\0') { ++ snprintf(misc->devfs_name, sizeof(misc->devfs_name), ++ "misc/%s", misc->name); ++ } + dev = MKDEV(MISC_MAJOR, misc->minor); + + misc->class = class_device_create(misc_class, NULL, dev, misc->dev, +@@ -235,6 +240,13 @@ + goto out; + } + ++ err = devfs_mk_cdev(dev, S_IFCHR|S_IRUSR|S_IWUSR|S_IRGRP, ++ misc->devfs_name); ++ if (err) { ++ class_device_destroy(misc_class, dev); ++ goto out; ++ } ++ + /* + * Add it to the front, so that later devices can "override" + * earlier defaults +@@ -265,6 +277,7 @@ + down(&misc_sem); + list_del(&misc->list); + class_device_destroy(misc_class, MKDEV(MISC_MAJOR, misc->minor)); ++ devfs_remove(misc->devfs_name); + if (i < DYNAMIC_MINORS && i>0) { + misc_minors[i>>3] &= ~(1 << (misc->minor & 7)); + } +diff -urN linux-2.6.19.old/drivers/char/mmtimer.c linux-2.6.19.dev/drivers/char/mmtimer.c +--- linux-2.6.19.old/drivers/char/mmtimer.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/mmtimer.c 2006-12-14 03:12:59.000000000 +0100 +@@ -25,6 +25,7 @@ + #include <linux/init.h> + #include <linux/errno.h> + #include <linux/mm.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/mmtimer.h> + #include <linux/miscdevice.h> + #include <linux/posix-timers.h> +@@ -692,6 +693,7 @@ + return -1; + } + ++ strcpy(mmtimer_miscdev.devfs_name, MMTIMER_NAME); + if (misc_register(&mmtimer_miscdev)) { + printk(KERN_ERR "%s: failed to register device\n", + MMTIMER_NAME); +diff -urN linux-2.6.19.old/drivers/char/moxa.c linux-2.6.19.dev/drivers/char/moxa.c +--- linux-2.6.19.old/drivers/char/moxa.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/moxa.c 2006-12-14 03:12:59.000000000 +0100 +@@ -346,6 +346,7 @@ + init_MUTEX(&moxaBuffSem); + moxaDriver->owner = THIS_MODULE; + moxaDriver->name = "ttyMX"; ++ moxaDriver->devfs_name = "tts/a"; + moxaDriver->major = ttymajor; + moxaDriver->minor_start = 0; + moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/ppdev.c linux-2.6.19.dev/drivers/char/ppdev.c +--- linux-2.6.19.old/drivers/char/ppdev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/ppdev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -60,6 +60,7 @@ + #include <linux/init.h> + #include <linux/sched.h> + #include <linux/device.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/ioctl.h> + #include <linux/parport.h> + #include <linux/ctype.h> +@@ -781,6 +782,11 @@ + err = PTR_ERR(ppdev_class); + goto out_chrdev; + } ++ devfs_mk_dir("parports"); ++ for (i = 0; i < PARPORT_MAX; i++) { ++ devfs_mk_cdev(MKDEV(PP_MAJOR, i), ++ S_IFCHR | S_IRUGO | S_IWUGO, "parports/%d", i); ++ } + if (parport_register_driver(&pp_driver)) { + printk (KERN_WARNING CHRDEV ": unable to register with parport\n"); + goto out_class; +@@ -790,6 +796,9 @@ + goto out; + + out_class: ++ for (i = 0; i < PARPORT_MAX; i++) ++ devfs_remove("parports/%d", i); ++ devfs_remove("parports"); + class_destroy(ppdev_class); + out_chrdev: + unregister_chrdev(PP_MAJOR, CHRDEV); +@@ -799,8 +808,12 @@ + + static void __exit ppdev_cleanup (void) + { ++ int i; + /* Clean up all parport stuff */ ++ for (i = 0; i < PARPORT_MAX; i++) ++ devfs_remove("parports/%d", i); + parport_unregister_driver(&pp_driver); ++ devfs_remove("parports"); + class_destroy(ppdev_class); + unregister_chrdev (PP_MAJOR, CHRDEV); + } +diff -urN linux-2.6.19.old/drivers/char/pty.c linux-2.6.19.dev/drivers/char/pty.c +--- linux-2.6.19.old/drivers/char/pty.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/pty.c 2006-12-14 03:12:59.000000000 +0100 +@@ -23,6 +23,7 @@ + #include <linux/major.h> + #include <linux/mm.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/sysctl.h> + + #include <asm/uaccess.h> +@@ -263,6 +264,7 @@ + pty_driver->owner = THIS_MODULE; + pty_driver->driver_name = "pty_master"; + pty_driver->name = "pty"; ++ pty_driver->devfs_name = "pty/m"; + pty_driver->major = PTY_MASTER_MAJOR; + pty_driver->minor_start = 0; + pty_driver->type = TTY_DRIVER_TYPE_PTY; +@@ -280,6 +282,7 @@ + pty_slave_driver->owner = THIS_MODULE; + pty_slave_driver->driver_name = "pty_slave"; + pty_slave_driver->name = "ttyp"; ++ pty_slave_driver->devfs_name = "pty/s"; + pty_slave_driver->major = PTY_SLAVE_MAJOR; + pty_slave_driver->minor_start = 0; + pty_slave_driver->type = TTY_DRIVER_TYPE_PTY; +@@ -347,6 +350,7 @@ + + static void __init unix98_pty_init(void) + { ++ devfs_mk_dir("pts"); + ptm_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX); + if (!ptm_driver) + panic("Couldn't allocate Unix98 ptm driver"); +diff -urN linux-2.6.19.old/drivers/char/raw.c linux-2.6.19.dev/drivers/char/raw.c +--- linux-2.6.19.old/drivers/char/raw.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/raw.c 2006-12-14 03:12:59.000000000 +0100 +@@ -10,6 +10,7 @@ + + #include <linux/init.h> + #include <linux/fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/major.h> + #include <linux/blkdev.h> + #include <linux/module.h> +@@ -285,6 +286,13 @@ + } + class_device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl"); + ++ devfs_mk_cdev(MKDEV(RAW_MAJOR, 0), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "raw/rawctl"); ++ for (i = 1; i < MAX_RAW_MINORS; i++) ++ devfs_mk_cdev(MKDEV(RAW_MAJOR, i), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "raw/raw%d", i); + return 0; + + error_region: +@@ -295,6 +303,12 @@ + + static void __exit raw_exit(void) + { ++ int i; ++ ++ for (i = 1; i < MAX_RAW_MINORS; i++) ++ devfs_remove("raw/raw%d", i); ++ devfs_remove("raw/rawctl"); ++ devfs_remove("raw"); + class_device_destroy(raw_class, MKDEV(RAW_MAJOR, 0)); + class_destroy(raw_class); + cdev_del(&raw_cdev); +diff -urN linux-2.6.19.old/drivers/char/riscom8.c linux-2.6.19.dev/drivers/char/riscom8.c +--- linux-2.6.19.old/drivers/char/riscom8.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/riscom8.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1613,6 +1613,7 @@ + memset(IRQ_to_board, 0, sizeof(IRQ_to_board)); + riscom_driver->owner = THIS_MODULE; + riscom_driver->name = "ttyL"; ++ riscom_driver->devfs_name = "tts/L"; + riscom_driver->major = RISCOM8_NORMAL_MAJOR; + riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; + riscom_driver->subtype = SERIAL_TYPE_NORMAL; +diff -urN linux-2.6.19.old/drivers/char/rocket.c linux-2.6.19.dev/drivers/char/rocket.c +--- linux-2.6.19.old/drivers/char/rocket.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/rocket.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2426,7 +2426,8 @@ + */ + + rocket_driver->owner = THIS_MODULE; +- rocket_driver->flags = TTY_DRIVER_DYNAMIC_DEV; ++ rocket_driver->flags = TTY_DRIVER_NO_DEVFS; ++ rocket_driver->devfs_name = "tts/R"; + rocket_driver->name = "ttyR"; + rocket_driver->driver_name = "Comtrol RocketPort"; + rocket_driver->major = TTY_ROCKET_MAJOR; +@@ -2437,7 +2438,7 @@ + rocket_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + #ifdef ROCKET_SOFT_FLOW +- rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + #endif + tty_set_operations(rocket_driver, &rocket_ops); + +diff -urN linux-2.6.19.old/drivers/char/serial167.c linux-2.6.19.dev/drivers/char/serial167.c +--- linux-2.6.19.old/drivers/char/serial167.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/serial167.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2218,6 +2218,7 @@ + /* Initialize the tty_driver structure */ + + cy_serial_driver->owner = THIS_MODULE; ++ cy_serial_driver->devfs_name = "tts/"; + cy_serial_driver->name = "ttyS"; + cy_serial_driver->major = TTY_MAJOR; + cy_serial_driver->minor_start = 64; +diff -urN linux-2.6.19.old/drivers/char/stallion.c linux-2.6.19.dev/drivers/char/stallion.c +--- linux-2.6.19.old/drivers/char/stallion.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/stallion.c 2006-12-14 03:12:59.000000000 +0100 +@@ -39,6 +39,7 @@ + #include <linux/ioport.h> + #include <linux/init.h> + #include <linux/smp_lock.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/device.h> + #include <linux/delay.h> + +@@ -753,15 +754,21 @@ + if (i) { + printk("STALLION: failed to un-register tty driver, " + "errno=%d\n", -i); ++ restore_flags(flags); + return; + } +- for (i = 0; i < 4; i++) ++ for (i = 0; i < 4; i++) { ++ devfs_remove("staliomem/%d", i); + class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); ++ } ++ devfs_remove("staliomem"); + if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) + printk("STALLION: failed to un-register serial memory device, " + "errno=%d\n", -i); + class_destroy(stallion_class); + ++ kfree(stl_tmpwritebuf); ++ + for (i = 0; (i < stl_nrbrds); i++) { + if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) + continue; +@@ -3033,21 +3040,35 @@ + return -1; + + /* ++ * Allocate a temporary write buffer. ++ */ ++ stl_tmpwritebuf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); ++ if (!stl_tmpwritebuf) ++ printk("STALLION: failed to allocate memory (size=%d)\n", ++ STL_TXBUFSIZE); ++ ++/* + * Set up a character driver for per board stuff. This is mainly used + * to do stats ioctls on the ports. + */ + if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) + printk("STALLION: failed to register serial board device\n"); ++ devfs_mk_dir("staliomem"); + + stallion_class = class_create(THIS_MODULE, "staliomem"); +- for (i = 0; i < 4; i++) ++ for (i = 0; i < 4; i++) { ++ devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i), ++ S_IFCHR|S_IRUSR|S_IWUSR, ++ "staliomem/%d", i); + class_device_create(stallion_class, NULL, + MKDEV(STL_SIOMEMMAJOR, i), NULL, + "staliomem%d", i); ++ } + + stl_serial->owner = THIS_MODULE; + stl_serial->driver_name = stl_drvname; + stl_serial->name = "ttyE"; ++ stl_serial->devfs_name = "tts/E"; + stl_serial->major = STL_SERIALMAJOR; + stl_serial->minor_start = 0; + stl_serial->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/tipar.c linux-2.6.19.dev/drivers/char/tipar.c +--- linux-2.6.19.old/drivers/char/tipar.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/tipar.c 2006-12-14 03:12:59.000000000 +0100 +@@ -55,6 +55,7 @@ + #include <linux/ioport.h> + #include <asm/io.h> + #include <linux/bitops.h> ++#include <linux/devfs_fs_kernel.h> /* DevFs support */ + #include <linux/parport.h> /* Our code depend on parport */ + #include <linux/device.h> + +@@ -443,6 +444,12 @@ + + class_device_create(tipar_class, NULL, MKDEV(TIPAR_MAJOR, + TIPAR_MINOR + nr), NULL, "par%d", nr); ++ /* Use devfs, tree: /dev/ticables/par/[0..2] */ ++ err = devfs_mk_cdev(MKDEV(TIPAR_MAJOR, TIPAR_MINOR + nr), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "ticables/par/%d", nr); ++ if (err) ++ goto out_class; + + /* Display informations */ + pr_info("tipar%d: using %s (%s)\n", nr, port->name, (port->irq == +@@ -497,6 +504,9 @@ + goto out; + } + ++ /* Use devfs with tree: /dev/ticables/par/[0..2] */ ++ devfs_mk_dir("ticables/par"); ++ + tipar_class = class_create(THIS_MODULE, "ticables"); + if (IS_ERR(tipar_class)) { + err = PTR_ERR(tipar_class); +@@ -515,6 +525,7 @@ + class_destroy(tipar_class); + + out_chrdev: ++ devfs_remove("ticables/par"); + unregister_chrdev(TIPAR_MAJOR, "tipar"); + out: + return err; +@@ -535,8 +546,10 @@ + continue; + parport_unregister_device(table[i].dev); + class_device_destroy(tipar_class, MKDEV(TIPAR_MAJOR, i)); ++ devfs_remove("ticables/par/%d", i); + } + class_destroy(tipar_class); ++ devfs_remove("ticables/par"); + + pr_info("tipar: module unloaded\n"); + } +diff -urN linux-2.6.19.old/drivers/char/tty_io.c linux-2.6.19.dev/drivers/char/tty_io.c +--- linux-2.6.19.old/drivers/char/tty_io.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/tty_io.c 2006-12-14 03:12:59.000000000 +0100 +@@ -101,6 +101,7 @@ + #include <linux/kbd_kern.h> + #include <linux/vt_kern.h> + #include <linux/selection.h> ++#include <linux/devfs_fs_kernel.h> + + #include <linux/kmod.h> + +@@ -3634,6 +3635,9 @@ + return ERR_PTR(-EINVAL); + } + ++ devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR, ++ "%s%d", driver->devfs_name, index + driver->name_base); ++ + if (driver->type == TTY_DRIVER_TYPE_PTY) + pty_line_name(driver, index, name); + else +@@ -3655,6 +3659,7 @@ + + void tty_unregister_device(struct tty_driver *driver, unsigned index) + { ++ devfs_remove("%s%d", driver->devfs_name, index + driver->name_base); + class_device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index); + } + +@@ -3776,7 +3781,7 @@ + + list_add(&driver->tty_drivers, &tty_drivers); + +- if ( !(driver->flags & TTY_DRIVER_DYNAMIC_DEV) ) { ++ if ( !(driver->flags & TTY_DRIVER_NO_DEVFS) ) { + for(i = 0; i < driver->num; i++) + tty_register_device(driver, i, NULL); + } +@@ -3819,7 +3824,7 @@ + driver->termios_locked[i] = NULL; + kfree(tp); + } +- if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) ++ if (!(driver->flags & TTY_DRIVER_NO_DEVFS)) + tty_unregister_device(driver, i); + } + p = driver->ttys; +@@ -3895,12 +3900,14 @@ + if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) || + register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0) + panic("Couldn't register /dev/tty driver\n"); ++ devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 0), S_IFCHR|S_IRUGO|S_IWUGO, "tty"); + class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty"); + + cdev_init(&console_cdev, &console_fops); + if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) || + register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0) + panic("Couldn't register /dev/console driver\n"); ++ devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 1), S_IFCHR|S_IRUSR|S_IWUSR, "console"); + class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL, "console"); + + #ifdef CONFIG_UNIX98_PTYS +@@ -3908,6 +3915,7 @@ + if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) || + register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0) + panic("Couldn't register /dev/ptmx driver\n"); ++ devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 2), S_IFCHR|S_IRUGO|S_IWUGO, "ptmx"); + class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx"); + #endif + +@@ -3916,6 +3924,7 @@ + if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || + register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) + panic("Couldn't register /dev/tty0 driver\n"); ++ devfs_mk_cdev(MKDEV(TTY_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vc/0"); + class_device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); + + vty_init(); +diff -urN linux-2.6.19.old/drivers/char/vc_screen.c linux-2.6.19.dev/drivers/char/vc_screen.c +--- linux-2.6.19.old/drivers/char/vc_screen.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/vc_screen.c 2006-12-14 03:12:59.000000000 +0100 +@@ -25,6 +25,7 @@ + #include <linux/major.h> + #include <linux/errno.h> + #include <linux/tty.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/sched.h> + #include <linux/interrupt.h> + #include <linux/mm.h> +@@ -476,6 +477,12 @@ + + void vcs_make_sysfs(struct tty_struct *tty) + { ++ devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 1), ++ S_IFCHR|S_IRUSR|S_IWUSR, ++ "vcc/%u", tty->index + 1); ++ devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 129), ++ S_IFCHR|S_IRUSR|S_IWUSR, ++ "vcc/a%u", tty->index + 1); + class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 1), + NULL, "vcs%u", tty->index + 1); + class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 129), +@@ -484,6 +491,8 @@ + + void vcs_remove_sysfs(struct tty_struct *tty) + { ++ devfs_remove("vcc/%u", tty->index + 1); ++ devfs_remove("vcc/a%u", tty->index + 1); + class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 1)); + class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 129)); + } +@@ -494,6 +503,8 @@ + panic("unable to get major %d for vcs device", VCS_MAJOR); + vc_class = class_create(THIS_MODULE, "vc"); + ++ devfs_mk_cdev(MKDEV(VCS_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/0"); ++ devfs_mk_cdev(MKDEV(VCS_MAJOR, 128), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/a0"); + class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs"); + class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa"); + return 0; +diff -urN linux-2.6.19.old/drivers/char/viocons.c linux-2.6.19.dev/drivers/char/viocons.c +--- linux-2.6.19.old/drivers/char/viocons.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/viocons.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1121,6 +1121,7 @@ + viotty_driver = alloc_tty_driver(VTTY_PORTS); + viotty_driver->owner = THIS_MODULE; + viotty_driver->driver_name = "vioconsole"; ++ viotty_driver->devfs_name = "vcs/"; + viotty_driver->name = "tty"; + viotty_driver->name_base = 1; + viotty_driver->major = TTY_MAJOR; +diff -urN linux-2.6.19.old/drivers/char/viotape.c linux-2.6.19.dev/drivers/char/viotape.c +--- linux-2.6.19.old/drivers/char/viotape.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/viotape.c 2006-12-14 03:12:59.000000000 +0100 +@@ -42,6 +42,7 @@ + #include <linux/dma-mapping.h> + #include <linux/fs.h> + #include <linux/cdev.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/major.h> + #include <linux/completion.h> + #include <linux/proc_fs.h> +@@ -942,6 +943,7 @@ + { + int i = vdev->unit_address; + int j; ++ char tapename[16]; + + if (i >= viotape_numdev) + return -ENODEV; +@@ -955,6 +957,12 @@ + "iseries!vt%d", i); + class_device_create(tape_class, NULL, MKDEV(VIOTAPE_MAJOR, i | 0x80), + NULL, "iseries!nvt%d", i); ++ devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i), S_IFCHR | S_IRUSR | S_IWUSR, ++ "iseries/vt%d", i); ++ devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i | 0x80), ++ S_IFCHR | S_IRUSR | S_IWUSR, "iseries/nvt%d", i); ++ sprintf(tapename, "iseries/vt%d", i); ++ state[i].dev_handle = devfs_register_tape(tapename); + printk(VIOTAPE_KERN_INFO "tape iseries/vt%d is iSeries " + "resource %10.10s type %4.4s, model %3.3s\n", + i, viotape_unitinfo[i].rsrcname, +@@ -966,6 +974,9 @@ + { + int i = vdev->unit_address; + ++ devfs_remove("iseries/nvt%d", i); ++ devfs_remove("iseries/vt%d", i); ++ devfs_unregister_tape(state[i].dev_handle); + class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i | 0x80)); + class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i)); + return 0; +diff -urN linux-2.6.19.old/drivers/char/vme_scc.c linux-2.6.19.dev/drivers/char/vme_scc.c +--- linux-2.6.19.old/drivers/char/vme_scc.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/vme_scc.c 2006-12-14 03:12:59.000000000 +0100 +@@ -146,6 +146,7 @@ + scc_driver->owner = THIS_MODULE; + scc_driver->driver_name = "scc"; + scc_driver->name = "ttyS"; ++ scc_driver->devfs_name = "tts/"; + scc_driver->major = TTY_MAJOR; + scc_driver->minor_start = SCC_MINOR_BASE; + scc_driver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/drivers/char/vt.c linux-2.6.19.dev/drivers/char/vt.c +--- linux-2.6.19.old/drivers/char/vt.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/char/vt.c 2006-12-14 03:12:59.000000000 +0100 +@@ -86,6 +86,7 @@ + #include <linux/mm.h> + #include <linux/console.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/vt_kern.h> + #include <linux/selection.h> + #include <linux/tiocl.h> +@@ -2691,6 +2692,7 @@ + if (!console_driver) + panic("Couldn't allocate console driver\n"); + console_driver->owner = THIS_MODULE; ++ console_driver->devfs_name = "vc/"; + console_driver->name = "tty"; + console_driver->name_base = 1; + console_driver->major = TTY_MAJOR; +diff -urN linux-2.6.19.old/drivers/ide/ide.c linux-2.6.19.dev/drivers/ide/ide.c +--- linux-2.6.19.old/drivers/ide/ide.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide.c 2006-12-14 03:12:59.000000000 +0100 +@@ -146,6 +146,7 @@ + #include <linux/pci.h> + #include <linux/delay.h> + #include <linux/ide.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/completion.h> + #include <linux/reboot.h> + #include <linux/cdrom.h> +@@ -591,8 +592,13 @@ + goto abort; + for (unit = 0; unit < MAX_DRIVES; ++unit) { + drive = &hwif->drives[unit]; +- if (!drive->present) ++ if (!drive->present) { ++ if (drive->devfs_name[0] != '\0') { ++ devfs_remove(drive->devfs_name); ++ drive->devfs_name[0] = '\0'; ++ } + continue; ++ } + spin_unlock_irq(&ide_lock); + device_unregister(&drive->gendev); + wait_for_completion(&drive->gendev_rel_comp); +@@ -2005,6 +2011,7 @@ + int ret; + + printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); ++ devfs_mk_dir("ide"); + system_bus_speed = ide_system_bus_speed(); + + ret = bus_register(&ide_bus_type); +@@ -2086,6 +2093,7 @@ + #ifdef CONFIG_PROC_FS + proc_ide_destroy(); + #endif ++ devfs_remove("ide"); + + bus_unregister(&ide_bus_type); + } +diff -urN linux-2.6.19.old/drivers/ide/ide-cd.c linux-2.6.19.dev/drivers/ide/ide-cd.c +--- linux-2.6.19.old/drivers/ide/ide-cd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide-cd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -3528,6 +3528,8 @@ + drive->driver_data = info; + + g->minors = 1; ++ snprintf(g->devfs_name, sizeof(g->devfs_name), ++ "%s/cd", drive->devfs_name); + g->driverfs_dev = &drive->gendev; + g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; + if (ide_cdrom_setup(drive)) { +diff -urN linux-2.6.19.old/drivers/ide/ide-disk.c linux-2.6.19.dev/drivers/ide/ide-disk.c +--- linux-2.6.19.old/drivers/ide/ide-disk.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide-disk.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1018,6 +1018,7 @@ + struct gendisk *g = idkp->disk; + + drive->driver_data = NULL; ++ drive->devfs_name[0] = '\0'; + g->private_data = NULL; + put_disk(g); + kfree(idkp); +@@ -1221,6 +1222,7 @@ + drive->attach = 1; + + g->minors = 1 << PARTN_BITS; ++ strcpy(g->devfs_name, drive->devfs_name); + g->driverfs_dev = &drive->gendev; + g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; + set_capacity(g, idedisk_capacity(drive)); +diff -urN linux-2.6.19.old/drivers/ide/ide-floppy.c linux-2.6.19.dev/drivers/ide/ide-floppy.c +--- linux-2.6.19.old/drivers/ide/ide-floppy.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide-floppy.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2174,6 +2174,7 @@ + + g->minors = 1 << PARTN_BITS; + g->driverfs_dev = &drive->gendev; ++ strcpy(g->devfs_name, drive->devfs_name); + g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; + g->fops = &idefloppy_ops; + drive->attach = 1; +diff -urN linux-2.6.19.old/drivers/ide/ide-probe.c linux-2.6.19.dev/drivers/ide/ide-probe.c +--- linux-2.6.19.old/drivers/ide/ide-probe.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide-probe.c 2006-12-14 03:12:59.000000000 +0100 +@@ -46,6 +46,7 @@ + #include <linux/slab.h> + #include <linux/delay.h> + #include <linux/ide.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/spinlock.h> + #include <linux/kmod.h> + #include <linux/pci.h> +@@ -1288,6 +1289,10 @@ + ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); + + spin_lock_irq(&ide_lock); ++ if (drive->devfs_name[0] != '\0') { ++ devfs_remove(drive->devfs_name); ++ drive->devfs_name[0] = '\0'; ++ } + ide_remove_drive_from_hwgroup(drive); + kfree(drive->id); + drive->id = NULL; +@@ -1321,6 +1326,12 @@ + drive->gendev.bus = &ide_bus_type; + drive->gendev.driver_data = drive; + drive->gendev.release = drive_release_dev; ++ if (drive->present) { ++ sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d", ++ (hwif->channel && hwif->mate) ? ++ hwif->mate->index : hwif->index, ++ hwif->channel, unit, drive->lun); ++ } + } + blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, + THIS_MODULE, ata_probe, ata_lock, hwif); +diff -urN linux-2.6.19.old/drivers/ide/ide-tape.c linux-2.6.19.dev/drivers/ide/ide-tape.c +--- linux-2.6.19.old/drivers/ide/ide-tape.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ide/ide-tape.c 2006-12-14 03:12:59.000000000 +0100 +@@ -434,6 +434,7 @@ + #include <linux/interrupt.h> + #include <linux/jiffies.h> + #include <linux/major.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/errno.h> + #include <linux/genhd.h> + #include <linux/slab.h> +@@ -4724,6 +4725,9 @@ + MKDEV(IDETAPE_MAJOR, tape->minor)); + class_device_destroy(idetape_sysfs_class, + MKDEV(IDETAPE_MAJOR, tape->minor + 128)); ++ devfs_remove("%s/mt", drive->devfs_name); ++ devfs_remove("%s/mtn", drive->devfs_name); ++ devfs_unregister_tape(g->number); + idetape_devs[tape->minor] = NULL; + g->private_data = NULL; + put_disk(g); +@@ -4897,6 +4901,14 @@ + class_device_create(idetape_sysfs_class, NULL, + MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->name); + ++ devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/mt", drive->devfs_name); ++ devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor + 128), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/mtn", drive->devfs_name); ++ ++ g->number = devfs_register_tape(drive->devfs_name); + g->fops = &idetape_block_ops; + ide_register_region(g); + +diff -urN linux-2.6.19.old/drivers/ieee1394/dv1394.c linux-2.6.19.dev/drivers/ieee1394/dv1394.c +--- linux-2.6.19.old/drivers/ieee1394/dv1394.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ieee1394/dv1394.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2263,14 +2263,37 @@ + list_add_tail(&video->list, &dv1394_cards); + spin_unlock_irqrestore(&dv1394_cards_lock, flags); + ++ if (devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, ++ IEEE1394_MINOR_BLOCK_DV1394*16 + video->id), ++ S_IFCHR|S_IRUGO|S_IWUGO, ++ "ieee1394/dv/host%d/%s/%s", ++ (video->id>>2), ++ (video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"), ++ (video->mode == MODE_RECEIVE ? "in" : "out")) < 0) ++ goto err_free; ++ + debug_printk("dv1394: dv1394_init() OK on ID %d\n", video->id); ++ + return 0; ++ ++ err_free: ++ kfree(video); ++ err: ++ return -1; + } + + static void dv1394_un_init(struct video_card *video) + { ++ char buf[32]; ++ + /* obviously nobody has the driver open at this point */ + do_dv1394_shutdown(video, 1); ++ snprintf(buf, sizeof(buf), "dv/host%d/%s/%s", (video->id >> 2), ++ (video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"), ++ (video->mode == MODE_RECEIVE ? "in" : "out") ++ ); ++ ++ devfs_remove("ieee1394/%s", buf); + kfree(video); + } + +@@ -2307,6 +2330,9 @@ + + class_device_destroy(hpsb_protocol_class, + MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2))); ++ devfs_remove("ieee1394/dv/host%d/NTSC", id); ++ devfs_remove("ieee1394/dv/host%d/PAL", id); ++ devfs_remove("ieee1394/dv/host%d", id); + } + + static void dv1394_add_host (struct hpsb_host *host) +@@ -2323,6 +2349,9 @@ + class_device_create(hpsb_protocol_class, NULL, MKDEV( + IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2)), + NULL, "dv1394-%d", id); ++ devfs_mk_dir("ieee1394/dv/host%d", id); ++ devfs_mk_dir("ieee1394/dv/host%d/NTSC", id); ++ devfs_mk_dir("ieee1394/dv/host%d/PAL", id); + + dv1394_init(ohci, DV1394_NTSC, MODE_RECEIVE); + dv1394_init(ohci, DV1394_NTSC, MODE_TRANSMIT); +@@ -2579,8 +2608,10 @@ + static void __exit dv1394_exit_module(void) + { + hpsb_unregister_protocol(&dv1394_driver); ++ + hpsb_unregister_highlevel(&dv1394_highlevel); + cdev_del(&dv1394_cdev); ++ devfs_remove("ieee1394/dv"); + } + + static int __init dv1394_init_module(void) +@@ -2596,12 +2627,15 @@ + return ret; + } + ++ devfs_mk_dir("ieee1394/dv"); ++ + hpsb_register_highlevel(&dv1394_highlevel); + + ret = hpsb_register_protocol(&dv1394_driver); + if (ret) { + printk(KERN_ERR "dv1394: failed to register protocol\n"); + hpsb_unregister_highlevel(&dv1394_highlevel); ++ devfs_remove("ieee1394/dv"); + cdev_del(&dv1394_cdev); + return ret; + } +diff -urN linux-2.6.19.old/drivers/ieee1394/ieee1394_core.c linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.c +--- linux-2.6.19.old/drivers/ieee1394/ieee1394_core.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1072,10 +1072,17 @@ + goto exit_release_kernel_thread; + } + ++ /* actually this is a non-fatal error */ ++ ret = devfs_mk_dir("ieee1394"); ++ if (ret < 0) { ++ HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR); ++ goto release_chrdev; ++ } ++ + ret = bus_register(&ieee1394_bus_type); + if (ret < 0) { + HPSB_INFO("bus register failed"); +- goto release_chrdev; ++ goto release_devfs; + } + + for (i = 0; fw_bus_attrs[i]; i++) { +@@ -1086,7 +1093,7 @@ + fw_bus_attrs[i--]); + } + bus_unregister(&ieee1394_bus_type); +- goto release_chrdev; ++ goto release_devfs; + } + } + +@@ -1139,6 +1146,8 @@ + for (i = 0; fw_bus_attrs[i]; i++) + bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]); + bus_unregister(&ieee1394_bus_type); ++release_devfs: ++ devfs_remove("ieee1394"); + release_chrdev: + unregister_chrdev_region(IEEE1394_CORE_DEV, 256); + exit_release_kernel_thread: +@@ -1168,6 +1177,7 @@ + hpsb_cleanup_config_roms(); + + unregister_chrdev_region(IEEE1394_CORE_DEV, 256); ++ devfs_remove("ieee1394"); + } + + fs_initcall(ieee1394_init); /* same as ohci1394 */ +diff -urN linux-2.6.19.old/drivers/ieee1394/ieee1394_core.h linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.h +--- linux-2.6.19.old/drivers/ieee1394/ieee1394_core.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.h 2006-12-14 03:12:59.000000000 +0100 +@@ -6,6 +6,7 @@ + #include <linux/list.h> + #include <linux/skbuff.h> + #include <linux/types.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/atomic.h> + + #include "hosts.h" +diff -urN linux-2.6.19.old/drivers/ieee1394/raw1394.c linux-2.6.19.dev/drivers/ieee1394/raw1394.c +--- linux-2.6.19.old/drivers/ieee1394/raw1394.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ieee1394/raw1394.c 2006-12-14 03:12:59.000000000 +0100 +@@ -41,6 +41,7 @@ + #include <linux/cdev.h> + #include <asm/uaccess.h> + #include <asm/atomic.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/compat.h> + + #include "csr1212.h" +@@ -3017,6 +3018,9 @@ + goto out_unreg; + } + ++ devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16), ++ S_IFCHR | S_IRUSR | S_IWUSR, RAW1394_DEVICE_NAME); ++ + cdev_init(&raw1394_cdev, &raw1394_fops); + raw1394_cdev.owner = THIS_MODULE; + kobject_set_name(&raw1394_cdev.kobj, RAW1394_DEVICE_NAME); +@@ -3038,6 +3042,7 @@ + goto out; + + out_dev: ++ devfs_remove(RAW1394_DEVICE_NAME); + class_device_destroy(hpsb_protocol_class, + MKDEV(IEEE1394_MAJOR, + IEEE1394_MINOR_BLOCK_RAW1394 * 16)); +@@ -3053,6 +3058,7 @@ + MKDEV(IEEE1394_MAJOR, + IEEE1394_MINOR_BLOCK_RAW1394 * 16)); + cdev_del(&raw1394_cdev); ++ devfs_remove(RAW1394_DEVICE_NAME); + hpsb_unregister_highlevel(&raw1394_highlevel); + hpsb_unregister_protocol(&raw1394_driver); + } +diff -urN linux-2.6.19.old/drivers/ieee1394/video1394.c linux-2.6.19.dev/drivers/ieee1394/video1394.c +--- linux-2.6.19.old/drivers/ieee1394/video1394.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/ieee1394/video1394.c 2006-12-14 03:12:59.000000000 +0100 +@@ -41,6 +41,7 @@ + #include <linux/poll.h> + #include <linux/smp_lock.h> + #include <linux/delay.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/bitops.h> + #include <linux/types.h> + #include <linux/vmalloc.h> +@@ -1356,6 +1357,9 @@ + class_device_create(hpsb_protocol_class, NULL, MKDEV( + IEEE1394_MAJOR, minor), + NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id); ++ devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id); + } + + +@@ -1363,9 +1367,12 @@ + { + struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host); + +- if (ohci) ++ if (ohci) { + class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR, + IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id)); ++ devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id); ++ } ++ + return; + } + +@@ -1506,8 +1513,12 @@ + static void __exit video1394_exit_module (void) + { + hpsb_unregister_protocol(&video1394_driver); ++ + hpsb_unregister_highlevel(&video1394_highlevel); ++ ++ devfs_remove(VIDEO1394_DRIVER_NAME); + cdev_del(&video1394_cdev); ++ + PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module"); + } + +@@ -1524,12 +1535,15 @@ + return ret; + } + ++ devfs_mk_dir(VIDEO1394_DRIVER_NAME); ++ + hpsb_register_highlevel(&video1394_highlevel); + + ret = hpsb_register_protocol(&video1394_driver); + if (ret) { + PRINT_G(KERN_ERR, "video1394: failed to register protocol"); + hpsb_unregister_highlevel(&video1394_highlevel); ++ devfs_remove(VIDEO1394_DRIVER_NAME); + cdev_del(&video1394_cdev); + return ret; + } +diff -urN linux-2.6.19.old/drivers/input/serio/serio_raw.c linux-2.6.19.dev/drivers/input/serio/serio_raw.c +--- linux-2.6.19.old/drivers/input/serio/serio_raw.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/input/serio/serio_raw.c 2006-12-14 03:12:59.000000000 +0100 +@@ -16,6 +16,7 @@ + #include <linux/init.h> + #include <linux/major.h> + #include <linux/device.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/miscdevice.h> + #include <linux/wait.h> + #include <linux/mutex.h> +diff -urN linux-2.6.19.old/drivers/isdn/capi/capi.c linux-2.6.19.dev/drivers/isdn/capi/capi.c +--- linux-2.6.19.old/drivers/isdn/capi/capi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/capi/capi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -38,6 +38,7 @@ + #include <linux/init.h> + #include <linux/device.h> + #include <linux/moduleparam.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/isdn/capiutil.h> + #include <linux/isdn/capicmd.h> + #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) +@@ -1335,6 +1336,7 @@ + + drv->owner = THIS_MODULE; + drv->driver_name = "capi_nc"; ++ drv->devfs_name = "capi/"; + drv->name = "capi"; + drv->major = capi_ttymajor; + drv->minor_start = 0; +@@ -1513,6 +1515,8 @@ + } + + class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); ++ devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR, ++ "isdn/capi20"); + + #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE + if (capinc_tty_init() < 0) { +@@ -1547,6 +1551,7 @@ + class_device_destroy(capi_class, MKDEV(capi_major, 0)); + class_destroy(capi_class); + unregister_chrdev(capi_major, "capi20"); ++ devfs_remove("isdn/capi20"); + + #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE + capinc_tty_exit(); +diff -urN linux-2.6.19.old/drivers/isdn/gigaset/bas-gigaset.c linux-2.6.19.dev/drivers/isdn/gigaset/bas-gigaset.c +--- linux-2.6.19.old/drivers/isdn/gigaset/bas-gigaset.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/gigaset/bas-gigaset.c 2006-12-14 03:12:59.000000000 +0100 +@@ -41,6 +41,7 @@ + #define GIGASET_MINORS 1 + #define GIGASET_MINOR 16 + #define GIGASET_MODULENAME "bas_gigaset" ++#define GIGASET_DEVFSNAME "gig/bas/" + #define GIGASET_DEVNAME "ttyGB" + + /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */ +@@ -2348,7 +2349,8 @@ + /* allocate memory for our driver state and intialize it */ + if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, + GIGASET_MODULENAME, GIGASET_DEVNAME, +- &gigops, THIS_MODULE)) == NULL) ++ GIGASET_DEVFSNAME, &gigops, ++ THIS_MODULE)) == NULL) + goto error; + + /* allocate memory for our device state and intialize it */ +diff -urN linux-2.6.19.old/drivers/isdn/gigaset/common.c linux-2.6.19.dev/drivers/isdn/gigaset/common.c +--- linux-2.6.19.old/drivers/isdn/gigaset/common.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/gigaset/common.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1092,12 +1092,14 @@ + * minors Number of minors this driver can handle + * procname Name of the driver + * devname Name of the device files (prefix without minor number) ++ * devfsname Devfs name of the device files without %d + * return value: + * Pointer to the gigaset_driver structure on success, NULL on failure. + */ + struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, + const char *procname, + const char *devname, ++ const char *devfsname, + const struct gigaset_ops *ops, + struct module *owner) + { +@@ -1137,7 +1139,7 @@ + drv->cs[i].minor_index = i; + } + +- gigaset_if_initdriver(drv, procname, devname); ++ gigaset_if_initdriver(drv, procname, devname, devfsname); + + spin_lock_irqsave(&driver_lock, flags); + list_add(&drv->list, &drivers); +diff -urN linux-2.6.19.old/drivers/isdn/gigaset/gigaset.h linux-2.6.19.dev/drivers/isdn/gigaset/gigaset.h +--- linux-2.6.19.old/drivers/isdn/gigaset/gigaset.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/gigaset/gigaset.h 2006-12-14 03:12:59.000000000 +0100 +@@ -768,6 +768,7 @@ + struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, + const char *procname, + const char *devname, ++ const char *devfsname, + const struct gigaset_ops *ops, + struct module *owner); + +@@ -890,7 +891,7 @@ + + /* initialize interface */ + void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname, +- const char *devname); ++ const char *devname, const char *devfsname); + /* release interface */ + void gigaset_if_freedriver(struct gigaset_driver *drv); + /* add minor */ +diff -urN linux-2.6.19.old/drivers/isdn/gigaset/interface.c linux-2.6.19.dev/drivers/isdn/gigaset/interface.c +--- linux-2.6.19.old/drivers/isdn/gigaset/interface.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/gigaset/interface.c 2006-12-14 03:12:59.000000000 +0100 +@@ -673,9 +673,10 @@ + * drv Driver + * procname Name of the driver (e.g. for /proc/tty/drivers) + * devname Name of the device files (prefix without minor number) ++ * devfsname Devfs name of the device files without %d + */ + void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname, +- const char *devname) ++ const char *devname, const char *devfsname) + { + unsigned minors = drv->minors; + int ret; +@@ -691,7 +692,7 @@ + tty->major = GIG_MAJOR, + tty->type = TTY_DRIVER_TYPE_SERIAL, + tty->subtype = SERIAL_TYPE_NORMAL, +- tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS, + + tty->driver_name = procname; + tty->name = devname; +@@ -699,6 +700,7 @@ + tty->num = drv->minors; + + tty->owner = THIS_MODULE; ++ tty->devfs_name = devfsname; + + tty->init_termios = tty_std_termios; //FIXME + tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; //FIXME +diff -urN linux-2.6.19.old/drivers/isdn/gigaset/usb-gigaset.c linux-2.6.19.dev/drivers/isdn/gigaset/usb-gigaset.c +--- linux-2.6.19.old/drivers/isdn/gigaset/usb-gigaset.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/gigaset/usb-gigaset.c 2006-12-14 03:12:59.000000000 +0100 +@@ -41,6 +41,7 @@ + #define GIGASET_MINORS 1 + #define GIGASET_MINOR 8 + #define GIGASET_MODULENAME "usb_gigaset" ++#define GIGASET_DEVFSNAME "gig/usb/" + #define GIGASET_DEVNAME "ttyGU" + + #define IF_WRITEBUF 2000 //FIXME // WAKEUP_CHARS: 256 +@@ -895,7 +896,8 @@ + /* allocate memory for our driver state and intialize it */ + if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, + GIGASET_MODULENAME, GIGASET_DEVNAME, +- &ops, THIS_MODULE)) == NULL) ++ GIGASET_DEVFSNAME, &ops, ++ THIS_MODULE)) == NULL) + goto error; + + /* allocate memory for our device state and intialize it */ +diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divamnt.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divamnt.c +--- linux-2.6.19.old/drivers/isdn/hardware/eicon/divamnt.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divamnt.c 2006-12-14 03:12:59.000000000 +0100 +@@ -10,12 +10,14 @@ + * of the GNU General Public License, incorporated herein by reference. + */ + ++#include <linux/config.h> + #include <linux/module.h> + #include <linux/init.h> + #include <linux/kernel.h> + #include <linux/sched.h> + #include <linux/smp_lock.h> + #include <linux/poll.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/uaccess.h> + + #include "platform.h" +@@ -176,6 +178,7 @@ + + static void divas_maint_unregister_chrdev(void) + { ++ devfs_remove(DEVNAME); + unregister_chrdev(major, DEVNAME); + } + +@@ -187,6 +190,7 @@ + DRIVERLNAME); + return (0); + } ++ devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME); + + return (1); + } +diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divasi.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasi.c +--- linux-2.6.19.old/drivers/isdn/hardware/eicon/divasi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -18,6 +18,7 @@ + #include <linux/poll.h> + #include <linux/proc_fs.h> + #include <linux/skbuff.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/uaccess.h> + + #include "platform.h" +@@ -143,6 +144,7 @@ + + static void divas_idi_unregister_chrdev(void) + { ++ devfs_remove(DEVNAME); + unregister_chrdev(major, DEVNAME); + } + +@@ -154,6 +156,7 @@ + DRIVERLNAME); + return (0); + } ++ devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME); + + return (1); + } +diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divasmain.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasmain.c +--- linux-2.6.19.old/drivers/isdn/hardware/eicon/divasmain.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasmain.c 2006-12-14 03:12:59.000000000 +0100 +@@ -9,10 +9,12 @@ + * of the GNU General Public License, incorporated herein by reference. + */ + ++#include <linux/config.h> + #include <linux/module.h> + #include <linux/init.h> + #include <linux/kernel.h> + #include <linux/sched.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/uaccess.h> + #include <asm/io.h> + #include <linux/ioport.h> +@@ -675,6 +677,7 @@ + + static void divas_unregister_chrdev(void) + { ++ devfs_remove(DEVNAME); + unregister_chrdev(major, DEVNAME); + } + +@@ -686,6 +689,7 @@ + DRIVERLNAME); + return (0); + } ++ devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME); + + return (1); + } +diff -urN linux-2.6.19.old/drivers/isdn/i4l/isdn_tty.c linux-2.6.19.dev/drivers/isdn/i4l/isdn_tty.c +--- linux-2.6.19.old/drivers/isdn/i4l/isdn_tty.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/isdn/i4l/isdn_tty.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1889,13 +1889,14 @@ + if (!m->tty_modem) + return -ENOMEM; + m->tty_modem->name = "ttyI"; ++ m->tty_modem->devfs_name = "isdn/ttyI"; + m->tty_modem->major = ISDN_TTY_MAJOR; + m->tty_modem->minor_start = 0; + m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL; + m->tty_modem->subtype = SERIAL_TYPE_NORMAL; + m->tty_modem->init_termios = tty_std_termios; + m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; +- m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + m->tty_modem->driver_name = "isdn_tty"; + tty_set_operations(m->tty_modem, &modem_ops); + retval = tty_register_driver(m->tty_modem); +diff -urN linux-2.6.19.old/drivers/macintosh/adb.c linux-2.6.19.dev/drivers/macintosh/adb.c +--- linux-2.6.19.old/drivers/macintosh/adb.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/macintosh/adb.c 2006-12-14 03:12:59.000000000 +0100 +@@ -35,6 +35,7 @@ + #include <linux/spinlock.h> + #include <linux/completion.h> + #include <linux/device.h> ++#include <linux/devfs_fs_kernel.h> + + #include <asm/uaccess.h> + #include <asm/semaphore.h> +@@ -902,6 +903,8 @@ + return; + } + ++ devfs_mk_cdev(MKDEV(ADB_MAJOR, 0), S_IFCHR | S_IRUSR | S_IWUSR, "adb"); ++ + adb_dev_class = class_create(THIS_MODULE, "adb"); + if (IS_ERR(adb_dev_class)) + return; +diff -urN linux-2.6.19.old/drivers/md/dm-ioctl.c linux-2.6.19.dev/drivers/md/dm-ioctl.c +--- linux-2.6.19.old/drivers/md/dm-ioctl.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/md/dm-ioctl.c 2006-12-14 03:12:59.000000000 +0100 +@@ -13,6 +13,7 @@ + #include <linux/init.h> + #include <linux/wait.h> + #include <linux/slab.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/dm-ioctl.h> + #include <linux/hdreg.h> + +@@ -67,12 +68,14 @@ + { + init_buckets(_name_buckets); + init_buckets(_uuid_buckets); ++ devfs_mk_dir(DM_DIR); + return 0; + } + + static void dm_hash_exit(void) + { + dm_hash_remove_all(0); ++ devfs_remove(DM_DIR); + } + + /*----------------------------------------------------------------- +@@ -169,6 +172,25 @@ + } + + /* ++ * devfs stuff. ++ */ ++static int register_with_devfs(struct hash_cell *hc) ++{ ++ struct gendisk *disk = dm_disk(hc->md); ++ ++ devfs_mk_bdev(MKDEV(disk->major, disk->first_minor), ++ S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP, ++ DM_DIR "/%s", hc->name); ++ return 0; ++} ++ ++static int unregister_with_devfs(struct hash_cell *hc) ++{ ++ devfs_remove(DM_DIR"/%s", hc->name); ++ return 0; ++} ++ ++/* + * The kdev_t and uuid of a device can never change once it is + * initially inserted. + */ +@@ -204,6 +226,7 @@ + } + list_add(&cell->uuid_list, _uuid_buckets + hash_str(uuid)); + } ++ register_with_devfs(cell); + dm_get(md); + dm_set_mdptr(md, cell); + up_write(&_hash_lock); +@@ -223,6 +246,7 @@ + /* remove from the dev hash */ + list_del(&hc->uuid_list); + list_del(&hc->name_list); ++ unregister_with_devfs(hc); + dm_set_mdptr(hc->md, NULL); + + table = dm_get_table(hc->md); +@@ -318,11 +342,16 @@ + /* + * rename and move the name cell. + */ ++ unregister_with_devfs(hc); ++ + list_del(&hc->name_list); + old_name = hc->name; + hc->name = new_name; + list_add(&hc->name_list, _name_buckets + hash_str(new_name)); + ++ /* rename the device node in devfs */ ++ register_with_devfs(hc); ++ + /* + * Wake up any dm event waiters. + */ +@@ -1477,6 +1506,7 @@ + static struct miscdevice _dm_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = DM_NAME, ++ .devfs_name = "mapper/control", + .fops = &_ctl_fops + }; + +diff -urN linux-2.6.19.old/drivers/md/md.c linux-2.6.19.dev/drivers/md/md.c +--- linux-2.6.19.old/drivers/md/md.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/md/md.c 2006-12-14 03:12:59.000000000 +0100 +@@ -38,6 +38,7 @@ + #include <linux/raid/md.h> + #include <linux/raid/bitmap.h> + #include <linux/sysctl.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/buffer_head.h> /* for invalidate_bdev */ + #include <linux/suspend.h> + #include <linux/poll.h> +@@ -2969,10 +2970,13 @@ + } + disk->major = MAJOR(dev); + disk->first_minor = unit << shift; +- if (partitioned) ++ if (partitioned) { + sprintf(disk->disk_name, "md_d%d", unit); +- else ++ sprintf(disk->devfs_name, "md/d%d", unit); ++ } else { + sprintf(disk->disk_name, "md%d", unit); ++ sprintf(disk->devfs_name, "md/%d", unit); ++ } + disk->fops = &md_fops; + disk->private_data = mddev; + disk->queue = mddev->queue; +@@ -5539,11 +5543,23 @@ + unregister_blkdev(MAJOR_NR, "md"); + return -1; + } ++ devfs_mk_dir("md"); + blk_register_region(MKDEV(MAJOR_NR, 0), 1UL<<MINORBITS, THIS_MODULE, + md_probe, NULL, NULL); + blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, + md_probe, NULL, NULL); + ++ for (minor=0; minor < MAX_MD_DEVS; ++minor) ++ devfs_mk_bdev(MKDEV(MAJOR_NR, minor), ++ S_IFBLK|S_IRUSR|S_IWUSR, ++ "md/%d", minor); ++ ++ for (minor=0; minor < MAX_MD_DEVS; ++minor) ++ devfs_mk_bdev(MKDEV(mdp_major, minor<<MdpMinorShift), ++ S_IFBLK|S_IRUSR|S_IWUSR, ++ "md/mdp%d", minor); ++ ++ + register_reboot_notifier(&md_notifier); + raid_table_header = register_sysctl_table(raid_root_table, 1); + +@@ -5599,9 +5615,16 @@ + { + mddev_t *mddev; + struct list_head *tmp; ++ int i; + + blk_unregister_region(MKDEV(MAJOR_NR,0), 1U << MINORBITS); + blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); ++ for (i=0; i < MAX_MD_DEVS; i++) ++ devfs_remove("md/%d", i); ++ for (i=0; i < MAX_MD_DEVS; i++) ++ devfs_remove("md/d%d", i); ++ ++ devfs_remove("md"); + + unregister_blkdev(MAJOR_NR,"md"); + unregister_blkdev(mdp_major, "mdp"); +diff -urN linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.c linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.c +--- linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -231,6 +231,10 @@ + + mutex_unlock(&dvbdev_register_lock); + ++ devfs_mk_cdev(MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "dvb/adapter%d/%s%d", adap->num, dnames[type], id); ++ + class_device_create(dvb_class, NULL, MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)), + adap->device, "dvb%d.%s%d", adap->num, dnames[type], id); + +@@ -248,6 +252,9 @@ + if (!dvbdev) + return; + ++ devfs_remove("dvb/adapter%d/%s%d", dvbdev->adapter->num, ++ dnames[dvbdev->type], dvbdev->id); ++ + class_device_destroy(dvb_class, MKDEV(DVB_MAJOR, nums2minor(dvbdev->adapter->num, + dvbdev->type, dvbdev->id))); + +@@ -295,6 +302,7 @@ + + printk ("DVB: registering new adapter (%s).\n", name); + ++ devfs_mk_dir("dvb/adapter%d", num); + adap->num = num; + adap->name = name; + adap->module = module; +@@ -311,6 +319,8 @@ + + int dvb_unregister_adapter(struct dvb_adapter *adap) + { ++ devfs_remove("dvb/adapter%d", adap->num); ++ + if (mutex_lock_interruptible(&dvbdev_register_lock)) + return -ERESTARTSYS; + list_del (&adap->list_head); +@@ -400,6 +410,8 @@ + goto error; + } + ++ devfs_mk_dir("dvb"); ++ + dvb_class = class_create(THIS_MODULE, "dvb"); + if (IS_ERR(dvb_class)) { + retval = PTR_ERR(dvb_class); +@@ -416,6 +428,7 @@ + + static void __exit exit_dvbdev(void) + { ++ devfs_remove("dvb"); + class_destroy(dvb_class); + cdev_del(&dvb_device_cdev); + unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); +diff -urN linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.h linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.h +--- linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.h 2006-12-14 03:12:59.000000000 +0100 +@@ -27,6 +27,7 @@ + #include <linux/poll.h> + #include <linux/fs.h> + #include <linux/list.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + + #define DVB_MAJOR 212 +diff -urN linux-2.6.19.old/drivers/media/dvb/ttpci/av7110.h linux-2.6.19.dev/drivers/media/dvb/ttpci/av7110.h +--- linux-2.6.19.old/drivers/media/dvb/ttpci/av7110.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/dvb/ttpci/av7110.h 2006-12-14 03:12:59.000000000 +0100 +@@ -6,6 +6,10 @@ + #include <linux/netdevice.h> + #include <linux/i2c.h> + ++#ifdef CONFIG_DEVFS_FS ++#include <linux/devfs_fs_kernel.h> ++#endif ++ + #include <linux/dvb/video.h> + #include <linux/dvb/audio.h> + #include <linux/dvb/dmx.h> +diff -urN linux-2.6.19.old/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c linux-2.6.19.dev/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c +--- linux-2.6.19.old/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c 2006-12-14 03:12:59.000000000 +0100 +@@ -126,6 +126,10 @@ + + int revision; + ++#if 0 ++ devfs_handle_t stc_devfs_handle; ++#endif ++ + struct dvb_frontend* fe; + }; + +@@ -1741,6 +1745,13 @@ + return -ENODEV; + } + ++#if 0 ++ ttusb->stc_devfs_handle = ++ devfs_register(ttusb->adapter->devfs_handle, TTUSB_BUDGET_NAME, ++ DEVFS_FL_DEFAULT, 0, 192, ++ S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP ++ | S_IROTH | S_IWOTH, &stc_fops, ttusb); ++#endif + usb_set_intfdata(intf, (void *) ttusb); + + frontend_init(ttusb); +diff -urN linux-2.6.19.old/drivers/media/radio/miropcm20-rds.c linux-2.6.19.dev/drivers/media/radio/miropcm20-rds.c +--- linux-2.6.19.old/drivers/media/radio/miropcm20-rds.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/radio/miropcm20-rds.c 2006-12-14 03:12:59.000000000 +0100 +@@ -115,6 +115,7 @@ + static struct miscdevice rds_miscdev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "radiotext", ++ .devfs_name = "v4l/rds/radiotext", + .fops = &rds_fops, + }; + +diff -urN linux-2.6.19.old/drivers/media/video/arv.c linux-2.6.19.dev/drivers/media/video/arv.c +--- linux-2.6.19.old/drivers/media/video/arv.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/video/arv.c 2006-12-14 03:12:59.000000000 +0100 +@@ -19,6 +19,7 @@ + */ + + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/module.h> + #include <linux/delay.h> + #include <linux/errno.h> +diff -urN linux-2.6.19.old/drivers/media/video/videodev.c linux-2.6.19.dev/drivers/media/video/videodev.c +--- linux-2.6.19.old/drivers/media/video/videodev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/media/video/videodev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -38,6 +38,7 @@ + #include <linux/init.h> + #include <linux/kmod.h> + #include <linux/slab.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/uaccess.h> + #include <asm/system.h> + +@@ -1593,6 +1594,10 @@ + video_device[i]=vfd; + vfd->minor=i; + mutex_unlock(&videodev_lock); ++ ++ sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base); ++ devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor), ++ S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name); + mutex_init(&vfd->lock); + + /* sysfs class */ +@@ -1602,6 +1607,7 @@ + vfd->class_dev.class = &video_class; + vfd->class_dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor); + sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base); ++ strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE); + ret = class_device_register(&vfd->class_dev); + if (ret < 0) { + printk(KERN_ERR "%s: class_device_register failed\n", +@@ -1648,6 +1654,7 @@ + if(video_device[vfd->minor]!=vfd) + panic("videodev: bad unregister"); + ++ devfs_remove(vfd->devfs_name); + video_device[vfd->minor]=NULL; + class_device_unregister(&vfd->class_dev); + mutex_unlock(&videodev_lock); +diff -urN linux-2.6.19.old/drivers/message/i2o/i2o_block.c linux-2.6.19.dev/drivers/message/i2o/i2o_block.c +--- linux-2.6.19.old/drivers/message/i2o/i2o_block.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/message/i2o/i2o_block.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1090,6 +1090,7 @@ + gd = i2o_blk_dev->gd; + gd->first_minor = unit << 4; + sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit); ++ sprintf(gd->devfs_name, "i2o/hd%c", 'a' + unit); + gd->driverfs_dev = &i2o_dev->device; + + /* setup request queue */ +diff -urN linux-2.6.19.old/drivers/mmc/mmc_block.c linux-2.6.19.dev/drivers/mmc/mmc_block.c +--- linux-2.6.19.old/drivers/mmc/mmc_block.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/mmc/mmc_block.c 2006-12-14 03:12:59.000000000 +0100 +@@ -27,6 +27,7 @@ + #include <linux/hdreg.h> + #include <linux/kdev_t.h> + #include <linux/blkdev.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/mutex.h> + #include <linux/scatterlist.h> + +@@ -472,6 +473,7 @@ + */ + + sprintf(md->disk->disk_name, "mmcblk%d", devidx); ++ sprintf(md->disk->devfs_name, "mmc/blk%d", devidx); + + blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); + +@@ -617,6 +619,7 @@ + if (major == 0) + major = res; + ++ devfs_mk_dir("mmc"); + return mmc_register_driver(&mmc_driver); + + out: +@@ -626,6 +629,7 @@ + static void __exit mmc_blk_exit(void) + { + mmc_unregister_driver(&mmc_driver); ++ devfs_remove("mmc"); + unregister_blkdev(major, "mmc"); + } + +diff -urN linux-2.6.19.old/drivers/mtd/mtd_blkdevs.c linux-2.6.19.dev/drivers/mtd/mtd_blkdevs.c +--- linux-2.6.19.old/drivers/mtd/mtd_blkdevs.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/mtd/mtd_blkdevs.c 2006-12-14 03:12:59.000000000 +0100 +@@ -21,6 +21,9 @@ + #include <linux/init.h> + #include <linux/mutex.h> + #include <asm/uaccess.h> ++#ifdef CONFIG_DEVFS_FS ++#include <linux/devfs_fs_kernel.h> ++#endif + + static LIST_HEAD(blktrans_majors); + +@@ -295,6 +298,11 @@ + snprintf(gd->disk_name, sizeof(gd->disk_name), + "%s%d", tr->name, new->devnum); + ++#ifdef CONFIG_DEVFS_FS ++ snprintf(gd->devfs_name, sizeof(gd->devfs_name), ++ "%s/%c", tr->name, (tr->part_bits?'a':'0') + new->devnum); ++#endif ++ + /* 2.5 has capacity in units of 512 bytes while still + having BLOCK_SIZE_BITS set to 10. Just to keep us amused. */ + set_capacity(gd, (new->size * new->blksize) >> 9); +@@ -411,6 +419,10 @@ + return ret; + } + ++#ifdef CONFIG_DEVFS_FS ++ devfs_mk_dir(tr->name); ++#endif ++ + INIT_LIST_HEAD(&tr->devs); + list_add(&tr->list, &blktrans_majors); + +@@ -443,6 +455,10 @@ + tr->remove_dev(dev); + } + ++#ifdef CONFIG_DEVFS_FS ++ devfs_remove(tr->name); ++#endif ++ + blk_cleanup_queue(tr->blkcore_priv->rq); + unregister_blkdev(tr->major, tr->name); + +diff -urN linux-2.6.19.old/drivers/mtd/mtdchar.c linux-2.6.19.dev/drivers/mtd/mtdchar.c +--- linux-2.6.19.old/drivers/mtd/mtdchar.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/mtd/mtdchar.c 2006-12-14 03:12:59.000000000 +0100 +@@ -18,19 +18,33 @@ + + #include <asm/uaccess.h> + ++#ifdef CONFIG_DEVFS_FS ++#include <linux/devfs_fs_kernel.h> ++#else ++#include <linux/device.h> ++ + static struct class *mtd_class; ++#endif + + static void mtd_notify_add(struct mtd_info* mtd) + { + if (!mtd) + return; + ++#ifdef CONFIG_DEVFS_FS ++ devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2), ++ S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index); ++ ++ devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), ++ S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index); ++#else + class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2), + NULL, "mtd%d", mtd->index); + + class_device_create(mtd_class, NULL, + MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), + NULL, "mtd%dro", mtd->index); ++#endif + } + + static void mtd_notify_remove(struct mtd_info* mtd) +@@ -38,8 +52,13 @@ + if (!mtd) + return; + ++#ifdef CONFIG_DEVFS_FS ++ devfs_remove("mtd/%d", mtd->index); ++ devfs_remove("mtd/%dro", mtd->index); ++#else + class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2)); + class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1)); ++#endif + } + + static struct mtd_notifier notifier = { +@@ -47,6 +66,22 @@ + .remove = mtd_notify_remove, + }; + ++#ifdef CONFIG_DEVFS_FS ++ static inline void mtdchar_devfs_init(void) ++ { ++ devfs_mk_dir("mtd"); ++ register_mtd_user(¬ifier); ++ } ++ static inline void mtdchar_devfs_exit(void) ++ { ++ unregister_mtd_user(¬ifier); ++ devfs_remove("mtd"); ++ } ++ #else /* !DEVFS */ ++ #define mtdchar_devfs_init() do { } while(0) ++ #define mtdchar_devfs_exit() do { } while(0) ++#endif ++ + /* + * Data structure to hold the pointer to the mtd device as well + * as mode information ofr various use cases. +@@ -778,6 +813,9 @@ + return -EAGAIN; + } + ++#ifdef CONFIG_DEVFS_FS ++ mtdchar_devfs_init(); ++#else + mtd_class = class_create(THIS_MODULE, "mtd"); + + if (IS_ERR(mtd_class)) { +@@ -787,13 +825,19 @@ + } + + register_mtd_user(¬ifier); ++#endif + return 0; + } + + static void __exit cleanup_mtdchar(void) + { ++ ++#ifdef CONFIG_DEVFS_FS ++ mtdchar_devfs_exit(); ++#else + unregister_mtd_user(¬ifier); + class_destroy(mtd_class); ++#endif + unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); + } + +diff -urN linux-2.6.19.old/drivers/net/ppp_generic.c linux-2.6.19.dev/drivers/net/ppp_generic.c +--- linux-2.6.19.old/drivers/net/ppp_generic.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/net/ppp_generic.c 2006-12-14 03:12:59.000000000 +0100 +@@ -27,6 +27,7 @@ + #include <linux/kmod.h> + #include <linux/init.h> + #include <linux/list.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/netdevice.h> + #include <linux/poll.h> + #include <linux/ppp_defs.h> +@@ -861,6 +862,10 @@ + goto out_chrdev; + } + class_device_create(ppp_class, NULL, MKDEV(PPP_MAJOR, 0), NULL, "ppp"); ++ err = devfs_mk_cdev(MKDEV(PPP_MAJOR, 0), ++ S_IFCHR|S_IRUSR|S_IWUSR, "ppp"); ++ if (err) ++ goto out_chrdev; + } + + out: +@@ -2675,6 +2680,7 @@ + cardmap_destroy(&all_ppp_units); + if (unregister_chrdev(PPP_MAJOR, "ppp") != 0) + printk(KERN_ERR "PPP: failed to unregister PPP device\n"); ++ devfs_remove("ppp"); + class_device_destroy(ppp_class, MKDEV(PPP_MAJOR, 0)); + class_destroy(ppp_class); + } +diff -urN linux-2.6.19.old/drivers/net/tun.c linux-2.6.19.dev/drivers/net/tun.c +--- linux-2.6.19.old/drivers/net/tun.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/net/tun.c 2006-12-14 03:12:59.000000000 +0100 +@@ -762,6 +762,7 @@ + .minor = TUN_MINOR, + .name = "tun", + .fops = &tun_fops, ++ .devfs_name = "net/tun", + }; + + /* ethtool interface */ +diff -urN linux-2.6.19.old/drivers/net/wan/cosa.c linux-2.6.19.dev/drivers/net/wan/cosa.c +--- linux-2.6.19.old/drivers/net/wan/cosa.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/net/wan/cosa.c 2006-12-14 03:12:59.000000000 +0100 +@@ -84,6 +84,7 @@ + #include <linux/slab.h> + #include <linux/poll.h> + #include <linux/fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/interrupt.h> + #include <linux/delay.h> + #include <linux/errno.h> +@@ -391,6 +392,7 @@ + err = -ENODEV; + goto out; + } ++ devfs_mk_dir("cosa"); + cosa_class = class_create(THIS_MODULE, "cosa"); + if (IS_ERR(cosa_class)) { + err = PTR_ERR(cosa_class); +@@ -399,6 +401,13 @@ + for (i=0; i<nr_cards; i++) { + class_device_create(cosa_class, NULL, MKDEV(cosa_major, i), + NULL, "cosa%d", i); ++ err = devfs_mk_cdev(MKDEV(cosa_major, i), ++ S_IFCHR|S_IRUSR|S_IWUSR, ++ "cosa/%d", i); ++ if (err) { ++ class_device_destroy(cosa_class, MKDEV(cosa_major, i)); ++ goto out_chrdev; ++ } + } + err = 0; + goto out; +@@ -416,9 +425,12 @@ + int i; + printk(KERN_INFO "Unloading the cosa module\n"); + +- for (i=0; i<nr_cards; i++) ++ for (i=0; i<nr_cards; i++) { + class_device_destroy(cosa_class, MKDEV(cosa_major, i)); ++ devfs_remove("cosa/%d", i); ++ } + class_destroy(cosa_class); ++ devfs_remove("cosa"); + for (cosa=cosa_cards; nr_cards--; cosa++) { + /* Clean up the per-channel data */ + for (i=0; i<cosa->nchannels; i++) { +diff -urN linux-2.6.19.old/drivers/s390/block/dasd.c linux-2.6.19.dev/drivers/s390/block/dasd.c +--- linux-2.6.19.old/drivers/s390/block/dasd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/block/dasd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1903,6 +1903,7 @@ + } + dasd_gendisk_exit(); + dasd_devmap_exit(); ++ devfs_remove("dasd"); + if (dasd_debug_area != NULL) { + debug_unregister(dasd_debug_area); + dasd_debug_area = NULL; +@@ -2176,6 +2177,9 @@ + + dasd_diag_discipline_pointer = NULL; + ++ rc = devfs_mk_dir("dasd"); ++ if (rc) ++ goto failed; + rc = dasd_devmap_init(); + if (rc) + goto failed; +diff -urN linux-2.6.19.old/drivers/s390/block/dasd_genhd.c linux-2.6.19.dev/drivers/s390/block/dasd_genhd.c +--- linux-2.6.19.old/drivers/s390/block/dasd_genhd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/block/dasd_genhd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -67,6 +67,8 @@ + } + len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26)); + ++ sprintf(gdp->devfs_name, "dasd/%s", device->cdev->dev.bus_id); ++ + if (device->features & DASD_FEATURE_READONLY) + set_disk_ro(gdp, 1); + gdp->private_data = device; +diff -urN linux-2.6.19.old/drivers/s390/block/dasd_int.h linux-2.6.19.dev/drivers/s390/block/dasd_int.h +--- linux-2.6.19.old/drivers/s390/block/dasd_int.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/block/dasd_int.h 2006-12-14 03:12:59.000000000 +0100 +@@ -54,6 +54,7 @@ + #include <linux/module.h> + #include <linux/wait.h> + #include <linux/blkdev.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/genhd.h> + #include <linux/hdreg.h> + #include <linux/interrupt.h> +diff -urN linux-2.6.19.old/drivers/s390/block/xpram.c linux-2.6.19.dev/drivers/s390/block/xpram.c +--- linux-2.6.19.old/drivers/s390/block/xpram.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/block/xpram.c 2006-12-14 03:12:59.000000000 +0100 +@@ -36,6 +36,7 @@ + #include <linux/hdreg.h> /* HDIO_GETGEO */ + #include <linux/sysdev.h> + #include <linux/bio.h> ++#include <linux/devfs_fs_kernel.h> + #include <asm/uaccess.h> + + #define XPRAM_NAME "xpram" +@@ -363,6 +364,8 @@ + if (rc < 0) + goto out; + ++ devfs_mk_dir("slram"); ++ + /* + * Assign the other needed values: make request function, sizes and + * hardsect size. All the minor devices feature the same value. +@@ -391,12 +394,14 @@ + disk->private_data = &xpram_devices[i]; + disk->queue = xpram_queue; + sprintf(disk->disk_name, "slram%d", i); ++ sprintf(disk->devfs_name, "slram/%d", i); + set_capacity(disk, xpram_sizes[i] << 1); + add_disk(disk); + } + + return 0; + out_unreg: ++ devfs_remove("slram"); + unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME); + out: + while (i--) +@@ -415,7 +420,10 @@ + put_disk(xpram_disks[i]); + } + unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME); ++ devfs_remove("slram"); + blk_cleanup_queue(xpram_queue); ++ sysdev_unregister(&xpram_sys_device); ++ sysdev_class_unregister(&xpram_sysclass); + } + + static int __init xpram_init(void) +diff -urN linux-2.6.19.old/drivers/s390/char/monreader.c linux-2.6.19.dev/drivers/s390/char/monreader.c +--- linux-2.6.19.old/drivers/s390/char/monreader.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/char/monreader.c 2006-12-14 03:12:59.000000000 +0100 +@@ -586,6 +586,7 @@ + + static struct miscdevice mon_dev = { + .name = "monreader", ++ .devfs_name = "monreader", + .fops = &mon_fops, + .minor = MISC_DYNAMIC_MINOR, + }; +diff -urN linux-2.6.19.old/drivers/s390/char/tty3270.c linux-2.6.19.dev/drivers/s390/char/tty3270.c +--- linux-2.6.19.old/drivers/s390/char/tty3270.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/s390/char/tty3270.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1783,6 +1783,7 @@ + * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc + */ + driver->owner = THIS_MODULE; ++ driver->devfs_name = "ttyTUB/"; + driver->driver_name = "ttyTUB"; + driver->name = "ttyTUB"; + driver->major = IBM_TTY3270_MAJOR; +@@ -1790,7 +1791,7 @@ + driver->type = TTY_DRIVER_TYPE_SYSTEM; + driver->subtype = SYSTEM_TYPE_TTY; + driver->init_termios = tty_std_termios; +- driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV; ++ driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS; + tty_set_operations(driver, &tty3270_ops); + ret = tty_register_driver(driver); + if (ret) { +diff -urN linux-2.6.19.old/drivers/sbus/char/bpp.c linux-2.6.19.dev/drivers/sbus/char/bpp.c +--- linux-2.6.19.old/drivers/sbus/char/bpp.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/sbus/char/bpp.c 2006-12-14 03:12:59.000000000 +0100 +@@ -20,6 +20,7 @@ + #include <linux/timer.h> + #include <linux/ioport.h> + #include <linux/major.h> ++#include <linux/devfs_fs_kernel.h> + + #include <asm/uaccess.h> + #include <asm/io.h> +@@ -1030,6 +1031,11 @@ + instances[idx].opened = 0; + probeLptPort(idx); + } ++ devfs_mk_dir("bpp"); ++ for (idx = 0; idx < BPP_NO; idx++) { ++ devfs_mk_cdev(MKDEV(BPP_MAJOR, idx), ++ S_IFCHR | S_IRUSR | S_IWUSR, "bpp/%d", idx); ++ } + + return 0; + } +@@ -1038,6 +1044,9 @@ + { + unsigned idx; + ++ for (idx = 0; idx < BPP_NO; idx++) ++ devfs_remove("bpp/%d", idx); ++ devfs_remove("bpp"); + unregister_chrdev(BPP_MAJOR, dev_name); + + for (idx = 0; idx < BPP_NO; idx++) { +diff -urN linux-2.6.19.old/drivers/sbus/char/vfc_dev.c linux-2.6.19.dev/drivers/sbus/char/vfc_dev.c +--- linux-2.6.19.old/drivers/sbus/char/vfc_dev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/sbus/char/vfc_dev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -164,6 +164,10 @@ + return -EINVAL; + if (init_vfc_hw(dev)) + return -EIO; ++ ++ devfs_mk_cdev(MKDEV(VFC_MAJOR, instance), ++ S_IFCHR | S_IRUSR | S_IWUSR, ++ "vfc/%d", instance); + return 0; + } + +@@ -673,6 +677,7 @@ + kfree(vfc_dev_lst); + return -EIO; + } ++ devfs_mk_dir("vfc"); + instance = 0; + for_all_sbusdev(sdev, sbus) { + if (strcmp(sdev->prom_name, "vfc") == 0) { +@@ -712,6 +717,7 @@ + { + if(dev == NULL) + return; ++ devfs_remove("vfc/%d", dev->instance); + sbus_iounmap(dev->regs, sizeof(struct vfc_regs)); + kfree(dev); + } +@@ -725,6 +731,7 @@ + for (devp = vfc_dev_lst; *devp; devp++) + deinit_vfc_device(*devp); + ++ devfs_remove("vfc"); + kfree(vfc_dev_lst); + return; + } +diff -urN linux-2.6.19.old/drivers/sbus/char/vfc.h linux-2.6.19.dev/drivers/sbus/char/vfc.h +--- linux-2.6.19.old/drivers/sbus/char/vfc.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/sbus/char/vfc.h 2006-12-14 03:12:59.000000000 +0100 +@@ -1,6 +1,8 @@ + #ifndef _LINUX_VFC_H_ + #define _LINUX_VFC_H_ + ++#include <linux/devfs_fs_kernel.h> ++ + /* + * The control register for the vfc is at offset 0x4000 + * The first field ram bank is located at offset 0x5000 +diff -urN linux-2.6.19.old/drivers/scsi/osst.c linux-2.6.19.dev/drivers/scsi/osst.c +--- linux-2.6.19.old/drivers/scsi/osst.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/osst.c 2006-12-14 03:12:59.000000000 +0100 +@@ -48,6 +48,7 @@ + #include <linux/vmalloc.h> + #include <linux/blkdev.h> + #include <linux/moduleparam.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/delay.h> + #include <linux/jiffies.h> + #include <asm/uaccess.h> +@@ -5859,6 +5860,18 @@ + STps->drv_block = (-1); + STps->drv_file = (-1); + } ++ for (mode = 0; mode < ST_NBR_MODES; ++mode) { ++ /* Rewind entry */ ++ devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5)), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/ot%s", SDp->devfs_name, osst_formats[mode]); ++ ++ /* No-rewind entry */ ++ devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5) + 128), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/ot%sn", SDp->devfs_name, osst_formats[mode]); ++ } ++ drive->number = devfs_register_tape(SDp->devfs_name); + + tpnt->current_mode = 0; + tpnt->modes[0].defined = 1; +@@ -5914,6 +5927,11 @@ + osst_sysfs_destroy(MKDEV(OSST_MAJOR, i)); + osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128)); + tpnt->device = NULL; ++ for (mode = 0; mode < ST_NBR_MODES; ++mode) { ++ devfs_remove("%s/ot%s", SDp->devfs_name, osst_formats[mode]); ++ devfs_remove("%s/ot%sn", SDp->devfs_name, osst_formats[mode]); ++ } ++ devfs_unregister_tape(tpnt->drive->number); + put_disk(tpnt->drive); + os_scsi_tapes[i] = NULL; + osst_nr_dev--; +diff -urN linux-2.6.19.old/drivers/scsi/scsi.c linux-2.6.19.dev/drivers/scsi/scsi.c +--- linux-2.6.19.old/drivers/scsi/scsi.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/scsi.c 2006-12-14 03:12:59.000000000 +0100 +@@ -48,6 +48,7 @@ + #include <linux/delay.h> + #include <linux/init.h> + #include <linux/completion.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/unistd.h> + #include <linux/spinlock.h> + #include <linux/kmod.h> +@@ -1119,6 +1120,7 @@ + + scsi_netlink_init(); + ++ devfs_mk_dir("scsi"); + printk(KERN_NOTICE "SCSI subsystem initialized\n"); + return 0; + +@@ -1144,6 +1146,7 @@ + scsi_exit_sysctl(); + scsi_exit_hosts(); + scsi_exit_devinfo(); ++ devfs_remove("scsi"); + scsi_exit_procfs(); + scsi_exit_queue(); + } +diff -urN linux-2.6.19.old/drivers/scsi/scsi_scan.c linux-2.6.19.dev/drivers/scsi/scsi_scan.c +--- linux-2.6.19.old/drivers/scsi/scsi_scan.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/scsi_scan.c 2006-12-14 03:12:59.000000000 +0100 +@@ -719,8 +719,12 @@ + sdev->inq_periph_qual, inq_result[2] & 0x07, + (inq_result[3] & 0x0f) == 1 ? " CCS" : ""); + ++ sprintf(sdev->devfs_name, "scsi/host%d/bus%d/target%d/lun%d", ++ sdev->host->host_no, sdev->channel, ++ sdev->id, sdev->lun); ++ + /* +- * End sysfs code. ++ * End driverfs/devfs code. + */ + + if ((sdev->scsi_level >= SCSI_2) && (inq_result[7] & 2) && +diff -urN linux-2.6.19.old/drivers/scsi/sd.c linux-2.6.19.dev/drivers/scsi/sd.c +--- linux-2.6.19.old/drivers/scsi/sd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/sd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1687,6 +1687,8 @@ + 'a' + m1, 'a' + m2, 'a' + m3); + } + ++ strcpy(gd->devfs_name, sdp->devfs_name); ++ + gd->private_data = &sdkp->driver; + gd->queue = sdkp->device->request_queue; + +diff -urN linux-2.6.19.old/drivers/scsi/sg.c linux-2.6.19.dev/drivers/scsi/sg.c +--- linux-2.6.19.old/drivers/scsi/sg.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/sg.c 2006-12-14 03:12:59.000000000 +0100 +@@ -43,6 +43,7 @@ + #include <linux/poll.h> + #include <linux/smp_lock.h> + #include <linux/moduleparam.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/cdev.h> + #include <linux/seq_file.h> + #include <linux/blkdev.h> +@@ -1530,6 +1531,7 @@ + class_device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, k)); + cdev_del(sdp->cdev); + sdp->cdev = NULL; ++ devfs_remove("%s/generic", scsidp->devfs_name); + put_disk(sdp->disk); + sdp->disk = NULL; + if (NULL == sdp->headfp) +diff -urN linux-2.6.19.old/drivers/scsi/sr.c linux-2.6.19.dev/drivers/scsi/sr.c +--- linux-2.6.19.old/drivers/scsi/sr.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/sr.c 2006-12-14 03:12:59.000000000 +0100 +@@ -591,6 +591,8 @@ + get_capabilities(cd); + sr_vendor_init(cd); + ++ snprintf(disk->devfs_name, sizeof(disk->devfs_name), ++ "%s/cd", sdev->devfs_name); + disk->driverfs_dev = &sdev->sdev_gendev; + set_capacity(disk, cd->capacity); + disk->private_data = &cd->driver; +diff -urN linux-2.6.19.old/drivers/scsi/st.c linux-2.6.19.dev/drivers/scsi/st.c +--- linux-2.6.19.old/drivers/scsi/st.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/scsi/st.c 2006-12-14 03:12:59.000000000 +0100 +@@ -35,6 +35,7 @@ + #include <linux/spinlock.h> + #include <linux/blkdev.h> + #include <linux/moduleparam.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/cdev.h> + #include <linux/delay.h> + #include <linux/mutex.h> +@@ -4056,6 +4057,21 @@ + goto out_free_tape; + } + ++ for (mode = 0; mode < ST_NBR_MODES; ++mode) { ++ /* Make sure that the minor numbers corresponding to the four ++ first modes always get the same names */ ++ i = mode << (4 - ST_NBR_MODE_BITS); ++ /* Rewind entry */ ++ devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 0)), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/mt%s", SDp->devfs_name, st_formats[i]); ++ /* No-rewind entry */ ++ devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 1)), ++ S_IFCHR | S_IRUGO | S_IWUGO, ++ "%s/mt%sn", SDp->devfs_name, st_formats[i]); ++ } ++ disk->number = devfs_register_tape(SDp->devfs_name); ++ + sdev_printk(KERN_WARNING, SDp, + "Attached scsi tape %s\n", tape_name(tpnt)); + printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B)\n", +@@ -4109,9 +4125,13 @@ + scsi_tapes[i] = NULL; + st_nr_dev--; + write_unlock(&st_dev_arr_lock); ++ devfs_unregister_tape(tpnt->disk->number); + sysfs_remove_link(&tpnt->device->sdev_gendev.kobj, + "tape"); + for (mode = 0; mode < ST_NBR_MODES; ++mode) { ++ j = mode << (4 - ST_NBR_MODE_BITS); ++ devfs_remove("%s/mt%s", SDp->devfs_name, st_formats[j]); ++ devfs_remove("%s/mt%sn", SDp->devfs_name, st_formats[j]); + for (j=0; j < 2; j++) { + class_device_destroy(st_sysfs_class, + MKDEV(SCSI_TAPE_MAJOR, +diff -urN linux-2.6.19.old/drivers/serial/21285.c linux-2.6.19.dev/drivers/serial/21285.c +--- linux-2.6.19.old/drivers/serial/21285.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/21285.c 2006-12-14 03:12:59.000000000 +0100 +@@ -478,6 +478,7 @@ + .owner = THIS_MODULE, + .driver_name = "ttyFB", + .dev_name = "ttyFB", ++ .devfs_name = "ttyFB", + .major = SERIAL_21285_MAJOR, + .minor = SERIAL_21285_MINOR, + .nr = 1, +diff -urN linux-2.6.19.old/drivers/serial/8250.c linux-2.6.19.dev/drivers/serial/8250.c +--- linux-2.6.19.old/drivers/serial/8250.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/8250.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2381,6 +2381,7 @@ + static struct uart_driver serial8250_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, +diff -urN linux-2.6.19.old/drivers/serial/atmel_serial.c linux-2.6.19.dev/drivers/serial/atmel_serial.c +--- linux-2.6.19.old/drivers/serial/atmel_serial.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/atmel_serial.c 2006-12-14 03:12:59.000000000 +0100 +@@ -875,6 +875,7 @@ + .owner = THIS_MODULE, + .driver_name = "atmel_serial", + .dev_name = ATMEL_DEVICENAME, ++ .devfs_name = ATMEL_DEVICENAME, + .major = SERIAL_ATMEL_MAJOR, + .minor = MINOR_START, + .nr = ATMEL_MAX_UART, +diff -urN linux-2.6.19.old/drivers/serial/crisv10.c linux-2.6.19.dev/drivers/serial/crisv10.c +--- linux-2.6.19.old/drivers/serial/crisv10.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/crisv10.c 2006-12-14 03:12:59.000000000 +0100 +@@ -4877,7 +4877,7 @@ + driver->init_termios = tty_std_termios; + driver->init_termios.c_cflag = + B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ +- driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + driver->termios = serial_termios; + driver->termios_locked = serial_termios_locked; + +diff -urN linux-2.6.19.old/drivers/serial/dz.c linux-2.6.19.dev/drivers/serial/dz.c +--- linux-2.6.19.old/drivers/serial/dz.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/dz.c 2006-12-14 03:12:59.000000000 +0100 +@@ -767,7 +767,11 @@ + static struct uart_driver dz_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++#ifdef CONFIG_DEVFS ++ .dev_name = "tts/%d", ++#else + .dev_name = "ttyS%d", ++#endif + .major = TTY_MAJOR, + .minor = 64, + .nr = DZ_NB_PORT, +diff -urN linux-2.6.19.old/drivers/serial/imx.c linux-2.6.19.dev/drivers/serial/imx.c +--- linux-2.6.19.old/drivers/serial/imx.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/imx.c 2006-12-14 03:12:59.000000000 +0100 +@@ -887,6 +887,7 @@ + .owner = THIS_MODULE, + .driver_name = DRIVER_NAME, + .dev_name = "ttySMX", ++ .devfs_name = "ttsmx/", + .major = SERIAL_IMX_MAJOR, + .minor = MINOR_START, + .nr = ARRAY_SIZE(imx_ports), +diff -urN linux-2.6.19.old/drivers/serial/ip22zilog.c linux-2.6.19.dev/drivers/serial/ip22zilog.c +--- linux-2.6.19.old/drivers/serial/ip22zilog.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/ip22zilog.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1082,6 +1082,7 @@ + static struct uart_driver ip22zilog_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, +diff -urN linux-2.6.19.old/drivers/serial/m32r_sio.c linux-2.6.19.dev/drivers/serial/m32r_sio.c +--- linux-2.6.19.old/drivers/serial/m32r_sio.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/m32r_sio.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1127,6 +1127,7 @@ + static struct uart_driver m32r_sio_reg = { + .owner = THIS_MODULE, + .driver_name = "sio", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, +diff -urN linux-2.6.19.old/drivers/serial/mcfserial.c linux-2.6.19.dev/drivers/serial/mcfserial.c +--- linux-2.6.19.old/drivers/serial/mcfserial.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/mcfserial.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1713,6 +1713,7 @@ + /* Initialize the tty_driver structure */ + mcfrs_serial_driver->owner = THIS_MODULE; + mcfrs_serial_driver->name = "ttyS"; ++ mcfrs_serial_driver->devfs_name = "ttys/"; + mcfrs_serial_driver->driver_name = "serial"; + mcfrs_serial_driver->major = TTY_MAJOR; + mcfrs_serial_driver->minor_start = 64; +diff -urN linux-2.6.19.old/drivers/serial/mpc52xx_uart.c linux-2.6.19.dev/drivers/serial/mpc52xx_uart.c +--- linux-2.6.19.old/drivers/serial/mpc52xx_uart.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/mpc52xx_uart.c 2006-12-14 03:12:59.000000000 +0100 +@@ -693,6 +693,7 @@ + .owner = THIS_MODULE, + .driver_name = "mpc52xx_psc_uart", + .dev_name = "ttyPSC", ++ .devfs_name = "ttyPSC", + .major = SERIAL_PSC_MAJOR, + .minor = SERIAL_PSC_MINOR, + .nr = MPC52xx_PSC_MAXNUM, +diff -urN linux-2.6.19.old/drivers/serial/mpsc.c linux-2.6.19.dev/drivers/serial/mpsc.c +--- linux-2.6.19.old/drivers/serial/mpsc.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/mpsc.c 2006-12-14 03:12:59.000000000 +0100 +@@ -314,6 +314,7 @@ + #define MPSC_MAJOR 204 + #define MPSC_MINOR_START 44 + #define MPSC_DRIVER_NAME "MPSC" ++#define MPSC_DEVFS_NAME "ttymm/" + #define MPSC_DEV_NAME "ttyMM" + #define MPSC_VERSION "1.00" + +@@ -1861,6 +1862,7 @@ + static struct uart_driver mpsc_reg = { + .owner = THIS_MODULE, + .driver_name = MPSC_DRIVER_NAME, ++ .devfs_name = MPSC_DEVFS_NAME, + .dev_name = MPSC_DEV_NAME, + .major = MPSC_MAJOR, + .minor = MPSC_MINOR_START, +diff -urN linux-2.6.19.old/drivers/serial/pmac_zilog.c linux-2.6.19.dev/drivers/serial/pmac_zilog.c +--- linux-2.6.19.old/drivers/serial/pmac_zilog.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/pmac_zilog.c 2006-12-14 03:12:59.000000000 +0100 +@@ -100,6 +100,7 @@ + static struct uart_driver pmz_uart_reg = { + .owner = THIS_MODULE, + .driver_name = "ttyS", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/pxa.c linux-2.6.19.dev/drivers/serial/pxa.c +--- linux-2.6.19.old/drivers/serial/pxa.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/pxa.c 2006-12-14 03:12:59.000000000 +0100 +@@ -777,6 +777,7 @@ + static struct uart_driver serial_pxa_reg = { + .owner = THIS_MODULE, + .driver_name = "PXA serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, +diff -urN linux-2.6.19.old/drivers/serial/s3c2410.c linux-2.6.19.dev/drivers/serial/s3c2410.c +--- linux-2.6.19.old/drivers/serial/s3c2410.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/s3c2410.c 2006-12-14 03:12:59.000000000 +0100 +@@ -148,6 +148,7 @@ + /* UART name and device definitions */ + + #define S3C24XX_SERIAL_NAME "ttySAC" ++#define S3C24XX_SERIAL_DEVFS "tts/" + #define S3C24XX_SERIAL_MAJOR 204 + #define S3C24XX_SERIAL_MINOR 64 + +@@ -950,6 +951,7 @@ + .nr = 3, + .cons = S3C24XX_SERIAL_CONSOLE, + .driver_name = S3C24XX_SERIAL_NAME, ++ .devfs_name = S3C24XX_SERIAL_DEVFS, + .major = S3C24XX_SERIAL_MAJOR, + .minor = S3C24XX_SERIAL_MINOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/sa1100.c linux-2.6.19.dev/drivers/serial/sa1100.c +--- linux-2.6.19.old/drivers/serial/sa1100.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sa1100.c 2006-12-14 03:12:59.000000000 +0100 +@@ -815,6 +815,7 @@ + .owner = THIS_MODULE, + .driver_name = "ttySA", + .dev_name = "ttySA", ++ .devfs_name = "ttySA", + .major = SERIAL_SA1100_MAJOR, + .minor = MINOR_START, + .nr = NR_PORTS, +diff -urN linux-2.6.19.old/drivers/serial/serial_core.c linux-2.6.19.dev/drivers/serial/serial_core.c +--- linux-2.6.19.old/drivers/serial/serial_core.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/serial_core.c 2006-12-14 03:12:59.000000000 +0100 +@@ -2182,6 +2182,7 @@ + + normal->owner = drv->owner; + normal->driver_name = drv->driver_name; ++ normal->devfs_name = drv->devfs_name; + normal->name = drv->dev_name; + normal->major = drv->major; + normal->minor_start = drv->minor; +@@ -2189,7 +2190,7 @@ + normal->subtype = SERIAL_TYPE_NORMAL; + normal->init_termios = tty_std_termios; + normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; +- normal->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ normal->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + normal->driver_state = drv; + tty_set_operations(normal, &uart_ops); + +diff -urN linux-2.6.19.old/drivers/serial/serial_txx9.c linux-2.6.19.dev/drivers/serial/serial_txx9.c +--- linux-2.6.19.old/drivers/serial/serial_txx9.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/serial_txx9.c 2006-12-14 03:12:59.000000000 +0100 +@@ -68,10 +68,12 @@ + #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) + /* "ttyS" is used for standard serial driver */ + #define TXX9_TTY_NAME "ttyTX" ++#define TXX9_TTY_DEVFS_NAME "tttx/" + #define TXX9_TTY_MINOR_START (64 + 64) /* ttyTX0(128), ttyTX1(129) */ + #else + /* acts like standard serial driver */ + #define TXX9_TTY_NAME "ttyS" ++#define TXX9_TTY_DEVFS_NAME "tts/" + #define TXX9_TTY_MINOR_START 64 + #endif + #define TXX9_TTY_MAJOR TTY_MAJOR +@@ -968,6 +970,7 @@ + static struct uart_driver serial_txx9_reg = { + .owner = THIS_MODULE, + .driver_name = "serial_txx9", ++ .devfs_name = TXX9_TTY_DEVFS_NAME, + .dev_name = TXX9_TTY_NAME, + .major = TXX9_TTY_MAJOR, + .minor = TXX9_TTY_MINOR_START, +diff -urN linux-2.6.19.old/drivers/serial/sh-sci.c linux-2.6.19.dev/drivers/serial/sh-sci.c +--- linux-2.6.19.old/drivers/serial/sh-sci.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sh-sci.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1320,6 +1320,9 @@ + static struct uart_driver sci_uart_driver = { + .owner = THIS_MODULE, + .driver_name = "sci", ++#ifdef CONFIG_DEVFS_FS ++ .devfs_name = "ttsc/", ++#endif + .dev_name = "ttySC", + .major = SCI_MAJOR, + .minor = SCI_MINOR_START, +diff -urN linux-2.6.19.old/drivers/serial/sunhv.c linux-2.6.19.dev/drivers/serial/sunhv.c +--- linux-2.6.19.old/drivers/serial/sunhv.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sunhv.c 2006-12-14 03:12:59.000000000 +0100 +@@ -353,6 +353,7 @@ + static struct uart_driver sunhv_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/sunsab.c linux-2.6.19.dev/drivers/serial/sunsab.c +--- linux-2.6.19.old/drivers/serial/sunsab.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sunsab.c 2006-12-14 03:12:59.000000000 +0100 +@@ -849,6 +849,7 @@ + static struct uart_driver sunsab_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/sunsu.c linux-2.6.19.dev/drivers/serial/sunsu.c +--- linux-2.6.19.old/drivers/serial/sunsu.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sunsu.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1175,6 +1175,7 @@ + static struct uart_driver sunsu_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/sunzilog.c linux-2.6.19.dev/drivers/serial/sunzilog.c +--- linux-2.6.19.old/drivers/serial/sunzilog.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/sunzilog.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1006,6 +1006,7 @@ + static struct uart_driver sunzilog_reg = { + .owner = THIS_MODULE, + .driver_name = "ttyS", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + }; +diff -urN linux-2.6.19.old/drivers/serial/v850e_uart.c linux-2.6.19.dev/drivers/serial/v850e_uart.c +--- linux-2.6.19.old/drivers/serial/v850e_uart.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/v850e_uart.c 2006-12-14 03:12:59.000000000 +0100 +@@ -468,6 +468,7 @@ + static struct uart_driver v850e_uart_driver = { + .owner = THIS_MODULE, + .driver_name = "v850e_uart", ++ .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = V850E_UART_MINOR_BASE, +diff -urN linux-2.6.19.old/drivers/serial/vr41xx_siu.c linux-2.6.19.dev/drivers/serial/vr41xx_siu.c +--- linux-2.6.19.old/drivers/serial/vr41xx_siu.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/serial/vr41xx_siu.c 2006-12-14 03:12:59.000000000 +0100 +@@ -910,6 +910,7 @@ + .owner = THIS_MODULE, + .driver_name = "SIU", + .dev_name = "ttyVR", ++ .devfs_name = "ttvr/", + .major = SIU_MAJOR, + .minor = SIU_MINOR_BASE, + .cons = SERIAL_VR41XX_CONSOLE, +diff -urN linux-2.6.19.old/drivers/tc/zs.c linux-2.6.19.dev/drivers/tc/zs.c +--- linux-2.6.19.old/drivers/tc/zs.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/tc/zs.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1744,6 +1744,7 @@ + /* Not all of this is exactly right for us. */ + + serial_driver->owner = THIS_MODULE; ++ serial_driver->devfs_name = "tts/"; + serial_driver->name = "ttyS"; + serial_driver->major = TTY_MAJOR; + serial_driver->minor_start = 64; +@@ -1752,7 +1753,7 @@ + serial_driver->init_termios = tty_std_termios; + serial_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; +- serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + tty_set_operations(serial_driver, &serial_ops); + + if (tty_register_driver(serial_driver)) +diff -urN linux-2.6.19.old/drivers/telephony/phonedev.c linux-2.6.19.dev/drivers/telephony/phonedev.c +--- linux-2.6.19.old/drivers/telephony/phonedev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/telephony/phonedev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -28,6 +28,7 @@ + + #include <linux/kmod.h> + #include <linux/sem.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/mutex.h> + + #define PHONE_NUM_DEVICES 256 +@@ -105,6 +106,8 @@ + if (phone_device[i] == NULL) { + phone_device[i] = p; + p->minor = i; ++ devfs_mk_cdev(MKDEV(PHONE_MAJOR,i), ++ S_IFCHR|S_IRUSR|S_IWUSR, "phone/%d", i); + mutex_unlock(&phone_lock); + return 0; + } +@@ -122,6 +125,7 @@ + mutex_lock(&phone_lock); + if (phone_device[pfd->minor] != pfd) + panic("phone: bad unregister"); ++ devfs_remove("phone/%d", pfd->minor); + phone_device[pfd->minor] = NULL; + mutex_unlock(&phone_lock); + } +diff -urN linux-2.6.19.old/drivers/usb/class/cdc-acm.c linux-2.6.19.dev/drivers/usb/class/cdc-acm.c +--- linux-2.6.19.old/drivers/usb/class/cdc-acm.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/usb/class/cdc-acm.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1151,11 +1151,12 @@ + acm_tty_driver->owner = THIS_MODULE, + acm_tty_driver->driver_name = "acm", + acm_tty_driver->name = "ttyACM", ++ acm_tty_driver->devfs_name = "usb/acm/", + acm_tty_driver->major = ACM_TTY_MAJOR, + acm_tty_driver->minor_start = 0, + acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, + acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, +- acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS, + acm_tty_driver->init_termios = tty_std_termios; + acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(acm_tty_driver, &acm_ops); +diff -urN linux-2.6.19.old/drivers/usb/gadget/serial.c linux-2.6.19.dev/drivers/usb/gadget/serial.c +--- linux-2.6.19.old/drivers/usb/gadget/serial.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/usb/gadget/serial.c 2006-12-14 03:12:59.000000000 +0100 +@@ -587,11 +587,12 @@ + gs_tty_driver->owner = THIS_MODULE; + gs_tty_driver->driver_name = GS_SHORT_NAME; + gs_tty_driver->name = "ttygs"; ++ gs_tty_driver->devfs_name = "usb/ttygs/"; + gs_tty_driver->major = GS_MAJOR; + gs_tty_driver->minor_start = GS_MINOR_START; + gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + gs_tty_driver->subtype = SERIAL_TYPE_NORMAL; +- gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + gs_tty_driver->init_termios = tty_std_termios; + gs_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(gs_tty_driver, &gs_tty_ops); +diff -urN linux-2.6.19.old/drivers/usb/serial/usb-serial.c linux-2.6.19.dev/drivers/usb/serial/usb-serial.c +--- linux-2.6.19.old/drivers/usb/serial/usb-serial.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/usb/serial/usb-serial.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1055,12 +1055,13 @@ + + usb_serial_tty_driver->owner = THIS_MODULE; + usb_serial_tty_driver->driver_name = "usbserial"; ++ usb_serial_tty_driver->devfs_name = "usb/tts/"; + usb_serial_tty_driver->name = "ttyUSB"; + usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; + usb_serial_tty_driver->minor_start = 0; + usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; +- usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + usb_serial_tty_driver->init_termios = tty_std_termios; + usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(usb_serial_tty_driver, &serial_ops); +diff -urN linux-2.6.19.old/drivers/video/fbmem.c linux-2.6.19.dev/drivers/video/fbmem.c +--- linux-2.6.19.old/drivers/video/fbmem.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/drivers/video/fbmem.c 2006-12-14 03:12:59.000000000 +0100 +@@ -31,6 +31,7 @@ + #ifdef CONFIG_KMOD + #include <linux/kmod.h> + #endif ++#include <linux/devfs_fs_kernel.h> + #include <linux/err.h> + #include <linux/device.h> + #include <linux/efi.h> +@@ -1324,6 +1325,8 @@ + fb_add_videomode(&mode, &fb_info->modelist); + registered_fb[i] = fb_info; + ++ devfs_mk_cdev(MKDEV(FB_MAJOR, i), ++ S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); + event.info = fb_info; + fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); + return 0; +@@ -1349,6 +1352,7 @@ + i = fb_info->node; + if (!registered_fb[i]) + return -EINVAL; ++ devfs_remove("fb/%d", i); + + if (fb_info->pixmap.addr && + (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) +@@ -1400,6 +1404,7 @@ + { + create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); + ++ devfs_mk_dir("fb"); + if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) + printk("unable to get major %d for fb devs\n", FB_MAJOR); + +diff -urN linux-2.6.19.old/fs/block_dev.c linux-2.6.19.dev/fs/block_dev.c +--- linux-2.6.19.old/fs/block_dev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/block_dev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -11,6 +11,7 @@ + #include <linux/slab.h> + #include <linux/kmod.h> + #include <linux/major.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/smp_lock.h> + #include <linux/highmem.h> + #include <linux/blkdev.h> +diff -urN linux-2.6.19.old/fs/char_dev.c linux-2.6.19.dev/fs/char_dev.c +--- linux-2.6.19.old/fs/char_dev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/char_dev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -13,6 +13,7 @@ + #include <linux/errno.h> + #include <linux/module.h> + #include <linux/smp_lock.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/seq_file.h> + + #include <linux/kobject.h> +diff -urN linux-2.6.19.old/fs/coda/psdev.c linux-2.6.19.dev/fs/coda/psdev.c +--- linux-2.6.19.old/fs/coda/psdev.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/coda/psdev.c 2006-12-14 03:12:59.000000000 +0100 +@@ -28,6 +28,7 @@ + #include <linux/delay.h> + #include <linux/skbuff.h> + #include <linux/proc_fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/vmalloc.h> + #include <linux/fs.h> + #include <linux/file.h> +@@ -364,12 +365,22 @@ + err = PTR_ERR(coda_psdev_class); + goto out_chrdev; + } +- for (i = 0; i < MAX_CODADEVS; i++) ++ devfs_mk_dir ("coda"); ++ for (i = 0; i < MAX_CODADEVS; i++) { + class_device_create(coda_psdev_class, NULL, + MKDEV(CODA_PSDEV_MAJOR,i), NULL, "cfs%d", i); ++ err = devfs_mk_cdev(MKDEV(CODA_PSDEV_MAJOR, i), ++ S_IFCHR|S_IRUSR|S_IWUSR, "coda/%d", i); ++ if (err) ++ goto out_class; ++ } + coda_sysctl_init(); + goto out; + ++out_class: ++ for (i = 0; i < MAX_CODADEVS; i++) ++ class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); ++ class_destroy(coda_psdev_class); + out_chrdev: + unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); + out: +@@ -408,9 +419,12 @@ + } + return 0; + out: +- for (i = 0; i < MAX_CODADEVS; i++) ++ for (i = 0; i < MAX_CODADEVS; i++) { + class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); ++ devfs_remove("coda/%d", i); ++ } + class_destroy(coda_psdev_class); ++ devfs_remove("coda"); + unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); + coda_sysctl_clean(); + out1: +@@ -427,9 +441,12 @@ + if ( err != 0 ) { + printk("coda: failed to unregister filesystem\n"); + } +- for (i = 0; i < MAX_CODADEVS; i++) ++ for (i = 0; i < MAX_CODADEVS; i++) { + class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); ++ devfs_remove("coda/%d", i); ++ } + class_destroy(coda_psdev_class); ++ devfs_remove("coda"); + unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); + coda_sysctl_clean(); + coda_destroy_inodecache(); +diff -urN linux-2.6.19.old/fs/compat_ioctl.c linux-2.6.19.dev/fs/compat_ioctl.c +--- linux-2.6.19.old/fs/compat_ioctl.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/compat_ioctl.c 2006-12-14 03:12:59.000000000 +0100 +@@ -42,6 +42,7 @@ + #include <linux/cdrom.h> + #include <linux/auto_fs.h> + #include <linux/auto_fs4.h> ++#include <linux/devfs_fs.h> + #include <linux/tty.h> + #include <linux/vt_kern.h> + #include <linux/fb.h> +diff -urN linux-2.6.19.old/fs/devfs/base.c linux-2.6.19.dev/fs/devfs/base.c +--- linux-2.6.19.old/fs/devfs/base.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/fs/devfs/base.c 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,2835 @@ ++/* devfs (Device FileSystem) driver. ++ ++ Copyright (C) 1998-2002 Richard Gooch ++ ++ This library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Library General Public ++ License as published by the Free Software Foundation; either ++ version 2 of the License, or (at your option) any later version. ++ ++ This library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Library General Public License for more details. ++ ++ You should have received a copy of the GNU Library General Public ++ License along with this library; if not, write to the Free ++ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ++ ++ Richard Gooch may be reached by email at rgooch@atnf.csiro.au ++ The postal address is: ++ Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia. ++ ++ ChangeLog ++ ++ 19980110 Richard Gooch <rgooch@atnf.csiro.au> ++ Original version. ++ v0.1 ++ 19980111 Richard Gooch <rgooch@atnf.csiro.au> ++ Created per-fs inode table rather than using inode->u.generic_ip ++ v0.2 ++ 19980111 Richard Gooch <rgooch@atnf.csiro.au> ++ Created .epoch inode which has a ctime of 0. ++ Fixed loss of named pipes when dentries lost. ++ Fixed loss of inode data when devfs_register() follows mknod(). ++ v0.3 ++ 19980111 Richard Gooch <rgooch@atnf.csiro.au> ++ Fix for when compiling with CONFIG_KERNELD. ++ 19980112 Richard Gooch <rgooch@atnf.csiro.au> ++ Fix for readdir() which sometimes didn't show entries. ++ Added <<tolerant>> option to <devfs_register>. ++ v0.4 ++ 19980113 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_fill_file> function. ++ v0.5 ++ 19980115 Richard Gooch <rgooch@atnf.csiro.au> ++ Added subdirectory support. Major restructuring. ++ 19980116 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed <find_by_dev> to not search major=0,minor=0. ++ Added symlink support. ++ v0.6 ++ 19980120 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_mk_dir> function and support directory unregister ++ 19980120 Richard Gooch <rgooch@atnf.csiro.au> ++ Auto-ownership uses real uid/gid rather than effective uid/gid. ++ v0.7 ++ 19980121 Richard Gooch <rgooch@atnf.csiro.au> ++ Supported creation of sockets. ++ v0.8 ++ 19980122 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFS_FL_HIDE_UNREG flag. ++ Interface change to <devfs_mk_symlink>. ++ Created <devfs_symlink> to support symlink(2). ++ v0.9 ++ 19980123 Richard Gooch <rgooch@atnf.csiro.au> ++ Added check to <devfs_fill_file> to check inode is in devfs. ++ Added optional traversal of symlinks. ++ v0.10 ++ 19980124 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_flags> and <devfs_set_flags>. ++ v0.11 ++ 19980125 C. Scott Ananian <cananian@alumni.princeton.edu> ++ Created <devfs_find_handle>. ++ 19980125 Richard Gooch <rgooch@atnf.csiro.au> ++ Allow removal of symlinks. ++ v0.12 ++ 19980125 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_set_symlink_destination>. ++ 19980126 Richard Gooch <rgooch@atnf.csiro.au> ++ Moved DEVFS_SUPER_MAGIC into header file. ++ Added DEVFS_FL_HIDE flag. ++ Created <devfs_get_maj_min>. ++ Created <devfs_get_handle_from_inode>. ++ Fixed minor bug in <find_by_dev>. ++ 19980127 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed interface to <find_by_dev>, <find_entry>, ++ <devfs_unregister>, <devfs_fill_file> and <devfs_find_handle>. ++ Fixed inode times when symlink created with symlink(2). ++ v0.13 ++ 19980129 C. Scott Ananian <cananian@alumni.princeton.edu> ++ Exported <devfs_set_symlink_destination>, <devfs_get_maj_min> ++ and <devfs_get_handle_from_inode>. ++ 19980129 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_unlink> to support unlink(2). ++ v0.14 ++ 19980129 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed kerneld support for entries in devfs subdirectories. ++ 19980130 Richard Gooch <rgooch@atnf.csiro.au> ++ Bugfixes in <call_kerneld>. ++ v0.15 ++ 19980207 Richard Gooch <rgooch@atnf.csiro.au> ++ Call kerneld when looking up unregistered entries. ++ v0.16 ++ 19980326 Richard Gooch <rgooch@atnf.csiro.au> ++ Modified interface to <devfs_find_handle> for symlink traversal. ++ v0.17 ++ 19980331 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed persistence bug with device numbers for manually created ++ device files. ++ Fixed problem with recreating symlinks with different content. ++ v0.18 ++ 19980401 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed to CONFIG_KMOD. ++ Hide entries which are manually unlinked. ++ Always invalidate devfs dentry cache when registering entries. ++ Created <devfs_rmdir> to support rmdir(2). ++ Ensure directories created by <devfs_mk_dir> are visible. ++ v0.19 ++ 19980402 Richard Gooch <rgooch@atnf.csiro.au> ++ Invalidate devfs dentry cache when making directories. ++ Invalidate devfs dentry cache when removing entries. ++ Fixed persistence bug with fifos. ++ v0.20 ++ 19980421 Richard Gooch <rgooch@atnf.csiro.au> ++ Print process command when debugging kerneld/kmod. ++ Added debugging for register/unregister/change operations. ++ 19980422 Richard Gooch <rgooch@atnf.csiro.au> ++ Added "devfs=" boot options. ++ v0.21 ++ 19980426 Richard Gooch <rgooch@atnf.csiro.au> ++ No longer lock/unlock superblock in <devfs_put_super>. ++ Drop negative dentries when they are released. ++ Manage dcache more efficiently. ++ v0.22 ++ 19980427 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFS_FL_AUTO_DEVNUM flag. ++ v0.23 ++ 19980430 Richard Gooch <rgooch@atnf.csiro.au> ++ No longer set unnecessary methods. ++ v0.24 ++ 19980504 Richard Gooch <rgooch@atnf.csiro.au> ++ Added PID display to <call_kerneld> debugging message. ++ Added "after" debugging message to <call_kerneld>. ++ 19980519 Richard Gooch <rgooch@atnf.csiro.au> ++ Added "diread" and "diwrite" boot options. ++ 19980520 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed persistence problem with permissions. ++ v0.25 ++ 19980602 Richard Gooch <rgooch@atnf.csiro.au> ++ Support legacy device nodes. ++ Fixed bug where recreated inodes were hidden. ++ v0.26 ++ 19980602 Richard Gooch <rgooch@atnf.csiro.au> ++ Improved debugging in <get_vfs_inode>. ++ 19980607 Richard Gooch <rgooch@atnf.csiro.au> ++ No longer free old dentries in <devfs_mk_dir>. ++ Free all dentries for a given entry when deleting inodes. ++ v0.27 ++ 19980627 Richard Gooch <rgooch@atnf.csiro.au> ++ Limit auto-device numbering to majors 128 to 239. ++ v0.28 ++ 19980629 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed inode times persistence problem. ++ v0.29 ++ 19980704 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed spelling in <devfs_readlink> debug. ++ Fixed bug in <devfs_setup> parsing "dilookup". ++ v0.30 ++ 19980705 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed devfs inode leak when manually recreating inodes. ++ Fixed permission persistence problem when recreating inodes. ++ v0.31 ++ 19980727 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed harmless "unused variable" compiler warning. ++ Fixed modes for manually recreated device nodes. ++ v0.32 ++ 19980728 Richard Gooch <rgooch@atnf.csiro.au> ++ Added NULL devfs inode warning in <devfs_read_inode>. ++ Force all inode nlink values to 1. ++ v0.33 ++ 19980730 Richard Gooch <rgooch@atnf.csiro.au> ++ Added "dimknod" boot option. ++ Set inode nlink to 0 when freeing dentries. ++ Fixed modes for manually recreated symlinks. ++ v0.34 ++ 19980802 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bugs in recreated directories and symlinks. ++ v0.35 ++ 19980806 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bugs in recreated device nodes. ++ 19980807 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in currently unused <devfs_get_handle_from_inode>. ++ Defined new <devfs_handle_t> type. ++ Improved debugging when getting entries. ++ Fixed bug where directories could be emptied. ++ v0.36 ++ 19980809 Richard Gooch <rgooch@atnf.csiro.au> ++ Replaced dummy .epoch inode with .devfsd character device. ++ 19980810 Richard Gooch <rgooch@atnf.csiro.au> ++ Implemented devfsd protocol revision 0. ++ v0.37 ++ 19980819 Richard Gooch <rgooch@atnf.csiro.au> ++ Added soothing message to warning in <devfs_d_iput>. ++ v0.38 ++ 19980829 Richard Gooch <rgooch@atnf.csiro.au> ++ Use GCC extensions for structure initialisations. ++ Implemented async open notification. ++ Incremented devfsd protocol revision to 1. ++ v0.39 ++ 19980908 Richard Gooch <rgooch@atnf.csiro.au> ++ Moved async open notification to end of <devfs_open>. ++ v0.40 ++ 19980910 Richard Gooch <rgooch@atnf.csiro.au> ++ Prepended "/dev/" to module load request. ++ Renamed <call_kerneld> to <call_kmod>. ++ v0.41 ++ 19980910 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed typo "AYSNC" -> "ASYNC". ++ v0.42 ++ 19980910 Richard Gooch <rgooch@atnf.csiro.au> ++ Added open flag for files. ++ v0.43 ++ 19980927 Richard Gooch <rgooch@atnf.csiro.au> ++ Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode>. ++ v0.44 ++ 19981005 Richard Gooch <rgooch@atnf.csiro.au> ++ Added test for empty <<name>> in <devfs_find_handle>. ++ Renamed <generate_path> to <devfs_generate_path> and published. ++ v0.45 ++ 19981006 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_fops>. ++ v0.46 ++ 19981007 Richard Gooch <rgooch@atnf.csiro.au> ++ Limit auto-device numbering to majors 144 to 239. ++ v0.47 ++ 19981010 Richard Gooch <rgooch@atnf.csiro.au> ++ Updated <devfs_follow_link> for VFS change in 2.1.125. ++ v0.48 ++ 19981022 Richard Gooch <rgooch@atnf.csiro.au> ++ Created DEVFS_ FL_COMPAT flag. ++ v0.49 ++ 19981023 Richard Gooch <rgooch@atnf.csiro.au> ++ Created "nocompat" boot option. ++ v0.50 ++ 19981025 Richard Gooch <rgooch@atnf.csiro.au> ++ Replaced "mount" boot option with "nomount". ++ v0.51 ++ 19981110 Richard Gooch <rgooch@atnf.csiro.au> ++ Created "only" boot option. ++ v0.52 ++ 19981112 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFS_FL_REMOVABLE flag. ++ v0.53 ++ 19981114 Richard Gooch <rgooch@atnf.csiro.au> ++ Only call <scan_dir_for_removable> on first call to ++ <devfs_readdir>. ++ v0.54 ++ 19981205 Richard Gooch <rgooch@atnf.csiro.au> ++ Updated <devfs_rmdir> for VFS change in 2.1.131. ++ v0.55 ++ 19981218 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_mk_compat>. ++ 19981220 Richard Gooch <rgooch@atnf.csiro.au> ++ Check for partitions on removable media in <devfs_lookup>. ++ v0.56 ++ 19990118 Richard Gooch <rgooch@atnf.csiro.au> ++ Added support for registering regular files. ++ Created <devfs_set_file_size>. ++ Update devfs inodes from entries if not changed through FS. ++ v0.57 ++ 19990124 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed <devfs_fill_file> to only initialise temporary inodes. ++ Trap for NULL fops in <devfs_register>. ++ Return -ENODEV in <devfs_fill_file> for non-driver inodes. ++ v0.58 ++ 19990126 Richard Gooch <rgooch@atnf.csiro.au> ++ Switched from PATH_MAX to DEVFS_PATHLEN. ++ v0.59 ++ 19990127 Richard Gooch <rgooch@atnf.csiro.au> ++ Created "nottycompat" boot option. ++ v0.60 ++ 19990318 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed <devfsd_read> to not overrun event buffer. ++ v0.61 ++ 19990329 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_auto_unregister>. ++ v0.62 ++ 19990330 Richard Gooch <rgooch@atnf.csiro.au> ++ Don't return unregistred entries in <devfs_find_handle>. ++ Panic in <devfs_unregister> if entry unregistered. ++ 19990401 Richard Gooch <rgooch@atnf.csiro.au> ++ Don't panic in <devfs_auto_unregister> for duplicates. ++ v0.63 ++ 19990402 Richard Gooch <rgooch@atnf.csiro.au> ++ Don't unregister already unregistered entries in <unregister>. ++ v0.64 ++ 19990510 Richard Gooch <rgooch@atnf.csiro.au> ++ Disable warning messages when unable to read partition table for ++ removable media. ++ v0.65 ++ 19990512 Richard Gooch <rgooch@atnf.csiro.au> ++ Updated <devfs_lookup> for VFS change in 2.3.1-pre1. ++ Created "oops-on-panic" boot option. ++ Improved debugging in <devfs_register> and <devfs_unregister>. ++ v0.66 ++ 19990519 Richard Gooch <rgooch@atnf.csiro.au> ++ Added documentation for some functions. ++ 19990525 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed "oops-on-panic" boot option: now always Oops. ++ v0.67 ++ 19990531 Richard Gooch <rgooch@atnf.csiro.au> ++ Improved debugging in <devfs_register>. ++ v0.68 ++ 19990604 Richard Gooch <rgooch@atnf.csiro.au> ++ Added "diunlink" and "nokmod" boot options. ++ Removed superfluous warning message in <devfs_d_iput>. ++ v0.69 ++ 19990611 Richard Gooch <rgooch@atnf.csiro.au> ++ Took account of change to <d_alloc_root>. ++ v0.70 ++ 19990614 Richard Gooch <rgooch@atnf.csiro.au> ++ Created separate event queue for each mounted devfs. ++ Removed <devfs_invalidate_dcache>. ++ Created new ioctl()s. ++ Incremented devfsd protocol revision to 3. ++ Fixed bug when re-creating directories: contents were lost. ++ Block access to inodes until devfsd updates permissions. ++ 19990615 Richard Gooch <rgooch@atnf.csiro.au> ++ Support 2.2.x kernels. ++ v0.71 ++ 19990623 Richard Gooch <rgooch@atnf.csiro.au> ++ Switched to sending process uid/gid to devfsd. ++ Renamed <call_kmod> to <try_modload>. ++ Added DEVFSD_NOTIFY_LOOKUP event. ++ 19990624 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFSD_NOTIFY_CHANGE event. ++ Incremented devfsd protocol revision to 4. ++ v0.72 ++ 19990713 Richard Gooch <rgooch@atnf.csiro.au> ++ Return EISDIR rather than EINVAL for read(2) on directories. ++ v0.73 ++ 19990809 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed <devfs_setup> to new __init scheme. ++ v0.74 ++ 19990901 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed remaining function declarations to new __init scheme. ++ v0.75 ++ 19991013 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_info>, <devfs_set_info>, ++ <devfs_get_first_child> and <devfs_get_next_sibling>. ++ Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>, ++ <devfs_mk_dir> and <devfs_find_handle>. ++ Work sponsored by SGI. ++ v0.76 ++ 19991017 Richard Gooch <rgooch@atnf.csiro.au> ++ Allow multiple unregistrations. ++ Work sponsored by SGI. ++ v0.77 ++ 19991026 Richard Gooch <rgooch@atnf.csiro.au> ++ Added major and minor number to devfsd protocol. ++ Incremented devfsd protocol revision to 5. ++ Work sponsored by SGI. ++ v0.78 ++ 19991030 Richard Gooch <rgooch@atnf.csiro.au> ++ Support info pointer for all devfs entry types. ++ Added <<info>> parameter to <devfs_mk_dir> and ++ <devfs_mk_symlink>. ++ Work sponsored by SGI. ++ v0.79 ++ 19991031 Richard Gooch <rgooch@atnf.csiro.au> ++ Support "../" when searching devfs namespace. ++ Work sponsored by SGI. ++ v0.80 ++ 19991101 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_unregister_slave>. ++ Work sponsored by SGI. ++ v0.81 ++ 19991103 Richard Gooch <rgooch@atnf.csiro.au> ++ Exported <devfs_get_parent>. ++ Work sponsored by SGI. ++ v0.82 ++ 19991104 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed unused <devfs_set_symlink_destination>. ++ 19991105 Richard Gooch <rgooch@atnf.csiro.au> ++ Do not hide entries from devfsd or children. ++ Removed DEVFS_ FL_TTY_COMPAT flag. ++ Removed "nottycompat" boot option. ++ Removed <devfs_mk_compat>. ++ Work sponsored by SGI. ++ v0.83 ++ 19991107 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFS_FL_WAIT flag. ++ Work sponsored by SGI. ++ v0.84 ++ 19991107 Richard Gooch <rgooch@atnf.csiro.au> ++ Support new "disc" naming scheme in <get_removable_partition>. ++ Allow NULL fops in <devfs_register>. ++ Work sponsored by SGI. ++ v0.85 ++ 19991110 Richard Gooch <rgooch@atnf.csiro.au> ++ Fall back to major table if NULL fops given to <devfs_register>. ++ Work sponsored by SGI. ++ v0.86 ++ 19991204 Richard Gooch <rgooch@atnf.csiro.au> ++ Support fifos when unregistering. ++ Work sponsored by SGI. ++ v0.87 ++ 19991209 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed obsolete DEVFS_ FL_COMPAT and DEVFS_ FL_TOLERANT flags. ++ Work sponsored by SGI. ++ v0.88 ++ 19991214 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed kmod support. ++ Work sponsored by SGI. ++ v0.89 ++ 19991216 Richard Gooch <rgooch@atnf.csiro.au> ++ Improved debugging in <get_vfs_inode>. ++ Ensure dentries created by devfsd will be cleaned up. ++ Work sponsored by SGI. ++ v0.90 ++ 19991223 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_name>. ++ Work sponsored by SGI. ++ v0.91 ++ 20000203 Richard Gooch <rgooch@atnf.csiro.au> ++ Ported to kernel 2.3.42. ++ Removed <devfs_fill_file>. ++ Work sponsored by SGI. ++ v0.92 ++ 20000306 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFS_ FL_NO_PERSISTENCE flag. ++ Removed unnecessary call to <update_devfs_inode_from_entry> in ++ <devfs_readdir>. ++ Work sponsored by SGI. ++ v0.93 ++ 20000413 Richard Gooch <rgooch@atnf.csiro.au> ++ Set inode->i_size to correct size for symlinks. ++ 20000414 Richard Gooch <rgooch@atnf.csiro.au> ++ Only give lookup() method to directories to comply with new VFS ++ assumptions. ++ Work sponsored by SGI. ++ 20000415 Richard Gooch <rgooch@atnf.csiro.au> ++ Remove unnecessary tests in symlink methods. ++ Don't kill existing block ops in <devfs_read_inode>. ++ Work sponsored by SGI. ++ v0.94 ++ 20000424 Richard Gooch <rgooch@atnf.csiro.au> ++ Don't create missing directories in <devfs_find_handle>. ++ Work sponsored by SGI. ++ v0.95 ++ 20000430 Richard Gooch <rgooch@atnf.csiro.au> ++ Added CONFIG_DEVFS_MOUNT. ++ Work sponsored by SGI. ++ v0.96 ++ 20000608 Richard Gooch <rgooch@atnf.csiro.au> ++ Disabled multi-mount capability (use VFS bindings instead). ++ Work sponsored by SGI. ++ v0.97 ++ 20000610 Richard Gooch <rgooch@atnf.csiro.au> ++ Switched to FS_SINGLE to disable multi-mounts. ++ 20000612 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed module support. ++ Removed multi-mount code. ++ Removed compatibility macros: VFS has changed too much. ++ Work sponsored by SGI. ++ v0.98 ++ 20000614 Richard Gooch <rgooch@atnf.csiro.au> ++ Merged devfs inode into devfs entry. ++ Work sponsored by SGI. ++ v0.99 ++ 20000619 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed dead code in <devfs_register> which used to call ++ <free_dentries>. ++ Work sponsored by SGI. ++ v0.100 ++ 20000621 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed interface to <devfs_register>. ++ Work sponsored by SGI. ++ v0.101 ++ 20000622 Richard Gooch <rgooch@atnf.csiro.au> ++ Simplified interface to <devfs_mk_symlink> and <devfs_mk_dir>. ++ Simplified interface to <devfs_find_handle>. ++ Work sponsored by SGI. ++ v0.102 ++ 20010519 Richard Gooch <rgooch@atnf.csiro.au> ++ Ensure <devfs_generate_path> terminates string for root entry. ++ Exported <devfs_get_name> to modules. ++ 20010520 Richard Gooch <rgooch@atnf.csiro.au> ++ Make <devfs_mk_symlink> send events to devfsd. ++ Cleaned up option processing in <devfs_setup>. ++ 20010521 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bugs in handling symlinks: could leak or cause Oops. ++ 20010522 Richard Gooch <rgooch@atnf.csiro.au> ++ Cleaned up directory handling by separating fops. ++ v0.103 ++ 20010601 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed handling of inverted options in <devfs_setup>. ++ v0.104 ++ 20010604 Richard Gooch <rgooch@atnf.csiro.au> ++ Adjusted <try_modload> to account for <devfs_generate_path> fix. ++ v0.105 ++ 20010617 Richard Gooch <rgooch@atnf.csiro.au> ++ Answered question posed by Al Viro and removed his comments. ++ Moved setting of registered flag after other fields are changed. ++ Fixed race between <devfsd_close> and <devfsd_notify_one>. ++ Global VFS changes added bogus BKL to <devfsd_close>: removed. ++ Widened locking in <devfs_readlink> and <devfs_follow_link>. ++ Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc. ++ Simplified locking in <devfsd_ioctl> and fixed memory leak. ++ v0.106 ++ 20010709 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed broken devnum allocation and use <devfs_alloc_devnum>. ++ Fixed old devnum leak by calling new <devfs_dealloc_devnum>. ++ v0.107 ++ 20010712 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in <devfs_setup> which could hang boot process. ++ v0.108 ++ 20010730 Richard Gooch <rgooch@atnf.csiro.au> ++ Added DEVFSD_NOTIFY_DELETE event. ++ 20010801 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed #include <asm/segment.h>. ++ v0.109 ++ 20010807 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed inode table races by removing it and using ++ inode->u.generic_ip instead. ++ Moved <devfs_read_inode> into <get_vfs_inode>. ++ Moved <devfs_write_inode> into <devfs_notify_change>. ++ v0.110 ++ 20010808 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed race in <devfs_do_symlink> for uni-processor. ++ v0.111 ++ 20010818 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed remnant of multi-mount support in <devfs_mknod>. ++ Removed unused DEVFS_FL_SHOW_UNREG flag. ++ v0.112 ++ 20010820 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed nlink field from struct devfs_inode. ++ v0.113 ++ 20010823 Richard Gooch <rgooch@atnf.csiro.au> ++ Replaced BKL with global rwsem to protect symlink data (quick ++ and dirty hack). ++ v0.114 ++ 20010827 Richard Gooch <rgooch@atnf.csiro.au> ++ Replaced global rwsem for symlink with per-link refcount. ++ v0.115 ++ 20010919 Richard Gooch <rgooch@atnf.csiro.au> ++ Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>. ++ v0.116 ++ 20011008 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed overrun in <devfs_link> by removing function (not needed). ++ 20011009 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed buffer underrun in <try_modload>. ++ 20011029 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed race in <devfsd_ioctl> when setting event mask. ++ 20011114 Richard Gooch <rgooch@atnf.csiro.au> ++ First release of new locking code. ++ v1.0 ++ 20011117 Richard Gooch <rgooch@atnf.csiro.au> ++ Discard temporary buffer, now use "%s" for dentry names. ++ 20011118 Richard Gooch <rgooch@atnf.csiro.au> ++ Don't generate path in <try_modload>: use fake entry instead. ++ Use "existing" directory in <_devfs_make_parent_for_leaf>. ++ 20011122 Richard Gooch <rgooch@atnf.csiro.au> ++ Use slab cache rather than fixed buffer for devfsd events. ++ v1.1 ++ 20011125 Richard Gooch <rgooch@atnf.csiro.au> ++ Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>. ++ 20011127 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed locking bug in <devfs_d_revalidate_wait> due to typo. ++ Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from ++ devfsd or children. ++ v1.2 ++ 20011202 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in <devfsd_read>: was dereferencing freed pointer. ++ v1.3 ++ 20011203 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in <devfsd_close>: was dereferencing freed pointer. ++ Added process group check for devfsd privileges. ++ v1.4 ++ 20011204 Richard Gooch <rgooch@atnf.csiro.au> ++ Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>. ++ v1.5 ++ 20011211 Richard Gooch <rgooch@atnf.csiro.au> ++ Return old entry in <devfs_mk_dir> for 2.4.x kernels. ++ 20011212 Richard Gooch <rgooch@atnf.csiro.au> ++ Increment refcount on module in <check_disc_changed>. ++ 20011215 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_get_handle> and exported <devfs_put>. ++ Increment refcount on module in <devfs_get_ops>. ++ Created <devfs_put_ops>. ++ v1.6 ++ 20011216 Richard Gooch <rgooch@atnf.csiro.au> ++ Added poisoning to <devfs_put>. ++ Improved debugging messages. ++ v1.7 ++ 20011221 Richard Gooch <rgooch@atnf.csiro.au> ++ Corrected (made useful) debugging message in <unregister>. ++ Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs> ++ 20011224 Richard Gooch <rgooch@atnf.csiro.au> ++ Added magic number to guard against scribbling drivers. ++ 20011226 Richard Gooch <rgooch@atnf.csiro.au> ++ Only return old entry in <devfs_mk_dir> if a directory. ++ Defined macros for error and debug messages. ++ v1.8 ++ 20020113 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed (rare, old) race in <devfs_lookup>. ++ v1.9 ++ 20020120 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed deadlock bug in <devfs_d_revalidate_wait>. ++ Tag VFS deletable in <devfs_mk_symlink> if handle ignored. ++ v1.10 ++ 20020129 Richard Gooch <rgooch@atnf.csiro.au> ++ Added KERN_* to remaining messages. ++ Cleaned up declaration of <stat_read>. ++ v1.11 ++ 20020219 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed <devfs_rmdir> to allow later additions if not yet empty. ++ v1.12 ++ 20020406 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed silently introduced calls to lock_kernel() and ++ unlock_kernel() due to recent VFS locking changes. BKL isn't ++ required in devfs. ++ v1.13 ++ 20020428 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed 2.4.x compatibility code. ++ v1.14 ++ 20020510 Richard Gooch <rgooch@atnf.csiro.au> ++ Added BKL to <devfs_open> because drivers still need it. ++ v1.15 ++ 20020512 Richard Gooch <rgooch@atnf.csiro.au> ++ Protected <scan_dir_for_removable> and <get_removable_partition> ++ from changing directory contents. ++ v1.16 ++ 20020514 Richard Gooch <rgooch@atnf.csiro.au> ++ Minor cleanup of <scan_dir_for_removable>. ++ v1.17 ++ 20020721 Richard Gooch <rgooch@atnf.csiro.au> ++ Switched to ISO C structure field initialisers. ++ Switch to set_current_state() and move before add_wait_queue(). ++ 20020722 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed devfs entry leak in <devfs_readdir> when *readdir fails. ++ v1.18 ++ 20020725 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_find_and_unregister>. ++ v1.19 ++ 20020728 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed deprecated <devfs_find_handle>. ++ v1.20 ++ 20020820 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed module unload race in <devfs_open>. ++ v1.21 ++ 20021013 Richard Gooch <rgooch@atnf.csiro.au> ++ Removed DEVFS_ FL_AUTO_OWNER. ++ Switched lingering structure field initialiser to ISO C. ++ Added locking when updating FCB flags. ++ v1.22 ++*/ ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/time.h> ++#include <linux/tty.h> ++#include <linux/timer.h> ++#include <linux/autoconf.h> ++#include <linux/kernel.h> ++#include <linux/wait.h> ++#include <linux/string.h> ++#include <linux/slab.h> ++#include <linux/ioport.h> ++#include <linux/delay.h> ++#include <linux/ctype.h> ++#include <linux/mm.h> ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/devfs_fs.h> ++#include <linux/devfs_fs_kernel.h> ++#include <linux/smp_lock.h> ++#include <linux/smp.h> ++#include <linux/rwsem.h> ++#include <linux/sched.h> ++#include <linux/namei.h> ++#include <linux/bitops.h> ++ ++#include <asm/uaccess.h> ++#include <asm/io.h> ++#include <asm/processor.h> ++#include <asm/system.h> ++#include <asm/pgtable.h> ++#include <asm/atomic.h> ++ ++#define DEVFS_VERSION "2004-01-31" ++ ++#define DEVFS_NAME "devfs" ++ ++#define FIRST_INODE 1 ++ ++#define STRING_LENGTH 256 ++#define FAKE_BLOCK_SIZE 1024 ++#define POISON_PTR ( *(void **) poison_array ) ++#define MAGIC_VALUE 0x327db823 ++ ++#ifndef TRUE ++# define TRUE 1 ++# define FALSE 0 ++#endif ++ ++#define MODE_DIR (S_IFDIR | S_IWUSR | S_IRUGO | S_IXUGO) ++ ++#define DEBUG_NONE 0x0000000 ++#define DEBUG_MODULE_LOAD 0x0000001 ++#define DEBUG_REGISTER 0x0000002 ++#define DEBUG_UNREGISTER 0x0000004 ++#define DEBUG_FREE 0x0000008 ++#define DEBUG_SET_FLAGS 0x0000010 ++#define DEBUG_S_READ 0x0000100 /* Break */ ++#define DEBUG_I_LOOKUP 0x0001000 /* Break */ ++#define DEBUG_I_CREATE 0x0002000 ++#define DEBUG_I_GET 0x0004000 ++#define DEBUG_I_CHANGE 0x0008000 ++#define DEBUG_I_UNLINK 0x0010000 ++#define DEBUG_I_RLINK 0x0020000 ++#define DEBUG_I_FLINK 0x0040000 ++#define DEBUG_I_MKNOD 0x0080000 ++#define DEBUG_F_READDIR 0x0100000 /* Break */ ++#define DEBUG_D_DELETE 0x1000000 /* Break */ ++#define DEBUG_D_RELEASE 0x2000000 ++#define DEBUG_D_IPUT 0x4000000 ++#define DEBUG_ALL 0xfffffff ++#define DEBUG_DISABLED DEBUG_NONE ++ ++#define OPTION_NONE 0x00 ++#define OPTION_MOUNT 0x01 ++ ++#define PRINTK(format, args...) \ ++ {printk (KERN_ERR "%s" format, __FUNCTION__ , ## args);} ++ ++#define OOPS(format, args...) \ ++ {printk (KERN_CRIT "%s" format, __FUNCTION__ , ## args); \ ++ printk ("Forcing Oops\n"); \ ++ BUG();} ++ ++#ifdef CONFIG_DEVFS_DEBUG ++# define VERIFY_ENTRY(de) \ ++ {if ((de) && (de)->magic_number != MAGIC_VALUE) \ ++ OOPS ("(%p): bad magic value: %x\n", (de), (de)->magic_number);} ++# define WRITE_ENTRY_MAGIC(de,magic) (de)->magic_number = (magic) ++# define DPRINTK(flag, format, args...) \ ++ {if (devfs_debug & flag) \ ++ printk (KERN_INFO "%s" format, __FUNCTION__ , ## args);} ++#else ++# define VERIFY_ENTRY(de) ++# define WRITE_ENTRY_MAGIC(de,magic) ++# define DPRINTK(flag, format, args...) ++#endif ++ ++typedef struct devfs_entry *devfs_handle_t; ++ ++struct directory_type { ++ rwlock_t lock; /* Lock for searching(R)/updating(W) */ ++ struct devfs_entry *first; ++ struct devfs_entry *last; ++ unsigned char no_more_additions:1; ++}; ++ ++struct symlink_type { ++ unsigned int length; /* Not including the NULL-termimator */ ++ char *linkname; /* This is NULL-terminated */ ++}; ++ ++struct devfs_inode { /* This structure is for "persistent" inode storage */ ++ struct dentry *dentry; ++ struct timespec atime; ++ struct timespec mtime; ++ struct timespec ctime; ++ unsigned int ino; /* Inode number as seen in the VFS */ ++ uid_t uid; ++ gid_t gid; ++}; ++ ++struct devfs_entry { ++#ifdef CONFIG_DEVFS_DEBUG ++ unsigned int magic_number; ++#endif ++ void *info; ++ atomic_t refcount; /* When this drops to zero, it's unused */ ++ union { ++ struct directory_type dir; ++ dev_t dev; ++ struct symlink_type symlink; ++ const char *name; /* Only used for (mode == 0) */ ++ } u; ++ struct devfs_entry *prev; /* Previous entry in the parent directory */ ++ struct devfs_entry *next; /* Next entry in the parent directory */ ++ struct devfs_entry *parent; /* The parent directory */ ++ struct devfs_inode inode; ++ umode_t mode; ++ unsigned short namelen; /* I think 64k+ filenames are a way off... */ ++ unsigned char vfs:1; /* Whether the VFS may delete the entry */ ++ char name[1]; /* This is just a dummy: the allocated array ++ is bigger. This is NULL-terminated */ ++}; ++ ++/* The root of the device tree */ ++static struct devfs_entry *root_entry; ++ ++struct devfsd_buf_entry { ++ struct devfs_entry *de; /* The name is generated with this */ ++ unsigned short type; /* The type of event */ ++ umode_t mode; ++ uid_t uid; ++ gid_t gid; ++ struct devfsd_buf_entry *next; ++}; ++ ++struct fs_info { /* This structure is for the mounted devfs */ ++ struct super_block *sb; ++ spinlock_t devfsd_buffer_lock; /* Lock when inserting/deleting events */ ++ struct devfsd_buf_entry *devfsd_first_event; ++ struct devfsd_buf_entry *devfsd_last_event; ++ volatile int devfsd_sleeping; ++ volatile struct task_struct *devfsd_task; ++ volatile pid_t devfsd_pgrp; ++ volatile struct file *devfsd_file; ++ struct devfsd_notify_struct *devfsd_info; ++ volatile unsigned long devfsd_event_mask; ++ atomic_t devfsd_overrun_count; ++ wait_queue_head_t devfsd_wait_queue; /* Wake devfsd on input */ ++ wait_queue_head_t revalidate_wait_queue; /* Wake when devfsd sleeps */ ++}; ++ ++static struct fs_info fs_info = {.devfsd_buffer_lock = SPIN_LOCK_UNLOCKED }; ++static kmem_cache_t *devfsd_buf_cache; ++#ifdef CONFIG_DEVFS_DEBUG ++static unsigned int devfs_debug_init __initdata = DEBUG_NONE; ++static unsigned int devfs_debug = DEBUG_NONE; ++static DEFINE_SPINLOCK(stat_lock); ++static unsigned int stat_num_entries; ++static unsigned int stat_num_bytes; ++#endif ++static unsigned char poison_array[8] = ++ { 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a }; ++ ++#ifdef CONFIG_DEVFS_MOUNT ++static unsigned int boot_options = OPTION_MOUNT; ++#else ++static unsigned int boot_options = OPTION_NONE; ++#endif ++ ++/* Forward function declarations */ ++static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir, ++ const char *name, int namelen, ++ int traverse_symlink); ++static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len, ++ loff_t * ppos); ++static int devfsd_ioctl(struct inode *inode, struct file *file, ++ unsigned int cmd, unsigned long arg); ++static int devfsd_close(struct inode *inode, struct file *file); ++#ifdef CONFIG_DEVFS_DEBUG ++static ssize_t stat_read(struct file *file, char __user *buf, size_t len, ++ loff_t * ppos); ++static const struct file_operations stat_fops = { ++ .open = nonseekable_open, ++ .read = stat_read, ++}; ++#endif ++ ++/* Devfs daemon file operations */ ++static const struct file_operations devfsd_fops = { ++ .open = nonseekable_open, ++ .read = devfsd_read, ++ .ioctl = devfsd_ioctl, ++ .release = devfsd_close, ++}; ++ ++/* Support functions follow */ ++ ++/** ++ * devfs_get - Get a reference to a devfs entry. ++ * @de: The devfs entry. ++ */ ++ ++static struct devfs_entry *devfs_get(struct devfs_entry *de) ++{ ++ VERIFY_ENTRY(de); ++ if (de) ++ atomic_inc(&de->refcount); ++ return de; ++} /* End Function devfs_get */ ++ ++/** ++ * devfs_put - Put (release) a reference to a devfs entry. ++ * @de: The handle to the devfs entry. ++ */ ++ ++static void devfs_put(devfs_handle_t de) ++{ ++ if (!de) ++ return; ++ VERIFY_ENTRY(de); ++ if (de->info == POISON_PTR) ++ OOPS("(%p): poisoned pointer\n", de); ++ if (!atomic_dec_and_test(&de->refcount)) ++ return; ++ if (de == root_entry) ++ OOPS("(%p): root entry being freed\n", de); ++ DPRINTK(DEBUG_FREE, "(%s): de: %p, parent: %p \"%s\"\n", ++ de->name, de, de->parent, ++ de->parent ? de->parent->name : "no parent"); ++ if (S_ISLNK(de->mode)) ++ kfree(de->u.symlink.linkname); ++ WRITE_ENTRY_MAGIC(de, 0); ++#ifdef CONFIG_DEVFS_DEBUG ++ spin_lock(&stat_lock); ++ --stat_num_entries; ++ stat_num_bytes -= sizeof *de + de->namelen; ++ if (S_ISLNK(de->mode)) ++ stat_num_bytes -= de->u.symlink.length + 1; ++ spin_unlock(&stat_lock); ++#endif ++ de->info = POISON_PTR; ++ kfree(de); ++} /* End Function devfs_put */ ++ ++/** ++ * _devfs_search_dir - Search for a devfs entry in a directory. ++ * @dir: The directory to search. ++ * @name: The name of the entry to search for. ++ * @namelen: The number of characters in @name. ++ * ++ * Search for a devfs entry in a directory and returns a pointer to the entry ++ * on success, else %NULL. The directory must be locked already. ++ * An implicit devfs_get() is performed on the returned entry. ++ */ ++ ++static struct devfs_entry *_devfs_search_dir(struct devfs_entry *dir, ++ const char *name, ++ unsigned int namelen) ++{ ++ struct devfs_entry *curr; ++ ++ if (!S_ISDIR(dir->mode)) { ++ PRINTK("(%s): not a directory\n", dir->name); ++ return NULL; ++ } ++ for (curr = dir->u.dir.first; curr != NULL; curr = curr->next) { ++ if (curr->namelen != namelen) ++ continue; ++ if (memcmp(curr->name, name, namelen) == 0) ++ break; ++ /* Not found: try the next one */ ++ } ++ return devfs_get(curr); ++} /* End Function _devfs_search_dir */ ++ ++/** ++ * _devfs_alloc_entry - Allocate a devfs entry. ++ * @name: the name of the entry ++ * @namelen: the number of characters in @name ++ * @mode: the mode for the entry ++ * ++ * Allocate a devfs entry and returns a pointer to the entry on success, else ++ * %NULL. ++ */ ++ ++static struct devfs_entry *_devfs_alloc_entry(const char *name, ++ unsigned int namelen, ++ umode_t mode) ++{ ++ struct devfs_entry *new; ++ static unsigned long inode_counter = FIRST_INODE; ++ static DEFINE_SPINLOCK(counter_lock); ++ ++ if (name && (namelen < 1)) ++ namelen = strlen(name); ++ if ((new = kmalloc(sizeof *new + namelen, GFP_KERNEL)) == NULL) ++ return NULL; ++ memset(new, 0, sizeof *new + namelen); /* Will set '\0' on name */ ++ new->mode = mode; ++ if (S_ISDIR(mode)) ++ rwlock_init(&new->u.dir.lock); ++ atomic_set(&new->refcount, 1); ++ spin_lock(&counter_lock); ++ new->inode.ino = inode_counter++; ++ spin_unlock(&counter_lock); ++ if (name) ++ memcpy(new->name, name, namelen); ++ new->namelen = namelen; ++ WRITE_ENTRY_MAGIC(new, MAGIC_VALUE); ++#ifdef CONFIG_DEVFS_DEBUG ++ spin_lock(&stat_lock); ++ ++stat_num_entries; ++ stat_num_bytes += sizeof *new + namelen; ++ spin_unlock(&stat_lock); ++#endif ++ return new; ++} /* End Function _devfs_alloc_entry */ ++ ++/** ++ * _devfs_append_entry - Append a devfs entry to a directory's child list. ++ * @dir: The directory to add to. ++ * @de: The devfs entry to append. ++ * @old_de: If an existing entry exists, it will be written here. This may ++ * be %NULL. An implicit devfs_get() is performed on this entry. ++ * ++ * Append a devfs entry to a directory's list of children, checking first to ++ * see if an entry of the same name exists. The directory will be locked. ++ * The value 0 is returned on success, else a negative error code. ++ * On failure, an implicit devfs_put() is performed on %de. ++ */ ++ ++static int _devfs_append_entry(devfs_handle_t dir, devfs_handle_t de, ++ devfs_handle_t * old_de) ++{ ++ int retval; ++ ++ if (old_de) ++ *old_de = NULL; ++ if (!S_ISDIR(dir->mode)) { ++ PRINTK("(%s): dir: \"%s\" is not a directory\n", de->name, ++ dir->name); ++ devfs_put(de); ++ return -ENOTDIR; ++ } ++ write_lock(&dir->u.dir.lock); ++ if (dir->u.dir.no_more_additions) ++ retval = -ENOENT; ++ else { ++ struct devfs_entry *old; ++ ++ old = _devfs_search_dir(dir, de->name, de->namelen); ++ if (old_de) ++ *old_de = old; ++ else ++ devfs_put(old); ++ if (old == NULL) { ++ de->parent = dir; ++ de->prev = dir->u.dir.last; ++ /* Append to the directory's list of children */ ++ if (dir->u.dir.first == NULL) ++ dir->u.dir.first = de; ++ else ++ dir->u.dir.last->next = de; ++ dir->u.dir.last = de; ++ retval = 0; ++ } else ++ retval = -EEXIST; ++ } ++ write_unlock(&dir->u.dir.lock); ++ if (retval) ++ devfs_put(de); ++ return retval; ++} /* End Function _devfs_append_entry */ ++ ++/** ++ * _devfs_get_root_entry - Get the root devfs entry. ++ * ++ * Returns the root devfs entry on success, else %NULL. ++ * ++ * TODO it must be called asynchronously due to the fact ++ * that devfs is initialized relatively late. Proper way ++ * is to remove module_init from init_devfs_fs and manually ++ * call it early enough during system init ++ */ ++ ++static struct devfs_entry *_devfs_get_root_entry(void) ++{ ++ struct devfs_entry *new; ++ static DEFINE_SPINLOCK(root_lock); ++ ++ if (root_entry) ++ return root_entry; ++ ++ new = _devfs_alloc_entry(NULL, 0, MODE_DIR); ++ if (new == NULL) ++ return NULL; ++ ++ spin_lock(&root_lock); ++ if (root_entry) { ++ spin_unlock(&root_lock); ++ devfs_put(new); ++ return root_entry; ++ } ++ root_entry = new; ++ spin_unlock(&root_lock); ++ ++ return root_entry; ++} /* End Function _devfs_get_root_entry */ ++ ++/** ++ * _devfs_descend - Descend down a tree using the next component name. ++ * @dir: The directory to search. ++ * @name: The component name to search for. ++ * @namelen: The length of %name. ++ * @next_pos: The position of the next '/' or '\0' is written here. ++ * ++ * Descend into a directory, searching for a component. This function forms ++ * the core of a tree-walking algorithm. The directory will be locked. ++ * The devfs entry corresponding to the component is returned. If there is ++ * no matching entry, %NULL is returned. ++ * An implicit devfs_get() is performed on the returned entry. ++ */ ++ ++static struct devfs_entry *_devfs_descend(struct devfs_entry *dir, ++ const char *name, int namelen, ++ int *next_pos) ++{ ++ const char *stop, *ptr; ++ struct devfs_entry *entry; ++ ++ if ((namelen >= 3) && (strncmp(name, "../", 3) == 0)) { /* Special-case going to parent directory */ ++ *next_pos = 3; ++ return devfs_get(dir->parent); ++ } ++ stop = name + namelen; ++ /* Search for a possible '/' */ ++ for (ptr = name; (ptr < stop) && (*ptr != '/'); ++ptr) ; ++ *next_pos = ptr - name; ++ read_lock(&dir->u.dir.lock); ++ entry = _devfs_search_dir(dir, name, *next_pos); ++ read_unlock(&dir->u.dir.lock); ++ return entry; ++} /* End Function _devfs_descend */ ++ ++static devfs_handle_t _devfs_make_parent_for_leaf(struct devfs_entry *dir, ++ const char *name, ++ int namelen, int *leaf_pos) ++{ ++ int next_pos = 0; ++ ++ if (dir == NULL) ++ dir = _devfs_get_root_entry(); ++ if (dir == NULL) ++ return NULL; ++ devfs_get(dir); ++ /* Search for possible trailing component and ignore it */ ++ for (--namelen; (namelen > 0) && (name[namelen] != '/'); --namelen) ; ++ *leaf_pos = (name[namelen] == '/') ? (namelen + 1) : 0; ++ for (; namelen > 0; name += next_pos, namelen -= next_pos) { ++ struct devfs_entry *de, *old = NULL; ++ ++ if ((de = ++ _devfs_descend(dir, name, namelen, &next_pos)) == NULL) { ++ de = _devfs_alloc_entry(name, next_pos, MODE_DIR); ++ devfs_get(de); ++ if (!de || _devfs_append_entry(dir, de, &old)) { ++ devfs_put(de); ++ if (!old || !S_ISDIR(old->mode)) { ++ devfs_put(old); ++ devfs_put(dir); ++ return NULL; ++ } ++ de = old; /* Use the existing directory */ ++ } ++ } ++ if (de == dir->parent) { ++ devfs_put(dir); ++ devfs_put(de); ++ return NULL; ++ } ++ devfs_put(dir); ++ dir = de; ++ if (name[next_pos] == '/') ++ ++next_pos; ++ } ++ return dir; ++} /* End Function _devfs_make_parent_for_leaf */ ++ ++static devfs_handle_t _devfs_prepare_leaf(devfs_handle_t * dir, ++ const char *name, umode_t mode) ++{ ++ int namelen, leaf_pos; ++ struct devfs_entry *de; ++ ++ namelen = strlen(name); ++ if ((*dir = _devfs_make_parent_for_leaf(*dir, name, namelen, ++ &leaf_pos)) == NULL) { ++ PRINTK("(%s): could not create parent path\n", name); ++ return NULL; ++ } ++ if ((de = _devfs_alloc_entry(name + leaf_pos, namelen - leaf_pos, mode)) ++ == NULL) { ++ PRINTK("(%s): could not allocate entry\n", name); ++ devfs_put(*dir); ++ return NULL; ++ } ++ return de; ++} /* End Function _devfs_prepare_leaf */ ++ ++static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir, ++ const char *name, int namelen, ++ int traverse_symlink) ++{ ++ int next_pos = 0; ++ ++ if (dir == NULL) ++ dir = _devfs_get_root_entry(); ++ if (dir == NULL) ++ return NULL; ++ devfs_get(dir); ++ for (; namelen > 0; name += next_pos, namelen -= next_pos) { ++ struct devfs_entry *de, *link; ++ ++ if (!S_ISDIR(dir->mode)) { ++ devfs_put(dir); ++ return NULL; ++ } ++ ++ if ((de = ++ _devfs_descend(dir, name, namelen, &next_pos)) == NULL) { ++ devfs_put(dir); ++ return NULL; ++ } ++ if (S_ISLNK(de->mode) && traverse_symlink) { /* Need to follow the link: this is a stack chomper */ ++ /* FIXME what if it puts outside of mounted tree? */ ++ link = _devfs_walk_path(dir, de->u.symlink.linkname, ++ de->u.symlink.length, TRUE); ++ devfs_put(de); ++ if (!link) { ++ devfs_put(dir); ++ return NULL; ++ } ++ de = link; ++ } ++ devfs_put(dir); ++ dir = de; ++ if (name[next_pos] == '/') ++ ++next_pos; ++ } ++ return dir; ++} /* End Function _devfs_walk_path */ ++ ++/** ++ * _devfs_find_entry - Find a devfs entry. ++ * @dir: The handle to the parent devfs directory entry. If this is %NULL the ++ * name is relative to the root of the devfs. ++ * @name: The name of the entry. This may be %NULL. ++ * @traverse_symlink: If %TRUE then symbolic links are traversed. ++ * ++ * Returns the devfs_entry pointer on success, else %NULL. An implicit ++ * devfs_get() is performed. ++ */ ++ ++static struct devfs_entry *_devfs_find_entry(devfs_handle_t dir, ++ const char *name, ++ int traverse_symlink) ++{ ++ unsigned int namelen = strlen(name); ++ ++ if (name[0] == '/') { ++ /* Skip leading pathname component */ ++ if (namelen < 2) { ++ PRINTK("(%s): too short\n", name); ++ return NULL; ++ } ++ for (++name, --namelen; (*name != '/') && (namelen > 0); ++ ++name, --namelen) ; ++ if (namelen < 2) { ++ PRINTK("(%s): too short\n", name); ++ return NULL; ++ } ++ ++name; ++ --namelen; ++ } ++ return _devfs_walk_path(dir, name, namelen, traverse_symlink); ++} /* End Function _devfs_find_entry */ ++ ++static struct devfs_entry *get_devfs_entry_from_vfs_inode(struct inode *inode) ++{ ++ if (inode == NULL) ++ return NULL; ++ VERIFY_ENTRY((struct devfs_entry *)inode->u.generic_ip); ++ return inode->i_private; ++} /* End Function get_devfs_entry_from_vfs_inode */ ++ ++/** ++ * free_dentry - Free the dentry for a device entry and invalidate inode. ++ * @de: The entry. ++ * ++ * This must only be called after the entry has been unhooked from its ++ * parent directory. ++ */ ++ ++static void free_dentry(struct devfs_entry *de) ++{ ++ struct dentry *dentry = de->inode.dentry; ++ ++ if (!dentry) ++ return; ++ spin_lock(&dcache_lock); ++ dget_locked(dentry); ++ spin_unlock(&dcache_lock); ++ /* Forcefully remove the inode */ ++ if (dentry->d_inode != NULL) ++ dentry->d_inode->i_nlink = 0; ++ d_drop(dentry); ++ dput(dentry); ++} /* End Function free_dentry */ ++ ++/** ++ * is_devfsd_or_child - Test if the current process is devfsd or one of its children. ++ * @fs_info: The filesystem information. ++ * ++ * Returns %TRUE if devfsd or child, else %FALSE. ++ */ ++ ++static int is_devfsd_or_child(struct fs_info *fs_info) ++{ ++ struct task_struct *p = current; ++ ++ if (p == fs_info->devfsd_task) ++ return (TRUE); ++ if (process_group(p) == fs_info->devfsd_pgrp) ++ return (TRUE); ++ read_lock(&tasklist_lock); ++ for (; p != &init_task; p = p->real_parent) { ++ if (p == fs_info->devfsd_task) { ++ read_unlock(&tasklist_lock); ++ return (TRUE); ++ } ++ } ++ read_unlock(&tasklist_lock); ++ return (FALSE); ++} /* End Function is_devfsd_or_child */ ++ ++/** ++ * devfsd_queue_empty - Test if devfsd has work pending in its event queue. ++ * @fs_info: The filesystem information. ++ * ++ * Returns %TRUE if the queue is empty, else %FALSE. ++ */ ++ ++static inline int devfsd_queue_empty(struct fs_info *fs_info) ++{ ++ return (fs_info->devfsd_last_event) ? FALSE : TRUE; ++} /* End Function devfsd_queue_empty */ ++ ++/** ++ * wait_for_devfsd_finished - Wait for devfsd to finish processing its event queue. ++ * @fs_info: The filesystem information. ++ * ++ * Returns %TRUE if no more waiting will be required, else %FALSE. ++ */ ++ ++static int wait_for_devfsd_finished(struct fs_info *fs_info) ++{ ++ DECLARE_WAITQUEUE(wait, current); ++ ++ if (fs_info->devfsd_task == NULL) ++ return (TRUE); ++ if (devfsd_queue_empty(fs_info) && fs_info->devfsd_sleeping) ++ return TRUE; ++ if (is_devfsd_or_child(fs_info)) ++ return (FALSE); ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ add_wait_queue(&fs_info->revalidate_wait_queue, &wait); ++ if (!devfsd_queue_empty(fs_info) || !fs_info->devfsd_sleeping) ++ if (fs_info->devfsd_task) ++ schedule(); ++ remove_wait_queue(&fs_info->revalidate_wait_queue, &wait); ++ __set_current_state(TASK_RUNNING); ++ return (TRUE); ++} /* End Function wait_for_devfsd_finished */ ++ ++/** ++ * devfsd_notify_de - Notify the devfsd daemon of a change. ++ * @de: The devfs entry that has changed. This and all parent entries will ++ * have their reference counts incremented if the event was queued. ++ * @type: The type of change. ++ * @mode: The mode of the entry. ++ * @uid: The user ID. ++ * @gid: The group ID. ++ * @fs_info: The filesystem info. ++ * ++ * Returns %TRUE if an event was queued and devfsd woken up, else %FALSE. ++ */ ++ ++static int devfsd_notify_de(struct devfs_entry *de, ++ unsigned short type, umode_t mode, ++ uid_t uid, gid_t gid, struct fs_info *fs_info) ++{ ++ struct devfsd_buf_entry *entry; ++ struct devfs_entry *curr; ++ ++ if (!(fs_info->devfsd_event_mask & (1 << type))) ++ return (FALSE); ++ if ((entry = kmem_cache_alloc(devfsd_buf_cache, SLAB_KERNEL)) == NULL) { ++ atomic_inc(&fs_info->devfsd_overrun_count); ++ return (FALSE); ++ } ++ for (curr = de; curr != NULL; curr = curr->parent) ++ devfs_get(curr); ++ entry->de = de; ++ entry->type = type; ++ entry->mode = mode; ++ entry->uid = uid; ++ entry->gid = gid; ++ entry->next = NULL; ++ spin_lock(&fs_info->devfsd_buffer_lock); ++ if (!fs_info->devfsd_first_event) ++ fs_info->devfsd_first_event = entry; ++ if (fs_info->devfsd_last_event) ++ fs_info->devfsd_last_event->next = entry; ++ fs_info->devfsd_last_event = entry; ++ spin_unlock(&fs_info->devfsd_buffer_lock); ++ wake_up_interruptible(&fs_info->devfsd_wait_queue); ++ return (TRUE); ++} /* End Function devfsd_notify_de */ ++ ++/** ++ * devfsd_notify - Notify the devfsd daemon of a change. ++ * @de: The devfs entry that has changed. ++ * @type: The type of change event. ++ * @wait: If TRUE, the function waits for the daemon to finish processing ++ * the event. ++ */ ++ ++static void devfsd_notify(struct devfs_entry *de, unsigned short type) ++{ ++ devfsd_notify_de(de, type, de->mode, current->euid, ++ current->egid, &fs_info); ++} ++ ++static int devfs_mk_dev(dev_t dev, umode_t mode, const char *fmt, va_list args) ++{ ++ struct devfs_entry *dir = NULL, *de; ++ char buf[64]; ++ int error, n; ++ ++ n = vsnprintf(buf, sizeof(buf), fmt, args); ++ if (n >= sizeof(buf) || !buf[0]) { ++ printk(KERN_WARNING "%s: invalid format string %s\n", ++ __FUNCTION__, fmt); ++ return -EINVAL; ++ } ++ ++ de = _devfs_prepare_leaf(&dir, buf, mode); ++ if (!de) { ++ printk(KERN_WARNING "%s: could not prepare leaf for %s\n", ++ __FUNCTION__, buf); ++ return -ENOMEM; /* could be more accurate... */ ++ } ++ ++ de->u.dev = dev; ++ ++ error = _devfs_append_entry(dir, de, NULL); ++ if (error) { ++ printk(KERN_WARNING "%s: could not append to parent for %s\n", ++ __FUNCTION__, buf); ++ goto out; ++ } ++ ++ devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED); ++ out: ++ devfs_put(dir); ++ return error; ++} ++ ++int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...) ++{ ++ va_list args; ++ ++ if (!S_ISBLK(mode)) { ++ printk(KERN_WARNING "%s: invalide mode (%u) for %s\n", ++ __FUNCTION__, mode, fmt); ++ return -EINVAL; ++ } ++ ++ va_start(args, fmt); ++ return devfs_mk_dev(dev, mode, fmt, args); ++} ++ ++EXPORT_SYMBOL(devfs_mk_bdev); ++ ++int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...) ++{ ++ va_list args; ++ ++ if (!S_ISCHR(mode)) { ++ printk(KERN_WARNING "%s: invalide mode (%u) for %s\n", ++ __FUNCTION__, mode, fmt); ++ return -EINVAL; ++ } ++ ++ va_start(args, fmt); ++ return devfs_mk_dev(dev, mode, fmt, args); ++} ++ ++EXPORT_SYMBOL(devfs_mk_cdev); ++ ++/** ++ * _devfs_unhook - Unhook a device entry from its parents list ++ * @de: The entry to unhook. ++ * ++ * Returns %TRUE if the entry was unhooked, else %FALSE if it was ++ * previously unhooked. ++ * The caller must have a write lock on the parent directory. ++ */ ++ ++static int _devfs_unhook(struct devfs_entry *de) ++{ ++ struct devfs_entry *parent; ++ ++ if (!de || (de->prev == de)) ++ return FALSE; ++ parent = de->parent; ++ if (de->prev == NULL) ++ parent->u.dir.first = de->next; ++ else ++ de->prev->next = de->next; ++ if (de->next == NULL) ++ parent->u.dir.last = de->prev; ++ else ++ de->next->prev = de->prev; ++ de->prev = de; /* Indicate we're unhooked */ ++ de->next = NULL; /* Force early termination for <devfs_readdir> */ ++ return TRUE; ++} /* End Function _devfs_unhook */ ++ ++/** ++ * _devfs_unregister - Unregister a device entry from its parent. ++ * @dir: The parent directory. ++ * @de: The entry to unregister. ++ * ++ * The caller must have a write lock on the parent directory, which is ++ * unlocked by this function. ++ */ ++ ++static void _devfs_unregister(struct devfs_entry *dir, struct devfs_entry *de) ++{ ++ int unhooked = _devfs_unhook(de); ++ ++ write_unlock(&dir->u.dir.lock); ++ if (!unhooked) ++ return; ++ devfs_get(dir); ++ devfsd_notify(de, DEVFSD_NOTIFY_UNREGISTERED); ++ free_dentry(de); ++ devfs_put(dir); ++ if (!S_ISDIR(de->mode)) ++ return; ++ while (TRUE) { /* Recursively unregister: this is a stack chomper */ ++ struct devfs_entry *child; ++ ++ write_lock(&de->u.dir.lock); ++ de->u.dir.no_more_additions = TRUE; ++ child = de->u.dir.first; ++ VERIFY_ENTRY(child); ++ _devfs_unregister(de, child); ++ if (!child) ++ break; ++ DPRINTK(DEBUG_UNREGISTER, "(%s): child: %p refcount: %d\n", ++ child->name, child, atomic_read(&child->refcount)); ++ devfs_put(child); ++ } ++} /* End Function _devfs_unregister */ ++ ++static int devfs_do_symlink(devfs_handle_t dir, const char *name, ++ const char *link, devfs_handle_t * handle) ++{ ++ int err; ++ unsigned int linklength; ++ char *newlink; ++ struct devfs_entry *de; ++ ++ if (handle != NULL) ++ *handle = NULL; ++ if (name == NULL) { ++ PRINTK("(): NULL name pointer\n"); ++ return -EINVAL; ++ } ++ if (link == NULL) { ++ PRINTK("(%s): NULL link pointer\n", name); ++ return -EINVAL; ++ } ++ linklength = strlen(link); ++ if ((newlink = kmalloc(linklength + 1, GFP_KERNEL)) == NULL) ++ return -ENOMEM; ++ memcpy(newlink, link, linklength); ++ newlink[linklength] = '\0'; ++ if ((de = _devfs_prepare_leaf(&dir, name, S_IFLNK | S_IRUGO | S_IXUGO)) ++ == NULL) { ++ PRINTK("(%s): could not prepare leaf\n", name); ++ kfree(newlink); ++ return -ENOTDIR; ++ } ++ de->info = NULL; ++ de->u.symlink.linkname = newlink; ++ de->u.symlink.length = linklength; ++ if ((err = _devfs_append_entry(dir, de, NULL)) != 0) { ++ PRINTK("(%s): could not append to parent, err: %d\n", name, ++ err); ++ devfs_put(dir); ++ return err; ++ } ++ devfs_put(dir); ++#ifdef CONFIG_DEVFS_DEBUG ++ spin_lock(&stat_lock); ++ stat_num_bytes += linklength + 1; ++ spin_unlock(&stat_lock); ++#endif ++ if (handle != NULL) ++ *handle = de; ++ return 0; ++} /* End Function devfs_do_symlink */ ++ ++/** ++ * devfs_mk_symlink Create a symbolic link in the devfs namespace. ++ * @from: The name of the entry. ++ * @to: Name of the destination ++ * ++ * Returns 0 on success, else a negative error code is returned. ++ */ ++ ++int devfs_mk_symlink(const char *from, const char *to) ++{ ++ devfs_handle_t de; ++ int err; ++ ++ err = devfs_do_symlink(NULL, from, to, &de); ++ if (!err) { ++ de->vfs = TRUE; ++ devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED); ++ } ++ ++ return err; ++} ++ ++/** ++ * devfs_mk_dir - Create a directory in the devfs namespace. ++ * new name is relative to the root of the devfs. ++ * @fmt: The name of the entry. ++ * ++ * Use of this function is optional. The devfs_register() function ++ * will automatically create intermediate directories as needed. This function ++ * is provided for efficiency reasons, as it provides a handle to a directory. ++ * On failure %NULL is returned. ++ */ ++ ++int devfs_mk_dir(const char *fmt, ...) ++{ ++ struct devfs_entry *dir = NULL, *de = NULL, *old; ++ char buf[64]; ++ va_list args; ++ int error, n; ++ ++ va_start(args, fmt); ++ n = vsnprintf(buf, 64, fmt, args); ++ if (n >= 64 || !buf[0]) { ++ printk(KERN_WARNING "%s: invalid argument.", __FUNCTION__); ++ return -EINVAL; ++ } ++ ++ de = _devfs_prepare_leaf(&dir, buf, MODE_DIR); ++ if (!de) { ++ PRINTK("(%s): could not prepare leaf\n", buf); ++ return -EINVAL; ++ } ++ ++ error = _devfs_append_entry(dir, de, &old); ++ if (error == -EEXIST && S_ISDIR(old->mode)) { ++ /* ++ * devfs_mk_dir() of an already-existing directory will ++ * return success. ++ */ ++ error = 0; ++ goto out_put; ++ } else if (error) { ++ PRINTK("(%s): could not append to dir: %p \"%s\"\n", ++ buf, dir, dir->name); ++ devfs_put(old); ++ goto out_put; ++ } ++ ++ devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED); ++ ++ out_put: ++ devfs_put(dir); ++ return error; ++} ++ ++void devfs_remove(const char *fmt, ...) ++{ ++ char buf[64]; ++ va_list args; ++ int n; ++ ++ va_start(args, fmt); ++ n = vsnprintf(buf, sizeof(buf), fmt, args); ++ if (n < sizeof(buf) && buf[0]) { ++ devfs_handle_t de = _devfs_find_entry(NULL, buf, 0); ++ ++ if (!de) { ++ printk(KERN_ERR "%s: %s not found, cannot remove\n", ++ __FUNCTION__, buf); ++ dump_stack(); ++ return; ++ } ++ ++ write_lock(&de->parent->u.dir.lock); ++ _devfs_unregister(de->parent, de); ++ devfs_put(de); ++ devfs_put(de); ++ } ++} ++ ++/** ++ * devfs_generate_path - Generate a pathname for an entry, relative to the devfs root. ++ * @de: The devfs entry. ++ * @path: The buffer to write the pathname to. The pathname and '\0' ++ * terminator will be written at the end of the buffer. ++ * @buflen: The length of the buffer. ++ * ++ * Returns the offset in the buffer where the pathname starts on success, ++ * else a negative error code. ++ */ ++ ++static int devfs_generate_path(devfs_handle_t de, char *path, int buflen) ++{ ++ int pos; ++#define NAMEOF(de) ( (de)->mode ? (de)->name : (de)->u.name ) ++ ++ if (de == NULL) ++ return -EINVAL; ++ VERIFY_ENTRY(de); ++ if (de->namelen >= buflen) ++ return -ENAMETOOLONG; /* Must be first */ ++ path[buflen - 1] = '\0'; ++ if (de->parent == NULL) ++ return buflen - 1; /* Don't prepend root */ ++ pos = buflen - de->namelen - 1; ++ memcpy(path + pos, NAMEOF(de), de->namelen); ++ for (de = de->parent; de->parent != NULL; de = de->parent) { ++ if (pos - de->namelen - 1 < 0) ++ return -ENAMETOOLONG; ++ path[--pos] = '/'; ++ pos -= de->namelen; ++ memcpy(path + pos, NAMEOF(de), de->namelen); ++ } ++ return pos; ++} /* End Function devfs_generate_path */ ++ ++/** ++ * devfs_setup - Process kernel boot options. ++ * @str: The boot options after the "devfs=". ++ */ ++ ++static int __init devfs_setup(char *str) ++{ ++ static struct { ++ char *name; ++ unsigned int mask; ++ unsigned int *opt; ++ } devfs_options_tab[] __initdata = { ++#ifdef CONFIG_DEVFS_DEBUG ++ { ++ "dall", DEBUG_ALL, &devfs_debug_init}, { ++ "dmod", DEBUG_MODULE_LOAD, &devfs_debug_init}, { ++ "dreg", DEBUG_REGISTER, &devfs_debug_init}, { ++ "dunreg", DEBUG_UNREGISTER, &devfs_debug_init}, { ++ "dfree", DEBUG_FREE, &devfs_debug_init}, { ++ "diget", DEBUG_I_GET, &devfs_debug_init}, { ++ "dchange", DEBUG_SET_FLAGS, &devfs_debug_init}, { ++ "dsread", DEBUG_S_READ, &devfs_debug_init}, { ++ "dichange", DEBUG_I_CHANGE, &devfs_debug_init}, { ++ "dimknod", DEBUG_I_MKNOD, &devfs_debug_init}, { ++ "dilookup", DEBUG_I_LOOKUP, &devfs_debug_init}, { ++ "diunlink", DEBUG_I_UNLINK, &devfs_debug_init}, ++#endif /* CONFIG_DEVFS_DEBUG */ ++ { ++ "mount", OPTION_MOUNT, &boot_options}, { ++ NULL, 0, NULL} ++ }; ++ ++ while ((*str != '\0') && !isspace(*str)) { ++ int i, found = 0, invert = 0; ++ ++ if (strncmp(str, "no", 2) == 0) { ++ invert = 1; ++ str += 2; ++ } ++ for (i = 0; devfs_options_tab[i].name != NULL; i++) { ++ int len = strlen(devfs_options_tab[i].name); ++ ++ if (strncmp(str, devfs_options_tab[i].name, len) == 0) { ++ if (invert) ++ *devfs_options_tab[i].opt &= ++ ~devfs_options_tab[i].mask; ++ else ++ *devfs_options_tab[i].opt |= ++ devfs_options_tab[i].mask; ++ str += len; ++ found = 1; ++ break; ++ } ++ } ++ if (!found) ++ return 0; /* No match */ ++ if (*str != ',') ++ return 0; /* No more options */ ++ ++str; ++ } ++ return 1; ++} /* End Function devfs_setup */ ++ ++__setup("devfs=", devfs_setup); ++ ++EXPORT_SYMBOL(devfs_mk_dir); ++EXPORT_SYMBOL(devfs_remove); ++ ++/** ++ * try_modload - Notify devfsd of an inode lookup by a non-devfsd process. ++ * @parent: The parent devfs entry. ++ * @fs_info: The filesystem info. ++ * @name: The device name. ++ * @namelen: The number of characters in @name. ++ * @buf: A working area that will be used. This must not go out of scope ++ * until devfsd is idle again. ++ * ++ * Returns 0 on success (event was queued), else a negative error code. ++ */ ++ ++static int try_modload(struct devfs_entry *parent, struct fs_info *fs_info, ++ const char *name, unsigned namelen, ++ struct devfs_entry *buf) ++{ ++ if (!(fs_info->devfsd_event_mask & (1 << DEVFSD_NOTIFY_LOOKUP))) ++ return -ENOENT; ++ if (is_devfsd_or_child(fs_info)) ++ return -ENOENT; ++ memset(buf, 0, sizeof *buf); ++ atomic_set(&buf->refcount, 1); ++ buf->parent = parent; ++ buf->namelen = namelen; ++ buf->u.name = name; ++ WRITE_ENTRY_MAGIC(buf, MAGIC_VALUE); ++ if (!devfsd_notify_de(buf, DEVFSD_NOTIFY_LOOKUP, 0, ++ current->euid, current->egid, fs_info)) ++ return -ENOENT; ++ /* Possible success: event has been queued */ ++ return 0; ++} /* End Function try_modload */ ++ ++/* Superblock operations follow */ ++ ++static struct inode_operations devfs_iops; ++static struct inode_operations devfs_dir_iops; ++static const struct file_operations devfs_fops; ++static const struct file_operations devfs_dir_fops; ++static struct inode_operations devfs_symlink_iops; ++ ++static int devfs_notify_change(struct dentry *dentry, struct iattr *iattr) ++{ ++ int retval; ++ struct devfs_entry *de; ++ struct inode *inode = dentry->d_inode; ++ struct fs_info *fs_info = inode->i_sb->s_fs_info; ++ ++ de = get_devfs_entry_from_vfs_inode(inode); ++ if (de == NULL) ++ return -ENODEV; ++ retval = inode_change_ok(inode, iattr); ++ if (retval != 0) ++ return retval; ++ retval = inode_setattr(inode, iattr); ++ if (retval != 0) ++ return retval; ++ DPRINTK(DEBUG_I_CHANGE, "(%d): VFS inode: %p devfs_entry: %p\n", ++ (int)inode->i_ino, inode, de); ++ DPRINTK(DEBUG_I_CHANGE, "(): mode: 0%o uid: %d gid: %d\n", ++ (int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid); ++ /* Inode is not on hash chains, thus must save permissions here rather ++ than in a write_inode() method */ ++ de->mode = inode->i_mode; ++ de->inode.uid = inode->i_uid; ++ de->inode.gid = inode->i_gid; ++ de->inode.atime = inode->i_atime; ++ de->inode.mtime = inode->i_mtime; ++ de->inode.ctime = inode->i_ctime; ++ if ((iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) && ++ !is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_CHANGE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ return 0; ++} /* End Function devfs_notify_change */ ++ ++static struct super_operations devfs_sops = { ++ .drop_inode = generic_delete_inode, ++ .statfs = simple_statfs, ++}; ++ ++/** ++ * _devfs_get_vfs_inode - Get a VFS inode. ++ * @sb: The super block. ++ * @de: The devfs inode. ++ * @dentry: The dentry to register with the devfs inode. ++ * ++ * Returns the inode on success, else %NULL. An implicit devfs_get() is ++ * performed if the inode is created. ++ */ ++ ++static struct inode *_devfs_get_vfs_inode(struct super_block *sb, ++ struct devfs_entry *de, ++ struct dentry *dentry) ++{ ++ struct inode *inode; ++ ++ if (de->prev == de) ++ return NULL; /* Quick check to see if unhooked */ ++ if ((inode = new_inode(sb)) == NULL) { ++ PRINTK("(%s): new_inode() failed, de: %p\n", de->name, de); ++ return NULL; ++ } ++ if (de->parent) { ++ read_lock(&de->parent->u.dir.lock); ++ if (de->prev != de) ++ de->inode.dentry = dentry; /* Not unhooked */ ++ read_unlock(&de->parent->u.dir.lock); ++ } else ++ de->inode.dentry = dentry; /* Root: no locking needed */ ++ if (de->inode.dentry != dentry) { /* Must have been unhooked */ ++ iput(inode); ++ return NULL; ++ } ++ /* FIXME where is devfs_put? */ ++ inode->i_private = devfs_get(de); ++ inode->i_ino = de->inode.ino; ++ DPRINTK(DEBUG_I_GET, "(%d): VFS inode: %p devfs_entry: %p\n", ++ (int)inode->i_ino, inode, de); ++ inode->i_blocks = 0; ++ inode->i_op = &devfs_iops; ++ inode->i_mode = de->mode; ++ if (S_ISDIR(de->mode)) { ++ inode->i_op = &devfs_dir_iops; ++ inode->i_fop = &devfs_dir_fops; ++ } else if (S_ISLNK(de->mode)) { ++ inode->i_op = &devfs_symlink_iops; ++ inode->i_size = de->u.symlink.length; ++ } else if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) { ++ init_special_inode(inode, de->mode, de->u.dev); ++ } else if (S_ISFIFO(de->mode) || S_ISSOCK(de->mode)) { ++ init_special_inode(inode, de->mode, 0); ++ } else { ++ PRINTK("(%s): unknown mode %o de: %p\n", ++ de->name, de->mode, de); ++ iput(inode); ++ devfs_put(de); ++ return NULL; ++ } ++ ++ inode->i_uid = de->inode.uid; ++ inode->i_gid = de->inode.gid; ++ inode->i_atime = de->inode.atime; ++ inode->i_mtime = de->inode.mtime; ++ inode->i_ctime = de->inode.ctime; ++ DPRINTK(DEBUG_I_GET, "(): mode: 0%o uid: %d gid: %d\n", ++ (int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid); ++ return inode; ++} /* End Function _devfs_get_vfs_inode */ ++ ++/* File operations for device entries follow */ ++ ++static int devfs_readdir(struct file *file, void *dirent, filldir_t filldir) ++{ ++ int err, count; ++ int stored = 0; ++ struct fs_info *fs_info; ++ struct devfs_entry *parent, *de, *next = NULL; ++ struct inode *inode = file->f_dentry->d_inode; ++ ++ fs_info = inode->i_sb->s_fs_info; ++ parent = get_devfs_entry_from_vfs_inode(file->f_dentry->d_inode); ++ if ((long)file->f_pos < 0) ++ return -EINVAL; ++ DPRINTK(DEBUG_F_READDIR, "(%s): fs_info: %p pos: %ld\n", ++ parent->name, fs_info, (long)file->f_pos); ++ switch ((long)file->f_pos) { ++ case 0: ++ err = (*filldir) (dirent, "..", 2, file->f_pos, ++ parent_ino(file->f_dentry), DT_DIR); ++ if (err == -EINVAL) ++ break; ++ if (err < 0) ++ return err; ++ file->f_pos++; ++ ++stored; ++ /* Fall through */ ++ case 1: ++ err = ++ (*filldir) (dirent, ".", 1, file->f_pos, inode->i_ino, ++ DT_DIR); ++ if (err == -EINVAL) ++ break; ++ if (err < 0) ++ return err; ++ file->f_pos++; ++ ++stored; ++ /* Fall through */ ++ default: ++ /* Skip entries */ ++ count = file->f_pos - 2; ++ read_lock(&parent->u.dir.lock); ++ for (de = parent->u.dir.first; de && (count > 0); de = de->next) ++ --count; ++ devfs_get(de); ++ read_unlock(&parent->u.dir.lock); ++ /* Now add all remaining entries */ ++ while (de) { ++ err = (*filldir) (dirent, de->name, de->namelen, ++ file->f_pos, de->inode.ino, ++ de->mode >> 12); ++ if (err < 0) ++ devfs_put(de); ++ else { ++ file->f_pos++; ++ ++stored; ++ } ++ if (err == -EINVAL) ++ break; ++ if (err < 0) ++ return err; ++ read_lock(&parent->u.dir.lock); ++ next = devfs_get(de->next); ++ read_unlock(&parent->u.dir.lock); ++ devfs_put(de); ++ de = next; ++ } ++ break; ++ } ++ return stored; ++} /* End Function devfs_readdir */ ++ ++/* Open devfs specific special files */ ++static int devfs_open(struct inode *inode, struct file *file) ++{ ++ int err; ++ int minor = MINOR(inode->i_rdev); ++ struct file_operations *old_fops, *new_fops; ++ ++ switch (minor) { ++ case 0: /* /dev/.devfsd */ ++ new_fops = fops_get(&devfsd_fops); ++ break; ++#ifdef CONFIG_DEVFS_DEBUG ++ case 1: /* /dev/.stat */ ++ new_fops = fops_get(&stat_fops); ++ break; ++#endif ++ default: ++ return -ENODEV; ++ } ++ ++ if (new_fops == NULL) ++ return -ENODEV; ++ old_fops = file->f_op; ++ file->f_op = new_fops; ++ err = new_fops->open ? new_fops->open(inode, file) : 0; ++ if (err) { ++ file->f_op = old_fops; ++ fops_put(new_fops); ++ } else ++ fops_put(old_fops); ++ return err; ++} /* End Function devfs_open */ ++ ++static const struct file_operations devfs_fops = { ++ .open = devfs_open, ++}; ++ ++static const struct file_operations devfs_dir_fops = { ++ .read = generic_read_dir, ++ .readdir = devfs_readdir, ++}; ++ ++/* Dentry operations for device entries follow */ ++ ++/** ++ * devfs_d_release - Callback for when a dentry is freed. ++ * @dentry: The dentry. ++ */ ++ ++static void devfs_d_release(struct dentry *dentry) ++{ ++ DPRINTK(DEBUG_D_RELEASE, "(%p): inode: %p\n", dentry, dentry->d_inode); ++} /* End Function devfs_d_release */ ++ ++/** ++ * devfs_d_iput - Callback for when a dentry loses its inode. ++ * @dentry: The dentry. ++ * @inode: The inode. ++ */ ++ ++static void devfs_d_iput(struct dentry *dentry, struct inode *inode) ++{ ++ struct devfs_entry *de; ++ ++ de = get_devfs_entry_from_vfs_inode(inode); ++ DPRINTK(DEBUG_D_IPUT, ++ "(%s): dentry: %p inode: %p de: %p de->dentry: %p\n", de->name, ++ dentry, inode, de, de->inode.dentry); ++ if (de->inode.dentry && (de->inode.dentry != dentry)) ++ OOPS("(%s): de: %p dentry: %p de->dentry: %p\n", ++ de->name, de, dentry, de->inode.dentry); ++ de->inode.dentry = NULL; ++ iput(inode); ++ devfs_put(de); ++} /* End Function devfs_d_iput */ ++ ++static int devfs_d_delete(struct dentry *dentry); ++ ++static struct dentry_operations devfs_dops = { ++ .d_delete = devfs_d_delete, ++ .d_release = devfs_d_release, ++ .d_iput = devfs_d_iput, ++}; ++ ++static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *); ++ ++static struct dentry_operations devfs_wait_dops = { ++ .d_delete = devfs_d_delete, ++ .d_release = devfs_d_release, ++ .d_iput = devfs_d_iput, ++ .d_revalidate = devfs_d_revalidate_wait, ++}; ++ ++/** ++ * devfs_d_delete - Callback for when all files for a dentry are closed. ++ * @dentry: The dentry. ++ */ ++ ++static int devfs_d_delete(struct dentry *dentry) ++{ ++ struct inode *inode = dentry->d_inode; ++ ++ if (dentry->d_op == &devfs_wait_dops) ++ dentry->d_op = &devfs_dops; ++ /* Unhash dentry if negative (has no inode) */ ++ if (inode == NULL) { ++ DPRINTK(DEBUG_D_DELETE, "(%p): dropping negative dentry\n", ++ dentry); ++ return 1; ++ } ++ return 0; ++} /* End Function devfs_d_delete */ ++ ++struct devfs_lookup_struct { ++ devfs_handle_t de; ++ wait_queue_head_t wait_queue; ++}; ++ ++/* XXX: this doesn't handle the case where we got a negative dentry ++ but a devfs entry has been registered in the meanwhile */ ++static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd) ++{ ++ struct inode *dir = dentry->d_parent->d_inode; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ devfs_handle_t parent = get_devfs_entry_from_vfs_inode(dir); ++ struct devfs_lookup_struct *lookup_info = dentry->d_fsdata; ++ DECLARE_WAITQUEUE(wait, current); ++ int need_lock; ++ ++ /* ++ * FIXME HACK ++ * ++ * make sure that ++ * d_instantiate always runs under lock ++ * we release i_mutex lock before going to sleep ++ * ++ * unfortunately sometimes d_revalidate is called with ++ * and sometimes without i_mutex lock held. The following checks ++ * attempt to deduce when we need to add (and drop resp.) lock ++ * here. This relies on current (2.6.2) calling coventions: ++ * ++ * lookup_hash is always run under i_mutex and is passing NULL ++ * as nd ++ * ++ * open(...,O_CREATE,...) calls _lookup_hash under i_mutex ++ * and sets flags to LOOKUP_OPEN|LOOKUP_CREATE ++ * ++ * all other invocations of ->d_revalidate seem to happen ++ * outside of i_mutex ++ */ ++ need_lock = nd && ++ (!(nd->flags & LOOKUP_CREATE) || (nd->flags & LOOKUP_PARENT)); ++ ++ if (need_lock) ++ mutex_lock(&dir->i_mutex); ++ ++ if (is_devfsd_or_child(fs_info)) { ++ devfs_handle_t de = lookup_info->de; ++ struct inode *inode; ++ ++ DPRINTK(DEBUG_I_LOOKUP, ++ "(%s): dentry: %p inode: %p de: %p by: \"%s\"\n", ++ dentry->d_name.name, dentry, dentry->d_inode, de, ++ current->comm); ++ if (dentry->d_inode) ++ goto out; ++ if (de == NULL) { ++ read_lock(&parent->u.dir.lock); ++ de = _devfs_search_dir(parent, dentry->d_name.name, ++ dentry->d_name.len); ++ read_unlock(&parent->u.dir.lock); ++ if (de == NULL) ++ goto out; ++ lookup_info->de = de; ++ } ++ /* Create an inode, now that the driver information is available */ ++ inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry); ++ if (!inode) ++ goto out; ++ DPRINTK(DEBUG_I_LOOKUP, ++ "(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n", ++ de->name, de->inode.ino, inode, de, current->comm); ++ d_instantiate(dentry, inode); ++ goto out; ++ } ++ if (lookup_info == NULL) ++ goto out; /* Early termination */ ++ read_lock(&parent->u.dir.lock); ++ if (dentry->d_fsdata) { ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ add_wait_queue(&lookup_info->wait_queue, &wait); ++ read_unlock(&parent->u.dir.lock); ++ /* at this point it is always (hopefully) locked */ ++ mutex_unlock(&dir->i_mutex); ++ schedule(); ++ mutex_lock(&dir->i_mutex); ++ /* ++ * This does not need nor should remove wait from wait_queue. ++ * Wait queue head is never reused - nothing is ever added to it ++ * after all waiters have been waked up and head itself disappears ++ * very soon after it. Moreover it is local variable on stack that ++ * is likely to have already disappeared so any reference to it ++ * at this point is buggy. ++ */ ++ ++ } else ++ read_unlock(&parent->u.dir.lock); ++ ++ out: ++ if (need_lock) ++ mutex_unlock(&dir->i_mutex); ++ return 1; ++} /* End Function devfs_d_revalidate_wait */ ++ ++/* Inode operations for device entries follow */ ++ ++static struct dentry *devfs_lookup(struct inode *dir, struct dentry *dentry, ++ struct nameidata *nd) ++{ ++ struct devfs_entry tmp; /* Must stay in scope until devfsd idle again */ ++ struct devfs_lookup_struct lookup_info; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ struct devfs_entry *parent, *de; ++ struct inode *inode; ++ struct dentry *retval = NULL; ++ ++ /* Set up the dentry operations before anything else, to ensure cleaning ++ up on any error */ ++ dentry->d_op = &devfs_dops; ++ /* First try to get the devfs entry for this directory */ ++ parent = get_devfs_entry_from_vfs_inode(dir); ++ DPRINTK(DEBUG_I_LOOKUP, "(%s): dentry: %p parent: %p by: \"%s\"\n", ++ dentry->d_name.name, dentry, parent, current->comm); ++ if (parent == NULL) ++ return ERR_PTR(-ENOENT); ++ read_lock(&parent->u.dir.lock); ++ de = _devfs_search_dir(parent, dentry->d_name.name, dentry->d_name.len); ++ read_unlock(&parent->u.dir.lock); ++ lookup_info.de = de; ++ init_waitqueue_head(&lookup_info.wait_queue); ++ dentry->d_fsdata = &lookup_info; ++ if (de == NULL) { /* Try with devfsd. For any kind of failure, leave a negative dentry ++ so someone else can deal with it (in the case where the sysadmin ++ does a mknod()). It's important to do this before hashing the ++ dentry, so that the devfsd queue is filled before revalidates ++ can start */ ++ if (try_modload(parent, fs_info, dentry->d_name.name, dentry->d_name.len, &tmp) < 0) { /* Lookup event was not queued to devfsd */ ++ d_add(dentry, NULL); ++ return NULL; ++ } ++ } ++ dentry->d_op = &devfs_wait_dops; ++ d_add(dentry, NULL); /* Open the floodgates */ ++ /* Unlock directory semaphore, which will release any waiters. They ++ will get the hashed dentry, and may be forced to wait for ++ revalidation */ ++ mutex_unlock(&dir->i_mutex); ++ wait_for_devfsd_finished(fs_info); /* If I'm not devfsd, must wait */ ++ mutex_lock(&dir->i_mutex); /* Grab it again because them's the rules */ ++ de = lookup_info.de; ++ /* If someone else has been so kind as to make the inode, we go home ++ early */ ++ if (dentry->d_inode) ++ goto out; ++ if (de == NULL) { ++ read_lock(&parent->u.dir.lock); ++ de = _devfs_search_dir(parent, dentry->d_name.name, ++ dentry->d_name.len); ++ read_unlock(&parent->u.dir.lock); ++ if (de == NULL) ++ goto out; ++ /* OK, there's an entry now, but no VFS inode yet */ ++ } ++ /* Create an inode, now that the driver information is available */ ++ inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry); ++ if (!inode) { ++ retval = ERR_PTR(-ENOMEM); ++ goto out; ++ } ++ DPRINTK(DEBUG_I_LOOKUP, ++ "(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n", de->name, ++ de->inode.ino, inode, de, current->comm); ++ d_instantiate(dentry, inode); ++ out: ++ write_lock(&parent->u.dir.lock); ++ dentry->d_op = &devfs_dops; ++ dentry->d_fsdata = NULL; ++ wake_up(&lookup_info.wait_queue); ++ write_unlock(&parent->u.dir.lock); ++ devfs_put(de); ++ return retval; ++} /* End Function devfs_lookup */ ++ ++static int devfs_unlink(struct inode *dir, struct dentry *dentry) ++{ ++ int unhooked; ++ struct devfs_entry *de; ++ struct inode *inode = dentry->d_inode; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ ++ de = get_devfs_entry_from_vfs_inode(inode); ++ DPRINTK(DEBUG_I_UNLINK, "(%s): de: %p\n", dentry->d_name.name, de); ++ if (de == NULL) ++ return -ENOENT; ++ if (!de->vfs) ++ return -EPERM; ++ write_lock(&de->parent->u.dir.lock); ++ unhooked = _devfs_unhook(de); ++ write_unlock(&de->parent->u.dir.lock); ++ if (!unhooked) ++ return -ENOENT; ++ if (!is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ free_dentry(de); ++ devfs_put(de); ++ return 0; ++} /* End Function devfs_unlink */ ++ ++static int devfs_symlink(struct inode *dir, struct dentry *dentry, ++ const char *symname) ++{ ++ int err; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ struct devfs_entry *parent, *de; ++ struct inode *inode; ++ ++ /* First try to get the devfs entry for this directory */ ++ parent = get_devfs_entry_from_vfs_inode(dir); ++ if (parent == NULL) ++ return -ENOENT; ++ err = devfs_do_symlink(parent, dentry->d_name.name, symname, &de); ++ DPRINTK(DEBUG_DISABLED, "(%s): errcode from <devfs_do_symlink>: %d\n", ++ dentry->d_name.name, err); ++ if (err < 0) ++ return err; ++ de->vfs = TRUE; ++ de->inode.uid = current->euid; ++ de->inode.gid = current->egid; ++ de->inode.atime = CURRENT_TIME; ++ de->inode.mtime = CURRENT_TIME; ++ de->inode.ctime = CURRENT_TIME; ++ if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL) ++ return -ENOMEM; ++ DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p dentry: %p\n", ++ dentry->d_name.name, de->inode.ino, inode, dentry); ++ d_instantiate(dentry, inode); ++ if (!is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ return 0; ++} /* End Function devfs_symlink */ ++ ++static int devfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) ++{ ++ int err; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ struct devfs_entry *parent, *de; ++ struct inode *inode; ++ ++ mode = (mode & ~S_IFMT) | S_IFDIR; /* VFS doesn't pass S_IFMT part */ ++ parent = get_devfs_entry_from_vfs_inode(dir); ++ if (parent == NULL) ++ return -ENOENT; ++ de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode); ++ if (!de) ++ return -ENOMEM; ++ de->vfs = TRUE; ++ if ((err = _devfs_append_entry(parent, de, NULL)) != 0) ++ return err; ++ de->inode.uid = current->euid; ++ de->inode.gid = current->egid; ++ de->inode.atime = CURRENT_TIME; ++ de->inode.mtime = CURRENT_TIME; ++ de->inode.ctime = CURRENT_TIME; ++ if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL) ++ return -ENOMEM; ++ DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p dentry: %p\n", ++ dentry->d_name.name, de->inode.ino, inode, dentry); ++ d_instantiate(dentry, inode); ++ if (!is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ return 0; ++} /* End Function devfs_mkdir */ ++ ++static int devfs_rmdir(struct inode *dir, struct dentry *dentry) ++{ ++ int err = 0; ++ struct devfs_entry *de; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ struct inode *inode = dentry->d_inode; ++ ++ if (dir->i_sb->s_fs_info != inode->i_sb->s_fs_info) ++ return -EINVAL; ++ de = get_devfs_entry_from_vfs_inode(inode); ++ if (de == NULL) ++ return -ENOENT; ++ if (!S_ISDIR(de->mode)) ++ return -ENOTDIR; ++ if (!de->vfs) ++ return -EPERM; ++ /* First ensure the directory is empty and will stay that way */ ++ write_lock(&de->u.dir.lock); ++ if (de->u.dir.first) ++ err = -ENOTEMPTY; ++ else ++ de->u.dir.no_more_additions = TRUE; ++ write_unlock(&de->u.dir.lock); ++ if (err) ++ return err; ++ /* Now unhook the directory from its parent */ ++ write_lock(&de->parent->u.dir.lock); ++ if (!_devfs_unhook(de)) ++ err = -ENOENT; ++ write_unlock(&de->parent->u.dir.lock); ++ if (err) ++ return err; ++ if (!is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ free_dentry(de); ++ devfs_put(de); ++ return 0; ++} /* End Function devfs_rmdir */ ++ ++static int devfs_mknod(struct inode *dir, struct dentry *dentry, int mode, ++ dev_t rdev) ++{ ++ int err; ++ struct fs_info *fs_info = dir->i_sb->s_fs_info; ++ struct devfs_entry *parent, *de; ++ struct inode *inode; ++ ++ DPRINTK(DEBUG_I_MKNOD, "(%s): mode: 0%o dev: %u:%u\n", ++ dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); ++ parent = get_devfs_entry_from_vfs_inode(dir); ++ if (parent == NULL) ++ return -ENOENT; ++ de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode); ++ if (!de) ++ return -ENOMEM; ++ de->vfs = TRUE; ++ if (S_ISCHR(mode) || S_ISBLK(mode)) ++ de->u.dev = rdev; ++ if ((err = _devfs_append_entry(parent, de, NULL)) != 0) ++ return err; ++ de->inode.uid = current->euid; ++ de->inode.gid = current->egid; ++ de->inode.atime = CURRENT_TIME; ++ de->inode.mtime = CURRENT_TIME; ++ de->inode.ctime = CURRENT_TIME; ++ if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL) ++ return -ENOMEM; ++ DPRINTK(DEBUG_I_MKNOD, ": new VFS inode(%u): %p dentry: %p\n", ++ de->inode.ino, inode, dentry); ++ d_instantiate(dentry, inode); ++ if (!is_devfsd_or_child(fs_info)) ++ devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode, ++ inode->i_uid, inode->i_gid, fs_info); ++ return 0; ++} /* End Function devfs_mknod */ ++ ++static void *devfs_follow_link(struct dentry *dentry, struct nameidata *nd) ++{ ++ struct devfs_entry *p = get_devfs_entry_from_vfs_inode(dentry->d_inode); ++ nd_set_link(nd, p ? p->u.symlink.linkname : ERR_PTR(-ENODEV)); ++ return NULL; ++} /* End Function devfs_follow_link */ ++ ++static struct inode_operations devfs_iops = { ++ .setattr = devfs_notify_change, ++}; ++ ++static struct inode_operations devfs_dir_iops = { ++ .lookup = devfs_lookup, ++ .unlink = devfs_unlink, ++ .symlink = devfs_symlink, ++ .mkdir = devfs_mkdir, ++ .rmdir = devfs_rmdir, ++ .mknod = devfs_mknod, ++ .setattr = devfs_notify_change, ++}; ++ ++static struct inode_operations devfs_symlink_iops = { ++ .readlink = generic_readlink, ++ .follow_link = devfs_follow_link, ++ .setattr = devfs_notify_change, ++}; ++ ++static int devfs_fill_super(struct super_block *sb, void *data, int silent) ++{ ++ struct inode *root_inode = NULL; ++ ++ if (_devfs_get_root_entry() == NULL) ++ goto out_no_root; ++ atomic_set(&fs_info.devfsd_overrun_count, 0); ++ init_waitqueue_head(&fs_info.devfsd_wait_queue); ++ init_waitqueue_head(&fs_info.revalidate_wait_queue); ++ fs_info.sb = sb; ++ sb->s_fs_info = &fs_info; ++ sb->s_blocksize = 1024; ++ sb->s_blocksize_bits = 10; ++ sb->s_magic = DEVFS_SUPER_MAGIC; ++ sb->s_op = &devfs_sops; ++ sb->s_time_gran = 1; ++ if ((root_inode = _devfs_get_vfs_inode(sb, root_entry, NULL)) == NULL) ++ goto out_no_root; ++ sb->s_root = d_alloc_root(root_inode); ++ if (!sb->s_root) ++ goto out_no_root; ++ DPRINTK(DEBUG_S_READ, "(): made devfs ptr: %p\n", sb->s_fs_info); ++ return 0; ++ ++ out_no_root: ++ PRINTK("(): get root inode failed\n"); ++ if (root_inode) ++ iput(root_inode); ++ return -EINVAL; ++} /* End Function devfs_fill_super */ ++ ++static int devfs_get_sb(struct file_system_type *fs_type, ++ int flags, const char *dev_name, ++ void *data, struct vfsmount *mnt) ++{ ++ return get_sb_single(fs_type, flags, data, devfs_fill_super, mnt); ++} ++ ++static struct file_system_type devfs_fs_type = { ++ .name = DEVFS_NAME, ++ .get_sb = devfs_get_sb, ++ .kill_sb = kill_anon_super, ++}; ++ ++/* File operations for devfsd follow */ ++ ++static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len, ++ loff_t * ppos) ++{ ++ int done = FALSE; ++ int ival; ++ loff_t pos, devname_offset, tlen, rpos; ++ devfs_handle_t de; ++ struct devfsd_buf_entry *entry; ++ struct fs_info *fs_info = file->f_dentry->d_inode->i_sb->s_fs_info; ++ struct devfsd_notify_struct *info = fs_info->devfsd_info; ++ DECLARE_WAITQUEUE(wait, current); ++ ++ /* Verify the task has grabbed the queue */ ++ if (fs_info->devfsd_task != current) ++ return -EPERM; ++ info->major = 0; ++ info->minor = 0; ++ /* Block for a new entry */ ++ set_current_state(TASK_INTERRUPTIBLE); ++ add_wait_queue(&fs_info->devfsd_wait_queue, &wait); ++ while (devfsd_queue_empty(fs_info)) { ++ fs_info->devfsd_sleeping = TRUE; ++ wake_up(&fs_info->revalidate_wait_queue); ++ schedule(); ++ fs_info->devfsd_sleeping = FALSE; ++ if (signal_pending(current)) { ++ remove_wait_queue(&fs_info->devfsd_wait_queue, &wait); ++ __set_current_state(TASK_RUNNING); ++ return -EINTR; ++ } ++ set_current_state(TASK_INTERRUPTIBLE); ++ } ++ remove_wait_queue(&fs_info->devfsd_wait_queue, &wait); ++ __set_current_state(TASK_RUNNING); ++ /* Now play with the data */ ++ ival = atomic_read(&fs_info->devfsd_overrun_count); ++ info->overrun_count = ival; ++ entry = fs_info->devfsd_first_event; ++ info->type = entry->type; ++ info->mode = entry->mode; ++ info->uid = entry->uid; ++ info->gid = entry->gid; ++ de = entry->de; ++ if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) { ++ info->major = MAJOR(de->u.dev); ++ info->minor = MINOR(de->u.dev); ++ } ++ pos = devfs_generate_path(de, info->devname, DEVFS_PATHLEN); ++ if (pos < 0) ++ return pos; ++ info->namelen = DEVFS_PATHLEN - pos - 1; ++ if (info->mode == 0) ++ info->mode = de->mode; ++ devname_offset = info->devname - (char *)info; ++ rpos = *ppos; ++ if (rpos < devname_offset) { ++ /* Copy parts of the header */ ++ tlen = devname_offset - rpos; ++ if (tlen > len) ++ tlen = len; ++ if (copy_to_user(buf, (char *)info + rpos, tlen)) { ++ return -EFAULT; ++ } ++ rpos += tlen; ++ buf += tlen; ++ len -= tlen; ++ } ++ if ((rpos >= devname_offset) && (len > 0)) { ++ /* Copy the name */ ++ tlen = info->namelen + 1; ++ if (tlen > len) ++ tlen = len; ++ else ++ done = TRUE; ++ if (copy_to_user ++ (buf, info->devname + pos + rpos - devname_offset, tlen)) { ++ return -EFAULT; ++ } ++ rpos += tlen; ++ } ++ tlen = rpos - *ppos; ++ if (done) { ++ devfs_handle_t parent; ++ ++ spin_lock(&fs_info->devfsd_buffer_lock); ++ fs_info->devfsd_first_event = entry->next; ++ if (entry->next == NULL) ++ fs_info->devfsd_last_event = NULL; ++ spin_unlock(&fs_info->devfsd_buffer_lock); ++ for (; de != NULL; de = parent) { ++ parent = de->parent; ++ devfs_put(de); ++ } ++ kmem_cache_free(devfsd_buf_cache, entry); ++ if (ival > 0) ++ atomic_sub(ival, &fs_info->devfsd_overrun_count); ++ *ppos = 0; ++ } else ++ *ppos = rpos; ++ return tlen; ++} /* End Function devfsd_read */ ++ ++static int devfsd_ioctl(struct inode *inode, struct file *file, ++ unsigned int cmd, unsigned long arg) ++{ ++ int ival; ++ struct fs_info *fs_info = inode->i_sb->s_fs_info; ++ ++ switch (cmd) { ++ case DEVFSDIOC_GET_PROTO_REV: ++ ival = DEVFSD_PROTOCOL_REVISION_KERNEL; ++ if (copy_to_user((void __user *)arg, &ival, sizeof ival)) ++ return -EFAULT; ++ break; ++ case DEVFSDIOC_SET_EVENT_MASK: ++ /* Ensure only one reader has access to the queue. This scheme will ++ work even if the global kernel lock were to be removed, because it ++ doesn't matter who gets in first, as long as only one gets it */ ++ if (fs_info->devfsd_task == NULL) { ++ static DEFINE_SPINLOCK(lock); ++ ++ if (!spin_trylock(&lock)) ++ return -EBUSY; ++ if (fs_info->devfsd_task != NULL) { /* We lost the race... */ ++ spin_unlock(&lock); ++ return -EBUSY; ++ } ++ fs_info->devfsd_task = current; ++ spin_unlock(&lock); ++ fs_info->devfsd_pgrp = ++ (process_group(current) == ++ current->pid) ? process_group(current) : 0; ++ fs_info->devfsd_file = file; ++ fs_info->devfsd_info = ++ kmalloc(sizeof *fs_info->devfsd_info, GFP_KERNEL); ++ if (!fs_info->devfsd_info) { ++ devfsd_close(inode, file); ++ return -ENOMEM; ++ } ++ } else if (fs_info->devfsd_task != current) ++ return -EBUSY; ++ fs_info->devfsd_event_mask = arg; /* Let the masses come forth */ ++ break; ++ case DEVFSDIOC_RELEASE_EVENT_QUEUE: ++ if (fs_info->devfsd_file != file) ++ return -EPERM; ++ return devfsd_close(inode, file); ++ /*break; */ ++#ifdef CONFIG_DEVFS_DEBUG ++ case DEVFSDIOC_SET_DEBUG_MASK: ++ if (copy_from_user(&ival, (void __user *)arg, sizeof ival)) ++ return -EFAULT; ++ devfs_debug = ival; ++ break; ++#endif ++ default: ++ return -ENOIOCTLCMD; ++ } ++ return 0; ++} /* End Function devfsd_ioctl */ ++ ++static int devfsd_close(struct inode *inode, struct file *file) ++{ ++ struct devfsd_buf_entry *entry, *next; ++ struct fs_info *fs_info = inode->i_sb->s_fs_info; ++ ++ if (fs_info->devfsd_file != file) ++ return 0; ++ fs_info->devfsd_event_mask = 0; ++ fs_info->devfsd_file = NULL; ++ spin_lock(&fs_info->devfsd_buffer_lock); ++ entry = fs_info->devfsd_first_event; ++ fs_info->devfsd_first_event = NULL; ++ fs_info->devfsd_last_event = NULL; ++ kfree(fs_info->devfsd_info); ++ fs_info->devfsd_info = NULL; ++ spin_unlock(&fs_info->devfsd_buffer_lock); ++ fs_info->devfsd_pgrp = 0; ++ fs_info->devfsd_task = NULL; ++ wake_up(&fs_info->revalidate_wait_queue); ++ for (; entry; entry = next) { ++ next = entry->next; ++ kmem_cache_free(devfsd_buf_cache, entry); ++ } ++ return 0; ++} /* End Function devfsd_close */ ++ ++#ifdef CONFIG_DEVFS_DEBUG ++static ssize_t stat_read(struct file *file, char __user *buf, size_t len, ++ loff_t * ppos) ++{ ++ ssize_t num; ++ char txt[80]; ++ ++ num = sprintf(txt, "Number of entries: %u number of bytes: %u\n", ++ stat_num_entries, stat_num_bytes) + 1; ++ if (*ppos >= num) ++ return 0; ++ if (*ppos + len > num) ++ len = num - *ppos; ++ if (copy_to_user(buf, txt + *ppos, len)) ++ return -EFAULT; ++ *ppos += len; ++ return len; ++} /* End Function stat_read */ ++#endif ++ ++static int __init init_devfs_fs(void) ++{ ++ int err; ++ int major; ++ struct devfs_entry *devfsd; ++#ifdef CONFIG_DEVFS_DEBUG ++ struct devfs_entry *stat; ++#endif ++ ++ if (_devfs_get_root_entry() == NULL) ++ return -ENOMEM; ++ ++ printk(KERN_INFO "%s: %s Richard Gooch (rgooch@atnf.csiro.au)\n", ++ DEVFS_NAME, DEVFS_VERSION); ++ devfsd_buf_cache = kmem_cache_create("devfsd_event", ++ sizeof(struct devfsd_buf_entry), ++ 0, 0, NULL, NULL); ++ if (!devfsd_buf_cache) ++ OOPS("(): unable to allocate event slab\n"); ++#ifdef CONFIG_DEVFS_DEBUG ++ devfs_debug = devfs_debug_init; ++ printk(KERN_INFO "%s: devfs_debug: 0x%0x\n", DEVFS_NAME, devfs_debug); ++#endif ++ printk(KERN_INFO "%s: boot_options: 0x%0x\n", DEVFS_NAME, boot_options); ++ ++ /* register special device for devfsd communication */ ++ major = register_chrdev(0, "devfs", &devfs_fops); ++ if (major < 0) ++ return major; ++ ++ /* And create the entry for ".devfsd" */ ++ devfsd = _devfs_alloc_entry(".devfsd", 0, S_IFCHR | S_IRUSR | S_IWUSR); ++ if (devfsd == NULL) ++ return -ENOMEM; ++ devfsd->u.dev = MKDEV(major, 0); ++ _devfs_append_entry(root_entry, devfsd, NULL); ++ ++#ifdef CONFIG_DEVFS_DEBUG ++ stat = _devfs_alloc_entry(".stat", 0, S_IFCHR | S_IRUGO); ++ if (stat == NULL) ++ return -ENOMEM; ++ stat->u.dev = MKDEV(major, 1); ++ _devfs_append_entry(root_entry, stat, NULL); ++#endif ++ ++ err = register_filesystem(&devfs_fs_type); ++ return err; ++} /* End Function init_devfs_fs */ ++ ++void __init mount_devfs_fs(void) ++{ ++ int err; ++ ++ if (!(boot_options & OPTION_MOUNT)) ++ return; ++ err = do_mount("none", "/dev", "devfs", 0, NULL); ++ if (err == 0) ++ printk(KERN_INFO "Mounted devfs on /dev\n"); ++ else ++ PRINTK("(): unable to mount devfs, err: %d\n", err); ++} /* End Function mount_devfs_fs */ ++ ++module_init(init_devfs_fs) +diff -urN linux-2.6.19.old/fs/devfs/Makefile linux-2.6.19.dev/fs/devfs/Makefile +--- linux-2.6.19.old/fs/devfs/Makefile 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/fs/devfs/Makefile 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,8 @@ ++# ++# Makefile for the linux devfs-filesystem routines. ++# ++ ++obj-$(CONFIG_DEVFS_FS) += devfs.o ++ ++devfs-objs := base.o util.o ++ +diff -urN linux-2.6.19.old/fs/devfs/util.c linux-2.6.19.dev/fs/devfs/util.c +--- linux-2.6.19.old/fs/devfs/util.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/fs/devfs/util.c 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,97 @@ ++/* devfs (Device FileSystem) utilities. ++ ++ Copyright (C) 1999-2002 Richard Gooch ++ ++ This library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Library General Public ++ License as published by the Free Software Foundation; either ++ version 2 of the License, or (at your option) any later version. ++ ++ This library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Library General Public License for more details. ++ ++ You should have received a copy of the GNU Library General Public ++ License along with this library; if not, write to the Free ++ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ++ ++ Richard Gooch may be reached by email at rgooch@atnf.csiro.au ++ The postal address is: ++ Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia. ++ ++ ChangeLog ++ ++ 19991031 Richard Gooch <rgooch@atnf.csiro.au> ++ Created. ++ 19991103 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <_devfs_convert_name> and supported SCSI and IDE CD-ROMs ++ 20000203 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed operations pointer type to void *. ++ 20000621 Richard Gooch <rgooch@atnf.csiro.au> ++ Changed interface to <devfs_register_series>. ++ 20000622 Richard Gooch <rgooch@atnf.csiro.au> ++ Took account of interface change to <devfs_mk_symlink>. ++ Took account of interface change to <devfs_mk_dir>. ++ 20010519 Richard Gooch <rgooch@atnf.csiro.au> ++ Documentation cleanup. ++ 20010709 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_*alloc_major> and <devfs_*alloc_devnum>. ++ 20010710 Richard Gooch <rgooch@atnf.csiro.au> ++ Created <devfs_*alloc_unique_number>. ++ 20010730 Richard Gooch <rgooch@atnf.csiro.au> ++ Documentation typo fix. ++ 20010806 Richard Gooch <rgooch@atnf.csiro.au> ++ Made <block_semaphore> and <char_semaphore> private. ++ 20010813 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers ++ 20010818 Richard Gooch <rgooch@atnf.csiro.au> ++ Updated major masks up to Linus' "no new majors" proclamation. ++ Block: were 126 now 122 free, char: were 26 now 19 free. ++ 20020324 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bug in <devfs_alloc_unique_number>: was clearing beyond ++ bitfield. ++ 20020326 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed bitfield data type for <devfs_*alloc_devnum>. ++ Made major bitfield type and initialiser 64 bit safe. ++ 20020413 Richard Gooch <rgooch@atnf.csiro.au> ++ Fixed shift warning on 64 bit machines. ++ 20020428 Richard Gooch <rgooch@atnf.csiro.au> ++ Copied and used macro for error messages from fs/devfs/base.c ++ 20021013 Richard Gooch <rgooch@atnf.csiro.au> ++ Documentation fix. ++ 20030101 Adam J. Richter <adam@yggdrasil.com> ++ Eliminate DEVFS_SPECIAL_{CHR,BLK}. Use mode_t instead. ++ 20030106 Christoph Hellwig <hch@infradead.org> ++ Rewrite devfs_{,de}alloc_devnum to look like C code. ++*/ ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> ++#include <linux/slab.h> ++#include <linux/vmalloc.h> ++#include <linux/genhd.h> ++#include <linux/bitops.h> ++ ++int devfs_register_tape(const char *name) ++{ ++ char tname[32], dest[64]; ++ static unsigned int tape_counter; ++ unsigned int n = tape_counter++; ++ ++ sprintf(dest, "../%s", name); ++ sprintf(tname, "tapes/tape%u", n); ++ devfs_mk_symlink(tname, dest); ++ ++ return n; ++} ++ ++EXPORT_SYMBOL(devfs_register_tape); ++ ++void devfs_unregister_tape(int num) ++{ ++ if (num >= 0) ++ devfs_remove("tapes/tape%u", num); ++} ++ ++EXPORT_SYMBOL(devfs_unregister_tape); +diff -urN linux-2.6.19.old/fs/Kconfig linux-2.6.19.dev/fs/Kconfig +--- linux-2.6.19.old/fs/Kconfig 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/Kconfig 2006-12-14 03:12:59.000000000 +0100 +@@ -957,6 +957,56 @@ + building a kernel for install/rescue disks or your system is very + limited in memory. + ++config DEVFS_FS ++ bool "/dev file system support (OBSOLETE)" ++ depends on EXPERIMENTAL ++ help ++ This is support for devfs, a virtual file system (like /proc) which ++ provides the file system interface to device drivers, normally found ++ in /dev. Devfs does not depend on major and minor number ++ allocations. Device drivers register entries in /dev which then ++ appear automatically, which means that the system administrator does ++ not have to create character and block special device files in the ++ /dev directory using the mknod command (or MAKEDEV script) anymore. ++ ++ This is work in progress. If you want to use this, you *must* read ++ the material in <file:Documentation/filesystems/devfs/>, especially ++ the file README there. ++ ++ Note that devfs no longer manages /dev/pts! If you are using UNIX98 ++ ptys, you will also need to mount the /dev/pts filesystem (devpts). ++ ++ Note that devfs has been obsoleted by udev, ++ <http://www.kernel.org/pub/linux/utils/kernel/hotplug/>. ++ It has been stripped down to a bare minimum and is only provided for ++ legacy installations that use its naming scheme which is ++ unfortunately different from the names normal Linux installations ++ use. ++ ++ If unsure, say N. ++ ++config DEVFS_MOUNT ++ bool "Automatically mount at boot" ++ depends on DEVFS_FS ++ help ++ This option appears if you have CONFIG_DEVFS_FS enabled. Setting ++ this to 'Y' will make the kernel automatically mount devfs onto /dev ++ when the system is booted, before the init thread is started. ++ You can override this with the "devfs=nomount" boot option. ++ ++ If unsure, say N. ++ ++config DEVFS_DEBUG ++ bool "Debug devfs" ++ depends on DEVFS_FS ++ help ++ If you say Y here, then the /dev file system code will generate ++ debugging messages. See the file ++ <file:Documentation/filesystems/devfs/boot-options> for more ++ details. ++ ++ If unsure, say N. ++ + config SYSFS + bool "sysfs file system support" if EMBEDDED + default y +diff -urN linux-2.6.19.old/fs/Makefile linux-2.6.19.dev/fs/Makefile +--- linux-2.6.19.old/fs/Makefile 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/Makefile 2006-12-14 03:12:59.000000000 +0100 +@@ -76,6 +76,7 @@ + obj-$(CONFIG_VFAT_FS) += vfat/ + obj-$(CONFIG_BFS_FS) += bfs/ + obj-$(CONFIG_ISO9660_FS) += isofs/ ++obj-$(CONFIG_DEVFS_FS) += devfs/ + obj-$(CONFIG_HFSPLUS_FS) += hfsplus/ # Before hfs to find wrapped HFS+ + obj-$(CONFIG_HFS_FS) += hfs/ + obj-$(CONFIG_ECRYPT_FS) += ecryptfs/ +diff -urN linux-2.6.19.old/fs/partitions/check.c linux-2.6.19.dev/fs/partitions/check.c +--- linux-2.6.19.old/fs/partitions/check.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/partitions/check.c 2006-12-14 03:12:59.000000000 +0100 +@@ -18,8 +18,10 @@ + #include <linux/fs.h> + #include <linux/kmod.h> + #include <linux/ctype.h> ++#include <linux/devfs_fs_kernel.h> + + #include "check.h" ++#include "devfs.h" + + #include "acorn.h" + #include "amiga.h" +@@ -159,11 +161,18 @@ + if (!state) + return NULL; + +- disk_name(hd, 0, state->name); +- printk(KERN_INFO " %s:", state->name); +- if (isdigit(state->name[strlen(state->name)-1])) ++#ifdef CONFIG_DEVFS_FS ++ if (hd->devfs_name[0] != '\0') { ++ printk(KERN_INFO " /dev/%s:", hd->devfs_name); + sprintf(state->name, "p"); +- ++ } ++#endif ++ else { ++ disk_name(hd, 0, state->name); ++ printk(KERN_INFO " %s:", state->name); ++ if (isdigit(state->name[strlen(state->name)-1])) ++ sprintf(state->name, "p"); ++ } + state->limit = hd->minors; + i = res = 0; + while (!res && check_part[i]) { +@@ -319,7 +328,7 @@ + p->nr_sects = 0; + p->ios[0] = p->ios[1] = 0; + p->sectors[0] = p->sectors[1] = 0; +- sysfs_remove_link(&p->kobj, "subsystem"); ++ devfs_remove("%s/part%d", disk->devfs_name, part); + if (p->holder_dir) + kobject_unregister(p->holder_dir); + kobject_uevent(&p->kobj, KOBJ_REMOVE); +@@ -339,7 +348,10 @@ + p->start_sect = start; + p->nr_sects = len; + p->partno = part; +- p->policy = disk->policy; ++ ++ devfs_mk_bdev(MKDEV(disk->major, disk->first_minor + part), ++ S_IFBLK|S_IRUSR|S_IWUSR, ++ "%s/part%d", disk->devfs_name, part); + + if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1])) + snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part); +@@ -444,8 +456,14 @@ + disk_sysfs_add_subdirs(disk); + + /* No minors to use for partitions */ +- if (disk->minors == 1) ++ if (disk->minors == 1) { ++ if (disk->devfs_name[0] != '\0') ++ devfs_add_disk(disk); + goto exit; ++ } ++ ++ /* always add handle for the whole disk */ ++ devfs_add_partitioned(disk); + + /* No such device (e.g., media were just removed) */ + if (!get_capacity(disk)) +@@ -553,6 +571,8 @@ + disk_stat_set_all(disk, 0); + disk->stamp = 0; + ++ devfs_remove_disk(disk); ++ + kobject_uevent(&disk->kobj, KOBJ_REMOVE); + if (disk->holder_dir) + kobject_unregister(disk->holder_dir); +diff -urN linux-2.6.19.old/fs/partitions/devfs.c linux-2.6.19.dev/fs/partitions/devfs.c +--- linux-2.6.19.old/fs/partitions/devfs.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/fs/partitions/devfs.c 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,130 @@ ++/* ++ * This tries to keep block devices away from devfs as much as possible. ++ */ ++#include <linux/fs.h> ++#include <linux/devfs_fs_kernel.h> ++#include <linux/vmalloc.h> ++#include <linux/genhd.h> ++#include <linux/bitops.h> ++#include <linux/mutex.h> ++ ++ ++struct unique_numspace { ++ u32 num_free; /* Num free in bits */ ++ u32 length; /* Array length in bytes */ ++ unsigned long *bits; ++ struct semaphore mutex; ++}; ++ ++static DEFINE_MUTEX(numspace_mutex); ++ ++static int expand_numspace(struct unique_numspace *s) ++{ ++ u32 length; ++ void *bits; ++ ++ if (s->length < 16) ++ length = 16; ++ else ++ length = s->length << 1; ++ ++ bits = vmalloc(length); ++ if (!bits) ++ return -ENOMEM; ++ if (s->bits) { ++ memcpy(bits, s->bits, s->length); ++ vfree(s->bits); ++ } ++ ++ s->num_free = (length - s->length) << 3; ++ s->bits = bits; ++ memset(bits + s->length, 0, length - s->length); ++ s->length = length; ++ ++ return 0; ++} ++ ++static int alloc_unique_number(struct unique_numspace *s) ++{ ++ int rval = 0; ++ ++ mutex_lock(&numspace_mutex); ++ if (s->num_free < 1) ++ rval = expand_numspace(s); ++ if (!rval) { ++ rval = find_first_zero_bit(s->bits, s->length << 3); ++ --s->num_free; ++ __set_bit(rval, s->bits); ++ } ++ mutex_unlock(&numspace_mutex); ++ ++ return rval; ++} ++ ++static void dealloc_unique_number(struct unique_numspace *s, int number) ++{ ++ int old_val; ++ ++ if (number >= 0) { ++ mutex_lock(&numspace_mutex); ++ old_val = __test_and_clear_bit(number, s->bits); ++ if (old_val) ++ ++s->num_free; ++ mutex_unlock(&numspace_mutex); ++ } ++} ++ ++static struct unique_numspace disc_numspace; ++static struct unique_numspace cdrom_numspace; ++ ++void devfs_add_partitioned(struct gendisk *disk) ++{ ++ char dirname[64], symlink[16]; ++ ++ devfs_mk_dir(disk->devfs_name); ++ devfs_mk_bdev(MKDEV(disk->major, disk->first_minor), ++ S_IFBLK|S_IRUSR|S_IWUSR, ++ "%s/disc", disk->devfs_name); ++ ++ disk->number = alloc_unique_number(&disc_numspace); ++ ++ sprintf(symlink, "discs/disc%d", disk->number); ++ sprintf(dirname, "../%s", disk->devfs_name); ++ devfs_mk_symlink(symlink, dirname); ++ ++} ++ ++void devfs_add_disk(struct gendisk *disk) ++{ ++ devfs_mk_bdev(MKDEV(disk->major, disk->first_minor), ++ (disk->flags & GENHD_FL_CD) ? ++ S_IFBLK|S_IRUGO|S_IWUGO : ++ S_IFBLK|S_IRUSR|S_IWUSR, ++ "%s", disk->devfs_name); ++ ++ if (disk->flags & GENHD_FL_CD) { ++ char dirname[64], symlink[16]; ++ ++ disk->number = alloc_unique_number(&cdrom_numspace); ++ ++ sprintf(symlink, "cdroms/cdrom%d", disk->number); ++ sprintf(dirname, "../%s", disk->devfs_name); ++ devfs_mk_symlink(symlink, dirname); ++ } ++} ++ ++void devfs_remove_disk(struct gendisk *disk) ++{ ++ if (disk->minors != 1) { ++ devfs_remove("discs/disc%d", disk->number); ++ dealloc_unique_number(&disc_numspace, disk->number); ++ devfs_remove("%s/disc", disk->devfs_name); ++ } ++ if (disk->flags & GENHD_FL_CD) { ++ devfs_remove("cdroms/cdrom%d", disk->number); ++ dealloc_unique_number(&cdrom_numspace, disk->number); ++ } ++ devfs_remove(disk->devfs_name); ++} ++ ++ +diff -urN linux-2.6.19.old/fs/partitions/devfs.h linux-2.6.19.dev/fs/partitions/devfs.h +--- linux-2.6.19.old/fs/partitions/devfs.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/fs/partitions/devfs.h 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,10 @@ ++ ++#ifdef CONFIG_DEVFS_FS ++void devfs_add_disk(struct gendisk *dev); ++void devfs_add_partitioned(struct gendisk *dev); ++void devfs_remove_disk(struct gendisk *dev); ++#else ++# define devfs_add_disk(disk) do { } while (0) ++# define devfs_add_partitioned(disk) do { } while (0) ++# define devfs_remove_disk(disk) do { } while (0) ++#endif +diff -urN linux-2.6.19.old/fs/partitions/Makefile linux-2.6.19.dev/fs/partitions/Makefile +--- linux-2.6.19.old/fs/partitions/Makefile 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/fs/partitions/Makefile 2006-12-14 03:12:59.000000000 +0100 +@@ -4,6 +4,7 @@ + + obj-$(CONFIG_BLOCK) := check.o + ++obj-$(CONFIG_DEVFS_FS) += devfs.o + obj-$(CONFIG_ACORN_PARTITION) += acorn.o + obj-$(CONFIG_AMIGA_PARTITION) += amiga.o + obj-$(CONFIG_ATARI_PARTITION) += atari.o +diff -urN linux-2.6.19.old/include/asm-ppc/ocp.h linux-2.6.19.dev/include/asm-ppc/ocp.h +--- linux-2.6.19.old/include/asm-ppc/ocp.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/asm-ppc/ocp.h 2006-12-14 03:12:59.000000000 +0100 +@@ -26,6 +26,7 @@ + + #include <linux/init.h> + #include <linux/list.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/device.h> + + #include <asm/mmu.h> +diff -urN linux-2.6.19.old/include/linux/compat_ioctl.h linux-2.6.19.dev/include/linux/compat_ioctl.h +--- linux-2.6.19.old/include/linux/compat_ioctl.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/compat_ioctl.h 2006-12-14 03:12:59.000000000 +0100 +@@ -571,6 +571,11 @@ + COMPATIBLE_IOCTL(AUTOFS_IOC_ASKREGHOST) + COMPATIBLE_IOCTL(AUTOFS_IOC_TOGGLEREGHOST) + COMPATIBLE_IOCTL(AUTOFS_IOC_ASKUMOUNT) ++/* DEVFS */ ++COMPATIBLE_IOCTL(DEVFSDIOC_GET_PROTO_REV) ++COMPATIBLE_IOCTL(DEVFSDIOC_SET_EVENT_MASK) ++COMPATIBLE_IOCTL(DEVFSDIOC_RELEASE_EVENT_QUEUE) ++COMPATIBLE_IOCTL(DEVFSDIOC_SET_DEBUG_MASK) + /* Raw devices */ + COMPATIBLE_IOCTL(RAW_SETBIND) + COMPATIBLE_IOCTL(RAW_GETBIND) +diff -urN linux-2.6.19.old/include/linux/devfs_fs.h linux-2.6.19.dev/include/linux/devfs_fs.h +--- linux-2.6.19.old/include/linux/devfs_fs.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/devfs_fs.h 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,41 @@ ++#ifndef _LINUX_DEVFS_FS_H ++#define _LINUX_DEVFS_FS_H ++ ++#include <linux/ioctl.h> ++ ++#define DEVFSD_PROTOCOL_REVISION_KERNEL 5 ++ ++#define DEVFSD_IOCTL_BASE 'd' ++ ++/* These are the various ioctls */ ++#define DEVFSDIOC_GET_PROTO_REV _IOR(DEVFSD_IOCTL_BASE, 0, int) ++#define DEVFSDIOC_SET_EVENT_MASK _IOW(DEVFSD_IOCTL_BASE, 2, int) ++#define DEVFSDIOC_RELEASE_EVENT_QUEUE _IOW(DEVFSD_IOCTL_BASE, 3, int) ++#define DEVFSDIOC_SET_DEBUG_MASK _IOW(DEVFSD_IOCTL_BASE, 4, int) ++ ++#define DEVFSD_NOTIFY_REGISTERED 0 ++#define DEVFSD_NOTIFY_UNREGISTERED 1 ++#define DEVFSD_NOTIFY_ASYNC_OPEN 2 ++#define DEVFSD_NOTIFY_CLOSE 3 ++#define DEVFSD_NOTIFY_LOOKUP 4 ++#define DEVFSD_NOTIFY_CHANGE 5 ++#define DEVFSD_NOTIFY_CREATE 6 ++#define DEVFSD_NOTIFY_DELETE 7 ++ ++#define DEVFS_PATHLEN 1024 /* Never change this otherwise the ++ binary interface will change */ ++ ++struct devfsd_notify_struct { /* Use native C types to ensure same types in kernel and user space */ ++ unsigned int type; /* DEVFSD_NOTIFY_* value */ ++ unsigned int mode; /* Mode of the inode or device entry */ ++ unsigned int major; /* Major number of device entry */ ++ unsigned int minor; /* Minor number of device entry */ ++ unsigned int uid; /* Uid of process, inode or device entry */ ++ unsigned int gid; /* Gid of process, inode or device entry */ ++ unsigned int overrun_count; /* Number of lost events */ ++ unsigned int namelen; /* Number of characters not including '\0' */ ++ /* The device name MUST come last */ ++ char devname[DEVFS_PATHLEN]; /* This will be '\0' terminated */ ++}; ++ ++#endif /* _LINUX_DEVFS_FS_H */ +diff -urN linux-2.6.19.old/include/linux/devfs_fs_kernel.h linux-2.6.19.dev/include/linux/devfs_fs_kernel.h +--- linux-2.6.19.old/include/linux/devfs_fs_kernel.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/devfs_fs_kernel.h 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,58 @@ ++#ifndef _LINUX_DEVFS_FS_KERNEL_H ++#define _LINUX_DEVFS_FS_KERNEL_H ++ ++#include <linux/fs.h> ++#include <linux/autoconf.h> ++#include <linux/spinlock.h> ++#include <linux/types.h> ++ ++#include <asm/semaphore.h> ++ ++#define DEVFS_SUPER_MAGIC 0x1373 ++ ++#ifdef CONFIG_DEVFS_FS ++extern int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...) ++ __attribute__ ((format(printf, 3, 4))); ++extern int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...) ++ __attribute__ ((format(printf, 3, 4))); ++extern int devfs_mk_symlink(const char *name, const char *link); ++extern int devfs_mk_dir(const char *fmt, ...) ++ __attribute__ ((format(printf, 1, 2))); ++extern void devfs_remove(const char *fmt, ...) ++ __attribute__ ((format(printf, 1, 2))); ++extern int devfs_register_tape(const char *name); ++extern void devfs_unregister_tape(int num); ++extern void mount_devfs_fs(void); ++#else /* CONFIG_DEVFS_FS */ ++static inline int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...) ++{ ++ return 0; ++} ++static inline int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...) ++{ ++ return 0; ++} ++static inline int devfs_mk_symlink(const char *name, const char *link) ++{ ++ return 0; ++} ++static inline int devfs_mk_dir(const char *fmt, ...) ++{ ++ return 0; ++} ++static inline void devfs_remove(const char *fmt, ...) ++{ ++} ++static inline int devfs_register_tape(const char *name) ++{ ++ return -1; ++} ++static inline void devfs_unregister_tape(int num) ++{ ++} ++static inline void mount_devfs_fs(void) ++{ ++ return; ++} ++#endif /* CONFIG_DEVFS_FS */ ++#endif /* _LINUX_DEVFS_FS_KERNEL_H */ +diff -urN linux-2.6.19.old/include/linux/fb.h linux-2.6.19.dev/include/linux/fb.h +--- linux-2.6.19.old/include/linux/fb.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/fb.h 2006-12-14 03:12:59.000000000 +0100 +@@ -379,6 +379,7 @@ + #include <linux/init.h> + #include <linux/device.h> + #include <linux/workqueue.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/notifier.h> + #include <linux/list.h> + #include <linux/backlight.h> +diff -urN linux-2.6.19.old/include/linux/genhd.h linux-2.6.19.dev/include/linux/genhd.h +--- linux-2.6.19.old/include/linux/genhd.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/genhd.h 2006-12-14 03:12:59.000000000 +0100 +@@ -114,6 +114,8 @@ + sector_t capacity; + + int flags; ++ char devfs_name[64]; /* devfs crap */ ++ int number; /* more of the same */ + struct device *driverfs_dev; + struct kobject kobj; + struct kobject *holder_dir; +diff -urN linux-2.6.19.old/include/linux/ide.h linux-2.6.19.dev/include/linux/ide.h +--- linux-2.6.19.old/include/linux/ide.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/ide.h 2006-12-14 03:12:59.000000000 +0100 +@@ -553,6 +553,7 @@ + struct hd_driveid *id; /* drive model identification info */ + struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ + struct ide_settings_s *settings;/* /proc/ide/ drive settings */ ++ char devfs_name[64]; /* devfs crap */ + + struct hwif_s *hwif; /* actually (ide_hwif_t *) */ + +diff -urN linux-2.6.19.old/include/linux/miscdevice.h linux-2.6.19.dev/include/linux/miscdevice.h +--- linux-2.6.19.old/include/linux/miscdevice.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/miscdevice.h 2006-12-14 03:12:59.000000000 +0100 +@@ -40,6 +40,7 @@ + struct list_head list; + struct device *dev; + struct class_device *class; ++ char devfs_name[64]; + }; + + extern int misc_register(struct miscdevice * misc); +diff -urN linux-2.6.19.old/include/linux/serial_core.h linux-2.6.19.dev/include/linux/serial_core.h +--- linux-2.6.19.old/include/linux/serial_core.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/serial_core.h 2006-12-14 03:12:59.000000000 +0100 +@@ -339,6 +339,7 @@ + struct module *owner; + const char *driver_name; + const char *dev_name; ++ const char *devfs_name; + int major; + int minor; + int nr; +diff -urN linux-2.6.19.old/include/linux/tty_driver.h linux-2.6.19.dev/include/linux/tty_driver.h +--- linux-2.6.19.old/include/linux/tty_driver.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/linux/tty_driver.h 2006-12-14 03:12:59.000000000 +0100 +@@ -157,6 +157,7 @@ + struct cdev cdev; + struct module *owner; + const char *driver_name; ++ const char *devfs_name; + const char *name; + int name_base; /* offset of printed name */ + int major; /* major device number */ +@@ -251,6 +252,8 @@ + * called. This is to be used by drivers that have tty devices + * that can appear and disappear while the main tty driver is + * registered with the tty core. ++ * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This ++ * is only used by tty_register_driver(). + * + * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead + * use dynamic memory keyed through the devpts filesystem. This +@@ -260,6 +263,7 @@ + #define TTY_DRIVER_RESET_TERMIOS 0x0002 + #define TTY_DRIVER_REAL_RAW 0x0004 + #define TTY_DRIVER_DYNAMIC_DEV 0x0008 ++#define TTY_DRIVER_NO_DEVFS 0x0008 + #define TTY_DRIVER_DEVPTS_MEM 0x0010 + + /* tty driver types */ +diff -urN linux-2.6.19.old/include/media/v4l2-dev.h linux-2.6.19.dev/include/media/v4l2-dev.h +--- linux-2.6.19.old/include/media/v4l2-dev.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/media/v4l2-dev.h 2006-12-14 03:12:59.000000000 +0100 +@@ -315,6 +315,7 @@ + /* for videodev.c intenal usage -- please don't touch */ + int users; /* video_exclusive_{open|close} ... */ + struct mutex lock; /* ... helper function uses these */ ++ char devfs_name[64]; /* devfs */ + struct class_device class_dev; /* sysfs */ + }; + +diff -urN linux-2.6.19.old/include/scsi/scsi_device.h linux-2.6.19.dev/include/scsi/scsi_device.h +--- linux-2.6.19.old/include/scsi/scsi_device.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/scsi/scsi_device.h 2006-12-14 03:12:59.000000000 +0100 +@@ -74,6 +74,7 @@ + unsigned sector_size; /* size in bytes */ + + void *hostdata; /* available to low-level driver */ ++ char devfs_name[256]; /* devfs junk */ + char type; + char scsi_level; + char inq_periph_qual; /* PQ from INQUIRY data */ +diff -urN linux-2.6.19.old/include/sound/core.h linux-2.6.19.dev/include/sound/core.h +--- linux-2.6.19.old/include/sound/core.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/include/sound/core.h 2006-12-14 03:12:59.000000000 +0100 +@@ -188,6 +188,8 @@ + const struct file_operations *f_ops; /* file operations */ + void *private_data; /* private data for f_ops->open */ + struct class_device *class_dev; /* class device for sysfs */ ++ char name[0]; /* device name for devfs (keep ++ at the end of structure) */ + }; + + /* sound.c */ +diff -urN linux-2.6.19.old/init/do_mounts.c linux-2.6.19.dev/init/do_mounts.c +--- linux-2.6.19.old/init/do_mounts.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/do_mounts.c 2006-12-14 03:12:59.000000000 +0100 +@@ -335,7 +335,7 @@ + { + void *data = nfs_root_data(); + +- create_dev("/dev/root", ROOT_DEV); ++ create_dev("/dev/root", ROOT_DEV, root_device_name); + if (data && + do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) + return 1; +@@ -397,7 +397,7 @@ + } + #endif + #ifdef CONFIG_BLOCK +- create_dev("/dev/root", ROOT_DEV); ++ create_dev("/dev/root", ROOT_DEV, root_device_name); + mount_block_root("/dev/root", root_mountflags); + #endif + } +@@ -409,6 +409,8 @@ + { + int is_floppy; + ++ mount_devfs(); ++ + if (root_delay) { + printk(KERN_INFO "Waiting %dsec before mounting root device...\n", + root_delay); +@@ -442,8 +444,10 @@ + + mount_root(); + out: ++ umount_devfs("/dev"); + sys_mount(".", "/", NULL, MS_MOVE, NULL); + sys_chroot("."); + security_sb_post_mountroot(); ++ mount_devfs_fs (); + } + +diff -urN linux-2.6.19.old/init/do_mounts_devfs.c linux-2.6.19.dev/init/do_mounts_devfs.c +--- linux-2.6.19.old/init/do_mounts_devfs.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.19.dev/init/do_mounts_devfs.c 2006-12-14 03:12:59.000000000 +0100 +@@ -0,0 +1,137 @@ ++ ++#include <linux/kernel.h> ++#include <linux/dirent.h> ++#include <linux/string.h> ++ ++#include "do_mounts.h" ++ ++void __init mount_devfs(void) ++{ ++ sys_mount("devfs", "/dev", "devfs", 0, NULL); ++} ++ ++void __init umount_devfs(char *path) ++{ ++ sys_umount(path, 0); ++} ++ ++/* ++ * If the dir will fit in *buf, return its length. If it won't fit, return ++ * zero. Return -ve on error. ++ */ ++static int __init do_read_dir(int fd, void *buf, int len) ++{ ++ long bytes, n; ++ char *p = buf; ++ sys_lseek(fd, 0, 0); ++ ++ for (bytes = 0; bytes < len; bytes += n) { ++ n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes), ++ len - bytes); ++ if (n < 0) ++ return n; ++ if (n == 0) ++ return bytes; ++ } ++ return 0; ++} ++ ++/* ++ * Try to read all of a directory. Returns the contents at *p, which ++ * is kmalloced memory. Returns the number of bytes read at *len. Returns ++ * NULL on error. ++ */ ++static void * __init read_dir(char *path, int *len) ++{ ++ int size; ++ int fd = sys_open(path, 0, 0); ++ ++ *len = 0; ++ if (fd < 0) ++ return NULL; ++ ++ for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) { ++ void *p = kmalloc(size, GFP_KERNEL); ++ int n; ++ if (!p) ++ break; ++ n = do_read_dir(fd, p, size); ++ if (n > 0) { ++ sys_close(fd); ++ *len = n; ++ return p; ++ } ++ kfree(p); ++ if (n == -EINVAL) ++ continue; /* Try a larger buffer */ ++ if (n < 0) ++ break; ++ } ++ sys_close(fd); ++ return NULL; ++} ++ ++/* ++ * recursively scan <path>, looking for a device node of type <dev> ++ */ ++static int __init find_in_devfs(char *path, unsigned dev) ++{ ++ char *end = path + strlen(path); ++ int rest = path + 64 - end; ++ int size; ++ char *p = read_dir(path, &size); ++ char *s; ++ ++ if (!p) ++ return -1; ++ for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) { ++ struct linux_dirent64 *d = (struct linux_dirent64 *)s; ++ if (strlen(d->d_name) + 2 > rest) ++ continue; ++ switch (d->d_type) { ++ case DT_BLK: ++ sprintf(end, "/%s", d->d_name); ++ if (bstat(path) != dev) ++ break; ++ kfree(p); ++ return 0; ++ case DT_DIR: ++ if (strcmp(d->d_name, ".") == 0) ++ break; ++ if (strcmp(d->d_name, "..") == 0) ++ break; ++ sprintf(end, "/%s", d->d_name); ++ if (find_in_devfs(path, dev) < 0) ++ break; ++ kfree(p); ++ return 0; ++ } ++ } ++ kfree(p); ++ return -1; ++} ++ ++/* ++ * create a device node called <name> which points to ++ * <devfs_name> if possible, otherwise find a device node ++ * which matches <dev> and make <name> a symlink pointing to it. ++ */ ++int __init create_dev(char *name, dev_t dev, char *devfs_name) ++{ ++ char path[64]; ++ ++ sys_unlink(name); ++ if (devfs_name && devfs_name[0]) { ++ if (strncmp(devfs_name, "/dev/", 5) == 0) ++ devfs_name += 5; ++ sprintf(path, "/dev/%s", devfs_name); ++ if (sys_access(path, 0) == 0) ++ return sys_symlink(devfs_name, name); ++ } ++ if (!dev) ++ return -1; ++ strcpy(path, "/dev"); ++ if (find_in_devfs(path, new_encode_dev(dev)) < 0) ++ return -1; ++ return sys_symlink(path + 5, name); ++} +diff -urN linux-2.6.19.old/init/do_mounts.h linux-2.6.19.dev/init/do_mounts.h +--- linux-2.6.19.old/init/do_mounts.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/do_mounts.h 2006-12-14 03:12:59.000000000 +0100 +@@ -6,6 +6,7 @@ + #include <linux/mount.h> + #include <linux/major.h> + #include <linux/root_dev.h> ++#include <linux/devfs_fs_kernel.h> + + void change_floppy(char *fmt, ...); + void mount_block_root(char *name, int flags); +@@ -13,12 +14,25 @@ + extern int root_mountflags; + extern char *root_device_name; + +-static inline int create_dev(char *name, dev_t dev) ++#ifdef CONFIG_DEVFS_FS ++ ++void mount_devfs(void); ++void umount_devfs(char *path); ++int create_dev(char *name, dev_t dev, char *devfs_name); ++ ++#else ++ ++static inline void mount_devfs(void) {} ++static inline void umount_devfs(const char *path) {} ++ ++static inline int create_dev(char *name, dev_t dev, char *devfs_name) + { + sys_unlink(name); + return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev)); + } + ++#endif ++ + #if BITS_PER_LONG == 32 + static inline u32 bstat(char *name) + { +diff -urN linux-2.6.19.old/init/do_mounts_initrd.c linux-2.6.19.dev/init/do_mounts_initrd.c +--- linux-2.6.19.old/init/do_mounts_initrd.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/do_mounts_initrd.c 2006-12-14 03:12:59.000000000 +0100 +@@ -43,7 +43,7 @@ + int pid; + + real_root_dev = new_encode_dev(ROOT_DEV); +- create_dev("/dev/root.old", Root_RAM0); ++ create_dev("/dev/root.old", Root_RAM0, NULL); + /* mount initrd on rootfs' /root */ + mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY); + sys_mkdir("/old", 0700); +@@ -53,6 +53,7 @@ + sys_chdir("/root"); + sys_mount(".", "/", NULL, MS_MOVE, NULL); + sys_chroot("."); ++ mount_devfs_fs (); + + current->flags |= PF_NOFREEZE; + pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD); +@@ -69,6 +70,7 @@ + sys_chroot("."); + sys_close(old_fd); + sys_close(root_fd); ++ umount_devfs("/old/dev"); + + if (new_decode_dev(real_root_dev) == Root_RAM0) { + sys_chdir("/old"); +@@ -104,7 +106,7 @@ + int __init initrd_load(void) + { + if (mount_initrd) { +- create_dev("/dev/ram", Root_RAM0); ++ create_dev("/dev/ram", Root_RAM0, NULL); + /* + * Load the initrd data into /dev/ram0. Execute it as initrd + * unless /dev/ram0 is supposed to be our actual root device, +diff -urN linux-2.6.19.old/init/do_mounts_md.c linux-2.6.19.dev/init/do_mounts_md.c +--- linux-2.6.19.old/init/do_mounts_md.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/do_mounts_md.c 2006-12-14 03:12:59.000000000 +0100 +@@ -121,18 +121,19 @@ + int err = 0; + char *devname; + mdu_disk_info_t dinfo; +- char name[16]; ++ char name[16], devfs_name[16]; + + minor = md_setup_args[ent].minor; + partitioned = md_setup_args[ent].partitioned; + devname = md_setup_args[ent].device_names; + + sprintf(name, "/dev/md%s%d", partitioned?"_d":"", minor); ++ sprintf(devfs_name, "/dev/md/%s%d", partitioned?"d":"", minor); + if (partitioned) + dev = MKDEV(mdp_major, minor << MdpMinorShift); + else + dev = MKDEV(MD_MAJOR, minor); +- create_dev(name, dev); ++ create_dev(name, dev, devfs_name); + for (i = 0; i < MD_SB_DISKS && devname != 0; i++) { + char *p; + char comp_name[64]; +@@ -267,7 +268,7 @@ + + void __init md_run_setup(void) + { +- create_dev("/dev/md0", MKDEV(MD_MAJOR, 0)); ++ create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0"); + if (raid_noautodetect) + printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n"); + else { +diff -urN linux-2.6.19.old/init/main.c linux-2.6.19.dev/init/main.c +--- linux-2.6.19.old/init/main.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/main.c 2006-12-14 03:12:59.000000000 +0100 +@@ -12,6 +12,7 @@ + #include <linux/types.h> + #include <linux/module.h> + #include <linux/proc_fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/kernel.h> + #include <linux/syscalls.h> + #include <linux/string.h> +diff -urN linux-2.6.19.old/init/Makefile linux-2.6.19.dev/init/Makefile +--- linux-2.6.19.old/init/Makefile 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/init/Makefile 2006-12-14 03:12:59.000000000 +0100 +@@ -6,6 +6,7 @@ + obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o + + mounts-y := do_mounts.o ++mounts-$(CONFIG_DEVFS_FS) += do_mounts_devfs.o + mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o + mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o + mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o +diff -urN linux-2.6.19.old/mm/shmem.c linux-2.6.19.dev/mm/shmem.c +--- linux-2.6.19.old/mm/shmem.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/mm/shmem.c 2006-12-14 03:12:59.000000000 +0100 +@@ -25,6 +25,7 @@ + + #include <linux/module.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/fs.h> + #include <linux/xattr.h> + #include <linux/generic_acl.h> +@@ -2427,6 +2428,9 @@ + goto out2; + } + ++#ifdef CONFIG_TMPFS ++ devfs_mk_dir("shm"); ++#endif + shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER, + tmpfs_fs_type.name, NULL); + if (IS_ERR(shm_mnt)) { +diff -urN linux-2.6.19.old/mm/tiny-shmem.c linux-2.6.19.dev/mm/tiny-shmem.c +--- linux-2.6.19.old/mm/tiny-shmem.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/mm/tiny-shmem.c 2006-12-14 03:12:59.000000000 +0100 +@@ -12,6 +12,7 @@ + + #include <linux/fs.h> + #include <linux/init.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/vfs.h> + #include <linux/mount.h> + #include <linux/file.h> +@@ -32,6 +33,9 @@ + { + BUG_ON(register_filesystem(&tmpfs_fs_type) != 0); + ++#ifdef CONFIG_TMPFS ++ devfs_mk_dir("shm"); ++#endif + shm_mnt = kern_mount(&tmpfs_fs_type); + BUG_ON(IS_ERR(shm_mnt)); + +diff -urN linux-2.6.19.old/net/bluetooth/rfcomm/tty.c linux-2.6.19.dev/net/bluetooth/rfcomm/tty.c +--- linux-2.6.19.old/net/bluetooth/rfcomm/tty.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/net/bluetooth/rfcomm/tty.c 2006-12-14 03:12:59.000000000 +0100 +@@ -1039,12 +1039,13 @@ + + rfcomm_tty_driver->owner = THIS_MODULE; + rfcomm_tty_driver->driver_name = "rfcomm"; ++ rfcomm_tty_driver->devfs_name = "bluetooth/rfcomm/"; + rfcomm_tty_driver->name = "rfcomm"; + rfcomm_tty_driver->major = RFCOMM_TTY_MAJOR; + rfcomm_tty_driver->minor_start = RFCOMM_TTY_MINOR; + rfcomm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + rfcomm_tty_driver->subtype = SERIAL_TYPE_NORMAL; +- rfcomm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ rfcomm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + rfcomm_tty_driver->init_termios = tty_std_termios; + rfcomm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(rfcomm_tty_driver, &rfcomm_ops); +diff -urN linux-2.6.19.old/net/irda/ircomm/ircomm_tty.c linux-2.6.19.dev/net/irda/ircomm/ircomm_tty.c +--- linux-2.6.19.old/net/irda/ircomm/ircomm_tty.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/net/irda/ircomm/ircomm_tty.c 2006-12-14 03:12:59.000000000 +0100 +@@ -123,6 +123,7 @@ + driver->owner = THIS_MODULE; + driver->driver_name = "ircomm"; + driver->name = "ircomm"; ++ driver->devfs_name = "ircomm"; + driver->major = IRCOMM_TTY_MAJOR; + driver->minor_start = IRCOMM_TTY_MINOR; + driver->type = TTY_DRIVER_TYPE_SERIAL; +diff -urN linux-2.6.19.old/net/irda/irnet/irnet.h linux-2.6.19.dev/net/irda/irnet/irnet.h +--- linux-2.6.19.old/net/irda/irnet/irnet.h 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/net/irda/irnet/irnet.h 2006-12-14 03:12:59.000000000 +0100 +@@ -244,6 +244,7 @@ + #include <linux/skbuff.h> + #include <linux/tty.h> + #include <linux/proc_fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/netdevice.h> + #include <linux/miscdevice.h> + #include <linux/poll.h> +diff -urN linux-2.6.19.old/sound/core/info.c linux-2.6.19.dev/sound/core/info.c +--- linux-2.6.19.old/sound/core/info.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/sound/core/info.c 2006-12-14 03:12:59.000000000 +0100 +@@ -29,6 +29,7 @@ + #include <sound/info.h> + #include <sound/version.h> + #include <linux/proc_fs.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/mutex.h> + #include <stdarg.h> + +diff -urN linux-2.6.19.old/sound/core/sound.c linux-2.6.19.dev/sound/core/sound.c +--- linux-2.6.19.old/sound/core/sound.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/sound/core/sound.c 2006-12-14 03:12:59.000000000 +0100 +@@ -32,6 +32,7 @@ + #include <sound/control.h> + #include <sound/initval.h> + #include <linux/kmod.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/mutex.h> + + #define SNDRV_OS_MINORS 256 +@@ -41,6 +42,7 @@ + EXPORT_SYMBOL(snd_major); + + static int cards_limit = 1; ++static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO; + + MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); + MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards."); +@@ -49,6 +51,10 @@ + MODULE_PARM_DESC(major, "Major # for sound driver."); + module_param(cards_limit, int, 0444); + MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards."); ++#ifdef CONFIG_DEVFS_FS ++module_param(device_mode, int, 0444); ++MODULE_PARM_DESC(device_mode, "Device file permission mask for devfs."); ++#endif + MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR); + + /* this one holds the actual max. card number currently available. +@@ -244,7 +250,7 @@ + struct device *device = NULL; + + snd_assert(name, return -EINVAL); +- preg = kmalloc(sizeof *preg, GFP_KERNEL); ++ preg = kmalloc((sizeof *preg) + strlen(name) + 1, GFP_KERNEL); + if (preg == NULL) + return -ENOMEM; + preg->type = type; +@@ -252,6 +258,7 @@ + preg->device = dev; + preg->f_ops = f_ops; + preg->private_data = private_data; ++ strcpy(preg->name, name); /* for devfs */ + mutex_lock(&sound_mutex); + #ifdef CONFIG_SND_DYNAMIC_MINORS + minor = snd_find_free_minor(); +@@ -266,6 +273,8 @@ + return minor; + } + snd_minors[minor] = preg; ++ if (type != SNDRV_DEVICE_TYPE_CONTROL || preg->card >= cards_limit) ++ devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name); + if (card) + device = card->dev; + preg->class_dev = class_device_create(sound_class, NULL, +@@ -320,6 +329,9 @@ + return -EINVAL; + } + ++ if (snd_minors[minor]->type != SNDRV_DEVICE_TYPE_CONTROL || ++ snd_minors[minor]->card >= cards_limit) /* created in sound.c */ ++ devfs_remove("snd/%s", snd_minors[minor]->name); + class_device_destroy(sound_class, MKDEV(major, minor)); + + kfree(snd_minors[minor]); +@@ -430,17 +442,24 @@ + + static int __init alsa_sound_init(void) + { ++ short controlnum; ++ + snd_major = major; + snd_ecards_limit = cards_limit; ++ devfs_mk_dir("snd"); + if (register_chrdev(major, "alsa", &snd_fops)) { + snd_printk(KERN_ERR "unable to register native major device number %d\n", major); ++ devfs_remove("snd"); + return -EIO; + } + if (snd_info_init() < 0) { + unregister_chrdev(major, "alsa"); ++ devfs_remove("snd"); + return -ENOMEM; + } + snd_info_minor_register(); ++ for (controlnum = 0; controlnum < cards_limit; controlnum++) ++ devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum); + #ifndef MODULE + printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n"); + #endif +@@ -449,10 +468,16 @@ + + static void __exit alsa_sound_exit(void) + { ++ short controlnum; ++ ++ for (controlnum = 0; controlnum < cards_limit; controlnum++) ++ devfs_remove("snd/controlC%d", controlnum); ++ + snd_info_minor_unregister(); + snd_info_done(); + if (unregister_chrdev(major, "alsa") != 0) + snd_printk(KERN_ERR "unable to unregister major device number %d\n", major); ++ devfs_remove("snd"); + } + + module_init(alsa_sound_init) +diff -urN linux-2.6.19.old/sound/oss/soundcard.c linux-2.6.19.dev/sound/oss/soundcard.c +--- linux-2.6.19.old/sound/oss/soundcard.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/sound/oss/soundcard.c 2006-12-14 03:12:59.000000000 +0100 +@@ -37,6 +37,7 @@ + #include <linux/wait.h> + #include <linux/slab.h> + #include <linux/ioport.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/major.h> + #include <linux/delay.h> + #include <linux/proc_fs.h> +@@ -557,6 +558,9 @@ + sound_dmap_flag = (dmabuf > 0 ? 1 : 0); + + for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) { ++ devfs_mk_cdev(MKDEV(SOUND_MAJOR, dev_list[i].minor), ++ S_IFCHR | dev_list[i].mode, ++ "sound/%s", dev_list[i].name); + class_device_create(sound_class, NULL, + MKDEV(SOUND_MAJOR, dev_list[i].minor), + NULL, "%s", dev_list[i].name); +@@ -564,10 +568,15 @@ + if (!dev_list[i].num) + continue; + +- for (j = 1; j < *dev_list[i].num; j++) ++ for (j = 1; j < *dev_list[i].num; j++) { ++ devfs_mk_cdev(MKDEV(SOUND_MAJOR, ++ dev_list[i].minor + (j*0x10)), ++ S_IFCHR | dev_list[i].mode, ++ "sound/%s%d", dev_list[i].name, j); + class_device_create(sound_class, NULL, + MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)), + NULL, "%s%d", dev_list[i].name, j); ++ } + } + + if (sound_nblocks >= 1024) +@@ -581,11 +590,14 @@ + int i, j; + + for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) { ++ devfs_remove("sound/%s", dev_list[i].name); + class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor)); + if (!dev_list[i].num) + continue; +- for (j = 1; j < *dev_list[i].num; j++) ++ for (j = 1; j < *dev_list[i].num; j++) { ++ devfs_remove("sound/%s%d", dev_list[i].name, j); + class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10))); ++ } + } + + unregister_sound_special(1); +diff -urN linux-2.6.19.old/sound/sound_core.c linux-2.6.19.dev/sound/sound_core.c +--- linux-2.6.19.old/sound/sound_core.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux-2.6.19.dev/sound/sound_core.c 2006-12-14 03:12:59.000000000 +0100 +@@ -43,6 +43,7 @@ + #include <linux/sound.h> + #include <linux/major.h> + #include <linux/kmod.h> ++#include <linux/devfs_fs_kernel.h> + #include <linux/device.h> + + #define SOUND_STEP 16 +@@ -170,6 +171,8 @@ + else + sprintf(s->name, "sound/%s%d", name, r / SOUND_STEP); + ++ devfs_mk_cdev(MKDEV(SOUND_MAJOR, s->unit_minor), ++ S_IFCHR | mode, s->name); + class_device_create(sound_class, NULL, MKDEV(SOUND_MAJOR, s->unit_minor), + dev, s->name+6); + return r; +@@ -193,6 +196,7 @@ + p = __sound_remove_unit(list, unit); + spin_unlock(&sound_loader_lock); + if (p) { ++ devfs_remove(p->name); + class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, p->unit_minor)); + kfree(p); + } +@@ -527,6 +531,7 @@ + /* We have nothing to really do here - we know the lists must be + empty */ + unregister_chrdev(SOUND_MAJOR, "sound"); ++ devfs_remove("sound"); + class_destroy(sound_class); + } + +@@ -536,6 +541,7 @@ + printk(KERN_ERR "soundcore: sound device already in use.\n"); + return -EBUSY; + } ++ devfs_mk_dir ("sound"); + sound_class = class_create(THIS_MODULE, "sound"); + if (IS_ERR(sound_class)) + return PTR_ERR(sound_class); |