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author | cl349@firebug.cl.cam.ac.uk <cl349@firebug.cl.cam.ac.uk> | 2005-03-09 00:37:56 +0000 |
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committer | cl349@firebug.cl.cam.ac.uk <cl349@firebug.cl.cam.ac.uk> | 2005-03-09 00:37:56 +0000 |
commit | 97f5afbcf56c646f2f9ff951fedf88ae4ed3ac4f (patch) | |
tree | 2386ce04a06374fc9f59972881223566b01cb8e3 /netbsd-2.0-xen-sparse | |
parent | 9fd655b0297bbcc9c8a5908a57d1b8f14a6a0f1a (diff) | |
download | xen-97f5afbcf56c646f2f9ff951fedf88ae4ed3ac4f.tar.gz xen-97f5afbcf56c646f2f9ff951fedf88ae4ed3ac4f.tar.bz2 xen-97f5afbcf56c646f2f9ff951fedf88ae4ed3ac4f.zip |
bitkeeper revision 1.1159.258.31 (422e4564B542sr1LgKTQ3FWQwTZcZQ)
Add support for read file operation handlers.
Also fix fallback to default handlers.
Signed-off-by: Christian Limpach <cl@NetBSD.org>
Diffstat (limited to 'netbsd-2.0-xen-sparse')
-rw-r--r-- | netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs.h | 205 | ||||
-rw-r--r-- | netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs_vnops.c | 1583 |
2 files changed, 1788 insertions, 0 deletions
diff --git a/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs.h b/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs.h new file mode 100644 index 0000000000..fbd416b983 --- /dev/null +++ b/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs.h @@ -0,0 +1,205 @@ +/* $NetBSD: kernfs.h,v 1.20.2.3 2004/05/23 10:46:05 tron Exp $ */ + +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software donated to Berkeley by + * Jan-Simon Pendry. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)kernfs.h 8.6 (Berkeley) 3/29/95 + */ + +#define _PATH_KERNFS "/kern" /* Default mountpoint */ + +#ifdef _KERNEL +#include <sys/queue.h> + +/* + * The different types of node in a kernfs filesystem + */ +typedef enum { + KFSkern, /* the filesystem itself (.) */ + KFSroot, /* the filesystem root (..) */ + KFSnull, /* none aplicable */ + KFStime, /* boottime */ + KFSint, /* integer */ + KFSstring, /* string */ + KFShostname, /* hostname */ + KFSavenrun, /* loadavg */ + KFSdevice, /* device file (rootdev/rrootdev) */ + KFSmsgbuf, /* msgbuf */ + KFSipsecsadir, /* ipsec security association (top dir) */ + KFSipsecspdir, /* ipsec security policy (top dir) */ + KFSipsecsa, /* ipsec security association entry */ + KFSipsecsp, /* ipsec security policy entry */ + KFSsubdir, /* directory */ + KFSlasttype, /* last used type */ + KFSmaxtype = (1<<6) - 1 /* last possible type */ +} kfstype; + +/* + * Control data for the kern file system. + */ +struct kern_target { + u_char kt_type; + u_char kt_namlen; + const char *kt_name; + void *kt_data; + kfstype kt_tag; + u_char kt_vtype; + mode_t kt_mode; +}; + +struct dyn_kern_target { + struct kern_target dkt_kt; + SIMPLEQ_ENTRY(dyn_kern_target) dkt_queue; +}; + +struct kernfs_subdir { + SIMPLEQ_HEAD(,dyn_kern_target) ks_entries; + unsigned int ks_nentries; + unsigned int ks_dirs; + const struct kern_target *ks_parent; +}; + +struct kernfs_node { + LIST_ENTRY(kernfs_node) kfs_hash; /* hash chain */ + TAILQ_ENTRY(kernfs_node) kfs_list; /* flat list */ + struct vnode *kfs_vnode; /* vnode associated with this pfsnode */ + kfstype kfs_type; /* type of procfs node */ + mode_t kfs_mode; /* mode bits for stat() */ + long kfs_fileno; /* unique file id */ + u_int32_t kfs_value; /* SA id or SP id (KFSint) */ + const struct kern_target *kfs_kt; + void *kfs_v; /* pointer to secasvar/secpolicy/mbuf */ + long kfs_cookie; /* fileno cookie */ +}; + +struct kernfs_mount { + TAILQ_HEAD(, kernfs_node) nodelist; + long fileno_cookie; +}; + +#define UIO_MX 32 + +#define KERNFS_FILENO(kt, typ, cookie) \ + ((kt >= &kern_targets[0] && kt < &kern_targets[static_nkern_targets]) \ + ? 2 + ((kt) - &kern_targets[0]) \ + : (((cookie + 1) << 6) | (typ))) +#define KERNFS_TYPE_FILENO(typ, cookie) \ + (((cookie + 1) << 6) | (typ)) + +#define VFSTOKERNFS(mp) ((struct kernfs_mount *)((mp)->mnt_data)) +#define VTOKERN(vp) ((struct kernfs_node *)(vp)->v_data) +#define KERNFSTOV(kfs) ((kfs)->kfs_vnode) + +extern const struct kern_target kern_targets[]; +extern int nkern_targets; +extern const int static_nkern_targets; +extern int (**kernfs_vnodeop_p) __P((void *)); +extern struct vfsops kernfs_vfsops; +extern dev_t rrootdev; + +struct secasvar; +struct secpolicy; + +int kernfs_root __P((struct mount *, struct vnode **)); + +void kernfs_hashinit __P((void)); +void kernfs_hashreinit __P((void)); +void kernfs_hashdone __P((void)); +int kernfs_freevp __P((struct vnode *)); +int kernfs_allocvp __P((struct mount *, struct vnode **, kfstype, + const struct kern_target *, u_int32_t)); + +void kernfs_revoke_sa __P((struct secasvar *)); +void kernfs_revoke_sp __P((struct secpolicy *)); + +/* + * Data types for the kernfs file operations. + */ +typedef enum { + KERNFS_XREAD, + KERNFS_XWRITE, + KERNFS_FILEOP_CLOSE, + KERNFS_FILEOP_GETATTR, + KERNFS_FILEOP_IOCTL, + KERNFS_FILEOP_MMAP, + KERNFS_FILEOP_OPEN, + KERNFS_FILEOP_READ, + KERNFS_FILEOP_WRITE, +} kfsfileop; + +struct kernfs_fileop { + kfstype kf_type; + kfsfileop kf_fileop; + union { + void *_kf_genop; + int (*_kf_vop)(void *); + int (*_kf_xread) + (const struct kernfs_node *, int, char **, size_t, + size_t *); + int (*_kf_xwrite) + (const struct kernfs_node *, char *, size_t); + } _kf_opfn; + SPLAY_ENTRY(kernfs_fileop) kf_node; +}; +#define kf_genop _kf_opfn +#define kf_vop _kf_opfn._kf_vop +#define kf_xwrite _kf_opfn._kf_xwrite +#define kf_xread _kf_opfn._kf_xread + +typedef struct kern_target kernfs_parentdir_t; +typedef struct dyn_kern_target kernfs_entry_t; + +/* + * Functions for adding kernfs datatypes and nodes. + */ +kfstype kernfs_alloctype(int, const struct kernfs_fileop *); +#define KERNFS_ALLOCTYPE(kf) kernfs_alloctype(sizeof((kf)) / \ + sizeof((kf)[0]), (kf)) +#define KERNFS_ALLOCENTRY(dkt, m_type, m_flags) \ + dkt = (struct dyn_kern_target *)malloc( \ + sizeof(struct dyn_kern_target), (m_type), (m_flags)) +#define KERNFS_INITENTRY(dkt, type, name, data, tag, vtype, mode) do { \ + (dkt)->dkt_kt.kt_type = (type); \ + (dkt)->dkt_kt.kt_namlen = strlen((name)); \ + (dkt)->dkt_kt.kt_name = (name); \ + (dkt)->dkt_kt.kt_data = (data); \ + (dkt)->dkt_kt.kt_tag = (tag); \ + (dkt)->dkt_kt.kt_vtype = (vtype); \ + (dkt)->dkt_kt.kt_mode = (mode); \ +} while (/*CONSTCOND*/0) +#define KERNFS_ENTOPARENTDIR(dkt) &(dkt)->dkt_kt +int kernfs_addentry __P((kernfs_parentdir_t *, kernfs_entry_t *)); + +#ifdef SYSCTL_SETUP_PROTO +SYSCTL_SETUP_PROTO(sysctl_vfs_kernfs_setup); +#endif /* SYSCTL_SETUP_PROTO */ + +#endif /* _KERNEL */ diff --git a/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs_vnops.c b/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs_vnops.c new file mode 100644 index 0000000000..4ed109ece7 --- /dev/null +++ b/netbsd-2.0-xen-sparse/sys/miscfs/kernfs/kernfs_vnops.c @@ -0,0 +1,1583 @@ +/* $NetBSD: kernfs_vnops.c,v 1.98.2.3 2004/05/15 13:35:27 tron Exp $ */ + +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software donated to Berkeley by + * Jan-Simon Pendry. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95 + */ + +/* + * Kernel parameter filesystem (/kern) + */ + +#include <sys/cdefs.h> +__KERNEL_RCSID(0, "$NetBSD: kernfs_vnops.c,v 1.98.2.3 2004/05/15 13:35:27 tron Exp $"); + +#ifdef _KERNEL_OPT +#include "opt_ipsec.h" +#endif + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/vmmeter.h> +#include <sys/time.h> +#include <sys/proc.h> +#include <sys/vnode.h> +#include <sys/malloc.h> +#include <sys/file.h> +#include <sys/stat.h> +#include <sys/mount.h> +#include <sys/namei.h> +#include <sys/buf.h> +#include <sys/dirent.h> +#include <sys/msgbuf.h> + +#include <miscfs/genfs/genfs.h> +#include <miscfs/kernfs/kernfs.h> + +#ifdef IPSEC +#include <sys/mbuf.h> +#include <net/route.h> +#include <netinet/in.h> +#include <netinet6/ipsec.h> +#include <netkey/key.h> +#endif + +#include <uvm/uvm_extern.h> + +#define KSTRING 256 /* Largest I/O available via this filesystem */ +#define UIO_MX 32 + +#define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) +#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) +#define UREAD_MODE (S_IRUSR) +#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) +#define UDIR_MODE (S_IRUSR|S_IXUSR) + +#define N(s) sizeof(s)-1, s +const struct kern_target kern_targets[] = { +/* NOTE: The name must be less than UIO_MX-16 chars in length */ + /* name data tag type ro/rw */ + { DT_DIR, N("."), 0, KFSkern, VDIR, DIR_MODE }, + { DT_DIR, N(".."), 0, KFSroot, VDIR, DIR_MODE }, + { DT_REG, N("boottime"), &boottime.tv_sec, KFSint, VREG, READ_MODE }, + /* XXX cast away const */ + { DT_REG, N("copyright"), (void *)copyright, + KFSstring, VREG, READ_MODE }, + { DT_REG, N("hostname"), 0, KFShostname, VREG, WRITE_MODE }, + { DT_REG, N("hz"), &hz, KFSint, VREG, READ_MODE }, +#ifdef IPSEC + { DT_DIR, N("ipsecsa"), 0, KFSipsecsadir, VDIR, UDIR_MODE }, + { DT_DIR, N("ipsecsp"), 0, KFSipsecspdir, VDIR, UDIR_MODE }, +#endif + { DT_REG, N("loadavg"), 0, KFSavenrun, VREG, READ_MODE }, + { DT_REG, N("msgbuf"), 0, KFSmsgbuf, VREG, READ_MODE }, + { DT_REG, N("pagesize"), &uvmexp.pagesize, KFSint, VREG, READ_MODE }, + { DT_REG, N("physmem"), &physmem, KFSint, VREG, READ_MODE }, +#if 0 + { DT_DIR, N("root"), 0, KFSnull, VDIR, DIR_MODE }, +#endif + { DT_BLK, N("rootdev"), &rootdev, KFSdevice, VBLK, READ_MODE }, + { DT_CHR, N("rrootdev"), &rrootdev, KFSdevice, VCHR, READ_MODE }, + { DT_REG, N("time"), 0, KFStime, VREG, READ_MODE }, + /* XXX cast away const */ + { DT_REG, N("version"), (void *)version, + KFSstring, VREG, READ_MODE }, +}; +const struct kern_target subdir_targets[] = { +/* NOTE: The name must be less than UIO_MX-16 chars in length */ + /* name data tag type ro/rw */ + { DT_DIR, N("."), 0, KFSsubdir, VDIR, DIR_MODE }, + { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, +}; +#ifdef IPSEC +const struct kern_target ipsecsa_targets[] = { +/* NOTE: The name must be less than UIO_MX-16 chars in length */ + /* name data tag type ro/rw */ + { DT_DIR, N("."), 0, KFSipsecsadir, VDIR, DIR_MODE }, + { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, +}; +const struct kern_target ipsecsp_targets[] = { +/* NOTE: The name must be less than UIO_MX-16 chars in length */ + /* name data tag type ro/rw */ + { DT_DIR, N("."), 0, KFSipsecspdir, VDIR, DIR_MODE }, + { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, +}; +const struct kern_target ipsecsa_kt = + { DT_DIR, N(""), 0, KFSipsecsa, VREG, UREAD_MODE }; +const struct kern_target ipsecsp_kt = + { DT_DIR, N(""), 0, KFSipsecsp, VREG, UREAD_MODE }; +#endif +#undef N +SIMPLEQ_HEAD(,dyn_kern_target) dyn_kern_targets = + SIMPLEQ_HEAD_INITIALIZER(dyn_kern_targets); +int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); +const int static_nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); +#ifdef IPSEC +int nipsecsa_targets = sizeof(ipsecsa_targets) / sizeof(ipsecsa_targets[0]); +int nipsecsp_targets = sizeof(ipsecsp_targets) / sizeof(ipsecsp_targets[0]); +int nkern_dirs = 4; /* 2 extra subdirs */ +#else +int nkern_dirs = 2; +#endif + +int kernfs_try_fileop(kfstype, kfsfileop, void *, int); +int kernfs_try_xread(kfstype, const struct kernfs_node *, int, char **, + size_t, size_t *, int); +int kernfs_try_xwrite(kfstype, const struct kernfs_node *, char *, + size_t, int); + +static int kernfs_default_xread(void *v); +static int kernfs_default_xwrite(void *v); +static int kernfs_default_fileop_getattr(void *); + +/* must include all fileop's */ +const struct kernfs_fileop kernfs_default_fileops[] = { + { .kf_fileop = KERNFS_XREAD }, + { .kf_fileop = KERNFS_XWRITE }, + { .kf_fileop = KERNFS_FILEOP_OPEN }, + { .kf_fileop = KERNFS_FILEOP_GETATTR, + .kf_genop = {kernfs_default_fileop_getattr} }, + { .kf_fileop = KERNFS_FILEOP_IOCTL }, + { .kf_fileop = KERNFS_FILEOP_MMAP }, + { .kf_fileop = KERNFS_FILEOP_CLOSE }, + { .kf_fileop = KERNFS_FILEOP_READ, .kf_genop = {kernfs_default_xread} }, + { .kf_fileop = KERNFS_FILEOP_WRITE, .kf_genop = {kernfs_default_xwrite} }, +}; + +int kernfs_lookup __P((void *)); +#define kernfs_create genfs_eopnotsupp +#define kernfs_mknod genfs_eopnotsupp +int kernfs_open __P((void *)); +int kernfs_close __P((void *)); +int kernfs_access __P((void *)); +int kernfs_getattr __P((void *)); +int kernfs_setattr __P((void *)); +int kernfs_read __P((void *)); +int kernfs_write __P((void *)); +#define kernfs_fcntl genfs_fcntl +int kernfs_ioctl __P((void *)); +#define kernfs_poll genfs_poll +#define kernfs_revoke genfs_revoke +int kernfs_mmap __P((void *)); +#define kernfs_fsync genfs_nullop +#define kernfs_seek genfs_nullop +#define kernfs_remove genfs_eopnotsupp +int kernfs_link __P((void *)); +#define kernfs_rename genfs_eopnotsupp +#define kernfs_mkdir genfs_eopnotsupp +#define kernfs_rmdir genfs_eopnotsupp +int kernfs_symlink __P((void *)); +int kernfs_readdir __P((void *)); +#define kernfs_readlink genfs_eopnotsupp +#define kernfs_abortop genfs_abortop +int kernfs_inactive __P((void *)); +int kernfs_reclaim __P((void *)); +#define kernfs_lock genfs_lock +#define kernfs_unlock genfs_unlock +#define kernfs_bmap genfs_badop +#define kernfs_strategy genfs_badop +int kernfs_print __P((void *)); +#define kernfs_islocked genfs_islocked +int kernfs_pathconf __P((void *)); +#define kernfs_advlock genfs_einval +#define kernfs_blkatoff genfs_eopnotsupp +#define kernfs_valloc genfs_eopnotsupp +#define kernfs_vfree genfs_nullop +#define kernfs_truncate genfs_eopnotsupp +#define kernfs_update genfs_nullop +#define kernfs_bwrite genfs_eopnotsupp +#define kernfs_putpages genfs_putpages + +static int kernfs_xread __P((struct kernfs_node *, int, char **, size_t, size_t *)); +static int kernfs_xwrite __P((const struct kernfs_node *, char *, size_t)); + +int (**kernfs_vnodeop_p) __P((void *)); +const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { + { &vop_default_desc, vn_default_error }, + { &vop_lookup_desc, kernfs_lookup }, /* lookup */ + { &vop_create_desc, kernfs_create }, /* create */ + { &vop_mknod_desc, kernfs_mknod }, /* mknod */ + { &vop_open_desc, kernfs_open }, /* open */ + { &vop_close_desc, kernfs_close }, /* close */ + { &vop_access_desc, kernfs_access }, /* access */ + { &vop_getattr_desc, kernfs_getattr }, /* getattr */ + { &vop_setattr_desc, kernfs_setattr }, /* setattr */ + { &vop_read_desc, kernfs_read }, /* read */ + { &vop_write_desc, kernfs_write }, /* write */ + { &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */ + { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ + { &vop_poll_desc, kernfs_poll }, /* poll */ + { &vop_revoke_desc, kernfs_revoke }, /* revoke */ + { &vop_mmap_desc, kernfs_mmap }, /* mmap */ + { &vop_fsync_desc, kernfs_fsync }, /* fsync */ + { &vop_seek_desc, kernfs_seek }, /* seek */ + { &vop_remove_desc, kernfs_remove }, /* remove */ + { &vop_link_desc, kernfs_link }, /* link */ + { &vop_rename_desc, kernfs_rename }, /* rename */ + { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ + { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ + { &vop_symlink_desc, kernfs_symlink }, /* symlink */ + { &vop_readdir_desc, kernfs_readdir }, /* readdir */ + { &vop_readlink_desc, kernfs_readlink }, /* readlink */ + { &vop_abortop_desc, kernfs_abortop }, /* abortop */ + { &vop_inactive_desc, kernfs_inactive }, /* inactive */ + { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ + { &vop_lock_desc, kernfs_lock }, /* lock */ + { &vop_unlock_desc, kernfs_unlock }, /* unlock */ + { &vop_bmap_desc, kernfs_bmap }, /* bmap */ + { &vop_strategy_desc, kernfs_strategy }, /* strategy */ + { &vop_print_desc, kernfs_print }, /* print */ + { &vop_islocked_desc, kernfs_islocked }, /* islocked */ + { &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ + { &vop_advlock_desc, kernfs_advlock }, /* advlock */ + { &vop_blkatoff_desc, kernfs_blkatoff }, /* blkatoff */ + { &vop_valloc_desc, kernfs_valloc }, /* valloc */ + { &vop_vfree_desc, kernfs_vfree }, /* vfree */ + { &vop_truncate_desc, kernfs_truncate }, /* truncate */ + { &vop_update_desc, kernfs_update }, /* update */ + { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ + { &vop_putpages_desc, kernfs_putpages }, /* putpages */ + { NULL, NULL } +}; +const struct vnodeopv_desc kernfs_vnodeop_opv_desc = + { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; + +static __inline int +kernfs_fileop_compare(struct kernfs_fileop *a, struct kernfs_fileop *b) +{ + if (a->kf_type < b->kf_type) + return -1; + if (a->kf_type > b->kf_type) + return 1; + if (a->kf_fileop < b->kf_fileop) + return -1; + if (a->kf_fileop > b->kf_fileop) + return 1; + return (0); +} + +SPLAY_HEAD(kfsfileoptree, kernfs_fileop) kfsfileoptree = + SPLAY_INITIALIZER(kfsfileoptree); +SPLAY_PROTOTYPE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); +SPLAY_GENERATE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); + +kfstype +kernfs_alloctype(int nkf, const struct kernfs_fileop *kf) +{ + static u_char nextfreetype = KFSlasttype; + struct kernfs_fileop *dkf, *fkf, skf; + int i; + + /* XXX need to keep track of dkf's memory if we support + deallocating types */ + dkf = malloc(sizeof(kernfs_default_fileops), M_TEMP, M_WAITOK); + memcpy(dkf, kernfs_default_fileops, sizeof(kernfs_default_fileops)); + + for (i = 0; i < sizeof(kernfs_default_fileops) / + sizeof(kernfs_default_fileops[0]); i++) { + dkf[i].kf_type = nextfreetype; + SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]); + } + + for (i = 0; i < nkf; i++) { + skf.kf_type = nextfreetype; + skf.kf_fileop = kf[i].kf_fileop; + if ((fkf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) + fkf->kf_genop = kf[i].kf_genop; + } + + return nextfreetype++; +} + +int +kernfs_try_fileop(kfstype type, kfsfileop fileop, void *v, int error) +{ + const struct kernfs_fileop *kf; + struct kernfs_fileop skf; + + skf.kf_type = type; + skf.kf_fileop = fileop; + kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf); + if (kf == NULL) + kf = &kernfs_default_fileops[fileop]; + if (kf->kf_vop) + return kf->kf_vop(v); + return error; +} + +int +kernfs_try_xread(kfstype type, const struct kernfs_node *kfs, int off, + char **bufp, size_t len, size_t *wrlen, int error) +{ + const struct kernfs_fileop *kf; + struct kernfs_fileop skf; + + skf.kf_type = type; + skf.kf_fileop = KERNFS_XREAD; + kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf); + if (kf == NULL) + kf = &kernfs_default_fileops[KERNFS_XREAD]; + if (kf->kf_xread) + return kf->kf_xread(kfs, off, bufp, len, wrlen); + *wrlen = 0; + return error; +} + +int +kernfs_try_xwrite(kfstype type, const struct kernfs_node *kfs, char *buf, + size_t len, int error) +{ + const struct kernfs_fileop *kf; + struct kernfs_fileop skf; + + skf.kf_type = type; + skf.kf_fileop = KERNFS_XWRITE; + kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf); + if (kf == NULL) + kf = &kernfs_default_fileops[KERNFS_XWRITE]; + if (kf->kf_xwrite) + return kf->kf_xwrite(kfs, buf, len); + return error; +} + +int +kernfs_addentry(kernfs_parentdir_t *pkt, kernfs_entry_t *dkt) +{ + struct kernfs_subdir *ks, *parent; + + if (pkt == NULL) { + SIMPLEQ_INSERT_TAIL(&dyn_kern_targets, dkt, dkt_queue); + nkern_targets++; + if (dkt->dkt_kt.kt_vtype == VDIR) + nkern_dirs++; + } else { + parent = (struct kernfs_subdir *)pkt->kt_data; + SIMPLEQ_INSERT_TAIL(&parent->ks_entries, dkt, dkt_queue); + parent->ks_nentries++; + if (dkt->dkt_kt.kt_vtype == VDIR) + parent->ks_dirs++; + } + if (dkt->dkt_kt.kt_vtype == VDIR && dkt->dkt_kt.kt_data == NULL) { + ks = malloc(sizeof(struct kernfs_subdir), + M_TEMP, M_WAITOK); + SIMPLEQ_INIT(&ks->ks_entries); + ks->ks_nentries = 2; /* . and .. */ + ks->ks_dirs = 2; + ks->ks_parent = pkt ? pkt : &kern_targets[0]; + dkt->dkt_kt.kt_data = ks; + } + return 0; +} + +static int +kernfs_xread(kfs, off, bufp, len, wrlen) + struct kernfs_node *kfs; + int off; + char **bufp; + size_t len; + size_t *wrlen; +{ + const struct kern_target *kt; +#ifdef IPSEC + struct mbuf *m; +#endif + + kt = kfs->kfs_kt; + + switch (kfs->kfs_type) { + case KFStime: { + struct timeval tv; + + microtime(&tv); + snprintf(*bufp, len, "%ld %ld\n", tv.tv_sec, tv.tv_usec); + break; + } + + case KFSint: { + int *ip = kt->kt_data; + + snprintf(*bufp, len, "%d\n", *ip); + break; + } + + case KFSstring: { + char *cp = kt->kt_data; + + *bufp = cp; + break; + } + + case KFSmsgbuf: { + long n; + + /* + * deal with cases where the message buffer has + * become corrupted. + */ + if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { + msgbufenabled = 0; + return (ENXIO); + } + + /* + * Note that reads of /kern/msgbuf won't necessarily yield + * consistent results, if the message buffer is modified + * while the read is in progress. The worst that can happen + * is that incorrect data will be read. There's no way + * that this can crash the system unless the values in the + * message buffer header are corrupted, but that'll cause + * the system to die anyway. + */ + if (off >= msgbufp->msg_bufs) { + *wrlen = 0; + return (0); + } + n = msgbufp->msg_bufx + off; + if (n >= msgbufp->msg_bufs) + n -= msgbufp->msg_bufs; + len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off); + *bufp = msgbufp->msg_bufc + n; + *wrlen = len; + return (0); + } + + case KFShostname: { + char *cp = hostname; + int xlen = hostnamelen; + + if (xlen >= (len - 2)) + return (EINVAL); + + memcpy(*bufp, cp, xlen); + (*bufp)[xlen] = '\n'; + (*bufp)[xlen+1] = '\0'; + len = strlen(*bufp); + break; + } + + case KFSavenrun: + averunnable.fscale = FSCALE; + snprintf(*bufp, len, "%d %d %d %ld\n", + averunnable.ldavg[0], averunnable.ldavg[1], + averunnable.ldavg[2], averunnable.fscale); + break; + +#ifdef IPSEC + case KFSipsecsa: + /* + * Note that SA configuration could be changed during the + * read operation, resulting in garbled output. + */ + m = key_setdumpsa_spi(htonl(kfs->kfs_value)); + if (!m) + return (ENOBUFS); + if (off >= m->m_pkthdr.len) { + *wrlen = 0; + m_freem(m); + return (0); + } + if (len > m->m_pkthdr.len - off) + len = m->m_pkthdr.len - off; + m_copydata(m, off, len, *bufp); + *wrlen = len; + m_freem(m); + return (0); + + case KFSipsecsp: + /* + * Note that SP configuration could be changed during the + * read operation, resulting in garbled output. + */ + if (!kfs->kfs_v) { + struct secpolicy *sp; + + sp = key_getspbyid(kfs->kfs_value); + if (sp) + kfs->kfs_v = sp; + else + return (ENOENT); + } + m = key_setdumpsp((struct secpolicy *)kfs->kfs_v, + SADB_X_SPDGET, 0, 0); + if (!m) + return (ENOBUFS); + if (off >= m->m_pkthdr.len) { + *wrlen = 0; + m_freem(m); + return (0); + } + if (len > m->m_pkthdr.len - off) + len = m->m_pkthdr.len - off; + m_copydata(m, off, len, *bufp); + *wrlen = len; + m_freem(m); + return (0); +#endif + + default: + return kernfs_try_xread(kfs->kfs_type, kfs, off, bufp, len, + wrlen, 0); + } + + len = strlen(*bufp); + if (len <= off) + *wrlen = 0; + else { + *bufp += off; + *wrlen = len - off; + } + return (0); +} + +static int +kernfs_xwrite(kfs, buf, len) + const struct kernfs_node *kfs; + char *buf; + size_t len; +{ + + switch (kfs->kfs_type) { + case KFShostname: + if (buf[len-1] == '\n') + --len; + memcpy(hostname, buf, len); + hostname[len] = '\0'; + hostnamelen = (size_t) len; + return (0); + + default: + return kernfs_try_xwrite(kfs->kfs_type, kfs, buf, len, EIO); + } +} + + +/* + * vp is the current namei directory + * ndp is the name to locate in that directory... + */ +int +kernfs_lookup(v) + void *v; +{ + struct vop_lookup_args /* { + struct vnode * a_dvp; + struct vnode ** a_vpp; + struct componentname * a_cnp; + } */ *ap = v; + struct componentname *cnp = ap->a_cnp; + struct vnode **vpp = ap->a_vpp; + struct vnode *dvp = ap->a_dvp; + const char *pname = cnp->cn_nameptr; + const struct kernfs_node *kfs; + const struct kern_target *kt; + const struct dyn_kern_target *dkt; + const struct kernfs_subdir *ks; + int error, i, wantpunlock; +#ifdef IPSEC + char *ep; + u_int32_t id; +#endif + + *vpp = NULLVP; + cnp->cn_flags &= ~PDIRUNLOCK; + + if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) + return (EROFS); + + if (cnp->cn_namelen == 1 && *pname == '.') { + *vpp = dvp; + VREF(dvp); + return (0); + } + + wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN)); + kfs = VTOKERN(dvp); + switch (kfs->kfs_type) { + case KFSkern: + /* + * Shouldn't get here with .. in the root node. + */ + if (cnp->cn_flags & ISDOTDOT) + return (EIO); + + for (i = 0; i < static_nkern_targets; i++) { + kt = &kern_targets[i]; + if (cnp->cn_namelen == kt->kt_namlen && + memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) + goto found; + } + SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) { + if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && + memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { + kt = &dkt->dkt_kt; + goto found; + } + } + break; + + found: + error = kernfs_allocvp(dvp->v_mount, vpp, kt->kt_tag, kt, 0); + if ((error == 0) && wantpunlock) { + VOP_UNLOCK(dvp, 0); + cnp->cn_flags |= PDIRUNLOCK; + } + return (error); + + case KFSsubdir: + ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; + if (cnp->cn_flags & ISDOTDOT) { + kt = ks->ks_parent; + goto found; + } + + SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) { + if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && + memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { + kt = &dkt->dkt_kt; + goto found; + } + } + break; + +#ifdef IPSEC + case KFSipsecsadir: + if (cnp->cn_flags & ISDOTDOT) { + kt = &kern_targets[0]; + goto found; + } + + for (i = 2; i < nipsecsa_targets; i++) { + kt = &ipsecsa_targets[i]; + if (cnp->cn_namelen == kt->kt_namlen && + memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) + goto found; + } + + ep = NULL; + id = strtoul(pname, &ep, 10); + if (!ep || *ep || ep == pname) + break; + + error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsa, &ipsecsa_kt, id); + if ((error == 0) && wantpunlock) { + VOP_UNLOCK(dvp, 0); + cnp->cn_flags |= PDIRUNLOCK; + } + return (error); + + case KFSipsecspdir: + if (cnp->cn_flags & ISDOTDOT) { + kt = &kern_targets[0]; + goto found; + } + + for (i = 2; i < nipsecsp_targets; i++) { + kt = &ipsecsp_targets[i]; + if (cnp->cn_namelen == kt->kt_namlen && + memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) + goto found; + } + + ep = NULL; + id = strtoul(pname, &ep, 10); + if (!ep || *ep || ep == pname) + break; + + error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsp, &ipsecsp_kt, id); + if ((error == 0) && wantpunlock) { + VOP_UNLOCK(dvp, 0); + cnp->cn_flags |= PDIRUNLOCK; + } + return (error); +#endif + + default: + return (ENOTDIR); + } + + return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); +} + +int +kernfs_open(v) + void *v; +{ + struct vop_open_args /* { + struct vnode *a_vp; + int a_mode; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); +#ifdef IPSEC + struct mbuf *m; + struct secpolicy *sp; +#endif + + switch (kfs->kfs_type) { +#ifdef IPSEC + case KFSipsecsa: + m = key_setdumpsa_spi(htonl(kfs->kfs_value)); + if (m) { + m_freem(m); + return (0); + } else + return (ENOENT); + + case KFSipsecsp: + sp = key_getspbyid(kfs->kfs_value); + if (sp) { + kfs->kfs_v = sp; + return (0); + } else + return (ENOENT); +#endif + + default: + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN, + v, 0); + } +} + +int +kernfs_close(v) + void *v; +{ + struct vop_close_args /* { + struct vnode *a_vp; + int a_fflag; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + + switch (kfs->kfs_type) { +#ifdef IPSEC + case KFSipsecsp: + key_freesp((struct secpolicy *)kfs->kfs_v); + break; +#endif + + default: + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE, + v, 0); + } + + return (0); +} + +int +kernfs_access(v) + void *v; +{ + struct vop_access_args /* { + struct vnode *a_vp; + int a_mode; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct vattr va; + int error; + + if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred, ap->a_p)) != 0) + return (error); + + return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid, + ap->a_mode, ap->a_cred)); +} + +static int +kernfs_default_fileop_getattr(v) + void *v; +{ + struct vop_getattr_args /* { + struct vnode *a_vp; + struct vattr *a_vap; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct vattr *vap = ap->a_vap; + + vap->va_nlink = 1; + vap->va_bytes = vap->va_size = 0; + + return 0; +} + +int +kernfs_getattr(v) + void *v; +{ + struct vop_getattr_args /* { + struct vnode *a_vp; + struct vattr *a_vap; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + struct kernfs_subdir *ks; + struct vattr *vap = ap->a_vap; + int error = 0; + char strbuf[KSTRING], *buf; + size_t nread, total; + + VATTR_NULL(vap); + vap->va_type = ap->a_vp->v_type; + vap->va_uid = 0; + vap->va_gid = 0; + vap->va_mode = kfs->kfs_mode; + vap->va_fileid = kfs->kfs_fileno; + vap->va_flags = 0; + vap->va_size = 0; + vap->va_blocksize = DEV_BSIZE; + /* + * Make all times be current TOD, except for the "boottime" node. + * Avoid microtime(9), it's slow. + * We don't guard the read from time(9) with splclock(9) since we + * don't actually need to be THAT sure the access is atomic. + */ + if (kfs->kfs_kt && kfs->kfs_kt->kt_namlen == 8 && + !memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) { + TIMEVAL_TO_TIMESPEC(&boottime, &vap->va_ctime); + } else { + TIMEVAL_TO_TIMESPEC(&time, &vap->va_ctime); + } + vap->va_atime = vap->va_mtime = vap->va_ctime; + vap->va_gen = 0; + vap->va_flags = 0; + vap->va_rdev = 0; + vap->va_bytes = 0; + + switch (kfs->kfs_type) { + case KFSkern: + vap->va_nlink = nkern_dirs; + vap->va_bytes = vap->va_size = DEV_BSIZE; + break; + + case KFSroot: + vap->va_nlink = 1; + vap->va_bytes = vap->va_size = DEV_BSIZE; + break; + + case KFSsubdir: + ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; + vap->va_nlink = ks->ks_dirs; + vap->va_bytes = vap->va_size = DEV_BSIZE; + break; + + case KFSnull: + case KFStime: + case KFSint: + case KFSstring: + case KFShostname: + case KFSavenrun: + case KFSdevice: + case KFSmsgbuf: +#ifdef IPSEC + case KFSipsecsa: + case KFSipsecsp: +#endif + vap->va_nlink = 1; + total = 0; + do { + buf = strbuf; + error = kernfs_xread(kfs, total, &buf, + sizeof(strbuf), &nread); + total += nread; + } while (error == 0 && nread != 0); + vap->va_bytes = vap->va_size = total; + break; + +#ifdef IPSEC + case KFSipsecsadir: + case KFSipsecspdir: + vap->va_nlink = 2; + vap->va_bytes = vap->va_size = DEV_BSIZE; + break; +#endif + + default: + error = kernfs_try_fileop(kfs->kfs_type, + KERNFS_FILEOP_GETATTR, v, EINVAL); + break; + } + + return (error); +} + +/*ARGSUSED*/ +int +kernfs_setattr(v) + void *v; +{ + + /* + * Silently ignore attribute changes. + * This allows for open with truncate to have no + * effect until some data is written. I want to + * do it this way because all writes are atomic. + */ + return (0); +} + +static int +kernfs_default_xread(v) + void *v; +{ + struct vop_read_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap = v; + struct uio *uio = ap->a_uio; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + char strbuf[KSTRING], *buf; + off_t off; + size_t len; + int error; + + if (ap->a_vp->v_type == VDIR) + return (EOPNOTSUPP); + + off = uio->uio_offset; + buf = strbuf; + if ((error = kernfs_xread(kfs, off, &buf, sizeof(strbuf), &len)) == 0) + error = uiomove(buf, len, uio); + return (error); +} + +int +kernfs_read(v) + void *v; +{ + struct vop_read_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, 0); +} + +static int +kernfs_default_xwrite(v) + void *v; +{ + struct vop_write_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + struct uio *uio = ap->a_uio; + int error, xlen; + char strbuf[KSTRING]; + + if (uio->uio_offset != 0) + return (EINVAL); + + xlen = min(uio->uio_resid, KSTRING-1); + if ((error = uiomove(strbuf, xlen, uio)) != 0) + return (error); + + if (uio->uio_resid != 0) + return (EIO); + + strbuf[xlen] = '\0'; + xlen = strlen(strbuf); + return (kernfs_xwrite(kfs, strbuf, xlen)); +} + +int +kernfs_write(v) + void *v; +{ + struct vop_write_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, 0); +} + +int +kernfs_ioctl(v) + void *v; +{ + struct vop_ioctl_args /* { + const struct vnodeop_desc *a_desc; + struct vnode *a_vp; + u_long a_command; + void *a_data; + int a_fflag; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v, + EPASSTHROUGH); +} + +int +kernfs_mmap(v) + void *v; +{ + struct vop_mmap_args /* { + const struct vnodeop_desc *a_desc; + struct vnode *a_vp; + int a_fflags; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap = v; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + + return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_MMAP, v, 0); +} + +static int +kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt, + u_int32_t value, struct vop_readdir_args *ap) +{ + struct kernfs_node *kfs; + struct vnode *vp; + int error; + + if ((error = kernfs_allocvp(ap->a_vp->v_mount, &vp, kt->kt_tag, kt, + value)) != 0) + return error; + if (kt->kt_tag == KFSdevice) { + struct vattr va; + if ((error = VOP_GETATTR(vp, &va, ap->a_cred, + ap->a_uio->uio_segflg == UIO_USERSPACE ? + ap->a_uio->uio_procp : &proc0)) != 0) + return (error); + d->d_fileno = va.va_fileid; + } else { + kfs = VTOKERN(vp); + d->d_fileno = kfs->kfs_fileno; + } + vput(vp); + return 0; +} + +static int +kernfs_setdirentfileno(struct dirent *d, off_t entry, + struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt, + const struct kern_target *kt, struct vop_readdir_args *ap) +{ + const struct kern_target *ikt; + int error; + + switch (entry) { + case 0: + d->d_fileno = thisdir_kfs->kfs_fileno; + return 0; + case 1: + ikt = parent_kt; + break; + default: + ikt = kt; + break; + } + if (ikt != thisdir_kfs->kfs_kt) { + if ((error = kernfs_setdirentfileno_kt(d, ikt, 0, ap)) != 0) + return error; + } else + d->d_fileno = thisdir_kfs->kfs_fileno; + return 0; +} + +int +kernfs_readdir(v) + void *v; +{ + struct vop_readdir_args /* { + struct vnode *a_vp; + struct uio *a_uio; + struct ucred *a_cred; + int *a_eofflag; + off_t **a_cookies; + int a_*ncookies; + } */ *ap = v; + struct uio *uio = ap->a_uio; + struct dirent d; + struct kernfs_node *kfs = VTOKERN(ap->a_vp); + const struct kern_target *kt; + const struct dyn_kern_target *dkt = NULL; + const struct kernfs_subdir *ks; + off_t i, j; + int error; + off_t *cookies = NULL; + int ncookies = 0, n; +#ifdef IPSEC + struct secasvar *sav, *sav2; + struct secpolicy *sp; +#endif + + if (uio->uio_resid < UIO_MX) + return (EINVAL); + if (uio->uio_offset < 0) + return (EINVAL); + + error = 0; + i = uio->uio_offset; + memset(&d, 0, sizeof(d)); + d.d_reclen = UIO_MX; + ncookies = uio->uio_resid / UIO_MX; + + switch (kfs->kfs_type) { + case KFSkern: + if (i >= nkern_targets) + return (0); + + if (ap->a_ncookies) { + ncookies = min(ncookies, (nkern_targets - i)); + cookies = malloc(ncookies * sizeof(off_t), M_TEMP, + M_WAITOK); + *ap->a_cookies = cookies; + } + + n = 0; + for (; i < nkern_targets && uio->uio_resid >= UIO_MX; i++) { + if (i < static_nkern_targets) + kt = &kern_targets[i]; + else { + if (dkt == NULL) { + dkt = SIMPLEQ_FIRST(&dyn_kern_targets); + for (j = static_nkern_targets; j < i && + dkt != NULL; j++) + dkt = SIMPLEQ_NEXT(dkt, dkt_queue); + if (j != i) + break; + } else { + dkt = SIMPLEQ_NEXT(dkt, dkt_queue); + if (dkt == NULL) + break; + } + kt = &dkt->dkt_kt; + } + if (kt->kt_tag == KFSdevice) { + dev_t *dp = kt->kt_data; + struct vnode *fvp; + + if (*dp == NODEV || + !vfinddev(*dp, kt->kt_vtype, &fvp)) + continue; + } + d.d_namlen = kt->kt_namlen; + if ((error = kernfs_setdirentfileno(&d, i, kfs, + &kern_targets[0], kt, ap)) != 0) + break; + memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); + d.d_type = kt->kt_type; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + } + ncookies = n; + break; + + case KFSroot: + if (i >= 2) + return 0; + + if (ap->a_ncookies) { + ncookies = min(ncookies, (2 - i)); + cookies = malloc(ncookies * sizeof(off_t), M_TEMP, + M_WAITOK); + *ap->a_cookies = cookies; + } + + n = 0; + for (; i < 2 && uio->uio_resid >= UIO_MX; i++) { + kt = &kern_targets[i]; + d.d_namlen = kt->kt_namlen; + d.d_fileno = KERNFS_FILENO(kt, kt->kt_tag, 0); + memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); + d.d_type = kt->kt_type; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + } + ncookies = n; + break; + + case KFSsubdir: + ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; + if (i >= ks->ks_nentries) + return (0); + + if (ap->a_ncookies) { + ncookies = min(ncookies, (ks->ks_nentries - i)); + cookies = malloc(ncookies * sizeof(off_t), M_TEMP, + M_WAITOK); + *ap->a_cookies = cookies; + } + + dkt = SIMPLEQ_FIRST(&ks->ks_entries); + for (j = 0; j < i && dkt != NULL; j++) + dkt = SIMPLEQ_NEXT(dkt, dkt_queue); + n = 0; + for (; i < ks->ks_nentries && uio->uio_resid >= UIO_MX; i++) { + if (i < 2) + kt = &subdir_targets[i]; + else { + /* check if ks_nentries lied to us */ + if (dkt == NULL) + break; + kt = &dkt->dkt_kt; + dkt = SIMPLEQ_NEXT(dkt, dkt_queue); + } + if (kt->kt_tag == KFSdevice) { + dev_t *dp = kt->kt_data; + struct vnode *fvp; + + if (*dp == NODEV || + !vfinddev(*dp, kt->kt_vtype, &fvp)) + continue; + } + d.d_namlen = kt->kt_namlen; + if ((error = kernfs_setdirentfileno(&d, i, kfs, + ks->ks_parent, kt, ap)) != 0) + break; + memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); + d.d_type = kt->kt_type; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + } + ncookies = n; + break; + +#ifdef IPSEC + case KFSipsecsadir: + /* count SA in the system */ + n = 0; + TAILQ_FOREACH(sav, &satailq, tailq) { + for (sav2 = TAILQ_FIRST(&satailq); + sav2 != sav; + sav2 = TAILQ_NEXT(sav2, tailq)) { + if (sav->spi == sav2->spi) { + /* multiple SA with same SPI */ + break; + } + } + if (sav == sav2 || sav->spi != sav2->spi) + n++; + } + + if (i >= nipsecsa_targets + n) + return (0); + + if (ap->a_ncookies) { + ncookies = min(ncookies, (n - i)); + cookies = malloc(ncookies * sizeof(off_t), M_TEMP, + M_WAITOK); + *ap->a_cookies = cookies; + } + + n = 0; + for (; i < nipsecsa_targets && uio->uio_resid >= UIO_MX; i++) { + kt = &ipsecsa_targets[i]; + d.d_namlen = kt->kt_namlen; + if ((error = kernfs_setdirentfileno(&d, i, kfs, + &kern_targets[0], kt, ap)) != 0) + break; + memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); + d.d_type = kt->kt_type; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + } + if (error) { + ncookies = n; + break; + } + + TAILQ_FOREACH(sav, &satailq, tailq) { + for (sav2 = TAILQ_FIRST(&satailq); + sav2 != sav; + sav2 = TAILQ_NEXT(sav2, tailq)) { + if (sav->spi == sav2->spi) { + /* multiple SA with same SPI */ + break; + } + } + if (sav != sav2 && sav->spi == sav2->spi) + continue; + if (uio->uio_resid < UIO_MX) + break; + if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsa_kt, + sav->spi, ap)) != 0) + break; + d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), + "%u", ntohl(sav->spi)); + d.d_type = DT_REG; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + i++; + } + ncookies = n; + break; + + case KFSipsecspdir: + /* count SP in the system */ + n = 0; + TAILQ_FOREACH(sp, &sptailq, tailq) + n++; + + if (i >= nipsecsp_targets + n) + return (0); + + if (ap->a_ncookies) { + ncookies = min(ncookies, (n - i)); + cookies = malloc(ncookies * sizeof(off_t), M_TEMP, + M_WAITOK); + *ap->a_cookies = cookies; + } + + n = 0; + for (; i < nipsecsp_targets && uio->uio_resid >= UIO_MX; i++) { + kt = &ipsecsp_targets[i]; + d.d_namlen = kt->kt_namlen; + if ((error = kernfs_setdirentfileno(&d, i, kfs, + &kern_targets[0], kt, ap)) != 0) + break; + memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); + d.d_type = kt->kt_type; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + } + if (error) { + ncookies = n; + break; + } + + TAILQ_FOREACH(sp, &sptailq, tailq) { + if (uio->uio_resid < UIO_MX) + break; + if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsp_kt, + sp->id, ap)) != 0) + break; + d.d_namlen = snprintf(d.d_name, sizeof(d.d_name), + "%u", sp->id); + d.d_type = DT_REG; + if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) + break; + if (cookies) + *cookies++ = i + 1; + n++; + i++; + } + ncookies = n; + break; +#endif + + default: + error = ENOTDIR; + break; + } + + if (ap->a_ncookies) { + if (error) { + if (cookies) + free(*ap->a_cookies, M_TEMP); + *ap->a_ncookies = 0; + *ap->a_cookies = NULL; + } else + *ap->a_ncookies = ncookies; + } + + uio->uio_offset = i; + return (error); +} + +int +kernfs_inactive(v) + void *v; +{ + struct vop_inactive_args /* { + struct vnode *a_vp; + struct proc *a_p; + } */ *ap = v; + struct vnode *vp = ap->a_vp; + const struct kernfs_node *kfs = VTOKERN(ap->a_vp); +#ifdef IPSEC + struct mbuf *m; + struct secpolicy *sp; +#endif + + VOP_UNLOCK(vp, 0); + switch (kfs->kfs_type) { +#ifdef IPSEC + case KFSipsecsa: + m = key_setdumpsa_spi(htonl(kfs->kfs_value)); + if (m) + m_freem(m); + else + vgone(vp); + break; + case KFSipsecsp: + sp = key_getspbyid(kfs->kfs_value); + if (sp) + key_freesp(sp); + else { + /* should never happen as we hold a refcnt */ + vgone(vp); + } + break; +#endif + default: + break; + } + return (0); +} + +int +kernfs_reclaim(v) + void *v; +{ + struct vop_reclaim_args /* { + struct vnode *a_vp; + } */ *ap = v; + + return (kernfs_freevp(ap->a_vp)); +} + +/* + * Return POSIX pathconf information applicable to special devices. + */ +int +kernfs_pathconf(v) + void *v; +{ + struct vop_pathconf_args /* { + struct vnode *a_vp; + int a_name; + register_t *a_retval; + } */ *ap = v; + + switch (ap->a_name) { + case _PC_LINK_MAX: + *ap->a_retval = LINK_MAX; + return (0); + case _PC_MAX_CANON: + *ap->a_retval = MAX_CANON; + return (0); + case _PC_MAX_INPUT: + *ap->a_retval = MAX_INPUT; + return (0); + case _PC_PIPE_BUF: + *ap->a_retval = PIPE_BUF; + return (0); + case _PC_CHOWN_RESTRICTED: + *ap->a_retval = 1; + return (0); + case _PC_VDISABLE: + *ap->a_retval = _POSIX_VDISABLE; + return (0); + case _PC_SYNC_IO: + *ap->a_retval = 1; + return (0); + default: + return (EINVAL); + } + /* NOTREACHED */ +} + +/* + * Print out the contents of a /dev/fd vnode. + */ +/* ARGSUSED */ +int +kernfs_print(v) + void *v; +{ + + printf("tag VT_KERNFS, kernfs vnode\n"); + return (0); +} + +int +kernfs_link(v) + void *v; +{ + struct vop_link_args /* { + struct vnode *a_dvp; + struct vnode *a_vp; + struct componentname *a_cnp; + } */ *ap = v; + + VOP_ABORTOP(ap->a_dvp, ap->a_cnp); + vput(ap->a_dvp); + return (EROFS); +} + +int +kernfs_symlink(v) + void *v; +{ + struct vop_symlink_args /* { + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + struct vattr *a_vap; + char *a_target; + } */ *ap = v; + + VOP_ABORTOP(ap->a_dvp, ap->a_cnp); + vput(ap->a_dvp); + return (EROFS); +} |