diff options
Diffstat (limited to 'target/linux/uml/patches-4.1')
4 files changed, 473 insertions, 0 deletions
diff --git a/target/linux/uml/patches-4.1/001-um-Stop-abusing-__KERNEL__.patch b/target/linux/uml/patches-4.1/001-um-Stop-abusing-__KERNEL__.patch new file mode 100644 index 0000000..a46a5be --- /dev/null +++ b/target/linux/uml/patches-4.1/001-um-Stop-abusing-__KERNEL__.patch @@ -0,0 +1,94 @@ +From: Richard Weinberger <richard@nod.at> +Date: Sun, 31 May 2015 19:50:57 +0200 +Subject: [PATCH] um: Stop abusing __KERNEL__ + +Currently UML is abusing __KERNEL__ to distinguish between +kernel and host code (os-Linux). It is better to use a custom +define such that existing users of __KERNEL__ don't get confused. + +Signed-off-by: Richard Weinberger <richard@nod.at> +--- + +--- a/arch/um/drivers/mconsole.h ++++ b/arch/um/drivers/mconsole.h +@@ -7,7 +7,7 @@ + #ifndef __MCONSOLE_H__ + #define __MCONSOLE_H__ + +-#ifndef __KERNEL__ ++#ifdef __UM_HOST__ + #include <stdint.h> + #define u32 uint32_t + #endif +--- a/arch/um/include/shared/init.h ++++ b/arch/um/include/shared/init.h +@@ -40,7 +40,7 @@ + typedef int (*initcall_t)(void); + typedef void (*exitcall_t)(void); + +-#ifndef __KERNEL__ ++#ifdef __UM_HOST__ + #ifndef __section + # define __section(S) __attribute__ ((__section__(#S))) + #endif +@@ -131,7 +131,7 @@ extern struct uml_param __uml_setup_star + #define __uml_postsetup_call __used __section(.uml.postsetup.init) + #define __uml_exit_call __used __section(.uml.exitcall.exit) + +-#ifndef __KERNEL__ ++#ifdef __UM_HOST__ + + #define __define_initcall(level,fn) \ + static initcall_t __initcall_##fn __used \ +--- a/arch/um/include/shared/user.h ++++ b/arch/um/include/shared/user.h +@@ -17,7 +17,7 @@ + #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + + /* This is to get size_t */ +-#ifdef __KERNEL__ ++#ifndef __UM_HOST__ + #include <linux/types.h> + #else + #include <stddef.h> +--- a/arch/um/Makefile ++++ b/arch/um/Makefile +@@ -68,9 +68,10 @@ KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) - + + KBUILD_AFLAGS += $(ARCH_INCLUDE) + +-USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ +- $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ +- $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include ++USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \ ++ $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \ ++ -D_FILE_OFFSET_BITS=64 -idirafter include \ ++ -D__KERNEL__ -D__UM_HOST__ + + #This will adjust *FLAGS accordingly to the platform. + include $(ARCH_DIR)/Makefile-os-$(OS) +--- a/arch/x86/um/shared/sysdep/tls.h ++++ b/arch/x86/um/shared/sysdep/tls.h +@@ -1,7 +1,7 @@ + #ifndef _SYSDEP_TLS_H + #define _SYSDEP_TLS_H + +-# ifndef __KERNEL__ ++#ifdef __UM_HOST__ + + /* Change name to avoid conflicts with the original one from <asm/ldt.h>, which + * may be named user_desc (but in 2.4 and in header matching its API was named +@@ -22,11 +22,11 @@ typedef struct um_dup_user_desc { + #endif + } user_desc_t; + +-# else /* __KERNEL__ */ ++#else /* __UM_HOST__ */ + + typedef struct user_desc user_desc_t; + +-# endif /* __KERNEL__ */ ++#endif /* __UM_HOST__ */ + + extern int os_set_thread_area(user_desc_t *info, int pid); + extern int os_get_thread_area(user_desc_t *info, int pid); diff --git a/target/linux/uml/patches-4.1/002-um-Remove-copy-paste-code-from-init.h.patch b/target/linux/uml/patches-4.1/002-um-Remove-copy-paste-code-from-init.h.patch new file mode 100644 index 0000000..6733384 --- /dev/null +++ b/target/linux/uml/patches-4.1/002-um-Remove-copy-paste-code-from-init.h.patch @@ -0,0 +1,44 @@ +From: Richard Weinberger <richard@nod.at> +Date: Sun, 31 May 2015 22:15:58 +0200 +Subject: [PATCH] um: Remove copy&paste code from init.h + +As we got rid of the __KERNEL__ abuse, we can directly +include linux/compiler.h now. +This also allows gcc 5 to build UML. + +Reported-by: Hans-Werner Hilse <hwhilse@gmail.com> +Signed-off-by: Richard Weinberger <richard@nod.at> +--- + +--- a/arch/um/include/shared/init.h ++++ b/arch/um/include/shared/init.h +@@ -40,28 +40,8 @@ + typedef int (*initcall_t)(void); + typedef void (*exitcall_t)(void); + +-#ifdef __UM_HOST__ +-#ifndef __section +-# define __section(S) __attribute__ ((__section__(#S))) +-#endif +- +-#if __GNUC__ == 3 +- +-#if __GNUC_MINOR__ >= 3 +-# define __used __attribute__((__used__)) +-#else +-# define __used __attribute__((__unused__)) +-#endif +- +-#else +-#if __GNUC__ == 4 +-# define __used __attribute__((__used__)) +-#endif +-#endif +- +-#else + #include <linux/compiler.h> +-#endif ++ + /* These are for everybody (although not all archs will actually + discard it in modules) */ + #define __init __section(.init.text) diff --git a/target/linux/uml/patches-4.1/101-mconsole-exec.patch b/target/linux/uml/patches-4.1/101-mconsole-exec.patch new file mode 100644 index 0000000..ac300a9 --- /dev/null +++ b/target/linux/uml/patches-4.1/101-mconsole-exec.patch @@ -0,0 +1,211 @@ +# +# Minimalist mconsole exec patch +# +# 3.10 version (with bit more synchronous behavior) by fingon at iki dot fi +# Adaptation to kernel 3.3.8 made by David Fernández (david at dit.upm.es) for +# Starting point: mconsole-exec-2.6.30.patch for kernel 2.6.30 +# Author of original patch: Paolo Giarrusso, aka Blaisorblade +# (http://www.user-mode-linux.org/~blaisorblade) +# +# Known misfeatures: +# +# - If output is too long, blocks (and breaks horribly) +# (this misfeature from 3.10 patches, when minimalizing the patch; +# workaround: redirect to a shared filesystem if long output is expected) +# +# - Nothing useful is done with stdin +# +--- a/arch/um/drivers/mconsole.h ++++ b/arch/um/drivers/mconsole.h +@@ -85,6 +85,7 @@ extern void mconsole_cad(struct mc_reque + extern void mconsole_stop(struct mc_request *req); + extern void mconsole_go(struct mc_request *req); + extern void mconsole_log(struct mc_request *req); ++extern void mconsole_exec(struct mc_request *req); + extern void mconsole_proc(struct mc_request *req); + extern void mconsole_stack(struct mc_request *req); + +--- a/arch/um/drivers/mconsole_kern.c ++++ b/arch/um/drivers/mconsole_kern.c +@@ -4,6 +4,7 @@ + * Licensed under the GPL + */ + ++#include "linux/kmod.h" + #include <linux/console.h> + #include <linux/ctype.h> + #include <linux/string.h> +@@ -24,6 +25,7 @@ + #include <linux/fs.h> + #include <linux/mount.h> + #include <linux/file.h> ++#include <linux/completion.h> + #include <asm/uaccess.h> + #include <asm/switch_to.h> + +@@ -121,6 +123,59 @@ void mconsole_log(struct mc_request *req + mconsole_reply(req, "", 0, 0); + } + ++void mconsole_exec(struct mc_request *req) ++{ ++ struct subprocess_info *sub_info; ++ int res, len; ++ struct file *out; ++ char buf[MCONSOLE_MAX_DATA]; ++ ++ char *envp[] = { ++ "HOME=/", "TERM=linux", ++ "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin", ++ NULL ++ }; ++ char *argv[] = { ++ "/bin/sh", "-c", ++ req->request.data + strlen("exec "), ++ NULL ++ }; ++ ++ sub_info = call_usermodehelper_setup("/bin/sh", argv, envp, GFP_ATOMIC, NULL, NULL, NULL); ++ if (sub_info == NULL) { ++ mconsole_reply(req, "call_usermodehelper_setup failed", 1, 0); ++ return; ++ } ++ res = call_usermodehelper_stdoutpipe(sub_info, &out); ++ if (res < 0) { ++ kfree(sub_info); ++ mconsole_reply(req, "call_usermodehelper_stdoutpipe failed", 1, 0); ++ return; ++ } ++ ++ res = call_usermodehelper_exec(sub_info, UMH_WAIT_PROC); ++ if (res < 0) { ++ kfree(sub_info); ++ mconsole_reply(req, "call_usermodehelper_exec failed", 1, 0); ++ return; ++ } ++ ++ for (;;) { ++ len = out->f_op->read(out, buf, sizeof(buf), &out->f_pos); ++ if (len < 0) { ++ mconsole_reply(req, "reading output failed", 1, 0); ++ break; ++ } ++ if (len == 0) ++ break; ++ mconsole_reply_len(req, buf, len, 0, 1); ++ } ++ fput(out); ++ ++ mconsole_reply_len(req, NULL, 0, 0, 0); ++} ++ ++ + void mconsole_proc(struct mc_request *req) + { + struct vfsmount *mnt = task_active_pid_ns(current)->proc_mnt; +@@ -187,6 +242,7 @@ void mconsole_proc(struct mc_request *re + stop - pause the UML; it will do nothing until it receives a 'go' \n\ + go - continue the UML after a 'stop' \n\ + log <string> - make UML enter <string> into the kernel log\n\ ++ exec <string> - pass <string> to /bin/sh -c synchronously\n\ + proc <file> - returns the contents of the UML's /proc/<file>\n\ + stack <pid> - returns the stack of the specified pid\n\ + " +--- a/arch/um/drivers/mconsole_user.c ++++ b/arch/um/drivers/mconsole_user.c +@@ -30,6 +30,7 @@ static struct mconsole_command commands[ + { "stop", mconsole_stop, MCONSOLE_PROC }, + { "go", mconsole_go, MCONSOLE_INTR }, + { "log", mconsole_log, MCONSOLE_INTR }, ++ { "exec", mconsole_exec, MCONSOLE_PROC }, + { "proc", mconsole_proc, MCONSOLE_PROC }, + { "stack", mconsole_stack, MCONSOLE_INTR }, + }; +--- a/arch/um/os-Linux/file.c ++++ b/arch/um/os-Linux/file.c +@@ -534,6 +534,8 @@ int os_create_unix_socket(const char *fi + + addr.sun_family = AF_UNIX; + ++ if (len > sizeof(addr.sun_path)) ++ len = sizeof(addr.sun_path); + snprintf(addr.sun_path, len, "%s", file); + + err = bind(sock, (struct sockaddr *) &addr, sizeof(addr)); +--- a/include/linux/kmod.h ++++ b/include/linux/kmod.h +@@ -62,6 +62,7 @@ struct subprocess_info { + int wait; + int retval; + int (*init)(struct subprocess_info *info, struct cred *new); ++ struct file *stdout; + void (*cleanup)(struct subprocess_info *info); + void *data; + }; +@@ -104,4 +105,6 @@ extern int usermodehelper_read_trylock(v + extern long usermodehelper_read_lock_wait(long timeout); + extern void usermodehelper_read_unlock(void); + ++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info, struct file **filp); ++ + #endif /* __LINUX_KMOD_H__ */ +--- a/kernel/kmod.c ++++ b/kernel/kmod.c +@@ -39,6 +39,7 @@ + #include <linux/rwsem.h> + #include <linux/ptrace.h> + #include <linux/async.h> ++#include <linux/pipe_fs_i.h> + #include <asm/uaccess.h> + + #include <trace/events/module.h> +@@ -223,6 +224,28 @@ static int ____call_usermodehelper(void + flush_signal_handlers(current, 1); + spin_unlock_irq(¤t->sighand->siglock); + ++ /* Install output when needed */ ++ if (sub_info->stdout) { ++ struct files_struct *f = current->files; ++ struct fdtable *fdt; ++ ++ sys_close(1); ++ sys_close(2); ++ get_file(sub_info->stdout); ++ fd_install(1, sub_info->stdout); ++ fd_install(2, sub_info->stdout); ++ spin_lock(&f->file_lock); ++ fdt = files_fdtable(f); ++ __set_bit(1, fdt->open_fds); ++ __clear_bit(1, fdt->close_on_exec); ++ __set_bit(2, fdt->open_fds); ++ __clear_bit(2, fdt->close_on_exec); ++ spin_unlock(&f->file_lock); ++ ++ /* disallow core files */ ++ current->signal->rlim[RLIMIT_CORE] = (struct rlimit){0, 0}; ++ } ++ + /* We can run anywhere, unlike our parent keventd(). */ + set_cpus_allowed_ptr(current, cpu_all_mask); + +@@ -522,6 +545,20 @@ struct subprocess_info *call_usermodehel + } + EXPORT_SYMBOL(call_usermodehelper_setup); + ++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info, ++ struct file **filp) ++{ ++ struct file *f[2]; ++ ++ if (create_pipe_files(f, 0)<0) ++ return PTR_ERR(f); ++ sub_info->stdout = f[1]; ++ *filp = f[0]; ++ return 0; ++} ++EXPORT_SYMBOL(call_usermodehelper_stdoutpipe); ++ ++ + /** + * call_usermodehelper_exec - start a usermode application + * @sub_info: information about the subprocessa diff --git a/target/linux/uml/patches-4.1/102-pseudo-random-mac.patch b/target/linux/uml/patches-4.1/102-pseudo-random-mac.patch new file mode 100644 index 0000000..fc54f60 --- /dev/null +++ b/target/linux/uml/patches-4.1/102-pseudo-random-mac.patch @@ -0,0 +1,124 @@ +=============================================================================== + +This patch makes MAC addresses of network interfaces predictable. In +particular, it adds a small routine that computes MAC addresses of based on +a SHA1 hash of the virtual machine name and interface ID. + +TECHNICAL INFORMATION: + +Applies to vanilla kernel 3.9.4. + +=============================================================================== +--- a/arch/um/Kconfig.net ++++ b/arch/um/Kconfig.net +@@ -21,6 +21,19 @@ config UML_NET + enable at least one of the following transport options to actually + make use of UML networking. + ++config UML_NET_RANDOM_MAC ++ bool "Use random MAC addresses for network interfaces" ++ default n ++ depends on UML_NET ++ help ++ Virtual network devices inside a User-Mode Linux instance must be ++ assigned a MAC (Ethernet) address. If none is specified on the UML ++ command line, one must be automatically computed. If this option is ++ enabled, a randomly generated address is used. Otherwise, if this ++ option is disabled, the address is generated from a SHA1 hash of ++ the umid of the UML instance and the interface name. The latter choice ++ is useful to make MAC addresses predictable. ++ + config UML_NET_ETHERTAP + bool "Ethertap transport" + depends on UML_NET +--- a/arch/um/drivers/net_kern.c ++++ b/arch/um/drivers/net_kern.c +@@ -25,6 +25,13 @@ + #include <net_kern.h> + #include <net_user.h> + ++#include <crypto/sha.h> ++#include <linux/string.h> ++#include <linux/crypto.h> ++#include <linux/err.h> ++#include <linux/scatterlist.h> ++#include "os.h" ++ + #define DRIVER_NAME "uml-netdev" + + static DEFINE_SPINLOCK(opened_lock); +@@ -295,11 +302,47 @@ static void uml_net_user_timer_expire(un + #endif + } + ++#ifndef CONFIG_UML_NET_RANDOM_MAC ++ ++/* Compute a SHA1 hash of the UML instance's id and ++ * * an interface name. */ ++static int compute_hash(const char *umid, const char *ifname, char *hash) { ++ char vmif[1024]; ++ struct scatterlist sg; ++ struct crypto_hash *tfm; ++ struct hash_desc desc; ++ ++ strcpy (vmif, umid); ++ strcat (vmif, ifname); ++ ++ tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC); ++ if (IS_ERR(tfm)) ++ return 1; ++ ++ desc.tfm = tfm; ++ desc.flags = 0; ++ ++ sg_init_table(&sg, 1); ++ sg_set_buf(&sg, vmif, strlen(vmif)); ++ ++ if (crypto_hash_digest(&desc, &sg, strlen(vmif), hash)) { ++ crypto_free_hash(tfm); ++ return 1; ++ } ++ ++ crypto_free_hash(tfm); ++ ++ return 0; ++} ++ ++#endif ++ + static void setup_etheraddr(struct net_device *dev, char *str) + { + unsigned char *addr = dev->dev_addr; + char *end; + int i; ++ u8 hash[SHA1_DIGEST_SIZE]; + + if (str == NULL) + goto random; +@@ -340,9 +383,26 @@ static void setup_etheraddr(struct net_d + return; + + random: ++#ifdef CONFIG_UML_NET_RANDOM_MAC + printk(KERN_INFO + "Choosing a random ethernet address for device %s\n", dev->name); + eth_hw_addr_random(dev); ++#else ++ printk(KERN_INFO ++ "Computing a digest to use as ethernet address for device %s\n", dev->name); ++ if (compute_hash(get_umid(), dev->name, hash)) { ++ printk(KERN_WARNING ++ "Could not compute digest to use as ethernet address for device %s. " ++ "Using random address instead.\n", dev->name); ++ random_ether_addr(addr); ++ } ++ else { ++ for (i=0; i < 6; i++) ++ addr[i] = (hash[i] + hash[i+6]) % 0x100; ++ } ++ addr [0] &= 0xfe; /* clear multicast bit */ ++ addr [0] |= 0x02; /* set local assignment bit (IEEE802) */ ++#endif + } + + static DEFINE_SPINLOCK(devices_lock); |