Commit 2106ccd9 authored by Tetsuo Handa's avatar Tetsuo Handa Committed by James Morris
Browse files

TOMOYO: Add mount restriction.



mount(2) has three string and one numeric parameters.
Split mount restriction code from security/tomoyo/file.c .
Signed-off-by: default avatarTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent a1f9bb6a
obj-y = common.o realpath.o tomoyo.o domain.o file.o gc.o path_group.o number_group.o
obj-y = common.o realpath.o tomoyo.o domain.o file.o gc.o path_group.o number_group.o mount.o
......@@ -1075,6 +1075,10 @@ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
if (perm & (1 << i))
count++;
break;
case TOMOYO_TYPE_MOUNT_ACL:
if (!container_of(ptr, struct tomoyo_mount_acl, head)->
is_deleted)
count++;
}
}
if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY))
......@@ -1576,6 +1580,8 @@ static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
domain->ignore_global_allow_read = !is_delete;
return 0;
}
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_MOUNT))
return tomoyo_write_mount_policy(data, domain, is_delete);
return tomoyo_write_file_policy(data, domain, is_delete);
}
......@@ -1720,6 +1726,30 @@ static bool tomoyo_print_path_number3_acl(struct tomoyo_io_buffer *head,
return false;
}
/**
* tomoyo_print_mount_acl - Print a mount ACL entry.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @ptr: Pointer to "struct tomoyo_mount_acl".
*
* Returns true on success, false otherwise.
*/
static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer *head,
struct tomoyo_mount_acl *ptr)
{
const int pos = head->read_avail;
if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_MOUNT) ||
!tomoyo_print_name_union(head, &ptr->dev_name) ||
!tomoyo_print_name_union(head, &ptr->dir_name) ||
!tomoyo_print_name_union(head, &ptr->fs_type) ||
!tomoyo_print_number_union(head, &ptr->flags) ||
!tomoyo_io_printf(head, "\n")) {
head->read_avail = pos;
return false;
}
return true;
}
/**
* tomoyo_print_entry - Print an ACL entry.
*
......@@ -1755,6 +1785,11 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
head);
return tomoyo_print_path_number3_acl(head, acl);
}
if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
struct tomoyo_mount_acl *acl
= container_of(ptr, struct tomoyo_mount_acl, head);
return tomoyo_print_mount_acl(head, acl);
}
BUG(); /* This must not happen. */
return false;
}
......
......@@ -53,6 +53,7 @@ enum tomoyo_mode_index {
/* Keywords for ACLs. */
#define TOMOYO_KEYWORD_ALIAS "alias "
#define TOMOYO_KEYWORD_ALLOW_MOUNT "allow_mount "
#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
#define TOMOYO_KEYWORD_DELETE "delete "
#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
......@@ -90,6 +91,7 @@ enum tomoyo_acl_entry_type_index {
TOMOYO_TYPE_PATH2_ACL,
TOMOYO_TYPE_PATH_NUMBER_ACL,
TOMOYO_TYPE_PATH_NUMBER3_ACL,
TOMOYO_TYPE_MOUNT_ACL,
};
/* Index numbers for File Controls. */
......@@ -116,7 +118,6 @@ enum tomoyo_path_acl_index {
TOMOYO_TYPE_SYMLINK,
TOMOYO_TYPE_REWRITE,
TOMOYO_TYPE_CHROOT,
TOMOYO_TYPE_MOUNT,
TOMOYO_TYPE_UMOUNT,
TOMOYO_MAX_PATH_OPERATION
};
......@@ -360,8 +361,8 @@ struct tomoyo_domain_info {
*
* Directives held by this structure are "allow_read/write", "allow_execute",
* "allow_read", "allow_write", "allow_unlink", "allow_rmdir",
* "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot",
* "allow_mount" and "allow_unmount".
* "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot" and
* "allow_unmount".
*/
struct tomoyo_path_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
......@@ -434,6 +435,29 @@ struct tomoyo_path2_acl {
struct tomoyo_name_union name2;
};
/*
* tomoyo_mount_acl is a structure which is used for holding an
* entry for mount operation.
* It has following fields.
*
* (1) "head" which is a "struct tomoyo_acl_info".
* (2) "is_deleted" is boolean.
* (3) "dev_name" is the device name.
* (4) "dir_name" is the mount point.
* (5) "flags" is the mount flags.
*
* Directives held by this structure are "allow_rename", "allow_link" and
* "allow_pivot_root".
*/
struct tomoyo_mount_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
bool is_deleted;
struct tomoyo_name_union dev_name;
struct tomoyo_name_union dir_name;
struct tomoyo_name_union fs_type;
struct tomoyo_number_union flags;
};
/*
* tomoyo_io_buffer is a structure which is used for reading and modifying
* configuration via /sys/kernel/security/tomoyo/ interface.
......@@ -638,6 +662,9 @@ struct tomoyo_policy_manager_entry {
/* Check whether the given name matches the given name_union. */
bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
const struct tomoyo_name_union *ptr);
/* Check whether the given number matches the given number_union. */
bool tomoyo_compare_number_union(const unsigned long value,
const struct tomoyo_number_union *ptr);
/* Check whether the domain has too many ACL entries to hold. */
bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
/* Transactional sprintf() for policy dump. */
......@@ -699,6 +726,12 @@ const char *tomoyo_path_number32keyword(const u8 operation);
const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain);
/* Convert single path operation to operation name. */
const char *tomoyo_path2keyword(const u8 operation);
/* Fill "struct tomoyo_request_info". */
int tomoyo_init_request_info(struct tomoyo_request_info *r,
struct tomoyo_domain_info *domain);
/* Check permission for mount operation. */
int tomoyo_mount_permission(char *dev_name, struct path *path, char *type,
unsigned long flags, void *data_page);
/* Create "alias" entry in exception policy. */
int tomoyo_write_alias_policy(char *data, const bool is_delete);
/*
......@@ -721,6 +754,9 @@ int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
const bool is_delete);
/* Create "allow_read" entry in exception policy. */
int tomoyo_write_globally_readable_policy(char *data, const bool is_delete);
/* Create "allow_mount" entry in domain policy. */
int tomoyo_write_mount_policy(char *data, struct tomoyo_domain_info *domain,
const bool is_delete);
/* Create "deny_rewrite" entry in exception policy. */
int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete);
/* Create "file_pattern" entry in exception policy. */
......@@ -735,7 +771,9 @@ struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
domainname,
const u8 profile);
/* Get patterned pathname. */
const struct tomoyo_path_info *
tomoyo_get_file_pattern(const struct tomoyo_path_info *filename);
/* Allocate memory for "struct tomoyo_path_group". */
struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name);
struct tomoyo_number_group *tomoyo_get_number_group(const char *group_name);
......@@ -972,6 +1010,16 @@ static inline bool tomoyo_is_same_path_number_acl
&& tomoyo_is_same_number_union(&p1->number, &p2->number);
}
static inline bool tomoyo_is_same_mount_acl(const struct tomoyo_mount_acl *p1,
const struct tomoyo_mount_acl *p2)
{
return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
tomoyo_is_same_name_union(&p1->dev_name, &p2->dev_name) &&
tomoyo_is_same_name_union(&p1->dir_name, &p2->dir_name) &&
tomoyo_is_same_name_union(&p1->fs_type, &p2->fs_type) &&
tomoyo_is_same_number_union(&p1->flags, &p2->flags);
}
static inline bool tomoyo_is_same_domain_initializer_entry
(const struct tomoyo_domain_initializer_entry *p1,
const struct tomoyo_domain_initializer_entry *p2)
......
......@@ -24,7 +24,6 @@ static const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
[TOMOYO_TYPE_SYMLINK] = "symlink",
[TOMOYO_TYPE_REWRITE] = "rewrite",
[TOMOYO_TYPE_CHROOT] = "chroot",
[TOMOYO_TYPE_MOUNT] = "mount",
[TOMOYO_TYPE_UMOUNT] = "unmount",
};
......@@ -108,8 +107,8 @@ bool tomoyo_compare_number_union(const unsigned long value,
*
* Returns mode.
*/
static int tomoyo_init_request_info(struct tomoyo_request_info *r,
struct tomoyo_domain_info *domain)
int tomoyo_init_request_info(struct tomoyo_request_info *r,
struct tomoyo_domain_info *domain)
{
memset(r, 0, sizeof(*r));
if (!domain)
......@@ -487,7 +486,7 @@ static int tomoyo_update_file_pattern_entry(const char *pattern,
*
* Caller holds tomoyo_read_lock().
*/
static const struct tomoyo_path_info *
const struct tomoyo_path_info *
tomoyo_get_file_pattern(const struct tomoyo_path_info *filename)
{
struct tomoyo_pattern_entry *ptr;
......@@ -1418,7 +1417,7 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
}
/**
* tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot", "mount" and "unmount".
* tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount".
*
* @operation: Type of operation.
* @path: Pointer to "struct path".
......
......@@ -124,6 +124,16 @@ static void tomoyo_del_acl(struct tomoyo_acl_info *acl)
tomoyo_put_number_union(&entry->minor);
}
break;
case TOMOYO_TYPE_MOUNT_ACL:
{
struct tomoyo_mount_acl *entry
= container_of(acl, typeof(*entry), head);
tomoyo_put_name_union(&entry->dev_name);
tomoyo_put_name_union(&entry->dir_name);
tomoyo_put_name_union(&entry->fs_type);
tomoyo_put_number_union(&entry->flags);
}
break;
default:
printk(KERN_WARNING "Unknown type\n");
break;
......
/*
* security/tomoyo/mount.c
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#include <linux/slab.h>
#include "common.h"
/* Keywords for mount restrictions. */
/* Allow to call 'mount --bind /source_dir /dest_dir' */
#define TOMOYO_MOUNT_BIND_KEYWORD "--bind"
/* Allow to call 'mount --move /old_dir /new_dir ' */
#define TOMOYO_MOUNT_MOVE_KEYWORD "--move"
/* Allow to call 'mount -o remount /dir ' */
#define TOMOYO_MOUNT_REMOUNT_KEYWORD "--remount"
/* Allow to call 'mount --make-unbindable /dir' */
#define TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD "--make-unbindable"
/* Allow to call 'mount --make-private /dir' */
#define TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD "--make-private"
/* Allow to call 'mount --make-slave /dir' */
#define TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD "--make-slave"
/* Allow to call 'mount --make-shared /dir' */
#define TOMOYO_MOUNT_MAKE_SHARED_KEYWORD "--make-shared"
/**
* tomoyo_encode2: Encode binary string to ascii string.
*
* @str: String in binary format.
*
* Returns pointer to @str in ascii format on success, NULL otherwise.
*
* This function uses kzalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
static char *tomoyo_encode2(const char *str)
{
int len = 0;
const char *p = str;
char *cp;
char *cp0;
if (!p)
return NULL;
while (*p) {
const unsigned char c = *p++;
if (c == '\\')
len += 2;
else if (c > ' ' && c < 127)
len++;
else
len += 4;
}
len++;
/* Reserve space for appending "/". */
cp = kzalloc(len + 10, GFP_NOFS);
if (!cp)
return NULL;
cp0 = cp;
p = str;
while (*p) {
const unsigned char c = *p++;
if (c == '\\') {
*cp++ = '\\';
*cp++ = '\\';
} else if (c > ' ' && c < 127) {
*cp++ = c;
} else {
*cp++ = '\\';
*cp++ = (c >> 6) + '0';
*cp++ = ((c >> 3) & 7) + '0';
*cp++ = (c & 7) + '0';
}
}
return cp0;
}
/**
* tomoyo_mount_acl2 - Check permission for mount() operation.
*
* @r: Pointer to "struct tomoyo_request_info".
* @dev_name: Name of device file.
* @dir: Pointer to "struct path".
* @type: Name of filesystem type.
* @flags: Mount options.
*
* Returns 0 on success, negative value otherwise.
*
* Caller holds tomoyo_read_lock().
*/
static int tomoyo_mount_acl2(struct tomoyo_request_info *r, char *dev_name,
struct path *dir, char *type, unsigned long flags)
{
struct path path;
struct tomoyo_acl_info *ptr;
struct file_system_type *fstype = NULL;
const char *requested_type = NULL;
const char *requested_dir_name = NULL;
const char *requested_dev_name = NULL;
struct tomoyo_path_info rtype;
struct tomoyo_path_info rdev;
struct tomoyo_path_info rdir;
int need_dev = 0;
int error = -ENOMEM;
/* Get fstype. */
requested_type = tomoyo_encode2(type);
if (!requested_type)
goto out;
rtype.name = requested_type;
tomoyo_fill_path_info(&rtype);
/* Get mount point. */
requested_dir_name = tomoyo_realpath_from_path(dir);
if (!requested_dir_name) {
error = -ENOMEM;
goto out;
}
rdir.name = requested_dir_name;
tomoyo_fill_path_info(&rdir);
/* Compare fs name. */
if (!strcmp(type, TOMOYO_MOUNT_REMOUNT_KEYWORD)) {
/* dev_name is ignored. */
} else if (!strcmp(type, TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD) ||
!strcmp(type, TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD) ||
!strcmp(type, TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD) ||
!strcmp(type, TOMOYO_MOUNT_MAKE_SHARED_KEYWORD)) {
/* dev_name is ignored. */
} else if (!strcmp(type, TOMOYO_MOUNT_BIND_KEYWORD) ||
!strcmp(type, TOMOYO_MOUNT_MOVE_KEYWORD)) {
need_dev = -1; /* dev_name is a directory */
} else {
fstype = get_fs_type(type);
if (!fstype) {
error = -ENODEV;
goto out;
}
if (fstype->fs_flags & FS_REQUIRES_DEV)
/* dev_name is a block device file. */
need_dev = 1;
}
if (need_dev) {
/* Get mount point or device file. */
if (kern_path(dev_name, LOOKUP_FOLLOW, &path)) {
error = -ENOENT;
goto out;
}
requested_dev_name = tomoyo_realpath_from_path(&path);
if (!requested_dev_name) {
error = -ENOENT;
goto out;
}
} else {
/* Map dev_name to "<NULL>" if no dev_name given. */
if (!dev_name)
dev_name = "<NULL>";
requested_dev_name = tomoyo_encode2(dev_name);
if (!requested_dev_name) {
error = -ENOMEM;
goto out;
}
}
rdev.name = requested_dev_name;
tomoyo_fill_path_info(&rdev);
list_for_each_entry_rcu(ptr, &r->domain->acl_info_list, list) {
struct tomoyo_mount_acl *acl;
if (ptr->type != TOMOYO_TYPE_MOUNT_ACL)
continue;
acl = container_of(ptr, struct tomoyo_mount_acl, head);
if (acl->is_deleted ||
!tomoyo_compare_number_union(flags, &acl->flags) ||
!tomoyo_compare_name_union(&rtype, &acl->fs_type) ||
!tomoyo_compare_name_union(&rdir, &acl->dir_name) ||
(need_dev &&
!tomoyo_compare_name_union(&rdev, &acl->dev_name)))
continue;
error = 0;
break;
}
if (error) {
const char *dev = tomoyo_get_file_pattern(&rdev)->name;
const char *dir = tomoyo_get_file_pattern(&rdir)->name;
int len = strlen(dev) + strlen(dir) + strlen(requested_type)
+ 64;
char *buf = kzalloc(len, GFP_NOFS);
if (buf) {
snprintf(buf, len - 1, "%s %s %s 0x%lX",
dev, dir, requested_type, flags);
tomoyo_write_mount_policy(buf, r->domain, false);
kfree(buf);
}
}
out:
kfree(requested_dev_name);
kfree(requested_dir_name);
if (fstype)
put_filesystem(fstype);
kfree(requested_type);
return error;
}
/**
* tomoyo_mount_acl - Check permission for mount() operation.
*
* @r: Pointer to "struct tomoyo_request_info".
* @dev_name: Name of device file.
* @dir: Pointer to "struct path".
* @type: Name of filesystem type.
* @flags: Mount options.
*
* Returns 0 on success, negative value otherwise.
*
* Caller holds tomoyo_read_lock().
*/
static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name,
struct path *dir, char *type, unsigned long flags)
{
int error;
error = -EPERM;
if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
flags &= ~MS_MGC_MSK;
switch (flags & (MS_REMOUNT | MS_MOVE | MS_BIND)) {
case MS_REMOUNT:
case MS_MOVE:
case MS_BIND:
case 0:
break;
default:
printk(KERN_WARNING "ERROR: "
"%s%s%sare given for single mount operation.\n",
flags & MS_REMOUNT ? "'remount' " : "",
flags & MS_MOVE ? "'move' " : "",
flags & MS_BIND ? "'bind' " : "");
return -EINVAL;
}
switch (flags & (MS_UNBINDABLE | MS_PRIVATE | MS_SLAVE | MS_SHARED)) {
case MS_UNBINDABLE:
case MS_PRIVATE:
case MS_SLAVE:
case MS_SHARED:
case 0:
break;
default:
printk(KERN_WARNING "ERROR: "
"%s%s%s%sare given for single mount operation.\n",
flags & MS_UNBINDABLE ? "'unbindable' " : "",
flags & MS_PRIVATE ? "'private' " : "",
flags & MS_SLAVE ? "'slave' " : "",
flags & MS_SHARED ? "'shared' " : "");
return -EINVAL;
}
if (flags & MS_REMOUNT)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_REMOUNT_KEYWORD,
flags & ~MS_REMOUNT);
else if (flags & MS_MOVE)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_MOVE_KEYWORD,
flags & ~MS_MOVE);
else if (flags & MS_BIND)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_BIND_KEYWORD,
flags & ~MS_BIND);
else if (flags & MS_UNBINDABLE)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD,
flags & ~MS_UNBINDABLE);
else if (flags & MS_PRIVATE)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD,
flags & ~MS_PRIVATE);
else if (flags & MS_SLAVE)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD,
flags & ~MS_SLAVE);
else if (flags & MS_SHARED)
error = tomoyo_mount_acl(r, dev_name, dir,
TOMOYO_MOUNT_MAKE_SHARED_KEYWORD,
flags & ~MS_SHARED);
else
error = tomoyo_mount_acl2(r, dev_name, dir, type, flags);
if (r->mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
return error;
}
/**
* tomoyo_mount_permission - Check permission for mount() operation.
*
* @dev_name: Name of device file.
* @path: Pointer to "struct path".
* @type: Name of filesystem type. May be NULL.
* @flags: Mount options.
* @data_page: Optional data. May be NULL.
*
* Returns 0 on success, negative value otherwise.
*/
int tomoyo_mount_permission(char *dev_name, struct path *path, char *type,
unsigned long flags, void *data_page)
{
struct tomoyo_request_info r;
int error;
int idx;
if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED)
return 0;
if (!type)
type = "<NULL>";
idx = tomoyo_read_lock();
error = tomoyo_mount_acl(&r, dev_name, path, type, flags);
tomoyo_read_unlock(idx);
return error;
}
/**
* tomoyo_write_mount_policy - Write "struct tomoyo_mount_acl" list.
*
* @data: String to parse.
* @domain: Pointer to "struct tomoyo_domain_info".
* @is_delete: True if it is a delete request.
*
* Returns 0 on success, negative value otherwise.
*/
int tomoyo_write_mount_policy(char *data, struct tomoyo_domain_info *domain,
const bool is_delete)
{
struct tomoyo_acl_info *ptr;
struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL };
int error = is_delete ? -ENOENT : -ENOMEM;
char *w[4];
if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[3][0])
return -EINVAL;
if (!tomoyo_parse_name_union(w[0], &e.dev_name) ||
!tomoyo_parse_name_union(w[1], &e.dir_name) ||
!tomoyo_parse_name_union(w[2], &e.fs_type) ||
!tomoyo_parse_number_union(w[3], &e.flags))
goto out;
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
struct tomoyo_mount_acl *acl =
container_of(ptr, struct tomoyo_mount_acl, head);
if (!tomoyo_is_same_mount_acl(acl, &e))
continue;
acl->is_deleted = is_delete;
error = 0;
break;
}
if (!is_delete && error) {
struct tomoyo_mount_acl *entry =
tomoyo_commit_ok(&e, sizeof(e));
if (entry) {
list_add_tail_rcu(&entry->head.list,
&domain->acl_info_list);
error = 0;
}
}
mutex_unlock(&tomoyo_policy_lock);
out:
tomoyo_put_name_union(&e.dev_name);
tomoyo_put_name_union(&e.dir_name);
tomoyo_put_name_union(&e.fs_type);
tomoyo_put_number_union(&e.flags);
return error;
}
......@@ -226,7 +226,7 @@ static int tomoyo_path_chroot(struct path *path)
static int tomoyo_sb_mount(char *dev_name, struct path *path,
char *type, unsigned long flags, void *data)
{
return tomoyo_path_perm(TOMOYO_TYPE_MOUNT, path);
return tomoyo_mount_permission(dev_name, path, type, flags, data);
}
static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
......
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