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LSM: Add security_path_chroot().

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This patch allows pathname based LSM modules to check chroot() operations.

This hook is used by TOMOYO.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2009-10-04 21:49:48 +09:00 • committed by James Morris
parent 89eda06837
commit 8b8efb4403
4 changed files with 25 additions and 0 deletions
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11
include/linux/security.h
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@ -459,6 +459,10 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* @uid contains new owner's ID.
* @gid contains new group's ID.
* Return 0 if permission is granted.
* @path_chroot:
* Check for permission to change root directory.
* @path contains the path structure.
* Return 0 if permission is granted.
* @inode_readlink:
* Check the permission to read the symbolic link.
* @dentry contains the dentry structure for the file link.
@ -1503,6 +1507,7 @@ struct security_operations {
int (*path_chmod) (struct dentry *dentry, struct vfsmount *mnt,
mode_t mode);
int (*path_chown) (struct path *path, uid_t uid, gid_t gid);
int (*path_chroot) (struct path *path);
#endif
int (*inode_alloc_security) (struct inode *inode);
@ -2970,6 +2975,7 @@ int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt,
mode_t mode);
int security_path_chown(struct path *path, uid_t uid, gid_t gid);
int security_path_chroot(struct path *path);
#else /* CONFIG_SECURITY_PATH */
static inline int security_path_unlink(struct path *dir, struct dentry *dentry)
{
@ -3031,6 +3037,11 @@ static inline int security_path_chown(struct path *path, uid_t uid, gid_t gid)
{
return 0;
}
static inline int security_path_chroot(struct path *path)
{
return 0;
}
#endif /* CONFIG_SECURITY_PATH */
#ifdef CONFIG_KEYS