This is needed for computing pathnames in the AppArmor LSM. Signed-off-by: Tony Jones Signed-off-by: Andreas Gruenbacher Signed-off-by: John Johansen --- fs/namei.c | 3 ++- include/linux/security.h | 16 +++++++++++----- security/dummy.c | 6 ++++-- security/security.c | 8 +++++--- security/selinux/hooks.c | 9 +++++++-- 5 files changed, 29 insertions(+), 13 deletions(-) --- a/fs/namei.c +++ b/fs/namei.c @@ -2486,7 +2486,8 @@ int vfs_link(struct dentry *old_dentry, if (S_ISDIR(old_dentry->d_inode->i_mode)) return -EPERM; - error = security_inode_link(old_dentry, dir, new_dentry); + error = security_inode_link(old_dentry, old_mnt, dir, new_dentry, + new_mnt); if (error) return error; --- a/include/linux/security.h +++ b/include/linux/security.h @@ -320,8 +320,10 @@ struct request_sock; * @inode_link: * Check permission before creating a new hard link to a file. * @old_dentry contains the dentry structure for an existing link to the file. + * @old_mnt is the vfsmount corresponding to @old_dentry (may be NULL). * @dir contains the inode structure of the parent directory of the new link. * @new_dentry contains the dentry structure for the new link. + * @new_mnt is the vfsmount corresponding to @new_dentry (may be NULL). * Return 0 if permission is granted. * @inode_unlink: * Check the permission to remove a hard link to a file. @@ -1280,8 +1282,9 @@ struct security_operations { char **name, void **value, size_t *len); int (*inode_create) (struct inode *dir, struct dentry *dentry, struct vfsmount *mnt, int mode); - int (*inode_link) (struct dentry *old_dentry, - struct inode *dir, struct dentry *new_dentry); + int (*inode_link) (struct dentry *old_dentry, struct vfsmount *old_mnt, + struct inode *dir, struct dentry *new_dentry, + struct vfsmount *new_mnt); int (*inode_unlink) (struct inode *dir, struct dentry *dentry); int (*inode_symlink) (struct inode *dir, struct dentry *dentry, struct vfsmount *mnt, const char *old_name); @@ -1546,8 +1549,9 @@ int security_inode_init_security(struct char **name, void **value, size_t *len); int security_inode_create(struct inode *dir, struct dentry *dentry, struct vfsmount *mnt, int mode); -int security_inode_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *new_dentry); +int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt, + struct inode *dir, struct dentry *new_dentry, + struct vfsmount *new_mnt); int security_inode_unlink(struct inode *dir, struct dentry *dentry); int security_inode_symlink(struct inode *dir, struct dentry *dentry, struct vfsmount *mnt, const char *old_name); @@ -1866,8 +1870,10 @@ static inline int security_inode_create } static inline int security_inode_link (struct dentry *old_dentry, + struct vfsmount *old_mnt, struct inode *dir, - struct dentry *new_dentry) + struct dentry *new_dentry, + struct vfsmount *new_mnt) { return 0; } --- a/security/dummy.c +++ b/security/dummy.c @@ -295,8 +295,10 @@ static int dummy_inode_create (struct in return 0; } -static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode, - struct dentry *new_dentry) +static int dummy_inode_link (struct dentry *old_dentry, + struct vfsmount *old_mnt, struct inode *inode, + struct dentry *new_dentry, + struct vfsmount *new_mnt) { return 0; } --- a/security/security.c +++ b/security/security.c @@ -356,12 +356,14 @@ int security_inode_create(struct inode * return security_ops->inode_create(dir, dentry, mnt, mode); } -int security_inode_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *new_dentry) +int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt, + struct inode *dir, struct dentry *new_dentry, + struct vfsmount *new_mnt) { if (unlikely(IS_PRIVATE(old_dentry->d_inode))) return 0; - return security_ops->inode_link(old_dentry, dir, new_dentry); + return security_ops->inode_link(old_dentry, old_mnt, dir, + new_dentry, new_mnt); } int security_inode_unlink(struct inode *dir, struct dentry *dentry) --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2417,11 +2417,16 @@ static int selinux_inode_create(struct i return may_create(dir, dentry, SECCLASS_FILE); } -static int selinux_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) +static int selinux_inode_link(struct dentry *old_dentry, + struct vfsmount *old_mnt, + struct inode *dir, + struct dentry *new_dentry, + struct vfsmount *new_mnt) { int rc; - rc = secondary_ops->inode_link(old_dentry,dir,new_dentry); + rc = secondary_ops->inode_link(old_dentry, old_mnt, dir, new_dentry, + new_mnt); if (rc) return rc; return may_link(dir, old_dentry, MAY_LINK); -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/