LSM: Remove unused arguments from security_path_truncate().

When commit be6d3e56a6b9b3a4ee44a0685e39e595073c6f0d "introduce new LSM hooks
where vfsmount is available." was proposed, regarding security_path_truncate(),
only "struct file *" argument (which AppArmor wanted to use) was removed.
But length and time_attrs arguments are not used by TOMOYO nor AppArmor.
Thus, let's remove these arguments.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: James Morris <jmorris@namei.org>

6 files changed, 10 insertions, 20 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 868d0cb9d473..fe34c2b879f4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1484,8 +1484,7 @@ static int handle_truncate(struct path *path)
          */
         error = locks_verify_locked(inode);
         if (!error)
-                error = security_path_truncate(path, 0,
-                                       ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
+                error = security_path_truncate(path);
         if (!error) {
                 error = do_truncate(path->dentry, 0,
                                     ATTR_MTIME|ATTR_CTIME|ATTR_OPEN,
diff --git a/fs/open.c b/fs/open.c
index 5463266db9e6..a54ed85209c1 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -110,7 +110,7 @@ static long do_sys_truncate(const char __user *pathname, loff_t length)
 
         error = locks_verify_truncate(inode, NULL, length);
         if (!error)
-                error = security_path_truncate(&path, length, 0);
+                error = security_path_truncate(&path);
         if (!error)
                 error = do_truncate(path.dentry, length, 0, NULL);
 
@@ -165,8 +165,7 @@ static long do_sys_ftruncate(unsigned int fd, loff_t length, int small)
 
         error = locks_verify_truncate(inode, file, length);
         if (!error)
-                error = security_path_truncate(&file->f_path, length,
-                                               ATTR_MTIME|ATTR_CTIME);
+                error = security_path_truncate(&file->f_path);
         if (!error)
                 error = do_truncate(dentry, length, ATTR_MTIME|ATTR_CTIME, file);
 out_putf:
diff --git a/include/linux/security.h b/include/linux/security.h
index 0c8819170463..723a93df756a 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -470,8 +470,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  * @path_truncate:
  *      Check permission before truncating a file.
  *      @path contains the path structure for the file.
- *      @length is the new length of the file.
- *      @time_attrs is the flags passed to do_truncate().
  *      Return 0 if permission is granted.
  * @inode_getattr:
  *      Check permission before obtaining file attributes.
@@ -1412,8 +1410,7 @@ struct security_operations {
         int (*path_rmdir) (struct path *dir, struct dentry *dentry);
         int (*path_mknod) (struct path *dir, struct dentry *dentry, int mode,
                            unsigned int dev);
-        int (*path_truncate) (struct path *path, loff_t length,
-                              unsigned int time_attrs);
+        int (*path_truncate) (struct path *path);
         int (*path_symlink) (struct path *dir, struct dentry *dentry,
                              const char *old_name);
         int (*path_link) (struct dentry *old_dentry, struct path *new_dir,
@@ -2806,8 +2803,7 @@ int security_path_mkdir(struct path *dir, struct dentry *dentry, int mode);
 int security_path_rmdir(struct path *dir, struct dentry *dentry);
 int security_path_mknod(struct path *dir, struct dentry *dentry, int mode,
                         unsigned int dev);
-int security_path_truncate(struct path *path, loff_t length,
-                           unsigned int time_attrs);
+int security_path_truncate(struct path *path);
 int security_path_symlink(struct path *dir, struct dentry *dentry,
                           const char *old_name);
 int security_path_link(struct dentry *old_dentry, struct path *new_dir,
@@ -2841,8 +2837,7 @@ static inline int security_path_mknod(struct path *dir, struct dentry *dentry,
         return 0;
 }
 
-static inline int security_path_truncate(struct path *path, loff_t length,
-                                         unsigned int time_attrs)
+static inline int security_path_truncate(struct path *path)
 {
         return 0;
 }
diff --git a/security/capability.c b/security/capability.c
index 8168e3ecd5bf..4aeb699da1b3 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -268,8 +268,7 @@ static int cap_path_rename(struct path *old_path, struct dentry *old_dentry,
         return 0;
 }
 
-static int cap_path_truncate(struct path *path, loff_t length,
-                             unsigned int time_attrs)
+static int cap_path_truncate(struct path *path)
 {
         return 0;
 }
diff --git a/security/security.c b/security/security.c
index 351942a4ca0e..e8c87b8601b4 100644
--- a/security/security.c
+++ b/security/security.c
@@ -417,12 +417,11 @@ int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
                                          new_dentry);
 }
 
-int security_path_truncate(struct path *path, loff_t length,
-                           unsigned int time_attrs)
+int security_path_truncate(struct path *path)
 {
         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
                 return 0;
-        return security_ops->path_truncate(path, length, time_attrs);
+        return security_ops->path_truncate(path);
 }
 
 int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt,
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index 57d442e7339b..7be732cadd47 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -93,8 +93,7 @@ static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
         return tomoyo_check_open_permission(domain, &bprm->file->f_path, O_RDONLY);
 }
 
-static int tomoyo_path_truncate(struct path *path, loff_t length,
-                                unsigned int time_attrs)
+static int tomoyo_path_truncate(struct path *path)
 {
         return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path);
 }