vfs: remove unused i_op->rename

No in-tree uses remain.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Documentation/filesystems/Locking

@@ -50,8 +50,6 @@ prototypes:
 	int (*mkdir) (struct inode *,struct dentry *,umode_t);
 	int (*rmdir) (struct inode *,struct dentry *);
 	int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t);
-	int (*rename) (struct inode *, struct dentry *,
-			struct inode *, struct dentry *);
 	int (*rename2) (struct inode *, struct dentry *,
 			struct inode *, struct dentry *, unsigned int);
 	int (*readlink) (struct dentry *, char __user *,int);
@@ -83,7 +81,6 @@ symlink:	yes
 mkdir:		yes
 unlink:		yes (both)
 rmdir:		yes (both)	(see below)
-rename:		yes (all)	(see below)
 rename2:	yes (all)	(see below)
 readlink:	no
 get_link:	no
@@ -102,8 +99,7 @@ tmpfile:	no
 
 	Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
-	cross-directory ->rename() and rename2() has (per-superblock)
-->s_vfs_rename_sem.
+	cross-directory ->rename2() has (per-superblock) ->s_vfs_rename_sem.
 
 See Documentation/filesystems/directory-locking for more detailed discussion
 of the locking scheme for directory operations.

Documentation/filesystems/directory-locking

@@ -19,7 +19,7 @@ locks victim and calls the method.  Locks are exclusive.
 
 4) rename() that is _not_ cross-directory.  Locking rules: caller locks
 the parent and finds source and target.  In case of exchange (with
-RENAME_EXCHANGE in rename2() flags argument) lock both.  In any case,
+RENAME_EXCHANGE in flags argument) lock both.  In any case,
 if the target already exists, lock it.  If the source is a non-directory,
 lock it.  If we need to lock both, lock them in inode pointer order.
 Then call the method.  All locks are exclusive.

Documentation/filesystems/vfs.txt

@@ -345,8 +345,6 @@ struct inode_operations {
 	int (*mkdir) (struct inode *,struct dentry *,umode_t);
 	int (*rmdir) (struct inode *,struct dentry *);
 	int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t);
-	int (*rename) (struct inode *, struct dentry *,
-			struct inode *, struct dentry *);
 	int (*rename2) (struct inode *, struct dentry *,
 			struct inode *, struct dentry *, unsigned int);
 	int (*readlink) (struct dentry *, char __user *,int);
@@ -416,11 +414,8 @@ otherwise noted.
   rename: called by the rename(2) system call to rename the object to
 	have the parent and name given by the second inode and dentry.
 
-  rename2: this has an additional flags argument compared to rename.
-	If no flags are supported by the filesystem then this method
-	need not be implemented.  If some flags are supported then the
-	filesystem must return -EINVAL for any unsupported or unknown
-	flags.  Currently the following flags are implemented:
+	The filesystem must return -EINVAL for any unsupported or
+	unknown	flags.  Currently the following flags are implemented:
 	(1) RENAME_NOREPLACE: this flag indicates that if the target
 	of the rename exists the rename should fail with -EEXIST
 	instead of replacing the target.  The VFS already checks for

fs/cachefiles/namei.c

@@ -804,8 +804,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
 	    !d_backing_inode(subdir)->i_op->lookup ||
 	    !d_backing_inode(subdir)->i_op->mkdir ||
 	    !d_backing_inode(subdir)->i_op->create ||
-	    (!d_backing_inode(subdir)->i_op->rename &&
-	     !d_backing_inode(subdir)->i_op->rename2) ||
+	    !d_backing_inode(subdir)->i_op->rename2 ||
 	    !d_backing_inode(subdir)->i_op->rmdir ||
 	    !d_backing_inode(subdir)->i_op->unlink)
 		goto check_error;

fs/namei.c

@@ -4369,12 +4369,9 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	if (error)
 		return error;
 
-	if (!old_dir->i_op->rename && !old_dir->i_op->rename2)
+	if (!old_dir->i_op->rename2)
 		return -EPERM;
 
-	if (flags && !old_dir->i_op->rename2)
-		return -EINVAL;
-
 	/*
 	 * If we are going to change the parent - check write permissions,
 	 * we'll need to flip '..'.
@@ -4428,14 +4425,8 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		if (error)
 			goto out;
 	}
-	if (!old_dir->i_op->rename2) {
-		error = old_dir->i_op->rename(old_dir, old_dentry,
-					      new_dir, new_dentry);
-	} else {
-		WARN_ON(old_dir->i_op->rename != NULL);
-		error = old_dir->i_op->rename2(old_dir, old_dentry,
-					       new_dir, new_dentry, flags);
-	}
+	error = old_dir->i_op->rename2(old_dir, old_dentry,
+				       new_dir, new_dentry, flags);
 	if (error)
 		goto out;
 

include/linux/fs.h

@@ -1732,8 +1732,6 @@ struct inode_operations {
 	int (*mkdir) (struct inode *,struct dentry *,umode_t);
 	int (*rmdir) (struct inode *,struct dentry *);
 	int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t);
-	int (*rename) (struct inode *, struct dentry *,
-			struct inode *, struct dentry *);
 	int (*rename2) (struct inode *, struct dentry *,
 			struct inode *, struct dentry *, unsigned int);
 	int (*setattr) (struct dentry *, struct iattr *);

security/tomoyo/realpath.c

@@ -173,7 +173,7 @@ static char *tomoyo_get_local_path(struct dentry *dentry, char * const buffer,
 		 * Use filesystem name if filesystem does not support rename()
 		 * operation.
 		 */
-		if (!inode->i_op->rename && !inode->i_op->rename2)
+		if (!inode->i_op->rename2)
 			goto prepend_filesystem_name;
 	}
 	/* Prepend device name. */
@@ -283,7 +283,7 @@ char *tomoyo_realpath_from_path(const struct path *path)
 		 * or dentry without vfsmount.
 		 */
 		if (!path->mnt ||
-		    (!inode->i_op->rename && !inode->i_op->rename2))
+		    (!inode->i_op->rename2))
 			pos = tomoyo_get_local_path(path->dentry, buf,
 						    buf_len - 1);
 		/* Get absolute name for the rest. */