fs/affs: add rename2 to prepare multiple methods

Currently AFFS only supports RENAME_NOREPLACE.
This patch isolates that method to a static function to
prepare RENAME_EXCHANGE addition.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/affs/affs.h

@@ -173,7 +173,7 @@ extern int	affs_link(struct dentry *olddentry, struct inode *dir,
 			  struct dentry *dentry);
 extern int	affs_symlink(struct inode *dir, struct dentry *dentry,
 			     const char *symname);
-extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
+extern int	affs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 			    struct inode *new_dir, struct dentry *new_dentry,
 			    unsigned int flags);
 

fs/affs/dir.c

@@ -35,7 +35,7 @@ const struct inode_operations affs_dir_inode_operations = {
 	.symlink	= affs_symlink,
 	.mkdir		= affs_mkdir,
 	.rmdir		= affs_rmdir,
-	.rename		= affs_rename,
+	.rename		= affs_rename2,
 	.setattr	= affs_notify_change,
 };
 

fs/affs/namei.c

@@ -394,21 +394,14 @@ affs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
 	return affs_add_entry(dir, inode, dentry, ST_LINKFILE);
 }
 
-int
+static int
 affs_rename(struct inode *old_dir, struct dentry *old_dentry,
-	    struct inode *new_dir, struct dentry *new_dentry,
-	    unsigned int flags)
+	    struct inode *new_dir, struct dentry *new_dentry)
 {
 	struct super_block *sb = old_dir->i_sb;
 	struct buffer_head *bh = NULL;
 	int retval;
 
-	if (flags & ~RENAME_NOREPLACE)
-		return -EINVAL;
-
-	pr_debug("%s(old=%lu,\"%pd\" to new=%lu,\"%pd\")\n", __func__,
-		 old_dir->i_ino, old_dentry, new_dir->i_ino, new_dentry);
-
 	retval = affs_check_name(new_dentry->d_name.name,
 				 new_dentry->d_name.len,
 				 affs_nofilenametruncate(old_dentry));
@@ -448,6 +441,20 @@ done:
 	return retval;
 }
 
+int affs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry,
+			unsigned int flags)
+{
+
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
+
+	pr_debug("%s(old=%lu,\"%pd\" to new=%lu,\"%pd\")\n", __func__,
+		 old_dir->i_ino, old_dentry, new_dir->i_ino, new_dentry);
+
+	return affs_rename(old_dir, old_dentry, new_dir, new_dentry);
+}
+
 static struct dentry *affs_get_parent(struct dentry *child)
 {
 	struct inode *parent;