Btrfs: Add backrefs for symbolic link inodes

Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/inode.c

@@ -404,7 +404,6 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
 	ret = btrfs_delete_one_dir_name(trans, root, path, di);
 
 	dentry->d_inode->i_ctime = dir->i_ctime;
-	if (!S_ISLNK(dentry->d_inode->i_mode)) {
 	ret = btrfs_del_inode_ref(trans, root, name, name_len,
 				  dentry->d_inode->i_ino,
 				  dentry->d_parent->d_inode->i_ino);
@@ -414,7 +413,6 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
 		       dentry->d_inode->i_ino,
 		       dentry->d_parent->d_inode->i_ino);
 	}
-	}
 err:
 	btrfs_free_path(path);
 	if (!ret) {
@@ -1293,13 +1291,11 @@ static int btrfs_add_link(struct btrfs_trans_handle *trans,
 				    dentry->d_parent->d_inode->i_ino,
 				    &key, btrfs_inode_type(inode));
 	if (ret == 0) {
-		if (!S_ISLNK(inode->i_mode)) {
 		ret = btrfs_insert_inode_ref(trans, root,
 				     dentry->d_name.name,
 				     dentry->d_name.len,
 				     inode->i_ino,
 				     dentry->d_parent->d_inode->i_ino);
-		}
 		parent_inode = dentry->d_parent->d_inode;
 		parent_inode->i_size += dentry->d_name.len * 2;
 		parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;