From: Nikolay Borisov Date: Thu, 14 Jul 2022 10:48:10 +0000 (+0300) Subject: btrfs: simplify error handling in btrfs_lookup_dentry X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fc8b235fdc090a000e164b49c3384802ea44c636;p=linux.git btrfs: simplify error handling in btrfs_lookup_dentry In btrfs_lookup_dentry releasing the reference of the sub_root and the running orphan cleanup should only happen if the dentry found actually represents a subvolume. This can only be true in the 'else' branch as otherwise either fixup_tree_root_location returned an ENOENT error, in which case sub_root wouldn't have been changed or if we got a different errno this means btrfs_get_fs_root couldn't have executed successfully again meaning sub_root will equal to root. So simplify all the branches by moving the code into the 'else'. Reviewed-by: Johannes Thumshirn Signed-off-by: Nikolay Borisov Reviewed-by: David Sterba Signed-off-by: David Sterba --- diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 16789bbacf75a..f20740812e5bf 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5866,14 +5866,14 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry) if (ret != -ENOENT) inode = ERR_PTR(ret); else - inode = new_simple_dir(dir->i_sb, &location, sub_root); + inode = new_simple_dir(dir->i_sb, &location, root); } else { inode = btrfs_iget(dir->i_sb, location.objectid, sub_root); - } - if (root != sub_root) btrfs_put_root(sub_root); - if (!IS_ERR(inode) && root != sub_root) { + if (IS_ERR(inode)) + return inode; + down_read(&fs_info->cleanup_work_sem); if (!sb_rdonly(inode->i_sb)) ret = btrfs_orphan_cleanup(sub_root);