Btrfs: fix regression in scrub path resolving

In commit 4692cf58 we introduced new backref walking code for btrfs. This
assumes we're searching live roots, which requires a transaction context.
While scrubbing, however, we must not join a transaction because this could
deadlock with the commit path. Additionally, what scrub really wants to do
is resolving a logical address in the commit root it's currently checking.

This patch adds support for logical to path resolving on commit roots and
makes scrub use that.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 05446f77f99b..013c6371e3e8 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3067,8 +3067,8 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
                 goto out;
 
         extent_item_pos = loi->logical - key.objectid;
-        ret = iterate_extent_inodes(root->fs_info, path, key.objectid,
-                                        extent_item_pos, build_ino_list,
+        ret = iterate_extent_inodes(root->fs_info, key.objectid,
+                                        extent_item_pos, 0, build_ino_list,
                                         inodes);
 
         if (ret < 0)