[PATCH 6/7] xfs: don't pick up IOLOCK during rmapbt repair scan

Darrick J. Wong
2024-04-10T00:49:05Z

From: Darrick J. Wong <djwong@kernel.org>

Now that we've fixed the directory operations to hold the ILOCK until
they're finished with rmapbt updates for directory shape changes, we no
longer need to take this lock when scanning directories for rmapbt
records.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/scrub/rmap_repair.c | 16 +---------------
1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/fs/xfs/scrub/rmap_repair.c b/fs/xfs/scrub/rmap_repair.c
index e8e07b683eab6..25acd69614c2c 100644
--- a/fs/xfs/scrub/rmap_repair.c
+++ b/fs/xfs/scrub/rmap_repair.c
@@ -578,23 +578,9 @@ xrep_rmap_scan_inode(
struct xrep_rmap *rr,
struct xfs_inode *ip)
{
- unsigned int lock_mode = 0;
+ unsigned int lock_mode = xrep_rmap_scan_ilock(ip);
int error;

- /*
- * Directory updates (create/link/unlink/rename) drop the directory's
- * ILOCK before finishing any rmapbt updates associated with directory
- * shape changes. For this scan to coordinate correctly with the live
- * update hook, we must take the only lock (i_rwsem) that is held all
- * the way to dir op completion. This will get fixed by the parent
- * pointer patchset.
- */
- if (S_ISDIR(VFS_I(ip)->i_mode)) {
- lock_mode = XFS_IOLOCK_SHARED;
- xfs_ilock(ip, lock_mode);
- }
- lock_mode |= xrep_rmap_scan_ilock(ip);
-
/* Check the data fork. */
error = xrep_rmap_scan_ifork(rr, ip, XFS_DATA_FORK);
if (error)