xfs: attr forks require attr, not attr2

Commit Message

Darrick J. Wong Aug. 5, 2024, 6:45 p.m. UTC

From: Darrick J. Wong <[e-mail]>

It turns out that I misunderstood the difference between the attr and
attr2 feature bits.  "attr" means that at some point an attr fork was
created somewhere in the filesystem.  "attr2" means that inodes have
variable-sized forks, but says nothing about whether or not there
actually /are/ attr forks in the system.

If we have an attr fork, we only need to check that attr is set.

Fixes: 99d9d8d05da26 ("xfs: scrub inode block mappings")
Signed-off-by: Darrick J. Wong <[e-mail]>
---
 fs/xfs/scrub/bmap.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Comments

Christoph Hellwig Aug. 6, 2024, 1:06 p.m. UTC | #1

Looks good:

Reviewed-by: Christoph Hellwig <[e-mail]>

Patch

diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index 24a15bf784f1..5ab2ac53c920 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -938,7 +938,13 @@  xchk_bmap(
 		}
 		break;
 	case XFS_ATTR_FORK:
-		if (!xfs_has_attr(mp) && !xfs_has_attr2(mp))
+		/*
+		 * "attr" means that an attr fork was created at some point in
+		 * the life of this filesystem.  "attr2" means that inodes have
+		 * variable-sized data/attr fork areas.  Hence we only check
+		 * attr here.
+		 */
+		if (!xfs_has_attr(mp))
 			xchk_ino_set_corrupt(sc, sc->ip->i_ino);
 		break;
 	default: