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authorDarrick J. Wong <darrick.wong@oracle.com>2020-11-19 15:17:50 -0800
committerDarrick J. Wong <darrick.wong@oracle.com>2020-11-19 15:17:50 -0800
commiteb8409071a1d47e3593cfe077107ac46853182ab (patch)
tree300ec60cd9ad8fbf93fda120d3fb3e5b10b1e43e
parent883a790a84401f6f55992887fd7263d808d4d05d (diff)
downloadlinux-stericsson-eb8409071a1d47e3593cfe077107ac46853182ab.tar.gz
xfs: revert "xfs: fix rmap key and record comparison functions"
This reverts commit 6ff646b2ceb0eec916101877f38da0b73e3a5b7f. Your maintainer committed a major braino in the rmap code by adding the attr fork, bmbt, and unwritten extent usage bits into rmap record key comparisons. While XFS uses the usage bits *in the rmap records* for cross-referencing metadata in xfs_scrub and xfs_repair, it only needs the owner and offset information to distinguish between reverse mappings of the same physical extent into the data fork of a file at multiple offsets. The other bits are not important for key comparisons for index lookups, and never have been. Eric Sandeen reports that this causes regressions in generic/299, so undo this patch before it does more damage. Reported-by: Eric Sandeen <sandeen@sandeen.net> Fixes: 6ff646b2ceb0 ("xfs: fix rmap key and record comparison functions") Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com>
-rw-r--r--fs/xfs/libxfs/xfs_rmap_btree.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c
index 577a66381327..beb81c84a937 100644
--- a/fs/xfs/libxfs/xfs_rmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rmap_btree.c
@@ -243,8 +243,8 @@ xfs_rmapbt_key_diff(
else if (y > x)
return -1;
- x = be64_to_cpu(kp->rm_offset);
- y = xfs_rmap_irec_offset_pack(rec);
+ x = XFS_RMAP_OFF(be64_to_cpu(kp->rm_offset));
+ y = rec->rm_offset;
if (x > y)
return 1;
else if (y > x)
@@ -275,8 +275,8 @@ xfs_rmapbt_diff_two_keys(
else if (y > x)
return -1;
- x = be64_to_cpu(kp1->rm_offset);
- y = be64_to_cpu(kp2->rm_offset);
+ x = XFS_RMAP_OFF(be64_to_cpu(kp1->rm_offset));
+ y = XFS_RMAP_OFF(be64_to_cpu(kp2->rm_offset));
if (x > y)
return 1;
else if (y > x)
@@ -390,8 +390,8 @@ xfs_rmapbt_keys_inorder(
return 1;
else if (a > b)
return 0;
- a = be64_to_cpu(k1->rmap.rm_offset);
- b = be64_to_cpu(k2->rmap.rm_offset);
+ a = XFS_RMAP_OFF(be64_to_cpu(k1->rmap.rm_offset));
+ b = XFS_RMAP_OFF(be64_to_cpu(k2->rmap.rm_offset));
if (a <= b)
return 1;
return 0;
@@ -420,8 +420,8 @@ xfs_rmapbt_recs_inorder(
return 1;
else if (a > b)
return 0;
- a = be64_to_cpu(r1->rmap.rm_offset);
- b = be64_to_cpu(r2->rmap.rm_offset);
+ a = XFS_RMAP_OFF(be64_to_cpu(r1->rmap.rm_offset));
+ b = XFS_RMAP_OFF(be64_to_cpu(r2->rmap.rm_offset));
if (a <= b)
return 1;
return 0;