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xfs: don't catch dax+reflink inodes as corruption in verifier

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We don't yet support dax on reflinked files, but that is in the works.

Further, having the flag set does not automatically mean that the inode
is actually "in the CPU direct access state," which depends on several
other conditions in addition to the flag being set.

As such, we should not catch this as corruption in the verifier - simply
not actually enabling S_DAX on reflinked files is enough for now.

Fixes: 4f435ebe7d ("xfs: don't mix reflink and DAX mode for now")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
[darrick: fix the scrubber too]
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Eric Sandeen 2020-12-08 18:59:12 -08:00 committed by Darrick J. Wong
parent a5336d6bb2
commit 207ddc0ef4
2 changed files with 0 additions and 8 deletions
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4
fs/xfs/libxfs/xfs_inode_buf.c
View file

@ -547,10 +547,6 @@ xfs_dinode_verify(
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME))
return __this_address;
/* don't let reflink and dax mix */
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
return __this_address;
/* COW extent size hint validation */
fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
mode, flags, flags2);

4
fs/xfs/scrub/inode.c
View file

@ -185,10 +185,6 @@ xchk_inode_flags2(
if ((flags & XFS_DIFLAG_REALTIME) && (flags2 & XFS_DIFLAG2_REFLINK))
goto bad;
/* dax and reflink make no sense, currently */
if ((flags2 & XFS_DIFLAG2_DAX) && (flags2 & XFS_DIFLAG2_REFLINK))
goto bad;
/* no bigtime iflag without the bigtime feature */
if (xfs_dinode_has_bigtime(dip) &&
!xfs_sb_version_hasbigtime(&mp->m_sb))