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xfs: don't load local xattr values during scrub

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Local extended attributes store their values within the same leaf block.
There's no header for the values themselves, nor are they separately
checksummed.  Hence we can save a bit of time in the attr scrubber by
not wasting time retrieving the values.

Regrettably, shortform attributes do not set XFS_ATTR_LOCAL so this
offers us no advantage there, but at least there are very few attrs in
that case.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2023-04-11 19:00:35 -07:00
parent 674f0d0dc6
commit 44af6c7e59
1 changed files with 8 additions and 0 deletions
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8
fs/xfs/scrub/attr.c
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@ -200,6 +200,14 @@ xchk_xattr_listent(
goto fail_xref;
}
/*
* Local xattr values are stored in the attr leaf block, so we don't
* need to retrieve the value from a remote block to detect corruption
* problems.
*/
if (flags & XFS_ATTR_LOCAL)
goto fail_xref;
/*
* Try to allocate enough memory to extrat the attr value. If that
* doesn't work, we overload the seen_enough variable to convey