Re: [PATCH 6/6] xfs/535: Fix test to execute in multi-block directory config
From: "Darrick J. Wong" <djwong@kernel.org>
Date: 2021-03-29 18:07:10
Also in:
fstests
On Thu, Mar 25, 2021 at 07:38:57PM +0530, Chandan Babu R wrote:
xfs/535 attempts to create $srcfile and $dstfile after reduce_max_iextents error tag is injected. Creation of these files fails when using a multi-block directory test configuration because, 1. A directory can have a pseudo maximum extent count of 10. 2. In the worst case a directory entry creation operation can consume (XFS_DA_NODE_MAXDEPTH + 1 + 1) * (Nr fs blocks in a single directory block) extents. With 1k fs block size and 4k directory block size, this evaluates to, (5 + 1 + 1) * 4 = 7 * 4 = 28 > 10 (Pseudo maximum inode extent count). This commit fixes the issue by creating $srcfile and $dstfile before injecting reduce_max_iextents error tag. Reported-by: Darrick J. Wong <djwong@kernel.org> Suggested-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <redacted>
Now on to the xfs/538 regressions! ;) Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D
quoted hunk ↗ jump to hunk
--- tests/xfs/535 | 11 +++++++++++ tests/xfs/535.out | 2 ++ 2 files changed, 13 insertions(+)diff --git a/tests/xfs/535 b/tests/xfs/535 index 2d82624c..f2a8a3a5 100755 --- a/tests/xfs/535 +++ b/tests/xfs/535@@ -51,6 +51,9 @@ nr_blks=15 srcfile=${SCRATCH_MNT}/srcfile dstfile=${SCRATCH_MNT}/dstfile +touch $srcfile +touch $dstfile + echo "Inject reduce_max_iextents error tag" _scratch_inject_error reduce_max_iextents 1@@ -77,10 +80,18 @@ if (( $nextents > 10 )); then exit 1 fi +echo "Disable reduce_max_iextents error tag" +_scratch_inject_error reduce_max_iextents 0 + rm $dstfile echo "* Funshare shared extent" +touch $dstfile + +echo "Inject reduce_max_iextents error tag" +_scratch_inject_error reduce_max_iextents 1 + echo "Share the extent with \$dstfile" _reflink $srcfile $dstfile >> $seqres.fulldiff --git a/tests/xfs/535.out b/tests/xfs/535.out index 4383e921..8f600272 100644 --- a/tests/xfs/535.out +++ b/tests/xfs/535.out@@ -6,7 +6,9 @@ Create a $srcfile having an extent of length 15 blocks Share the extent with $dstfile Buffered write to every other block of $dstfile's shared extent Verify $dstfile's extent count +Disable reduce_max_iextents error tag * Funshare shared extent +Inject reduce_max_iextents error tag Share the extent with $dstfile Funshare every other block of $dstfile's shared extent Verify $dstfile's extent count-- 2.29.2