[PATCH] xfs/420: only check the extent layout after syncing

[Christoph Hellwig <hch@lst.de>]

This tests validates the correct extent layout for some hairy reflink
related issues.  But until we called sync or fsync we have no gurantee
of any data fork layout, as only writeback moves the extents from the
COW for to the data fork.

The comparism pass before the sync might see an "error" if we use COW
fork speculative preallocations for non-overwrites, which is useful to
reduce fragmentation.

Just remove the pass of comparisms before the sync, as the one after
the sync will catch all persistent issues.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 tests/xfs/420     | 14 --------------
 tests/xfs/420.out | 14 --------------
 2 files changed, 28 deletions(-)

diff --git a/tests/xfs/420 b/tests/xfs/420
index a083a12b..0d611fd6 100755
--- a/tests/xfs/420
+++ b/tests/xfs/420
@@ -93,20 +93,6 @@ $XFS_IO_PROG -c "pwrite -S 0x63 $((blksz * 3)) $blksz" $testdir/file2 >> $seqres
 $XFS_IO_PROG -c "pwrite -S 0x63 0 $blksz" $testdir/file3 >> $seqres.full
 $XFS_IO_PROG -c "pwrite -S 0x63 $((blksz * 3)) $blksz" $testdir/file3 >> $seqres.full
 
-$XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file1 >> $seqres.full 2>&1
-$XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file2 >> $seqres.full 2>&1
-$XFS_IO_PROG -c "bmap -ev" -c "bmap -cv" $testdir/file3 >> $seqres.full 2>&1
-
-echo "Seek holes and data in file1"
-$XFS_IO_PROG -c "seek -a -r 0" $testdir/file1
-echo "Seek holes and data in file2"
-$XFS_IO_PROG -c "seek -a -r 0" $testdir/file2
-
-echo "Compare files"
-md5sum $testdir/file1 | _filter_scratch
-md5sum $testdir/file2 | _filter_scratch
-md5sum $testdir/file3 | _filter_scratch
-
 echo "sync filesystem" | tee -a $seqres.full
 sync
 
diff --git a/tests/xfs/420.out b/tests/xfs/420.out
index d1b5483a..39360741 100644
--- a/tests/xfs/420.out
+++ b/tests/xfs/420.out
@@ -6,20 +6,6 @@ c2803804acc9936eef8aab42c119bfac  SCRATCH_MNT/test-420/file1
 c2803804acc9936eef8aab42c119bfac  SCRATCH_MNT/test-420/file2
 c2803804acc9936eef8aab42c119bfac  SCRATCH_MNT/test-420/file3
 CoW the shared part then write into the empty part
-Seek holes and data in file1
-Whence	Result
-DATA	0
-HOLE	131072
-Seek holes and data in file2
-Whence	Result
-DATA	0
-HOLE	131072
-DATA	196608
-HOLE	262144
-Compare files
-c2803804acc9936eef8aab42c119bfac  SCRATCH_MNT/test-420/file1
-017c08a9320aad844ce86aa9631afb98  SCRATCH_MNT/test-420/file2
-017c08a9320aad844ce86aa9631afb98  SCRATCH_MNT/test-420/file3
 sync filesystem
 Seek holes and data in file1
 Whence	Result
-- 
2.20.1