[PATCH v2] fstests: generic/353 should accomodate other pwrite behaviors

[Bill O'Donnell <bodonnel@redhat.com>]

xfs_io pwrite issues a series of block size writes, but there is no
guarantee that the resulting extent(s) will be singular or contiguous.
This behavior is acceptable, but the test is flawed in that it expects
a single extent for a pwrite.

Modify test to use actual blocksize for pwrite and reflink. Also
modify it to accommodate pwrite and reflink that produce different
mapping results.

Signed-off-by: Bill O'Donnell <bodonnel@redhat.com>
---
 tests/generic/353     | 29 ++++++++++++++++-------------
 tests/generic/353.out | 15 +--------------
 2 files changed, 17 insertions(+), 27 deletions(-)

diff --git a/tests/generic/353 b/tests/generic/353
index 9a1471bd..c5639725 100755
--- a/tests/generic/353
+++ b/tests/generic/353
@@ -29,31 +29,34 @@ _require_xfs_io_command "fiemap"
 _scratch_mkfs > /dev/null 2>&1
 _scratch_mount
 
-blocksize=64k
+blocksize=$(_get_file_block_size $SCRATCH_MNT)
+
 file1="$SCRATCH_MNT/file1"
 file2="$SCRATCH_MNT/file2"
+extmap1="$SCRATCH_MNT/extmap1"
+extmap2="$SCRATCH_MNT/extmap2"
 
 # write the initial file
-_pwrite_byte 0xcdcdcdcd 0 $blocksize $file1 | _filter_xfs_io
+_pwrite_byte 0xcdcdcdcd 0 $blocksize $file1 > /dev/null
 
 # reflink initial file
-_reflink_range $file1 0 $file2 0 $blocksize | _filter_xfs_io
+_reflink_range $file1 0 $file2 0 $blocksize > /dev/null
 
 # check their fiemap to make sure it's correct
-echo "before sync:"
-echo "$file1" | _filter_scratch
-$XFS_IO_PROG -c "fiemap -v" $file1 | _filter_fiemap_flags
-echo "$file2" | _filter_scratch
-$XFS_IO_PROG -c "fiemap -v" $file2 | _filter_fiemap_flags
+$XFS_IO_PROG -c "fiemap -v" $file1 | _filter_fiemap_flags > $extmap1
+$XFS_IO_PROG -c "fiemap -v" $file2 | _filter_fiemap_flags > $extmap2
+
+cmp -s $extmap1 $extmap2 || echo "mismatched extent maps before sync"
 
 # sync and recheck, to make sure the fiemap doesn't change just
 # due to sync
 sync
-echo "after sync:"
-echo "$file1" | _filter_scratch
-$XFS_IO_PROG -c "fiemap -v" $file1 | _filter_fiemap_flags
-echo "$file2" | _filter_scratch
-$XFS_IO_PROG -c "fiemap -v" $file2 | _filter_fiemap_flags
+$XFS_IO_PROG -c "fiemap -v" $file1 | _filter_fiemap_flags > $extmap1
+$XFS_IO_PROG -c "fiemap -v" $file2 | _filter_fiemap_flags > $extmap2
+
+cmp -s $extmap1 $extmap2 || echo "mismatched extent maps after sync"
+
+echo "Silence is golden"
 
 # success, all done
 status=0
diff --git a/tests/generic/353.out b/tests/generic/353.out
index 4f6e0b92..16ba4f1f 100644
--- a/tests/generic/353.out
+++ b/tests/generic/353.out
@@ -1,15 +1,2 @@
 QA output created by 353
-wrote 65536/65536 bytes at offset 0
-XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-linked 65536/65536 bytes at offset 0
-XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-before sync:
-SCRATCH_MNT/file1
-0: [0..127]: shared|last
-SCRATCH_MNT/file2
-0: [0..127]: shared|last
-after sync:
-SCRATCH_MNT/file1
-0: [0..127]: shared|last
-SCRATCH_MNT/file2
-0: [0..127]: shared|last
+Silence is golden
-- 
2.41.0