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iotest 033: add misaligned write-zeroes test via truncate

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This new test case only makes sense for qcow2 while iotest 033 is generic;
however it matches the test purpose perfectly and also 033 contains those
do_test() tricks to pass the alignment, which won't look nice being
duplicated in other tests or moved to the common code.

Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Anton Nefedov 2018-02-14 19:09:19 +03:00 committed by Kevin Wolf
parent 18a59f03c3
commit afe35cde6c
2 changed files with 42 additions and 0 deletions
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29
tests/qemu-iotests/033
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@ -64,6 +64,9 @@ do_test()
} | $QEMU_IO $IO_EXTRA_ARGS
}
echo
echo "=== Test aligned and misaligned write zeroes operations ==="
for write_zero_cmd in "write -z" "aio_write -z"; do
for align in 512 4k; do
echo
@ -102,7 +105,33 @@ for align in 512 4k; do
done
done
# Trigger truncate that would shrink qcow2 L1 table, which is done by
# clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes()
echo
echo "=== Test misaligned write zeroes via truncate ==="
echo
# any size will do, but the smaller the size the smaller the required image
CLUSTER_SIZE=$((4 * 1024))
L2_COVERAGE=$(($CLUSTER_SIZE * $CLUSTER_SIZE / 8))
_make_test_img $(($L2_COVERAGE * 2))
do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io
# next L2 table
do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io
# only interested in qcow2 here; also other formats might respond with
# "not supported" error message
if [ $IMGFMT = "qcow2" ]; then
do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io
fi
do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io
# success, all done
echo
echo "*** done"
rm -f $seq.full
status=0

13
tests/qemu-iotests/033.out
View File

@ -1,6 +1,8 @@
QA output created by 033
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
=== Test aligned and misaligned write zeroes operations ===
== preparing image ==
wrote 1024/1024 bytes at offset 512
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@ -164,4 +166,15 @@ read 512/512 bytes at offset 512
read 3072/3072 bytes at offset 1024
3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Test misaligned write zeroes via truncate ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4194304
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 512/512 bytes at offset 2097152
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
*** done