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author | Anton Nefedov <anton.nefedov@virtuozzo.com> | 2018-02-14 19:09:19 +0300 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2018-03-02 18:39:07 +0100 |
commit | afe35cde6c2f3bdcee6e1f878836a64174fccb17 (patch) | |
tree | b4379f3f5d5d800e8b9f6a54042640d60ad85b3f /tests/qemu-iotests/033 | |
parent | 18a59f03c36214105477e9bbaed5a99355718d27 (diff) | |
download | qemu-afe35cde6c2f3bdcee6e1f878836a64174fccb17.zip qemu-afe35cde6c2f3bdcee6e1f878836a64174fccb17.tar.gz qemu-afe35cde6c2f3bdcee6e1f878836a64174fccb17.tar.bz2 |
iotest 033: add misaligned write-zeroes test via truncate
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>
Diffstat (limited to 'tests/qemu-iotests/033')
-rwxr-xr-x | tests/qemu-iotests/033 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/qemu-iotests/033 b/tests/qemu-iotests/033 index 2cdfd13..a1d8357 100755 --- a/tests/qemu-iotests/033 +++ b/tests/qemu-iotests/033 @@ -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 |