From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52929) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1erpqW-0001ec-Gt for qemu-devel@nongnu.org; Fri, 02 Mar 2018 13:55:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1erpqV-00036U-IX for qemu-devel@nongnu.org; Fri, 02 Mar 2018 13:55:56 -0500 From: Kevin Wolf Date: Fri, 2 Mar 2018 19:54:34 +0100 Message-Id: <20180302185448.6314-24-kwolf@redhat.com> In-Reply-To: <20180302185448.6314-1-kwolf@redhat.com> References: <20180302185448.6314-1-kwolf@redhat.com> Subject: [Qemu-devel] [PULL 23/37] iotest 033: add misaligned write-zeroes test via truncate List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org From: Anton Nefedov 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 Signed-off-by: Kevin Wolf --- tests/qemu-iotests/033 | 29 +++++++++++++++++++++++++++++ tests/qemu-iotests/033.out | 13 +++++++++++++ 2 files changed, 42 insertions(+) diff --git a/tests/qemu-iotests/033 b/tests/qemu-iotests/033 index 2cdfd1397a..a1d8357331 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 diff --git a/tests/qemu-iotests/033.out b/tests/qemu-iotests/033.out index 95929eff70..9683f6b290 100644 --- a/tests/qemu-iotests/033.out +++ b/tests/qemu-iotests/033.out @@ -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 -- 2.13.6