[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-block] [PATCH v2 1/2] iotest 033: add misaligned write-zeroes test
From: |
Anton Nefedov |
Subject: |
[Qemu-block] [PATCH v2 1/2] iotest 033: add misaligned write-zeroes test via truncate |
Date: |
Mon, 12 Feb 2018 16:14:00 +0300 |
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 <address@hidden>
---
tests/qemu-iotests/033 | 28 ++++++++++++++++++++++++++++
tests/qemu-iotests/033.out | 13 +++++++++++++
2 files changed, 41 insertions(+)
diff --git a/tests/qemu-iotests/033 b/tests/qemu-iotests/033
index 2cdfd13..5fa3983 100755
--- a/tests/qemu-iotests/033
+++ b/tests/qemu-iotests/033
@@ -64,6 +64,9 @@ do_test()
} | $QEMU_IO $IO_EXTRA_ARGS
}
+echo
+echo "=== Test aligned and misaligned write zeroes operations ==="
+
for write_zero_cmd in "write -z" "aio_write -z"; do
for align in 512 4k; do
echo
@@ -102,7 +105,32 @@ for align in 512 4k; do
done
done
+
+# Trigger truncate that would shrink qcow2 L1 table, which is done by
+# clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes()
+
+echo
+echo "=== Test misaligned write zeroes via truncate ==="
+echo
+
+CLUSTER_SIZE=$((64 * 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 95929ef..57799cb 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=1073741824
+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 536870912
+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
--
2.7.4