Commit afe35cde authored by Anton Nefedov's avatar Anton Nefedov Committed by Kevin Wolf
Browse files

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: default avatarAnton Nefedov <anton.nefedov@virtuozzo.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 18a59f03

tests/qemu-iotests/033

+29 −0
Original line number Diff line number Diff line
@@ -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

tests/qemu-iotests/033.out

+13 −0
Original line number Diff line number Diff line 
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