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authorEric Blake <eblake@redhat.com>2016-05-25 21:48:48 -0600
committerKevin Wolf <kwolf@redhat.com>2016-06-08 10:21:08 +0200
commit31ad4fdf914e86a2ea105ff3687a0f4dfc4802cb (patch)
treebf833502e224e3f009d6bc15ca1eacf0da0b3ee0 /tests/qemu-iotests/154
parent5a64e9425160ace607b2043804d73d5579808bd3 (diff)
downloadqemu-31ad4fdf914e86a2ea105ff3687a0f4dfc4802cb.zip
qemu-iotests: Test one more spot for optimizing write_zeroes
Add another test to 154, showing that we currently allocate a data cluster in the top layer if any sector of the backing file was allocated. The next patch will optimize this case. Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/154')
-rwxr-xr-xtests/qemu-iotests/15440
1 files changed, 40 insertions, 0 deletions
diff --git a/tests/qemu-iotests/154 b/tests/qemu-iotests/154
index 23f1b3ab16..5905c55de9 100755
--- a/tests/qemu-iotests/154
+++ b/tests/qemu-iotests/154
@@ -115,6 +115,46 @@ $QEMU_IO -c "read -P 0 40k 3k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
echo
+echo == write_zeroes covers non-zero data ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# non-zero data at front of request
+# Backing file: -- XX -- --
+# Active layer: -- 00 00 --
+
+$QEMU_IO -c "write -P 0x11 5k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 5k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
+
+# non-zero data at end of request
+# Backing file: -- -- XX --
+# Active layer: -- 00 00 --
+
+$QEMU_IO -c "write -P 0x11 14k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 13k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 12k 4k" "$TEST_IMG" | _filter_qemu_io
+
+# non-zero data matches size of request
+# Backing file: -- XX XX --
+# Active layer: -- 00 00 --
+
+$QEMU_IO -c "write -P 0x11 21k 2k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 21k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 20k 4k" "$TEST_IMG" | _filter_qemu_io
+
+# non-zero data smaller than request
+# Backing file: -- -X X- --
+# Active layer: -- 00 00 --
+
+$QEMU_IO -c "write -P 0x11 30208 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 29k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 28k 4k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
echo == spanning two clusters, non-zero before request ==
CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size