From 3f5f2285bfcdd855508a55da7875fb92de1a6ed0 Mon Sep 17 00:00:00 2001 From: Andrey Drobyshev Date: Tue, 11 Jul 2023 20:25:53 +0300 Subject: [PATCH] tests/qemu-iotests/197: add testcase for CoR with subclusters Add testcase which checks that allocations during copy-on-read are performed on the subcluster basis when subclusters are enabled in target image. This testcase also triggers the following assert with previous commit not being applied, so we check that as well: qemu-io: ../block/io.c:1236: bdrv_co_do_copy_on_readv: Assertion `skip_bytes < pnum' failed. Reviewed-by: Eric Blake Reviewed-by: Denis V. Lunev Signed-off-by: Andrey Drobyshev Reviewed-by: Vladimir Sementsov-Ogievskiy Signed-off-by: Stefan Hajnoczi Message-ID: <20230711172553.234055-4-andrey.drobyshev@virtuozzo.com> --- tests/qemu-iotests/197 | 29 +++++++++++++++++++++++++++++ tests/qemu-iotests/197.out | 24 ++++++++++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/tests/qemu-iotests/197 b/tests/qemu-iotests/197 index a2547bc280ca4..f07a9da136a98 100755 --- a/tests/qemu-iotests/197 +++ b/tests/qemu-iotests/197 @@ -122,6 +122,35 @@ $QEMU_IO -f qcow2 -C -c 'read 0 1024' "$TEST_WRAP" | _filter_qemu_io $QEMU_IO -f qcow2 -c map "$TEST_WRAP" _check_test_img +echo +echo '=== Copy-on-read with subclusters ===' +echo + +# Create base and top images 64K (1 cluster) each. Make subclusters enabled +# for the top image +_make_test_img 64K +IMGPROTO=file IMGFMT=qcow2 TEST_IMG_FILE="$TEST_WRAP" \ + _make_test_img --no-opts -o extended_l2=true -F "$IMGFMT" -b "$TEST_IMG" \ + 64K | _filter_img_create + +$QEMU_IO -c "write -P 0xaa 0 64k" "$TEST_IMG" | _filter_qemu_io + +# Allocate individual subclusters in the top image, and not the whole cluster +$QEMU_IO -c "write -P 0xbb 28K 2K" -c "write -P 0xcc 34K 2K" "$TEST_WRAP" \ + | _filter_qemu_io + +# Only 2 subclusters should be allocated in the top image at this point +$QEMU_IMG map "$TEST_WRAP" | _filter_qemu_img_map + +# Actual copy-on-read operation +$QEMU_IO -C -c "read -P 0xaa 30K 4K" "$TEST_WRAP" | _filter_qemu_io + +# And here we should have 4 subclusters allocated right in the middle of the +# top image. Make sure the whole cluster remains unallocated +$QEMU_IMG map "$TEST_WRAP" | _filter_qemu_img_map + +_check_test_img + # success, all done echo '*** done' status=0 diff --git a/tests/qemu-iotests/197.out b/tests/qemu-iotests/197.out index ad414c3b0e8be..8f34a30afea63 100644 --- a/tests/qemu-iotests/197.out +++ b/tests/qemu-iotests/197.out @@ -31,4 +31,28 @@ read 1024/1024 bytes at offset 0 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 1 KiB (0x400) bytes allocated at offset 0 bytes (0x0) No errors were found on the image. + +=== Copy-on-read with subclusters === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536 +Formatting 'TEST_DIR/t.wrap.IMGFMT', fmt=IMGFMT size=65536 backing_file=TEST_DIR/t.IMGFMT backing_fmt=IMGFMT +wrote 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2048/2048 bytes at offset 28672 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2048/2048 bytes at offset 34816 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Offset Length File +0 0x7000 TEST_DIR/t.IMGFMT +0x7000 0x800 TEST_DIR/t.wrap.IMGFMT +0x7800 0x1000 TEST_DIR/t.IMGFMT +0x8800 0x800 TEST_DIR/t.wrap.IMGFMT +0x9000 0x7000 TEST_DIR/t.IMGFMT +read 4096/4096 bytes at offset 30720 +4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Offset Length File +0 0x7000 TEST_DIR/t.IMGFMT +0x7000 0x2000 TEST_DIR/t.wrap.IMGFMT +0x9000 0x7000 TEST_DIR/t.IMGFMT +No errors were found on the image. *** done