From a36dfa1ce0b98a3144be892ef6ada29deaf9dcf8 Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Fri, 29 Jun 2018 06:11:51 +0200 Subject: [PATCH 177/268] qcow2: Fix src_offset in copy offloading RH-Author: Fam Zheng Message-id: <20180629061153.12687-12-famz@redhat.com> Patchwork-id: 81163 O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH v2 11/13] qcow2: Fix src_offset in copy offloading Bugzilla: 1482537 RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Max Reitz RH-Acked-by: Kevin Wolf Not updating src_offset will result in wrong data being written to dst image. Reported-by: Max Reitz Signed-off-by: Fam Zheng Signed-off-by: Miroslav Rezanina --- block/qcow2.c | 1 + tests/qemu-iotests/063 | 9 +++++++++ tests/qemu-iotests/063.out | 12 ++++++++++++ 3 files changed, 22 insertions(+) diff --git a/block/qcow2.c b/block/qcow2.c index c85ebcb..4404dc7 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3416,6 +3416,7 @@ qcow2_co_copy_range_to(BlockDriverState *bs, } bytes -= cur_bytes; + src_offset += cur_bytes; dst_offset += cur_bytes; } ret = 0; diff --git a/tests/qemu-iotests/063 b/tests/qemu-iotests/063 index e4f6ea9..adc037c 100755 --- a/tests/qemu-iotests/063 +++ b/tests/qemu-iotests/063 @@ -91,6 +91,15 @@ if $QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n "$TEST_IMG.orig" "$TEST_IMG" >/dev exit 1 fi +echo "== Regression testing for copy offloading bug ==" + +_make_test_img 1M +TEST_IMG="$TEST_IMG.target" _make_test_img 1M +$QEMU_IO -c 'write -P 1 0 512k' -c 'write -P 2 512k 512k' "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c 'write -P 4 512k 512k' -c 'write -P 3 0 512k' "$TEST_IMG.target" | _filter_qemu_io +$QEMU_IMG convert -n -O $IMGFMT "$TEST_IMG" "$TEST_IMG.target" +$QEMU_IMG compare "$TEST_IMG" "$TEST_IMG.target" + echo "*** done" rm -f $seq.full status=0 diff --git a/tests/qemu-iotests/063.out b/tests/qemu-iotests/063.out index de1c99a..7b691b2 100644 --- a/tests/qemu-iotests/063.out +++ b/tests/qemu-iotests/063.out @@ -7,4 +7,16 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4194304 No errors were found on the image. == Testing conversion to a smaller file fails == Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2097152 +== Regression testing for copy offloading bug == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 +Formatting 'TEST_DIR/t.IMGFMT.target', fmt=IMGFMT size=1048576 +wrote 524288/524288 bytes at offset 0 +512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 524288/524288 bytes at offset 524288 +512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 524288/524288 bytes at offset 524288 +512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 524288/524288 bytes at offset 0 +512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Images are identical. *** done -- 1.8.3.1