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[Qemu-devel] [PATCH 1/3] qcow2: Fix src_offset in copy offloading
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH 1/3] qcow2: Fix src_offset in copy offloading |
Date: |
Fri, 29 Jun 2018 14:03:26 +0800 |
Not updating src_offset will result in wrong data being written to dst
image.
Reported-by: Max Reitz <address@hidden>
Signed-off-by: Fam Zheng <address@hidden>
---
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 a3a3aa2a97..9d4e6e32e4 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3422,6 +3422,7 @@ 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 e4f6ea9385..adc037c1f5 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 de1c99afd8..7b691b2c9e 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
--
2.17.1