diff options
| -rw-r--r-- | block/io.c | 10 | ||||
| -rwxr-xr-x | tests/qemu-iotests/028 | 19 | ||||
| -rw-r--r-- | tests/qemu-iotests/028.out | 11 | ||||
| -rwxr-xr-x | tests/qemu-iotests/197 | 8 | ||||
| -rw-r--r-- | tests/qemu-iotests/197.out | 2 |
5 files changed, 42 insertions, 8 deletions
@@ -1524,12 +1524,13 @@ static int coroutine_fn bdrv_aligned_preadv(BdrvChild *child, assert(num); ret = bdrv_driver_preadv(bs, offset + bytes - bytes_remaining, - num, qiov, bytes - bytes_remaining, 0); + num, qiov, + qiov_offset + bytes - bytes_remaining, 0); max_bytes -= num; } else { num = bytes_remaining; - ret = qemu_iovec_memset(qiov, bytes - bytes_remaining, 0, - bytes_remaining); + ret = qemu_iovec_memset(qiov, qiov_offset + bytes - bytes_remaining, + 0, bytes_remaining); } if (ret < 0) { goto out; @@ -2032,7 +2033,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child, } ret = bdrv_driver_pwritev(bs, offset + bytes - bytes_remaining, - num, qiov, bytes - bytes_remaining, + num, qiov, + qiov_offset + bytes - bytes_remaining, local_flags); if (ret < 0) { break; diff --git a/tests/qemu-iotests/028 b/tests/qemu-iotests/028 index 5d043ce..6dd3ae0 100755 --- a/tests/qemu-iotests/028 +++ b/tests/qemu-iotests/028 @@ -142,6 +142,25 @@ TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 _check_test_img +echo +echo '=== Reading across backing EOF in one operation ===' +echo + +# Use a cluster boundary as the base end here +base_size=$((3 * 1024 * 1024 * 1024)) + +TEST_IMG="$TEST_IMG.base" _make_test_img $base_size +_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size + +# Write 16 times 42 at the end of the base image +$QEMU_IO -c "write -P 42 $((base_size - 16)) 16" "$TEST_IMG.base" \ + | _filter_qemu_io + +# Read 32 bytes across the base EOF from the top; +# should be 16 times 0x2a, then 16 times 0x00 +$QEMU_IO -c "read -v $((base_size - 16)) 32" "$TEST_IMG" \ + | _filter_qemu_io + # success, all done echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/028.out b/tests/qemu-iotests/028.out index 12f82c6..5a68de5 100644 --- a/tests/qemu-iotests/028.out +++ b/tests/qemu-iotests/028.out @@ -730,4 +730,15 @@ read 512/512 bytes at offset 3221257728 read 512/512 bytes at offset 3221258752 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) No errors were found on the image. + +=== Reading across backing EOF in one operation === + +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=3221225472 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4294968832 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT +wrote 16/16 bytes at offset 3221225456 +16 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +bffffff0: 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a ................ +c0000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ +read 32/32 bytes at offset 3221225456 +32 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) *** done diff --git a/tests/qemu-iotests/197 b/tests/qemu-iotests/197 index 121959a..a161c89 100755 --- a/tests/qemu-iotests/197 +++ b/tests/qemu-iotests/197 @@ -114,9 +114,11 @@ echo # Force compat=1.1, because writing zeroes on a v2 image without a # backing file would just result in an unallocated cluster -_make_test_img -o compat=1.1 1024 -$QEMU_IO -f $IMGFMT -C -c 'read 0 1024' "$TEST_IMG" | _filter_qemu_io -$QEMU_IO -f $IMGFMT -c map "$TEST_IMG" +# (Also, note that this is really a pure qcow2 test.) +IMGPROTO=file IMGFMT=qcow2 TEST_IMG_FILE="$TEST_WRAP" \ + _make_test_img --no-opts -o compat=1.1 1024 +$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 # success, all done diff --git a/tests/qemu-iotests/197.out b/tests/qemu-iotests/197.out index 7ca46be..ad414c3 100644 --- a/tests/qemu-iotests/197.out +++ b/tests/qemu-iotests/197.out @@ -26,7 +26,7 @@ Images are identical. === Partial final cluster === -Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1024 +Formatting 'TEST_DIR/t.wrap.IMGFMT', fmt=IMGFMT size=1024 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) |