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iotests: Use convert -n in some cases 

qemu-img convert (without -n) can often be replaced by a combination of
_make_test_img + qemu-img convert -n.  Doing so allows converting to
protocols that do not allow direct file creation, such as FUSE exports.
The only problem is that for formats other than qcow2 and qed (qcow1 at
least), this may lead to high disk usage for some reason, so we cannot
do it everywhere.

But we can do it in 028 and 089, so let us do that so they can run on
FUSE exports.  Also, in 028 this allows us to remove a 9-line comment
that used to explain why we cannot safely filter drive-backup's image
creation output.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20201027190600.192171-10-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2020-10-27 20:05:49 +01:00 committed by Kevin Wolf
parent d81fe252a2
commit 620a628db0
4 changed files with 10 additions and 11 deletions
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14
tests/qemu-iotests/028
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@ -116,16 +116,10 @@ else
QEMU_COMM_TIMEOUT=1
fi
# Silence output since it contains the disk image path and QEMU's readline
# character echoing makes it very hard to filter the output. Plus, there
# is no telling how many times the command will repeat before succeeding.
# (Note that creating the image results in a "Formatting..." message over
# stdout, which is the same channel the monitor uses. We cannot reliably
# wait for it because the monitor output may interact with it in such a
# way that _timed_wait_for cannot read it. However, once the block job is
# done, we know that the "Formatting..." message must have appeared
# already, so the output is still deterministic.)
silent=y _send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
TEST_IMG="$TEST_IMG.copy" _make_test_img $image_size
_send_qemu_cmd $h "drive_backup -n disk ${TEST_IMG}.copy" "(qemu)" \
| _filter_imgfmt
silent=y qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
_send_qemu_cmd $h "info block-jobs" "No active jobs"
_send_qemu_cmd $h 'quit' ""

3
tests/qemu-iotests/028.out
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@ -468,6 +468,9 @@ No errors were found on the image.
block-backup
Formatting 'TEST_DIR/t.IMGFMT.copy', fmt=IMGFMT size=4294968832
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) drive_backup -n disk TEST_DIR/t.IMGFMT.copy
(qemu) info block-jobs
No active jobs
=== IO: pattern 195

3
tests/qemu-iotests/089
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@ -62,7 +62,8 @@ TEST_IMG="$TEST_IMG.base" _make_test_img $IMG_SIZE
$QEMU_IO -c 'write -P 42 0 512' -c 'write -P 23 512 512' \
-c 'write -P 66 1024 512' "$TEST_IMG.base" | _filter_qemu_io
$QEMU_IMG convert -f raw -O $IMGFMT "$TEST_IMG.base" "$TEST_IMG"
_make_test_img $IMG_SIZE
$QEMU_IMG convert -f raw -O $IMGFMT -n "$TEST_IMG.base" "$TEST_IMG"
$QEMU_IO_PROG --cache $CACHEMODE --aio $AIOMODE \
-c 'read -P 42 0 512' -c 'read -P 23 512 512' \

1
tests/qemu-iotests/089.out
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@ -9,6 +9,7 @@ wrote 512/512 bytes at offset 512
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 512/512 bytes at offset 1024
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
read 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 512/512 bytes at offset 512