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iotests: Test post-backing convert target behavior

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This adds a test case to 122 for what happens when you convert to a
target with a backing file that is shorter than the target, and the
image format does not support efficient zero writes (as is the case with
qcow2 v2).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180501165750.19242-3-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2018-05-01 18:57:50 +02:00
parent 351c8efff9
commit 0682854f89
2 changed files with 60 additions and 0 deletions
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18
tests/qemu-iotests/122.out
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@ -28,6 +28,24 @@ read 3145728/3145728 bytes at offset 0
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Converting to an overlay larger than its backing file ===
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=268435456
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=805306368 backing_file=TEST_DIR/t.IMGFMT.base
Offset Length File
wrote 1048576/1048576 bytes at offset 267386880
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1048576/1048576 bytes at offset 629145600
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Offset Length File
0xff00000 0x100000 TEST_DIR/t.IMGFMT.base
0x25800000 0x100000 TEST_DIR/t.IMGFMT.orig
read 1048576/1048576 bytes at offset 267386880
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 1048576/1048576 bytes at offset 629145600
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Concatenate multiple source images ===
Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=4194304