2012-04-12 17:28:12 +04:00
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QA output created by 034
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== creating backing file for COW tests ==
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2015-12-22 05:49:16 +03:00
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
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2012-04-12 17:28:12 +04:00
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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iotests: Specify explicit backing format where sensible
There are many existing qcow2 images that specify a backing file but
no format. This has been the source of CVEs in the past, but has
become more prominent of a problem now that libvirt has switched to
-blockdev. With older -drive, at least the probing was always done by
qemu (so the only risk of a changed format between successive boots of
a guest was if qemu was upgraded and probed differently). But with
newer -blockdev, libvirt must specify a format; if libvirt guesses raw
where the image was formatted, this results in data corruption visible
to the guest; conversely, if libvirt guesses qcow2 where qemu was
using raw, this can result in potential security holes, so modern
libvirt instead refuses to use images without explicit backing format.
The change in libvirt to reject images without explicit backing format
has pointed out that a number of tools have been far too reliant on
probing in the past. It's time to set a better example in our own
iotests of properly setting this parameter.
iotest calls to create, rebase, and convert are all impacted to some
degree. It's a bit annoying that we are inconsistent on command line
- while all of those accept -o backing_file=...,backing_fmt=..., the
shortcuts are different: create and rebase have -b and -F, while
convert has -B but no -F. (amend has no shortcuts, but the previous
patch just deprecated the use of amend to change backing chains).
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200706203954.341758-9-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 23:39:52 +03:00
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=6442450944 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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2012-04-12 17:28:12 +04:00
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== zero write with backing file ==
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wrote 196608/196608 bytes at offset 65536
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192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 13312/13312 bytes at offset 525312
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13 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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No errors were found on the image.
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== verifying patterns (3) ==
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read 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 196608/196608 bytes at offset 65536
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192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 263168/263168 bytes at offset 262144
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257 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 13312/13312 bytes at offset 525312
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13 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 509952/509952 bytes at offset 538624
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498 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== overwriting zero cluster ==
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wrote 8192/8192 bytes at offset 61440
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 8192/8192 bytes at offset 65536
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 4096/4096 bytes at offset 77824
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 8192/8192 bytes at offset 258048
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 8192/8192 bytes at offset 253952
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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No errors were found on the image.
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== verifying patterns (4) ==
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read 61440/61440 bytes at offset 0
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60 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 61440
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 8192/8192 bytes at offset 65536
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 73728
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 77824
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 172032/172032 bytes at offset 81920
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168 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 8192/8192 bytes at offset 253952
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8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 262144
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 65536/65536 bytes at offset 266240
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== re-zeroing overwritten area ==
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wrote 196608/196608 bytes at offset 65536
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192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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No errors were found on the image.
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== verifying patterns (5) ==
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read 61440/61440 bytes at offset 0
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60 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 61440
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 196608/196608 bytes at offset 65536
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192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 262144
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 259072/259072 bytes at offset 266240
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253 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 13312/13312 bytes at offset 525312
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13 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 509952/509952 bytes at offset 538624
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498 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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*** done
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