2018-01-18 00:54:19 +08:00
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QA output created by 204
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== setting up files ==
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
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wrote 134217728/134217728 bytes at offset 0
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128 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>
2020-07-07 04:39:52 +08:00
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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2018-01-18 00:54:19 +08:00
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wrote 115343360/115343360 bytes at offset 0
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110 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== constrained alignment and max-transfer ==
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wrote 131072/131072 bytes at offset 1000
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128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 131072/131072 bytes at offset 1000
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128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== write zero with constrained max-transfer ==
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wrote 2093056/2093056 bytes at offset 8003584
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1.996 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== non-power-of-2 write zeroes limits ==
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wrote 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== non-power-of-2 discard limits ==
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discard 31457280/31457280 bytes at offset 80000001
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30 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== block status smaller than alignment ==
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1/1 bytes allocated at offset 1 bytes
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16/1000 bytes allocated at offset 110 MiB
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0/1048576 bytes allocated at offset 127 MiB
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110 MiB (0x6e00000) bytes allocated at offset 0 bytes (0x0)
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18 MiB (0x1200000) bytes not allocated at offset 110 MiB (0x6e00000)
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== verify image content ==
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read 1000/1000 bytes at offset 0
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1000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 131072/131072 bytes at offset 1000
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128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 7871512/7871512 bytes at offset 132072
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7.507 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 2093056/2093056 bytes at offset 8003584
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1.996 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 23457792/23457792 bytes at offset 10096640
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22.371 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 13631488/13631488 bytes at offset 67108864
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13 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 30408704/30408704 bytes at offset 80740352
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29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4194304/4194304 bytes at offset 111149056
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 18874368/18874368 bytes at offset 115343360
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18 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Offset Length File
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0 0x800000 TEST_DIR/t.IMGFMT
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0x900000 0x2400000 TEST_DIR/t.IMGFMT
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0x3c00000 0x1100000 TEST_DIR/t.IMGFMT
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0x6a00000 0x400000 TEST_DIR/t.IMGFMT
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2019-06-13 01:00:30 +08:00
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0x6e00000 0x1200000 TEST_DIR/t.IMGFMT.base
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2018-01-18 00:54:19 +08:00
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No errors were found on the image.
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*** done
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