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qemu/tests/qemu-iotests/066.out

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qemu-iotests: Discard preallocated zero clusters Add a new test case for discarding preallocated zero clusters; doing this should not result in any leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-09 14:07:33 +04:00
QA output created by 066
qcow2: Allow discard of final unaligned cluster As mentioned in commit 0c1bd46, we ignored requests to discard the trailing cluster of an unaligned image. While discard is an advisory operation from the guest standpoint, (and we are therefore free to ignore any request), our qcow2 implementation exploits the fact that a discarded cluster reads back as 0. As long as we discard on cluster boundaries, we are fine; but that means we could observe non-zero data leaked at the tail of an unaligned image. Enhance iotest 66 to cover this case, and fix the implementation to honor a discard request on the final partial cluster. Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170407013709.18440-1-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-07 04:37:09 +03:00
=== Testing cluster discards ===
qemu-iotests: Discard preallocated zero clusters Add a new test case for discarding preallocated zero clusters; doing this should not result in any leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-09 14:07:33 +04:00
qcow2: Allow discard of final unaligned cluster As mentioned in commit 0c1bd46, we ignored requests to discard the trailing cluster of an unaligned image. While discard is an advisory operation from the guest standpoint, (and we are therefore free to ignore any request), our qcow2 implementation exploits the fact that a discarded cluster reads back as 0. As long as we discard on cluster boundaries, we are fine; but that means we could observe non-zero data leaked at the tail of an unaligned image. Enhance iotest 66 to cover this case, and fix the implementation to honor a discard request on the final partial cluster. Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170407013709.18440-1-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-07 04:37:09 +03:00
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67109376
qemu-iotests: Discard preallocated zero clusters Add a new test case for discarding preallocated zero clusters; doing this should not result in any leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-09 14:07:33 +04:00
wrote 262144/262144 bytes at offset 0
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 262144/262144 bytes at offset 0
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qcow2: Allow discard of final unaligned cluster As mentioned in commit 0c1bd46, we ignored requests to discard the trailing cluster of an unaligned image. While discard is an advisory operation from the guest standpoint, (and we are therefore free to ignore any request), our qcow2 implementation exploits the fact that a discarded cluster reads back as 0. As long as we discard on cluster boundaries, we are fine; but that means we could observe non-zero data leaked at the tail of an unaligned image. Enhance iotest 66 to cover this case, and fix the implementation to honor a discard request on the final partial cluster. Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170407013709.18440-1-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-07 04:37:09 +03:00
wrote 512/512 bytes at offset 67108864
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
discard 67109376/67109376 bytes at offset 0
64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 67109376/67109376 bytes at offset 0
64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-iotests: Discard preallocated zero clusters Add a new test case for discarding preallocated zero clusters; doing this should not result in any leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-09 14:07:33 +04:00
No errors were found on the image.
iotests: Extend test 066 066 was supposed to be a test "for discarding preallocated zero clusters", but it did so incompletely: While it did check the image file's integrity after the operation, it did not confirm that the clusters are indeed freed. This patch adds this test. In addition, new cases for writing to preallocated zero clusters are added. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-05-04 02:11:20 +03:00
Offset Length Mapped to File
=== Writing to preallocated zero clusters ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67109376
wrote 262144/262144 bytes at offset 1048576
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 262144/262144 bytes at offset 1048576
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 196608/196608 bytes at offset 1081344
192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
read 32768/32768 bytes at offset 1048576
32 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 196608/196608 bytes at offset 1081344
192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 32768/32768 bytes at offset 1277952
32 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Successfully reused original clusters.
=== Writing to a snapshotted preallocated zero cluster ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Consecutive write to a preallocated zero cluster ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=196608
wrote 196608/196608 bytes at offset 0
192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 196608/196608 bytes at offset 0
192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
Successfully reused original clusters.
qemu-iotests: Discard preallocated zero clusters Add a new test case for discarding preallocated zero clusters; doing this should not result in any leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-09 14:07:33 +04:00
*** done
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