Some image formats support backing images that are smaller than the
image file. This patch adds a test that verifies that reads and writes
beyond the end of backing image work.
Unallocated reads beyond the end of the backing file should produce
zeroes.
Writes beyond the end of the backing file should copy-on-write using
zeroes.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Image formats that grow the image file on demand and are organized into
clusters must handle sub-cluster allocating writes. Such writes touch
a portion of a previously unallocated data cluster. After the image
file is grown with the written data, reads of that cluster should work
as expected:
1. Sectors before the written region are zero.
2. The written region is present and the data is uncorrupted.
3. Sectors after the written region are zero.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Additionally to testing the qemu-img convert -B option, also test
-o backing_file.
Also, the old test acidentlly used a pattern of zeros for most of the writes,
so that the allocation test didn't really work out. This is fixed by using an
explicit pattern.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
I got a bug report with test output diffs like this:
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+4 KiB, 1 ops; 0.0000 sec (inf EiB/sec and inf ops/sec)
This patch extends the regular expression to consider terabytes, petabytes and
exabytes, and to allow inf as value for the throughput.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The old test didn't consider cases in which the COW files contains some
unallocated clusters and after them allocated ones again.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This patch adds an image resize grow test to ensure that existing data
is not lost during grow and new space is zeroed.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The tests use bash language features like 'let', which aren't supported
by /bin/sh on systems that use a conservative shell like dash. This
patch changes the interpreter to /bin/bash.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This patch adds test case 023 which tests some more cluster sizes. For
anythinger larger than 4k clusters we can't use requests that are l2_size or
more (128k for 1k clusters, 2 MB for 4k clusters, 512 MB for 64k clusters).
Therefore one of the common.pattern cases is changed and needs new expected
results for some old test cases.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Change the offsets for test requests according to CLUSTER_SIZE.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Change the io_test and io_test2 functions to take the cluster size of the image
and the number of test requests to issue. Tests are changed to specify a
cluster size (usually 4k), but expected test results stay the same for now
(apart from qemu-img printing the cluster size now).
Based on a patch written by Christoph Hellwig.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
VDI supports an image option 'static'.
Ignore "static=off" from qemu-img output.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
We need to be able to pass "write -b" as an operation to the pattern testing
functions. Unfortunately, this contains a space character...
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Blue Swirl notices that we were using the old FSF post address in the
license boilerplates. Replace both the old and new address with links
to the gnu.org licenses homepage as suggested by Ben Pfaff.
Signed-off-by: Christoph Hellwig <hch@lst.de>
The write pattern value 0axb is invalid and evaluates to 0,
so the read check (which uses a correct value of 0xab) will fail.
This failure will only be detected with a separate patch for
qemu-io. Without it, qemu-io cannot interpret hex values
and always uses a pattern value of 0.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pretend that a non-implemented check is always successful and thus allow
various tests that were qcow2-specific before to be generic.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
015: Combined test to grow the refcount table and test snapshots.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Stefan Hajnoczi
Kevin Wolf
Stefan Weil
Christoph Hellwig
Christoph Hellwig