qemu-iotests: test I/O after EOF for growable files

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviwed-by: Kevin Wolf <kwolf@redhat.com>

qemu-iotests: fix pattern for write test

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>

qemu-iotests: make a few more tests generic

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>

qemu-iotests: remove test image after 015 is done

Signed-off-by: Christoph Hellwig <hch@lst.de>

qemu-iotests: add support for the vdi image format

Signed-off-by: Christoph Hellwig <hch@lst.de>

qemu-iotests: add test for refcount table growth and snapshots

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>

qemu-iotests: skip test 005 for vpc format images

The vpc format doesn't support large enough image size for this test.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

qemu-iotests: Initial import into the public repository.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>