Test loading internal snapshots where the L1 table of the snapshot
is smaller than the current L1 table.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

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: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NChristoph 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: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

This adds test cases for qcow2 error paths (using blkdebug)
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph 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: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph 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: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

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

015: Combined test to grow the refcount table and test snapshots.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

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