bwlp/qemu.git - Experimental fork of QEMU with video encoding patches

	Commit message (Collapse)	Author	Age	Files	Lines
*	qcow2: Return 0/-errno in qcow2_alloc_compressed_cluster_offset()	Kevin Wolf	2019-03-08	1	-1/+1
\| \| \| \| \| \| \| \| \| \| \| \| \|	qcow2_alloc_compressed_cluster_offset() used to return the cluster offset for success and 0 for error. This doesn't only conflict with 0 as a valid host offset, but also loses the error code. Similar to the change made to qcow2_alloc_cluster_offset() for uncompressed clusters in commit 148da7ea9d6, make the function return 0/-errno and return the allocated cluster offset in a by-reference parameter. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
*	iotests: Add new test 220 for max compressed cluster offset	Eric Blake	2018-11-19	1	-0/+54
	If you have a capable file system (tmpfs is good, ext4 not so much; run ./check with TEST_DIR pointing to a good location so as not to skip the test), it's actually possible to create a qcow2 file that expands to a sparse 512T image with just over 38M of content. The test is not the world's fastest (qemu crawling through 256M bits of refcount table to find the next cluster to allocate takes several seconds, as does qemu-img check reporting millions of leaked clusters); but it DOES catch the problem that the previous patch just fixed where writing a compressed cluster to a full image ended up overwriting the wrong cluster. Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>