Previouly, "qemu-img convert" from ISO to VMDK with subformat=streamOptimized
fails:
$ ./qemu-img convert -O vmdk -o subformat=streamOptimized foo.iso bar.vmdk
VMDK: can't write to allocated cluster for streamOptimized
qemu-img: error while writing sector 64: Input/output error
Because current code in qemu-img.c uses the normal convert loop, rather than
the compressed == true loop, which write by cluster size. In VMDK
streamOptimized, writes must be in cluster unit, because overlapped write to
an allocated cluster is not supported.
This series adds an is_compressed field in BlockDriverInfo, and use compressed
convertion loop if the block driver set this field to true.
Implement .bdrv_get_info and .bdrv_write_compressed in VMDK driver to fit into
this framework.
Fam Zheng (5):
qemu-img: Convert by cluster size if target is compressed
vmdk: Implement .bdrv_write_compressed
block: Change BlockDriverInfo.cluster_size to 64 bits
vmdk: Implement .bdrv_get_info()
mirror: Check for bdrv_get_info result
block/mirror.c | 4 ++--
block/vmdk.c | 33 +++++++++++++++++++++++++++++++++
include/block/block.h | 3 ++-
qemu-img.c | 8 ++++++--
tests/qemu-iotests/059.out | 1 +
5 files changed, 44 insertions(+), 5 deletions(-)
--
1.8.4.2
