[Qemu-devel] [PATCH 0/5] Fix conversion from ISO to VMDK streamOptimized

[Fam Zheng <famz@redhat.com>]

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