[Qemu-devel] [PATCH 00/12] block: logical block provisioning enhancements

[Peter Lieven <pl@kamp.de>]

this patch adds the ability for targets to stay sparse during
block migration (if the zero_blocks capability is set) and qemu-img convert
even if the target does not have has_zero_init = 1.

the series was especially developed for iSCSI, but it should also work
with other drivers with little or no adjustments. these adjustments
should be limited to providing block provisioning information through
get_block_info and/or honouring BDRV_REQ_MAY_UNMAP on writing zeroes.

the last 4 patches are fixes/enhancements for the get_block_status API
discovered during development of this series.

Peter Lieven (12):
  block: make BdrvRequestFlags public
  block: add flags to bdrv_*_write_zeroes
  block: introduce BDRV_REQ_MAY_UNMAP in bdrv_co_write_zeroes
  iscsi: add .bdrv_co_write_zeroes
  block: add logical block provisioning information to BlockDriverInfo
  iscsi: add .bdrv_get_info
  block: introduce bdrv_zeroize
  qemu-img: conditionally zero out target on convert
  block/get_block_status: set *pnum = 0 on error
  block/get_block_status: avoid segfault if there is no backing_hd
  block/get_block_status: avoid redundant callouts on raw devices
  block/get_block_status: fix BDRV_BLOCK_ZERO for unallocated blocks

 block-migration.c         |    3 +-
 block.c                   |   86 ++++++++++++++++++++++++++++++--------
 block/backup.c            |    3 +-
 block/iscsi.c             |  102 +++++++++++++++++++++++++++++++++++++++++++++
 block/qcow2.c             |    2 +-
 block/qed.c               |    3 +-
 block/raw_bsd.c           |    5 ++-
 block/vmdk.c              |    3 +-
 include/block/block.h     |   20 ++++++++-
 include/block/block_int.h |    2 +-
 qemu-img.c                |   22 +++++++---
 qemu-io-cmds.c            |    2 +-
 12 files changed, 218 insertions(+), 35 deletions(-)

-- 
1.7.9.5