(used to be 'qcow2: preallocation and COW improvements')

v7: patch 8/9:
    - is_zero_cow() function reworked
    - blkdbg event added
    - write-zeroes errors handled
    - iotest 60 fixed properly

v6: http://lists.nongnu.org/archive/html/qemu-devel/2018-01/msg03463.html

Anton Nefedov (9):
  mirror: inherit supported write/zero flags
  blkverify: set supported write/zero flags
  block: introduce BDRV_REQ_ALLOCATE flag
  block: treat BDRV_REQ_ALLOCATE as serialising
  file-posix: support BDRV_REQ_ALLOCATE
  block: support BDRV_REQ_ALLOCATE in passthrough drivers
  qcow2: move is_zero() up
  qcow2: skip writing zero buffers to empty COW areas
  iotest 134: test cluster-misaligned encrypted write

 qapi/block-core.json       |   4 +-
 block/qcow2.h              |   6 +++
 include/block/block.h      |   6 ++-
 include/block/block_int.h  |   2 +-
 block/blkdebug.c           |   3 +-
 block/blkverify.c          |   9 ++++
 block/file-posix.c         |   8 ++++
 block/io.c                 |  47 ++++++++++++++++-----
 block/mirror.c             |   5 +++
 block/qcow2-cluster.c      |   2 +-
 block/qcow2.c              | 101 ++++++++++++++++++++++++++++++++++++---------
 block/raw-format.c         |   3 +-
 block/trace-events         |   1 +
 tests/qemu-iotests/060     |  26 +++++++-----
 tests/qemu-iotests/060.out |   5 ++-
 tests/qemu-iotests/066     |   2 +-
 tests/qemu-iotests/066.out |   4 +-
 tests/qemu-iotests/134     |   9 ++++
 tests/qemu-iotests/134.out |  10 +++++
 19 files changed, 202 insertions(+), 51 deletions(-)

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2.7.4