[PULL v2 00/22] implement discard operation for Parallels images

["Denis V. Lunev" via <qemu-devel@nongnu.org>]

The following changes since commit 4907644841e3200aea6475c0f72d3d987e9f3d93:

  Merge tag 'mem-2023-09-19' of https://github.com/davidhildenbrand/qemu into staging (2023-09-19 13:22:19 -0400)

are available in the Git repository at:

  https://src.openvz.org/scm/~den/qemu.git tags/pull-parallels-2023-09-20-v2

for you to fetch changes up to 1dba99e34d1bcb3c0de69c4270f9587b01e225fe:

  tests: extend test 131 to cover availability of the write-zeroes (2023-09-21 08:49:28 +0200)

----------------------------------------------------------------
Parallels format driver:
* regular calculation of cluster used bitmap of the image file
* cluster allocation on the base of that bitmap (effectively allocation of
  new clusters could be done inside the image if that offset space is unused)
* support of DISCARD and WRITE_ZEROES operations
* image check bugfixes
* unit tests fixes
* unit tests covering new functionality

----------------------------------------------------------------
Changes from v1:
* patch 12: bdrv_co_getlength -> bdrv_getlength in parallels_fill_used_bitmap
  as called from open()
* patch 19: added GRAPH_RDLOCK specifier for parallels_co_pdiscard
* patch 21: added GRAPH_RDLOCK specifier for parallels_co_pwrite_zeroes

----------------------------------------------------------------
Denis V. Lunev (22):
      parallels: fix formatting in bdrv_parallels initialization
      parallels: mark driver as supporting CBT
      parallels: fix memory leak in parallels_open()
      parallels: invent parallels_opts_prealloc() helper to parse prealloc opts
      parallels: return earler in fail_format branch in parallels_open()
      parallels: return earlier from parallels_open() function on error
      parallels: refactor path when we need to re-check image in parallels_open
      parallels: create mark_used() helper which sets bit in used bitmap
      tests: ensure that image validation will not cure the corruption
      parallels: fix broken parallels_check_data_off()
      parallels: add test which will validate data_off fixes through repair
      parallels: collect bitmap of used clusters at open
      tests: fix broken deduplication check in parallels format test
      tests: test self-cure of parallels image with duplicated clusters
      parallels: accept multiple clusters in mark_used()
      parallels: update used bitmap in allocate_cluster
      parallels: naive implementation of allocate_clusters with used bitmap
      parallels: improve readability of allocate_clusters
      parallels: naive implementation of parallels_co_pdiscard
      tests: extend test 131 to cover availability of the discard operation
      parallels: naive implementation of parallels_co_pwrite_zeroes
      tests: extend test 131 to cover availability of the write-zeroes

 block/parallels.c                             | 389 ++++++++++++++++++++------
 block/parallels.h                             |   3 +
 tests/qemu-iotests/131                        |  52 ++++
 tests/qemu-iotests/131.out                    |  60 ++++
 tests/qemu-iotests/tests/parallels-checks     |  76 ++++-
 tests/qemu-iotests/tests/parallels-checks.out |  65 ++++-
 6 files changed, 544 insertions(+), 101 deletions(-)

-- 
2.34.1