[Qemu-devel] [PATCH v11 00/14] backup-top filter driver for backup

[Vladimir Sementsov-Ogievskiy]

Hi all!

These series introduce backup-top driver. It's a filter-node, which
do copy-before-write operation. Mirror uses filter-node for handling
guest writes, let's move to filter-node (from write-notifiers) for
backup too.

v11: based on Kevin's block branch

02,03: Add Max's r-b
04: - improve comments
    - rebase on dropped backup_drain
    - s/job/bcs/ in trace events
05: one hunk dropped due to rebasing
    on dropped backup_drain, still,
    keep Max's r-b
06: rebased on 04 changes, keep Max's r-b
08,13,14: add Max's r-b

Based-on: git://repo.or.cz/qemu/kevin.git block

Vladimir Sementsov-Ogievskiy (14):
  block/backup: fix backup_cow_with_offload for last cluster
  block/backup: split shareable copying part from backup_do_cow
  block/backup: improve comment about image fleecing
  block/backup: introduce BlockCopyState
  block/backup: fix block-comment style
  block: move block_copy from block/backup.c to separate file
  block: teach bdrv_debug_breakpoint skip filters with backing
  iotests: prepare 124 and 257 bitmap querying for backup-top filter
  iotests: 257: drop unused Drive.device field
  iotests: 257: drop device_add
  block/io: refactor wait_serialising_requests
  block: add lock/unlock range functions
  block: introduce backup-top filter driver
  block/backup: use backup-top instead of write notifiers

 qapi/block-core.json          |   8 +-
 block/backup-top.h            |  37 ++
 include/block/block-copy.h    |  84 ++++
 include/block/block_int.h     |   5 +
 block.c                       |  34 +-
 block/backup-top.c            | 240 ++++++++++++
 block/backup.c                | 440 ++++-----------------
 block/block-copy.c            | 337 ++++++++++++++++
 block/io.c                    |  68 +++-
 block/replication.c           |   2 +-
 blockdev.c                    |   1 +
 block/Makefile.objs           |   3 +
 block/trace-events            |  14 +-
 tests/qemu-iotests/056        |   8 +-
 tests/qemu-iotests/124        |  83 ++--
 tests/qemu-iotests/257        |  91 ++---
 tests/qemu-iotests/257.out    | 714 ++++++++++++++--------------------
 tests/qemu-iotests/iotests.py |  27 ++
 18 files changed, 1278 insertions(+), 918 deletions(-)
 create mode 100644 block/backup-top.h
 create mode 100644 include/block/block-copy.h
 create mode 100644 block/backup-top.c
 create mode 100644 block/block-copy.c

-- 
2.18.0