[Qemu-devel] [PATCH COLO v3 00/14] Block replication for continuous checkpoints

[Wen Congyang <wency@cn.fujitsu.com>]

Block replication is a very important feature which is used for
continuous checkpoints(for example: COLO).

Usage:
Please refer to docs/block-replication.txt

You can get the patch here:
https://github.com/wencongyang/qemu-colo/commits/block-replication-v3

You can get the patch with the other COLO patches here:
https://github.com/wencongyang/qemu-colo/tree/colo_huawei_v4.4

Changs Log:
V3:
1: use error_setg() instead of error_set()
2. Add a new block job API
3. Active disk, hidden disk and nbd target uses the same AioContext
4. Add a testcase to test new hbitmap API
V2:
1. Redesign the secondary qemu(use image-fleecing)
2. Use Error objects to return error message
3. Address the comments from Max Reitz and Eric Blake

Wen Congyang (14):
  docs: block replication's description
  quorum: allow ignoring child errors
  NBD client: connect to nbd server later
  Add new block driver interfaces to control block replication
  quorum: implement block driver interfaces for block replication
  NBD client: implement block driver interfaces for block replication
  allow writing to the backing file
  Allow creating backup jobs when opening BDS
  block: Parse "backing_reference" option to reference existing BDS
  util/hbitmap: Add an API to reset all set bits in hbitmap
  Backup: clear all bitmap when doing block checkpoint
  qcow2: support colo
  skip nbd_target when starting block replication
  Don't allow a disk use backing reference target

 block.c                    | 246 +++++++++++++++++++++++-
 block/backup.c             |  13 ++
 block/nbd.c                | 171 +++++++++++++++--
 block/qcow2.c              | 454 ++++++++++++++++++++++++++++++++++++++++++++-
 block/qcow2.h              |   6 +
 block/quorum.c             | 141 +++++++++++++-
 blockjob.c                 |  10 +
 docs/block-replication.txt | 153 +++++++++++++++
 include/block/block.h      |   6 +
 include/block/block_int.h  |  12 ++
 include/block/blockjob.h   |  12 ++
 include/qemu/hbitmap.h     |   8 +
 qapi/block.json            |  16 ++
 stubs/Makefile.objs        |   1 +
 stubs/backup.c             |  11 ++
 tests/qemu-iotests/051     |  13 ++
 tests/qemu-iotests/051.out |  13 ++
 tests/test-hbitmap.c       |  39 ++++
 util/hbitmap.c             |  16 ++
 19 files changed, 1314 insertions(+), 27 deletions(-)
 create mode 100644 docs/block-replication.txt
 create mode 100644 stubs/backup.c

-- 
2.1.0