[Qemu-devel] [RFC PATCH COLO v2 00/13] 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-v2

Changs Log:
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 (13):
  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
  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                    | 242 +++++++++++++++++++++++-
 block/Makefile.objs        |   2 +-
 block/backup.c             |  12 ++
 block/nbd.c                | 171 +++++++++++++++--
 block/qcow2.c              | 447 ++++++++++++++++++++++++++++++++++++++++++++-
 block/qcow2.h              |   6 +
 block/quorum.c             | 143 ++++++++++++++-
 docs/block-replication.txt | 147 +++++++++++++++
 include/block/block.h      |   5 +
 include/block/block_int.h  |  13 ++
 include/qemu/hbitmap.h     |   8 +
 qapi/block.json            |  16 ++
 tests/qemu-iotests/051     |  13 ++
 tests/qemu-iotests/051.out |  13 ++
 util/hbitmap.c             |  19 ++
 15 files changed, 1230 insertions(+), 27 deletions(-)
 create mode 100644 docs/block-replication.txt

-- 
2.1.0