[PATCH 0/9] mirror: allow switching from background to active mode

[Fiona Ebner]

With active mode, the guest write speed is limited by the synchronous
writes to the mirror target. For this reason, management applications
might want to start out in background mode and only switch to active
mode later, when certain conditions are met. This series adds a
block-job-change QMP command to acheive that, as well as
job-type-specific information when querying block jobs, which
can be used to decide when the switch should happen.

For now, only the direction background -> active is supported.

The information added upon querying is whether the target is actively
synced, the total data sent, and the remaining dirty bytes.

Initially, I tried to go for a more general 'job-change' command, but
I couldn't figure out a way to avoid mutual inclusion between
block-core.json and job.json.

Fiona Ebner (9):
  blockjob: introduce block-job-change QMP command
  block/mirror: set actively_synced even after the job is ready
  mirror: implement mirror_change method
  qapi/block-core: use JobType for BlockJobInfo's type
  qapi/block-core: turn BlockJobInfo into a union
  blockjob: query driver-specific info via a new 'query' driver method
  mirror: return mirror-specific information upon query
  mirror: return the remaining dirty bytes upon query
  mirror: return the total number of bytes sent upon query

 block/mirror.c                 | 61 ++++++++++++++++++++++++++++++--
 block/monitor/block-hmp-cmds.c |  4 +--
 blockdev.c                     | 14 ++++++++
 blockjob.c                     | 26 +++++++++++++-
 include/block/blockjob.h       | 11 ++++++
 include/block/blockjob_int.h   | 10 ++++++
 job.c                          |  1 +
 qapi/block-core.json           | 63 ++++++++++++++++++++++++++++++++--
 qapi/job.json                  |  4 ++-
 9 files changed, 184 insertions(+), 10 deletions(-)

-- 
2.30.2