[Qemu-devel] [PATCH 0/4] block: Allow query stats for drive-mirror target

[Fam Zheng <famz@redhat.com>]

This series adds an optional bool parameter "query-nodes" to query-blockstats.

By default, if omitted, the behavior is unchanged.

If set to "true", the command will iterate through all named nodes in BDS graph
and report the statistics in a list, similarly. But the backing chain is not
built.

This provides a way for libvirt to watch the allocation status
(wr_highest_offset) of target image. Now, libvirt can start drive-mirror job
specifying a node-name parameter. Thus the created target image gets a node
name that can be queried with the new query-blockstats.



Fam Zheng (4):
  block: Add bdrv_next_node
  block: Add bdrv_get_node_name
  block: Include "node-name" if present in query-blockstats
  qmp: Add optional switch "query-nodes" in query-blockstats

 block.c               | 14 +++++++++++++-
 block/qapi.c          | 25 ++++++++++++++++++-------
 hmp.c                 |  2 +-
 include/block/block.h |  2 ++
 qapi/block-core.json  |  9 +++++++--
 qmp-commands.hx       |  2 +-
 6 files changed, 42 insertions(+), 12 deletions(-)

-- 
1.9.3