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
