[PATCH 0/3] block-ram-registrar: reset when the graph changes

[Stefan Hajnoczi]

Kevin pointed out that block-ram-registrar doesn't handle graph changes. New
nodes must have all of guest RAM registered before they can process I/O
requests with BDRV_REQ_REGISTERED_BUF.

These patches add a mechanism for monitoring graph changes and use it to
refresh registered buffers in block-ram-registrar.

Stefan Hajnoczi (3):
  block: add BdrvChildClass->pre_detach() and ->post_attach()
  block-backend: add graph change notifier API
  block-ram-registrar: reset when the graph changes

 include/block/block_int-common.h            |  8 +++
 include/sysemu/block-backend-global-state.h | 10 +++
 block.c                                     | 34 +++++++++
 block/block-backend.c                       | 79 +++++++++++++++++++++
 block/block-ram-registrar.c                 | 40 +++++++++--
 block/trace-events                          |  2 +
 6 files changed, 168 insertions(+), 5 deletions(-)

-- 
2.39.0