[Qemu-devel] [RFC PATCH 0/3] move global bdrv_states out of block.c

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

In order to support multiple caller from different thread, global
inside block layer should be carefully treated. bdrv_states represent
a group of bds* which is now used by qemu, so it is a user concept which
should be managed by user. This series tries to move it out, so later
different thread can feed the API with its own bds* group.

This is a RFC series which does not completely convert the API, the missing
part is adding parameter *l in all API which uses bdrv_states, then move
bdrv_states to caller. About 10 functions need to be converted, so hope to
get comments before that, to see if this is the right direction.

Wenchao Xia (3):
  1 block: add typedef for BlockDriverState queue
  2 block: add function qemu_get_bds_queue
  3 block: add parameter bds queue in bdrv_invalidate_cache_all()

 block.c               |   11 ++++++++---
 include/block/block.h |    7 ++++++-
 migration.c           |    2 +-
 3 files changed, 15 insertions(+), 5 deletions(-)