tree 53511dc975f9f608dc4cc8e073c81055ba3565b0
parent c1e1e5fa8f25f9061b076a05045a6d4950d1a891
author Fam Zheng <famz@redhat.com> 1445569689 +0800
committer Kevin Wolf <kwolf@redhat.com> 1445617104 +0200

block: Introduce "drained begin/end" API

The semantics is that after bdrv_drained_begin(bs), bs will not get new external
requests until the matching bdrv_drained_end(bs).

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>