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block: invoke .bdrv_drain callback in coroutine context and from AioContext

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This will let the callback take a CoMutex in the next patch.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170629132749.997-8-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-06-29 15:27:45 +02:00 • committed by Fam Zheng
parent e7569c1829
commit 61124f03ab
3 changed files with 37 additions and 13 deletions
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2
include/block/block_int.h
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@ -324,7 +324,7 @@ struct BlockDriver {
* Drain and stop any internal sources of requests in the driver, and
* remain so until next I/O callback (e.g. bdrv_co_writev) is called.
*/
void (*bdrv_drain)(BlockDriverState *bs);
void coroutine_fn (*bdrv_co_drain)(BlockDriverState *bs);
void (*bdrv_add_child)(BlockDriverState *parent, BlockDriverState *child,
Error **errp);