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[PATCH v7 12/13] block: Add bdrv_co_move_to_aio_context()
From: |
Kevin Wolf |
Subject: |
[PATCH v7 12/13] block: Add bdrv_co_move_to_aio_context() |
Date: |
Wed, 9 Sep 2020 17:11:48 +0200 |
Add a function to move the current coroutine to the AioContext of a
given BlockDriverState.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
include/block/block.h | 6 ++++++
block.c | 10 ++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/block/block.h b/include/block/block.h
index 981ab5b314..80ab322f11 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -626,6 +626,12 @@ bool bdrv_debug_is_suspended(BlockDriverState *bs, const
char *tag);
*/
AioContext *bdrv_get_aio_context(BlockDriverState *bs);
+/**
+ * Move the current coroutine to the AioContext of @bs and return the old
+ * AioContext of the coroutine.
+ */
+AioContext *coroutine_fn bdrv_co_move_to_aio_context(BlockDriverState *bs);
+
/**
* Transfer control to @co in the aio context of @bs
*/
diff --git a/block.c b/block.c
index 9538af4884..81403e00d1 100644
--- a/block.c
+++ b/block.c
@@ -6372,6 +6372,16 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs)
return bs ? bs->aio_context : qemu_get_aio_context();
}
+AioContext *coroutine_fn bdrv_co_move_to_aio_context(BlockDriverState *bs)
+{
+ Coroutine *self = qemu_coroutine_self();
+ AioContext *old_ctx = qemu_coroutine_get_aio_context(self);
+ AioContext *new_ctx = bdrv_get_aio_context(bs);
+
+ aio_co_reschedule_self(new_ctx);
+ return old_ctx;
+}
+
void bdrv_coroutine_enter(BlockDriverState *bs, Coroutine *co)
{
aio_co_enter(bdrv_get_aio_context(bs), co);
--
2.25.4
- Re: [PATCH v7 08/13] qapi: Add a 'coroutine' flag for commands, (continued)
[PATCH v7 09/13] qmp: Move dispatcher to a coroutine, Kevin Wolf, 2020/09/09
[PATCH v7 11/13] util/async: Add aio_co_reschedule_self(), Kevin Wolf, 2020/09/09
[PATCH v7 10/13] hmp: Add support for coroutine command handlers, Kevin Wolf, 2020/09/09
[PATCH v7 12/13] block: Add bdrv_co_move_to_aio_context(),
Kevin Wolf <=
[PATCH v7 13/13] block: Convert 'block_resize' to coroutine, Kevin Wolf, 2020/09/09
Re: [PATCH v7 00/13] monitor: Optionally run handlers in coroutines, no-reply, 2020/09/09