diff mbox

[for,2.9,v3,06/10] block: Introduce bdrv_coroutine_enter and *_if_inactive

Message ID 20170410150542.30376-7-famz@redhat.com
State New
Headers show

Commit Message

Fam Zheng April 10, 2017, 3:05 p.m. UTC 
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block.c               | 10 ++++++++++
 include/block/block.h | 11 +++++++++++
 2 files changed, 21 insertions(+)
diff mbox

Patch

diff --git a/block.c b/block.c
index a995a8e..e65b906 100644
--- a/block.c
+++ b/block.c
@@ -4324,6 +4324,16 @@  AioContext *bdrv_get_aio_context(BlockDriverState *bs)
     return bs->aio_context;
 }
 
+void bdrv_coroutine_enter(BlockDriverState *bs, Coroutine *co)
+{
+    aio_co_enter(bdrv_get_aio_context(bs), co);
+}
+
+void bdrv_coroutine_enter_if_inactive(BlockDriverState *bs, Coroutine *co)
+{
+    aio_co_enter_if_inactive(bdrv_get_aio_context(bs), co);
+}
+
 static void bdrv_do_remove_aio_context_notifier(BdrvAioNotifier *ban)
 {
     QLIST_REMOVE(ban, list);
diff --git a/include/block/block.h b/include/block/block.h
index 488a07e..dd9416e 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -558,6 +558,17 @@  bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag);
 AioContext *bdrv_get_aio_context(BlockDriverState *bs);
 
 /**
+ * Transfer control to @co in the aio context of @bs
+ */
+void bdrv_coroutine_enter(BlockDriverState *bs, Coroutine *co);
+
+/**
+ * Transfer control to @co in the aio context of @bs if it's not active (i.e.
+ * part of the call stack of the running coroutine). Otherwise, do nothing.
+ */
+void bdrv_coroutine_enter_if_inactive(BlockDriverState *bs, Coroutine *co);
+
+/**
  * bdrv_set_aio_context:
  *
  * Changes the #AioContext used for fd handlers, timers, and BHs by this