@@ -1910,6 +1910,7 @@ void bdrv_drain_all(void)
bool bs_busy;
aio_context_acquire(aio_context);
+ bdrv_io_unplug(bs);
bdrv_start_throttled_reqs(bs);
bs_busy = bdrv_requests_pending(bs);
bs_busy |= aio_poll(aio_context, bs_busy);
@@ -5774,3 +5775,19 @@ bool bdrv_is_first_non_filter(BlockDriverState *candidate)
return false;
}
+
+void bdrv_io_plug(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_io_plug) {
+ drv->bdrv_io_plug(bs);
+ }
+}
+
+void bdrv_io_unplug(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_io_unplug) {
+ drv->bdrv_io_unplug(bs);
+ }
+}
@@ -578,4 +578,7 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs);
*/
void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context);
+void bdrv_io_plug(BlockDriverState *bs);
+void bdrv_io_unplug(BlockDriverState *bs);
+
#endif
@@ -257,6 +257,10 @@ struct BlockDriver {
void (*bdrv_attach_aio_context)(BlockDriverState *bs,
AioContext *new_context);
+ /* io queue for linux-aio */
+ void (*bdrv_io_plug)(BlockDriverState *bs);
+ void (*bdrv_io_unplug)(BlockDriverState *bs);
+
QLIST_ENTRY(BlockDriver) list;
};