diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block_int.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 7e8a206239..dd62f4d083 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -354,10 +354,17 @@ struct BlockDriver { int (*bdrv_probe_geometry)(BlockDriverState *bs, HDGeometry *geo); /** - * 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. + * bdrv_co_drain is called if implemented in the beginning of a + * drain operation to drain and stop any internal sources of requests in + * the driver. + * bdrv_co_drain_end is called if implemented at the end of the drain. + * + * They should be used by the driver to e.g. manage scheduled I/O + * requests, or toggle an internal state. After the end of the drain new + * requests will continue normally. */ void coroutine_fn (*bdrv_co_drain)(BlockDriverState *bs); + void coroutine_fn (*bdrv_co_drain_end)(BlockDriverState *bs); void (*bdrv_add_child)(BlockDriverState *parent, BlockDriverState *child, Error **errp); |