diff options
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/block.h | 8 | ||||
| -rw-r--r-- | include/block/block_int.h | 3 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index bc76b1e59f..706ef009ad 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -569,6 +569,14 @@ void bdrv_parent_drained_begin(BlockDriverState *bs, BdrvChild *ignore, bool ignore_bds_parents); /** + * bdrv_parent_drained_begin_single: + * + * Begin a quiesced section for the parent of @c. If @poll is true, wait for + * any pending activity to cease. + */ +void bdrv_parent_drained_begin_single(BdrvChild *c, bool poll); + +/** * bdrv_parent_drained_end: * * End a quiesced section of all users of @bs. This is part of diff --git a/include/block/block_int.h b/include/block/block_int.h index af71b414be..81cd3db7a9 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -606,6 +606,9 @@ struct BdrvChildRole { * requests after returning from .drained_begin() until .drained_end() is * called. * + * These functions must not change the graph (and therefore also must not + * call aio_poll(), which could change the graph indirectly). + * * Note that this can be nested. If drained_begin() was called twice, new * I/O is allowed only after drained_end() was called twice, too. */ |