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[Qemu-devel] [PATCH v2 6/9] block: Add bdrv_drained_end_no_poll()
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v2 6/9] block: Add bdrv_drained_end_no_poll() |
Date: |
Wed, 19 Jun 2019 17:26:00 +0200 |
In contrast to bdrv_drained_end(), which does poll and may thus lead to
graph changes, this new interface to bdrv_do_drained_end() will not
poll.
Signed-off-by: Max Reitz <address@hidden>
---
include/block/block.h | 12 +++++++++++-
block/io.c | 5 +++++
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/include/block/block.h b/include/block/block.h
index d98237f0f1..422448d773 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -680,10 +680,20 @@ void bdrv_subtree_drained_begin(BlockDriverState *bs);
/**
* bdrv_drained_end:
*
- * End a quiescent section started by bdrv_drained_begin().
+ * End a quiescent section started by bdrv_drained_begin(). This may
+ * result in block graph changes.
*/
void bdrv_drained_end(BlockDriverState *bs);
+/**
+ * bdrv_drained_end_no_poll:
+ *
+ * Same as bdrv_drained_end(), but do not poll for the subgraph to
+ * actually become unquiesced. Therefore, no graph changes will occur
+ * with this function.
+ */
+void bdrv_drained_end_no_poll(BlockDriverState *bs);
+
/**
* End a quiescent section started by bdrv_subtree_drained_begin().
*/
diff --git a/block/io.c b/block/io.c
index 5f30baa8e5..188dea22bc 100644
--- a/block/io.c
+++ b/block/io.c
@@ -539,6 +539,11 @@ void bdrv_drained_end(BlockDriverState *bs)
bdrv_do_drained_end(bs, false, NULL, false, true, NULL);
}
+void bdrv_drained_end_no_poll(BlockDriverState *bs)
+{
+ bdrv_do_drained_end(bs, false, NULL, false, false, NULL);
+}
+
void bdrv_subtree_drained_end(BlockDriverState *bs)
{
bdrv_do_drained_end(bs, true, NULL, false, true, NULL);
--
2.21.0
- [Qemu-devel] [PATCH v2 0/9] block: Delay poll when ending drained sections, Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 4/9] block: Move polling out of bdrv_drain_invoke(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 2/9] block: Add @data_objs to bdrv_drain_invoke(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 6/9] block: Add bdrv_drained_end_no_poll(),
Max Reitz <=
- [Qemu-devel] [PATCH v2 5/9] block: Add @poll to bdrv_parent_drained_end_single(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 1/9] block: Introduce BdrvChild.parent_quiesce_counter, Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 7/9] block: Fix BDS children's .drained_end(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 3/9] block: Add bdrv_poll_drain_data_objs(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 8/9] iotests: Add @has_quit to vm.shutdown(), Max Reitz, 2019/06/19
- [Qemu-devel] [PATCH v2 9/9] iotests: Test commit with a filter on the chain, Max Reitz, 2019/06/19