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[Qemu-block] [Patch v12 01/10] unblock backup operations in backing file
From: |
Wen Congyang |
Subject: |
[Qemu-block] [Patch v12 01/10] unblock backup operations in backing file |
Date: |
Fri, 27 Nov 2015 14:14:47 +0800 |
Signed-off-by: Wen Congyang <address@hidden>
---
block.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/block.c b/block.c
index bfc2be8..eaf479a 100644
--- a/block.c
+++ b/block.c
@@ -1275,6 +1275,24 @@ void bdrv_set_backing_hd(BlockDriverState *bs,
BlockDriverState *backing_hd)
/* Otherwise we won't be able to commit due to check in bdrv_commit */
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_COMMIT_TARGET,
bs->backing_blocker);
+ /*
+ * We do backup in 3 ways:
+ * 1. drive backup
+ * The target bs is new opened, and the source is top BDS
+ * 2. blockdev backup
+ * Both the source and the target are top BDSes.
+ * 3. internal backup(used for block replication)
+ * Both the source and the target are backing file
+ *
+ * In case 1, and 2, the backing file is neither the source nor
+ * the target.
+ * In case 3, we will block the top BDS, so there is only one block
+ * job for the top BDS and its backing chain.
+ */
+ bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_SOURCE,
+ bs->backing_blocker);
+ bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_TARGET,
+ bs->backing_blocker);
out:
bdrv_refresh_limits(bs, NULL);
}
--
2.5.0
- [Qemu-block] [Patch v12 00/10] Block replication for continuous checkpoints, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 04/10] Allow creating backup jobs when opening BDS, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 02/10] Store parent BDS in BdrvChild, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 03/10] Backup: clear all bitmap when doing block checkpoint, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 01/10] unblock backup operations in backing file,
Wen Congyang <=
- [Qemu-block] [Patch v12 06/10] Add new block driver interfaces to control block replication, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 05/10] docs: block replication's description, Wen Congyang, 2015/11/27
- [Qemu-block] [Patch v12 07/10] quorum: implement block driver interfaces for block replication, Wen Congyang, 2015/11/27