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[Qemu-devel] [PATCH v6 08/12] block: Add "drained begin/end" for transac
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH v6 08/12] block: Add "drained begin/end" for transactional blockdev-backup |
Date: |
Thu, 22 Oct 2015 14:32:56 +0800 |
Similar to the previous patch, make sure that external events are not
dispatched during transaction operations.
Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Jeff Cody <address@hidden>
Reviewed-by: Kevin Wolf <address@hidden>
---
blockdev.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/blockdev.c b/blockdev.c
index 0a7848b..52f44b2 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1756,6 +1756,11 @@ static void blockdev_backup_prepare(BlkTransactionState
*common, Error **errp)
return;
}
+ if (!blk_is_available(blk)) {
+ error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
+ return;
+ }
+
target = blk_by_name(backup->target);
if (!target) {
error_setg(errp, "Device '%s' not found", backup->target);
@@ -1770,6 +1775,8 @@ static void blockdev_backup_prepare(BlkTransactionState
*common, Error **errp)
return;
}
aio_context_acquire(state->aio_context);
+ state->bs = blk_bs(blk);
+ bdrv_drained_begin(state->bs);
qmp_blockdev_backup(backup->device, backup->target,
backup->sync,
@@ -1782,7 +1789,6 @@ static void blockdev_backup_prepare(BlkTransactionState
*common, Error **errp)
return;
}
- state->bs = blk_bs(blk);
state->job = state->bs->job;
}
@@ -1802,6 +1808,7 @@ static void blockdev_backup_clean(BlkTransactionState
*common)
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common,
common);
if (state->aio_context) {
+ bdrv_drained_end(state->bs);
aio_context_release(state->aio_context);
}
}
--
2.4.3
- [Qemu-devel] [PATCH v6 00/12] block: Protect nested event loop with bdrv_drained_begin and bdrv_drained_end, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 02/12] nbd: Mark fd handlers client type as "external", Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 01/12] aio: Add "is_external" flag for event handlers, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 03/12] dataplane: Mark host notifiers' client type as "external", Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 04/12] aio: introduce aio_{disable, enable}_external, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 05/12] block: Introduce "drained begin/end" API, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 06/12] block: Add "drained begin/end" for transactional external snapshot, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 07/12] block: Add "drained begin/end" for transactional backup, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 08/12] block: Add "drained begin/end" for transactional blockdev-backup,
Fam Zheng <=
- [Qemu-devel] [PATCH v6 09/12] block: Add "drained begin/end" for internal snapshot, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 10/12] block: Introduce BlockDriver.bdrv_drain callback, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 11/12] qed: Implement .bdrv_drain, Fam Zheng, 2015/10/22
- [Qemu-devel] [PATCH v6 12/12] tests: Add test case for aio_disable_external, Fam Zheng, 2015/10/22