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[Qemu-devel] [PATCH COLO-Block v5 06/15] Don't allow a disk use backing
From: |
Wen Congyang |
Subject: |
[Qemu-devel] [PATCH COLO-Block v5 06/15] Don't allow a disk use backing reference target |
Date: |
Thu, 21 May 2015 12:52:59 +0800 |
Signed-off-by: Wen Congyang <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Gonglei <address@hidden>
---
block.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/block.c b/block.c
index 220ba9a..1b362ba 100644
--- a/block.c
+++ b/block.c
@@ -1206,6 +1206,14 @@ static int
bdrv_open_backing_reference_file(BlockDriverState *bs,
}
backing_hd = blk_bs(backing_blk);
+ /* Don't allow a disk use backing reference target */
+ ret = blk_attach_dev(backing_hd->blk, bs);
+ if (ret < 0) {
+ error_setg(errp, "backing_hd %s is used by the other device model",
+ backing_name);
+ goto free_exit;
+ }
+
/* Backing reference itself? */
if (backing_hd == bs || bdrv_find_overlay(backing_hd, bs)) {
error_setg(errp, "Backing reference itself");
@@ -1889,6 +1897,7 @@ void bdrv_close(BlockDriverState *bs)
if (backing_hd->backing_hd->job) {
block_job_cancel(backing_hd->backing_hd->job);
}
+ blk_detach_dev(backing_hd->backing_hd->blk, bs);
bdrv_set_backing_hd(backing_hd, NULL);
bdrv_unref(backing_hd->backing_hd);
}
--
2.1.0
- [Qemu-devel] [PATCH COLO-Block v5 00/15] Block replication for continuous checkpoints, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 02/15] allow writing to the backing file, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 01/15] docs: block replication's description, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 04/15] block: Parse "backing_reference" option to reference existing BDS, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 06/15] Don't allow a disk use backing reference target,
Wen Congyang <=
- [Qemu-devel] [PATCH COLO-Block v5 07/15] Add new block driver interface to connect/disconnect the remote target, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 03/15] Allow creating backup jobs when opening BDS, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 08/15] NBD client: implement block driver interfaces to connect/disconnect NBD server, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 09/15] Introduce a new -drive option to control whether to connect to remote target, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 10/15] NBD client: connect to nbd server later, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 12/15] skip nbd_target when starting block replication, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 11/15] Add new block driver interfaces to control block replication, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 13/15] quorum: implement block driver interfaces for block replication, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 14/15] quorum: allow ignoring child errors, Wen Congyang, 2015/05/21
- [Qemu-devel] [PATCH COLO-Block v5 15/15] Implement new driver for block replication, Wen Congyang, 2015/05/21