Commit e9d6456e authored by Wen Congyang's avatar Wen Congyang Committed by Stefan Hajnoczi
Browse files

block: unblock backup operations in backing file 



Signed-off-by: default avatarWen Congyang <wency@cn.fujitsu.com>
Signed-off-by: default avatarChanglong Xie <xiecl.fnst@cn.fujitsu.com>
Signed-off-by: default avatarWang WeiWei <wangww.fnst@cn.fujitsu.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Kashyap Chamarthy <kchamart@redhat.com>
Message-id: 1469602913-20979-2-git-send-email-xiecl.fnst@cn.fujitsu.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent b5c7ceaf

block.c

+17 −0
Original line number Diff line number Diff line
@@ -1312,6 +1312,23 @@ 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, neither the source nor the target is the backing file.

     * 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);

}