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[Qemu-block] [PATCH RFC 2/7] block-backend: Introduce blk_root() helper
From: |
zhanghailiang |
Subject: |
[Qemu-block] [PATCH RFC 2/7] block-backend: Introduce blk_root() helper |
Date: |
Thu, 20 Oct 2016 21:57:35 +0800 |
With this helper function, we can get the BdrvChild struct
from BlockBackend
Signed-off-by: zhanghailiang <address@hidden>
---
block/block-backend.c | 5 +++++
include/sysemu/block-backend.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/block/block-backend.c b/block/block-backend.c
index 1a724a8..66387f0 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -389,6 +389,11 @@ BlockDriverState *blk_bs(BlockBackend *blk)
return blk->root ? blk->root->bs : NULL;
}
+BdrvChild *blk_root(BlockBackend *blk)
+{
+ return blk->root;
+}
+
static BlockBackend *bdrv_first_blk(BlockDriverState *bs)
{
BdrvChild *child;
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index b07159b..867f9f5 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -99,6 +99,7 @@ void blk_remove_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
bool bdrv_has_blk(BlockDriverState *bs);
bool bdrv_is_root_node(BlockDriverState *bs);
+BdrvChild *blk_root(BlockBackend *blk);
void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
void blk_iostatus_enable(BlockBackend *blk);
--
1.8.3.1
- [Qemu-block] [PATCH RFC 0/7] COLO block replication supports shared disk case, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 3/7] replication: add shared-disk and shared-disk-id options, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 2/7] block-backend: Introduce blk_root() helper,
zhanghailiang <=
- [Qemu-block] [PATCH RFC 6/7] replication: Implement block replication for shared disk case, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 5/7] replication: fix code logic with the new shared_disk option, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 1/7] docs/block-replication: Add description for shared-disk case, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 7/7] nbd/replication: implement .bdrv_get_info() for nbd and replication driver, zhanghailiang, 2016/10/20
- [Qemu-block] [PATCH RFC 4/7] replication: Split out backup_do_checkpoint() from secondary_do_checkpoint(), zhanghailiang, 2016/10/20