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[v15,2/9] Store parent BDS in BdrvChild

Message ID 1454645888-28826-3-git-send-email-xiecl.fnst@cn.fujitsu.com (mailing list archive)
State New, archived
Headers show

Commit Message

Changlong Xie Feb. 5, 2016, 4:18 a.m. UTC 
From: Wen Congyang <wency@cn.fujitsu.com>

We need to access the parent BDS to get the root BDS.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
---
 block.c                   | 1 +
 include/block/block_int.h | 1 +
 2 files changed, 2 insertions(+)
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Patch

diff --git a/block.c b/block.c
index 70ab625..c18b462 100644
--- a/block.c
+++ b/block.c
@@ -1208,6 +1208,7 @@  BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
     BdrvChild *child = g_new(BdrvChild, 1);
     *child = (BdrvChild) {
         .bs     = child_bs,
+        .parent = parent_bs,
         .name   = g_strdup(child_name),
         .role   = child_role,
     };
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 89ec138..9204d1e 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -363,6 +363,7 @@  extern const BdrvChildRole child_format;
 
 struct BdrvChild {
     BlockDriverState *bs;
+    BlockDriverState *parent;
     char *name;
     const BdrvChildRole *role;
     QLIST_ENTRY(BdrvChild) next;