aboutsummaryrefslogtreecommitdiff
path: root/block
diff options
context:
space:
mode:
authorKevin Wolf <kwolf@redhat.com>2015-09-17 13:01:50 +0200
committerKevin Wolf <kwolf@redhat.com>2015-10-16 15:34:29 +0200
commita2d6190048d01c7012ab4fd6a2558f435b7b2fe8 (patch)
treec6caee1d5c509be15b11eb031694f198aca809dc /block
parent439db28cf9d4c29c9a97040bc8e08f047ba7e0af (diff)
block-backend: Add blk_set_bs()
It allows changing the BlockDriverState that a BlockBackend points to. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/block-backend.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c
index c2e873292a..225655126e 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -239,6 +239,23 @@ BlockDriverState *blk_bs(BlockBackend *blk)
}
/*
+ * Changes the BlockDriverState attached to @blk
+ */
+void blk_set_bs(BlockBackend *blk, BlockDriverState *bs)
+{
+ bdrv_ref(bs);
+
+ if (blk->bs) {
+ blk->bs->blk = NULL;
+ bdrv_unref(blk->bs);
+ }
+ assert(bs->blk == NULL);
+
+ blk->bs = bs;
+ bs->blk = blk;
+}
+
+/*
* Return @blk's DriveInfo if any, else null.
*/
DriveInfo *blk_legacy_dinfo(BlockBackend *blk)