From 0c5e94ee8339e1aa49020466eba232e6f7c31a0a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Beno=C3=AEt=20Canet?= Date: Wed, 12 Feb 2014 17:15:07 +0100 Subject: block: Open by reference will try device then node_name. Since we introduced node_name for named bs of the graph modify the opening by reference to use it as a fallback. This patch also enforce the separation of the device id and graph node namespaces. Signed-off-by: Benoit Canet Reviewed-by: Max Reitz Signed-off-by: Stefan Hajnoczi --- block.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'block.c') diff --git a/block.c b/block.c index ba2aecf87a..8f718f9f29 100644 --- a/block.c +++ b/block.c @@ -796,6 +796,13 @@ static int bdrv_assign_node_name(BlockDriverState *bs, return -EINVAL; } + /* takes care of avoiding namespaces collisions */ + if (bdrv_find(node_name)) { + error_setg(errp, "node-name=%s is conflicting with a device id", + node_name); + return -EINVAL; + } + /* takes care of avoiding duplicates node names */ if (bdrv_find_node(node_name)) { error_setg(errp, "Duplicate node name"); @@ -977,9 +984,8 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename, } QDECREF(options); - bs = bdrv_find(reference); + bs = bdrv_lookup_bs(reference, reference, errp); if (!bs) { - error_setg(errp, "Cannot find block device '%s'", reference); return -ENODEV; } bdrv_ref(bs); -- cgit v1.2.3