sd-rtnl: do not require ifindex to be set for SETLINK messages

The kernel will then look up the ifindex itself based on the name.
This should be used very carefully as it is racey.

[This was a left-over hunk from my previous nspawn patch.]

diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
index 15e3247aca90dff62178320b78a8c3d7f5647664..a13bd48725212d057effac0eca6a3675110aab4e 100644 (file)
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ b/src/libsystemd/sd-rtnl/rtnl-message.c
@@ -147,7 +147,8 @@ int sd_rtnl_message_new_link(uint16_t nlmsg_type, int index, sd_rtnl_message **r
         int r;
 
         assert_return(rtnl_message_type_is_link(nlmsg_type), -EINVAL);
-        assert_return(nlmsg_type == RTM_NEWLINK || index > 0, -EINVAL);
+        assert_return(nlmsg_type == RTM_NEWLINK ||
+                      nlmsg_type == RTM_SETLINK || index > 0, -EINVAL);
         assert_return(ret, -EINVAL);
 
         r = message_new(ret, NLMSG_SPACE(sizeof(struct ifinfomsg)));