From: Tom Gundersen <teg@jklm.no>
Date: Sun, 16 Feb 2014 20:39:50 +0000 (+0100)
Subject: sd-rtnl: do not require ifindex to be set for SETLINK messages
X-Git-Tag: v209~110
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=489e4fbb8c04bf26bb363bfdf4bbcd1505398528;p=elogind.git

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 15e3247ac..a13bd4872 100644
--- 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)));