[IPV6]: Always pass a valid nl_info to inet6_rt_notify.

This makes the code in the inet6_rt_notify more straightforward and provides
groud for namespace passing.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 14 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 11ef456d67c5..b80ef5784207 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -609,7 +609,8 @@ static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
 
 int ip6_ins_rt(struct rt6_info *rt)
 {
-        return __ip6_ins_rt(rt, NULL);
+        struct nl_info info = {};
+        return __ip6_ins_rt(rt, &info);
 }
 
 static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
@@ -1266,7 +1267,8 @@ static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
 
 int ip6_del_rt(struct rt6_info *rt)
 {
-        return __ip6_del_rt(rt, NULL);
+        struct nl_info info = {};
+        return __ip6_del_rt(rt, &info);
 }
 
 static int ip6_route_del(struct fib6_config *cfg)
@@ -2243,29 +2245,26 @@ errout:
 void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
 {
         struct sk_buff *skb;
-        u32 pid = 0, seq = 0;
-        struct nlmsghdr *nlh = NULL;
-        int err = -ENOBUFS;
-
-        if (info) {
-                pid = info->pid;
-                nlh = info->nlh;
-                if (nlh)
-                        seq = nlh->nlmsg_seq;
-        }
+        u32 seq;
+        int err;
+
+        err = -ENOBUFS;
+        seq = info->nlh != NULL ? info->nlh->nlmsg_seq : 0;
 
         skb = nlmsg_new(rt6_nlmsg_size(), gfp_any());
         if (skb == NULL)
                 goto errout;
 
-        err = rt6_fill_node(skb, rt, NULL, NULL, 0, event, pid, seq, 0, 0);
+        err = rt6_fill_node(skb, rt, NULL, NULL, 0,
+                                event, info->pid, seq, 0, 0);
         if (err < 0) {
                 /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */
                 WARN_ON(err == -EMSGSIZE);
                 kfree_skb(skb);
                 goto errout;
         }
-        err = rtnl_notify(skb, &init_net, pid, RTNLGRP_IPV6_ROUTE, nlh, gfp_any());
+        err = rtnl_notify(skb, &init_net, info->pid,
+                                RTNLGRP_IPV6_ROUTE, info->nlh, gfp_any());
 errout:
         if (err < 0)
                 rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_ROUTE, err);