[IPv6] route: Simplify ip6_del_rt()

Provide a simple ip6_del_rt() for the majority of users and
an alternative for the exception via netlink. Avoids code
obfuscation.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 17 insertions, 11 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f1ede9004887..27f2e3309598 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -736,7 +736,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 
                 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
                         if (onlink == 0) {
-                                ip6_del_rt(rt, NULL, NULL, NULL);
+                                ip6_del_rt(rt);
                                 rt = NULL;
                         } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
                                 rt->rt6i_expires = expires;
@@ -1662,7 +1662,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
                 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
                         if (rt->rt6i_flags&RTF_EXPIRES) {
                                 if (valid_lft == 0) {
-                                        ip6_del_rt(rt, NULL, NULL, NULL);
+                                        ip6_del_rt(rt);
                                         rt = NULL;
                                 } else {
                                         rt->rt6i_expires = jiffies + rt_expires;
@@ -3557,7 +3557,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
                         addrconf_leave_anycast(ifp);
                 addrconf_leave_solict(ifp->idev, &ifp->addr);
                 dst_hold(&ifp->rt->u.dst);
-                if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
+                if (ip6_del_rt(ifp->rt))
                         dst_free(&ifp->rt->u.dst);
                 break;
         }
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 5743e8bffefd..419d65163819 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -961,7 +961,7 @@ static void ndisc_recv_na(struct sk_buff *skb)
                         struct rt6_info *rt;
                         rt = rt6_get_dflt_router(saddr, dev);
                         if (rt)
-                                ip6_del_rt(rt, NULL, NULL, NULL);
+                                ip6_del_rt(rt);
                 }
 
 out:
@@ -1114,7 +1114,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 
         if (rt && lifetime == 0) {
                 neigh_clone(neigh);
-                ip6_del_rt(rt, NULL, NULL, NULL);
+                ip6_del_rt(rt);
                 rt = NULL;
         }
 
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1aca787ead85..8d511de0db1b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -457,7 +457,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
         rt = rt6_get_route_info(prefix, rinfo->prefix_len, gwaddr, dev->ifindex);
 
         if (rt && !lifetime) {
-                ip6_del_rt(rt, NULL, NULL, NULL);
+                ip6_del_rt(rt);
                 rt = NULL;
         }
 
@@ -813,7 +813,7 @@ static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
 
         if (rt) {
                 if (rt->rt6i_flags & RTF_CACHE)
-                        ip6_del_rt(rt, NULL, NULL, NULL);
+                        ip6_del_rt(rt);
                 else
                         dst_release(dst);
         }
@@ -1218,7 +1218,8 @@ out:
         return err;
 }
 
-int ip6_del_rt(struct rt6_info *rt, struct nlmsghdr *nlh, void *_rtattr, struct netlink_skb_parms *req)
+static int __ip6_del_rt(struct rt6_info *rt, struct nlmsghdr *nlh,
+                        void *_rtattr, struct netlink_skb_parms *req)
 {
         int err;
         struct fib6_table *table;
@@ -1237,6 +1238,11 @@ int ip6_del_rt(struct rt6_info *rt, struct nlmsghdr *nlh, void *_rtattr, struct
         return err;
 }
 
+int ip6_del_rt(struct rt6_info *rt)
+{
+        return __ip6_del_rt(rt, NULL, NULL, NULL);
+}
+
 static int ip6_route_del(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
                          void *_rtattr, struct netlink_skb_parms *req,
                          u32 table_id)
@@ -1271,7 +1277,7 @@ static int ip6_route_del(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
                         dst_hold(&rt->u.dst);
                         read_unlock_bh(&table->tb6_lock);
 
-                        return ip6_del_rt(rt, nlh, _rtattr, req);
+                        return __ip6_del_rt(rt, nlh, _rtattr, req);
                 }
         }
         read_unlock_bh(&table->tb6_lock);
@@ -1395,7 +1401,7 @@ restart:
         call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
 
         if (rt->rt6i_flags&RTF_CACHE) {
-                ip6_del_rt(rt, NULL, NULL, NULL);
+                ip6_del_rt(rt);
                 return;
         }
 
@@ -1631,7 +1637,7 @@ restart:
                 if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
                         dst_hold(&rt->u.dst);
                         read_unlock_bh(&table->tb6_lock);
-                        ip6_del_rt(rt, NULL, NULL, NULL);
+                        ip6_del_rt(rt);
                         goto restart;
                 }
         }