ipv4: Remove 'rt_dst' from 'struct rtable'

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 37 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 264617c98c25..85d103fee88e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -850,7 +850,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
                     peer->rate_tokens == ip_rt_redirect_number)
                         net_warn_ratelimited("host %pI4/if%d ignores redirects for %pI4 to %pI4\n",
                                              &ip_hdr(skb)->saddr, rt->rt_iif,
-                                             &rt->rt_dst, &rt->rt_gateway);
+                                             &ip_hdr(skb)->daddr, &rt->rt_gateway);
 #endif
         }
 out_put_peer:
@@ -1132,8 +1132,7 @@ static unsigned int ipv4_mtu(const struct dst_entry *dst)
         mtu = dst->dev->mtu;
 
         if (unlikely(dst_metric_locked(dst, RTAX_MTU))) {
-
-                if (rt->rt_gateway != rt->rt_dst && mtu > 576)
+                if (rt->rt_gateway != 0 && mtu > 576)
                         mtu = 576;
         }
 
@@ -1271,7 +1270,6 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
         rth->rt_genid   = rt_genid(dev_net(dev));
         rth->rt_flags   = RTCF_MULTICAST;
         rth->rt_type    = RTN_MULTICAST;
-        rth->rt_dst     = daddr;
         rth->rt_route_iif = dev->ifindex;
         rth->rt_iif     = dev->ifindex;
         rth->rt_oif     = 0;
@@ -1390,7 +1388,6 @@ static int __mkroute_input(struct sk_buff *skb,
         rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
         rth->rt_flags = flags;
         rth->rt_type = res->type;
-        rth->rt_dst     = daddr;
         rth->rt_route_iif = in_dev->dev->ifindex;
         rth->rt_iif     = in_dev->dev->ifindex;
         rth->rt_oif     = 0;
@@ -1556,7 +1553,6 @@ local_input:
         rth->rt_genid = rt_genid(net);
         rth->rt_flags   = flags|RTCF_LOCAL;
         rth->rt_type    = res.type;
-        rth->rt_dst     = daddr;
         rth->rt_route_iif = dev->ifindex;
         rth->rt_iif     = dev->ifindex;
         rth->rt_oif     = 0;
@@ -1707,7 +1703,6 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
         rth->rt_genid = rt_genid(dev_net(dev_out));
         rth->rt_flags   = flags;
         rth->rt_type    = type;
-        rth->rt_dst     = fl4->daddr;
         rth->rt_route_iif = 0;
         rth->rt_iif     = orig_oif ? : dev_out->ifindex;
         rth->rt_oif     = orig_oif;
@@ -1995,7 +1990,6 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
                 rt->rt_genid = rt_genid(net);
                 rt->rt_flags = ort->rt_flags;
                 rt->rt_type = ort->rt_type;
-                rt->rt_dst = ort->rt_dst;
                 rt->rt_gateway = ort->rt_gateway;
                 rt->fi = ort->fi;
                 if (rt->fi)
@@ -2026,9 +2020,9 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
 }
 EXPORT_SYMBOL_GPL(ip_route_output_flow);
 
-static int rt_fill_info(struct net *net,  __be32 src, struct flowi4 *fl4,
-                        struct sk_buff *skb, u32 pid, u32 seq, int event,
-                        int nowait, unsigned int flags)
+static int rt_fill_info(struct net *net,  __be32 dst, __be32 src,
+                        struct flowi4 *fl4, struct sk_buff *skb, u32 pid,
+                        u32 seq, int event, int nowait, unsigned int flags)
 {
         struct rtable *rt = skb_rtable(skb);
         struct rtmsg *r;
@@ -2056,7 +2050,7 @@ static int rt_fill_info(struct net *net,  __be32 src, struct flowi4 *fl4,
         if (rt->rt_flags & RTCF_NOTIFY)
                 r->rtm_flags |= RTM_F_NOTIFY;
 
-        if (nla_put_be32(skb, RTA_DST, rt->rt_dst))
+        if (nla_put_be32(skb, RTA_DST, dst))
                 goto nla_put_failure;
         if (src) {
                 r->rtm_src_len = 32;
@@ -2100,29 +2094,8 @@ static int rt_fill_info(struct net *net,  __be32 src, struct flowi4 *fl4,
         }
 
         if (rt_is_input_route(rt)) {
-#ifdef CONFIG_IP_MROUTE
-                __be32 dst = rt->rt_dst;
-
-                if (ipv4_is_multicast(dst) && !ipv4_is_local_multicast(dst) &&
-                    IPV4_DEVCONF_ALL(net, MC_FORWARDING)) {
-                        int err = ipmr_get_route(net, skb,
-                                                 fl4->saddr, fl4->daddr,
-                                                 r, nowait);
-                        if (err <= 0) {
-                                if (!nowait) {
-                                        if (err == 0)
-                                                return 0;
-                                        goto nla_put_failure;
-                                } else {
-                                        if (err == -EMSGSIZE)
-                                                goto nla_put_failure;
-                                        error = err;
-                                }
-                        }
-                } else
-#endif
-                        if (nla_put_u32(skb, RTA_IIF, rt->rt_iif))
-                                goto nla_put_failure;
+                if (nla_put_u32(skb, RTA_IIF, rt->rt_iif))
+                        goto nla_put_failure;
         }
 
         if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0)
@@ -2217,7 +2190,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void
         if (rtm->rtm_flags & RTM_F_NOTIFY)
                 rt->rt_flags |= RTCF_NOTIFY;
 
-        err = rt_fill_info(net, src, &fl4, skb,
+        err = rt_fill_info(net, dst, src, &fl4, skb,
                            NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
                            RTM_NEWROUTE, 0, 0);
         if (err <= 0)
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index f73ba8210bd3..6074b694f118 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -91,7 +91,6 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
         xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST |
                                               RTCF_LOCAL);
         xdst->u.rt.rt_type = rt->rt_type;
-        xdst->u.rt.rt_dst = rt->rt_dst;
         xdst->u.rt.rt_gateway = rt->rt_gateway;
         xdst->u.rt.rt_pmtu = rt->rt_pmtu;