ipv6: Never schedule DAD timer on dead address

[safe/jmp/linux-2.6] / net / ipv4 / ip_output.c

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index b78e615..9a4a6c9 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -51,6 +51,7 @@
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/highmem.h>
+#include <linux/slab.h>
 
 #include <linux/socket.h>
 #include <linux/sockios.h>
@@ -95,8 +96,8 @@ int __ip_local_out(struct sk_buff *skb)
 
        iph->tot_len = htons(skb->len);
        ip_send_check(iph);
-       return nf_hook(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, skb_dst(skb)->dev,
-                      dst_output);
+       return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
+                      skb_dst(skb)->dev, dst_output);
 }
 
 int ip_local_out(struct sk_buff *skb)
@@ -119,7 +120,7 @@ static int ip_dev_loopback_xmit(struct sk_buff *newskb)
        newskb->pkt_type = PACKET_LOOPBACK;
        newskb->ip_summed = CHECKSUM_UNNECESSARY;
        WARN_ON(!skb_dst(newskb));
-       netif_rx(newskb);
+       netif_rx_ni(newskb);
        return 0;
 }
 
@@ -254,7 +255,7 @@ int ip_mc_output(struct sk_buff *skb)
         */
 
        if (rt->rt_flags&RTCF_MULTICAST) {
-               if ((!sk || inet_sk(sk)->mc_loop)
+               if (sk_mc_loop(sk)
 #ifdef CONFIG_IP_MROUTE
                /* Small optimization: do not loopback not local frames,
                   which returned after forwarding; they will be  dropped
@@ -271,8 +272,8 @@ int ip_mc_output(struct sk_buff *skb)
                   ) {
                        struct sk_buff *newskb = skb_clone(skb, GFP_ATOMIC);
                        if (newskb)
-                               NF_HOOK(PF_INET, NF_INET_POST_ROUTING, newskb,
-                                       NULL, newskb->dev,
+                               NF_HOOK(NFPROTO_IPV4, NF_INET_POST_ROUTING,
+                                       newskb, NULL, newskb->dev,
                                        ip_dev_loopback_xmit);
                }
 
@@ -287,12 +288,12 @@ int ip_mc_output(struct sk_buff *skb)
        if (rt->rt_flags&RTCF_BROADCAST) {
                struct sk_buff *newskb = skb_clone(skb, GFP_ATOMIC);
                if (newskb)
-                       NF_HOOK(PF_INET, NF_INET_POST_ROUTING, newskb, NULL,
-                               newskb->dev, ip_dev_loopback_xmit);
+                       NF_HOOK(NFPROTO_IPV4, NF_INET_POST_ROUTING, newskb,
+                               NULL, newskb->dev, ip_dev_loopback_xmit);
        }
 
-       return NF_HOOK_COND(PF_INET, NF_INET_POST_ROUTING, skb, NULL, skb->dev,
-                           ip_finish_output,
+       return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING, skb, NULL,
+                           skb->dev, ip_finish_output,
                            !(IPCB(skb)->flags & IPSKB_REROUTED));
 }
 
@@ -305,22 +306,24 @@ int ip_output(struct sk_buff *skb)
        skb->dev = dev;
        skb->protocol = htons(ETH_P_IP);
 
-       return NF_HOOK_COND(PF_INET, NF_INET_POST_ROUTING, skb, NULL, dev,
+       return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING, skb, NULL, dev,
                            ip_finish_output,
                            !(IPCB(skb)->flags & IPSKB_REROUTED));
 }
 
-int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
+int ip_queue_xmit(struct sk_buff *skb)
 {
        struct sock *sk = skb->sk;
        struct inet_sock *inet = inet_sk(sk);
        struct ip_options *opt = inet->opt;
        struct rtable *rt;
        struct iphdr *iph;
+       int res;
 
        /* Skip all of this if the packet is already routed,
         * f.e. by something like SCTP.
         */
+       rcu_read_lock();
        rt = skb_rtable(skb);
        if (rt != NULL)
                goto packet_routed;
@@ -358,7 +361,7 @@ int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
                }
                sk_setup_caps(sk, &rt->u.dst);
        }
-       skb_dst_set(skb, dst_clone(&rt->u.dst));
+       skb_dst_set_noref(skb, &rt->u.dst);
 
 packet_routed:
        if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
@@ -369,7 +372,7 @@ packet_routed:
        skb_reset_network_header(skb);
        iph = ip_hdr(skb);
        *((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (inet->tos & 0xff));
-       if (ip_dont_fragment(sk, &rt->u.dst) && !ipfragok)
+       if (ip_dont_fragment(sk, &rt->u.dst) && !skb->local_df)
                iph->frag_off = htons(IP_DF);
        else
                iph->frag_off = 0;
@@ -390,9 +393,12 @@ packet_routed:
        skb->priority = sk->sk_priority;
        skb->mark = sk->sk_mark;
 
-       return ip_local_out(skb);
+       res = ip_local_out(skb);
+       rcu_read_unlock();
+       return res;
 
 no_route:
+       rcu_read_unlock();
        IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
        kfree_skb(skb);
        return -EHOSTUNREACH;
@@ -468,6 +474,10 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 
        hlen = iph->ihl * 4;
        mtu = dst_mtu(&rt->u.dst) - hlen;       /* Size of data space */
+#ifdef CONFIG_BRIDGE_NETFILTER
+       if (skb->nf_bridge)
+               mtu -= nf_bridge_mtu_reduction(skb);
+#endif
        IPCB(skb)->flags |= IPSKB_FRAG_COMPLETE;
 
        /* When frag_list is given, use it. First, check its validity:
@@ -503,8 +513,8 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
                        if (skb->sk) {
                                frag->sk = skb->sk;
                                frag->destructor = sock_wfree;
-                               truesizes += frag->truesize;
                        }
+                       truesizes += frag->truesize;
                }
 
                /* Everything is OK. Generate! */