2 files changed, 19 insertions, 28 deletions

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index e7bbff4340bb..9831fd2c73a0 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -753,7 +753,7 @@ static void icmp_redirect(struct sk_buff *skb)
         case ICMP_REDIR_HOST:
         case ICMP_REDIR_HOSTTOS:
                 ip_rt_redirect(skb->nh.iph->saddr, ip, skb->h.icmph->un.gateway,
-                               iph->saddr, iph->tos, skb->dev);
+                               iph->saddr, skb->dev);
                 break;
         }
 out:
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fca5fe0cf94a..94fcbc5e5a1b 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -55,6 +55,8 @@
  *      Robert Olsson           :       Added rt_cache statistics
  *      Arnaldo C. Melo         :       Convert proc stuff to seq_file
  *      Eric Dumazet            :       hashed spinlocks and rt_check_expire() fixes.
+ *      Ilia Sotnikov           :       Ignore TOS on PMTUD and Redirect
+ *      Ilia Sotnikov           :       Removed TOS from hash calculations
  *
  *              This program is free software; you can redistribute it and/or
  *              modify it under the terms of the GNU General Public License
@@ -247,9 +249,9 @@ static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat);
 static int rt_intern_hash(unsigned hash, struct rtable *rth,
                                 struct rtable **res);
 
-static unsigned int rt_hash_code(u32 daddr, u32 saddr, u8 tos)
+static unsigned int rt_hash_code(u32 daddr, u32 saddr)
 {
-        return (jhash_3words(daddr, saddr, (u32) tos, rt_hash_rnd)
+        return (jhash_2words(daddr, saddr, rt_hash_rnd)
                 & rt_hash_mask);
 }
 
@@ -1111,7 +1113,7 @@ static void rt_del(unsigned hash, struct rtable *rt)
 }
 
 void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw,
-                    u32 saddr, u8 tos, struct net_device *dev)
+                    u32 saddr, struct net_device *dev)
 {
         int i, k;
         struct in_device *in_dev = in_dev_get(dev);
@@ -1119,8 +1121,6 @@ void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw,
         u32  skeys[2] = { saddr, 0 };
         int  ikeys[2] = { dev->ifindex, 0 };
 
-        tos &= IPTOS_RT_MASK;
-
         if (!in_dev)
                 return;
 
@@ -1141,8 +1141,7 @@ void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw,
         for (i = 0; i < 2; i++) {
                 for (k = 0; k < 2; k++) {
                         unsigned hash = rt_hash_code(daddr,
-                                                     skeys[i] ^ (ikeys[k] << 5),
-                                                     tos);
+                                                     skeys[i] ^ (ikeys[k] << 5));
 
                         rthp=&rt_hash_table[hash].chain;
 
@@ -1152,7 +1151,6 @@ void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw,
 
                                 if (rth->fl.fl4_dst != daddr ||
                                     rth->fl.fl4_src != skeys[i] ||
-                                    rth->fl.fl4_tos != tos ||
                                     rth->fl.oif != ikeys[k] ||
                                     rth->fl.iif != 0) {
                                         rthp = &rth->u.rt_next;
@@ -1232,10 +1230,9 @@ reject_redirect:
         if (IN_DEV_LOG_MARTIANS(in_dev) && net_ratelimit())
                 printk(KERN_INFO "Redirect from %u.%u.%u.%u on %s about "
                         "%u.%u.%u.%u ignored.\n"
-                        "  Advised path = %u.%u.%u.%u -> %u.%u.%u.%u, "
-                        "tos %02x\n",
+                        "  Advised path = %u.%u.%u.%u -> %u.%u.%u.%u\n",
                        NIPQUAD(old_gw), dev->name, NIPQUAD(new_gw),
-                       NIPQUAD(saddr), NIPQUAD(daddr), tos);
+                       NIPQUAD(saddr), NIPQUAD(daddr));
 #endif
         in_dev_put(in_dev);
 }
@@ -1253,8 +1250,7 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
                            rt->u.dst.expires) {
                         unsigned hash = rt_hash_code(rt->fl.fl4_dst,
                                                      rt->fl.fl4_src ^
-                                                        (rt->fl.oif << 5),
-                                                     rt->fl.fl4_tos);
+                                                        (rt->fl.oif << 5));
 #if RT_CACHE_DEBUG >= 1
                         printk(KERN_DEBUG "ip_rt_advice: redirect to "
                                           "%u.%u.%u.%u/%02x dropped\n",
@@ -1391,14 +1387,13 @@ unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu)
         struct rtable *rth;
         u32  skeys[2] = { iph->saddr, 0, };
         u32  daddr = iph->daddr;
-        u8   tos = iph->tos & IPTOS_RT_MASK;
         unsigned short est_mtu = 0;
 
         if (ipv4_config.no_pmtu_disc)
                 return 0;
 
         for (i = 0; i < 2; i++) {
-                unsigned hash = rt_hash_code(daddr, skeys[i], tos);
+                unsigned hash = rt_hash_code(daddr, skeys[i]);
 
                 rcu_read_lock();
                 for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
@@ -1407,7 +1402,6 @@ unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu)
                             rth->fl.fl4_src == skeys[i] &&
                             rth->rt_dst  == daddr &&
                             rth->rt_src  == iph->saddr &&
-                            rth->fl.fl4_tos == tos &&
                             rth->fl.iif == 0 &&
                             !(dst_metric_locked(&rth->u.dst, RTAX_MTU))) {
                                 unsigned short mtu = new_mtu;
@@ -1658,7 +1652,7 @@ static int ip_route_input_mc(struct sk_buff *skb, u32 daddr, u32 saddr,
         RT_CACHE_STAT_INC(in_slow_mc);
 
         in_dev_put(in_dev);
-        hash = rt_hash_code(daddr, saddr ^ (dev->ifindex << 5), tos);
+        hash = rt_hash_code(daddr, saddr ^ (dev->ifindex << 5));
         return rt_intern_hash(hash, rth, (struct rtable**) &skb->dst);
 
 e_nobufs:
@@ -1823,7 +1817,7 @@ static inline int ip_mkroute_input_def(struct sk_buff *skb,
                 return err;
 
         /* put it into the cache */
-        hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5), tos);
+        hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5));
         return rt_intern_hash(hash, rth, (struct rtable**)&skb->dst);   
 }
 
@@ -1864,7 +1858,7 @@ static inline int ip_mkroute_input(struct sk_buff *skb,
                         return err;
 
                 /* put it into the cache */
-                hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5), tos);
+                hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5));
                 err = rt_intern_hash(hash, rth, &rtres);
                 if (err)
                         return err;
@@ -2041,7 +2035,7 @@ local_input:
                 rth->rt_flags   &= ~RTCF_LOCAL;
         }
         rth->rt_type    = res.type;
-        hash = rt_hash_code(daddr, saddr ^ (fl.iif << 5), tos);
+        hash = rt_hash_code(daddr, saddr ^ (fl.iif << 5));
         err = rt_intern_hash(hash, rth, (struct rtable**)&skb->dst);
         goto done;
 
@@ -2088,7 +2082,7 @@ int ip_route_input(struct sk_buff *skb, u32 daddr, u32 saddr,
         int iif = dev->ifindex;
 
         tos &= IPTOS_RT_MASK;
-        hash = rt_hash_code(daddr, saddr ^ (iif << 5), tos);
+        hash = rt_hash_code(daddr, saddr ^ (iif << 5));
 
         rcu_read_lock();
         for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
@@ -2286,10 +2280,8 @@ static inline int ip_mkroute_output_def(struct rtable **rp,
         int err = __mkroute_output(&rth, res, fl, oldflp, dev_out, flags);
         unsigned hash;
         if (err == 0) {
-                u32 tos = RT_FL_TOS(oldflp);
-
                 hash = rt_hash_code(oldflp->fl4_dst, 
-                                    oldflp->fl4_src ^ (oldflp->oif << 5), tos);
+                                    oldflp->fl4_src ^ (oldflp->oif << 5));
                 err = rt_intern_hash(hash, rth, rp);
         }
         
@@ -2304,7 +2296,6 @@ static inline int ip_mkroute_output(struct rtable** rp,
                                     unsigned flags)
 {
 #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-        u32 tos = RT_FL_TOS(oldflp);
         unsigned char hop;
         unsigned hash;
         int err = -EINVAL;
@@ -2334,7 +2325,7 @@ static inline int ip_mkroute_output(struct rtable** rp,
 
                         hash = rt_hash_code(oldflp->fl4_dst, 
                                             oldflp->fl4_src ^
-                                            (oldflp->oif << 5), tos);
+                                            (oldflp->oif << 5));
                         err = rt_intern_hash(hash, rth, rp);
 
                         /* forward hop information to multipath impl. */
@@ -2563,7 +2554,7 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
         unsigned hash;
         struct rtable *rth;
 
-        hash = rt_hash_code(flp->fl4_dst, flp->fl4_src ^ (flp->oif << 5), flp->fl4_tos);
+        hash = rt_hash_code(flp->fl4_dst, flp->fl4_src ^ (flp->oif << 5));
 
         rcu_read_lock_bh();
         for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;