[IPV4]: Convert ipv4 route to use the new dst_entry 'next' pointer

This patch removes the rt_next pointer from 'struct rtable.u' union,
and renames u.rt_next to u.dst_rt_next.

It also moves 'struct flowi' right after 'struct dst_entry' to prepare
the gain on lookups.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 28 insertions, 28 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 56d6602affb..5b3834b38a2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -289,7 +289,7 @@ static struct rtable *rt_cache_get_next(struct seq_file *seq, struct rtable *r)
 {
         struct rt_cache_iter_state *st = rcu_dereference(seq->private);
 
-        r = r->u.rt_next;
+        r = r->u.dst.rt_next;
         while (!r) {
                 rcu_read_unlock_bh();
                 if (--st->bucket < 0)
@@ -512,7 +512,7 @@ static __inline__ int rt_fast_clean(struct rtable *rth)
         /* Kill broadcast/multicast entries very aggresively, if they
            collide in hash table with more useful entries */
         return (rth->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST)) &&
-                rth->fl.iif && rth->u.rt_next;
+                rth->fl.iif && rth->u.dst.rt_next;
 }
 
 static __inline__ int rt_valuable(struct rtable *rth)
@@ -595,10 +595,10 @@ static struct rtable **rt_remove_balanced_route(struct rtable **chain_head,
                 if (((*rthp)->u.dst.flags & DST_BALANCED) != 0  &&
                     compare_keys(&(*rthp)->fl, &expentry->fl)) {
                         if (*rthp == expentry) {
-                                *rthp = rth->u.rt_next;
+                                *rthp = rth->u.dst.rt_next;
                                 continue;
                         } else {
-                                *rthp = rth->u.rt_next;
+                                *rthp = rth->u.dst.rt_next;
                                 rt_free(rth);
                                 if (removed_count)
                                         ++(*removed_count);
@@ -606,9 +606,9 @@ static struct rtable **rt_remove_balanced_route(struct rtable **chain_head,
                 } else {
                         if (!((*rthp)->u.dst.flags & DST_BALANCED) &&
                             passedexpired && !nextstep)
-                                nextstep = &rth->u.rt_next;
+                                nextstep = &rth->u.dst.rt_next;
 
-                        rthp = &rth->u.rt_next;
+                        rthp = &rth->u.dst.rt_next;
                 }
         }
 
@@ -649,12 +649,12 @@ static void rt_check_expire(unsigned long dummy)
                                 /* Entry is expired even if it is in use */
                                 if (time_before_eq(now, rth->u.dst.expires)) {
                                         tmo >>= 1;
-                                        rthp = &rth->u.rt_next;
+                                        rthp = &rth->u.dst.rt_next;
                                         continue;
                                 }
                         } else if (!rt_may_expire(rth, tmo, ip_rt_gc_timeout)) {
                                 tmo >>= 1;
-                                rthp = &rth->u.rt_next;
+                                rthp = &rth->u.dst.rt_next;
                                 continue;
                         }
 
@@ -668,11 +668,11 @@ static void rt_check_expire(unsigned long dummy)
                                 if (!rthp)
                                         break;
                         } else {
-                                *rthp = rth->u.rt_next;
+                                *rthp = rth->u.dst.rt_next;
                                 rt_free(rth);
                         }
 #else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
-                        *rthp = rth->u.rt_next;
+                        *rthp = rth->u.dst.rt_next;
                         rt_free(rth);
 #endif /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
                 }
@@ -706,7 +706,7 @@ static void rt_run_flush(unsigned long dummy)
                 spin_unlock_bh(rt_hash_lock_addr(i));
 
                 for (; rth; rth = next) {
-                        next = rth->u.rt_next;
+                        next = rth->u.dst.rt_next;
                         rt_free(rth);
                 }
         }
@@ -840,7 +840,7 @@ static int rt_garbage_collect(void)
                         while ((rth = *rthp) != NULL) {
                                 if (!rt_may_expire(rth, tmo, expire)) {
                                         tmo >>= 1;
-                                        rthp = &rth->u.rt_next;
+                                        rthp = &rth->u.dst.rt_next;
                                         continue;
                                 }
 #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
@@ -858,12 +858,12 @@ static int rt_garbage_collect(void)
                                         if (!rthp)
                                                 break;
                                 } else {
-                                        *rthp = rth->u.rt_next;
+                                        *rthp = rth->u.dst.rt_next;
                                         rt_free(rth);
                                         goal--;
                                 }
 #else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
-                                *rthp = rth->u.rt_next;
+                                *rthp = rth->u.dst.rt_next;
                                 rt_free(rth);
                                 goal--;
 #endif /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
@@ -947,13 +947,13 @@ restart:
                 if (compare_keys(&rth->fl, &rt->fl)) {
 #endif
                         /* Put it first */
-                        *rthp = rth->u.rt_next;
+                        *rthp = rth->u.dst.rt_next;
                         /*
                          * Since lookup is lockfree, the deletion
                          * must be visible to another weakly ordered CPU before
                          * the insertion at the start of the hash chain.
                          */
-                        rcu_assign_pointer(rth->u.rt_next,
+                        rcu_assign_pointer(rth->u.dst.rt_next,
                                            rt_hash_table[hash].chain);
                         /*
                          * Since lookup is lockfree, the update writes
@@ -983,7 +983,7 @@ restart:
 
                 chain_length++;
 
-                rthp = &rth->u.rt_next;
+                rthp = &rth->u.dst.rt_next;
         }
 
         if (cand) {
@@ -994,7 +994,7 @@ restart:
                  * only 2 entries per bucket. We will see.
                  */
                 if (chain_length > ip_rt_gc_elasticity) {
-                        *candp = cand->u.rt_next;
+                        *candp = cand->u.dst.rt_next;
                         rt_free(cand);
                 }
         }
@@ -1034,13 +1034,13 @@ restart:
                 }
         }
 
-        rt->u.rt_next = rt_hash_table[hash].chain;
+        rt->u.dst.rt_next = rt_hash_table[hash].chain;
 #if RT_CACHE_DEBUG >= 2
-        if (rt->u.rt_next) {
+        if (rt->u.dst.rt_next) {
                 struct rtable *trt;
                 printk(KERN_DEBUG "rt_cache @%02x: %u.%u.%u.%u", hash,
                        NIPQUAD(rt->rt_dst));
-                for (trt = rt->u.rt_next; trt; trt = trt->u.rt_next)
+                for (trt = rt->u.dst.rt_next; trt; trt = trt->u.dst.rt_next)
                         printk(" . %u.%u.%u.%u", NIPQUAD(trt->rt_dst));
                 printk("\n");
         }
@@ -1117,9 +1117,9 @@ static void rt_del(unsigned hash, struct rtable *rt)
         spin_lock_bh(rt_hash_lock_addr(hash));
         ip_rt_put(rt);
         for (rthp = &rt_hash_table[hash].chain; *rthp;
-             rthp = &(*rthp)->u.rt_next)
+             rthp = &(*rthp)->u.dst.rt_next)
                 if (*rthp == rt) {
-                        *rthp = rt->u.rt_next;
+                        *rthp = rt->u.dst.rt_next;
                         rt_free(rt);
                         break;
                 }
@@ -1167,7 +1167,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
                                     rth->fl.fl4_src != skeys[i] ||
                                     rth->fl.oif != ikeys[k] ||
                                     rth->fl.iif != 0) {
-                                        rthp = &rth->u.rt_next;
+                                        rthp = &rth->u.dst.rt_next;
                                         continue;
                                 }
 
@@ -1416,7 +1416,7 @@ unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu)
 
                 rcu_read_lock();
                 for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
-                     rth = rcu_dereference(rth->u.rt_next)) {
+                     rth = rcu_dereference(rth->u.dst.rt_next)) {
                         if (rth->fl.fl4_dst == daddr &&
                             rth->fl.fl4_src == skeys[i] &&
                             rth->rt_dst  == daddr &&
@@ -2099,7 +2099,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 
         rcu_read_lock();
         for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
-             rth = rcu_dereference(rth->u.rt_next)) {
+             rth = rcu_dereference(rth->u.dst.rt_next)) {
                 if (rth->fl.fl4_dst == daddr &&
                     rth->fl.fl4_src == saddr &&
                     rth->fl.iif == iif &&
@@ -2563,7 +2563,7 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
 
         rcu_read_lock_bh();
         for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
-                rth = rcu_dereference(rth->u.rt_next)) {
+                rth = rcu_dereference(rth->u.dst.rt_next)) {
                 if (rth->fl.fl4_dst == flp->fl4_dst &&
                     rth->fl.fl4_src == flp->fl4_src &&
                     rth->fl.iif == 0 &&
@@ -2825,7 +2825,7 @@ int ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb)
                         s_idx = 0;
                 rcu_read_lock_bh();
                 for (rt = rcu_dereference(rt_hash_table[h].chain), idx = 0; rt;
-                     rt = rcu_dereference(rt->u.rt_next), idx++) {
+                     rt = rcu_dereference(rt->u.dst.rt_next), idx++) {
                         if (idx < s_idx)
                                 continue;
                         skb->dst = dst_clone(&rt->u.dst);