ipv6: Move rt6_next from dst_entry into ipv6 route structure.

Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Eric Dumazet <edumazet@google.com>

diff --git a/include/net/dst.h b/include/net/dst.h
index cc7e816..acbb3fb 100644 (file)
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -101,7 +101,6 @@ struct dst_entry {
        struct lwtunnel_state   *lwtstate;
        union {
                struct dst_entry        *next;
-               struct rt6_info __rcu   *rt6_next;
        };
 };
 

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 10c9138..281a922 100644 (file)
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -129,6 +129,7 @@ struct rt6_exception {
 
 struct rt6_info {
        struct dst_entry                dst;
+       struct rt6_info __rcu           *rt6_next;
 
        /*
         * Tail elements of dst_entry (__refcnt etc.)
@@ -176,11 +177,11 @@ struct rt6_info {
 
 #define for_each_fib6_node_rt_rcu(fn)                                  \
        for (rt = rcu_dereference((fn)->leaf); rt;                      \
-            rt = rcu_dereference(rt->dst.rt6_next))
+            rt = rcu_dereference(rt->rt6_next))
 
 #define for_each_fib6_walker_rt(w)                                     \
        for (rt = (w)->leaf; rt;                                        \
-            rt = rcu_dereference_protected(rt->dst.rt6_next, 1))
+            rt = rcu_dereference_protected(rt->rt6_next, 1))
 
 static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
 {

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index f5285f4..c43cbae 100644 (file)
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -893,7 +893,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
        ins = &fn->leaf;
 
        for (iter = leaf; iter;
-            iter = rcu_dereference_protected(iter->dst.rt6_next,
+            iter = rcu_dereference_protected(iter->rt6_next,
                                lockdep_is_held(&rt->rt6i_table->tb6_lock))) {
                /*
                 *      Search for duplicates
@@ -950,7 +950,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
                        break;
 
 next_iter:
-               ins = &iter->dst.rt6_next;
+               ins = &iter->rt6_next;
        }
 
        if (fallback_ins && !found) {
@@ -979,7 +979,7 @@ next_iter:
                                              &sibling->rt6i_siblings);
                                break;
                        }
-                       sibling = rcu_dereference_protected(sibling->dst.rt6_next,
+                       sibling = rcu_dereference_protected(sibling->rt6_next,
                                    lockdep_is_held(&rt->rt6i_table->tb6_lock));
                }
                /* For each sibling in the list, increment the counter of
@@ -1009,7 +1009,7 @@ add:
                if (err)
                        return err;
 
-               rcu_assign_pointer(rt->dst.rt6_next, iter);
+               rcu_assign_pointer(rt->rt6_next, iter);
                atomic_inc(&rt->rt6i_ref);
                rcu_assign_pointer(rt->rt6i_node, fn);
                rcu_assign_pointer(*ins, rt);
@@ -1040,7 +1040,7 @@ add:
 
                atomic_inc(&rt->rt6i_ref);
                rcu_assign_pointer(rt->rt6i_node, fn);
-               rt->dst.rt6_next = iter->dst.rt6_next;
+               rt->rt6_next = iter->rt6_next;
                rcu_assign_pointer(*ins, rt);
                call_fib6_entry_notifiers(info->nl_net, FIB_EVENT_ENTRY_REPLACE,
                                          rt, extack);
@@ -1059,14 +1059,14 @@ add:
 
                if (nsiblings) {
                        /* Replacing an ECMP route, remove all siblings */
-                       ins = &rt->dst.rt6_next;
+                       ins = &rt->rt6_next;
                        iter = rcu_dereference_protected(*ins,
                                    lockdep_is_held(&rt->rt6i_table->tb6_lock));
                        while (iter) {
                                if (iter->rt6i_metric > rt->rt6i_metric)
                                        break;
                                if (rt6_qualify_for_ecmp(iter)) {
-                                       *ins = iter->dst.rt6_next;
+                                       *ins = iter->rt6_next;
                                        iter->rt6i_node = NULL;
                                        fib6_purge_rt(iter, fn, info->nl_net);
                                        if (rcu_access_pointer(fn->rr_ptr) == iter)
@@ -1075,7 +1075,7 @@ add:
                                        nsiblings--;
                                        info->nl_net->ipv6.rt6_stats->fib_rt_entries--;
                                } else {
-                                       ins = &iter->dst.rt6_next;
+                                       ins = &iter->rt6_next;
                                }
                                iter = rcu_dereference_protected(*ins,
                                        lockdep_is_held(&rt->rt6i_table->tb6_lock));
@@ -1644,7 +1644,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
        WARN_ON_ONCE(rt->rt6i_flags & RTF_CACHE);
 
        /* Unlink it */
-       *rtp = rt->dst.rt6_next;
+       *rtp = rt->rt6_next;
        rt->rt6i_node = NULL;
        net->ipv6.rt6_stats->fib_rt_entries--;
        net->ipv6.rt6_stats->fib_discarded_routes++;
@@ -1672,7 +1672,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
        FOR_WALKERS(net, w) {
                if (w->state == FWS_C && w->leaf == rt) {
                        RT6_TRACE("walker %p adjusted by delroute\n", w);
-                       w->leaf = rcu_dereference_protected(rt->dst.rt6_next,
+                       w->leaf = rcu_dereference_protected(rt->rt6_next,
                                            lockdep_is_held(&table->tb6_lock));
                        if (!w->leaf)
                                w->state = FWS_U;
@@ -1731,7 +1731,7 @@ int fib6_del(struct rt6_info *rt, struct nl_info *info)
                        fib6_del_route(table, fn, rtp, info);
                        return 0;
                }
-               rtp_next = &cur->dst.rt6_next;
+               rtp_next = &cur->rt6_next;
        }
        return -ENOENT;
 }
@@ -2208,7 +2208,7 @@ static int ipv6_route_yield(struct fib6_walker *w)
 
        do {
                iter->w.leaf = rcu_dereference_protected(
-                               iter->w.leaf->dst.rt6_next,
+                               iter->w.leaf->rt6_next,
                                lockdep_is_held(&iter->tbl->tb6_lock));
                iter->skip--;
                if (!iter->skip && iter->w.leaf)
@@ -2274,7 +2274,7 @@ static void *ipv6_route_seq_next(struct seq_file *seq, void *v, loff_t *pos)
        if (!v)
                goto iter_table;
 
-       n = rcu_dereference_bh(((struct rt6_info *)v)->dst.rt6_next);
+       n = rcu_dereference_bh(((struct rt6_info *)v)->rt6_next);
        if (n) {
                ++*pos;
                return n;

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7a8d150..22c5e70 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -502,7 +502,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
        if (!oif && ipv6_addr_any(saddr))
                goto out;
 
-       for (sprt = rt; sprt; sprt = rcu_dereference(sprt->dst.rt6_next)) {
+       for (sprt = rt; sprt; sprt = rcu_dereference(sprt->rt6_next)) {
                struct net_device *dev = sprt->dst.dev;
 
                if (oif) {
@@ -721,7 +721,7 @@ static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
 
        match = NULL;
        cont = NULL;
-       for (rt = rr_head; rt; rt = rcu_dereference(rt->dst.rt6_next)) {
+       for (rt = rr_head; rt; rt = rcu_dereference(rt->rt6_next)) {
                if (rt->rt6i_metric != metric) {
                        cont = rt;
                        break;
@@ -731,7 +731,7 @@ static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
        }
 
        for (rt = leaf; rt && rt != rr_head;
-            rt = rcu_dereference(rt->dst.rt6_next)) {
+            rt = rcu_dereference(rt->rt6_next)) {
                if (rt->rt6i_metric != metric) {
                        cont = rt;
                        break;
@@ -743,7 +743,7 @@ static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
        if (match || !cont)
                return match;
 
-       for (rt = cont; rt; rt = rcu_dereference(rt->dst.rt6_next))
+       for (rt = cont; rt; rt = rcu_dereference(rt->rt6_next))
                match = find_match(rt, oif, strict, &mpri, match, do_rr);
 
        return match;
@@ -781,7 +781,7 @@ static struct rt6_info *rt6_select(struct net *net, struct fib6_node *fn,
                             &do_rr);
 
        if (do_rr) {
-               struct rt6_info *next = rcu_dereference(rt0->dst.rt6_next);
+               struct rt6_info *next = rcu_dereference(rt0->rt6_next);
 
                /* no entries matched; do round-robin */
                if (!next || next->rt6i_metric != rt0->rt6i_metric)