ipv4: Dump route exceptions if requested

[tomoyo/tomoyo-test1.git] / net / ipv4 / route.c

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index b1628d2..6aee412 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2812,6 +2812,79 @@ nla_put_failure:
        return -EMSGSIZE;
 }
 
+static int fnhe_dump_bucket(struct net *net, struct sk_buff *skb,
+                           struct netlink_callback *cb, u32 table_id,
+                           struct fnhe_hash_bucket *bucket, int genid,
+                           int *fa_index, int fa_start)
+{
+       int i;
+
+       for (i = 0; i < FNHE_HASH_SIZE; i++) {
+               struct fib_nh_exception *fnhe;
+
+               for (fnhe = rcu_dereference(bucket[i].chain); fnhe;
+                    fnhe = rcu_dereference(fnhe->fnhe_next)) {
+                       struct rtable *rt;
+                       int err;
+
+                       if (*fa_index < fa_start)
+                               goto next;
+
+                       if (fnhe->fnhe_genid != genid)
+                               goto next;
+
+                       if (fnhe->fnhe_expires &&
+                           time_after(jiffies, fnhe->fnhe_expires))
+                               goto next;
+
+                       rt = rcu_dereference(fnhe->fnhe_rth_input);
+                       if (!rt)
+                               rt = rcu_dereference(fnhe->fnhe_rth_output);
+                       if (!rt)
+                               goto next;
+
+                       err = rt_fill_info(net, fnhe->fnhe_daddr, 0, rt,
+                                          table_id, NULL, skb,
+                                          NETLINK_CB(cb->skb).portid,
+                                          cb->nlh->nlmsg_seq);
+                       if (err)
+                               return err;
+next:
+                       (*fa_index)++;
+               }
+       }
+
+       return 0;
+}
+
+int fib_dump_info_fnhe(struct sk_buff *skb, struct netlink_callback *cb,
+                      u32 table_id, struct fib_info *fi,
+                      int *fa_index, int fa_start)
+{
+       struct net *net = sock_net(cb->skb->sk);
+       int nhsel, genid = fnhe_genid(net);
+
+       for (nhsel = 0; nhsel < fib_info_num_path(fi); nhsel++) {
+               struct fib_nh_common *nhc = fib_info_nhc(fi, nhsel);
+               struct fnhe_hash_bucket *bucket;
+               int err;
+
+               if (nhc->nhc_flags & RTNH_F_DEAD)
+                       continue;
+
+               bucket = rcu_dereference(nhc->nhc_exceptions);
+               if (!bucket)
+                       continue;
+
+               err = fnhe_dump_bucket(net, skb, cb, table_id, bucket, genid,
+                                      fa_index, fa_start);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
 static struct sk_buff *inet_rtm_getroute_build_skb(__be32 src, __be32 dst,
                                                   u8 ip_proto, __be16 sport,
                                                   __be16 dport)