+ write_unlock_bh(&table->tb6_lock);
+
+ return err;
+}
+
+int ip6_del_rt(struct rt6_info *rt)
+{
+ return __ip6_del_rt(rt, NULL);
+}
+
+static int ip6_route_del(struct fib6_config *cfg)
+{
+ struct fib6_table *table;
+ struct fib6_node *fn;
+ struct rt6_info *rt;
+ int err = -ESRCH;
+
+ table = fib6_get_table(cfg->fc_table);
+ if (table == NULL)
+ return err;
+
+ read_lock_bh(&table->tb6_lock);
+
+ fn = fib6_locate(&table->tb6_root,
+ &cfg->fc_dst, cfg->fc_dst_len,
+ &cfg->fc_src, cfg->fc_src_len);
+
+ if (fn) {
+ for (rt = fn->leaf; rt; rt = rt->u.next) {
+ if (cfg->fc_ifindex &&
+ (rt->rt6i_dev == NULL ||
+ rt->rt6i_dev->ifindex != cfg->fc_ifindex))
+ continue;
+ if (cfg->fc_flags & RTF_GATEWAY &&
+ !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway))
+ continue;
+ if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric)
+ continue;
+ dst_hold(&rt->u.dst);
+ read_unlock_bh(&table->tb6_lock);
+
+ return __ip6_del_rt(rt, &cfg->fc_nlinfo);
+ }
+ }
+ read_unlock_bh(&table->tb6_lock);
+
+ return err;
+}
+
+/*
+ * Handle redirects
+ */
+struct ip6rd_flowi {
+ struct flowi fl;
+ struct in6_addr gateway;
+};
+
+static struct rt6_info *__ip6_route_redirect(struct fib6_table *table,
+ struct flowi *fl,
+ int flags)
+{
+ struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl;
+ struct rt6_info *rt;
+ struct fib6_node *fn;
+
+ /*
+ * Get the "current" route for this destination and
+ * check if the redirect has come from approriate router.
+ *
+ * RFC 2461 specifies that redirects should only be
+ * accepted if they come from the nexthop to the target.
+ * Due to the way the routes are chosen, this notion
+ * is a bit fuzzy and one might need to check all possible
+ * routes.
+ */
+
+ read_lock_bh(&table->tb6_lock);
+ fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
+restart:
+ for (rt = fn->leaf; rt; rt = rt->u.next) {
+ /*
+ * Current route is on-link; redirect is always invalid.
+ *
+ * Seems, previous statement is not true. It could
+ * be node, which looks for us as on-link (f.e. proxy ndisc)
+ * But then router serving it might decide, that we should
+ * know truth 8)8) --ANK (980726).
+ */
+ if (rt6_check_expired(rt))
+ continue;
+ if (!(rt->rt6i_flags & RTF_GATEWAY))
+ continue;
+ if (fl->oif != rt->rt6i_dev->ifindex)
+ continue;
+ if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway))
+ continue;
+ break;
+ }
+
+ if (!rt)
+ rt = &ip6_null_entry;
+ BACKTRACK(&fl->fl6_src);
+out:
+ dst_hold(&rt->u.dst);
+
+ read_unlock_bh(&table->tb6_lock);