Merge remote-tracking branches 'asoc/fix/adsp', 'asoc/fix/arizona', 'asoc/fix/atmel...

[linux-drm-fsl-dcu.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index f54e3a1010989ac93619d4984df4ed9b32aed521..a0a48ac3403f3a9284786aa5b8f00dc03696e2e0 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,6 +84,8 @@ static int             ip6_dst_gc(struct dst_ops *ops);
 
 static int             ip6_pkt_discard(struct sk_buff *skb);
 static int             ip6_pkt_discard_out(struct sk_buff *skb);
+static int             ip6_pkt_prohibit(struct sk_buff *skb);
+static int             ip6_pkt_prohibit_out(struct sk_buff *skb);
 static void            ip6_link_failure(struct sk_buff *skb);
 static void            ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
                                           struct sk_buff *skb, u32 mtu);
@@ -234,9 +236,6 @@ static const struct rt6_info ip6_null_entry_template = {
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
 
-static int ip6_pkt_prohibit(struct sk_buff *skb);
-static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-
 static const struct rt6_info ip6_prohibit_entry_template = {
        .dst = {
                .__refcnt       = ATOMIC_INIT(1),
@@ -619,7 +618,7 @@ static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict,
                goto out;
 
        m = rt6_score_route(rt, oif, strict);
-       if (m == RT6_NUD_FAIL_SOFT && !IS_ENABLED(CONFIG_IPV6_ROUTER_PREF)) {
+       if (m == RT6_NUD_FAIL_SOFT) {
                match_do_rr = true;
                m = 0; /* lowest valid score */
        } else if (m < 0) {
@@ -731,8 +730,11 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
                prefix = &prefix_buf;
        }
 
-       rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr,
-                               dev->ifindex);
+       if (rinfo->prefix_len == 0)
+               rt = rt6_get_dflt_router(gwaddr, dev);
+       else
+               rt = rt6_get_route_info(net, prefix, rinfo->prefix_len,
+                                       gwaddr, dev->ifindex);
 
        if (rt && !lifetime) {
                ip6_del_rt(rt);
@@ -871,11 +873,9 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
        rt = ip6_rt_copy(ort, daddr);
 
        if (rt) {
-               if (!(rt->rt6i_flags & RTF_GATEWAY)) {
-                       if (ort->rt6i_dst.plen != 128 &&
-                           ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
-                               rt->rt6i_flags |= RTF_ANYCAST;
-               }
+               if (ort->rt6i_dst.plen != 128 &&
+                   ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
+                       rt->rt6i_flags |= RTF_ANYCAST;
 
                rt->rt6i_flags |= RTF_CACHE;
 
@@ -1087,10 +1087,13 @@ static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie)
        if (rt->rt6i_genid != rt_genid_ipv6(dev_net(rt->dst.dev)))
                return NULL;
 
-       if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie))
-               return dst;
+       if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie))
+               return NULL;
 
-       return NULL;
+       if (rt6_check_expired(rt))
+               return NULL;
+
+       return dst;
 }
 
 static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
@@ -1160,7 +1163,6 @@ void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
        memset(&fl6, 0, sizeof(fl6));
        fl6.flowi6_oif = oif;
        fl6.flowi6_mark = mark;
-       fl6.flowi6_flags = 0;
        fl6.daddr = iph->daddr;
        fl6.saddr = iph->saddr;
        fl6.flowlabel = ip6_flowinfo(iph);
@@ -1259,7 +1261,6 @@ void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark)
        memset(&fl6, 0, sizeof(fl6));
        fl6.flowi6_oif = oif;
        fl6.flowi6_mark = mark;
-       fl6.flowi6_flags = 0;
        fl6.daddr = iph->daddr;
        fl6.saddr = iph->saddr;
        fl6.flowlabel = ip6_flowinfo(iph);
@@ -1281,7 +1282,6 @@ void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
        memset(&fl6, 0, sizeof(fl6));
        fl6.flowi6_oif = oif;
        fl6.flowi6_mark = mark;
-       fl6.flowi6_flags = 0;
        fl6.daddr = msg->dest;
        fl6.saddr = iph->daddr;
 
@@ -1564,21 +1564,24 @@ int ip6_route_add(struct fib6_config *cfg)
                                goto out;
                        }
                }
-               rt->dst.output = ip6_pkt_discard_out;
-               rt->dst.input = ip6_pkt_discard;
                rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
                switch (cfg->fc_type) {
                case RTN_BLACKHOLE:
                        rt->dst.error = -EINVAL;
+                       rt->dst.output = dst_discard;
+                       rt->dst.input = dst_discard;
                        break;
                case RTN_PROHIBIT:
                        rt->dst.error = -EACCES;
+                       rt->dst.output = ip6_pkt_prohibit_out;
+                       rt->dst.input = ip6_pkt_prohibit;
                        break;
                case RTN_THROW:
-                       rt->dst.error = -EAGAIN;
-                       break;
                default:
-                       rt->dst.error = -ENETUNREACH;
+                       rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN
+                                       : -ENETUNREACH;
+                       rt->dst.output = ip6_pkt_discard_out;
+                       rt->dst.input = ip6_pkt_discard;
                        break;
                }
                goto install_route;
@@ -2143,8 +2146,6 @@ static int ip6_pkt_discard_out(struct sk_buff *skb)
        return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-
 static int ip6_pkt_prohibit(struct sk_buff *skb)
 {
        return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
@@ -2156,8 +2157,6 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
        return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#endif
-
 /*
  *     Allocate a dst for local (unicast / anycast) address.
  */
@@ -2167,12 +2166,10 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
                                    bool anycast)
 {
        struct net *net = dev_net(idev->dev);
-       struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL);
-
-       if (!rt) {
-               net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n");
+       struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev,
+                                           DST_NOCOUNT, NULL);
+       if (!rt)
                return ERR_PTR(-ENOMEM);
-       }
 
        in6_dev_hold(idev);
 
@@ -2828,56 +2825,12 @@ static int ip6_route_dev_notify(struct notifier_block *this,
 
 #ifdef CONFIG_PROC_FS
 
-struct rt6_proc_arg
-{
-       char *buffer;
-       int offset;
-       int length;
-       int skip;
-       int len;
-};
-
-static int rt6_info_route(struct rt6_info *rt, void *p_arg)
-{
-       struct seq_file *m = p_arg;
-
-       seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen);
-
-#ifdef CONFIG_IPV6_SUBTREES
-       seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen);
-#else
-       seq_puts(m, "00000000000000000000000000000000 00 ");
-#endif
-       if (rt->rt6i_flags & RTF_GATEWAY) {
-               seq_printf(m, "%pi6", &rt->rt6i_gateway);
-       } else {
-               seq_puts(m, "00000000000000000000000000000000");
-       }
-       seq_printf(m, " %08x %08x %08x %08x %8s\n",
-                  rt->rt6i_metric, atomic_read(&rt->dst.__refcnt),
-                  rt->dst.__use, rt->rt6i_flags,
-                  rt->dst.dev ? rt->dst.dev->name : "");
-       return 0;
-}
-
-static int ipv6_route_show(struct seq_file *m, void *v)
-{
-       struct net *net = (struct net *)m->private;
-       fib6_clean_all_ro(net, rt6_info_route, 0, m);
-       return 0;
-}
-
-static int ipv6_route_open(struct inode *inode, struct file *file)
-{
-       return single_open_net(inode, file, ipv6_route_show);
-}
-
 static const struct file_operations ipv6_route_proc_fops = {
        .owner          = THIS_MODULE,
        .open           = ipv6_route_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
-       .release        = single_release_net,
+       .release        = seq_release_net,
 };
 
 static int rt6_stats_seq_show(struct seq_file *seq, void *v)