--- /dev/null
+diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
+index 005e2c2..a6a1df4 100644
+--- a/include/net/netns/ipv6.h
++++ b/include/net/netns/ipv6.h
+@@ -55,6 +55,7 @@ struct netns_ipv6 {
+ unsigned long ip6_rt_last_gc;
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ struct rt6_info *ip6_prohibit_entry;
++ struct rt6_info *ip6_failed_policy_entry;
+ struct rt6_info *ip6_blk_hole_entry;
+ struct fib6_table *fib6_local_tbl;
+ struct fib_rules_ops *fib6_rules_ops;
+diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
+index 51da65b..1429852 100644
+--- a/include/uapi/linux/fib_rules.h
++++ b/include/uapi/linux/fib_rules.h
+@@ -64,6 +64,10 @@ enum {
+ FR_ACT_BLACKHOLE, /* Drop without notification */
+ FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
+ FR_ACT_PROHIBIT, /* Drop with EACCES */
++ FR_ACT_RES9,
++ FR_ACT_RES10,
++ FR_ACT_RES11,
++ FR_ACT_FAILED_POLICY, /* Drop with EPERM */
+ __FR_ACT_MAX,
+ };
+
+diff --git a/include/uapi/linux/icmpv6.h b/include/uapi/linux/icmpv6.h
+index e0133c7..dabfa1a 100644
+--- a/include/uapi/linux/icmpv6.h
++++ b/include/uapi/linux/icmpv6.h
+@@ -115,6 +115,7 @@ struct icmp6hdr {
+ #define ICMPV6_NOT_NEIGHBOUR 2
+ #define ICMPV6_ADDR_UNREACH 3
+ #define ICMPV6_PORT_UNREACH 4
++#define ICMPV6_FAILED_POLICY 5
+
+ /*
+ * Codes for Time Exceeded
+diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
+index 7a2144e..8f643f1 100644
+--- a/include/uapi/linux/rtnetlink.h
++++ b/include/uapi/linux/rtnetlink.h
+@@ -203,6 +203,7 @@ enum {
+ RTN_THROW, /* Not in this table */
+ RTN_NAT, /* Translate this address */
+ RTN_XRESOLVE, /* Use external resolver */
++ RTN_FAILED_POLICY, /* Failed ingress/egress policy */
+ __RTN_MAX
+ };
+
+diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
+index 26aa65d..2f66341 100644
+--- a/net/ipv4/fib_rules.c
++++ b/net/ipv4/fib_rules.c
+@@ -84,6 +84,10 @@ static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
+ err = -EACCES;
+ goto errout;
+
++ case FR_ACT_FAILED_POLICY:
++ err = -EPERM;
++ goto errout;
++
+ case FR_ACT_BLACKHOLE:
+ default:
+ err = -EINVAL;
+diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
+index 8f6cb7a..dbae75d 100644
+--- a/net/ipv4/fib_semantics.c
++++ b/net/ipv4/fib_semantics.c
+@@ -138,6 +138,10 @@ const struct fib_prop fib_props[RTN_MAX + 1] = {
+ .error = -EINVAL,
+ .scope = RT_SCOPE_NOWHERE,
+ },
++ [RTN_FAILED_POLICY] = {
++ .error = -EPERM,
++ .scope = RT_SCOPE_UNIVERSE,
++ },
+ };
+
+ static void rt_fibinfo_free(struct rtable __rcu **rtp)
+diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
+index 49616fe..e2845bd 100644
+--- a/net/ipv4/fib_trie.c
++++ b/net/ipv4/fib_trie.c
+@@ -2343,6 +2343,7 @@ static const char *const rtn_type_names[__RTN_MAX] = {
+ [RTN_THROW] = "THROW",
+ [RTN_NAT] = "NAT",
+ [RTN_XRESOLVE] = "XRESOLVE",
++ [RTN_FAILED_POLICY] = "FAILED_POLICY",
+ };
+
+ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
+diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
+index df97f0a..2bd33cc 100644
+--- a/net/ipv4/ipmr.c
++++ b/net/ipv4/ipmr.c
+@@ -181,6 +181,7 @@ static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp,
+ case FR_ACT_UNREACHABLE:
+ return -ENETUNREACH;
+ case FR_ACT_PROHIBIT:
++ case FR_ACT_FAILED_POLICY:
+ return -EACCES;
+ case FR_ACT_BLACKHOLE:
+ default:
+diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
+index 2e1a432..c4413b2 100644
+--- a/net/ipv6/fib6_rules.c
++++ b/net/ipv6/fib6_rules.c
+@@ -69,6 +69,9 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
+ case FR_ACT_PROHIBIT:
+ rt = net->ipv6.ip6_prohibit_entry;
+ goto discard_pkt;
++ case FR_ACT_FAILED_POLICY:
++ rt = net->ipv6.ip6_failed_policy_entry;
++ goto discard_pkt;
+ }
+
+ table = fib6_get_table(net, rule->table);
+diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
+index 583e8d4..1e524da 100644
+--- a/net/ipv6/ip6mr.c
++++ b/net/ipv6/ip6mr.c
+@@ -166,6 +166,8 @@ static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
+ return -ENETUNREACH;
+ case FR_ACT_PROHIBIT:
+ return -EACCES;
++ case FR_ACT_FAILED_POLICY:
++ return -EPERM;
+ case FR_ACT_BLACKHOLE:
+ default:
+ return -EINVAL;
+diff --git a/net/ipv6/route.c b/net/ipv6/route.c
+index 2b87418..864f5fe 100644
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -245,6 +245,24 @@ static const struct rt6_info ip6_prohibit_entry_template = {
+ .rt6i_ref = ATOMIC_INIT(1),
+ };
+
++static int ip6_pkt_failed_policy(struct sk_buff *skb);
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
++
++static const struct rt6_info ip6_failed_policy_entry_template = {
++ .dst = {
++ .__refcnt = ATOMIC_INIT(1),
++ .__use = 1,
++ .obsolete = DST_OBSOLETE_FORCE_CHK,
++ .error = -EPERM,
++ .input = ip6_pkt_failed_policy,
++ .output = ip6_pkt_failed_policy_out,
++ },
++ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
++ .rt6i_protocol = RTPROT_KERNEL,
++ .rt6i_metric = ~(u32) 0,
++ .rt6i_ref = ATOMIC_INIT(1),
++};
++
+ static const struct rt6_info ip6_blk_hole_entry_template = {
+ .dst = {
+ .__refcnt = ATOMIC_INIT(1),
+@@ -1459,6 +1477,9 @@ int ip6_route_add(struct fib6_config *cfg)
+ case RTN_THROW:
+ rt->dst.error = -EAGAIN;
+ break;
++ case RTN_FAILED_POLICY:
++ rt->dst.error = -EPERM;
++ break;
+ default:
+ rt->dst.error = -ENETUNREACH;
+ break;
+@@ -2035,6 +2056,17 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+ return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+ }
+
++static int ip6_pkt_failed_policy(struct sk_buff *skb)
++{
++ return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_INNOROUTES);
++}
++
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
++{
++ skb->dev = skb_dst(skb)->dev;
++ return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_OUTNOROUTES);
++}
++
+ #endif
+
+ /*
+@@ -2240,7 +2272,8 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
+ if (rtm->rtm_type == RTN_UNREACHABLE ||
+ rtm->rtm_type == RTN_BLACKHOLE ||
+ rtm->rtm_type == RTN_PROHIBIT ||
+- rtm->rtm_type == RTN_THROW)
++ rtm->rtm_type == RTN_THROW ||
++ rtm->rtm_type == RTN_FAILED_POLICY)
+ cfg->fc_flags |= RTF_REJECT;
+
+ if (rtm->rtm_type == RTN_LOCAL)
+@@ -2442,6 +2475,9 @@ static int rt6_fill_node(struct net *net,
+ case -EACCES:
+ rtm->rtm_type = RTN_PROHIBIT;
+ break;
++ case -EPERM:
++ rtm->rtm_type = RTN_FAILED_POLICY;
++ break;
+ case -EAGAIN:
+ rtm->rtm_type = RTN_THROW;
+ break;
+@@ -2692,6 +2728,8 @@ static int ip6_route_dev_notify(struct notifier_block *this,
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+ net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
++ net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
++ net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
+ net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+ net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+ #endif
+@@ -2952,6 +2990,17 @@ static int __net_init ip6_route_net_init(struct net *net)
+ net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+ dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
+ ip6_template_metrics, true);
++
++ net->ipv6.ip6_failed_policy_entry =
++ kmemdup(&ip6_failed_policy_entry_template,
++ sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
++ if (!net->ipv6.ip6_failed_policy_entry)
++ goto out_ip6_blk_hole_entry;
++ net->ipv6.ip6_failed_policy_entry->dst.path =
++ (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
++ net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
++ dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
++ ip6_template_metrics, true);
+ #endif
+
+ net->ipv6.sysctl.flush_delay = 0;
+@@ -2970,6 +3019,8 @@ out:
+ return ret;
+
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
++out_ip6_blk_hole_entry:
++ kfree(net->ipv6.ip6_blk_hole_entry);
+ out_ip6_prohibit_entry:
+ kfree(net->ipv6.ip6_prohibit_entry);
+ out_ip6_null_entry:
+@@ -2987,6 +3038,7 @@ static void __net_exit ip6_route_net_exit(struct net *net)
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ kfree(net->ipv6.ip6_prohibit_entry);
+ kfree(net->ipv6.ip6_blk_hole_entry);
++ kfree(net->ipv6.ip6_failed_policy_entry);
+ #endif
+ dst_entries_destroy(&net->ipv6.ip6_dst_ops);
+ }
+@@ -3083,6 +3135,9 @@ int __init ip6_route_init(void)
+ init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+ init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
++ init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
++ init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
++ in6_dev_get(init_net.loopback_dev);
+ #endif
+ ret = fib6_init();
+ if (ret)
projects / openwrt.git / blobdiff