Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux INET6 implementation |
| 3 | * FIB front-end. |
| 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | /* Changes: |
| 15 | * |
| 16 | * YOSHIFUJI Hideaki @USAGI |
| 17 | * reworked default router selection. |
| 18 | * - respect outgoing interface |
| 19 | * - select from (probably) reachable routers (i.e. |
| 20 | * routers in REACHABLE, STALE, DELAY or PROBE states). |
| 21 | * - always select the same router if it is (probably) |
| 22 | * reachable. otherwise, round-robin the list. |
YOSHIFUJI Hideaki | c0bece9 | 2006-08-23 17:23:25 -0700 | [diff] [blame] | 23 | * Ville Nuorvala |
| 24 | * Fixed routing subtrees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | */ |
| 26 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 27 | #define pr_fmt(fmt) "IPv6: " fmt |
| 28 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 29 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/errno.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 31 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/types.h> |
| 33 | #include <linux/times.h> |
| 34 | #include <linux/socket.h> |
| 35 | #include <linux/sockios.h> |
| 36 | #include <linux/net.h> |
| 37 | #include <linux/route.h> |
| 38 | #include <linux/netdevice.h> |
| 39 | #include <linux/in6.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 40 | #include <linux/mroute6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/if_arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/proc_fs.h> |
| 44 | #include <linux/seq_file.h> |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 45 | #include <linux/nsproxy.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 47 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <net/snmp.h> |
| 49 | #include <net/ipv6.h> |
| 50 | #include <net/ip6_fib.h> |
| 51 | #include <net/ip6_route.h> |
| 52 | #include <net/ndisc.h> |
| 53 | #include <net/addrconf.h> |
| 54 | #include <net/tcp.h> |
| 55 | #include <linux/rtnetlink.h> |
| 56 | #include <net/dst.h> |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 57 | #include <net/dst_metadata.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include <net/xfrm.h> |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 59 | #include <net/netevent.h> |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 60 | #include <net/netlink.h> |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 61 | #include <net/nexthop.h> |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 62 | #include <net/lwtunnel.h> |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 63 | #include <net/ip_tunnels.h> |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 64 | #include <net/l3mdev.h> |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 65 | #include <trace/events/fib6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | #include <asm/uaccess.h> |
| 68 | |
| 69 | #ifdef CONFIG_SYSCTL |
| 70 | #include <linux/sysctl.h> |
| 71 | #endif |
| 72 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 73 | enum rt6_nud_state { |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 74 | RT6_NUD_FAIL_HARD = -3, |
| 75 | RT6_NUD_FAIL_PROBE = -2, |
| 76 | RT6_NUD_FAIL_DO_RR = -1, |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 77 | RT6_NUD_SUCCEED = 1 |
| 78 | }; |
| 79 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 80 | static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie); |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 82 | static unsigned int ip6_default_advmss(const struct dst_entry *dst); |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 83 | static unsigned int ip6_mtu(const struct dst_entry *dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
| 85 | static void ip6_dst_destroy(struct dst_entry *); |
| 86 | static void ip6_dst_ifdown(struct dst_entry *, |
| 87 | struct net_device *dev, int how); |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 88 | static int ip6_dst_gc(struct dst_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | static int ip6_pkt_discard(struct sk_buff *skb); |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 91 | static int ip6_pkt_discard_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 92 | static int ip6_pkt_prohibit(struct sk_buff *skb); |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 93 | static int ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | static void ip6_link_failure(struct sk_buff *skb); |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 95 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 96 | struct sk_buff *skb, u32 mtu); |
| 97 | static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, |
| 98 | struct sk_buff *skb); |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 99 | static void rt6_dst_from_metrics_check(struct rt6_info *rt); |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 100 | static int rt6_score_route(struct rt6_info *rt, int oif, int strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 102 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 103 | static struct rt6_info *rt6_add_route_info(struct net_device *dev, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 104 | const struct in6_addr *prefix, int prefixlen, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 105 | const struct in6_addr *gwaddr, unsigned int pref); |
| 106 | static struct rt6_info *rt6_get_route_info(struct net_device *dev, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 107 | const struct in6_addr *prefix, int prefixlen, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 108 | const struct in6_addr *gwaddr); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 109 | #endif |
| 110 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 111 | struct uncached_list { |
| 112 | spinlock_t lock; |
| 113 | struct list_head head; |
| 114 | }; |
| 115 | |
| 116 | static DEFINE_PER_CPU_ALIGNED(struct uncached_list, rt6_uncached_list); |
| 117 | |
| 118 | static void rt6_uncached_list_add(struct rt6_info *rt) |
| 119 | { |
| 120 | struct uncached_list *ul = raw_cpu_ptr(&rt6_uncached_list); |
| 121 | |
| 122 | rt->dst.flags |= DST_NOCACHE; |
| 123 | rt->rt6i_uncached_list = ul; |
| 124 | |
| 125 | spin_lock_bh(&ul->lock); |
| 126 | list_add_tail(&rt->rt6i_uncached, &ul->head); |
| 127 | spin_unlock_bh(&ul->lock); |
| 128 | } |
| 129 | |
| 130 | static void rt6_uncached_list_del(struct rt6_info *rt) |
| 131 | { |
| 132 | if (!list_empty(&rt->rt6i_uncached)) { |
| 133 | struct uncached_list *ul = rt->rt6i_uncached_list; |
| 134 | |
| 135 | spin_lock_bh(&ul->lock); |
| 136 | list_del(&rt->rt6i_uncached); |
| 137 | spin_unlock_bh(&ul->lock); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev) |
| 142 | { |
| 143 | struct net_device *loopback_dev = net->loopback_dev; |
| 144 | int cpu; |
| 145 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 146 | if (dev == loopback_dev) |
| 147 | return; |
| 148 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 149 | for_each_possible_cpu(cpu) { |
| 150 | struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu); |
| 151 | struct rt6_info *rt; |
| 152 | |
| 153 | spin_lock_bh(&ul->lock); |
| 154 | list_for_each_entry(rt, &ul->head, rt6i_uncached) { |
| 155 | struct inet6_dev *rt_idev = rt->rt6i_idev; |
| 156 | struct net_device *rt_dev = rt->dst.dev; |
| 157 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 158 | if (rt_idev->dev == dev) { |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 159 | rt->rt6i_idev = in6_dev_get(loopback_dev); |
| 160 | in6_dev_put(rt_idev); |
| 161 | } |
| 162 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 163 | if (rt_dev == dev) { |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 164 | rt->dst.dev = loopback_dev; |
| 165 | dev_hold(rt->dst.dev); |
| 166 | dev_put(rt_dev); |
| 167 | } |
| 168 | } |
| 169 | spin_unlock_bh(&ul->lock); |
| 170 | } |
| 171 | } |
| 172 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 173 | static u32 *rt6_pcpu_cow_metrics(struct rt6_info *rt) |
| 174 | { |
| 175 | return dst_metrics_write_ptr(rt->dst.from); |
| 176 | } |
| 177 | |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 178 | static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) |
| 179 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 180 | struct rt6_info *rt = (struct rt6_info *)dst; |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 181 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 182 | if (rt->rt6i_flags & RTF_PCPU) |
| 183 | return rt6_pcpu_cow_metrics(rt); |
| 184 | else if (rt->rt6i_flags & RTF_CACHE) |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 185 | return NULL; |
| 186 | else |
Martin KaFai Lau | 3b47117 | 2015-02-12 16:14:08 -0800 | [diff] [blame] | 187 | return dst_cow_metrics_generic(dst, old); |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 188 | } |
| 189 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 190 | static inline const void *choose_neigh_daddr(struct rt6_info *rt, |
| 191 | struct sk_buff *skb, |
| 192 | const void *daddr) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 193 | { |
| 194 | struct in6_addr *p = &rt->rt6i_gateway; |
| 195 | |
David S. Miller | a7563f3 | 2012-01-26 16:29:16 -0500 | [diff] [blame] | 196 | if (!ipv6_addr_any(p)) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 197 | return (const void *) p; |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 198 | else if (skb) |
| 199 | return &ipv6_hdr(skb)->daddr; |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 200 | return daddr; |
| 201 | } |
| 202 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 203 | static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, |
| 204 | struct sk_buff *skb, |
| 205 | const void *daddr) |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 206 | { |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 207 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 208 | struct neighbour *n; |
| 209 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 210 | daddr = choose_neigh_daddr(rt, skb, daddr); |
YOSHIFUJI Hideaki / 吉藤英明 | 8e022ee | 2013-01-17 12:53:09 +0000 | [diff] [blame] | 211 | n = __ipv6_neigh_lookup(dst->dev, daddr); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 212 | if (n) |
| 213 | return n; |
| 214 | return neigh_create(&nd_tbl, daddr, dst->dev); |
| 215 | } |
| 216 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 217 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | .family = AF_INET6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | .gc = ip6_dst_gc, |
| 220 | .gc_thresh = 1024, |
| 221 | .check = ip6_dst_check, |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 222 | .default_advmss = ip6_default_advmss, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 223 | .mtu = ip6_mtu, |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 224 | .cow_metrics = ipv6_cow_metrics, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | .destroy = ip6_dst_destroy, |
| 226 | .ifdown = ip6_dst_ifdown, |
| 227 | .negative_advice = ip6_negative_advice, |
| 228 | .link_failure = ip6_link_failure, |
| 229 | .update_pmtu = ip6_rt_update_pmtu, |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 230 | .redirect = rt6_do_redirect, |
Eric W. Biederman | 9f8955c | 2015-10-07 16:48:39 -0500 | [diff] [blame] | 231 | .local_out = __ip6_local_out, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 232 | .neigh_lookup = ip6_neigh_lookup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | }; |
| 234 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 235 | static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst) |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 236 | { |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 237 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 238 | |
| 239 | return mtu ? : dst->dev->mtu; |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 240 | } |
| 241 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 242 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 243 | struct sk_buff *skb, u32 mtu) |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 244 | { |
| 245 | } |
| 246 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 247 | static void ip6_rt_blackhole_redirect(struct dst_entry *dst, struct sock *sk, |
| 248 | struct sk_buff *skb) |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 249 | { |
| 250 | } |
| 251 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 252 | static struct dst_ops ip6_dst_blackhole_ops = { |
| 253 | .family = AF_INET6, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 254 | .destroy = ip6_dst_destroy, |
| 255 | .check = ip6_dst_check, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 256 | .mtu = ip6_blackhole_mtu, |
Eric Dumazet | 214f45c | 2011-02-18 11:39:01 -0800 | [diff] [blame] | 257 | .default_advmss = ip6_default_advmss, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 258 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 259 | .redirect = ip6_rt_blackhole_redirect, |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 260 | .cow_metrics = dst_cow_metrics_generic, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 261 | .neigh_lookup = ip6_neigh_lookup, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 262 | }; |
| 263 | |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 264 | static const u32 ip6_template_metrics[RTAX_MAX] = { |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 265 | [RTAX_HOPLIMIT - 1] = 0, |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 266 | }; |
| 267 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 268 | static const struct rt6_info ip6_null_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 269 | .dst = { |
| 270 | .__refcnt = ATOMIC_INIT(1), |
| 271 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 272 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 273 | .error = -ENETUNREACH, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 274 | .input = ip6_pkt_discard, |
| 275 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | }, |
| 277 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 278 | .rt6i_protocol = RTPROT_KERNEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | .rt6i_metric = ~(u32) 0, |
| 280 | .rt6i_ref = ATOMIC_INIT(1), |
| 281 | }; |
| 282 | |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 283 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 284 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 285 | static const struct rt6_info ip6_prohibit_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 286 | .dst = { |
| 287 | .__refcnt = ATOMIC_INIT(1), |
| 288 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 289 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 290 | .error = -EACCES, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 291 | .input = ip6_pkt_prohibit, |
| 292 | .output = ip6_pkt_prohibit_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 293 | }, |
| 294 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 295 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 296 | .rt6i_metric = ~(u32) 0, |
| 297 | .rt6i_ref = ATOMIC_INIT(1), |
| 298 | }; |
| 299 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 300 | static const struct rt6_info ip6_blk_hole_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 301 | .dst = { |
| 302 | .__refcnt = ATOMIC_INIT(1), |
| 303 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 304 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 305 | .error = -EINVAL, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 306 | .input = dst_discard, |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 307 | .output = dst_discard_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 308 | }, |
| 309 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 310 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 311 | .rt6i_metric = ~(u32) 0, |
| 312 | .rt6i_ref = ATOMIC_INIT(1), |
| 313 | }; |
| 314 | |
| 315 | #endif |
| 316 | |
Martin KaFai Lau | ebfa45f | 2015-10-15 16:39:57 -0700 | [diff] [blame] | 317 | static void rt6_info_init(struct rt6_info *rt) |
| 318 | { |
| 319 | struct dst_entry *dst = &rt->dst; |
| 320 | |
| 321 | memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst)); |
| 322 | INIT_LIST_HEAD(&rt->rt6i_siblings); |
| 323 | INIT_LIST_HEAD(&rt->rt6i_uncached); |
| 324 | } |
| 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | /* allocate dst with ip6_dst_ops */ |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 327 | static struct rt6_info *__ip6_dst_alloc(struct net *net, |
| 328 | struct net_device *dev, |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 329 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 331 | struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev, |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 332 | 0, DST_OBSOLETE_FORCE_CHK, flags); |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 333 | |
Martin KaFai Lau | ebfa45f | 2015-10-15 16:39:57 -0700 | [diff] [blame] | 334 | if (rt) |
| 335 | rt6_info_init(rt); |
Steffen Klassert | 8104891 | 2012-07-05 23:37:09 +0000 | [diff] [blame] | 336 | |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 337 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
David Ahern | 9ab179d | 2016-04-07 11:10:06 -0700 | [diff] [blame] | 340 | struct rt6_info *ip6_dst_alloc(struct net *net, |
| 341 | struct net_device *dev, |
| 342 | int flags) |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 343 | { |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 344 | struct rt6_info *rt = __ip6_dst_alloc(net, dev, flags); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 345 | |
| 346 | if (rt) { |
| 347 | rt->rt6i_pcpu = alloc_percpu_gfp(struct rt6_info *, GFP_ATOMIC); |
| 348 | if (rt->rt6i_pcpu) { |
| 349 | int cpu; |
| 350 | |
| 351 | for_each_possible_cpu(cpu) { |
| 352 | struct rt6_info **p; |
| 353 | |
| 354 | p = per_cpu_ptr(rt->rt6i_pcpu, cpu); |
| 355 | /* no one shares rt */ |
| 356 | *p = NULL; |
| 357 | } |
| 358 | } else { |
| 359 | dst_destroy((struct dst_entry *)rt); |
| 360 | return NULL; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | return rt; |
| 365 | } |
David Ahern | 9ab179d | 2016-04-07 11:10:06 -0700 | [diff] [blame] | 366 | EXPORT_SYMBOL(ip6_dst_alloc); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | static void ip6_dst_destroy(struct dst_entry *dst) |
| 369 | { |
| 370 | struct rt6_info *rt = (struct rt6_info *)dst; |
YOSHIFUJI Hideaki / 吉藤英明 | ecd9883 | 2013-02-20 00:29:08 +0000 | [diff] [blame] | 371 | struct dst_entry *from = dst->from; |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 372 | struct inet6_dev *idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 374 | dst_destroy_metrics_generic(dst); |
Markus Elfring | 8777531 | 2015-07-02 16:30:24 +0200 | [diff] [blame] | 375 | free_percpu(rt->rt6i_pcpu); |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 376 | rt6_uncached_list_del(rt); |
| 377 | |
| 378 | idev = rt->rt6i_idev; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 379 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | rt->rt6i_idev = NULL; |
| 381 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 382 | } |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 383 | |
YOSHIFUJI Hideaki / 吉藤英明 | ecd9883 | 2013-02-20 00:29:08 +0000 | [diff] [blame] | 384 | dst->from = NULL; |
| 385 | dst_release(from); |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 386 | } |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 389 | int how) |
| 390 | { |
| 391 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 392 | struct inet6_dev *idev = rt->rt6i_idev; |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 393 | struct net_device *loopback_dev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 394 | dev_net(dev)->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
David S. Miller | 97cac08 | 2012-07-02 22:43:47 -0700 | [diff] [blame] | 396 | if (dev != loopback_dev) { |
| 397 | if (idev && idev->dev == dev) { |
| 398 | struct inet6_dev *loopback_idev = |
| 399 | in6_dev_get(loopback_dev); |
| 400 | if (loopback_idev) { |
| 401 | rt->rt6i_idev = loopback_idev; |
| 402 | in6_dev_put(idev); |
| 403 | } |
| 404 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | } |
| 407 | |
Martin KaFai Lau | 5973fb1 | 2015-11-11 11:51:07 -0800 | [diff] [blame] | 408 | static bool __rt6_check_expired(const struct rt6_info *rt) |
| 409 | { |
| 410 | if (rt->rt6i_flags & RTF_EXPIRES) |
| 411 | return time_after(jiffies, rt->dst.expires); |
| 412 | else |
| 413 | return false; |
| 414 | } |
| 415 | |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 416 | static bool rt6_check_expired(const struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 418 | if (rt->rt6i_flags & RTF_EXPIRES) { |
| 419 | if (time_after(jiffies, rt->dst.expires)) |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 420 | return true; |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 421 | } else if (rt->dst.from) { |
Li RongQing | 3fd91fb | 2012-09-13 19:54:57 +0000 | [diff] [blame] | 422 | return rt6_check_expired((struct rt6_info *) rt->dst.from); |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 423 | } |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 424 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 427 | /* Multipath route selection: |
| 428 | * Hash based function using packet header and flowlabel. |
| 429 | * Adapted from fib_info_hashfn() |
| 430 | */ |
| 431 | static int rt6_info_hash_nhsfn(unsigned int candidate_count, |
| 432 | const struct flowi6 *fl6) |
| 433 | { |
Tom Herbert | 644d0e6 | 2015-09-23 14:13:35 -0700 | [diff] [blame] | 434 | return get_hash_from_flowi6(fl6) % candidate_count; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | static struct rt6_info *rt6_multipath_select(struct rt6_info *match, |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 438 | struct flowi6 *fl6, int oif, |
| 439 | int strict) |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 440 | { |
| 441 | struct rt6_info *sibling, *next_sibling; |
| 442 | int route_choosen; |
| 443 | |
| 444 | route_choosen = rt6_info_hash_nhsfn(match->rt6i_nsiblings + 1, fl6); |
| 445 | /* Don't change the route, if route_choosen == 0 |
| 446 | * (siblings does not include ourself) |
| 447 | */ |
| 448 | if (route_choosen) |
| 449 | list_for_each_entry_safe(sibling, next_sibling, |
| 450 | &match->rt6i_siblings, rt6i_siblings) { |
| 451 | route_choosen--; |
| 452 | if (route_choosen == 0) { |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 453 | if (rt6_score_route(sibling, oif, strict) < 0) |
| 454 | break; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 455 | match = sibling; |
| 456 | break; |
| 457 | } |
| 458 | } |
| 459 | return match; |
| 460 | } |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 463 | * Route lookup. Any table->tb6_lock is implied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | */ |
| 465 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 466 | static inline struct rt6_info *rt6_device_match(struct net *net, |
| 467 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 468 | const struct in6_addr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 470 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
| 472 | struct rt6_info *local = NULL; |
| 473 | struct rt6_info *sprt; |
| 474 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 475 | if (!oif && ipv6_addr_any(saddr)) |
| 476 | goto out; |
| 477 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 478 | for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 479 | struct net_device *dev = sprt->dst.dev; |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 480 | |
| 481 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (dev->ifindex == oif) |
| 483 | return sprt; |
| 484 | if (dev->flags & IFF_LOOPBACK) { |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 485 | if (!sprt->rt6i_idev || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | sprt->rt6i_idev->dev->ifindex != oif) { |
David Ahern | 17fb0b2 | 2015-09-25 15:22:54 -0600 | [diff] [blame] | 487 | if (flags & RT6_LOOKUP_F_IFACE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | continue; |
David Ahern | 17fb0b2 | 2015-09-25 15:22:54 -0600 | [diff] [blame] | 489 | if (local && |
| 490 | local->rt6i_idev->dev->ifindex == oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | continue; |
| 492 | } |
| 493 | local = sprt; |
| 494 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 495 | } else { |
| 496 | if (ipv6_chk_addr(net, saddr, dev, |
| 497 | flags & RT6_LOOKUP_F_IFACE)) |
| 498 | return sprt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 502 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (local) |
| 504 | return local; |
| 505 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 506 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 507 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 509 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | return rt; |
| 511 | } |
| 512 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 513 | #ifdef CONFIG_IPV6_ROUTER_PREF |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 514 | struct __rt6_probe_work { |
| 515 | struct work_struct work; |
| 516 | struct in6_addr target; |
| 517 | struct net_device *dev; |
| 518 | }; |
| 519 | |
| 520 | static void rt6_probe_deferred(struct work_struct *w) |
| 521 | { |
| 522 | struct in6_addr mcaddr; |
| 523 | struct __rt6_probe_work *work = |
| 524 | container_of(w, struct __rt6_probe_work, work); |
| 525 | |
| 526 | addrconf_addr_solict_mult(&work->target, &mcaddr); |
Nicolas Dichtel | 304d888 | 2015-11-27 18:17:05 +0100 | [diff] [blame] | 527 | ndisc_send_ns(work->dev, &work->target, &mcaddr, NULL); |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 528 | dev_put(work->dev); |
Michael Büsch | 662f553 | 2015-02-08 10:14:07 +0100 | [diff] [blame] | 529 | kfree(work); |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 530 | } |
| 531 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 532 | static void rt6_probe(struct rt6_info *rt) |
| 533 | { |
Martin KaFai Lau | 990edb4 | 2015-07-24 09:57:42 -0700 | [diff] [blame] | 534 | struct __rt6_probe_work *work; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 535 | struct neighbour *neigh; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 536 | /* |
| 537 | * Okay, this does not seem to be appropriate |
| 538 | * for now, however, we need to check if it |
| 539 | * is really so; aka Router Reachability Probing. |
| 540 | * |
| 541 | * Router Reachability Probe MUST be rate-limited |
| 542 | * to no more than one per minute. |
| 543 | */ |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 544 | if (!rt || !(rt->rt6i_flags & RTF_GATEWAY)) |
Amerigo Wang | fdd6681 | 2012-09-10 02:48:44 +0000 | [diff] [blame] | 545 | return; |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 546 | rcu_read_lock_bh(); |
| 547 | neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway); |
| 548 | if (neigh) { |
Martin KaFai Lau | 8d6c31b | 2015-07-24 09:57:43 -0700 | [diff] [blame] | 549 | if (neigh->nud_state & NUD_VALID) |
| 550 | goto out; |
| 551 | |
Martin KaFai Lau | 990edb4 | 2015-07-24 09:57:42 -0700 | [diff] [blame] | 552 | work = NULL; |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 553 | write_lock(&neigh->lock); |
Martin KaFai Lau | 990edb4 | 2015-07-24 09:57:42 -0700 | [diff] [blame] | 554 | if (!(neigh->nud_state & NUD_VALID) && |
| 555 | time_after(jiffies, |
| 556 | neigh->updated + |
| 557 | rt->rt6i_idev->cnf.rtr_probe_interval)) { |
| 558 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
| 559 | if (work) |
| 560 | __neigh_set_probe_once(neigh); |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 561 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 562 | write_unlock(&neigh->lock); |
Martin KaFai Lau | 990edb4 | 2015-07-24 09:57:42 -0700 | [diff] [blame] | 563 | } else { |
| 564 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 565 | } |
Martin KaFai Lau | 990edb4 | 2015-07-24 09:57:42 -0700 | [diff] [blame] | 566 | |
| 567 | if (work) { |
| 568 | INIT_WORK(&work->work, rt6_probe_deferred); |
| 569 | work->target = rt->rt6i_gateway; |
| 570 | dev_hold(rt->dst.dev); |
| 571 | work->dev = rt->dst.dev; |
| 572 | schedule_work(&work->work); |
| 573 | } |
| 574 | |
Martin KaFai Lau | 8d6c31b | 2015-07-24 09:57:43 -0700 | [diff] [blame] | 575 | out: |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 576 | rcu_read_unlock_bh(); |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 577 | } |
| 578 | #else |
| 579 | static inline void rt6_probe(struct rt6_info *rt) |
| 580 | { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 581 | } |
| 582 | #endif |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 585 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 587 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 589 | struct net_device *dev = rt->dst.dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 590 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 591 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 592 | if ((dev->flags & IFF_LOOPBACK) && |
| 593 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 594 | return 1; |
| 595 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | } |
| 597 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 598 | static inline enum rt6_nud_state rt6_check_neigh(struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 600 | struct neighbour *neigh; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 601 | enum rt6_nud_state ret = RT6_NUD_FAIL_HARD; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 602 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 603 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 604 | !(rt->rt6i_flags & RTF_GATEWAY)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 605 | return RT6_NUD_SUCCEED; |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 606 | |
| 607 | rcu_read_lock_bh(); |
| 608 | neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway); |
| 609 | if (neigh) { |
| 610 | read_lock(&neigh->lock); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 611 | if (neigh->nud_state & NUD_VALID) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 612 | ret = RT6_NUD_SUCCEED; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 613 | #ifdef CONFIG_IPV6_ROUTER_PREF |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 614 | else if (!(neigh->nud_state & NUD_FAILED)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 615 | ret = RT6_NUD_SUCCEED; |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 616 | else |
| 617 | ret = RT6_NUD_FAIL_PROBE; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 618 | #endif |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 619 | read_unlock(&neigh->lock); |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 620 | } else { |
| 621 | ret = IS_ENABLED(CONFIG_IPV6_ROUTER_PREF) ? |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 622 | RT6_NUD_SUCCEED : RT6_NUD_FAIL_DO_RR; |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 623 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 624 | rcu_read_unlock_bh(); |
| 625 | |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 626 | return ret; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 627 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 629 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 630 | int strict) |
| 631 | { |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 632 | int m; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 633 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 634 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 635 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 636 | return RT6_NUD_FAIL_HARD; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 637 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 638 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 639 | #endif |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 640 | if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 641 | int n = rt6_check_neigh(rt); |
| 642 | if (n < 0) |
| 643 | return n; |
| 644 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 645 | return m; |
| 646 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 648 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 649 | int *mpri, struct rt6_info *match, |
| 650 | bool *do_rr) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 651 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 652 | int m; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 653 | bool match_do_rr = false; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 654 | struct inet6_dev *idev = rt->rt6i_idev; |
| 655 | struct net_device *dev = rt->dst.dev; |
| 656 | |
| 657 | if (dev && !netif_carrier_ok(dev) && |
| 658 | idev->cnf.ignore_routes_with_linkdown) |
| 659 | goto out; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 660 | |
| 661 | if (rt6_check_expired(rt)) |
| 662 | goto out; |
| 663 | |
| 664 | m = rt6_score_route(rt, oif, strict); |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 665 | if (m == RT6_NUD_FAIL_DO_RR) { |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 666 | match_do_rr = true; |
| 667 | m = 0; /* lowest valid score */ |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 668 | } else if (m == RT6_NUD_FAIL_HARD) { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 669 | goto out; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 672 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 673 | rt6_probe(rt); |
| 674 | |
Jiri Benc | 7e98056 | 2013-12-11 13:48:20 +0100 | [diff] [blame] | 675 | /* note that m can be RT6_NUD_FAIL_PROBE at this point */ |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 676 | if (m > *mpri) { |
| 677 | *do_rr = match_do_rr; |
| 678 | *mpri = m; |
| 679 | match = rt; |
| 680 | } |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 681 | out: |
| 682 | return match; |
| 683 | } |
| 684 | |
| 685 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 686 | struct rt6_info *rr_head, |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 687 | u32 metric, int oif, int strict, |
| 688 | bool *do_rr) |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 689 | { |
Steffen Klassert | 9fbdcfa | 2015-04-28 13:03:04 -0700 | [diff] [blame] | 690 | struct rt6_info *rt, *match, *cont; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 691 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 693 | match = NULL; |
Steffen Klassert | 9fbdcfa | 2015-04-28 13:03:04 -0700 | [diff] [blame] | 694 | cont = NULL; |
| 695 | for (rt = rr_head; rt; rt = rt->dst.rt6_next) { |
| 696 | if (rt->rt6i_metric != metric) { |
| 697 | cont = rt; |
| 698 | break; |
| 699 | } |
| 700 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 701 | match = find_match(rt, oif, strict, &mpri, match, do_rr); |
Steffen Klassert | 9fbdcfa | 2015-04-28 13:03:04 -0700 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | for (rt = fn->leaf; rt && rt != rr_head; rt = rt->dst.rt6_next) { |
| 705 | if (rt->rt6i_metric != metric) { |
| 706 | cont = rt; |
| 707 | break; |
| 708 | } |
| 709 | |
| 710 | match = find_match(rt, oif, strict, &mpri, match, do_rr); |
| 711 | } |
| 712 | |
| 713 | if (match || !cont) |
| 714 | return match; |
| 715 | |
| 716 | for (rt = cont; rt; rt = rt->dst.rt6_next) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 717 | match = find_match(rt, oif, strict, &mpri, match, do_rr); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 718 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 719 | return match; |
| 720 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 721 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 722 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 723 | { |
| 724 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 725 | struct net *net; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 726 | bool do_rr = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 728 | rt0 = fn->rr_ptr; |
| 729 | if (!rt0) |
| 730 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 732 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict, |
| 733 | &do_rr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 735 | if (do_rr) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 736 | struct rt6_info *next = rt0->dst.rt6_next; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 737 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 738 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 739 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 740 | next = fn->leaf; |
| 741 | |
| 742 | if (next != rt0) |
| 743 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } |
| 745 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 746 | net = dev_net(rt0->dst.dev); |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 747 | return match ? match : net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | } |
| 749 | |
Martin KaFai Lau | 8b9df26 | 2015-05-22 20:55:59 -0700 | [diff] [blame] | 750 | static bool rt6_is_gw_or_nonexthop(const struct rt6_info *rt) |
| 751 | { |
| 752 | return (rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY)); |
| 753 | } |
| 754 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 755 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 756 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 757 | const struct in6_addr *gwaddr) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 758 | { |
| 759 | struct route_info *rinfo = (struct route_info *) opt; |
| 760 | struct in6_addr prefix_buf, *prefix; |
| 761 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 762 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 763 | struct rt6_info *rt; |
| 764 | |
| 765 | if (len < sizeof(struct route_info)) { |
| 766 | return -EINVAL; |
| 767 | } |
| 768 | |
| 769 | /* Sanity check for prefix_len and length */ |
| 770 | if (rinfo->length > 3) { |
| 771 | return -EINVAL; |
| 772 | } else if (rinfo->prefix_len > 128) { |
| 773 | return -EINVAL; |
| 774 | } else if (rinfo->prefix_len > 64) { |
| 775 | if (rinfo->length < 2) { |
| 776 | return -EINVAL; |
| 777 | } |
| 778 | } else if (rinfo->prefix_len > 0) { |
| 779 | if (rinfo->length < 1) { |
| 780 | return -EINVAL; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | pref = rinfo->route_pref; |
| 785 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
Jens Rosenboom | 3933fc9 | 2009-09-10 06:25:11 +0000 | [diff] [blame] | 786 | return -EINVAL; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 787 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 788 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 789 | |
| 790 | if (rinfo->length == 3) |
| 791 | prefix = (struct in6_addr *)rinfo->prefix; |
| 792 | else { |
| 793 | /* this function is safe */ |
| 794 | ipv6_addr_prefix(&prefix_buf, |
| 795 | (struct in6_addr *)rinfo->prefix, |
| 796 | rinfo->prefix_len); |
| 797 | prefix = &prefix_buf; |
| 798 | } |
| 799 | |
Duan Jiong | f104a56 | 2013-11-08 09:56:53 +0800 | [diff] [blame] | 800 | if (rinfo->prefix_len == 0) |
| 801 | rt = rt6_get_dflt_router(gwaddr, dev); |
| 802 | else |
Amit Pundir | 4cab8a3 | 2015-03-25 04:29:14 +0530 | [diff] [blame] | 803 | rt = rt6_get_route_info(dev, prefix, rinfo->prefix_len, gwaddr); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 804 | |
| 805 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 806 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 807 | rt = NULL; |
| 808 | } |
| 809 | |
| 810 | if (!rt && lifetime) |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 811 | rt = rt6_add_route_info(dev, prefix, rinfo->prefix_len, gwaddr, pref); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 812 | else if (rt) |
| 813 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 814 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 815 | |
| 816 | if (rt) { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 817 | if (!addrconf_finite_timeout(lifetime)) |
| 818 | rt6_clean_expires(rt); |
| 819 | else |
| 820 | rt6_set_expires(rt, jiffies + HZ * lifetime); |
| 821 | |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 822 | ip6_rt_put(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 823 | } |
| 824 | return 0; |
| 825 | } |
| 826 | #endif |
| 827 | |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 828 | static struct fib6_node* fib6_backtrack(struct fib6_node *fn, |
| 829 | struct in6_addr *saddr) |
| 830 | { |
| 831 | struct fib6_node *pn; |
| 832 | while (1) { |
| 833 | if (fn->fn_flags & RTN_TL_ROOT) |
| 834 | return NULL; |
| 835 | pn = fn->parent; |
| 836 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) |
| 837 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); |
| 838 | else |
| 839 | fn = pn; |
| 840 | if (fn->fn_flags & RTN_RTINFO) |
| 841 | return fn; |
| 842 | } |
| 843 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 844 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 845 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 846 | struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 847 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
| 849 | struct fib6_node *fn; |
| 850 | struct rt6_info *rt; |
| 851 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 852 | read_lock_bh(&table->tb6_lock); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 853 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 854 | restart: |
| 855 | rt = fn->leaf; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 856 | rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 857 | if (rt->rt6i_nsiblings && fl6->flowi6_oif == 0) |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 858 | rt = rt6_multipath_select(rt, fl6, fl6->flowi6_oif, flags); |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 859 | if (rt == net->ipv6.ip6_null_entry) { |
| 860 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 861 | if (fn) |
| 862 | goto restart; |
| 863 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 864 | dst_use(&rt->dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 865 | read_unlock_bh(&table->tb6_lock); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 866 | |
| 867 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
| 868 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 869 | return rt; |
| 870 | |
| 871 | } |
| 872 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 873 | struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
Florian Westphal | ea6e574 | 2011-09-05 16:05:44 +0200 | [diff] [blame] | 874 | int flags) |
| 875 | { |
| 876 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup); |
| 877 | } |
| 878 | EXPORT_SYMBOL_GPL(ip6_route_lookup); |
| 879 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 880 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 881 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 882 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 883 | struct flowi6 fl6 = { |
| 884 | .flowi6_oif = oif, |
| 885 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 886 | }; |
| 887 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 888 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 889 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 890 | if (saddr) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 891 | memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 892 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 893 | } |
| 894 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 895 | dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 896 | if (dst->error == 0) |
| 897 | return (struct rt6_info *) dst; |
| 898 | |
| 899 | dst_release(dst); |
| 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | return NULL; |
| 902 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 903 | EXPORT_SYMBOL(rt6_lookup); |
| 904 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 905 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | It takes new route entry, the addition fails by any reason the |
| 907 | route is freed. In any case, if caller does not hold it, it may |
| 908 | be destroyed. |
| 909 | */ |
| 910 | |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 911 | static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info, |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 912 | struct mx6_config *mxc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | { |
| 914 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 915 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 917 | table = rt->rt6i_table; |
| 918 | write_lock_bh(&table->tb6_lock); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 919 | err = fib6_add(&table->tb6_root, rt, info, mxc); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 920 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | return err; |
| 923 | } |
| 924 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 925 | int ip6_ins_rt(struct rt6_info *rt) |
| 926 | { |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 927 | struct nl_info info = { .nl_net = dev_net(rt->dst.dev), }; |
| 928 | struct mx6_config mxc = { .mx = NULL, }; |
| 929 | |
| 930 | return __ip6_ins_rt(rt, &info, &mxc); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 931 | } |
| 932 | |
Martin KaFai Lau | 8b9df26 | 2015-05-22 20:55:59 -0700 | [diff] [blame] | 933 | static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort, |
| 934 | const struct in6_addr *daddr, |
| 935 | const struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | struct rt6_info *rt; |
| 938 | |
| 939 | /* |
| 940 | * Clone the route. |
| 941 | */ |
| 942 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 943 | if (ort->rt6i_flags & (RTF_CACHE | RTF_PCPU)) |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 944 | ort = (struct rt6_info *)ort->dst.from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 946 | rt = __ip6_dst_alloc(dev_net(ort->dst.dev), ort->dst.dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 948 | if (!rt) |
| 949 | return NULL; |
| 950 | |
| 951 | ip6_rt_copy_init(rt, ort); |
| 952 | rt->rt6i_flags |= RTF_CACHE; |
| 953 | rt->rt6i_metric = 0; |
| 954 | rt->dst.flags |= DST_HOST; |
| 955 | rt->rt6i_dst.addr = *daddr; |
| 956 | rt->rt6i_dst.plen = 128; |
| 957 | |
| 958 | if (!rt6_is_gw_or_nonexthop(ort)) { |
| 959 | if (ort->rt6i_dst.plen != 128 && |
| 960 | ipv6_addr_equal(&ort->rt6i_dst.addr, daddr)) |
| 961 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | #ifdef CONFIG_IPV6_SUBTREES |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 963 | if (rt->rt6i_src.plen && saddr) { |
| 964 | rt->rt6i_src.addr = *saddr; |
| 965 | rt->rt6i_src.plen = 128; |
Martin KaFai Lau | 8b9df26 | 2015-05-22 20:55:59 -0700 | [diff] [blame] | 966 | } |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 967 | #endif |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 970 | return rt; |
| 971 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 973 | static struct rt6_info *ip6_rt_pcpu_alloc(struct rt6_info *rt) |
| 974 | { |
| 975 | struct rt6_info *pcpu_rt; |
| 976 | |
| 977 | pcpu_rt = __ip6_dst_alloc(dev_net(rt->dst.dev), |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 978 | rt->dst.dev, rt->dst.flags); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 979 | |
| 980 | if (!pcpu_rt) |
| 981 | return NULL; |
| 982 | ip6_rt_copy_init(pcpu_rt, rt); |
| 983 | pcpu_rt->rt6i_protocol = rt->rt6i_protocol; |
| 984 | pcpu_rt->rt6i_flags |= RTF_PCPU; |
| 985 | return pcpu_rt; |
| 986 | } |
| 987 | |
| 988 | /* It should be called with read_lock_bh(&tb6_lock) acquired */ |
| 989 | static struct rt6_info *rt6_get_pcpu_route(struct rt6_info *rt) |
| 990 | { |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 991 | struct rt6_info *pcpu_rt, **p; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 992 | |
| 993 | p = this_cpu_ptr(rt->rt6i_pcpu); |
| 994 | pcpu_rt = *p; |
| 995 | |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 996 | if (pcpu_rt) { |
| 997 | dst_hold(&pcpu_rt->dst); |
| 998 | rt6_dst_from_metrics_check(pcpu_rt); |
| 999 | } |
| 1000 | return pcpu_rt; |
| 1001 | } |
| 1002 | |
| 1003 | static struct rt6_info *rt6_make_pcpu_route(struct rt6_info *rt) |
| 1004 | { |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1005 | struct fib6_table *table = rt->rt6i_table; |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 1006 | struct rt6_info *pcpu_rt, *prev, **p; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1007 | |
| 1008 | pcpu_rt = ip6_rt_pcpu_alloc(rt); |
| 1009 | if (!pcpu_rt) { |
| 1010 | struct net *net = dev_net(rt->dst.dev); |
| 1011 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1012 | dst_hold(&net->ipv6.ip6_null_entry->dst); |
| 1013 | return net->ipv6.ip6_null_entry; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1014 | } |
| 1015 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1016 | read_lock_bh(&table->tb6_lock); |
| 1017 | if (rt->rt6i_pcpu) { |
| 1018 | p = this_cpu_ptr(rt->rt6i_pcpu); |
| 1019 | prev = cmpxchg(p, NULL, pcpu_rt); |
| 1020 | if (prev) { |
| 1021 | /* If someone did it before us, return prev instead */ |
| 1022 | dst_destroy(&pcpu_rt->dst); |
| 1023 | pcpu_rt = prev; |
| 1024 | } |
| 1025 | } else { |
| 1026 | /* rt has been removed from the fib6 tree |
| 1027 | * before we have a chance to acquire the read_lock. |
| 1028 | * In this case, don't brother to create a pcpu rt |
| 1029 | * since rt is going away anyway. The next |
| 1030 | * dst_check() will trigger a re-lookup. |
| 1031 | */ |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1032 | dst_destroy(&pcpu_rt->dst); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1033 | pcpu_rt = rt; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1034 | } |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1035 | dst_hold(&pcpu_rt->dst); |
| 1036 | rt6_dst_from_metrics_check(pcpu_rt); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1037 | read_unlock_bh(&table->tb6_lock); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1038 | return pcpu_rt; |
| 1039 | } |
| 1040 | |
David Ahern | 9ff7438 | 2016-06-13 13:44:19 -0700 | [diff] [blame] | 1041 | struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, |
| 1042 | int oif, struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | { |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1044 | struct fib6_node *fn, *saved_fn; |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1045 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1046 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 1048 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1049 | if (net->ipv6.devconf_all->forwarding == 0) |
| 1050 | strict |= RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1052 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1054 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1055 | saved_fn = fn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1057 | if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF) |
| 1058 | oif = 0; |
| 1059 | |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1060 | redo_rt6_select: |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1061 | rt = rt6_select(fn, oif, strict); |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 1062 | if (rt->rt6i_nsiblings) |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1063 | rt = rt6_multipath_select(rt, fl6, oif, strict); |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1064 | if (rt == net->ipv6.ip6_null_entry) { |
| 1065 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 1066 | if (fn) |
| 1067 | goto redo_rt6_select; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1068 | else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 1069 | /* also consider unreachable route */ |
| 1070 | strict &= ~RT6_LOOKUP_F_REACHABLE; |
| 1071 | fn = saved_fn; |
| 1072 | goto redo_rt6_select; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1073 | } |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 1076 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1077 | if (rt == net->ipv6.ip6_null_entry || (rt->rt6i_flags & RTF_CACHE)) { |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1078 | dst_use(&rt->dst, jiffies); |
| 1079 | read_unlock_bh(&table->tb6_lock); |
| 1080 | |
| 1081 | rt6_dst_from_metrics_check(rt); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1082 | |
| 1083 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1084 | return rt; |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1085 | } else if (unlikely((fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH) && |
| 1086 | !(rt->rt6i_flags & RTF_GATEWAY))) { |
| 1087 | /* Create a RTF_CACHE clone which will not be |
| 1088 | * owned by the fib6 tree. It is for the special case where |
| 1089 | * the daddr in the skb during the neighbor look-up is different |
| 1090 | * from the fl6->daddr used to look-up route here. |
| 1091 | */ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1092 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1093 | struct rt6_info *uncached_rt; |
| 1094 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1095 | dst_use(&rt->dst, jiffies); |
| 1096 | read_unlock_bh(&table->tb6_lock); |
| 1097 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1098 | uncached_rt = ip6_rt_cache_alloc(rt, &fl6->daddr, NULL); |
| 1099 | dst_release(&rt->dst); |
| 1100 | |
| 1101 | if (uncached_rt) |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 1102 | rt6_uncached_list_add(uncached_rt); |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1103 | else |
| 1104 | uncached_rt = net->ipv6.ip6_null_entry; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1105 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1106 | dst_hold(&uncached_rt->dst); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1107 | |
| 1108 | trace_fib6_table_lookup(net, uncached_rt, table->tb6_id, fl6); |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1109 | return uncached_rt; |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1110 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1111 | } else { |
| 1112 | /* Get a percpu copy */ |
| 1113 | |
| 1114 | struct rt6_info *pcpu_rt; |
| 1115 | |
| 1116 | rt->dst.lastuse = jiffies; |
| 1117 | rt->dst.__use++; |
| 1118 | pcpu_rt = rt6_get_pcpu_route(rt); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1119 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1120 | if (pcpu_rt) { |
| 1121 | read_unlock_bh(&table->tb6_lock); |
| 1122 | } else { |
| 1123 | /* We have to do the read_unlock first |
| 1124 | * because rt6_make_pcpu_route() may trigger |
| 1125 | * ip6_dst_gc() which will take the write_lock. |
| 1126 | */ |
| 1127 | dst_hold(&rt->dst); |
| 1128 | read_unlock_bh(&table->tb6_lock); |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 1129 | pcpu_rt = rt6_make_pcpu_route(rt); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1130 | dst_release(&rt->dst); |
| 1131 | } |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1132 | |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1133 | trace_fib6_table_lookup(net, pcpu_rt, table->tb6_id, fl6); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1134 | return pcpu_rt; |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1135 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1136 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1137 | } |
David Ahern | 9ff7438 | 2016-06-13 13:44:19 -0700 | [diff] [blame] | 1138 | EXPORT_SYMBOL_GPL(ip6_pol_route); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1139 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1140 | static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1141 | struct flowi6 *fl6, int flags) |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 1142 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1143 | return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 1144 | } |
| 1145 | |
Mahesh Bandewar | d409b84 | 2016-09-16 12:59:08 -0700 | [diff] [blame] | 1146 | struct dst_entry *ip6_route_input_lookup(struct net *net, |
| 1147 | struct net_device *dev, |
| 1148 | struct flowi6 *fl6, int flags) |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1149 | { |
| 1150 | if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) |
| 1151 | flags |= RT6_LOOKUP_F_IFACE; |
| 1152 | |
| 1153 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); |
| 1154 | } |
Mahesh Bandewar | d409b84 | 2016-09-16 12:59:08 -0700 | [diff] [blame] | 1155 | EXPORT_SYMBOL_GPL(ip6_route_input_lookup); |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1156 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1157 | void ip6_route_input(struct sk_buff *skb) |
| 1158 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1159 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1160 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1161 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1162 | struct ip_tunnel_info *tun_info; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1163 | struct flowi6 fl6 = { |
David Ahern | e0d56fd | 2016-09-10 12:09:57 -0700 | [diff] [blame] | 1164 | .flowi6_iif = skb->dev->ifindex, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1165 | .daddr = iph->daddr, |
| 1166 | .saddr = iph->saddr, |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1167 | .flowlabel = ip6_flowinfo(iph), |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1168 | .flowi6_mark = skb->mark, |
| 1169 | .flowi6_proto = iph->nexthdr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1170 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1171 | |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1172 | tun_info = skb_tunnel_info(skb); |
Jiri Benc | 46fa062 | 2015-08-28 20:48:19 +0200 | [diff] [blame] | 1173 | if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1174 | fl6.flowi6_tun_key.tun_id = tun_info->key.tun_id; |
Jiri Benc | 06e9d04 | 2015-08-20 13:56:26 +0200 | [diff] [blame] | 1175 | skb_dst_drop(skb); |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1176 | skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1179 | static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1180 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1181 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1182 | return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1183 | } |
| 1184 | |
Paolo Abeni | 6f21c96 | 2016-01-29 12:30:19 +0100 | [diff] [blame] | 1185 | struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, |
| 1186 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1187 | { |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1188 | bool any_src; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1189 | |
David Ahern | 4c1feac | 2016-09-10 12:09:56 -0700 | [diff] [blame] | 1190 | if (rt6_need_strict(&fl6->daddr)) { |
| 1191 | struct dst_entry *dst; |
| 1192 | |
| 1193 | dst = l3mdev_link_scope_lookup(net, fl6); |
| 1194 | if (dst) |
| 1195 | return dst; |
| 1196 | } |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1197 | |
Pavel Emelyanov | 1fb9489 | 2012-08-08 21:53:36 +0000 | [diff] [blame] | 1198 | fl6->flowi6_iif = LOOPBACK_IFINDEX; |
David McCullough | 4dc27d1c | 2012-06-25 15:42:26 +0000 | [diff] [blame] | 1199 | |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1200 | any_src = ipv6_addr_any(&fl6->saddr); |
David Ahern | 741a11d | 2015-09-28 10:12:13 -0700 | [diff] [blame] | 1201 | if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr) || |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1202 | (fl6->flowi6_oif && any_src)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 1203 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1204 | |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1205 | if (!any_src) |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1206 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki / 吉藤英明 | 0c9a2ac | 2010-03-07 00:14:44 +0000 | [diff] [blame] | 1207 | else if (sk) |
| 1208 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1209 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1210 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | } |
Paolo Abeni | 6f21c96 | 2016-01-29 12:30:19 +0100 | [diff] [blame] | 1212 | EXPORT_SYMBOL_GPL(ip6_route_output_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 1214 | struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig) |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1215 | { |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 1216 | struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1217 | struct dst_entry *new = NULL; |
| 1218 | |
David S. Miller | f5b0a87 | 2012-07-19 12:31:33 -0700 | [diff] [blame] | 1219 | rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, DST_OBSOLETE_NONE, 0); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1220 | if (rt) { |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1221 | rt6_info_init(rt); |
| 1222 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1223 | new = &rt->dst; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1224 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 1225 | new->input = dst_discard; |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1226 | new->output = dst_discard_out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1227 | |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1228 | dst_copy_metrics(new, &ort->dst); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1229 | rt->rt6i_idev = ort->rt6i_idev; |
| 1230 | if (rt->rt6i_idev) |
| 1231 | in6_dev_hold(rt->rt6i_idev); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1232 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1233 | rt->rt6i_gateway = ort->rt6i_gateway; |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1234 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_PCPU; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1235 | rt->rt6i_metric = 0; |
| 1236 | |
| 1237 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1238 | #ifdef CONFIG_IPV6_SUBTREES |
| 1239 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1240 | #endif |
| 1241 | |
| 1242 | dst_free(new); |
| 1243 | } |
| 1244 | |
David S. Miller | 69ead7a | 2011-03-01 14:45:33 -0800 | [diff] [blame] | 1245 | dst_release(dst_orig); |
| 1246 | return new ? new : ERR_PTR(-ENOMEM); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1247 | } |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | /* |
| 1250 | * Destination cache support functions |
| 1251 | */ |
| 1252 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1253 | static void rt6_dst_from_metrics_check(struct rt6_info *rt) |
| 1254 | { |
| 1255 | if (rt->dst.from && |
| 1256 | dst_metrics_ptr(&rt->dst) != dst_metrics_ptr(rt->dst.from)) |
| 1257 | dst_init_metrics(&rt->dst, dst_metrics_ptr(rt->dst.from), true); |
| 1258 | } |
| 1259 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1260 | static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie) |
| 1261 | { |
| 1262 | if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie)) |
| 1263 | return NULL; |
| 1264 | |
| 1265 | if (rt6_check_expired(rt)) |
| 1266 | return NULL; |
| 1267 | |
| 1268 | return &rt->dst; |
| 1269 | } |
| 1270 | |
| 1271 | static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie) |
| 1272 | { |
Martin KaFai Lau | 5973fb1 | 2015-11-11 11:51:07 -0800 | [diff] [blame] | 1273 | if (!__rt6_check_expired(rt) && |
| 1274 | rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1275 | rt6_check((struct rt6_info *)(rt->dst.from), cookie)) |
| 1276 | return &rt->dst; |
| 1277 | else |
| 1278 | return NULL; |
| 1279 | } |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 1282 | { |
| 1283 | struct rt6_info *rt; |
| 1284 | |
| 1285 | rt = (struct rt6_info *) dst; |
| 1286 | |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 1287 | /* All IPV6 dsts are created with ->obsolete set to the value |
| 1288 | * DST_OBSOLETE_FORCE_CHK which forces validation calls down |
| 1289 | * into this function always. |
| 1290 | */ |
Hannes Frederic Sowa | e3bc10b | 2013-10-24 07:48:24 +0200 | [diff] [blame] | 1291 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1292 | rt6_dst_from_metrics_check(rt); |
| 1293 | |
Martin KaFai Lau | 02bcf4e | 2015-11-11 11:51:08 -0800 | [diff] [blame] | 1294 | if (rt->rt6i_flags & RTF_PCPU || |
| 1295 | (unlikely(dst->flags & DST_NOCACHE) && rt->dst.from)) |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1296 | return rt6_dst_from_check(rt, cookie); |
| 1297 | else |
| 1298 | return rt6_check(rt, cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 1302 | { |
| 1303 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1304 | |
| 1305 | if (rt) { |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1306 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1307 | if (rt6_check_expired(rt)) { |
| 1308 | ip6_del_rt(rt); |
| 1309 | dst = NULL; |
| 1310 | } |
| 1311 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | dst_release(dst); |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1313 | dst = NULL; |
| 1314 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1316 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | } |
| 1318 | |
| 1319 | static void ip6_link_failure(struct sk_buff *skb) |
| 1320 | { |
| 1321 | struct rt6_info *rt; |
| 1322 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1323 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1325 | rt = (struct rt6_info *) skb_dst(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | if (rt) { |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1327 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1328 | dst_hold(&rt->dst); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 1329 | ip6_del_rt(rt); |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1330 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | rt->rt6i_node->fn_sernum = -1; |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1332 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | } |
| 1334 | } |
| 1335 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1336 | static void rt6_do_update_pmtu(struct rt6_info *rt, u32 mtu) |
| 1337 | { |
| 1338 | struct net *net = dev_net(rt->dst.dev); |
| 1339 | |
| 1340 | rt->rt6i_flags |= RTF_MODIFIED; |
| 1341 | rt->rt6i_pmtu = mtu; |
| 1342 | rt6_update_expires(rt, net->ipv6.sysctl.ip6_rt_mtu_expires); |
| 1343 | } |
| 1344 | |
Martin KaFai Lau | 0d3f6d2 | 2015-11-11 11:51:06 -0800 | [diff] [blame] | 1345 | static bool rt6_cache_allowed_for_pmtu(const struct rt6_info *rt) |
| 1346 | { |
| 1347 | return !(rt->rt6i_flags & RTF_CACHE) && |
| 1348 | (rt->rt6i_flags & RTF_PCPU || rt->rt6i_node); |
| 1349 | } |
| 1350 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1351 | static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk, |
| 1352 | const struct ipv6hdr *iph, u32 mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | { |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 1354 | struct rt6_info *rt6 = (struct rt6_info *)dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1356 | if (rt6->rt6i_flags & RTF_LOCAL) |
| 1357 | return; |
| 1358 | |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1359 | dst_confirm(dst); |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1360 | mtu = max_t(u32, mtu, IPV6_MIN_MTU); |
| 1361 | if (mtu >= dst_mtu(dst)) |
| 1362 | return; |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1363 | |
Martin KaFai Lau | 0d3f6d2 | 2015-11-11 11:51:06 -0800 | [diff] [blame] | 1364 | if (!rt6_cache_allowed_for_pmtu(rt6)) { |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1365 | rt6_do_update_pmtu(rt6, mtu); |
| 1366 | } else { |
| 1367 | const struct in6_addr *daddr, *saddr; |
| 1368 | struct rt6_info *nrt6; |
Hagen Paul Pfeifer | 9d28971 | 2015-01-15 22:34:25 +0100 | [diff] [blame] | 1369 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1370 | if (iph) { |
| 1371 | daddr = &iph->daddr; |
| 1372 | saddr = &iph->saddr; |
| 1373 | } else if (sk) { |
| 1374 | daddr = &sk->sk_v6_daddr; |
| 1375 | saddr = &inet6_sk(sk)->saddr; |
| 1376 | } else { |
| 1377 | return; |
| 1378 | } |
| 1379 | nrt6 = ip6_rt_cache_alloc(rt6, daddr, saddr); |
| 1380 | if (nrt6) { |
| 1381 | rt6_do_update_pmtu(nrt6, mtu); |
| 1382 | |
| 1383 | /* ip6_ins_rt(nrt6) will bump the |
| 1384 | * rt6->rt6i_node->fn_sernum |
| 1385 | * which will fail the next rt6_check() and |
| 1386 | * invalidate the sk->sk_dst_cache. |
| 1387 | */ |
| 1388 | ip6_ins_rt(nrt6); |
| 1389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | } |
| 1391 | } |
| 1392 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1393 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 1394 | struct sk_buff *skb, u32 mtu) |
| 1395 | { |
| 1396 | __ip6_rt_update_pmtu(dst, sk, skb ? ipv6_hdr(skb) : NULL, mtu); |
| 1397 | } |
| 1398 | |
David S. Miller | 42ae66c | 2012-06-15 20:01:57 -0700 | [diff] [blame] | 1399 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, |
Lorenzo Colitti | 3b82497 | 2014-03-31 16:23:51 +0900 | [diff] [blame^] | 1400 | int oif, u32 mark, kuid_t uid) |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1401 | { |
| 1402 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1403 | struct dst_entry *dst; |
| 1404 | struct flowi6 fl6; |
| 1405 | |
| 1406 | memset(&fl6, 0, sizeof(fl6)); |
| 1407 | fl6.flowi6_oif = oif; |
Lorenzo Colitti | 1b3c61d | 2014-05-13 10:17:34 -0700 | [diff] [blame] | 1408 | fl6.flowi6_mark = mark ? mark : IP6_REPLY_MARK(net, skb->mark); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1409 | fl6.daddr = iph->daddr; |
| 1410 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1411 | fl6.flowlabel = ip6_flowinfo(iph); |
Lorenzo Colitti | 3b82497 | 2014-03-31 16:23:51 +0900 | [diff] [blame^] | 1412 | fl6.flowi6_uid = uid; |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1413 | |
| 1414 | dst = ip6_route_output(net, NULL, &fl6); |
| 1415 | if (!dst->error) |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1416 | __ip6_rt_update_pmtu(dst, NULL, iph, ntohl(mtu)); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1417 | dst_release(dst); |
| 1418 | } |
| 1419 | EXPORT_SYMBOL_GPL(ip6_update_pmtu); |
| 1420 | |
| 1421 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu) |
| 1422 | { |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 1423 | struct dst_entry *dst; |
| 1424 | |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1425 | ip6_update_pmtu(skb, sock_net(sk), mtu, |
Lorenzo Colitti | 3b82497 | 2014-03-31 16:23:51 +0900 | [diff] [blame^] | 1426 | sk->sk_bound_dev_if, sk->sk_mark, sock_i_uid(sk)); |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 1427 | |
| 1428 | dst = __sk_dst_get(sk); |
| 1429 | if (!dst || !dst->obsolete || |
| 1430 | dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) |
| 1431 | return; |
| 1432 | |
| 1433 | bh_lock_sock(sk); |
| 1434 | if (!sock_owned_by_user(sk) && !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) |
| 1435 | ip6_datagram_dst_update(sk, false); |
| 1436 | bh_unlock_sock(sk); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1437 | } |
| 1438 | EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu); |
| 1439 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1440 | /* Handle redirects */ |
| 1441 | struct ip6rd_flowi { |
| 1442 | struct flowi6 fl6; |
| 1443 | struct in6_addr gateway; |
| 1444 | }; |
| 1445 | |
| 1446 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1447 | struct fib6_table *table, |
| 1448 | struct flowi6 *fl6, |
| 1449 | int flags) |
| 1450 | { |
| 1451 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6; |
| 1452 | struct rt6_info *rt; |
| 1453 | struct fib6_node *fn; |
| 1454 | |
| 1455 | /* Get the "current" route for this destination and |
| 1456 | * check if the redirect has come from approriate router. |
| 1457 | * |
| 1458 | * RFC 4861 specifies that redirects should only be |
| 1459 | * accepted if they come from the nexthop to the target. |
| 1460 | * Due to the way the routes are chosen, this notion |
| 1461 | * is a bit fuzzy and one might need to check all possible |
| 1462 | * routes. |
| 1463 | */ |
| 1464 | |
| 1465 | read_lock_bh(&table->tb6_lock); |
| 1466 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
| 1467 | restart: |
| 1468 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
| 1469 | if (rt6_check_expired(rt)) |
| 1470 | continue; |
| 1471 | if (rt->dst.error) |
| 1472 | break; |
| 1473 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1474 | continue; |
| 1475 | if (fl6->flowi6_oif != rt->dst.dev->ifindex) |
| 1476 | continue; |
| 1477 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
| 1478 | continue; |
| 1479 | break; |
| 1480 | } |
| 1481 | |
| 1482 | if (!rt) |
| 1483 | rt = net->ipv6.ip6_null_entry; |
| 1484 | else if (rt->dst.error) { |
| 1485 | rt = net->ipv6.ip6_null_entry; |
Martin KaFai Lau | b0a1ba5 | 2015-01-20 19:16:02 -0800 | [diff] [blame] | 1486 | goto out; |
| 1487 | } |
| 1488 | |
| 1489 | if (rt == net->ipv6.ip6_null_entry) { |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1490 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 1491 | if (fn) |
| 1492 | goto restart; |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1493 | } |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1494 | |
Martin KaFai Lau | b0a1ba5 | 2015-01-20 19:16:02 -0800 | [diff] [blame] | 1495 | out: |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1496 | dst_hold(&rt->dst); |
| 1497 | |
| 1498 | read_unlock_bh(&table->tb6_lock); |
| 1499 | |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1500 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1501 | return rt; |
| 1502 | }; |
| 1503 | |
| 1504 | static struct dst_entry *ip6_route_redirect(struct net *net, |
| 1505 | const struct flowi6 *fl6, |
| 1506 | const struct in6_addr *gateway) |
| 1507 | { |
| 1508 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
| 1509 | struct ip6rd_flowi rdfl; |
| 1510 | |
| 1511 | rdfl.fl6 = *fl6; |
| 1512 | rdfl.gateway = *gateway; |
| 1513 | |
| 1514 | return fib6_rule_lookup(net, &rdfl.fl6, |
| 1515 | flags, __ip6_route_redirect); |
| 1516 | } |
| 1517 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1518 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark) |
| 1519 | { |
| 1520 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1521 | struct dst_entry *dst; |
| 1522 | struct flowi6 fl6; |
| 1523 | |
| 1524 | memset(&fl6, 0, sizeof(fl6)); |
Julian Anastasov | e374c61 | 2014-04-28 10:51:56 +0300 | [diff] [blame] | 1525 | fl6.flowi6_iif = LOOPBACK_IFINDEX; |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1526 | fl6.flowi6_oif = oif; |
| 1527 | fl6.flowi6_mark = mark; |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1528 | fl6.daddr = iph->daddr; |
| 1529 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1530 | fl6.flowlabel = ip6_flowinfo(iph); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1531 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1532 | dst = ip6_route_redirect(net, &fl6, &ipv6_hdr(skb)->saddr); |
| 1533 | rt6_do_redirect(dst, NULL, skb); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1534 | dst_release(dst); |
| 1535 | } |
| 1536 | EXPORT_SYMBOL_GPL(ip6_redirect); |
| 1537 | |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1538 | void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, |
| 1539 | u32 mark) |
| 1540 | { |
| 1541 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
| 1542 | const struct rd_msg *msg = (struct rd_msg *)icmp6_hdr(skb); |
| 1543 | struct dst_entry *dst; |
| 1544 | struct flowi6 fl6; |
| 1545 | |
| 1546 | memset(&fl6, 0, sizeof(fl6)); |
Julian Anastasov | e374c61 | 2014-04-28 10:51:56 +0300 | [diff] [blame] | 1547 | fl6.flowi6_iif = LOOPBACK_IFINDEX; |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1548 | fl6.flowi6_oif = oif; |
| 1549 | fl6.flowi6_mark = mark; |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1550 | fl6.daddr = msg->dest; |
| 1551 | fl6.saddr = iph->daddr; |
| 1552 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1553 | dst = ip6_route_redirect(net, &fl6, &iph->saddr); |
| 1554 | rt6_do_redirect(dst, NULL, skb); |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1555 | dst_release(dst); |
| 1556 | } |
| 1557 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1558 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk) |
| 1559 | { |
| 1560 | ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark); |
| 1561 | } |
| 1562 | EXPORT_SYMBOL_GPL(ip6_sk_redirect); |
| 1563 | |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1564 | static unsigned int ip6_default_advmss(const struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | { |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1566 | struct net_device *dev = dst->dev; |
| 1567 | unsigned int mtu = dst_mtu(dst); |
| 1568 | struct net *net = dev_net(dev); |
| 1569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 1571 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1572 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 1573 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
| 1575 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1576 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 1577 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 1578 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | * rely only on pmtu discovery" |
| 1580 | */ |
| 1581 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 1582 | mtu = IPV6_MAXPLEN; |
| 1583 | return mtu; |
| 1584 | } |
| 1585 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 1586 | static unsigned int ip6_mtu(const struct dst_entry *dst) |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1587 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1588 | const struct rt6_info *rt = (const struct rt6_info *)dst; |
| 1589 | unsigned int mtu = rt->rt6i_pmtu; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1590 | struct inet6_dev *idev; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1591 | |
| 1592 | if (mtu) |
Eric Dumazet | 30f78d8 | 2014-04-10 21:23:36 -0700 | [diff] [blame] | 1593 | goto out; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1594 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1595 | mtu = dst_metric_raw(dst, RTAX_MTU); |
| 1596 | if (mtu) |
| 1597 | goto out; |
| 1598 | |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1599 | mtu = IPV6_MIN_MTU; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1600 | |
| 1601 | rcu_read_lock(); |
| 1602 | idev = __in6_dev_get(dst->dev); |
| 1603 | if (idev) |
| 1604 | mtu = idev->cnf.mtu6; |
| 1605 | rcu_read_unlock(); |
| 1606 | |
Eric Dumazet | 30f78d8 | 2014-04-10 21:23:36 -0700 | [diff] [blame] | 1607 | out: |
Roopa Prabhu | 14972cb | 2016-08-24 20:10:43 -0700 | [diff] [blame] | 1608 | mtu = min_t(unsigned int, mtu, IP6_MAX_MTU); |
| 1609 | |
| 1610 | return mtu - lwtunnel_headroom(dst->lwtstate, mtu); |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1611 | } |
| 1612 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1613 | static struct dst_entry *icmp6_dst_gc_list; |
| 1614 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1615 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1616 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1617 | struct flowi6 *fl6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | { |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1619 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | struct rt6_info *rt; |
| 1621 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1622 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1624 | if (unlikely(!idev)) |
Eric Dumazet | 122bdf6 | 2012-03-14 21:13:11 +0000 | [diff] [blame] | 1625 | return ERR_PTR(-ENODEV); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 1627 | rt = ip6_dst_alloc(net, dev, 0); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1628 | if (unlikely(!rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | in6_dev_put(idev); |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1630 | dst = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | goto out; |
| 1632 | } |
| 1633 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1634 | rt->dst.flags |= DST_HOST; |
| 1635 | rt->dst.output = ip6_output; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1636 | atomic_set(&rt->dst.__refcnt, 1); |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 1637 | rt->rt6i_gateway = fl6->daddr; |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1638 | rt->rt6i_dst.addr = fl6->daddr; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1639 | rt->rt6i_dst.plen = 128; |
| 1640 | rt->rt6i_idev = idev; |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 1641 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1643 | spin_lock_bh(&icmp6_dst_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1644 | rt->dst.next = icmp6_dst_gc_list; |
| 1645 | icmp6_dst_gc_list = &rt->dst; |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1646 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1648 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1650 | dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0); |
| 1651 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | out: |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1653 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | } |
| 1655 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1656 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | { |
Hagen Paul Pfeifer | e9476e9 | 2011-02-25 05:45:19 +0000 | [diff] [blame] | 1658 | struct dst_entry *dst, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1659 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1661 | spin_lock_bh(&icmp6_dst_lock); |
| 1662 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | while ((dst = *pprev) != NULL) { |
| 1665 | if (!atomic_read(&dst->__refcnt)) { |
| 1666 | *pprev = dst->next; |
| 1667 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | } else { |
| 1669 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1670 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | } |
| 1672 | } |
| 1673 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1674 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1675 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1676 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | } |
| 1678 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1679 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1680 | void *arg) |
| 1681 | { |
| 1682 | struct dst_entry *dst, **pprev; |
| 1683 | |
| 1684 | spin_lock_bh(&icmp6_dst_lock); |
| 1685 | pprev = &icmp6_dst_gc_list; |
| 1686 | while ((dst = *pprev) != NULL) { |
| 1687 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1688 | if (func(rt, arg)) { |
| 1689 | *pprev = dst->next; |
| 1690 | dst_free(dst); |
| 1691 | } else { |
| 1692 | pprev = &dst->next; |
| 1693 | } |
| 1694 | } |
| 1695 | spin_unlock_bh(&icmp6_dst_lock); |
| 1696 | } |
| 1697 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1698 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | { |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1700 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1701 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1702 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1703 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1704 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1705 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1706 | int entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1708 | entries = dst_entries_get_fast(ops); |
Michal Kubeček | 49a18d8 | 2013-08-01 10:04:24 +0200 | [diff] [blame] | 1709 | if (time_after(rt_last_gc + rt_min_interval, jiffies) && |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1710 | entries <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | goto out; |
| 1712 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1713 | net->ipv6.ip6_rt_gc_expire++; |
Li RongQing | 1495664 | 2014-05-19 17:30:28 +0800 | [diff] [blame] | 1714 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net, true); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1715 | entries = dst_entries_get_slow(ops); |
| 1716 | if (entries < ops->gc_thresh) |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1717 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1719 | net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1720 | return entries > rt_max_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | } |
| 1722 | |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1723 | static int ip6_convert_metrics(struct mx6_config *mxc, |
| 1724 | const struct fib6_config *cfg) |
| 1725 | { |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1726 | bool ecn_ca = false; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1727 | struct nlattr *nla; |
| 1728 | int remaining; |
| 1729 | u32 *mp; |
| 1730 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1731 | if (!cfg->fc_mx) |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1732 | return 0; |
| 1733 | |
| 1734 | mp = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL); |
| 1735 | if (unlikely(!mp)) |
| 1736 | return -ENOMEM; |
| 1737 | |
| 1738 | nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) { |
| 1739 | int type = nla_type(nla); |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1740 | u32 val; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1741 | |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1742 | if (!type) |
| 1743 | continue; |
| 1744 | if (unlikely(type > RTAX_MAX)) |
| 1745 | goto err; |
Daniel Borkmann | ea69763 | 2015-01-05 23:57:47 +0100 | [diff] [blame] | 1746 | |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1747 | if (type == RTAX_CC_ALGO) { |
| 1748 | char tmp[TCP_CA_NAME_MAX]; |
| 1749 | |
| 1750 | nla_strlcpy(tmp, nla, sizeof(tmp)); |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1751 | val = tcp_ca_get_key_by_name(tmp, &ecn_ca); |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1752 | if (val == TCP_CA_UNSPEC) |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1753 | goto err; |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1754 | } else { |
| 1755 | val = nla_get_u32(nla); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1756 | } |
Paolo Abeni | 626abd5 | 2016-05-13 18:33:41 +0200 | [diff] [blame] | 1757 | if (type == RTAX_HOPLIMIT && val > 255) |
| 1758 | val = 255; |
Daniel Borkmann | b8d3e41 | 2015-08-31 15:58:46 +0200 | [diff] [blame] | 1759 | if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK)) |
| 1760 | goto err; |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1761 | |
| 1762 | mp[type - 1] = val; |
| 1763 | __set_bit(type - 1, mxc->mx_valid); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1764 | } |
| 1765 | |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1766 | if (ecn_ca) { |
| 1767 | __set_bit(RTAX_FEATURES - 1, mxc->mx_valid); |
| 1768 | mp[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA; |
| 1769 | } |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1770 | |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1771 | mxc->mx = mp; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1772 | return 0; |
| 1773 | err: |
| 1774 | kfree(mp); |
| 1775 | return -EINVAL; |
| 1776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
David Ahern | 8c14586 | 2016-04-24 21:26:04 -0700 | [diff] [blame] | 1778 | static struct rt6_info *ip6_nh_lookup_table(struct net *net, |
| 1779 | struct fib6_config *cfg, |
| 1780 | const struct in6_addr *gw_addr) |
| 1781 | { |
| 1782 | struct flowi6 fl6 = { |
| 1783 | .flowi6_oif = cfg->fc_ifindex, |
| 1784 | .daddr = *gw_addr, |
| 1785 | .saddr = cfg->fc_prefsrc, |
| 1786 | }; |
| 1787 | struct fib6_table *table; |
| 1788 | struct rt6_info *rt; |
Paolo Abeni | 48f1dcb | 2016-06-23 15:25:09 +0200 | [diff] [blame] | 1789 | int flags = RT6_LOOKUP_F_IFACE; |
David Ahern | 8c14586 | 2016-04-24 21:26:04 -0700 | [diff] [blame] | 1790 | |
| 1791 | table = fib6_get_table(net, cfg->fc_table); |
| 1792 | if (!table) |
| 1793 | return NULL; |
| 1794 | |
| 1795 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) |
| 1796 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 1797 | |
| 1798 | rt = ip6_pol_route(net, table, cfg->fc_ifindex, &fl6, flags); |
| 1799 | |
| 1800 | /* if table lookup failed, fall back to full lookup */ |
| 1801 | if (rt == net->ipv6.ip6_null_entry) { |
| 1802 | ip6_rt_put(rt); |
| 1803 | rt = NULL; |
| 1804 | } |
| 1805 | |
| 1806 | return rt; |
| 1807 | } |
| 1808 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1809 | static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | { |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1811 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | struct rt6_info *rt = NULL; |
| 1813 | struct net_device *dev = NULL; |
| 1814 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1815 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | int addr_type; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1817 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1819 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1820 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1822 | if (cfg->fc_src_len) |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1823 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1825 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1827 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | if (!dev) |
| 1829 | goto out; |
| 1830 | idev = in6_dev_get(dev); |
| 1831 | if (!idev) |
| 1832 | goto out; |
| 1833 | } |
| 1834 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1835 | if (cfg->fc_metric == 0) |
| 1836 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1838 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1839 | if (cfg->fc_nlinfo.nlh && |
| 1840 | !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) { |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1841 | table = fib6_get_table(net, cfg->fc_table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1842 | if (!table) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1843 | pr_warn("NLM_F_CREATE should be specified when creating new route\n"); |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1844 | table = fib6_new_table(net, cfg->fc_table); |
| 1845 | } |
| 1846 | } else { |
| 1847 | table = fib6_new_table(net, cfg->fc_table); |
| 1848 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1849 | |
| 1850 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1851 | goto out; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1852 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 1853 | rt = ip6_dst_alloc(net, NULL, |
| 1854 | (cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1856 | if (!rt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | err = -ENOMEM; |
| 1858 | goto out; |
| 1859 | } |
| 1860 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1861 | if (cfg->fc_flags & RTF_EXPIRES) |
| 1862 | rt6_set_expires(rt, jiffies + |
| 1863 | clock_t_to_jiffies(cfg->fc_expires)); |
| 1864 | else |
| 1865 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1867 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1868 | cfg->fc_protocol = RTPROT_BOOT; |
| 1869 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1870 | |
| 1871 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
| 1873 | if (addr_type & IPV6_ADDR_MULTICAST) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1874 | rt->dst.input = ip6_mc_input; |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 1875 | else if (cfg->fc_flags & RTF_LOCAL) |
| 1876 | rt->dst.input = ip6_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | else |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1878 | rt->dst.input = ip6_forward; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1880 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1882 | if (cfg->fc_encap) { |
| 1883 | struct lwtunnel_state *lwtstate; |
| 1884 | |
| 1885 | err = lwtunnel_build_state(dev, cfg->fc_encap_type, |
Tom Herbert | 127eb7c | 2015-08-24 09:45:41 -0700 | [diff] [blame] | 1886 | cfg->fc_encap, AF_INET6, cfg, |
| 1887 | &lwtstate); |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1888 | if (err) |
| 1889 | goto out; |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 1890 | rt->dst.lwtstate = lwtstate_get(lwtstate); |
| 1891 | if (lwtunnel_output_redirect(rt->dst.lwtstate)) { |
| 1892 | rt->dst.lwtstate->orig_output = rt->dst.output; |
| 1893 | rt->dst.output = lwtunnel_output; |
Tom Herbert | 2536862 | 2015-08-17 13:42:24 -0700 | [diff] [blame] | 1894 | } |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 1895 | if (lwtunnel_input_redirect(rt->dst.lwtstate)) { |
| 1896 | rt->dst.lwtstate->orig_input = rt->dst.input; |
| 1897 | rt->dst.input = lwtunnel_input; |
Tom Herbert | 2536862 | 2015-08-17 13:42:24 -0700 | [diff] [blame] | 1898 | } |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1899 | } |
| 1900 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1901 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1902 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Martin KaFai Lau | afc4eef | 2015-04-28 13:03:07 -0700 | [diff] [blame] | 1903 | if (rt->rt6i_dst.plen == 128) |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 1904 | rt->dst.flags |= DST_HOST; |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 1905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1907 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1908 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | #endif |
| 1910 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1911 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | |
| 1913 | /* We cannot add true routes via loopback here, |
| 1914 | they would result in kernel looping; promote them to reject routes |
| 1915 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1916 | if ((cfg->fc_flags & RTF_REJECT) || |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1917 | (dev && (dev->flags & IFF_LOOPBACK) && |
| 1918 | !(addr_type & IPV6_ADDR_LOOPBACK) && |
| 1919 | !(cfg->fc_flags & RTF_LOCAL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1921 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | if (dev) { |
| 1923 | dev_put(dev); |
| 1924 | in6_dev_put(idev); |
| 1925 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1926 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | dev_hold(dev); |
| 1928 | idev = in6_dev_get(dev); |
| 1929 | if (!idev) { |
| 1930 | err = -ENODEV; |
| 1931 | goto out; |
| 1932 | } |
| 1933 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1935 | switch (cfg->fc_type) { |
| 1936 | case RTN_BLACKHOLE: |
| 1937 | rt->dst.error = -EINVAL; |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1938 | rt->dst.output = dst_discard_out; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1939 | rt->dst.input = dst_discard; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1940 | break; |
| 1941 | case RTN_PROHIBIT: |
| 1942 | rt->dst.error = -EACCES; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1943 | rt->dst.output = ip6_pkt_prohibit_out; |
| 1944 | rt->dst.input = ip6_pkt_prohibit; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1945 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 1946 | case RTN_THROW: |
Nikola Forró | 0315e38 | 2015-09-17 16:01:32 +0200 | [diff] [blame] | 1947 | case RTN_UNREACHABLE: |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1948 | default: |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1949 | rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN |
Nikola Forró | 0315e38 | 2015-09-17 16:01:32 +0200 | [diff] [blame] | 1950 | : (cfg->fc_type == RTN_UNREACHABLE) |
| 1951 | ? -EHOSTUNREACH : -ENETUNREACH; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1952 | rt->dst.output = ip6_pkt_discard_out; |
| 1953 | rt->dst.input = ip6_pkt_discard; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1954 | break; |
| 1955 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | goto install_route; |
| 1957 | } |
| 1958 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1959 | if (cfg->fc_flags & RTF_GATEWAY) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1960 | const struct in6_addr *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | int gwa_type; |
| 1962 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1963 | gw_addr = &cfg->fc_gateway; |
Florian Westphal | 330567b | 2015-08-07 10:54:28 +0200 | [diff] [blame] | 1964 | gwa_type = ipv6_addr_type(gw_addr); |
Florian Westphal | 48ed7b2 | 2015-05-21 00:25:41 +0200 | [diff] [blame] | 1965 | |
| 1966 | /* if gw_addr is local we will fail to detect this in case |
| 1967 | * address is still TENTATIVE (DAD in progress). rt6_lookup() |
| 1968 | * will return already-added prefix route via interface that |
| 1969 | * prefix route was assigned to, which might be non-loopback. |
| 1970 | */ |
| 1971 | err = -EINVAL; |
Florian Westphal | 330567b | 2015-08-07 10:54:28 +0200 | [diff] [blame] | 1972 | if (ipv6_chk_addr_and_flags(net, gw_addr, |
| 1973 | gwa_type & IPV6_ADDR_LINKLOCAL ? |
| 1974 | dev : NULL, 0, 0)) |
Florian Westphal | 48ed7b2 | 2015-05-21 00:25:41 +0200 | [diff] [blame] | 1975 | goto out; |
| 1976 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1977 | rt->rt6i_gateway = *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | |
| 1979 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
David Ahern | 8c14586 | 2016-04-24 21:26:04 -0700 | [diff] [blame] | 1980 | struct rt6_info *grt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | |
| 1982 | /* IPv6 strictly inhibits using not link-local |
| 1983 | addresses as nexthop address. |
| 1984 | Otherwise, router will not able to send redirects. |
| 1985 | It is very good, but in some (rare!) circumstances |
| 1986 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1987 | some exceptions. --ANK |
| 1988 | */ |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1989 | if (!(gwa_type & IPV6_ADDR_UNICAST)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | goto out; |
| 1991 | |
Vincent Bernat | a435a07 | 2016-09-18 17:46:07 +0200 | [diff] [blame] | 1992 | if (cfg->fc_table) { |
David Ahern | 8c14586 | 2016-04-24 21:26:04 -0700 | [diff] [blame] | 1993 | grt = ip6_nh_lookup_table(net, cfg, gw_addr); |
| 1994 | |
Vincent Bernat | a435a07 | 2016-09-18 17:46:07 +0200 | [diff] [blame] | 1995 | if (grt) { |
| 1996 | if (grt->rt6i_flags & RTF_GATEWAY || |
| 1997 | (dev && dev != grt->dst.dev)) { |
| 1998 | ip6_rt_put(grt); |
| 1999 | grt = NULL; |
| 2000 | } |
| 2001 | } |
| 2002 | } |
| 2003 | |
David Ahern | 8c14586 | 2016-04-24 21:26:04 -0700 | [diff] [blame] | 2004 | if (!grt) |
| 2005 | grt = rt6_lookup(net, gw_addr, NULL, |
| 2006 | cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | |
| 2008 | err = -EHOSTUNREACH; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2009 | if (!grt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | goto out; |
| 2011 | if (dev) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2012 | if (dev != grt->dst.dev) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2013 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | goto out; |
| 2015 | } |
| 2016 | } else { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2017 | dev = grt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | idev = grt->rt6i_idev; |
| 2019 | dev_hold(dev); |
| 2020 | in6_dev_hold(grt->rt6i_idev); |
| 2021 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2022 | if (!(grt->rt6i_flags & RTF_GATEWAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | err = 0; |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2024 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | |
| 2026 | if (err) |
| 2027 | goto out; |
| 2028 | } |
| 2029 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2030 | if (!dev || (dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | goto out; |
| 2032 | } |
| 2033 | |
| 2034 | err = -ENODEV; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2035 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | goto out; |
| 2037 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2038 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) { |
| 2039 | if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { |
| 2040 | err = -EINVAL; |
| 2041 | goto out; |
| 2042 | } |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2043 | rt->rt6i_prefsrc.addr = cfg->fc_prefsrc; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2044 | rt->rt6i_prefsrc.plen = 128; |
| 2045 | } else |
| 2046 | rt->rt6i_prefsrc.plen = 0; |
| 2047 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2048 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
| 2050 | install_route: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2051 | rt->dst.dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2053 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 2054 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2055 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 2056 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2057 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | out: |
| 2059 | if (dev) |
| 2060 | dev_put(dev); |
| 2061 | if (idev) |
| 2062 | in6_dev_put(idev); |
| 2063 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2064 | dst_free(&rt->dst); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2065 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2066 | return ERR_PTR(err); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2067 | } |
| 2068 | |
| 2069 | int ip6_route_add(struct fib6_config *cfg) |
| 2070 | { |
| 2071 | struct mx6_config mxc = { .mx = NULL, }; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2072 | struct rt6_info *rt; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2073 | int err; |
| 2074 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2075 | rt = ip6_route_info_create(cfg); |
| 2076 | if (IS_ERR(rt)) { |
| 2077 | err = PTR_ERR(rt); |
| 2078 | rt = NULL; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2079 | goto out; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2080 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2081 | |
| 2082 | err = ip6_convert_metrics(&mxc, cfg); |
| 2083 | if (err) |
| 2084 | goto out; |
| 2085 | |
| 2086 | err = __ip6_ins_rt(rt, &cfg->fc_nlinfo, &mxc); |
| 2087 | |
| 2088 | kfree(mxc.mx); |
| 2089 | |
| 2090 | return err; |
| 2091 | out: |
| 2092 | if (rt) |
| 2093 | dst_free(&rt->dst); |
| 2094 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | return err; |
| 2096 | } |
| 2097 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2098 | static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | { |
| 2100 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2101 | struct fib6_table *table; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2102 | struct net *net = dev_net(rt->dst.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 2104 | if (rt == net->ipv6.ip6_null_entry || |
| 2105 | rt->dst.flags & DST_NOCACHE) { |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 2106 | err = -ENOENT; |
| 2107 | goto out; |
| 2108 | } |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 2109 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2110 | table = rt->rt6i_table; |
| 2111 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2112 | err = fib6_del(rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2113 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 2115 | out: |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2116 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | return err; |
| 2118 | } |
| 2119 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2120 | int ip6_del_rt(struct rt6_info *rt) |
| 2121 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 2122 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2123 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 2124 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2125 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2126 | } |
| 2127 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2128 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2130 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | struct fib6_node *fn; |
| 2132 | struct rt6_info *rt; |
| 2133 | int err = -ESRCH; |
| 2134 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2135 | table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2136 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2137 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2139 | read_lock_bh(&table->tb6_lock); |
| 2140 | |
| 2141 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2142 | &cfg->fc_dst, cfg->fc_dst_len, |
| 2143 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | if (fn) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2146 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
Martin KaFai Lau | 1f56a01 | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2147 | if ((rt->rt6i_flags & RTF_CACHE) && |
| 2148 | !(cfg->fc_flags & RTF_CACHE)) |
| 2149 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2150 | if (cfg->fc_ifindex && |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2151 | (!rt->dst.dev || |
| 2152 | rt->dst.dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2154 | if (cfg->fc_flags & RTF_GATEWAY && |
| 2155 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2157 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2159 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2160 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2162 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } |
| 2164 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2165 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | |
| 2167 | return err; |
| 2168 | } |
| 2169 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 2170 | static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb) |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 2171 | { |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 2172 | struct netevent_redirect netevent; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2173 | struct rt6_info *rt, *nrt = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2174 | struct ndisc_options ndopts; |
| 2175 | struct inet6_dev *in6_dev; |
| 2176 | struct neighbour *neigh; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2177 | struct rd_msg *msg; |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2178 | int optlen, on_link; |
| 2179 | u8 *lladdr; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2180 | |
Simon Horman | 29a3cad | 2013-05-28 20:34:26 +0000 | [diff] [blame] | 2181 | optlen = skb_tail_pointer(skb) - skb_transport_header(skb); |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2182 | optlen -= sizeof(*msg); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2183 | |
| 2184 | if (optlen < 0) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2185 | net_dbg_ratelimited("rt6_do_redirect: packet too short\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2186 | return; |
| 2187 | } |
| 2188 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2189 | msg = (struct rd_msg *)icmp6_hdr(skb); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2190 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2191 | if (ipv6_addr_is_multicast(&msg->dest)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2192 | net_dbg_ratelimited("rt6_do_redirect: destination address is multicast\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2193 | return; |
| 2194 | } |
| 2195 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2196 | on_link = 0; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2197 | if (ipv6_addr_equal(&msg->dest, &msg->target)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2198 | on_link = 1; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2199 | } else if (ipv6_addr_type(&msg->target) != |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2200 | (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2201 | net_dbg_ratelimited("rt6_do_redirect: target address is not link-local unicast\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2202 | return; |
| 2203 | } |
| 2204 | |
| 2205 | in6_dev = __in6_dev_get(skb->dev); |
| 2206 | if (!in6_dev) |
| 2207 | return; |
| 2208 | if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects) |
| 2209 | return; |
| 2210 | |
| 2211 | /* RFC2461 8.1: |
| 2212 | * The IP source address of the Redirect MUST be the same as the current |
| 2213 | * first-hop router for the specified ICMP Destination Address. |
| 2214 | */ |
| 2215 | |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2216 | if (!ndisc_parse_options(skb->dev, msg->opt, optlen, &ndopts)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2217 | net_dbg_ratelimited("rt6_redirect: invalid ND options\n"); |
| 2218 | return; |
| 2219 | } |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2220 | |
| 2221 | lladdr = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2222 | if (ndopts.nd_opts_tgt_lladdr) { |
| 2223 | lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, |
| 2224 | skb->dev); |
| 2225 | if (!lladdr) { |
| 2226 | net_dbg_ratelimited("rt6_redirect: invalid link-layer address length\n"); |
| 2227 | return; |
| 2228 | } |
| 2229 | } |
| 2230 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2231 | rt = (struct rt6_info *) dst; |
Matthias Schiffer | ec13ad1 | 2015-11-02 01:24:38 +0100 | [diff] [blame] | 2232 | if (rt->rt6i_flags & RTF_REJECT) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2233 | net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n"); |
| 2234 | return; |
| 2235 | } |
| 2236 | |
| 2237 | /* Redirect received -> path was valid. |
| 2238 | * Look, redirects are sent only in response to data packets, |
| 2239 | * so that this nexthop apparently is reachable. --ANK |
| 2240 | */ |
| 2241 | dst_confirm(&rt->dst); |
| 2242 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2243 | neigh = __neigh_lookup(&nd_tbl, &msg->target, skb->dev, 1); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2244 | if (!neigh) |
| 2245 | return; |
| 2246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | /* |
| 2248 | * We have finally decided to accept it. |
| 2249 | */ |
| 2250 | |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2251 | ndisc_update(skb->dev, neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 2253 | NEIGH_UPDATE_F_OVERRIDE| |
| 2254 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2255 | NEIGH_UPDATE_F_ISROUTER)), |
| 2256 | NDISC_REDIRECT, &ndopts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2258 | nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2259 | if (!nrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | goto out; |
| 2261 | |
| 2262 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 2263 | if (on_link) |
| 2264 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 2265 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2266 | nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 2268 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | goto out; |
| 2270 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2271 | netevent.old = &rt->dst; |
| 2272 | netevent.new = &nrt->dst; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2273 | netevent.daddr = &msg->dest; |
YOSHIFUJI Hideaki / 吉藤英明 | 6059283 | 2013-01-14 09:28:27 +0000 | [diff] [blame] | 2274 | netevent.neigh = neigh; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 2275 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 2276 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2277 | if (rt->rt6i_flags & RTF_CACHE) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2278 | rt = (struct rt6_info *) dst_clone(&rt->dst); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2279 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | } |
| 2281 | |
| 2282 | out: |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2283 | neigh_release(neigh); |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2284 | } |
| 2285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | * Misc support functions |
| 2288 | */ |
| 2289 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 2290 | static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from) |
| 2291 | { |
| 2292 | BUG_ON(from->dst.from); |
| 2293 | |
| 2294 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 2295 | dst_hold(&from->dst); |
| 2296 | rt->dst.from = &from->dst; |
| 2297 | dst_init_metrics(&rt->dst, dst_metrics_ptr(&from->dst), true); |
| 2298 | } |
| 2299 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2300 | static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | { |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2302 | rt->dst.input = ort->dst.input; |
| 2303 | rt->dst.output = ort->dst.output; |
| 2304 | rt->rt6i_dst = ort->rt6i_dst; |
| 2305 | rt->dst.error = ort->dst.error; |
| 2306 | rt->rt6i_idev = ort->rt6i_idev; |
| 2307 | if (rt->rt6i_idev) |
| 2308 | in6_dev_hold(rt->rt6i_idev); |
| 2309 | rt->dst.lastuse = jiffies; |
| 2310 | rt->rt6i_gateway = ort->rt6i_gateway; |
| 2311 | rt->rt6i_flags = ort->rt6i_flags; |
| 2312 | rt6_set_from(rt, ort); |
| 2313 | rt->rt6i_metric = ort->rt6i_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | #ifdef CONFIG_IPV6_SUBTREES |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2315 | rt->rt6i_src = ort->rt6i_src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | #endif |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2317 | rt->rt6i_prefsrc = ort->rt6i_prefsrc; |
| 2318 | rt->rt6i_table = ort->rt6i_table; |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 2319 | rt->dst.lwtstate = lwtstate_get(ort->dst.lwtstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | } |
| 2321 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2322 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2323 | static struct rt6_info *rt6_get_route_info(struct net_device *dev, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2324 | const struct in6_addr *prefix, int prefixlen, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2325 | const struct in6_addr *gwaddr) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2326 | { |
| 2327 | struct fib6_node *fn; |
| 2328 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2329 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2330 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2331 | table = fib6_get_table(dev_net(dev), |
| 2332 | addrconf_rt_table(dev, RT6_TABLE_INFO)); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2333 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2334 | return NULL; |
| 2335 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2336 | read_lock_bh(&table->tb6_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2337 | fn = fib6_locate(&table->tb6_root, prefix, prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2338 | if (!fn) |
| 2339 | goto out; |
| 2340 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2341 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2342 | if (rt->dst.dev->ifindex != dev->ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2343 | continue; |
| 2344 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 2345 | continue; |
| 2346 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 2347 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2348 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2349 | break; |
| 2350 | } |
| 2351 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2352 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2353 | return rt; |
| 2354 | } |
| 2355 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2356 | static struct rt6_info *rt6_add_route_info(struct net_device *dev, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2357 | const struct in6_addr *prefix, int prefixlen, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2358 | const struct in6_addr *gwaddr, unsigned int pref) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2359 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2360 | struct fib6_config cfg = { |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 2361 | .fc_metric = IP6_RT_PRIO_USER, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2362 | .fc_ifindex = dev->ifindex, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2363 | .fc_dst_len = prefixlen, |
| 2364 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 2365 | RTF_UP | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2366 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2367 | .fc_nlinfo.nlh = NULL, |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2368 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2369 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2370 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2371 | cfg.fc_table = l3mdev_fib_table_by_index(dev_net(dev), dev->ifindex) ? : addrconf_rt_table(dev, RT6_TABLE_INFO); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2372 | cfg.fc_dst = *prefix; |
| 2373 | cfg.fc_gateway = *gwaddr; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2374 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 2375 | /* We should treat it as a default route if prefix length is 0. */ |
| 2376 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2377 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2378 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2379 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2380 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2381 | return rt6_get_route_info(dev, prefix, prefixlen, gwaddr); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2382 | } |
| 2383 | #endif |
| 2384 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2385 | struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev) |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2386 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2388 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2390 | table = fib6_get_table(dev_net(dev), |
| 2391 | addrconf_rt_table(dev, RT6_TABLE_MAIN)); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2392 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2393 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2395 | read_lock_bh(&table->tb6_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2396 | for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2397 | if (dev == rt->dst.dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 2398 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 2400 | break; |
| 2401 | } |
| 2402 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2403 | dst_hold(&rt->dst); |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2404 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | return rt; |
| 2406 | } |
| 2407 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2408 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 2409 | struct net_device *dev, |
| 2410 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2412 | struct fib6_config cfg = { |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2413 | .fc_table = l3mdev_fib_table(dev) ? : addrconf_rt_table(dev, RT6_TABLE_DFLT), |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 2414 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2415 | .fc_ifindex = dev->ifindex, |
| 2416 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 2417 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2418 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2419 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2420 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2421 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2423 | cfg.fc_gateway = *gwaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2425 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | return rt6_get_dflt_router(gwaddr, dev); |
| 2428 | } |
| 2429 | |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2430 | |
| 2431 | int rt6_addrconf_purge(struct rt6_info *rt, void *arg) { |
| 2432 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) && |
| 2433 | (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) |
| 2434 | return -1; |
| 2435 | return 0; |
| 2436 | } |
| 2437 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 2438 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | { |
Lorenzo Colitti | 9fcb87d | 2014-03-26 19:35:41 +0900 | [diff] [blame] | 2440 | fib6_clean_all(net, rt6_addrconf_purge, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | } |
| 2442 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2443 | static void rtmsg_to_fib6_config(struct net *net, |
| 2444 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2445 | struct fib6_config *cfg) |
| 2446 | { |
| 2447 | memset(cfg, 0, sizeof(*cfg)); |
| 2448 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2449 | cfg->fc_table = l3mdev_fib_table_by_index(net, rtmsg->rtmsg_ifindex) ? |
| 2450 | : RT6_TABLE_MAIN; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2451 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 2452 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 2453 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 2454 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 2455 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 2456 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 2457 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2458 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 2459 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2460 | cfg->fc_dst = rtmsg->rtmsg_dst; |
| 2461 | cfg->fc_src = rtmsg->rtmsg_src; |
| 2462 | cfg->fc_gateway = rtmsg->rtmsg_gateway; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2463 | } |
| 2464 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2465 | int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2467 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | struct in6_rtmsg rtmsg; |
| 2469 | int err; |
| 2470 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2471 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | case SIOCADDRT: /* Add a route */ |
| 2473 | case SIOCDELRT: /* Delete a route */ |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2474 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | return -EPERM; |
| 2476 | err = copy_from_user(&rtmsg, arg, |
| 2477 | sizeof(struct in6_rtmsg)); |
| 2478 | if (err) |
| 2479 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2480 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2481 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | rtnl_lock(); |
| 2484 | switch (cmd) { |
| 2485 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2486 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | break; |
| 2488 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2489 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | break; |
| 2491 | default: |
| 2492 | err = -EINVAL; |
| 2493 | } |
| 2494 | rtnl_unlock(); |
| 2495 | |
| 2496 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | |
| 2499 | return -EINVAL; |
| 2500 | } |
| 2501 | |
| 2502 | /* |
| 2503 | * Drop the packet on the floor |
| 2504 | */ |
| 2505 | |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 2506 | static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2508 | int type; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2509 | struct dst_entry *dst = skb_dst(skb); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2510 | switch (ipstats_mib_noroutes) { |
| 2511 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 2512 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 2513 | if (type == IPV6_ADDR_ANY) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2514 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2515 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2516 | break; |
| 2517 | } |
| 2518 | /* FALLTHROUGH */ |
| 2519 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2520 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2521 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2522 | break; |
| 2523 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 2524 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | kfree_skb(skb); |
| 2526 | return 0; |
| 2527 | } |
| 2528 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2529 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 2530 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2531 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2532 | } |
| 2533 | |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 2534 | static int ip6_pkt_discard_out(struct net *net, struct sock *sk, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2536 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2537 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | } |
| 2539 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2540 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 2541 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2542 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2543 | } |
| 2544 | |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 2545 | static int ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff *skb) |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2546 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2547 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2548 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2549 | } |
| 2550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | /* |
| 2552 | * Allocate a dst for local (unicast / anycast) address. |
| 2553 | */ |
| 2554 | |
| 2555 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 2556 | const struct in6_addr *addr, |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 2557 | bool anycast) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2559 | u32 tb_id; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2560 | struct net *net = dev_net(idev->dev); |
David Ahern | 5f02ce24 | 2016-09-10 12:09:54 -0700 | [diff] [blame] | 2561 | struct net_device *dev = net->loopback_dev; |
| 2562 | struct rt6_info *rt; |
| 2563 | |
| 2564 | /* use L3 Master device as loopback for host routes if device |
| 2565 | * is enslaved and address is not link local or multicast |
| 2566 | */ |
| 2567 | if (!rt6_need_strict(addr)) |
| 2568 | dev = l3mdev_master_dev_rcu(idev->dev) ? : dev; |
| 2569 | |
| 2570 | rt = ip6_dst_alloc(net, dev, DST_NOCOUNT); |
Hannes Frederic Sowa | a3300ef | 2013-12-07 03:33:45 +0100 | [diff] [blame] | 2571 | if (!rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | return ERR_PTR(-ENOMEM); |
| 2573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | in6_dev_hold(idev); |
| 2575 | |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 2576 | rt->dst.flags |= DST_HOST; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2577 | rt->dst.input = ip6_input; |
| 2578 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | rt->rt6i_idev = idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | |
| 2581 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 2582 | if (anycast) |
| 2583 | rt->rt6i_flags |= RTF_ANYCAST; |
| 2584 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | rt->rt6i_flags |= RTF_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 2587 | rt->rt6i_gateway = *addr; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2588 | rt->rt6i_dst.addr = *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | rt->rt6i_dst.plen = 128; |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2590 | tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL; |
| 2591 | rt->rt6i_table = fib6_get_table(net, tb_id); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 2592 | rt->dst.flags |= DST_NOCACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2594 | atomic_set(&rt->dst.__refcnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | |
| 2596 | return rt; |
| 2597 | } |
| 2598 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2599 | /* remove deleted ip from prefsrc entries */ |
| 2600 | struct arg_dev_net_ip { |
| 2601 | struct net_device *dev; |
| 2602 | struct net *net; |
| 2603 | struct in6_addr *addr; |
| 2604 | }; |
| 2605 | |
| 2606 | static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) |
| 2607 | { |
| 2608 | struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; |
| 2609 | struct net *net = ((struct arg_dev_net_ip *)arg)->net; |
| 2610 | struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; |
| 2611 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2612 | if (((void *)rt->dst.dev == dev || !dev) && |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2613 | rt != net->ipv6.ip6_null_entry && |
| 2614 | ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { |
| 2615 | /* remove prefsrc entry */ |
| 2616 | rt->rt6i_prefsrc.plen = 0; |
| 2617 | } |
| 2618 | return 0; |
| 2619 | } |
| 2620 | |
| 2621 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) |
| 2622 | { |
| 2623 | struct net *net = dev_net(ifp->idev->dev); |
| 2624 | struct arg_dev_net_ip adni = { |
| 2625 | .dev = ifp->idev->dev, |
| 2626 | .net = net, |
| 2627 | .addr = &ifp->addr, |
| 2628 | }; |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2629 | fib6_clean_all(net, fib6_remove_prefsrc, &adni); |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2630 | } |
| 2631 | |
Duan Jiong | be7a010 | 2014-05-15 15:56:14 +0800 | [diff] [blame] | 2632 | #define RTF_RA_ROUTER (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY) |
| 2633 | #define RTF_CACHE_GATEWAY (RTF_GATEWAY | RTF_CACHE) |
| 2634 | |
| 2635 | /* Remove routers and update dst entries when gateway turn into host. */ |
| 2636 | static int fib6_clean_tohost(struct rt6_info *rt, void *arg) |
| 2637 | { |
| 2638 | struct in6_addr *gateway = (struct in6_addr *)arg; |
| 2639 | |
| 2640 | if ((((rt->rt6i_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) || |
| 2641 | ((rt->rt6i_flags & RTF_CACHE_GATEWAY) == RTF_CACHE_GATEWAY)) && |
| 2642 | ipv6_addr_equal(gateway, &rt->rt6i_gateway)) { |
| 2643 | return -1; |
| 2644 | } |
| 2645 | return 0; |
| 2646 | } |
| 2647 | |
| 2648 | void rt6_clean_tohost(struct net *net, struct in6_addr *gateway) |
| 2649 | { |
| 2650 | fib6_clean_all(net, fib6_clean_tohost, gateway); |
| 2651 | } |
| 2652 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2653 | struct arg_dev_net { |
| 2654 | struct net_device *dev; |
| 2655 | struct net *net; |
| 2656 | }; |
| 2657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2658 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 2659 | { |
stephen hemminger | bc3ef66 | 2010-12-16 17:42:40 +0000 | [diff] [blame] | 2660 | const struct arg_dev_net *adn = arg; |
| 2661 | const struct net_device *dev = adn->dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2662 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2663 | if ((rt->dst.dev == dev || !dev) && |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2664 | rt != adn->net->ipv6.ip6_null_entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | return -1; |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | return 0; |
| 2668 | } |
| 2669 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2670 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2672 | struct arg_dev_net adn = { |
| 2673 | .dev = dev, |
| 2674 | .net = net, |
| 2675 | }; |
| 2676 | |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2677 | fib6_clean_all(net, fib6_ifdown, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 2678 | icmp6_clean_all(fib6_ifdown, &adn); |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 2679 | if (dev) |
| 2680 | rt6_uncached_list_flush_dev(net, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | } |
| 2682 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2683 | struct rt6_mtu_change_arg { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | struct net_device *dev; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2685 | unsigned int mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | }; |
| 2687 | |
| 2688 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 2689 | { |
| 2690 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 2691 | struct inet6_dev *idev; |
| 2692 | |
| 2693 | /* In IPv6 pmtu discovery is not optional, |
| 2694 | so that RTAX_MTU lock cannot disable it. |
| 2695 | We still use this lock to block changes |
| 2696 | caused by addrconf/ndisc. |
| 2697 | */ |
| 2698 | |
| 2699 | idev = __in6_dev_get(arg->dev); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2700 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | return 0; |
| 2702 | |
| 2703 | /* For administrative MTU increase, there is no way to discover |
| 2704 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 2705 | Since RFC 1981 doesn't include administrative MTU increase |
| 2706 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 2707 | */ |
| 2708 | /* |
| 2709 | If new MTU is less than route PMTU, this new MTU will be the |
| 2710 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 2711 | decreases; if new MTU is greater than route PMTU, and the |
| 2712 | old MTU is the lowest MTU in the path, update the route PMTU |
| 2713 | to reflect the increase. In this case if the other nodes' MTU |
| 2714 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 2715 | PMTU discouvery. |
| 2716 | */ |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2717 | if (rt->dst.dev == arg->dev && |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 2718 | !dst_metric_locked(&rt->dst, RTAX_MTU)) { |
| 2719 | if (rt->rt6i_flags & RTF_CACHE) { |
| 2720 | /* For RTF_CACHE with rt6i_pmtu == 0 |
| 2721 | * (i.e. a redirected route), |
| 2722 | * the metrics of its rt->dst.from has already |
| 2723 | * been updated. |
| 2724 | */ |
| 2725 | if (rt->rt6i_pmtu && rt->rt6i_pmtu > arg->mtu) |
| 2726 | rt->rt6i_pmtu = arg->mtu; |
| 2727 | } else if (dst_mtu(&rt->dst) >= arg->mtu || |
| 2728 | (dst_mtu(&rt->dst) < arg->mtu && |
| 2729 | dst_mtu(&rt->dst) == idev->cnf.mtu6)) { |
| 2730 | dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu); |
| 2731 | } |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | return 0; |
| 2734 | } |
| 2735 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2736 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2737 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2738 | struct rt6_mtu_change_arg arg = { |
| 2739 | .dev = dev, |
| 2740 | .mtu = mtu, |
| 2741 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2743 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2744 | } |
| 2745 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2746 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2747 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2748 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2749 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2750 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2751 | [RTA_METRICS] = { .type = NLA_NESTED }, |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2752 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2753 | [RTA_PREF] = { .type = NLA_U8 }, |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2754 | [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, |
| 2755 | [RTA_ENCAP] = { .type = NLA_NESTED }, |
Xin Long | 32bc201 | 2015-12-16 17:50:11 +0800 | [diff] [blame] | 2756 | [RTA_EXPIRES] = { .type = NLA_U32 }, |
Lorenzo Colitti | 3b82497 | 2014-03-31 16:23:51 +0900 | [diff] [blame^] | 2757 | [RTA_UID] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2758 | }; |
| 2759 | |
| 2760 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2761 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2763 | struct rtmsg *rtm; |
| 2764 | struct nlattr *tb[RTA_MAX+1]; |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2765 | unsigned int pref; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2766 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2767 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2768 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2769 | if (err < 0) |
| 2770 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2772 | err = -EINVAL; |
| 2773 | rtm = nlmsg_data(nlh); |
| 2774 | memset(cfg, 0, sizeof(*cfg)); |
| 2775 | |
| 2776 | cfg->fc_table = rtm->rtm_table; |
| 2777 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2778 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2779 | cfg->fc_flags = RTF_UP; |
| 2780 | cfg->fc_protocol = rtm->rtm_protocol; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2781 | cfg->fc_type = rtm->rtm_type; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2782 | |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2783 | if (rtm->rtm_type == RTN_UNREACHABLE || |
| 2784 | rtm->rtm_type == RTN_BLACKHOLE || |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 2785 | rtm->rtm_type == RTN_PROHIBIT || |
| 2786 | rtm->rtm_type == RTN_THROW) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2787 | cfg->fc_flags |= RTF_REJECT; |
| 2788 | |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2789 | if (rtm->rtm_type == RTN_LOCAL) |
| 2790 | cfg->fc_flags |= RTF_LOCAL; |
| 2791 | |
Martin KaFai Lau | 1f56a01 | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2792 | if (rtm->rtm_flags & RTM_F_CLONED) |
| 2793 | cfg->fc_flags |= RTF_CACHE; |
| 2794 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2795 | cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2796 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2797 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2798 | |
| 2799 | if (tb[RTA_GATEWAY]) { |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2800 | cfg->fc_gateway = nla_get_in6_addr(tb[RTA_GATEWAY]); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2801 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2803 | |
| 2804 | if (tb[RTA_DST]) { |
| 2805 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2806 | |
| 2807 | if (nla_len(tb[RTA_DST]) < plen) |
| 2808 | goto errout; |
| 2809 | |
| 2810 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2812 | |
| 2813 | if (tb[RTA_SRC]) { |
| 2814 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2815 | |
| 2816 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2817 | goto errout; |
| 2818 | |
| 2819 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2821 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2822 | if (tb[RTA_PREFSRC]) |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2823 | cfg->fc_prefsrc = nla_get_in6_addr(tb[RTA_PREFSRC]); |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2824 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2825 | if (tb[RTA_OIF]) |
| 2826 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2827 | |
| 2828 | if (tb[RTA_PRIORITY]) |
| 2829 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2830 | |
| 2831 | if (tb[RTA_METRICS]) { |
| 2832 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2833 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2835 | |
| 2836 | if (tb[RTA_TABLE]) |
| 2837 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2838 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2839 | if (tb[RTA_MULTIPATH]) { |
| 2840 | cfg->fc_mp = nla_data(tb[RTA_MULTIPATH]); |
| 2841 | cfg->fc_mp_len = nla_len(tb[RTA_MULTIPATH]); |
| 2842 | } |
| 2843 | |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2844 | if (tb[RTA_PREF]) { |
| 2845 | pref = nla_get_u8(tb[RTA_PREF]); |
| 2846 | if (pref != ICMPV6_ROUTER_PREF_LOW && |
| 2847 | pref != ICMPV6_ROUTER_PREF_HIGH) |
| 2848 | pref = ICMPV6_ROUTER_PREF_MEDIUM; |
| 2849 | cfg->fc_flags |= RTF_PREF(pref); |
| 2850 | } |
| 2851 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2852 | if (tb[RTA_ENCAP]) |
| 2853 | cfg->fc_encap = tb[RTA_ENCAP]; |
| 2854 | |
| 2855 | if (tb[RTA_ENCAP_TYPE]) |
| 2856 | cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]); |
| 2857 | |
Xin Long | 32bc201 | 2015-12-16 17:50:11 +0800 | [diff] [blame] | 2858 | if (tb[RTA_EXPIRES]) { |
| 2859 | unsigned long timeout = addrconf_timeout_fixup(nla_get_u32(tb[RTA_EXPIRES]), HZ); |
| 2860 | |
| 2861 | if (addrconf_finite_timeout(timeout)) { |
| 2862 | cfg->fc_expires = jiffies_to_clock_t(timeout * HZ); |
| 2863 | cfg->fc_flags |= RTF_EXPIRES; |
| 2864 | } |
| 2865 | } |
| 2866 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2867 | err = 0; |
| 2868 | errout: |
| 2869 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | } |
| 2871 | |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2872 | struct rt6_nh { |
| 2873 | struct rt6_info *rt6_info; |
| 2874 | struct fib6_config r_cfg; |
| 2875 | struct mx6_config mxc; |
| 2876 | struct list_head next; |
| 2877 | }; |
| 2878 | |
| 2879 | static void ip6_print_replace_route_err(struct list_head *rt6_nh_list) |
| 2880 | { |
| 2881 | struct rt6_nh *nh; |
| 2882 | |
| 2883 | list_for_each_entry(nh, rt6_nh_list, next) { |
| 2884 | pr_warn("IPV6: multipath route replace failed (check consistency of installed routes): %pI6 nexthop %pI6 ifi %d\n", |
| 2885 | &nh->r_cfg.fc_dst, &nh->r_cfg.fc_gateway, |
| 2886 | nh->r_cfg.fc_ifindex); |
| 2887 | } |
| 2888 | } |
| 2889 | |
| 2890 | static int ip6_route_info_append(struct list_head *rt6_nh_list, |
| 2891 | struct rt6_info *rt, struct fib6_config *r_cfg) |
| 2892 | { |
| 2893 | struct rt6_nh *nh; |
| 2894 | struct rt6_info *rtnh; |
| 2895 | int err = -EEXIST; |
| 2896 | |
| 2897 | list_for_each_entry(nh, rt6_nh_list, next) { |
| 2898 | /* check if rt6_info already exists */ |
| 2899 | rtnh = nh->rt6_info; |
| 2900 | |
| 2901 | if (rtnh->dst.dev == rt->dst.dev && |
| 2902 | rtnh->rt6i_idev == rt->rt6i_idev && |
| 2903 | ipv6_addr_equal(&rtnh->rt6i_gateway, |
| 2904 | &rt->rt6i_gateway)) |
| 2905 | return err; |
| 2906 | } |
| 2907 | |
| 2908 | nh = kzalloc(sizeof(*nh), GFP_KERNEL); |
| 2909 | if (!nh) |
| 2910 | return -ENOMEM; |
| 2911 | nh->rt6_info = rt; |
| 2912 | err = ip6_convert_metrics(&nh->mxc, r_cfg); |
| 2913 | if (err) { |
| 2914 | kfree(nh); |
| 2915 | return err; |
| 2916 | } |
| 2917 | memcpy(&nh->r_cfg, r_cfg, sizeof(*r_cfg)); |
| 2918 | list_add_tail(&nh->next, rt6_nh_list); |
| 2919 | |
| 2920 | return 0; |
| 2921 | } |
| 2922 | |
| 2923 | static int ip6_route_multipath_add(struct fib6_config *cfg) |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2924 | { |
| 2925 | struct fib6_config r_cfg; |
| 2926 | struct rtnexthop *rtnh; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2927 | struct rt6_info *rt; |
| 2928 | struct rt6_nh *err_nh; |
| 2929 | struct rt6_nh *nh, *nh_safe; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2930 | int remaining; |
| 2931 | int attrlen; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2932 | int err = 1; |
| 2933 | int nhn = 0; |
| 2934 | int replace = (cfg->fc_nlinfo.nlh && |
| 2935 | (cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_REPLACE)); |
| 2936 | LIST_HEAD(rt6_nh_list); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2937 | |
Michal Kubeček | 35f1b4e | 2015-05-18 20:53:55 +0200 | [diff] [blame] | 2938 | remaining = cfg->fc_mp_len; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2939 | rtnh = (struct rtnexthop *)cfg->fc_mp; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2940 | |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2941 | /* Parse a Multipath Entry and build a list (rt6_nh_list) of |
| 2942 | * rt6_info structs per nexthop |
| 2943 | */ |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2944 | while (rtnh_ok(rtnh, remaining)) { |
| 2945 | memcpy(&r_cfg, cfg, sizeof(*cfg)); |
| 2946 | if (rtnh->rtnh_ifindex) |
| 2947 | r_cfg.fc_ifindex = rtnh->rtnh_ifindex; |
| 2948 | |
| 2949 | attrlen = rtnh_attrlen(rtnh); |
| 2950 | if (attrlen > 0) { |
| 2951 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
| 2952 | |
| 2953 | nla = nla_find(attrs, attrlen, RTA_GATEWAY); |
| 2954 | if (nla) { |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2955 | r_cfg.fc_gateway = nla_get_in6_addr(nla); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2956 | r_cfg.fc_flags |= RTF_GATEWAY; |
| 2957 | } |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2958 | r_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP); |
| 2959 | nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE); |
| 2960 | if (nla) |
| 2961 | r_cfg.fc_encap_type = nla_get_u16(nla); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2962 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2963 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2964 | rt = ip6_route_info_create(&r_cfg); |
| 2965 | if (IS_ERR(rt)) { |
| 2966 | err = PTR_ERR(rt); |
| 2967 | rt = NULL; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2968 | goto cleanup; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2969 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2970 | |
| 2971 | err = ip6_route_info_append(&rt6_nh_list, rt, &r_cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2972 | if (err) { |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2973 | dst_free(&rt->dst); |
| 2974 | goto cleanup; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2975 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2976 | |
| 2977 | rtnh = rtnh_next(rtnh, &remaining); |
| 2978 | } |
| 2979 | |
| 2980 | err_nh = NULL; |
| 2981 | list_for_each_entry(nh, &rt6_nh_list, next) { |
| 2982 | err = __ip6_ins_rt(nh->rt6_info, &cfg->fc_nlinfo, &nh->mxc); |
| 2983 | /* nh->rt6_info is used or freed at this point, reset to NULL*/ |
| 2984 | nh->rt6_info = NULL; |
| 2985 | if (err) { |
| 2986 | if (replace && nhn) |
| 2987 | ip6_print_replace_route_err(&rt6_nh_list); |
| 2988 | err_nh = nh; |
| 2989 | goto add_errout; |
| 2990 | } |
| 2991 | |
Nicolas Dichtel | 1a72418 | 2012-11-01 22:58:22 +0000 | [diff] [blame] | 2992 | /* Because each route is added like a single route we remove |
Michal Kubeček | 2759647 | 2015-05-18 20:54:00 +0200 | [diff] [blame] | 2993 | * these flags after the first nexthop: if there is a collision, |
| 2994 | * we have already failed to add the first nexthop: |
| 2995 | * fib6_add_rt2node() has rejected it; when replacing, old |
| 2996 | * nexthops have been replaced by first new, the rest should |
| 2997 | * be added to it. |
Nicolas Dichtel | 1a72418 | 2012-11-01 22:58:22 +0000 | [diff] [blame] | 2998 | */ |
Michal Kubeček | 2759647 | 2015-05-18 20:54:00 +0200 | [diff] [blame] | 2999 | cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL | |
| 3000 | NLM_F_REPLACE); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3001 | nhn++; |
| 3002 | } |
| 3003 | |
| 3004 | goto cleanup; |
| 3005 | |
| 3006 | add_errout: |
| 3007 | /* Delete routes that were already added */ |
| 3008 | list_for_each_entry(nh, &rt6_nh_list, next) { |
| 3009 | if (err_nh == nh) |
| 3010 | break; |
| 3011 | ip6_route_del(&nh->r_cfg); |
| 3012 | } |
| 3013 | |
| 3014 | cleanup: |
| 3015 | list_for_each_entry_safe(nh, nh_safe, &rt6_nh_list, next) { |
| 3016 | if (nh->rt6_info) |
| 3017 | dst_free(&nh->rt6_info->dst); |
Wu Fengguang | 52fe51f | 2015-09-10 06:57:12 +0800 | [diff] [blame] | 3018 | kfree(nh->mxc.mx); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3019 | list_del(&nh->next); |
| 3020 | kfree(nh); |
| 3021 | } |
| 3022 | |
| 3023 | return err; |
| 3024 | } |
| 3025 | |
| 3026 | static int ip6_route_multipath_del(struct fib6_config *cfg) |
| 3027 | { |
| 3028 | struct fib6_config r_cfg; |
| 3029 | struct rtnexthop *rtnh; |
| 3030 | int remaining; |
| 3031 | int attrlen; |
| 3032 | int err = 1, last_err = 0; |
| 3033 | |
| 3034 | remaining = cfg->fc_mp_len; |
| 3035 | rtnh = (struct rtnexthop *)cfg->fc_mp; |
| 3036 | |
| 3037 | /* Parse a Multipath Entry */ |
| 3038 | while (rtnh_ok(rtnh, remaining)) { |
| 3039 | memcpy(&r_cfg, cfg, sizeof(*cfg)); |
| 3040 | if (rtnh->rtnh_ifindex) |
| 3041 | r_cfg.fc_ifindex = rtnh->rtnh_ifindex; |
| 3042 | |
| 3043 | attrlen = rtnh_attrlen(rtnh); |
| 3044 | if (attrlen > 0) { |
| 3045 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
| 3046 | |
| 3047 | nla = nla_find(attrs, attrlen, RTA_GATEWAY); |
| 3048 | if (nla) { |
| 3049 | nla_memcpy(&r_cfg.fc_gateway, nla, 16); |
| 3050 | r_cfg.fc_flags |= RTF_GATEWAY; |
| 3051 | } |
| 3052 | } |
| 3053 | err = ip6_route_del(&r_cfg); |
| 3054 | if (err) |
| 3055 | last_err = err; |
| 3056 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3057 | rtnh = rtnh_next(rtnh, &remaining); |
| 3058 | } |
| 3059 | |
| 3060 | return last_err; |
| 3061 | } |
| 3062 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3063 | static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3065 | struct fib6_config cfg; |
| 3066 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3067 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3068 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 3069 | if (err < 0) |
| 3070 | return err; |
| 3071 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3072 | if (cfg.fc_mp) |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3073 | return ip6_route_multipath_del(&cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3074 | else |
| 3075 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3076 | } |
| 3077 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3078 | static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3080 | struct fib6_config cfg; |
| 3081 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3083 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 3084 | if (err < 0) |
| 3085 | return err; |
| 3086 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3087 | if (cfg.fc_mp) |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3088 | return ip6_route_multipath_add(&cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3089 | else |
| 3090 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | } |
| 3092 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3093 | static inline size_t rt6_nlmsg_size(struct rt6_info *rt) |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3094 | { |
| 3095 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 3096 | + nla_total_size(16) /* RTA_SRC */ |
| 3097 | + nla_total_size(16) /* RTA_DST */ |
| 3098 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 3099 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 3100 | + nla_total_size(4) /* RTA_TABLE */ |
| 3101 | + nla_total_size(4) /* RTA_IIF */ |
| 3102 | + nla_total_size(4) /* RTA_OIF */ |
| 3103 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 3104 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Daniel Borkmann | ea69763 | 2015-01-05 23:57:47 +0100 | [diff] [blame] | 3105 | + nla_total_size(sizeof(struct rta_cacheinfo)) |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 3106 | + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */ |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3107 | + nla_total_size(1) /* RTA_PREF */ |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 3108 | + lwtunnel_get_encap_size(rt->dst.lwtstate); |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3109 | } |
| 3110 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3111 | static int rt6_fill_node(struct net *net, |
| 3112 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 3113 | struct in6_addr *dst, struct in6_addr *src, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3114 | int iif, int type, u32 portid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3115 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 3117 | u32 metrics[RTAX_MAX]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3118 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3119 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 3120 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3121 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3122 | |
| 3123 | if (prefix) { /* user wants prefix routes only */ |
| 3124 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 3125 | /* success since this is not a prefix route */ |
| 3126 | return 1; |
| 3127 | } |
| 3128 | } |
| 3129 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3130 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*rtm), flags); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3131 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3132 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3133 | |
| 3134 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | rtm->rtm_family = AF_INET6; |
| 3136 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 3137 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 3138 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 3139 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3140 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 3141 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3142 | table = RT6_TABLE_UNSPEC; |
| 3143 | rtm->rtm_table = table; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3144 | if (nla_put_u32(skb, RTA_TABLE, table)) |
| 3145 | goto nla_put_failure; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 3146 | if (rt->rt6i_flags & RTF_REJECT) { |
| 3147 | switch (rt->dst.error) { |
| 3148 | case -EINVAL: |
| 3149 | rtm->rtm_type = RTN_BLACKHOLE; |
| 3150 | break; |
| 3151 | case -EACCES: |
| 3152 | rtm->rtm_type = RTN_PROHIBIT; |
| 3153 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 3154 | case -EAGAIN: |
| 3155 | rtm->rtm_type = RTN_THROW; |
| 3156 | break; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 3157 | default: |
| 3158 | rtm->rtm_type = RTN_UNREACHABLE; |
| 3159 | break; |
| 3160 | } |
| 3161 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3162 | else if (rt->rt6i_flags & RTF_LOCAL) |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 3163 | rtm->rtm_type = RTN_LOCAL; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 3164 | else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | rtm->rtm_type = RTN_LOCAL; |
| 3166 | else |
| 3167 | rtm->rtm_type = RTN_UNICAST; |
| 3168 | rtm->rtm_flags = 0; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 3169 | if (!netif_carrier_ok(rt->dst.dev)) { |
Andy Gospodarek | cea45e2 | 2015-08-13 10:39:00 -0400 | [diff] [blame] | 3170 | rtm->rtm_flags |= RTNH_F_LINKDOWN; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 3171 | if (rt->rt6i_idev->cnf.ignore_routes_with_linkdown) |
| 3172 | rtm->rtm_flags |= RTNH_F_DEAD; |
| 3173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3174 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 3175 | rtm->rtm_protocol = rt->rt6i_protocol; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3176 | if (rt->rt6i_flags & RTF_DYNAMIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3177 | rtm->rtm_protocol = RTPROT_REDIRECT; |
Denis Ovsienko | f0396f60 | 2012-07-10 04:45:50 +0000 | [diff] [blame] | 3178 | else if (rt->rt6i_flags & RTF_ADDRCONF) { |
| 3179 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO)) |
| 3180 | rtm->rtm_protocol = RTPROT_RA; |
| 3181 | else |
| 3182 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 3183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3184 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3185 | if (rt->rt6i_flags & RTF_CACHE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | rtm->rtm_flags |= RTM_F_CLONED; |
| 3187 | |
| 3188 | if (dst) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3189 | if (nla_put_in6_addr(skb, RTA_DST, dst)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3190 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3191 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3192 | } else if (rtm->rtm_dst_len) |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3193 | if (nla_put_in6_addr(skb, RTA_DST, &rt->rt6i_dst.addr)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3194 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3195 | #ifdef CONFIG_IPV6_SUBTREES |
| 3196 | if (src) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3197 | if (nla_put_in6_addr(skb, RTA_SRC, src)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3198 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3199 | rtm->rtm_src_len = 128; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3200 | } else if (rtm->rtm_src_len && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3201 | nla_put_in6_addr(skb, RTA_SRC, &rt->rt6i_src.addr)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3202 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3203 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3204 | if (iif) { |
| 3205 | #ifdef CONFIG_IPV6_MROUTE |
| 3206 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
Nikolay Aleksandrov | 2cf7507 | 2016-09-25 23:08:31 +0200 | [diff] [blame] | 3207 | int err = ip6mr_get_route(net, skb, rtm, nowait, |
| 3208 | portid); |
| 3209 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3210 | if (err <= 0) { |
| 3211 | if (!nowait) { |
| 3212 | if (err == 0) |
| 3213 | return 0; |
| 3214 | goto nla_put_failure; |
| 3215 | } else { |
| 3216 | if (err == -EMSGSIZE) |
| 3217 | goto nla_put_failure; |
| 3218 | } |
| 3219 | } |
| 3220 | } else |
| 3221 | #endif |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3222 | if (nla_put_u32(skb, RTA_IIF, iif)) |
| 3223 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3224 | } else if (dst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | struct in6_addr saddr_buf; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3226 | if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0 && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3227 | nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3228 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3229 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3230 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 3231 | if (rt->rt6i_prefsrc.plen) { |
| 3232 | struct in6_addr saddr_buf; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3233 | saddr_buf = rt->rt6i_prefsrc.addr; |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3234 | if (nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3235 | goto nla_put_failure; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 3236 | } |
| 3237 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 3238 | memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); |
| 3239 | if (rt->rt6i_pmtu) |
| 3240 | metrics[RTAX_MTU - 1] = rt->rt6i_pmtu; |
| 3241 | if (rtnetlink_put_metrics(skb, metrics) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3242 | goto nla_put_failure; |
| 3243 | |
YOSHIFUJI Hideaki / 吉藤英明 | dd0cbf2 | 2013-01-17 12:53:15 +0000 | [diff] [blame] | 3244 | if (rt->rt6i_flags & RTF_GATEWAY) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3245 | if (nla_put_in6_addr(skb, RTA_GATEWAY, &rt->rt6i_gateway) < 0) |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 3246 | goto nla_put_failure; |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 3247 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3248 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3249 | if (rt->dst.dev && |
| 3250 | nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) |
| 3251 | goto nla_put_failure; |
| 3252 | if (nla_put_u32(skb, RTA_PRIORITY, rt->rt6i_metric)) |
| 3253 | goto nla_put_failure; |
Li Wei | 8253947 | 2012-07-29 16:01:30 +0000 | [diff] [blame] | 3254 | |
| 3255 | expires = (rt->rt6i_flags & RTF_EXPIRES) ? rt->dst.expires - jiffies : 0; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 3256 | |
David S. Miller | 87a5069 | 2012-07-10 05:06:14 -0700 | [diff] [blame] | 3257 | if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, rt->dst.error) < 0) |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 3258 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3259 | |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 3260 | if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags))) |
| 3261 | goto nla_put_failure; |
| 3262 | |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 3263 | lwtunnel_fill_encap(skb, rt->dst.lwtstate); |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3264 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3265 | nlmsg_end(skb, nlh); |
| 3266 | return 0; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3267 | |
| 3268 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3269 | nlmsg_cancel(skb, nlh); |
| 3270 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | } |
| 3272 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 3273 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | { |
| 3275 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 3276 | int prefix; |
| 3277 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3278 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 3279 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3280 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 3281 | } else |
| 3282 | prefix = 0; |
| 3283 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3284 | return rt6_fill_node(arg->net, |
| 3285 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3286 | NETLINK_CB(arg->cb->skb).portid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3287 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3288 | } |
| 3289 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3290 | static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3292 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3293 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3295 | struct sk_buff *skb; |
| 3296 | struct rtmsg *rtm; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3297 | struct flowi6 fl6; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3298 | int err, iif = 0, oif = 0; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3299 | |
| 3300 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 3301 | if (err < 0) |
| 3302 | goto errout; |
| 3303 | |
| 3304 | err = -EINVAL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3305 | memset(&fl6, 0, sizeof(fl6)); |
Hannes Frederic Sowa | 38b7097 | 2016-06-11 20:08:19 +0200 | [diff] [blame] | 3306 | rtm = nlmsg_data(nlh); |
| 3307 | fl6.flowlabel = ip6_make_flowinfo(rtm->rtm_tos, 0); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3308 | |
| 3309 | if (tb[RTA_SRC]) { |
| 3310 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 3311 | goto errout; |
| 3312 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3313 | fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3314 | } |
| 3315 | |
| 3316 | if (tb[RTA_DST]) { |
| 3317 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 3318 | goto errout; |
| 3319 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3320 | fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3321 | } |
| 3322 | |
| 3323 | if (tb[RTA_IIF]) |
| 3324 | iif = nla_get_u32(tb[RTA_IIF]); |
| 3325 | |
| 3326 | if (tb[RTA_OIF]) |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3327 | oif = nla_get_u32(tb[RTA_OIF]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3328 | |
Lorenzo Colitti | 2e47b29 | 2014-05-15 16:38:41 -0700 | [diff] [blame] | 3329 | if (tb[RTA_MARK]) |
| 3330 | fl6.flowi6_mark = nla_get_u32(tb[RTA_MARK]); |
| 3331 | |
Lorenzo Colitti | 3b82497 | 2014-03-31 16:23:51 +0900 | [diff] [blame^] | 3332 | if (tb[RTA_UID]) |
| 3333 | fl6.flowi6_uid = make_kuid(current_user_ns(), |
| 3334 | nla_get_u32(tb[RTA_UID])); |
| 3335 | else |
| 3336 | fl6.flowi6_uid = iif ? INVALID_UID : current_uid(); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3337 | if (iif) { |
| 3338 | struct net_device *dev; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3339 | int flags = 0; |
| 3340 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3341 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3342 | if (!dev) { |
| 3343 | err = -ENODEV; |
| 3344 | goto errout; |
| 3345 | } |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3346 | |
| 3347 | fl6.flowi6_iif = iif; |
| 3348 | |
| 3349 | if (!ipv6_addr_any(&fl6.saddr)) |
| 3350 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 3351 | |
| 3352 | rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, |
| 3353 | flags); |
| 3354 | } else { |
| 3355 | fl6.flowi6_oif = oif; |
| 3356 | |
| 3357 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | |
| 3360 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3361 | if (!skb) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 3362 | ip6_rt_put(rt); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3363 | err = -ENOBUFS; |
| 3364 | goto errout; |
| 3365 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | |
| 3367 | /* Reserve room for dummy headers, this skb can pass |
| 3368 | through good chunk of routing engine. |
| 3369 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 3370 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3371 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 3372 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3373 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3374 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3375 | err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3376 | RTM_NEWROUTE, NETLINK_CB(in_skb).portid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3377 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3379 | kfree_skb(skb); |
| 3380 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3381 | } |
| 3382 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3383 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3384 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3385 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | } |
| 3387 | |
Roopa Prabhu | 37a1d36 | 2015-09-13 10:18:33 -0700 | [diff] [blame] | 3388 | void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info, |
| 3389 | unsigned int nlm_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3390 | { |
| 3391 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3392 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 3393 | u32 seq; |
| 3394 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3395 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 3396 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3397 | seq = info->nlh ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3398 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3399 | skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any()); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3400 | if (!skb) |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 3401 | goto errout; |
| 3402 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3403 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
Roopa Prabhu | 37a1d36 | 2015-09-13 10:18:33 -0700 | [diff] [blame] | 3404 | event, info->portid, seq, 0, 0, nlm_flags); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3405 | if (err < 0) { |
| 3406 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 3407 | WARN_ON(err == -EMSGSIZE); |
| 3408 | kfree_skb(skb); |
| 3409 | goto errout; |
| 3410 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3411 | rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE, |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 3412 | info->nlh, gfp_any()); |
| 3413 | return; |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 3414 | errout: |
| 3415 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3416 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | } |
| 3418 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3419 | static int ip6_route_dev_notify(struct notifier_block *this, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3420 | unsigned long event, void *ptr) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3421 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3422 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3423 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3424 | |
| 3425 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3426 | net->ipv6.ip6_null_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3427 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 3428 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3429 | net->ipv6.ip6_prohibit_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3430 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3431 | net->ipv6.ip6_blk_hole_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3432 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 3433 | #endif |
| 3434 | } |
| 3435 | |
| 3436 | return NOTIFY_OK; |
| 3437 | } |
| 3438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3439 | /* |
| 3440 | * /proc |
| 3441 | */ |
| 3442 | |
| 3443 | #ifdef CONFIG_PROC_FS |
| 3444 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 3445 | static const struct file_operations ipv6_route_proc_fops = { |
| 3446 | .owner = THIS_MODULE, |
| 3447 | .open = ipv6_route_open, |
| 3448 | .read = seq_read, |
| 3449 | .llseek = seq_lseek, |
Hannes Frederic Sowa | 8d2ca1d | 2013-09-21 16:55:59 +0200 | [diff] [blame] | 3450 | .release = seq_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 3451 | }; |
| 3452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 3454 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3455 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3456 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3457 | net->ipv6.rt6_stats->fib_nodes, |
| 3458 | net->ipv6.rt6_stats->fib_route_nodes, |
| 3459 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 3460 | net->ipv6.rt6_stats->fib_rt_entries, |
| 3461 | net->ipv6.rt6_stats->fib_rt_cache, |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3462 | dst_entries_get_slow(&net->ipv6.ip6_dst_ops), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3463 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | |
| 3465 | return 0; |
| 3466 | } |
| 3467 | |
| 3468 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 3469 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 3470 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3471 | } |
| 3472 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 3473 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3474 | .owner = THIS_MODULE, |
| 3475 | .open = rt6_stats_seq_open, |
| 3476 | .read = seq_read, |
| 3477 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 3478 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3479 | }; |
| 3480 | #endif /* CONFIG_PROC_FS */ |
| 3481 | |
| 3482 | #ifdef CONFIG_SYSCTL |
| 3483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 3485 | int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3486 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 3487 | { |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3488 | struct net *net; |
| 3489 | int delay; |
| 3490 | if (!write) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3491 | return -EINVAL; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3492 | |
| 3493 | net = (struct net *)ctl->extra1; |
| 3494 | delay = net->ipv6.sysctl.flush_delay; |
| 3495 | proc_dointvec(ctl, write, buffer, lenp, ppos); |
Michal Kubeček | 2ac3ac8 | 2013-08-01 10:04:14 +0200 | [diff] [blame] | 3496 | fib6_run_gc(delay <= 0 ? 0 : (unsigned long)delay, net, delay > 0); |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3497 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3498 | } |
| 3499 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 3500 | struct ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3501 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3502 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3503 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3504 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 3505 | .mode = 0200, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3506 | .proc_handler = ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | }, |
| 3508 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 3510 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3511 | .maxlen = sizeof(int), |
| 3512 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3513 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3514 | }, |
| 3515 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3516 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3517 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3518 | .maxlen = sizeof(int), |
| 3519 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3520 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3521 | }, |
| 3522 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3523 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3524 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3525 | .maxlen = sizeof(int), |
| 3526 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3527 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3528 | }, |
| 3529 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3530 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3531 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3532 | .maxlen = sizeof(int), |
| 3533 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3534 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | }, |
| 3536 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3537 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3538 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3539 | .maxlen = sizeof(int), |
| 3540 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3541 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3542 | }, |
| 3543 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3544 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3545 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | .maxlen = sizeof(int), |
| 3547 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 3548 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3549 | }, |
| 3550 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3551 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3552 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3553 | .maxlen = sizeof(int), |
| 3554 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3555 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3556 | }, |
| 3557 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3559 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3560 | .maxlen = sizeof(int), |
| 3561 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 3562 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | }, |
| 3564 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3565 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3566 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3567 | .maxlen = sizeof(int), |
| 3568 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3569 | .proc_handler = proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3570 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 3571 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | }; |
| 3573 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3574 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 3575 | { |
| 3576 | struct ctl_table *table; |
| 3577 | |
| 3578 | table = kmemdup(ipv6_route_table_template, |
| 3579 | sizeof(ipv6_route_table_template), |
| 3580 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3581 | |
| 3582 | if (table) { |
| 3583 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3584 | table[0].extra1 = net; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 3585 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3586 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 3587 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 3588 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 3589 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 3590 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 3591 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 3592 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
Alexey Dobriyan | 9c69fab | 2009-12-18 20:11:03 -0800 | [diff] [blame] | 3593 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
Eric W. Biederman | 464dc80 | 2012-11-16 03:02:59 +0000 | [diff] [blame] | 3594 | |
| 3595 | /* Don't export sysctls to unprivileged users */ |
| 3596 | if (net->user_ns != &init_user_ns) |
| 3597 | table[0].procname = NULL; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3598 | } |
| 3599 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 3600 | return table; |
| 3601 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3602 | #endif |
| 3603 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3604 | static int __net_init ip6_route_net_init(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3605 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 3606 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3607 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 3608 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
| 3609 | sizeof(net->ipv6.ip6_dst_ops)); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3610 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3611 | if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0) |
| 3612 | goto out_ip6_dst_ops; |
| 3613 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3614 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 3615 | sizeof(*net->ipv6.ip6_null_entry), |
| 3616 | GFP_KERNEL); |
| 3617 | if (!net->ipv6.ip6_null_entry) |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3618 | goto out_ip6_dst_entries; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3619 | net->ipv6.ip6_null_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3620 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3621 | net->ipv6.ip6_null_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 3622 | dst_init_metrics(&net->ipv6.ip6_null_entry->dst, |
| 3623 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3624 | |
| 3625 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3626 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 3627 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 3628 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3629 | if (!net->ipv6.ip6_prohibit_entry) |
| 3630 | goto out_ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3631 | net->ipv6.ip6_prohibit_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3632 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3633 | net->ipv6.ip6_prohibit_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 3634 | dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst, |
| 3635 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3636 | |
| 3637 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 3638 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 3639 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3640 | if (!net->ipv6.ip6_blk_hole_entry) |
| 3641 | goto out_ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3642 | net->ipv6.ip6_blk_hole_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3643 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3644 | net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 3645 | dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst, |
| 3646 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3647 | #endif |
| 3648 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 3649 | net->ipv6.sysctl.flush_delay = 0; |
| 3650 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 3651 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 3652 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 3653 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 3654 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 3655 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 3656 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 3657 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 3658 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 3659 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3660 | ret = 0; |
| 3661 | out: |
| 3662 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3663 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3664 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3665 | out_ip6_prohibit_entry: |
| 3666 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3667 | out_ip6_null_entry: |
| 3668 | kfree(net->ipv6.ip6_null_entry); |
| 3669 | #endif |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3670 | out_ip6_dst_entries: |
| 3671 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3672 | out_ip6_dst_ops: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3673 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3674 | } |
| 3675 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3676 | static void __net_exit ip6_route_net_exit(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3677 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3678 | kfree(net->ipv6.ip6_null_entry); |
| 3679 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3680 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3681 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 3682 | #endif |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3683 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3684 | } |
| 3685 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3686 | static int __net_init ip6_route_net_init_late(struct net *net) |
| 3687 | { |
| 3688 | #ifdef CONFIG_PROC_FS |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 3689 | proc_create("ipv6_route", 0, net->proc_net, &ipv6_route_proc_fops); |
| 3690 | proc_create("rt6_stats", S_IRUGO, net->proc_net, &rt6_stats_seq_fops); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3691 | #endif |
| 3692 | return 0; |
| 3693 | } |
| 3694 | |
| 3695 | static void __net_exit ip6_route_net_exit_late(struct net *net) |
| 3696 | { |
| 3697 | #ifdef CONFIG_PROC_FS |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 3698 | remove_proc_entry("ipv6_route", net->proc_net); |
| 3699 | remove_proc_entry("rt6_stats", net->proc_net); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3700 | #endif |
| 3701 | } |
| 3702 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3703 | static struct pernet_operations ip6_route_net_ops = { |
| 3704 | .init = ip6_route_net_init, |
| 3705 | .exit = ip6_route_net_exit, |
| 3706 | }; |
| 3707 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3708 | static int __net_init ipv6_inetpeer_init(struct net *net) |
| 3709 | { |
| 3710 | struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL); |
| 3711 | |
| 3712 | if (!bp) |
| 3713 | return -ENOMEM; |
| 3714 | inet_peer_base_init(bp); |
| 3715 | net->ipv6.peers = bp; |
| 3716 | return 0; |
| 3717 | } |
| 3718 | |
| 3719 | static void __net_exit ipv6_inetpeer_exit(struct net *net) |
| 3720 | { |
| 3721 | struct inet_peer_base *bp = net->ipv6.peers; |
| 3722 | |
| 3723 | net->ipv6.peers = NULL; |
David S. Miller | 56a6b24 | 2012-06-09 16:32:41 -0700 | [diff] [blame] | 3724 | inetpeer_invalidate_tree(bp); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3725 | kfree(bp); |
| 3726 | } |
| 3727 | |
David S. Miller | 2b823f7 | 2012-06-09 19:00:16 -0700 | [diff] [blame] | 3728 | static struct pernet_operations ipv6_inetpeer_ops = { |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3729 | .init = ipv6_inetpeer_init, |
| 3730 | .exit = ipv6_inetpeer_exit, |
| 3731 | }; |
| 3732 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3733 | static struct pernet_operations ip6_route_net_late_ops = { |
| 3734 | .init = ip6_route_net_init_late, |
| 3735 | .exit = ip6_route_net_exit_late, |
| 3736 | }; |
| 3737 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3738 | static struct notifier_block ip6_route_dev_notifier = { |
| 3739 | .notifier_call = ip6_route_dev_notify, |
| 3740 | .priority = 0, |
| 3741 | }; |
| 3742 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3743 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3744 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3745 | int ret; |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 3746 | int cpu; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3747 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 3748 | ret = -ENOMEM; |
| 3749 | ip6_dst_ops_template.kmem_cachep = |
| 3750 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 3751 | SLAB_HWCACHE_ALIGN, NULL); |
| 3752 | if (!ip6_dst_ops_template.kmem_cachep) |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 3753 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 3754 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3755 | ret = dst_entries_init(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3756 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3757 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3758 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3759 | ret = register_pernet_subsys(&ipv6_inetpeer_ops); |
| 3760 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3761 | goto out_dst_entries; |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3762 | |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3763 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 3764 | if (ret) |
| 3765 | goto out_register_inetpeer; |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3766 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 3767 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 3768 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3769 | /* Registering of the loopback is done before this portion of code, |
| 3770 | * the loopback reference in rt6_info will not be taken, do it |
| 3771 | * manually for init_net */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3772 | init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3773 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3774 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3775 | init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3776 | init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3777 | init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3778 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3779 | #endif |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3780 | ret = fib6_init(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3781 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3782 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3783 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3784 | ret = xfrm6_init(); |
| 3785 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3786 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 3787 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3788 | ret = fib6_rules_init(); |
| 3789 | if (ret) |
| 3790 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 3791 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3792 | ret = register_pernet_subsys(&ip6_route_net_late_ops); |
| 3793 | if (ret) |
| 3794 | goto fib6_rules_init; |
| 3795 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3796 | ret = -ENOBUFS; |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 3797 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) || |
| 3798 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) || |
| 3799 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL)) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3800 | goto out_register_late_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3801 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3802 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3803 | if (ret) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3804 | goto out_register_late_subsys; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3805 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 3806 | for_each_possible_cpu(cpu) { |
| 3807 | struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu); |
| 3808 | |
| 3809 | INIT_LIST_HEAD(&ul->head); |
| 3810 | spin_lock_init(&ul->lock); |
| 3811 | } |
| 3812 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3813 | out: |
| 3814 | return ret; |
| 3815 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3816 | out_register_late_subsys: |
| 3817 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3818 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3819 | fib6_rules_cleanup(); |
| 3820 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3821 | xfrm6_fini(); |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3822 | out_fib6_init: |
| 3823 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3824 | out_register_subsys: |
| 3825 | unregister_pernet_subsys(&ip6_route_net_ops); |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3826 | out_register_inetpeer: |
| 3827 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3828 | out_dst_entries: |
| 3829 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3830 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3831 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3832 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3833 | } |
| 3834 | |
| 3835 | void ip6_route_cleanup(void) |
| 3836 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3837 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3838 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 3839 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3841 | fib6_gc_cleanup(); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3842 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3843 | unregister_pernet_subsys(&ip6_route_net_ops); |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3844 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3845 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | } |