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 |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 103 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 104 | const struct in6_addr *prefix, int prefixlen, |
| 105 | const struct in6_addr *gwaddr, int ifindex, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 106 | unsigned int pref); |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 107 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 108 | const struct in6_addr *prefix, int prefixlen, |
| 109 | const struct in6_addr *gwaddr, int ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 110 | #endif |
| 111 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 112 | struct uncached_list { |
| 113 | spinlock_t lock; |
| 114 | struct list_head head; |
| 115 | }; |
| 116 | |
| 117 | static DEFINE_PER_CPU_ALIGNED(struct uncached_list, rt6_uncached_list); |
| 118 | |
| 119 | static void rt6_uncached_list_add(struct rt6_info *rt) |
| 120 | { |
| 121 | struct uncached_list *ul = raw_cpu_ptr(&rt6_uncached_list); |
| 122 | |
| 123 | rt->dst.flags |= DST_NOCACHE; |
| 124 | rt->rt6i_uncached_list = ul; |
| 125 | |
| 126 | spin_lock_bh(&ul->lock); |
| 127 | list_add_tail(&rt->rt6i_uncached, &ul->head); |
| 128 | spin_unlock_bh(&ul->lock); |
| 129 | } |
| 130 | |
| 131 | static void rt6_uncached_list_del(struct rt6_info *rt) |
| 132 | { |
| 133 | if (!list_empty(&rt->rt6i_uncached)) { |
| 134 | struct uncached_list *ul = rt->rt6i_uncached_list; |
| 135 | |
| 136 | spin_lock_bh(&ul->lock); |
| 137 | list_del(&rt->rt6i_uncached); |
| 138 | spin_unlock_bh(&ul->lock); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev) |
| 143 | { |
| 144 | struct net_device *loopback_dev = net->loopback_dev; |
| 145 | int cpu; |
| 146 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 147 | if (dev == loopback_dev) |
| 148 | return; |
| 149 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 150 | for_each_possible_cpu(cpu) { |
| 151 | struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu); |
| 152 | struct rt6_info *rt; |
| 153 | |
| 154 | spin_lock_bh(&ul->lock); |
| 155 | list_for_each_entry(rt, &ul->head, rt6i_uncached) { |
| 156 | struct inet6_dev *rt_idev = rt->rt6i_idev; |
| 157 | struct net_device *rt_dev = rt->dst.dev; |
| 158 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 159 | if (rt_idev->dev == dev) { |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 160 | rt->rt6i_idev = in6_dev_get(loopback_dev); |
| 161 | in6_dev_put(rt_idev); |
| 162 | } |
| 163 | |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 164 | if (rt_dev == dev) { |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 165 | rt->dst.dev = loopback_dev; |
| 166 | dev_hold(rt->dst.dev); |
| 167 | dev_put(rt_dev); |
| 168 | } |
| 169 | } |
| 170 | spin_unlock_bh(&ul->lock); |
| 171 | } |
| 172 | } |
| 173 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 174 | static u32 *rt6_pcpu_cow_metrics(struct rt6_info *rt) |
| 175 | { |
| 176 | return dst_metrics_write_ptr(rt->dst.from); |
| 177 | } |
| 178 | |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 179 | static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) |
| 180 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 181 | struct rt6_info *rt = (struct rt6_info *)dst; |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 182 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 183 | if (rt->rt6i_flags & RTF_PCPU) |
| 184 | return rt6_pcpu_cow_metrics(rt); |
| 185 | else if (rt->rt6i_flags & RTF_CACHE) |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 186 | return NULL; |
| 187 | else |
Martin KaFai Lau | 3b47117 | 2015-02-12 16:14:08 -0800 | [diff] [blame] | 188 | return dst_cow_metrics_generic(dst, old); |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 189 | } |
| 190 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 191 | static inline const void *choose_neigh_daddr(struct rt6_info *rt, |
| 192 | struct sk_buff *skb, |
| 193 | const void *daddr) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 194 | { |
| 195 | struct in6_addr *p = &rt->rt6i_gateway; |
| 196 | |
David S. Miller | a7563f3 | 2012-01-26 16:29:16 -0500 | [diff] [blame] | 197 | if (!ipv6_addr_any(p)) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 198 | return (const void *) p; |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 199 | else if (skb) |
| 200 | return &ipv6_hdr(skb)->daddr; |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 201 | return daddr; |
| 202 | } |
| 203 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 204 | static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, |
| 205 | struct sk_buff *skb, |
| 206 | const void *daddr) |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 207 | { |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 208 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 209 | struct neighbour *n; |
| 210 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 211 | daddr = choose_neigh_daddr(rt, skb, daddr); |
YOSHIFUJI Hideaki / 吉藤英明 | 8e022ee | 2013-01-17 12:53:09 +0000 | [diff] [blame] | 212 | n = __ipv6_neigh_lookup(dst->dev, daddr); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 213 | if (n) |
| 214 | return n; |
| 215 | return neigh_create(&nd_tbl, daddr, dst->dev); |
| 216 | } |
| 217 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 218 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | .family = AF_INET6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | .gc = ip6_dst_gc, |
| 221 | .gc_thresh = 1024, |
| 222 | .check = ip6_dst_check, |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 223 | .default_advmss = ip6_default_advmss, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 224 | .mtu = ip6_mtu, |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 225 | .cow_metrics = ipv6_cow_metrics, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | .destroy = ip6_dst_destroy, |
| 227 | .ifdown = ip6_dst_ifdown, |
| 228 | .negative_advice = ip6_negative_advice, |
| 229 | .link_failure = ip6_link_failure, |
| 230 | .update_pmtu = ip6_rt_update_pmtu, |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 231 | .redirect = rt6_do_redirect, |
Eric W. Biederman | 9f8955c | 2015-10-07 16:48:39 -0500 | [diff] [blame] | 232 | .local_out = __ip6_local_out, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 233 | .neigh_lookup = ip6_neigh_lookup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | }; |
| 235 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 236 | static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst) |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 237 | { |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 238 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 239 | |
| 240 | return mtu ? : dst->dev->mtu; |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 241 | } |
| 242 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 243 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 244 | struct sk_buff *skb, u32 mtu) |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 245 | { |
| 246 | } |
| 247 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 248 | static void ip6_rt_blackhole_redirect(struct dst_entry *dst, struct sock *sk, |
| 249 | struct sk_buff *skb) |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 250 | { |
| 251 | } |
| 252 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 253 | static struct dst_ops ip6_dst_blackhole_ops = { |
| 254 | .family = AF_INET6, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 255 | .destroy = ip6_dst_destroy, |
| 256 | .check = ip6_dst_check, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 257 | .mtu = ip6_blackhole_mtu, |
Eric Dumazet | 214f45c | 2011-02-18 11:39:01 -0800 | [diff] [blame] | 258 | .default_advmss = ip6_default_advmss, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 259 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 260 | .redirect = ip6_rt_blackhole_redirect, |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 261 | .cow_metrics = dst_cow_metrics_generic, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 262 | .neigh_lookup = ip6_neigh_lookup, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 263 | }; |
| 264 | |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 265 | static const u32 ip6_template_metrics[RTAX_MAX] = { |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 266 | [RTAX_HOPLIMIT - 1] = 0, |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 267 | }; |
| 268 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 269 | static const struct rt6_info ip6_null_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 270 | .dst = { |
| 271 | .__refcnt = ATOMIC_INIT(1), |
| 272 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 273 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 274 | .error = -ENETUNREACH, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 275 | .input = ip6_pkt_discard, |
| 276 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | }, |
| 278 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 279 | .rt6i_protocol = RTPROT_KERNEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | .rt6i_metric = ~(u32) 0, |
| 281 | .rt6i_ref = ATOMIC_INIT(1), |
| 282 | }; |
| 283 | |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 284 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 285 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 286 | static const struct rt6_info ip6_prohibit_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 287 | .dst = { |
| 288 | .__refcnt = ATOMIC_INIT(1), |
| 289 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 290 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 291 | .error = -EACCES, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 292 | .input = ip6_pkt_prohibit, |
| 293 | .output = ip6_pkt_prohibit_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 294 | }, |
| 295 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 296 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 297 | .rt6i_metric = ~(u32) 0, |
| 298 | .rt6i_ref = ATOMIC_INIT(1), |
| 299 | }; |
| 300 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 301 | static const struct rt6_info ip6_blk_hole_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 302 | .dst = { |
| 303 | .__refcnt = ATOMIC_INIT(1), |
| 304 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 305 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 306 | .error = -EINVAL, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 307 | .input = dst_discard, |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 308 | .output = dst_discard_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 309 | }, |
| 310 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 311 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 312 | .rt6i_metric = ~(u32) 0, |
| 313 | .rt6i_ref = ATOMIC_INIT(1), |
| 314 | }; |
| 315 | |
| 316 | #endif |
| 317 | |
Martin KaFai Lau | ebfa45f | 2015-10-15 16:39:57 -0700 | [diff] [blame] | 318 | static void rt6_info_init(struct rt6_info *rt) |
| 319 | { |
| 320 | struct dst_entry *dst = &rt->dst; |
| 321 | |
| 322 | memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst)); |
| 323 | INIT_LIST_HEAD(&rt->rt6i_siblings); |
| 324 | INIT_LIST_HEAD(&rt->rt6i_uncached); |
| 325 | } |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | /* allocate dst with ip6_dst_ops */ |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 328 | static struct rt6_info *__ip6_dst_alloc(struct net *net, |
| 329 | struct net_device *dev, |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 330 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 332 | struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev, |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 333 | 0, DST_OBSOLETE_FORCE_CHK, flags); |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 334 | |
Martin KaFai Lau | ebfa45f | 2015-10-15 16:39:57 -0700 | [diff] [blame] | 335 | if (rt) |
| 336 | rt6_info_init(rt); |
Steffen Klassert | 8104891 | 2012-07-05 23:37:09 +0000 | [diff] [blame] | 337 | |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 338 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 341 | static struct rt6_info *ip6_dst_alloc(struct net *net, |
| 342 | struct net_device *dev, |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 343 | int flags) |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 344 | { |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 345 | struct rt6_info *rt = __ip6_dst_alloc(net, dev, flags); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 346 | |
| 347 | if (rt) { |
| 348 | rt->rt6i_pcpu = alloc_percpu_gfp(struct rt6_info *, GFP_ATOMIC); |
| 349 | if (rt->rt6i_pcpu) { |
| 350 | int cpu; |
| 351 | |
| 352 | for_each_possible_cpu(cpu) { |
| 353 | struct rt6_info **p; |
| 354 | |
| 355 | p = per_cpu_ptr(rt->rt6i_pcpu, cpu); |
| 356 | /* no one shares rt */ |
| 357 | *p = NULL; |
| 358 | } |
| 359 | } else { |
| 360 | dst_destroy((struct dst_entry *)rt); |
| 361 | return NULL; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | return rt; |
| 366 | } |
| 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 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 759 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 760 | struct route_info *rinfo = (struct route_info *) opt; |
| 761 | struct in6_addr prefix_buf, *prefix; |
| 762 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 763 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 764 | struct rt6_info *rt; |
| 765 | |
| 766 | if (len < sizeof(struct route_info)) { |
| 767 | return -EINVAL; |
| 768 | } |
| 769 | |
| 770 | /* Sanity check for prefix_len and length */ |
| 771 | if (rinfo->length > 3) { |
| 772 | return -EINVAL; |
| 773 | } else if (rinfo->prefix_len > 128) { |
| 774 | return -EINVAL; |
| 775 | } else if (rinfo->prefix_len > 64) { |
| 776 | if (rinfo->length < 2) { |
| 777 | return -EINVAL; |
| 778 | } |
| 779 | } else if (rinfo->prefix_len > 0) { |
| 780 | if (rinfo->length < 1) { |
| 781 | return -EINVAL; |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | pref = rinfo->route_pref; |
| 786 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
Jens Rosenboom | 3933fc9 | 2009-09-10 06:25:11 +0000 | [diff] [blame] | 787 | return -EINVAL; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 788 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 789 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 790 | |
| 791 | if (rinfo->length == 3) |
| 792 | prefix = (struct in6_addr *)rinfo->prefix; |
| 793 | else { |
| 794 | /* this function is safe */ |
| 795 | ipv6_addr_prefix(&prefix_buf, |
| 796 | (struct in6_addr *)rinfo->prefix, |
| 797 | rinfo->prefix_len); |
| 798 | prefix = &prefix_buf; |
| 799 | } |
| 800 | |
Duan Jiong | f104a56 | 2013-11-08 09:56:53 +0800 | [diff] [blame] | 801 | if (rinfo->prefix_len == 0) |
| 802 | rt = rt6_get_dflt_router(gwaddr, dev); |
| 803 | else |
| 804 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, |
| 805 | gwaddr, dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 806 | |
| 807 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 808 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 809 | rt = NULL; |
| 810 | } |
| 811 | |
| 812 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 813 | rt = rt6_add_route_info(net, prefix, rinfo->prefix_len, gwaddr, dev->ifindex, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 814 | pref); |
| 815 | else if (rt) |
| 816 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 817 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 818 | |
| 819 | if (rt) { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 820 | if (!addrconf_finite_timeout(lifetime)) |
| 821 | rt6_clean_expires(rt); |
| 822 | else |
| 823 | rt6_set_expires(rt, jiffies + HZ * lifetime); |
| 824 | |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 825 | ip6_rt_put(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 826 | } |
| 827 | return 0; |
| 828 | } |
| 829 | #endif |
| 830 | |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 831 | static struct fib6_node* fib6_backtrack(struct fib6_node *fn, |
| 832 | struct in6_addr *saddr) |
| 833 | { |
| 834 | struct fib6_node *pn; |
| 835 | while (1) { |
| 836 | if (fn->fn_flags & RTN_TL_ROOT) |
| 837 | return NULL; |
| 838 | pn = fn->parent; |
| 839 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) |
| 840 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); |
| 841 | else |
| 842 | fn = pn; |
| 843 | if (fn->fn_flags & RTN_RTINFO) |
| 844 | return fn; |
| 845 | } |
| 846 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 847 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 848 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 849 | struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 850 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | { |
| 852 | struct fib6_node *fn; |
| 853 | struct rt6_info *rt; |
| 854 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 855 | read_lock_bh(&table->tb6_lock); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 856 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 857 | restart: |
| 858 | rt = fn->leaf; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 859 | rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 860 | if (rt->rt6i_nsiblings && fl6->flowi6_oif == 0) |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 861 | rt = rt6_multipath_select(rt, fl6, fl6->flowi6_oif, flags); |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 862 | if (rt == net->ipv6.ip6_null_entry) { |
| 863 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 864 | if (fn) |
| 865 | goto restart; |
| 866 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 867 | dst_use(&rt->dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 868 | read_unlock_bh(&table->tb6_lock); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 869 | |
| 870 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
| 871 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 872 | return rt; |
| 873 | |
| 874 | } |
| 875 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 876 | struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
Florian Westphal | ea6e574 | 2011-09-05 16:05:44 +0200 | [diff] [blame] | 877 | int flags) |
| 878 | { |
| 879 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup); |
| 880 | } |
| 881 | EXPORT_SYMBOL_GPL(ip6_route_lookup); |
| 882 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 883 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 884 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 885 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 886 | struct flowi6 fl6 = { |
| 887 | .flowi6_oif = oif, |
| 888 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 889 | }; |
| 890 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 891 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 892 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 893 | if (saddr) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 894 | memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 895 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 896 | } |
| 897 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 898 | dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 899 | if (dst->error == 0) |
| 900 | return (struct rt6_info *) dst; |
| 901 | |
| 902 | dst_release(dst); |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | return NULL; |
| 905 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 906 | EXPORT_SYMBOL(rt6_lookup); |
| 907 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 908 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | It takes new route entry, the addition fails by any reason the |
| 910 | route is freed. In any case, if caller does not hold it, it may |
| 911 | be destroyed. |
| 912 | */ |
| 913 | |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 914 | 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] | 915 | struct mx6_config *mxc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
| 917 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 918 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 920 | table = rt->rt6i_table; |
| 921 | write_lock_bh(&table->tb6_lock); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 922 | err = fib6_add(&table->tb6_root, rt, info, mxc); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 923 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
| 925 | return err; |
| 926 | } |
| 927 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 928 | int ip6_ins_rt(struct rt6_info *rt) |
| 929 | { |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 930 | struct nl_info info = { .nl_net = dev_net(rt->dst.dev), }; |
| 931 | struct mx6_config mxc = { .mx = NULL, }; |
| 932 | |
| 933 | return __ip6_ins_rt(rt, &info, &mxc); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 934 | } |
| 935 | |
Martin KaFai Lau | 8b9df26 | 2015-05-22 20:55:59 -0700 | [diff] [blame] | 936 | static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort, |
| 937 | const struct in6_addr *daddr, |
| 938 | const struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | struct rt6_info *rt; |
| 941 | |
| 942 | /* |
| 943 | * Clone the route. |
| 944 | */ |
| 945 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 946 | if (ort->rt6i_flags & (RTF_CACHE | RTF_PCPU)) |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 947 | ort = (struct rt6_info *)ort->dst.from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 949 | 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] | 950 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 951 | if (!rt) |
| 952 | return NULL; |
| 953 | |
| 954 | ip6_rt_copy_init(rt, ort); |
| 955 | rt->rt6i_flags |= RTF_CACHE; |
| 956 | rt->rt6i_metric = 0; |
| 957 | rt->dst.flags |= DST_HOST; |
| 958 | rt->rt6i_dst.addr = *daddr; |
| 959 | rt->rt6i_dst.plen = 128; |
| 960 | |
| 961 | if (!rt6_is_gw_or_nonexthop(ort)) { |
| 962 | if (ort->rt6i_dst.plen != 128 && |
| 963 | ipv6_addr_equal(&ort->rt6i_dst.addr, daddr)) |
| 964 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | #ifdef CONFIG_IPV6_SUBTREES |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 966 | if (rt->rt6i_src.plen && saddr) { |
| 967 | rt->rt6i_src.addr = *saddr; |
| 968 | rt->rt6i_src.plen = 128; |
Martin KaFai Lau | 8b9df26 | 2015-05-22 20:55:59 -0700 | [diff] [blame] | 969 | } |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 970 | #endif |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 971 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 973 | return rt; |
| 974 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 976 | static struct rt6_info *ip6_rt_pcpu_alloc(struct rt6_info *rt) |
| 977 | { |
| 978 | struct rt6_info *pcpu_rt; |
| 979 | |
| 980 | pcpu_rt = __ip6_dst_alloc(dev_net(rt->dst.dev), |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 981 | rt->dst.dev, rt->dst.flags); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 982 | |
| 983 | if (!pcpu_rt) |
| 984 | return NULL; |
| 985 | ip6_rt_copy_init(pcpu_rt, rt); |
| 986 | pcpu_rt->rt6i_protocol = rt->rt6i_protocol; |
| 987 | pcpu_rt->rt6i_flags |= RTF_PCPU; |
| 988 | return pcpu_rt; |
| 989 | } |
| 990 | |
| 991 | /* It should be called with read_lock_bh(&tb6_lock) acquired */ |
| 992 | static struct rt6_info *rt6_get_pcpu_route(struct rt6_info *rt) |
| 993 | { |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 994 | struct rt6_info *pcpu_rt, **p; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 995 | |
| 996 | p = this_cpu_ptr(rt->rt6i_pcpu); |
| 997 | pcpu_rt = *p; |
| 998 | |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 999 | if (pcpu_rt) { |
| 1000 | dst_hold(&pcpu_rt->dst); |
| 1001 | rt6_dst_from_metrics_check(pcpu_rt); |
| 1002 | } |
| 1003 | return pcpu_rt; |
| 1004 | } |
| 1005 | |
| 1006 | static struct rt6_info *rt6_make_pcpu_route(struct rt6_info *rt) |
| 1007 | { |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1008 | struct fib6_table *table = rt->rt6i_table; |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 1009 | struct rt6_info *pcpu_rt, *prev, **p; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1010 | |
| 1011 | pcpu_rt = ip6_rt_pcpu_alloc(rt); |
| 1012 | if (!pcpu_rt) { |
| 1013 | struct net *net = dev_net(rt->dst.dev); |
| 1014 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1015 | dst_hold(&net->ipv6.ip6_null_entry->dst); |
| 1016 | return net->ipv6.ip6_null_entry; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1019 | read_lock_bh(&table->tb6_lock); |
| 1020 | if (rt->rt6i_pcpu) { |
| 1021 | p = this_cpu_ptr(rt->rt6i_pcpu); |
| 1022 | prev = cmpxchg(p, NULL, pcpu_rt); |
| 1023 | if (prev) { |
| 1024 | /* If someone did it before us, return prev instead */ |
| 1025 | dst_destroy(&pcpu_rt->dst); |
| 1026 | pcpu_rt = prev; |
| 1027 | } |
| 1028 | } else { |
| 1029 | /* rt has been removed from the fib6 tree |
| 1030 | * before we have a chance to acquire the read_lock. |
| 1031 | * In this case, don't brother to create a pcpu rt |
| 1032 | * since rt is going away anyway. The next |
| 1033 | * dst_check() will trigger a re-lookup. |
| 1034 | */ |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1035 | dst_destroy(&pcpu_rt->dst); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1036 | pcpu_rt = rt; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1037 | } |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1038 | dst_hold(&pcpu_rt->dst); |
| 1039 | rt6_dst_from_metrics_check(pcpu_rt); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1040 | read_unlock_bh(&table->tb6_lock); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1041 | return pcpu_rt; |
| 1042 | } |
| 1043 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1044 | static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1045 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | { |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1047 | struct fib6_node *fn, *saved_fn; |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1048 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1049 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 1051 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1052 | if (net->ipv6.devconf_all->forwarding == 0) |
| 1053 | strict |= RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1055 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1057 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1058 | saved_fn = fn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1060 | if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF) |
| 1061 | oif = 0; |
| 1062 | |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1063 | redo_rt6_select: |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1064 | rt = rt6_select(fn, oif, strict); |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 1065 | if (rt->rt6i_nsiblings) |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1066 | rt = rt6_multipath_select(rt, fl6, oif, strict); |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1067 | if (rt == net->ipv6.ip6_null_entry) { |
| 1068 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 1069 | if (fn) |
| 1070 | goto redo_rt6_select; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1071 | else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 1072 | /* also consider unreachable route */ |
| 1073 | strict &= ~RT6_LOOKUP_F_REACHABLE; |
| 1074 | fn = saved_fn; |
| 1075 | goto redo_rt6_select; |
Martin KaFai Lau | 367efcb | 2014-10-20 13:42:45 -0700 | [diff] [blame] | 1076 | } |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1077 | } |
| 1078 | |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 1079 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1080 | 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] | 1081 | dst_use(&rt->dst, jiffies); |
| 1082 | read_unlock_bh(&table->tb6_lock); |
| 1083 | |
| 1084 | rt6_dst_from_metrics_check(rt); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1085 | |
| 1086 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1087 | return rt; |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1088 | } else if (unlikely((fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH) && |
| 1089 | !(rt->rt6i_flags & RTF_GATEWAY))) { |
| 1090 | /* Create a RTF_CACHE clone which will not be |
| 1091 | * owned by the fib6 tree. It is for the special case where |
| 1092 | * the daddr in the skb during the neighbor look-up is different |
| 1093 | * from the fl6->daddr used to look-up route here. |
| 1094 | */ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1095 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1096 | struct rt6_info *uncached_rt; |
| 1097 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1098 | dst_use(&rt->dst, jiffies); |
| 1099 | read_unlock_bh(&table->tb6_lock); |
| 1100 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1101 | uncached_rt = ip6_rt_cache_alloc(rt, &fl6->daddr, NULL); |
| 1102 | dst_release(&rt->dst); |
| 1103 | |
| 1104 | if (uncached_rt) |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 1105 | rt6_uncached_list_add(uncached_rt); |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1106 | else |
| 1107 | uncached_rt = net->ipv6.ip6_null_entry; |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1108 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1109 | dst_hold(&uncached_rt->dst); |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1110 | |
| 1111 | trace_fib6_table_lookup(net, uncached_rt, table->tb6_id, fl6); |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1112 | return uncached_rt; |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1113 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1114 | } else { |
| 1115 | /* Get a percpu copy */ |
| 1116 | |
| 1117 | struct rt6_info *pcpu_rt; |
| 1118 | |
| 1119 | rt->dst.lastuse = jiffies; |
| 1120 | rt->dst.__use++; |
| 1121 | pcpu_rt = rt6_get_pcpu_route(rt); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1122 | |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1123 | if (pcpu_rt) { |
| 1124 | read_unlock_bh(&table->tb6_lock); |
| 1125 | } else { |
| 1126 | /* We have to do the read_unlock first |
| 1127 | * because rt6_make_pcpu_route() may trigger |
| 1128 | * ip6_dst_gc() which will take the write_lock. |
| 1129 | */ |
| 1130 | dst_hold(&rt->dst); |
| 1131 | read_unlock_bh(&table->tb6_lock); |
Martin KaFai Lau | a73e419 | 2015-08-14 11:05:53 -0700 | [diff] [blame] | 1132 | pcpu_rt = rt6_make_pcpu_route(rt); |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1133 | dst_release(&rt->dst); |
| 1134 | } |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1135 | |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1136 | trace_fib6_table_lookup(net, pcpu_rt, table->tb6_id, fl6); |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1137 | return pcpu_rt; |
Martin KaFai Lau | 9c7370a | 2015-08-14 11:05:54 -0700 | [diff] [blame] | 1138 | |
Martin KaFai Lau | d52d399 | 2015-05-22 20:56:06 -0700 | [diff] [blame] | 1139 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1142 | 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] | 1143 | struct flowi6 *fl6, int flags) |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 1144 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1145 | return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 1146 | } |
| 1147 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1148 | static struct dst_entry *ip6_route_input_lookup(struct net *net, |
| 1149 | struct net_device *dev, |
| 1150 | struct flowi6 *fl6, int flags) |
| 1151 | { |
| 1152 | if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) |
| 1153 | flags |= RT6_LOOKUP_F_IFACE; |
| 1154 | |
| 1155 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); |
| 1156 | } |
| 1157 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1158 | void ip6_route_input(struct sk_buff *skb) |
| 1159 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1160 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1161 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1162 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1163 | struct ip_tunnel_info *tun_info; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1164 | struct flowi6 fl6 = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1165 | .flowi6_iif = l3mdev_fib_oif(skb->dev), |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1166 | .daddr = iph->daddr, |
| 1167 | .saddr = iph->saddr, |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1168 | .flowlabel = ip6_flowinfo(iph), |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1169 | .flowi6_mark = skb->mark, |
| 1170 | .flowi6_proto = iph->nexthdr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1171 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1172 | |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1173 | tun_info = skb_tunnel_info(skb); |
Jiri Benc | 46fa062 | 2015-08-28 20:48:19 +0200 | [diff] [blame] | 1174 | if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) |
Jiri Benc | 904af04 | 2015-08-20 13:56:31 +0200 | [diff] [blame] | 1175 | fl6.flowi6_tun_key.tun_id = tun_info->key.tun_id; |
Jiri Benc | 06e9d04 | 2015-08-20 13:56:26 +0200 | [diff] [blame] | 1176 | skb_dst_drop(skb); |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1177 | 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] | 1178 | } |
| 1179 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1180 | 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] | 1181 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1182 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1183 | return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1184 | } |
| 1185 | |
Paolo Abeni | 6f21c96 | 2016-01-29 12:30:19 +0100 | [diff] [blame] | 1186 | struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, |
| 1187 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1188 | { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1189 | struct dst_entry *dst; |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1190 | bool any_src; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1191 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 1192 | dst = l3mdev_rt6_dst_by_oif(net, fl6); |
| 1193 | if (dst) |
| 1194 | return dst; |
| 1195 | |
Pavel Emelyanov | 1fb9489 | 2012-08-08 21:53:36 +0000 | [diff] [blame] | 1196 | fl6->flowi6_iif = LOOPBACK_IFINDEX; |
David McCullough | 4dc27d1c | 2012-06-25 15:42:26 +0000 | [diff] [blame] | 1197 | |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1198 | any_src = ipv6_addr_any(&fl6->saddr); |
David Ahern | 741a11d | 2015-09-28 10:12:13 -0700 | [diff] [blame] | 1199 | if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr) || |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1200 | (fl6->flowi6_oif && any_src)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 1201 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1202 | |
David Ahern | d46a9d6 | 2015-10-21 08:42:22 -0700 | [diff] [blame] | 1203 | if (!any_src) |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1204 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki / 吉藤英明 | 0c9a2ac | 2010-03-07 00:14:44 +0000 | [diff] [blame] | 1205 | else if (sk) |
| 1206 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1207 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1208 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
Paolo Abeni | 6f21c96 | 2016-01-29 12:30:19 +0100 | [diff] [blame] | 1210 | EXPORT_SYMBOL_GPL(ip6_route_output_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 1212 | 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] | 1213 | { |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 1214 | struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1215 | struct dst_entry *new = NULL; |
| 1216 | |
David S. Miller | f5b0a87 | 2012-07-19 12:31:33 -0700 | [diff] [blame] | 1217 | 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] | 1218 | if (rt) { |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1219 | rt6_info_init(rt); |
| 1220 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1221 | new = &rt->dst; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1222 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 1223 | new->input = dst_discard; |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1224 | new->output = dst_discard_out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1225 | |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1226 | dst_copy_metrics(new, &ort->dst); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1227 | rt->rt6i_idev = ort->rt6i_idev; |
| 1228 | if (rt->rt6i_idev) |
| 1229 | in6_dev_hold(rt->rt6i_idev); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1230 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1231 | rt->rt6i_gateway = ort->rt6i_gateway; |
Martin KaFai Lau | 0a1f596 | 2015-10-15 16:39:58 -0700 | [diff] [blame] | 1232 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_PCPU; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1233 | rt->rt6i_metric = 0; |
| 1234 | |
| 1235 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1236 | #ifdef CONFIG_IPV6_SUBTREES |
| 1237 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1238 | #endif |
| 1239 | |
| 1240 | dst_free(new); |
| 1241 | } |
| 1242 | |
David S. Miller | 69ead7a | 2011-03-01 14:45:33 -0800 | [diff] [blame] | 1243 | dst_release(dst_orig); |
| 1244 | return new ? new : ERR_PTR(-ENOMEM); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1245 | } |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | /* |
| 1248 | * Destination cache support functions |
| 1249 | */ |
| 1250 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1251 | static void rt6_dst_from_metrics_check(struct rt6_info *rt) |
| 1252 | { |
| 1253 | if (rt->dst.from && |
| 1254 | dst_metrics_ptr(&rt->dst) != dst_metrics_ptr(rt->dst.from)) |
| 1255 | dst_init_metrics(&rt->dst, dst_metrics_ptr(rt->dst.from), true); |
| 1256 | } |
| 1257 | |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1258 | static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie) |
| 1259 | { |
| 1260 | if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie)) |
| 1261 | return NULL; |
| 1262 | |
| 1263 | if (rt6_check_expired(rt)) |
| 1264 | return NULL; |
| 1265 | |
| 1266 | return &rt->dst; |
| 1267 | } |
| 1268 | |
| 1269 | static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie) |
| 1270 | { |
Martin KaFai Lau | 5973fb1 | 2015-11-11 11:51:07 -0800 | [diff] [blame] | 1271 | if (!__rt6_check_expired(rt) && |
| 1272 | rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1273 | rt6_check((struct rt6_info *)(rt->dst.from), cookie)) |
| 1274 | return &rt->dst; |
| 1275 | else |
| 1276 | return NULL; |
| 1277 | } |
| 1278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 1280 | { |
| 1281 | struct rt6_info *rt; |
| 1282 | |
| 1283 | rt = (struct rt6_info *) dst; |
| 1284 | |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 1285 | /* All IPV6 dsts are created with ->obsolete set to the value |
| 1286 | * DST_OBSOLETE_FORCE_CHK which forces validation calls down |
| 1287 | * into this function always. |
| 1288 | */ |
Hannes Frederic Sowa | e3bc10b | 2013-10-24 07:48:24 +0200 | [diff] [blame] | 1289 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1290 | rt6_dst_from_metrics_check(rt); |
| 1291 | |
Martin KaFai Lau | 02bcf4e | 2015-11-11 11:51:08 -0800 | [diff] [blame] | 1292 | if (rt->rt6i_flags & RTF_PCPU || |
| 1293 | (unlikely(dst->flags & DST_NOCACHE) && rt->dst.from)) |
Martin KaFai Lau | 3da59bd | 2015-05-22 20:56:03 -0700 | [diff] [blame] | 1294 | return rt6_dst_from_check(rt, cookie); |
| 1295 | else |
| 1296 | return rt6_check(rt, cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | } |
| 1298 | |
| 1299 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 1300 | { |
| 1301 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1302 | |
| 1303 | if (rt) { |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1304 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1305 | if (rt6_check_expired(rt)) { |
| 1306 | ip6_del_rt(rt); |
| 1307 | dst = NULL; |
| 1308 | } |
| 1309 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | dst_release(dst); |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1311 | dst = NULL; |
| 1312 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1314 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | } |
| 1316 | |
| 1317 | static void ip6_link_failure(struct sk_buff *skb) |
| 1318 | { |
| 1319 | struct rt6_info *rt; |
| 1320 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1321 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1323 | rt = (struct rt6_info *) skb_dst(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | if (rt) { |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1325 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1326 | dst_hold(&rt->dst); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 1327 | ip6_del_rt(rt); |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1328 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | rt->rt6i_node->fn_sernum = -1; |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | } |
| 1332 | } |
| 1333 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1334 | static void rt6_do_update_pmtu(struct rt6_info *rt, u32 mtu) |
| 1335 | { |
| 1336 | struct net *net = dev_net(rt->dst.dev); |
| 1337 | |
| 1338 | rt->rt6i_flags |= RTF_MODIFIED; |
| 1339 | rt->rt6i_pmtu = mtu; |
| 1340 | rt6_update_expires(rt, net->ipv6.sysctl.ip6_rt_mtu_expires); |
| 1341 | } |
| 1342 | |
Martin KaFai Lau | 0d3f6d2 | 2015-11-11 11:51:06 -0800 | [diff] [blame] | 1343 | static bool rt6_cache_allowed_for_pmtu(const struct rt6_info *rt) |
| 1344 | { |
| 1345 | return !(rt->rt6i_flags & RTF_CACHE) && |
| 1346 | (rt->rt6i_flags & RTF_PCPU || rt->rt6i_node); |
| 1347 | } |
| 1348 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1349 | static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk, |
| 1350 | const struct ipv6hdr *iph, u32 mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | { |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 1352 | struct rt6_info *rt6 = (struct rt6_info *)dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1354 | if (rt6->rt6i_flags & RTF_LOCAL) |
| 1355 | return; |
| 1356 | |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1357 | dst_confirm(dst); |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1358 | mtu = max_t(u32, mtu, IPV6_MIN_MTU); |
| 1359 | if (mtu >= dst_mtu(dst)) |
| 1360 | return; |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1361 | |
Martin KaFai Lau | 0d3f6d2 | 2015-11-11 11:51:06 -0800 | [diff] [blame] | 1362 | if (!rt6_cache_allowed_for_pmtu(rt6)) { |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1363 | rt6_do_update_pmtu(rt6, mtu); |
| 1364 | } else { |
| 1365 | const struct in6_addr *daddr, *saddr; |
| 1366 | struct rt6_info *nrt6; |
Hagen Paul Pfeifer | 9d28971 | 2015-01-15 22:34:25 +0100 | [diff] [blame] | 1367 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1368 | if (iph) { |
| 1369 | daddr = &iph->daddr; |
| 1370 | saddr = &iph->saddr; |
| 1371 | } else if (sk) { |
| 1372 | daddr = &sk->sk_v6_daddr; |
| 1373 | saddr = &inet6_sk(sk)->saddr; |
| 1374 | } else { |
| 1375 | return; |
| 1376 | } |
| 1377 | nrt6 = ip6_rt_cache_alloc(rt6, daddr, saddr); |
| 1378 | if (nrt6) { |
| 1379 | rt6_do_update_pmtu(nrt6, mtu); |
| 1380 | |
| 1381 | /* ip6_ins_rt(nrt6) will bump the |
| 1382 | * rt6->rt6i_node->fn_sernum |
| 1383 | * which will fail the next rt6_check() and |
| 1384 | * invalidate the sk->sk_dst_cache. |
| 1385 | */ |
| 1386 | ip6_ins_rt(nrt6); |
| 1387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | } |
| 1389 | } |
| 1390 | |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1391 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 1392 | struct sk_buff *skb, u32 mtu) |
| 1393 | { |
| 1394 | __ip6_rt_update_pmtu(dst, sk, skb ? ipv6_hdr(skb) : NULL, mtu); |
| 1395 | } |
| 1396 | |
David S. Miller | 42ae66c | 2012-06-15 20:01:57 -0700 | [diff] [blame] | 1397 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, |
| 1398 | int oif, u32 mark) |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1399 | { |
| 1400 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1401 | struct dst_entry *dst; |
| 1402 | struct flowi6 fl6; |
| 1403 | |
| 1404 | memset(&fl6, 0, sizeof(fl6)); |
| 1405 | fl6.flowi6_oif = oif; |
Lorenzo Colitti | 1b3c61d | 2014-05-13 10:17:34 -0700 | [diff] [blame] | 1406 | fl6.flowi6_mark = mark ? mark : IP6_REPLY_MARK(net, skb->mark); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1407 | fl6.daddr = iph->daddr; |
| 1408 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1409 | fl6.flowlabel = ip6_flowinfo(iph); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1410 | |
| 1411 | dst = ip6_route_output(net, NULL, &fl6); |
| 1412 | if (!dst->error) |
Martin KaFai Lau | 45e4fd2 | 2015-05-22 20:56:00 -0700 | [diff] [blame] | 1413 | __ip6_rt_update_pmtu(dst, NULL, iph, ntohl(mtu)); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1414 | dst_release(dst); |
| 1415 | } |
| 1416 | EXPORT_SYMBOL_GPL(ip6_update_pmtu); |
| 1417 | |
| 1418 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu) |
| 1419 | { |
| 1420 | ip6_update_pmtu(skb, sock_net(sk), mtu, |
| 1421 | sk->sk_bound_dev_if, sk->sk_mark); |
| 1422 | } |
| 1423 | EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu); |
| 1424 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1425 | /* Handle redirects */ |
| 1426 | struct ip6rd_flowi { |
| 1427 | struct flowi6 fl6; |
| 1428 | struct in6_addr gateway; |
| 1429 | }; |
| 1430 | |
| 1431 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1432 | struct fib6_table *table, |
| 1433 | struct flowi6 *fl6, |
| 1434 | int flags) |
| 1435 | { |
| 1436 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6; |
| 1437 | struct rt6_info *rt; |
| 1438 | struct fib6_node *fn; |
| 1439 | |
| 1440 | /* Get the "current" route for this destination and |
| 1441 | * check if the redirect has come from approriate router. |
| 1442 | * |
| 1443 | * RFC 4861 specifies that redirects should only be |
| 1444 | * accepted if they come from the nexthop to the target. |
| 1445 | * Due to the way the routes are chosen, this notion |
| 1446 | * is a bit fuzzy and one might need to check all possible |
| 1447 | * routes. |
| 1448 | */ |
| 1449 | |
| 1450 | read_lock_bh(&table->tb6_lock); |
| 1451 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
| 1452 | restart: |
| 1453 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
| 1454 | if (rt6_check_expired(rt)) |
| 1455 | continue; |
| 1456 | if (rt->dst.error) |
| 1457 | break; |
| 1458 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1459 | continue; |
| 1460 | if (fl6->flowi6_oif != rt->dst.dev->ifindex) |
| 1461 | continue; |
| 1462 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
| 1463 | continue; |
| 1464 | break; |
| 1465 | } |
| 1466 | |
| 1467 | if (!rt) |
| 1468 | rt = net->ipv6.ip6_null_entry; |
| 1469 | else if (rt->dst.error) { |
| 1470 | rt = net->ipv6.ip6_null_entry; |
Martin KaFai Lau | b0a1ba5 | 2015-01-20 19:16:02 -0800 | [diff] [blame] | 1471 | goto out; |
| 1472 | } |
| 1473 | |
| 1474 | if (rt == net->ipv6.ip6_null_entry) { |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1475 | fn = fib6_backtrack(fn, &fl6->saddr); |
| 1476 | if (fn) |
| 1477 | goto restart; |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1478 | } |
Martin KaFai Lau | a3c00e4 | 2014-10-20 13:42:43 -0700 | [diff] [blame] | 1479 | |
Martin KaFai Lau | b0a1ba5 | 2015-01-20 19:16:02 -0800 | [diff] [blame] | 1480 | out: |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1481 | dst_hold(&rt->dst); |
| 1482 | |
| 1483 | read_unlock_bh(&table->tb6_lock); |
| 1484 | |
David Ahern | b811580 | 2015-11-19 12:24:22 -0800 | [diff] [blame] | 1485 | trace_fib6_table_lookup(net, rt, table->tb6_id, fl6); |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1486 | return rt; |
| 1487 | }; |
| 1488 | |
| 1489 | static struct dst_entry *ip6_route_redirect(struct net *net, |
| 1490 | const struct flowi6 *fl6, |
| 1491 | const struct in6_addr *gateway) |
| 1492 | { |
| 1493 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
| 1494 | struct ip6rd_flowi rdfl; |
| 1495 | |
| 1496 | rdfl.fl6 = *fl6; |
| 1497 | rdfl.gateway = *gateway; |
| 1498 | |
| 1499 | return fib6_rule_lookup(net, &rdfl.fl6, |
| 1500 | flags, __ip6_route_redirect); |
| 1501 | } |
| 1502 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1503 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark) |
| 1504 | { |
| 1505 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1506 | struct dst_entry *dst; |
| 1507 | struct flowi6 fl6; |
| 1508 | |
| 1509 | memset(&fl6, 0, sizeof(fl6)); |
Julian Anastasov | e374c61 | 2014-04-28 10:51:56 +0300 | [diff] [blame] | 1510 | fl6.flowi6_iif = LOOPBACK_IFINDEX; |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1511 | fl6.flowi6_oif = oif; |
| 1512 | fl6.flowi6_mark = mark; |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1513 | fl6.daddr = iph->daddr; |
| 1514 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1515 | fl6.flowlabel = ip6_flowinfo(iph); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1516 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1517 | dst = ip6_route_redirect(net, &fl6, &ipv6_hdr(skb)->saddr); |
| 1518 | rt6_do_redirect(dst, NULL, skb); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1519 | dst_release(dst); |
| 1520 | } |
| 1521 | EXPORT_SYMBOL_GPL(ip6_redirect); |
| 1522 | |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1523 | void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, |
| 1524 | u32 mark) |
| 1525 | { |
| 1526 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
| 1527 | const struct rd_msg *msg = (struct rd_msg *)icmp6_hdr(skb); |
| 1528 | struct dst_entry *dst; |
| 1529 | struct flowi6 fl6; |
| 1530 | |
| 1531 | memset(&fl6, 0, sizeof(fl6)); |
Julian Anastasov | e374c61 | 2014-04-28 10:51:56 +0300 | [diff] [blame] | 1532 | fl6.flowi6_iif = LOOPBACK_IFINDEX; |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1533 | fl6.flowi6_oif = oif; |
| 1534 | fl6.flowi6_mark = mark; |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1535 | fl6.daddr = msg->dest; |
| 1536 | fl6.saddr = iph->daddr; |
| 1537 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1538 | dst = ip6_route_redirect(net, &fl6, &iph->saddr); |
| 1539 | rt6_do_redirect(dst, NULL, skb); |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1540 | dst_release(dst); |
| 1541 | } |
| 1542 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1543 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk) |
| 1544 | { |
| 1545 | ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark); |
| 1546 | } |
| 1547 | EXPORT_SYMBOL_GPL(ip6_sk_redirect); |
| 1548 | |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1549 | static unsigned int ip6_default_advmss(const struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | { |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1551 | struct net_device *dev = dst->dev; |
| 1552 | unsigned int mtu = dst_mtu(dst); |
| 1553 | struct net *net = dev_net(dev); |
| 1554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 1556 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1557 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 1558 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | |
| 1560 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1561 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 1562 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 1563 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | * rely only on pmtu discovery" |
| 1565 | */ |
| 1566 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 1567 | mtu = IPV6_MAXPLEN; |
| 1568 | return mtu; |
| 1569 | } |
| 1570 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 1571 | static unsigned int ip6_mtu(const struct dst_entry *dst) |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1572 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1573 | const struct rt6_info *rt = (const struct rt6_info *)dst; |
| 1574 | unsigned int mtu = rt->rt6i_pmtu; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1575 | struct inet6_dev *idev; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1576 | |
| 1577 | if (mtu) |
Eric Dumazet | 30f78d8 | 2014-04-10 21:23:36 -0700 | [diff] [blame] | 1578 | goto out; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1579 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 1580 | mtu = dst_metric_raw(dst, RTAX_MTU); |
| 1581 | if (mtu) |
| 1582 | goto out; |
| 1583 | |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1584 | mtu = IPV6_MIN_MTU; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1585 | |
| 1586 | rcu_read_lock(); |
| 1587 | idev = __in6_dev_get(dst->dev); |
| 1588 | if (idev) |
| 1589 | mtu = idev->cnf.mtu6; |
| 1590 | rcu_read_unlock(); |
| 1591 | |
Eric Dumazet | 30f78d8 | 2014-04-10 21:23:36 -0700 | [diff] [blame] | 1592 | out: |
| 1593 | return min_t(unsigned int, mtu, IP6_MAX_MTU); |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1594 | } |
| 1595 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1596 | static struct dst_entry *icmp6_dst_gc_list; |
| 1597 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1598 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1599 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1600 | struct flowi6 *fl6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | { |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1602 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | struct rt6_info *rt; |
| 1604 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1605 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1607 | if (unlikely(!idev)) |
Eric Dumazet | 122bdf6 | 2012-03-14 21:13:11 +0000 | [diff] [blame] | 1608 | return ERR_PTR(-ENODEV); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 1610 | rt = ip6_dst_alloc(net, dev, 0); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1611 | if (unlikely(!rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | in6_dev_put(idev); |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1613 | dst = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | goto out; |
| 1615 | } |
| 1616 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1617 | rt->dst.flags |= DST_HOST; |
| 1618 | rt->dst.output = ip6_output; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1619 | atomic_set(&rt->dst.__refcnt, 1); |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 1620 | rt->rt6i_gateway = fl6->daddr; |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1621 | rt->rt6i_dst.addr = fl6->daddr; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1622 | rt->rt6i_dst.plen = 128; |
| 1623 | rt->rt6i_idev = idev; |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 1624 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1626 | spin_lock_bh(&icmp6_dst_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1627 | rt->dst.next = icmp6_dst_gc_list; |
| 1628 | icmp6_dst_gc_list = &rt->dst; |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1629 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1631 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1633 | dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0); |
| 1634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | out: |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1636 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | } |
| 1638 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1639 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | { |
Hagen Paul Pfeifer | e9476e95 | 2011-02-25 05:45:19 +0000 | [diff] [blame] | 1641 | struct dst_entry *dst, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1642 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1644 | spin_lock_bh(&icmp6_dst_lock); |
| 1645 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | while ((dst = *pprev) != NULL) { |
| 1648 | if (!atomic_read(&dst->__refcnt)) { |
| 1649 | *pprev = dst->next; |
| 1650 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | } else { |
| 1652 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1653 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | } |
| 1655 | } |
| 1656 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1657 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1658 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1659 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | } |
| 1661 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1662 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1663 | void *arg) |
| 1664 | { |
| 1665 | struct dst_entry *dst, **pprev; |
| 1666 | |
| 1667 | spin_lock_bh(&icmp6_dst_lock); |
| 1668 | pprev = &icmp6_dst_gc_list; |
| 1669 | while ((dst = *pprev) != NULL) { |
| 1670 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1671 | if (func(rt, arg)) { |
| 1672 | *pprev = dst->next; |
| 1673 | dst_free(dst); |
| 1674 | } else { |
| 1675 | pprev = &dst->next; |
| 1676 | } |
| 1677 | } |
| 1678 | spin_unlock_bh(&icmp6_dst_lock); |
| 1679 | } |
| 1680 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1681 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | { |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1683 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1684 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1685 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1686 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1687 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1688 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1689 | int entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1691 | entries = dst_entries_get_fast(ops); |
Michal Kubeček | 49a18d8 | 2013-08-01 10:04:24 +0200 | [diff] [blame] | 1692 | if (time_after(rt_last_gc + rt_min_interval, jiffies) && |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1693 | entries <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | goto out; |
| 1695 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1696 | net->ipv6.ip6_rt_gc_expire++; |
Li RongQing | 1495664 | 2014-05-19 17:30:28 +0800 | [diff] [blame] | 1697 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net, true); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1698 | entries = dst_entries_get_slow(ops); |
| 1699 | if (entries < ops->gc_thresh) |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1700 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1702 | 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] | 1703 | return entries > rt_max_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | } |
| 1705 | |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1706 | static int ip6_convert_metrics(struct mx6_config *mxc, |
| 1707 | const struct fib6_config *cfg) |
| 1708 | { |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1709 | bool ecn_ca = false; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1710 | struct nlattr *nla; |
| 1711 | int remaining; |
| 1712 | u32 *mp; |
| 1713 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1714 | if (!cfg->fc_mx) |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1715 | return 0; |
| 1716 | |
| 1717 | mp = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL); |
| 1718 | if (unlikely(!mp)) |
| 1719 | return -ENOMEM; |
| 1720 | |
| 1721 | nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) { |
| 1722 | int type = nla_type(nla); |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1723 | u32 val; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1724 | |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1725 | if (!type) |
| 1726 | continue; |
| 1727 | if (unlikely(type > RTAX_MAX)) |
| 1728 | goto err; |
Daniel Borkmann | ea69763 | 2015-01-05 23:57:47 +0100 | [diff] [blame] | 1729 | |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1730 | if (type == RTAX_CC_ALGO) { |
| 1731 | char tmp[TCP_CA_NAME_MAX]; |
| 1732 | |
| 1733 | nla_strlcpy(tmp, nla, sizeof(tmp)); |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1734 | val = tcp_ca_get_key_by_name(tmp, &ecn_ca); |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1735 | if (val == TCP_CA_UNSPEC) |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1736 | goto err; |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1737 | } else { |
| 1738 | val = nla_get_u32(nla); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1739 | } |
Daniel Borkmann | b8d3e41 | 2015-08-31 15:58:46 +0200 | [diff] [blame] | 1740 | if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK)) |
| 1741 | goto err; |
Daniel Borkmann | 1bb1480 | 2015-08-31 15:58:45 +0200 | [diff] [blame] | 1742 | |
| 1743 | mp[type - 1] = val; |
| 1744 | __set_bit(type - 1, mxc->mx_valid); |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1745 | } |
| 1746 | |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1747 | if (ecn_ca) { |
| 1748 | __set_bit(RTAX_FEATURES - 1, mxc->mx_valid); |
| 1749 | mp[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA; |
| 1750 | } |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1751 | |
Daniel Borkmann | c3a8d94 | 2015-08-31 15:58:47 +0200 | [diff] [blame] | 1752 | mxc->mx = mp; |
Florian Westphal | e715b6d | 2015-01-05 23:57:44 +0100 | [diff] [blame] | 1753 | return 0; |
| 1754 | err: |
| 1755 | kfree(mp); |
| 1756 | return -EINVAL; |
| 1757 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1759 | static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | { |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1761 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | struct rt6_info *rt = NULL; |
| 1763 | struct net_device *dev = NULL; |
| 1764 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1765 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | int addr_type; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1767 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1769 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1770 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1772 | if (cfg->fc_src_len) |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1773 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1775 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1777 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | if (!dev) |
| 1779 | goto out; |
| 1780 | idev = in6_dev_get(dev); |
| 1781 | if (!idev) |
| 1782 | goto out; |
| 1783 | } |
| 1784 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1785 | if (cfg->fc_metric == 0) |
| 1786 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1788 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1789 | if (cfg->fc_nlinfo.nlh && |
| 1790 | !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) { |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1791 | table = fib6_get_table(net, cfg->fc_table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1792 | if (!table) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1793 | 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] | 1794 | table = fib6_new_table(net, cfg->fc_table); |
| 1795 | } |
| 1796 | } else { |
| 1797 | table = fib6_new_table(net, cfg->fc_table); |
| 1798 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1799 | |
| 1800 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1801 | goto out; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1802 | |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 1803 | rt = ip6_dst_alloc(net, NULL, |
| 1804 | (cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1806 | if (!rt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | err = -ENOMEM; |
| 1808 | goto out; |
| 1809 | } |
| 1810 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1811 | if (cfg->fc_flags & RTF_EXPIRES) |
| 1812 | rt6_set_expires(rt, jiffies + |
| 1813 | clock_t_to_jiffies(cfg->fc_expires)); |
| 1814 | else |
| 1815 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1817 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1818 | cfg->fc_protocol = RTPROT_BOOT; |
| 1819 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1820 | |
| 1821 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | |
| 1823 | if (addr_type & IPV6_ADDR_MULTICAST) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1824 | rt->dst.input = ip6_mc_input; |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 1825 | else if (cfg->fc_flags & RTF_LOCAL) |
| 1826 | rt->dst.input = ip6_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | else |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1828 | rt->dst.input = ip6_forward; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1830 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1832 | if (cfg->fc_encap) { |
| 1833 | struct lwtunnel_state *lwtstate; |
| 1834 | |
| 1835 | err = lwtunnel_build_state(dev, cfg->fc_encap_type, |
Tom Herbert | 127eb7c | 2015-08-24 09:45:41 -0700 | [diff] [blame] | 1836 | cfg->fc_encap, AF_INET6, cfg, |
| 1837 | &lwtstate); |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1838 | if (err) |
| 1839 | goto out; |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 1840 | rt->dst.lwtstate = lwtstate_get(lwtstate); |
| 1841 | if (lwtunnel_output_redirect(rt->dst.lwtstate)) { |
| 1842 | rt->dst.lwtstate->orig_output = rt->dst.output; |
| 1843 | rt->dst.output = lwtunnel_output; |
Tom Herbert | 2536862 | 2015-08-17 13:42:24 -0700 | [diff] [blame] | 1844 | } |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 1845 | if (lwtunnel_input_redirect(rt->dst.lwtstate)) { |
| 1846 | rt->dst.lwtstate->orig_input = rt->dst.input; |
| 1847 | rt->dst.input = lwtunnel_input; |
Tom Herbert | 2536862 | 2015-08-17 13:42:24 -0700 | [diff] [blame] | 1848 | } |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 1849 | } |
| 1850 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1851 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1852 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Martin KaFai Lau | afc4eef | 2015-04-28 13:03:07 -0700 | [diff] [blame] | 1853 | if (rt->rt6i_dst.plen == 128) |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 1854 | rt->dst.flags |= DST_HOST; |
Michal Kubeček | e5fd387 | 2014-03-27 13:04:08 +0100 | [diff] [blame] | 1855 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1857 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1858 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | #endif |
| 1860 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1861 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | |
| 1863 | /* We cannot add true routes via loopback here, |
| 1864 | they would result in kernel looping; promote them to reject routes |
| 1865 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1866 | if ((cfg->fc_flags & RTF_REJECT) || |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1867 | (dev && (dev->flags & IFF_LOOPBACK) && |
| 1868 | !(addr_type & IPV6_ADDR_LOOPBACK) && |
| 1869 | !(cfg->fc_flags & RTF_LOCAL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1871 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | if (dev) { |
| 1873 | dev_put(dev); |
| 1874 | in6_dev_put(idev); |
| 1875 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1876 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | dev_hold(dev); |
| 1878 | idev = in6_dev_get(dev); |
| 1879 | if (!idev) { |
| 1880 | err = -ENODEV; |
| 1881 | goto out; |
| 1882 | } |
| 1883 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1885 | switch (cfg->fc_type) { |
| 1886 | case RTN_BLACKHOLE: |
| 1887 | rt->dst.error = -EINVAL; |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1888 | rt->dst.output = dst_discard_out; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1889 | rt->dst.input = dst_discard; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1890 | break; |
| 1891 | case RTN_PROHIBIT: |
| 1892 | rt->dst.error = -EACCES; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1893 | rt->dst.output = ip6_pkt_prohibit_out; |
| 1894 | rt->dst.input = ip6_pkt_prohibit; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1895 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 1896 | case RTN_THROW: |
Nikola Forró | 0315e38 | 2015-09-17 16:01:32 +0200 | [diff] [blame] | 1897 | case RTN_UNREACHABLE: |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1898 | default: |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1899 | rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN |
Nikola Forró | 0315e38 | 2015-09-17 16:01:32 +0200 | [diff] [blame] | 1900 | : (cfg->fc_type == RTN_UNREACHABLE) |
| 1901 | ? -EHOSTUNREACH : -ENETUNREACH; |
Kamala R | 7150aed | 2013-12-02 19:55:21 +0530 | [diff] [blame] | 1902 | rt->dst.output = ip6_pkt_discard_out; |
| 1903 | rt->dst.input = ip6_pkt_discard; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1904 | break; |
| 1905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | goto install_route; |
| 1907 | } |
| 1908 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1909 | if (cfg->fc_flags & RTF_GATEWAY) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1910 | const struct in6_addr *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | int gwa_type; |
| 1912 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1913 | gw_addr = &cfg->fc_gateway; |
Florian Westphal | 330567b | 2015-08-07 10:54:28 +0200 | [diff] [blame] | 1914 | gwa_type = ipv6_addr_type(gw_addr); |
Florian Westphal | 48ed7b2 | 2015-05-21 00:25:41 +0200 | [diff] [blame] | 1915 | |
| 1916 | /* if gw_addr is local we will fail to detect this in case |
| 1917 | * address is still TENTATIVE (DAD in progress). rt6_lookup() |
| 1918 | * will return already-added prefix route via interface that |
| 1919 | * prefix route was assigned to, which might be non-loopback. |
| 1920 | */ |
| 1921 | err = -EINVAL; |
Florian Westphal | 330567b | 2015-08-07 10:54:28 +0200 | [diff] [blame] | 1922 | if (ipv6_chk_addr_and_flags(net, gw_addr, |
| 1923 | gwa_type & IPV6_ADDR_LINKLOCAL ? |
| 1924 | dev : NULL, 0, 0)) |
Florian Westphal | 48ed7b2 | 2015-05-21 00:25:41 +0200 | [diff] [blame] | 1925 | goto out; |
| 1926 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1927 | rt->rt6i_gateway = *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | |
| 1929 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1930 | struct rt6_info *grt; |
| 1931 | |
| 1932 | /* IPv6 strictly inhibits using not link-local |
| 1933 | addresses as nexthop address. |
| 1934 | Otherwise, router will not able to send redirects. |
| 1935 | It is very good, but in some (rare!) circumstances |
| 1936 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1937 | some exceptions. --ANK |
| 1938 | */ |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1939 | if (!(gwa_type & IPV6_ADDR_UNICAST)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | goto out; |
| 1941 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1942 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | |
| 1944 | err = -EHOSTUNREACH; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1945 | if (!grt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | goto out; |
| 1947 | if (dev) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1948 | if (dev != grt->dst.dev) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1949 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | goto out; |
| 1951 | } |
| 1952 | } else { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1953 | dev = grt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | idev = grt->rt6i_idev; |
| 1955 | dev_hold(dev); |
| 1956 | in6_dev_hold(grt->rt6i_idev); |
| 1957 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1958 | if (!(grt->rt6i_flags & RTF_GATEWAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | err = 0; |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1960 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | |
| 1962 | if (err) |
| 1963 | goto out; |
| 1964 | } |
| 1965 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1966 | if (!dev || (dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | goto out; |
| 1968 | } |
| 1969 | |
| 1970 | err = -ENODEV; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1971 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | goto out; |
| 1973 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1974 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) { |
| 1975 | if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { |
| 1976 | err = -EINVAL; |
| 1977 | goto out; |
| 1978 | } |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1979 | rt->rt6i_prefsrc.addr = cfg->fc_prefsrc; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1980 | rt->rt6i_prefsrc.plen = 128; |
| 1981 | } else |
| 1982 | rt->rt6i_prefsrc.plen = 0; |
| 1983 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1984 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | |
| 1986 | install_route: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1987 | rt->dst.dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1989 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1990 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1991 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1992 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 1993 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | out: |
| 1995 | if (dev) |
| 1996 | dev_put(dev); |
| 1997 | if (idev) |
| 1998 | in6_dev_put(idev); |
| 1999 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2000 | dst_free(&rt->dst); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2001 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2002 | return ERR_PTR(err); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2003 | } |
| 2004 | |
| 2005 | int ip6_route_add(struct fib6_config *cfg) |
| 2006 | { |
| 2007 | struct mx6_config mxc = { .mx = NULL, }; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2008 | struct rt6_info *rt; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2009 | int err; |
| 2010 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2011 | rt = ip6_route_info_create(cfg); |
| 2012 | if (IS_ERR(rt)) { |
| 2013 | err = PTR_ERR(rt); |
| 2014 | rt = NULL; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2015 | goto out; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2016 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2017 | |
| 2018 | err = ip6_convert_metrics(&mxc, cfg); |
| 2019 | if (err) |
| 2020 | goto out; |
| 2021 | |
| 2022 | err = __ip6_ins_rt(rt, &cfg->fc_nlinfo, &mxc); |
| 2023 | |
| 2024 | kfree(mxc.mx); |
| 2025 | |
| 2026 | return err; |
| 2027 | out: |
| 2028 | if (rt) |
| 2029 | dst_free(&rt->dst); |
| 2030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | return err; |
| 2032 | } |
| 2033 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2034 | 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] | 2035 | { |
| 2036 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2037 | struct fib6_table *table; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2038 | struct net *net = dev_net(rt->dst.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 2040 | if (rt == net->ipv6.ip6_null_entry || |
| 2041 | rt->dst.flags & DST_NOCACHE) { |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 2042 | err = -ENOENT; |
| 2043 | goto out; |
| 2044 | } |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 2045 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2046 | table = rt->rt6i_table; |
| 2047 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2048 | err = fib6_del(rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2049 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 2051 | out: |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2052 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | return err; |
| 2054 | } |
| 2055 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2056 | int ip6_del_rt(struct rt6_info *rt) |
| 2057 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 2058 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2059 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 2060 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2061 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2062 | } |
| 2063 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2064 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2066 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | struct fib6_node *fn; |
| 2068 | struct rt6_info *rt; |
| 2069 | int err = -ESRCH; |
| 2070 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2071 | 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] | 2072 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2073 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2075 | read_lock_bh(&table->tb6_lock); |
| 2076 | |
| 2077 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2078 | &cfg->fc_dst, cfg->fc_dst_len, |
| 2079 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | if (fn) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2082 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
Martin KaFai Lau | 1f56a01 | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2083 | if ((rt->rt6i_flags & RTF_CACHE) && |
| 2084 | !(cfg->fc_flags & RTF_CACHE)) |
| 2085 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2086 | if (cfg->fc_ifindex && |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2087 | (!rt->dst.dev || |
| 2088 | rt->dst.dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2090 | if (cfg->fc_flags & RTF_GATEWAY && |
| 2091 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2093 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2095 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2096 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2098 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | } |
| 2100 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2101 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | |
| 2103 | return err; |
| 2104 | } |
| 2105 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 2106 | 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] | 2107 | { |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 2108 | struct netevent_redirect netevent; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2109 | struct rt6_info *rt, *nrt = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2110 | struct ndisc_options ndopts; |
| 2111 | struct inet6_dev *in6_dev; |
| 2112 | struct neighbour *neigh; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2113 | struct rd_msg *msg; |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2114 | int optlen, on_link; |
| 2115 | u8 *lladdr; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2116 | |
Simon Horman | 29a3cad | 2013-05-28 20:34:26 +0000 | [diff] [blame] | 2117 | 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] | 2118 | optlen -= sizeof(*msg); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2119 | |
| 2120 | if (optlen < 0) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2121 | net_dbg_ratelimited("rt6_do_redirect: packet too short\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2122 | return; |
| 2123 | } |
| 2124 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2125 | msg = (struct rd_msg *)icmp6_hdr(skb); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2126 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2127 | if (ipv6_addr_is_multicast(&msg->dest)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2128 | net_dbg_ratelimited("rt6_do_redirect: destination address is multicast\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2129 | return; |
| 2130 | } |
| 2131 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2132 | on_link = 0; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2133 | if (ipv6_addr_equal(&msg->dest, &msg->target)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2134 | on_link = 1; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2135 | } else if (ipv6_addr_type(&msg->target) != |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2136 | (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2137 | 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] | 2138 | return; |
| 2139 | } |
| 2140 | |
| 2141 | in6_dev = __in6_dev_get(skb->dev); |
| 2142 | if (!in6_dev) |
| 2143 | return; |
| 2144 | if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects) |
| 2145 | return; |
| 2146 | |
| 2147 | /* RFC2461 8.1: |
| 2148 | * The IP source address of the Redirect MUST be the same as the current |
| 2149 | * first-hop router for the specified ICMP Destination Address. |
| 2150 | */ |
| 2151 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2152 | if (!ndisc_parse_options(msg->opt, optlen, &ndopts)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2153 | net_dbg_ratelimited("rt6_redirect: invalid ND options\n"); |
| 2154 | return; |
| 2155 | } |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2156 | |
| 2157 | lladdr = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2158 | if (ndopts.nd_opts_tgt_lladdr) { |
| 2159 | lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, |
| 2160 | skb->dev); |
| 2161 | if (!lladdr) { |
| 2162 | net_dbg_ratelimited("rt6_redirect: invalid link-layer address length\n"); |
| 2163 | return; |
| 2164 | } |
| 2165 | } |
| 2166 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2167 | rt = (struct rt6_info *) dst; |
Matthias Schiffer | ec13ad1 | 2015-11-02 01:24:38 +0100 | [diff] [blame] | 2168 | if (rt->rt6i_flags & RTF_REJECT) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2169 | net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n"); |
| 2170 | return; |
| 2171 | } |
| 2172 | |
| 2173 | /* Redirect received -> path was valid. |
| 2174 | * Look, redirects are sent only in response to data packets, |
| 2175 | * so that this nexthop apparently is reachable. --ANK |
| 2176 | */ |
| 2177 | dst_confirm(&rt->dst); |
| 2178 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2179 | neigh = __neigh_lookup(&nd_tbl, &msg->target, skb->dev, 1); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2180 | if (!neigh) |
| 2181 | return; |
| 2182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | /* |
| 2184 | * We have finally decided to accept it. |
| 2185 | */ |
| 2186 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2187 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 2189 | NEIGH_UPDATE_F_OVERRIDE| |
| 2190 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 2191 | NEIGH_UPDATE_F_ISROUTER)) |
| 2192 | ); |
| 2193 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2194 | nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2195 | if (!nrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | goto out; |
| 2197 | |
| 2198 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 2199 | if (on_link) |
| 2200 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 2201 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2202 | nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 2204 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | goto out; |
| 2206 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2207 | netevent.old = &rt->dst; |
| 2208 | netevent.new = &nrt->dst; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 2209 | netevent.daddr = &msg->dest; |
YOSHIFUJI Hideaki / 吉藤英明 | 6059283 | 2013-01-14 09:28:27 +0000 | [diff] [blame] | 2210 | netevent.neigh = neigh; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 2211 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 2212 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2213 | if (rt->rt6i_flags & RTF_CACHE) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2214 | rt = (struct rt6_info *) dst_clone(&rt->dst); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2215 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | } |
| 2217 | |
| 2218 | out: |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 2219 | neigh_release(neigh); |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 2220 | } |
| 2221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | * Misc support functions |
| 2224 | */ |
| 2225 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 2226 | static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from) |
| 2227 | { |
| 2228 | BUG_ON(from->dst.from); |
| 2229 | |
| 2230 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 2231 | dst_hold(&from->dst); |
| 2232 | rt->dst.from = &from->dst; |
| 2233 | dst_init_metrics(&rt->dst, dst_metrics_ptr(&from->dst), true); |
| 2234 | } |
| 2235 | |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2236 | 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] | 2237 | { |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2238 | rt->dst.input = ort->dst.input; |
| 2239 | rt->dst.output = ort->dst.output; |
| 2240 | rt->rt6i_dst = ort->rt6i_dst; |
| 2241 | rt->dst.error = ort->dst.error; |
| 2242 | rt->rt6i_idev = ort->rt6i_idev; |
| 2243 | if (rt->rt6i_idev) |
| 2244 | in6_dev_hold(rt->rt6i_idev); |
| 2245 | rt->dst.lastuse = jiffies; |
| 2246 | rt->rt6i_gateway = ort->rt6i_gateway; |
| 2247 | rt->rt6i_flags = ort->rt6i_flags; |
| 2248 | rt6_set_from(rt, ort); |
| 2249 | rt->rt6i_metric = ort->rt6i_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | #ifdef CONFIG_IPV6_SUBTREES |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2251 | rt->rt6i_src = ort->rt6i_src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | #endif |
Martin KaFai Lau | 83a09ab | 2015-05-22 20:56:05 -0700 | [diff] [blame] | 2253 | rt->rt6i_prefsrc = ort->rt6i_prefsrc; |
| 2254 | rt->rt6i_table = ort->rt6i_table; |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 2255 | rt->dst.lwtstate = lwtstate_get(ort->dst.lwtstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | } |
| 2257 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2258 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2259 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2260 | const struct in6_addr *prefix, int prefixlen, |
| 2261 | const struct in6_addr *gwaddr, int ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2262 | { |
| 2263 | struct fib6_node *fn; |
| 2264 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2265 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2266 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2267 | table = fib6_get_table(net, RT6_TABLE_INFO); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2268 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2269 | return NULL; |
| 2270 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2271 | read_lock_bh(&table->tb6_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2272 | fn = fib6_locate(&table->tb6_root, prefix, prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2273 | if (!fn) |
| 2274 | goto out; |
| 2275 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2276 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2277 | if (rt->dst.dev->ifindex != ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2278 | continue; |
| 2279 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 2280 | continue; |
| 2281 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 2282 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2283 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2284 | break; |
| 2285 | } |
| 2286 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2287 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2288 | return rt; |
| 2289 | } |
| 2290 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2291 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2292 | const struct in6_addr *prefix, int prefixlen, |
| 2293 | const struct in6_addr *gwaddr, int ifindex, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2294 | unsigned int pref) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2295 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2296 | struct fib6_config cfg = { |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 2297 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2298 | .fc_ifindex = ifindex, |
| 2299 | .fc_dst_len = prefixlen, |
| 2300 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 2301 | RTF_UP | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2302 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2303 | .fc_nlinfo.nlh = NULL, |
| 2304 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2305 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2306 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2307 | cfg.fc_table = l3mdev_fib_table_by_index(net, ifindex) ? : RT6_TABLE_INFO; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2308 | cfg.fc_dst = *prefix; |
| 2309 | cfg.fc_gateway = *gwaddr; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2310 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 2311 | /* We should treat it as a default route if prefix length is 0. */ |
| 2312 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2313 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2314 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2315 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2316 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 2317 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 2318 | } |
| 2319 | #endif |
| 2320 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2321 | 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] | 2322 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2324 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2326 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2327 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2328 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2330 | read_lock_bh(&table->tb6_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2331 | 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] | 2332 | if (dev == rt->dst.dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 2333 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 2335 | break; |
| 2336 | } |
| 2337 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2338 | dst_hold(&rt->dst); |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2339 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | return rt; |
| 2341 | } |
| 2342 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2343 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 2344 | struct net_device *dev, |
| 2345 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2347 | struct fib6_config cfg = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2348 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 2349 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2350 | .fc_ifindex = dev->ifindex, |
| 2351 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 2352 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2353 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2354 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2355 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2356 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2358 | cfg.fc_gateway = *gwaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2360 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | return rt6_get_dflt_router(gwaddr, dev); |
| 2363 | } |
| 2364 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 2365 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | { |
| 2367 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2368 | struct fib6_table *table; |
| 2369 | |
| 2370 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 2371 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2372 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2373 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | |
| 2375 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2376 | read_lock_bh(&table->tb6_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2377 | for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) { |
Lorenzo Colitti | 3e8b0ac | 2013-03-03 20:46:46 +0000 | [diff] [blame] | 2378 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) && |
| 2379 | (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2380 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2381 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2382 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | goto restart; |
| 2384 | } |
| 2385 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2386 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | } |
| 2388 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2389 | static void rtmsg_to_fib6_config(struct net *net, |
| 2390 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2391 | struct fib6_config *cfg) |
| 2392 | { |
| 2393 | memset(cfg, 0, sizeof(*cfg)); |
| 2394 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2395 | cfg->fc_table = l3mdev_fib_table_by_index(net, rtmsg->rtmsg_ifindex) ? |
| 2396 | : RT6_TABLE_MAIN; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2397 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 2398 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 2399 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 2400 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 2401 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 2402 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 2403 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2404 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 2405 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2406 | cfg->fc_dst = rtmsg->rtmsg_dst; |
| 2407 | cfg->fc_src = rtmsg->rtmsg_src; |
| 2408 | cfg->fc_gateway = rtmsg->rtmsg_gateway; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2409 | } |
| 2410 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2411 | 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] | 2412 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2413 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | struct in6_rtmsg rtmsg; |
| 2415 | int err; |
| 2416 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 2417 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | case SIOCADDRT: /* Add a route */ |
| 2419 | case SIOCDELRT: /* Delete a route */ |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2420 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | return -EPERM; |
| 2422 | err = copy_from_user(&rtmsg, arg, |
| 2423 | sizeof(struct in6_rtmsg)); |
| 2424 | if (err) |
| 2425 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2426 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2427 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | rtnl_lock(); |
| 2430 | switch (cmd) { |
| 2431 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2432 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | break; |
| 2434 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2435 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | break; |
| 2437 | default: |
| 2438 | err = -EINVAL; |
| 2439 | } |
| 2440 | rtnl_unlock(); |
| 2441 | |
| 2442 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | |
| 2445 | return -EINVAL; |
| 2446 | } |
| 2447 | |
| 2448 | /* |
| 2449 | * Drop the packet on the floor |
| 2450 | */ |
| 2451 | |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 2452 | 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] | 2453 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2454 | int type; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2455 | struct dst_entry *dst = skb_dst(skb); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2456 | switch (ipstats_mib_noroutes) { |
| 2457 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 2458 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 2459 | if (type == IPV6_ADDR_ANY) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2460 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2461 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2462 | break; |
| 2463 | } |
| 2464 | /* FALLTHROUGH */ |
| 2465 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2466 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2467 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2468 | break; |
| 2469 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 2470 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | kfree_skb(skb); |
| 2472 | return 0; |
| 2473 | } |
| 2474 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2475 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 2476 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2477 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2478 | } |
| 2479 | |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 2480 | 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] | 2481 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2482 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2483 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | } |
| 2485 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2486 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 2487 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2488 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2489 | } |
| 2490 | |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 2491 | 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] | 2492 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2493 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2494 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2495 | } |
| 2496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | /* |
| 2498 | * Allocate a dst for local (unicast / anycast) address. |
| 2499 | */ |
| 2500 | |
| 2501 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 2502 | const struct in6_addr *addr, |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 2503 | bool anycast) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2505 | u32 tb_id; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2506 | struct net *net = dev_net(idev->dev); |
Hannes Frederic Sowa | a3300ef | 2013-12-07 03:33:45 +0100 | [diff] [blame] | 2507 | struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, |
Martin KaFai Lau | ad70686 | 2015-08-14 11:05:52 -0700 | [diff] [blame] | 2508 | DST_NOCOUNT); |
Hannes Frederic Sowa | a3300ef | 2013-12-07 03:33:45 +0100 | [diff] [blame] | 2509 | if (!rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | return ERR_PTR(-ENOMEM); |
| 2511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | in6_dev_hold(idev); |
| 2513 | |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 2514 | rt->dst.flags |= DST_HOST; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2515 | rt->dst.input = ip6_input; |
| 2516 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | rt->rt6i_idev = idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | |
| 2519 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 2520 | if (anycast) |
| 2521 | rt->rt6i_flags |= RTF_ANYCAST; |
| 2522 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | rt->rt6i_flags |= RTF_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 2525 | rt->rt6i_gateway = *addr; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2526 | rt->rt6i_dst.addr = *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | rt->rt6i_dst.plen = 128; |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2528 | tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL; |
| 2529 | rt->rt6i_table = fib6_get_table(net, tb_id); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 2530 | rt->dst.flags |= DST_NOCACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2532 | atomic_set(&rt->dst.__refcnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | |
| 2534 | return rt; |
| 2535 | } |
| 2536 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2537 | int ip6_route_get_saddr(struct net *net, |
| 2538 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2539 | const struct in6_addr *daddr, |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2540 | unsigned int prefs, |
| 2541 | struct in6_addr *saddr) |
| 2542 | { |
Markus Stenberg | e16e888 | 2015-05-05 13:36:59 +0300 | [diff] [blame] | 2543 | struct inet6_dev *idev = |
| 2544 | rt ? ip6_dst_idev((struct dst_entry *)rt) : NULL; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2545 | int err = 0; |
Markus Stenberg | e16e888 | 2015-05-05 13:36:59 +0300 | [diff] [blame] | 2546 | if (rt && rt->rt6i_prefsrc.plen) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2547 | *saddr = rt->rt6i_prefsrc.addr; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2548 | else |
| 2549 | err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
| 2550 | daddr, prefs, saddr); |
| 2551 | return err; |
| 2552 | } |
| 2553 | |
| 2554 | /* remove deleted ip from prefsrc entries */ |
| 2555 | struct arg_dev_net_ip { |
| 2556 | struct net_device *dev; |
| 2557 | struct net *net; |
| 2558 | struct in6_addr *addr; |
| 2559 | }; |
| 2560 | |
| 2561 | static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) |
| 2562 | { |
| 2563 | struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; |
| 2564 | struct net *net = ((struct arg_dev_net_ip *)arg)->net; |
| 2565 | struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; |
| 2566 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2567 | if (((void *)rt->dst.dev == dev || !dev) && |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2568 | rt != net->ipv6.ip6_null_entry && |
| 2569 | ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { |
| 2570 | /* remove prefsrc entry */ |
| 2571 | rt->rt6i_prefsrc.plen = 0; |
| 2572 | } |
| 2573 | return 0; |
| 2574 | } |
| 2575 | |
| 2576 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) |
| 2577 | { |
| 2578 | struct net *net = dev_net(ifp->idev->dev); |
| 2579 | struct arg_dev_net_ip adni = { |
| 2580 | .dev = ifp->idev->dev, |
| 2581 | .net = net, |
| 2582 | .addr = &ifp->addr, |
| 2583 | }; |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2584 | fib6_clean_all(net, fib6_remove_prefsrc, &adni); |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2585 | } |
| 2586 | |
Duan Jiong | be7a010 | 2014-05-15 15:56:14 +0800 | [diff] [blame] | 2587 | #define RTF_RA_ROUTER (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY) |
| 2588 | #define RTF_CACHE_GATEWAY (RTF_GATEWAY | RTF_CACHE) |
| 2589 | |
| 2590 | /* Remove routers and update dst entries when gateway turn into host. */ |
| 2591 | static int fib6_clean_tohost(struct rt6_info *rt, void *arg) |
| 2592 | { |
| 2593 | struct in6_addr *gateway = (struct in6_addr *)arg; |
| 2594 | |
| 2595 | if ((((rt->rt6i_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) || |
| 2596 | ((rt->rt6i_flags & RTF_CACHE_GATEWAY) == RTF_CACHE_GATEWAY)) && |
| 2597 | ipv6_addr_equal(gateway, &rt->rt6i_gateway)) { |
| 2598 | return -1; |
| 2599 | } |
| 2600 | return 0; |
| 2601 | } |
| 2602 | |
| 2603 | void rt6_clean_tohost(struct net *net, struct in6_addr *gateway) |
| 2604 | { |
| 2605 | fib6_clean_all(net, fib6_clean_tohost, gateway); |
| 2606 | } |
| 2607 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2608 | struct arg_dev_net { |
| 2609 | struct net_device *dev; |
| 2610 | struct net *net; |
| 2611 | }; |
| 2612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 2614 | { |
stephen hemminger | bc3ef66 | 2010-12-16 17:42:40 +0000 | [diff] [blame] | 2615 | const struct arg_dev_net *adn = arg; |
| 2616 | const struct net_device *dev = adn->dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2617 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2618 | if ((rt->dst.dev == dev || !dev) && |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2619 | rt != adn->net->ipv6.ip6_null_entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | return -1; |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | return 0; |
| 2623 | } |
| 2624 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2625 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2627 | struct arg_dev_net adn = { |
| 2628 | .dev = dev, |
| 2629 | .net = net, |
| 2630 | }; |
| 2631 | |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2632 | fib6_clean_all(net, fib6_ifdown, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 2633 | icmp6_clean_all(fib6_ifdown, &adn); |
Eric W. Biederman | e332bc6 | 2015-10-12 11:02:08 -0500 | [diff] [blame] | 2634 | if (dev) |
| 2635 | rt6_uncached_list_flush_dev(net, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | } |
| 2637 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2638 | struct rt6_mtu_change_arg { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | struct net_device *dev; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2640 | unsigned int mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2641 | }; |
| 2642 | |
| 2643 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 2644 | { |
| 2645 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 2646 | struct inet6_dev *idev; |
| 2647 | |
| 2648 | /* In IPv6 pmtu discovery is not optional, |
| 2649 | so that RTAX_MTU lock cannot disable it. |
| 2650 | We still use this lock to block changes |
| 2651 | caused by addrconf/ndisc. |
| 2652 | */ |
| 2653 | |
| 2654 | idev = __in6_dev_get(arg->dev); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2655 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | return 0; |
| 2657 | |
| 2658 | /* For administrative MTU increase, there is no way to discover |
| 2659 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 2660 | Since RFC 1981 doesn't include administrative MTU increase |
| 2661 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 2662 | */ |
| 2663 | /* |
| 2664 | If new MTU is less than route PMTU, this new MTU will be the |
| 2665 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 2666 | decreases; if new MTU is greater than route PMTU, and the |
| 2667 | old MTU is the lowest MTU in the path, update the route PMTU |
| 2668 | to reflect the increase. In this case if the other nodes' MTU |
| 2669 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 2670 | PMTU discouvery. |
| 2671 | */ |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2672 | if (rt->dst.dev == arg->dev && |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 2673 | !dst_metric_locked(&rt->dst, RTAX_MTU)) { |
| 2674 | if (rt->rt6i_flags & RTF_CACHE) { |
| 2675 | /* For RTF_CACHE with rt6i_pmtu == 0 |
| 2676 | * (i.e. a redirected route), |
| 2677 | * the metrics of its rt->dst.from has already |
| 2678 | * been updated. |
| 2679 | */ |
| 2680 | if (rt->rt6i_pmtu && rt->rt6i_pmtu > arg->mtu) |
| 2681 | rt->rt6i_pmtu = arg->mtu; |
| 2682 | } else if (dst_mtu(&rt->dst) >= arg->mtu || |
| 2683 | (dst_mtu(&rt->dst) < arg->mtu && |
| 2684 | dst_mtu(&rt->dst) == idev->cnf.mtu6)) { |
| 2685 | dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu); |
| 2686 | } |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2687 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | return 0; |
| 2689 | } |
| 2690 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2691 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2693 | struct rt6_mtu_change_arg arg = { |
| 2694 | .dev = dev, |
| 2695 | .mtu = mtu, |
| 2696 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | |
Li RongQing | 0c3584d | 2013-12-27 16:32:38 +0800 | [diff] [blame] | 2698 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | } |
| 2700 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2701 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2702 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2703 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2704 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2705 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2706 | [RTA_METRICS] = { .type = NLA_NESTED }, |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2707 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2708 | [RTA_PREF] = { .type = NLA_U8 }, |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2709 | [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, |
| 2710 | [RTA_ENCAP] = { .type = NLA_NESTED }, |
Xin Long | 32bc201 | 2015-12-16 17:50:11 +0800 | [diff] [blame] | 2711 | [RTA_EXPIRES] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2712 | }; |
| 2713 | |
| 2714 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2715 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2717 | struct rtmsg *rtm; |
| 2718 | struct nlattr *tb[RTA_MAX+1]; |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2719 | unsigned int pref; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2720 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2722 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2723 | if (err < 0) |
| 2724 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2725 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2726 | err = -EINVAL; |
| 2727 | rtm = nlmsg_data(nlh); |
| 2728 | memset(cfg, 0, sizeof(*cfg)); |
| 2729 | |
| 2730 | cfg->fc_table = rtm->rtm_table; |
| 2731 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2732 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2733 | cfg->fc_flags = RTF_UP; |
| 2734 | cfg->fc_protocol = rtm->rtm_protocol; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2735 | cfg->fc_type = rtm->rtm_type; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2736 | |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2737 | if (rtm->rtm_type == RTN_UNREACHABLE || |
| 2738 | rtm->rtm_type == RTN_BLACKHOLE || |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 2739 | rtm->rtm_type == RTN_PROHIBIT || |
| 2740 | rtm->rtm_type == RTN_THROW) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2741 | cfg->fc_flags |= RTF_REJECT; |
| 2742 | |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2743 | if (rtm->rtm_type == RTN_LOCAL) |
| 2744 | cfg->fc_flags |= RTF_LOCAL; |
| 2745 | |
Martin KaFai Lau | 1f56a01 | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2746 | if (rtm->rtm_flags & RTM_F_CLONED) |
| 2747 | cfg->fc_flags |= RTF_CACHE; |
| 2748 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2749 | cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2750 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2751 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2752 | |
| 2753 | if (tb[RTA_GATEWAY]) { |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2754 | cfg->fc_gateway = nla_get_in6_addr(tb[RTA_GATEWAY]); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2755 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2756 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2757 | |
| 2758 | if (tb[RTA_DST]) { |
| 2759 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2760 | |
| 2761 | if (nla_len(tb[RTA_DST]) < plen) |
| 2762 | goto errout; |
| 2763 | |
| 2764 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2766 | |
| 2767 | if (tb[RTA_SRC]) { |
| 2768 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2769 | |
| 2770 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2771 | goto errout; |
| 2772 | |
| 2773 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2775 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2776 | if (tb[RTA_PREFSRC]) |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2777 | cfg->fc_prefsrc = nla_get_in6_addr(tb[RTA_PREFSRC]); |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2778 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2779 | if (tb[RTA_OIF]) |
| 2780 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2781 | |
| 2782 | if (tb[RTA_PRIORITY]) |
| 2783 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2784 | |
| 2785 | if (tb[RTA_METRICS]) { |
| 2786 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2787 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2789 | |
| 2790 | if (tb[RTA_TABLE]) |
| 2791 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2792 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2793 | if (tb[RTA_MULTIPATH]) { |
| 2794 | cfg->fc_mp = nla_data(tb[RTA_MULTIPATH]); |
| 2795 | cfg->fc_mp_len = nla_len(tb[RTA_MULTIPATH]); |
| 2796 | } |
| 2797 | |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 2798 | if (tb[RTA_PREF]) { |
| 2799 | pref = nla_get_u8(tb[RTA_PREF]); |
| 2800 | if (pref != ICMPV6_ROUTER_PREF_LOW && |
| 2801 | pref != ICMPV6_ROUTER_PREF_HIGH) |
| 2802 | pref = ICMPV6_ROUTER_PREF_MEDIUM; |
| 2803 | cfg->fc_flags |= RTF_PREF(pref); |
| 2804 | } |
| 2805 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2806 | if (tb[RTA_ENCAP]) |
| 2807 | cfg->fc_encap = tb[RTA_ENCAP]; |
| 2808 | |
| 2809 | if (tb[RTA_ENCAP_TYPE]) |
| 2810 | cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]); |
| 2811 | |
Xin Long | 32bc201 | 2015-12-16 17:50:11 +0800 | [diff] [blame] | 2812 | if (tb[RTA_EXPIRES]) { |
| 2813 | unsigned long timeout = addrconf_timeout_fixup(nla_get_u32(tb[RTA_EXPIRES]), HZ); |
| 2814 | |
| 2815 | if (addrconf_finite_timeout(timeout)) { |
| 2816 | cfg->fc_expires = jiffies_to_clock_t(timeout * HZ); |
| 2817 | cfg->fc_flags |= RTF_EXPIRES; |
| 2818 | } |
| 2819 | } |
| 2820 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2821 | err = 0; |
| 2822 | errout: |
| 2823 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | } |
| 2825 | |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2826 | struct rt6_nh { |
| 2827 | struct rt6_info *rt6_info; |
| 2828 | struct fib6_config r_cfg; |
| 2829 | struct mx6_config mxc; |
| 2830 | struct list_head next; |
| 2831 | }; |
| 2832 | |
| 2833 | static void ip6_print_replace_route_err(struct list_head *rt6_nh_list) |
| 2834 | { |
| 2835 | struct rt6_nh *nh; |
| 2836 | |
| 2837 | list_for_each_entry(nh, rt6_nh_list, next) { |
| 2838 | pr_warn("IPV6: multipath route replace failed (check consistency of installed routes): %pI6 nexthop %pI6 ifi %d\n", |
| 2839 | &nh->r_cfg.fc_dst, &nh->r_cfg.fc_gateway, |
| 2840 | nh->r_cfg.fc_ifindex); |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | static int ip6_route_info_append(struct list_head *rt6_nh_list, |
| 2845 | struct rt6_info *rt, struct fib6_config *r_cfg) |
| 2846 | { |
| 2847 | struct rt6_nh *nh; |
| 2848 | struct rt6_info *rtnh; |
| 2849 | int err = -EEXIST; |
| 2850 | |
| 2851 | list_for_each_entry(nh, rt6_nh_list, next) { |
| 2852 | /* check if rt6_info already exists */ |
| 2853 | rtnh = nh->rt6_info; |
| 2854 | |
| 2855 | if (rtnh->dst.dev == rt->dst.dev && |
| 2856 | rtnh->rt6i_idev == rt->rt6i_idev && |
| 2857 | ipv6_addr_equal(&rtnh->rt6i_gateway, |
| 2858 | &rt->rt6i_gateway)) |
| 2859 | return err; |
| 2860 | } |
| 2861 | |
| 2862 | nh = kzalloc(sizeof(*nh), GFP_KERNEL); |
| 2863 | if (!nh) |
| 2864 | return -ENOMEM; |
| 2865 | nh->rt6_info = rt; |
| 2866 | err = ip6_convert_metrics(&nh->mxc, r_cfg); |
| 2867 | if (err) { |
| 2868 | kfree(nh); |
| 2869 | return err; |
| 2870 | } |
| 2871 | memcpy(&nh->r_cfg, r_cfg, sizeof(*r_cfg)); |
| 2872 | list_add_tail(&nh->next, rt6_nh_list); |
| 2873 | |
| 2874 | return 0; |
| 2875 | } |
| 2876 | |
| 2877 | static int ip6_route_multipath_add(struct fib6_config *cfg) |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2878 | { |
| 2879 | struct fib6_config r_cfg; |
| 2880 | struct rtnexthop *rtnh; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2881 | struct rt6_info *rt; |
| 2882 | struct rt6_nh *err_nh; |
| 2883 | struct rt6_nh *nh, *nh_safe; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2884 | int remaining; |
| 2885 | int attrlen; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2886 | int err = 1; |
| 2887 | int nhn = 0; |
| 2888 | int replace = (cfg->fc_nlinfo.nlh && |
| 2889 | (cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_REPLACE)); |
| 2890 | LIST_HEAD(rt6_nh_list); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2891 | |
Michal Kubeček | 35f1b4e | 2015-05-18 20:53:55 +0200 | [diff] [blame] | 2892 | remaining = cfg->fc_mp_len; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2893 | rtnh = (struct rtnexthop *)cfg->fc_mp; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2894 | |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2895 | /* Parse a Multipath Entry and build a list (rt6_nh_list) of |
| 2896 | * rt6_info structs per nexthop |
| 2897 | */ |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2898 | while (rtnh_ok(rtnh, remaining)) { |
| 2899 | memcpy(&r_cfg, cfg, sizeof(*cfg)); |
| 2900 | if (rtnh->rtnh_ifindex) |
| 2901 | r_cfg.fc_ifindex = rtnh->rtnh_ifindex; |
| 2902 | |
| 2903 | attrlen = rtnh_attrlen(rtnh); |
| 2904 | if (attrlen > 0) { |
| 2905 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
| 2906 | |
| 2907 | nla = nla_find(attrs, attrlen, RTA_GATEWAY); |
| 2908 | if (nla) { |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 2909 | r_cfg.fc_gateway = nla_get_in6_addr(nla); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2910 | r_cfg.fc_flags |= RTF_GATEWAY; |
| 2911 | } |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 2912 | r_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP); |
| 2913 | nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE); |
| 2914 | if (nla) |
| 2915 | r_cfg.fc_encap_type = nla_get_u16(nla); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2916 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2917 | |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2918 | rt = ip6_route_info_create(&r_cfg); |
| 2919 | if (IS_ERR(rt)) { |
| 2920 | err = PTR_ERR(rt); |
| 2921 | rt = NULL; |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2922 | goto cleanup; |
Roopa Prabhu | 8c5b83f | 2015-10-10 08:26:36 -0700 | [diff] [blame] | 2923 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2924 | |
| 2925 | err = ip6_route_info_append(&rt6_nh_list, rt, &r_cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2926 | if (err) { |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2927 | dst_free(&rt->dst); |
| 2928 | goto cleanup; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2929 | } |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2930 | |
| 2931 | rtnh = rtnh_next(rtnh, &remaining); |
| 2932 | } |
| 2933 | |
| 2934 | err_nh = NULL; |
| 2935 | list_for_each_entry(nh, &rt6_nh_list, next) { |
| 2936 | err = __ip6_ins_rt(nh->rt6_info, &cfg->fc_nlinfo, &nh->mxc); |
| 2937 | /* nh->rt6_info is used or freed at this point, reset to NULL*/ |
| 2938 | nh->rt6_info = NULL; |
| 2939 | if (err) { |
| 2940 | if (replace && nhn) |
| 2941 | ip6_print_replace_route_err(&rt6_nh_list); |
| 2942 | err_nh = nh; |
| 2943 | goto add_errout; |
| 2944 | } |
| 2945 | |
Nicolas Dichtel | 1a72418 | 2012-11-01 22:58:22 +0000 | [diff] [blame] | 2946 | /* Because each route is added like a single route we remove |
Michal Kubeček | 2759647 | 2015-05-18 20:54:00 +0200 | [diff] [blame] | 2947 | * these flags after the first nexthop: if there is a collision, |
| 2948 | * we have already failed to add the first nexthop: |
| 2949 | * fib6_add_rt2node() has rejected it; when replacing, old |
| 2950 | * nexthops have been replaced by first new, the rest should |
| 2951 | * be added to it. |
Nicolas Dichtel | 1a72418 | 2012-11-01 22:58:22 +0000 | [diff] [blame] | 2952 | */ |
Michal Kubeček | 2759647 | 2015-05-18 20:54:00 +0200 | [diff] [blame] | 2953 | cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL | |
| 2954 | NLM_F_REPLACE); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2955 | nhn++; |
| 2956 | } |
| 2957 | |
| 2958 | goto cleanup; |
| 2959 | |
| 2960 | add_errout: |
| 2961 | /* Delete routes that were already added */ |
| 2962 | list_for_each_entry(nh, &rt6_nh_list, next) { |
| 2963 | if (err_nh == nh) |
| 2964 | break; |
| 2965 | ip6_route_del(&nh->r_cfg); |
| 2966 | } |
| 2967 | |
| 2968 | cleanup: |
| 2969 | list_for_each_entry_safe(nh, nh_safe, &rt6_nh_list, next) { |
| 2970 | if (nh->rt6_info) |
| 2971 | dst_free(&nh->rt6_info->dst); |
Wu Fengguang | 52fe51f | 2015-09-10 06:57:12 +0800 | [diff] [blame] | 2972 | kfree(nh->mxc.mx); |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 2973 | list_del(&nh->next); |
| 2974 | kfree(nh); |
| 2975 | } |
| 2976 | |
| 2977 | return err; |
| 2978 | } |
| 2979 | |
| 2980 | static int ip6_route_multipath_del(struct fib6_config *cfg) |
| 2981 | { |
| 2982 | struct fib6_config r_cfg; |
| 2983 | struct rtnexthop *rtnh; |
| 2984 | int remaining; |
| 2985 | int attrlen; |
| 2986 | int err = 1, last_err = 0; |
| 2987 | |
| 2988 | remaining = cfg->fc_mp_len; |
| 2989 | rtnh = (struct rtnexthop *)cfg->fc_mp; |
| 2990 | |
| 2991 | /* Parse a Multipath Entry */ |
| 2992 | while (rtnh_ok(rtnh, remaining)) { |
| 2993 | memcpy(&r_cfg, cfg, sizeof(*cfg)); |
| 2994 | if (rtnh->rtnh_ifindex) |
| 2995 | r_cfg.fc_ifindex = rtnh->rtnh_ifindex; |
| 2996 | |
| 2997 | attrlen = rtnh_attrlen(rtnh); |
| 2998 | if (attrlen > 0) { |
| 2999 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
| 3000 | |
| 3001 | nla = nla_find(attrs, attrlen, RTA_GATEWAY); |
| 3002 | if (nla) { |
| 3003 | nla_memcpy(&r_cfg.fc_gateway, nla, 16); |
| 3004 | r_cfg.fc_flags |= RTF_GATEWAY; |
| 3005 | } |
| 3006 | } |
| 3007 | err = ip6_route_del(&r_cfg); |
| 3008 | if (err) |
| 3009 | last_err = err; |
| 3010 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3011 | rtnh = rtnh_next(rtnh, &remaining); |
| 3012 | } |
| 3013 | |
| 3014 | return last_err; |
| 3015 | } |
| 3016 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3017 | static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3019 | struct fib6_config cfg; |
| 3020 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3022 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 3023 | if (err < 0) |
| 3024 | return err; |
| 3025 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3026 | if (cfg.fc_mp) |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3027 | return ip6_route_multipath_del(&cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3028 | else |
| 3029 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | } |
| 3031 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3032 | static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3034 | struct fib6_config cfg; |
| 3035 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3037 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 3038 | if (err < 0) |
| 3039 | return err; |
| 3040 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3041 | if (cfg.fc_mp) |
Roopa Prabhu | 6b9ea5a | 2015-09-08 10:53:04 -0700 | [diff] [blame] | 3042 | return ip6_route_multipath_add(&cfg); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 3043 | else |
| 3044 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | } |
| 3046 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3047 | static inline size_t rt6_nlmsg_size(struct rt6_info *rt) |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3048 | { |
| 3049 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 3050 | + nla_total_size(16) /* RTA_SRC */ |
| 3051 | + nla_total_size(16) /* RTA_DST */ |
| 3052 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 3053 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 3054 | + nla_total_size(4) /* RTA_TABLE */ |
| 3055 | + nla_total_size(4) /* RTA_IIF */ |
| 3056 | + nla_total_size(4) /* RTA_OIF */ |
| 3057 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 3058 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Daniel Borkmann | ea69763 | 2015-01-05 23:57:47 +0100 | [diff] [blame] | 3059 | + nla_total_size(sizeof(struct rta_cacheinfo)) |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 3060 | + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */ |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3061 | + nla_total_size(1) /* RTA_PREF */ |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 3062 | + lwtunnel_get_encap_size(rt->dst.lwtstate); |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3063 | } |
| 3064 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3065 | static int rt6_fill_node(struct net *net, |
| 3066 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 3067 | struct in6_addr *dst, struct in6_addr *src, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3068 | int iif, int type, u32 portid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3069 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | { |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 3071 | u32 metrics[RTAX_MAX]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3073 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 3074 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3075 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3076 | |
| 3077 | if (prefix) { /* user wants prefix routes only */ |
| 3078 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 3079 | /* success since this is not a prefix route */ |
| 3080 | return 1; |
| 3081 | } |
| 3082 | } |
| 3083 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3084 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*rtm), flags); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3085 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3086 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3087 | |
| 3088 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3089 | rtm->rtm_family = AF_INET6; |
| 3090 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 3091 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 3092 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 3093 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3094 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 3095 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 3096 | table = RT6_TABLE_UNSPEC; |
| 3097 | rtm->rtm_table = table; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3098 | if (nla_put_u32(skb, RTA_TABLE, table)) |
| 3099 | goto nla_put_failure; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 3100 | if (rt->rt6i_flags & RTF_REJECT) { |
| 3101 | switch (rt->dst.error) { |
| 3102 | case -EINVAL: |
| 3103 | rtm->rtm_type = RTN_BLACKHOLE; |
| 3104 | break; |
| 3105 | case -EACCES: |
| 3106 | rtm->rtm_type = RTN_PROHIBIT; |
| 3107 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 3108 | case -EAGAIN: |
| 3109 | rtm->rtm_type = RTN_THROW; |
| 3110 | break; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 3111 | default: |
| 3112 | rtm->rtm_type = RTN_UNREACHABLE; |
| 3113 | break; |
| 3114 | } |
| 3115 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3116 | else if (rt->rt6i_flags & RTF_LOCAL) |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 3117 | rtm->rtm_type = RTN_LOCAL; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 3118 | else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | rtm->rtm_type = RTN_LOCAL; |
| 3120 | else |
| 3121 | rtm->rtm_type = RTN_UNICAST; |
| 3122 | rtm->rtm_flags = 0; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 3123 | if (!netif_carrier_ok(rt->dst.dev)) { |
Andy Gospodarek | cea45e2 | 2015-08-13 10:39:00 -0400 | [diff] [blame] | 3124 | rtm->rtm_flags |= RTNH_F_LINKDOWN; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 3125 | if (rt->rt6i_idev->cnf.ignore_routes_with_linkdown) |
| 3126 | rtm->rtm_flags |= RTNH_F_DEAD; |
| 3127 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 3129 | rtm->rtm_protocol = rt->rt6i_protocol; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3130 | if (rt->rt6i_flags & RTF_DYNAMIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | rtm->rtm_protocol = RTPROT_REDIRECT; |
Denis Ovsienko | f0396f60 | 2012-07-10 04:45:50 +0000 | [diff] [blame] | 3132 | else if (rt->rt6i_flags & RTF_ADDRCONF) { |
| 3133 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO)) |
| 3134 | rtm->rtm_protocol = RTPROT_RA; |
| 3135 | else |
| 3136 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 3137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3138 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3139 | if (rt->rt6i_flags & RTF_CACHE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3140 | rtm->rtm_flags |= RTM_F_CLONED; |
| 3141 | |
| 3142 | if (dst) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3143 | if (nla_put_in6_addr(skb, RTA_DST, dst)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3144 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3145 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3146 | } else if (rtm->rtm_dst_len) |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3147 | 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] | 3148 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | #ifdef CONFIG_IPV6_SUBTREES |
| 3150 | if (src) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3151 | if (nla_put_in6_addr(skb, RTA_SRC, src)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3152 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3153 | rtm->rtm_src_len = 128; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3154 | } else if (rtm->rtm_src_len && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3155 | nla_put_in6_addr(skb, RTA_SRC, &rt->rt6i_src.addr)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3156 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3157 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3158 | if (iif) { |
| 3159 | #ifdef CONFIG_IPV6_MROUTE |
| 3160 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 3161 | int err = ip6mr_get_route(net, skb, rtm, nowait); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3162 | if (err <= 0) { |
| 3163 | if (!nowait) { |
| 3164 | if (err == 0) |
| 3165 | return 0; |
| 3166 | goto nla_put_failure; |
| 3167 | } else { |
| 3168 | if (err == -EMSGSIZE) |
| 3169 | goto nla_put_failure; |
| 3170 | } |
| 3171 | } |
| 3172 | } else |
| 3173 | #endif |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3174 | if (nla_put_u32(skb, RTA_IIF, iif)) |
| 3175 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3176 | } else if (dst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3177 | struct in6_addr saddr_buf; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3178 | if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0 && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3179 | nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3180 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3181 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3182 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 3183 | if (rt->rt6i_prefsrc.plen) { |
| 3184 | struct in6_addr saddr_buf; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3185 | saddr_buf = rt->rt6i_prefsrc.addr; |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3186 | if (nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3187 | goto nla_put_failure; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 3188 | } |
| 3189 | |
Martin KaFai Lau | 4b32b5a | 2015-04-28 13:03:06 -0700 | [diff] [blame] | 3190 | memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); |
| 3191 | if (rt->rt6i_pmtu) |
| 3192 | metrics[RTAX_MTU - 1] = rt->rt6i_pmtu; |
| 3193 | if (rtnetlink_put_metrics(skb, metrics) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3194 | goto nla_put_failure; |
| 3195 | |
YOSHIFUJI Hideaki / 吉藤英明 | dd0cbf2 | 2013-01-17 12:53:15 +0000 | [diff] [blame] | 3196 | if (rt->rt6i_flags & RTF_GATEWAY) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 3197 | if (nla_put_in6_addr(skb, RTA_GATEWAY, &rt->rt6i_gateway) < 0) |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 3198 | goto nla_put_failure; |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 3199 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3200 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 3201 | if (rt->dst.dev && |
| 3202 | nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) |
| 3203 | goto nla_put_failure; |
| 3204 | if (nla_put_u32(skb, RTA_PRIORITY, rt->rt6i_metric)) |
| 3205 | goto nla_put_failure; |
Li Wei | 8253947 | 2012-07-29 16:01:30 +0000 | [diff] [blame] | 3206 | |
| 3207 | expires = (rt->rt6i_flags & RTF_EXPIRES) ? rt->dst.expires - jiffies : 0; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 3208 | |
David S. Miller | 87a5069 | 2012-07-10 05:06:14 -0700 | [diff] [blame] | 3209 | 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] | 3210 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | |
Lubomir Rintel | c78ba6d | 2015-03-11 15:39:21 +0100 | [diff] [blame] | 3212 | if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags))) |
| 3213 | goto nla_put_failure; |
| 3214 | |
Jiri Benc | 61adedf | 2015-08-20 13:56:25 +0200 | [diff] [blame] | 3215 | lwtunnel_fill_encap(skb, rt->dst.lwtstate); |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3216 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3217 | nlmsg_end(skb, nlh); |
| 3218 | return 0; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3219 | |
| 3220 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3221 | nlmsg_cancel(skb, nlh); |
| 3222 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3223 | } |
| 3224 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 3225 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3226 | { |
| 3227 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 3228 | int prefix; |
| 3229 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 3230 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 3231 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3232 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 3233 | } else |
| 3234 | prefix = 0; |
| 3235 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3236 | return rt6_fill_node(arg->net, |
| 3237 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3238 | NETLINK_CB(arg->cb->skb).portid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3239 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3240 | } |
| 3241 | |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3242 | 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] | 3243 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3244 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3245 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3247 | struct sk_buff *skb; |
| 3248 | struct rtmsg *rtm; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3249 | struct flowi6 fl6; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3250 | int err, iif = 0, oif = 0; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3251 | |
| 3252 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 3253 | if (err < 0) |
| 3254 | goto errout; |
| 3255 | |
| 3256 | err = -EINVAL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3257 | memset(&fl6, 0, sizeof(fl6)); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3258 | |
| 3259 | if (tb[RTA_SRC]) { |
| 3260 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 3261 | goto errout; |
| 3262 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3263 | fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3264 | } |
| 3265 | |
| 3266 | if (tb[RTA_DST]) { |
| 3267 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 3268 | goto errout; |
| 3269 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 3270 | fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3271 | } |
| 3272 | |
| 3273 | if (tb[RTA_IIF]) |
| 3274 | iif = nla_get_u32(tb[RTA_IIF]); |
| 3275 | |
| 3276 | if (tb[RTA_OIF]) |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3277 | oif = nla_get_u32(tb[RTA_OIF]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3278 | |
Lorenzo Colitti | 2e47b29 | 2014-05-15 16:38:41 -0700 | [diff] [blame] | 3279 | if (tb[RTA_MARK]) |
| 3280 | fl6.flowi6_mark = nla_get_u32(tb[RTA_MARK]); |
| 3281 | |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3282 | if (iif) { |
| 3283 | struct net_device *dev; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3284 | int flags = 0; |
| 3285 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3286 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3287 | if (!dev) { |
| 3288 | err = -ENODEV; |
| 3289 | goto errout; |
| 3290 | } |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3291 | |
| 3292 | fl6.flowi6_iif = iif; |
| 3293 | |
| 3294 | if (!ipv6_addr_any(&fl6.saddr)) |
| 3295 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 3296 | |
| 3297 | rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, |
| 3298 | flags); |
| 3299 | } else { |
| 3300 | fl6.flowi6_oif = oif; |
| 3301 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 3302 | if (netif_index_is_l3_master(net, oif)) { |
| 3303 | fl6.flowi6_flags = FLOWI_FLAG_L3MDEV_SRC | |
| 3304 | FLOWI_FLAG_SKIP_NH_OIF; |
| 3305 | } |
| 3306 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 3307 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3308 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3309 | |
| 3310 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3311 | if (!skb) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 3312 | ip6_rt_put(rt); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3313 | err = -ENOBUFS; |
| 3314 | goto errout; |
| 3315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | |
| 3317 | /* Reserve room for dummy headers, this skb can pass |
| 3318 | through good chunk of routing engine. |
| 3319 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 3320 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3321 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 3322 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3323 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 3325 | 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] | 3326 | RTM_NEWROUTE, NETLINK_CB(in_skb).portid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3327 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3328 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3329 | kfree_skb(skb); |
| 3330 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | } |
| 3332 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3333 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 3334 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3335 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3336 | } |
| 3337 | |
Roopa Prabhu | 37a1d36 | 2015-09-13 10:18:33 -0700 | [diff] [blame] | 3338 | void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info, |
| 3339 | unsigned int nlm_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | { |
| 3341 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3342 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 3343 | u32 seq; |
| 3344 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 3346 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3347 | seq = info->nlh ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 3348 | |
Roopa Prabhu | 19e42e4 | 2015-07-21 10:43:48 +0200 | [diff] [blame] | 3349 | skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any()); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 3350 | if (!skb) |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 3351 | goto errout; |
| 3352 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 3353 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
Roopa Prabhu | 37a1d36 | 2015-09-13 10:18:33 -0700 | [diff] [blame] | 3354 | event, info->portid, seq, 0, 0, nlm_flags); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3355 | if (err < 0) { |
| 3356 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 3357 | WARN_ON(err == -EMSGSIZE); |
| 3358 | kfree_skb(skb); |
| 3359 | goto errout; |
| 3360 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3361 | rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE, |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 3362 | info->nlh, gfp_any()); |
| 3363 | return; |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 3364 | errout: |
| 3365 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 3366 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3367 | } |
| 3368 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3369 | static int ip6_route_dev_notify(struct notifier_block *this, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3370 | unsigned long event, void *ptr) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3371 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3372 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3373 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3374 | |
| 3375 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3376 | net->ipv6.ip6_null_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3377 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 3378 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3379 | net->ipv6.ip6_prohibit_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3380 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3381 | net->ipv6.ip6_blk_hole_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3382 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 3383 | #endif |
| 3384 | } |
| 3385 | |
| 3386 | return NOTIFY_OK; |
| 3387 | } |
| 3388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3389 | /* |
| 3390 | * /proc |
| 3391 | */ |
| 3392 | |
| 3393 | #ifdef CONFIG_PROC_FS |
| 3394 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 3395 | static const struct file_operations ipv6_route_proc_fops = { |
| 3396 | .owner = THIS_MODULE, |
| 3397 | .open = ipv6_route_open, |
| 3398 | .read = seq_read, |
| 3399 | .llseek = seq_lseek, |
Hannes Frederic Sowa | 8d2ca1d | 2013-09-21 16:55:59 +0200 | [diff] [blame] | 3400 | .release = seq_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 3401 | }; |
| 3402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3403 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 3404 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3405 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3406 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3407 | net->ipv6.rt6_stats->fib_nodes, |
| 3408 | net->ipv6.rt6_stats->fib_route_nodes, |
| 3409 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 3410 | net->ipv6.rt6_stats->fib_rt_entries, |
| 3411 | net->ipv6.rt6_stats->fib_rt_cache, |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3412 | dst_entries_get_slow(&net->ipv6.ip6_dst_ops), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3413 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3414 | |
| 3415 | return 0; |
| 3416 | } |
| 3417 | |
| 3418 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 3419 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 3420 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 3421 | } |
| 3422 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 3423 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | .owner = THIS_MODULE, |
| 3425 | .open = rt6_stats_seq_open, |
| 3426 | .read = seq_read, |
| 3427 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 3428 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3429 | }; |
| 3430 | #endif /* CONFIG_PROC_FS */ |
| 3431 | |
| 3432 | #ifdef CONFIG_SYSCTL |
| 3433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 3435 | int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3436 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 3437 | { |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3438 | struct net *net; |
| 3439 | int delay; |
| 3440 | if (!write) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | return -EINVAL; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3442 | |
| 3443 | net = (struct net *)ctl->extra1; |
| 3444 | delay = net->ipv6.sysctl.flush_delay; |
| 3445 | proc_dointvec(ctl, write, buffer, lenp, ppos); |
Michal Kubeček | 2ac3ac8 | 2013-08-01 10:04:14 +0200 | [diff] [blame] | 3446 | 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] | 3447 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3448 | } |
| 3449 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 3450 | struct ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3451 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3452 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3453 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3454 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 3455 | .mode = 0200, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3456 | .proc_handler = ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | }, |
| 3458 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 3460 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3461 | .maxlen = sizeof(int), |
| 3462 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3463 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | }, |
| 3465 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3466 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3467 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3468 | .maxlen = sizeof(int), |
| 3469 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3470 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | }, |
| 3472 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3473 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3474 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3475 | .maxlen = sizeof(int), |
| 3476 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3477 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3478 | }, |
| 3479 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3480 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3481 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3482 | .maxlen = sizeof(int), |
| 3483 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3484 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3485 | }, |
| 3486 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3488 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | .maxlen = sizeof(int), |
| 3490 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3491 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3492 | }, |
| 3493 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3494 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3495 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | .maxlen = sizeof(int), |
| 3497 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 3498 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3499 | }, |
| 3500 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3501 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3502 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3503 | .maxlen = sizeof(int), |
| 3504 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3505 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3506 | }, |
| 3507 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3508 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3509 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3510 | .maxlen = sizeof(int), |
| 3511 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 3512 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3513 | }, |
| 3514 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3515 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 3516 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3517 | .maxlen = sizeof(int), |
| 3518 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 3519 | .proc_handler = proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3520 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 3521 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3522 | }; |
| 3523 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3524 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 3525 | { |
| 3526 | struct ctl_table *table; |
| 3527 | |
| 3528 | table = kmemdup(ipv6_route_table_template, |
| 3529 | sizeof(ipv6_route_table_template), |
| 3530 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3531 | |
| 3532 | if (table) { |
| 3533 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 3534 | table[0].extra1 = net; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 3535 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3536 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 3537 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 3538 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 3539 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 3540 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 3541 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 3542 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
Alexey Dobriyan | 9c69fab | 2009-12-18 20:11:03 -0800 | [diff] [blame] | 3543 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
Eric W. Biederman | 464dc80 | 2012-11-16 03:02:59 +0000 | [diff] [blame] | 3544 | |
| 3545 | /* Don't export sysctls to unprivileged users */ |
| 3546 | if (net->user_ns != &init_user_ns) |
| 3547 | table[0].procname = NULL; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 3548 | } |
| 3549 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 3550 | return table; |
| 3551 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3552 | #endif |
| 3553 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3554 | static int __net_init ip6_route_net_init(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3555 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 3556 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3557 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 3558 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
| 3559 | sizeof(net->ipv6.ip6_dst_ops)); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3560 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3561 | if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0) |
| 3562 | goto out_ip6_dst_ops; |
| 3563 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3564 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 3565 | sizeof(*net->ipv6.ip6_null_entry), |
| 3566 | GFP_KERNEL); |
| 3567 | if (!net->ipv6.ip6_null_entry) |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3568 | goto out_ip6_dst_entries; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3569 | net->ipv6.ip6_null_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3570 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3571 | 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] | 3572 | dst_init_metrics(&net->ipv6.ip6_null_entry->dst, |
| 3573 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3574 | |
| 3575 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3576 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 3577 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 3578 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3579 | if (!net->ipv6.ip6_prohibit_entry) |
| 3580 | goto out_ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3581 | net->ipv6.ip6_prohibit_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3582 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3583 | 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] | 3584 | dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst, |
| 3585 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3586 | |
| 3587 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 3588 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 3589 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3590 | if (!net->ipv6.ip6_blk_hole_entry) |
| 3591 | goto out_ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3592 | net->ipv6.ip6_blk_hole_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3593 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3594 | 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] | 3595 | dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst, |
| 3596 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3597 | #endif |
| 3598 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 3599 | net->ipv6.sysctl.flush_delay = 0; |
| 3600 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 3601 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 3602 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 3603 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 3604 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 3605 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 3606 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 3607 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 3608 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 3609 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3610 | ret = 0; |
| 3611 | out: |
| 3612 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3613 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3614 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3615 | out_ip6_prohibit_entry: |
| 3616 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3617 | out_ip6_null_entry: |
| 3618 | kfree(net->ipv6.ip6_null_entry); |
| 3619 | #endif |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3620 | out_ip6_dst_entries: |
| 3621 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3622 | out_ip6_dst_ops: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3623 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3624 | } |
| 3625 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3626 | static void __net_exit ip6_route_net_exit(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3627 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3628 | kfree(net->ipv6.ip6_null_entry); |
| 3629 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3630 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3631 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 3632 | #endif |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3633 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3634 | } |
| 3635 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3636 | static int __net_init ip6_route_net_init_late(struct net *net) |
| 3637 | { |
| 3638 | #ifdef CONFIG_PROC_FS |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 3639 | proc_create("ipv6_route", 0, net->proc_net, &ipv6_route_proc_fops); |
| 3640 | 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] | 3641 | #endif |
| 3642 | return 0; |
| 3643 | } |
| 3644 | |
| 3645 | static void __net_exit ip6_route_net_exit_late(struct net *net) |
| 3646 | { |
| 3647 | #ifdef CONFIG_PROC_FS |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 3648 | remove_proc_entry("ipv6_route", net->proc_net); |
| 3649 | remove_proc_entry("rt6_stats", net->proc_net); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3650 | #endif |
| 3651 | } |
| 3652 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3653 | static struct pernet_operations ip6_route_net_ops = { |
| 3654 | .init = ip6_route_net_init, |
| 3655 | .exit = ip6_route_net_exit, |
| 3656 | }; |
| 3657 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3658 | static int __net_init ipv6_inetpeer_init(struct net *net) |
| 3659 | { |
| 3660 | struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL); |
| 3661 | |
| 3662 | if (!bp) |
| 3663 | return -ENOMEM; |
| 3664 | inet_peer_base_init(bp); |
| 3665 | net->ipv6.peers = bp; |
| 3666 | return 0; |
| 3667 | } |
| 3668 | |
| 3669 | static void __net_exit ipv6_inetpeer_exit(struct net *net) |
| 3670 | { |
| 3671 | struct inet_peer_base *bp = net->ipv6.peers; |
| 3672 | |
| 3673 | net->ipv6.peers = NULL; |
David S. Miller | 56a6b24 | 2012-06-09 16:32:41 -0700 | [diff] [blame] | 3674 | inetpeer_invalidate_tree(bp); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3675 | kfree(bp); |
| 3676 | } |
| 3677 | |
David S. Miller | 2b823f7 | 2012-06-09 19:00:16 -0700 | [diff] [blame] | 3678 | static struct pernet_operations ipv6_inetpeer_ops = { |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3679 | .init = ipv6_inetpeer_init, |
| 3680 | .exit = ipv6_inetpeer_exit, |
| 3681 | }; |
| 3682 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3683 | static struct pernet_operations ip6_route_net_late_ops = { |
| 3684 | .init = ip6_route_net_init_late, |
| 3685 | .exit = ip6_route_net_exit_late, |
| 3686 | }; |
| 3687 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3688 | static struct notifier_block ip6_route_dev_notifier = { |
| 3689 | .notifier_call = ip6_route_dev_notify, |
| 3690 | .priority = 0, |
| 3691 | }; |
| 3692 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3693 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3694 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3695 | int ret; |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 3696 | int cpu; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3697 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 3698 | ret = -ENOMEM; |
| 3699 | ip6_dst_ops_template.kmem_cachep = |
| 3700 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 3701 | SLAB_HWCACHE_ALIGN, NULL); |
| 3702 | if (!ip6_dst_ops_template.kmem_cachep) |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 3703 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 3704 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3705 | ret = dst_entries_init(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3706 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3707 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3708 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3709 | ret = register_pernet_subsys(&ipv6_inetpeer_ops); |
| 3710 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3711 | goto out_dst_entries; |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3712 | |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3713 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 3714 | if (ret) |
| 3715 | goto out_register_inetpeer; |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3716 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 3717 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 3718 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3719 | /* Registering of the loopback is done before this portion of code, |
| 3720 | * the loopback reference in rt6_info will not be taken, do it |
| 3721 | * manually for init_net */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3722 | init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3723 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3724 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3725 | init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3726 | 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] | 3727 | 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] | 3728 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3729 | #endif |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3730 | ret = fib6_init(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3731 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3732 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3733 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3734 | ret = xfrm6_init(); |
| 3735 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3736 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 3737 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3738 | ret = fib6_rules_init(); |
| 3739 | if (ret) |
| 3740 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 3741 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3742 | ret = register_pernet_subsys(&ip6_route_net_late_ops); |
| 3743 | if (ret) |
| 3744 | goto fib6_rules_init; |
| 3745 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3746 | ret = -ENOBUFS; |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 3747 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) || |
| 3748 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) || |
| 3749 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL)) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3750 | goto out_register_late_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3751 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3752 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3753 | if (ret) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3754 | goto out_register_late_subsys; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3755 | |
Martin KaFai Lau | 8d0b94a | 2015-05-22 20:56:04 -0700 | [diff] [blame] | 3756 | for_each_possible_cpu(cpu) { |
| 3757 | struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu); |
| 3758 | |
| 3759 | INIT_LIST_HEAD(&ul->head); |
| 3760 | spin_lock_init(&ul->lock); |
| 3761 | } |
| 3762 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3763 | out: |
| 3764 | return ret; |
| 3765 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3766 | out_register_late_subsys: |
| 3767 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3768 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3769 | fib6_rules_cleanup(); |
| 3770 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3771 | xfrm6_fini(); |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3772 | out_fib6_init: |
| 3773 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3774 | out_register_subsys: |
| 3775 | unregister_pernet_subsys(&ip6_route_net_ops); |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3776 | out_register_inetpeer: |
| 3777 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3778 | out_dst_entries: |
| 3779 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3780 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3781 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3782 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3783 | } |
| 3784 | |
| 3785 | void ip6_route_cleanup(void) |
| 3786 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3787 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3788 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 3789 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3791 | fib6_gc_cleanup(); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3792 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3793 | unregister_pernet_subsys(&ip6_route_net_ops); |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3794 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3795 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3796 | } |