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> |
| 57 | #include <net/xfrm.h> |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 58 | #include <net/netevent.h> |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 59 | #include <net/netlink.h> |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 60 | #include <net/nexthop.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | #include <asm/uaccess.h> |
| 63 | |
| 64 | #ifdef CONFIG_SYSCTL |
| 65 | #include <linux/sysctl.h> |
| 66 | #endif |
| 67 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 68 | enum rt6_nud_state { |
| 69 | RT6_NUD_FAIL_HARD = -2, |
| 70 | RT6_NUD_FAIL_SOFT = -1, |
| 71 | RT6_NUD_SUCCEED = 1 |
| 72 | }; |
| 73 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 74 | static struct rt6_info *ip6_rt_copy(struct rt6_info *ort, |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 75 | const struct in6_addr *dest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | 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] | 77 | static unsigned int ip6_default_advmss(const struct dst_entry *dst); |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 78 | static unsigned int ip6_mtu(const struct dst_entry *dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
| 80 | static void ip6_dst_destroy(struct dst_entry *); |
| 81 | static void ip6_dst_ifdown(struct dst_entry *, |
| 82 | struct net_device *dev, int how); |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 83 | static int ip6_dst_gc(struct dst_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | static int ip6_pkt_discard(struct sk_buff *skb); |
| 86 | static int ip6_pkt_discard_out(struct sk_buff *skb); |
| 87 | static void ip6_link_failure(struct sk_buff *skb); |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 88 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 89 | struct sk_buff *skb, u32 mtu); |
| 90 | static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, |
| 91 | struct sk_buff *skb); |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 92 | 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] | 93 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 94 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 95 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 96 | const struct in6_addr *prefix, int prefixlen, |
| 97 | const struct in6_addr *gwaddr, int ifindex, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 98 | unsigned int pref); |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 99 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 100 | const struct in6_addr *prefix, int prefixlen, |
| 101 | const struct in6_addr *gwaddr, int ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 102 | #endif |
| 103 | |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 104 | static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) |
| 105 | { |
| 106 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 107 | struct inet_peer *peer; |
| 108 | u32 *p = NULL; |
| 109 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 110 | if (!(rt->dst.flags & DST_HOST)) |
| 111 | return NULL; |
| 112 | |
David S. Miller | fbfe95a | 2012-06-08 23:24:18 -0700 | [diff] [blame] | 113 | peer = rt6_get_peer_create(rt); |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 114 | if (peer) { |
| 115 | u32 *old_p = __DST_METRICS_PTR(old); |
| 116 | unsigned long prev, new; |
| 117 | |
| 118 | p = peer->metrics; |
| 119 | if (inet_metrics_new(peer)) |
| 120 | memcpy(p, old_p, sizeof(u32) * RTAX_MAX); |
| 121 | |
| 122 | new = (unsigned long) p; |
| 123 | prev = cmpxchg(&dst->_metrics, old, new); |
| 124 | |
| 125 | if (prev != old) { |
| 126 | p = __DST_METRICS_PTR(prev); |
| 127 | if (prev & DST_METRICS_READ_ONLY) |
| 128 | p = NULL; |
| 129 | } |
| 130 | } |
| 131 | return p; |
| 132 | } |
| 133 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 134 | static inline const void *choose_neigh_daddr(struct rt6_info *rt, |
| 135 | struct sk_buff *skb, |
| 136 | const void *daddr) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 137 | { |
| 138 | struct in6_addr *p = &rt->rt6i_gateway; |
| 139 | |
David S. Miller | a7563f3 | 2012-01-26 16:29:16 -0500 | [diff] [blame] | 140 | if (!ipv6_addr_any(p)) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 141 | return (const void *) p; |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 142 | else if (skb) |
| 143 | return &ipv6_hdr(skb)->daddr; |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 144 | return daddr; |
| 145 | } |
| 146 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 147 | static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, |
| 148 | struct sk_buff *skb, |
| 149 | const void *daddr) |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 150 | { |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 151 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 152 | struct neighbour *n; |
| 153 | |
David S. Miller | f894cbf | 2012-07-02 21:52:24 -0700 | [diff] [blame] | 154 | daddr = choose_neigh_daddr(rt, skb, daddr); |
YOSHIFUJI Hideaki / 吉藤英明 | 8e022ee | 2013-01-17 12:53:09 +0000 | [diff] [blame] | 155 | n = __ipv6_neigh_lookup(dst->dev, daddr); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 156 | if (n) |
| 157 | return n; |
| 158 | return neigh_create(&nd_tbl, daddr, dst->dev); |
| 159 | } |
| 160 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 161 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 163 | .protocol = cpu_to_be16(ETH_P_IPV6), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | .gc = ip6_dst_gc, |
| 165 | .gc_thresh = 1024, |
| 166 | .check = ip6_dst_check, |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 167 | .default_advmss = ip6_default_advmss, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 168 | .mtu = ip6_mtu, |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 169 | .cow_metrics = ipv6_cow_metrics, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | .destroy = ip6_dst_destroy, |
| 171 | .ifdown = ip6_dst_ifdown, |
| 172 | .negative_advice = ip6_negative_advice, |
| 173 | .link_failure = ip6_link_failure, |
| 174 | .update_pmtu = ip6_rt_update_pmtu, |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 175 | .redirect = rt6_do_redirect, |
Herbert Xu | 1ac06e0 | 2008-05-20 14:32:14 -0700 | [diff] [blame] | 176 | .local_out = __ip6_local_out, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 177 | .neigh_lookup = ip6_neigh_lookup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | }; |
| 179 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 180 | static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst) |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 181 | { |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 182 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 183 | |
| 184 | return mtu ? : dst->dev->mtu; |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 185 | } |
| 186 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 187 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 188 | struct sk_buff *skb, u32 mtu) |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 189 | { |
| 190 | } |
| 191 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 192 | static void ip6_rt_blackhole_redirect(struct dst_entry *dst, struct sock *sk, |
| 193 | struct sk_buff *skb) |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 194 | { |
| 195 | } |
| 196 | |
Held Bernhard | 0972ddb | 2011-04-24 22:07:32 +0000 | [diff] [blame] | 197 | static u32 *ip6_rt_blackhole_cow_metrics(struct dst_entry *dst, |
| 198 | unsigned long old) |
| 199 | { |
| 200 | return NULL; |
| 201 | } |
| 202 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 203 | static struct dst_ops ip6_dst_blackhole_ops = { |
| 204 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 205 | .protocol = cpu_to_be16(ETH_P_IPV6), |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 206 | .destroy = ip6_dst_destroy, |
| 207 | .check = ip6_dst_check, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 208 | .mtu = ip6_blackhole_mtu, |
Eric Dumazet | 214f45c | 2011-02-18 11:39:01 -0800 | [diff] [blame] | 209 | .default_advmss = ip6_default_advmss, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 210 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
David S. Miller | b587ee3 | 2012-07-12 00:39:24 -0700 | [diff] [blame] | 211 | .redirect = ip6_rt_blackhole_redirect, |
Held Bernhard | 0972ddb | 2011-04-24 22:07:32 +0000 | [diff] [blame] | 212 | .cow_metrics = ip6_rt_blackhole_cow_metrics, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 213 | .neigh_lookup = ip6_neigh_lookup, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 214 | }; |
| 215 | |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 216 | static const u32 ip6_template_metrics[RTAX_MAX] = { |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 217 | [RTAX_HOPLIMIT - 1] = 0, |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 218 | }; |
| 219 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 220 | static const struct rt6_info ip6_null_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 221 | .dst = { |
| 222 | .__refcnt = ATOMIC_INIT(1), |
| 223 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 224 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 225 | .error = -ENETUNREACH, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 226 | .input = ip6_pkt_discard, |
| 227 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | }, |
| 229 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 230 | .rt6i_protocol = RTPROT_KERNEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | .rt6i_metric = ~(u32) 0, |
| 232 | .rt6i_ref = ATOMIC_INIT(1), |
| 233 | }; |
| 234 | |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 235 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 236 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 237 | static int ip6_pkt_prohibit(struct sk_buff *skb); |
| 238 | static int ip6_pkt_prohibit_out(struct sk_buff *skb); |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 239 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 240 | static const struct rt6_info ip6_prohibit_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 241 | .dst = { |
| 242 | .__refcnt = ATOMIC_INIT(1), |
| 243 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 244 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 245 | .error = -EACCES, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 246 | .input = ip6_pkt_prohibit, |
| 247 | .output = ip6_pkt_prohibit_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 248 | }, |
| 249 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 250 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 251 | .rt6i_metric = ~(u32) 0, |
| 252 | .rt6i_ref = ATOMIC_INIT(1), |
| 253 | }; |
| 254 | |
Eric Dumazet | fb0af4c | 2012-09-11 21:47:51 +0000 | [diff] [blame] | 255 | static const struct rt6_info ip6_blk_hole_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 256 | .dst = { |
| 257 | .__refcnt = ATOMIC_INIT(1), |
| 258 | .__use = 1, |
Nicolas Dichtel | 2c20cbd | 2012-09-10 22:09:47 +0000 | [diff] [blame] | 259 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 260 | .error = -EINVAL, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 261 | .input = dst_discard, |
| 262 | .output = dst_discard, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 263 | }, |
| 264 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 265 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 266 | .rt6i_metric = ~(u32) 0, |
| 267 | .rt6i_ref = ATOMIC_INIT(1), |
| 268 | }; |
| 269 | |
| 270 | #endif |
| 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | /* allocate dst with ip6_dst_ops */ |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 273 | static inline struct rt6_info *ip6_dst_alloc(struct net *net, |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 274 | struct net_device *dev, |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 275 | int flags, |
| 276 | struct fib6_table *table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 278 | struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev, |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 279 | 0, DST_OBSOLETE_FORCE_CHK, flags); |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 280 | |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 281 | if (rt) { |
Steffen Klassert | 8104891 | 2012-07-05 23:37:09 +0000 | [diff] [blame] | 282 | struct dst_entry *dst = &rt->dst; |
| 283 | |
| 284 | memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst)); |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 285 | rt6_init_peer(rt, table ? &table->tb6_peers : net->ipv6.peers); |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 286 | rt->rt6i_genid = rt_genid_ipv6(net); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 287 | INIT_LIST_HEAD(&rt->rt6i_siblings); |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 288 | } |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 289 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | static void ip6_dst_destroy(struct dst_entry *dst) |
| 293 | { |
| 294 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 295 | struct inet6_dev *idev = rt->rt6i_idev; |
YOSHIFUJI Hideaki / 吉藤英明 | ecd9883 | 2013-02-20 00:29:08 +0000 | [diff] [blame] | 296 | struct dst_entry *from = dst->from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 298 | if (!(rt->dst.flags & DST_HOST)) |
| 299 | dst_destroy_metrics_generic(dst); |
| 300 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 301 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | rt->rt6i_idev = NULL; |
| 303 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 304 | } |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 305 | |
YOSHIFUJI Hideaki / 吉藤英明 | ecd9883 | 2013-02-20 00:29:08 +0000 | [diff] [blame] | 306 | dst->from = NULL; |
| 307 | dst_release(from); |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 308 | |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 309 | if (rt6_has_peer(rt)) { |
| 310 | struct inet_peer *peer = rt6_peer_ptr(rt); |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 311 | inet_putpeer(peer); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | void rt6_bind_peer(struct rt6_info *rt, int create) |
| 316 | { |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 317 | struct inet_peer_base *base; |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 318 | struct inet_peer *peer; |
| 319 | |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 320 | base = inetpeer_base_ptr(rt->_rt6i_peer); |
| 321 | if (!base) |
| 322 | return; |
| 323 | |
| 324 | peer = inet_getpeer_v6(base, &rt->rt6i_dst.addr, create); |
David S. Miller | 7b34ca2 | 2012-06-11 04:13:57 -0700 | [diff] [blame] | 325 | if (peer) { |
| 326 | if (!rt6_set_peer(rt, peer)) |
| 327 | inet_putpeer(peer); |
David S. Miller | 7b34ca2 | 2012-06-11 04:13:57 -0700 | [diff] [blame] | 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 332 | int how) |
| 333 | { |
| 334 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 335 | struct inet6_dev *idev = rt->rt6i_idev; |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 336 | struct net_device *loopback_dev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 337 | dev_net(dev)->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
David S. Miller | 97cac08 | 2012-07-02 22:43:47 -0700 | [diff] [blame] | 339 | if (dev != loopback_dev) { |
| 340 | if (idev && idev->dev == dev) { |
| 341 | struct inet6_dev *loopback_idev = |
| 342 | in6_dev_get(loopback_dev); |
| 343 | if (loopback_idev) { |
| 344 | rt->rt6i_idev = loopback_idev; |
| 345 | in6_dev_put(idev); |
| 346 | } |
| 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | } |
| 350 | |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 351 | static bool rt6_check_expired(const struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 353 | if (rt->rt6i_flags & RTF_EXPIRES) { |
| 354 | if (time_after(jiffies, rt->dst.expires)) |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 355 | return true; |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 356 | } else if (rt->dst.from) { |
Li RongQing | 3fd91fb | 2012-09-13 19:54:57 +0000 | [diff] [blame] | 357 | return rt6_check_expired((struct rt6_info *) rt->dst.from); |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 358 | } |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 359 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 362 | static bool rt6_need_strict(const struct in6_addr *daddr) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 363 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 364 | return ipv6_addr_type(daddr) & |
| 365 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 368 | /* Multipath route selection: |
| 369 | * Hash based function using packet header and flowlabel. |
| 370 | * Adapted from fib_info_hashfn() |
| 371 | */ |
| 372 | static int rt6_info_hash_nhsfn(unsigned int candidate_count, |
| 373 | const struct flowi6 *fl6) |
| 374 | { |
| 375 | unsigned int val = fl6->flowi6_proto; |
| 376 | |
YOSHIFUJI Hideaki / 吉藤英明 | c08977b | 2013-01-13 05:02:29 +0000 | [diff] [blame] | 377 | val ^= ipv6_addr_hash(&fl6->daddr); |
| 378 | val ^= ipv6_addr_hash(&fl6->saddr); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 379 | |
| 380 | /* Work only if this not encapsulated */ |
| 381 | switch (fl6->flowi6_proto) { |
| 382 | case IPPROTO_UDP: |
| 383 | case IPPROTO_TCP: |
| 384 | case IPPROTO_SCTP: |
Nicolas Dichtel | b3ce5ae | 2012-10-22 23:35:06 +0000 | [diff] [blame] | 385 | val ^= (__force u16)fl6->fl6_sport; |
| 386 | val ^= (__force u16)fl6->fl6_dport; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 387 | break; |
| 388 | |
| 389 | case IPPROTO_ICMPV6: |
Nicolas Dichtel | b3ce5ae | 2012-10-22 23:35:06 +0000 | [diff] [blame] | 390 | val ^= (__force u16)fl6->fl6_icmp_type; |
| 391 | val ^= (__force u16)fl6->fl6_icmp_code; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 392 | break; |
| 393 | } |
| 394 | /* RFC6438 recommands to use flowlabel */ |
Nicolas Dichtel | b3ce5ae | 2012-10-22 23:35:06 +0000 | [diff] [blame] | 395 | val ^= (__force u32)fl6->flowlabel; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 396 | |
| 397 | /* Perhaps, we need to tune, this function? */ |
| 398 | val = val ^ (val >> 7) ^ (val >> 12); |
| 399 | return val % candidate_count; |
| 400 | } |
| 401 | |
| 402 | static struct rt6_info *rt6_multipath_select(struct rt6_info *match, |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 403 | struct flowi6 *fl6, int oif, |
| 404 | int strict) |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 405 | { |
| 406 | struct rt6_info *sibling, *next_sibling; |
| 407 | int route_choosen; |
| 408 | |
| 409 | route_choosen = rt6_info_hash_nhsfn(match->rt6i_nsiblings + 1, fl6); |
| 410 | /* Don't change the route, if route_choosen == 0 |
| 411 | * (siblings does not include ourself) |
| 412 | */ |
| 413 | if (route_choosen) |
| 414 | list_for_each_entry_safe(sibling, next_sibling, |
| 415 | &match->rt6i_siblings, rt6i_siblings) { |
| 416 | route_choosen--; |
| 417 | if (route_choosen == 0) { |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 418 | if (rt6_score_route(sibling, oif, strict) < 0) |
| 419 | break; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 420 | match = sibling; |
| 421 | break; |
| 422 | } |
| 423 | } |
| 424 | return match; |
| 425 | } |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 428 | * Route lookup. Any table->tb6_lock is implied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | */ |
| 430 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 431 | static inline struct rt6_info *rt6_device_match(struct net *net, |
| 432 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 433 | const struct in6_addr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 435 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
| 437 | struct rt6_info *local = NULL; |
| 438 | struct rt6_info *sprt; |
| 439 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 440 | if (!oif && ipv6_addr_any(saddr)) |
| 441 | goto out; |
| 442 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 443 | for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 444 | struct net_device *dev = sprt->dst.dev; |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 445 | |
| 446 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | if (dev->ifindex == oif) |
| 448 | return sprt; |
| 449 | if (dev->flags & IFF_LOOPBACK) { |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 450 | if (!sprt->rt6i_idev || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | sprt->rt6i_idev->dev->ifindex != oif) { |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 452 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | continue; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 454 | if (local && (!oif || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | local->rt6i_idev->dev->ifindex == oif)) |
| 456 | continue; |
| 457 | } |
| 458 | local = sprt; |
| 459 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 460 | } else { |
| 461 | if (ipv6_chk_addr(net, saddr, dev, |
| 462 | flags & RT6_LOOKUP_F_IFACE)) |
| 463 | return sprt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 465 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 467 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | if (local) |
| 469 | return local; |
| 470 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 471 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 472 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 474 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | return rt; |
| 476 | } |
| 477 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 478 | #ifdef CONFIG_IPV6_ROUTER_PREF |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 479 | struct __rt6_probe_work { |
| 480 | struct work_struct work; |
| 481 | struct in6_addr target; |
| 482 | struct net_device *dev; |
| 483 | }; |
| 484 | |
| 485 | static void rt6_probe_deferred(struct work_struct *w) |
| 486 | { |
| 487 | struct in6_addr mcaddr; |
| 488 | struct __rt6_probe_work *work = |
| 489 | container_of(w, struct __rt6_probe_work, work); |
| 490 | |
| 491 | addrconf_addr_solict_mult(&work->target, &mcaddr); |
| 492 | ndisc_send_ns(work->dev, NULL, &work->target, &mcaddr, NULL); |
| 493 | dev_put(work->dev); |
| 494 | kfree(w); |
| 495 | } |
| 496 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 497 | static void rt6_probe(struct rt6_info *rt) |
| 498 | { |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 499 | struct neighbour *neigh; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 500 | /* |
| 501 | * Okay, this does not seem to be appropriate |
| 502 | * for now, however, we need to check if it |
| 503 | * is really so; aka Router Reachability Probing. |
| 504 | * |
| 505 | * Router Reachability Probe MUST be rate-limited |
| 506 | * to no more than one per minute. |
| 507 | */ |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 508 | if (!rt || !(rt->rt6i_flags & RTF_GATEWAY)) |
Amerigo Wang | fdd6681 | 2012-09-10 02:48:44 +0000 | [diff] [blame] | 509 | return; |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 510 | rcu_read_lock_bh(); |
| 511 | neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway); |
| 512 | if (neigh) { |
| 513 | write_lock(&neigh->lock); |
| 514 | if (neigh->nud_state & NUD_VALID) |
| 515 | goto out; |
YOSHIFUJI Hideaki / 吉藤英明 | 7ff74a5 | 2013-01-17 12:53:02 +0000 | [diff] [blame] | 516 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 517 | |
| 518 | if (!neigh || |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 519 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 520 | struct __rt6_probe_work *work; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 521 | |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 522 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
| 523 | |
| 524 | if (neigh && work) |
YOSHIFUJI Hideaki / 吉藤英明 | b820bb6 | 2013-01-21 09:58:50 +0000 | [diff] [blame] | 525 | neigh->updated = jiffies; |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 526 | |
Hannes Frederic Sowa | c2f17e8 | 2013-10-21 06:17:15 +0200 | [diff] [blame] | 527 | if (neigh) |
| 528 | write_unlock(&neigh->lock); |
| 529 | |
| 530 | if (work) { |
| 531 | INIT_WORK(&work->work, rt6_probe_deferred); |
| 532 | work->target = rt->rt6i_gateway; |
| 533 | dev_hold(rt->dst.dev); |
| 534 | work->dev = rt->dst.dev; |
| 535 | schedule_work(&work->work); |
| 536 | } |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 537 | } else { |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 538 | out: |
| 539 | write_unlock(&neigh->lock); |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 540 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 2152cae | 2013-01-17 12:53:43 +0000 | [diff] [blame] | 541 | rcu_read_unlock_bh(); |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 542 | } |
| 543 | #else |
| 544 | static inline void rt6_probe(struct rt6_info *rt) |
| 545 | { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 546 | } |
| 547 | #endif |
| 548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 550 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 552 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 554 | struct net_device *dev = rt->dst.dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 555 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 556 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 557 | if ((dev->flags & IFF_LOOPBACK) && |
| 558 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 559 | return 1; |
| 560 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 563 | 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] | 564 | { |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 565 | struct neighbour *neigh; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 566 | enum rt6_nud_state ret = RT6_NUD_FAIL_HARD; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 567 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 568 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 569 | !(rt->rt6i_flags & RTF_GATEWAY)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 570 | return RT6_NUD_SUCCEED; |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 571 | |
| 572 | rcu_read_lock_bh(); |
| 573 | neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway); |
| 574 | if (neigh) { |
| 575 | read_lock(&neigh->lock); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 576 | if (neigh->nud_state & NUD_VALID) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 577 | ret = RT6_NUD_SUCCEED; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 578 | #ifdef CONFIG_IPV6_ROUTER_PREF |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 579 | else if (!(neigh->nud_state & NUD_FAILED)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 580 | ret = RT6_NUD_SUCCEED; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 581 | #endif |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 582 | read_unlock(&neigh->lock); |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 583 | } else { |
| 584 | ret = IS_ENABLED(CONFIG_IPV6_ROUTER_PREF) ? |
| 585 | RT6_NUD_SUCCEED : RT6_NUD_FAIL_SOFT; |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 586 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 145a362 | 2013-01-17 12:53:38 +0000 | [diff] [blame] | 587 | rcu_read_unlock_bh(); |
| 588 | |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 589 | return ret; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 590 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 592 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 593 | int strict) |
| 594 | { |
Paul Marks | a5a81f0 | 2012-12-03 10:26:54 +0000 | [diff] [blame] | 595 | int m; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 596 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 597 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 598 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 599 | return RT6_NUD_FAIL_HARD; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 600 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 601 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 602 | #endif |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 603 | if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 604 | int n = rt6_check_neigh(rt); |
| 605 | if (n < 0) |
| 606 | return n; |
| 607 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 608 | return m; |
| 609 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 611 | 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] | 612 | int *mpri, struct rt6_info *match, |
| 613 | bool *do_rr) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 614 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 615 | int m; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 616 | bool match_do_rr = false; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 617 | |
| 618 | if (rt6_check_expired(rt)) |
| 619 | goto out; |
| 620 | |
| 621 | m = rt6_score_route(rt, oif, strict); |
Duan Jiong | ba48650 | 2013-10-30 15:39:26 +0800 | [diff] [blame] | 622 | if (m == RT6_NUD_FAIL_SOFT) { |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 623 | match_do_rr = true; |
| 624 | m = 0; /* lowest valid score */ |
| 625 | } else if (m < 0) { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 626 | goto out; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 627 | } |
| 628 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 629 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 630 | rt6_probe(rt); |
| 631 | |
| 632 | if (m > *mpri) { |
| 633 | *do_rr = match_do_rr; |
| 634 | *mpri = m; |
| 635 | match = rt; |
| 636 | } |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 637 | out: |
| 638 | return match; |
| 639 | } |
| 640 | |
| 641 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 642 | struct rt6_info *rr_head, |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 643 | u32 metric, int oif, int strict, |
| 644 | bool *do_rr) |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 645 | { |
| 646 | struct rt6_info *rt, *match; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 647 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 649 | match = NULL; |
| 650 | for (rt = rr_head; rt && rt->rt6i_metric == metric; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 651 | rt = rt->dst.rt6_next) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 652 | match = find_match(rt, oif, strict, &mpri, match, do_rr); |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 653 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 654 | rt = rt->dst.rt6_next) |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 655 | match = find_match(rt, oif, strict, &mpri, match, do_rr); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 656 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 657 | return match; |
| 658 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 659 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 660 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 661 | { |
| 662 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 663 | struct net *net; |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 664 | bool do_rr = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 666 | rt0 = fn->rr_ptr; |
| 667 | if (!rt0) |
| 668 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 670 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict, |
| 671 | &do_rr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Hannes Frederic Sowa | afc154e | 2013-07-11 12:43:42 +0200 | [diff] [blame] | 673 | if (do_rr) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 674 | struct rt6_info *next = rt0->dst.rt6_next; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 675 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 676 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 677 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 678 | next = fn->leaf; |
| 679 | |
| 680 | if (next != rt0) |
| 681 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 684 | net = dev_net(rt0->dst.dev); |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 685 | return match ? match : net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 688 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 689 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 690 | const struct in6_addr *gwaddr) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 691 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 692 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 693 | struct route_info *rinfo = (struct route_info *) opt; |
| 694 | struct in6_addr prefix_buf, *prefix; |
| 695 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 696 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 697 | struct rt6_info *rt; |
| 698 | |
| 699 | if (len < sizeof(struct route_info)) { |
| 700 | return -EINVAL; |
| 701 | } |
| 702 | |
| 703 | /* Sanity check for prefix_len and length */ |
| 704 | if (rinfo->length > 3) { |
| 705 | return -EINVAL; |
| 706 | } else if (rinfo->prefix_len > 128) { |
| 707 | return -EINVAL; |
| 708 | } else if (rinfo->prefix_len > 64) { |
| 709 | if (rinfo->length < 2) { |
| 710 | return -EINVAL; |
| 711 | } |
| 712 | } else if (rinfo->prefix_len > 0) { |
| 713 | if (rinfo->length < 1) { |
| 714 | return -EINVAL; |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | pref = rinfo->route_pref; |
| 719 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
Jens Rosenboom | 3933fc9 | 2009-09-10 06:25:11 +0000 | [diff] [blame] | 720 | return -EINVAL; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 721 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 722 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 723 | |
| 724 | if (rinfo->length == 3) |
| 725 | prefix = (struct in6_addr *)rinfo->prefix; |
| 726 | else { |
| 727 | /* this function is safe */ |
| 728 | ipv6_addr_prefix(&prefix_buf, |
| 729 | (struct in6_addr *)rinfo->prefix, |
| 730 | rinfo->prefix_len); |
| 731 | prefix = &prefix_buf; |
| 732 | } |
| 733 | |
Duan Jiong | f104a56 | 2013-11-08 09:56:53 +0800 | [diff] [blame] | 734 | if (rinfo->prefix_len == 0) |
| 735 | rt = rt6_get_dflt_router(gwaddr, dev); |
| 736 | else |
| 737 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, |
| 738 | gwaddr, dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 739 | |
| 740 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 741 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 742 | rt = NULL; |
| 743 | } |
| 744 | |
| 745 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 746 | 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] | 747 | pref); |
| 748 | else if (rt) |
| 749 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 750 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 751 | |
| 752 | if (rt) { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 753 | if (!addrconf_finite_timeout(lifetime)) |
| 754 | rt6_clean_expires(rt); |
| 755 | else |
| 756 | rt6_set_expires(rt, jiffies + HZ * lifetime); |
| 757 | |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 758 | ip6_rt_put(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 759 | } |
| 760 | return 0; |
| 761 | } |
| 762 | #endif |
| 763 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 764 | #define BACKTRACK(__net, saddr) \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 765 | do { \ |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 766 | if (rt == __net->ipv6.ip6_null_entry) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 767 | struct fib6_node *pn; \ |
Ville Nuorvala | e0eda7b | 2006-10-16 22:11:11 -0700 | [diff] [blame] | 768 | while (1) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 769 | if (fn->fn_flags & RTN_TL_ROOT) \ |
| 770 | goto out; \ |
| 771 | pn = fn->parent; \ |
| 772 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ |
Kim Nordlund | 8bce65b | 2006-12-13 16:38:29 -0800 | [diff] [blame] | 773 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 774 | else \ |
| 775 | fn = pn; \ |
| 776 | if (fn->fn_flags & RTN_RTINFO) \ |
| 777 | goto restart; \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 778 | } \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 779 | } \ |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 780 | } while (0) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 781 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 782 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 783 | struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 784 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | { |
| 786 | struct fib6_node *fn; |
| 787 | struct rt6_info *rt; |
| 788 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 789 | read_lock_bh(&table->tb6_lock); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 790 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 791 | restart: |
| 792 | rt = fn->leaf; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 793 | rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags); |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 794 | if (rt->rt6i_nsiblings && fl6->flowi6_oif == 0) |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 795 | rt = rt6_multipath_select(rt, fl6, fl6->flowi6_oif, flags); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 796 | BACKTRACK(net, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 797 | out: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 798 | dst_use(&rt->dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 799 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 800 | return rt; |
| 801 | |
| 802 | } |
| 803 | |
Florian Westphal | ea6e574 | 2011-09-05 16:05:44 +0200 | [diff] [blame] | 804 | struct dst_entry * ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
| 805 | int flags) |
| 806 | { |
| 807 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup); |
| 808 | } |
| 809 | EXPORT_SYMBOL_GPL(ip6_route_lookup); |
| 810 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 811 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 812 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 813 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 814 | struct flowi6 fl6 = { |
| 815 | .flowi6_oif = oif, |
| 816 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 817 | }; |
| 818 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 819 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 820 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 821 | if (saddr) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 822 | memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 823 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 824 | } |
| 825 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 826 | dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 827 | if (dst->error == 0) |
| 828 | return (struct rt6_info *) dst; |
| 829 | |
| 830 | dst_release(dst); |
| 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | return NULL; |
| 833 | } |
| 834 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 835 | EXPORT_SYMBOL(rt6_lookup); |
| 836 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 837 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | It takes new route entry, the addition fails by any reason the |
| 839 | route is freed. In any case, if caller does not hold it, it may |
| 840 | be destroyed. |
| 841 | */ |
| 842 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 843 | static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | { |
| 845 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 846 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 848 | table = rt->rt6i_table; |
| 849 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 850 | err = fib6_add(&table->tb6_root, rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 851 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | return err; |
| 854 | } |
| 855 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 856 | int ip6_ins_rt(struct rt6_info *rt) |
| 857 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 858 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 859 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 860 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 861 | return __ip6_ins_rt(rt, &info); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 862 | } |
| 863 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 864 | static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 865 | const struct in6_addr *daddr, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 866 | const struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | struct rt6_info *rt; |
| 869 | |
| 870 | /* |
| 871 | * Clone the route. |
| 872 | */ |
| 873 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 874 | rt = ip6_rt_copy(ort, daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
| 876 | if (rt) { |
Duan Jiong | 249a363 | 2013-11-05 13:34:53 +0800 | [diff] [blame] | 877 | if (ort->rt6i_dst.plen != 128 && |
| 878 | ipv6_addr_equal(&ort->rt6i_dst.addr, daddr)) |
| 879 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | rt->rt6i_flags |= RTF_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
| 883 | #ifdef CONFIG_IPV6_SUBTREES |
| 884 | if (rt->rt6i_src.plen && saddr) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 885 | rt->rt6i_src.addr = *saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | rt->rt6i_src.plen = 128; |
| 887 | } |
| 888 | #endif |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 891 | return rt; |
| 892 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 894 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, |
| 895 | const struct in6_addr *daddr) |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 896 | { |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 897 | struct rt6_info *rt = ip6_rt_copy(ort, daddr); |
| 898 | |
YOSHIFUJI Hideaki / 吉藤英明 | 887c95c | 2013-01-17 12:54:05 +0000 | [diff] [blame] | 899 | if (rt) |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 900 | rt->rt6i_flags |= RTF_CACHE; |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 901 | return rt; |
| 902 | } |
| 903 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 904 | 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] | 905 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | { |
| 907 | struct fib6_node *fn; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 908 | struct rt6_info *rt, *nrt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 909 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | int attempts = 3; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 911 | int err; |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 912 | int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 914 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | relookup: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 917 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 919 | restart_2: |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 920 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | restart: |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 923 | rt = rt6_select(fn, oif, strict | reachable); |
Nicolas Dichtel | 52bd4c0 | 2013-06-28 17:35:48 +0200 | [diff] [blame] | 924 | if (rt->rt6i_nsiblings) |
| 925 | rt = rt6_multipath_select(rt, fl6, oif, strict | reachable); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 926 | BACKTRACK(net, &fl6->saddr); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 927 | if (rt == net->ipv6.ip6_null_entry || |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 928 | rt->rt6i_flags & RTF_CACHE) |
YOSHIFUJI Hideaki | 1ddef044 | 2006-03-20 17:01:24 -0800 | [diff] [blame] | 929 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 931 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 932 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 933 | |
YOSHIFUJI Hideaki / 吉藤英明 | c440f16 | 2013-01-17 12:53:32 +0000 | [diff] [blame] | 934 | if (!(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY))) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 935 | nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr); |
David S. Miller | 7343ff3 | 2011-03-09 19:55:25 -0800 | [diff] [blame] | 936 | else if (!(rt->dst.flags & DST_HOST)) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 937 | nrt = rt6_alloc_clone(rt, &fl6->daddr); |
David S. Miller | 7343ff3 | 2011-03-09 19:55:25 -0800 | [diff] [blame] | 938 | else |
| 939 | goto out2; |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 940 | |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 941 | ip6_rt_put(rt); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 942 | rt = nrt ? : net->ipv6.ip6_null_entry; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 943 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 944 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 945 | if (nrt) { |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 946 | err = ip6_ins_rt(nrt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 947 | if (!err) |
| 948 | goto out2; |
| 949 | } |
| 950 | |
| 951 | if (--attempts <= 0) |
| 952 | goto out2; |
| 953 | |
| 954 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 955 | * Race condition! In the gap, when table->tb6_lock was |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 956 | * released someone could insert this route. Relookup. |
| 957 | */ |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 958 | ip6_rt_put(rt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 959 | goto relookup; |
| 960 | |
| 961 | out: |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 962 | if (reachable) { |
| 963 | reachable = 0; |
| 964 | goto restart_2; |
| 965 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 966 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 967 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | out2: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 969 | rt->dst.lastuse = jiffies; |
| 970 | rt->dst.__use++; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 971 | |
| 972 | return rt; |
| 973 | } |
| 974 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 975 | 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] | 976 | struct flowi6 *fl6, int flags) |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 977 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 978 | return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 979 | } |
| 980 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 981 | static struct dst_entry *ip6_route_input_lookup(struct net *net, |
| 982 | struct net_device *dev, |
| 983 | struct flowi6 *fl6, int flags) |
| 984 | { |
| 985 | if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) |
| 986 | flags |= RT6_LOOKUP_F_IFACE; |
| 987 | |
| 988 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); |
| 989 | } |
| 990 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 991 | void ip6_route_input(struct sk_buff *skb) |
| 992 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 993 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 994 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 995 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 996 | struct flowi6 fl6 = { |
| 997 | .flowi6_iif = skb->dev->ifindex, |
| 998 | .daddr = iph->daddr, |
| 999 | .saddr = iph->saddr, |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1000 | .flowlabel = ip6_flowinfo(iph), |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1001 | .flowi6_mark = skb->mark, |
| 1002 | .flowi6_proto = iph->nexthdr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1003 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1004 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 1005 | 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] | 1006 | } |
| 1007 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1008 | 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] | 1009 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1010 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1011 | return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
Florian Westphal | 9c7a4f9 | 2011-03-22 19:17:36 -0700 | [diff] [blame] | 1014 | struct dst_entry * ip6_route_output(struct net *net, const struct sock *sk, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1015 | struct flowi6 *fl6) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1016 | { |
| 1017 | int flags = 0; |
| 1018 | |
Pavel Emelyanov | 1fb9489 | 2012-08-08 21:53:36 +0000 | [diff] [blame] | 1019 | fl6->flowi6_iif = LOOPBACK_IFINDEX; |
David McCullough | 4dc27d1c | 2012-06-25 15:42:26 +0000 | [diff] [blame] | 1020 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1021 | if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 1022 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1023 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1024 | if (!ipv6_addr_any(&fl6->saddr)) |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1025 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki / 吉藤英明 | 0c9a2ac | 2010-03-07 00:14:44 +0000 | [diff] [blame] | 1026 | else if (sk) |
| 1027 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1028 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1029 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | } |
| 1031 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1032 | EXPORT_SYMBOL(ip6_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 1034 | 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] | 1035 | { |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 1036 | struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1037 | struct dst_entry *new = NULL; |
| 1038 | |
David S. Miller | f5b0a87 | 2012-07-19 12:31:33 -0700 | [diff] [blame] | 1039 | 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] | 1040 | if (rt) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1041 | new = &rt->dst; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1042 | |
Steffen Klassert | 8104891 | 2012-07-05 23:37:09 +0000 | [diff] [blame] | 1043 | memset(new + 1, 0, sizeof(*rt) - sizeof(*new)); |
| 1044 | rt6_init_peer(rt, net->ipv6.peers); |
| 1045 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1046 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 1047 | new->input = dst_discard; |
| 1048 | new->output = dst_discard; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1049 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 1050 | if (dst_metrics_read_only(&ort->dst)) |
| 1051 | new->_metrics = ort->dst._metrics; |
| 1052 | else |
| 1053 | dst_copy_metrics(new, &ort->dst); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1054 | rt->rt6i_idev = ort->rt6i_idev; |
| 1055 | if (rt->rt6i_idev) |
| 1056 | in6_dev_hold(rt->rt6i_idev); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1057 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1058 | rt->rt6i_gateway = ort->rt6i_gateway; |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1059 | rt->rt6i_flags = ort->rt6i_flags; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1060 | rt->rt6i_metric = 0; |
| 1061 | |
| 1062 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1063 | #ifdef CONFIG_IPV6_SUBTREES |
| 1064 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1065 | #endif |
| 1066 | |
| 1067 | dst_free(new); |
| 1068 | } |
| 1069 | |
David S. Miller | 69ead7a | 2011-03-01 14:45:33 -0800 | [diff] [blame] | 1070 | dst_release(dst_orig); |
| 1071 | return new ? new : ERR_PTR(-ENOMEM); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1072 | } |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | /* |
| 1075 | * Destination cache support functions |
| 1076 | */ |
| 1077 | |
| 1078 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 1079 | { |
| 1080 | struct rt6_info *rt; |
| 1081 | |
| 1082 | rt = (struct rt6_info *) dst; |
| 1083 | |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 1084 | /* All IPV6 dsts are created with ->obsolete set to the value |
| 1085 | * DST_OBSOLETE_FORCE_CHK which forces validation calls down |
| 1086 | * into this function always. |
| 1087 | */ |
fan.du | ca4c3fc | 2013-07-30 08:33:53 +0800 | [diff] [blame] | 1088 | if (rt->rt6i_genid != rt_genid_ipv6(dev_net(rt->dst.dev))) |
Nicolas Dichtel | 6f3118b | 2012-09-10 22:09:46 +0000 | [diff] [blame] | 1089 | return NULL; |
| 1090 | |
Hannes Frederic Sowa | e3bc10b | 2013-10-24 07:48:24 +0200 | [diff] [blame] | 1091 | if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie)) |
| 1092 | return NULL; |
Li RongQing | a4477c4 | 2012-11-07 21:56:33 +0000 | [diff] [blame] | 1093 | |
Hannes Frederic Sowa | e3bc10b | 2013-10-24 07:48:24 +0200 | [diff] [blame] | 1094 | if (rt6_check_expired(rt)) |
| 1095 | return NULL; |
| 1096 | |
| 1097 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | } |
| 1099 | |
| 1100 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 1101 | { |
| 1102 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1103 | |
| 1104 | if (rt) { |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1105 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1106 | if (rt6_check_expired(rt)) { |
| 1107 | ip6_del_rt(rt); |
| 1108 | dst = NULL; |
| 1109 | } |
| 1110 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | dst_release(dst); |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1112 | dst = NULL; |
| 1113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1115 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | static void ip6_link_failure(struct sk_buff *skb) |
| 1119 | { |
| 1120 | struct rt6_info *rt; |
| 1121 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1122 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1124 | rt = (struct rt6_info *) skb_dst(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | if (rt) { |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1126 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1127 | dst_hold(&rt->dst); |
| 1128 | if (ip6_del_rt(rt)) |
| 1129 | dst_free(&rt->dst); |
| 1130 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | rt->rt6i_node->fn_sernum = -1; |
Hannes Frederic Sowa | 1eb4f75 | 2013-07-10 23:00:57 +0200 | [diff] [blame] | 1132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
| 1134 | } |
| 1135 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 1136 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 1137 | struct sk_buff *skb, u32 mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | { |
| 1139 | struct rt6_info *rt6 = (struct rt6_info*)dst; |
| 1140 | |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1141 | dst_confirm(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1143 | struct net *net = dev_net(dst->dev); |
| 1144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | rt6->rt6i_flags |= RTF_MODIFIED; |
| 1146 | if (mtu < IPV6_MIN_MTU) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1147 | u32 features = dst_metric(dst, RTAX_FEATURES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | mtu = IPV6_MIN_MTU; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1149 | features |= RTAX_FEATURE_ALLFRAG; |
| 1150 | dst_metric_set(dst, RTAX_FEATURES, features); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1152 | dst_metric_set(dst, RTAX_MTU, mtu); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1153 | rt6_update_expires(rt6, net->ipv6.sysctl.ip6_rt_mtu_expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | } |
| 1155 | } |
| 1156 | |
David S. Miller | 42ae66c | 2012-06-15 20:01:57 -0700 | [diff] [blame] | 1157 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, |
| 1158 | int oif, u32 mark) |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1159 | { |
| 1160 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1161 | struct dst_entry *dst; |
| 1162 | struct flowi6 fl6; |
| 1163 | |
| 1164 | memset(&fl6, 0, sizeof(fl6)); |
| 1165 | fl6.flowi6_oif = oif; |
| 1166 | fl6.flowi6_mark = mark; |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1167 | fl6.daddr = iph->daddr; |
| 1168 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1169 | fl6.flowlabel = ip6_flowinfo(iph); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1170 | |
| 1171 | dst = ip6_route_output(net, NULL, &fl6); |
| 1172 | if (!dst->error) |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 1173 | ip6_rt_update_pmtu(dst, NULL, skb, ntohl(mtu)); |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 1174 | dst_release(dst); |
| 1175 | } |
| 1176 | EXPORT_SYMBOL_GPL(ip6_update_pmtu); |
| 1177 | |
| 1178 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu) |
| 1179 | { |
| 1180 | ip6_update_pmtu(skb, sock_net(sk), mtu, |
| 1181 | sk->sk_bound_dev_if, sk->sk_mark); |
| 1182 | } |
| 1183 | EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu); |
| 1184 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1185 | /* Handle redirects */ |
| 1186 | struct ip6rd_flowi { |
| 1187 | struct flowi6 fl6; |
| 1188 | struct in6_addr gateway; |
| 1189 | }; |
| 1190 | |
| 1191 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1192 | struct fib6_table *table, |
| 1193 | struct flowi6 *fl6, |
| 1194 | int flags) |
| 1195 | { |
| 1196 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6; |
| 1197 | struct rt6_info *rt; |
| 1198 | struct fib6_node *fn; |
| 1199 | |
| 1200 | /* Get the "current" route for this destination and |
| 1201 | * check if the redirect has come from approriate router. |
| 1202 | * |
| 1203 | * RFC 4861 specifies that redirects should only be |
| 1204 | * accepted if they come from the nexthop to the target. |
| 1205 | * Due to the way the routes are chosen, this notion |
| 1206 | * is a bit fuzzy and one might need to check all possible |
| 1207 | * routes. |
| 1208 | */ |
| 1209 | |
| 1210 | read_lock_bh(&table->tb6_lock); |
| 1211 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
| 1212 | restart: |
| 1213 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
| 1214 | if (rt6_check_expired(rt)) |
| 1215 | continue; |
| 1216 | if (rt->dst.error) |
| 1217 | break; |
| 1218 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1219 | continue; |
| 1220 | if (fl6->flowi6_oif != rt->dst.dev->ifindex) |
| 1221 | continue; |
| 1222 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
| 1223 | continue; |
| 1224 | break; |
| 1225 | } |
| 1226 | |
| 1227 | if (!rt) |
| 1228 | rt = net->ipv6.ip6_null_entry; |
| 1229 | else if (rt->dst.error) { |
| 1230 | rt = net->ipv6.ip6_null_entry; |
| 1231 | goto out; |
| 1232 | } |
| 1233 | BACKTRACK(net, &fl6->saddr); |
| 1234 | out: |
| 1235 | dst_hold(&rt->dst); |
| 1236 | |
| 1237 | read_unlock_bh(&table->tb6_lock); |
| 1238 | |
| 1239 | return rt; |
| 1240 | }; |
| 1241 | |
| 1242 | static struct dst_entry *ip6_route_redirect(struct net *net, |
| 1243 | const struct flowi6 *fl6, |
| 1244 | const struct in6_addr *gateway) |
| 1245 | { |
| 1246 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
| 1247 | struct ip6rd_flowi rdfl; |
| 1248 | |
| 1249 | rdfl.fl6 = *fl6; |
| 1250 | rdfl.gateway = *gateway; |
| 1251 | |
| 1252 | return fib6_rule_lookup(net, &rdfl.fl6, |
| 1253 | flags, __ip6_route_redirect); |
| 1254 | } |
| 1255 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1256 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark) |
| 1257 | { |
| 1258 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; |
| 1259 | struct dst_entry *dst; |
| 1260 | struct flowi6 fl6; |
| 1261 | |
| 1262 | memset(&fl6, 0, sizeof(fl6)); |
| 1263 | fl6.flowi6_oif = oif; |
| 1264 | fl6.flowi6_mark = mark; |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1265 | fl6.daddr = iph->daddr; |
| 1266 | fl6.saddr = iph->saddr; |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 1267 | fl6.flowlabel = ip6_flowinfo(iph); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1268 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1269 | dst = ip6_route_redirect(net, &fl6, &ipv6_hdr(skb)->saddr); |
| 1270 | rt6_do_redirect(dst, NULL, skb); |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1271 | dst_release(dst); |
| 1272 | } |
| 1273 | EXPORT_SYMBOL_GPL(ip6_redirect); |
| 1274 | |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1275 | void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, |
| 1276 | u32 mark) |
| 1277 | { |
| 1278 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
| 1279 | const struct rd_msg *msg = (struct rd_msg *)icmp6_hdr(skb); |
| 1280 | struct dst_entry *dst; |
| 1281 | struct flowi6 fl6; |
| 1282 | |
| 1283 | memset(&fl6, 0, sizeof(fl6)); |
| 1284 | fl6.flowi6_oif = oif; |
| 1285 | fl6.flowi6_mark = mark; |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1286 | fl6.daddr = msg->dest; |
| 1287 | fl6.saddr = iph->daddr; |
| 1288 | |
Duan Jiong | b55b76b | 2013-09-04 19:44:21 +0800 | [diff] [blame] | 1289 | dst = ip6_route_redirect(net, &fl6, &iph->saddr); |
| 1290 | rt6_do_redirect(dst, NULL, skb); |
Duan Jiong | c92a59e | 2013-08-22 12:07:35 +0800 | [diff] [blame] | 1291 | dst_release(dst); |
| 1292 | } |
| 1293 | |
David S. Miller | 3a5ad2e | 2012-07-12 00:08:07 -0700 | [diff] [blame] | 1294 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk) |
| 1295 | { |
| 1296 | ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark); |
| 1297 | } |
| 1298 | EXPORT_SYMBOL_GPL(ip6_sk_redirect); |
| 1299 | |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1300 | static unsigned int ip6_default_advmss(const struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | { |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1302 | struct net_device *dev = dst->dev; |
| 1303 | unsigned int mtu = dst_mtu(dst); |
| 1304 | struct net *net = dev_net(dev); |
| 1305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 1307 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1308 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 1309 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | |
| 1311 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1312 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 1313 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 1314 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | * rely only on pmtu discovery" |
| 1316 | */ |
| 1317 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 1318 | mtu = IPV6_MAXPLEN; |
| 1319 | return mtu; |
| 1320 | } |
| 1321 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 1322 | static unsigned int ip6_mtu(const struct dst_entry *dst) |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1323 | { |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1324 | struct inet6_dev *idev; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1325 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 1326 | |
| 1327 | if (mtu) |
| 1328 | return mtu; |
| 1329 | |
| 1330 | mtu = IPV6_MIN_MTU; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1331 | |
| 1332 | rcu_read_lock(); |
| 1333 | idev = __in6_dev_get(dst->dev); |
| 1334 | if (idev) |
| 1335 | mtu = idev->cnf.mtu6; |
| 1336 | rcu_read_unlock(); |
| 1337 | |
| 1338 | return mtu; |
| 1339 | } |
| 1340 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1341 | static struct dst_entry *icmp6_dst_gc_list; |
| 1342 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1343 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1344 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1345 | struct flowi6 *fl6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | { |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1347 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | struct rt6_info *rt; |
| 1349 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1350 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1352 | if (unlikely(!idev)) |
Eric Dumazet | 122bdf6 | 2012-03-14 21:13:11 +0000 | [diff] [blame] | 1353 | return ERR_PTR(-ENODEV); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 1355 | rt = ip6_dst_alloc(net, dev, 0, NULL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1356 | if (unlikely(!rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | in6_dev_put(idev); |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1358 | dst = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | goto out; |
| 1360 | } |
| 1361 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1362 | rt->dst.flags |= DST_HOST; |
| 1363 | rt->dst.output = ip6_output; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1364 | atomic_set(&rt->dst.__refcnt, 1); |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 1365 | rt->rt6i_gateway = fl6->daddr; |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1366 | rt->rt6i_dst.addr = fl6->daddr; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1367 | rt->rt6i_dst.plen = 128; |
| 1368 | rt->rt6i_idev = idev; |
Li RongQing | 14edd87 | 2012-10-24 14:01:18 +0800 | [diff] [blame] | 1369 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1371 | spin_lock_bh(&icmp6_dst_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1372 | rt->dst.next = icmp6_dst_gc_list; |
| 1373 | icmp6_dst_gc_list = &rt->dst; |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1374 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1376 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1378 | dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0); |
| 1379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | out: |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1381 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | } |
| 1383 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1384 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | { |
Hagen Paul Pfeifer | e9476e9 | 2011-02-25 05:45:19 +0000 | [diff] [blame] | 1386 | struct dst_entry *dst, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1387 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1389 | spin_lock_bh(&icmp6_dst_lock); |
| 1390 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | while ((dst = *pprev) != NULL) { |
| 1393 | if (!atomic_read(&dst->__refcnt)) { |
| 1394 | *pprev = dst->next; |
| 1395 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | } else { |
| 1397 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1398 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | } |
| 1400 | } |
| 1401 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1402 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1403 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1404 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | } |
| 1406 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1407 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1408 | void *arg) |
| 1409 | { |
| 1410 | struct dst_entry *dst, **pprev; |
| 1411 | |
| 1412 | spin_lock_bh(&icmp6_dst_lock); |
| 1413 | pprev = &icmp6_dst_gc_list; |
| 1414 | while ((dst = *pprev) != NULL) { |
| 1415 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1416 | if (func(rt, arg)) { |
| 1417 | *pprev = dst->next; |
| 1418 | dst_free(dst); |
| 1419 | } else { |
| 1420 | pprev = &dst->next; |
| 1421 | } |
| 1422 | } |
| 1423 | spin_unlock_bh(&icmp6_dst_lock); |
| 1424 | } |
| 1425 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1426 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | { |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1428 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1429 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1430 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1431 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1432 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1433 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1434 | int entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1436 | entries = dst_entries_get_fast(ops); |
Michal Kubeček | 49a18d8 | 2013-08-01 10:04:24 +0200 | [diff] [blame] | 1437 | if (time_after(rt_last_gc + rt_min_interval, jiffies) && |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1438 | entries <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | goto out; |
| 1440 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1441 | net->ipv6.ip6_rt_gc_expire++; |
Michal Kubeček | 2ac3ac8 | 2013-08-01 10:04:14 +0200 | [diff] [blame] | 1442 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net, entries > rt_max_size); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1443 | entries = dst_entries_get_slow(ops); |
| 1444 | if (entries < ops->gc_thresh) |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1445 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1447 | 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] | 1448 | return entries > rt_max_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | } |
| 1450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | /* |
| 1452 | * |
| 1453 | */ |
| 1454 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1455 | int ip6_route_add(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | { |
| 1457 | int err; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1458 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | struct rt6_info *rt = NULL; |
| 1460 | struct net_device *dev = NULL; |
| 1461 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1462 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | int addr_type; |
| 1464 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1465 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | return -EINVAL; |
| 1467 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1468 | if (cfg->fc_src_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | return -EINVAL; |
| 1470 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1471 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1473 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | if (!dev) |
| 1475 | goto out; |
| 1476 | idev = in6_dev_get(dev); |
| 1477 | if (!idev) |
| 1478 | goto out; |
| 1479 | } |
| 1480 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1481 | if (cfg->fc_metric == 0) |
| 1482 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1484 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1485 | if (cfg->fc_nlinfo.nlh && |
| 1486 | !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) { |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1487 | table = fib6_get_table(net, cfg->fc_table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1488 | if (!table) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1489 | 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] | 1490 | table = fib6_new_table(net, cfg->fc_table); |
| 1491 | } |
| 1492 | } else { |
| 1493 | table = fib6_new_table(net, cfg->fc_table); |
| 1494 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1495 | |
| 1496 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1497 | goto out; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1498 | |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 1499 | rt = ip6_dst_alloc(net, NULL, DST_NOCOUNT, table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1501 | if (!rt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | err = -ENOMEM; |
| 1503 | goto out; |
| 1504 | } |
| 1505 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1506 | if (cfg->fc_flags & RTF_EXPIRES) |
| 1507 | rt6_set_expires(rt, jiffies + |
| 1508 | clock_t_to_jiffies(cfg->fc_expires)); |
| 1509 | else |
| 1510 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1512 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1513 | cfg->fc_protocol = RTPROT_BOOT; |
| 1514 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1515 | |
| 1516 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | |
| 1518 | if (addr_type & IPV6_ADDR_MULTICAST) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1519 | rt->dst.input = ip6_mc_input; |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 1520 | else if (cfg->fc_flags & RTF_LOCAL) |
| 1521 | rt->dst.input = ip6_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | else |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1523 | rt->dst.input = ip6_forward; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1525 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1527 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1528 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | if (rt->rt6i_dst.plen == 128) |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 1530 | rt->dst.flags |= DST_HOST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1532 | if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) { |
| 1533 | u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL); |
| 1534 | if (!metrics) { |
| 1535 | err = -ENOMEM; |
| 1536 | goto out; |
| 1537 | } |
| 1538 | dst_init_metrics(&rt->dst, metrics, 0); |
| 1539 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1541 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1542 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | #endif |
| 1544 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1545 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | |
| 1547 | /* We cannot add true routes via loopback here, |
| 1548 | they would result in kernel looping; promote them to reject routes |
| 1549 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1550 | if ((cfg->fc_flags & RTF_REJECT) || |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1551 | (dev && (dev->flags & IFF_LOOPBACK) && |
| 1552 | !(addr_type & IPV6_ADDR_LOOPBACK) && |
| 1553 | !(cfg->fc_flags & RTF_LOCAL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1555 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | if (dev) { |
| 1557 | dev_put(dev); |
| 1558 | in6_dev_put(idev); |
| 1559 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1560 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | dev_hold(dev); |
| 1562 | idev = in6_dev_get(dev); |
| 1563 | if (!idev) { |
| 1564 | err = -ENODEV; |
| 1565 | goto out; |
| 1566 | } |
| 1567 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1568 | rt->dst.output = ip6_pkt_discard_out; |
| 1569 | rt->dst.input = ip6_pkt_discard; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1571 | switch (cfg->fc_type) { |
| 1572 | case RTN_BLACKHOLE: |
| 1573 | rt->dst.error = -EINVAL; |
| 1574 | break; |
| 1575 | case RTN_PROHIBIT: |
| 1576 | rt->dst.error = -EACCES; |
| 1577 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 1578 | case RTN_THROW: |
| 1579 | rt->dst.error = -EAGAIN; |
| 1580 | break; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 1581 | default: |
| 1582 | rt->dst.error = -ENETUNREACH; |
| 1583 | break; |
| 1584 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | goto install_route; |
| 1586 | } |
| 1587 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1588 | if (cfg->fc_flags & RTF_GATEWAY) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1589 | const struct in6_addr *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | int gwa_type; |
| 1591 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1592 | gw_addr = &cfg->fc_gateway; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1593 | rt->rt6i_gateway = *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | gwa_type = ipv6_addr_type(gw_addr); |
| 1595 | |
| 1596 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1597 | struct rt6_info *grt; |
| 1598 | |
| 1599 | /* IPv6 strictly inhibits using not link-local |
| 1600 | addresses as nexthop address. |
| 1601 | Otherwise, router will not able to send redirects. |
| 1602 | It is very good, but in some (rare!) circumstances |
| 1603 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1604 | some exceptions. --ANK |
| 1605 | */ |
| 1606 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1607 | if (!(gwa_type & IPV6_ADDR_UNICAST)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | goto out; |
| 1609 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1610 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
| 1612 | err = -EHOSTUNREACH; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1613 | if (!grt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | goto out; |
| 1615 | if (dev) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1616 | if (dev != grt->dst.dev) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1617 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | goto out; |
| 1619 | } |
| 1620 | } else { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1621 | dev = grt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | idev = grt->rt6i_idev; |
| 1623 | dev_hold(dev); |
| 1624 | in6_dev_hold(grt->rt6i_idev); |
| 1625 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1626 | if (!(grt->rt6i_flags & RTF_GATEWAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | err = 0; |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1628 | ip6_rt_put(grt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | if (err) |
| 1631 | goto out; |
| 1632 | } |
| 1633 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1634 | if (!dev || (dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | goto out; |
| 1636 | } |
| 1637 | |
| 1638 | err = -ENODEV; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1639 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | goto out; |
| 1641 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1642 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) { |
| 1643 | if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { |
| 1644 | err = -EINVAL; |
| 1645 | goto out; |
| 1646 | } |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1647 | rt->rt6i_prefsrc.addr = cfg->fc_prefsrc; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1648 | rt->rt6i_prefsrc.plen = 128; |
| 1649 | } else |
| 1650 | rt->rt6i_prefsrc.plen = 0; |
| 1651 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1652 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | |
| 1654 | install_route: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1655 | if (cfg->fc_mx) { |
| 1656 | struct nlattr *nla; |
| 1657 | int remaining; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1659 | nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) { |
Thomas Graf | 8f4c1f9 | 2007-09-12 14:44:36 +0200 | [diff] [blame] | 1660 | int type = nla_type(nla); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1661 | |
| 1662 | if (type) { |
| 1663 | if (type > RTAX_MAX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | err = -EINVAL; |
| 1665 | goto out; |
| 1666 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1667 | |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1668 | dst_metric_set(&rt->dst, type, nla_get_u32(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | } |
| 1671 | } |
| 1672 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1673 | rt->dst.dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1675 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1676 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1677 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1678 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1679 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | |
| 1681 | out: |
| 1682 | if (dev) |
| 1683 | dev_put(dev); |
| 1684 | if (idev) |
| 1685 | in6_dev_put(idev); |
| 1686 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1687 | dst_free(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | return err; |
| 1689 | } |
| 1690 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1691 | 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] | 1692 | { |
| 1693 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1694 | struct fib6_table *table; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1695 | struct net *net = dev_net(rt->dst.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 1697 | if (rt == net->ipv6.ip6_null_entry) { |
| 1698 | err = -ENOENT; |
| 1699 | goto out; |
| 1700 | } |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 1701 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1702 | table = rt->rt6i_table; |
| 1703 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1704 | err = fib6_del(rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1705 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | |
Gao feng | 6825a26 | 2012-09-19 19:25:34 +0000 | [diff] [blame] | 1707 | out: |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1708 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | return err; |
| 1710 | } |
| 1711 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1712 | int ip6_del_rt(struct rt6_info *rt) |
| 1713 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1714 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1715 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1716 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 1717 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1718 | } |
| 1719 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1720 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1722 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | struct fib6_node *fn; |
| 1724 | struct rt6_info *rt; |
| 1725 | int err = -ESRCH; |
| 1726 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1727 | 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] | 1728 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1729 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1731 | read_lock_bh(&table->tb6_lock); |
| 1732 | |
| 1733 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1734 | &cfg->fc_dst, cfg->fc_dst_len, |
| 1735 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | if (fn) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1738 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1739 | if (cfg->fc_ifindex && |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1740 | (!rt->dst.dev || |
| 1741 | rt->dst.dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1743 | if (cfg->fc_flags & RTF_GATEWAY && |
| 1744 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1746 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1748 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1749 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1751 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | } |
| 1753 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1754 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
| 1756 | return err; |
| 1757 | } |
| 1758 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 1759 | 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] | 1760 | { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1761 | struct net *net = dev_net(skb->dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1762 | struct netevent_redirect netevent; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1763 | struct rt6_info *rt, *nrt = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1764 | struct ndisc_options ndopts; |
| 1765 | struct inet6_dev *in6_dev; |
| 1766 | struct neighbour *neigh; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1767 | struct rd_msg *msg; |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1768 | int optlen, on_link; |
| 1769 | u8 *lladdr; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1770 | |
Simon Horman | 29a3cad | 2013-05-28 20:34:26 +0000 | [diff] [blame] | 1771 | 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] | 1772 | optlen -= sizeof(*msg); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1773 | |
| 1774 | if (optlen < 0) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1775 | net_dbg_ratelimited("rt6_do_redirect: packet too short\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1776 | return; |
| 1777 | } |
| 1778 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1779 | msg = (struct rd_msg *)icmp6_hdr(skb); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1780 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1781 | if (ipv6_addr_is_multicast(&msg->dest)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1782 | net_dbg_ratelimited("rt6_do_redirect: destination address is multicast\n"); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1783 | return; |
| 1784 | } |
| 1785 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1786 | on_link = 0; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1787 | if (ipv6_addr_equal(&msg->dest, &msg->target)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1788 | on_link = 1; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1789 | } else if (ipv6_addr_type(&msg->target) != |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1790 | (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1791 | 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] | 1792 | return; |
| 1793 | } |
| 1794 | |
| 1795 | in6_dev = __in6_dev_get(skb->dev); |
| 1796 | if (!in6_dev) |
| 1797 | return; |
| 1798 | if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects) |
| 1799 | return; |
| 1800 | |
| 1801 | /* RFC2461 8.1: |
| 1802 | * The IP source address of the Redirect MUST be the same as the current |
| 1803 | * first-hop router for the specified ICMP Destination Address. |
| 1804 | */ |
| 1805 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1806 | if (!ndisc_parse_options(msg->opt, optlen, &ndopts)) { |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1807 | net_dbg_ratelimited("rt6_redirect: invalid ND options\n"); |
| 1808 | return; |
| 1809 | } |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1810 | |
| 1811 | lladdr = NULL; |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1812 | if (ndopts.nd_opts_tgt_lladdr) { |
| 1813 | lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, |
| 1814 | skb->dev); |
| 1815 | if (!lladdr) { |
| 1816 | net_dbg_ratelimited("rt6_redirect: invalid link-layer address length\n"); |
| 1817 | return; |
| 1818 | } |
| 1819 | } |
| 1820 | |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1821 | rt = (struct rt6_info *) dst; |
| 1822 | if (rt == net->ipv6.ip6_null_entry) { |
| 1823 | net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n"); |
| 1824 | return; |
| 1825 | } |
| 1826 | |
| 1827 | /* Redirect received -> path was valid. |
| 1828 | * Look, redirects are sent only in response to data packets, |
| 1829 | * so that this nexthop apparently is reachable. --ANK |
| 1830 | */ |
| 1831 | dst_confirm(&rt->dst); |
| 1832 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1833 | neigh = __neigh_lookup(&nd_tbl, &msg->target, skb->dev, 1); |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1834 | if (!neigh) |
| 1835 | return; |
| 1836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | /* |
| 1838 | * We have finally decided to accept it. |
| 1839 | */ |
| 1840 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1841 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 1843 | NEIGH_UPDATE_F_OVERRIDE| |
| 1844 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 1845 | NEIGH_UPDATE_F_ISROUTER)) |
| 1846 | ); |
| 1847 | |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1848 | nrt = ip6_rt_copy(rt, &msg->dest); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1849 | if (!nrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | goto out; |
| 1851 | |
| 1852 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 1853 | if (on_link) |
| 1854 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 1855 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1856 | nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1858 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | goto out; |
| 1860 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1861 | netevent.old = &rt->dst; |
| 1862 | netevent.new = &nrt->dst; |
YOSHIFUJI Hideaki / 吉藤英明 | 71bcdba | 2013-01-05 16:34:51 +0000 | [diff] [blame] | 1863 | netevent.daddr = &msg->dest; |
YOSHIFUJI Hideaki / 吉藤英明 | 6059283 | 2013-01-14 09:28:27 +0000 | [diff] [blame] | 1864 | netevent.neigh = neigh; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 1865 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 1866 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1867 | if (rt->rt6i_flags & RTF_CACHE) { |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1868 | rt = (struct rt6_info *) dst_clone(&rt->dst); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1869 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | } |
| 1871 | |
| 1872 | out: |
David S. Miller | e8599ff | 2012-07-11 23:43:53 -0700 | [diff] [blame] | 1873 | neigh_release(neigh); |
David S. Miller | 6e157b6 | 2012-07-12 00:05:02 -0700 | [diff] [blame] | 1874 | } |
| 1875 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | * Misc support functions |
| 1878 | */ |
| 1879 | |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1880 | static struct rt6_info *ip6_rt_copy(struct rt6_info *ort, |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 1881 | const struct in6_addr *dest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1883 | struct net *net = dev_net(ort->dst.dev); |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 1884 | struct rt6_info *rt = ip6_dst_alloc(net, ort->dst.dev, 0, |
| 1885 | ort->rt6i_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | |
| 1887 | if (rt) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1888 | rt->dst.input = ort->dst.input; |
| 1889 | rt->dst.output = ort->dst.output; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1890 | rt->dst.flags |= DST_HOST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1892 | rt->rt6i_dst.addr = *dest; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1893 | rt->rt6i_dst.plen = 128; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1894 | dst_copy_metrics(&rt->dst, &ort->dst); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1895 | rt->dst.error = ort->dst.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | rt->rt6i_idev = ort->rt6i_idev; |
| 1897 | if (rt->rt6i_idev) |
| 1898 | in6_dev_hold(rt->rt6i_idev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1899 | rt->dst.lastuse = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 1901 | if (ort->rt6i_flags & RTF_GATEWAY) |
| 1902 | rt->rt6i_gateway = ort->rt6i_gateway; |
| 1903 | else |
| 1904 | rt->rt6i_gateway = *dest; |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1905 | rt->rt6i_flags = ort->rt6i_flags; |
| 1906 | if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) == |
| 1907 | (RTF_DEFAULT | RTF_ADDRCONF)) |
| 1908 | rt6_set_from(rt, ort); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | rt->rt6i_metric = 0; |
| 1910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | #ifdef CONFIG_IPV6_SUBTREES |
| 1912 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1913 | #endif |
Florian Westphal | 0f6c639 | 2011-05-20 11:27:24 +0000 | [diff] [blame] | 1914 | memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1915 | rt->rt6i_table = ort->rt6i_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | } |
| 1917 | return rt; |
| 1918 | } |
| 1919 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1920 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1921 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1922 | const struct in6_addr *prefix, int prefixlen, |
| 1923 | const struct in6_addr *gwaddr, int ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1924 | { |
| 1925 | struct fib6_node *fn; |
| 1926 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1927 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1928 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1929 | table = fib6_get_table(net, RT6_TABLE_INFO); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1930 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1931 | return NULL; |
| 1932 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 1933 | read_lock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1934 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1935 | if (!fn) |
| 1936 | goto out; |
| 1937 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1938 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1939 | if (rt->dst.dev->ifindex != ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1940 | continue; |
| 1941 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 1942 | continue; |
| 1943 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 1944 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1945 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1946 | break; |
| 1947 | } |
| 1948 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 1949 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1950 | return rt; |
| 1951 | } |
| 1952 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1953 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1954 | const struct in6_addr *prefix, int prefixlen, |
| 1955 | const struct in6_addr *gwaddr, int ifindex, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1956 | unsigned int pref) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1957 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1958 | struct fib6_config cfg = { |
| 1959 | .fc_table = RT6_TABLE_INFO, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1960 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1961 | .fc_ifindex = ifindex, |
| 1962 | .fc_dst_len = prefixlen, |
| 1963 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 1964 | RTF_UP | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1965 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1966 | .fc_nlinfo.nlh = NULL, |
| 1967 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1968 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1969 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1970 | cfg.fc_dst = *prefix; |
| 1971 | cfg.fc_gateway = *gwaddr; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1972 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 1973 | /* We should treat it as a default route if prefix length is 0. */ |
| 1974 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1975 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1976 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1977 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1978 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1979 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1980 | } |
| 1981 | #endif |
| 1982 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1983 | 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] | 1984 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1986 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1988 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1989 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1990 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 1992 | read_lock_bh(&table->tb6_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1993 | 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] | 1994 | if (dev == rt->dst.dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 1995 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 1997 | break; |
| 1998 | } |
| 1999 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2000 | dst_hold(&rt->dst); |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2001 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | return rt; |
| 2003 | } |
| 2004 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2005 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 2006 | struct net_device *dev, |
| 2007 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2009 | struct fib6_config cfg = { |
| 2010 | .fc_table = RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 2011 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2012 | .fc_ifindex = dev->ifindex, |
| 2013 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 2014 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2015 | .fc_nlinfo.portid = 0, |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2016 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2017 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2018 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2020 | cfg.fc_gateway = *gwaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2022 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | return rt6_get_dflt_router(gwaddr, dev); |
| 2025 | } |
| 2026 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 2027 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | { |
| 2029 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2030 | struct fib6_table *table; |
| 2031 | |
| 2032 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 2033 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2034 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2035 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | |
| 2037 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2038 | read_lock_bh(&table->tb6_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2039 | for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) { |
Lorenzo Colitti | 3e8b0ac | 2013-03-03 20:46:46 +0000 | [diff] [blame] | 2040 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) && |
| 2041 | (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2042 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2043 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 2044 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | goto restart; |
| 2046 | } |
| 2047 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2048 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | } |
| 2050 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2051 | static void rtmsg_to_fib6_config(struct net *net, |
| 2052 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2053 | struct fib6_config *cfg) |
| 2054 | { |
| 2055 | memset(cfg, 0, sizeof(*cfg)); |
| 2056 | |
| 2057 | cfg->fc_table = RT6_TABLE_MAIN; |
| 2058 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 2059 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 2060 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 2061 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 2062 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 2063 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 2064 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2065 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 2066 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2067 | cfg->fc_dst = rtmsg->rtmsg_dst; |
| 2068 | cfg->fc_src = rtmsg->rtmsg_src; |
| 2069 | cfg->fc_gateway = rtmsg->rtmsg_gateway; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2070 | } |
| 2071 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2072 | 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] | 2073 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2074 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | struct in6_rtmsg rtmsg; |
| 2076 | int err; |
| 2077 | |
| 2078 | switch(cmd) { |
| 2079 | case SIOCADDRT: /* Add a route */ |
| 2080 | case SIOCDELRT: /* Delete a route */ |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2081 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | return -EPERM; |
| 2083 | err = copy_from_user(&rtmsg, arg, |
| 2084 | sizeof(struct in6_rtmsg)); |
| 2085 | if (err) |
| 2086 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2087 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2088 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | rtnl_lock(); |
| 2091 | switch (cmd) { |
| 2092 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2093 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | break; |
| 2095 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2096 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | break; |
| 2098 | default: |
| 2099 | err = -EINVAL; |
| 2100 | } |
| 2101 | rtnl_unlock(); |
| 2102 | |
| 2103 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2104 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | |
| 2106 | return -EINVAL; |
| 2107 | } |
| 2108 | |
| 2109 | /* |
| 2110 | * Drop the packet on the floor |
| 2111 | */ |
| 2112 | |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 2113 | 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] | 2114 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2115 | int type; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2116 | struct dst_entry *dst = skb_dst(skb); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2117 | switch (ipstats_mib_noroutes) { |
| 2118 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 2119 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 2120 | if (type == IPV6_ADDR_ANY) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2121 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2122 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2123 | break; |
| 2124 | } |
| 2125 | /* FALLTHROUGH */ |
| 2126 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2127 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2128 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2129 | break; |
| 2130 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 2131 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | kfree_skb(skb); |
| 2133 | return 0; |
| 2134 | } |
| 2135 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2136 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 2137 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2138 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2139 | } |
| 2140 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2141 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2143 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2144 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | } |
| 2146 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 2147 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2148 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2149 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 2150 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2151 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2152 | } |
| 2153 | |
| 2154 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) |
| 2155 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2156 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2157 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2158 | } |
| 2159 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 2160 | #endif |
| 2161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | /* |
| 2163 | * Allocate a dst for local (unicast / anycast) address. |
| 2164 | */ |
| 2165 | |
| 2166 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 2167 | const struct in6_addr *addr, |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 2168 | bool anycast) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2170 | struct net *net = dev_net(idev->dev); |
David S. Miller | 8b96d22 | 2012-06-11 02:01:56 -0700 | [diff] [blame] | 2171 | struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2173 | if (!rt) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 2174 | net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | return ERR_PTR(-ENOMEM); |
Ben Greear | 4038565 | 2010-11-08 12:33:48 +0000 | [diff] [blame] | 2176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | in6_dev_hold(idev); |
| 2179 | |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 2180 | rt->dst.flags |= DST_HOST; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2181 | rt->dst.input = ip6_input; |
| 2182 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | rt->rt6i_idev = idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | |
| 2185 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 2186 | if (anycast) |
| 2187 | rt->rt6i_flags |= RTF_ANYCAST; |
| 2188 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | rt->rt6i_flags |= RTF_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | |
Julian Anastasov | 550bab4 | 2013-10-20 15:43:04 +0300 | [diff] [blame] | 2191 | rt->rt6i_gateway = *addr; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2192 | rt->rt6i_dst.addr = *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | rt->rt6i_dst.plen = 128; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2194 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2196 | atomic_set(&rt->dst.__refcnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | |
| 2198 | return rt; |
| 2199 | } |
| 2200 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2201 | int ip6_route_get_saddr(struct net *net, |
| 2202 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2203 | const struct in6_addr *daddr, |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2204 | unsigned int prefs, |
| 2205 | struct in6_addr *saddr) |
| 2206 | { |
| 2207 | struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt); |
| 2208 | int err = 0; |
| 2209 | if (rt->rt6i_prefsrc.plen) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2210 | *saddr = rt->rt6i_prefsrc.addr; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2211 | else |
| 2212 | err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
| 2213 | daddr, prefs, saddr); |
| 2214 | return err; |
| 2215 | } |
| 2216 | |
| 2217 | /* remove deleted ip from prefsrc entries */ |
| 2218 | struct arg_dev_net_ip { |
| 2219 | struct net_device *dev; |
| 2220 | struct net *net; |
| 2221 | struct in6_addr *addr; |
| 2222 | }; |
| 2223 | |
| 2224 | static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) |
| 2225 | { |
| 2226 | struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; |
| 2227 | struct net *net = ((struct arg_dev_net_ip *)arg)->net; |
| 2228 | struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; |
| 2229 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2230 | if (((void *)rt->dst.dev == dev || !dev) && |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2231 | rt != net->ipv6.ip6_null_entry && |
| 2232 | ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { |
| 2233 | /* remove prefsrc entry */ |
| 2234 | rt->rt6i_prefsrc.plen = 0; |
| 2235 | } |
| 2236 | return 0; |
| 2237 | } |
| 2238 | |
| 2239 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) |
| 2240 | { |
| 2241 | struct net *net = dev_net(ifp->idev->dev); |
| 2242 | struct arg_dev_net_ip adni = { |
| 2243 | .dev = ifp->idev->dev, |
| 2244 | .net = net, |
| 2245 | .addr = &ifp->addr, |
| 2246 | }; |
| 2247 | fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni); |
| 2248 | } |
| 2249 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2250 | struct arg_dev_net { |
| 2251 | struct net_device *dev; |
| 2252 | struct net *net; |
| 2253 | }; |
| 2254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 2256 | { |
stephen hemminger | bc3ef66 | 2010-12-16 17:42:40 +0000 | [diff] [blame] | 2257 | const struct arg_dev_net *adn = arg; |
| 2258 | const struct net_device *dev = adn->dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2259 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2260 | if ((rt->dst.dev == dev || !dev) && |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2261 | rt != adn->net->ipv6.ip6_null_entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | return -1; |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | return 0; |
| 2265 | } |
| 2266 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2267 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2269 | struct arg_dev_net adn = { |
| 2270 | .dev = dev, |
| 2271 | .net = net, |
| 2272 | }; |
| 2273 | |
| 2274 | fib6_clean_all(net, fib6_ifdown, 0, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 2275 | icmp6_clean_all(fib6_ifdown, &adn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | } |
| 2277 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2278 | struct rt6_mtu_change_arg { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | struct net_device *dev; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2280 | unsigned int mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | }; |
| 2282 | |
| 2283 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 2284 | { |
| 2285 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 2286 | struct inet6_dev *idev; |
| 2287 | |
| 2288 | /* In IPv6 pmtu discovery is not optional, |
| 2289 | so that RTAX_MTU lock cannot disable it. |
| 2290 | We still use this lock to block changes |
| 2291 | caused by addrconf/ndisc. |
| 2292 | */ |
| 2293 | |
| 2294 | idev = __in6_dev_get(arg->dev); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2295 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | return 0; |
| 2297 | |
| 2298 | /* For administrative MTU increase, there is no way to discover |
| 2299 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 2300 | Since RFC 1981 doesn't include administrative MTU increase |
| 2301 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 2302 | */ |
| 2303 | /* |
| 2304 | If new MTU is less than route PMTU, this new MTU will be the |
| 2305 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 2306 | decreases; if new MTU is greater than route PMTU, and the |
| 2307 | old MTU is the lowest MTU in the path, update the route PMTU |
| 2308 | to reflect the increase. In this case if the other nodes' MTU |
| 2309 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 2310 | PMTU discouvery. |
| 2311 | */ |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2312 | if (rt->dst.dev == arg->dev && |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2313 | !dst_metric_locked(&rt->dst, RTAX_MTU) && |
| 2314 | (dst_mtu(&rt->dst) >= arg->mtu || |
| 2315 | (dst_mtu(&rt->dst) < arg->mtu && |
| 2316 | dst_mtu(&rt->dst) == idev->cnf.mtu6))) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2317 | dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu); |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | return 0; |
| 2320 | } |
| 2321 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2322 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2324 | struct rt6_mtu_change_arg arg = { |
| 2325 | .dev = dev, |
| 2326 | .mtu = mtu, |
| 2327 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2329 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | } |
| 2331 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2332 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2333 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2334 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2335 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2336 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2337 | [RTA_METRICS] = { .type = NLA_NESTED }, |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2338 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2339 | }; |
| 2340 | |
| 2341 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2342 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2344 | struct rtmsg *rtm; |
| 2345 | struct nlattr *tb[RTA_MAX+1]; |
| 2346 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2348 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2349 | if (err < 0) |
| 2350 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2352 | err = -EINVAL; |
| 2353 | rtm = nlmsg_data(nlh); |
| 2354 | memset(cfg, 0, sizeof(*cfg)); |
| 2355 | |
| 2356 | cfg->fc_table = rtm->rtm_table; |
| 2357 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2358 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2359 | cfg->fc_flags = RTF_UP; |
| 2360 | cfg->fc_protocol = rtm->rtm_protocol; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2361 | cfg->fc_type = rtm->rtm_type; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2362 | |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2363 | if (rtm->rtm_type == RTN_UNREACHABLE || |
| 2364 | rtm->rtm_type == RTN_BLACKHOLE || |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 2365 | rtm->rtm_type == RTN_PROHIBIT || |
| 2366 | rtm->rtm_type == RTN_THROW) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2367 | cfg->fc_flags |= RTF_REJECT; |
| 2368 | |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2369 | if (rtm->rtm_type == RTN_LOCAL) |
| 2370 | cfg->fc_flags |= RTF_LOCAL; |
| 2371 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2372 | cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2373 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2374 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2375 | |
| 2376 | if (tb[RTA_GATEWAY]) { |
| 2377 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); |
| 2378 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2380 | |
| 2381 | if (tb[RTA_DST]) { |
| 2382 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2383 | |
| 2384 | if (nla_len(tb[RTA_DST]) < plen) |
| 2385 | goto errout; |
| 2386 | |
| 2387 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2389 | |
| 2390 | if (tb[RTA_SRC]) { |
| 2391 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2392 | |
| 2393 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2394 | goto errout; |
| 2395 | |
| 2396 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2398 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2399 | if (tb[RTA_PREFSRC]) |
| 2400 | nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16); |
| 2401 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2402 | if (tb[RTA_OIF]) |
| 2403 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2404 | |
| 2405 | if (tb[RTA_PRIORITY]) |
| 2406 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2407 | |
| 2408 | if (tb[RTA_METRICS]) { |
| 2409 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2410 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2412 | |
| 2413 | if (tb[RTA_TABLE]) |
| 2414 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2415 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2416 | if (tb[RTA_MULTIPATH]) { |
| 2417 | cfg->fc_mp = nla_data(tb[RTA_MULTIPATH]); |
| 2418 | cfg->fc_mp_len = nla_len(tb[RTA_MULTIPATH]); |
| 2419 | } |
| 2420 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2421 | err = 0; |
| 2422 | errout: |
| 2423 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | } |
| 2425 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2426 | static int ip6_route_multipath(struct fib6_config *cfg, int add) |
| 2427 | { |
| 2428 | struct fib6_config r_cfg; |
| 2429 | struct rtnexthop *rtnh; |
| 2430 | int remaining; |
| 2431 | int attrlen; |
| 2432 | int err = 0, last_err = 0; |
| 2433 | |
| 2434 | beginning: |
| 2435 | rtnh = (struct rtnexthop *)cfg->fc_mp; |
| 2436 | remaining = cfg->fc_mp_len; |
| 2437 | |
| 2438 | /* Parse a Multipath Entry */ |
| 2439 | while (rtnh_ok(rtnh, remaining)) { |
| 2440 | memcpy(&r_cfg, cfg, sizeof(*cfg)); |
| 2441 | if (rtnh->rtnh_ifindex) |
| 2442 | r_cfg.fc_ifindex = rtnh->rtnh_ifindex; |
| 2443 | |
| 2444 | attrlen = rtnh_attrlen(rtnh); |
| 2445 | if (attrlen > 0) { |
| 2446 | struct nlattr *nla, *attrs = rtnh_attrs(rtnh); |
| 2447 | |
| 2448 | nla = nla_find(attrs, attrlen, RTA_GATEWAY); |
| 2449 | if (nla) { |
| 2450 | nla_memcpy(&r_cfg.fc_gateway, nla, 16); |
| 2451 | r_cfg.fc_flags |= RTF_GATEWAY; |
| 2452 | } |
| 2453 | } |
| 2454 | err = add ? ip6_route_add(&r_cfg) : ip6_route_del(&r_cfg); |
| 2455 | if (err) { |
| 2456 | last_err = err; |
| 2457 | /* If we are trying to remove a route, do not stop the |
| 2458 | * loop when ip6_route_del() fails (because next hop is |
| 2459 | * already gone), we should try to remove all next hops. |
| 2460 | */ |
| 2461 | if (add) { |
| 2462 | /* If add fails, we should try to delete all |
| 2463 | * next hops that have been already added. |
| 2464 | */ |
| 2465 | add = 0; |
| 2466 | goto beginning; |
| 2467 | } |
| 2468 | } |
Nicolas Dichtel | 1a72418 | 2012-11-01 22:58:22 +0000 | [diff] [blame] | 2469 | /* Because each route is added like a single route we remove |
| 2470 | * this flag after the first nexthop (if there is a collision, |
| 2471 | * we have already fail to add the first nexthop: |
| 2472 | * fib6_add_rt2node() has reject it). |
| 2473 | */ |
| 2474 | cfg->fc_nlinfo.nlh->nlmsg_flags &= ~NLM_F_EXCL; |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2475 | rtnh = rtnh_next(rtnh, &remaining); |
| 2476 | } |
| 2477 | |
| 2478 | return last_err; |
| 2479 | } |
| 2480 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 2481 | static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2483 | struct fib6_config cfg; |
| 2484 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2486 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2487 | if (err < 0) |
| 2488 | return err; |
| 2489 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2490 | if (cfg.fc_mp) |
| 2491 | return ip6_route_multipath(&cfg, 0); |
| 2492 | else |
| 2493 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | } |
| 2495 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 2496 | static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2498 | struct fib6_config cfg; |
| 2499 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2501 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2502 | if (err < 0) |
| 2503 | return err; |
| 2504 | |
Nicolas Dichtel | 51ebd31 | 2012-10-22 03:42:09 +0000 | [diff] [blame] | 2505 | if (cfg.fc_mp) |
| 2506 | return ip6_route_multipath(&cfg, 1); |
| 2507 | else |
| 2508 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | } |
| 2510 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2511 | static inline size_t rt6_nlmsg_size(void) |
| 2512 | { |
| 2513 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2514 | + nla_total_size(16) /* RTA_SRC */ |
| 2515 | + nla_total_size(16) /* RTA_DST */ |
| 2516 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 2517 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 2518 | + nla_total_size(4) /* RTA_TABLE */ |
| 2519 | + nla_total_size(4) /* RTA_IIF */ |
| 2520 | + nla_total_size(4) /* RTA_OIF */ |
| 2521 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 2522 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2523 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
| 2524 | } |
| 2525 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2526 | static int rt6_fill_node(struct net *net, |
| 2527 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 2528 | struct in6_addr *dst, struct in6_addr *src, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2529 | int iif, int type, u32 portid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2530 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | { |
| 2532 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2533 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2534 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2535 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | |
| 2537 | if (prefix) { /* user wants prefix routes only */ |
| 2538 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 2539 | /* success since this is not a prefix route */ |
| 2540 | return 1; |
| 2541 | } |
| 2542 | } |
| 2543 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2544 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*rtm), flags); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2545 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2546 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2547 | |
| 2548 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | rtm->rtm_family = AF_INET6; |
| 2550 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 2551 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 2552 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2553 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2554 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2555 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2556 | table = RT6_TABLE_UNSPEC; |
| 2557 | rtm->rtm_table = table; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2558 | if (nla_put_u32(skb, RTA_TABLE, table)) |
| 2559 | goto nla_put_failure; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2560 | if (rt->rt6i_flags & RTF_REJECT) { |
| 2561 | switch (rt->dst.error) { |
| 2562 | case -EINVAL: |
| 2563 | rtm->rtm_type = RTN_BLACKHOLE; |
| 2564 | break; |
| 2565 | case -EACCES: |
| 2566 | rtm->rtm_type = RTN_PROHIBIT; |
| 2567 | break; |
Nicolas Dichtel | b4949ab | 2012-09-06 05:53:35 +0000 | [diff] [blame] | 2568 | case -EAGAIN: |
| 2569 | rtm->rtm_type = RTN_THROW; |
| 2570 | break; |
Nicolas Dichtel | ef2c7d7 | 2012-09-05 02:12:42 +0000 | [diff] [blame] | 2571 | default: |
| 2572 | rtm->rtm_type = RTN_UNREACHABLE; |
| 2573 | break; |
| 2574 | } |
| 2575 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2576 | else if (rt->rt6i_flags & RTF_LOCAL) |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2577 | rtm->rtm_type = RTN_LOCAL; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2578 | else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | rtm->rtm_type = RTN_LOCAL; |
| 2580 | else |
| 2581 | rtm->rtm_type = RTN_UNICAST; |
| 2582 | rtm->rtm_flags = 0; |
| 2583 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 2584 | rtm->rtm_protocol = rt->rt6i_protocol; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2585 | if (rt->rt6i_flags & RTF_DYNAMIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | rtm->rtm_protocol = RTPROT_REDIRECT; |
Denis Ovsienko | f0396f60 | 2012-07-10 04:45:50 +0000 | [diff] [blame] | 2587 | else if (rt->rt6i_flags & RTF_ADDRCONF) { |
| 2588 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO)) |
| 2589 | rtm->rtm_protocol = RTPROT_RA; |
| 2590 | else |
| 2591 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 2592 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2594 | if (rt->rt6i_flags & RTF_CACHE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | rtm->rtm_flags |= RTM_F_CLONED; |
| 2596 | |
| 2597 | if (dst) { |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2598 | if (nla_put(skb, RTA_DST, 16, dst)) |
| 2599 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2600 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | } else if (rtm->rtm_dst_len) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2602 | if (nla_put(skb, RTA_DST, 16, &rt->rt6i_dst.addr)) |
| 2603 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | #ifdef CONFIG_IPV6_SUBTREES |
| 2605 | if (src) { |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2606 | if (nla_put(skb, RTA_SRC, 16, src)) |
| 2607 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2608 | rtm->rtm_src_len = 128; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2609 | } else if (rtm->rtm_src_len && |
| 2610 | nla_put(skb, RTA_SRC, 16, &rt->rt6i_src.addr)) |
| 2611 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2613 | if (iif) { |
| 2614 | #ifdef CONFIG_IPV6_MROUTE |
| 2615 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2616 | int err = ip6mr_get_route(net, skb, rtm, nowait); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2617 | if (err <= 0) { |
| 2618 | if (!nowait) { |
| 2619 | if (err == 0) |
| 2620 | return 0; |
| 2621 | goto nla_put_failure; |
| 2622 | } else { |
| 2623 | if (err == -EMSGSIZE) |
| 2624 | goto nla_put_failure; |
| 2625 | } |
| 2626 | } |
| 2627 | } else |
| 2628 | #endif |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2629 | if (nla_put_u32(skb, RTA_IIF, iif)) |
| 2630 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2631 | } else if (dst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | struct in6_addr saddr_buf; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2633 | if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0 && |
| 2634 | nla_put(skb, RTA_PREFSRC, 16, &saddr_buf)) |
| 2635 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2637 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2638 | if (rt->rt6i_prefsrc.plen) { |
| 2639 | struct in6_addr saddr_buf; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2640 | saddr_buf = rt->rt6i_prefsrc.addr; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2641 | if (nla_put(skb, RTA_PREFSRC, 16, &saddr_buf)) |
| 2642 | goto nla_put_failure; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2643 | } |
| 2644 | |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2645 | if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2646 | goto nla_put_failure; |
| 2647 | |
YOSHIFUJI Hideaki / 吉藤英明 | dd0cbf2 | 2013-01-17 12:53:15 +0000 | [diff] [blame] | 2648 | if (rt->rt6i_flags & RTF_GATEWAY) { |
| 2649 | if (nla_put(skb, RTA_GATEWAY, 16, &rt->rt6i_gateway) < 0) |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 2650 | goto nla_put_failure; |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 2651 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2652 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2653 | if (rt->dst.dev && |
| 2654 | nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) |
| 2655 | goto nla_put_failure; |
| 2656 | if (nla_put_u32(skb, RTA_PRIORITY, rt->rt6i_metric)) |
| 2657 | goto nla_put_failure; |
Li Wei | 8253947 | 2012-07-29 16:01:30 +0000 | [diff] [blame] | 2658 | |
| 2659 | expires = (rt->rt6i_flags & RTF_EXPIRES) ? rt->dst.expires - jiffies : 0; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 2660 | |
David S. Miller | 87a5069 | 2012-07-10 05:06:14 -0700 | [diff] [blame] | 2661 | 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] | 2662 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2664 | return nlmsg_end(skb, nlh); |
| 2665 | |
| 2666 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2667 | nlmsg_cancel(skb, nlh); |
| 2668 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | } |
| 2670 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 2671 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2672 | { |
| 2673 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 2674 | int prefix; |
| 2675 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2676 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 2677 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 2679 | } else |
| 2680 | prefix = 0; |
| 2681 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2682 | return rt6_fill_node(arg->net, |
| 2683 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2684 | NETLINK_CB(arg->cb->skb).portid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2685 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | } |
| 2687 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 2688 | 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] | 2689 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2690 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2691 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2693 | struct sk_buff *skb; |
| 2694 | struct rtmsg *rtm; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2695 | struct flowi6 fl6; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2696 | int err, iif = 0, oif = 0; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2697 | |
| 2698 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2699 | if (err < 0) |
| 2700 | goto errout; |
| 2701 | |
| 2702 | err = -EINVAL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2703 | memset(&fl6, 0, sizeof(fl6)); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2704 | |
| 2705 | if (tb[RTA_SRC]) { |
| 2706 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 2707 | goto errout; |
| 2708 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2709 | fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2710 | } |
| 2711 | |
| 2712 | if (tb[RTA_DST]) { |
| 2713 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 2714 | goto errout; |
| 2715 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2716 | fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2717 | } |
| 2718 | |
| 2719 | if (tb[RTA_IIF]) |
| 2720 | iif = nla_get_u32(tb[RTA_IIF]); |
| 2721 | |
| 2722 | if (tb[RTA_OIF]) |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2723 | oif = nla_get_u32(tb[RTA_OIF]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2724 | |
| 2725 | if (iif) { |
| 2726 | struct net_device *dev; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2727 | int flags = 0; |
| 2728 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2729 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2730 | if (!dev) { |
| 2731 | err = -ENODEV; |
| 2732 | goto errout; |
| 2733 | } |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2734 | |
| 2735 | fl6.flowi6_iif = iif; |
| 2736 | |
| 2737 | if (!ipv6_addr_any(&fl6.saddr)) |
| 2738 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 2739 | |
| 2740 | rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, |
| 2741 | flags); |
| 2742 | } else { |
| 2743 | fl6.flowi6_oif = oif; |
| 2744 | |
| 2745 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2746 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | |
| 2748 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2749 | if (!skb) { |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2750 | ip6_rt_put(rt); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2751 | err = -ENOBUFS; |
| 2752 | goto errout; |
| 2753 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | |
| 2755 | /* Reserve room for dummy headers, this skb can pass |
| 2756 | through good chunk of routing engine. |
| 2757 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 2758 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 2760 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2761 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2763 | 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] | 2764 | RTM_NEWROUTE, NETLINK_CB(in_skb).portid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2765 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2767 | kfree_skb(skb); |
| 2768 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | } |
| 2770 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2771 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2772 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | } |
| 2775 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2776 | void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | { |
| 2778 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2779 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2780 | u32 seq; |
| 2781 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2783 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2784 | seq = info->nlh ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2785 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2786 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2787 | if (!skb) |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2788 | goto errout; |
| 2789 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2790 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2791 | event, info->portid, seq, 0, 0, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2792 | if (err < 0) { |
| 2793 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 2794 | WARN_ON(err == -EMSGSIZE); |
| 2795 | kfree_skb(skb); |
| 2796 | goto errout; |
| 2797 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2798 | rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE, |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 2799 | info->nlh, gfp_any()); |
| 2800 | return; |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2801 | errout: |
| 2802 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2803 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2804 | } |
| 2805 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2806 | static int ip6_route_dev_notify(struct notifier_block *this, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2807 | unsigned long event, void *ptr) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2808 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2809 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2810 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2811 | |
| 2812 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2813 | net->ipv6.ip6_null_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2814 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 2815 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2816 | net->ipv6.ip6_prohibit_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2817 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2818 | net->ipv6.ip6_blk_hole_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2819 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 2820 | #endif |
| 2821 | } |
| 2822 | |
| 2823 | return NOTIFY_OK; |
| 2824 | } |
| 2825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | /* |
| 2827 | * /proc |
| 2828 | */ |
| 2829 | |
| 2830 | #ifdef CONFIG_PROC_FS |
| 2831 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2832 | static const struct file_operations ipv6_route_proc_fops = { |
| 2833 | .owner = THIS_MODULE, |
| 2834 | .open = ipv6_route_open, |
| 2835 | .read = seq_read, |
| 2836 | .llseek = seq_lseek, |
Hannes Frederic Sowa | 8d2ca1d | 2013-09-21 16:55:59 +0200 | [diff] [blame] | 2837 | .release = seq_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2838 | }; |
| 2839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2840 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 2841 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2842 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2844 | net->ipv6.rt6_stats->fib_nodes, |
| 2845 | net->ipv6.rt6_stats->fib_route_nodes, |
| 2846 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 2847 | net->ipv6.rt6_stats->fib_rt_entries, |
| 2848 | net->ipv6.rt6_stats->fib_rt_cache, |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2849 | dst_entries_get_slow(&net->ipv6.ip6_dst_ops), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2850 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2851 | |
| 2852 | return 0; |
| 2853 | } |
| 2854 | |
| 2855 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 2856 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2857 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2858 | } |
| 2859 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2860 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | .owner = THIS_MODULE, |
| 2862 | .open = rt6_stats_seq_open, |
| 2863 | .read = seq_read, |
| 2864 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2865 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | }; |
| 2867 | #endif /* CONFIG_PROC_FS */ |
| 2868 | |
| 2869 | #ifdef CONFIG_SYSCTL |
| 2870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 2872 | int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 2874 | { |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2875 | struct net *net; |
| 2876 | int delay; |
| 2877 | if (!write) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | return -EINVAL; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2879 | |
| 2880 | net = (struct net *)ctl->extra1; |
| 2881 | delay = net->ipv6.sysctl.flush_delay; |
| 2882 | proc_dointvec(ctl, write, buffer, lenp, ppos); |
Michal Kubeček | 2ac3ac8 | 2013-08-01 10:04:14 +0200 | [diff] [blame] | 2883 | 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] | 2884 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | } |
| 2886 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 2887 | struct ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2888 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2890 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 2892 | .mode = 0200, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2893 | .proc_handler = ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2894 | }, |
| 2895 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2896 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2897 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | .maxlen = sizeof(int), |
| 2899 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2900 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | }, |
| 2902 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2903 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2904 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | .maxlen = sizeof(int), |
| 2906 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2907 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | }, |
| 2909 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2911 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | .maxlen = sizeof(int), |
| 2913 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2914 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2915 | }, |
| 2916 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2918 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | .maxlen = sizeof(int), |
| 2920 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2921 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2922 | }, |
| 2923 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2924 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2925 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | .maxlen = sizeof(int), |
| 2927 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2928 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | }, |
| 2930 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2932 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | .maxlen = sizeof(int), |
| 2934 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 2935 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2936 | }, |
| 2937 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2939 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | .maxlen = sizeof(int), |
| 2941 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2942 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | }, |
| 2944 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2946 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2947 | .maxlen = sizeof(int), |
| 2948 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 2949 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2950 | }, |
| 2951 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2953 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | .maxlen = sizeof(int), |
| 2955 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2956 | .proc_handler = proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2957 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2958 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | }; |
| 2960 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2961 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2962 | { |
| 2963 | struct ctl_table *table; |
| 2964 | |
| 2965 | table = kmemdup(ipv6_route_table_template, |
| 2966 | sizeof(ipv6_route_table_template), |
| 2967 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2968 | |
| 2969 | if (table) { |
| 2970 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2971 | table[0].extra1 = net; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2972 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2973 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 2974 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 2975 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 2976 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 2977 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 2978 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 2979 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
Alexey Dobriyan | 9c69fab | 2009-12-18 20:11:03 -0800 | [diff] [blame] | 2980 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
Eric W. Biederman | 464dc80 | 2012-11-16 03:02:59 +0000 | [diff] [blame] | 2981 | |
| 2982 | /* Don't export sysctls to unprivileged users */ |
| 2983 | if (net->user_ns != &init_user_ns) |
| 2984 | table[0].procname = NULL; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2985 | } |
| 2986 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2987 | return table; |
| 2988 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2989 | #endif |
| 2990 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2991 | static int __net_init ip6_route_net_init(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2992 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 2993 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2994 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2995 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
| 2996 | sizeof(net->ipv6.ip6_dst_ops)); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2997 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2998 | if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0) |
| 2999 | goto out_ip6_dst_ops; |
| 3000 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3001 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 3002 | sizeof(*net->ipv6.ip6_null_entry), |
| 3003 | GFP_KERNEL); |
| 3004 | if (!net->ipv6.ip6_null_entry) |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3005 | goto out_ip6_dst_entries; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3006 | net->ipv6.ip6_null_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3007 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3008 | 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] | 3009 | dst_init_metrics(&net->ipv6.ip6_null_entry->dst, |
| 3010 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3011 | |
| 3012 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3013 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 3014 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 3015 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3016 | if (!net->ipv6.ip6_prohibit_entry) |
| 3017 | goto out_ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3018 | net->ipv6.ip6_prohibit_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3019 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3020 | 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] | 3021 | dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst, |
| 3022 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3023 | |
| 3024 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 3025 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 3026 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3027 | if (!net->ipv6.ip6_blk_hole_entry) |
| 3028 | goto out_ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3029 | net->ipv6.ip6_blk_hole_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3030 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3031 | 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] | 3032 | dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst, |
| 3033 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3034 | #endif |
| 3035 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 3036 | net->ipv6.sysctl.flush_delay = 0; |
| 3037 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 3038 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 3039 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 3040 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 3041 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 3042 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 3043 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 3044 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 3045 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 3046 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3047 | ret = 0; |
| 3048 | out: |
| 3049 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3050 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 3051 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3052 | out_ip6_prohibit_entry: |
| 3053 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3054 | out_ip6_null_entry: |
| 3055 | kfree(net->ipv6.ip6_null_entry); |
| 3056 | #endif |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3057 | out_ip6_dst_entries: |
| 3058 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3059 | out_ip6_dst_ops: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3060 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3061 | } |
| 3062 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3063 | static void __net_exit ip6_route_net_exit(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3064 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3065 | kfree(net->ipv6.ip6_null_entry); |
| 3066 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 3067 | kfree(net->ipv6.ip6_prohibit_entry); |
| 3068 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 3069 | #endif |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3070 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3071 | } |
| 3072 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3073 | static int __net_init ip6_route_net_init_late(struct net *net) |
| 3074 | { |
| 3075 | #ifdef CONFIG_PROC_FS |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 3076 | proc_create("ipv6_route", 0, net->proc_net, &ipv6_route_proc_fops); |
| 3077 | 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] | 3078 | #endif |
| 3079 | return 0; |
| 3080 | } |
| 3081 | |
| 3082 | static void __net_exit ip6_route_net_exit_late(struct net *net) |
| 3083 | { |
| 3084 | #ifdef CONFIG_PROC_FS |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 3085 | remove_proc_entry("ipv6_route", net->proc_net); |
| 3086 | remove_proc_entry("rt6_stats", net->proc_net); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3087 | #endif |
| 3088 | } |
| 3089 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3090 | static struct pernet_operations ip6_route_net_ops = { |
| 3091 | .init = ip6_route_net_init, |
| 3092 | .exit = ip6_route_net_exit, |
| 3093 | }; |
| 3094 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3095 | static int __net_init ipv6_inetpeer_init(struct net *net) |
| 3096 | { |
| 3097 | struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL); |
| 3098 | |
| 3099 | if (!bp) |
| 3100 | return -ENOMEM; |
| 3101 | inet_peer_base_init(bp); |
| 3102 | net->ipv6.peers = bp; |
| 3103 | return 0; |
| 3104 | } |
| 3105 | |
| 3106 | static void __net_exit ipv6_inetpeer_exit(struct net *net) |
| 3107 | { |
| 3108 | struct inet_peer_base *bp = net->ipv6.peers; |
| 3109 | |
| 3110 | net->ipv6.peers = NULL; |
David S. Miller | 56a6b24 | 2012-06-09 16:32:41 -0700 | [diff] [blame] | 3111 | inetpeer_invalidate_tree(bp); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3112 | kfree(bp); |
| 3113 | } |
| 3114 | |
David S. Miller | 2b823f7 | 2012-06-09 19:00:16 -0700 | [diff] [blame] | 3115 | static struct pernet_operations ipv6_inetpeer_ops = { |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3116 | .init = ipv6_inetpeer_init, |
| 3117 | .exit = ipv6_inetpeer_exit, |
| 3118 | }; |
| 3119 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3120 | static struct pernet_operations ip6_route_net_late_ops = { |
| 3121 | .init = ip6_route_net_init_late, |
| 3122 | .exit = ip6_route_net_exit_late, |
| 3123 | }; |
| 3124 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3125 | static struct notifier_block ip6_route_dev_notifier = { |
| 3126 | .notifier_call = ip6_route_dev_notify, |
| 3127 | .priority = 0, |
| 3128 | }; |
| 3129 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3130 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3132 | int ret; |
| 3133 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 3134 | ret = -ENOMEM; |
| 3135 | ip6_dst_ops_template.kmem_cachep = |
| 3136 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 3137 | SLAB_HWCACHE_ALIGN, NULL); |
| 3138 | if (!ip6_dst_ops_template.kmem_cachep) |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 3139 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 3140 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3141 | ret = dst_entries_init(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3142 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3143 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 3144 | |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3145 | ret = register_pernet_subsys(&ipv6_inetpeer_ops); |
| 3146 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3147 | goto out_dst_entries; |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3148 | |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3149 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 3150 | if (ret) |
| 3151 | goto out_register_inetpeer; |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3152 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 3153 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 3154 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3155 | /* Registering of the loopback is done before this portion of code, |
| 3156 | * the loopback reference in rt6_info will not be taken, do it |
| 3157 | * manually for init_net */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3158 | init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3159 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3160 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3161 | init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3162 | 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] | 3163 | 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] | 3164 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3165 | #endif |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3166 | ret = fib6_init(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3167 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3168 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3169 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3170 | ret = xfrm6_init(); |
| 3171 | if (ret) |
David S. Miller | e8803b6 | 2012-06-16 01:12:19 -0700 | [diff] [blame] | 3172 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 3173 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3174 | ret = fib6_rules_init(); |
| 3175 | if (ret) |
| 3176 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 3177 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3178 | ret = register_pernet_subsys(&ip6_route_net_late_ops); |
| 3179 | if (ret) |
| 3180 | goto fib6_rules_init; |
| 3181 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3182 | ret = -ENOBUFS; |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 3183 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) || |
| 3184 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) || |
| 3185 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL)) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3186 | goto out_register_late_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3187 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3188 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3189 | if (ret) |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3190 | goto out_register_late_subsys; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3191 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3192 | out: |
| 3193 | return ret; |
| 3194 | |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3195 | out_register_late_subsys: |
| 3196 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3197 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3198 | fib6_rules_cleanup(); |
| 3199 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3200 | xfrm6_fini(); |
Thomas Graf | 2a0c451 | 2012-06-14 23:00:17 +0000 | [diff] [blame] | 3201 | out_fib6_init: |
| 3202 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3203 | out_register_subsys: |
| 3204 | unregister_pernet_subsys(&ip6_route_net_ops); |
David S. Miller | 7e52b33 | 2012-06-15 15:51:55 -0700 | [diff] [blame] | 3205 | out_register_inetpeer: |
| 3206 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3207 | out_dst_entries: |
| 3208 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3209 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3210 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3211 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | } |
| 3213 | |
| 3214 | void ip6_route_cleanup(void) |
| 3215 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3216 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | d189634 | 2012-06-18 12:08:33 +0000 | [diff] [blame] | 3217 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 3218 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3220 | fib6_gc_cleanup(); |
David S. Miller | c3426b4 | 2012-06-09 16:27:05 -0700 | [diff] [blame] | 3221 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3222 | unregister_pernet_subsys(&ip6_route_net_ops); |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3223 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3224 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | } |