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 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 27 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/errno.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 29 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/types.h> |
| 31 | #include <linux/times.h> |
| 32 | #include <linux/socket.h> |
| 33 | #include <linux/sockios.h> |
| 34 | #include <linux/net.h> |
| 35 | #include <linux/route.h> |
| 36 | #include <linux/netdevice.h> |
| 37 | #include <linux/in6.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 38 | #include <linux/mroute6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/if_arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/proc_fs.h> |
| 42 | #include <linux/seq_file.h> |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 43 | #include <linux/nsproxy.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 44 | #include <linux/slab.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 45 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <net/snmp.h> |
| 47 | #include <net/ipv6.h> |
| 48 | #include <net/ip6_fib.h> |
| 49 | #include <net/ip6_route.h> |
| 50 | #include <net/ndisc.h> |
| 51 | #include <net/addrconf.h> |
| 52 | #include <net/tcp.h> |
| 53 | #include <linux/rtnetlink.h> |
| 54 | #include <net/dst.h> |
| 55 | #include <net/xfrm.h> |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 56 | #include <net/netevent.h> |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 57 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | #include <asm/uaccess.h> |
| 60 | |
| 61 | #ifdef CONFIG_SYSCTL |
| 62 | #include <linux/sysctl.h> |
| 63 | #endif |
| 64 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 65 | static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort, |
| 66 | const struct in6_addr *dest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | 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] | 68 | static unsigned int ip6_default_advmss(const struct dst_entry *dst); |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 69 | static unsigned int ip6_mtu(const struct dst_entry *dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
| 71 | static void ip6_dst_destroy(struct dst_entry *); |
| 72 | static void ip6_dst_ifdown(struct dst_entry *, |
| 73 | struct net_device *dev, int how); |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 74 | static int ip6_dst_gc(struct dst_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | static int ip6_pkt_discard(struct sk_buff *skb); |
| 77 | static int ip6_pkt_discard_out(struct sk_buff *skb); |
| 78 | static void ip6_link_failure(struct sk_buff *skb); |
| 79 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu); |
| 80 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 81 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 82 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 83 | const struct in6_addr *prefix, int prefixlen, |
| 84 | const struct in6_addr *gwaddr, int ifindex, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 85 | unsigned pref); |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 86 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 87 | const struct in6_addr *prefix, int prefixlen, |
| 88 | const struct in6_addr *gwaddr, int ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 89 | #endif |
| 90 | |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 91 | static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) |
| 92 | { |
| 93 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 94 | struct inet_peer *peer; |
| 95 | u32 *p = NULL; |
| 96 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 97 | if (!(rt->dst.flags & DST_HOST)) |
| 98 | return NULL; |
| 99 | |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 100 | if (!rt->rt6i_peer) |
| 101 | rt6_bind_peer(rt, 1); |
| 102 | |
| 103 | peer = rt->rt6i_peer; |
| 104 | if (peer) { |
| 105 | u32 *old_p = __DST_METRICS_PTR(old); |
| 106 | unsigned long prev, new; |
| 107 | |
| 108 | p = peer->metrics; |
| 109 | if (inet_metrics_new(peer)) |
| 110 | memcpy(p, old_p, sizeof(u32) * RTAX_MAX); |
| 111 | |
| 112 | new = (unsigned long) p; |
| 113 | prev = cmpxchg(&dst->_metrics, old, new); |
| 114 | |
| 115 | if (prev != old) { |
| 116 | p = __DST_METRICS_PTR(prev); |
| 117 | if (prev & DST_METRICS_READ_ONLY) |
| 118 | p = NULL; |
| 119 | } |
| 120 | } |
| 121 | return p; |
| 122 | } |
| 123 | |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 124 | static inline const void *choose_neigh_daddr(struct rt6_info *rt, const void *daddr) |
| 125 | { |
| 126 | struct in6_addr *p = &rt->rt6i_gateway; |
| 127 | |
David S. Miller | a7563f3 | 2012-01-26 16:29:16 -0500 | [diff] [blame] | 128 | if (!ipv6_addr_any(p)) |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 129 | return (const void *) p; |
| 130 | return daddr; |
| 131 | } |
| 132 | |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 133 | static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, const void *daddr) |
| 134 | { |
David S. Miller | 3923297 | 2012-01-26 15:22:32 -0500 | [diff] [blame] | 135 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 136 | struct neighbour *n; |
| 137 | |
| 138 | daddr = choose_neigh_daddr(rt, daddr); |
| 139 | n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 140 | if (n) |
| 141 | return n; |
| 142 | return neigh_create(&nd_tbl, daddr, dst->dev); |
| 143 | } |
| 144 | |
David S. Miller | 8ade06c | 2011-12-29 18:51:57 -0500 | [diff] [blame] | 145 | static int rt6_bind_neighbour(struct rt6_info *rt, struct net_device *dev) |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 146 | { |
David S. Miller | 8ade06c | 2011-12-29 18:51:57 -0500 | [diff] [blame] | 147 | struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dev, &rt->rt6i_gateway); |
| 148 | if (!n) { |
| 149 | n = neigh_create(&nd_tbl, &rt->rt6i_gateway, dev); |
| 150 | if (IS_ERR(n)) |
| 151 | return PTR_ERR(n); |
| 152 | } |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 153 | dst_set_neighbour(&rt->dst, n); |
| 154 | |
| 155 | return 0; |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 158 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 160 | .protocol = cpu_to_be16(ETH_P_IPV6), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | .gc = ip6_dst_gc, |
| 162 | .gc_thresh = 1024, |
| 163 | .check = ip6_dst_check, |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 164 | .default_advmss = ip6_default_advmss, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 165 | .mtu = ip6_mtu, |
David S. Miller | 0658254 | 2011-01-27 14:58:42 -0800 | [diff] [blame] | 166 | .cow_metrics = ipv6_cow_metrics, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | .destroy = ip6_dst_destroy, |
| 168 | .ifdown = ip6_dst_ifdown, |
| 169 | .negative_advice = ip6_negative_advice, |
| 170 | .link_failure = ip6_link_failure, |
| 171 | .update_pmtu = ip6_rt_update_pmtu, |
Herbert Xu | 1ac06e0 | 2008-05-20 14:32:14 -0700 | [diff] [blame] | 172 | .local_out = __ip6_local_out, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 173 | .neigh_lookup = ip6_neigh_lookup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | }; |
| 175 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 176 | static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst) |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 177 | { |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 178 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 179 | |
| 180 | return mtu ? : dst->dev->mtu; |
Roland Dreier | ec831ea | 2011-01-31 13:16:00 -0800 | [diff] [blame] | 181 | } |
| 182 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 183 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 184 | { |
| 185 | } |
| 186 | |
Held Bernhard | 0972ddb | 2011-04-24 22:07:32 +0000 | [diff] [blame] | 187 | static u32 *ip6_rt_blackhole_cow_metrics(struct dst_entry *dst, |
| 188 | unsigned long old) |
| 189 | { |
| 190 | return NULL; |
| 191 | } |
| 192 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 193 | static struct dst_ops ip6_dst_blackhole_ops = { |
| 194 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 195 | .protocol = cpu_to_be16(ETH_P_IPV6), |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 196 | .destroy = ip6_dst_destroy, |
| 197 | .check = ip6_dst_check, |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 198 | .mtu = ip6_blackhole_mtu, |
Eric Dumazet | 214f45c | 2011-02-18 11:39:01 -0800 | [diff] [blame] | 199 | .default_advmss = ip6_default_advmss, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 200 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
Held Bernhard | 0972ddb | 2011-04-24 22:07:32 +0000 | [diff] [blame] | 201 | .cow_metrics = ip6_rt_blackhole_cow_metrics, |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 202 | .neigh_lookup = ip6_neigh_lookup, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 203 | }; |
| 204 | |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 205 | static const u32 ip6_template_metrics[RTAX_MAX] = { |
| 206 | [RTAX_HOPLIMIT - 1] = 255, |
| 207 | }; |
| 208 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 209 | static struct rt6_info ip6_null_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 210 | .dst = { |
| 211 | .__refcnt = ATOMIC_INIT(1), |
| 212 | .__use = 1, |
| 213 | .obsolete = -1, |
| 214 | .error = -ENETUNREACH, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 215 | .input = ip6_pkt_discard, |
| 216 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | }, |
| 218 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 219 | .rt6i_protocol = RTPROT_KERNEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | .rt6i_metric = ~(u32) 0, |
| 221 | .rt6i_ref = ATOMIC_INIT(1), |
| 222 | }; |
| 223 | |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 224 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 225 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 226 | static int ip6_pkt_prohibit(struct sk_buff *skb); |
| 227 | static int ip6_pkt_prohibit_out(struct sk_buff *skb); |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 228 | |
Adrian Bunk | 280a34c | 2008-04-21 02:29:32 -0700 | [diff] [blame] | 229 | static struct rt6_info ip6_prohibit_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 230 | .dst = { |
| 231 | .__refcnt = ATOMIC_INIT(1), |
| 232 | .__use = 1, |
| 233 | .obsolete = -1, |
| 234 | .error = -EACCES, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 235 | .input = ip6_pkt_prohibit, |
| 236 | .output = ip6_pkt_prohibit_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 237 | }, |
| 238 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 239 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 240 | .rt6i_metric = ~(u32) 0, |
| 241 | .rt6i_ref = ATOMIC_INIT(1), |
| 242 | }; |
| 243 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 244 | static struct rt6_info ip6_blk_hole_entry_template = { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 245 | .dst = { |
| 246 | .__refcnt = ATOMIC_INIT(1), |
| 247 | .__use = 1, |
| 248 | .obsolete = -1, |
| 249 | .error = -EINVAL, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 250 | .input = dst_discard, |
| 251 | .output = dst_discard, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 252 | }, |
| 253 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 254 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 255 | .rt6i_metric = ~(u32) 0, |
| 256 | .rt6i_ref = ATOMIC_INIT(1), |
| 257 | }; |
| 258 | |
| 259 | #endif |
| 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | /* allocate dst with ip6_dst_ops */ |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 262 | static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops, |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 263 | struct net_device *dev, |
| 264 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | { |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 266 | struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, flags); |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 267 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 268 | if (rt) |
Madalin Bucur | fbe5818 | 2011-09-26 07:04:56 +0000 | [diff] [blame] | 269 | memset(&rt->rt6i_table, 0, |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 270 | sizeof(*rt) - sizeof(struct dst_entry)); |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 271 | |
| 272 | return rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static void ip6_dst_destroy(struct dst_entry *dst) |
| 276 | { |
| 277 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 278 | struct inet6_dev *idev = rt->rt6i_idev; |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 279 | struct inet_peer *peer = rt->rt6i_peer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 281 | if (!(rt->dst.flags & DST_HOST)) |
| 282 | dst_destroy_metrics_generic(dst); |
| 283 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 284 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | rt->rt6i_idev = NULL; |
| 286 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 287 | } |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 288 | if (peer) { |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 289 | rt->rt6i_peer = NULL; |
| 290 | inet_putpeer(peer); |
| 291 | } |
| 292 | } |
| 293 | |
David S. Miller | 6431cbc | 2011-02-07 20:38:06 -0800 | [diff] [blame] | 294 | static atomic_t __rt6_peer_genid = ATOMIC_INIT(0); |
| 295 | |
| 296 | static u32 rt6_peer_genid(void) |
| 297 | { |
| 298 | return atomic_read(&__rt6_peer_genid); |
| 299 | } |
| 300 | |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 301 | void rt6_bind_peer(struct rt6_info *rt, int create) |
| 302 | { |
| 303 | struct inet_peer *peer; |
| 304 | |
David S. Miller | b341936 | 2010-11-30 12:27:11 -0800 | [diff] [blame] | 305 | peer = inet_getpeer_v6(&rt->rt6i_dst.addr, create); |
| 306 | if (peer && cmpxchg(&rt->rt6i_peer, NULL, peer) != NULL) |
| 307 | inet_putpeer(peer); |
David S. Miller | 6431cbc | 2011-02-07 20:38:06 -0800 | [diff] [blame] | 308 | else |
| 309 | rt->rt6i_peer_genid = rt6_peer_genid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 313 | int how) |
| 314 | { |
| 315 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 316 | struct inet6_dev *idev = rt->rt6i_idev; |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 317 | struct net_device *loopback_dev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 318 | dev_net(dev)->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 320 | if (dev != loopback_dev && idev && idev->dev == dev) { |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 321 | struct inet6_dev *loopback_idev = |
| 322 | in6_dev_get(loopback_dev); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 323 | if (loopback_idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | rt->rt6i_idev = loopback_idev; |
| 325 | in6_dev_put(idev); |
| 326 | } |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | static __inline__ int rt6_check_expired(const struct rt6_info *rt) |
| 331 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 332 | return (rt->rt6i_flags & RTF_EXPIRES) && |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 333 | time_after(jiffies, rt->dst.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | } |
| 335 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 336 | static inline int rt6_need_strict(const struct in6_addr *daddr) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 337 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 338 | return ipv6_addr_type(daddr) & |
| 339 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 340 | } |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 343 | * Route lookup. Any table->tb6_lock is implied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | */ |
| 345 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 346 | static inline struct rt6_info *rt6_device_match(struct net *net, |
| 347 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 348 | const struct in6_addr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 350 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
| 352 | struct rt6_info *local = NULL; |
| 353 | struct rt6_info *sprt; |
| 354 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 355 | if (!oif && ipv6_addr_any(saddr)) |
| 356 | goto out; |
| 357 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 358 | for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 359 | struct net_device *dev = sprt->dst.dev; |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 360 | |
| 361 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | if (dev->ifindex == oif) |
| 363 | return sprt; |
| 364 | if (dev->flags & IFF_LOOPBACK) { |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 365 | if (!sprt->rt6i_idev || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | sprt->rt6i_idev->dev->ifindex != oif) { |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 367 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | continue; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 369 | if (local && (!oif || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | local->rt6i_idev->dev->ifindex == oif)) |
| 371 | continue; |
| 372 | } |
| 373 | local = sprt; |
| 374 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 375 | } else { |
| 376 | if (ipv6_chk_addr(net, saddr, dev, |
| 377 | flags & RT6_LOOKUP_F_IFACE)) |
| 378 | return sprt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 382 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | if (local) |
| 384 | return local; |
| 385 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 386 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 387 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 389 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return rt; |
| 391 | } |
| 392 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 393 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 394 | static void rt6_probe(struct rt6_info *rt) |
| 395 | { |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 396 | struct neighbour *neigh; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 397 | /* |
| 398 | * Okay, this does not seem to be appropriate |
| 399 | * for now, however, we need to check if it |
| 400 | * is really so; aka Router Reachability Probing. |
| 401 | * |
| 402 | * Router Reachability Probe MUST be rate-limited |
| 403 | * to no more than one per minute. |
| 404 | */ |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 405 | rcu_read_lock(); |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 406 | neigh = rt ? dst_get_neighbour_noref(&rt->dst) : NULL; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 407 | if (!neigh || (neigh->nud_state & NUD_VALID)) |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 408 | goto out; |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 409 | read_lock_bh(&neigh->lock); |
| 410 | if (!(neigh->nud_state & NUD_VALID) && |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 411 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 412 | struct in6_addr mcaddr; |
| 413 | struct in6_addr *target; |
| 414 | |
| 415 | neigh->updated = jiffies; |
| 416 | read_unlock_bh(&neigh->lock); |
| 417 | |
| 418 | target = (struct in6_addr *)&neigh->primary_key; |
| 419 | addrconf_addr_solict_mult(target, &mcaddr); |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 420 | ndisc_send_ns(rt->dst.dev, NULL, target, &mcaddr, NULL); |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 421 | } else { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 422 | read_unlock_bh(&neigh->lock); |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 423 | } |
| 424 | out: |
| 425 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 426 | } |
| 427 | #else |
| 428 | static inline void rt6_probe(struct rt6_info *rt) |
| 429 | { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 430 | } |
| 431 | #endif |
| 432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 434 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 436 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 438 | struct net_device *dev = rt->dst.dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 439 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 440 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 441 | if ((dev->flags & IFF_LOOPBACK) && |
| 442 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 443 | return 1; |
| 444 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 447 | static inline int rt6_check_neigh(struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 449 | struct neighbour *neigh; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 450 | int m; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 451 | |
| 452 | rcu_read_lock(); |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 453 | neigh = dst_get_neighbour_noref(&rt->dst); |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 454 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 455 | !(rt->rt6i_flags & RTF_GATEWAY)) |
| 456 | m = 1; |
| 457 | else if (neigh) { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 458 | read_lock_bh(&neigh->lock); |
| 459 | if (neigh->nud_state & NUD_VALID) |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 460 | m = 2; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 461 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 462 | else if (neigh->nud_state & NUD_FAILED) |
| 463 | m = 0; |
| 464 | #endif |
| 465 | else |
YOSHIFUJI Hideaki | ea73ee2 | 2006-11-06 09:45:44 -0800 | [diff] [blame] | 466 | m = 1; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 467 | read_unlock_bh(&neigh->lock); |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 468 | } else |
| 469 | m = 0; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 470 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 471 | return m; |
| 472 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 474 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 475 | int strict) |
| 476 | { |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 477 | int m, n; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 478 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 479 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 480 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 481 | return -1; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 482 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 483 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 484 | #endif |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 485 | n = rt6_check_neigh(rt); |
YOSHIFUJI Hideaki | 557e92e | 2006-11-06 09:45:45 -0800 | [diff] [blame] | 486 | if (!n && (strict & RT6_LOOKUP_F_REACHABLE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 487 | return -1; |
| 488 | return m; |
| 489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 491 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
| 492 | int *mpri, struct rt6_info *match) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 493 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 494 | int m; |
| 495 | |
| 496 | if (rt6_check_expired(rt)) |
| 497 | goto out; |
| 498 | |
| 499 | m = rt6_score_route(rt, oif, strict); |
| 500 | if (m < 0) |
| 501 | goto out; |
| 502 | |
| 503 | if (m > *mpri) { |
| 504 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 505 | rt6_probe(match); |
| 506 | *mpri = m; |
| 507 | match = rt; |
| 508 | } else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 509 | rt6_probe(rt); |
| 510 | } |
| 511 | |
| 512 | out: |
| 513 | return match; |
| 514 | } |
| 515 | |
| 516 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 517 | struct rt6_info *rr_head, |
| 518 | u32 metric, int oif, int strict) |
| 519 | { |
| 520 | struct rt6_info *rt, *match; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 521 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 523 | match = NULL; |
| 524 | for (rt = rr_head; rt && rt->rt6i_metric == metric; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 525 | rt = rt->dst.rt6_next) |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 526 | match = find_match(rt, oif, strict, &mpri, match); |
| 527 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 528 | rt = rt->dst.rt6_next) |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 529 | match = find_match(rt, oif, strict, &mpri, match); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 530 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 531 | return match; |
| 532 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 533 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 534 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 535 | { |
| 536 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 537 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 539 | rt0 = fn->rr_ptr; |
| 540 | if (!rt0) |
| 541 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 543 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 545 | if (!match && |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 546 | (strict & RT6_LOOKUP_F_REACHABLE)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 547 | struct rt6_info *next = rt0->dst.rt6_next; |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 548 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 549 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 550 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 551 | next = fn->leaf; |
| 552 | |
| 553 | if (next != rt0) |
| 554 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 557 | net = dev_net(rt0->dst.dev); |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 558 | return match ? match : net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
| 560 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 561 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 562 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 563 | const struct in6_addr *gwaddr) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 564 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 565 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 566 | struct route_info *rinfo = (struct route_info *) opt; |
| 567 | struct in6_addr prefix_buf, *prefix; |
| 568 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 569 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 570 | struct rt6_info *rt; |
| 571 | |
| 572 | if (len < sizeof(struct route_info)) { |
| 573 | return -EINVAL; |
| 574 | } |
| 575 | |
| 576 | /* Sanity check for prefix_len and length */ |
| 577 | if (rinfo->length > 3) { |
| 578 | return -EINVAL; |
| 579 | } else if (rinfo->prefix_len > 128) { |
| 580 | return -EINVAL; |
| 581 | } else if (rinfo->prefix_len > 64) { |
| 582 | if (rinfo->length < 2) { |
| 583 | return -EINVAL; |
| 584 | } |
| 585 | } else if (rinfo->prefix_len > 0) { |
| 586 | if (rinfo->length < 1) { |
| 587 | return -EINVAL; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | pref = rinfo->route_pref; |
| 592 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
Jens Rosenboom | 3933fc9 | 2009-09-10 06:25:11 +0000 | [diff] [blame] | 593 | return -EINVAL; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 594 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 595 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 596 | |
| 597 | if (rinfo->length == 3) |
| 598 | prefix = (struct in6_addr *)rinfo->prefix; |
| 599 | else { |
| 600 | /* this function is safe */ |
| 601 | ipv6_addr_prefix(&prefix_buf, |
| 602 | (struct in6_addr *)rinfo->prefix, |
| 603 | rinfo->prefix_len); |
| 604 | prefix = &prefix_buf; |
| 605 | } |
| 606 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 607 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr, |
| 608 | dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 609 | |
| 610 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 611 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 612 | rt = NULL; |
| 613 | } |
| 614 | |
| 615 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 616 | 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] | 617 | pref); |
| 618 | else if (rt) |
| 619 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 620 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 621 | |
| 622 | if (rt) { |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 623 | if (!addrconf_finite_timeout(lifetime)) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 624 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 625 | } else { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 626 | rt->dst.expires = jiffies + HZ * lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 627 | rt->rt6i_flags |= RTF_EXPIRES; |
| 628 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 629 | dst_release(&rt->dst); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 630 | } |
| 631 | return 0; |
| 632 | } |
| 633 | #endif |
| 634 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 635 | #define BACKTRACK(__net, saddr) \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 636 | do { \ |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 637 | if (rt == __net->ipv6.ip6_null_entry) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 638 | struct fib6_node *pn; \ |
Ville Nuorvala | e0eda7b | 2006-10-16 22:11:11 -0700 | [diff] [blame] | 639 | while (1) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 640 | if (fn->fn_flags & RTN_TL_ROOT) \ |
| 641 | goto out; \ |
| 642 | pn = fn->parent; \ |
| 643 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ |
Kim Nordlund | 8bce65b | 2006-12-13 16:38:29 -0800 | [diff] [blame] | 644 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 645 | else \ |
| 646 | fn = pn; \ |
| 647 | if (fn->fn_flags & RTN_RTINFO) \ |
| 648 | goto restart; \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 649 | } \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 650 | } \ |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 651 | } while (0) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 652 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 653 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 654 | struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 655 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | { |
| 657 | struct fib6_node *fn; |
| 658 | struct rt6_info *rt; |
| 659 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 660 | read_lock_bh(&table->tb6_lock); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 661 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 662 | restart: |
| 663 | rt = fn->leaf; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 664 | rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags); |
| 665 | BACKTRACK(net, &fl6->saddr); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 666 | out: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 667 | dst_use(&rt->dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 668 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 669 | return rt; |
| 670 | |
| 671 | } |
| 672 | |
Florian Westphal | ea6e574 | 2011-09-05 16:05:44 +0200 | [diff] [blame] | 673 | struct dst_entry * ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
| 674 | int flags) |
| 675 | { |
| 676 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup); |
| 677 | } |
| 678 | EXPORT_SYMBOL_GPL(ip6_route_lookup); |
| 679 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 680 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 681 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 682 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 683 | struct flowi6 fl6 = { |
| 684 | .flowi6_oif = oif, |
| 685 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 686 | }; |
| 687 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 688 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 689 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 690 | if (saddr) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 691 | memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 692 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 693 | } |
| 694 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 695 | dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 696 | if (dst->error == 0) |
| 697 | return (struct rt6_info *) dst; |
| 698 | |
| 699 | dst_release(dst); |
| 700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | return NULL; |
| 702 | } |
| 703 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 704 | EXPORT_SYMBOL(rt6_lookup); |
| 705 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 706 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | It takes new route entry, the addition fails by any reason the |
| 708 | route is freed. In any case, if caller does not hold it, it may |
| 709 | be destroyed. |
| 710 | */ |
| 711 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 712 | 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] | 713 | { |
| 714 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 715 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 717 | table = rt->rt6i_table; |
| 718 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 719 | err = fib6_add(&table->tb6_root, rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 720 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
| 722 | return err; |
| 723 | } |
| 724 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 725 | int ip6_ins_rt(struct rt6_info *rt) |
| 726 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 727 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 728 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 729 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 730 | return __ip6_ins_rt(rt, &info); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 731 | } |
| 732 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 733 | static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort, |
| 734 | const struct in6_addr *daddr, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 735 | const struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | struct rt6_info *rt; |
| 738 | |
| 739 | /* |
| 740 | * Clone the route. |
| 741 | */ |
| 742 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 743 | rt = ip6_rt_copy(ort, daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | if (rt) { |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 746 | int attempts = !in_softirq(); |
| 747 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 748 | if (!(rt->rt6i_flags & RTF_GATEWAY)) { |
David S. Miller | bb3c368 | 2011-12-13 17:35:06 -0500 | [diff] [blame] | 749 | if (ort->rt6i_dst.plen != 128 && |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 750 | ipv6_addr_equal(&ort->rt6i_dst.addr, daddr)) |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 751 | rt->rt6i_flags |= RTF_ANYCAST; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 752 | rt->rt6i_gateway = *daddr; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 753 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | rt->rt6i_flags |= RTF_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | #ifdef CONFIG_IPV6_SUBTREES |
| 758 | if (rt->rt6i_src.plen && saddr) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 759 | rt->rt6i_src.addr = *saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | rt->rt6i_src.plen = 128; |
| 761 | } |
| 762 | #endif |
| 763 | |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 764 | retry: |
David S. Miller | 8ade06c | 2011-12-29 18:51:57 -0500 | [diff] [blame] | 765 | if (rt6_bind_neighbour(rt, rt->dst.dev)) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 766 | struct net *net = dev_net(rt->dst.dev); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 767 | int saved_rt_min_interval = |
| 768 | net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 769 | int saved_rt_elasticity = |
| 770 | net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 771 | |
| 772 | if (attempts-- > 0) { |
| 773 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 1; |
| 774 | net->ipv6.sysctl.ip6_rt_gc_min_interval = 0; |
| 775 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 776 | ip6_dst_gc(&net->ipv6.ip6_dst_ops); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 777 | |
| 778 | net->ipv6.sysctl.ip6_rt_gc_elasticity = |
| 779 | saved_rt_elasticity; |
| 780 | net->ipv6.sysctl.ip6_rt_gc_min_interval = |
| 781 | saved_rt_min_interval; |
| 782 | goto retry; |
| 783 | } |
| 784 | |
| 785 | if (net_ratelimit()) |
| 786 | printk(KERN_WARNING |
Ulrich Weber | 7e1b33e | 2010-09-27 15:02:18 -0700 | [diff] [blame] | 787 | "ipv6: Neighbour table overflow.\n"); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 788 | dst_free(&rt->dst); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 789 | return NULL; |
| 790 | } |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 791 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 793 | return rt; |
| 794 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 796 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, |
| 797 | const struct in6_addr *daddr) |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 798 | { |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 799 | struct rt6_info *rt = ip6_rt_copy(ort, daddr); |
| 800 | |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 801 | if (rt) { |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 802 | rt->rt6i_flags |= RTF_CACHE; |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 803 | dst_set_neighbour(&rt->dst, neigh_clone(dst_get_neighbour_noref_raw(&ort->dst))); |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 804 | } |
| 805 | return rt; |
| 806 | } |
| 807 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 808 | 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] | 809 | struct flowi6 *fl6, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
| 811 | struct fib6_node *fn; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 812 | struct rt6_info *rt, *nrt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 813 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | int attempts = 3; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 815 | int err; |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 816 | int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 818 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | relookup: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 821 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 823 | restart_2: |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 824 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | restart: |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 827 | rt = rt6_select(fn, oif, strict | reachable); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 828 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 829 | BACKTRACK(net, &fl6->saddr); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 830 | if (rt == net->ipv6.ip6_null_entry || |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 831 | rt->rt6i_flags & RTF_CACHE) |
YOSHIFUJI Hideaki | 1ddef044 | 2006-03-20 17:01:24 -0800 | [diff] [blame] | 832 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 834 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 835 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 836 | |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 837 | if (!dst_get_neighbour_noref_raw(&rt->dst) && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 838 | nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr); |
David S. Miller | 7343ff3 | 2011-03-09 19:55:25 -0800 | [diff] [blame] | 839 | else if (!(rt->dst.flags & DST_HOST)) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 840 | nrt = rt6_alloc_clone(rt, &fl6->daddr); |
David S. Miller | 7343ff3 | 2011-03-09 19:55:25 -0800 | [diff] [blame] | 841 | else |
| 842 | goto out2; |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 843 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 844 | dst_release(&rt->dst); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 845 | rt = nrt ? : net->ipv6.ip6_null_entry; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 846 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 847 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 848 | if (nrt) { |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 849 | err = ip6_ins_rt(nrt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 850 | if (!err) |
| 851 | goto out2; |
| 852 | } |
| 853 | |
| 854 | if (--attempts <= 0) |
| 855 | goto out2; |
| 856 | |
| 857 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 858 | * Race condition! In the gap, when table->tb6_lock was |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 859 | * released someone could insert this route. Relookup. |
| 860 | */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 861 | dst_release(&rt->dst); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 862 | goto relookup; |
| 863 | |
| 864 | out: |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 865 | if (reachable) { |
| 866 | reachable = 0; |
| 867 | goto restart_2; |
| 868 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 869 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 870 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | out2: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 872 | rt->dst.lastuse = jiffies; |
| 873 | rt->dst.__use++; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 874 | |
| 875 | return rt; |
| 876 | } |
| 877 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 878 | 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] | 879 | struct flowi6 *fl6, int flags) |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 880 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 881 | return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 882 | } |
| 883 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 884 | static struct dst_entry *ip6_route_input_lookup(struct net *net, |
| 885 | struct net_device *dev, |
| 886 | struct flowi6 *fl6, int flags) |
| 887 | { |
| 888 | if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) |
| 889 | flags |= RT6_LOOKUP_F_IFACE; |
| 890 | |
| 891 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); |
| 892 | } |
| 893 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 894 | void ip6_route_input(struct sk_buff *skb) |
| 895 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 896 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 897 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 898 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 899 | struct flowi6 fl6 = { |
| 900 | .flowi6_iif = skb->dev->ifindex, |
| 901 | .daddr = iph->daddr, |
| 902 | .saddr = iph->saddr, |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 903 | .flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 904 | .flowi6_mark = skb->mark, |
| 905 | .flowi6_proto = iph->nexthdr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 906 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 907 | |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 908 | 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] | 909 | } |
| 910 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 911 | 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] | 912 | struct flowi6 *fl6, int flags) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 913 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 914 | return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 915 | } |
| 916 | |
Florian Westphal | 9c7a4f9 | 2011-03-22 19:17:36 -0700 | [diff] [blame] | 917 | 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] | 918 | struct flowi6 *fl6) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 919 | { |
| 920 | int flags = 0; |
| 921 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 922 | if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 923 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 924 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 925 | if (!ipv6_addr_any(&fl6->saddr)) |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 926 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki / 吉藤英明 | 0c9a2ac | 2010-03-07 00:14:44 +0000 | [diff] [blame] | 927 | else if (sk) |
| 928 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 929 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 930 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } |
| 932 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 933 | EXPORT_SYMBOL(ip6_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 935 | 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] | 936 | { |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 937 | struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 938 | struct dst_entry *new = NULL; |
| 939 | |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 940 | rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, 0, 0); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 941 | if (rt) { |
David S. Miller | cf91166 | 2011-04-28 14:31:47 -0700 | [diff] [blame] | 942 | memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry)); |
| 943 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 944 | new = &rt->dst; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 945 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 946 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 947 | new->input = dst_discard; |
| 948 | new->output = dst_discard; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 949 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 950 | if (dst_metrics_read_only(&ort->dst)) |
| 951 | new->_metrics = ort->dst._metrics; |
| 952 | else |
| 953 | dst_copy_metrics(new, &ort->dst); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 954 | rt->rt6i_idev = ort->rt6i_idev; |
| 955 | if (rt->rt6i_idev) |
| 956 | in6_dev_hold(rt->rt6i_idev); |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 957 | rt->dst.expires = 0; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 958 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 959 | rt->rt6i_gateway = ort->rt6i_gateway; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 960 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 961 | rt->rt6i_metric = 0; |
| 962 | |
| 963 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 964 | #ifdef CONFIG_IPV6_SUBTREES |
| 965 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 966 | #endif |
| 967 | |
| 968 | dst_free(new); |
| 969 | } |
| 970 | |
David S. Miller | 69ead7a | 2011-03-01 14:45:33 -0800 | [diff] [blame] | 971 | dst_release(dst_orig); |
| 972 | return new ? new : ERR_PTR(-ENOMEM); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 973 | } |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* |
| 976 | * Destination cache support functions |
| 977 | */ |
| 978 | |
| 979 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 980 | { |
| 981 | struct rt6_info *rt; |
| 982 | |
| 983 | rt = (struct rt6_info *) dst; |
| 984 | |
David S. Miller | 6431cbc | 2011-02-07 20:38:06 -0800 | [diff] [blame] | 985 | if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie)) { |
| 986 | if (rt->rt6i_peer_genid != rt6_peer_genid()) { |
| 987 | if (!rt->rt6i_peer) |
| 988 | rt6_bind_peer(rt, 0); |
| 989 | rt->rt6i_peer_genid = rt6_peer_genid(); |
| 990 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | return dst; |
David S. Miller | 6431cbc | 2011-02-07 20:38:06 -0800 | [diff] [blame] | 992 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | return NULL; |
| 994 | } |
| 995 | |
| 996 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 997 | { |
| 998 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 999 | |
| 1000 | if (rt) { |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1001 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1002 | if (rt6_check_expired(rt)) { |
| 1003 | ip6_del_rt(rt); |
| 1004 | dst = NULL; |
| 1005 | } |
| 1006 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | dst_release(dst); |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1008 | dst = NULL; |
| 1009 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 1011 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | static void ip6_link_failure(struct sk_buff *skb) |
| 1015 | { |
| 1016 | struct rt6_info *rt; |
| 1017 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1018 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1020 | rt = (struct rt6_info *) skb_dst(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | if (rt) { |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1022 | if (rt->rt6i_flags & RTF_CACHE) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1023 | dst_set_expires(&rt->dst, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | rt->rt6i_flags |= RTF_EXPIRES; |
| 1025 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) |
| 1026 | rt->rt6i_node->fn_sernum = -1; |
| 1027 | } |
| 1028 | } |
| 1029 | |
| 1030 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 1031 | { |
| 1032 | struct rt6_info *rt6 = (struct rt6_info*)dst; |
| 1033 | |
| 1034 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
| 1035 | rt6->rt6i_flags |= RTF_MODIFIED; |
| 1036 | if (mtu < IPV6_MIN_MTU) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1037 | u32 features = dst_metric(dst, RTAX_FEATURES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | mtu = IPV6_MIN_MTU; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1039 | features |= RTAX_FEATURE_ALLFRAG; |
| 1040 | dst_metric_set(dst, RTAX_FEATURES, features); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1042 | dst_metric_set(dst, RTAX_MTU, mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } |
| 1044 | } |
| 1045 | |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1046 | static unsigned int ip6_default_advmss(const struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | { |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 1048 | struct net_device *dev = dst->dev; |
| 1049 | unsigned int mtu = dst_mtu(dst); |
| 1050 | struct net *net = dev_net(dev); |
| 1051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 1053 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1054 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 1055 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
| 1057 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1058 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 1059 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 1060 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | * rely only on pmtu discovery" |
| 1062 | */ |
| 1063 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 1064 | mtu = IPV6_MAXPLEN; |
| 1065 | return mtu; |
| 1066 | } |
| 1067 | |
Steffen Klassert | ebb762f | 2011-11-23 02:12:51 +0000 | [diff] [blame] | 1068 | static unsigned int ip6_mtu(const struct dst_entry *dst) |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1069 | { |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1070 | struct inet6_dev *idev; |
Steffen Klassert | 618f9bc | 2011-11-23 02:13:31 +0000 | [diff] [blame] | 1071 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
| 1072 | |
| 1073 | if (mtu) |
| 1074 | return mtu; |
| 1075 | |
| 1076 | mtu = IPV6_MIN_MTU; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 1077 | |
| 1078 | rcu_read_lock(); |
| 1079 | idev = __in6_dev_get(dst->dev); |
| 1080 | if (idev) |
| 1081 | mtu = idev->cnf.mtu6; |
| 1082 | rcu_read_unlock(); |
| 1083 | |
| 1084 | return mtu; |
| 1085 | } |
| 1086 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1087 | static struct dst_entry *icmp6_dst_gc_list; |
| 1088 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1089 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1090 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | struct neighbour *neigh, |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1092 | struct flowi6 *fl6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1094 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | struct rt6_info *rt; |
| 1096 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1097 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1099 | if (unlikely(!idev)) |
Eric Dumazet | 122bdf6 | 2012-03-14 21:13:11 +0000 | [diff] [blame] | 1100 | return ERR_PTR(-ENODEV); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 1102 | rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev, 0); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1103 | if (unlikely(!rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | in6_dev_put(idev); |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1105 | dst = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | goto out; |
| 1107 | } |
| 1108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | if (neigh) |
| 1110 | neigh_hold(neigh); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1111 | else { |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 1112 | neigh = ip6_neigh_lookup(&rt->dst, &fl6->daddr); |
David S. Miller | b43faac | 2011-12-13 16:48:21 -0500 | [diff] [blame] | 1113 | if (IS_ERR(neigh)) { |
RongQing.Li | 252c3d8 | 2012-01-12 22:33:46 +0000 | [diff] [blame] | 1114 | in6_dev_put(idev); |
David S. Miller | b43faac | 2011-12-13 16:48:21 -0500 | [diff] [blame] | 1115 | dst_free(&rt->dst); |
| 1116 | return ERR_CAST(neigh); |
| 1117 | } |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1118 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1120 | rt->dst.flags |= DST_HOST; |
| 1121 | rt->dst.output = ip6_output; |
David S. Miller | 69cce1d | 2011-07-17 23:09:49 -0700 | [diff] [blame] | 1122 | dst_set_neighbour(&rt->dst, neigh); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1123 | atomic_set(&rt->dst.__refcnt, 1); |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1124 | rt->rt6i_dst.addr = fl6->daddr; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1125 | rt->rt6i_dst.plen = 128; |
| 1126 | rt->rt6i_idev = idev; |
Gao feng | 7011687 | 2011-10-28 02:46:57 +0000 | [diff] [blame] | 1127 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 255); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1129 | spin_lock_bh(&icmp6_dst_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1130 | rt->dst.next = icmp6_dst_gc_list; |
| 1131 | icmp6_dst_gc_list = &rt->dst; |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1132 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1134 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1136 | dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0); |
| 1137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | out: |
David S. Miller | 87a1157 | 2011-12-06 17:04:13 -0500 | [diff] [blame] | 1139 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1142 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | { |
Hagen Paul Pfeifer | e9476e9 | 2011-02-25 05:45:19 +0000 | [diff] [blame] | 1144 | struct dst_entry *dst, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1145 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1147 | spin_lock_bh(&icmp6_dst_lock); |
| 1148 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | while ((dst = *pprev) != NULL) { |
| 1151 | if (!atomic_read(&dst->__refcnt)) { |
| 1152 | *pprev = dst->next; |
| 1153 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | } else { |
| 1155 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1156 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | } |
| 1158 | } |
| 1159 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1160 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1161 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1162 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | } |
| 1164 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1165 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1166 | void *arg) |
| 1167 | { |
| 1168 | struct dst_entry *dst, **pprev; |
| 1169 | |
| 1170 | spin_lock_bh(&icmp6_dst_lock); |
| 1171 | pprev = &icmp6_dst_gc_list; |
| 1172 | while ((dst = *pprev) != NULL) { |
| 1173 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1174 | if (func(rt, arg)) { |
| 1175 | *pprev = dst->next; |
| 1176 | dst_free(dst); |
| 1177 | } else { |
| 1178 | pprev = &dst->next; |
| 1179 | } |
| 1180 | } |
| 1181 | spin_unlock_bh(&icmp6_dst_lock); |
| 1182 | } |
| 1183 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1184 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | unsigned long now = jiffies; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1187 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1188 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1189 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1190 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1191 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1192 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1193 | int entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1195 | entries = dst_entries_get_fast(ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1196 | if (time_after(rt_last_gc + rt_min_interval, now) && |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1197 | entries <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | goto out; |
| 1199 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1200 | net->ipv6.ip6_rt_gc_expire++; |
| 1201 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net); |
| 1202 | net->ipv6.ip6_rt_last_gc = now; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 1203 | entries = dst_entries_get_slow(ops); |
| 1204 | if (entries < ops->gc_thresh) |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1205 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1207 | 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] | 1208 | return entries > rt_max_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | |
| 1211 | /* Clean host part of a prefix. Not necessary in radix tree, |
| 1212 | but results in cleaner routing tables. |
| 1213 | |
| 1214 | Remove it only when all the things will work! |
| 1215 | */ |
| 1216 | |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1217 | int ip6_dst_hoplimit(struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | { |
David S. Miller | 5170ae8 | 2010-12-12 21:35:57 -0800 | [diff] [blame] | 1219 | int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT); |
David S. Miller | a02e4b7 | 2010-12-12 21:39:02 -0800 | [diff] [blame] | 1220 | if (hoplimit == 0) { |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1221 | struct net_device *dev = dst->dev; |
Eric Dumazet | c68f24c | 2010-06-14 04:46:20 +0000 | [diff] [blame] | 1222 | struct inet6_dev *idev; |
| 1223 | |
| 1224 | rcu_read_lock(); |
| 1225 | idev = __in6_dev_get(dev); |
| 1226 | if (idev) |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1227 | hoplimit = idev->cnf.hop_limit; |
Eric Dumazet | c68f24c | 2010-06-14 04:46:20 +0000 | [diff] [blame] | 1228 | else |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1229 | hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit; |
Eric Dumazet | c68f24c | 2010-06-14 04:46:20 +0000 | [diff] [blame] | 1230 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | } |
| 1232 | return hoplimit; |
| 1233 | } |
David S. Miller | abbf46a | 2010-12-12 21:14:46 -0800 | [diff] [blame] | 1234 | EXPORT_SYMBOL(ip6_dst_hoplimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | |
| 1236 | /* |
| 1237 | * |
| 1238 | */ |
| 1239 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1240 | int ip6_route_add(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | { |
| 1242 | int err; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1243 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | struct rt6_info *rt = NULL; |
| 1245 | struct net_device *dev = NULL; |
| 1246 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1247 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | int addr_type; |
| 1249 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1250 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | return -EINVAL; |
| 1252 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1253 | if (cfg->fc_src_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | return -EINVAL; |
| 1255 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1256 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1258 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | if (!dev) |
| 1260 | goto out; |
| 1261 | idev = in6_dev_get(dev); |
| 1262 | if (!idev) |
| 1263 | goto out; |
| 1264 | } |
| 1265 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1266 | if (cfg->fc_metric == 0) |
| 1267 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1269 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1270 | if (cfg->fc_nlinfo.nlh && |
| 1271 | !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) { |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1272 | table = fib6_get_table(net, cfg->fc_table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1273 | if (!table) { |
Matti Vaittinen | d71314b | 2011-11-14 00:14:49 +0000 | [diff] [blame] | 1274 | printk(KERN_WARNING "IPv6: NLM_F_CREATE should be specified when creating new route\n"); |
| 1275 | table = fib6_new_table(net, cfg->fc_table); |
| 1276 | } |
| 1277 | } else { |
| 1278 | table = fib6_new_table(net, cfg->fc_table); |
| 1279 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1280 | |
| 1281 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1282 | goto out; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1283 | |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 1284 | rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, NULL, DST_NOCOUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1286 | if (!rt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | err = -ENOMEM; |
| 1288 | goto out; |
| 1289 | } |
| 1290 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1291 | rt->dst.obsolete = -1; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1292 | rt->dst.expires = (cfg->fc_flags & RTF_EXPIRES) ? |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1293 | jiffies + clock_t_to_jiffies(cfg->fc_expires) : |
| 1294 | 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1296 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1297 | cfg->fc_protocol = RTPROT_BOOT; |
| 1298 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1299 | |
| 1300 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
| 1302 | if (addr_type & IPV6_ADDR_MULTICAST) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1303 | rt->dst.input = ip6_mc_input; |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 1304 | else if (cfg->fc_flags & RTF_LOCAL) |
| 1305 | rt->dst.input = ip6_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | else |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1307 | rt->dst.input = ip6_forward; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1309 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1311 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1312 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | if (rt->rt6i_dst.plen == 128) |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 1314 | rt->dst.flags |= DST_HOST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1316 | if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) { |
| 1317 | u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL); |
| 1318 | if (!metrics) { |
| 1319 | err = -ENOMEM; |
| 1320 | goto out; |
| 1321 | } |
| 1322 | dst_init_metrics(&rt->dst, metrics, 0); |
| 1323 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1325 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1326 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | #endif |
| 1328 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1329 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | |
| 1331 | /* We cannot add true routes via loopback here, |
| 1332 | they would result in kernel looping; promote them to reject routes |
| 1333 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1334 | if ((cfg->fc_flags & RTF_REJECT) || |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1335 | (dev && (dev->flags & IFF_LOOPBACK) && |
| 1336 | !(addr_type & IPV6_ADDR_LOOPBACK) && |
| 1337 | !(cfg->fc_flags & RTF_LOCAL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1339 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | if (dev) { |
| 1341 | dev_put(dev); |
| 1342 | in6_dev_put(idev); |
| 1343 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1344 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | dev_hold(dev); |
| 1346 | idev = in6_dev_get(dev); |
| 1347 | if (!idev) { |
| 1348 | err = -ENODEV; |
| 1349 | goto out; |
| 1350 | } |
| 1351 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1352 | rt->dst.output = ip6_pkt_discard_out; |
| 1353 | rt->dst.input = ip6_pkt_discard; |
| 1354 | rt->dst.error = -ENETUNREACH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
| 1356 | goto install_route; |
| 1357 | } |
| 1358 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1359 | if (cfg->fc_flags & RTF_GATEWAY) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1360 | const struct in6_addr *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | int gwa_type; |
| 1362 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1363 | gw_addr = &cfg->fc_gateway; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1364 | rt->rt6i_gateway = *gw_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | gwa_type = ipv6_addr_type(gw_addr); |
| 1366 | |
| 1367 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1368 | struct rt6_info *grt; |
| 1369 | |
| 1370 | /* IPv6 strictly inhibits using not link-local |
| 1371 | addresses as nexthop address. |
| 1372 | Otherwise, router will not able to send redirects. |
| 1373 | It is very good, but in some (rare!) circumstances |
| 1374 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1375 | some exceptions. --ANK |
| 1376 | */ |
| 1377 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1378 | if (!(gwa_type & IPV6_ADDR_UNICAST)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | goto out; |
| 1380 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1381 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
| 1383 | err = -EHOSTUNREACH; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1384 | if (!grt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | goto out; |
| 1386 | if (dev) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1387 | if (dev != grt->dst.dev) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1388 | dst_release(&grt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | goto out; |
| 1390 | } |
| 1391 | } else { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1392 | dev = grt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | idev = grt->rt6i_idev; |
| 1394 | dev_hold(dev); |
| 1395 | in6_dev_hold(grt->rt6i_idev); |
| 1396 | } |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1397 | if (!(grt->rt6i_flags & RTF_GATEWAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | err = 0; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1399 | dst_release(&grt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
| 1401 | if (err) |
| 1402 | goto out; |
| 1403 | } |
| 1404 | err = -EINVAL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1405 | if (!dev || (dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | goto out; |
| 1407 | } |
| 1408 | |
| 1409 | err = -ENODEV; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1410 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | goto out; |
| 1412 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1413 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) { |
| 1414 | if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { |
| 1415 | err = -EINVAL; |
| 1416 | goto out; |
| 1417 | } |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1418 | rt->rt6i_prefsrc.addr = cfg->fc_prefsrc; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1419 | rt->rt6i_prefsrc.plen = 128; |
| 1420 | } else |
| 1421 | rt->rt6i_prefsrc.plen = 0; |
| 1422 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1423 | if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { |
David S. Miller | 8ade06c | 2011-12-29 18:51:57 -0500 | [diff] [blame] | 1424 | err = rt6_bind_neighbour(rt, dev); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 1425 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | } |
| 1428 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1429 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | |
| 1431 | install_route: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1432 | if (cfg->fc_mx) { |
| 1433 | struct nlattr *nla; |
| 1434 | int remaining; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1436 | 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] | 1437 | int type = nla_type(nla); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1438 | |
| 1439 | if (type) { |
| 1440 | if (type > RTAX_MAX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | err = -EINVAL; |
| 1442 | goto out; |
| 1443 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1444 | |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1445 | dst_metric_set(&rt->dst, type, nla_get_u32(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | } |
| 1448 | } |
| 1449 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1450 | rt->dst.dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1452 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1453 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1454 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1455 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1456 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | out: |
| 1459 | if (dev) |
| 1460 | dev_put(dev); |
| 1461 | if (idev) |
| 1462 | in6_dev_put(idev); |
| 1463 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1464 | dst_free(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | return err; |
| 1466 | } |
| 1467 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1468 | 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] | 1469 | { |
| 1470 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1471 | struct fib6_table *table; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1472 | struct net *net = dev_net(rt->dst.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1474 | if (rt == net->ipv6.ip6_null_entry) |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 1475 | return -ENOENT; |
| 1476 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1477 | table = rt->rt6i_table; |
| 1478 | write_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1480 | err = fib6_del(rt, info); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1481 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1483 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
| 1485 | return err; |
| 1486 | } |
| 1487 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1488 | int ip6_del_rt(struct rt6_info *rt) |
| 1489 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1490 | struct nl_info info = { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1491 | .nl_net = dev_net(rt->dst.dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1492 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 1493 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1494 | } |
| 1495 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1496 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1498 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | struct fib6_node *fn; |
| 1500 | struct rt6_info *rt; |
| 1501 | int err = -ESRCH; |
| 1502 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1503 | 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] | 1504 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1505 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1507 | read_lock_bh(&table->tb6_lock); |
| 1508 | |
| 1509 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1510 | &cfg->fc_dst, cfg->fc_dst_len, |
| 1511 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | if (fn) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1514 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1515 | if (cfg->fc_ifindex && |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1516 | (!rt->dst.dev || |
| 1517 | rt->dst.dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1519 | if (cfg->fc_flags & RTF_GATEWAY && |
| 1520 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1522 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1524 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1525 | read_unlock_bh(&table->tb6_lock); |
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 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | } |
| 1529 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1530 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | |
| 1532 | return err; |
| 1533 | } |
| 1534 | |
| 1535 | /* |
| 1536 | * Handle redirects |
| 1537 | */ |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1538 | struct ip6rd_flowi { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1539 | struct flowi6 fl6; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1540 | struct in6_addr gateway; |
| 1541 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1543 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1544 | struct fib6_table *table, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1545 | struct flowi6 *fl6, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1546 | int flags) |
| 1547 | { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1548 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1549 | struct rt6_info *rt; |
| 1550 | struct fib6_node *fn; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | /* |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1553 | * Get the "current" route for this destination and |
| 1554 | * check if the redirect has come from approriate router. |
| 1555 | * |
| 1556 | * RFC 2461 specifies that redirects should only be |
| 1557 | * accepted if they come from the nexthop to the target. |
| 1558 | * Due to the way the routes are chosen, this notion |
| 1559 | * is a bit fuzzy and one might need to check all possible |
| 1560 | * routes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1563 | read_lock_bh(&table->tb6_lock); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1564 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1565 | restart: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1566 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1567 | /* |
| 1568 | * Current route is on-link; redirect is always invalid. |
| 1569 | * |
| 1570 | * Seems, previous statement is not true. It could |
| 1571 | * be node, which looks for us as on-link (f.e. proxy ndisc) |
| 1572 | * But then router serving it might decide, that we should |
| 1573 | * know truth 8)8) --ANK (980726). |
| 1574 | */ |
| 1575 | if (rt6_check_expired(rt)) |
| 1576 | continue; |
| 1577 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1578 | continue; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1579 | if (fl6->flowi6_oif != rt->dst.dev->ifindex) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1580 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1581 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1582 | continue; |
| 1583 | break; |
| 1584 | } |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1585 | |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1586 | if (!rt) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1587 | rt = net->ipv6.ip6_null_entry; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1588 | BACKTRACK(net, &fl6->saddr); |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1589 | out: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1590 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1591 | |
| 1592 | read_unlock_bh(&table->tb6_lock); |
| 1593 | |
| 1594 | return rt; |
| 1595 | }; |
| 1596 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1597 | static struct rt6_info *ip6_route_redirect(const struct in6_addr *dest, |
| 1598 | const struct in6_addr *src, |
| 1599 | const struct in6_addr *gateway, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1600 | struct net_device *dev) |
| 1601 | { |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1602 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1603 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1604 | struct ip6rd_flowi rdfl = { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1605 | .fl6 = { |
| 1606 | .flowi6_oif = dev->ifindex, |
| 1607 | .daddr = *dest, |
| 1608 | .saddr = *src, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1609 | }, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1610 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1611 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1612 | rdfl.gateway = *gateway; |
Brian Haley | 86c36ce | 2009-10-07 13:58:01 -0700 | [diff] [blame] | 1613 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1614 | if (rt6_need_strict(dest)) |
| 1615 | flags |= RT6_LOOKUP_F_IFACE; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1616 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1617 | return (struct rt6_info *)fib6_rule_lookup(net, &rdfl.fl6, |
Daniel Lezcano | 58f09b7 | 2008-03-03 23:25:27 -0800 | [diff] [blame] | 1618 | flags, __ip6_route_redirect); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1619 | } |
| 1620 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1621 | void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src, |
| 1622 | const struct in6_addr *saddr, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1623 | struct neighbour *neigh, u8 *lladdr, int on_link) |
| 1624 | { |
| 1625 | struct rt6_info *rt, *nrt = NULL; |
| 1626 | struct netevent_redirect netevent; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1627 | struct net *net = dev_net(neigh->dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1628 | |
| 1629 | rt = ip6_route_redirect(dest, src, saddr, neigh->dev); |
| 1630 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1631 | if (rt == net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | if (net_ratelimit()) |
| 1633 | printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop " |
| 1634 | "for redirect target\n"); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1635 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | } |
| 1637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | /* |
| 1639 | * We have finally decided to accept it. |
| 1640 | */ |
| 1641 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1642 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 1644 | NEIGH_UPDATE_F_OVERRIDE| |
| 1645 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 1646 | NEIGH_UPDATE_F_ISROUTER)) |
| 1647 | ); |
| 1648 | |
| 1649 | /* |
| 1650 | * Redirect received -> path was valid. |
| 1651 | * Look, redirects are sent only in response to data packets, |
| 1652 | * so that this nexthop apparently is reachable. --ANK |
| 1653 | */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1654 | dst_confirm(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | |
| 1656 | /* Duplicate redirect: silently ignore. */ |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 1657 | if (neigh == dst_get_neighbour_noref_raw(&rt->dst)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | goto out; |
| 1659 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 1660 | nrt = ip6_rt_copy(rt, dest); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1661 | if (!nrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | goto out; |
| 1663 | |
| 1664 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 1665 | if (on_link) |
| 1666 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 1667 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1668 | nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key; |
David S. Miller | 69cce1d | 2011-07-17 23:09:49 -0700 | [diff] [blame] | 1669 | dst_set_neighbour(&nrt->dst, neigh_clone(neigh)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1671 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | goto out; |
| 1673 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1674 | netevent.old = &rt->dst; |
| 1675 | netevent.new = &nrt->dst; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 1676 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 1677 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1678 | if (rt->rt6i_flags & RTF_CACHE) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1679 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | return; |
| 1681 | } |
| 1682 | |
| 1683 | out: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1684 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | } |
| 1686 | |
| 1687 | /* |
| 1688 | * Handle ICMP "packet too big" messages |
| 1689 | * i.e. Path MTU discovery |
| 1690 | */ |
| 1691 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1692 | static void rt6_do_pmtu_disc(const struct in6_addr *daddr, const struct in6_addr *saddr, |
Maciej Żenczykowski | ae878ae | 2010-10-03 14:49:00 -0700 | [diff] [blame] | 1693 | struct net *net, u32 pmtu, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | { |
| 1695 | struct rt6_info *rt, *nrt; |
| 1696 | int allfrag = 0; |
Andrey Vagin | d3052b5 | 2010-12-11 15:20:11 +0000 | [diff] [blame] | 1697 | again: |
Maciej Żenczykowski | ae878ae | 2010-10-03 14:49:00 -0700 | [diff] [blame] | 1698 | rt = rt6_lookup(net, daddr, saddr, ifindex, 0); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1699 | if (!rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | return; |
| 1701 | |
Andrey Vagin | d3052b5 | 2010-12-11 15:20:11 +0000 | [diff] [blame] | 1702 | if (rt6_check_expired(rt)) { |
| 1703 | ip6_del_rt(rt); |
| 1704 | goto again; |
| 1705 | } |
| 1706 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1707 | if (pmtu >= dst_mtu(&rt->dst)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | goto out; |
| 1709 | |
| 1710 | if (pmtu < IPV6_MIN_MTU) { |
| 1711 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1712 | * According to RFC2460, PMTU is set to the IPv6 Minimum Link |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | * MTU (1280) and a fragment header should always be included |
| 1714 | * after a node receiving Too Big message reporting PMTU is |
| 1715 | * less than the IPv6 Minimum Link MTU. |
| 1716 | */ |
| 1717 | pmtu = IPV6_MIN_MTU; |
| 1718 | allfrag = 1; |
| 1719 | } |
| 1720 | |
| 1721 | /* New mtu received -> path was valid. |
| 1722 | They are sent only in response to data packets, |
| 1723 | so that this nexthop apparently is reachable. --ANK |
| 1724 | */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1725 | dst_confirm(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | |
| 1727 | /* Host route. If it is static, it would be better |
| 1728 | not to override it, but add new one, so that |
| 1729 | when cache entry will expire old pmtu |
| 1730 | would return automatically. |
| 1731 | */ |
| 1732 | if (rt->rt6i_flags & RTF_CACHE) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1733 | dst_metric_set(&rt->dst, RTAX_MTU, pmtu); |
| 1734 | if (allfrag) { |
| 1735 | u32 features = dst_metric(&rt->dst, RTAX_FEATURES); |
| 1736 | features |= RTAX_FEATURE_ALLFRAG; |
| 1737 | dst_metric_set(&rt->dst, RTAX_FEATURES, features); |
| 1738 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1739 | dst_set_expires(&rt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES; |
| 1741 | goto out; |
| 1742 | } |
| 1743 | |
| 1744 | /* Network route. |
| 1745 | Two cases are possible: |
| 1746 | 1. It is connected route. Action: COW |
| 1747 | 2. It is gatewayed route or NONEXTHOP route. Action: clone it. |
| 1748 | */ |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 1749 | if (!dst_get_neighbour_noref_raw(&rt->dst) && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1750 | nrt = rt6_alloc_cow(rt, daddr, saddr); |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1751 | else |
| 1752 | nrt = rt6_alloc_clone(rt, daddr); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1753 | |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1754 | if (nrt) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1755 | dst_metric_set(&nrt->dst, RTAX_MTU, pmtu); |
| 1756 | if (allfrag) { |
| 1757 | u32 features = dst_metric(&nrt->dst, RTAX_FEATURES); |
| 1758 | features |= RTAX_FEATURE_ALLFRAG; |
| 1759 | dst_metric_set(&nrt->dst, RTAX_FEATURES, features); |
| 1760 | } |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1761 | |
| 1762 | /* According to RFC 1981, detecting PMTU increase shouldn't be |
| 1763 | * happened within 5 mins, the recommended timer is 10 mins. |
| 1764 | * Here this route expiration time is set to ip6_rt_mtu_expires |
| 1765 | * which is 10 mins. After 10 mins the decreased pmtu is expired |
| 1766 | * and detecting PMTU increase will be automatically happened. |
| 1767 | */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1768 | dst_set_expires(&nrt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1769 | nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; |
| 1770 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1771 | ip6_ins_rt(nrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | out: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1774 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | } |
| 1776 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1777 | void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *saddr, |
Maciej Żenczykowski | ae878ae | 2010-10-03 14:49:00 -0700 | [diff] [blame] | 1778 | struct net_device *dev, u32 pmtu) |
| 1779 | { |
| 1780 | struct net *net = dev_net(dev); |
| 1781 | |
| 1782 | /* |
| 1783 | * RFC 1981 states that a node "MUST reduce the size of the packets it |
| 1784 | * is sending along the path" that caused the Packet Too Big message. |
| 1785 | * Since it's not possible in the general case to determine which |
| 1786 | * interface was used to send the original packet, we update the MTU |
| 1787 | * on the interface that will be used to send future packets. We also |
| 1788 | * update the MTU on the interface that received the Packet Too Big in |
| 1789 | * case the original packet was forced out that interface with |
| 1790 | * SO_BINDTODEVICE or similar. This is the next best thing to the |
| 1791 | * correct behaviour, which would be to update the MTU on all |
| 1792 | * interfaces. |
| 1793 | */ |
| 1794 | rt6_do_pmtu_disc(daddr, saddr, net, pmtu, 0); |
| 1795 | rt6_do_pmtu_disc(daddr, saddr, net, pmtu, dev->ifindex); |
| 1796 | } |
| 1797 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | /* |
| 1799 | * Misc support functions |
| 1800 | */ |
| 1801 | |
Eric Dumazet | 21efcfa | 2011-07-19 20:18:36 +0000 | [diff] [blame] | 1802 | static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort, |
| 1803 | const struct in6_addr *dest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1805 | struct net *net = dev_net(ort->dst.dev); |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 1806 | struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 1807 | ort->dst.dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | |
| 1809 | if (rt) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1810 | rt->dst.input = ort->dst.input; |
| 1811 | rt->dst.output = ort->dst.output; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1812 | rt->dst.flags |= DST_HOST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1814 | rt->rt6i_dst.addr = *dest; |
Yan, Zheng | 8e2ec63 | 2011-09-05 21:34:30 +0000 | [diff] [blame] | 1815 | rt->rt6i_dst.plen = 128; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1816 | dst_copy_metrics(&rt->dst, &ort->dst); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1817 | rt->dst.error = ort->dst.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | rt->rt6i_idev = ort->rt6i_idev; |
| 1819 | if (rt->rt6i_idev) |
| 1820 | in6_dev_hold(rt->rt6i_idev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1821 | rt->dst.lastuse = jiffies; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1822 | rt->dst.expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1824 | rt->rt6i_gateway = ort->rt6i_gateway; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 1826 | rt->rt6i_metric = 0; |
| 1827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | #ifdef CONFIG_IPV6_SUBTREES |
| 1829 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1830 | #endif |
Florian Westphal | 0f6c639 | 2011-05-20 11:27:24 +0000 | [diff] [blame] | 1831 | memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1832 | rt->rt6i_table = ort->rt6i_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | } |
| 1834 | return rt; |
| 1835 | } |
| 1836 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1837 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1838 | static struct rt6_info *rt6_get_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1839 | const struct in6_addr *prefix, int prefixlen, |
| 1840 | const struct in6_addr *gwaddr, int ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1841 | { |
| 1842 | struct fib6_node *fn; |
| 1843 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1844 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1845 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1846 | table = fib6_get_table(net, RT6_TABLE_INFO); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1847 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1848 | return NULL; |
| 1849 | |
| 1850 | write_lock_bh(&table->tb6_lock); |
| 1851 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1852 | if (!fn) |
| 1853 | goto out; |
| 1854 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1855 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1856 | if (rt->dst.dev->ifindex != ifindex) |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1857 | continue; |
| 1858 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 1859 | continue; |
| 1860 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 1861 | continue; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1862 | dst_hold(&rt->dst); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1863 | break; |
| 1864 | } |
| 1865 | out: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1866 | write_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1867 | return rt; |
| 1868 | } |
| 1869 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1870 | static struct rt6_info *rt6_add_route_info(struct net *net, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1871 | const struct in6_addr *prefix, int prefixlen, |
| 1872 | const struct in6_addr *gwaddr, int ifindex, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1873 | unsigned pref) |
| 1874 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1875 | struct fib6_config cfg = { |
| 1876 | .fc_table = RT6_TABLE_INFO, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1877 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1878 | .fc_ifindex = ifindex, |
| 1879 | .fc_dst_len = prefixlen, |
| 1880 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 1881 | RTF_UP | RTF_PREF(pref), |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1882 | .fc_nlinfo.pid = 0, |
| 1883 | .fc_nlinfo.nlh = NULL, |
| 1884 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1885 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1886 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1887 | cfg.fc_dst = *prefix; |
| 1888 | cfg.fc_gateway = *gwaddr; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1889 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 1890 | /* We should treat it as a default route if prefix length is 0. */ |
| 1891 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1892 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1893 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1894 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1895 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1896 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1897 | } |
| 1898 | #endif |
| 1899 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1900 | 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] | 1901 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1903 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1905 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1906 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1907 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1909 | write_lock_bh(&table->tb6_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1910 | 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] | 1911 | if (dev == rt->dst.dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 1912 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 1914 | break; |
| 1915 | } |
| 1916 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1917 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1918 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | return rt; |
| 1920 | } |
| 1921 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1922 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 1923 | struct net_device *dev, |
| 1924 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1926 | struct fib6_config cfg = { |
| 1927 | .fc_table = RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1928 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1929 | .fc_ifindex = dev->ifindex, |
| 1930 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 1931 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1932 | .fc_nlinfo.pid = 0, |
| 1933 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1934 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1935 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1937 | cfg.fc_gateway = *gwaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1939 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | return rt6_get_dflt_router(gwaddr, dev); |
| 1942 | } |
| 1943 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1944 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | { |
| 1946 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1947 | struct fib6_table *table; |
| 1948 | |
| 1949 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1950 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 1951 | if (!table) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1952 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | |
| 1954 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1955 | read_lock_bh(&table->tb6_lock); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1956 | for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1958 | dst_hold(&rt->dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1959 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1960 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | goto restart; |
| 1962 | } |
| 1963 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1964 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | } |
| 1966 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1967 | static void rtmsg_to_fib6_config(struct net *net, |
| 1968 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1969 | struct fib6_config *cfg) |
| 1970 | { |
| 1971 | memset(cfg, 0, sizeof(*cfg)); |
| 1972 | |
| 1973 | cfg->fc_table = RT6_TABLE_MAIN; |
| 1974 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 1975 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 1976 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 1977 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 1978 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 1979 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 1980 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1981 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 1982 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1983 | cfg->fc_dst = rtmsg->rtmsg_dst; |
| 1984 | cfg->fc_src = rtmsg->rtmsg_src; |
| 1985 | cfg->fc_gateway = rtmsg->rtmsg_gateway; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1986 | } |
| 1987 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1988 | 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] | 1989 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1990 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | struct in6_rtmsg rtmsg; |
| 1992 | int err; |
| 1993 | |
| 1994 | switch(cmd) { |
| 1995 | case SIOCADDRT: /* Add a route */ |
| 1996 | case SIOCDELRT: /* Delete a route */ |
| 1997 | if (!capable(CAP_NET_ADMIN)) |
| 1998 | return -EPERM; |
| 1999 | err = copy_from_user(&rtmsg, arg, |
| 2000 | sizeof(struct in6_rtmsg)); |
| 2001 | if (err) |
| 2002 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2003 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2004 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | rtnl_lock(); |
| 2007 | switch (cmd) { |
| 2008 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2009 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | break; |
| 2011 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2012 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | break; |
| 2014 | default: |
| 2015 | err = -EINVAL; |
| 2016 | } |
| 2017 | rtnl_unlock(); |
| 2018 | |
| 2019 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2020 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | |
| 2022 | return -EINVAL; |
| 2023 | } |
| 2024 | |
| 2025 | /* |
| 2026 | * Drop the packet on the floor |
| 2027 | */ |
| 2028 | |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 2029 | 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] | 2030 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2031 | int type; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2032 | struct dst_entry *dst = skb_dst(skb); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2033 | switch (ipstats_mib_noroutes) { |
| 2034 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 2035 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 2036 | if (type == IPV6_ADDR_ANY) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2037 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2038 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2039 | break; |
| 2040 | } |
| 2041 | /* FALLTHROUGH */ |
| 2042 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 2043 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 2044 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2045 | break; |
| 2046 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 2047 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | kfree_skb(skb); |
| 2049 | return 0; |
| 2050 | } |
| 2051 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2052 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 2053 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2054 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2055 | } |
| 2056 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2057 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2059 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2060 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | } |
| 2062 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 2063 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2064 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2065 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 2066 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2067 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2068 | } |
| 2069 | |
| 2070 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) |
| 2071 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2072 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 2073 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 2074 | } |
| 2075 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 2076 | #endif |
| 2077 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | /* |
| 2079 | * Allocate a dst for local (unicast / anycast) address. |
| 2080 | */ |
| 2081 | |
| 2082 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 2083 | const struct in6_addr *addr, |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 2084 | bool anycast) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2086 | struct net *net = dev_net(idev->dev); |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 2087 | struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, |
David S. Miller | 957c665 | 2011-06-24 15:25:00 -0700 | [diff] [blame] | 2088 | net->loopback_dev, 0); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 2089 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2091 | if (!rt) { |
Ben Greear | 4038565 | 2010-11-08 12:33:48 +0000 | [diff] [blame] | 2092 | if (net_ratelimit()) |
| 2093 | pr_warning("IPv6: Maximum number of routes reached," |
| 2094 | " consider increasing route/max_size.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | return ERR_PTR(-ENOMEM); |
Ben Greear | 4038565 | 2010-11-08 12:33:48 +0000 | [diff] [blame] | 2096 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | in6_dev_hold(idev); |
| 2099 | |
David S. Miller | 11d53b4 | 2011-06-24 15:23:34 -0700 | [diff] [blame] | 2100 | rt->dst.flags |= DST_HOST; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2101 | rt->dst.input = ip6_input; |
| 2102 | rt->dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | rt->rt6i_idev = idev; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2104 | rt->dst.obsolete = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | |
| 2106 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 2107 | if (anycast) |
| 2108 | rt->rt6i_flags |= RTF_ANYCAST; |
| 2109 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | rt->rt6i_flags |= RTF_LOCAL; |
David S. Miller | 8ade06c | 2011-12-29 18:51:57 -0500 | [diff] [blame] | 2111 | err = rt6_bind_neighbour(rt, rt->dst.dev); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 2112 | if (err) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2113 | dst_free(&rt->dst); |
David S. Miller | f83c779 | 2011-12-28 15:41:23 -0500 | [diff] [blame] | 2114 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2117 | rt->rt6i_dst.addr = *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | rt->rt6i_dst.plen = 128; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2119 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2121 | atomic_set(&rt->dst.__refcnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | |
| 2123 | return rt; |
| 2124 | } |
| 2125 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2126 | int ip6_route_get_saddr(struct net *net, |
| 2127 | struct rt6_info *rt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2128 | const struct in6_addr *daddr, |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2129 | unsigned int prefs, |
| 2130 | struct in6_addr *saddr) |
| 2131 | { |
| 2132 | struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt); |
| 2133 | int err = 0; |
| 2134 | if (rt->rt6i_prefsrc.plen) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2135 | *saddr = rt->rt6i_prefsrc.addr; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2136 | else |
| 2137 | err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
| 2138 | daddr, prefs, saddr); |
| 2139 | return err; |
| 2140 | } |
| 2141 | |
| 2142 | /* remove deleted ip from prefsrc entries */ |
| 2143 | struct arg_dev_net_ip { |
| 2144 | struct net_device *dev; |
| 2145 | struct net *net; |
| 2146 | struct in6_addr *addr; |
| 2147 | }; |
| 2148 | |
| 2149 | static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) |
| 2150 | { |
| 2151 | struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; |
| 2152 | struct net *net = ((struct arg_dev_net_ip *)arg)->net; |
| 2153 | struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; |
| 2154 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2155 | if (((void *)rt->dst.dev == dev || !dev) && |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2156 | rt != net->ipv6.ip6_null_entry && |
| 2157 | ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { |
| 2158 | /* remove prefsrc entry */ |
| 2159 | rt->rt6i_prefsrc.plen = 0; |
| 2160 | } |
| 2161 | return 0; |
| 2162 | } |
| 2163 | |
| 2164 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) |
| 2165 | { |
| 2166 | struct net *net = dev_net(ifp->idev->dev); |
| 2167 | struct arg_dev_net_ip adni = { |
| 2168 | .dev = ifp->idev->dev, |
| 2169 | .net = net, |
| 2170 | .addr = &ifp->addr, |
| 2171 | }; |
| 2172 | fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni); |
| 2173 | } |
| 2174 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2175 | struct arg_dev_net { |
| 2176 | struct net_device *dev; |
| 2177 | struct net *net; |
| 2178 | }; |
| 2179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 2181 | { |
stephen hemminger | bc3ef66 | 2010-12-16 17:42:40 +0000 | [diff] [blame] | 2182 | const struct arg_dev_net *adn = arg; |
| 2183 | const struct net_device *dev = adn->dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2184 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2185 | if ((rt->dst.dev == dev || !dev) && |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2186 | rt != adn->net->ipv6.ip6_null_entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | return -1; |
David S. Miller | c159d30 | 2011-12-26 15:24:36 -0500 | [diff] [blame] | 2188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | return 0; |
| 2190 | } |
| 2191 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2192 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2194 | struct arg_dev_net adn = { |
| 2195 | .dev = dev, |
| 2196 | .net = net, |
| 2197 | }; |
| 2198 | |
| 2199 | fib6_clean_all(net, fib6_ifdown, 0, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 2200 | icmp6_clean_all(fib6_ifdown, &adn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | } |
| 2202 | |
| 2203 | struct rt6_mtu_change_arg |
| 2204 | { |
| 2205 | struct net_device *dev; |
| 2206 | unsigned mtu; |
| 2207 | }; |
| 2208 | |
| 2209 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 2210 | { |
| 2211 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 2212 | struct inet6_dev *idev; |
| 2213 | |
| 2214 | /* In IPv6 pmtu discovery is not optional, |
| 2215 | so that RTAX_MTU lock cannot disable it. |
| 2216 | We still use this lock to block changes |
| 2217 | caused by addrconf/ndisc. |
| 2218 | */ |
| 2219 | |
| 2220 | idev = __in6_dev_get(arg->dev); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2221 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | return 0; |
| 2223 | |
| 2224 | /* For administrative MTU increase, there is no way to discover |
| 2225 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 2226 | Since RFC 1981 doesn't include administrative MTU increase |
| 2227 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 2228 | */ |
| 2229 | /* |
| 2230 | If new MTU is less than route PMTU, this new MTU will be the |
| 2231 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 2232 | decreases; if new MTU is greater than route PMTU, and the |
| 2233 | old MTU is the lowest MTU in the path, update the route PMTU |
| 2234 | to reflect the increase. In this case if the other nodes' MTU |
| 2235 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 2236 | PMTU discouvery. |
| 2237 | */ |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2238 | if (rt->dst.dev == arg->dev && |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2239 | !dst_metric_locked(&rt->dst, RTAX_MTU) && |
| 2240 | (dst_mtu(&rt->dst) >= arg->mtu || |
| 2241 | (dst_mtu(&rt->dst) < arg->mtu && |
| 2242 | dst_mtu(&rt->dst) == idev->cnf.mtu6))) { |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2243 | dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu); |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2244 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | return 0; |
| 2246 | } |
| 2247 | |
| 2248 | void rt6_mtu_change(struct net_device *dev, unsigned mtu) |
| 2249 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2250 | struct rt6_mtu_change_arg arg = { |
| 2251 | .dev = dev, |
| 2252 | .mtu = mtu, |
| 2253 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2255 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | } |
| 2257 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2258 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2259 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2260 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2261 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2262 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2263 | [RTA_METRICS] = { .type = NLA_NESTED }, |
| 2264 | }; |
| 2265 | |
| 2266 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2267 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2269 | struct rtmsg *rtm; |
| 2270 | struct nlattr *tb[RTA_MAX+1]; |
| 2271 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2273 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2274 | if (err < 0) |
| 2275 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2277 | err = -EINVAL; |
| 2278 | rtm = nlmsg_data(nlh); |
| 2279 | memset(cfg, 0, sizeof(*cfg)); |
| 2280 | |
| 2281 | cfg->fc_table = rtm->rtm_table; |
| 2282 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2283 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2284 | cfg->fc_flags = RTF_UP; |
| 2285 | cfg->fc_protocol = rtm->rtm_protocol; |
| 2286 | |
| 2287 | if (rtm->rtm_type == RTN_UNREACHABLE) |
| 2288 | cfg->fc_flags |= RTF_REJECT; |
| 2289 | |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2290 | if (rtm->rtm_type == RTN_LOCAL) |
| 2291 | cfg->fc_flags |= RTF_LOCAL; |
| 2292 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2293 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; |
| 2294 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2295 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2296 | |
| 2297 | if (tb[RTA_GATEWAY]) { |
| 2298 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); |
| 2299 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2301 | |
| 2302 | if (tb[RTA_DST]) { |
| 2303 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2304 | |
| 2305 | if (nla_len(tb[RTA_DST]) < plen) |
| 2306 | goto errout; |
| 2307 | |
| 2308 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2310 | |
| 2311 | if (tb[RTA_SRC]) { |
| 2312 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2313 | |
| 2314 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2315 | goto errout; |
| 2316 | |
| 2317 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2319 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2320 | if (tb[RTA_PREFSRC]) |
| 2321 | nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16); |
| 2322 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2323 | if (tb[RTA_OIF]) |
| 2324 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2325 | |
| 2326 | if (tb[RTA_PRIORITY]) |
| 2327 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2328 | |
| 2329 | if (tb[RTA_METRICS]) { |
| 2330 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2331 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2333 | |
| 2334 | if (tb[RTA_TABLE]) |
| 2335 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2336 | |
| 2337 | err = 0; |
| 2338 | errout: |
| 2339 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | } |
| 2341 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2342 | static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
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 fib6_config cfg; |
| 2345 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2347 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2348 | if (err < 0) |
| 2349 | return err; |
| 2350 | |
| 2351 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | } |
| 2353 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2354 | static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2356 | struct fib6_config cfg; |
| 2357 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2359 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2360 | if (err < 0) |
| 2361 | return err; |
| 2362 | |
| 2363 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | } |
| 2365 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2366 | static inline size_t rt6_nlmsg_size(void) |
| 2367 | { |
| 2368 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2369 | + nla_total_size(16) /* RTA_SRC */ |
| 2370 | + nla_total_size(16) /* RTA_DST */ |
| 2371 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 2372 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 2373 | + nla_total_size(4) /* RTA_TABLE */ |
| 2374 | + nla_total_size(4) /* RTA_IIF */ |
| 2375 | + nla_total_size(4) /* RTA_OIF */ |
| 2376 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 2377 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2378 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
| 2379 | } |
| 2380 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2381 | static int rt6_fill_node(struct net *net, |
| 2382 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 2383 | struct in6_addr *dst, struct in6_addr *src, |
| 2384 | int iif, int type, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2385 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | { |
David S. Miller | 346f870 | 2011-12-29 15:22:33 -0500 | [diff] [blame] | 2387 | const struct inet_peer *peer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2389 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2390 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2391 | u32 table; |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 2392 | struct neighbour *n; |
David S. Miller | 346f870 | 2011-12-29 15:22:33 -0500 | [diff] [blame] | 2393 | u32 ts, tsage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | |
| 2395 | if (prefix) { /* user wants prefix routes only */ |
| 2396 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 2397 | /* success since this is not a prefix route */ |
| 2398 | return 1; |
| 2399 | } |
| 2400 | } |
| 2401 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2402 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2403 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2404 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2405 | |
| 2406 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | rtm->rtm_family = AF_INET6; |
| 2408 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 2409 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 2410 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2411 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2412 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2413 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2414 | table = RT6_TABLE_UNSPEC; |
| 2415 | rtm->rtm_table = table; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2416 | NLA_PUT_U32(skb, RTA_TABLE, table); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2417 | if (rt->rt6i_flags & RTF_REJECT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | rtm->rtm_type = RTN_UNREACHABLE; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2419 | else if (rt->rt6i_flags & RTF_LOCAL) |
Maciej Żenczykowski | ab79ad1 | 2010-09-27 00:07:02 +0000 | [diff] [blame] | 2420 | rtm->rtm_type = RTN_LOCAL; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2421 | else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | rtm->rtm_type = RTN_LOCAL; |
| 2423 | else |
| 2424 | rtm->rtm_type = RTN_UNICAST; |
| 2425 | rtm->rtm_flags = 0; |
| 2426 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 2427 | rtm->rtm_protocol = rt->rt6i_protocol; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2428 | if (rt->rt6i_flags & RTF_DYNAMIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | rtm->rtm_protocol = RTPROT_REDIRECT; |
| 2430 | else if (rt->rt6i_flags & RTF_ADDRCONF) |
| 2431 | rtm->rtm_protocol = RTPROT_KERNEL; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2432 | else if (rt->rt6i_flags & RTF_DEFAULT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | rtm->rtm_protocol = RTPROT_RA; |
| 2434 | |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2435 | if (rt->rt6i_flags & RTF_CACHE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | rtm->rtm_flags |= RTM_F_CLONED; |
| 2437 | |
| 2438 | if (dst) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2439 | NLA_PUT(skb, RTA_DST, 16, dst); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2440 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | } else if (rtm->rtm_dst_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2442 | NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | #ifdef CONFIG_IPV6_SUBTREES |
| 2444 | if (src) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2445 | NLA_PUT(skb, RTA_SRC, 16, src); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2446 | rtm->rtm_src_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | } else if (rtm->rtm_src_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2448 | NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2450 | if (iif) { |
| 2451 | #ifdef CONFIG_IPV6_MROUTE |
| 2452 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2453 | int err = ip6mr_get_route(net, skb, rtm, nowait); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2454 | if (err <= 0) { |
| 2455 | if (!nowait) { |
| 2456 | if (err == 0) |
| 2457 | return 0; |
| 2458 | goto nla_put_failure; |
| 2459 | } else { |
| 2460 | if (err == -EMSGSIZE) |
| 2461 | goto nla_put_failure; |
| 2462 | } |
| 2463 | } |
| 2464 | } else |
| 2465 | #endif |
| 2466 | NLA_PUT_U32(skb, RTA_IIF, iif); |
| 2467 | } else if (dst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | struct in6_addr saddr_buf; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2469 | if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2470 | NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2472 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2473 | if (rt->rt6i_prefsrc.plen) { |
| 2474 | struct in6_addr saddr_buf; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2475 | saddr_buf = rt->rt6i_prefsrc.addr; |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 2476 | NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); |
| 2477 | } |
| 2478 | |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2479 | if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2480 | goto nla_put_failure; |
| 2481 | |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 2482 | rcu_read_lock(); |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 2483 | n = dst_get_neighbour_noref(&rt->dst); |
Eric Dumazet | 94f826b | 2012-03-27 09:53:52 +0000 | [diff] [blame] | 2484 | if (n) { |
| 2485 | if (nla_put(skb, RTA_GATEWAY, 16, &n->primary_key) < 0) { |
| 2486 | rcu_read_unlock(); |
| 2487 | goto nla_put_failure; |
| 2488 | } |
| 2489 | } |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 2490 | rcu_read_unlock(); |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2491 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2492 | if (rt->dst.dev) |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2493 | NLA_PUT_U32(skb, RTA_OIF, rt->dst.dev->ifindex); |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2494 | |
| 2495 | NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric); |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2496 | |
YOSHIFUJI Hideaki | 36e3dea | 2008-05-13 02:52:55 +0900 | [diff] [blame] | 2497 | if (!(rt->rt6i_flags & RTF_EXPIRES)) |
| 2498 | expires = 0; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2499 | else if (rt->dst.expires - jiffies < INT_MAX) |
| 2500 | expires = rt->dst.expires - jiffies; |
YOSHIFUJI Hideaki | 36e3dea | 2008-05-13 02:52:55 +0900 | [diff] [blame] | 2501 | else |
| 2502 | expires = INT_MAX; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 2503 | |
David S. Miller | 346f870 | 2011-12-29 15:22:33 -0500 | [diff] [blame] | 2504 | peer = rt->rt6i_peer; |
| 2505 | ts = tsage = 0; |
| 2506 | if (peer && peer->tcp_ts_stamp) { |
| 2507 | ts = peer->tcp_ts; |
| 2508 | tsage = get_seconds() - peer->tcp_ts_stamp; |
| 2509 | } |
| 2510 | |
| 2511 | if (rtnl_put_cacheinfo(skb, &rt->dst, 0, ts, tsage, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2512 | expires, rt->dst.error) < 0) |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2513 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2515 | return nlmsg_end(skb, nlh); |
| 2516 | |
| 2517 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2518 | nlmsg_cancel(skb, nlh); |
| 2519 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | } |
| 2521 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 2522 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | { |
| 2524 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 2525 | int prefix; |
| 2526 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2527 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 2528 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 2530 | } else |
| 2531 | prefix = 0; |
| 2532 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2533 | return rt6_fill_node(arg->net, |
| 2534 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2536 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | } |
| 2538 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2539 | static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2541 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2542 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2544 | struct sk_buff *skb; |
| 2545 | struct rtmsg *rtm; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2546 | struct flowi6 fl6; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2547 | int err, iif = 0, oif = 0; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2548 | |
| 2549 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2550 | if (err < 0) |
| 2551 | goto errout; |
| 2552 | |
| 2553 | err = -EINVAL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2554 | memset(&fl6, 0, sizeof(fl6)); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2555 | |
| 2556 | if (tb[RTA_SRC]) { |
| 2557 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 2558 | goto errout; |
| 2559 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2560 | fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2561 | } |
| 2562 | |
| 2563 | if (tb[RTA_DST]) { |
| 2564 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 2565 | goto errout; |
| 2566 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2567 | fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2568 | } |
| 2569 | |
| 2570 | if (tb[RTA_IIF]) |
| 2571 | iif = nla_get_u32(tb[RTA_IIF]); |
| 2572 | |
| 2573 | if (tb[RTA_OIF]) |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2574 | oif = nla_get_u32(tb[RTA_OIF]); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2575 | |
| 2576 | if (iif) { |
| 2577 | struct net_device *dev; |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2578 | int flags = 0; |
| 2579 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2580 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2581 | if (!dev) { |
| 2582 | err = -ENODEV; |
| 2583 | goto errout; |
| 2584 | } |
Shmulik Ladkani | 72331bc | 2012-04-01 04:03:45 +0000 | [diff] [blame] | 2585 | |
| 2586 | fl6.flowi6_iif = iif; |
| 2587 | |
| 2588 | if (!ipv6_addr_any(&fl6.saddr)) |
| 2589 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 2590 | |
| 2591 | rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, |
| 2592 | flags); |
| 2593 | } else { |
| 2594 | fl6.flowi6_oif = oif; |
| 2595 | |
| 2596 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2597 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | |
| 2599 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2600 | if (!skb) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2601 | err = -ENOBUFS; |
| 2602 | goto errout; |
| 2603 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | |
| 2605 | /* Reserve room for dummy headers, this skb can pass |
| 2606 | through good chunk of routing engine. |
| 2607 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 2608 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 2610 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2611 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2613 | err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | RTM_NEWROUTE, NETLINK_CB(in_skb).pid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2615 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2617 | kfree_skb(skb); |
| 2618 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | } |
| 2620 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2621 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2622 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | } |
| 2625 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2626 | 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] | 2627 | { |
| 2628 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2629 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2630 | u32 seq; |
| 2631 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2633 | err = -ENOBUFS; |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2634 | seq = info->nlh ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2635 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2636 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
David S. Miller | 3830847 | 2011-12-03 18:02:47 -0500 | [diff] [blame] | 2637 | if (!skb) |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2638 | goto errout; |
| 2639 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2640 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2641 | event, info->pid, seq, 0, 0, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2642 | if (err < 0) { |
| 2643 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 2644 | WARN_ON(err == -EMSGSIZE); |
| 2645 | kfree_skb(skb); |
| 2646 | goto errout; |
| 2647 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 2648 | rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE, |
| 2649 | info->nlh, gfp_any()); |
| 2650 | return; |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2651 | errout: |
| 2652 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2653 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | } |
| 2655 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2656 | static int ip6_route_dev_notify(struct notifier_block *this, |
| 2657 | unsigned long event, void *data) |
| 2658 | { |
| 2659 | struct net_device *dev = (struct net_device *)data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2660 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2661 | |
| 2662 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2663 | net->ipv6.ip6_null_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2664 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 2665 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2666 | net->ipv6.ip6_prohibit_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2667 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2668 | net->ipv6.ip6_blk_hole_entry->dst.dev = dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2669 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 2670 | #endif |
| 2671 | } |
| 2672 | |
| 2673 | return NOTIFY_OK; |
| 2674 | } |
| 2675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | /* |
| 2677 | * /proc |
| 2678 | */ |
| 2679 | |
| 2680 | #ifdef CONFIG_PROC_FS |
| 2681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | struct rt6_proc_arg |
| 2683 | { |
| 2684 | char *buffer; |
| 2685 | int offset; |
| 2686 | int length; |
| 2687 | int skip; |
| 2688 | int len; |
| 2689 | }; |
| 2690 | |
| 2691 | static int rt6_info_route(struct rt6_info *rt, void *p_arg) |
| 2692 | { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2693 | struct seq_file *m = p_arg; |
David S. Miller | 69cce1d | 2011-07-17 23:09:49 -0700 | [diff] [blame] | 2694 | struct neighbour *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2696 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | |
| 2698 | #ifdef CONFIG_IPV6_SUBTREES |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2699 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | #else |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2701 | seq_puts(m, "00000000000000000000000000000000 00 "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | #endif |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 2703 | rcu_read_lock(); |
David Miller | 2721745 | 2011-12-02 16:52:08 +0000 | [diff] [blame] | 2704 | n = dst_get_neighbour_noref(&rt->dst); |
David S. Miller | 69cce1d | 2011-07-17 23:09:49 -0700 | [diff] [blame] | 2705 | if (n) { |
| 2706 | seq_printf(m, "%pi6", n->primary_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | } else { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2708 | seq_puts(m, "00000000000000000000000000000000"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | } |
Eric Dumazet | f2c31e3 | 2011-07-29 19:00:53 +0000 | [diff] [blame] | 2710 | rcu_read_unlock(); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2711 | seq_printf(m, " %08x %08x %08x %08x %8s\n", |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2712 | rt->rt6i_metric, atomic_read(&rt->dst.__refcnt), |
| 2713 | rt->dst.__use, rt->rt6i_flags, |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2714 | rt->dst.dev ? rt->dst.dev->name : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | return 0; |
| 2716 | } |
| 2717 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2718 | static int ipv6_route_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | { |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2720 | struct net *net = (struct net *)m->private; |
Josh Hunt | 32b293a | 2011-12-28 13:23:07 +0000 | [diff] [blame] | 2721 | fib6_clean_all_ro(net, rt6_info_route, 0, m); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2722 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | } |
| 2724 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2725 | static int ipv6_route_open(struct inode *inode, struct file *file) |
| 2726 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2727 | return single_open_net(inode, file, ipv6_route_show); |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2728 | } |
| 2729 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2730 | static const struct file_operations ipv6_route_proc_fops = { |
| 2731 | .owner = THIS_MODULE, |
| 2732 | .open = ipv6_route_open, |
| 2733 | .read = seq_read, |
| 2734 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2735 | .release = single_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2736 | }; |
| 2737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 2739 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2740 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2742 | net->ipv6.rt6_stats->fib_nodes, |
| 2743 | net->ipv6.rt6_stats->fib_route_nodes, |
| 2744 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 2745 | net->ipv6.rt6_stats->fib_rt_entries, |
| 2746 | net->ipv6.rt6_stats->fib_rt_cache, |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2747 | dst_entries_get_slow(&net->ipv6.ip6_dst_ops), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2748 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | |
| 2750 | return 0; |
| 2751 | } |
| 2752 | |
| 2753 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 2754 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2755 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2756 | } |
| 2757 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2758 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | .owner = THIS_MODULE, |
| 2760 | .open = rt6_stats_seq_open, |
| 2761 | .read = seq_read, |
| 2762 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2763 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | }; |
| 2765 | #endif /* CONFIG_PROC_FS */ |
| 2766 | |
| 2767 | #ifdef CONFIG_SYSCTL |
| 2768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | static |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2770 | int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 2772 | { |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2773 | struct net *net; |
| 2774 | int delay; |
| 2775 | if (!write) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | return -EINVAL; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2777 | |
| 2778 | net = (struct net *)ctl->extra1; |
| 2779 | delay = net->ipv6.sysctl.flush_delay; |
| 2780 | proc_dointvec(ctl, write, buffer, lenp, ppos); |
| 2781 | fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); |
| 2782 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2783 | } |
| 2784 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2785 | ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2786 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2788 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 2790 | .mode = 0200, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2791 | .proc_handler = ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | }, |
| 2793 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2795 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | .maxlen = sizeof(int), |
| 2797 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2798 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | }, |
| 2800 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2802 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | .maxlen = sizeof(int), |
| 2804 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2805 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | }, |
| 2807 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2808 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2809 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | .maxlen = sizeof(int), |
| 2811 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2812 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | }, |
| 2814 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2816 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | .maxlen = sizeof(int), |
| 2818 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2819 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | }, |
| 2821 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2823 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | .maxlen = sizeof(int), |
| 2825 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2826 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2827 | }, |
| 2828 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2830 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | .maxlen = sizeof(int), |
| 2832 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 2833 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | }, |
| 2835 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2837 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | .maxlen = sizeof(int), |
| 2839 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2840 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | }, |
| 2842 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2844 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | .maxlen = sizeof(int), |
| 2846 | .mode = 0644, |
Min Zhang | f3d3f61 | 2010-08-14 22:42:51 -0700 | [diff] [blame] | 2847 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | }, |
| 2849 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2851 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | .maxlen = sizeof(int), |
| 2853 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2854 | .proc_handler = proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2856 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | }; |
| 2858 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2859 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2860 | { |
| 2861 | struct ctl_table *table; |
| 2862 | |
| 2863 | table = kmemdup(ipv6_route_table_template, |
| 2864 | sizeof(ipv6_route_table_template), |
| 2865 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2866 | |
| 2867 | if (table) { |
| 2868 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Lucian Adrian Grijincu | c486da3 | 2011-02-24 19:48:03 +0000 | [diff] [blame] | 2869 | table[0].extra1 = net; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2870 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2871 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 2872 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 2873 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 2874 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 2875 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 2876 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 2877 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
Alexey Dobriyan | 9c69fab | 2009-12-18 20:11:03 -0800 | [diff] [blame] | 2878 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2879 | } |
| 2880 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2881 | return table; |
| 2882 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2883 | #endif |
| 2884 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2885 | static int __net_init ip6_route_net_init(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2886 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 2887 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2888 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2889 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
| 2890 | sizeof(net->ipv6.ip6_dst_ops)); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2891 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2892 | if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0) |
| 2893 | goto out_ip6_dst_ops; |
| 2894 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2895 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 2896 | sizeof(*net->ipv6.ip6_null_entry), |
| 2897 | GFP_KERNEL); |
| 2898 | if (!net->ipv6.ip6_null_entry) |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2899 | goto out_ip6_dst_entries; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2900 | net->ipv6.ip6_null_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2901 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2902 | 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] | 2903 | dst_init_metrics(&net->ipv6.ip6_null_entry->dst, |
| 2904 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2905 | |
| 2906 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2907 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 2908 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 2909 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2910 | if (!net->ipv6.ip6_prohibit_entry) |
| 2911 | goto out_ip6_null_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2912 | net->ipv6.ip6_prohibit_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2913 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2914 | 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] | 2915 | dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst, |
| 2916 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2917 | |
| 2918 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 2919 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 2920 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2921 | if (!net->ipv6.ip6_blk_hole_entry) |
| 2922 | goto out_ip6_prohibit_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2923 | net->ipv6.ip6_blk_hole_entry->dst.path = |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2924 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 2925 | 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] | 2926 | dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst, |
| 2927 | ip6_template_metrics, true); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2928 | #endif |
| 2929 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 2930 | net->ipv6.sysctl.flush_delay = 0; |
| 2931 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 2932 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 2933 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 2934 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 2935 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 2936 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 2937 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 2938 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2939 | #ifdef CONFIG_PROC_FS |
| 2940 | proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops); |
| 2941 | proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops); |
| 2942 | #endif |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 2943 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 2944 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2945 | ret = 0; |
| 2946 | out: |
| 2947 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2948 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2949 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2950 | out_ip6_prohibit_entry: |
| 2951 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2952 | out_ip6_null_entry: |
| 2953 | kfree(net->ipv6.ip6_null_entry); |
| 2954 | #endif |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2955 | out_ip6_dst_entries: |
| 2956 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2957 | out_ip6_dst_ops: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2958 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2959 | } |
| 2960 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2961 | static void __net_exit ip6_route_net_exit(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2962 | { |
| 2963 | #ifdef CONFIG_PROC_FS |
| 2964 | proc_net_remove(net, "ipv6_route"); |
| 2965 | proc_net_remove(net, "rt6_stats"); |
| 2966 | #endif |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2967 | kfree(net->ipv6.ip6_null_entry); |
| 2968 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2969 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2970 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 2971 | #endif |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 2972 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2973 | } |
| 2974 | |
| 2975 | static struct pernet_operations ip6_route_net_ops = { |
| 2976 | .init = ip6_route_net_init, |
| 2977 | .exit = ip6_route_net_exit, |
| 2978 | }; |
| 2979 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2980 | static struct notifier_block ip6_route_dev_notifier = { |
| 2981 | .notifier_call = ip6_route_dev_notify, |
| 2982 | .priority = 0, |
| 2983 | }; |
| 2984 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2985 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2987 | int ret; |
| 2988 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2989 | ret = -ENOMEM; |
| 2990 | ip6_dst_ops_template.kmem_cachep = |
| 2991 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 2992 | SLAB_HWCACHE_ALIGN, NULL); |
| 2993 | if (!ip6_dst_ops_template.kmem_cachep) |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 2994 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 2995 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 2996 | ret = dst_entries_init(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2997 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2998 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2999 | |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3000 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 3001 | if (ret) |
| 3002 | goto out_dst_entries; |
| 3003 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 3004 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 3005 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3006 | /* Registering of the loopback is done before this portion of code, |
| 3007 | * the loopback reference in rt6_info will not be taken, do it |
| 3008 | * manually for init_net */ |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3009 | init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3010 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3011 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 3012 | init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3013 | 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] | 3014 | 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] | 3015 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 3016 | #endif |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3017 | ret = fib6_init(); |
| 3018 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3019 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3020 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3021 | ret = xfrm6_init(); |
| 3022 | if (ret) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3023 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 3024 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3025 | ret = fib6_rules_init(); |
| 3026 | if (ret) |
| 3027 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 3028 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3029 | ret = -ENOBUFS; |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 3030 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) || |
| 3031 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) || |
| 3032 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL)) |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3033 | goto fib6_rules_init; |
| 3034 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3035 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 3036 | if (ret) |
| 3037 | goto fib6_rules_init; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3038 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3039 | out: |
| 3040 | return ret; |
| 3041 | |
| 3042 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3043 | fib6_rules_cleanup(); |
| 3044 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3045 | xfrm6_fini(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3046 | out_fib6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3047 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3048 | out_register_subsys: |
| 3049 | unregister_pernet_subsys(&ip6_route_net_ops); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 3050 | out_dst_entries: |
| 3051 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3052 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3053 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 3054 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3055 | } |
| 3056 | |
| 3057 | void ip6_route_cleanup(void) |
| 3058 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3059 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 3060 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3062 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 3063 | unregister_pernet_subsys(&ip6_route_net_ops); |
Xiaotian Feng | 41bb78b | 2010-11-02 16:11:05 +0000 | [diff] [blame] | 3064 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 3065 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | } |