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> |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/times.h> |
| 31 | #include <linux/socket.h> |
| 32 | #include <linux/sockios.h> |
| 33 | #include <linux/net.h> |
| 34 | #include <linux/route.h> |
| 35 | #include <linux/netdevice.h> |
| 36 | #include <linux/in6.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 37 | #include <linux/mroute6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/if_arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/proc_fs.h> |
| 41 | #include <linux/seq_file.h> |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 42 | #include <linux/nsproxy.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 43 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/snmp.h> |
| 45 | #include <net/ipv6.h> |
| 46 | #include <net/ip6_fib.h> |
| 47 | #include <net/ip6_route.h> |
| 48 | #include <net/ndisc.h> |
| 49 | #include <net/addrconf.h> |
| 50 | #include <net/tcp.h> |
| 51 | #include <linux/rtnetlink.h> |
| 52 | #include <net/dst.h> |
| 53 | #include <net/xfrm.h> |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 54 | #include <net/netevent.h> |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 55 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #include <asm/uaccess.h> |
| 58 | |
| 59 | #ifdef CONFIG_SYSCTL |
| 60 | #include <linux/sysctl.h> |
| 61 | #endif |
| 62 | |
| 63 | /* Set to 3 to get tracing. */ |
| 64 | #define RT6_DEBUG 2 |
| 65 | |
| 66 | #if RT6_DEBUG >= 3 |
| 67 | #define RDBG(x) printk x |
| 68 | #define RT6_TRACE(x...) printk(KERN_DEBUG x) |
| 69 | #else |
| 70 | #define RDBG(x) |
| 71 | #define RT6_TRACE(x...) do { ; } while (0) |
| 72 | #endif |
| 73 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 74 | #define CLONE_OFFLINK_ROUTE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | static struct rt6_info * ip6_rt_copy(struct rt6_info *ort); |
| 77 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie); |
| 78 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
| 79 | static void ip6_dst_destroy(struct dst_entry *); |
| 80 | static void ip6_dst_ifdown(struct dst_entry *, |
| 81 | struct net_device *dev, int how); |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 82 | static int ip6_dst_gc(struct dst_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | static int ip6_pkt_discard(struct sk_buff *skb); |
| 85 | static int ip6_pkt_discard_out(struct sk_buff *skb); |
| 86 | static void ip6_link_failure(struct sk_buff *skb); |
| 87 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu); |
| 88 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 89 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 90 | static struct rt6_info *rt6_add_route_info(struct net *net, |
| 91 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 92 | struct in6_addr *gwaddr, int ifindex, |
| 93 | unsigned pref); |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 94 | static struct rt6_info *rt6_get_route_info(struct net *net, |
| 95 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 96 | struct in6_addr *gwaddr, int ifindex); |
| 97 | #endif |
| 98 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 99 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | .family = AF_INET6, |
| 101 | .protocol = __constant_htons(ETH_P_IPV6), |
| 102 | .gc = ip6_dst_gc, |
| 103 | .gc_thresh = 1024, |
| 104 | .check = ip6_dst_check, |
| 105 | .destroy = ip6_dst_destroy, |
| 106 | .ifdown = ip6_dst_ifdown, |
| 107 | .negative_advice = ip6_negative_advice, |
| 108 | .link_failure = ip6_link_failure, |
| 109 | .update_pmtu = ip6_rt_update_pmtu, |
Herbert Xu | 1ac06e0 | 2008-05-20 14:32:14 -0700 | [diff] [blame] | 110 | .local_out = __ip6_local_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | .entry_size = sizeof(struct rt6_info), |
Eric Dumazet | e242297 | 2008-01-30 20:07:45 -0800 | [diff] [blame] | 112 | .entries = ATOMIC_INIT(0), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 115 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 116 | { |
| 117 | } |
| 118 | |
| 119 | static struct dst_ops ip6_dst_blackhole_ops = { |
| 120 | .family = AF_INET6, |
| 121 | .protocol = __constant_htons(ETH_P_IPV6), |
| 122 | .destroy = ip6_dst_destroy, |
| 123 | .check = ip6_dst_check, |
| 124 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
| 125 | .entry_size = sizeof(struct rt6_info), |
Eric Dumazet | e242297 | 2008-01-30 20:07:45 -0800 | [diff] [blame] | 126 | .entries = ATOMIC_INIT(0), |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 127 | }; |
| 128 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 129 | static struct rt6_info ip6_null_entry_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | .u = { |
| 131 | .dst = { |
| 132 | .__refcnt = ATOMIC_INIT(1), |
| 133 | .__use = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | .obsolete = -1, |
| 135 | .error = -ENETUNREACH, |
| 136 | .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, |
| 137 | .input = ip6_pkt_discard, |
| 138 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | }, |
| 141 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
| 142 | .rt6i_metric = ~(u32) 0, |
| 143 | .rt6i_ref = ATOMIC_INIT(1), |
| 144 | }; |
| 145 | |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 146 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 147 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 148 | static int ip6_pkt_prohibit(struct sk_buff *skb); |
| 149 | static int ip6_pkt_prohibit_out(struct sk_buff *skb); |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 150 | |
Adrian Bunk | 280a34c | 2008-04-21 02:29:32 -0700 | [diff] [blame] | 151 | static struct rt6_info ip6_prohibit_entry_template = { |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 152 | .u = { |
| 153 | .dst = { |
| 154 | .__refcnt = ATOMIC_INIT(1), |
| 155 | .__use = 1, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 156 | .obsolete = -1, |
| 157 | .error = -EACCES, |
| 158 | .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 159 | .input = ip6_pkt_prohibit, |
| 160 | .output = ip6_pkt_prohibit_out, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 161 | } |
| 162 | }, |
| 163 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
| 164 | .rt6i_metric = ~(u32) 0, |
| 165 | .rt6i_ref = ATOMIC_INIT(1), |
| 166 | }; |
| 167 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 168 | static struct rt6_info ip6_blk_hole_entry_template = { |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 169 | .u = { |
| 170 | .dst = { |
| 171 | .__refcnt = ATOMIC_INIT(1), |
| 172 | .__use = 1, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 173 | .obsolete = -1, |
| 174 | .error = -EINVAL, |
| 175 | .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 176 | .input = dst_discard, |
| 177 | .output = dst_discard, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 178 | } |
| 179 | }, |
| 180 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
| 181 | .rt6i_metric = ~(u32) 0, |
| 182 | .rt6i_ref = ATOMIC_INIT(1), |
| 183 | }; |
| 184 | |
| 185 | #endif |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /* allocate dst with ip6_dst_ops */ |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 188 | static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 190 | return (struct rt6_info *)dst_alloc(ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static void ip6_dst_destroy(struct dst_entry *dst) |
| 194 | { |
| 195 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 196 | struct inet6_dev *idev = rt->rt6i_idev; |
| 197 | |
| 198 | if (idev != NULL) { |
| 199 | rt->rt6i_idev = NULL; |
| 200 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 205 | int how) |
| 206 | { |
| 207 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 208 | struct inet6_dev *idev = rt->rt6i_idev; |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 209 | struct net_device *loopback_dev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 210 | dev_net(dev)->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 212 | if (dev != loopback_dev && idev != NULL && idev->dev == dev) { |
| 213 | struct inet6_dev *loopback_idev = |
| 214 | in6_dev_get(loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (loopback_idev != NULL) { |
| 216 | rt->rt6i_idev = loopback_idev; |
| 217 | in6_dev_put(idev); |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | static __inline__ int rt6_check_expired(const struct rt6_info *rt) |
| 223 | { |
| 224 | return (rt->rt6i_flags & RTF_EXPIRES && |
| 225 | time_after(jiffies, rt->rt6i_expires)); |
| 226 | } |
| 227 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 228 | static inline int rt6_need_strict(struct in6_addr *daddr) |
| 229 | { |
| 230 | return (ipv6_addr_type(daddr) & |
YOSHIFUJI Hideaki | 5ce83af | 2008-06-25 16:58:17 +0900 | [diff] [blame^] | 231 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 235 | * Route lookup. Any table->tb6_lock is implied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | */ |
| 237 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 238 | static inline struct rt6_info *rt6_device_match(struct net *net, |
| 239 | struct rt6_info *rt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 241 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | { |
| 243 | struct rt6_info *local = NULL; |
| 244 | struct rt6_info *sprt; |
| 245 | |
| 246 | if (oif) { |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 247 | for (sprt = rt; sprt; sprt = sprt->u.dst.rt6_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | struct net_device *dev = sprt->rt6i_dev; |
| 249 | if (dev->ifindex == oif) |
| 250 | return sprt; |
| 251 | if (dev->flags & IFF_LOOPBACK) { |
| 252 | if (sprt->rt6i_idev == NULL || |
| 253 | sprt->rt6i_idev->dev->ifindex != oif) { |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 254 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | continue; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 256 | if (local && (!oif || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | local->rt6i_idev->dev->ifindex == oif)) |
| 258 | continue; |
| 259 | } |
| 260 | local = sprt; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | if (local) |
| 265 | return local; |
| 266 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 267 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 268 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
| 270 | return rt; |
| 271 | } |
| 272 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 273 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 274 | static void rt6_probe(struct rt6_info *rt) |
| 275 | { |
| 276 | struct neighbour *neigh = rt ? rt->rt6i_nexthop : NULL; |
| 277 | /* |
| 278 | * Okay, this does not seem to be appropriate |
| 279 | * for now, however, we need to check if it |
| 280 | * is really so; aka Router Reachability Probing. |
| 281 | * |
| 282 | * Router Reachability Probe MUST be rate-limited |
| 283 | * to no more than one per minute. |
| 284 | */ |
| 285 | if (!neigh || (neigh->nud_state & NUD_VALID)) |
| 286 | return; |
| 287 | read_lock_bh(&neigh->lock); |
| 288 | if (!(neigh->nud_state & NUD_VALID) && |
YOSHIFUJI Hideaki | 52e16356 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 289 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 290 | struct in6_addr mcaddr; |
| 291 | struct in6_addr *target; |
| 292 | |
| 293 | neigh->updated = jiffies; |
| 294 | read_unlock_bh(&neigh->lock); |
| 295 | |
| 296 | target = (struct in6_addr *)&neigh->primary_key; |
| 297 | addrconf_addr_solict_mult(target, &mcaddr); |
| 298 | ndisc_send_ns(rt->rt6i_dev, NULL, target, &mcaddr, NULL); |
| 299 | } else |
| 300 | read_unlock_bh(&neigh->lock); |
| 301 | } |
| 302 | #else |
| 303 | static inline void rt6_probe(struct rt6_info *rt) |
| 304 | { |
| 305 | return; |
| 306 | } |
| 307 | #endif |
| 308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 310 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 312 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 314 | struct net_device *dev = rt->rt6i_dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 315 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 316 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 317 | if ((dev->flags & IFF_LOOPBACK) && |
| 318 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 319 | return 1; |
| 320 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 323 | static inline int rt6_check_neigh(struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 325 | struct neighbour *neigh = rt->rt6i_nexthop; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 326 | int m; |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 327 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 328 | !(rt->rt6i_flags & RTF_GATEWAY)) |
| 329 | m = 1; |
| 330 | else if (neigh) { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 331 | read_lock_bh(&neigh->lock); |
| 332 | if (neigh->nud_state & NUD_VALID) |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 333 | m = 2; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 334 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 335 | else if (neigh->nud_state & NUD_FAILED) |
| 336 | m = 0; |
| 337 | #endif |
| 338 | else |
YOSHIFUJI Hideaki | ea73ee2 | 2006-11-06 09:45:44 -0800 | [diff] [blame] | 339 | m = 1; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 340 | read_unlock_bh(&neigh->lock); |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 341 | } else |
| 342 | m = 0; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 343 | return m; |
| 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 346 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 347 | int strict) |
| 348 | { |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 349 | int m, n; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 350 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 351 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 352 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 353 | return -1; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 354 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 355 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 356 | #endif |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 357 | n = rt6_check_neigh(rt); |
YOSHIFUJI Hideaki | 557e92e | 2006-11-06 09:45:45 -0800 | [diff] [blame] | 358 | if (!n && (strict & RT6_LOOKUP_F_REACHABLE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 359 | return -1; |
| 360 | return m; |
| 361 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 363 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
| 364 | int *mpri, struct rt6_info *match) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 365 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 366 | int m; |
| 367 | |
| 368 | if (rt6_check_expired(rt)) |
| 369 | goto out; |
| 370 | |
| 371 | m = rt6_score_route(rt, oif, strict); |
| 372 | if (m < 0) |
| 373 | goto out; |
| 374 | |
| 375 | if (m > *mpri) { |
| 376 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 377 | rt6_probe(match); |
| 378 | *mpri = m; |
| 379 | match = rt; |
| 380 | } else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 381 | rt6_probe(rt); |
| 382 | } |
| 383 | |
| 384 | out: |
| 385 | return match; |
| 386 | } |
| 387 | |
| 388 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 389 | struct rt6_info *rr_head, |
| 390 | u32 metric, int oif, int strict) |
| 391 | { |
| 392 | struct rt6_info *rt, *match; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 393 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 395 | match = NULL; |
| 396 | for (rt = rr_head; rt && rt->rt6i_metric == metric; |
| 397 | rt = rt->u.dst.rt6_next) |
| 398 | match = find_match(rt, oif, strict, &mpri, match); |
| 399 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; |
| 400 | rt = rt->u.dst.rt6_next) |
| 401 | match = find_match(rt, oif, strict, &mpri, match); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 402 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 403 | return match; |
| 404 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 405 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 406 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 407 | { |
| 408 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 409 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 411 | RT6_TRACE("%s(fn->leaf=%p, oif=%d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 412 | __func__, fn->leaf, oif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 414 | rt0 = fn->rr_ptr; |
| 415 | if (!rt0) |
| 416 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 418 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 420 | if (!match && |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 421 | (strict & RT6_LOOKUP_F_REACHABLE)) { |
| 422 | struct rt6_info *next = rt0->u.dst.rt6_next; |
| 423 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 424 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 425 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 426 | next = fn->leaf; |
| 427 | |
| 428 | if (next != rt0) |
| 429 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 432 | RT6_TRACE("%s() => %p\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 433 | __func__, match); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 435 | net = dev_net(rt0->rt6i_dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 436 | return (match ? match : net->ipv6.ip6_null_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 439 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 440 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
| 441 | struct in6_addr *gwaddr) |
| 442 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 443 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 444 | struct route_info *rinfo = (struct route_info *) opt; |
| 445 | struct in6_addr prefix_buf, *prefix; |
| 446 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 447 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 448 | struct rt6_info *rt; |
| 449 | |
| 450 | if (len < sizeof(struct route_info)) { |
| 451 | return -EINVAL; |
| 452 | } |
| 453 | |
| 454 | /* Sanity check for prefix_len and length */ |
| 455 | if (rinfo->length > 3) { |
| 456 | return -EINVAL; |
| 457 | } else if (rinfo->prefix_len > 128) { |
| 458 | return -EINVAL; |
| 459 | } else if (rinfo->prefix_len > 64) { |
| 460 | if (rinfo->length < 2) { |
| 461 | return -EINVAL; |
| 462 | } |
| 463 | } else if (rinfo->prefix_len > 0) { |
| 464 | if (rinfo->length < 1) { |
| 465 | return -EINVAL; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | pref = rinfo->route_pref; |
| 470 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
| 471 | pref = ICMPV6_ROUTER_PREF_MEDIUM; |
| 472 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 473 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 474 | |
| 475 | if (rinfo->length == 3) |
| 476 | prefix = (struct in6_addr *)rinfo->prefix; |
| 477 | else { |
| 478 | /* this function is safe */ |
| 479 | ipv6_addr_prefix(&prefix_buf, |
| 480 | (struct in6_addr *)rinfo->prefix, |
| 481 | rinfo->prefix_len); |
| 482 | prefix = &prefix_buf; |
| 483 | } |
| 484 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 485 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr, |
| 486 | dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 487 | |
| 488 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 489 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 490 | rt = NULL; |
| 491 | } |
| 492 | |
| 493 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 494 | 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] | 495 | pref); |
| 496 | else if (rt) |
| 497 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 498 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 499 | |
| 500 | if (rt) { |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 501 | if (!addrconf_finite_timeout(lifetime)) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 502 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 503 | } else { |
| 504 | rt->rt6i_expires = jiffies + HZ * lifetime; |
| 505 | rt->rt6i_flags |= RTF_EXPIRES; |
| 506 | } |
| 507 | dst_release(&rt->u.dst); |
| 508 | } |
| 509 | return 0; |
| 510 | } |
| 511 | #endif |
| 512 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 513 | #define BACKTRACK(__net, saddr) \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 514 | do { \ |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 515 | if (rt == __net->ipv6.ip6_null_entry) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 516 | struct fib6_node *pn; \ |
Ville Nuorvala | e0eda7b | 2006-10-16 22:11:11 -0700 | [diff] [blame] | 517 | while (1) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 518 | if (fn->fn_flags & RTN_TL_ROOT) \ |
| 519 | goto out; \ |
| 520 | pn = fn->parent; \ |
| 521 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ |
Kim Nordlund | 8bce65b | 2006-12-13 16:38:29 -0800 | [diff] [blame] | 522 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 523 | else \ |
| 524 | fn = pn; \ |
| 525 | if (fn->fn_flags & RTN_RTINFO) \ |
| 526 | goto restart; \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 527 | } \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 528 | } \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 529 | } while(0) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 530 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 531 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 532 | struct fib6_table *table, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 533 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | { |
| 535 | struct fib6_node *fn; |
| 536 | struct rt6_info *rt; |
| 537 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 538 | read_lock_bh(&table->tb6_lock); |
| 539 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
| 540 | restart: |
| 541 | rt = fn->leaf; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 542 | rt = rt6_device_match(net, rt, fl->oif, flags); |
| 543 | BACKTRACK(net, &fl->fl6_src); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 544 | out: |
Pavel Emelyanov | 03f49f3 | 2007-11-10 21:28:34 -0800 | [diff] [blame] | 545 | dst_use(&rt->u.dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 546 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 547 | return rt; |
| 548 | |
| 549 | } |
| 550 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 551 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 552 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 553 | { |
| 554 | struct flowi fl = { |
| 555 | .oif = oif, |
| 556 | .nl_u = { |
| 557 | .ip6_u = { |
| 558 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 559 | }, |
| 560 | }, |
| 561 | }; |
| 562 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 563 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 564 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 565 | if (saddr) { |
| 566 | memcpy(&fl.fl6_src, saddr, sizeof(*saddr)); |
| 567 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 568 | } |
| 569 | |
Daniel Lezcano | 606a2b4 | 2008-03-04 13:45:59 -0800 | [diff] [blame] | 570 | dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 571 | if (dst->error == 0) |
| 572 | return (struct rt6_info *) dst; |
| 573 | |
| 574 | dst_release(dst); |
| 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | return NULL; |
| 577 | } |
| 578 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 579 | EXPORT_SYMBOL(rt6_lookup); |
| 580 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 581 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | It takes new route entry, the addition fails by any reason the |
| 583 | route is freed. In any case, if caller does not hold it, it may |
| 584 | be destroyed. |
| 585 | */ |
| 586 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 587 | 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] | 588 | { |
| 589 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 590 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 592 | table = rt->rt6i_table; |
| 593 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 594 | err = fib6_add(&table->tb6_root, rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 595 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
| 597 | return err; |
| 598 | } |
| 599 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 600 | int ip6_ins_rt(struct rt6_info *rt) |
| 601 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 602 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 603 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 604 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 605 | return __ip6_ins_rt(rt, &info); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 606 | } |
| 607 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 608 | static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr, |
| 609 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | struct rt6_info *rt; |
| 612 | |
| 613 | /* |
| 614 | * Clone the route. |
| 615 | */ |
| 616 | |
| 617 | rt = ip6_rt_copy(ort); |
| 618 | |
| 619 | if (rt) { |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 620 | if (!(rt->rt6i_flags&RTF_GATEWAY)) { |
| 621 | if (rt->rt6i_dst.plen != 128 && |
| 622 | ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)) |
| 623 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | ipv6_addr_copy(&rt->rt6i_gateway, daddr); |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 627 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | rt->rt6i_dst.plen = 128; |
| 629 | rt->rt6i_flags |= RTF_CACHE; |
| 630 | rt->u.dst.flags |= DST_HOST; |
| 631 | |
| 632 | #ifdef CONFIG_IPV6_SUBTREES |
| 633 | if (rt->rt6i_src.plen && saddr) { |
| 634 | ipv6_addr_copy(&rt->rt6i_src.addr, saddr); |
| 635 | rt->rt6i_src.plen = 128; |
| 636 | } |
| 637 | #endif |
| 638 | |
| 639 | rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 640 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 641 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 643 | return rt; |
| 644 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 646 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr) |
| 647 | { |
| 648 | struct rt6_info *rt = ip6_rt_copy(ort); |
| 649 | if (rt) { |
| 650 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
| 651 | rt->rt6i_dst.plen = 128; |
| 652 | rt->rt6i_flags |= RTF_CACHE; |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 653 | rt->u.dst.flags |= DST_HOST; |
| 654 | rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop); |
| 655 | } |
| 656 | return rt; |
| 657 | } |
| 658 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 659 | static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif, |
| 660 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
| 662 | struct fib6_node *fn; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 663 | struct rt6_info *rt, *nrt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 664 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | int attempts = 3; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 666 | int err; |
YOSHIFUJI Hideaki | ea659e0 | 2006-11-06 09:45:45 -0800 | [diff] [blame] | 667 | int reachable = ipv6_devconf.forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 669 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | relookup: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 672 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 674 | restart_2: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 675 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
| 677 | restart: |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 678 | rt = rt6_select(fn, oif, strict | reachable); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 679 | |
| 680 | BACKTRACK(net, &fl->fl6_src); |
| 681 | if (rt == net->ipv6.ip6_null_entry || |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 682 | rt->rt6i_flags & RTF_CACHE) |
YOSHIFUJI Hideaki | 1ddef044 | 2006-03-20 17:01:24 -0800 | [diff] [blame] | 683 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 685 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 686 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 687 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 688 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 689 | nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 690 | else { |
| 691 | #if CLONE_OFFLINK_ROUTE |
| 692 | nrt = rt6_alloc_clone(rt, &fl->fl6_dst); |
| 693 | #else |
| 694 | goto out2; |
| 695 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 697 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 698 | dst_release(&rt->u.dst); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 699 | rt = nrt ? : net->ipv6.ip6_null_entry; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 700 | |
| 701 | dst_hold(&rt->u.dst); |
| 702 | if (nrt) { |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 703 | err = ip6_ins_rt(nrt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 704 | if (!err) |
| 705 | goto out2; |
| 706 | } |
| 707 | |
| 708 | if (--attempts <= 0) |
| 709 | goto out2; |
| 710 | |
| 711 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 712 | * Race condition! In the gap, when table->tb6_lock was |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 713 | * released someone could insert this route. Relookup. |
| 714 | */ |
| 715 | dst_release(&rt->u.dst); |
| 716 | goto relookup; |
| 717 | |
| 718 | out: |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 719 | if (reachable) { |
| 720 | reachable = 0; |
| 721 | goto restart_2; |
| 722 | } |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 723 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 724 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | out2: |
| 726 | rt->u.dst.lastuse = jiffies; |
| 727 | rt->u.dst.__use++; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 728 | |
| 729 | return rt; |
| 730 | } |
| 731 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 732 | static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *table, |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 733 | struct flowi *fl, int flags) |
| 734 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 735 | return ip6_pol_route(net, table, fl->iif, fl, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 738 | void ip6_route_input(struct sk_buff *skb) |
| 739 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 740 | struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 741 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 742 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 743 | struct flowi fl = { |
| 744 | .iif = skb->dev->ifindex, |
| 745 | .nl_u = { |
| 746 | .ip6_u = { |
| 747 | .daddr = iph->daddr, |
| 748 | .saddr = iph->saddr, |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 749 | .flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 750 | }, |
| 751 | }, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 752 | .mark = skb->mark, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 753 | .proto = iph->nexthdr, |
| 754 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 755 | |
| 756 | if (rt6_need_strict(&iph->daddr)) |
| 757 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 758 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 759 | skb->dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 760 | } |
| 761 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 762 | static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 763 | struct flowi *fl, int flags) |
| 764 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 765 | return ip6_pol_route(net, table, fl->oif, fl, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 766 | } |
| 767 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 768 | struct dst_entry * ip6_route_output(struct net *net, struct sock *sk, |
| 769 | struct flowi *fl) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 770 | { |
| 771 | int flags = 0; |
| 772 | |
| 773 | if (rt6_need_strict(&fl->fl6_dst)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 774 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 775 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 776 | if (!ipv6_addr_any(&fl->fl6_src)) |
| 777 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 778 | else if (sk) { |
| 779 | unsigned int prefs = inet6_sk(sk)->srcprefs; |
| 780 | if (prefs & IPV6_PREFER_SRC_TMP) |
| 781 | flags |= RT6_LOOKUP_F_SRCPREF_TMP; |
| 782 | if (prefs & IPV6_PREFER_SRC_PUBLIC) |
| 783 | flags |= RT6_LOOKUP_F_SRCPREF_PUBLIC; |
| 784 | if (prefs & IPV6_PREFER_SRC_COA) |
| 785 | flags |= RT6_LOOKUP_F_SRCPREF_COA; |
| 786 | } |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 787 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 788 | return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 791 | EXPORT_SYMBOL(ip6_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 793 | int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl) |
| 794 | { |
| 795 | struct rt6_info *ort = (struct rt6_info *) *dstp; |
| 796 | struct rt6_info *rt = (struct rt6_info *) |
| 797 | dst_alloc(&ip6_dst_blackhole_ops); |
| 798 | struct dst_entry *new = NULL; |
| 799 | |
| 800 | if (rt) { |
| 801 | new = &rt->u.dst; |
| 802 | |
| 803 | atomic_set(&new->__refcnt, 1); |
| 804 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 805 | new->input = dst_discard; |
| 806 | new->output = dst_discard; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 807 | |
| 808 | memcpy(new->metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32)); |
| 809 | new->dev = ort->u.dst.dev; |
| 810 | if (new->dev) |
| 811 | dev_hold(new->dev); |
| 812 | rt->rt6i_idev = ort->rt6i_idev; |
| 813 | if (rt->rt6i_idev) |
| 814 | in6_dev_hold(rt->rt6i_idev); |
| 815 | rt->rt6i_expires = 0; |
| 816 | |
| 817 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 818 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 819 | rt->rt6i_metric = 0; |
| 820 | |
| 821 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 822 | #ifdef CONFIG_IPV6_SUBTREES |
| 823 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 824 | #endif |
| 825 | |
| 826 | dst_free(new); |
| 827 | } |
| 828 | |
| 829 | dst_release(*dstp); |
| 830 | *dstp = new; |
| 831 | return (new ? 0 : -ENOMEM); |
| 832 | } |
| 833 | EXPORT_SYMBOL_GPL(ip6_dst_blackhole); |
| 834 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | /* |
| 836 | * Destination cache support functions |
| 837 | */ |
| 838 | |
| 839 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 840 | { |
| 841 | struct rt6_info *rt; |
| 842 | |
| 843 | rt = (struct rt6_info *) dst; |
| 844 | |
| 845 | if (rt && rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie)) |
| 846 | return dst; |
| 847 | |
| 848 | return NULL; |
| 849 | } |
| 850 | |
| 851 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 852 | { |
| 853 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 854 | |
| 855 | if (rt) { |
| 856 | if (rt->rt6i_flags & RTF_CACHE) |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 857 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | else |
| 859 | dst_release(dst); |
| 860 | } |
| 861 | return NULL; |
| 862 | } |
| 863 | |
| 864 | static void ip6_link_failure(struct sk_buff *skb) |
| 865 | { |
| 866 | struct rt6_info *rt; |
| 867 | |
| 868 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev); |
| 869 | |
| 870 | rt = (struct rt6_info *) skb->dst; |
| 871 | if (rt) { |
| 872 | if (rt->rt6i_flags&RTF_CACHE) { |
| 873 | dst_set_expires(&rt->u.dst, 0); |
| 874 | rt->rt6i_flags |= RTF_EXPIRES; |
| 875 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) |
| 876 | rt->rt6i_node->fn_sernum = -1; |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 881 | { |
| 882 | struct rt6_info *rt6 = (struct rt6_info*)dst; |
| 883 | |
| 884 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
| 885 | rt6->rt6i_flags |= RTF_MODIFIED; |
| 886 | if (mtu < IPV6_MIN_MTU) { |
| 887 | mtu = IPV6_MIN_MTU; |
| 888 | dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 889 | } |
| 890 | dst->metrics[RTAX_MTU-1] = mtu; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 891 | call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | } |
| 893 | } |
| 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | static int ipv6_get_mtu(struct net_device *dev); |
| 896 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 897 | static inline unsigned int ipv6_advmss(struct net *net, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | { |
| 899 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 900 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 901 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 902 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 905 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 906 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 907 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | * rely only on pmtu discovery" |
| 909 | */ |
| 910 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 911 | mtu = IPV6_MAXPLEN; |
| 912 | return mtu; |
| 913 | } |
| 914 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 915 | static struct dst_entry *icmp6_dst_gc_list; |
| 916 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 917 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 918 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | struct neighbour *neigh, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 920 | const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | { |
| 922 | struct rt6_info *rt; |
| 923 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 924 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | if (unlikely(idev == NULL)) |
| 927 | return NULL; |
| 928 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 929 | rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | if (unlikely(rt == NULL)) { |
| 931 | in6_dev_put(idev); |
| 932 | goto out; |
| 933 | } |
| 934 | |
| 935 | dev_hold(dev); |
| 936 | if (neigh) |
| 937 | neigh_hold(neigh); |
| 938 | else |
| 939 | neigh = ndisc_get_neigh(dev, addr); |
| 940 | |
| 941 | rt->rt6i_dev = dev; |
| 942 | rt->rt6i_idev = idev; |
| 943 | rt->rt6i_nexthop = neigh; |
| 944 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 945 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255; |
| 946 | rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev); |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 947 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst)); |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 948 | rt->u.dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
| 950 | #if 0 /* there's no chance to use these for ndisc */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 951 | rt->u.dst.flags = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST |
| 952 | ? DST_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | : 0; |
| 954 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 955 | rt->rt6i_dst.plen = 128; |
| 956 | #endif |
| 957 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 958 | spin_lock_bh(&icmp6_dst_lock); |
| 959 | rt->u.dst.next = icmp6_dst_gc_list; |
| 960 | icmp6_dst_gc_list = &rt->u.dst; |
| 961 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 963 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
| 965 | out: |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 966 | return &rt->u.dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 969 | int icmp6_dst_gc(int *more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | { |
| 971 | struct dst_entry *dst, *next, **pprev; |
| 972 | int freed; |
| 973 | |
| 974 | next = NULL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 975 | freed = 0; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 976 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 977 | spin_lock_bh(&icmp6_dst_lock); |
| 978 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | while ((dst = *pprev) != NULL) { |
| 981 | if (!atomic_read(&dst->__refcnt)) { |
| 982 | *pprev = dst->next; |
| 983 | dst_free(dst); |
| 984 | freed++; |
| 985 | } else { |
| 986 | pprev = &dst->next; |
| 987 | (*more)++; |
| 988 | } |
| 989 | } |
| 990 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 991 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 992 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | return freed; |
| 994 | } |
| 995 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 996 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | unsigned long now = jiffies; |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 999 | struct net *net = ops->dst_net; |
| 1000 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1001 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1002 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1003 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1004 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1006 | if (time_after(rt_last_gc + rt_min_interval, now) && |
| 1007 | atomic_read(&ops->entries) <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | goto out; |
| 1009 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1010 | net->ipv6.ip6_rt_gc_expire++; |
| 1011 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net); |
| 1012 | net->ipv6.ip6_rt_last_gc = now; |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1013 | if (atomic_read(&ops->entries) < ops->gc_thresh) |
| 1014 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1016 | net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity; |
| 1017 | return (atomic_read(&ops->entries) > rt_max_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | /* Clean host part of a prefix. Not necessary in radix tree, |
| 1021 | but results in cleaner routing tables. |
| 1022 | |
| 1023 | Remove it only when all the things will work! |
| 1024 | */ |
| 1025 | |
| 1026 | static int ipv6_get_mtu(struct net_device *dev) |
| 1027 | { |
| 1028 | int mtu = IPV6_MIN_MTU; |
| 1029 | struct inet6_dev *idev; |
| 1030 | |
| 1031 | idev = in6_dev_get(dev); |
| 1032 | if (idev) { |
| 1033 | mtu = idev->cnf.mtu6; |
| 1034 | in6_dev_put(idev); |
| 1035 | } |
| 1036 | return mtu; |
| 1037 | } |
| 1038 | |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1039 | int ip6_dst_hoplimit(struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | { |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1041 | int hoplimit = dst_metric(dst, RTAX_HOPLIMIT); |
| 1042 | if (hoplimit < 0) { |
| 1043 | struct net_device *dev = dst->dev; |
| 1044 | struct inet6_dev *idev = in6_dev_get(dev); |
| 1045 | if (idev) { |
| 1046 | hoplimit = idev->cnf.hop_limit; |
| 1047 | in6_dev_put(idev); |
| 1048 | } else |
| 1049 | hoplimit = ipv6_devconf.hop_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | return hoplimit; |
| 1052 | } |
| 1053 | |
| 1054 | /* |
| 1055 | * |
| 1056 | */ |
| 1057 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1058 | int ip6_route_add(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | { |
| 1060 | int err; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1061 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | struct rt6_info *rt = NULL; |
| 1063 | struct net_device *dev = NULL; |
| 1064 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1065 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | int addr_type; |
| 1067 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1068 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | return -EINVAL; |
| 1070 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1071 | if (cfg->fc_src_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | return -EINVAL; |
| 1073 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1074 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1076 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | if (!dev) |
| 1078 | goto out; |
| 1079 | idev = in6_dev_get(dev); |
| 1080 | if (!idev) |
| 1081 | goto out; |
| 1082 | } |
| 1083 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1084 | if (cfg->fc_metric == 0) |
| 1085 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1087 | table = fib6_new_table(net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1088 | if (table == NULL) { |
| 1089 | err = -ENOBUFS; |
| 1090 | goto out; |
| 1091 | } |
| 1092 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1093 | rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | if (rt == NULL) { |
| 1096 | err = -ENOMEM; |
| 1097 | goto out; |
| 1098 | } |
| 1099 | |
| 1100 | rt->u.dst.obsolete = -1; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1101 | rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ? |
| 1102 | jiffies + clock_t_to_jiffies(cfg->fc_expires) : |
| 1103 | 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1105 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1106 | cfg->fc_protocol = RTPROT_BOOT; |
| 1107 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1108 | |
| 1109 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | |
| 1111 | if (addr_type & IPV6_ADDR_MULTICAST) |
| 1112 | rt->u.dst.input = ip6_mc_input; |
| 1113 | else |
| 1114 | rt->u.dst.input = ip6_forward; |
| 1115 | |
| 1116 | rt->u.dst.output = ip6_output; |
| 1117 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1118 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1119 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | if (rt->rt6i_dst.plen == 128) |
| 1121 | rt->u.dst.flags = DST_HOST; |
| 1122 | |
| 1123 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1124 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1125 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | #endif |
| 1127 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1128 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
| 1130 | /* We cannot add true routes via loopback here, |
| 1131 | they would result in kernel looping; promote them to reject routes |
| 1132 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1133 | if ((cfg->fc_flags & RTF_REJECT) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) { |
| 1135 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1136 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | if (dev) { |
| 1138 | dev_put(dev); |
| 1139 | in6_dev_put(idev); |
| 1140 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1141 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | dev_hold(dev); |
| 1143 | idev = in6_dev_get(dev); |
| 1144 | if (!idev) { |
| 1145 | err = -ENODEV; |
| 1146 | goto out; |
| 1147 | } |
| 1148 | } |
| 1149 | rt->u.dst.output = ip6_pkt_discard_out; |
| 1150 | rt->u.dst.input = ip6_pkt_discard; |
| 1151 | rt->u.dst.error = -ENETUNREACH; |
| 1152 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
| 1153 | goto install_route; |
| 1154 | } |
| 1155 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1156 | if (cfg->fc_flags & RTF_GATEWAY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | struct in6_addr *gw_addr; |
| 1158 | int gwa_type; |
| 1159 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1160 | gw_addr = &cfg->fc_gateway; |
| 1161 | ipv6_addr_copy(&rt->rt6i_gateway, gw_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | gwa_type = ipv6_addr_type(gw_addr); |
| 1163 | |
| 1164 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1165 | struct rt6_info *grt; |
| 1166 | |
| 1167 | /* IPv6 strictly inhibits using not link-local |
| 1168 | addresses as nexthop address. |
| 1169 | Otherwise, router will not able to send redirects. |
| 1170 | It is very good, but in some (rare!) circumstances |
| 1171 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1172 | some exceptions. --ANK |
| 1173 | */ |
| 1174 | err = -EINVAL; |
| 1175 | if (!(gwa_type&IPV6_ADDR_UNICAST)) |
| 1176 | goto out; |
| 1177 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1178 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | err = -EHOSTUNREACH; |
| 1181 | if (grt == NULL) |
| 1182 | goto out; |
| 1183 | if (dev) { |
| 1184 | if (dev != grt->rt6i_dev) { |
| 1185 | dst_release(&grt->u.dst); |
| 1186 | goto out; |
| 1187 | } |
| 1188 | } else { |
| 1189 | dev = grt->rt6i_dev; |
| 1190 | idev = grt->rt6i_idev; |
| 1191 | dev_hold(dev); |
| 1192 | in6_dev_hold(grt->rt6i_idev); |
| 1193 | } |
| 1194 | if (!(grt->rt6i_flags&RTF_GATEWAY)) |
| 1195 | err = 0; |
| 1196 | dst_release(&grt->u.dst); |
| 1197 | |
| 1198 | if (err) |
| 1199 | goto out; |
| 1200 | } |
| 1201 | err = -EINVAL; |
| 1202 | if (dev == NULL || (dev->flags&IFF_LOOPBACK)) |
| 1203 | goto out; |
| 1204 | } |
| 1205 | |
| 1206 | err = -ENODEV; |
| 1207 | if (dev == NULL) |
| 1208 | goto out; |
| 1209 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1210 | if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev); |
| 1212 | if (IS_ERR(rt->rt6i_nexthop)) { |
| 1213 | err = PTR_ERR(rt->rt6i_nexthop); |
| 1214 | rt->rt6i_nexthop = NULL; |
| 1215 | goto out; |
| 1216 | } |
| 1217 | } |
| 1218 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1219 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
| 1221 | install_route: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1222 | if (cfg->fc_mx) { |
| 1223 | struct nlattr *nla; |
| 1224 | int remaining; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1226 | 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] | 1227 | int type = nla_type(nla); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1228 | |
| 1229 | if (type) { |
| 1230 | if (type > RTAX_MAX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | err = -EINVAL; |
| 1232 | goto out; |
| 1233 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1234 | |
| 1235 | rt->u.dst.metrics[type - 1] = nla_get_u32(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | } |
| 1239 | |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1240 | if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1242 | if (!dst_metric(&rt->u.dst, RTAX_MTU)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev); |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1244 | if (!dst_metric(&rt->u.dst, RTAX_ADVMSS)) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1245 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | rt->u.dst.dev = dev; |
| 1247 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1248 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1249 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1250 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1251 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1252 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | |
| 1254 | out: |
| 1255 | if (dev) |
| 1256 | dev_put(dev); |
| 1257 | if (idev) |
| 1258 | in6_dev_put(idev); |
| 1259 | if (rt) |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1260 | dst_free(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | return err; |
| 1262 | } |
| 1263 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1264 | 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] | 1265 | { |
| 1266 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1267 | struct fib6_table *table; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1268 | struct net *net = dev_net(rt->rt6i_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1270 | if (rt == net->ipv6.ip6_null_entry) |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 1271 | return -ENOENT; |
| 1272 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1273 | table = rt->rt6i_table; |
| 1274 | write_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1276 | err = fib6_del(rt, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | dst_release(&rt->u.dst); |
| 1278 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1279 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
| 1281 | return err; |
| 1282 | } |
| 1283 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1284 | int ip6_del_rt(struct rt6_info *rt) |
| 1285 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1286 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1287 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1288 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 1289 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1292 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1294 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | struct fib6_node *fn; |
| 1296 | struct rt6_info *rt; |
| 1297 | int err = -ESRCH; |
| 1298 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1299 | table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1300 | if (table == NULL) |
| 1301 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1303 | read_lock_bh(&table->tb6_lock); |
| 1304 | |
| 1305 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1306 | &cfg->fc_dst, cfg->fc_dst_len, |
| 1307 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | if (fn) { |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1310 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1311 | if (cfg->fc_ifindex && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | (rt->rt6i_dev == NULL || |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1313 | rt->rt6i_dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1315 | if (cfg->fc_flags & RTF_GATEWAY && |
| 1316 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1318 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | continue; |
| 1320 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1321 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1323 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | } |
| 1325 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1326 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | return err; |
| 1329 | } |
| 1330 | |
| 1331 | /* |
| 1332 | * Handle redirects |
| 1333 | */ |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1334 | struct ip6rd_flowi { |
| 1335 | struct flowi fl; |
| 1336 | struct in6_addr gateway; |
| 1337 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1339 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1340 | struct fib6_table *table, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1341 | struct flowi *fl, |
| 1342 | int flags) |
| 1343 | { |
| 1344 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl; |
| 1345 | struct rt6_info *rt; |
| 1346 | struct fib6_node *fn; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | /* |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1349 | * Get the "current" route for this destination and |
| 1350 | * check if the redirect has come from approriate router. |
| 1351 | * |
| 1352 | * RFC 2461 specifies that redirects should only be |
| 1353 | * accepted if they come from the nexthop to the target. |
| 1354 | * Due to the way the routes are chosen, this notion |
| 1355 | * is a bit fuzzy and one might need to check all possible |
| 1356 | * routes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1359 | read_lock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1360 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1361 | restart: |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1362 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1363 | /* |
| 1364 | * Current route is on-link; redirect is always invalid. |
| 1365 | * |
| 1366 | * Seems, previous statement is not true. It could |
| 1367 | * be node, which looks for us as on-link (f.e. proxy ndisc) |
| 1368 | * But then router serving it might decide, that we should |
| 1369 | * know truth 8)8) --ANK (980726). |
| 1370 | */ |
| 1371 | if (rt6_check_expired(rt)) |
| 1372 | continue; |
| 1373 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1374 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1375 | if (fl->oif != rt->rt6i_dev->ifindex) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1376 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1377 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1378 | continue; |
| 1379 | break; |
| 1380 | } |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1381 | |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1382 | if (!rt) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1383 | rt = net->ipv6.ip6_null_entry; |
| 1384 | BACKTRACK(net, &fl->fl6_src); |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1385 | out: |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1386 | dst_hold(&rt->u.dst); |
| 1387 | |
| 1388 | read_unlock_bh(&table->tb6_lock); |
| 1389 | |
| 1390 | return rt; |
| 1391 | }; |
| 1392 | |
| 1393 | static struct rt6_info *ip6_route_redirect(struct in6_addr *dest, |
| 1394 | struct in6_addr *src, |
| 1395 | struct in6_addr *gateway, |
| 1396 | struct net_device *dev) |
| 1397 | { |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1398 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1399 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1400 | struct ip6rd_flowi rdfl = { |
| 1401 | .fl = { |
| 1402 | .oif = dev->ifindex, |
| 1403 | .nl_u = { |
| 1404 | .ip6_u = { |
| 1405 | .daddr = *dest, |
| 1406 | .saddr = *src, |
| 1407 | }, |
| 1408 | }, |
| 1409 | }, |
| 1410 | .gateway = *gateway, |
| 1411 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1412 | |
| 1413 | if (rt6_need_strict(dest)) |
| 1414 | flags |= RT6_LOOKUP_F_IFACE; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1415 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1416 | return (struct rt6_info *)fib6_rule_lookup(net, (struct flowi *)&rdfl, |
Daniel Lezcano | 58f09b7 | 2008-03-03 23:25:27 -0800 | [diff] [blame] | 1417 | flags, __ip6_route_redirect); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1418 | } |
| 1419 | |
| 1420 | void rt6_redirect(struct in6_addr *dest, struct in6_addr *src, |
| 1421 | struct in6_addr *saddr, |
| 1422 | struct neighbour *neigh, u8 *lladdr, int on_link) |
| 1423 | { |
| 1424 | struct rt6_info *rt, *nrt = NULL; |
| 1425 | struct netevent_redirect netevent; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1426 | struct net *net = dev_net(neigh->dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1427 | |
| 1428 | rt = ip6_route_redirect(dest, src, saddr, neigh->dev); |
| 1429 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1430 | if (rt == net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | if (net_ratelimit()) |
| 1432 | printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop " |
| 1433 | "for redirect target\n"); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1434 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | } |
| 1436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | /* |
| 1438 | * We have finally decided to accept it. |
| 1439 | */ |
| 1440 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1441 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 1443 | NEIGH_UPDATE_F_OVERRIDE| |
| 1444 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 1445 | NEIGH_UPDATE_F_ISROUTER)) |
| 1446 | ); |
| 1447 | |
| 1448 | /* |
| 1449 | * Redirect received -> path was valid. |
| 1450 | * Look, redirects are sent only in response to data packets, |
| 1451 | * so that this nexthop apparently is reachable. --ANK |
| 1452 | */ |
| 1453 | dst_confirm(&rt->u.dst); |
| 1454 | |
| 1455 | /* Duplicate redirect: silently ignore. */ |
| 1456 | if (neigh == rt->u.dst.neighbour) |
| 1457 | goto out; |
| 1458 | |
| 1459 | nrt = ip6_rt_copy(rt); |
| 1460 | if (nrt == NULL) |
| 1461 | goto out; |
| 1462 | |
| 1463 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 1464 | if (on_link) |
| 1465 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 1466 | |
| 1467 | ipv6_addr_copy(&nrt->rt6i_dst.addr, dest); |
| 1468 | nrt->rt6i_dst.plen = 128; |
| 1469 | nrt->u.dst.flags |= DST_HOST; |
| 1470 | |
| 1471 | ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key); |
| 1472 | nrt->rt6i_nexthop = neigh_clone(neigh); |
| 1473 | /* Reset pmtu, it may be better */ |
| 1474 | nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1475 | nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dev_net(neigh->dev), |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1476 | dst_mtu(&nrt->u.dst)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1478 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | goto out; |
| 1480 | |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 1481 | netevent.old = &rt->u.dst; |
| 1482 | netevent.new = &nrt->u.dst; |
| 1483 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 1484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | if (rt->rt6i_flags&RTF_CACHE) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1486 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | return; |
| 1488 | } |
| 1489 | |
| 1490 | out: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1491 | dst_release(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | return; |
| 1493 | } |
| 1494 | |
| 1495 | /* |
| 1496 | * Handle ICMP "packet too big" messages |
| 1497 | * i.e. Path MTU discovery |
| 1498 | */ |
| 1499 | |
| 1500 | void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, |
| 1501 | struct net_device *dev, u32 pmtu) |
| 1502 | { |
| 1503 | struct rt6_info *rt, *nrt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1504 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | int allfrag = 0; |
| 1506 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1507 | rt = rt6_lookup(net, daddr, saddr, dev->ifindex, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | if (rt == NULL) |
| 1509 | return; |
| 1510 | |
| 1511 | if (pmtu >= dst_mtu(&rt->u.dst)) |
| 1512 | goto out; |
| 1513 | |
| 1514 | if (pmtu < IPV6_MIN_MTU) { |
| 1515 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1516 | * According to RFC2460, PMTU is set to the IPv6 Minimum Link |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | * MTU (1280) and a fragment header should always be included |
| 1518 | * after a node receiving Too Big message reporting PMTU is |
| 1519 | * less than the IPv6 Minimum Link MTU. |
| 1520 | */ |
| 1521 | pmtu = IPV6_MIN_MTU; |
| 1522 | allfrag = 1; |
| 1523 | } |
| 1524 | |
| 1525 | /* New mtu received -> path was valid. |
| 1526 | They are sent only in response to data packets, |
| 1527 | so that this nexthop apparently is reachable. --ANK |
| 1528 | */ |
| 1529 | dst_confirm(&rt->u.dst); |
| 1530 | |
| 1531 | /* Host route. If it is static, it would be better |
| 1532 | not to override it, but add new one, so that |
| 1533 | when cache entry will expire old pmtu |
| 1534 | would return automatically. |
| 1535 | */ |
| 1536 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1537 | rt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1538 | if (allfrag) |
| 1539 | rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1540 | dst_set_expires(&rt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES; |
| 1542 | goto out; |
| 1543 | } |
| 1544 | |
| 1545 | /* Network route. |
| 1546 | Two cases are possible: |
| 1547 | 1. It is connected route. Action: COW |
| 1548 | 2. It is gatewayed route or NONEXTHOP route. Action: clone it. |
| 1549 | */ |
YOSHIFUJI Hideaki | d5315b50 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1550 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1551 | nrt = rt6_alloc_cow(rt, daddr, saddr); |
YOSHIFUJI Hideaki | d5315b50 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1552 | else |
| 1553 | nrt = rt6_alloc_clone(rt, daddr); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1554 | |
YOSHIFUJI Hideaki | d5315b50 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1555 | if (nrt) { |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1556 | nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1557 | if (allfrag) |
| 1558 | nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 1559 | |
| 1560 | /* According to RFC 1981, detecting PMTU increase shouldn't be |
| 1561 | * happened within 5 mins, the recommended timer is 10 mins. |
| 1562 | * Here this route expiration time is set to ip6_rt_mtu_expires |
| 1563 | * which is 10 mins. After 10 mins the decreased pmtu is expired |
| 1564 | * and detecting PMTU increase will be automatically happened. |
| 1565 | */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1566 | dst_set_expires(&nrt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1567 | nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; |
| 1568 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1569 | ip6_ins_rt(nrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | out: |
| 1572 | dst_release(&rt->u.dst); |
| 1573 | } |
| 1574 | |
| 1575 | /* |
| 1576 | * Misc support functions |
| 1577 | */ |
| 1578 | |
| 1579 | static struct rt6_info * ip6_rt_copy(struct rt6_info *ort) |
| 1580 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1581 | struct net *net = dev_net(ort->rt6i_dev); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1582 | struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | |
| 1584 | if (rt) { |
| 1585 | rt->u.dst.input = ort->u.dst.input; |
| 1586 | rt->u.dst.output = ort->u.dst.output; |
| 1587 | |
| 1588 | memcpy(rt->u.dst.metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32)); |
Ville Nuorvala | 22e1e4d | 2006-10-16 22:14:26 -0700 | [diff] [blame] | 1589 | rt->u.dst.error = ort->u.dst.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | rt->u.dst.dev = ort->u.dst.dev; |
| 1591 | if (rt->u.dst.dev) |
| 1592 | dev_hold(rt->u.dst.dev); |
| 1593 | rt->rt6i_idev = ort->rt6i_idev; |
| 1594 | if (rt->rt6i_idev) |
| 1595 | in6_dev_hold(rt->rt6i_idev); |
| 1596 | rt->u.dst.lastuse = jiffies; |
| 1597 | rt->rt6i_expires = 0; |
| 1598 | |
| 1599 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 1600 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 1601 | rt->rt6i_metric = 0; |
| 1602 | |
| 1603 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1604 | #ifdef CONFIG_IPV6_SUBTREES |
| 1605 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1606 | #endif |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1607 | rt->rt6i_table = ort->rt6i_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | } |
| 1609 | return rt; |
| 1610 | } |
| 1611 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1612 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1613 | static struct rt6_info *rt6_get_route_info(struct net *net, |
| 1614 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1615 | struct in6_addr *gwaddr, int ifindex) |
| 1616 | { |
| 1617 | struct fib6_node *fn; |
| 1618 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1619 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1620 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1621 | table = fib6_get_table(net, RT6_TABLE_INFO); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1622 | if (table == NULL) |
| 1623 | return NULL; |
| 1624 | |
| 1625 | write_lock_bh(&table->tb6_lock); |
| 1626 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1627 | if (!fn) |
| 1628 | goto out; |
| 1629 | |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1630 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1631 | if (rt->rt6i_dev->ifindex != ifindex) |
| 1632 | continue; |
| 1633 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 1634 | continue; |
| 1635 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 1636 | continue; |
| 1637 | dst_hold(&rt->u.dst); |
| 1638 | break; |
| 1639 | } |
| 1640 | out: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1641 | write_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1642 | return rt; |
| 1643 | } |
| 1644 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1645 | static struct rt6_info *rt6_add_route_info(struct net *net, |
| 1646 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1647 | struct in6_addr *gwaddr, int ifindex, |
| 1648 | unsigned pref) |
| 1649 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1650 | struct fib6_config cfg = { |
| 1651 | .fc_table = RT6_TABLE_INFO, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1652 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1653 | .fc_ifindex = ifindex, |
| 1654 | .fc_dst_len = prefixlen, |
| 1655 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 1656 | RTF_UP | RTF_PREF(pref), |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1657 | .fc_nlinfo.pid = 0, |
| 1658 | .fc_nlinfo.nlh = NULL, |
| 1659 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1660 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1661 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1662 | ipv6_addr_copy(&cfg.fc_dst, prefix); |
| 1663 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
| 1664 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 1665 | /* We should treat it as a default route if prefix length is 0. */ |
| 1666 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1667 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1668 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1669 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1670 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1671 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1672 | } |
| 1673 | #endif |
| 1674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev) |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1676 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1678 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1680 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1681 | if (table == NULL) |
| 1682 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1684 | write_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1685 | for (rt = table->tb6_root.leaf; rt; rt=rt->u.dst.rt6_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | if (dev == rt->rt6i_dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 1687 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 1689 | break; |
| 1690 | } |
| 1691 | if (rt) |
| 1692 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1693 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | return rt; |
| 1695 | } |
| 1696 | |
| 1697 | struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 1698 | struct net_device *dev, |
| 1699 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1701 | struct fib6_config cfg = { |
| 1702 | .fc_table = RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1703 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1704 | .fc_ifindex = dev->ifindex, |
| 1705 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 1706 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1707 | .fc_nlinfo.pid = 0, |
| 1708 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1709 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1710 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1712 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1714 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | return rt6_get_dflt_router(gwaddr, dev); |
| 1717 | } |
| 1718 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1719 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | { |
| 1721 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1722 | struct fib6_table *table; |
| 1723 | |
| 1724 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1725 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1726 | if (table == NULL) |
| 1727 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | |
| 1729 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1730 | read_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1731 | for (rt = table->tb6_root.leaf; rt; rt = rt->u.dst.rt6_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) { |
| 1733 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1734 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1735 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | goto restart; |
| 1737 | } |
| 1738 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1739 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | } |
| 1741 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1742 | static void rtmsg_to_fib6_config(struct net *net, |
| 1743 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1744 | struct fib6_config *cfg) |
| 1745 | { |
| 1746 | memset(cfg, 0, sizeof(*cfg)); |
| 1747 | |
| 1748 | cfg->fc_table = RT6_TABLE_MAIN; |
| 1749 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 1750 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 1751 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 1752 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 1753 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 1754 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 1755 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1756 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 1757 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1758 | ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst); |
| 1759 | ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src); |
| 1760 | ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway); |
| 1761 | } |
| 1762 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1763 | 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] | 1764 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1765 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | struct in6_rtmsg rtmsg; |
| 1767 | int err; |
| 1768 | |
| 1769 | switch(cmd) { |
| 1770 | case SIOCADDRT: /* Add a route */ |
| 1771 | case SIOCDELRT: /* Delete a route */ |
| 1772 | if (!capable(CAP_NET_ADMIN)) |
| 1773 | return -EPERM; |
| 1774 | err = copy_from_user(&rtmsg, arg, |
| 1775 | sizeof(struct in6_rtmsg)); |
| 1776 | if (err) |
| 1777 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1778 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1779 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | rtnl_lock(); |
| 1782 | switch (cmd) { |
| 1783 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1784 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | break; |
| 1786 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1787 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | break; |
| 1789 | default: |
| 1790 | err = -EINVAL; |
| 1791 | } |
| 1792 | rtnl_unlock(); |
| 1793 | |
| 1794 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | |
| 1797 | return -EINVAL; |
| 1798 | } |
| 1799 | |
| 1800 | /* |
| 1801 | * Drop the packet on the floor |
| 1802 | */ |
| 1803 | |
Ilpo Järvinen | 50eb431 | 2008-01-12 03:21:00 -0800 | [diff] [blame] | 1804 | static int ip6_pkt_drop(struct sk_buff *skb, int code, int ipstats_mib_noroutes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1806 | int type; |
| 1807 | switch (ipstats_mib_noroutes) { |
| 1808 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1809 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1810 | if (type == IPV6_ADDR_ANY || type == IPV6_ADDR_RESERVED) { |
| 1811 | IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INADDRERRORS); |
| 1812 | break; |
| 1813 | } |
| 1814 | /* FALLTHROUGH */ |
| 1815 | case IPSTATS_MIB_OUTNOROUTES: |
| 1816 | IP6_INC_STATS(ip6_dst_idev(skb->dst), ipstats_mib_noroutes); |
| 1817 | break; |
| 1818 | } |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1819 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | kfree_skb(skb); |
| 1821 | return 0; |
| 1822 | } |
| 1823 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1824 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 1825 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1826 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1827 | } |
| 1828 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1829 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | { |
| 1831 | skb->dev = skb->dst->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1832 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | } |
| 1834 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1835 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 1836 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1837 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 1838 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1839 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1840 | } |
| 1841 | |
| 1842 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) |
| 1843 | { |
| 1844 | skb->dev = skb->dst->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1845 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1846 | } |
| 1847 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1848 | #endif |
| 1849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | /* |
| 1851 | * Allocate a dst for local (unicast / anycast) address. |
| 1852 | */ |
| 1853 | |
| 1854 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 1855 | const struct in6_addr *addr, |
| 1856 | int anycast) |
| 1857 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1858 | struct net *net = dev_net(idev->dev); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1859 | struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | |
| 1861 | if (rt == NULL) |
| 1862 | return ERR_PTR(-ENOMEM); |
| 1863 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1864 | dev_hold(net->loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | in6_dev_hold(idev); |
| 1866 | |
| 1867 | rt->u.dst.flags = DST_HOST; |
| 1868 | rt->u.dst.input = ip6_input; |
| 1869 | rt->u.dst.output = ip6_output; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1870 | rt->rt6i_dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | rt->rt6i_idev = idev; |
| 1872 | rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev); |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1873 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
| 1875 | rt->u.dst.obsolete = -1; |
| 1876 | |
| 1877 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 1878 | if (anycast) |
| 1879 | rt->rt6i_flags |= RTF_ANYCAST; |
| 1880 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | rt->rt6i_flags |= RTF_LOCAL; |
| 1882 | rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 1883 | if (rt->rt6i_nexthop == NULL) { |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1884 | dst_free(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | return ERR_PTR(-ENOMEM); |
| 1886 | } |
| 1887 | |
| 1888 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 1889 | rt->rt6i_dst.plen = 128; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1890 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | |
| 1892 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 1893 | |
| 1894 | return rt; |
| 1895 | } |
| 1896 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1897 | struct arg_dev_net { |
| 1898 | struct net_device *dev; |
| 1899 | struct net *net; |
| 1900 | }; |
| 1901 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 1903 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1904 | struct net_device *dev = ((struct arg_dev_net *)arg)->dev; |
| 1905 | struct net *net = ((struct arg_dev_net *)arg)->net; |
| 1906 | |
| 1907 | if (((void *)rt->rt6i_dev == dev || dev == NULL) && |
| 1908 | rt != net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | RT6_TRACE("deleted by ifdown %p\n", rt); |
| 1910 | return -1; |
| 1911 | } |
| 1912 | return 0; |
| 1913 | } |
| 1914 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 1915 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1917 | struct arg_dev_net adn = { |
| 1918 | .dev = dev, |
| 1919 | .net = net, |
| 1920 | }; |
| 1921 | |
| 1922 | fib6_clean_all(net, fib6_ifdown, 0, &adn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | } |
| 1924 | |
| 1925 | struct rt6_mtu_change_arg |
| 1926 | { |
| 1927 | struct net_device *dev; |
| 1928 | unsigned mtu; |
| 1929 | }; |
| 1930 | |
| 1931 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 1932 | { |
| 1933 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 1934 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1935 | struct net *net = dev_net(arg->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
| 1937 | /* In IPv6 pmtu discovery is not optional, |
| 1938 | so that RTAX_MTU lock cannot disable it. |
| 1939 | We still use this lock to block changes |
| 1940 | caused by addrconf/ndisc. |
| 1941 | */ |
| 1942 | |
| 1943 | idev = __in6_dev_get(arg->dev); |
| 1944 | if (idev == NULL) |
| 1945 | return 0; |
| 1946 | |
| 1947 | /* For administrative MTU increase, there is no way to discover |
| 1948 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 1949 | Since RFC 1981 doesn't include administrative MTU increase |
| 1950 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 1951 | */ |
| 1952 | /* |
| 1953 | If new MTU is less than route PMTU, this new MTU will be the |
| 1954 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 1955 | decreases; if new MTU is greater than route PMTU, and the |
| 1956 | old MTU is the lowest MTU in the path, update the route PMTU |
| 1957 | to reflect the increase. In this case if the other nodes' MTU |
| 1958 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 1959 | PMTU discouvery. |
| 1960 | */ |
| 1961 | if (rt->rt6i_dev == arg->dev && |
| 1962 | !dst_metric_locked(&rt->u.dst, RTAX_MTU) && |
Jim Paris | 2371779 | 2008-01-31 16:36:25 -0800 | [diff] [blame] | 1963 | (dst_mtu(&rt->u.dst) >= arg->mtu || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1964 | (dst_mtu(&rt->u.dst) < arg->mtu && |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 1965 | dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1967 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu); |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 1968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | return 0; |
| 1970 | } |
| 1971 | |
| 1972 | void rt6_mtu_change(struct net_device *dev, unsigned mtu) |
| 1973 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1974 | struct rt6_mtu_change_arg arg = { |
| 1975 | .dev = dev, |
| 1976 | .mtu = mtu, |
| 1977 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1979 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | } |
| 1981 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 1982 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 1983 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1984 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 1985 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1986 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 1987 | [RTA_METRICS] = { .type = NLA_NESTED }, |
| 1988 | }; |
| 1989 | |
| 1990 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 1991 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1993 | struct rtmsg *rtm; |
| 1994 | struct nlattr *tb[RTA_MAX+1]; |
| 1995 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1997 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 1998 | if (err < 0) |
| 1999 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2001 | err = -EINVAL; |
| 2002 | rtm = nlmsg_data(nlh); |
| 2003 | memset(cfg, 0, sizeof(*cfg)); |
| 2004 | |
| 2005 | cfg->fc_table = rtm->rtm_table; |
| 2006 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2007 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2008 | cfg->fc_flags = RTF_UP; |
| 2009 | cfg->fc_protocol = rtm->rtm_protocol; |
| 2010 | |
| 2011 | if (rtm->rtm_type == RTN_UNREACHABLE) |
| 2012 | cfg->fc_flags |= RTF_REJECT; |
| 2013 | |
| 2014 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; |
| 2015 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2016 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2017 | |
| 2018 | if (tb[RTA_GATEWAY]) { |
| 2019 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); |
| 2020 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2022 | |
| 2023 | if (tb[RTA_DST]) { |
| 2024 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2025 | |
| 2026 | if (nla_len(tb[RTA_DST]) < plen) |
| 2027 | goto errout; |
| 2028 | |
| 2029 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2031 | |
| 2032 | if (tb[RTA_SRC]) { |
| 2033 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2034 | |
| 2035 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2036 | goto errout; |
| 2037 | |
| 2038 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2040 | |
| 2041 | if (tb[RTA_OIF]) |
| 2042 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2043 | |
| 2044 | if (tb[RTA_PRIORITY]) |
| 2045 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2046 | |
| 2047 | if (tb[RTA_METRICS]) { |
| 2048 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2049 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2051 | |
| 2052 | if (tb[RTA_TABLE]) |
| 2053 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2054 | |
| 2055 | err = 0; |
| 2056 | errout: |
| 2057 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | } |
| 2059 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2060 | 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] | 2061 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2062 | struct fib6_config cfg; |
| 2063 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2065 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2066 | if (err < 0) |
| 2067 | return err; |
| 2068 | |
| 2069 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | } |
| 2071 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2072 | 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] | 2073 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2074 | struct fib6_config cfg; |
| 2075 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2077 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2078 | if (err < 0) |
| 2079 | return err; |
| 2080 | |
| 2081 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | } |
| 2083 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2084 | static inline size_t rt6_nlmsg_size(void) |
| 2085 | { |
| 2086 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2087 | + nla_total_size(16) /* RTA_SRC */ |
| 2088 | + nla_total_size(16) /* RTA_DST */ |
| 2089 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 2090 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 2091 | + nla_total_size(4) /* RTA_TABLE */ |
| 2092 | + nla_total_size(4) /* RTA_IIF */ |
| 2093 | + nla_total_size(4) /* RTA_OIF */ |
| 2094 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 2095 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2096 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
| 2097 | } |
| 2098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 2100 | struct in6_addr *dst, struct in6_addr *src, |
| 2101 | int iif, int type, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2102 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | { |
| 2104 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2105 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2106 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2107 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | |
| 2109 | if (prefix) { /* user wants prefix routes only */ |
| 2110 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 2111 | /* success since this is not a prefix route */ |
| 2112 | return 1; |
| 2113 | } |
| 2114 | } |
| 2115 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2116 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags); |
| 2117 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2118 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2119 | |
| 2120 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | rtm->rtm_family = AF_INET6; |
| 2122 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 2123 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 2124 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2125 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2126 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2127 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2128 | table = RT6_TABLE_UNSPEC; |
| 2129 | rtm->rtm_table = table; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2130 | NLA_PUT_U32(skb, RTA_TABLE, table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | if (rt->rt6i_flags&RTF_REJECT) |
| 2132 | rtm->rtm_type = RTN_UNREACHABLE; |
| 2133 | else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK)) |
| 2134 | rtm->rtm_type = RTN_LOCAL; |
| 2135 | else |
| 2136 | rtm->rtm_type = RTN_UNICAST; |
| 2137 | rtm->rtm_flags = 0; |
| 2138 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 2139 | rtm->rtm_protocol = rt->rt6i_protocol; |
| 2140 | if (rt->rt6i_flags&RTF_DYNAMIC) |
| 2141 | rtm->rtm_protocol = RTPROT_REDIRECT; |
| 2142 | else if (rt->rt6i_flags & RTF_ADDRCONF) |
| 2143 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 2144 | else if (rt->rt6i_flags&RTF_DEFAULT) |
| 2145 | rtm->rtm_protocol = RTPROT_RA; |
| 2146 | |
| 2147 | if (rt->rt6i_flags&RTF_CACHE) |
| 2148 | rtm->rtm_flags |= RTM_F_CLONED; |
| 2149 | |
| 2150 | if (dst) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2151 | NLA_PUT(skb, RTA_DST, 16, dst); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2152 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | } else if (rtm->rtm_dst_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2154 | NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | #ifdef CONFIG_IPV6_SUBTREES |
| 2156 | if (src) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2157 | NLA_PUT(skb, RTA_SRC, 16, src); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2158 | rtm->rtm_src_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | } else if (rtm->rtm_src_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2160 | NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2162 | if (iif) { |
| 2163 | #ifdef CONFIG_IPV6_MROUTE |
| 2164 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
| 2165 | int err = ip6mr_get_route(skb, rtm, nowait); |
| 2166 | if (err <= 0) { |
| 2167 | if (!nowait) { |
| 2168 | if (err == 0) |
| 2169 | return 0; |
| 2170 | goto nla_put_failure; |
| 2171 | } else { |
| 2172 | if (err == -EMSGSIZE) |
| 2173 | goto nla_put_failure; |
| 2174 | } |
| 2175 | } |
| 2176 | } else |
| 2177 | #endif |
| 2178 | NLA_PUT_U32(skb, RTA_IIF, iif); |
| 2179 | } else if (dst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | struct in6_addr saddr_buf; |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 2181 | if (ipv6_dev_get_saddr(ip6_dst_idev(&rt->u.dst)->dev, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 2182 | dst, 0, &saddr_buf) == 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2183 | NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2187 | goto nla_put_failure; |
| 2188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | if (rt->u.dst.neighbour) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2190 | NLA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key); |
| 2191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | if (rt->u.dst.dev) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2193 | NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex); |
| 2194 | |
| 2195 | NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric); |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2196 | |
YOSHIFUJI Hideaki | 36e3dea | 2008-05-13 02:52:55 +0900 | [diff] [blame] | 2197 | if (!(rt->rt6i_flags & RTF_EXPIRES)) |
| 2198 | expires = 0; |
| 2199 | else if (rt->rt6i_expires - jiffies < INT_MAX) |
| 2200 | expires = rt->rt6i_expires - jiffies; |
| 2201 | else |
| 2202 | expires = INT_MAX; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 2203 | |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2204 | if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0, |
| 2205 | expires, rt->u.dst.error) < 0) |
| 2206 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2208 | return nlmsg_end(skb, nlh); |
| 2209 | |
| 2210 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2211 | nlmsg_cancel(skb, nlh); |
| 2212 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | } |
| 2214 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 2215 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | { |
| 2217 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 2218 | int prefix; |
| 2219 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2220 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 2221 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 2223 | } else |
| 2224 | prefix = 0; |
| 2225 | |
| 2226 | return rt6_fill_node(arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
| 2227 | NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2228 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | } |
| 2230 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2231 | 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] | 2232 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2233 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2234 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2236 | struct sk_buff *skb; |
| 2237 | struct rtmsg *rtm; |
| 2238 | struct flowi fl; |
| 2239 | int err, iif = 0; |
| 2240 | |
| 2241 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2242 | if (err < 0) |
| 2243 | goto errout; |
| 2244 | |
| 2245 | err = -EINVAL; |
| 2246 | memset(&fl, 0, sizeof(fl)); |
| 2247 | |
| 2248 | if (tb[RTA_SRC]) { |
| 2249 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 2250 | goto errout; |
| 2251 | |
| 2252 | ipv6_addr_copy(&fl.fl6_src, nla_data(tb[RTA_SRC])); |
| 2253 | } |
| 2254 | |
| 2255 | if (tb[RTA_DST]) { |
| 2256 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 2257 | goto errout; |
| 2258 | |
| 2259 | ipv6_addr_copy(&fl.fl6_dst, nla_data(tb[RTA_DST])); |
| 2260 | } |
| 2261 | |
| 2262 | if (tb[RTA_IIF]) |
| 2263 | iif = nla_get_u32(tb[RTA_IIF]); |
| 2264 | |
| 2265 | if (tb[RTA_OIF]) |
| 2266 | fl.oif = nla_get_u32(tb[RTA_OIF]); |
| 2267 | |
| 2268 | if (iif) { |
| 2269 | struct net_device *dev; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2270 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2271 | if (!dev) { |
| 2272 | err = -ENODEV; |
| 2273 | goto errout; |
| 2274 | } |
| 2275 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | |
| 2277 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2278 | if (skb == NULL) { |
| 2279 | err = -ENOBUFS; |
| 2280 | goto errout; |
| 2281 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | |
| 2283 | /* Reserve room for dummy headers, this skb can pass |
| 2284 | through good chunk of routing engine. |
| 2285 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 2286 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 2288 | |
Daniel Lezcano | 8a3edd8 | 2008-03-07 11:14:16 -0800 | [diff] [blame] | 2289 | rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | skb->dst = &rt->u.dst; |
| 2291 | |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2292 | err = rt6_fill_node(skb, rt, &fl.fl6_dst, &fl.fl6_src, iif, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | RTM_NEWROUTE, NETLINK_CB(in_skb).pid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2294 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2296 | kfree_skb(skb); |
| 2297 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | } |
| 2299 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2300 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2301 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2302 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | } |
| 2304 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2305 | 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] | 2306 | { |
| 2307 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2308 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2309 | u32 seq; |
| 2310 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2312 | err = -ENOBUFS; |
| 2313 | seq = info->nlh != NULL ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2314 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2315 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2316 | if (skb == NULL) |
| 2317 | goto errout; |
| 2318 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2319 | err = rt6_fill_node(skb, rt, NULL, NULL, 0, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2320 | event, info->pid, seq, 0, 0, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2321 | if (err < 0) { |
| 2322 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 2323 | WARN_ON(err == -EMSGSIZE); |
| 2324 | kfree_skb(skb); |
| 2325 | goto errout; |
| 2326 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2327 | err = rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE, |
| 2328 | info->nlh, gfp_any()); |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2329 | errout: |
| 2330 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2331 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | } |
| 2333 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2334 | static int ip6_route_dev_notify(struct notifier_block *this, |
| 2335 | unsigned long event, void *data) |
| 2336 | { |
| 2337 | struct net_device *dev = (struct net_device *)data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2338 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2339 | |
| 2340 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
| 2341 | net->ipv6.ip6_null_entry->u.dst.dev = dev; |
| 2342 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 2343 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2344 | net->ipv6.ip6_prohibit_entry->u.dst.dev = dev; |
| 2345 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
| 2346 | net->ipv6.ip6_blk_hole_entry->u.dst.dev = dev; |
| 2347 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 2348 | #endif |
| 2349 | } |
| 2350 | |
| 2351 | return NOTIFY_OK; |
| 2352 | } |
| 2353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | /* |
| 2355 | * /proc |
| 2356 | */ |
| 2357 | |
| 2358 | #ifdef CONFIG_PROC_FS |
| 2359 | |
| 2360 | #define RT6_INFO_LEN (32 + 4 + 32 + 4 + 32 + 40 + 5 + 1) |
| 2361 | |
| 2362 | struct rt6_proc_arg |
| 2363 | { |
| 2364 | char *buffer; |
| 2365 | int offset; |
| 2366 | int length; |
| 2367 | int skip; |
| 2368 | int len; |
| 2369 | }; |
| 2370 | |
| 2371 | static int rt6_info_route(struct rt6_info *rt, void *p_arg) |
| 2372 | { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2373 | struct seq_file *m = p_arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2375 | seq_printf(m, NIP6_SEQFMT " %02x ", NIP6(rt->rt6i_dst.addr), |
| 2376 | rt->rt6i_dst.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | |
| 2378 | #ifdef CONFIG_IPV6_SUBTREES |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2379 | seq_printf(m, NIP6_SEQFMT " %02x ", NIP6(rt->rt6i_src.addr), |
| 2380 | rt->rt6i_src.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | #else |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2382 | seq_puts(m, "00000000000000000000000000000000 00 "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | #endif |
| 2384 | |
| 2385 | if (rt->rt6i_nexthop) { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2386 | seq_printf(m, NIP6_SEQFMT, |
| 2387 | NIP6(*((struct in6_addr *)rt->rt6i_nexthop->primary_key))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | } else { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2389 | seq_puts(m, "00000000000000000000000000000000"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | } |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2391 | seq_printf(m, " %08x %08x %08x %08x %8s\n", |
| 2392 | rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt), |
| 2393 | rt->u.dst.__use, rt->rt6i_flags, |
| 2394 | rt->rt6i_dev ? rt->rt6i_dev->name : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | return 0; |
| 2396 | } |
| 2397 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2398 | static int ipv6_route_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | { |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2400 | struct net *net = (struct net *)m->private; |
| 2401 | fib6_clean_all(net, rt6_info_route, 0, m); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2402 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | } |
| 2404 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2405 | static int ipv6_route_open(struct inode *inode, struct file *file) |
| 2406 | { |
Pavel Emelyanov | a233352 | 2008-03-26 16:49:40 -0700 | [diff] [blame] | 2407 | int err; |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2408 | struct net *net = get_proc_net(inode); |
| 2409 | if (!net) |
| 2410 | return -ENXIO; |
Pavel Emelyanov | a233352 | 2008-03-26 16:49:40 -0700 | [diff] [blame] | 2411 | |
| 2412 | err = single_open(file, ipv6_route_show, net); |
| 2413 | if (err < 0) { |
| 2414 | put_net(net); |
| 2415 | return err; |
| 2416 | } |
| 2417 | |
| 2418 | return 0; |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2419 | } |
| 2420 | |
| 2421 | static int ipv6_route_release(struct inode *inode, struct file *file) |
| 2422 | { |
| 2423 | struct seq_file *seq = file->private_data; |
| 2424 | struct net *net = seq->private; |
| 2425 | put_net(net); |
| 2426 | return single_release(inode, file); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2427 | } |
| 2428 | |
| 2429 | static const struct file_operations ipv6_route_proc_fops = { |
| 2430 | .owner = THIS_MODULE, |
| 2431 | .open = ipv6_route_open, |
| 2432 | .read = seq_read, |
| 2433 | .llseek = seq_lseek, |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2434 | .release = ipv6_route_release, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2435 | }; |
| 2436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 2438 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2439 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2441 | net->ipv6.rt6_stats->fib_nodes, |
| 2442 | net->ipv6.rt6_stats->fib_route_nodes, |
| 2443 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 2444 | net->ipv6.rt6_stats->fib_rt_entries, |
| 2445 | net->ipv6.rt6_stats->fib_rt_cache, |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2446 | atomic_read(&net->ipv6.ip6_dst_ops->entries), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2447 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | |
| 2449 | return 0; |
| 2450 | } |
| 2451 | |
| 2452 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 2453 | { |
Pavel Emelyanov | a233352 | 2008-03-26 16:49:40 -0700 | [diff] [blame] | 2454 | int err; |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2455 | struct net *net = get_proc_net(inode); |
Pavel Emelyanov | a233352 | 2008-03-26 16:49:40 -0700 | [diff] [blame] | 2456 | if (!net) |
| 2457 | return -ENXIO; |
| 2458 | |
| 2459 | err = single_open(file, rt6_stats_seq_show, net); |
| 2460 | if (err < 0) { |
| 2461 | put_net(net); |
| 2462 | return err; |
| 2463 | } |
| 2464 | |
| 2465 | return 0; |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2466 | } |
| 2467 | |
| 2468 | static int rt6_stats_seq_release(struct inode *inode, struct file *file) |
| 2469 | { |
| 2470 | struct seq_file *seq = file->private_data; |
| 2471 | struct net *net = (struct net *)seq->private; |
| 2472 | put_net(net); |
| 2473 | return single_release(inode, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | } |
| 2475 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2476 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | .owner = THIS_MODULE, |
| 2478 | .open = rt6_stats_seq_open, |
| 2479 | .read = seq_read, |
| 2480 | .llseek = seq_lseek, |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2481 | .release = rt6_stats_seq_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | }; |
| 2483 | #endif /* CONFIG_PROC_FS */ |
| 2484 | |
| 2485 | #ifdef CONFIG_SYSCTL |
| 2486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | static |
| 2488 | int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp, |
| 2489 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 2490 | { |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2491 | struct net *net = current->nsproxy->net_ns; |
| 2492 | int delay = net->ipv6.sysctl.flush_delay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | if (write) { |
| 2494 | proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2495 | fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | return 0; |
| 2497 | } else |
| 2498 | return -EINVAL; |
| 2499 | } |
| 2500 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2501 | ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2502 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2504 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 2506 | .mode = 0200, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2507 | .proc_handler = &ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | }, |
| 2509 | { |
| 2510 | .ctl_name = NET_IPV6_ROUTE_GC_THRESH, |
| 2511 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2512 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | .maxlen = sizeof(int), |
| 2514 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2515 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | }, |
| 2517 | { |
| 2518 | .ctl_name = NET_IPV6_ROUTE_MAX_SIZE, |
| 2519 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2520 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | .maxlen = sizeof(int), |
| 2522 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2523 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | }, |
| 2525 | { |
| 2526 | .ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL, |
| 2527 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2528 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | .maxlen = sizeof(int), |
| 2530 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2531 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | .strategy = &sysctl_jiffies, |
| 2533 | }, |
| 2534 | { |
| 2535 | .ctl_name = NET_IPV6_ROUTE_GC_TIMEOUT, |
| 2536 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2537 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | .maxlen = sizeof(int), |
| 2539 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2540 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | .strategy = &sysctl_jiffies, |
| 2542 | }, |
| 2543 | { |
| 2544 | .ctl_name = NET_IPV6_ROUTE_GC_INTERVAL, |
| 2545 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2546 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | .maxlen = sizeof(int), |
| 2548 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2549 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | .strategy = &sysctl_jiffies, |
| 2551 | }, |
| 2552 | { |
| 2553 | .ctl_name = NET_IPV6_ROUTE_GC_ELASTICITY, |
| 2554 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2555 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | .maxlen = sizeof(int), |
| 2557 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2558 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | .strategy = &sysctl_jiffies, |
| 2560 | }, |
| 2561 | { |
| 2562 | .ctl_name = NET_IPV6_ROUTE_MTU_EXPIRES, |
| 2563 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2564 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | .maxlen = sizeof(int), |
| 2566 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2567 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | .strategy = &sysctl_jiffies, |
| 2569 | }, |
| 2570 | { |
| 2571 | .ctl_name = NET_IPV6_ROUTE_MIN_ADVMSS, |
| 2572 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2573 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | .maxlen = sizeof(int), |
| 2575 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2576 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | .strategy = &sysctl_jiffies, |
| 2578 | }, |
| 2579 | { |
| 2580 | .ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS, |
| 2581 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2582 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | .maxlen = sizeof(int), |
| 2584 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2585 | .proc_handler = &proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | .strategy = &sysctl_ms_jiffies, |
| 2587 | }, |
| 2588 | { .ctl_name = 0 } |
| 2589 | }; |
| 2590 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2591 | struct ctl_table *ipv6_route_sysctl_init(struct net *net) |
| 2592 | { |
| 2593 | struct ctl_table *table; |
| 2594 | |
| 2595 | table = kmemdup(ipv6_route_table_template, |
| 2596 | sizeof(ipv6_route_table_template), |
| 2597 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2598 | |
| 2599 | if (table) { |
| 2600 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2601 | table[1].data = &net->ipv6.ip6_dst_ops->gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2602 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 2603 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 2604 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 2605 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 2606 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 2607 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 2608 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
| 2609 | } |
| 2610 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2611 | return table; |
| 2612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | #endif |
| 2614 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2615 | static int ip6_route_net_init(struct net *net) |
| 2616 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 2617 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2618 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2619 | net->ipv6.ip6_dst_ops = kmemdup(&ip6_dst_ops_template, |
| 2620 | sizeof(*net->ipv6.ip6_dst_ops), |
| 2621 | GFP_KERNEL); |
| 2622 | if (!net->ipv6.ip6_dst_ops) |
| 2623 | goto out; |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2624 | net->ipv6.ip6_dst_ops->dst_net = hold_net(net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2625 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2626 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 2627 | sizeof(*net->ipv6.ip6_null_entry), |
| 2628 | GFP_KERNEL); |
| 2629 | if (!net->ipv6.ip6_null_entry) |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2630 | goto out_ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2631 | net->ipv6.ip6_null_entry->u.dst.path = |
| 2632 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2633 | net->ipv6.ip6_null_entry->u.dst.ops = net->ipv6.ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2634 | |
| 2635 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2636 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 2637 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 2638 | GFP_KERNEL); |
| 2639 | if (!net->ipv6.ip6_prohibit_entry) { |
| 2640 | kfree(net->ipv6.ip6_null_entry); |
| 2641 | goto out; |
| 2642 | } |
| 2643 | net->ipv6.ip6_prohibit_entry->u.dst.path = |
| 2644 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2645 | net->ipv6.ip6_prohibit_entry->u.dst.ops = net->ipv6.ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2646 | |
| 2647 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 2648 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 2649 | GFP_KERNEL); |
| 2650 | if (!net->ipv6.ip6_blk_hole_entry) { |
| 2651 | kfree(net->ipv6.ip6_null_entry); |
| 2652 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2653 | goto out; |
| 2654 | } |
| 2655 | net->ipv6.ip6_blk_hole_entry->u.dst.path = |
| 2656 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2657 | net->ipv6.ip6_blk_hole_entry->u.dst.ops = net->ipv6.ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2658 | #endif |
| 2659 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2660 | #ifdef CONFIG_PROC_FS |
| 2661 | proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops); |
| 2662 | proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops); |
| 2663 | #endif |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 2664 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 2665 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2666 | ret = 0; |
| 2667 | out: |
| 2668 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2669 | |
| 2670 | out_ip6_dst_ops: |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2671 | release_net(net->ipv6.ip6_dst_ops->dst_net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2672 | kfree(net->ipv6.ip6_dst_ops); |
| 2673 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2674 | } |
| 2675 | |
| 2676 | static void ip6_route_net_exit(struct net *net) |
| 2677 | { |
| 2678 | #ifdef CONFIG_PROC_FS |
| 2679 | proc_net_remove(net, "ipv6_route"); |
| 2680 | proc_net_remove(net, "rt6_stats"); |
| 2681 | #endif |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2682 | kfree(net->ipv6.ip6_null_entry); |
| 2683 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2684 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2685 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 2686 | #endif |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2687 | release_net(net->ipv6.ip6_dst_ops->dst_net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2688 | kfree(net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2689 | } |
| 2690 | |
| 2691 | static struct pernet_operations ip6_route_net_ops = { |
| 2692 | .init = ip6_route_net_init, |
| 2693 | .exit = ip6_route_net_exit, |
| 2694 | }; |
| 2695 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2696 | static struct notifier_block ip6_route_dev_notifier = { |
| 2697 | .notifier_call = ip6_route_dev_notify, |
| 2698 | .priority = 0, |
| 2699 | }; |
| 2700 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2701 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2703 | int ret; |
| 2704 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2705 | ret = -ENOMEM; |
| 2706 | ip6_dst_ops_template.kmem_cachep = |
| 2707 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 2708 | SLAB_HWCACHE_ALIGN, NULL); |
| 2709 | if (!ip6_dst_ops_template.kmem_cachep) |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2710 | goto out;; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 2711 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2712 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 2713 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2714 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2715 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2716 | /* Registering of the loopback is done before this portion of code, |
| 2717 | * the loopback reference in rt6_info will not be taken, do it |
| 2718 | * manually for init_net */ |
| 2719 | init_net.ipv6.ip6_null_entry->u.dst.dev = init_net.loopback_dev; |
| 2720 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2721 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2722 | init_net.ipv6.ip6_prohibit_entry->u.dst.dev = init_net.loopback_dev; |
| 2723 | init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2724 | init_net.ipv6.ip6_blk_hole_entry->u.dst.dev = init_net.loopback_dev; |
| 2725 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2726 | #endif |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2727 | ret = fib6_init(); |
| 2728 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2729 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2730 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2731 | ret = xfrm6_init(); |
| 2732 | if (ret) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2733 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 2734 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2735 | ret = fib6_rules_init(); |
| 2736 | if (ret) |
| 2737 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 2738 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2739 | ret = -ENOBUFS; |
| 2740 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL) || |
| 2741 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL) || |
| 2742 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL)) |
| 2743 | goto fib6_rules_init; |
| 2744 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2745 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2746 | if (ret) |
| 2747 | goto fib6_rules_init; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2748 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2749 | out: |
| 2750 | return ret; |
| 2751 | |
| 2752 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2753 | fib6_rules_cleanup(); |
| 2754 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2755 | xfrm6_fini(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2756 | out_fib6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2757 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2758 | out_register_subsys: |
| 2759 | unregister_pernet_subsys(&ip6_route_net_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2760 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2761 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2762 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | } |
| 2764 | |
| 2765 | void ip6_route_cleanup(void) |
| 2766 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2767 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 2768 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2771 | unregister_pernet_subsys(&ip6_route_net_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2772 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | } |