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, |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 240 | struct in6_addr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 242 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
| 244 | struct rt6_info *local = NULL; |
| 245 | struct rt6_info *sprt; |
| 246 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 247 | if (!oif && ipv6_addr_any(saddr)) |
| 248 | goto out; |
| 249 | |
| 250 | for (sprt = rt; sprt; sprt = sprt->u.dst.rt6_next) { |
| 251 | struct net_device *dev = sprt->rt6i_dev; |
| 252 | |
| 253 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | if (dev->ifindex == oif) |
| 255 | return sprt; |
| 256 | if (dev->flags & IFF_LOOPBACK) { |
| 257 | if (sprt->rt6i_idev == NULL || |
| 258 | sprt->rt6i_idev->dev->ifindex != oif) { |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 259 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | continue; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 261 | if (local && (!oif || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | local->rt6i_idev->dev->ifindex == oif)) |
| 263 | continue; |
| 264 | } |
| 265 | local = sprt; |
| 266 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 267 | } else { |
| 268 | if (ipv6_chk_addr(net, saddr, dev, |
| 269 | flags & RT6_LOOKUP_F_IFACE)) |
| 270 | return sprt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 272 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 274 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (local) |
| 276 | return local; |
| 277 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 278 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 279 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 281 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | return rt; |
| 283 | } |
| 284 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 285 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 286 | static void rt6_probe(struct rt6_info *rt) |
| 287 | { |
| 288 | struct neighbour *neigh = rt ? rt->rt6i_nexthop : NULL; |
| 289 | /* |
| 290 | * Okay, this does not seem to be appropriate |
| 291 | * for now, however, we need to check if it |
| 292 | * is really so; aka Router Reachability Probing. |
| 293 | * |
| 294 | * Router Reachability Probe MUST be rate-limited |
| 295 | * to no more than one per minute. |
| 296 | */ |
| 297 | if (!neigh || (neigh->nud_state & NUD_VALID)) |
| 298 | return; |
| 299 | read_lock_bh(&neigh->lock); |
| 300 | if (!(neigh->nud_state & NUD_VALID) && |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 301 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 302 | struct in6_addr mcaddr; |
| 303 | struct in6_addr *target; |
| 304 | |
| 305 | neigh->updated = jiffies; |
| 306 | read_unlock_bh(&neigh->lock); |
| 307 | |
| 308 | target = (struct in6_addr *)&neigh->primary_key; |
| 309 | addrconf_addr_solict_mult(target, &mcaddr); |
| 310 | ndisc_send_ns(rt->rt6i_dev, NULL, target, &mcaddr, NULL); |
| 311 | } else |
| 312 | read_unlock_bh(&neigh->lock); |
| 313 | } |
| 314 | #else |
| 315 | static inline void rt6_probe(struct rt6_info *rt) |
| 316 | { |
| 317 | return; |
| 318 | } |
| 319 | #endif |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 322 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 324 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 326 | struct net_device *dev = rt->rt6i_dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 327 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 328 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 329 | if ((dev->flags & IFF_LOOPBACK) && |
| 330 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 331 | return 1; |
| 332 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 335 | static inline int rt6_check_neigh(struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 337 | struct neighbour *neigh = rt->rt6i_nexthop; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 338 | int m; |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 339 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 340 | !(rt->rt6i_flags & RTF_GATEWAY)) |
| 341 | m = 1; |
| 342 | else if (neigh) { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 343 | read_lock_bh(&neigh->lock); |
| 344 | if (neigh->nud_state & NUD_VALID) |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 345 | m = 2; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 346 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 347 | else if (neigh->nud_state & NUD_FAILED) |
| 348 | m = 0; |
| 349 | #endif |
| 350 | else |
YOSHIFUJI Hideaki | ea73ee2 | 2006-11-06 09:45:44 -0800 | [diff] [blame] | 351 | m = 1; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 352 | read_unlock_bh(&neigh->lock); |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 353 | } else |
| 354 | m = 0; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 355 | return m; |
| 356 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 358 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 359 | int strict) |
| 360 | { |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 361 | int m, n; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 362 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 363 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 364 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 365 | return -1; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 366 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 367 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 368 | #endif |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 369 | n = rt6_check_neigh(rt); |
YOSHIFUJI Hideaki | 557e92e | 2006-11-06 09:45:45 -0800 | [diff] [blame] | 370 | if (!n && (strict & RT6_LOOKUP_F_REACHABLE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 371 | return -1; |
| 372 | return m; |
| 373 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 375 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
| 376 | int *mpri, struct rt6_info *match) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 377 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 378 | int m; |
| 379 | |
| 380 | if (rt6_check_expired(rt)) |
| 381 | goto out; |
| 382 | |
| 383 | m = rt6_score_route(rt, oif, strict); |
| 384 | if (m < 0) |
| 385 | goto out; |
| 386 | |
| 387 | if (m > *mpri) { |
| 388 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 389 | rt6_probe(match); |
| 390 | *mpri = m; |
| 391 | match = rt; |
| 392 | } else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 393 | rt6_probe(rt); |
| 394 | } |
| 395 | |
| 396 | out: |
| 397 | return match; |
| 398 | } |
| 399 | |
| 400 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 401 | struct rt6_info *rr_head, |
| 402 | u32 metric, int oif, int strict) |
| 403 | { |
| 404 | struct rt6_info *rt, *match; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 405 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 407 | match = NULL; |
| 408 | for (rt = rr_head; rt && rt->rt6i_metric == metric; |
| 409 | rt = rt->u.dst.rt6_next) |
| 410 | match = find_match(rt, oif, strict, &mpri, match); |
| 411 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; |
| 412 | rt = rt->u.dst.rt6_next) |
| 413 | match = find_match(rt, oif, strict, &mpri, match); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 414 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 415 | return match; |
| 416 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 417 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 418 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 419 | { |
| 420 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 421 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 423 | RT6_TRACE("%s(fn->leaf=%p, oif=%d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 424 | __func__, fn->leaf, oif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 426 | rt0 = fn->rr_ptr; |
| 427 | if (!rt0) |
| 428 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 430 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 432 | if (!match && |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 433 | (strict & RT6_LOOKUP_F_REACHABLE)) { |
| 434 | struct rt6_info *next = rt0->u.dst.rt6_next; |
| 435 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 436 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 437 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 438 | next = fn->leaf; |
| 439 | |
| 440 | if (next != rt0) |
| 441 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 444 | RT6_TRACE("%s() => %p\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 445 | __func__, match); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 447 | net = dev_net(rt0->rt6i_dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 448 | return (match ? match : net->ipv6.ip6_null_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
| 450 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 451 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 452 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
| 453 | struct in6_addr *gwaddr) |
| 454 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 455 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 456 | struct route_info *rinfo = (struct route_info *) opt; |
| 457 | struct in6_addr prefix_buf, *prefix; |
| 458 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 459 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 460 | struct rt6_info *rt; |
| 461 | |
| 462 | if (len < sizeof(struct route_info)) { |
| 463 | return -EINVAL; |
| 464 | } |
| 465 | |
| 466 | /* Sanity check for prefix_len and length */ |
| 467 | if (rinfo->length > 3) { |
| 468 | return -EINVAL; |
| 469 | } else if (rinfo->prefix_len > 128) { |
| 470 | return -EINVAL; |
| 471 | } else if (rinfo->prefix_len > 64) { |
| 472 | if (rinfo->length < 2) { |
| 473 | return -EINVAL; |
| 474 | } |
| 475 | } else if (rinfo->prefix_len > 0) { |
| 476 | if (rinfo->length < 1) { |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | pref = rinfo->route_pref; |
| 482 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
| 483 | pref = ICMPV6_ROUTER_PREF_MEDIUM; |
| 484 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 485 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 486 | |
| 487 | if (rinfo->length == 3) |
| 488 | prefix = (struct in6_addr *)rinfo->prefix; |
| 489 | else { |
| 490 | /* this function is safe */ |
| 491 | ipv6_addr_prefix(&prefix_buf, |
| 492 | (struct in6_addr *)rinfo->prefix, |
| 493 | rinfo->prefix_len); |
| 494 | prefix = &prefix_buf; |
| 495 | } |
| 496 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 497 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr, |
| 498 | dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 499 | |
| 500 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 501 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 502 | rt = NULL; |
| 503 | } |
| 504 | |
| 505 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 506 | 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] | 507 | pref); |
| 508 | else if (rt) |
| 509 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 510 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 511 | |
| 512 | if (rt) { |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 513 | if (!addrconf_finite_timeout(lifetime)) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 514 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 515 | } else { |
| 516 | rt->rt6i_expires = jiffies + HZ * lifetime; |
| 517 | rt->rt6i_flags |= RTF_EXPIRES; |
| 518 | } |
| 519 | dst_release(&rt->u.dst); |
| 520 | } |
| 521 | return 0; |
| 522 | } |
| 523 | #endif |
| 524 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 525 | #define BACKTRACK(__net, saddr) \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 526 | do { \ |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 527 | if (rt == __net->ipv6.ip6_null_entry) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 528 | struct fib6_node *pn; \ |
Ville Nuorvala | e0eda7b | 2006-10-16 22:11:11 -0700 | [diff] [blame] | 529 | while (1) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 530 | if (fn->fn_flags & RTN_TL_ROOT) \ |
| 531 | goto out; \ |
| 532 | pn = fn->parent; \ |
| 533 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ |
Kim Nordlund | 8bce65b | 2006-12-13 16:38:29 -0800 | [diff] [blame] | 534 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 535 | else \ |
| 536 | fn = pn; \ |
| 537 | if (fn->fn_flags & RTN_RTINFO) \ |
| 538 | goto restart; \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 539 | } \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 540 | } \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 541 | } while(0) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 542 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 543 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 544 | struct fib6_table *table, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 545 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
| 547 | struct fib6_node *fn; |
| 548 | struct rt6_info *rt; |
| 549 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 550 | read_lock_bh(&table->tb6_lock); |
| 551 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
| 552 | restart: |
| 553 | rt = fn->leaf; |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 554 | rt = rt6_device_match(net, rt, &fl->fl6_src, fl->oif, flags); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 555 | BACKTRACK(net, &fl->fl6_src); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 556 | out: |
Pavel Emelyanov | 03f49f3 | 2007-11-10 21:28:34 -0800 | [diff] [blame] | 557 | dst_use(&rt->u.dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 558 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 559 | return rt; |
| 560 | |
| 561 | } |
| 562 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 563 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 564 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 565 | { |
| 566 | struct flowi fl = { |
| 567 | .oif = oif, |
| 568 | .nl_u = { |
| 569 | .ip6_u = { |
| 570 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 571 | }, |
| 572 | }, |
| 573 | }; |
| 574 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 575 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 576 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 577 | if (saddr) { |
| 578 | memcpy(&fl.fl6_src, saddr, sizeof(*saddr)); |
| 579 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 580 | } |
| 581 | |
Daniel Lezcano | 606a2b4 | 2008-03-04 13:45:59 -0800 | [diff] [blame] | 582 | dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 583 | if (dst->error == 0) |
| 584 | return (struct rt6_info *) dst; |
| 585 | |
| 586 | dst_release(dst); |
| 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | return NULL; |
| 589 | } |
| 590 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 591 | EXPORT_SYMBOL(rt6_lookup); |
| 592 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 593 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | It takes new route entry, the addition fails by any reason the |
| 595 | route is freed. In any case, if caller does not hold it, it may |
| 596 | be destroyed. |
| 597 | */ |
| 598 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 599 | 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] | 600 | { |
| 601 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 602 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 604 | table = rt->rt6i_table; |
| 605 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 606 | err = fib6_add(&table->tb6_root, rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 607 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
| 609 | return err; |
| 610 | } |
| 611 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 612 | int ip6_ins_rt(struct rt6_info *rt) |
| 613 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 614 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 615 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 616 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 617 | return __ip6_ins_rt(rt, &info); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 618 | } |
| 619 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 620 | static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr, |
| 621 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | struct rt6_info *rt; |
| 624 | |
| 625 | /* |
| 626 | * Clone the route. |
| 627 | */ |
| 628 | |
| 629 | rt = ip6_rt_copy(ort); |
| 630 | |
| 631 | if (rt) { |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 632 | if (!(rt->rt6i_flags&RTF_GATEWAY)) { |
| 633 | if (rt->rt6i_dst.plen != 128 && |
| 634 | ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)) |
| 635 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | ipv6_addr_copy(&rt->rt6i_gateway, daddr); |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 637 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 639 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | rt->rt6i_dst.plen = 128; |
| 641 | rt->rt6i_flags |= RTF_CACHE; |
| 642 | rt->u.dst.flags |= DST_HOST; |
| 643 | |
| 644 | #ifdef CONFIG_IPV6_SUBTREES |
| 645 | if (rt->rt6i_src.plen && saddr) { |
| 646 | ipv6_addr_copy(&rt->rt6i_src.addr, saddr); |
| 647 | rt->rt6i_src.plen = 128; |
| 648 | } |
| 649 | #endif |
| 650 | |
| 651 | rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 652 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 653 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 655 | return rt; |
| 656 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 658 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr) |
| 659 | { |
| 660 | struct rt6_info *rt = ip6_rt_copy(ort); |
| 661 | if (rt) { |
| 662 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
| 663 | rt->rt6i_dst.plen = 128; |
| 664 | rt->rt6i_flags |= RTF_CACHE; |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 665 | rt->u.dst.flags |= DST_HOST; |
| 666 | rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop); |
| 667 | } |
| 668 | return rt; |
| 669 | } |
| 670 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 671 | static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif, |
| 672 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | { |
| 674 | struct fib6_node *fn; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 675 | struct rt6_info *rt, *nrt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 676 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | int attempts = 3; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 678 | int err; |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 679 | int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 681 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
| 683 | relookup: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 684 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 686 | restart_2: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 687 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | restart: |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 690 | rt = rt6_select(fn, oif, strict | reachable); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 691 | |
| 692 | BACKTRACK(net, &fl->fl6_src); |
| 693 | if (rt == net->ipv6.ip6_null_entry || |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 694 | rt->rt6i_flags & RTF_CACHE) |
YOSHIFUJI Hideaki | 1ddef044 | 2006-03-20 17:01:24 -0800 | [diff] [blame] | 695 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 697 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 698 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 699 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 700 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 701 | nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 702 | else { |
| 703 | #if CLONE_OFFLINK_ROUTE |
| 704 | nrt = rt6_alloc_clone(rt, &fl->fl6_dst); |
| 705 | #else |
| 706 | goto out2; |
| 707 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 709 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 710 | dst_release(&rt->u.dst); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 711 | rt = nrt ? : net->ipv6.ip6_null_entry; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 712 | |
| 713 | dst_hold(&rt->u.dst); |
| 714 | if (nrt) { |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 715 | err = ip6_ins_rt(nrt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 716 | if (!err) |
| 717 | goto out2; |
| 718 | } |
| 719 | |
| 720 | if (--attempts <= 0) |
| 721 | goto out2; |
| 722 | |
| 723 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 724 | * Race condition! In the gap, when table->tb6_lock was |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 725 | * released someone could insert this route. Relookup. |
| 726 | */ |
| 727 | dst_release(&rt->u.dst); |
| 728 | goto relookup; |
| 729 | |
| 730 | out: |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 731 | if (reachable) { |
| 732 | reachable = 0; |
| 733 | goto restart_2; |
| 734 | } |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 735 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 736 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | out2: |
| 738 | rt->u.dst.lastuse = jiffies; |
| 739 | rt->u.dst.__use++; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 740 | |
| 741 | return rt; |
| 742 | } |
| 743 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 744 | 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] | 745 | struct flowi *fl, int flags) |
| 746 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 747 | return ip6_pol_route(net, table, fl->iif, fl, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 748 | } |
| 749 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 750 | void ip6_route_input(struct sk_buff *skb) |
| 751 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 752 | struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 753 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 754 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 755 | struct flowi fl = { |
| 756 | .iif = skb->dev->ifindex, |
| 757 | .nl_u = { |
| 758 | .ip6_u = { |
| 759 | .daddr = iph->daddr, |
| 760 | .saddr = iph->saddr, |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 761 | .flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 762 | }, |
| 763 | }, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 764 | .mark = skb->mark, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 765 | .proto = iph->nexthdr, |
| 766 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 767 | |
| 768 | if (rt6_need_strict(&iph->daddr)) |
| 769 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 770 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 771 | skb->dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 772 | } |
| 773 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 774 | 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] | 775 | struct flowi *fl, int flags) |
| 776 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 777 | return ip6_pol_route(net, table, fl->oif, fl, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 778 | } |
| 779 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 780 | struct dst_entry * ip6_route_output(struct net *net, struct sock *sk, |
| 781 | struct flowi *fl) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 782 | { |
| 783 | int flags = 0; |
| 784 | |
| 785 | if (rt6_need_strict(&fl->fl6_dst)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 786 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 787 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 788 | if (!ipv6_addr_any(&fl->fl6_src)) |
| 789 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 790 | else if (sk) { |
| 791 | unsigned int prefs = inet6_sk(sk)->srcprefs; |
| 792 | if (prefs & IPV6_PREFER_SRC_TMP) |
| 793 | flags |= RT6_LOOKUP_F_SRCPREF_TMP; |
| 794 | if (prefs & IPV6_PREFER_SRC_PUBLIC) |
| 795 | flags |= RT6_LOOKUP_F_SRCPREF_PUBLIC; |
| 796 | if (prefs & IPV6_PREFER_SRC_COA) |
| 797 | flags |= RT6_LOOKUP_F_SRCPREF_COA; |
| 798 | } |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 799 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 800 | return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 803 | EXPORT_SYMBOL(ip6_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 805 | int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl) |
| 806 | { |
| 807 | struct rt6_info *ort = (struct rt6_info *) *dstp; |
| 808 | struct rt6_info *rt = (struct rt6_info *) |
| 809 | dst_alloc(&ip6_dst_blackhole_ops); |
| 810 | struct dst_entry *new = NULL; |
| 811 | |
| 812 | if (rt) { |
| 813 | new = &rt->u.dst; |
| 814 | |
| 815 | atomic_set(&new->__refcnt, 1); |
| 816 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 817 | new->input = dst_discard; |
| 818 | new->output = dst_discard; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 819 | |
| 820 | memcpy(new->metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32)); |
| 821 | new->dev = ort->u.dst.dev; |
| 822 | if (new->dev) |
| 823 | dev_hold(new->dev); |
| 824 | rt->rt6i_idev = ort->rt6i_idev; |
| 825 | if (rt->rt6i_idev) |
| 826 | in6_dev_hold(rt->rt6i_idev); |
| 827 | rt->rt6i_expires = 0; |
| 828 | |
| 829 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 830 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 831 | rt->rt6i_metric = 0; |
| 832 | |
| 833 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 834 | #ifdef CONFIG_IPV6_SUBTREES |
| 835 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 836 | #endif |
| 837 | |
| 838 | dst_free(new); |
| 839 | } |
| 840 | |
| 841 | dst_release(*dstp); |
| 842 | *dstp = new; |
| 843 | return (new ? 0 : -ENOMEM); |
| 844 | } |
| 845 | EXPORT_SYMBOL_GPL(ip6_dst_blackhole); |
| 846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | /* |
| 848 | * Destination cache support functions |
| 849 | */ |
| 850 | |
| 851 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 852 | { |
| 853 | struct rt6_info *rt; |
| 854 | |
| 855 | rt = (struct rt6_info *) dst; |
| 856 | |
| 857 | if (rt && rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie)) |
| 858 | return dst; |
| 859 | |
| 860 | return NULL; |
| 861 | } |
| 862 | |
| 863 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 864 | { |
| 865 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 866 | |
| 867 | if (rt) { |
| 868 | if (rt->rt6i_flags & RTF_CACHE) |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 869 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | else |
| 871 | dst_release(dst); |
| 872 | } |
| 873 | return NULL; |
| 874 | } |
| 875 | |
| 876 | static void ip6_link_failure(struct sk_buff *skb) |
| 877 | { |
| 878 | struct rt6_info *rt; |
| 879 | |
| 880 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev); |
| 881 | |
| 882 | rt = (struct rt6_info *) skb->dst; |
| 883 | if (rt) { |
| 884 | if (rt->rt6i_flags&RTF_CACHE) { |
| 885 | dst_set_expires(&rt->u.dst, 0); |
| 886 | rt->rt6i_flags |= RTF_EXPIRES; |
| 887 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) |
| 888 | rt->rt6i_node->fn_sernum = -1; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 893 | { |
| 894 | struct rt6_info *rt6 = (struct rt6_info*)dst; |
| 895 | |
| 896 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
| 897 | rt6->rt6i_flags |= RTF_MODIFIED; |
| 898 | if (mtu < IPV6_MIN_MTU) { |
| 899 | mtu = IPV6_MIN_MTU; |
| 900 | dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 901 | } |
| 902 | dst->metrics[RTAX_MTU-1] = mtu; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 903 | call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | } |
| 906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | static int ipv6_get_mtu(struct net_device *dev); |
| 908 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 909 | static inline unsigned int ipv6_advmss(struct net *net, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | { |
| 911 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 912 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 913 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 914 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 917 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 918 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 919 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | * rely only on pmtu discovery" |
| 921 | */ |
| 922 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 923 | mtu = IPV6_MAXPLEN; |
| 924 | return mtu; |
| 925 | } |
| 926 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 927 | static struct dst_entry *icmp6_dst_gc_list; |
| 928 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 929 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 930 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | struct neighbour *neigh, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 932 | const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | struct rt6_info *rt; |
| 935 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 936 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | if (unlikely(idev == NULL)) |
| 939 | return NULL; |
| 940 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 941 | rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | if (unlikely(rt == NULL)) { |
| 943 | in6_dev_put(idev); |
| 944 | goto out; |
| 945 | } |
| 946 | |
| 947 | dev_hold(dev); |
| 948 | if (neigh) |
| 949 | neigh_hold(neigh); |
| 950 | else |
| 951 | neigh = ndisc_get_neigh(dev, addr); |
| 952 | |
| 953 | rt->rt6i_dev = dev; |
| 954 | rt->rt6i_idev = idev; |
| 955 | rt->rt6i_nexthop = neigh; |
| 956 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 957 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255; |
| 958 | 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] | 959 | 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] | 960 | rt->u.dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
| 962 | #if 0 /* there's no chance to use these for ndisc */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 963 | rt->u.dst.flags = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST |
| 964 | ? DST_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | : 0; |
| 966 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 967 | rt->rt6i_dst.plen = 128; |
| 968 | #endif |
| 969 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 970 | spin_lock_bh(&icmp6_dst_lock); |
| 971 | rt->u.dst.next = icmp6_dst_gc_list; |
| 972 | icmp6_dst_gc_list = &rt->u.dst; |
| 973 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 975 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
| 977 | out: |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 978 | return &rt->u.dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | } |
| 980 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 981 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | { |
| 983 | struct dst_entry *dst, *next, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 984 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | next = NULL; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 987 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 988 | spin_lock_bh(&icmp6_dst_lock); |
| 989 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | while ((dst = *pprev) != NULL) { |
| 992 | if (!atomic_read(&dst->__refcnt)) { |
| 993 | *pprev = dst->next; |
| 994 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } else { |
| 996 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 997 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } |
| 999 | } |
| 1000 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1001 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1002 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1003 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1006 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1007 | void *arg) |
| 1008 | { |
| 1009 | struct dst_entry *dst, **pprev; |
| 1010 | |
| 1011 | spin_lock_bh(&icmp6_dst_lock); |
| 1012 | pprev = &icmp6_dst_gc_list; |
| 1013 | while ((dst = *pprev) != NULL) { |
| 1014 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1015 | if (func(rt, arg)) { |
| 1016 | *pprev = dst->next; |
| 1017 | dst_free(dst); |
| 1018 | } else { |
| 1019 | pprev = &dst->next; |
| 1020 | } |
| 1021 | } |
| 1022 | spin_unlock_bh(&icmp6_dst_lock); |
| 1023 | } |
| 1024 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1025 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | unsigned long now = jiffies; |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1028 | struct net *net = ops->dst_net; |
| 1029 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1030 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1031 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1032 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1033 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1035 | if (time_after(rt_last_gc + rt_min_interval, now) && |
| 1036 | atomic_read(&ops->entries) <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | goto out; |
| 1038 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1039 | net->ipv6.ip6_rt_gc_expire++; |
| 1040 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net); |
| 1041 | net->ipv6.ip6_rt_last_gc = now; |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1042 | if (atomic_read(&ops->entries) < ops->gc_thresh) |
| 1043 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1045 | net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity; |
| 1046 | return (atomic_read(&ops->entries) > rt_max_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /* Clean host part of a prefix. Not necessary in radix tree, |
| 1050 | but results in cleaner routing tables. |
| 1051 | |
| 1052 | Remove it only when all the things will work! |
| 1053 | */ |
| 1054 | |
| 1055 | static int ipv6_get_mtu(struct net_device *dev) |
| 1056 | { |
| 1057 | int mtu = IPV6_MIN_MTU; |
| 1058 | struct inet6_dev *idev; |
| 1059 | |
| 1060 | idev = in6_dev_get(dev); |
| 1061 | if (idev) { |
| 1062 | mtu = idev->cnf.mtu6; |
| 1063 | in6_dev_put(idev); |
| 1064 | } |
| 1065 | return mtu; |
| 1066 | } |
| 1067 | |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1068 | int ip6_dst_hoplimit(struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | { |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1070 | int hoplimit = dst_metric(dst, RTAX_HOPLIMIT); |
| 1071 | if (hoplimit < 0) { |
| 1072 | struct net_device *dev = dst->dev; |
| 1073 | struct inet6_dev *idev = in6_dev_get(dev); |
| 1074 | if (idev) { |
| 1075 | hoplimit = idev->cnf.hop_limit; |
| 1076 | in6_dev_put(idev); |
| 1077 | } else |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1078 | hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | } |
| 1080 | return hoplimit; |
| 1081 | } |
| 1082 | |
| 1083 | /* |
| 1084 | * |
| 1085 | */ |
| 1086 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1087 | int ip6_route_add(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | { |
| 1089 | int err; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1090 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | struct rt6_info *rt = NULL; |
| 1092 | struct net_device *dev = NULL; |
| 1093 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1094 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | int addr_type; |
| 1096 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1097 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | return -EINVAL; |
| 1099 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1100 | if (cfg->fc_src_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return -EINVAL; |
| 1102 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1103 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1105 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | if (!dev) |
| 1107 | goto out; |
| 1108 | idev = in6_dev_get(dev); |
| 1109 | if (!idev) |
| 1110 | goto out; |
| 1111 | } |
| 1112 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1113 | if (cfg->fc_metric == 0) |
| 1114 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1116 | table = fib6_new_table(net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1117 | if (table == NULL) { |
| 1118 | err = -ENOBUFS; |
| 1119 | goto out; |
| 1120 | } |
| 1121 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1122 | rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
| 1124 | if (rt == NULL) { |
| 1125 | err = -ENOMEM; |
| 1126 | goto out; |
| 1127 | } |
| 1128 | |
| 1129 | rt->u.dst.obsolete = -1; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1130 | rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ? |
| 1131 | jiffies + clock_t_to_jiffies(cfg->fc_expires) : |
| 1132 | 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1134 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1135 | cfg->fc_protocol = RTPROT_BOOT; |
| 1136 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1137 | |
| 1138 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | if (addr_type & IPV6_ADDR_MULTICAST) |
| 1141 | rt->u.dst.input = ip6_mc_input; |
| 1142 | else |
| 1143 | rt->u.dst.input = ip6_forward; |
| 1144 | |
| 1145 | rt->u.dst.output = ip6_output; |
| 1146 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1147 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1148 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | if (rt->rt6i_dst.plen == 128) |
| 1150 | rt->u.dst.flags = DST_HOST; |
| 1151 | |
| 1152 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1153 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1154 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | #endif |
| 1156 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1157 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
| 1159 | /* We cannot add true routes via loopback here, |
| 1160 | they would result in kernel looping; promote them to reject routes |
| 1161 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1162 | if ((cfg->fc_flags & RTF_REJECT) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) { |
| 1164 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1165 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | if (dev) { |
| 1167 | dev_put(dev); |
| 1168 | in6_dev_put(idev); |
| 1169 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1170 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | dev_hold(dev); |
| 1172 | idev = in6_dev_get(dev); |
| 1173 | if (!idev) { |
| 1174 | err = -ENODEV; |
| 1175 | goto out; |
| 1176 | } |
| 1177 | } |
| 1178 | rt->u.dst.output = ip6_pkt_discard_out; |
| 1179 | rt->u.dst.input = ip6_pkt_discard; |
| 1180 | rt->u.dst.error = -ENETUNREACH; |
| 1181 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
| 1182 | goto install_route; |
| 1183 | } |
| 1184 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1185 | if (cfg->fc_flags & RTF_GATEWAY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | struct in6_addr *gw_addr; |
| 1187 | int gwa_type; |
| 1188 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1189 | gw_addr = &cfg->fc_gateway; |
| 1190 | ipv6_addr_copy(&rt->rt6i_gateway, gw_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | gwa_type = ipv6_addr_type(gw_addr); |
| 1192 | |
| 1193 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1194 | struct rt6_info *grt; |
| 1195 | |
| 1196 | /* IPv6 strictly inhibits using not link-local |
| 1197 | addresses as nexthop address. |
| 1198 | Otherwise, router will not able to send redirects. |
| 1199 | It is very good, but in some (rare!) circumstances |
| 1200 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1201 | some exceptions. --ANK |
| 1202 | */ |
| 1203 | err = -EINVAL; |
| 1204 | if (!(gwa_type&IPV6_ADDR_UNICAST)) |
| 1205 | goto out; |
| 1206 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1207 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | |
| 1209 | err = -EHOSTUNREACH; |
| 1210 | if (grt == NULL) |
| 1211 | goto out; |
| 1212 | if (dev) { |
| 1213 | if (dev != grt->rt6i_dev) { |
| 1214 | dst_release(&grt->u.dst); |
| 1215 | goto out; |
| 1216 | } |
| 1217 | } else { |
| 1218 | dev = grt->rt6i_dev; |
| 1219 | idev = grt->rt6i_idev; |
| 1220 | dev_hold(dev); |
| 1221 | in6_dev_hold(grt->rt6i_idev); |
| 1222 | } |
| 1223 | if (!(grt->rt6i_flags&RTF_GATEWAY)) |
| 1224 | err = 0; |
| 1225 | dst_release(&grt->u.dst); |
| 1226 | |
| 1227 | if (err) |
| 1228 | goto out; |
| 1229 | } |
| 1230 | err = -EINVAL; |
| 1231 | if (dev == NULL || (dev->flags&IFF_LOOPBACK)) |
| 1232 | goto out; |
| 1233 | } |
| 1234 | |
| 1235 | err = -ENODEV; |
| 1236 | if (dev == NULL) |
| 1237 | goto out; |
| 1238 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1239 | if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev); |
| 1241 | if (IS_ERR(rt->rt6i_nexthop)) { |
| 1242 | err = PTR_ERR(rt->rt6i_nexthop); |
| 1243 | rt->rt6i_nexthop = NULL; |
| 1244 | goto out; |
| 1245 | } |
| 1246 | } |
| 1247 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1248 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | |
| 1250 | install_route: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1251 | if (cfg->fc_mx) { |
| 1252 | struct nlattr *nla; |
| 1253 | int remaining; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1255 | 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] | 1256 | int type = nla_type(nla); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1257 | |
| 1258 | if (type) { |
| 1259 | if (type > RTAX_MAX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | err = -EINVAL; |
| 1261 | goto out; |
| 1262 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1263 | |
| 1264 | rt->u.dst.metrics[type - 1] = nla_get_u32(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | } |
| 1267 | } |
| 1268 | |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1269 | if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
Rami Rosen | 1ca615f | 2008-08-06 02:34:21 -0700 | [diff] [blame] | 1271 | if (!dst_mtu(&rt->u.dst)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev); |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1273 | if (!dst_metric(&rt->u.dst, RTAX_ADVMSS)) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1274 | 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] | 1275 | rt->u.dst.dev = dev; |
| 1276 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1277 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1278 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1279 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1280 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1281 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
| 1283 | out: |
| 1284 | if (dev) |
| 1285 | dev_put(dev); |
| 1286 | if (idev) |
| 1287 | in6_dev_put(idev); |
| 1288 | if (rt) |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1289 | dst_free(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | return err; |
| 1291 | } |
| 1292 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1293 | 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] | 1294 | { |
| 1295 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1296 | struct fib6_table *table; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1297 | struct net *net = dev_net(rt->rt6i_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1299 | if (rt == net->ipv6.ip6_null_entry) |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 1300 | return -ENOENT; |
| 1301 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1302 | table = rt->rt6i_table; |
| 1303 | write_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1305 | err = fib6_del(rt, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | dst_release(&rt->u.dst); |
| 1307 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1308 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
| 1310 | return err; |
| 1311 | } |
| 1312 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1313 | int ip6_del_rt(struct rt6_info *rt) |
| 1314 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1315 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1316 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1317 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 1318 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1319 | } |
| 1320 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1321 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1323 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | struct fib6_node *fn; |
| 1325 | struct rt6_info *rt; |
| 1326 | int err = -ESRCH; |
| 1327 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1328 | table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1329 | if (table == NULL) |
| 1330 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1332 | read_lock_bh(&table->tb6_lock); |
| 1333 | |
| 1334 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1335 | &cfg->fc_dst, cfg->fc_dst_len, |
| 1336 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | if (fn) { |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1339 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1340 | if (cfg->fc_ifindex && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | (rt->rt6i_dev == NULL || |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1342 | rt->rt6i_dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1344 | if (cfg->fc_flags & RTF_GATEWAY && |
| 1345 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1347 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | continue; |
| 1349 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1350 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1352 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | } |
| 1354 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1355 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
| 1357 | return err; |
| 1358 | } |
| 1359 | |
| 1360 | /* |
| 1361 | * Handle redirects |
| 1362 | */ |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1363 | struct ip6rd_flowi { |
| 1364 | struct flowi fl; |
| 1365 | struct in6_addr gateway; |
| 1366 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1368 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1369 | struct fib6_table *table, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1370 | struct flowi *fl, |
| 1371 | int flags) |
| 1372 | { |
| 1373 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl; |
| 1374 | struct rt6_info *rt; |
| 1375 | struct fib6_node *fn; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | /* |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1378 | * Get the "current" route for this destination and |
| 1379 | * check if the redirect has come from approriate router. |
| 1380 | * |
| 1381 | * RFC 2461 specifies that redirects should only be |
| 1382 | * accepted if they come from the nexthop to the target. |
| 1383 | * Due to the way the routes are chosen, this notion |
| 1384 | * is a bit fuzzy and one might need to check all possible |
| 1385 | * routes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1388 | read_lock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1389 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1390 | restart: |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1391 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1392 | /* |
| 1393 | * Current route is on-link; redirect is always invalid. |
| 1394 | * |
| 1395 | * Seems, previous statement is not true. It could |
| 1396 | * be node, which looks for us as on-link (f.e. proxy ndisc) |
| 1397 | * But then router serving it might decide, that we should |
| 1398 | * know truth 8)8) --ANK (980726). |
| 1399 | */ |
| 1400 | if (rt6_check_expired(rt)) |
| 1401 | continue; |
| 1402 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1403 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1404 | if (fl->oif != rt->rt6i_dev->ifindex) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1405 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1406 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1407 | continue; |
| 1408 | break; |
| 1409 | } |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1410 | |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1411 | if (!rt) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1412 | rt = net->ipv6.ip6_null_entry; |
| 1413 | BACKTRACK(net, &fl->fl6_src); |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1414 | out: |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1415 | dst_hold(&rt->u.dst); |
| 1416 | |
| 1417 | read_unlock_bh(&table->tb6_lock); |
| 1418 | |
| 1419 | return rt; |
| 1420 | }; |
| 1421 | |
| 1422 | static struct rt6_info *ip6_route_redirect(struct in6_addr *dest, |
| 1423 | struct in6_addr *src, |
| 1424 | struct in6_addr *gateway, |
| 1425 | struct net_device *dev) |
| 1426 | { |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1427 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1428 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1429 | struct ip6rd_flowi rdfl = { |
| 1430 | .fl = { |
| 1431 | .oif = dev->ifindex, |
| 1432 | .nl_u = { |
| 1433 | .ip6_u = { |
| 1434 | .daddr = *dest, |
| 1435 | .saddr = *src, |
| 1436 | }, |
| 1437 | }, |
| 1438 | }, |
| 1439 | .gateway = *gateway, |
| 1440 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1441 | |
| 1442 | if (rt6_need_strict(dest)) |
| 1443 | flags |= RT6_LOOKUP_F_IFACE; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1444 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1445 | return (struct rt6_info *)fib6_rule_lookup(net, (struct flowi *)&rdfl, |
Daniel Lezcano | 58f09b7 | 2008-03-03 23:25:27 -0800 | [diff] [blame] | 1446 | flags, __ip6_route_redirect); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1447 | } |
| 1448 | |
| 1449 | void rt6_redirect(struct in6_addr *dest, struct in6_addr *src, |
| 1450 | struct in6_addr *saddr, |
| 1451 | struct neighbour *neigh, u8 *lladdr, int on_link) |
| 1452 | { |
| 1453 | struct rt6_info *rt, *nrt = NULL; |
| 1454 | struct netevent_redirect netevent; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1455 | struct net *net = dev_net(neigh->dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1456 | |
| 1457 | rt = ip6_route_redirect(dest, src, saddr, neigh->dev); |
| 1458 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1459 | if (rt == net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | if (net_ratelimit()) |
| 1461 | printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop " |
| 1462 | "for redirect target\n"); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1463 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | } |
| 1465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | /* |
| 1467 | * We have finally decided to accept it. |
| 1468 | */ |
| 1469 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1470 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 1472 | NEIGH_UPDATE_F_OVERRIDE| |
| 1473 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 1474 | NEIGH_UPDATE_F_ISROUTER)) |
| 1475 | ); |
| 1476 | |
| 1477 | /* |
| 1478 | * Redirect received -> path was valid. |
| 1479 | * Look, redirects are sent only in response to data packets, |
| 1480 | * so that this nexthop apparently is reachable. --ANK |
| 1481 | */ |
| 1482 | dst_confirm(&rt->u.dst); |
| 1483 | |
| 1484 | /* Duplicate redirect: silently ignore. */ |
| 1485 | if (neigh == rt->u.dst.neighbour) |
| 1486 | goto out; |
| 1487 | |
| 1488 | nrt = ip6_rt_copy(rt); |
| 1489 | if (nrt == NULL) |
| 1490 | goto out; |
| 1491 | |
| 1492 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 1493 | if (on_link) |
| 1494 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 1495 | |
| 1496 | ipv6_addr_copy(&nrt->rt6i_dst.addr, dest); |
| 1497 | nrt->rt6i_dst.plen = 128; |
| 1498 | nrt->u.dst.flags |= DST_HOST; |
| 1499 | |
| 1500 | ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key); |
| 1501 | nrt->rt6i_nexthop = neigh_clone(neigh); |
| 1502 | /* Reset pmtu, it may be better */ |
| 1503 | nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1504 | 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] | 1505 | dst_mtu(&nrt->u.dst)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1507 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | goto out; |
| 1509 | |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 1510 | netevent.old = &rt->u.dst; |
| 1511 | netevent.new = &nrt->u.dst; |
| 1512 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 1513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | if (rt->rt6i_flags&RTF_CACHE) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1515 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | return; |
| 1517 | } |
| 1518 | |
| 1519 | out: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1520 | dst_release(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | return; |
| 1522 | } |
| 1523 | |
| 1524 | /* |
| 1525 | * Handle ICMP "packet too big" messages |
| 1526 | * i.e. Path MTU discovery |
| 1527 | */ |
| 1528 | |
| 1529 | void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, |
| 1530 | struct net_device *dev, u32 pmtu) |
| 1531 | { |
| 1532 | struct rt6_info *rt, *nrt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1533 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | int allfrag = 0; |
| 1535 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1536 | rt = rt6_lookup(net, daddr, saddr, dev->ifindex, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | if (rt == NULL) |
| 1538 | return; |
| 1539 | |
| 1540 | if (pmtu >= dst_mtu(&rt->u.dst)) |
| 1541 | goto out; |
| 1542 | |
| 1543 | if (pmtu < IPV6_MIN_MTU) { |
| 1544 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1545 | * According to RFC2460, PMTU is set to the IPv6 Minimum Link |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | * MTU (1280) and a fragment header should always be included |
| 1547 | * after a node receiving Too Big message reporting PMTU is |
| 1548 | * less than the IPv6 Minimum Link MTU. |
| 1549 | */ |
| 1550 | pmtu = IPV6_MIN_MTU; |
| 1551 | allfrag = 1; |
| 1552 | } |
| 1553 | |
| 1554 | /* New mtu received -> path was valid. |
| 1555 | They are sent only in response to data packets, |
| 1556 | so that this nexthop apparently is reachable. --ANK |
| 1557 | */ |
| 1558 | dst_confirm(&rt->u.dst); |
| 1559 | |
| 1560 | /* Host route. If it is static, it would be better |
| 1561 | not to override it, but add new one, so that |
| 1562 | when cache entry will expire old pmtu |
| 1563 | would return automatically. |
| 1564 | */ |
| 1565 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1566 | rt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1567 | if (allfrag) |
| 1568 | rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1569 | 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] | 1570 | rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES; |
| 1571 | goto out; |
| 1572 | } |
| 1573 | |
| 1574 | /* Network route. |
| 1575 | Two cases are possible: |
| 1576 | 1. It is connected route. Action: COW |
| 1577 | 2. It is gatewayed route or NONEXTHOP route. Action: clone it. |
| 1578 | */ |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1579 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1580 | nrt = rt6_alloc_cow(rt, daddr, saddr); |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1581 | else |
| 1582 | nrt = rt6_alloc_clone(rt, daddr); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1583 | |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1584 | if (nrt) { |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1585 | nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1586 | if (allfrag) |
| 1587 | nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 1588 | |
| 1589 | /* According to RFC 1981, detecting PMTU increase shouldn't be |
| 1590 | * happened within 5 mins, the recommended timer is 10 mins. |
| 1591 | * Here this route expiration time is set to ip6_rt_mtu_expires |
| 1592 | * which is 10 mins. After 10 mins the decreased pmtu is expired |
| 1593 | * and detecting PMTU increase will be automatically happened. |
| 1594 | */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1595 | 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] | 1596 | nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; |
| 1597 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1598 | ip6_ins_rt(nrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | out: |
| 1601 | dst_release(&rt->u.dst); |
| 1602 | } |
| 1603 | |
| 1604 | /* |
| 1605 | * Misc support functions |
| 1606 | */ |
| 1607 | |
| 1608 | static struct rt6_info * ip6_rt_copy(struct rt6_info *ort) |
| 1609 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1610 | struct net *net = dev_net(ort->rt6i_dev); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1611 | struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | |
| 1613 | if (rt) { |
| 1614 | rt->u.dst.input = ort->u.dst.input; |
| 1615 | rt->u.dst.output = ort->u.dst.output; |
| 1616 | |
| 1617 | 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] | 1618 | rt->u.dst.error = ort->u.dst.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | rt->u.dst.dev = ort->u.dst.dev; |
| 1620 | if (rt->u.dst.dev) |
| 1621 | dev_hold(rt->u.dst.dev); |
| 1622 | rt->rt6i_idev = ort->rt6i_idev; |
| 1623 | if (rt->rt6i_idev) |
| 1624 | in6_dev_hold(rt->rt6i_idev); |
| 1625 | rt->u.dst.lastuse = jiffies; |
| 1626 | rt->rt6i_expires = 0; |
| 1627 | |
| 1628 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 1629 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 1630 | rt->rt6i_metric = 0; |
| 1631 | |
| 1632 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1633 | #ifdef CONFIG_IPV6_SUBTREES |
| 1634 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1635 | #endif |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1636 | rt->rt6i_table = ort->rt6i_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | } |
| 1638 | return rt; |
| 1639 | } |
| 1640 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1641 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1642 | static struct rt6_info *rt6_get_route_info(struct net *net, |
| 1643 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1644 | struct in6_addr *gwaddr, int ifindex) |
| 1645 | { |
| 1646 | struct fib6_node *fn; |
| 1647 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1648 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1649 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1650 | table = fib6_get_table(net, RT6_TABLE_INFO); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1651 | if (table == NULL) |
| 1652 | return NULL; |
| 1653 | |
| 1654 | write_lock_bh(&table->tb6_lock); |
| 1655 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1656 | if (!fn) |
| 1657 | goto out; |
| 1658 | |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1659 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1660 | if (rt->rt6i_dev->ifindex != ifindex) |
| 1661 | continue; |
| 1662 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 1663 | continue; |
| 1664 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 1665 | continue; |
| 1666 | dst_hold(&rt->u.dst); |
| 1667 | break; |
| 1668 | } |
| 1669 | out: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1670 | write_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1671 | return rt; |
| 1672 | } |
| 1673 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1674 | static struct rt6_info *rt6_add_route_info(struct net *net, |
| 1675 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1676 | struct in6_addr *gwaddr, int ifindex, |
| 1677 | unsigned pref) |
| 1678 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1679 | struct fib6_config cfg = { |
| 1680 | .fc_table = RT6_TABLE_INFO, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1681 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1682 | .fc_ifindex = ifindex, |
| 1683 | .fc_dst_len = prefixlen, |
| 1684 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 1685 | RTF_UP | RTF_PREF(pref), |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1686 | .fc_nlinfo.pid = 0, |
| 1687 | .fc_nlinfo.nlh = NULL, |
| 1688 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1689 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1690 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1691 | ipv6_addr_copy(&cfg.fc_dst, prefix); |
| 1692 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
| 1693 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 1694 | /* We should treat it as a default route if prefix length is 0. */ |
| 1695 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1696 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1697 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1698 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1699 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1700 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1701 | } |
| 1702 | #endif |
| 1703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | 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] | 1705 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1707 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1709 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1710 | if (table == NULL) |
| 1711 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1713 | write_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1714 | 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] | 1715 | if (dev == rt->rt6i_dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 1716 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 1718 | break; |
| 1719 | } |
| 1720 | if (rt) |
| 1721 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1722 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | return rt; |
| 1724 | } |
| 1725 | |
| 1726 | struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 1727 | struct net_device *dev, |
| 1728 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1730 | struct fib6_config cfg = { |
| 1731 | .fc_table = RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1732 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1733 | .fc_ifindex = dev->ifindex, |
| 1734 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 1735 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1736 | .fc_nlinfo.pid = 0, |
| 1737 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1738 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1739 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1741 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1743 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | return rt6_get_dflt_router(gwaddr, dev); |
| 1746 | } |
| 1747 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1748 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | { |
| 1750 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1751 | struct fib6_table *table; |
| 1752 | |
| 1753 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1754 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1755 | if (table == NULL) |
| 1756 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | |
| 1758 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1759 | read_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1760 | 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] | 1761 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) { |
| 1762 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1763 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1764 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | goto restart; |
| 1766 | } |
| 1767 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1768 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | } |
| 1770 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1771 | static void rtmsg_to_fib6_config(struct net *net, |
| 1772 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1773 | struct fib6_config *cfg) |
| 1774 | { |
| 1775 | memset(cfg, 0, sizeof(*cfg)); |
| 1776 | |
| 1777 | cfg->fc_table = RT6_TABLE_MAIN; |
| 1778 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 1779 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 1780 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 1781 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 1782 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 1783 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 1784 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1785 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 1786 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1787 | ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst); |
| 1788 | ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src); |
| 1789 | ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway); |
| 1790 | } |
| 1791 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1792 | 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] | 1793 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1794 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | struct in6_rtmsg rtmsg; |
| 1796 | int err; |
| 1797 | |
| 1798 | switch(cmd) { |
| 1799 | case SIOCADDRT: /* Add a route */ |
| 1800 | case SIOCDELRT: /* Delete a route */ |
| 1801 | if (!capable(CAP_NET_ADMIN)) |
| 1802 | return -EPERM; |
| 1803 | err = copy_from_user(&rtmsg, arg, |
| 1804 | sizeof(struct in6_rtmsg)); |
| 1805 | if (err) |
| 1806 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1807 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1808 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | rtnl_lock(); |
| 1811 | switch (cmd) { |
| 1812 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1813 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | break; |
| 1815 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1816 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | break; |
| 1818 | default: |
| 1819 | err = -EINVAL; |
| 1820 | } |
| 1821 | rtnl_unlock(); |
| 1822 | |
| 1823 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1824 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | |
| 1826 | return -EINVAL; |
| 1827 | } |
| 1828 | |
| 1829 | /* |
| 1830 | * Drop the packet on the floor |
| 1831 | */ |
| 1832 | |
Ilpo Järvinen | 50eb431 | 2008-01-12 03:21:00 -0800 | [diff] [blame] | 1833 | 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] | 1834 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1835 | int type; |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1836 | struct dst_entry *dst = skb->dst; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1837 | switch (ipstats_mib_noroutes) { |
| 1838 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1839 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1840 | if (type == IPV6_ADDR_ANY || type == IPV6_ADDR_RESERVED) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1841 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 1842 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1843 | break; |
| 1844 | } |
| 1845 | /* FALLTHROUGH */ |
| 1846 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1847 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 1848 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1849 | break; |
| 1850 | } |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1851 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | kfree_skb(skb); |
| 1853 | return 0; |
| 1854 | } |
| 1855 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1856 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 1857 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1858 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1861 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | { |
| 1863 | skb->dev = skb->dst->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1864 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | } |
| 1866 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1867 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 1868 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1869 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 1870 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1871 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1872 | } |
| 1873 | |
| 1874 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) |
| 1875 | { |
| 1876 | skb->dev = skb->dst->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1877 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1878 | } |
| 1879 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1880 | #endif |
| 1881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | /* |
| 1883 | * Allocate a dst for local (unicast / anycast) address. |
| 1884 | */ |
| 1885 | |
| 1886 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 1887 | const struct in6_addr *addr, |
| 1888 | int anycast) |
| 1889 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1890 | struct net *net = dev_net(idev->dev); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 1891 | struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | |
| 1893 | if (rt == NULL) |
| 1894 | return ERR_PTR(-ENOMEM); |
| 1895 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1896 | dev_hold(net->loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | in6_dev_hold(idev); |
| 1898 | |
| 1899 | rt->u.dst.flags = DST_HOST; |
| 1900 | rt->u.dst.input = ip6_input; |
| 1901 | rt->u.dst.output = ip6_output; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1902 | rt->rt6i_dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | rt->rt6i_idev = idev; |
| 1904 | 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] | 1905 | 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] | 1906 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
| 1907 | rt->u.dst.obsolete = -1; |
| 1908 | |
| 1909 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 1910 | if (anycast) |
| 1911 | rt->rt6i_flags |= RTF_ANYCAST; |
| 1912 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | rt->rt6i_flags |= RTF_LOCAL; |
| 1914 | rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 1915 | if (rt->rt6i_nexthop == NULL) { |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1916 | dst_free(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | return ERR_PTR(-ENOMEM); |
| 1918 | } |
| 1919 | |
| 1920 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 1921 | rt->rt6i_dst.plen = 128; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1922 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | |
| 1924 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 1925 | |
| 1926 | return rt; |
| 1927 | } |
| 1928 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1929 | struct arg_dev_net { |
| 1930 | struct net_device *dev; |
| 1931 | struct net *net; |
| 1932 | }; |
| 1933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 1935 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1936 | struct net_device *dev = ((struct arg_dev_net *)arg)->dev; |
| 1937 | struct net *net = ((struct arg_dev_net *)arg)->net; |
| 1938 | |
| 1939 | if (((void *)rt->rt6i_dev == dev || dev == NULL) && |
| 1940 | rt != net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | RT6_TRACE("deleted by ifdown %p\n", rt); |
| 1942 | return -1; |
| 1943 | } |
| 1944 | return 0; |
| 1945 | } |
| 1946 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 1947 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1949 | struct arg_dev_net adn = { |
| 1950 | .dev = dev, |
| 1951 | .net = net, |
| 1952 | }; |
| 1953 | |
| 1954 | fib6_clean_all(net, fib6_ifdown, 0, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1955 | icmp6_clean_all(fib6_ifdown, &adn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | |
| 1958 | struct rt6_mtu_change_arg |
| 1959 | { |
| 1960 | struct net_device *dev; |
| 1961 | unsigned mtu; |
| 1962 | }; |
| 1963 | |
| 1964 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 1965 | { |
| 1966 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 1967 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1968 | struct net *net = dev_net(arg->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | |
| 1970 | /* In IPv6 pmtu discovery is not optional, |
| 1971 | so that RTAX_MTU lock cannot disable it. |
| 1972 | We still use this lock to block changes |
| 1973 | caused by addrconf/ndisc. |
| 1974 | */ |
| 1975 | |
| 1976 | idev = __in6_dev_get(arg->dev); |
| 1977 | if (idev == NULL) |
| 1978 | return 0; |
| 1979 | |
| 1980 | /* For administrative MTU increase, there is no way to discover |
| 1981 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 1982 | Since RFC 1981 doesn't include administrative MTU increase |
| 1983 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 1984 | */ |
| 1985 | /* |
| 1986 | If new MTU is less than route PMTU, this new MTU will be the |
| 1987 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 1988 | decreases; if new MTU is greater than route PMTU, and the |
| 1989 | old MTU is the lowest MTU in the path, update the route PMTU |
| 1990 | to reflect the increase. In this case if the other nodes' MTU |
| 1991 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 1992 | PMTU discouvery. |
| 1993 | */ |
| 1994 | if (rt->rt6i_dev == arg->dev && |
| 1995 | !dst_metric_locked(&rt->u.dst, RTAX_MTU) && |
Jim Paris | 2371779 | 2008-01-31 16:36:25 -0800 | [diff] [blame] | 1996 | (dst_mtu(&rt->u.dst) >= arg->mtu || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1997 | (dst_mtu(&rt->u.dst) < arg->mtu && |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 1998 | dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2000 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu); |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2001 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | return 0; |
| 2003 | } |
| 2004 | |
| 2005 | void rt6_mtu_change(struct net_device *dev, unsigned mtu) |
| 2006 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2007 | struct rt6_mtu_change_arg arg = { |
| 2008 | .dev = dev, |
| 2009 | .mtu = mtu, |
| 2010 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2012 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | } |
| 2014 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2015 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2016 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2017 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2018 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2019 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2020 | [RTA_METRICS] = { .type = NLA_NESTED }, |
| 2021 | }; |
| 2022 | |
| 2023 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2024 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2026 | struct rtmsg *rtm; |
| 2027 | struct nlattr *tb[RTA_MAX+1]; |
| 2028 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2030 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2031 | if (err < 0) |
| 2032 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2034 | err = -EINVAL; |
| 2035 | rtm = nlmsg_data(nlh); |
| 2036 | memset(cfg, 0, sizeof(*cfg)); |
| 2037 | |
| 2038 | cfg->fc_table = rtm->rtm_table; |
| 2039 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2040 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2041 | cfg->fc_flags = RTF_UP; |
| 2042 | cfg->fc_protocol = rtm->rtm_protocol; |
| 2043 | |
| 2044 | if (rtm->rtm_type == RTN_UNREACHABLE) |
| 2045 | cfg->fc_flags |= RTF_REJECT; |
| 2046 | |
| 2047 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; |
| 2048 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2049 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2050 | |
| 2051 | if (tb[RTA_GATEWAY]) { |
| 2052 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); |
| 2053 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2055 | |
| 2056 | if (tb[RTA_DST]) { |
| 2057 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2058 | |
| 2059 | if (nla_len(tb[RTA_DST]) < plen) |
| 2060 | goto errout; |
| 2061 | |
| 2062 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2064 | |
| 2065 | if (tb[RTA_SRC]) { |
| 2066 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2067 | |
| 2068 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2069 | goto errout; |
| 2070 | |
| 2071 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2073 | |
| 2074 | if (tb[RTA_OIF]) |
| 2075 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2076 | |
| 2077 | if (tb[RTA_PRIORITY]) |
| 2078 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2079 | |
| 2080 | if (tb[RTA_METRICS]) { |
| 2081 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2082 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2084 | |
| 2085 | if (tb[RTA_TABLE]) |
| 2086 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2087 | |
| 2088 | err = 0; |
| 2089 | errout: |
| 2090 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | } |
| 2092 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2093 | 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] | 2094 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2095 | struct fib6_config cfg; |
| 2096 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2098 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2099 | if (err < 0) |
| 2100 | return err; |
| 2101 | |
| 2102 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | } |
| 2104 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2105 | 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] | 2106 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2107 | struct fib6_config cfg; |
| 2108 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2110 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2111 | if (err < 0) |
| 2112 | return err; |
| 2113 | |
| 2114 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2117 | static inline size_t rt6_nlmsg_size(void) |
| 2118 | { |
| 2119 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2120 | + nla_total_size(16) /* RTA_SRC */ |
| 2121 | + nla_total_size(16) /* RTA_DST */ |
| 2122 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 2123 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 2124 | + nla_total_size(4) /* RTA_TABLE */ |
| 2125 | + nla_total_size(4) /* RTA_IIF */ |
| 2126 | + nla_total_size(4) /* RTA_OIF */ |
| 2127 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 2128 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2129 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
| 2130 | } |
| 2131 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2132 | static int rt6_fill_node(struct net *net, |
| 2133 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 2134 | struct in6_addr *dst, struct in6_addr *src, |
| 2135 | int iif, int type, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2136 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | { |
| 2138 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2139 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2140 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2141 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | |
| 2143 | if (prefix) { /* user wants prefix routes only */ |
| 2144 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 2145 | /* success since this is not a prefix route */ |
| 2146 | return 1; |
| 2147 | } |
| 2148 | } |
| 2149 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2150 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags); |
| 2151 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2152 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2153 | |
| 2154 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | rtm->rtm_family = AF_INET6; |
| 2156 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 2157 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 2158 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2159 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2160 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2161 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2162 | table = RT6_TABLE_UNSPEC; |
| 2163 | rtm->rtm_table = table; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2164 | NLA_PUT_U32(skb, RTA_TABLE, table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | if (rt->rt6i_flags&RTF_REJECT) |
| 2166 | rtm->rtm_type = RTN_UNREACHABLE; |
| 2167 | else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK)) |
| 2168 | rtm->rtm_type = RTN_LOCAL; |
| 2169 | else |
| 2170 | rtm->rtm_type = RTN_UNICAST; |
| 2171 | rtm->rtm_flags = 0; |
| 2172 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 2173 | rtm->rtm_protocol = rt->rt6i_protocol; |
| 2174 | if (rt->rt6i_flags&RTF_DYNAMIC) |
| 2175 | rtm->rtm_protocol = RTPROT_REDIRECT; |
| 2176 | else if (rt->rt6i_flags & RTF_ADDRCONF) |
| 2177 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 2178 | else if (rt->rt6i_flags&RTF_DEFAULT) |
| 2179 | rtm->rtm_protocol = RTPROT_RA; |
| 2180 | |
| 2181 | if (rt->rt6i_flags&RTF_CACHE) |
| 2182 | rtm->rtm_flags |= RTM_F_CLONED; |
| 2183 | |
| 2184 | if (dst) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2185 | NLA_PUT(skb, RTA_DST, 16, dst); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2186 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | } else if (rtm->rtm_dst_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2188 | NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | #ifdef CONFIG_IPV6_SUBTREES |
| 2190 | if (src) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2191 | NLA_PUT(skb, RTA_SRC, 16, src); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2192 | rtm->rtm_src_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | } else if (rtm->rtm_src_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2194 | NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2196 | if (iif) { |
| 2197 | #ifdef CONFIG_IPV6_MROUTE |
| 2198 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
| 2199 | int err = ip6mr_get_route(skb, rtm, nowait); |
| 2200 | if (err <= 0) { |
| 2201 | if (!nowait) { |
| 2202 | if (err == 0) |
| 2203 | return 0; |
| 2204 | goto nla_put_failure; |
| 2205 | } else { |
| 2206 | if (err == -EMSGSIZE) |
| 2207 | goto nla_put_failure; |
| 2208 | } |
| 2209 | } |
| 2210 | } else |
| 2211 | #endif |
| 2212 | NLA_PUT_U32(skb, RTA_IIF, iif); |
| 2213 | } else if (dst) { |
Brian Haley | 5e0115e | 2008-08-13 01:58:57 -0700 | [diff] [blame] | 2214 | struct inet6_dev *idev = ip6_dst_idev(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | struct in6_addr saddr_buf; |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2216 | if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 2217 | dst, 0, &saddr_buf) == 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2218 | NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2222 | goto nla_put_failure; |
| 2223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | if (rt->u.dst.neighbour) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2225 | NLA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key); |
| 2226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | if (rt->u.dst.dev) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2228 | NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex); |
| 2229 | |
| 2230 | NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric); |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2231 | |
YOSHIFUJI Hideaki | 36e3dea | 2008-05-13 02:52:55 +0900 | [diff] [blame] | 2232 | if (!(rt->rt6i_flags & RTF_EXPIRES)) |
| 2233 | expires = 0; |
| 2234 | else if (rt->rt6i_expires - jiffies < INT_MAX) |
| 2235 | expires = rt->rt6i_expires - jiffies; |
| 2236 | else |
| 2237 | expires = INT_MAX; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 2238 | |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2239 | if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0, |
| 2240 | expires, rt->u.dst.error) < 0) |
| 2241 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2243 | return nlmsg_end(skb, nlh); |
| 2244 | |
| 2245 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2246 | nlmsg_cancel(skb, nlh); |
| 2247 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | } |
| 2249 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 2250 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | { |
| 2252 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 2253 | int prefix; |
| 2254 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2255 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 2256 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 2258 | } else |
| 2259 | prefix = 0; |
| 2260 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2261 | return rt6_fill_node(arg->net, |
| 2262 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2264 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | } |
| 2266 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2267 | 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] | 2268 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2269 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2270 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2272 | struct sk_buff *skb; |
| 2273 | struct rtmsg *rtm; |
| 2274 | struct flowi fl; |
| 2275 | int err, iif = 0; |
| 2276 | |
| 2277 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2278 | if (err < 0) |
| 2279 | goto errout; |
| 2280 | |
| 2281 | err = -EINVAL; |
| 2282 | memset(&fl, 0, sizeof(fl)); |
| 2283 | |
| 2284 | if (tb[RTA_SRC]) { |
| 2285 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 2286 | goto errout; |
| 2287 | |
| 2288 | ipv6_addr_copy(&fl.fl6_src, nla_data(tb[RTA_SRC])); |
| 2289 | } |
| 2290 | |
| 2291 | if (tb[RTA_DST]) { |
| 2292 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 2293 | goto errout; |
| 2294 | |
| 2295 | ipv6_addr_copy(&fl.fl6_dst, nla_data(tb[RTA_DST])); |
| 2296 | } |
| 2297 | |
| 2298 | if (tb[RTA_IIF]) |
| 2299 | iif = nla_get_u32(tb[RTA_IIF]); |
| 2300 | |
| 2301 | if (tb[RTA_OIF]) |
| 2302 | fl.oif = nla_get_u32(tb[RTA_OIF]); |
| 2303 | |
| 2304 | if (iif) { |
| 2305 | struct net_device *dev; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2306 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2307 | if (!dev) { |
| 2308 | err = -ENODEV; |
| 2309 | goto errout; |
| 2310 | } |
| 2311 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | |
| 2313 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2314 | if (skb == NULL) { |
| 2315 | err = -ENOBUFS; |
| 2316 | goto errout; |
| 2317 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | |
| 2319 | /* Reserve room for dummy headers, this skb can pass |
| 2320 | through good chunk of routing engine. |
| 2321 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 2322 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 2324 | |
Daniel Lezcano | 8a3edd8 | 2008-03-07 11:14:16 -0800 | [diff] [blame] | 2325 | rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | skb->dst = &rt->u.dst; |
| 2327 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2328 | err = rt6_fill_node(net, skb, rt, &fl.fl6_dst, &fl.fl6_src, iif, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | RTM_NEWROUTE, NETLINK_CB(in_skb).pid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2330 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2332 | kfree_skb(skb); |
| 2333 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | } |
| 2335 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2336 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2337 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | } |
| 2340 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2341 | 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] | 2342 | { |
| 2343 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2344 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2345 | u32 seq; |
| 2346 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2348 | err = -ENOBUFS; |
| 2349 | seq = info->nlh != NULL ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2350 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2351 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2352 | if (skb == NULL) |
| 2353 | goto errout; |
| 2354 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2355 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2356 | event, info->pid, seq, 0, 0, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2357 | if (err < 0) { |
| 2358 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 2359 | WARN_ON(err == -EMSGSIZE); |
| 2360 | kfree_skb(skb); |
| 2361 | goto errout; |
| 2362 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2363 | err = rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE, |
| 2364 | info->nlh, gfp_any()); |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2365 | errout: |
| 2366 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2367 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | } |
| 2369 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2370 | static int ip6_route_dev_notify(struct notifier_block *this, |
| 2371 | unsigned long event, void *data) |
| 2372 | { |
| 2373 | struct net_device *dev = (struct net_device *)data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2374 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2375 | |
| 2376 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
| 2377 | net->ipv6.ip6_null_entry->u.dst.dev = dev; |
| 2378 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 2379 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2380 | net->ipv6.ip6_prohibit_entry->u.dst.dev = dev; |
| 2381 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
| 2382 | net->ipv6.ip6_blk_hole_entry->u.dst.dev = dev; |
| 2383 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 2384 | #endif |
| 2385 | } |
| 2386 | |
| 2387 | return NOTIFY_OK; |
| 2388 | } |
| 2389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | /* |
| 2391 | * /proc |
| 2392 | */ |
| 2393 | |
| 2394 | #ifdef CONFIG_PROC_FS |
| 2395 | |
| 2396 | #define RT6_INFO_LEN (32 + 4 + 32 + 4 + 32 + 40 + 5 + 1) |
| 2397 | |
| 2398 | struct rt6_proc_arg |
| 2399 | { |
| 2400 | char *buffer; |
| 2401 | int offset; |
| 2402 | int length; |
| 2403 | int skip; |
| 2404 | int len; |
| 2405 | }; |
| 2406 | |
| 2407 | static int rt6_info_route(struct rt6_info *rt, void *p_arg) |
| 2408 | { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2409 | struct seq_file *m = p_arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2411 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | |
| 2413 | #ifdef CONFIG_IPV6_SUBTREES |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2414 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | #else |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2416 | seq_puts(m, "00000000000000000000000000000000 00 "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | #endif |
| 2418 | |
| 2419 | if (rt->rt6i_nexthop) { |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2420 | seq_printf(m, "%pi6", rt->rt6i_nexthop->primary_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | } else { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2422 | seq_puts(m, "00000000000000000000000000000000"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | } |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2424 | seq_printf(m, " %08x %08x %08x %08x %8s\n", |
| 2425 | rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt), |
| 2426 | rt->u.dst.__use, rt->rt6i_flags, |
| 2427 | rt->rt6i_dev ? rt->rt6i_dev->name : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2428 | return 0; |
| 2429 | } |
| 2430 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2431 | static int ipv6_route_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | { |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2433 | struct net *net = (struct net *)m->private; |
| 2434 | fib6_clean_all(net, rt6_info_route, 0, m); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2435 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | } |
| 2437 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2438 | static int ipv6_route_open(struct inode *inode, struct file *file) |
| 2439 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2440 | return single_open_net(inode, file, ipv6_route_show); |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2441 | } |
| 2442 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2443 | static const struct file_operations ipv6_route_proc_fops = { |
| 2444 | .owner = THIS_MODULE, |
| 2445 | .open = ipv6_route_open, |
| 2446 | .read = seq_read, |
| 2447 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2448 | .release = single_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2449 | }; |
| 2450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 2452 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2453 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2455 | net->ipv6.rt6_stats->fib_nodes, |
| 2456 | net->ipv6.rt6_stats->fib_route_nodes, |
| 2457 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 2458 | net->ipv6.rt6_stats->fib_rt_entries, |
| 2459 | net->ipv6.rt6_stats->fib_rt_cache, |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2460 | atomic_read(&net->ipv6.ip6_dst_ops->entries), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2461 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | |
| 2463 | return 0; |
| 2464 | } |
| 2465 | |
| 2466 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 2467 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2468 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2469 | } |
| 2470 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2471 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | .owner = THIS_MODULE, |
| 2473 | .open = rt6_stats_seq_open, |
| 2474 | .read = seq_read, |
| 2475 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2476 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | }; |
| 2478 | #endif /* CONFIG_PROC_FS */ |
| 2479 | |
| 2480 | #ifdef CONFIG_SYSCTL |
| 2481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | static |
| 2483 | int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp, |
| 2484 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 2485 | { |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2486 | struct net *net = current->nsproxy->net_ns; |
| 2487 | int delay = net->ipv6.sysctl.flush_delay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | if (write) { |
| 2489 | proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2490 | fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | return 0; |
| 2492 | } else |
| 2493 | return -EINVAL; |
| 2494 | } |
| 2495 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2496 | ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2497 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2499 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 2501 | .mode = 0200, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2502 | .proc_handler = &ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | }, |
| 2504 | { |
| 2505 | .ctl_name = NET_IPV6_ROUTE_GC_THRESH, |
| 2506 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2507 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | .maxlen = sizeof(int), |
| 2509 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2510 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | }, |
| 2512 | { |
| 2513 | .ctl_name = NET_IPV6_ROUTE_MAX_SIZE, |
| 2514 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2515 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | .maxlen = sizeof(int), |
| 2517 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2518 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | }, |
| 2520 | { |
| 2521 | .ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL, |
| 2522 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2523 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | .maxlen = sizeof(int), |
| 2525 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2526 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | .strategy = &sysctl_jiffies, |
| 2528 | }, |
| 2529 | { |
| 2530 | .ctl_name = NET_IPV6_ROUTE_GC_TIMEOUT, |
| 2531 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2532 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | .maxlen = sizeof(int), |
| 2534 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2535 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | .strategy = &sysctl_jiffies, |
| 2537 | }, |
| 2538 | { |
| 2539 | .ctl_name = NET_IPV6_ROUTE_GC_INTERVAL, |
| 2540 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2541 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | .maxlen = sizeof(int), |
| 2543 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2544 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | .strategy = &sysctl_jiffies, |
| 2546 | }, |
| 2547 | { |
| 2548 | .ctl_name = NET_IPV6_ROUTE_GC_ELASTICITY, |
| 2549 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2550 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | .maxlen = sizeof(int), |
| 2552 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2553 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | .strategy = &sysctl_jiffies, |
| 2555 | }, |
| 2556 | { |
| 2557 | .ctl_name = NET_IPV6_ROUTE_MTU_EXPIRES, |
| 2558 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2559 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | .maxlen = sizeof(int), |
| 2561 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2562 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | .strategy = &sysctl_jiffies, |
| 2564 | }, |
| 2565 | { |
| 2566 | .ctl_name = NET_IPV6_ROUTE_MIN_ADVMSS, |
| 2567 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2568 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | .maxlen = sizeof(int), |
| 2570 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2571 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | .strategy = &sysctl_jiffies, |
| 2573 | }, |
| 2574 | { |
| 2575 | .ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS, |
| 2576 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2577 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | .maxlen = sizeof(int), |
| 2579 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2580 | .proc_handler = &proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | .strategy = &sysctl_ms_jiffies, |
| 2582 | }, |
| 2583 | { .ctl_name = 0 } |
| 2584 | }; |
| 2585 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2586 | struct ctl_table *ipv6_route_sysctl_init(struct net *net) |
| 2587 | { |
| 2588 | struct ctl_table *table; |
| 2589 | |
| 2590 | table = kmemdup(ipv6_route_table_template, |
| 2591 | sizeof(ipv6_route_table_template), |
| 2592 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2593 | |
| 2594 | if (table) { |
| 2595 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2596 | table[1].data = &net->ipv6.ip6_dst_ops->gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2597 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 2598 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 2599 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 2600 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 2601 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 2602 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 2603 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
| 2604 | } |
| 2605 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2606 | return table; |
| 2607 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | #endif |
| 2609 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2610 | static int ip6_route_net_init(struct net *net) |
| 2611 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 2612 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2613 | |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2614 | net->ipv6.ip6_dst_ops = kmemdup(&ip6_dst_ops_template, |
| 2615 | sizeof(*net->ipv6.ip6_dst_ops), |
| 2616 | GFP_KERNEL); |
| 2617 | if (!net->ipv6.ip6_dst_ops) |
| 2618 | goto out; |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2619 | net->ipv6.ip6_dst_ops->dst_net = hold_net(net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2620 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2621 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 2622 | sizeof(*net->ipv6.ip6_null_entry), |
| 2623 | GFP_KERNEL); |
| 2624 | if (!net->ipv6.ip6_null_entry) |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2625 | goto out_ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2626 | net->ipv6.ip6_null_entry->u.dst.path = |
| 2627 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2628 | 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] | 2629 | |
| 2630 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2631 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 2632 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 2633 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2634 | if (!net->ipv6.ip6_prohibit_entry) |
| 2635 | goto out_ip6_null_entry; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2636 | net->ipv6.ip6_prohibit_entry->u.dst.path = |
| 2637 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2638 | 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] | 2639 | |
| 2640 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 2641 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 2642 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2643 | if (!net->ipv6.ip6_blk_hole_entry) |
| 2644 | goto out_ip6_prohibit_entry; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2645 | net->ipv6.ip6_blk_hole_entry->u.dst.path = |
| 2646 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2647 | 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] | 2648 | #endif |
| 2649 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 2650 | net->ipv6.sysctl.flush_delay = 0; |
| 2651 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 2652 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 2653 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 2654 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 2655 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 2656 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 2657 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 2658 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2659 | #ifdef CONFIG_PROC_FS |
| 2660 | proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops); |
| 2661 | proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops); |
| 2662 | #endif |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 2663 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 2664 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2665 | ret = 0; |
| 2666 | out: |
| 2667 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2668 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2669 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2670 | out_ip6_prohibit_entry: |
| 2671 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2672 | out_ip6_null_entry: |
| 2673 | kfree(net->ipv6.ip6_null_entry); |
| 2674 | #endif |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2675 | out_ip6_dst_ops: |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2676 | release_net(net->ipv6.ip6_dst_ops->dst_net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2677 | kfree(net->ipv6.ip6_dst_ops); |
| 2678 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2679 | } |
| 2680 | |
| 2681 | static void ip6_route_net_exit(struct net *net) |
| 2682 | { |
| 2683 | #ifdef CONFIG_PROC_FS |
| 2684 | proc_net_remove(net, "ipv6_route"); |
| 2685 | proc_net_remove(net, "rt6_stats"); |
| 2686 | #endif |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2687 | kfree(net->ipv6.ip6_null_entry); |
| 2688 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2689 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2690 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 2691 | #endif |
Denis V. Lunev | 48115be | 2008-04-16 02:01:34 -0700 | [diff] [blame] | 2692 | release_net(net->ipv6.ip6_dst_ops->dst_net); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2693 | kfree(net->ipv6.ip6_dst_ops); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2694 | } |
| 2695 | |
| 2696 | static struct pernet_operations ip6_route_net_ops = { |
| 2697 | .init = ip6_route_net_init, |
| 2698 | .exit = ip6_route_net_exit, |
| 2699 | }; |
| 2700 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2701 | static struct notifier_block ip6_route_dev_notifier = { |
| 2702 | .notifier_call = ip6_route_dev_notify, |
| 2703 | .priority = 0, |
| 2704 | }; |
| 2705 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2706 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2708 | int ret; |
| 2709 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2710 | ret = -ENOMEM; |
| 2711 | ip6_dst_ops_template.kmem_cachep = |
| 2712 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 2713 | SLAB_HWCACHE_ALIGN, NULL); |
| 2714 | if (!ip6_dst_ops_template.kmem_cachep) |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2715 | goto out;; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 2716 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2717 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 2718 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2719 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2720 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 2721 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 2722 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2723 | /* Registering of the loopback is done before this portion of code, |
| 2724 | * the loopback reference in rt6_info will not be taken, do it |
| 2725 | * manually for init_net */ |
| 2726 | init_net.ipv6.ip6_null_entry->u.dst.dev = init_net.loopback_dev; |
| 2727 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2728 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2729 | init_net.ipv6.ip6_prohibit_entry->u.dst.dev = init_net.loopback_dev; |
| 2730 | init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2731 | init_net.ipv6.ip6_blk_hole_entry->u.dst.dev = init_net.loopback_dev; |
| 2732 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2733 | #endif |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2734 | ret = fib6_init(); |
| 2735 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2736 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2737 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2738 | ret = xfrm6_init(); |
| 2739 | if (ret) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2740 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 2741 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2742 | ret = fib6_rules_init(); |
| 2743 | if (ret) |
| 2744 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 2745 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2746 | ret = -ENOBUFS; |
| 2747 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL) || |
| 2748 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL) || |
| 2749 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL)) |
| 2750 | goto fib6_rules_init; |
| 2751 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2752 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2753 | if (ret) |
| 2754 | goto fib6_rules_init; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2755 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2756 | out: |
| 2757 | return ret; |
| 2758 | |
| 2759 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2760 | fib6_rules_cleanup(); |
| 2761 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2762 | xfrm6_fini(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2763 | out_fib6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2764 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2765 | out_register_subsys: |
| 2766 | unregister_pernet_subsys(&ip6_route_net_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2767 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2768 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2769 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | } |
| 2771 | |
| 2772 | void ip6_route_cleanup(void) |
| 2773 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2774 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 2775 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2778 | unregister_pernet_subsys(&ip6_route_net_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2779 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | } |