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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 43 | #include <linux/slab.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 44 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <net/snmp.h> |
| 46 | #include <net/ipv6.h> |
| 47 | #include <net/ip6_fib.h> |
| 48 | #include <net/ip6_route.h> |
| 49 | #include <net/ndisc.h> |
| 50 | #include <net/addrconf.h> |
| 51 | #include <net/tcp.h> |
| 52 | #include <linux/rtnetlink.h> |
| 53 | #include <net/dst.h> |
| 54 | #include <net/xfrm.h> |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 55 | #include <net/netevent.h> |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 56 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | #include <asm/uaccess.h> |
| 59 | |
| 60 | #ifdef CONFIG_SYSCTL |
| 61 | #include <linux/sysctl.h> |
| 62 | #endif |
| 63 | |
| 64 | /* Set to 3 to get tracing. */ |
| 65 | #define RT6_DEBUG 2 |
| 66 | |
| 67 | #if RT6_DEBUG >= 3 |
| 68 | #define RDBG(x) printk x |
| 69 | #define RT6_TRACE(x...) printk(KERN_DEBUG x) |
| 70 | #else |
| 71 | #define RDBG(x) |
| 72 | #define RT6_TRACE(x...) do { ; } while (0) |
| 73 | #endif |
| 74 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 75 | #define CLONE_OFFLINK_ROUTE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static struct rt6_info * ip6_rt_copy(struct rt6_info *ort); |
| 78 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie); |
| 79 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
| 80 | static void ip6_dst_destroy(struct dst_entry *); |
| 81 | static void ip6_dst_ifdown(struct dst_entry *, |
| 82 | struct net_device *dev, int how); |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 83 | static int ip6_dst_gc(struct dst_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | static int ip6_pkt_discard(struct sk_buff *skb); |
| 86 | static int ip6_pkt_discard_out(struct sk_buff *skb); |
| 87 | static void ip6_link_failure(struct sk_buff *skb); |
| 88 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu); |
| 89 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 90 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 91 | static struct rt6_info *rt6_add_route_info(struct net *net, |
| 92 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 93 | struct in6_addr *gwaddr, int ifindex, |
| 94 | unsigned pref); |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 95 | static struct rt6_info *rt6_get_route_info(struct net *net, |
| 96 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 97 | struct in6_addr *gwaddr, int ifindex); |
| 98 | #endif |
| 99 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 100 | static struct dst_ops ip6_dst_ops_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 102 | .protocol = cpu_to_be16(ETH_P_IPV6), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | .gc = ip6_dst_gc, |
| 104 | .gc_thresh = 1024, |
| 105 | .check = ip6_dst_check, |
| 106 | .destroy = ip6_dst_destroy, |
| 107 | .ifdown = ip6_dst_ifdown, |
| 108 | .negative_advice = ip6_negative_advice, |
| 109 | .link_failure = ip6_link_failure, |
| 110 | .update_pmtu = ip6_rt_update_pmtu, |
Herbert Xu | 1ac06e0 | 2008-05-20 14:32:14 -0700 | [diff] [blame] | 111 | .local_out = __ip6_local_out, |
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, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 121 | .protocol = cpu_to_be16(ETH_P_IPV6), |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 122 | .destroy = ip6_dst_destroy, |
| 123 | .check = ip6_dst_check, |
| 124 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
Eric Dumazet | e242297 | 2008-01-30 20:07:45 -0800 | [diff] [blame] | 125 | .entries = ATOMIC_INIT(0), |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 126 | }; |
| 127 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 128 | static struct rt6_info ip6_null_entry_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | .u = { |
| 130 | .dst = { |
| 131 | .__refcnt = ATOMIC_INIT(1), |
| 132 | .__use = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | .obsolete = -1, |
| 134 | .error = -ENETUNREACH, |
| 135 | .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, |
| 136 | .input = ip6_pkt_discard, |
| 137 | .output = ip6_pkt_discard_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | }, |
| 140 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 141 | .rt6i_protocol = RTPROT_KERNEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 164 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 165 | .rt6i_metric = ~(u32) 0, |
| 166 | .rt6i_ref = ATOMIC_INIT(1), |
| 167 | }; |
| 168 | |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 169 | static struct rt6_info ip6_blk_hole_entry_template = { |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 170 | .u = { |
| 171 | .dst = { |
| 172 | .__refcnt = ATOMIC_INIT(1), |
| 173 | .__use = 1, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 174 | .obsolete = -1, |
| 175 | .error = -EINVAL, |
| 176 | .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 177 | .input = dst_discard, |
| 178 | .output = dst_discard, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 179 | } |
| 180 | }, |
| 181 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), |
Jean-Mickael Guerin | 4f72427 | 2009-05-20 17:38:59 -0700 | [diff] [blame] | 182 | .rt6i_protocol = RTPROT_KERNEL, |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 183 | .rt6i_metric = ~(u32) 0, |
| 184 | .rt6i_ref = ATOMIC_INIT(1), |
| 185 | }; |
| 186 | |
| 187 | #endif |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* allocate dst with ip6_dst_ops */ |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 190 | static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 192 | return (struct rt6_info *)dst_alloc(ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | static void ip6_dst_destroy(struct dst_entry *dst) |
| 196 | { |
| 197 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 198 | struct inet6_dev *idev = rt->rt6i_idev; |
| 199 | |
| 200 | if (idev != NULL) { |
| 201 | rt->rt6i_idev = NULL; |
| 202 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 203 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 207 | int how) |
| 208 | { |
| 209 | struct rt6_info *rt = (struct rt6_info *)dst; |
| 210 | struct inet6_dev *idev = rt->rt6i_idev; |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 211 | struct net_device *loopback_dev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 212 | dev_net(dev)->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 214 | if (dev != loopback_dev && idev != NULL && idev->dev == dev) { |
| 215 | struct inet6_dev *loopback_idev = |
| 216 | in6_dev_get(loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | if (loopback_idev != NULL) { |
| 218 | rt->rt6i_idev = loopback_idev; |
| 219 | in6_dev_put(idev); |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | static __inline__ int rt6_check_expired(const struct rt6_info *rt) |
| 225 | { |
| 226 | return (rt->rt6i_flags & RTF_EXPIRES && |
| 227 | time_after(jiffies, rt->rt6i_expires)); |
| 228 | } |
| 229 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 230 | static inline int rt6_need_strict(struct in6_addr *daddr) |
| 231 | { |
| 232 | return (ipv6_addr_type(daddr) & |
YOSHIFUJI Hideaki | 5ce83af | 2008-06-25 16:58:17 +0900 | [diff] [blame] | 233 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 234 | } |
| 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 237 | * Route lookup. Any table->tb6_lock is implied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | */ |
| 239 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 240 | static inline struct rt6_info *rt6_device_match(struct net *net, |
| 241 | struct rt6_info *rt, |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 242 | struct in6_addr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | int oif, |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 244 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
| 246 | struct rt6_info *local = NULL; |
| 247 | struct rt6_info *sprt; |
| 248 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 249 | if (!oif && ipv6_addr_any(saddr)) |
| 250 | goto out; |
| 251 | |
| 252 | for (sprt = rt; sprt; sprt = sprt->u.dst.rt6_next) { |
| 253 | struct net_device *dev = sprt->rt6i_dev; |
| 254 | |
| 255 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | if (dev->ifindex == oif) |
| 257 | return sprt; |
| 258 | if (dev->flags & IFF_LOOPBACK) { |
| 259 | if (sprt->rt6i_idev == NULL || |
| 260 | sprt->rt6i_idev->dev->ifindex != oif) { |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 261 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | continue; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 263 | if (local && (!oif || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | local->rt6i_idev->dev->ifindex == oif)) |
| 265 | continue; |
| 266 | } |
| 267 | local = sprt; |
| 268 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 269 | } else { |
| 270 | if (ipv6_chk_addr(net, saddr, dev, |
| 271 | flags & RT6_LOOKUP_F_IFACE)) |
| 272 | return sprt; |
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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 276 | if (oif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | if (local) |
| 278 | return local; |
| 279 | |
YOSHIFUJI Hideaki | d420895 | 2008-06-27 20:14:54 -0700 | [diff] [blame] | 280 | if (flags & RT6_LOOKUP_F_IFACE) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 281 | return net->ipv6.ip6_null_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 283 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | return rt; |
| 285 | } |
| 286 | |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 287 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 288 | static void rt6_probe(struct rt6_info *rt) |
| 289 | { |
| 290 | struct neighbour *neigh = rt ? rt->rt6i_nexthop : NULL; |
| 291 | /* |
| 292 | * Okay, this does not seem to be appropriate |
| 293 | * for now, however, we need to check if it |
| 294 | * is really so; aka Router Reachability Probing. |
| 295 | * |
| 296 | * Router Reachability Probe MUST be rate-limited |
| 297 | * to no more than one per minute. |
| 298 | */ |
| 299 | if (!neigh || (neigh->nud_state & NUD_VALID)) |
| 300 | return; |
| 301 | read_lock_bh(&neigh->lock); |
| 302 | if (!(neigh->nud_state & NUD_VALID) && |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 303 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 304 | struct in6_addr mcaddr; |
| 305 | struct in6_addr *target; |
| 306 | |
| 307 | neigh->updated = jiffies; |
| 308 | read_unlock_bh(&neigh->lock); |
| 309 | |
| 310 | target = (struct in6_addr *)&neigh->primary_key; |
| 311 | addrconf_addr_solict_mult(target, &mcaddr); |
| 312 | ndisc_send_ns(rt->rt6i_dev, NULL, target, &mcaddr, NULL); |
| 313 | } else |
| 314 | read_unlock_bh(&neigh->lock); |
| 315 | } |
| 316 | #else |
| 317 | static inline void rt6_probe(struct rt6_info *rt) |
| 318 | { |
YOSHIFUJI Hideaki | 2709725 | 2006-03-20 17:05:13 -0800 | [diff] [blame] | 319 | } |
| 320 | #endif |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | /* |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 323 | * Default Router Selection (RFC 2461 6.3.6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 325 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 327 | struct net_device *dev = rt->rt6i_dev; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 328 | if (!oif || dev->ifindex == oif) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 329 | return 2; |
David S. Miller | 161980f | 2007-04-06 11:42:27 -0700 | [diff] [blame] | 330 | if ((dev->flags & IFF_LOOPBACK) && |
| 331 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) |
| 332 | return 1; |
| 333 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | } |
| 335 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 336 | static inline int rt6_check_neigh(struct rt6_info *rt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 338 | struct neighbour *neigh = rt->rt6i_nexthop; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 339 | int m; |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 340 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
| 341 | !(rt->rt6i_flags & RTF_GATEWAY)) |
| 342 | m = 1; |
| 343 | else if (neigh) { |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 344 | read_lock_bh(&neigh->lock); |
| 345 | if (neigh->nud_state & NUD_VALID) |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 346 | m = 2; |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 347 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 348 | else if (neigh->nud_state & NUD_FAILED) |
| 349 | m = 0; |
| 350 | #endif |
| 351 | else |
YOSHIFUJI Hideaki | ea73ee2 | 2006-11-06 09:45:44 -0800 | [diff] [blame] | 352 | m = 1; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 353 | read_unlock_bh(&neigh->lock); |
YOSHIFUJI Hideaki | 398bcbe | 2008-01-19 00:35:16 -0800 | [diff] [blame] | 354 | } else |
| 355 | m = 0; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 356 | return m; |
| 357 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 359 | static int rt6_score_route(struct rt6_info *rt, int oif, |
| 360 | int strict) |
| 361 | { |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 362 | int m, n; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 363 | |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 364 | m = rt6_check_dev(rt, oif); |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 365 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 366 | return -1; |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 367 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 368 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; |
| 369 | #endif |
YOSHIFUJI Hideaki | 4d0c591 | 2006-05-26 13:23:41 -0700 | [diff] [blame] | 370 | n = rt6_check_neigh(rt); |
YOSHIFUJI Hideaki | 557e92e | 2006-11-06 09:45:45 -0800 | [diff] [blame] | 371 | if (!n && (strict & RT6_LOOKUP_F_REACHABLE)) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 372 | return -1; |
| 373 | return m; |
| 374 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 376 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
| 377 | int *mpri, struct rt6_info *match) |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 378 | { |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 379 | int m; |
| 380 | |
| 381 | if (rt6_check_expired(rt)) |
| 382 | goto out; |
| 383 | |
| 384 | m = rt6_score_route(rt, oif, strict); |
| 385 | if (m < 0) |
| 386 | goto out; |
| 387 | |
| 388 | if (m > *mpri) { |
| 389 | if (strict & RT6_LOOKUP_F_REACHABLE) |
| 390 | rt6_probe(match); |
| 391 | *mpri = m; |
| 392 | match = rt; |
| 393 | } else if (strict & RT6_LOOKUP_F_REACHABLE) { |
| 394 | rt6_probe(rt); |
| 395 | } |
| 396 | |
| 397 | out: |
| 398 | return match; |
| 399 | } |
| 400 | |
| 401 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, |
| 402 | struct rt6_info *rr_head, |
| 403 | u32 metric, int oif, int strict) |
| 404 | { |
| 405 | struct rt6_info *rt, *match; |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 406 | int mpri = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 408 | match = NULL; |
| 409 | for (rt = rr_head; rt && rt->rt6i_metric == metric; |
| 410 | rt = rt->u.dst.rt6_next) |
| 411 | match = find_match(rt, oif, strict, &mpri, match); |
| 412 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; |
| 413 | rt = rt->u.dst.rt6_next) |
| 414 | match = find_match(rt, oif, strict, &mpri, match); |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 415 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 416 | return match; |
| 417 | } |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 418 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 419 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
| 420 | { |
| 421 | struct rt6_info *match, *rt0; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 422 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 424 | RT6_TRACE("%s(fn->leaf=%p, oif=%d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 425 | __func__, fn->leaf, oif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 427 | rt0 = fn->rr_ptr; |
| 428 | if (!rt0) |
| 429 | fn->rr_ptr = rt0 = fn->leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 431 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 433 | if (!match && |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 434 | (strict & RT6_LOOKUP_F_REACHABLE)) { |
| 435 | struct rt6_info *next = rt0->u.dst.rt6_next; |
| 436 | |
YOSHIFUJI Hideaki | 554cfb7 | 2006-03-20 17:00:26 -0800 | [diff] [blame] | 437 | /* no entries matched; do round-robin */ |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 438 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
| 439 | next = fn->leaf; |
| 440 | |
| 441 | if (next != rt0) |
| 442 | fn->rr_ptr = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
| 444 | |
David S. Miller | f11e665 | 2007-03-24 20:36:25 -0700 | [diff] [blame] | 445 | RT6_TRACE("%s() => %p\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 446 | __func__, match); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 448 | net = dev_net(rt0->rt6i_dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 449 | return (match ? match : net->ipv6.ip6_null_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 452 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 453 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
| 454 | struct in6_addr *gwaddr) |
| 455 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 456 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 457 | struct route_info *rinfo = (struct route_info *) opt; |
| 458 | struct in6_addr prefix_buf, *prefix; |
| 459 | unsigned int pref; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 460 | unsigned long lifetime; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 461 | struct rt6_info *rt; |
| 462 | |
| 463 | if (len < sizeof(struct route_info)) { |
| 464 | return -EINVAL; |
| 465 | } |
| 466 | |
| 467 | /* Sanity check for prefix_len and length */ |
| 468 | if (rinfo->length > 3) { |
| 469 | return -EINVAL; |
| 470 | } else if (rinfo->prefix_len > 128) { |
| 471 | return -EINVAL; |
| 472 | } else if (rinfo->prefix_len > 64) { |
| 473 | if (rinfo->length < 2) { |
| 474 | return -EINVAL; |
| 475 | } |
| 476 | } else if (rinfo->prefix_len > 0) { |
| 477 | if (rinfo->length < 1) { |
| 478 | return -EINVAL; |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | pref = rinfo->route_pref; |
| 483 | if (pref == ICMPV6_ROUTER_PREF_INVALID) |
Jens Rosenboom | 3933fc9 | 2009-09-10 06:25:11 +0000 | [diff] [blame] | 484 | return -EINVAL; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 485 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 486 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 487 | |
| 488 | if (rinfo->length == 3) |
| 489 | prefix = (struct in6_addr *)rinfo->prefix; |
| 490 | else { |
| 491 | /* this function is safe */ |
| 492 | ipv6_addr_prefix(&prefix_buf, |
| 493 | (struct in6_addr *)rinfo->prefix, |
| 494 | rinfo->prefix_len); |
| 495 | prefix = &prefix_buf; |
| 496 | } |
| 497 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 498 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr, |
| 499 | dev->ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 500 | |
| 501 | if (rt && !lifetime) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 502 | ip6_del_rt(rt); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 503 | rt = NULL; |
| 504 | } |
| 505 | |
| 506 | if (!rt && lifetime) |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 507 | 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] | 508 | pref); |
| 509 | else if (rt) |
| 510 | rt->rt6i_flags = RTF_ROUTEINFO | |
| 511 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); |
| 512 | |
| 513 | if (rt) { |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 514 | if (!addrconf_finite_timeout(lifetime)) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 515 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 516 | } else { |
| 517 | rt->rt6i_expires = jiffies + HZ * lifetime; |
| 518 | rt->rt6i_flags |= RTF_EXPIRES; |
| 519 | } |
| 520 | dst_release(&rt->u.dst); |
| 521 | } |
| 522 | return 0; |
| 523 | } |
| 524 | #endif |
| 525 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 526 | #define BACKTRACK(__net, saddr) \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 527 | do { \ |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 528 | if (rt == __net->ipv6.ip6_null_entry) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 529 | struct fib6_node *pn; \ |
Ville Nuorvala | e0eda7b | 2006-10-16 22:11:11 -0700 | [diff] [blame] | 530 | while (1) { \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 531 | if (fn->fn_flags & RTN_TL_ROOT) \ |
| 532 | goto out; \ |
| 533 | pn = fn->parent; \ |
| 534 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ |
Kim Nordlund | 8bce65b | 2006-12-13 16:38:29 -0800 | [diff] [blame] | 535 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 536 | else \ |
| 537 | fn = pn; \ |
| 538 | if (fn->fn_flags & RTN_RTINFO) \ |
| 539 | goto restart; \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 540 | } \ |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 541 | } \ |
YOSHIFUJI Hideaki | 982f56f | 2006-08-23 17:22:39 -0700 | [diff] [blame] | 542 | } while(0) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 543 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 544 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
| 545 | struct fib6_table *table, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 546 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
| 548 | struct fib6_node *fn; |
| 549 | struct rt6_info *rt; |
| 550 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 551 | read_lock_bh(&table->tb6_lock); |
| 552 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
| 553 | restart: |
| 554 | rt = fn->leaf; |
YOSHIFUJI Hideaki | dd3abc4 | 2008-07-02 18:30:18 +0900 | [diff] [blame] | 555 | rt = rt6_device_match(net, rt, &fl->fl6_src, fl->oif, flags); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 556 | BACKTRACK(net, &fl->fl6_src); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 557 | out: |
Pavel Emelyanov | 03f49f3 | 2007-11-10 21:28:34 -0800 | [diff] [blame] | 558 | dst_use(&rt->u.dst, jiffies); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 559 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 560 | return rt; |
| 561 | |
| 562 | } |
| 563 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 564 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
| 565 | const struct in6_addr *saddr, int oif, int strict) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 566 | { |
| 567 | struct flowi fl = { |
| 568 | .oif = oif, |
| 569 | .nl_u = { |
| 570 | .ip6_u = { |
| 571 | .daddr = *daddr, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 572 | }, |
| 573 | }, |
| 574 | }; |
| 575 | struct dst_entry *dst; |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 576 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 577 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 578 | if (saddr) { |
| 579 | memcpy(&fl.fl6_src, saddr, sizeof(*saddr)); |
| 580 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
| 581 | } |
| 582 | |
Daniel Lezcano | 606a2b4 | 2008-03-04 13:45:59 -0800 | [diff] [blame] | 583 | dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_lookup); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 584 | if (dst->error == 0) |
| 585 | return (struct rt6_info *) dst; |
| 586 | |
| 587 | dst_release(dst); |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | return NULL; |
| 590 | } |
| 591 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 592 | EXPORT_SYMBOL(rt6_lookup); |
| 593 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 594 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | It takes new route entry, the addition fails by any reason the |
| 596 | route is freed. In any case, if caller does not hold it, it may |
| 597 | be destroyed. |
| 598 | */ |
| 599 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 600 | 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] | 601 | { |
| 602 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 603 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 605 | table = rt->rt6i_table; |
| 606 | write_lock_bh(&table->tb6_lock); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 607 | err = fib6_add(&table->tb6_root, rt, info); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 608 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | return err; |
| 611 | } |
| 612 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 613 | int ip6_ins_rt(struct rt6_info *rt) |
| 614 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 615 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 616 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 617 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 618 | return __ip6_ins_rt(rt, &info); |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 619 | } |
| 620 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 621 | static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr, |
| 622 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | struct rt6_info *rt; |
| 625 | |
| 626 | /* |
| 627 | * Clone the route. |
| 628 | */ |
| 629 | |
| 630 | rt = ip6_rt_copy(ort); |
| 631 | |
| 632 | if (rt) { |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 633 | struct neighbour *neigh; |
| 634 | int attempts = !in_softirq(); |
| 635 | |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 636 | if (!(rt->rt6i_flags&RTF_GATEWAY)) { |
| 637 | if (rt->rt6i_dst.plen != 128 && |
| 638 | ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)) |
| 639 | rt->rt6i_flags |= RTF_ANYCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | ipv6_addr_copy(&rt->rt6i_gateway, daddr); |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 641 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 643 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | rt->rt6i_dst.plen = 128; |
| 645 | rt->rt6i_flags |= RTF_CACHE; |
| 646 | rt->u.dst.flags |= DST_HOST; |
| 647 | |
| 648 | #ifdef CONFIG_IPV6_SUBTREES |
| 649 | if (rt->rt6i_src.plen && saddr) { |
| 650 | ipv6_addr_copy(&rt->rt6i_src.addr, saddr); |
| 651 | rt->rt6i_src.plen = 128; |
| 652 | } |
| 653 | #endif |
| 654 | |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 655 | retry: |
| 656 | neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 657 | if (IS_ERR(neigh)) { |
| 658 | struct net *net = dev_net(rt->rt6i_dev); |
| 659 | int saved_rt_min_interval = |
| 660 | net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 661 | int saved_rt_elasticity = |
| 662 | net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 663 | |
| 664 | if (attempts-- > 0) { |
| 665 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 1; |
| 666 | net->ipv6.sysctl.ip6_rt_gc_min_interval = 0; |
| 667 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 668 | ip6_dst_gc(&net->ipv6.ip6_dst_ops); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 669 | |
| 670 | net->ipv6.sysctl.ip6_rt_gc_elasticity = |
| 671 | saved_rt_elasticity; |
| 672 | net->ipv6.sysctl.ip6_rt_gc_min_interval = |
| 673 | saved_rt_min_interval; |
| 674 | goto retry; |
| 675 | } |
| 676 | |
| 677 | if (net_ratelimit()) |
| 678 | printk(KERN_WARNING |
| 679 | "Neighbour table overflow.\n"); |
| 680 | dst_free(&rt->u.dst); |
| 681 | return NULL; |
| 682 | } |
| 683 | rt->rt6i_nexthop = neigh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 685 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
YOSHIFUJI Hideaki | 95a9a5b | 2006-03-20 16:55:51 -0800 | [diff] [blame] | 687 | return rt; |
| 688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 690 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr) |
| 691 | { |
| 692 | struct rt6_info *rt = ip6_rt_copy(ort); |
| 693 | if (rt) { |
| 694 | ipv6_addr_copy(&rt->rt6i_dst.addr, daddr); |
| 695 | rt->rt6i_dst.plen = 128; |
| 696 | rt->rt6i_flags |= RTF_CACHE; |
YOSHIFUJI Hideaki | 299d993 | 2006-03-20 16:58:32 -0800 | [diff] [blame] | 697 | rt->u.dst.flags |= DST_HOST; |
| 698 | rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop); |
| 699 | } |
| 700 | return rt; |
| 701 | } |
| 702 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 703 | static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif, |
| 704 | struct flowi *fl, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | { |
| 706 | struct fib6_node *fn; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 707 | struct rt6_info *rt, *nrt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 708 | int strict = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | int attempts = 3; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 710 | int err; |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 711 | int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 713 | strict |= flags & RT6_LOOKUP_F_IFACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | relookup: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 716 | read_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 718 | restart_2: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 719 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
| 721 | restart: |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 722 | rt = rt6_select(fn, oif, strict | reachable); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 723 | |
| 724 | BACKTRACK(net, &fl->fl6_src); |
| 725 | if (rt == net->ipv6.ip6_null_entry || |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 726 | rt->rt6i_flags & RTF_CACHE) |
YOSHIFUJI Hideaki | 1ddef044 | 2006-03-20 17:01:24 -0800 | [diff] [blame] | 727 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 729 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 730 | read_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | fb9de91 | 2006-03-20 16:59:08 -0800 | [diff] [blame] | 731 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 732 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 733 | nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 734 | else { |
| 735 | #if CLONE_OFFLINK_ROUTE |
| 736 | nrt = rt6_alloc_clone(rt, &fl->fl6_dst); |
| 737 | #else |
| 738 | goto out2; |
| 739 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
YOSHIFUJI Hideaki | e40cf35 | 2006-03-20 16:59:27 -0800 | [diff] [blame] | 741 | |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 742 | dst_release(&rt->u.dst); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 743 | rt = nrt ? : net->ipv6.ip6_null_entry; |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 744 | |
| 745 | dst_hold(&rt->u.dst); |
| 746 | if (nrt) { |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 747 | err = ip6_ins_rt(nrt); |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 748 | if (!err) |
| 749 | goto out2; |
| 750 | } |
| 751 | |
| 752 | if (--attempts <= 0) |
| 753 | goto out2; |
| 754 | |
| 755 | /* |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 756 | * Race condition! In the gap, when table->tb6_lock was |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 757 | * released someone could insert this route. Relookup. |
| 758 | */ |
| 759 | dst_release(&rt->u.dst); |
| 760 | goto relookup; |
| 761 | |
| 762 | out: |
YOSHIFUJI Hideaki | 8238dd0 | 2006-03-20 17:04:35 -0800 | [diff] [blame] | 763 | if (reachable) { |
| 764 | reachable = 0; |
| 765 | goto restart_2; |
| 766 | } |
YOSHIFUJI Hideaki | 519fbd8 | 2006-03-20 17:00:05 -0800 | [diff] [blame] | 767 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 768 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | out2: |
| 770 | rt->u.dst.lastuse = jiffies; |
| 771 | rt->u.dst.__use++; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 772 | |
| 773 | return rt; |
| 774 | } |
| 775 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 776 | 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] | 777 | struct flowi *fl, int flags) |
| 778 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 779 | return ip6_pol_route(net, table, fl->iif, fl, flags); |
Pavel Emelyanov | 4acad72 | 2007-10-15 13:02:51 -0700 | [diff] [blame] | 780 | } |
| 781 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 782 | void ip6_route_input(struct sk_buff *skb) |
| 783 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 784 | struct ipv6hdr *iph = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 785 | struct net *net = dev_net(skb->dev); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 786 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 787 | struct flowi fl = { |
| 788 | .iif = skb->dev->ifindex, |
| 789 | .nl_u = { |
| 790 | .ip6_u = { |
| 791 | .daddr = iph->daddr, |
| 792 | .saddr = iph->saddr, |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 793 | .flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 794 | }, |
| 795 | }, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 796 | .mark = skb->mark, |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 797 | .proto = iph->nexthdr, |
| 798 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 799 | |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 800 | if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG) |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 801 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 802 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 803 | skb_dst_set(skb, fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input)); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 806 | 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] | 807 | struct flowi *fl, int flags) |
| 808 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 809 | return ip6_pol_route(net, table, fl->oif, fl, flags); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 810 | } |
| 811 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 812 | struct dst_entry * ip6_route_output(struct net *net, struct sock *sk, |
| 813 | struct flowi *fl) |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 814 | { |
| 815 | int flags = 0; |
| 816 | |
Jiri Olsa | f4f914b | 2010-04-20 21:21:26 +0000 | [diff] [blame] | 817 | if (fl->oif || rt6_need_strict(&fl->fl6_dst)) |
YOSHIFUJI Hideaki | 77d16f4 | 2006-08-23 17:25:05 -0700 | [diff] [blame] | 818 | flags |= RT6_LOOKUP_F_IFACE; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 819 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 820 | if (!ipv6_addr_any(&fl->fl6_src)) |
| 821 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki / 吉藤英明 | 0c9a2ac | 2010-03-07 00:14:44 +0000 | [diff] [blame] | 822 | else if (sk) |
| 823 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 824 | |
Daniel Lezcano | 4591db4 | 2008-03-05 10:48:10 -0800 | [diff] [blame] | 825 | return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 828 | EXPORT_SYMBOL(ip6_route_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 830 | int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl) |
| 831 | { |
| 832 | struct rt6_info *ort = (struct rt6_info *) *dstp; |
| 833 | struct rt6_info *rt = (struct rt6_info *) |
| 834 | dst_alloc(&ip6_dst_blackhole_ops); |
| 835 | struct dst_entry *new = NULL; |
| 836 | |
| 837 | if (rt) { |
| 838 | new = &rt->u.dst; |
| 839 | |
| 840 | atomic_set(&new->__refcnt, 1); |
| 841 | new->__use = 1; |
Herbert Xu | 352e512 | 2007-11-13 21:34:06 -0800 | [diff] [blame] | 842 | new->input = dst_discard; |
| 843 | new->output = dst_discard; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 844 | |
| 845 | memcpy(new->metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32)); |
| 846 | new->dev = ort->u.dst.dev; |
| 847 | if (new->dev) |
| 848 | dev_hold(new->dev); |
| 849 | rt->rt6i_idev = ort->rt6i_idev; |
| 850 | if (rt->rt6i_idev) |
| 851 | in6_dev_hold(rt->rt6i_idev); |
| 852 | rt->rt6i_expires = 0; |
| 853 | |
| 854 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 855 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 856 | rt->rt6i_metric = 0; |
| 857 | |
| 858 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 859 | #ifdef CONFIG_IPV6_SUBTREES |
| 860 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 861 | #endif |
| 862 | |
| 863 | dst_free(new); |
| 864 | } |
| 865 | |
| 866 | dst_release(*dstp); |
| 867 | *dstp = new; |
| 868 | return (new ? 0 : -ENOMEM); |
| 869 | } |
| 870 | EXPORT_SYMBOL_GPL(ip6_dst_blackhole); |
| 871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | /* |
| 873 | * Destination cache support functions |
| 874 | */ |
| 875 | |
| 876 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) |
| 877 | { |
| 878 | struct rt6_info *rt; |
| 879 | |
| 880 | rt = (struct rt6_info *) dst; |
| 881 | |
Herbert Xu | 1041444 | 2010-03-18 23:00:22 +0000 | [diff] [blame] | 882 | if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | return dst; |
| 884 | |
| 885 | return NULL; |
| 886 | } |
| 887 | |
| 888 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) |
| 889 | { |
| 890 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 891 | |
| 892 | if (rt) { |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 893 | if (rt->rt6i_flags & RTF_CACHE) { |
| 894 | if (rt6_check_expired(rt)) { |
| 895 | ip6_del_rt(rt); |
| 896 | dst = NULL; |
| 897 | } |
| 898 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | dst_release(dst); |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 900 | dst = NULL; |
| 901 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
YOSHIFUJI Hideaki / 吉藤英明 | 54c1a85 | 2010-03-28 07:15:45 +0000 | [diff] [blame] | 903 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | static void ip6_link_failure(struct sk_buff *skb) |
| 907 | { |
| 908 | struct rt6_info *rt; |
| 909 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 910 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 912 | rt = (struct rt6_info *) skb_dst(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | if (rt) { |
| 914 | if (rt->rt6i_flags&RTF_CACHE) { |
| 915 | dst_set_expires(&rt->u.dst, 0); |
| 916 | rt->rt6i_flags |= RTF_EXPIRES; |
| 917 | } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) |
| 918 | rt->rt6i_node->fn_sernum = -1; |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu) |
| 923 | { |
| 924 | struct rt6_info *rt6 = (struct rt6_info*)dst; |
| 925 | |
| 926 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
| 927 | rt6->rt6i_flags |= RTF_MODIFIED; |
| 928 | if (mtu < IPV6_MIN_MTU) { |
| 929 | mtu = IPV6_MIN_MTU; |
| 930 | dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 931 | } |
| 932 | dst->metrics[RTAX_MTU-1] = mtu; |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 933 | call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } |
| 935 | } |
| 936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | static int ipv6_get_mtu(struct net_device *dev); |
| 938 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 939 | static inline unsigned int ipv6_advmss(struct net *net, unsigned int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
| 941 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
| 942 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 943 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
| 944 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 947 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
| 948 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. |
| 949 | * IPV6_MAXPLEN is also valid and means: "any MSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | * rely only on pmtu discovery" |
| 951 | */ |
| 952 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) |
| 953 | mtu = IPV6_MAXPLEN; |
| 954 | return mtu; |
| 955 | } |
| 956 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 957 | static struct dst_entry *icmp6_dst_gc_list; |
| 958 | static DEFINE_SPINLOCK(icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 959 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 960 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | struct neighbour *neigh, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 962 | const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | { |
| 964 | struct rt6_info *rt; |
| 965 | struct inet6_dev *idev = in6_dev_get(dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 966 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
| 968 | if (unlikely(idev == NULL)) |
| 969 | return NULL; |
| 970 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 971 | rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (unlikely(rt == NULL)) { |
| 973 | in6_dev_put(idev); |
| 974 | goto out; |
| 975 | } |
| 976 | |
| 977 | dev_hold(dev); |
| 978 | if (neigh) |
| 979 | neigh_hold(neigh); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 980 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | neigh = ndisc_get_neigh(dev, addr); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 982 | if (IS_ERR(neigh)) |
| 983 | neigh = NULL; |
| 984 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | rt->rt6i_dev = dev; |
| 987 | rt->rt6i_idev = idev; |
| 988 | rt->rt6i_nexthop = neigh; |
| 989 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 990 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255; |
| 991 | 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] | 992 | 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] | 993 | rt->u.dst.output = ip6_output; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
| 995 | #if 0 /* there's no chance to use these for ndisc */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 996 | rt->u.dst.flags = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST |
| 997 | ? DST_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | : 0; |
| 999 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 1000 | rt->rt6i_dst.plen = 128; |
| 1001 | #endif |
| 1002 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1003 | spin_lock_bh(&icmp6_dst_lock); |
| 1004 | rt->u.dst.next = icmp6_dst_gc_list; |
| 1005 | icmp6_dst_gc_list = &rt->u.dst; |
| 1006 | spin_unlock_bh(&icmp6_dst_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1008 | fib6_force_start_gc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | out: |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1011 | return &rt->u.dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1014 | int icmp6_dst_gc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | { |
| 1016 | struct dst_entry *dst, *next, **pprev; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1017 | int more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | next = NULL; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1020 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1021 | spin_lock_bh(&icmp6_dst_lock); |
| 1022 | pprev = &icmp6_dst_gc_list; |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | while ((dst = *pprev) != NULL) { |
| 1025 | if (!atomic_read(&dst->__refcnt)) { |
| 1026 | *pprev = dst->next; |
| 1027 | dst_free(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } else { |
| 1029 | pprev = &dst->next; |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1030 | ++more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | } |
| 1033 | |
YOSHIFUJI Hideaki | 3b00944 | 2007-12-06 16:11:48 -0800 | [diff] [blame] | 1034 | spin_unlock_bh(&icmp6_dst_lock); |
Thomas Graf | 5d0bbee | 2006-08-04 03:37:36 -0700 | [diff] [blame] | 1035 | |
Stephen Hemminger | 3d0f24a | 2008-07-22 14:35:50 -0700 | [diff] [blame] | 1036 | return more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1039 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
| 1040 | void *arg) |
| 1041 | { |
| 1042 | struct dst_entry *dst, **pprev; |
| 1043 | |
| 1044 | spin_lock_bh(&icmp6_dst_lock); |
| 1045 | pprev = &icmp6_dst_gc_list; |
| 1046 | while ((dst = *pprev) != NULL) { |
| 1047 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 1048 | if (func(rt, arg)) { |
| 1049 | *pprev = dst->next; |
| 1050 | dst_free(dst); |
| 1051 | } else { |
| 1052 | pprev = &dst->next; |
| 1053 | } |
| 1054 | } |
| 1055 | spin_unlock_bh(&icmp6_dst_lock); |
| 1056 | } |
| 1057 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 1058 | static int ip6_dst_gc(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | unsigned long now = jiffies; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1061 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1062 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 1063 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; |
| 1064 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 1065 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 1066 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1068 | if (time_after(rt_last_gc + rt_min_interval, now) && |
| 1069 | atomic_read(&ops->entries) <= rt_max_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | goto out; |
| 1071 | |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 1072 | net->ipv6.ip6_rt_gc_expire++; |
| 1073 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net); |
| 1074 | net->ipv6.ip6_rt_last_gc = now; |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1075 | if (atomic_read(&ops->entries) < ops->gc_thresh) |
| 1076 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | out: |
Daniel Lezcano | 7019b78 | 2008-03-04 13:50:14 -0800 | [diff] [blame] | 1078 | net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity; |
| 1079 | return (atomic_read(&ops->entries) > rt_max_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | /* Clean host part of a prefix. Not necessary in radix tree, |
| 1083 | but results in cleaner routing tables. |
| 1084 | |
| 1085 | Remove it only when all the things will work! |
| 1086 | */ |
| 1087 | |
| 1088 | static int ipv6_get_mtu(struct net_device *dev) |
| 1089 | { |
| 1090 | int mtu = IPV6_MIN_MTU; |
| 1091 | struct inet6_dev *idev; |
| 1092 | |
| 1093 | idev = in6_dev_get(dev); |
| 1094 | if (idev) { |
| 1095 | mtu = idev->cnf.mtu6; |
| 1096 | in6_dev_put(idev); |
| 1097 | } |
| 1098 | return mtu; |
| 1099 | } |
| 1100 | |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1101 | int ip6_dst_hoplimit(struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | { |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1103 | int hoplimit = dst_metric(dst, RTAX_HOPLIMIT); |
| 1104 | if (hoplimit < 0) { |
| 1105 | struct net_device *dev = dst->dev; |
| 1106 | struct inet6_dev *idev = in6_dev_get(dev); |
| 1107 | if (idev) { |
| 1108 | hoplimit = idev->cnf.hop_limit; |
| 1109 | in6_dev_put(idev); |
| 1110 | } else |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1111 | hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | } |
| 1113 | return hoplimit; |
| 1114 | } |
| 1115 | |
| 1116 | /* |
| 1117 | * |
| 1118 | */ |
| 1119 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1120 | int ip6_route_add(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | { |
| 1122 | int err; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1123 | struct net *net = cfg->fc_nlinfo.nl_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | struct rt6_info *rt = NULL; |
| 1125 | struct net_device *dev = NULL; |
| 1126 | struct inet6_dev *idev = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1127 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | int addr_type; |
| 1129 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1130 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | return -EINVAL; |
| 1132 | #ifndef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1133 | if (cfg->fc_src_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | return -EINVAL; |
| 1135 | #endif |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1136 | if (cfg->fc_ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | err = -ENODEV; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1138 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | if (!dev) |
| 1140 | goto out; |
| 1141 | idev = in6_dev_get(dev); |
| 1142 | if (!idev) |
| 1143 | goto out; |
| 1144 | } |
| 1145 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1146 | if (cfg->fc_metric == 0) |
| 1147 | cfg->fc_metric = IP6_RT_PRIO_USER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1149 | table = fib6_new_table(net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1150 | if (table == NULL) { |
| 1151 | err = -ENOBUFS; |
| 1152 | goto out; |
| 1153 | } |
| 1154 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1155 | rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | |
| 1157 | if (rt == NULL) { |
| 1158 | err = -ENOMEM; |
| 1159 | goto out; |
| 1160 | } |
| 1161 | |
| 1162 | rt->u.dst.obsolete = -1; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1163 | rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ? |
| 1164 | jiffies + clock_t_to_jiffies(cfg->fc_expires) : |
| 1165 | 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1167 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
| 1168 | cfg->fc_protocol = RTPROT_BOOT; |
| 1169 | rt->rt6i_protocol = cfg->fc_protocol; |
| 1170 | |
| 1171 | addr_type = ipv6_addr_type(&cfg->fc_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | |
| 1173 | if (addr_type & IPV6_ADDR_MULTICAST) |
| 1174 | rt->u.dst.input = ip6_mc_input; |
| 1175 | else |
| 1176 | rt->u.dst.input = ip6_forward; |
| 1177 | |
| 1178 | rt->u.dst.output = ip6_output; |
| 1179 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1180 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
| 1181 | rt->rt6i_dst.plen = cfg->fc_dst_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | if (rt->rt6i_dst.plen == 128) |
| 1183 | rt->u.dst.flags = DST_HOST; |
| 1184 | |
| 1185 | #ifdef CONFIG_IPV6_SUBTREES |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1186 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
| 1187 | rt->rt6i_src.plen = cfg->fc_src_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | #endif |
| 1189 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1190 | rt->rt6i_metric = cfg->fc_metric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | /* We cannot add true routes via loopback here, |
| 1193 | they would result in kernel looping; promote them to reject routes |
| 1194 | */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1195 | if ((cfg->fc_flags & RTF_REJECT) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) { |
| 1197 | /* hold loopback dev/idev if we haven't done so. */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1198 | if (dev != net->loopback_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | if (dev) { |
| 1200 | dev_put(dev); |
| 1201 | in6_dev_put(idev); |
| 1202 | } |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1203 | dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | dev_hold(dev); |
| 1205 | idev = in6_dev_get(dev); |
| 1206 | if (!idev) { |
| 1207 | err = -ENODEV; |
| 1208 | goto out; |
| 1209 | } |
| 1210 | } |
| 1211 | rt->u.dst.output = ip6_pkt_discard_out; |
| 1212 | rt->u.dst.input = ip6_pkt_discard; |
| 1213 | rt->u.dst.error = -ENETUNREACH; |
| 1214 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
| 1215 | goto install_route; |
| 1216 | } |
| 1217 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1218 | if (cfg->fc_flags & RTF_GATEWAY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | struct in6_addr *gw_addr; |
| 1220 | int gwa_type; |
| 1221 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1222 | gw_addr = &cfg->fc_gateway; |
| 1223 | ipv6_addr_copy(&rt->rt6i_gateway, gw_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | gwa_type = ipv6_addr_type(gw_addr); |
| 1225 | |
| 1226 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { |
| 1227 | struct rt6_info *grt; |
| 1228 | |
| 1229 | /* IPv6 strictly inhibits using not link-local |
| 1230 | addresses as nexthop address. |
| 1231 | Otherwise, router will not able to send redirects. |
| 1232 | It is very good, but in some (rare!) circumstances |
| 1233 | (SIT, PtP, NBMA NOARP links) it is handy to allow |
| 1234 | some exceptions. --ANK |
| 1235 | */ |
| 1236 | err = -EINVAL; |
| 1237 | if (!(gwa_type&IPV6_ADDR_UNICAST)) |
| 1238 | goto out; |
| 1239 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1240 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
| 1242 | err = -EHOSTUNREACH; |
| 1243 | if (grt == NULL) |
| 1244 | goto out; |
| 1245 | if (dev) { |
| 1246 | if (dev != grt->rt6i_dev) { |
| 1247 | dst_release(&grt->u.dst); |
| 1248 | goto out; |
| 1249 | } |
| 1250 | } else { |
| 1251 | dev = grt->rt6i_dev; |
| 1252 | idev = grt->rt6i_idev; |
| 1253 | dev_hold(dev); |
| 1254 | in6_dev_hold(grt->rt6i_idev); |
| 1255 | } |
| 1256 | if (!(grt->rt6i_flags&RTF_GATEWAY)) |
| 1257 | err = 0; |
| 1258 | dst_release(&grt->u.dst); |
| 1259 | |
| 1260 | if (err) |
| 1261 | goto out; |
| 1262 | } |
| 1263 | err = -EINVAL; |
| 1264 | if (dev == NULL || (dev->flags&IFF_LOOPBACK)) |
| 1265 | goto out; |
| 1266 | } |
| 1267 | |
| 1268 | err = -ENODEV; |
| 1269 | if (dev == NULL) |
| 1270 | goto out; |
| 1271 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1272 | if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev); |
| 1274 | if (IS_ERR(rt->rt6i_nexthop)) { |
| 1275 | err = PTR_ERR(rt->rt6i_nexthop); |
| 1276 | rt->rt6i_nexthop = NULL; |
| 1277 | goto out; |
| 1278 | } |
| 1279 | } |
| 1280 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1281 | rt->rt6i_flags = cfg->fc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
| 1283 | install_route: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1284 | if (cfg->fc_mx) { |
| 1285 | struct nlattr *nla; |
| 1286 | int remaining; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1288 | 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] | 1289 | int type = nla_type(nla); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1290 | |
| 1291 | if (type) { |
| 1292 | if (type > RTAX_MAX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | err = -EINVAL; |
| 1294 | goto out; |
| 1295 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1296 | |
| 1297 | rt->u.dst.metrics[type - 1] = nla_get_u32(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | } |
| 1301 | |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1302 | if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
Rami Rosen | 1ca615f | 2008-08-06 02:34:21 -0700 | [diff] [blame] | 1304 | if (!dst_mtu(&rt->u.dst)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev); |
Satoru SATOH | 5ffc02a | 2008-05-04 22:14:42 -0700 | [diff] [blame] | 1306 | if (!dst_metric(&rt->u.dst, RTAX_ADVMSS)) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1307 | 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] | 1308 | rt->u.dst.dev = dev; |
| 1309 | rt->rt6i_idev = idev; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1310 | rt->rt6i_table = table; |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1311 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1312 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
Daniel Lezcano | 63152fc | 2008-03-03 23:31:11 -0800 | [diff] [blame] | 1313 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1314 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | |
| 1316 | out: |
| 1317 | if (dev) |
| 1318 | dev_put(dev); |
| 1319 | if (idev) |
| 1320 | in6_dev_put(idev); |
| 1321 | if (rt) |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1322 | dst_free(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | return err; |
| 1324 | } |
| 1325 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1326 | 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] | 1327 | { |
| 1328 | int err; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1329 | struct fib6_table *table; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1330 | struct net *net = dev_net(rt->rt6i_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1332 | if (rt == net->ipv6.ip6_null_entry) |
Patrick McHardy | 6c813a7 | 2006-08-06 22:22:47 -0700 | [diff] [blame] | 1333 | return -ENOENT; |
| 1334 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1335 | table = rt->rt6i_table; |
| 1336 | write_lock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1338 | err = fib6_del(rt, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | dst_release(&rt->u.dst); |
| 1340 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1341 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
| 1343 | return err; |
| 1344 | } |
| 1345 | |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1346 | int ip6_del_rt(struct rt6_info *rt) |
| 1347 | { |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1348 | struct nl_info info = { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1349 | .nl_net = dev_net(rt->rt6i_dev), |
Denis V. Lunev | 4d1169c | 2008-01-10 03:26:13 -0800 | [diff] [blame] | 1350 | }; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 1351 | return __ip6_del_rt(rt, &info); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1352 | } |
| 1353 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1354 | static int ip6_route_del(struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1356 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | struct fib6_node *fn; |
| 1358 | struct rt6_info *rt; |
| 1359 | int err = -ESRCH; |
| 1360 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1361 | table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1362 | if (table == NULL) |
| 1363 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1365 | read_lock_bh(&table->tb6_lock); |
| 1366 | |
| 1367 | fn = fib6_locate(&table->tb6_root, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1368 | &cfg->fc_dst, cfg->fc_dst_len, |
| 1369 | &cfg->fc_src, cfg->fc_src_len); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | if (fn) { |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1372 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1373 | if (cfg->fc_ifindex && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | (rt->rt6i_dev == NULL || |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1375 | rt->rt6i_dev->ifindex != cfg->fc_ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1377 | if (cfg->fc_flags & RTF_GATEWAY && |
| 1378 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | continue; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1380 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | continue; |
| 1382 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1383 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1385 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
| 1387 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1388 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
| 1390 | return err; |
| 1391 | } |
| 1392 | |
| 1393 | /* |
| 1394 | * Handle redirects |
| 1395 | */ |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1396 | struct ip6rd_flowi { |
| 1397 | struct flowi fl; |
| 1398 | struct in6_addr gateway; |
| 1399 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1401 | static struct rt6_info *__ip6_route_redirect(struct net *net, |
| 1402 | struct fib6_table *table, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1403 | struct flowi *fl, |
| 1404 | int flags) |
| 1405 | { |
| 1406 | struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl; |
| 1407 | struct rt6_info *rt; |
| 1408 | struct fib6_node *fn; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | /* |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1411 | * Get the "current" route for this destination and |
| 1412 | * check if the redirect has come from approriate router. |
| 1413 | * |
| 1414 | * RFC 2461 specifies that redirects should only be |
| 1415 | * accepted if they come from the nexthop to the target. |
| 1416 | * Due to the way the routes are chosen, this notion |
| 1417 | * is a bit fuzzy and one might need to check all possible |
| 1418 | * routes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1421 | read_lock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1422 | fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src); |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1423 | restart: |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1424 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1425 | /* |
| 1426 | * Current route is on-link; redirect is always invalid. |
| 1427 | * |
| 1428 | * Seems, previous statement is not true. It could |
| 1429 | * be node, which looks for us as on-link (f.e. proxy ndisc) |
| 1430 | * But then router serving it might decide, that we should |
| 1431 | * know truth 8)8) --ANK (980726). |
| 1432 | */ |
| 1433 | if (rt6_check_expired(rt)) |
| 1434 | continue; |
| 1435 | if (!(rt->rt6i_flags & RTF_GATEWAY)) |
| 1436 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1437 | if (fl->oif != rt->rt6i_dev->ifindex) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1438 | continue; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1439 | if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway)) |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1440 | continue; |
| 1441 | break; |
| 1442 | } |
YOSHIFUJI Hideaki | e843b9e | 2006-03-20 17:07:49 -0800 | [diff] [blame] | 1443 | |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1444 | if (!rt) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1445 | rt = net->ipv6.ip6_null_entry; |
| 1446 | BACKTRACK(net, &fl->fl6_src); |
YOSHIFUJI Hideaki | cb15d9c | 2006-08-23 17:23:11 -0700 | [diff] [blame] | 1447 | out: |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1448 | dst_hold(&rt->u.dst); |
| 1449 | |
| 1450 | read_unlock_bh(&table->tb6_lock); |
| 1451 | |
| 1452 | return rt; |
| 1453 | }; |
| 1454 | |
| 1455 | static struct rt6_info *ip6_route_redirect(struct in6_addr *dest, |
| 1456 | struct in6_addr *src, |
| 1457 | struct in6_addr *gateway, |
| 1458 | struct net_device *dev) |
| 1459 | { |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1460 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1461 | struct net *net = dev_net(dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1462 | struct ip6rd_flowi rdfl = { |
| 1463 | .fl = { |
| 1464 | .oif = dev->ifindex, |
| 1465 | .nl_u = { |
| 1466 | .ip6_u = { |
| 1467 | .daddr = *dest, |
| 1468 | .saddr = *src, |
| 1469 | }, |
| 1470 | }, |
| 1471 | }, |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1472 | }; |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1473 | |
Brian Haley | 86c36ce | 2009-10-07 13:58:01 -0700 | [diff] [blame] | 1474 | ipv6_addr_copy(&rdfl.gateway, gateway); |
| 1475 | |
Thomas Graf | adaa70b | 2006-10-13 15:01:03 -0700 | [diff] [blame] | 1476 | if (rt6_need_strict(dest)) |
| 1477 | flags |= RT6_LOOKUP_F_IFACE; |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1478 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1479 | return (struct rt6_info *)fib6_rule_lookup(net, (struct flowi *)&rdfl, |
Daniel Lezcano | 58f09b7 | 2008-03-03 23:25:27 -0800 | [diff] [blame] | 1480 | flags, __ip6_route_redirect); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | void rt6_redirect(struct in6_addr *dest, struct in6_addr *src, |
| 1484 | struct in6_addr *saddr, |
| 1485 | struct neighbour *neigh, u8 *lladdr, int on_link) |
| 1486 | { |
| 1487 | struct rt6_info *rt, *nrt = NULL; |
| 1488 | struct netevent_redirect netevent; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1489 | struct net *net = dev_net(neigh->dev); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1490 | |
| 1491 | rt = ip6_route_redirect(dest, src, saddr, neigh->dev); |
| 1492 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1493 | if (rt == net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | if (net_ratelimit()) |
| 1495 | printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop " |
| 1496 | "for redirect target\n"); |
YOSHIFUJI Hideaki | a627945 | 2006-08-23 17:18:26 -0700 | [diff] [blame] | 1497 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | } |
| 1499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | /* |
| 1501 | * We have finally decided to accept it. |
| 1502 | */ |
| 1503 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1504 | neigh_update(neigh, lladdr, NUD_STALE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
| 1506 | NEIGH_UPDATE_F_OVERRIDE| |
| 1507 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| |
| 1508 | NEIGH_UPDATE_F_ISROUTER)) |
| 1509 | ); |
| 1510 | |
| 1511 | /* |
| 1512 | * Redirect received -> path was valid. |
| 1513 | * Look, redirects are sent only in response to data packets, |
| 1514 | * so that this nexthop apparently is reachable. --ANK |
| 1515 | */ |
| 1516 | dst_confirm(&rt->u.dst); |
| 1517 | |
| 1518 | /* Duplicate redirect: silently ignore. */ |
| 1519 | if (neigh == rt->u.dst.neighbour) |
| 1520 | goto out; |
| 1521 | |
| 1522 | nrt = ip6_rt_copy(rt); |
| 1523 | if (nrt == NULL) |
| 1524 | goto out; |
| 1525 | |
| 1526 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; |
| 1527 | if (on_link) |
| 1528 | nrt->rt6i_flags &= ~RTF_GATEWAY; |
| 1529 | |
| 1530 | ipv6_addr_copy(&nrt->rt6i_dst.addr, dest); |
| 1531 | nrt->rt6i_dst.plen = 128; |
| 1532 | nrt->u.dst.flags |= DST_HOST; |
| 1533 | |
| 1534 | ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key); |
| 1535 | nrt->rt6i_nexthop = neigh_clone(neigh); |
| 1536 | /* Reset pmtu, it may be better */ |
| 1537 | nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1538 | 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] | 1539 | dst_mtu(&nrt->u.dst)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1541 | if (ip6_ins_rt(nrt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | goto out; |
| 1543 | |
Tom Tucker | 8d71740 | 2006-07-30 20:43:36 -0700 | [diff] [blame] | 1544 | netevent.old = &rt->u.dst; |
| 1545 | netevent.new = &nrt->u.dst; |
| 1546 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
| 1547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | if (rt->rt6i_flags&RTF_CACHE) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1549 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | return; |
| 1551 | } |
| 1552 | |
| 1553 | out: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1554 | dst_release(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | * Handle ICMP "packet too big" messages |
| 1559 | * i.e. Path MTU discovery |
| 1560 | */ |
| 1561 | |
| 1562 | void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr, |
| 1563 | struct net_device *dev, u32 pmtu) |
| 1564 | { |
| 1565 | struct rt6_info *rt, *nrt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1566 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | int allfrag = 0; |
| 1568 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1569 | rt = rt6_lookup(net, daddr, saddr, dev->ifindex, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | if (rt == NULL) |
| 1571 | return; |
| 1572 | |
| 1573 | if (pmtu >= dst_mtu(&rt->u.dst)) |
| 1574 | goto out; |
| 1575 | |
| 1576 | if (pmtu < IPV6_MIN_MTU) { |
| 1577 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1578 | * According to RFC2460, PMTU is set to the IPv6 Minimum Link |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | * MTU (1280) and a fragment header should always be included |
| 1580 | * after a node receiving Too Big message reporting PMTU is |
| 1581 | * less than the IPv6 Minimum Link MTU. |
| 1582 | */ |
| 1583 | pmtu = IPV6_MIN_MTU; |
| 1584 | allfrag = 1; |
| 1585 | } |
| 1586 | |
| 1587 | /* New mtu received -> path was valid. |
| 1588 | They are sent only in response to data packets, |
| 1589 | so that this nexthop apparently is reachable. --ANK |
| 1590 | */ |
| 1591 | dst_confirm(&rt->u.dst); |
| 1592 | |
| 1593 | /* Host route. If it is static, it would be better |
| 1594 | not to override it, but add new one, so that |
| 1595 | when cache entry will expire old pmtu |
| 1596 | would return automatically. |
| 1597 | */ |
| 1598 | if (rt->rt6i_flags & RTF_CACHE) { |
| 1599 | rt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1600 | if (allfrag) |
| 1601 | rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1602 | 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] | 1603 | rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES; |
| 1604 | goto out; |
| 1605 | } |
| 1606 | |
| 1607 | /* Network route. |
| 1608 | Two cases are possible: |
| 1609 | 1. It is connected route. Action: COW |
| 1610 | 2. It is gatewayed route or NONEXTHOP route. Action: clone it. |
| 1611 | */ |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1612 | if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1613 | nrt = rt6_alloc_cow(rt, daddr, saddr); |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1614 | else |
| 1615 | nrt = rt6_alloc_clone(rt, daddr); |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1616 | |
YOSHIFUJI Hideaki | d5315b5 | 2006-03-20 16:58:48 -0800 | [diff] [blame] | 1617 | if (nrt) { |
YOSHIFUJI Hideaki | a1e7836 | 2006-03-20 16:56:32 -0800 | [diff] [blame] | 1618 | nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; |
| 1619 | if (allfrag) |
| 1620 | nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; |
| 1621 | |
| 1622 | /* According to RFC 1981, detecting PMTU increase shouldn't be |
| 1623 | * happened within 5 mins, the recommended timer is 10 mins. |
| 1624 | * Here this route expiration time is set to ip6_rt_mtu_expires |
| 1625 | * which is 10 mins. After 10 mins the decreased pmtu is expired |
| 1626 | * and detecting PMTU increase will be automatically happened. |
| 1627 | */ |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1628 | 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] | 1629 | nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; |
| 1630 | |
Thomas Graf | 40e22e8 | 2006-08-22 00:00:45 -0700 | [diff] [blame] | 1631 | ip6_ins_rt(nrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | out: |
| 1634 | dst_release(&rt->u.dst); |
| 1635 | } |
| 1636 | |
| 1637 | /* |
| 1638 | * Misc support functions |
| 1639 | */ |
| 1640 | |
| 1641 | static struct rt6_info * ip6_rt_copy(struct rt6_info *ort) |
| 1642 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1643 | struct net *net = dev_net(ort->rt6i_dev); |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1644 | struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | |
| 1646 | if (rt) { |
| 1647 | rt->u.dst.input = ort->u.dst.input; |
| 1648 | rt->u.dst.output = ort->u.dst.output; |
| 1649 | |
| 1650 | 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] | 1651 | rt->u.dst.error = ort->u.dst.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | rt->u.dst.dev = ort->u.dst.dev; |
| 1653 | if (rt->u.dst.dev) |
| 1654 | dev_hold(rt->u.dst.dev); |
| 1655 | rt->rt6i_idev = ort->rt6i_idev; |
| 1656 | if (rt->rt6i_idev) |
| 1657 | in6_dev_hold(rt->rt6i_idev); |
| 1658 | rt->u.dst.lastuse = jiffies; |
| 1659 | rt->rt6i_expires = 0; |
| 1660 | |
| 1661 | ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway); |
| 1662 | rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES; |
| 1663 | rt->rt6i_metric = 0; |
| 1664 | |
| 1665 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); |
| 1666 | #ifdef CONFIG_IPV6_SUBTREES |
| 1667 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); |
| 1668 | #endif |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1669 | rt->rt6i_table = ort->rt6i_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | } |
| 1671 | return rt; |
| 1672 | } |
| 1673 | |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1674 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1675 | static struct rt6_info *rt6_get_route_info(struct net *net, |
| 1676 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1677 | struct in6_addr *gwaddr, int ifindex) |
| 1678 | { |
| 1679 | struct fib6_node *fn; |
| 1680 | struct rt6_info *rt = NULL; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1681 | struct fib6_table *table; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1682 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1683 | table = fib6_get_table(net, RT6_TABLE_INFO); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1684 | if (table == NULL) |
| 1685 | return NULL; |
| 1686 | |
| 1687 | write_lock_bh(&table->tb6_lock); |
| 1688 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1689 | if (!fn) |
| 1690 | goto out; |
| 1691 | |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1692 | for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) { |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1693 | if (rt->rt6i_dev->ifindex != ifindex) |
| 1694 | continue; |
| 1695 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) |
| 1696 | continue; |
| 1697 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) |
| 1698 | continue; |
| 1699 | dst_hold(&rt->u.dst); |
| 1700 | break; |
| 1701 | } |
| 1702 | out: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1703 | write_unlock_bh(&table->tb6_lock); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1704 | return rt; |
| 1705 | } |
| 1706 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1707 | static struct rt6_info *rt6_add_route_info(struct net *net, |
| 1708 | struct in6_addr *prefix, int prefixlen, |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1709 | struct in6_addr *gwaddr, int ifindex, |
| 1710 | unsigned pref) |
| 1711 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1712 | struct fib6_config cfg = { |
| 1713 | .fc_table = RT6_TABLE_INFO, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1714 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1715 | .fc_ifindex = ifindex, |
| 1716 | .fc_dst_len = prefixlen, |
| 1717 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | |
| 1718 | RTF_UP | RTF_PREF(pref), |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1719 | .fc_nlinfo.pid = 0, |
| 1720 | .fc_nlinfo.nlh = NULL, |
| 1721 | .fc_nlinfo.nl_net = net, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1722 | }; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1723 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1724 | ipv6_addr_copy(&cfg.fc_dst, prefix); |
| 1725 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
| 1726 | |
YOSHIFUJI Hideaki | e317da9 | 2006-03-20 17:06:42 -0800 | [diff] [blame] | 1727 | /* We should treat it as a default route if prefix length is 0. */ |
| 1728 | if (!prefixlen) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1729 | cfg.fc_flags |= RTF_DEFAULT; |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1730 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1731 | ip6_route_add(&cfg); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1732 | |
Daniel Lezcano | efa2cea | 2008-03-04 13:46:48 -0800 | [diff] [blame] | 1733 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
YOSHIFUJI Hideaki | 70ceb4f | 2006-03-20 17:06:24 -0800 | [diff] [blame] | 1734 | } |
| 1735 | #endif |
| 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | 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] | 1738 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1740 | struct fib6_table *table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1742 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1743 | if (table == NULL) |
| 1744 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1746 | write_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1747 | 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] | 1748 | if (dev == rt->rt6i_dev && |
YOSHIFUJI Hideaki | 045927f | 2006-03-20 17:00:48 -0800 | [diff] [blame] | 1749 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
| 1751 | break; |
| 1752 | } |
| 1753 | if (rt) |
| 1754 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1755 | write_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | return rt; |
| 1757 | } |
| 1758 | |
| 1759 | struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr, |
YOSHIFUJI Hideaki | ebacaaa | 2006-03-20 17:04:53 -0800 | [diff] [blame] | 1760 | struct net_device *dev, |
| 1761 | unsigned int pref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1763 | struct fib6_config cfg = { |
| 1764 | .fc_table = RT6_TABLE_DFLT, |
Rami Rosen | 238fc7e | 2008-02-09 23:43:11 -0800 | [diff] [blame] | 1765 | .fc_metric = IP6_RT_PRIO_USER, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1766 | .fc_ifindex = dev->ifindex, |
| 1767 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | |
| 1768 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1769 | .fc_nlinfo.pid = 0, |
| 1770 | .fc_nlinfo.nlh = NULL, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1771 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1772 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1774 | ipv6_addr_copy(&cfg.fc_gateway, gwaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1776 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | return rt6_get_dflt_router(gwaddr, dev); |
| 1779 | } |
| 1780 | |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1781 | void rt6_purge_dflt_routers(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | { |
| 1783 | struct rt6_info *rt; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1784 | struct fib6_table *table; |
| 1785 | |
| 1786 | /* NOTE: Keep consistent with rt6_get_dflt_router */ |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 1787 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1788 | if (table == NULL) |
| 1789 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | |
| 1791 | restart: |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1792 | read_lock_bh(&table->tb6_lock); |
Eric Dumazet | 7cc4826 | 2007-02-09 16:22:57 -0800 | [diff] [blame] | 1793 | 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] | 1794 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) { |
| 1795 | dst_hold(&rt->u.dst); |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1796 | read_unlock_bh(&table->tb6_lock); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1797 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | goto restart; |
| 1799 | } |
| 1800 | } |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 1801 | read_unlock_bh(&table->tb6_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | } |
| 1803 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1804 | static void rtmsg_to_fib6_config(struct net *net, |
| 1805 | struct in6_rtmsg *rtmsg, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1806 | struct fib6_config *cfg) |
| 1807 | { |
| 1808 | memset(cfg, 0, sizeof(*cfg)); |
| 1809 | |
| 1810 | cfg->fc_table = RT6_TABLE_MAIN; |
| 1811 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; |
| 1812 | cfg->fc_metric = rtmsg->rtmsg_metric; |
| 1813 | cfg->fc_expires = rtmsg->rtmsg_info; |
| 1814 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; |
| 1815 | cfg->fc_src_len = rtmsg->rtmsg_src_len; |
| 1816 | cfg->fc_flags = rtmsg->rtmsg_flags; |
| 1817 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1818 | cfg->fc_nlinfo.nl_net = net; |
Benjamin Thery | f1243c2 | 2008-02-26 18:10:03 -0800 | [diff] [blame] | 1819 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1820 | ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst); |
| 1821 | ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src); |
| 1822 | ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway); |
| 1823 | } |
| 1824 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1825 | 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] | 1826 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1827 | struct fib6_config cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | struct in6_rtmsg rtmsg; |
| 1829 | int err; |
| 1830 | |
| 1831 | switch(cmd) { |
| 1832 | case SIOCADDRT: /* Add a route */ |
| 1833 | case SIOCDELRT: /* Delete a route */ |
| 1834 | if (!capable(CAP_NET_ADMIN)) |
| 1835 | return -EPERM; |
| 1836 | err = copy_from_user(&rtmsg, arg, |
| 1837 | sizeof(struct in6_rtmsg)); |
| 1838 | if (err) |
| 1839 | return -EFAULT; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1840 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1841 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | rtnl_lock(); |
| 1844 | switch (cmd) { |
| 1845 | case SIOCADDRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1846 | err = ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | break; |
| 1848 | case SIOCDELRT: |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1849 | err = ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | break; |
| 1851 | default: |
| 1852 | err = -EINVAL; |
| 1853 | } |
| 1854 | rtnl_unlock(); |
| 1855 | |
| 1856 | return err; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1857 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | |
| 1859 | return -EINVAL; |
| 1860 | } |
| 1861 | |
| 1862 | /* |
| 1863 | * Drop the packet on the floor |
| 1864 | */ |
| 1865 | |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 1866 | static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1868 | int type; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1869 | struct dst_entry *dst = skb_dst(skb); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1870 | switch (ipstats_mib_noroutes) { |
| 1871 | case IPSTATS_MIB_INNOROUTES: |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1872 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 1873 | if (type == IPV6_ADDR_ANY) { |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1874 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 1875 | IPSTATS_MIB_INADDRERRORS); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1876 | break; |
| 1877 | } |
| 1878 | /* FALLTHROUGH */ |
| 1879 | case IPSTATS_MIB_OUTNOROUTES: |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1880 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
| 1881 | ipstats_mib_noroutes); |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1882 | break; |
| 1883 | } |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1884 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | kfree_skb(skb); |
| 1886 | return 0; |
| 1887 | } |
| 1888 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1889 | static int ip6_pkt_discard(struct sk_buff *skb) |
| 1890 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1891 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1892 | } |
| 1893 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1894 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1896 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1897 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | } |
| 1899 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1900 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 1901 | |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1902 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
| 1903 | { |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1904 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1905 | } |
| 1906 | |
| 1907 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) |
| 1908 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1909 | skb->dev = skb_dst(skb)->dev; |
YOSHIFUJI Hideaki | 612f09e | 2007-04-13 16:18:02 -0700 | [diff] [blame] | 1910 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
Thomas Graf | 9ce8ade | 2006-10-18 20:46:54 -0700 | [diff] [blame] | 1911 | } |
| 1912 | |
David S. Miller | 6723ab5 | 2006-10-18 21:20:57 -0700 | [diff] [blame] | 1913 | #endif |
| 1914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | /* |
| 1916 | * Allocate a dst for local (unicast / anycast) address. |
| 1917 | */ |
| 1918 | |
| 1919 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 1920 | const struct in6_addr *addr, |
| 1921 | int anycast) |
| 1922 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1923 | struct net *net = dev_net(idev->dev); |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 1924 | struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1925 | struct neighbour *neigh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | |
| 1927 | if (rt == NULL) |
| 1928 | return ERR_PTR(-ENOMEM); |
| 1929 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1930 | dev_hold(net->loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | in6_dev_hold(idev); |
| 1932 | |
| 1933 | rt->u.dst.flags = DST_HOST; |
| 1934 | rt->u.dst.input = ip6_input; |
| 1935 | rt->u.dst.output = ip6_output; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1936 | rt->rt6i_dev = net->loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | rt->rt6i_idev = idev; |
| 1938 | 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] | 1939 | 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] | 1940 | rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1; |
| 1941 | rt->u.dst.obsolete = -1; |
| 1942 | |
| 1943 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; |
YOSHIFUJI Hideaki | 58c4fb8 | 2005-12-21 22:56:42 +0900 | [diff] [blame] | 1944 | if (anycast) |
| 1945 | rt->rt6i_flags |= RTF_ANYCAST; |
| 1946 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | rt->rt6i_flags |= RTF_LOCAL; |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1948 | neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway); |
| 1949 | if (IS_ERR(neigh)) { |
YOSHIFUJI Hideaki | 40aa7b9 | 2006-10-19 13:50:09 +0900 | [diff] [blame] | 1950 | dst_free(&rt->u.dst); |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1951 | |
| 1952 | /* We are casting this because that is the return |
| 1953 | * value type. But an errno encoded pointer is the |
| 1954 | * same regardless of the underlying pointer type, |
| 1955 | * and that's what we are returning. So this is OK. |
| 1956 | */ |
| 1957 | return (struct rt6_info *) neigh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
David S. Miller | 14deae4 | 2009-01-04 16:04:39 -0800 | [diff] [blame] | 1959 | rt->rt6i_nexthop = neigh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | |
| 1961 | ipv6_addr_copy(&rt->rt6i_dst.addr, addr); |
| 1962 | rt->rt6i_dst.plen = 128; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 1963 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | |
| 1965 | atomic_set(&rt->u.dst.__refcnt, 1); |
| 1966 | |
| 1967 | return rt; |
| 1968 | } |
| 1969 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1970 | struct arg_dev_net { |
| 1971 | struct net_device *dev; |
| 1972 | struct net *net; |
| 1973 | }; |
| 1974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
| 1976 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1977 | struct net_device *dev = ((struct arg_dev_net *)arg)->dev; |
| 1978 | struct net *net = ((struct arg_dev_net *)arg)->net; |
| 1979 | |
| 1980 | if (((void *)rt->rt6i_dev == dev || dev == NULL) && |
| 1981 | rt != net->ipv6.ip6_null_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | RT6_TRACE("deleted by ifdown %p\n", rt); |
| 1983 | return -1; |
| 1984 | } |
| 1985 | return 0; |
| 1986 | } |
| 1987 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 1988 | void rt6_ifdown(struct net *net, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 1990 | struct arg_dev_net adn = { |
| 1991 | .dev = dev, |
| 1992 | .net = net, |
| 1993 | }; |
| 1994 | |
| 1995 | fib6_clean_all(net, fib6_ifdown, 0, &adn); |
David S. Miller | 1e493d1 | 2008-09-10 17:27:15 -0700 | [diff] [blame] | 1996 | icmp6_clean_all(fib6_ifdown, &adn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | } |
| 1998 | |
| 1999 | struct rt6_mtu_change_arg |
| 2000 | { |
| 2001 | struct net_device *dev; |
| 2002 | unsigned mtu; |
| 2003 | }; |
| 2004 | |
| 2005 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) |
| 2006 | { |
| 2007 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; |
| 2008 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2009 | struct net *net = dev_net(arg->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | |
| 2011 | /* In IPv6 pmtu discovery is not optional, |
| 2012 | so that RTAX_MTU lock cannot disable it. |
| 2013 | We still use this lock to block changes |
| 2014 | caused by addrconf/ndisc. |
| 2015 | */ |
| 2016 | |
| 2017 | idev = __in6_dev_get(arg->dev); |
| 2018 | if (idev == NULL) |
| 2019 | return 0; |
| 2020 | |
| 2021 | /* For administrative MTU increase, there is no way to discover |
| 2022 | IPv6 PMTU increase, so PMTU increase should be updated here. |
| 2023 | Since RFC 1981 doesn't include administrative MTU increase |
| 2024 | update PMTU increase is a MUST. (i.e. jumbo frame) |
| 2025 | */ |
| 2026 | /* |
| 2027 | If new MTU is less than route PMTU, this new MTU will be the |
| 2028 | lowest MTU in the path, update the route PMTU to reflect PMTU |
| 2029 | decreases; if new MTU is greater than route PMTU, and the |
| 2030 | old MTU is the lowest MTU in the path, update the route PMTU |
| 2031 | to reflect the increase. In this case if the other nodes' MTU |
| 2032 | also have the lowest MTU, TOO BIG MESSAGE will be lead to |
| 2033 | PMTU discouvery. |
| 2034 | */ |
| 2035 | if (rt->rt6i_dev == arg->dev && |
| 2036 | !dst_metric_locked(&rt->u.dst, RTAX_MTU) && |
Jim Paris | 2371779 | 2008-01-31 16:36:25 -0800 | [diff] [blame] | 2037 | (dst_mtu(&rt->u.dst) >= arg->mtu || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2038 | (dst_mtu(&rt->u.dst) < arg->mtu && |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2039 | dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2041 | rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu); |
Simon Arlott | 566cfd8 | 2007-07-26 00:09:55 -0700 | [diff] [blame] | 2042 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | return 0; |
| 2044 | } |
| 2045 | |
| 2046 | void rt6_mtu_change(struct net_device *dev, unsigned mtu) |
| 2047 | { |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2048 | struct rt6_mtu_change_arg arg = { |
| 2049 | .dev = dev, |
| 2050 | .mtu = mtu, |
| 2051 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2053 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
| 2055 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 2056 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 2057 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2058 | [RTA_OIF] = { .type = NLA_U32 }, |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2059 | [RTA_IIF] = { .type = NLA_U32 }, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2060 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
| 2061 | [RTA_METRICS] = { .type = NLA_NESTED }, |
| 2062 | }; |
| 2063 | |
| 2064 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 2065 | struct fib6_config *cfg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2067 | struct rtmsg *rtm; |
| 2068 | struct nlattr *tb[RTA_MAX+1]; |
| 2069 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2071 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2072 | if (err < 0) |
| 2073 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2075 | err = -EINVAL; |
| 2076 | rtm = nlmsg_data(nlh); |
| 2077 | memset(cfg, 0, sizeof(*cfg)); |
| 2078 | |
| 2079 | cfg->fc_table = rtm->rtm_table; |
| 2080 | cfg->fc_dst_len = rtm->rtm_dst_len; |
| 2081 | cfg->fc_src_len = rtm->rtm_src_len; |
| 2082 | cfg->fc_flags = RTF_UP; |
| 2083 | cfg->fc_protocol = rtm->rtm_protocol; |
| 2084 | |
| 2085 | if (rtm->rtm_type == RTN_UNREACHABLE) |
| 2086 | cfg->fc_flags |= RTF_REJECT; |
| 2087 | |
| 2088 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; |
| 2089 | cfg->fc_nlinfo.nlh = nlh; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2090 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2091 | |
| 2092 | if (tb[RTA_GATEWAY]) { |
| 2093 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); |
| 2094 | cfg->fc_flags |= RTF_GATEWAY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2096 | |
| 2097 | if (tb[RTA_DST]) { |
| 2098 | int plen = (rtm->rtm_dst_len + 7) >> 3; |
| 2099 | |
| 2100 | if (nla_len(tb[RTA_DST]) < plen) |
| 2101 | goto errout; |
| 2102 | |
| 2103 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2105 | |
| 2106 | if (tb[RTA_SRC]) { |
| 2107 | int plen = (rtm->rtm_src_len + 7) >> 3; |
| 2108 | |
| 2109 | if (nla_len(tb[RTA_SRC]) < plen) |
| 2110 | goto errout; |
| 2111 | |
| 2112 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2114 | |
| 2115 | if (tb[RTA_OIF]) |
| 2116 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); |
| 2117 | |
| 2118 | if (tb[RTA_PRIORITY]) |
| 2119 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); |
| 2120 | |
| 2121 | if (tb[RTA_METRICS]) { |
| 2122 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); |
| 2123 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | } |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2125 | |
| 2126 | if (tb[RTA_TABLE]) |
| 2127 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); |
| 2128 | |
| 2129 | err = 0; |
| 2130 | errout: |
| 2131 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | } |
| 2133 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2134 | 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] | 2135 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2136 | struct fib6_config cfg; |
| 2137 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2139 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2140 | if (err < 0) |
| 2141 | return err; |
| 2142 | |
| 2143 | return ip6_route_del(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | } |
| 2145 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2146 | 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] | 2147 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2148 | struct fib6_config cfg; |
| 2149 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2151 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
| 2152 | if (err < 0) |
| 2153 | return err; |
| 2154 | |
| 2155 | return ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | } |
| 2157 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2158 | static inline size_t rt6_nlmsg_size(void) |
| 2159 | { |
| 2160 | return NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2161 | + nla_total_size(16) /* RTA_SRC */ |
| 2162 | + nla_total_size(16) /* RTA_DST */ |
| 2163 | + nla_total_size(16) /* RTA_GATEWAY */ |
| 2164 | + nla_total_size(16) /* RTA_PREFSRC */ |
| 2165 | + nla_total_size(4) /* RTA_TABLE */ |
| 2166 | + nla_total_size(4) /* RTA_IIF */ |
| 2167 | + nla_total_size(4) /* RTA_OIF */ |
| 2168 | + nla_total_size(4) /* RTA_PRIORITY */ |
Noriaki TAKAMIYA | 6a2b9ce | 2007-01-23 22:09:41 -0800 | [diff] [blame] | 2169 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2170 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
| 2171 | } |
| 2172 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2173 | static int rt6_fill_node(struct net *net, |
| 2174 | struct sk_buff *skb, struct rt6_info *rt, |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 2175 | struct in6_addr *dst, struct in6_addr *src, |
| 2176 | int iif, int type, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2177 | int prefix, int nowait, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | { |
| 2179 | struct rtmsg *rtm; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2180 | struct nlmsghdr *nlh; |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2181 | long expires; |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2182 | u32 table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | |
| 2184 | if (prefix) { /* user wants prefix routes only */ |
| 2185 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { |
| 2186 | /* success since this is not a prefix route */ |
| 2187 | return 1; |
| 2188 | } |
| 2189 | } |
| 2190 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2191 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags); |
| 2192 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2193 | return -EMSGSIZE; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2194 | |
| 2195 | rtm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | rtm->rtm_family = AF_INET6; |
| 2197 | rtm->rtm_dst_len = rt->rt6i_dst.plen; |
| 2198 | rtm->rtm_src_len = rt->rt6i_src.plen; |
| 2199 | rtm->rtm_tos = 0; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2200 | if (rt->rt6i_table) |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2201 | table = rt->rt6i_table->tb6_id; |
Thomas Graf | c71099a | 2006-08-04 23:20:06 -0700 | [diff] [blame] | 2202 | else |
Patrick McHardy | 9e762a4 | 2006-08-10 23:09:48 -0700 | [diff] [blame] | 2203 | table = RT6_TABLE_UNSPEC; |
| 2204 | rtm->rtm_table = table; |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2205 | NLA_PUT_U32(skb, RTA_TABLE, table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | if (rt->rt6i_flags&RTF_REJECT) |
| 2207 | rtm->rtm_type = RTN_UNREACHABLE; |
| 2208 | else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK)) |
| 2209 | rtm->rtm_type = RTN_LOCAL; |
| 2210 | else |
| 2211 | rtm->rtm_type = RTN_UNICAST; |
| 2212 | rtm->rtm_flags = 0; |
| 2213 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
| 2214 | rtm->rtm_protocol = rt->rt6i_protocol; |
| 2215 | if (rt->rt6i_flags&RTF_DYNAMIC) |
| 2216 | rtm->rtm_protocol = RTPROT_REDIRECT; |
| 2217 | else if (rt->rt6i_flags & RTF_ADDRCONF) |
| 2218 | rtm->rtm_protocol = RTPROT_KERNEL; |
| 2219 | else if (rt->rt6i_flags&RTF_DEFAULT) |
| 2220 | rtm->rtm_protocol = RTPROT_RA; |
| 2221 | |
| 2222 | if (rt->rt6i_flags&RTF_CACHE) |
| 2223 | rtm->rtm_flags |= RTM_F_CLONED; |
| 2224 | |
| 2225 | if (dst) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2226 | NLA_PUT(skb, RTA_DST, 16, dst); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2227 | rtm->rtm_dst_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | } else if (rtm->rtm_dst_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2229 | NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | #ifdef CONFIG_IPV6_SUBTREES |
| 2231 | if (src) { |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2232 | NLA_PUT(skb, RTA_SRC, 16, src); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2233 | rtm->rtm_src_len = 128; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | } else if (rtm->rtm_src_len) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2235 | NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2237 | if (iif) { |
| 2238 | #ifdef CONFIG_IPV6_MROUTE |
| 2239 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2240 | int err = ip6mr_get_route(net, skb, rtm, nowait); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2241 | if (err <= 0) { |
| 2242 | if (!nowait) { |
| 2243 | if (err == 0) |
| 2244 | return 0; |
| 2245 | goto nla_put_failure; |
| 2246 | } else { |
| 2247 | if (err == -EMSGSIZE) |
| 2248 | goto nla_put_failure; |
| 2249 | } |
| 2250 | } |
| 2251 | } else |
| 2252 | #endif |
| 2253 | NLA_PUT_U32(skb, RTA_IIF, iif); |
| 2254 | } else if (dst) { |
Brian Haley | 5e0115e | 2008-08-13 01:58:57 -0700 | [diff] [blame] | 2255 | struct inet6_dev *idev = ip6_dst_idev(&rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | struct in6_addr saddr_buf; |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2257 | if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 2258 | dst, 0, &saddr_buf) == 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2259 | NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | } |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2263 | goto nla_put_failure; |
| 2264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | if (rt->u.dst.neighbour) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2266 | NLA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key); |
| 2267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | if (rt->u.dst.dev) |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2269 | NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex); |
| 2270 | |
| 2271 | NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric); |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2272 | |
YOSHIFUJI Hideaki | 36e3dea | 2008-05-13 02:52:55 +0900 | [diff] [blame] | 2273 | if (!(rt->rt6i_flags & RTF_EXPIRES)) |
| 2274 | expires = 0; |
| 2275 | else if (rt->rt6i_expires - jiffies < INT_MAX) |
| 2276 | expires = rt->rt6i_expires - jiffies; |
| 2277 | else |
| 2278 | expires = INT_MAX; |
YOSHIFUJI Hideaki | 69cdf8f | 2008-05-19 16:55:13 -0700 | [diff] [blame] | 2279 | |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 2280 | if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0, |
| 2281 | expires, rt->u.dst.error) < 0) |
| 2282 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2284 | return nlmsg_end(skb, nlh); |
| 2285 | |
| 2286 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2287 | nlmsg_cancel(skb, nlh); |
| 2288 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | } |
| 2290 | |
Patrick McHardy | 1b43af5 | 2006-08-10 23:11:17 -0700 | [diff] [blame] | 2291 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | { |
| 2293 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; |
| 2294 | int prefix; |
| 2295 | |
Thomas Graf | 2d7202b | 2006-08-22 00:01:27 -0700 | [diff] [blame] | 2296 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
| 2297 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
| 2299 | } else |
| 2300 | prefix = 0; |
| 2301 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2302 | return rt6_fill_node(arg->net, |
| 2303 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2305 | prefix, 0, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | } |
| 2307 | |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 2308 | 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] | 2309 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2310 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2311 | struct nlattr *tb[RTA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | struct rt6_info *rt; |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2313 | struct sk_buff *skb; |
| 2314 | struct rtmsg *rtm; |
| 2315 | struct flowi fl; |
| 2316 | int err, iif = 0; |
| 2317 | |
| 2318 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
| 2319 | if (err < 0) |
| 2320 | goto errout; |
| 2321 | |
| 2322 | err = -EINVAL; |
| 2323 | memset(&fl, 0, sizeof(fl)); |
| 2324 | |
| 2325 | if (tb[RTA_SRC]) { |
| 2326 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) |
| 2327 | goto errout; |
| 2328 | |
| 2329 | ipv6_addr_copy(&fl.fl6_src, nla_data(tb[RTA_SRC])); |
| 2330 | } |
| 2331 | |
| 2332 | if (tb[RTA_DST]) { |
| 2333 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) |
| 2334 | goto errout; |
| 2335 | |
| 2336 | ipv6_addr_copy(&fl.fl6_dst, nla_data(tb[RTA_DST])); |
| 2337 | } |
| 2338 | |
| 2339 | if (tb[RTA_IIF]) |
| 2340 | iif = nla_get_u32(tb[RTA_IIF]); |
| 2341 | |
| 2342 | if (tb[RTA_OIF]) |
| 2343 | fl.oif = nla_get_u32(tb[RTA_OIF]); |
| 2344 | |
| 2345 | if (iif) { |
| 2346 | struct net_device *dev; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2347 | dev = __dev_get_by_index(net, iif); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2348 | if (!dev) { |
| 2349 | err = -ENODEV; |
| 2350 | goto errout; |
| 2351 | } |
| 2352 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | |
| 2354 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2355 | if (skb == NULL) { |
| 2356 | err = -ENOBUFS; |
| 2357 | goto errout; |
| 2358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | |
| 2360 | /* Reserve room for dummy headers, this skb can pass |
| 2361 | through good chunk of routing engine. |
| 2362 | */ |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 2363 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
| 2365 | |
Daniel Lezcano | 8a3edd8 | 2008-03-07 11:14:16 -0800 | [diff] [blame] | 2366 | rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2367 | skb_dst_set(skb, &rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2369 | 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] | 2370 | RTM_NEWROUTE, NETLINK_CB(in_skb).pid, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2371 | nlh->nlmsg_seq, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | if (err < 0) { |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2373 | kfree_skb(skb); |
| 2374 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | } |
| 2376 | |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2377 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | ab364a6 | 2006-08-22 00:01:47 -0700 | [diff] [blame] | 2378 | errout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | } |
| 2381 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2382 | 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] | 2383 | { |
| 2384 | struct sk_buff *skb; |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2385 | struct net *net = info->nl_net; |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2386 | u32 seq; |
| 2387 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | |
Denis V. Lunev | 528c4ce | 2007-12-13 09:45:12 -0800 | [diff] [blame] | 2389 | err = -ENOBUFS; |
| 2390 | seq = info->nlh != NULL ? info->nlh->nlmsg_seq : 0; |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2391 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 2392 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2393 | if (skb == NULL) |
| 2394 | goto errout; |
| 2395 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 2396 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2397 | event, info->pid, seq, 0, 0, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 2398 | if (err < 0) { |
| 2399 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ |
| 2400 | WARN_ON(err == -EMSGSIZE); |
| 2401 | kfree_skb(skb); |
| 2402 | goto errout; |
| 2403 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 2404 | rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE, |
| 2405 | info->nlh, gfp_any()); |
| 2406 | return; |
Thomas Graf | 21713eb | 2006-08-15 00:35:24 -0700 | [diff] [blame] | 2407 | errout: |
| 2408 | if (err < 0) |
Daniel Lezcano | 5578689 | 2008-03-04 13:47:47 -0800 | [diff] [blame] | 2409 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | } |
| 2411 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2412 | static int ip6_route_dev_notify(struct notifier_block *this, |
| 2413 | unsigned long event, void *data) |
| 2414 | { |
| 2415 | struct net_device *dev = (struct net_device *)data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2416 | struct net *net = dev_net(dev); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2417 | |
| 2418 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { |
| 2419 | net->ipv6.ip6_null_entry->u.dst.dev = dev; |
| 2420 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
| 2421 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2422 | net->ipv6.ip6_prohibit_entry->u.dst.dev = dev; |
| 2423 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
| 2424 | net->ipv6.ip6_blk_hole_entry->u.dst.dev = dev; |
| 2425 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
| 2426 | #endif |
| 2427 | } |
| 2428 | |
| 2429 | return NOTIFY_OK; |
| 2430 | } |
| 2431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | /* |
| 2433 | * /proc |
| 2434 | */ |
| 2435 | |
| 2436 | #ifdef CONFIG_PROC_FS |
| 2437 | |
| 2438 | #define RT6_INFO_LEN (32 + 4 + 32 + 4 + 32 + 40 + 5 + 1) |
| 2439 | |
| 2440 | struct rt6_proc_arg |
| 2441 | { |
| 2442 | char *buffer; |
| 2443 | int offset; |
| 2444 | int length; |
| 2445 | int skip; |
| 2446 | int len; |
| 2447 | }; |
| 2448 | |
| 2449 | static int rt6_info_route(struct rt6_info *rt, void *p_arg) |
| 2450 | { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2451 | struct seq_file *m = p_arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2453 | 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] | 2454 | |
| 2455 | #ifdef CONFIG_IPV6_SUBTREES |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2456 | 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] | 2457 | #else |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2458 | seq_puts(m, "00000000000000000000000000000000 00 "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2459 | #endif |
| 2460 | |
| 2461 | if (rt->rt6i_nexthop) { |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2462 | seq_printf(m, "%pi6", rt->rt6i_nexthop->primary_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | } else { |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2464 | seq_puts(m, "00000000000000000000000000000000"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | } |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2466 | seq_printf(m, " %08x %08x %08x %08x %8s\n", |
| 2467 | rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt), |
| 2468 | rt->u.dst.__use, rt->rt6i_flags, |
| 2469 | rt->rt6i_dev ? rt->rt6i_dev->name : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | return 0; |
| 2471 | } |
| 2472 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2473 | static int ipv6_route_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | { |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2475 | struct net *net = (struct net *)m->private; |
| 2476 | fib6_clean_all(net, rt6_info_route, 0, m); |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2477 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | } |
| 2479 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2480 | static int ipv6_route_open(struct inode *inode, struct file *file) |
| 2481 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2482 | return single_open_net(inode, file, ipv6_route_show); |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2483 | } |
| 2484 | |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2485 | static const struct file_operations ipv6_route_proc_fops = { |
| 2486 | .owner = THIS_MODULE, |
| 2487 | .open = ipv6_route_open, |
| 2488 | .read = seq_read, |
| 2489 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2490 | .release = single_release_net, |
Alexey Dobriyan | 33120b3 | 2007-11-06 05:27:11 -0800 | [diff] [blame] | 2491 | }; |
| 2492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
| 2494 | { |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2495 | struct net *net = (struct net *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2497 | net->ipv6.rt6_stats->fib_nodes, |
| 2498 | net->ipv6.rt6_stats->fib_route_nodes, |
| 2499 | net->ipv6.rt6_stats->fib_rt_alloc, |
| 2500 | net->ipv6.rt6_stats->fib_rt_entries, |
| 2501 | net->ipv6.rt6_stats->fib_rt_cache, |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2502 | atomic_read(&net->ipv6.ip6_dst_ops.entries), |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2503 | net->ipv6.rt6_stats->fib_discarded_routes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | |
| 2505 | return 0; |
| 2506 | } |
| 2507 | |
| 2508 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) |
| 2509 | { |
Pavel Emelyanov | de05c55 | 2008-07-18 04:07:21 -0700 | [diff] [blame] | 2510 | return single_open_net(inode, file, rt6_stats_seq_show); |
Daniel Lezcano | 69ddb80 | 2008-03-04 13:46:23 -0800 | [diff] [blame] | 2511 | } |
| 2512 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2513 | static const struct file_operations rt6_stats_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | .owner = THIS_MODULE, |
| 2515 | .open = rt6_stats_seq_open, |
| 2516 | .read = seq_read, |
| 2517 | .llseek = seq_lseek, |
Pavel Emelyanov | b6fcbdb | 2008-07-18 04:07:44 -0700 | [diff] [blame] | 2518 | .release = single_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | }; |
| 2520 | #endif /* CONFIG_PROC_FS */ |
| 2521 | |
| 2522 | #ifdef CONFIG_SYSCTL |
| 2523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | static |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2525 | int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 2527 | { |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2528 | struct net *net = current->nsproxy->net_ns; |
| 2529 | int delay = net->ipv6.sysctl.flush_delay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | if (write) { |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2531 | proc_dointvec(ctl, write, buffer, lenp, ppos); |
Daniel Lezcano | 5b7c931 | 2008-03-03 23:28:58 -0800 | [diff] [blame] | 2532 | fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | return 0; |
| 2534 | } else |
| 2535 | return -EINVAL; |
| 2536 | } |
| 2537 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2538 | ctl_table ipv6_route_table_template[] = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2539 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | .procname = "flush", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2541 | .data = &init_net.ipv6.sysctl.flush_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | .maxlen = sizeof(int), |
Dave Jones | 89c8b3a1 | 2005-04-28 12:11:49 -0700 | [diff] [blame] | 2543 | .mode = 0200, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2544 | .proc_handler = ipv6_sysctl_rtcache_flush |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | }, |
| 2546 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | .procname = "gc_thresh", |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2548 | .data = &ip6_dst_ops_template.gc_thresh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | .maxlen = sizeof(int), |
| 2550 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2551 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | }, |
| 2553 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | .procname = "max_size", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2555 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | .maxlen = sizeof(int), |
| 2557 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2558 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | }, |
| 2560 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | .procname = "gc_min_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2562 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | .maxlen = sizeof(int), |
| 2564 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2565 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | }, |
| 2567 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | .procname = "gc_timeout", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2569 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | .maxlen = sizeof(int), |
| 2571 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2572 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | }, |
| 2574 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | .procname = "gc_interval", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2576 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | .maxlen = sizeof(int), |
| 2578 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2579 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | }, |
| 2581 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | .procname = "gc_elasticity", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2583 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | .maxlen = sizeof(int), |
| 2585 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2586 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | }, |
| 2588 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | .procname = "mtu_expires", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2590 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | .maxlen = sizeof(int), |
| 2592 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2593 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | }, |
| 2595 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | .procname = "min_adv_mss", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2597 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | .maxlen = sizeof(int), |
| 2599 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2600 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | }, |
| 2602 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | .procname = "gc_min_interval_ms", |
Daniel Lezcano | 4990509 | 2008-01-10 03:01:01 -0800 | [diff] [blame] | 2604 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | .maxlen = sizeof(int), |
| 2606 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 2607 | .proc_handler = proc_dointvec_ms_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2609 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | }; |
| 2611 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2612 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2613 | { |
| 2614 | struct ctl_table *table; |
| 2615 | |
| 2616 | table = kmemdup(ipv6_route_table_template, |
| 2617 | sizeof(ipv6_route_table_template), |
| 2618 | GFP_KERNEL); |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2619 | |
| 2620 | if (table) { |
| 2621 | table[0].data = &net->ipv6.sysctl.flush_delay; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2622 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2623 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
| 2624 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
| 2625 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; |
| 2626 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; |
| 2627 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; |
| 2628 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; |
| 2629 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; |
Alexey Dobriyan | 9c69fab | 2009-12-18 20:11:03 -0800 | [diff] [blame] | 2630 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
YOSHIFUJI Hideaki | 5ee0910 | 2008-02-28 00:24:28 +0900 | [diff] [blame] | 2631 | } |
| 2632 | |
Daniel Lezcano | 760f2d0 | 2008-01-10 02:53:43 -0800 | [diff] [blame] | 2633 | return table; |
| 2634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2635 | #endif |
| 2636 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2637 | static int __net_init ip6_route_net_init(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2638 | { |
Pavel Emelyanov | 633d424b | 2008-04-21 14:25:23 -0700 | [diff] [blame] | 2639 | int ret = -ENOMEM; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2640 | |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2641 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
| 2642 | sizeof(net->ipv6.ip6_dst_ops)); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2643 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2644 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
| 2645 | sizeof(*net->ipv6.ip6_null_entry), |
| 2646 | GFP_KERNEL); |
| 2647 | if (!net->ipv6.ip6_null_entry) |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2648 | goto out_ip6_dst_ops; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2649 | net->ipv6.ip6_null_entry->u.dst.path = |
| 2650 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2651 | 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] | 2652 | |
| 2653 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2654 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, |
| 2655 | sizeof(*net->ipv6.ip6_prohibit_entry), |
| 2656 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2657 | if (!net->ipv6.ip6_prohibit_entry) |
| 2658 | goto out_ip6_null_entry; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2659 | net->ipv6.ip6_prohibit_entry->u.dst.path = |
| 2660 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2661 | 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] | 2662 | |
| 2663 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, |
| 2664 | sizeof(*net->ipv6.ip6_blk_hole_entry), |
| 2665 | GFP_KERNEL); |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2666 | if (!net->ipv6.ip6_blk_hole_entry) |
| 2667 | goto out_ip6_prohibit_entry; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2668 | net->ipv6.ip6_blk_hole_entry->u.dst.path = |
| 2669 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
Alexey Dobriyan | 86393e5 | 2009-08-29 01:34:49 +0000 | [diff] [blame] | 2670 | 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] | 2671 | #endif |
| 2672 | |
Peter Zijlstra | b339a47c | 2008-10-07 14:15:00 -0700 | [diff] [blame] | 2673 | net->ipv6.sysctl.flush_delay = 0; |
| 2674 | net->ipv6.sysctl.ip6_rt_max_size = 4096; |
| 2675 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; |
| 2676 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; |
| 2677 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; |
| 2678 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; |
| 2679 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; |
| 2680 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; |
| 2681 | |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2682 | #ifdef CONFIG_PROC_FS |
| 2683 | proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops); |
| 2684 | proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops); |
| 2685 | #endif |
Benjamin Thery | 6891a34 | 2008-03-04 13:49:47 -0800 | [diff] [blame] | 2686 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
| 2687 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2688 | ret = 0; |
| 2689 | out: |
| 2690 | return ret; |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2691 | |
Peter Zijlstra | 68fffc6 | 2008-10-07 14:12:10 -0700 | [diff] [blame] | 2692 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2693 | out_ip6_prohibit_entry: |
| 2694 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2695 | out_ip6_null_entry: |
| 2696 | kfree(net->ipv6.ip6_null_entry); |
| 2697 | #endif |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2698 | out_ip6_dst_ops: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2699 | goto out; |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2700 | } |
| 2701 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2702 | static void __net_exit ip6_route_net_exit(struct net *net) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2703 | { |
| 2704 | #ifdef CONFIG_PROC_FS |
| 2705 | proc_net_remove(net, "ipv6_route"); |
| 2706 | proc_net_remove(net, "rt6_stats"); |
| 2707 | #endif |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2708 | kfree(net->ipv6.ip6_null_entry); |
| 2709 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2710 | kfree(net->ipv6.ip6_prohibit_entry); |
| 2711 | kfree(net->ipv6.ip6_blk_hole_entry); |
| 2712 | #endif |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2713 | } |
| 2714 | |
| 2715 | static struct pernet_operations ip6_route_net_ops = { |
| 2716 | .init = ip6_route_net_init, |
| 2717 | .exit = ip6_route_net_exit, |
| 2718 | }; |
| 2719 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2720 | static struct notifier_block ip6_route_dev_notifier = { |
| 2721 | .notifier_call = ip6_route_dev_notify, |
| 2722 | .priority = 0, |
| 2723 | }; |
| 2724 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2725 | int __init ip6_route_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | { |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2727 | int ret; |
| 2728 | |
Daniel Lezcano | 9a7ec3a | 2008-03-04 13:48:53 -0800 | [diff] [blame] | 2729 | ret = -ENOMEM; |
| 2730 | ip6_dst_ops_template.kmem_cachep = |
| 2731 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
| 2732 | SLAB_HWCACHE_ALIGN, NULL); |
| 2733 | if (!ip6_dst_ops_template.kmem_cachep) |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 2734 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 2735 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2736 | ret = register_pernet_subsys(&ip6_route_net_ops); |
| 2737 | if (ret) |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2738 | goto out_kmem_cache; |
Daniel Lezcano | bdb3289 | 2008-03-04 13:48:10 -0800 | [diff] [blame] | 2739 | |
Arnaud Ebalard | 5dc121e | 2008-10-01 02:37:56 -0700 | [diff] [blame] | 2740 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
| 2741 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2742 | /* Registering of the loopback is done before this portion of code, |
| 2743 | * the loopback reference in rt6_info will not be taken, do it |
| 2744 | * manually for init_net */ |
| 2745 | init_net.ipv6.ip6_null_entry->u.dst.dev = init_net.loopback_dev; |
| 2746 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2747 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
| 2748 | init_net.ipv6.ip6_prohibit_entry->u.dst.dev = init_net.loopback_dev; |
| 2749 | init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2750 | init_net.ipv6.ip6_blk_hole_entry->u.dst.dev = init_net.loopback_dev; |
| 2751 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
| 2752 | #endif |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2753 | ret = fib6_init(); |
| 2754 | if (ret) |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2755 | goto out_register_subsys; |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2756 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2757 | ret = xfrm6_init(); |
| 2758 | if (ret) |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2759 | goto out_fib6_init; |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 2760 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2761 | ret = fib6_rules_init(); |
| 2762 | if (ret) |
| 2763 | goto xfrm6_init; |
Daniel Lezcano | 7e5449c | 2007-12-08 00:14:54 -0800 | [diff] [blame] | 2764 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2765 | ret = -ENOBUFS; |
| 2766 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL) || |
| 2767 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL) || |
| 2768 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL)) |
| 2769 | goto fib6_rules_init; |
| 2770 | |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2771 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
Daniel Lezcano | cdb1876 | 2008-03-04 13:45:33 -0800 | [diff] [blame] | 2772 | if (ret) |
| 2773 | goto fib6_rules_init; |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2774 | |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2775 | out: |
| 2776 | return ret; |
| 2777 | |
| 2778 | fib6_rules_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2779 | fib6_rules_cleanup(); |
| 2780 | xfrm6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2781 | xfrm6_fini(); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2782 | out_fib6_init: |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2783 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2784 | out_register_subsys: |
| 2785 | unregister_pernet_subsys(&ip6_route_net_ops); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2786 | out_kmem_cache: |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2787 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Daniel Lezcano | 433d49c | 2007-12-07 00:43:48 -0800 | [diff] [blame] | 2788 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | } |
| 2790 | |
| 2791 | void ip6_route_cleanup(void) |
| 2792 | { |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2793 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
Thomas Graf | 101367c | 2006-08-04 03:39:02 -0700 | [diff] [blame] | 2794 | fib6_rules_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | xfrm6_fini(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | fib6_gc_cleanup(); |
Daniel Lezcano | 8ed6778 | 2008-03-04 13:48:30 -0800 | [diff] [blame] | 2797 | unregister_pernet_subsys(&ip6_route_net_ops); |
Benjamin Thery | f2fc6a5 | 2008-03-04 13:49:23 -0800 | [diff] [blame] | 2798 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | } |