YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Linux IPv6 multicast routing support for BSD pim6sd |
| 3 | * Based on net/ipv4/ipmr.c. |
| 4 | * |
| 5 | * (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr> |
| 6 | * LSIIT Laboratory, Strasbourg, France |
| 7 | * (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com> |
| 8 | * 6WIND, Paris, France |
| 9 | * Copyright (C)2007,2008 USAGI/WIDE Project |
| 10 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version |
| 15 | * 2 of the License, or (at your option) any later version. |
| 16 | * |
| 17 | */ |
| 18 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 19 | #include <asm/uaccess.h> |
| 20 | #include <linux/types.h> |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/fcntl.h> |
| 27 | #include <linux/stat.h> |
| 28 | #include <linux/socket.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 29 | #include <linux/inet.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/inetdevice.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 32 | #include <linux/proc_fs.h> |
| 33 | #include <linux/seq_file.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 34 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
David S. Miller | e2d5776 | 2011-02-03 17:59:32 -0800 | [diff] [blame] | 36 | #include <linux/compat.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 37 | #include <net/protocol.h> |
| 38 | #include <linux/skbuff.h> |
| 39 | #include <net/sock.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 40 | #include <net/raw.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 41 | #include <linux/notifier.h> |
| 42 | #include <linux/if_arp.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 43 | #include <net/checksum.h> |
| 44 | #include <net/netlink.h> |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 45 | #include <net/fib_rules.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 46 | |
| 47 | #include <net/ipv6.h> |
| 48 | #include <net/ip6_route.h> |
| 49 | #include <linux/mroute6.h> |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 50 | #include <linux/pim.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 51 | #include <net/addrconf.h> |
| 52 | #include <linux/netfilter_ipv6.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 53 | #include <linux/export.h> |
Dave Jones | 5d6e430 | 2009-01-31 00:51:49 -0800 | [diff] [blame] | 54 | #include <net/ip6_checksum.h> |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 55 | #include <linux/netconf.h> |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 56 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 57 | struct mr6_table { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 58 | struct list_head list; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 59 | #ifdef CONFIG_NET_NS |
| 60 | struct net *net; |
| 61 | #endif |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 62 | u32 id; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 63 | struct sock *mroute6_sk; |
| 64 | struct timer_list ipmr_expire_timer; |
| 65 | struct list_head mfc6_unres_queue; |
| 66 | struct list_head mfc6_cache_array[MFC6_LINES]; |
| 67 | struct mif_device vif6_table[MAXMIFS]; |
| 68 | int maxvif; |
| 69 | atomic_t cache_resolve_queue_len; |
Joe Perches | 53d6841 | 2012-11-25 09:35:30 +0000 | [diff] [blame] | 70 | bool mroute_do_assert; |
| 71 | bool mroute_do_pim; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 72 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 73 | int mroute_reg_vif_num; |
| 74 | #endif |
| 75 | }; |
| 76 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 77 | struct ip6mr_rule { |
| 78 | struct fib_rule common; |
| 79 | }; |
| 80 | |
| 81 | struct ip6mr_result { |
| 82 | struct mr6_table *mrt; |
| 83 | }; |
| 84 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 85 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
| 86 | Note that the changes are semaphored via rtnl_lock. |
| 87 | */ |
| 88 | |
| 89 | static DEFINE_RWLOCK(mrt_lock); |
| 90 | |
| 91 | /* |
| 92 | * Multicast router control variables |
| 93 | */ |
| 94 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 95 | #define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 96 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 97 | /* Special spinlock for queue of unresolved entries */ |
| 98 | static DEFINE_SPINLOCK(mfc_unres_lock); |
| 99 | |
| 100 | /* We return to original Alan's scheme. Hash table of resolved |
| 101 | entries is changed only in process context and protected |
| 102 | with weak lock mrt_lock. Queue of unresolved entries is protected |
| 103 | with strong spinlock mfc_unres_lock. |
| 104 | |
| 105 | In this case data path is free of exclusive locks at all. |
| 106 | */ |
| 107 | |
| 108 | static struct kmem_cache *mrt_cachep __read_mostly; |
| 109 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 110 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id); |
| 111 | static void ip6mr_free_table(struct mr6_table *mrt); |
| 112 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 113 | static int ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
| 114 | struct sk_buff *skb, struct mfc6_cache *cache); |
| 115 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 116 | mifi_t mifi, int assert); |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 117 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
| 118 | struct mfc6_cache *c, struct rtmsg *rtm); |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 119 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, |
| 120 | int cmd); |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 121 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, |
| 122 | struct netlink_callback *cb); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 123 | static void mroute_clean_tables(struct mr6_table *mrt); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 124 | static void ipmr_expire_process(unsigned long arg); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 125 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 126 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES |
Eric Dumazet | 8ffb335 | 2010-06-06 15:34:40 -0700 | [diff] [blame] | 127 | #define ip6mr_for_each_table(mrt, net) \ |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 128 | list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) |
| 129 | |
| 130 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) |
| 131 | { |
| 132 | struct mr6_table *mrt; |
| 133 | |
| 134 | ip6mr_for_each_table(mrt, net) { |
| 135 | if (mrt->id == id) |
| 136 | return mrt; |
| 137 | } |
| 138 | return NULL; |
| 139 | } |
| 140 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 141 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 142 | struct mr6_table **mrt) |
| 143 | { |
| 144 | struct ip6mr_result res; |
| 145 | struct fib_lookup_arg arg = { .result = &res, }; |
| 146 | int err; |
| 147 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 148 | err = fib_rules_lookup(net->ipv6.mr6_rules_ops, |
| 149 | flowi6_to_flowi(flp6), 0, &arg); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 150 | if (err < 0) |
| 151 | return err; |
| 152 | *mrt = res.mrt; |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, |
| 157 | int flags, struct fib_lookup_arg *arg) |
| 158 | { |
| 159 | struct ip6mr_result *res = arg->result; |
| 160 | struct mr6_table *mrt; |
| 161 | |
| 162 | switch (rule->action) { |
| 163 | case FR_ACT_TO_TBL: |
| 164 | break; |
| 165 | case FR_ACT_UNREACHABLE: |
| 166 | return -ENETUNREACH; |
| 167 | case FR_ACT_PROHIBIT: |
| 168 | return -EACCES; |
| 169 | case FR_ACT_BLACKHOLE: |
| 170 | default: |
| 171 | return -EINVAL; |
| 172 | } |
| 173 | |
| 174 | mrt = ip6mr_get_table(rule->fr_net, rule->table); |
| 175 | if (mrt == NULL) |
| 176 | return -EAGAIN; |
| 177 | res->mrt = mrt; |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) |
| 182 | { |
| 183 | return 1; |
| 184 | } |
| 185 | |
| 186 | static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { |
| 187 | FRA_GENERIC_POLICY, |
| 188 | }; |
| 189 | |
| 190 | static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, |
| 191 | struct fib_rule_hdr *frh, struct nlattr **tb) |
| 192 | { |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, |
| 197 | struct nlattr **tb) |
| 198 | { |
| 199 | return 1; |
| 200 | } |
| 201 | |
| 202 | static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, |
| 203 | struct fib_rule_hdr *frh) |
| 204 | { |
| 205 | frh->dst_len = 0; |
| 206 | frh->src_len = 0; |
| 207 | frh->tos = 0; |
| 208 | return 0; |
| 209 | } |
| 210 | |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 211 | static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 212 | .family = RTNL_FAMILY_IP6MR, |
| 213 | .rule_size = sizeof(struct ip6mr_rule), |
| 214 | .addr_size = sizeof(struct in6_addr), |
| 215 | .action = ip6mr_rule_action, |
| 216 | .match = ip6mr_rule_match, |
| 217 | .configure = ip6mr_rule_configure, |
| 218 | .compare = ip6mr_rule_compare, |
| 219 | .default_pref = fib_default_rule_pref, |
| 220 | .fill = ip6mr_rule_fill, |
| 221 | .nlgroup = RTNLGRP_IPV6_RULE, |
| 222 | .policy = ip6mr_rule_policy, |
| 223 | .owner = THIS_MODULE, |
| 224 | }; |
| 225 | |
| 226 | static int __net_init ip6mr_rules_init(struct net *net) |
| 227 | { |
| 228 | struct fib_rules_ops *ops; |
| 229 | struct mr6_table *mrt; |
| 230 | int err; |
| 231 | |
| 232 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); |
| 233 | if (IS_ERR(ops)) |
| 234 | return PTR_ERR(ops); |
| 235 | |
| 236 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); |
| 237 | |
| 238 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); |
| 239 | if (mrt == NULL) { |
| 240 | err = -ENOMEM; |
| 241 | goto err1; |
| 242 | } |
| 243 | |
| 244 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); |
| 245 | if (err < 0) |
| 246 | goto err2; |
| 247 | |
| 248 | net->ipv6.mr6_rules_ops = ops; |
| 249 | return 0; |
| 250 | |
| 251 | err2: |
| 252 | kfree(mrt); |
| 253 | err1: |
| 254 | fib_rules_unregister(ops); |
| 255 | return err; |
| 256 | } |
| 257 | |
| 258 | static void __net_exit ip6mr_rules_exit(struct net *net) |
| 259 | { |
| 260 | struct mr6_table *mrt, *next; |
| 261 | |
Eric Dumazet | 035320d | 2010-06-06 23:48:40 +0000 | [diff] [blame] | 262 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
| 263 | list_del(&mrt->list); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 264 | ip6mr_free_table(mrt); |
Eric Dumazet | 035320d | 2010-06-06 23:48:40 +0000 | [diff] [blame] | 265 | } |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 266 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
| 267 | } |
| 268 | #else |
| 269 | #define ip6mr_for_each_table(mrt, net) \ |
| 270 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) |
| 271 | |
| 272 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) |
| 273 | { |
| 274 | return net->ipv6.mrt6; |
| 275 | } |
| 276 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 277 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 278 | struct mr6_table **mrt) |
| 279 | { |
| 280 | *mrt = net->ipv6.mrt6; |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int __net_init ip6mr_rules_init(struct net *net) |
| 285 | { |
| 286 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); |
| 287 | return net->ipv6.mrt6 ? 0 : -ENOMEM; |
| 288 | } |
| 289 | |
| 290 | static void __net_exit ip6mr_rules_exit(struct net *net) |
| 291 | { |
| 292 | ip6mr_free_table(net->ipv6.mrt6); |
| 293 | } |
| 294 | #endif |
| 295 | |
| 296 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) |
| 297 | { |
| 298 | struct mr6_table *mrt; |
| 299 | unsigned int i; |
| 300 | |
| 301 | mrt = ip6mr_get_table(net, id); |
| 302 | if (mrt != NULL) |
| 303 | return mrt; |
| 304 | |
| 305 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); |
| 306 | if (mrt == NULL) |
| 307 | return NULL; |
| 308 | mrt->id = id; |
| 309 | write_pnet(&mrt->net, net); |
| 310 | |
| 311 | /* Forwarding cache */ |
| 312 | for (i = 0; i < MFC6_LINES; i++) |
| 313 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); |
| 314 | |
| 315 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); |
| 316 | |
| 317 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, |
| 318 | (unsigned long)mrt); |
| 319 | |
| 320 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 321 | mrt->mroute_reg_vif_num = -1; |
| 322 | #endif |
| 323 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES |
| 324 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); |
| 325 | #endif |
| 326 | return mrt; |
| 327 | } |
| 328 | |
| 329 | static void ip6mr_free_table(struct mr6_table *mrt) |
| 330 | { |
| 331 | del_timer(&mrt->ipmr_expire_timer); |
| 332 | mroute_clean_tables(mrt); |
| 333 | kfree(mrt); |
| 334 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 335 | |
| 336 | #ifdef CONFIG_PROC_FS |
| 337 | |
| 338 | struct ipmr_mfc_iter { |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 339 | struct seq_net_private p; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 340 | struct mr6_table *mrt; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 341 | struct list_head *cache; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 342 | int ct; |
| 343 | }; |
| 344 | |
| 345 | |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 346 | static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, |
| 347 | struct ipmr_mfc_iter *it, loff_t pos) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 348 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 349 | struct mr6_table *mrt = it->mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 350 | struct mfc6_cache *mfc; |
| 351 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 352 | read_lock(&mrt_lock); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 353 | for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 354 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 355 | list_for_each_entry(mfc, it->cache, list) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 356 | if (pos-- == 0) |
| 357 | return mfc; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 358 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 359 | read_unlock(&mrt_lock); |
| 360 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 361 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 362 | it->cache = &mrt->mfc6_unres_queue; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 363 | list_for_each_entry(mfc, it->cache, list) |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 364 | if (pos-- == 0) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 365 | return mfc; |
| 366 | spin_unlock_bh(&mfc_unres_lock); |
| 367 | |
| 368 | it->cache = NULL; |
| 369 | return NULL; |
| 370 | } |
| 371 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 372 | /* |
| 373 | * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif |
| 374 | */ |
| 375 | |
| 376 | struct ipmr_vif_iter { |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 377 | struct seq_net_private p; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 378 | struct mr6_table *mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 379 | int ct; |
| 380 | }; |
| 381 | |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 382 | static struct mif_device *ip6mr_vif_seq_idx(struct net *net, |
| 383 | struct ipmr_vif_iter *iter, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 384 | loff_t pos) |
| 385 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 386 | struct mr6_table *mrt = iter->mrt; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 387 | |
| 388 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { |
| 389 | if (!MIF_EXISTS(mrt, iter->ct)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 390 | continue; |
| 391 | if (pos-- == 0) |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 392 | return &mrt->vif6_table[iter->ct]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 393 | } |
| 394 | return NULL; |
| 395 | } |
| 396 | |
| 397 | static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) |
| 398 | __acquires(mrt_lock) |
| 399 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 400 | struct ipmr_vif_iter *iter = seq->private; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 401 | struct net *net = seq_file_net(seq); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 402 | struct mr6_table *mrt; |
| 403 | |
| 404 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
| 405 | if (mrt == NULL) |
| 406 | return ERR_PTR(-ENOENT); |
| 407 | |
| 408 | iter->mrt = mrt; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 409 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 410 | read_lock(&mrt_lock); |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 411 | return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) |
| 412 | : SEQ_START_TOKEN; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 416 | { |
| 417 | struct ipmr_vif_iter *iter = seq->private; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 418 | struct net *net = seq_file_net(seq); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 419 | struct mr6_table *mrt = iter->mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 420 | |
| 421 | ++*pos; |
| 422 | if (v == SEQ_START_TOKEN) |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 423 | return ip6mr_vif_seq_idx(net, iter, 0); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 424 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 425 | while (++iter->ct < mrt->maxvif) { |
| 426 | if (!MIF_EXISTS(mrt, iter->ct)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 427 | continue; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 428 | return &mrt->vif6_table[iter->ct]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 429 | } |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) |
| 434 | __releases(mrt_lock) |
| 435 | { |
| 436 | read_unlock(&mrt_lock); |
| 437 | } |
| 438 | |
| 439 | static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) |
| 440 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 441 | struct ipmr_vif_iter *iter = seq->private; |
| 442 | struct mr6_table *mrt = iter->mrt; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 443 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 444 | if (v == SEQ_START_TOKEN) { |
| 445 | seq_puts(seq, |
| 446 | "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); |
| 447 | } else { |
| 448 | const struct mif_device *vif = v; |
| 449 | const char *name = vif->dev ? vif->dev->name : "none"; |
| 450 | |
| 451 | seq_printf(seq, |
Al Viro | d430a22 | 2008-06-02 10:59:02 +0100 | [diff] [blame] | 452 | "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 453 | vif - mrt->vif6_table, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 454 | name, vif->bytes_in, vif->pkt_in, |
| 455 | vif->bytes_out, vif->pkt_out, |
| 456 | vif->flags); |
| 457 | } |
| 458 | return 0; |
| 459 | } |
| 460 | |
Stephen Hemminger | 98147d5 | 2009-09-01 19:25:02 +0000 | [diff] [blame] | 461 | static const struct seq_operations ip6mr_vif_seq_ops = { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 462 | .start = ip6mr_vif_seq_start, |
| 463 | .next = ip6mr_vif_seq_next, |
| 464 | .stop = ip6mr_vif_seq_stop, |
| 465 | .show = ip6mr_vif_seq_show, |
| 466 | }; |
| 467 | |
| 468 | static int ip6mr_vif_open(struct inode *inode, struct file *file) |
| 469 | { |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 470 | return seq_open_net(inode, file, &ip6mr_vif_seq_ops, |
| 471 | sizeof(struct ipmr_vif_iter)); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 472 | } |
| 473 | |
Stephen Hemminger | 5ca1b99 | 2009-09-01 19:25:05 +0000 | [diff] [blame] | 474 | static const struct file_operations ip6mr_vif_fops = { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 475 | .owner = THIS_MODULE, |
| 476 | .open = ip6mr_vif_open, |
| 477 | .read = seq_read, |
| 478 | .llseek = seq_lseek, |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 479 | .release = seq_release_net, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 480 | }; |
| 481 | |
| 482 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) |
| 483 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 484 | struct ipmr_mfc_iter *it = seq->private; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 485 | struct net *net = seq_file_net(seq); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 486 | struct mr6_table *mrt; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 487 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 488 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
| 489 | if (mrt == NULL) |
| 490 | return ERR_PTR(-ENOENT); |
| 491 | |
| 492 | it->mrt = mrt; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 493 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
| 494 | : SEQ_START_TOKEN; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 498 | { |
| 499 | struct mfc6_cache *mfc = v; |
| 500 | struct ipmr_mfc_iter *it = seq->private; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 501 | struct net *net = seq_file_net(seq); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 502 | struct mr6_table *mrt = it->mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 503 | |
| 504 | ++*pos; |
| 505 | |
| 506 | if (v == SEQ_START_TOKEN) |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 507 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 508 | |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 509 | if (mfc->list.next != it->cache) |
| 510 | return list_entry(mfc->list.next, struct mfc6_cache, list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 511 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 512 | if (it->cache == &mrt->mfc6_unres_queue) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 513 | goto end_of_list; |
| 514 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 515 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 516 | |
Benjamin Thery | 4a6258a | 2008-12-10 16:24:07 -0800 | [diff] [blame] | 517 | while (++it->ct < MFC6_LINES) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 518 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 519 | if (list_empty(it->cache)) |
| 520 | continue; |
| 521 | return list_first_entry(it->cache, struct mfc6_cache, list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | /* exhausted cache_array, show unresolved */ |
| 525 | read_unlock(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 526 | it->cache = &mrt->mfc6_unres_queue; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 527 | it->ct = 0; |
| 528 | |
| 529 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 530 | if (!list_empty(it->cache)) |
| 531 | return list_first_entry(it->cache, struct mfc6_cache, list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 532 | |
| 533 | end_of_list: |
| 534 | spin_unlock_bh(&mfc_unres_lock); |
| 535 | it->cache = NULL; |
| 536 | |
| 537 | return NULL; |
| 538 | } |
| 539 | |
| 540 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) |
| 541 | { |
| 542 | struct ipmr_mfc_iter *it = seq->private; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 543 | struct mr6_table *mrt = it->mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 544 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 545 | if (it->cache == &mrt->mfc6_unres_queue) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 546 | spin_unlock_bh(&mfc_unres_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 547 | else if (it->cache == mrt->mfc6_cache_array) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 548 | read_unlock(&mrt_lock); |
| 549 | } |
| 550 | |
| 551 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) |
| 552 | { |
| 553 | int n; |
| 554 | |
| 555 | if (v == SEQ_START_TOKEN) { |
| 556 | seq_puts(seq, |
| 557 | "Group " |
| 558 | "Origin " |
| 559 | "Iif Pkts Bytes Wrong Oifs\n"); |
| 560 | } else { |
| 561 | const struct mfc6_cache *mfc = v; |
| 562 | const struct ipmr_mfc_iter *it = seq->private; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 563 | struct mr6_table *mrt = it->mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 564 | |
Benjamin Thery | 999890b | 2008-12-03 22:22:16 -0800 | [diff] [blame] | 565 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
Harvey Harrison | 0c6ce78 | 2008-10-28 16:09:23 -0700 | [diff] [blame] | 566 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 567 | mfc->mf6c_parent); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 568 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 569 | if (it->cache != &mrt->mfc6_unres_queue) { |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 570 | seq_printf(seq, " %8lu %8lu %8lu", |
| 571 | mfc->mfc_un.res.pkt, |
| 572 | mfc->mfc_un.res.bytes, |
| 573 | mfc->mfc_un.res.wrong_if); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 574 | for (n = mfc->mfc_un.res.minvif; |
| 575 | n < mfc->mfc_un.res.maxvif; n++) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 576 | if (MIF_EXISTS(mrt, n) && |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 577 | mfc->mfc_un.res.ttls[n] < 255) |
| 578 | seq_printf(seq, |
| 579 | " %2d:%-3d", |
| 580 | n, mfc->mfc_un.res.ttls[n]); |
| 581 | } |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 582 | } else { |
| 583 | /* unresolved mfc_caches don't contain |
| 584 | * pkt, bytes and wrong_if values |
| 585 | */ |
| 586 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 587 | } |
| 588 | seq_putc(seq, '\n'); |
| 589 | } |
| 590 | return 0; |
| 591 | } |
| 592 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 593 | static const struct seq_operations ipmr_mfc_seq_ops = { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 594 | .start = ipmr_mfc_seq_start, |
| 595 | .next = ipmr_mfc_seq_next, |
| 596 | .stop = ipmr_mfc_seq_stop, |
| 597 | .show = ipmr_mfc_seq_show, |
| 598 | }; |
| 599 | |
| 600 | static int ipmr_mfc_open(struct inode *inode, struct file *file) |
| 601 | { |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 602 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
| 603 | sizeof(struct ipmr_mfc_iter)); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 604 | } |
| 605 | |
Stephen Hemminger | 5ca1b99 | 2009-09-01 19:25:05 +0000 | [diff] [blame] | 606 | static const struct file_operations ip6mr_mfc_fops = { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 607 | .owner = THIS_MODULE, |
| 608 | .open = ipmr_mfc_open, |
| 609 | .read = seq_read, |
| 610 | .llseek = seq_lseek, |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 611 | .release = seq_release_net, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 612 | }; |
| 613 | #endif |
| 614 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 615 | #ifdef CONFIG_IPV6_PIMSM_V2 |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 616 | |
| 617 | static int pim6_rcv(struct sk_buff *skb) |
| 618 | { |
| 619 | struct pimreghdr *pim; |
| 620 | struct ipv6hdr *encap; |
| 621 | struct net_device *reg_dev = NULL; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 622 | struct net *net = dev_net(skb->dev); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 623 | struct mr6_table *mrt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 624 | struct flowi6 fl6 = { |
| 625 | .flowi6_iif = skb->dev->ifindex, |
| 626 | .flowi6_mark = skb->mark, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 627 | }; |
| 628 | int reg_vif_num; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 629 | |
| 630 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) |
| 631 | goto drop; |
| 632 | |
| 633 | pim = (struct pimreghdr *)skb_transport_header(skb); |
| 634 | if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) || |
| 635 | (pim->flags & PIM_NULL_REGISTER) || |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 636 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
| 637 | sizeof(*pim), IPPROTO_PIM, |
| 638 | csum_partial((void *)pim, sizeof(*pim), 0)) && |
Al Viro | ec6b486 | 2008-04-26 22:28:58 -0700 | [diff] [blame] | 639 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 640 | goto drop; |
| 641 | |
| 642 | /* check if the inner packet is destined to mcast group */ |
| 643 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + |
| 644 | sizeof(*pim)); |
| 645 | |
| 646 | if (!ipv6_addr_is_multicast(&encap->daddr) || |
| 647 | encap->payload_len == 0 || |
| 648 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) |
| 649 | goto drop; |
| 650 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 651 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 652 | goto drop; |
| 653 | reg_vif_num = mrt->mroute_reg_vif_num; |
| 654 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 655 | read_lock(&mrt_lock); |
| 656 | if (reg_vif_num >= 0) |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 657 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 658 | if (reg_dev) |
| 659 | dev_hold(reg_dev); |
| 660 | read_unlock(&mrt_lock); |
| 661 | |
| 662 | if (reg_dev == NULL) |
| 663 | goto drop; |
| 664 | |
| 665 | skb->mac_header = skb->network_header; |
| 666 | skb_pull(skb, (u8 *)encap - skb->data); |
| 667 | skb_reset_network_header(skb); |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 668 | skb->protocol = htons(ETH_P_IPV6); |
Cesar Eduardo Barros | 3e49e6d | 2011-03-26 05:10:30 +0000 | [diff] [blame] | 669 | skb->ip_summed = CHECKSUM_NONE; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 670 | skb->pkt_type = PACKET_HOST; |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 671 | |
| 672 | skb_tunnel_rx(skb, reg_dev); |
| 673 | |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 674 | netif_rx(skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 675 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 676 | dev_put(reg_dev); |
| 677 | return 0; |
| 678 | drop: |
| 679 | kfree_skb(skb); |
| 680 | return 0; |
| 681 | } |
| 682 | |
Alexey Dobriyan | 41135cc | 2009-09-14 12:22:28 +0000 | [diff] [blame] | 683 | static const struct inet6_protocol pim6_protocol = { |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 684 | .handler = pim6_rcv, |
| 685 | }; |
| 686 | |
| 687 | /* Service routines creating virtual interfaces: PIMREG */ |
| 688 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 689 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
| 690 | struct net_device *dev) |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 691 | { |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 692 | struct net *net = dev_net(dev); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 693 | struct mr6_table *mrt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 694 | struct flowi6 fl6 = { |
| 695 | .flowi6_oif = dev->ifindex, |
| 696 | .flowi6_iif = skb->skb_iif, |
| 697 | .flowi6_mark = skb->mark, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 698 | }; |
| 699 | int err; |
| 700 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 701 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
Ben Greear | 67928c4 | 2011-09-23 13:11:01 +0000 | [diff] [blame] | 702 | if (err < 0) { |
| 703 | kfree_skb(skb); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 704 | return err; |
Ben Greear | 67928c4 | 2011-09-23 13:11:01 +0000 | [diff] [blame] | 705 | } |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 706 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 707 | read_lock(&mrt_lock); |
Pavel Emelyanov | dc58c78 | 2008-05-21 14:17:54 -0700 | [diff] [blame] | 708 | dev->stats.tx_bytes += skb->len; |
| 709 | dev->stats.tx_packets++; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 710 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 711 | read_unlock(&mrt_lock); |
| 712 | kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 713 | return NETDEV_TX_OK; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 714 | } |
| 715 | |
Stephen Hemminger | 007c383 | 2008-11-20 20:28:35 -0800 | [diff] [blame] | 716 | static const struct net_device_ops reg_vif_netdev_ops = { |
| 717 | .ndo_start_xmit = reg_vif_xmit, |
| 718 | }; |
| 719 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 720 | static void reg_vif_setup(struct net_device *dev) |
| 721 | { |
| 722 | dev->type = ARPHRD_PIMREG; |
| 723 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; |
| 724 | dev->flags = IFF_NOARP; |
Stephen Hemminger | 007c383 | 2008-11-20 20:28:35 -0800 | [diff] [blame] | 725 | dev->netdev_ops = ®_vif_netdev_ops; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 726 | dev->destructor = free_netdev; |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 727 | dev->features |= NETIF_F_NETNS_LOCAL; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 728 | } |
| 729 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 730 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 731 | { |
| 732 | struct net_device *dev; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 733 | char name[IFNAMSIZ]; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 734 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 735 | if (mrt->id == RT6_TABLE_DFLT) |
| 736 | sprintf(name, "pim6reg"); |
| 737 | else |
| 738 | sprintf(name, "pim6reg%u", mrt->id); |
| 739 | |
| 740 | dev = alloc_netdev(0, name, reg_vif_setup); |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 741 | if (dev == NULL) |
| 742 | return NULL; |
| 743 | |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 744 | dev_net_set(dev, net); |
| 745 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 746 | if (register_netdevice(dev)) { |
| 747 | free_netdev(dev); |
| 748 | return NULL; |
| 749 | } |
| 750 | dev->iflink = 0; |
| 751 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 752 | if (dev_open(dev)) |
| 753 | goto failure; |
| 754 | |
Wang Chen | 7af3db7 | 2008-07-14 20:54:54 -0700 | [diff] [blame] | 755 | dev_hold(dev); |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 756 | return dev; |
| 757 | |
| 758 | failure: |
| 759 | /* allow the register to be completed before unregistering. */ |
| 760 | rtnl_unlock(); |
| 761 | rtnl_lock(); |
| 762 | |
| 763 | unregister_netdevice(dev); |
| 764 | return NULL; |
| 765 | } |
| 766 | #endif |
| 767 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 768 | /* |
| 769 | * Delete a VIF entry |
| 770 | */ |
| 771 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 772 | static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 773 | { |
| 774 | struct mif_device *v; |
| 775 | struct net_device *dev; |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 776 | struct inet6_dev *in6_dev; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 777 | |
| 778 | if (vifi < 0 || vifi >= mrt->maxvif) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 779 | return -EADDRNOTAVAIL; |
| 780 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 781 | v = &mrt->vif6_table[vifi]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 782 | |
| 783 | write_lock_bh(&mrt_lock); |
| 784 | dev = v->dev; |
| 785 | v->dev = NULL; |
| 786 | |
| 787 | if (!dev) { |
| 788 | write_unlock_bh(&mrt_lock); |
| 789 | return -EADDRNOTAVAIL; |
| 790 | } |
| 791 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 792 | #ifdef CONFIG_IPV6_PIMSM_V2 |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 793 | if (vifi == mrt->mroute_reg_vif_num) |
| 794 | mrt->mroute_reg_vif_num = -1; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 795 | #endif |
| 796 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 797 | if (vifi + 1 == mrt->maxvif) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 798 | int tmp; |
| 799 | for (tmp = vifi - 1; tmp >= 0; tmp--) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 800 | if (MIF_EXISTS(mrt, tmp)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 801 | break; |
| 802 | } |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 803 | mrt->maxvif = tmp + 1; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 804 | } |
| 805 | |
| 806 | write_unlock_bh(&mrt_lock); |
| 807 | |
| 808 | dev_set_allmulti(dev, -1); |
| 809 | |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 810 | in6_dev = __in6_dev_get(dev); |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 811 | if (in6_dev) { |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 812 | in6_dev->cnf.mc_forwarding--; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 813 | inet6_netconf_notify_devconf(dev_net(dev), |
| 814 | NETCONFA_MC_FORWARDING, |
| 815 | dev->ifindex, &in6_dev->cnf); |
| 816 | } |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 817 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 818 | if (v->flags & MIFF_REGISTER) |
Eric Dumazet | c871e66 | 2009-10-28 04:48:11 +0000 | [diff] [blame] | 819 | unregister_netdevice_queue(dev, head); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 820 | |
| 821 | dev_put(dev); |
| 822 | return 0; |
| 823 | } |
| 824 | |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 825 | static inline void ip6mr_cache_free(struct mfc6_cache *c) |
| 826 | { |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 827 | kmem_cache_free(mrt_cachep, c); |
| 828 | } |
| 829 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 830 | /* Destroy an unresolved cache entry, killing queued skbs |
| 831 | and reporting error to netlink readers. |
| 832 | */ |
| 833 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 834 | static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 835 | { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 836 | struct net *net = read_pnet(&mrt->net); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 837 | struct sk_buff *skb; |
| 838 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 839 | atomic_dec(&mrt->cache_resolve_queue_len); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 840 | |
| 841 | while((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { |
| 842 | if (ipv6_hdr(skb)->version == 0) { |
| 843 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); |
| 844 | nlh->nlmsg_type = NLMSG_ERROR; |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 845 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 846 | skb_trim(skb, nlh->nlmsg_len); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 847 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 848 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 849 | } else |
| 850 | kfree_skb(skb); |
| 851 | } |
| 852 | |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 853 | ip6mr_cache_free(c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 857 | /* Timer process for all the unresolved queue. */ |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 858 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 859 | static void ipmr_do_expire_process(struct mr6_table *mrt) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 860 | { |
| 861 | unsigned long now = jiffies; |
| 862 | unsigned long expires = 10 * HZ; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 863 | struct mfc6_cache *c, *next; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 864 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 865 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 866 | if (time_after(c->mfc_un.unres.expires, now)) { |
| 867 | /* not yet... */ |
| 868 | unsigned long interval = c->mfc_un.unres.expires - now; |
| 869 | if (interval < expires) |
| 870 | expires = interval; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 871 | continue; |
| 872 | } |
| 873 | |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 874 | list_del(&c->list); |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 875 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 876 | ip6mr_destroy_unres(mrt, c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 877 | } |
| 878 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 879 | if (!list_empty(&mrt->mfc6_unres_queue)) |
| 880 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 881 | } |
| 882 | |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 883 | static void ipmr_expire_process(unsigned long arg) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 884 | { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 885 | struct mr6_table *mrt = (struct mr6_table *)arg; |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 886 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 887 | if (!spin_trylock(&mfc_unres_lock)) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 888 | mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 889 | return; |
| 890 | } |
| 891 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 892 | if (!list_empty(&mrt->mfc6_unres_queue)) |
| 893 | ipmr_do_expire_process(mrt); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 894 | |
| 895 | spin_unlock(&mfc_unres_lock); |
| 896 | } |
| 897 | |
| 898 | /* Fill oifs list. It is called under write locked mrt_lock. */ |
| 899 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 900 | static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, |
Patrick McHardy | b5aa30b | 2010-05-11 14:40:50 +0200 | [diff] [blame] | 901 | unsigned char *ttls) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 902 | { |
| 903 | int vifi; |
| 904 | |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 905 | cache->mfc_un.res.minvif = MAXMIFS; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 906 | cache->mfc_un.res.maxvif = 0; |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 907 | memset(cache->mfc_un.res.ttls, 255, MAXMIFS); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 908 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 909 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
| 910 | if (MIF_EXISTS(mrt, vifi) && |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 911 | ttls[vifi] && ttls[vifi] < 255) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 912 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
| 913 | if (cache->mfc_un.res.minvif > vifi) |
| 914 | cache->mfc_un.res.minvif = vifi; |
| 915 | if (cache->mfc_un.res.maxvif <= vifi) |
| 916 | cache->mfc_un.res.maxvif = vifi + 1; |
| 917 | } |
| 918 | } |
| 919 | } |
| 920 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 921 | static int mif6_add(struct net *net, struct mr6_table *mrt, |
| 922 | struct mif6ctl *vifc, int mrtsock) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 923 | { |
| 924 | int vifi = vifc->mif6c_mifi; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 925 | struct mif_device *v = &mrt->vif6_table[vifi]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 926 | struct net_device *dev; |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 927 | struct inet6_dev *in6_dev; |
Wang Chen | 5ae7b44 | 2008-07-14 20:54:23 -0700 | [diff] [blame] | 928 | int err; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 929 | |
| 930 | /* Is vif busy ? */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 931 | if (MIF_EXISTS(mrt, vifi)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 932 | return -EADDRINUSE; |
| 933 | |
| 934 | switch (vifc->mif6c_flags) { |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 935 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 936 | case MIFF_REGISTER: |
| 937 | /* |
| 938 | * Special Purpose VIF in PIM |
| 939 | * All the packets will be sent to the daemon |
| 940 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 941 | if (mrt->mroute_reg_vif_num >= 0) |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 942 | return -EADDRINUSE; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 943 | dev = ip6mr_reg_vif(net, mrt); |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 944 | if (!dev) |
| 945 | return -ENOBUFS; |
Wang Chen | 5ae7b44 | 2008-07-14 20:54:23 -0700 | [diff] [blame] | 946 | err = dev_set_allmulti(dev, 1); |
| 947 | if (err) { |
| 948 | unregister_netdevice(dev); |
Wang Chen | 7af3db7 | 2008-07-14 20:54:54 -0700 | [diff] [blame] | 949 | dev_put(dev); |
Wang Chen | 5ae7b44 | 2008-07-14 20:54:23 -0700 | [diff] [blame] | 950 | return err; |
| 951 | } |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 952 | break; |
| 953 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 954 | case 0: |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 955 | dev = dev_get_by_index(net, vifc->mif6c_pifi); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 956 | if (!dev) |
| 957 | return -EADDRNOTAVAIL; |
Wang Chen | 5ae7b44 | 2008-07-14 20:54:23 -0700 | [diff] [blame] | 958 | err = dev_set_allmulti(dev, 1); |
Wang Chen | 7af3db7 | 2008-07-14 20:54:54 -0700 | [diff] [blame] | 959 | if (err) { |
| 960 | dev_put(dev); |
Wang Chen | 5ae7b44 | 2008-07-14 20:54:23 -0700 | [diff] [blame] | 961 | return err; |
Wang Chen | 7af3db7 | 2008-07-14 20:54:54 -0700 | [diff] [blame] | 962 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 963 | break; |
| 964 | default: |
| 965 | return -EINVAL; |
| 966 | } |
| 967 | |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 968 | in6_dev = __in6_dev_get(dev); |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 969 | if (in6_dev) { |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 970 | in6_dev->cnf.mc_forwarding++; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 971 | inet6_netconf_notify_devconf(dev_net(dev), |
| 972 | NETCONFA_MC_FORWARDING, |
| 973 | dev->ifindex, &in6_dev->cnf); |
| 974 | } |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 975 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 976 | /* |
| 977 | * Fill in the VIF structures |
| 978 | */ |
| 979 | v->rate_limit = vifc->vifc_rate_limit; |
| 980 | v->flags = vifc->mif6c_flags; |
| 981 | if (!mrtsock) |
| 982 | v->flags |= VIFF_STATIC; |
| 983 | v->threshold = vifc->vifc_threshold; |
| 984 | v->bytes_in = 0; |
| 985 | v->bytes_out = 0; |
| 986 | v->pkt_in = 0; |
| 987 | v->pkt_out = 0; |
| 988 | v->link = dev->ifindex; |
| 989 | if (v->flags & MIFF_REGISTER) |
| 990 | v->link = dev->iflink; |
| 991 | |
| 992 | /* And finish update writing critical data */ |
| 993 | write_lock_bh(&mrt_lock); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 994 | v->dev = dev; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 995 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 996 | if (v->flags & MIFF_REGISTER) |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 997 | mrt->mroute_reg_vif_num = vifi; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 998 | #endif |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 999 | if (vifi + 1 > mrt->maxvif) |
| 1000 | mrt->maxvif = vifi + 1; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1001 | write_unlock_bh(&mrt_lock); |
| 1002 | return 0; |
| 1003 | } |
| 1004 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1005 | static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1006 | const struct in6_addr *origin, |
| 1007 | const struct in6_addr *mcastgrp) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1008 | { |
| 1009 | int line = MFC6_HASH(mcastgrp, origin); |
| 1010 | struct mfc6_cache *c; |
| 1011 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1012 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1013 | if (ipv6_addr_equal(&c->mf6c_origin, origin) && |
| 1014 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1015 | return c; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1016 | } |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1017 | return NULL; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1018 | } |
| 1019 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1020 | /* Look for a (*,*,oif) entry */ |
| 1021 | static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt, |
| 1022 | mifi_t mifi) |
| 1023 | { |
| 1024 | int line = MFC6_HASH(&in6addr_any, &in6addr_any); |
| 1025 | struct mfc6_cache *c; |
| 1026 | |
| 1027 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) |
| 1028 | if (ipv6_addr_any(&c->mf6c_origin) && |
| 1029 | ipv6_addr_any(&c->mf6c_mcastgrp) && |
| 1030 | (c->mfc_un.res.ttls[mifi] < 255)) |
| 1031 | return c; |
| 1032 | |
| 1033 | return NULL; |
| 1034 | } |
| 1035 | |
| 1036 | /* Look for a (*,G) entry */ |
| 1037 | static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt, |
| 1038 | struct in6_addr *mcastgrp, |
| 1039 | mifi_t mifi) |
| 1040 | { |
| 1041 | int line = MFC6_HASH(mcastgrp, &in6addr_any); |
| 1042 | struct mfc6_cache *c, *proxy; |
| 1043 | |
| 1044 | if (ipv6_addr_any(mcastgrp)) |
| 1045 | goto skip; |
| 1046 | |
| 1047 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) |
| 1048 | if (ipv6_addr_any(&c->mf6c_origin) && |
| 1049 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) { |
| 1050 | if (c->mfc_un.res.ttls[mifi] < 255) |
| 1051 | return c; |
| 1052 | |
| 1053 | /* It's ok if the mifi is part of the static tree */ |
| 1054 | proxy = ip6mr_cache_find_any_parent(mrt, |
| 1055 | c->mf6c_parent); |
| 1056 | if (proxy && proxy->mfc_un.res.ttls[mifi] < 255) |
| 1057 | return c; |
| 1058 | } |
| 1059 | |
| 1060 | skip: |
| 1061 | return ip6mr_cache_find_any_parent(mrt, mifi); |
| 1062 | } |
| 1063 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1064 | /* |
| 1065 | * Allocate a multicast cache entry |
| 1066 | */ |
Patrick McHardy | b5aa30b | 2010-05-11 14:40:50 +0200 | [diff] [blame] | 1067 | static struct mfc6_cache *ip6mr_cache_alloc(void) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1068 | { |
Joe Perches | 36cbac5 | 2008-12-03 22:27:25 -0800 | [diff] [blame] | 1069 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1070 | if (c == NULL) |
| 1071 | return NULL; |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 1072 | c->mfc_un.res.minvif = MAXMIFS; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1073 | return c; |
| 1074 | } |
| 1075 | |
Patrick McHardy | b5aa30b | 2010-05-11 14:40:50 +0200 | [diff] [blame] | 1076 | static struct mfc6_cache *ip6mr_cache_alloc_unres(void) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1077 | { |
Joe Perches | 36cbac5 | 2008-12-03 22:27:25 -0800 | [diff] [blame] | 1078 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1079 | if (c == NULL) |
| 1080 | return NULL; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1081 | skb_queue_head_init(&c->mfc_un.unres.unresolved); |
| 1082 | c->mfc_un.unres.expires = jiffies + 10 * HZ; |
| 1083 | return c; |
| 1084 | } |
| 1085 | |
| 1086 | /* |
| 1087 | * A cache entry has gone into a resolved state from queued |
| 1088 | */ |
| 1089 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1090 | static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt, |
| 1091 | struct mfc6_cache *uc, struct mfc6_cache *c) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1092 | { |
| 1093 | struct sk_buff *skb; |
| 1094 | |
| 1095 | /* |
| 1096 | * Play the pending entries through our router |
| 1097 | */ |
| 1098 | |
| 1099 | while((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
| 1100 | if (ipv6_hdr(skb)->version == 0) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1101 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); |
| 1102 | |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 1103 | if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
YOSHIFUJI Hideaki | 549e028 | 2008-04-05 22:17:39 +0900 | [diff] [blame] | 1104 | nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1105 | } else { |
| 1106 | nlh->nlmsg_type = NLMSG_ERROR; |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 1107 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1108 | skb_trim(skb, nlh->nlmsg_len); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 1109 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1110 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1111 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1112 | } else |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1113 | ip6_mr_forward(net, mrt, skb, c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | /* |
| 1118 | * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd |
| 1119 | * expects the following bizarre scheme. |
| 1120 | * |
| 1121 | * Called under mrt_lock. |
| 1122 | */ |
| 1123 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1124 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
| 1125 | mifi_t mifi, int assert) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1126 | { |
| 1127 | struct sk_buff *skb; |
| 1128 | struct mrt6msg *msg; |
| 1129 | int ret; |
| 1130 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1131 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1132 | if (assert == MRT6MSG_WHOLEPKT) |
| 1133 | skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt) |
| 1134 | +sizeof(*msg)); |
| 1135 | else |
| 1136 | #endif |
| 1137 | skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1138 | |
| 1139 | if (!skb) |
| 1140 | return -ENOBUFS; |
| 1141 | |
| 1142 | /* I suppose that internal messages |
| 1143 | * do not require checksums */ |
| 1144 | |
| 1145 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1146 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1147 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1148 | if (assert == MRT6MSG_WHOLEPKT) { |
| 1149 | /* Ugly, but we have no choice with this interface. |
| 1150 | Duplicate old header, fix length etc. |
| 1151 | And all this only to mangle msg->im6_msgtype and |
| 1152 | to set msg->im6_mbz to "mbz" :-) |
| 1153 | */ |
| 1154 | skb_push(skb, -skb_network_offset(pkt)); |
| 1155 | |
| 1156 | skb_push(skb, sizeof(*msg)); |
| 1157 | skb_reset_transport_header(skb); |
| 1158 | msg = (struct mrt6msg *)skb_transport_header(skb); |
| 1159 | msg->im6_mbz = 0; |
| 1160 | msg->im6_msgtype = MRT6MSG_WHOLEPKT; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1161 | msg->im6_mif = mrt->mroute_reg_vif_num; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1162 | msg->im6_pad = 0; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1163 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
| 1164 | msg->im6_dst = ipv6_hdr(pkt)->daddr; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1165 | |
| 1166 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1167 | } else |
| 1168 | #endif |
| 1169 | { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1170 | /* |
| 1171 | * Copy the IP header |
| 1172 | */ |
| 1173 | |
| 1174 | skb_put(skb, sizeof(struct ipv6hdr)); |
| 1175 | skb_reset_network_header(skb); |
| 1176 | skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr)); |
| 1177 | |
| 1178 | /* |
| 1179 | * Add our header |
| 1180 | */ |
| 1181 | skb_put(skb, sizeof(*msg)); |
| 1182 | skb_reset_transport_header(skb); |
| 1183 | msg = (struct mrt6msg *)skb_transport_header(skb); |
| 1184 | |
| 1185 | msg->im6_mbz = 0; |
| 1186 | msg->im6_msgtype = assert; |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 1187 | msg->im6_mif = mifi; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1188 | msg->im6_pad = 0; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1189 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
| 1190 | msg->im6_dst = ipv6_hdr(pkt)->daddr; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1191 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1192 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1193 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1194 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1195 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1196 | if (mrt->mroute6_sk == NULL) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1197 | kfree_skb(skb); |
| 1198 | return -EINVAL; |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * Deliver to user space multicast routing algorithms |
| 1203 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1204 | ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); |
Benjamin Thery | bd91b8b | 2008-12-10 16:07:08 -0800 | [diff] [blame] | 1205 | if (ret < 0) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1206 | net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1207 | kfree_skb(skb); |
| 1208 | } |
| 1209 | |
| 1210 | return ret; |
| 1211 | } |
| 1212 | |
| 1213 | /* |
| 1214 | * Queue a packet for resolution. It gets locked cache entry! |
| 1215 | */ |
| 1216 | |
| 1217 | static int |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1218 | ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1219 | { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1220 | bool found = false; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1221 | int err; |
| 1222 | struct mfc6_cache *c; |
| 1223 | |
| 1224 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1225 | list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 1226 | if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1227 | ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { |
| 1228 | found = true; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1229 | break; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1230 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1231 | } |
| 1232 | |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1233 | if (!found) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1234 | /* |
| 1235 | * Create a new entry if allowable |
| 1236 | */ |
| 1237 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1238 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
Patrick McHardy | b5aa30b | 2010-05-11 14:40:50 +0200 | [diff] [blame] | 1239 | (c = ip6mr_cache_alloc_unres()) == NULL) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1240 | spin_unlock_bh(&mfc_unres_lock); |
| 1241 | |
| 1242 | kfree_skb(skb); |
| 1243 | return -ENOBUFS; |
| 1244 | } |
| 1245 | |
| 1246 | /* |
| 1247 | * Fill in the new cache entry |
| 1248 | */ |
| 1249 | c->mf6c_parent = -1; |
| 1250 | c->mf6c_origin = ipv6_hdr(skb)->saddr; |
| 1251 | c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; |
| 1252 | |
| 1253 | /* |
| 1254 | * Reflect first query at pim6sd |
| 1255 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1256 | err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1257 | if (err < 0) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1258 | /* If the report failed throw the cache entry |
| 1259 | out - Brad Parker |
| 1260 | */ |
| 1261 | spin_unlock_bh(&mfc_unres_lock); |
| 1262 | |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 1263 | ip6mr_cache_free(c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1264 | kfree_skb(skb); |
| 1265 | return err; |
| 1266 | } |
| 1267 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1268 | atomic_inc(&mrt->cache_resolve_queue_len); |
| 1269 | list_add(&c->list, &mrt->mfc6_unres_queue); |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1270 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1271 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1272 | ipmr_do_expire_process(mrt); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | /* |
| 1276 | * See if we can append the packet |
| 1277 | */ |
| 1278 | if (c->mfc_un.unres.unresolved.qlen > 3) { |
| 1279 | kfree_skb(skb); |
| 1280 | err = -ENOBUFS; |
| 1281 | } else { |
| 1282 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); |
| 1283 | err = 0; |
| 1284 | } |
| 1285 | |
| 1286 | spin_unlock_bh(&mfc_unres_lock); |
| 1287 | return err; |
| 1288 | } |
| 1289 | |
| 1290 | /* |
| 1291 | * MFC6 cache manipulation by user space |
| 1292 | */ |
| 1293 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1294 | static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, |
| 1295 | int parent) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1296 | { |
| 1297 | int line; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1298 | struct mfc6_cache *c, *next; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1299 | |
| 1300 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); |
| 1301 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1302 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1303 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1304 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
| 1305 | &mfc->mf6cc_mcastgrp.sin6_addr) && |
| 1306 | (parent == -1 || parent == c->mf6c_parent)) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1307 | write_lock_bh(&mrt_lock); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1308 | list_del(&c->list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1309 | write_unlock_bh(&mrt_lock); |
| 1310 | |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1311 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 1312 | ip6mr_cache_free(c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1313 | return 0; |
| 1314 | } |
| 1315 | } |
| 1316 | return -ENOENT; |
| 1317 | } |
| 1318 | |
| 1319 | static int ip6mr_device_event(struct notifier_block *this, |
| 1320 | unsigned long event, void *ptr) |
| 1321 | { |
| 1322 | struct net_device *dev = ptr; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1323 | struct net *net = dev_net(dev); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1324 | struct mr6_table *mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1325 | struct mif_device *v; |
| 1326 | int ct; |
Eric Dumazet | c871e66 | 2009-10-28 04:48:11 +0000 | [diff] [blame] | 1327 | LIST_HEAD(list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1328 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1329 | if (event != NETDEV_UNREGISTER) |
| 1330 | return NOTIFY_DONE; |
| 1331 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1332 | ip6mr_for_each_table(mrt, net) { |
| 1333 | v = &mrt->vif6_table[0]; |
| 1334 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { |
| 1335 | if (v->dev == dev) |
| 1336 | mif6_delete(mrt, ct, &list); |
| 1337 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1338 | } |
Eric Dumazet | c871e66 | 2009-10-28 04:48:11 +0000 | [diff] [blame] | 1339 | unregister_netdevice_many(&list); |
| 1340 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1341 | return NOTIFY_DONE; |
| 1342 | } |
| 1343 | |
| 1344 | static struct notifier_block ip6_mr_notifier = { |
| 1345 | .notifier_call = ip6mr_device_event |
| 1346 | }; |
| 1347 | |
| 1348 | /* |
| 1349 | * Setup for IP multicast routing |
| 1350 | */ |
| 1351 | |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1352 | static int __net_init ip6mr_net_init(struct net *net) |
| 1353 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1354 | int err; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1355 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1356 | err = ip6mr_rules_init(net); |
| 1357 | if (err < 0) |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1358 | goto fail; |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1359 | |
| 1360 | #ifdef CONFIG_PROC_FS |
| 1361 | err = -ENOMEM; |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 1362 | if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1363 | goto proc_vif_fail; |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 1364 | if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1365 | goto proc_cache_fail; |
| 1366 | #endif |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1367 | |
Benjamin Thery | 4a6258a | 2008-12-10 16:24:07 -0800 | [diff] [blame] | 1368 | return 0; |
| 1369 | |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1370 | #ifdef CONFIG_PROC_FS |
| 1371 | proc_cache_fail: |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 1372 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1373 | proc_vif_fail: |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1374 | ip6mr_rules_exit(net); |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1375 | #endif |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1376 | fail: |
| 1377 | return err; |
| 1378 | } |
| 1379 | |
| 1380 | static void __net_exit ip6mr_net_exit(struct net *net) |
| 1381 | { |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1382 | #ifdef CONFIG_PROC_FS |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 1383 | remove_proc_entry("ip6_mr_cache", net->proc_net); |
| 1384 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
Benjamin Thery | 8b90fc7 | 2008-12-10 16:29:48 -0800 | [diff] [blame] | 1385 | #endif |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1386 | ip6mr_rules_exit(net); |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1387 | } |
| 1388 | |
| 1389 | static struct pernet_operations ip6mr_net_ops = { |
| 1390 | .init = ip6mr_net_init, |
| 1391 | .exit = ip6mr_net_exit, |
| 1392 | }; |
| 1393 | |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1394 | int __init ip6_mr_init(void) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1395 | { |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1396 | int err; |
| 1397 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1398 | mrt_cachep = kmem_cache_create("ip6_mrt_cache", |
| 1399 | sizeof(struct mfc6_cache), |
| 1400 | 0, SLAB_HWCACHE_ALIGN, |
| 1401 | NULL); |
| 1402 | if (!mrt_cachep) |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1403 | return -ENOMEM; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1404 | |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1405 | err = register_pernet_subsys(&ip6mr_net_ops); |
| 1406 | if (err) |
| 1407 | goto reg_pernet_fail; |
| 1408 | |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1409 | err = register_netdevice_notifier(&ip6_mr_notifier); |
| 1410 | if (err) |
| 1411 | goto reg_notif_fail; |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 1412 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1413 | if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1414 | pr_err("%s: can't add PIM protocol\n", __func__); |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 1415 | err = -EAGAIN; |
| 1416 | goto add_proto_fail; |
| 1417 | } |
| 1418 | #endif |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 1419 | rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, |
| 1420 | ip6mr_rtm_dumproute, NULL); |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1421 | return 0; |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 1422 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1423 | add_proto_fail: |
| 1424 | unregister_netdevice_notifier(&ip6_mr_notifier); |
| 1425 | #endif |
Benjamin Thery | 87b30a6 | 2008-11-10 16:34:11 -0800 | [diff] [blame] | 1426 | reg_notif_fail: |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1427 | unregister_pernet_subsys(&ip6mr_net_ops); |
| 1428 | reg_pernet_fail: |
Benjamin Thery | 87b30a6 | 2008-11-10 16:34:11 -0800 | [diff] [blame] | 1429 | kmem_cache_destroy(mrt_cachep); |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1430 | return err; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1431 | } |
| 1432 | |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1433 | void ip6_mr_cleanup(void) |
| 1434 | { |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1435 | unregister_netdevice_notifier(&ip6_mr_notifier); |
Benjamin Thery | 4e16880 | 2008-12-10 16:15:08 -0800 | [diff] [blame] | 1436 | unregister_pernet_subsys(&ip6mr_net_ops); |
Wang Chen | 623d1a1 | 2008-07-03 12:13:30 +0800 | [diff] [blame] | 1437 | kmem_cache_destroy(mrt_cachep); |
| 1438 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1439 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1440 | static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1441 | struct mf6cctl *mfc, int mrtsock, int parent) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1442 | { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1443 | bool found = false; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1444 | int line; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1445 | struct mfc6_cache *uc, *c; |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 1446 | unsigned char ttls[MAXMIFS]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1447 | int i; |
| 1448 | |
Patrick McHardy | a50436f2 | 2010-03-17 06:04:14 +0000 | [diff] [blame] | 1449 | if (mfc->mf6cc_parent >= MAXMIFS) |
| 1450 | return -ENFILE; |
| 1451 | |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 1452 | memset(ttls, 255, MAXMIFS); |
| 1453 | for (i = 0; i < MAXMIFS; i++) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1454 | if (IF_ISSET(i, &mfc->mf6cc_ifset)) |
| 1455 | ttls[i] = 1; |
| 1456 | |
| 1457 | } |
| 1458 | |
| 1459 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); |
| 1460 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1461 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1462 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1463 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
| 1464 | &mfc->mf6cc_mcastgrp.sin6_addr) && |
| 1465 | (parent == -1 || parent == mfc->mf6cc_parent)) { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1466 | found = true; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1467 | break; |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1468 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1469 | } |
| 1470 | |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1471 | if (found) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1472 | write_lock_bh(&mrt_lock); |
| 1473 | c->mf6c_parent = mfc->mf6cc_parent; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1474 | ip6mr_update_thresholds(mrt, c, ttls); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1475 | if (!mrtsock) |
| 1476 | c->mfc_flags |= MFC_STATIC; |
| 1477 | write_unlock_bh(&mrt_lock); |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1478 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1479 | return 0; |
| 1480 | } |
| 1481 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1482 | if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && |
| 1483 | !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1484 | return -EINVAL; |
| 1485 | |
Patrick McHardy | b5aa30b | 2010-05-11 14:40:50 +0200 | [diff] [blame] | 1486 | c = ip6mr_cache_alloc(); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1487 | if (c == NULL) |
| 1488 | return -ENOMEM; |
| 1489 | |
| 1490 | c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; |
| 1491 | c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; |
| 1492 | c->mf6c_parent = mfc->mf6cc_parent; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1493 | ip6mr_update_thresholds(mrt, c, ttls); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1494 | if (!mrtsock) |
| 1495 | c->mfc_flags |= MFC_STATIC; |
| 1496 | |
| 1497 | write_lock_bh(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1498 | list_add(&c->list, &mrt->mfc6_cache_array[line]); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1499 | write_unlock_bh(&mrt_lock); |
| 1500 | |
| 1501 | /* |
| 1502 | * Check to see if we resolved a queued list. If so we |
| 1503 | * need to send on the frames and tidy up. |
| 1504 | */ |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1505 | found = false; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1506 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1507 | list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { |
Patrick McHardy | c476efb | 2010-05-11 14:40:48 +0200 | [diff] [blame] | 1508 | if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1509 | ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1510 | list_del(&uc->list); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1511 | atomic_dec(&mrt->cache_resolve_queue_len); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1512 | found = true; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1513 | break; |
| 1514 | } |
| 1515 | } |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1516 | if (list_empty(&mrt->mfc6_unres_queue)) |
| 1517 | del_timer(&mrt->ipmr_expire_timer); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1518 | spin_unlock_bh(&mfc_unres_lock); |
| 1519 | |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1520 | if (found) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1521 | ip6mr_cache_resolve(net, mrt, uc, c); |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 1522 | ip6mr_cache_free(uc); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1523 | } |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1524 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1525 | return 0; |
| 1526 | } |
| 1527 | |
| 1528 | /* |
| 1529 | * Close the multicast socket, and clear the vif tables etc |
| 1530 | */ |
| 1531 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1532 | static void mroute_clean_tables(struct mr6_table *mrt) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1533 | { |
| 1534 | int i; |
Eric Dumazet | c871e66 | 2009-10-28 04:48:11 +0000 | [diff] [blame] | 1535 | LIST_HEAD(list); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1536 | struct mfc6_cache *c, *next; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1537 | |
| 1538 | /* |
| 1539 | * Shut down all active vif entries |
| 1540 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1541 | for (i = 0; i < mrt->maxvif; i++) { |
| 1542 | if (!(mrt->vif6_table[i].flags & VIFF_STATIC)) |
| 1543 | mif6_delete(mrt, i, &list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1544 | } |
Eric Dumazet | c871e66 | 2009-10-28 04:48:11 +0000 | [diff] [blame] | 1545 | unregister_netdevice_many(&list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1546 | |
| 1547 | /* |
| 1548 | * Wipe the cache |
| 1549 | */ |
Benjamin Thery | 4a6258a | 2008-12-10 16:24:07 -0800 | [diff] [blame] | 1550 | for (i = 0; i < MFC6_LINES; i++) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1551 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1552 | if (c->mfc_flags & MFC_STATIC) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1553 | continue; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1554 | write_lock_bh(&mrt_lock); |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1555 | list_del(&c->list); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1556 | write_unlock_bh(&mrt_lock); |
| 1557 | |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1558 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
Benjamin Thery | 58701ad | 2008-12-10 16:22:34 -0800 | [diff] [blame] | 1559 | ip6mr_cache_free(c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1560 | } |
| 1561 | } |
| 1562 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1563 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1564 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1565 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
Patrick McHardy | f30a7784 | 2010-05-11 14:40:51 +0200 | [diff] [blame] | 1566 | list_del(&c->list); |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 1567 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1568 | ip6mr_destroy_unres(mrt, c); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1569 | } |
| 1570 | spin_unlock_bh(&mfc_unres_lock); |
| 1571 | } |
| 1572 | } |
| 1573 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1574 | static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1575 | { |
| 1576 | int err = 0; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1577 | struct net *net = sock_net(sk); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1578 | |
| 1579 | rtnl_lock(); |
| 1580 | write_lock_bh(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1581 | if (likely(mrt->mroute6_sk == NULL)) { |
| 1582 | mrt->mroute6_sk = sk; |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 1583 | net->ipv6.devconf_all->mc_forwarding++; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1584 | inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
| 1585 | NETCONFA_IFINDEX_ALL, |
| 1586 | net->ipv6.devconf_all); |
Thomas Goff | 1d6e55f | 2009-01-27 22:39:59 -0800 | [diff] [blame] | 1587 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1588 | else |
| 1589 | err = -EADDRINUSE; |
| 1590 | write_unlock_bh(&mrt_lock); |
| 1591 | |
| 1592 | rtnl_unlock(); |
| 1593 | |
| 1594 | return err; |
| 1595 | } |
| 1596 | |
| 1597 | int ip6mr_sk_done(struct sock *sk) |
| 1598 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1599 | int err = -EACCES; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1600 | struct net *net = sock_net(sk); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1601 | struct mr6_table *mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1602 | |
| 1603 | rtnl_lock(); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1604 | ip6mr_for_each_table(mrt, net) { |
| 1605 | if (sk == mrt->mroute6_sk) { |
| 1606 | write_lock_bh(&mrt_lock); |
| 1607 | mrt->mroute6_sk = NULL; |
| 1608 | net->ipv6.devconf_all->mc_forwarding--; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1609 | inet6_netconf_notify_devconf(net, |
| 1610 | NETCONFA_MC_FORWARDING, |
| 1611 | NETCONFA_IFINDEX_ALL, |
| 1612 | net->ipv6.devconf_all); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1613 | write_unlock_bh(&mrt_lock); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1614 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1615 | mroute_clean_tables(mrt); |
| 1616 | err = 0; |
| 1617 | break; |
| 1618 | } |
| 1619 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1620 | rtnl_unlock(); |
| 1621 | |
| 1622 | return err; |
| 1623 | } |
| 1624 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1625 | struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1626 | { |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1627 | struct mr6_table *mrt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1628 | struct flowi6 fl6 = { |
| 1629 | .flowi6_iif = skb->skb_iif, |
| 1630 | .flowi6_oif = skb->dev->ifindex, |
| 1631 | .flowi6_mark = skb->mark, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1632 | }; |
| 1633 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1634 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1635 | return NULL; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1636 | |
| 1637 | return mrt->mroute6_sk; |
| 1638 | } |
| 1639 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1640 | /* |
| 1641 | * Socket options and virtual interface manipulation. The whole |
| 1642 | * virtual interface system is a complete heap, but unfortunately |
| 1643 | * that's how BSD mrouted happens to think. Maybe one day with a proper |
| 1644 | * MOSPF/PIM router set up we can clean this up. |
| 1645 | */ |
| 1646 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1647 | int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1648 | { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1649 | int ret, parent = 0; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1650 | struct mif6ctl vif; |
| 1651 | struct mf6cctl mfc; |
| 1652 | mifi_t mifi; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1653 | struct net *net = sock_net(sk); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1654 | struct mr6_table *mrt; |
| 1655 | |
| 1656 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
| 1657 | if (mrt == NULL) |
| 1658 | return -ENOENT; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1659 | |
| 1660 | if (optname != MRT6_INIT) { |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1661 | if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1662 | return -EACCES; |
| 1663 | } |
| 1664 | |
| 1665 | switch (optname) { |
| 1666 | case MRT6_INIT: |
| 1667 | if (sk->sk_type != SOCK_RAW || |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1668 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1669 | return -EOPNOTSUPP; |
| 1670 | if (optlen < sizeof(int)) |
| 1671 | return -EINVAL; |
| 1672 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1673 | return ip6mr_sk_init(mrt, sk); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1674 | |
| 1675 | case MRT6_DONE: |
| 1676 | return ip6mr_sk_done(sk); |
| 1677 | |
| 1678 | case MRT6_ADD_MIF: |
| 1679 | if (optlen < sizeof(vif)) |
| 1680 | return -EINVAL; |
| 1681 | if (copy_from_user(&vif, optval, sizeof(vif))) |
| 1682 | return -EFAULT; |
Rami Rosen | 6ac7eb0 | 2008-04-10 12:40:10 +0300 | [diff] [blame] | 1683 | if (vif.mif6c_mifi >= MAXMIFS) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1684 | return -ENFILE; |
| 1685 | rtnl_lock(); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1686 | ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1687 | rtnl_unlock(); |
| 1688 | return ret; |
| 1689 | |
| 1690 | case MRT6_DEL_MIF: |
| 1691 | if (optlen < sizeof(mifi_t)) |
| 1692 | return -EINVAL; |
| 1693 | if (copy_from_user(&mifi, optval, sizeof(mifi_t))) |
| 1694 | return -EFAULT; |
| 1695 | rtnl_lock(); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1696 | ret = mif6_delete(mrt, mifi, NULL); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1697 | rtnl_unlock(); |
| 1698 | return ret; |
| 1699 | |
| 1700 | /* |
| 1701 | * Manipulate the forwarding caches. These live |
| 1702 | * in a sort of kernel/user symbiosis. |
| 1703 | */ |
| 1704 | case MRT6_ADD_MFC: |
| 1705 | case MRT6_DEL_MFC: |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1706 | parent = -1; |
| 1707 | case MRT6_ADD_MFC_PROXY: |
| 1708 | case MRT6_DEL_MFC_PROXY: |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1709 | if (optlen < sizeof(mfc)) |
| 1710 | return -EINVAL; |
| 1711 | if (copy_from_user(&mfc, optval, sizeof(mfc))) |
| 1712 | return -EFAULT; |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1713 | if (parent == 0) |
| 1714 | parent = mfc.mf6cc_parent; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1715 | rtnl_lock(); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1716 | if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) |
| 1717 | ret = ip6mr_mfc_delete(mrt, &mfc, parent); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1718 | else |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1719 | ret = ip6mr_mfc_add(net, mrt, &mfc, |
| 1720 | sk == mrt->mroute6_sk, parent); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1721 | rtnl_unlock(); |
| 1722 | return ret; |
| 1723 | |
| 1724 | /* |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1725 | * Control PIM assert (to activate pim will activate assert) |
| 1726 | */ |
| 1727 | case MRT6_ASSERT: |
| 1728 | { |
| 1729 | int v; |
Joe Perches | 03f52a0 | 2012-11-25 18:26:34 +0000 | [diff] [blame] | 1730 | |
| 1731 | if (optlen != sizeof(v)) |
| 1732 | return -EINVAL; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1733 | if (get_user(v, (int __user *)optval)) |
| 1734 | return -EFAULT; |
Joe Perches | 53d6841 | 2012-11-25 09:35:30 +0000 | [diff] [blame] | 1735 | mrt->mroute_do_assert = v; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1736 | return 0; |
| 1737 | } |
| 1738 | |
| 1739 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1740 | case MRT6_PIM: |
| 1741 | { |
YOSHIFUJI Hideaki | a9f83bf | 2008-04-10 15:41:28 +0900 | [diff] [blame] | 1742 | int v; |
Joe Perches | 03f52a0 | 2012-11-25 18:26:34 +0000 | [diff] [blame] | 1743 | |
| 1744 | if (optlen != sizeof(v)) |
| 1745 | return -EINVAL; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1746 | if (get_user(v, (int __user *)optval)) |
| 1747 | return -EFAULT; |
| 1748 | v = !!v; |
| 1749 | rtnl_lock(); |
| 1750 | ret = 0; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1751 | if (v != mrt->mroute_do_pim) { |
| 1752 | mrt->mroute_do_pim = v; |
| 1753 | mrt->mroute_do_assert = v; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1754 | } |
| 1755 | rtnl_unlock(); |
| 1756 | return ret; |
| 1757 | } |
| 1758 | |
| 1759 | #endif |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1760 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES |
| 1761 | case MRT6_TABLE: |
| 1762 | { |
| 1763 | u32 v; |
| 1764 | |
| 1765 | if (optlen != sizeof(u32)) |
| 1766 | return -EINVAL; |
| 1767 | if (get_user(v, (u32 __user *)optval)) |
| 1768 | return -EFAULT; |
Dan Carpenter | 75356a8 | 2013-01-23 20:38:34 +0000 | [diff] [blame] | 1769 | /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
| 1770 | if (v != RT_TABLE_DEFAULT && v >= 100000000) |
| 1771 | return -EINVAL; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1772 | if (sk == mrt->mroute6_sk) |
| 1773 | return -EBUSY; |
| 1774 | |
| 1775 | rtnl_lock(); |
| 1776 | ret = 0; |
| 1777 | if (!ip6mr_new_table(net, v)) |
| 1778 | ret = -ENOMEM; |
| 1779 | raw6_sk(sk)->ip6mr_table = v; |
| 1780 | rtnl_unlock(); |
| 1781 | return ret; |
| 1782 | } |
| 1783 | #endif |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1784 | /* |
Rami Rosen | 7d120c5 | 2008-04-23 14:35:13 +0300 | [diff] [blame] | 1785 | * Spurious command, or MRT6_VERSION which you cannot |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1786 | * set. |
| 1787 | */ |
| 1788 | default: |
| 1789 | return -ENOPROTOOPT; |
| 1790 | } |
| 1791 | } |
| 1792 | |
| 1793 | /* |
| 1794 | * Getsock opt support for the multicast routing system. |
| 1795 | */ |
| 1796 | |
| 1797 | int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, |
| 1798 | int __user *optlen) |
| 1799 | { |
| 1800 | int olr; |
| 1801 | int val; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1802 | struct net *net = sock_net(sk); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1803 | struct mr6_table *mrt; |
| 1804 | |
| 1805 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
| 1806 | if (mrt == NULL) |
| 1807 | return -ENOENT; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1808 | |
| 1809 | switch (optname) { |
| 1810 | case MRT6_VERSION: |
| 1811 | val = 0x0305; |
| 1812 | break; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1813 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 1814 | case MRT6_PIM: |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1815 | val = mrt->mroute_do_pim; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1816 | break; |
| 1817 | #endif |
| 1818 | case MRT6_ASSERT: |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1819 | val = mrt->mroute_do_assert; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 1820 | break; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1821 | default: |
| 1822 | return -ENOPROTOOPT; |
| 1823 | } |
| 1824 | |
| 1825 | if (get_user(olr, optlen)) |
| 1826 | return -EFAULT; |
| 1827 | |
| 1828 | olr = min_t(int, olr, sizeof(int)); |
| 1829 | if (olr < 0) |
| 1830 | return -EINVAL; |
| 1831 | |
| 1832 | if (put_user(olr, optlen)) |
| 1833 | return -EFAULT; |
| 1834 | if (copy_to_user(optval, &val, olr)) |
| 1835 | return -EFAULT; |
| 1836 | return 0; |
| 1837 | } |
| 1838 | |
| 1839 | /* |
| 1840 | * The IP multicast ioctl support routines. |
| 1841 | */ |
| 1842 | |
| 1843 | int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) |
| 1844 | { |
| 1845 | struct sioc_sg_req6 sr; |
| 1846 | struct sioc_mif_req6 vr; |
| 1847 | struct mif_device *vif; |
| 1848 | struct mfc6_cache *c; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 1849 | struct net *net = sock_net(sk); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 1850 | struct mr6_table *mrt; |
| 1851 | |
| 1852 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
| 1853 | if (mrt == NULL) |
| 1854 | return -ENOENT; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1855 | |
| 1856 | switch (cmd) { |
| 1857 | case SIOCGETMIFCNT_IN6: |
| 1858 | if (copy_from_user(&vr, arg, sizeof(vr))) |
| 1859 | return -EFAULT; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1860 | if (vr.mifi >= mrt->maxvif) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1861 | return -EINVAL; |
| 1862 | read_lock(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1863 | vif = &mrt->vif6_table[vr.mifi]; |
| 1864 | if (MIF_EXISTS(mrt, vr.mifi)) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1865 | vr.icount = vif->pkt_in; |
| 1866 | vr.ocount = vif->pkt_out; |
| 1867 | vr.ibytes = vif->bytes_in; |
| 1868 | vr.obytes = vif->bytes_out; |
| 1869 | read_unlock(&mrt_lock); |
| 1870 | |
| 1871 | if (copy_to_user(arg, &vr, sizeof(vr))) |
| 1872 | return -EFAULT; |
| 1873 | return 0; |
| 1874 | } |
| 1875 | read_unlock(&mrt_lock); |
| 1876 | return -EADDRNOTAVAIL; |
| 1877 | case SIOCGETSGCNT_IN6: |
| 1878 | if (copy_from_user(&sr, arg, sizeof(sr))) |
| 1879 | return -EFAULT; |
| 1880 | |
| 1881 | read_lock(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1882 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1883 | if (c) { |
| 1884 | sr.pktcnt = c->mfc_un.res.pkt; |
| 1885 | sr.bytecnt = c->mfc_un.res.bytes; |
| 1886 | sr.wrong_if = c->mfc_un.res.wrong_if; |
| 1887 | read_unlock(&mrt_lock); |
| 1888 | |
| 1889 | if (copy_to_user(arg, &sr, sizeof(sr))) |
| 1890 | return -EFAULT; |
| 1891 | return 0; |
| 1892 | } |
| 1893 | read_unlock(&mrt_lock); |
| 1894 | return -EADDRNOTAVAIL; |
| 1895 | default: |
| 1896 | return -ENOIOCTLCMD; |
| 1897 | } |
| 1898 | } |
| 1899 | |
David S. Miller | e2d5776 | 2011-02-03 17:59:32 -0800 | [diff] [blame] | 1900 | #ifdef CONFIG_COMPAT |
| 1901 | struct compat_sioc_sg_req6 { |
| 1902 | struct sockaddr_in6 src; |
| 1903 | struct sockaddr_in6 grp; |
| 1904 | compat_ulong_t pktcnt; |
| 1905 | compat_ulong_t bytecnt; |
| 1906 | compat_ulong_t wrong_if; |
| 1907 | }; |
| 1908 | |
| 1909 | struct compat_sioc_mif_req6 { |
| 1910 | mifi_t mifi; |
| 1911 | compat_ulong_t icount; |
| 1912 | compat_ulong_t ocount; |
| 1913 | compat_ulong_t ibytes; |
| 1914 | compat_ulong_t obytes; |
| 1915 | }; |
| 1916 | |
| 1917 | int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
| 1918 | { |
| 1919 | struct compat_sioc_sg_req6 sr; |
| 1920 | struct compat_sioc_mif_req6 vr; |
| 1921 | struct mif_device *vif; |
| 1922 | struct mfc6_cache *c; |
| 1923 | struct net *net = sock_net(sk); |
| 1924 | struct mr6_table *mrt; |
| 1925 | |
| 1926 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
| 1927 | if (mrt == NULL) |
| 1928 | return -ENOENT; |
| 1929 | |
| 1930 | switch (cmd) { |
| 1931 | case SIOCGETMIFCNT_IN6: |
| 1932 | if (copy_from_user(&vr, arg, sizeof(vr))) |
| 1933 | return -EFAULT; |
| 1934 | if (vr.mifi >= mrt->maxvif) |
| 1935 | return -EINVAL; |
| 1936 | read_lock(&mrt_lock); |
| 1937 | vif = &mrt->vif6_table[vr.mifi]; |
| 1938 | if (MIF_EXISTS(mrt, vr.mifi)) { |
| 1939 | vr.icount = vif->pkt_in; |
| 1940 | vr.ocount = vif->pkt_out; |
| 1941 | vr.ibytes = vif->bytes_in; |
| 1942 | vr.obytes = vif->bytes_out; |
| 1943 | read_unlock(&mrt_lock); |
| 1944 | |
| 1945 | if (copy_to_user(arg, &vr, sizeof(vr))) |
| 1946 | return -EFAULT; |
| 1947 | return 0; |
| 1948 | } |
| 1949 | read_unlock(&mrt_lock); |
| 1950 | return -EADDRNOTAVAIL; |
| 1951 | case SIOCGETSGCNT_IN6: |
| 1952 | if (copy_from_user(&sr, arg, sizeof(sr))) |
| 1953 | return -EFAULT; |
| 1954 | |
| 1955 | read_lock(&mrt_lock); |
| 1956 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
| 1957 | if (c) { |
| 1958 | sr.pktcnt = c->mfc_un.res.pkt; |
| 1959 | sr.bytecnt = c->mfc_un.res.bytes; |
| 1960 | sr.wrong_if = c->mfc_un.res.wrong_if; |
| 1961 | read_unlock(&mrt_lock); |
| 1962 | |
| 1963 | if (copy_to_user(arg, &sr, sizeof(sr))) |
| 1964 | return -EFAULT; |
| 1965 | return 0; |
| 1966 | } |
| 1967 | read_unlock(&mrt_lock); |
| 1968 | return -EADDRNOTAVAIL; |
| 1969 | default: |
| 1970 | return -ENOIOCTLCMD; |
| 1971 | } |
| 1972 | } |
| 1973 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1974 | |
| 1975 | static inline int ip6mr_forward2_finish(struct sk_buff *skb) |
| 1976 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1977 | IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)), |
Denis V. Lunev | 483a47d | 2008-10-08 11:09:27 -0700 | [diff] [blame] | 1978 | IPSTATS_MIB_OUTFORWDATAGRAMS); |
Vincent Bernat | 2d8dbb0 | 2012-06-05 03:41:42 +0000 | [diff] [blame] | 1979 | IP6_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)), |
| 1980 | IPSTATS_MIB_OUTOCTETS, skb->len); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1981 | return dst_output(skb); |
| 1982 | } |
| 1983 | |
| 1984 | /* |
| 1985 | * Processing handlers for ip6mr_forward |
| 1986 | */ |
| 1987 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1988 | static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, |
| 1989 | struct sk_buff *skb, struct mfc6_cache *c, int vifi) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1990 | { |
| 1991 | struct ipv6hdr *ipv6h; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 1992 | struct mif_device *vif = &mrt->vif6_table[vifi]; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1993 | struct net_device *dev; |
| 1994 | struct dst_entry *dst; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1995 | struct flowi6 fl6; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 1996 | |
| 1997 | if (vif->dev == NULL) |
| 1998 | goto out_free; |
| 1999 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2000 | #ifdef CONFIG_IPV6_PIMSM_V2 |
| 2001 | if (vif->flags & MIFF_REGISTER) { |
| 2002 | vif->pkt_out++; |
| 2003 | vif->bytes_out += skb->len; |
Pavel Emelyanov | dc58c78 | 2008-05-21 14:17:54 -0700 | [diff] [blame] | 2004 | vif->dev->stats.tx_bytes += skb->len; |
| 2005 | vif->dev->stats.tx_packets++; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2006 | ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); |
Ilpo Järvinen | 8da73b7 | 2008-12-14 23:15:49 -0800 | [diff] [blame] | 2007 | goto out_free; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2008 | } |
| 2009 | #endif |
| 2010 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2011 | ipv6h = ipv6_hdr(skb); |
| 2012 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2013 | fl6 = (struct flowi6) { |
| 2014 | .flowi6_oif = vif->link, |
| 2015 | .daddr = ipv6h->daddr, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2016 | }; |
| 2017 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2018 | dst = ip6_route_output(net, NULL, &fl6); |
RongQing.Li | 5095d64 | 2012-02-21 22:10:49 +0000 | [diff] [blame] | 2019 | if (dst->error) { |
| 2020 | dst_release(dst); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2021 | goto out_free; |
RongQing.Li | 5095d64 | 2012-02-21 22:10:49 +0000 | [diff] [blame] | 2022 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2023 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2024 | skb_dst_drop(skb); |
| 2025 | skb_dst_set(skb, dst); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2026 | |
| 2027 | /* |
| 2028 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally |
| 2029 | * not only before forwarding, but after forwarding on all output |
| 2030 | * interfaces. It is clear, if mrouter runs a multicasting |
| 2031 | * program, it should receive packets not depending to what interface |
| 2032 | * program is joined. |
| 2033 | * If we will not make it, the program will have to join on all |
| 2034 | * interfaces. On the other hand, multihoming host (or router, but |
| 2035 | * not mrouter) cannot join to more than one interface - it will |
| 2036 | * result in receiving multiple packets. |
| 2037 | */ |
| 2038 | dev = vif->dev; |
| 2039 | skb->dev = dev; |
| 2040 | vif->pkt_out++; |
| 2041 | vif->bytes_out += skb->len; |
| 2042 | |
| 2043 | /* We are about to write */ |
| 2044 | /* XXX: extension headers? */ |
| 2045 | if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) |
| 2046 | goto out_free; |
| 2047 | |
| 2048 | ipv6h = ipv6_hdr(skb); |
| 2049 | ipv6h->hop_limit--; |
| 2050 | |
| 2051 | IP6CB(skb)->flags |= IP6SKB_FORWARDED; |
| 2052 | |
Jan Engelhardt | b2e0b38 | 2010-03-23 04:09:07 +0100 | [diff] [blame] | 2053 | return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, skb, skb->dev, dev, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2054 | ip6mr_forward2_finish); |
| 2055 | |
| 2056 | out_free: |
| 2057 | kfree_skb(skb); |
| 2058 | return 0; |
| 2059 | } |
| 2060 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2061 | static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2062 | { |
| 2063 | int ct; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2064 | |
| 2065 | for (ct = mrt->maxvif - 1; ct >= 0; ct--) { |
| 2066 | if (mrt->vif6_table[ct].dev == dev) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2067 | break; |
| 2068 | } |
| 2069 | return ct; |
| 2070 | } |
| 2071 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2072 | static int ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
| 2073 | struct sk_buff *skb, struct mfc6_cache *cache) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2074 | { |
| 2075 | int psend = -1; |
| 2076 | int vif, ct; |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2077 | int true_vifi = ip6mr_find_vif(mrt, skb->dev); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2078 | |
| 2079 | vif = cache->mf6c_parent; |
| 2080 | cache->mfc_un.res.pkt++; |
| 2081 | cache->mfc_un.res.bytes += skb->len; |
| 2082 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2083 | if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { |
| 2084 | struct mfc6_cache *cache_proxy; |
| 2085 | |
| 2086 | /* For an (*,G) entry, we only check that the incomming |
| 2087 | * interface is part of the static tree. |
| 2088 | */ |
| 2089 | cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); |
| 2090 | if (cache_proxy && |
| 2091 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) |
| 2092 | goto forward; |
| 2093 | } |
| 2094 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2095 | /* |
| 2096 | * Wrong interface: drop packet and (maybe) send PIM assert. |
| 2097 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2098 | if (mrt->vif6_table[vif].dev != skb->dev) { |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2099 | cache->mfc_un.res.wrong_if++; |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2100 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2101 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2102 | /* pimsm uses asserts, when switching from RPT to SPT, |
| 2103 | so that we cannot check that packet arrived on an oif. |
| 2104 | It is bad, but otherwise we would need to move pretty |
| 2105 | large chunk of pimd to kernel. Ough... --ANK |
| 2106 | */ |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2107 | (mrt->mroute_do_pim || |
Benjamin Thery | a21f3f9 | 2008-12-10 16:28:44 -0800 | [diff] [blame] | 2108 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2109 | time_after(jiffies, |
| 2110 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { |
| 2111 | cache->mfc_un.res.last_assert = jiffies; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2112 | ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2113 | } |
| 2114 | goto dont_forward; |
| 2115 | } |
| 2116 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2117 | forward: |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2118 | mrt->vif6_table[vif].pkt_in++; |
| 2119 | mrt->vif6_table[vif].bytes_in += skb->len; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2120 | |
| 2121 | /* |
| 2122 | * Forward the frame |
| 2123 | */ |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2124 | if (ipv6_addr_any(&cache->mf6c_origin) && |
| 2125 | ipv6_addr_any(&cache->mf6c_mcastgrp)) { |
| 2126 | if (true_vifi >= 0 && |
| 2127 | true_vifi != cache->mf6c_parent && |
| 2128 | ipv6_hdr(skb)->hop_limit > |
| 2129 | cache->mfc_un.res.ttls[cache->mf6c_parent]) { |
| 2130 | /* It's an (*,*) entry and the packet is not coming from |
| 2131 | * the upstream: forward the packet to the upstream |
| 2132 | * only. |
| 2133 | */ |
| 2134 | psend = cache->mf6c_parent; |
| 2135 | goto last_forward; |
| 2136 | } |
| 2137 | goto dont_forward; |
| 2138 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2139 | for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2140 | /* For (*,G) entry, don't forward to the incoming interface */ |
| 2141 | if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && |
| 2142 | ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2143 | if (psend != -1) { |
| 2144 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2145 | if (skb2) |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2146 | ip6mr_forward2(net, mrt, skb2, cache, psend); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2147 | } |
| 2148 | psend = ct; |
| 2149 | } |
| 2150 | } |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2151 | last_forward: |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2152 | if (psend != -1) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2153 | ip6mr_forward2(net, mrt, skb, cache, psend); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2154 | return 0; |
| 2155 | } |
| 2156 | |
YOSHIFUJI Hideaki | 14fb64e | 2008-04-03 09:22:54 +0900 | [diff] [blame] | 2157 | dont_forward: |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2158 | kfree_skb(skb); |
| 2159 | return 0; |
| 2160 | } |
| 2161 | |
| 2162 | |
| 2163 | /* |
| 2164 | * Multicast packets for forwarding arrive here |
| 2165 | */ |
| 2166 | |
| 2167 | int ip6_mr_input(struct sk_buff *skb) |
| 2168 | { |
| 2169 | struct mfc6_cache *cache; |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2170 | struct net *net = dev_net(skb->dev); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 2171 | struct mr6_table *mrt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2172 | struct flowi6 fl6 = { |
| 2173 | .flowi6_iif = skb->dev->ifindex, |
| 2174 | .flowi6_mark = skb->mark, |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 2175 | }; |
| 2176 | int err; |
| 2177 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 2178 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
Ben Greear | 2015de5 | 2011-09-27 15:16:08 -0400 | [diff] [blame] | 2179 | if (err < 0) { |
| 2180 | kfree_skb(skb); |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 2181 | return err; |
Ben Greear | 2015de5 | 2011-09-27 15:16:08 -0400 | [diff] [blame] | 2182 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2183 | |
| 2184 | read_lock(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2185 | cache = ip6mr_cache_find(mrt, |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2186 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2187 | if (cache == NULL) { |
| 2188 | int vif = ip6mr_find_vif(mrt, skb->dev); |
| 2189 | |
| 2190 | if (vif >= 0) |
| 2191 | cache = ip6mr_cache_find_any(mrt, |
| 2192 | &ipv6_hdr(skb)->daddr, |
| 2193 | vif); |
| 2194 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2195 | |
| 2196 | /* |
| 2197 | * No usable cache entry |
| 2198 | */ |
| 2199 | if (cache == NULL) { |
| 2200 | int vif; |
| 2201 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2202 | vif = ip6mr_find_vif(mrt, skb->dev); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2203 | if (vif >= 0) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2204 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2205 | read_unlock(&mrt_lock); |
| 2206 | |
| 2207 | return err; |
| 2208 | } |
| 2209 | read_unlock(&mrt_lock); |
| 2210 | kfree_skb(skb); |
| 2211 | return -ENODEV; |
| 2212 | } |
| 2213 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2214 | ip6_mr_forward(net, mrt, skb, cache); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2215 | |
| 2216 | read_unlock(&mrt_lock); |
| 2217 | |
| 2218 | return 0; |
| 2219 | } |
| 2220 | |
| 2221 | |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2222 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
| 2223 | struct mfc6_cache *c, struct rtmsg *rtm) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2224 | { |
| 2225 | int ct; |
| 2226 | struct rtnexthop *nhp; |
Nicolas Dichtel | 70b386a | 2012-12-04 01:13:36 +0000 | [diff] [blame] | 2227 | struct nlattr *mp_attr; |
Nicolas Dichtel | adfa85e | 2012-12-04 01:13:37 +0000 | [diff] [blame] | 2228 | struct rta_mfc_stats mfcs; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2229 | |
Nicolas Dichtel | 7438189 | 2010-03-25 23:45:35 +0000 | [diff] [blame] | 2230 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
Dan Carpenter | ed0f160a | 2010-05-26 00:38:56 -0700 | [diff] [blame] | 2231 | if (c->mf6c_parent >= MAXMIFS) |
Nicolas Dichtel | 7438189 | 2010-03-25 23:45:35 +0000 | [diff] [blame] | 2232 | return -ENOENT; |
| 2233 | |
Thomas Graf | 74a0bd7 | 2012-06-26 23:36:14 +0000 | [diff] [blame] | 2234 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
| 2235 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) |
| 2236 | return -EMSGSIZE; |
Nicolas Dichtel | 70b386a | 2012-12-04 01:13:36 +0000 | [diff] [blame] | 2237 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
| 2238 | if (mp_attr == NULL) |
| 2239 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2240 | |
| 2241 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2242 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
Nicolas Dichtel | 70b386a | 2012-12-04 01:13:36 +0000 | [diff] [blame] | 2243 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
| 2244 | if (nhp == NULL) { |
| 2245 | nla_nest_cancel(skb, mp_attr); |
| 2246 | return -EMSGSIZE; |
| 2247 | } |
| 2248 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2249 | nhp->rtnh_flags = 0; |
| 2250 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2251 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2252 | nhp->rtnh_len = sizeof(*nhp); |
| 2253 | } |
| 2254 | } |
Nicolas Dichtel | 70b386a | 2012-12-04 01:13:36 +0000 | [diff] [blame] | 2255 | |
| 2256 | nla_nest_end(skb, mp_attr); |
| 2257 | |
Nicolas Dichtel | adfa85e | 2012-12-04 01:13:37 +0000 | [diff] [blame] | 2258 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
| 2259 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; |
| 2260 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; |
| 2261 | if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0) |
| 2262 | return -EMSGSIZE; |
| 2263 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2264 | rtm->rtm_type = RTN_MULTICAST; |
| 2265 | return 1; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2266 | } |
| 2267 | |
Benjamin Thery | 8229efd | 2008-12-10 16:30:15 -0800 | [diff] [blame] | 2268 | int ip6mr_get_route(struct net *net, |
| 2269 | struct sk_buff *skb, struct rtmsg *rtm, int nowait) |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2270 | { |
| 2271 | int err; |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 2272 | struct mr6_table *mrt; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2273 | struct mfc6_cache *cache; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2274 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2275 | |
Patrick McHardy | d1db275 | 2010-05-11 14:40:55 +0200 | [diff] [blame] | 2276 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
| 2277 | if (mrt == NULL) |
| 2278 | return -ENOENT; |
| 2279 | |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2280 | read_lock(&mrt_lock); |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2281 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2282 | if (!cache && skb->dev) { |
| 2283 | int vif = ip6mr_find_vif(mrt, skb->dev); |
| 2284 | |
| 2285 | if (vif >= 0) |
| 2286 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, |
| 2287 | vif); |
| 2288 | } |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2289 | |
| 2290 | if (!cache) { |
| 2291 | struct sk_buff *skb2; |
| 2292 | struct ipv6hdr *iph; |
| 2293 | struct net_device *dev; |
| 2294 | int vif; |
| 2295 | |
| 2296 | if (nowait) { |
| 2297 | read_unlock(&mrt_lock); |
| 2298 | return -EAGAIN; |
| 2299 | } |
| 2300 | |
| 2301 | dev = skb->dev; |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2302 | if (dev == NULL || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2303 | read_unlock(&mrt_lock); |
| 2304 | return -ENODEV; |
| 2305 | } |
| 2306 | |
| 2307 | /* really correct? */ |
| 2308 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); |
| 2309 | if (!skb2) { |
| 2310 | read_unlock(&mrt_lock); |
| 2311 | return -ENOMEM; |
| 2312 | } |
| 2313 | |
| 2314 | skb_reset_transport_header(skb2); |
| 2315 | |
| 2316 | skb_put(skb2, sizeof(struct ipv6hdr)); |
| 2317 | skb_reset_network_header(skb2); |
| 2318 | |
| 2319 | iph = ipv6_hdr(skb2); |
| 2320 | iph->version = 0; |
| 2321 | iph->priority = 0; |
| 2322 | iph->flow_lbl[0] = 0; |
| 2323 | iph->flow_lbl[1] = 0; |
| 2324 | iph->flow_lbl[2] = 0; |
| 2325 | iph->payload_len = 0; |
| 2326 | iph->nexthdr = IPPROTO_NONE; |
| 2327 | iph->hop_limit = 0; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2328 | iph->saddr = rt->rt6i_src.addr; |
| 2329 | iph->daddr = rt->rt6i_dst.addr; |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2330 | |
Patrick McHardy | 6bd5214 | 2010-05-11 14:40:53 +0200 | [diff] [blame] | 2331 | err = ip6mr_cache_unresolved(mrt, vif, skb2); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2332 | read_unlock(&mrt_lock); |
| 2333 | |
| 2334 | return err; |
| 2335 | } |
| 2336 | |
| 2337 | if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) |
| 2338 | cache->mfc_flags |= MFC_NOTIFY; |
| 2339 | |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2340 | err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 2341 | read_unlock(&mrt_lock); |
| 2342 | return err; |
| 2343 | } |
| 2344 | |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2345 | static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 2346 | u32 portid, u32 seq, struct mfc6_cache *c, int cmd) |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2347 | { |
| 2348 | struct nlmsghdr *nlh; |
| 2349 | struct rtmsg *rtm; |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2350 | int err; |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2351 | |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 2352 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), NLM_F_MULTI); |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2353 | if (nlh == NULL) |
| 2354 | return -EMSGSIZE; |
| 2355 | |
| 2356 | rtm = nlmsg_data(nlh); |
Nicolas Dichtel | 193c1e4 | 2012-12-04 01:01:49 +0000 | [diff] [blame] | 2357 | rtm->rtm_family = RTNL_FAMILY_IP6MR; |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2358 | rtm->rtm_dst_len = 128; |
| 2359 | rtm->rtm_src_len = 128; |
| 2360 | rtm->rtm_tos = 0; |
| 2361 | rtm->rtm_table = mrt->id; |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2362 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
| 2363 | goto nla_put_failure; |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2364 | rtm->rtm_type = RTN_MULTICAST; |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2365 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
Nicolas Dichtel | 9a68ac7 | 2012-12-04 01:13:38 +0000 | [diff] [blame] | 2366 | if (c->mfc_flags & MFC_STATIC) |
| 2367 | rtm->rtm_protocol = RTPROT_STATIC; |
| 2368 | else |
| 2369 | rtm->rtm_protocol = RTPROT_MROUTED; |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2370 | rtm->rtm_flags = 0; |
| 2371 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 2372 | if (nla_put(skb, RTA_SRC, 16, &c->mf6c_origin) || |
| 2373 | nla_put(skb, RTA_DST, 16, &c->mf6c_mcastgrp)) |
| 2374 | goto nla_put_failure; |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2375 | err = __ip6mr_fill_mroute(mrt, skb, c, rtm); |
| 2376 | /* do not break the dump if cache is unresolved */ |
| 2377 | if (err < 0 && err != -ENOENT) |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2378 | goto nla_put_failure; |
| 2379 | |
| 2380 | return nlmsg_end(skb, nlh); |
| 2381 | |
| 2382 | nla_put_failure: |
| 2383 | nlmsg_cancel(skb, nlh); |
| 2384 | return -EMSGSIZE; |
| 2385 | } |
| 2386 | |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 2387 | static int mr6_msgsize(bool unresolved, int maxvif) |
| 2388 | { |
| 2389 | size_t len = |
| 2390 | NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2391 | + nla_total_size(4) /* RTA_TABLE */ |
| 2392 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ |
| 2393 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ |
| 2394 | ; |
| 2395 | |
| 2396 | if (!unresolved) |
| 2397 | len = len |
| 2398 | + nla_total_size(4) /* RTA_IIF */ |
| 2399 | + nla_total_size(0) /* RTA_MULTIPATH */ |
| 2400 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) |
| 2401 | /* RTA_MFC_STATS */ |
| 2402 | + nla_total_size(sizeof(struct rta_mfc_stats)) |
| 2403 | ; |
| 2404 | |
| 2405 | return len; |
| 2406 | } |
| 2407 | |
| 2408 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, |
| 2409 | int cmd) |
| 2410 | { |
| 2411 | struct net *net = read_pnet(&mrt->net); |
| 2412 | struct sk_buff *skb; |
| 2413 | int err = -ENOBUFS; |
| 2414 | |
| 2415 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), |
| 2416 | GFP_ATOMIC); |
| 2417 | if (skb == NULL) |
| 2418 | goto errout; |
| 2419 | |
| 2420 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd); |
| 2421 | if (err < 0) |
| 2422 | goto errout; |
| 2423 | |
| 2424 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); |
| 2425 | return; |
| 2426 | |
| 2427 | errout: |
| 2428 | kfree_skb(skb); |
| 2429 | if (err < 0) |
| 2430 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); |
| 2431 | } |
| 2432 | |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2433 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
| 2434 | { |
| 2435 | struct net *net = sock_net(skb->sk); |
| 2436 | struct mr6_table *mrt; |
| 2437 | struct mfc6_cache *mfc; |
| 2438 | unsigned int t = 0, s_t; |
| 2439 | unsigned int h = 0, s_h; |
| 2440 | unsigned int e = 0, s_e; |
| 2441 | |
| 2442 | s_t = cb->args[0]; |
| 2443 | s_h = cb->args[1]; |
| 2444 | s_e = cb->args[2]; |
| 2445 | |
| 2446 | read_lock(&mrt_lock); |
| 2447 | ip6mr_for_each_table(mrt, net) { |
| 2448 | if (t < s_t) |
| 2449 | goto next_table; |
| 2450 | if (t > s_t) |
| 2451 | s_h = 0; |
| 2452 | for (h = s_h; h < MFC6_LINES; h++) { |
| 2453 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { |
| 2454 | if (e < s_e) |
| 2455 | goto next_entry; |
| 2456 | if (ip6mr_fill_mroute(mrt, skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2457 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2458 | cb->nlh->nlmsg_seq, |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 2459 | mfc, RTM_NEWROUTE) < 0) |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2460 | goto done; |
| 2461 | next_entry: |
| 2462 | e++; |
| 2463 | } |
| 2464 | e = s_e = 0; |
| 2465 | } |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2466 | spin_lock_bh(&mfc_unres_lock); |
| 2467 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { |
| 2468 | if (e < s_e) |
| 2469 | goto next_entry2; |
| 2470 | if (ip6mr_fill_mroute(mrt, skb, |
| 2471 | NETLINK_CB(cb->skb).portid, |
| 2472 | cb->nlh->nlmsg_seq, |
Nicolas Dichtel | 812e44d | 2012-12-04 01:13:41 +0000 | [diff] [blame] | 2473 | mfc, RTM_NEWROUTE) < 0) { |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2474 | spin_unlock_bh(&mfc_unres_lock); |
| 2475 | goto done; |
| 2476 | } |
| 2477 | next_entry2: |
| 2478 | e++; |
| 2479 | } |
| 2480 | spin_unlock_bh(&mfc_unres_lock); |
| 2481 | e = s_e = 0; |
Patrick McHardy | 5b285ca | 2010-05-11 14:40:56 +0200 | [diff] [blame] | 2482 | s_h = 0; |
| 2483 | next_table: |
| 2484 | t++; |
| 2485 | } |
| 2486 | done: |
| 2487 | read_unlock(&mrt_lock); |
| 2488 | |
| 2489 | cb->args[2] = e; |
| 2490 | cb->args[1] = h; |
| 2491 | cb->args[0] = t; |
| 2492 | |
| 2493 | return skb->len; |
| 2494 | } |