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YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001/*
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 Hideaki7bc570c2008-04-03 09:22:53 +090019#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 Hideaki7bc570c2008-04-03 09:22:53 +090029#include <linux/inet.h>
30#include <linux/netdevice.h>
31#include <linux/inetdevice.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090032#include <linux/proc_fs.h>
33#include <linux/seq_file.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090034#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090035#include <linux/slab.h>
David S. Millere2d57762011-02-03 17:59:32 -080036#include <linux/compat.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090037#include <net/protocol.h>
38#include <linux/skbuff.h>
39#include <net/sock.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090040#include <net/raw.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090041#include <linux/notifier.h>
42#include <linux/if_arp.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090043#include <net/checksum.h>
44#include <net/netlink.h>
Patrick McHardyd1db2752010-05-11 14:40:55 +020045#include <net/fib_rules.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090046
47#include <net/ipv6.h>
48#include <net/ip6_route.h>
49#include <linux/mroute6.h>
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +090050#include <linux/pim.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090051#include <net/addrconf.h>
52#include <linux/netfilter_ipv6.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040053#include <linux/export.h>
Dave Jones5d6e4302009-01-31 00:51:49 -080054#include <net/ip6_checksum.h>
Nicolas Dichteld67b8c62012-12-04 01:13:35 +000055#include <linux/netconf.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090056
Patrick McHardy6bd52142010-05-11 14:40:53 +020057struct mr6_table {
Patrick McHardyd1db2752010-05-11 14:40:55 +020058 struct list_head list;
Patrick McHardy6bd52142010-05-11 14:40:53 +020059#ifdef CONFIG_NET_NS
60 struct net *net;
61#endif
Patrick McHardyd1db2752010-05-11 14:40:55 +020062 u32 id;
Patrick McHardy6bd52142010-05-11 14:40:53 +020063 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 Perches53d68412012-11-25 09:35:30 +000070 bool mroute_do_assert;
71 bool mroute_do_pim;
Patrick McHardy6bd52142010-05-11 14:40:53 +020072#ifdef CONFIG_IPV6_PIMSM_V2
73 int mroute_reg_vif_num;
74#endif
75};
76
Patrick McHardyd1db2752010-05-11 14:40:55 +020077struct ip6mr_rule {
78 struct fib_rule common;
79};
80
81struct ip6mr_result {
82 struct mr6_table *mrt;
83};
84
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090085/* Big lock, protecting vif table, mrt cache and mroute socket state.
86 Note that the changes are semaphored via rtnl_lock.
87 */
88
89static DEFINE_RWLOCK(mrt_lock);
90
91/*
92 * Multicast router control variables
93 */
94
Patrick McHardy6bd52142010-05-11 14:40:53 +020095#define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090096
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090097/* Special spinlock for queue of unresolved entries */
98static 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
108static struct kmem_cache *mrt_cachep __read_mostly;
109
Patrick McHardyd1db2752010-05-11 14:40:55 +0200110static struct mr6_table *ip6mr_new_table(struct net *net, u32 id);
111static void ip6mr_free_table(struct mr6_table *mrt);
112
Rami Rosen2b52c3a2013-07-21 03:00:31 +0300113static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
114 struct sk_buff *skb, struct mfc6_cache *cache);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200115static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
Benjamin Thery8229efd2008-12-10 16:30:15 -0800116 mifi_t mifi, int assert);
Patrick McHardy5b285ca2010-05-11 14:40:56 +0200117static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
118 struct mfc6_cache *c, struct rtmsg *rtm);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +0000119static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
120 int cmd);
Patrick McHardy5b285ca2010-05-11 14:40:56 +0200121static int ip6mr_rtm_dumproute(struct sk_buff *skb,
122 struct netlink_callback *cb);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200123static void mroute_clean_tables(struct mr6_table *mrt);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200124static void ipmr_expire_process(unsigned long arg);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900125
Patrick McHardyd1db2752010-05-11 14:40:55 +0200126#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
Eric Dumazet8ffb3352010-06-06 15:34:40 -0700127#define ip6mr_for_each_table(mrt, net) \
Patrick McHardyd1db2752010-05-11 14:40:55 +0200128 list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
129
130static 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. Miller4c9483b2011-03-12 16:22:43 -0500141static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200142 struct mr6_table **mrt)
143{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200144 int err;
Hannes Frederic Sowa95f4a452014-01-13 02:45:22 +0100145 struct ip6mr_result res;
146 struct fib_lookup_arg arg = {
147 .result = &res,
148 .flags = FIB_LOOKUP_NOREF,
149 };
Patrick McHardyd1db2752010-05-11 14:40:55 +0200150
David S. Miller4c9483b2011-03-12 16:22:43 -0500151 err = fib_rules_lookup(net->ipv6.mr6_rules_ops,
152 flowi6_to_flowi(flp6), 0, &arg);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200153 if (err < 0)
154 return err;
155 *mrt = res.mrt;
156 return 0;
157}
158
159static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
160 int flags, struct fib_lookup_arg *arg)
161{
162 struct ip6mr_result *res = arg->result;
163 struct mr6_table *mrt;
164
165 switch (rule->action) {
166 case FR_ACT_TO_TBL:
167 break;
168 case FR_ACT_UNREACHABLE:
169 return -ENETUNREACH;
170 case FR_ACT_PROHIBIT:
171 return -EACCES;
172 case FR_ACT_BLACKHOLE:
173 default:
174 return -EINVAL;
175 }
176
177 mrt = ip6mr_get_table(rule->fr_net, rule->table);
178 if (mrt == NULL)
179 return -EAGAIN;
180 res->mrt = mrt;
181 return 0;
182}
183
184static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags)
185{
186 return 1;
187}
188
189static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = {
190 FRA_GENERIC_POLICY,
191};
192
193static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
194 struct fib_rule_hdr *frh, struct nlattr **tb)
195{
196 return 0;
197}
198
199static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
200 struct nlattr **tb)
201{
202 return 1;
203}
204
205static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
206 struct fib_rule_hdr *frh)
207{
208 frh->dst_len = 0;
209 frh->src_len = 0;
210 frh->tos = 0;
211 return 0;
212}
213
Andi Kleen04a6f822012-10-04 17:12:11 -0700214static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = {
Patrick McHardyd1db2752010-05-11 14:40:55 +0200215 .family = RTNL_FAMILY_IP6MR,
216 .rule_size = sizeof(struct ip6mr_rule),
217 .addr_size = sizeof(struct in6_addr),
218 .action = ip6mr_rule_action,
219 .match = ip6mr_rule_match,
220 .configure = ip6mr_rule_configure,
221 .compare = ip6mr_rule_compare,
222 .default_pref = fib_default_rule_pref,
223 .fill = ip6mr_rule_fill,
224 .nlgroup = RTNLGRP_IPV6_RULE,
225 .policy = ip6mr_rule_policy,
226 .owner = THIS_MODULE,
227};
228
229static int __net_init ip6mr_rules_init(struct net *net)
230{
231 struct fib_rules_ops *ops;
232 struct mr6_table *mrt;
233 int err;
234
235 ops = fib_rules_register(&ip6mr_rules_ops_template, net);
236 if (IS_ERR(ops))
237 return PTR_ERR(ops);
238
239 INIT_LIST_HEAD(&net->ipv6.mr6_tables);
240
241 mrt = ip6mr_new_table(net, RT6_TABLE_DFLT);
242 if (mrt == NULL) {
243 err = -ENOMEM;
244 goto err1;
245 }
246
247 err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0);
248 if (err < 0)
249 goto err2;
250
251 net->ipv6.mr6_rules_ops = ops;
252 return 0;
253
254err2:
255 kfree(mrt);
256err1:
257 fib_rules_unregister(ops);
258 return err;
259}
260
261static void __net_exit ip6mr_rules_exit(struct net *net)
262{
263 struct mr6_table *mrt, *next;
264
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200265 rtnl_lock();
Eric Dumazet035320d2010-06-06 23:48:40 +0000266 list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
267 list_del(&mrt->list);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200268 ip6mr_free_table(mrt);
Eric Dumazet035320d2010-06-06 23:48:40 +0000269 }
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200270 rtnl_unlock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200271 fib_rules_unregister(net->ipv6.mr6_rules_ops);
272}
273#else
274#define ip6mr_for_each_table(mrt, net) \
275 for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
276
277static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
278{
279 return net->ipv6.mrt6;
280}
281
David S. Miller4c9483b2011-03-12 16:22:43 -0500282static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200283 struct mr6_table **mrt)
284{
285 *mrt = net->ipv6.mrt6;
286 return 0;
287}
288
289static int __net_init ip6mr_rules_init(struct net *net)
290{
291 net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT);
292 return net->ipv6.mrt6 ? 0 : -ENOMEM;
293}
294
295static void __net_exit ip6mr_rules_exit(struct net *net)
296{
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200297 rtnl_lock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200298 ip6mr_free_table(net->ipv6.mrt6);
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200299 net->ipv6.mrt6 = NULL;
300 rtnl_unlock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200301}
302#endif
303
304static struct mr6_table *ip6mr_new_table(struct net *net, u32 id)
305{
306 struct mr6_table *mrt;
307 unsigned int i;
308
309 mrt = ip6mr_get_table(net, id);
310 if (mrt != NULL)
311 return mrt;
312
313 mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
314 if (mrt == NULL)
315 return NULL;
316 mrt->id = id;
317 write_pnet(&mrt->net, net);
318
319 /* Forwarding cache */
320 for (i = 0; i < MFC6_LINES; i++)
321 INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]);
322
323 INIT_LIST_HEAD(&mrt->mfc6_unres_queue);
324
325 setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process,
326 (unsigned long)mrt);
327
328#ifdef CONFIG_IPV6_PIMSM_V2
329 mrt->mroute_reg_vif_num = -1;
330#endif
331#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
332 list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables);
333#endif
334 return mrt;
335}
336
337static void ip6mr_free_table(struct mr6_table *mrt)
338{
339 del_timer(&mrt->ipmr_expire_timer);
340 mroute_clean_tables(mrt);
341 kfree(mrt);
342}
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900343
344#ifdef CONFIG_PROC_FS
345
346struct ipmr_mfc_iter {
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800347 struct seq_net_private p;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200348 struct mr6_table *mrt;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200349 struct list_head *cache;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900350 int ct;
351};
352
353
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800354static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
355 struct ipmr_mfc_iter *it, loff_t pos)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900356{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200357 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900358 struct mfc6_cache *mfc;
359
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900360 read_lock(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +0200361 for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200362 it->cache = &mrt->mfc6_cache_array[it->ct];
Patrick McHardyf30a77842010-05-11 14:40:51 +0200363 list_for_each_entry(mfc, it->cache, list)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900364 if (pos-- == 0)
365 return mfc;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200366 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900367 read_unlock(&mrt_lock);
368
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900369 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200370 it->cache = &mrt->mfc6_unres_queue;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200371 list_for_each_entry(mfc, it->cache, list)
Patrick McHardyc476efb2010-05-11 14:40:48 +0200372 if (pos-- == 0)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900373 return mfc;
374 spin_unlock_bh(&mfc_unres_lock);
375
376 it->cache = NULL;
377 return NULL;
378}
379
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900380/*
381 * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
382 */
383
384struct ipmr_vif_iter {
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800385 struct seq_net_private p;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200386 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900387 int ct;
388};
389
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800390static struct mif_device *ip6mr_vif_seq_idx(struct net *net,
391 struct ipmr_vif_iter *iter,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900392 loff_t pos)
393{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200394 struct mr6_table *mrt = iter->mrt;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200395
396 for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) {
397 if (!MIF_EXISTS(mrt, iter->ct))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900398 continue;
399 if (pos-- == 0)
Patrick McHardy6bd52142010-05-11 14:40:53 +0200400 return &mrt->vif6_table[iter->ct];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900401 }
402 return NULL;
403}
404
405static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
406 __acquires(mrt_lock)
407{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200408 struct ipmr_vif_iter *iter = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800409 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200410 struct mr6_table *mrt;
411
412 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
413 if (mrt == NULL)
414 return ERR_PTR(-ENOENT);
415
416 iter->mrt = mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800417
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900418 read_lock(&mrt_lock);
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800419 return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1)
420 : SEQ_START_TOKEN;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900421}
422
423static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
424{
425 struct ipmr_vif_iter *iter = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800426 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200427 struct mr6_table *mrt = iter->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900428
429 ++*pos;
430 if (v == SEQ_START_TOKEN)
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800431 return ip6mr_vif_seq_idx(net, iter, 0);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900432
Patrick McHardy6bd52142010-05-11 14:40:53 +0200433 while (++iter->ct < mrt->maxvif) {
434 if (!MIF_EXISTS(mrt, iter->ct))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900435 continue;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200436 return &mrt->vif6_table[iter->ct];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900437 }
438 return NULL;
439}
440
441static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v)
442 __releases(mrt_lock)
443{
444 read_unlock(&mrt_lock);
445}
446
447static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
448{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200449 struct ipmr_vif_iter *iter = seq->private;
450 struct mr6_table *mrt = iter->mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800451
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900452 if (v == SEQ_START_TOKEN) {
453 seq_puts(seq,
454 "Interface BytesIn PktsIn BytesOut PktsOut Flags\n");
455 } else {
456 const struct mif_device *vif = v;
457 const char *name = vif->dev ? vif->dev->name : "none";
458
459 seq_printf(seq,
Al Virod430a222008-06-02 10:59:02 +0100460 "%2td %-10s %8ld %7ld %8ld %7ld %05X\n",
Patrick McHardy6bd52142010-05-11 14:40:53 +0200461 vif - mrt->vif6_table,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900462 name, vif->bytes_in, vif->pkt_in,
463 vif->bytes_out, vif->pkt_out,
464 vif->flags);
465 }
466 return 0;
467}
468
Stephen Hemminger98147d52009-09-01 19:25:02 +0000469static const struct seq_operations ip6mr_vif_seq_ops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900470 .start = ip6mr_vif_seq_start,
471 .next = ip6mr_vif_seq_next,
472 .stop = ip6mr_vif_seq_stop,
473 .show = ip6mr_vif_seq_show,
474};
475
476static int ip6mr_vif_open(struct inode *inode, struct file *file)
477{
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800478 return seq_open_net(inode, file, &ip6mr_vif_seq_ops,
479 sizeof(struct ipmr_vif_iter));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900480}
481
Stephen Hemminger5ca1b992009-09-01 19:25:05 +0000482static const struct file_operations ip6mr_vif_fops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900483 .owner = THIS_MODULE,
484 .open = ip6mr_vif_open,
485 .read = seq_read,
486 .llseek = seq_lseek,
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800487 .release = seq_release_net,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900488};
489
490static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
491{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200492 struct ipmr_mfc_iter *it = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800493 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200494 struct mr6_table *mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800495
Patrick McHardyd1db2752010-05-11 14:40:55 +0200496 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
497 if (mrt == NULL)
498 return ERR_PTR(-ENOENT);
499
500 it->mrt = mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800501 return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
502 : SEQ_START_TOKEN;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900503}
504
505static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
506{
507 struct mfc6_cache *mfc = v;
508 struct ipmr_mfc_iter *it = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800509 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200510 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900511
512 ++*pos;
513
514 if (v == SEQ_START_TOKEN)
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800515 return ipmr_mfc_seq_idx(net, seq->private, 0);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900516
Patrick McHardyf30a77842010-05-11 14:40:51 +0200517 if (mfc->list.next != it->cache)
518 return list_entry(mfc->list.next, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900519
Patrick McHardy6bd52142010-05-11 14:40:53 +0200520 if (it->cache == &mrt->mfc6_unres_queue)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900521 goto end_of_list;
522
Patrick McHardy6bd52142010-05-11 14:40:53 +0200523 BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900524
Benjamin Thery4a6258a2008-12-10 16:24:07 -0800525 while (++it->ct < MFC6_LINES) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200526 it->cache = &mrt->mfc6_cache_array[it->ct];
Patrick McHardyf30a77842010-05-11 14:40:51 +0200527 if (list_empty(it->cache))
528 continue;
529 return list_first_entry(it->cache, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900530 }
531
532 /* exhausted cache_array, show unresolved */
533 read_unlock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200534 it->cache = &mrt->mfc6_unres_queue;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900535 it->ct = 0;
536
537 spin_lock_bh(&mfc_unres_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +0200538 if (!list_empty(it->cache))
539 return list_first_entry(it->cache, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900540
541 end_of_list:
542 spin_unlock_bh(&mfc_unres_lock);
543 it->cache = NULL;
544
545 return NULL;
546}
547
548static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
549{
550 struct ipmr_mfc_iter *it = seq->private;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200551 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900552
Patrick McHardy6bd52142010-05-11 14:40:53 +0200553 if (it->cache == &mrt->mfc6_unres_queue)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900554 spin_unlock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200555 else if (it->cache == mrt->mfc6_cache_array)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900556 read_unlock(&mrt_lock);
557}
558
559static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
560{
561 int n;
562
563 if (v == SEQ_START_TOKEN) {
564 seq_puts(seq,
565 "Group "
566 "Origin "
567 "Iif Pkts Bytes Wrong Oifs\n");
568 } else {
569 const struct mfc6_cache *mfc = v;
570 const struct ipmr_mfc_iter *it = seq->private;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200571 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900572
Benjamin Thery999890b2008-12-03 22:22:16 -0800573 seq_printf(seq, "%pI6 %pI6 %-3hd",
Harvey Harrison0c6ce782008-10-28 16:09:23 -0700574 &mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800575 mfc->mf6c_parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900576
Patrick McHardy6bd52142010-05-11 14:40:53 +0200577 if (it->cache != &mrt->mfc6_unres_queue) {
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800578 seq_printf(seq, " %8lu %8lu %8lu",
579 mfc->mfc_un.res.pkt,
580 mfc->mfc_un.res.bytes,
581 mfc->mfc_un.res.wrong_if);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900582 for (n = mfc->mfc_un.res.minvif;
583 n < mfc->mfc_un.res.maxvif; n++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200584 if (MIF_EXISTS(mrt, n) &&
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900585 mfc->mfc_un.res.ttls[n] < 255)
586 seq_printf(seq,
587 " %2d:%-3d",
588 n, mfc->mfc_un.res.ttls[n]);
589 }
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800590 } else {
591 /* unresolved mfc_caches don't contain
592 * pkt, bytes and wrong_if values
593 */
594 seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900595 }
596 seq_putc(seq, '\n');
597 }
598 return 0;
599}
600
James Morris88e9d342009-09-22 16:43:43 -0700601static const struct seq_operations ipmr_mfc_seq_ops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900602 .start = ipmr_mfc_seq_start,
603 .next = ipmr_mfc_seq_next,
604 .stop = ipmr_mfc_seq_stop,
605 .show = ipmr_mfc_seq_show,
606};
607
608static int ipmr_mfc_open(struct inode *inode, struct file *file)
609{
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800610 return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
611 sizeof(struct ipmr_mfc_iter));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900612}
613
Stephen Hemminger5ca1b992009-09-01 19:25:05 +0000614static const struct file_operations ip6mr_mfc_fops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900615 .owner = THIS_MODULE,
616 .open = ipmr_mfc_open,
617 .read = seq_read,
618 .llseek = seq_lseek,
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800619 .release = seq_release_net,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900620};
621#endif
622
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900623#ifdef CONFIG_IPV6_PIMSM_V2
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900624
625static int pim6_rcv(struct sk_buff *skb)
626{
627 struct pimreghdr *pim;
628 struct ipv6hdr *encap;
629 struct net_device *reg_dev = NULL;
Benjamin Thery8229efd2008-12-10 16:30:15 -0800630 struct net *net = dev_net(skb->dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200631 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -0500632 struct flowi6 fl6 = {
633 .flowi6_iif = skb->dev->ifindex,
634 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200635 };
636 int reg_vif_num;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900637
638 if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
639 goto drop;
640
641 pim = (struct pimreghdr *)skb_transport_header(skb);
642 if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) ||
643 (pim->flags & PIM_NULL_REGISTER) ||
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800644 (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
645 sizeof(*pim), IPPROTO_PIM,
646 csum_partial((void *)pim, sizeof(*pim), 0)) &&
Al Viroec6b4862008-04-26 22:28:58 -0700647 csum_fold(skb_checksum(skb, 0, skb->len, 0))))
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900648 goto drop;
649
650 /* check if the inner packet is destined to mcast group */
651 encap = (struct ipv6hdr *)(skb_transport_header(skb) +
652 sizeof(*pim));
653
654 if (!ipv6_addr_is_multicast(&encap->daddr) ||
655 encap->payload_len == 0 ||
656 ntohs(encap->payload_len) + sizeof(*pim) > skb->len)
657 goto drop;
658
David S. Miller4c9483b2011-03-12 16:22:43 -0500659 if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200660 goto drop;
661 reg_vif_num = mrt->mroute_reg_vif_num;
662
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900663 read_lock(&mrt_lock);
664 if (reg_vif_num >= 0)
Patrick McHardy6bd52142010-05-11 14:40:53 +0200665 reg_dev = mrt->vif6_table[reg_vif_num].dev;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900666 if (reg_dev)
667 dev_hold(reg_dev);
668 read_unlock(&mrt_lock);
669
670 if (reg_dev == NULL)
671 goto drop;
672
673 skb->mac_header = skb->network_header;
674 skb_pull(skb, (u8 *)encap - skb->data);
675 skb_reset_network_header(skb);
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800676 skb->protocol = htons(ETH_P_IPV6);
Cesar Eduardo Barros3e49e6d2011-03-26 05:10:30 +0000677 skb->ip_summed = CHECKSUM_NONE;
Eric Dumazetd19d56d2010-05-17 22:36:55 -0700678
Nicolas Dichtelea231922013-09-02 15:34:58 +0200679 skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
Eric Dumazetd19d56d2010-05-17 22:36:55 -0700680
Eric Dumazetcaf586e2010-09-30 21:06:55 +0000681 netif_rx(skb);
Eric Dumazet8990f462010-09-20 00:12:11 +0000682
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900683 dev_put(reg_dev);
684 return 0;
685 drop:
686 kfree_skb(skb);
687 return 0;
688}
689
Alexey Dobriyan41135cc2009-09-14 12:22:28 +0000690static const struct inet6_protocol pim6_protocol = {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900691 .handler = pim6_rcv,
692};
693
694/* Service routines creating virtual interfaces: PIMREG */
695
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000696static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
697 struct net_device *dev)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900698{
Benjamin Thery8229efd2008-12-10 16:30:15 -0800699 struct net *net = dev_net(dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200700 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -0500701 struct flowi6 fl6 = {
702 .flowi6_oif = dev->ifindex,
Cong Wang6a662712014-04-15 16:25:34 -0700703 .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX,
David S. Miller4c9483b2011-03-12 16:22:43 -0500704 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200705 };
706 int err;
707
David S. Miller4c9483b2011-03-12 16:22:43 -0500708 err = ip6mr_fib_lookup(net, &fl6, &mrt);
Ben Greear67928c42011-09-23 13:11:01 +0000709 if (err < 0) {
710 kfree_skb(skb);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200711 return err;
Ben Greear67928c42011-09-23 13:11:01 +0000712 }
Benjamin Thery8229efd2008-12-10 16:30:15 -0800713
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900714 read_lock(&mrt_lock);
Pavel Emelyanovdc58c782008-05-21 14:17:54 -0700715 dev->stats.tx_bytes += skb->len;
716 dev->stats.tx_packets++;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200717 ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900718 read_unlock(&mrt_lock);
719 kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000720 return NETDEV_TX_OK;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900721}
722
Stephen Hemminger007c3832008-11-20 20:28:35 -0800723static const struct net_device_ops reg_vif_netdev_ops = {
724 .ndo_start_xmit = reg_vif_xmit,
725};
726
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900727static void reg_vif_setup(struct net_device *dev)
728{
729 dev->type = ARPHRD_PIMREG;
730 dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8;
731 dev->flags = IFF_NOARP;
Stephen Hemminger007c3832008-11-20 20:28:35 -0800732 dev->netdev_ops = &reg_vif_netdev_ops;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900733 dev->destructor = free_netdev;
Tom Goff403dbb92009-06-14 03:16:13 -0700734 dev->features |= NETIF_F_NETNS_LOCAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900735}
736
Patrick McHardyd1db2752010-05-11 14:40:55 +0200737static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900738{
739 struct net_device *dev;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200740 char name[IFNAMSIZ];
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900741
Patrick McHardyd1db2752010-05-11 14:40:55 +0200742 if (mrt->id == RT6_TABLE_DFLT)
743 sprintf(name, "pim6reg");
744 else
745 sprintf(name, "pim6reg%u", mrt->id);
746
747 dev = alloc_netdev(0, name, reg_vif_setup);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900748 if (dev == NULL)
749 return NULL;
750
Benjamin Thery8229efd2008-12-10 16:30:15 -0800751 dev_net_set(dev, net);
752
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900753 if (register_netdevice(dev)) {
754 free_netdev(dev);
755 return NULL;
756 }
757 dev->iflink = 0;
758
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900759 if (dev_open(dev))
760 goto failure;
761
Wang Chen7af3db72008-07-14 20:54:54 -0700762 dev_hold(dev);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900763 return dev;
764
765failure:
766 /* allow the register to be completed before unregistering. */
767 rtnl_unlock();
768 rtnl_lock();
769
770 unregister_netdevice(dev);
771 return NULL;
772}
773#endif
774
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900775/*
776 * Delete a VIF entry
777 */
778
Patrick McHardy6bd52142010-05-11 14:40:53 +0200779static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900780{
781 struct mif_device *v;
782 struct net_device *dev;
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800783 struct inet6_dev *in6_dev;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200784
785 if (vifi < 0 || vifi >= mrt->maxvif)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900786 return -EADDRNOTAVAIL;
787
Patrick McHardy6bd52142010-05-11 14:40:53 +0200788 v = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900789
790 write_lock_bh(&mrt_lock);
791 dev = v->dev;
792 v->dev = NULL;
793
794 if (!dev) {
795 write_unlock_bh(&mrt_lock);
796 return -EADDRNOTAVAIL;
797 }
798
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900799#ifdef CONFIG_IPV6_PIMSM_V2
Patrick McHardy6bd52142010-05-11 14:40:53 +0200800 if (vifi == mrt->mroute_reg_vif_num)
801 mrt->mroute_reg_vif_num = -1;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900802#endif
803
Patrick McHardy6bd52142010-05-11 14:40:53 +0200804 if (vifi + 1 == mrt->maxvif) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900805 int tmp;
806 for (tmp = vifi - 1; tmp >= 0; tmp--) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200807 if (MIF_EXISTS(mrt, tmp))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900808 break;
809 }
Patrick McHardy6bd52142010-05-11 14:40:53 +0200810 mrt->maxvif = tmp + 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900811 }
812
813 write_unlock_bh(&mrt_lock);
814
815 dev_set_allmulti(dev, -1);
816
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800817 in6_dev = __in6_dev_get(dev);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000818 if (in6_dev) {
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800819 in6_dev->cnf.mc_forwarding--;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000820 inet6_netconf_notify_devconf(dev_net(dev),
821 NETCONFA_MC_FORWARDING,
822 dev->ifindex, &in6_dev->cnf);
823 }
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800824
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900825 if (v->flags & MIFF_REGISTER)
Eric Dumazetc871e662009-10-28 04:48:11 +0000826 unregister_netdevice_queue(dev, head);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900827
828 dev_put(dev);
829 return 0;
830}
831
Benjamin Thery58701ad2008-12-10 16:22:34 -0800832static inline void ip6mr_cache_free(struct mfc6_cache *c)
833{
Benjamin Thery58701ad2008-12-10 16:22:34 -0800834 kmem_cache_free(mrt_cachep, c);
835}
836
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900837/* Destroy an unresolved cache entry, killing queued skbs
838 and reporting error to netlink readers.
839 */
840
Patrick McHardy6bd52142010-05-11 14:40:53 +0200841static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900842{
Patrick McHardy6bd52142010-05-11 14:40:53 +0200843 struct net *net = read_pnet(&mrt->net);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900844 struct sk_buff *skb;
845
Patrick McHardy6bd52142010-05-11 14:40:53 +0200846 atomic_dec(&mrt->cache_resolve_queue_len);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900847
848 while((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) {
849 if (ipv6_hdr(skb)->version == 0) {
850 struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
851 nlh->nlmsg_type = NLMSG_ERROR;
Hong zhi guo573ce262013-03-27 06:47:04 +0000852 nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900853 skb_trim(skb, nlh->nlmsg_len);
Hong zhi guo573ce262013-03-27 06:47:04 +0000854 ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000855 rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900856 } else
857 kfree_skb(skb);
858 }
859
Benjamin Thery58701ad2008-12-10 16:22:34 -0800860 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900861}
862
863
Patrick McHardyc476efb2010-05-11 14:40:48 +0200864/* Timer process for all the unresolved queue. */
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900865
Patrick McHardy6bd52142010-05-11 14:40:53 +0200866static void ipmr_do_expire_process(struct mr6_table *mrt)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900867{
868 unsigned long now = jiffies;
869 unsigned long expires = 10 * HZ;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200870 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900871
Patrick McHardy6bd52142010-05-11 14:40:53 +0200872 list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900873 if (time_after(c->mfc_un.unres.expires, now)) {
874 /* not yet... */
875 unsigned long interval = c->mfc_un.unres.expires - now;
876 if (interval < expires)
877 expires = interval;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900878 continue;
879 }
880
Patrick McHardyf30a77842010-05-11 14:40:51 +0200881 list_del(&c->list);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +0000882 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200883 ip6mr_destroy_unres(mrt, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900884 }
885
Patrick McHardy6bd52142010-05-11 14:40:53 +0200886 if (!list_empty(&mrt->mfc6_unres_queue))
887 mod_timer(&mrt->ipmr_expire_timer, jiffies + expires);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900888}
889
Patrick McHardyc476efb2010-05-11 14:40:48 +0200890static void ipmr_expire_process(unsigned long arg)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900891{
Patrick McHardy6bd52142010-05-11 14:40:53 +0200892 struct mr6_table *mrt = (struct mr6_table *)arg;
Patrick McHardyc476efb2010-05-11 14:40:48 +0200893
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900894 if (!spin_trylock(&mfc_unres_lock)) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200895 mod_timer(&mrt->ipmr_expire_timer, jiffies + 1);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900896 return;
897 }
898
Patrick McHardy6bd52142010-05-11 14:40:53 +0200899 if (!list_empty(&mrt->mfc6_unres_queue))
900 ipmr_do_expire_process(mrt);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900901
902 spin_unlock(&mfc_unres_lock);
903}
904
905/* Fill oifs list. It is called under write locked mrt_lock. */
906
Patrick McHardy6bd52142010-05-11 14:40:53 +0200907static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache,
Patrick McHardyb5aa30b2010-05-11 14:40:50 +0200908 unsigned char *ttls)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900909{
910 int vifi;
911
Rami Rosen6ac7eb02008-04-10 12:40:10 +0300912 cache->mfc_un.res.minvif = MAXMIFS;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900913 cache->mfc_un.res.maxvif = 0;
Rami Rosen6ac7eb02008-04-10 12:40:10 +0300914 memset(cache->mfc_un.res.ttls, 255, MAXMIFS);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900915
Patrick McHardy6bd52142010-05-11 14:40:53 +0200916 for (vifi = 0; vifi < mrt->maxvif; vifi++) {
917 if (MIF_EXISTS(mrt, vifi) &&
Benjamin Thery4e168802008-12-10 16:15:08 -0800918 ttls[vifi] && ttls[vifi] < 255) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900919 cache->mfc_un.res.ttls[vifi] = ttls[vifi];
920 if (cache->mfc_un.res.minvif > vifi)
921 cache->mfc_un.res.minvif = vifi;
922 if (cache->mfc_un.res.maxvif <= vifi)
923 cache->mfc_un.res.maxvif = vifi + 1;
924 }
925 }
926}
927
Patrick McHardy6bd52142010-05-11 14:40:53 +0200928static int mif6_add(struct net *net, struct mr6_table *mrt,
929 struct mif6ctl *vifc, int mrtsock)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900930{
931 int vifi = vifc->mif6c_mifi;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200932 struct mif_device *v = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900933 struct net_device *dev;
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800934 struct inet6_dev *in6_dev;
Wang Chen5ae7b442008-07-14 20:54:23 -0700935 int err;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900936
937 /* Is vif busy ? */
Patrick McHardy6bd52142010-05-11 14:40:53 +0200938 if (MIF_EXISTS(mrt, vifi))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900939 return -EADDRINUSE;
940
941 switch (vifc->mif6c_flags) {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900942#ifdef CONFIG_IPV6_PIMSM_V2
943 case MIFF_REGISTER:
944 /*
945 * Special Purpose VIF in PIM
946 * All the packets will be sent to the daemon
947 */
Patrick McHardy6bd52142010-05-11 14:40:53 +0200948 if (mrt->mroute_reg_vif_num >= 0)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900949 return -EADDRINUSE;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200950 dev = ip6mr_reg_vif(net, mrt);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900951 if (!dev)
952 return -ENOBUFS;
Wang Chen5ae7b442008-07-14 20:54:23 -0700953 err = dev_set_allmulti(dev, 1);
954 if (err) {
955 unregister_netdevice(dev);
Wang Chen7af3db72008-07-14 20:54:54 -0700956 dev_put(dev);
Wang Chen5ae7b442008-07-14 20:54:23 -0700957 return err;
958 }
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900959 break;
960#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900961 case 0:
Benjamin Thery8229efd2008-12-10 16:30:15 -0800962 dev = dev_get_by_index(net, vifc->mif6c_pifi);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900963 if (!dev)
964 return -EADDRNOTAVAIL;
Wang Chen5ae7b442008-07-14 20:54:23 -0700965 err = dev_set_allmulti(dev, 1);
Wang Chen7af3db72008-07-14 20:54:54 -0700966 if (err) {
967 dev_put(dev);
Wang Chen5ae7b442008-07-14 20:54:23 -0700968 return err;
Wang Chen7af3db72008-07-14 20:54:54 -0700969 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900970 break;
971 default:
972 return -EINVAL;
973 }
974
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800975 in6_dev = __in6_dev_get(dev);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000976 if (in6_dev) {
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800977 in6_dev->cnf.mc_forwarding++;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000978 inet6_netconf_notify_devconf(dev_net(dev),
979 NETCONFA_MC_FORWARDING,
980 dev->ifindex, &in6_dev->cnf);
981 }
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800982
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900983 /*
984 * Fill in the VIF structures
985 */
986 v->rate_limit = vifc->vifc_rate_limit;
987 v->flags = vifc->mif6c_flags;
988 if (!mrtsock)
989 v->flags |= VIFF_STATIC;
990 v->threshold = vifc->vifc_threshold;
991 v->bytes_in = 0;
992 v->bytes_out = 0;
993 v->pkt_in = 0;
994 v->pkt_out = 0;
995 v->link = dev->ifindex;
996 if (v->flags & MIFF_REGISTER)
997 v->link = dev->iflink;
998
999 /* And finish update writing critical data */
1000 write_lock_bh(&mrt_lock);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001001 v->dev = dev;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001002#ifdef CONFIG_IPV6_PIMSM_V2
1003 if (v->flags & MIFF_REGISTER)
Patrick McHardy6bd52142010-05-11 14:40:53 +02001004 mrt->mroute_reg_vif_num = vifi;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001005#endif
Patrick McHardy6bd52142010-05-11 14:40:53 +02001006 if (vifi + 1 > mrt->maxvif)
1007 mrt->maxvif = vifi + 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001008 write_unlock_bh(&mrt_lock);
1009 return 0;
1010}
1011
Patrick McHardy6bd52142010-05-11 14:40:53 +02001012static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001013 const struct in6_addr *origin,
1014 const struct in6_addr *mcastgrp)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001015{
1016 int line = MFC6_HASH(mcastgrp, origin);
1017 struct mfc6_cache *c;
1018
Patrick McHardy6bd52142010-05-11 14:40:53 +02001019 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001020 if (ipv6_addr_equal(&c->mf6c_origin, origin) &&
1021 ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp))
Patrick McHardyf30a77842010-05-11 14:40:51 +02001022 return c;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001023 }
Patrick McHardyf30a77842010-05-11 14:40:51 +02001024 return NULL;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001025}
1026
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001027/* Look for a (*,*,oif) entry */
1028static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt,
1029 mifi_t mifi)
1030{
1031 int line = MFC6_HASH(&in6addr_any, &in6addr_any);
1032 struct mfc6_cache *c;
1033
1034 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
1035 if (ipv6_addr_any(&c->mf6c_origin) &&
1036 ipv6_addr_any(&c->mf6c_mcastgrp) &&
1037 (c->mfc_un.res.ttls[mifi] < 255))
1038 return c;
1039
1040 return NULL;
1041}
1042
1043/* Look for a (*,G) entry */
1044static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt,
1045 struct in6_addr *mcastgrp,
1046 mifi_t mifi)
1047{
1048 int line = MFC6_HASH(mcastgrp, &in6addr_any);
1049 struct mfc6_cache *c, *proxy;
1050
1051 if (ipv6_addr_any(mcastgrp))
1052 goto skip;
1053
1054 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
1055 if (ipv6_addr_any(&c->mf6c_origin) &&
1056 ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) {
1057 if (c->mfc_un.res.ttls[mifi] < 255)
1058 return c;
1059
1060 /* It's ok if the mifi is part of the static tree */
1061 proxy = ip6mr_cache_find_any_parent(mrt,
1062 c->mf6c_parent);
1063 if (proxy && proxy->mfc_un.res.ttls[mifi] < 255)
1064 return c;
1065 }
1066
1067skip:
1068 return ip6mr_cache_find_any_parent(mrt, mifi);
1069}
1070
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001071/*
1072 * Allocate a multicast cache entry
1073 */
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001074static struct mfc6_cache *ip6mr_cache_alloc(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001075{
Joe Perches36cbac52008-12-03 22:27:25 -08001076 struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001077 if (c == NULL)
1078 return NULL;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001079 c->mfc_un.res.minvif = MAXMIFS;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001080 return c;
1081}
1082
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001083static struct mfc6_cache *ip6mr_cache_alloc_unres(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001084{
Joe Perches36cbac52008-12-03 22:27:25 -08001085 struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001086 if (c == NULL)
1087 return NULL;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001088 skb_queue_head_init(&c->mfc_un.unres.unresolved);
1089 c->mfc_un.unres.expires = jiffies + 10 * HZ;
1090 return c;
1091}
1092
1093/*
1094 * A cache entry has gone into a resolved state from queued
1095 */
1096
Patrick McHardy6bd52142010-05-11 14:40:53 +02001097static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt,
1098 struct mfc6_cache *uc, struct mfc6_cache *c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001099{
1100 struct sk_buff *skb;
1101
1102 /*
1103 * Play the pending entries through our router
1104 */
1105
1106 while((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
1107 if (ipv6_hdr(skb)->version == 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001108 struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
1109
Hong zhi guo573ce262013-03-27 06:47:04 +00001110 if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) {
YOSHIFUJI Hideaki549e0282008-04-05 22:17:39 +09001111 nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001112 } else {
1113 nlh->nlmsg_type = NLMSG_ERROR;
Hong zhi guo573ce262013-03-27 06:47:04 +00001114 nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001115 skb_trim(skb, nlh->nlmsg_len);
Hong zhi guo573ce262013-03-27 06:47:04 +00001116 ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001117 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00001118 rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001119 } else
Patrick McHardy6bd52142010-05-11 14:40:53 +02001120 ip6_mr_forward(net, mrt, skb, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001121 }
1122}
1123
1124/*
1125 * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd
1126 * expects the following bizarre scheme.
1127 *
1128 * Called under mrt_lock.
1129 */
1130
Patrick McHardy6bd52142010-05-11 14:40:53 +02001131static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
1132 mifi_t mifi, int assert)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001133{
1134 struct sk_buff *skb;
1135 struct mrt6msg *msg;
1136 int ret;
1137
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001138#ifdef CONFIG_IPV6_PIMSM_V2
1139 if (assert == MRT6MSG_WHOLEPKT)
1140 skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt)
1141 +sizeof(*msg));
1142 else
1143#endif
1144 skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001145
1146 if (!skb)
1147 return -ENOBUFS;
1148
1149 /* I suppose that internal messages
1150 * do not require checksums */
1151
1152 skb->ip_summed = CHECKSUM_UNNECESSARY;
1153
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001154#ifdef CONFIG_IPV6_PIMSM_V2
1155 if (assert == MRT6MSG_WHOLEPKT) {
1156 /* Ugly, but we have no choice with this interface.
1157 Duplicate old header, fix length etc.
1158 And all this only to mangle msg->im6_msgtype and
1159 to set msg->im6_mbz to "mbz" :-)
1160 */
1161 skb_push(skb, -skb_network_offset(pkt));
1162
1163 skb_push(skb, sizeof(*msg));
1164 skb_reset_transport_header(skb);
1165 msg = (struct mrt6msg *)skb_transport_header(skb);
1166 msg->im6_mbz = 0;
1167 msg->im6_msgtype = MRT6MSG_WHOLEPKT;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001168 msg->im6_mif = mrt->mroute_reg_vif_num;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001169 msg->im6_pad = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001170 msg->im6_src = ipv6_hdr(pkt)->saddr;
1171 msg->im6_dst = ipv6_hdr(pkt)->daddr;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001172
1173 skb->ip_summed = CHECKSUM_UNNECESSARY;
1174 } else
1175#endif
1176 {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001177 /*
1178 * Copy the IP header
1179 */
1180
1181 skb_put(skb, sizeof(struct ipv6hdr));
1182 skb_reset_network_header(skb);
1183 skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr));
1184
1185 /*
1186 * Add our header
1187 */
1188 skb_put(skb, sizeof(*msg));
1189 skb_reset_transport_header(skb);
1190 msg = (struct mrt6msg *)skb_transport_header(skb);
1191
1192 msg->im6_mbz = 0;
1193 msg->im6_msgtype = assert;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001194 msg->im6_mif = mifi;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001195 msg->im6_pad = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001196 msg->im6_src = ipv6_hdr(pkt)->saddr;
1197 msg->im6_dst = ipv6_hdr(pkt)->daddr;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001198
Eric Dumazetadf30902009-06-02 05:19:30 +00001199 skb_dst_set(skb, dst_clone(skb_dst(pkt)));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001200 skb->ip_summed = CHECKSUM_UNNECESSARY;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001201 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001202
Patrick McHardy6bd52142010-05-11 14:40:53 +02001203 if (mrt->mroute6_sk == NULL) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001204 kfree_skb(skb);
1205 return -EINVAL;
1206 }
1207
1208 /*
1209 * Deliver to user space multicast routing algorithms
1210 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001211 ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb);
Benjamin Therybd91b8b2008-12-10 16:07:08 -08001212 if (ret < 0) {
Joe Perchese87cc472012-05-13 21:56:26 +00001213 net_warn_ratelimited("mroute6: pending queue full, dropping entries\n");
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001214 kfree_skb(skb);
1215 }
1216
1217 return ret;
1218}
1219
1220/*
1221 * Queue a packet for resolution. It gets locked cache entry!
1222 */
1223
1224static int
Patrick McHardy6bd52142010-05-11 14:40:53 +02001225ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001226{
Patrick McHardyf30a77842010-05-11 14:40:51 +02001227 bool found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001228 int err;
1229 struct mfc6_cache *c;
1230
1231 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001232 list_for_each_entry(c, &mrt->mfc6_unres_queue, list) {
Patrick McHardyc476efb2010-05-11 14:40:48 +02001233 if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) &&
Patrick McHardyf30a77842010-05-11 14:40:51 +02001234 ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) {
1235 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001236 break;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001237 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001238 }
1239
Patrick McHardyf30a77842010-05-11 14:40:51 +02001240 if (!found) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001241 /*
1242 * Create a new entry if allowable
1243 */
1244
Patrick McHardy6bd52142010-05-11 14:40:53 +02001245 if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001246 (c = ip6mr_cache_alloc_unres()) == NULL) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001247 spin_unlock_bh(&mfc_unres_lock);
1248
1249 kfree_skb(skb);
1250 return -ENOBUFS;
1251 }
1252
1253 /*
1254 * Fill in the new cache entry
1255 */
1256 c->mf6c_parent = -1;
1257 c->mf6c_origin = ipv6_hdr(skb)->saddr;
1258 c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr;
1259
1260 /*
1261 * Reflect first query at pim6sd
1262 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001263 err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE);
Benjamin Thery8229efd2008-12-10 16:30:15 -08001264 if (err < 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001265 /* If the report failed throw the cache entry
1266 out - Brad Parker
1267 */
1268 spin_unlock_bh(&mfc_unres_lock);
1269
Benjamin Thery58701ad2008-12-10 16:22:34 -08001270 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001271 kfree_skb(skb);
1272 return err;
1273 }
1274
Patrick McHardy6bd52142010-05-11 14:40:53 +02001275 atomic_inc(&mrt->cache_resolve_queue_len);
1276 list_add(&c->list, &mrt->mfc6_unres_queue);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001277 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001278
Patrick McHardy6bd52142010-05-11 14:40:53 +02001279 ipmr_do_expire_process(mrt);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001280 }
1281
1282 /*
1283 * See if we can append the packet
1284 */
1285 if (c->mfc_un.unres.unresolved.qlen > 3) {
1286 kfree_skb(skb);
1287 err = -ENOBUFS;
1288 } else {
1289 skb_queue_tail(&c->mfc_un.unres.unresolved, skb);
1290 err = 0;
1291 }
1292
1293 spin_unlock_bh(&mfc_unres_lock);
1294 return err;
1295}
1296
1297/*
1298 * MFC6 cache manipulation by user space
1299 */
1300
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001301static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc,
1302 int parent)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001303{
1304 int line;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001305 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001306
1307 line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
1308
Patrick McHardy6bd52142010-05-11 14:40:53 +02001309 list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001310 if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001311 ipv6_addr_equal(&c->mf6c_mcastgrp,
1312 &mfc->mf6cc_mcastgrp.sin6_addr) &&
1313 (parent == -1 || parent == c->mf6c_parent)) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001314 write_lock_bh(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001315 list_del(&c->list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001316 write_unlock_bh(&mrt_lock);
1317
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001318 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001319 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001320 return 0;
1321 }
1322 }
1323 return -ENOENT;
1324}
1325
1326static int ip6mr_device_event(struct notifier_block *this,
1327 unsigned long event, void *ptr)
1328{
Jiri Pirko351638e2013-05-28 01:30:21 +00001329 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Benjamin Thery8229efd2008-12-10 16:30:15 -08001330 struct net *net = dev_net(dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001331 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001332 struct mif_device *v;
1333 int ct;
Eric Dumazetc871e662009-10-28 04:48:11 +00001334 LIST_HEAD(list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001335
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001336 if (event != NETDEV_UNREGISTER)
1337 return NOTIFY_DONE;
1338
Patrick McHardyd1db2752010-05-11 14:40:55 +02001339 ip6mr_for_each_table(mrt, net) {
1340 v = &mrt->vif6_table[0];
1341 for (ct = 0; ct < mrt->maxvif; ct++, v++) {
1342 if (v->dev == dev)
1343 mif6_delete(mrt, ct, &list);
1344 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001345 }
Eric Dumazetc871e662009-10-28 04:48:11 +00001346 unregister_netdevice_many(&list);
1347
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001348 return NOTIFY_DONE;
1349}
1350
1351static struct notifier_block ip6_mr_notifier = {
1352 .notifier_call = ip6mr_device_event
1353};
1354
1355/*
1356 * Setup for IP multicast routing
1357 */
1358
Benjamin Thery4e168802008-12-10 16:15:08 -08001359static int __net_init ip6mr_net_init(struct net *net)
1360{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001361 int err;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001362
Patrick McHardyd1db2752010-05-11 14:40:55 +02001363 err = ip6mr_rules_init(net);
1364 if (err < 0)
Benjamin Thery4e168802008-12-10 16:15:08 -08001365 goto fail;
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001366
1367#ifdef CONFIG_PROC_FS
1368 err = -ENOMEM;
Gao fengd4beaa62013-02-18 01:34:54 +00001369 if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops))
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001370 goto proc_vif_fail;
Gao fengd4beaa62013-02-18 01:34:54 +00001371 if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops))
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001372 goto proc_cache_fail;
1373#endif
Patrick McHardy6bd52142010-05-11 14:40:53 +02001374
Benjamin Thery4a6258a2008-12-10 16:24:07 -08001375 return 0;
1376
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001377#ifdef CONFIG_PROC_FS
1378proc_cache_fail:
Gao fengece31ff2013-02-18 01:34:56 +00001379 remove_proc_entry("ip6_mr_vif", net->proc_net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001380proc_vif_fail:
Patrick McHardyd1db2752010-05-11 14:40:55 +02001381 ip6mr_rules_exit(net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001382#endif
Benjamin Thery4e168802008-12-10 16:15:08 -08001383fail:
1384 return err;
1385}
1386
1387static void __net_exit ip6mr_net_exit(struct net *net)
1388{
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001389#ifdef CONFIG_PROC_FS
Gao fengece31ff2013-02-18 01:34:56 +00001390 remove_proc_entry("ip6_mr_cache", net->proc_net);
1391 remove_proc_entry("ip6_mr_vif", net->proc_net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001392#endif
Patrick McHardyd1db2752010-05-11 14:40:55 +02001393 ip6mr_rules_exit(net);
Benjamin Thery4e168802008-12-10 16:15:08 -08001394}
1395
1396static struct pernet_operations ip6mr_net_ops = {
1397 .init = ip6mr_net_init,
1398 .exit = ip6mr_net_exit,
1399};
1400
Wang Chen623d1a12008-07-03 12:13:30 +08001401int __init ip6_mr_init(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001402{
Wang Chen623d1a12008-07-03 12:13:30 +08001403 int err;
1404
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001405 mrt_cachep = kmem_cache_create("ip6_mrt_cache",
1406 sizeof(struct mfc6_cache),
1407 0, SLAB_HWCACHE_ALIGN,
1408 NULL);
1409 if (!mrt_cachep)
Wang Chen623d1a12008-07-03 12:13:30 +08001410 return -ENOMEM;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001411
Benjamin Thery4e168802008-12-10 16:15:08 -08001412 err = register_pernet_subsys(&ip6mr_net_ops);
1413 if (err)
1414 goto reg_pernet_fail;
1415
Wang Chen623d1a12008-07-03 12:13:30 +08001416 err = register_netdevice_notifier(&ip6_mr_notifier);
1417 if (err)
1418 goto reg_notif_fail;
Tom Goff403dbb92009-06-14 03:16:13 -07001419#ifdef CONFIG_IPV6_PIMSM_V2
1420 if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00001421 pr_err("%s: can't add PIM protocol\n", __func__);
Tom Goff403dbb92009-06-14 03:16:13 -07001422 err = -EAGAIN;
1423 goto add_proto_fail;
1424 }
1425#endif
Greg Rosec7ac8672011-06-10 01:27:09 +00001426 rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL,
1427 ip6mr_rtm_dumproute, NULL);
Wang Chen623d1a12008-07-03 12:13:30 +08001428 return 0;
Tom Goff403dbb92009-06-14 03:16:13 -07001429#ifdef CONFIG_IPV6_PIMSM_V2
1430add_proto_fail:
1431 unregister_netdevice_notifier(&ip6_mr_notifier);
1432#endif
Benjamin Thery87b30a62008-11-10 16:34:11 -08001433reg_notif_fail:
Benjamin Thery4e168802008-12-10 16:15:08 -08001434 unregister_pernet_subsys(&ip6mr_net_ops);
1435reg_pernet_fail:
Benjamin Thery87b30a62008-11-10 16:34:11 -08001436 kmem_cache_destroy(mrt_cachep);
Wang Chen623d1a12008-07-03 12:13:30 +08001437 return err;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001438}
1439
Wang Chen623d1a12008-07-03 12:13:30 +08001440void ip6_mr_cleanup(void)
1441{
Wang Chen623d1a12008-07-03 12:13:30 +08001442 unregister_netdevice_notifier(&ip6_mr_notifier);
Benjamin Thery4e168802008-12-10 16:15:08 -08001443 unregister_pernet_subsys(&ip6mr_net_ops);
Wang Chen623d1a12008-07-03 12:13:30 +08001444 kmem_cache_destroy(mrt_cachep);
1445}
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001446
Patrick McHardy6bd52142010-05-11 14:40:53 +02001447static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt,
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001448 struct mf6cctl *mfc, int mrtsock, int parent)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001449{
Patrick McHardyf30a77842010-05-11 14:40:51 +02001450 bool found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001451 int line;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001452 struct mfc6_cache *uc, *c;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001453 unsigned char ttls[MAXMIFS];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001454 int i;
1455
Patrick McHardya50436f22010-03-17 06:04:14 +00001456 if (mfc->mf6cc_parent >= MAXMIFS)
1457 return -ENFILE;
1458
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001459 memset(ttls, 255, MAXMIFS);
1460 for (i = 0; i < MAXMIFS; i++) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001461 if (IF_ISSET(i, &mfc->mf6cc_ifset))
1462 ttls[i] = 1;
1463
1464 }
1465
1466 line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
1467
Patrick McHardy6bd52142010-05-11 14:40:53 +02001468 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001469 if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001470 ipv6_addr_equal(&c->mf6c_mcastgrp,
1471 &mfc->mf6cc_mcastgrp.sin6_addr) &&
1472 (parent == -1 || parent == mfc->mf6cc_parent)) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001473 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001474 break;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001475 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001476 }
1477
Patrick McHardyf30a77842010-05-11 14:40:51 +02001478 if (found) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001479 write_lock_bh(&mrt_lock);
1480 c->mf6c_parent = mfc->mf6cc_parent;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001481 ip6mr_update_thresholds(mrt, c, ttls);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001482 if (!mrtsock)
1483 c->mfc_flags |= MFC_STATIC;
1484 write_unlock_bh(&mrt_lock);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001485 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001486 return 0;
1487 }
1488
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001489 if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) &&
1490 !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001491 return -EINVAL;
1492
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001493 c = ip6mr_cache_alloc();
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001494 if (c == NULL)
1495 return -ENOMEM;
1496
1497 c->mf6c_origin = mfc->mf6cc_origin.sin6_addr;
1498 c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr;
1499 c->mf6c_parent = mfc->mf6cc_parent;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001500 ip6mr_update_thresholds(mrt, c, ttls);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001501 if (!mrtsock)
1502 c->mfc_flags |= MFC_STATIC;
1503
1504 write_lock_bh(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001505 list_add(&c->list, &mrt->mfc6_cache_array[line]);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001506 write_unlock_bh(&mrt_lock);
1507
1508 /*
1509 * Check to see if we resolved a queued list. If so we
1510 * need to send on the frames and tidy up.
1511 */
Patrick McHardyf30a77842010-05-11 14:40:51 +02001512 found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001513 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001514 list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) {
Patrick McHardyc476efb2010-05-11 14:40:48 +02001515 if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) &&
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001516 ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001517 list_del(&uc->list);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001518 atomic_dec(&mrt->cache_resolve_queue_len);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001519 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001520 break;
1521 }
1522 }
Patrick McHardy6bd52142010-05-11 14:40:53 +02001523 if (list_empty(&mrt->mfc6_unres_queue))
1524 del_timer(&mrt->ipmr_expire_timer);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001525 spin_unlock_bh(&mfc_unres_lock);
1526
Patrick McHardyf30a77842010-05-11 14:40:51 +02001527 if (found) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02001528 ip6mr_cache_resolve(net, mrt, uc, c);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001529 ip6mr_cache_free(uc);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001530 }
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001531 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001532 return 0;
1533}
1534
1535/*
1536 * Close the multicast socket, and clear the vif tables etc
1537 */
1538
Patrick McHardy6bd52142010-05-11 14:40:53 +02001539static void mroute_clean_tables(struct mr6_table *mrt)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001540{
1541 int i;
Eric Dumazetc871e662009-10-28 04:48:11 +00001542 LIST_HEAD(list);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001543 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001544
1545 /*
1546 * Shut down all active vif entries
1547 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001548 for (i = 0; i < mrt->maxvif; i++) {
1549 if (!(mrt->vif6_table[i].flags & VIFF_STATIC))
1550 mif6_delete(mrt, i, &list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001551 }
Eric Dumazetc871e662009-10-28 04:48:11 +00001552 unregister_netdevice_many(&list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001553
1554 /*
1555 * Wipe the cache
1556 */
Benjamin Thery4a6258a2008-12-10 16:24:07 -08001557 for (i = 0; i < MFC6_LINES; i++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02001558 list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001559 if (c->mfc_flags & MFC_STATIC)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001560 continue;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001561 write_lock_bh(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001562 list_del(&c->list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001563 write_unlock_bh(&mrt_lock);
1564
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001565 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001566 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001567 }
1568 }
1569
Patrick McHardy6bd52142010-05-11 14:40:53 +02001570 if (atomic_read(&mrt->cache_resolve_queue_len) != 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001571 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001572 list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001573 list_del(&c->list);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001574 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001575 ip6mr_destroy_unres(mrt, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001576 }
1577 spin_unlock_bh(&mfc_unres_lock);
1578 }
1579}
1580
Patrick McHardy6bd52142010-05-11 14:40:53 +02001581static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001582{
1583 int err = 0;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001584 struct net *net = sock_net(sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001585
1586 rtnl_lock();
1587 write_lock_bh(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001588 if (likely(mrt->mroute6_sk == NULL)) {
1589 mrt->mroute6_sk = sk;
Thomas Goff1d6e55f2009-01-27 22:39:59 -08001590 net->ipv6.devconf_all->mc_forwarding++;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +00001591 inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING,
1592 NETCONFA_IFINDEX_ALL,
1593 net->ipv6.devconf_all);
Thomas Goff1d6e55f2009-01-27 22:39:59 -08001594 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001595 else
1596 err = -EADDRINUSE;
1597 write_unlock_bh(&mrt_lock);
1598
1599 rtnl_unlock();
1600
1601 return err;
1602}
1603
1604int ip6mr_sk_done(struct sock *sk)
1605{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001606 int err = -EACCES;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001607 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001608 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001609
1610 rtnl_lock();
Patrick McHardyd1db2752010-05-11 14:40:55 +02001611 ip6mr_for_each_table(mrt, net) {
1612 if (sk == mrt->mroute6_sk) {
1613 write_lock_bh(&mrt_lock);
1614 mrt->mroute6_sk = NULL;
1615 net->ipv6.devconf_all->mc_forwarding--;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +00001616 inet6_netconf_notify_devconf(net,
1617 NETCONFA_MC_FORWARDING,
1618 NETCONFA_IFINDEX_ALL,
1619 net->ipv6.devconf_all);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001620 write_unlock_bh(&mrt_lock);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001621
Patrick McHardyd1db2752010-05-11 14:40:55 +02001622 mroute_clean_tables(mrt);
1623 err = 0;
1624 break;
1625 }
1626 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001627 rtnl_unlock();
1628
1629 return err;
1630}
1631
Patrick McHardyd1db2752010-05-11 14:40:55 +02001632struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
Patrick McHardy6bd52142010-05-11 14:40:53 +02001633{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001634 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -05001635 struct flowi6 fl6 = {
Julian Anastasove374c612014-04-28 10:51:56 +03001636 .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX,
David S. Miller4c9483b2011-03-12 16:22:43 -05001637 .flowi6_oif = skb->dev->ifindex,
1638 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +02001639 };
1640
David S. Miller4c9483b2011-03-12 16:22:43 -05001641 if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
Patrick McHardyd1db2752010-05-11 14:40:55 +02001642 return NULL;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001643
1644 return mrt->mroute6_sk;
1645}
1646
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001647/*
1648 * Socket options and virtual interface manipulation. The whole
1649 * virtual interface system is a complete heap, but unfortunately
1650 * that's how BSD mrouted happens to think. Maybe one day with a proper
1651 * MOSPF/PIM router set up we can clean this up.
1652 */
1653
David S. Millerb7058842009-09-30 16:12:20 -07001654int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001655{
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001656 int ret, parent = 0;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001657 struct mif6ctl vif;
1658 struct mf6cctl mfc;
1659 mifi_t mifi;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001660 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001661 struct mr6_table *mrt;
1662
1663 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
1664 if (mrt == NULL)
1665 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001666
1667 if (optname != MRT6_INIT) {
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00001668 if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001669 return -EACCES;
1670 }
1671
1672 switch (optname) {
1673 case MRT6_INIT:
1674 if (sk->sk_type != SOCK_RAW ||
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001675 inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001676 return -EOPNOTSUPP;
1677 if (optlen < sizeof(int))
1678 return -EINVAL;
1679
Patrick McHardy6bd52142010-05-11 14:40:53 +02001680 return ip6mr_sk_init(mrt, sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001681
1682 case MRT6_DONE:
1683 return ip6mr_sk_done(sk);
1684
1685 case MRT6_ADD_MIF:
1686 if (optlen < sizeof(vif))
1687 return -EINVAL;
1688 if (copy_from_user(&vif, optval, sizeof(vif)))
1689 return -EFAULT;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001690 if (vif.mif6c_mifi >= MAXMIFS)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001691 return -ENFILE;
1692 rtnl_lock();
Patrick McHardy6bd52142010-05-11 14:40:53 +02001693 ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001694 rtnl_unlock();
1695 return ret;
1696
1697 case MRT6_DEL_MIF:
1698 if (optlen < sizeof(mifi_t))
1699 return -EINVAL;
1700 if (copy_from_user(&mifi, optval, sizeof(mifi_t)))
1701 return -EFAULT;
1702 rtnl_lock();
Patrick McHardy6bd52142010-05-11 14:40:53 +02001703 ret = mif6_delete(mrt, mifi, NULL);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001704 rtnl_unlock();
1705 return ret;
1706
1707 /*
1708 * Manipulate the forwarding caches. These live
1709 * in a sort of kernel/user symbiosis.
1710 */
1711 case MRT6_ADD_MFC:
1712 case MRT6_DEL_MFC:
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001713 parent = -1;
1714 case MRT6_ADD_MFC_PROXY:
1715 case MRT6_DEL_MFC_PROXY:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001716 if (optlen < sizeof(mfc))
1717 return -EINVAL;
1718 if (copy_from_user(&mfc, optval, sizeof(mfc)))
1719 return -EFAULT;
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001720 if (parent == 0)
1721 parent = mfc.mf6cc_parent;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001722 rtnl_lock();
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001723 if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY)
1724 ret = ip6mr_mfc_delete(mrt, &mfc, parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001725 else
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001726 ret = ip6mr_mfc_add(net, mrt, &mfc,
1727 sk == mrt->mroute6_sk, parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001728 rtnl_unlock();
1729 return ret;
1730
1731 /*
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001732 * Control PIM assert (to activate pim will activate assert)
1733 */
1734 case MRT6_ASSERT:
1735 {
1736 int v;
Joe Perches03f52a02012-11-25 18:26:34 +00001737
1738 if (optlen != sizeof(v))
1739 return -EINVAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001740 if (get_user(v, (int __user *)optval))
1741 return -EFAULT;
Joe Perches53d68412012-11-25 09:35:30 +00001742 mrt->mroute_do_assert = v;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001743 return 0;
1744 }
1745
1746#ifdef CONFIG_IPV6_PIMSM_V2
1747 case MRT6_PIM:
1748 {
YOSHIFUJI Hideakia9f83bf2008-04-10 15:41:28 +09001749 int v;
Joe Perches03f52a02012-11-25 18:26:34 +00001750
1751 if (optlen != sizeof(v))
1752 return -EINVAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001753 if (get_user(v, (int __user *)optval))
1754 return -EFAULT;
1755 v = !!v;
1756 rtnl_lock();
1757 ret = 0;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001758 if (v != mrt->mroute_do_pim) {
1759 mrt->mroute_do_pim = v;
1760 mrt->mroute_do_assert = v;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001761 }
1762 rtnl_unlock();
1763 return ret;
1764 }
1765
1766#endif
Patrick McHardyd1db2752010-05-11 14:40:55 +02001767#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
1768 case MRT6_TABLE:
1769 {
1770 u32 v;
1771
1772 if (optlen != sizeof(u32))
1773 return -EINVAL;
1774 if (get_user(v, (u32 __user *)optval))
1775 return -EFAULT;
Dan Carpenter75356a82013-01-23 20:38:34 +00001776 /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */
1777 if (v != RT_TABLE_DEFAULT && v >= 100000000)
1778 return -EINVAL;
Patrick McHardyd1db2752010-05-11 14:40:55 +02001779 if (sk == mrt->mroute6_sk)
1780 return -EBUSY;
1781
1782 rtnl_lock();
1783 ret = 0;
1784 if (!ip6mr_new_table(net, v))
1785 ret = -ENOMEM;
1786 raw6_sk(sk)->ip6mr_table = v;
1787 rtnl_unlock();
1788 return ret;
1789 }
1790#endif
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001791 /*
Rami Rosen7d120c52008-04-23 14:35:13 +03001792 * Spurious command, or MRT6_VERSION which you cannot
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001793 * set.
1794 */
1795 default:
1796 return -ENOPROTOOPT;
1797 }
1798}
1799
1800/*
1801 * Getsock opt support for the multicast routing system.
1802 */
1803
1804int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
1805 int __user *optlen)
1806{
1807 int olr;
1808 int val;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001809 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001810 struct mr6_table *mrt;
1811
1812 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
1813 if (mrt == NULL)
1814 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001815
1816 switch (optname) {
1817 case MRT6_VERSION:
1818 val = 0x0305;
1819 break;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001820#ifdef CONFIG_IPV6_PIMSM_V2
1821 case MRT6_PIM:
Patrick McHardy6bd52142010-05-11 14:40:53 +02001822 val = mrt->mroute_do_pim;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001823 break;
1824#endif
1825 case MRT6_ASSERT:
Patrick McHardy6bd52142010-05-11 14:40:53 +02001826 val = mrt->mroute_do_assert;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001827 break;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001828 default:
1829 return -ENOPROTOOPT;
1830 }
1831
1832 if (get_user(olr, optlen))
1833 return -EFAULT;
1834
1835 olr = min_t(int, olr, sizeof(int));
1836 if (olr < 0)
1837 return -EINVAL;
1838
1839 if (put_user(olr, optlen))
1840 return -EFAULT;
1841 if (copy_to_user(optval, &val, olr))
1842 return -EFAULT;
1843 return 0;
1844}
1845
1846/*
1847 * The IP multicast ioctl support routines.
1848 */
1849
1850int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
1851{
1852 struct sioc_sg_req6 sr;
1853 struct sioc_mif_req6 vr;
1854 struct mif_device *vif;
1855 struct mfc6_cache *c;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001856 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001857 struct mr6_table *mrt;
1858
1859 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
1860 if (mrt == NULL)
1861 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001862
1863 switch (cmd) {
1864 case SIOCGETMIFCNT_IN6:
1865 if (copy_from_user(&vr, arg, sizeof(vr)))
1866 return -EFAULT;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001867 if (vr.mifi >= mrt->maxvif)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001868 return -EINVAL;
1869 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001870 vif = &mrt->vif6_table[vr.mifi];
1871 if (MIF_EXISTS(mrt, vr.mifi)) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001872 vr.icount = vif->pkt_in;
1873 vr.ocount = vif->pkt_out;
1874 vr.ibytes = vif->bytes_in;
1875 vr.obytes = vif->bytes_out;
1876 read_unlock(&mrt_lock);
1877
1878 if (copy_to_user(arg, &vr, sizeof(vr)))
1879 return -EFAULT;
1880 return 0;
1881 }
1882 read_unlock(&mrt_lock);
1883 return -EADDRNOTAVAIL;
1884 case SIOCGETSGCNT_IN6:
1885 if (copy_from_user(&sr, arg, sizeof(sr)))
1886 return -EFAULT;
1887
1888 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001889 c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001890 if (c) {
1891 sr.pktcnt = c->mfc_un.res.pkt;
1892 sr.bytecnt = c->mfc_un.res.bytes;
1893 sr.wrong_if = c->mfc_un.res.wrong_if;
1894 read_unlock(&mrt_lock);
1895
1896 if (copy_to_user(arg, &sr, sizeof(sr)))
1897 return -EFAULT;
1898 return 0;
1899 }
1900 read_unlock(&mrt_lock);
1901 return -EADDRNOTAVAIL;
1902 default:
1903 return -ENOIOCTLCMD;
1904 }
1905}
1906
David S. Millere2d57762011-02-03 17:59:32 -08001907#ifdef CONFIG_COMPAT
1908struct compat_sioc_sg_req6 {
1909 struct sockaddr_in6 src;
1910 struct sockaddr_in6 grp;
1911 compat_ulong_t pktcnt;
1912 compat_ulong_t bytecnt;
1913 compat_ulong_t wrong_if;
1914};
1915
1916struct compat_sioc_mif_req6 {
1917 mifi_t mifi;
1918 compat_ulong_t icount;
1919 compat_ulong_t ocount;
1920 compat_ulong_t ibytes;
1921 compat_ulong_t obytes;
1922};
1923
1924int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
1925{
1926 struct compat_sioc_sg_req6 sr;
1927 struct compat_sioc_mif_req6 vr;
1928 struct mif_device *vif;
1929 struct mfc6_cache *c;
1930 struct net *net = sock_net(sk);
1931 struct mr6_table *mrt;
1932
1933 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
1934 if (mrt == NULL)
1935 return -ENOENT;
1936
1937 switch (cmd) {
1938 case SIOCGETMIFCNT_IN6:
1939 if (copy_from_user(&vr, arg, sizeof(vr)))
1940 return -EFAULT;
1941 if (vr.mifi >= mrt->maxvif)
1942 return -EINVAL;
1943 read_lock(&mrt_lock);
1944 vif = &mrt->vif6_table[vr.mifi];
1945 if (MIF_EXISTS(mrt, vr.mifi)) {
1946 vr.icount = vif->pkt_in;
1947 vr.ocount = vif->pkt_out;
1948 vr.ibytes = vif->bytes_in;
1949 vr.obytes = vif->bytes_out;
1950 read_unlock(&mrt_lock);
1951
1952 if (copy_to_user(arg, &vr, sizeof(vr)))
1953 return -EFAULT;
1954 return 0;
1955 }
1956 read_unlock(&mrt_lock);
1957 return -EADDRNOTAVAIL;
1958 case SIOCGETSGCNT_IN6:
1959 if (copy_from_user(&sr, arg, sizeof(sr)))
1960 return -EFAULT;
1961
1962 read_lock(&mrt_lock);
1963 c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
1964 if (c) {
1965 sr.pktcnt = c->mfc_un.res.pkt;
1966 sr.bytecnt = c->mfc_un.res.bytes;
1967 sr.wrong_if = c->mfc_un.res.wrong_if;
1968 read_unlock(&mrt_lock);
1969
1970 if (copy_to_user(arg, &sr, sizeof(sr)))
1971 return -EFAULT;
1972 return 0;
1973 }
1974 read_unlock(&mrt_lock);
1975 return -EADDRNOTAVAIL;
1976 default:
1977 return -ENOIOCTLCMD;
1978 }
1979}
1980#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001981
1982static inline int ip6mr_forward2_finish(struct sk_buff *skb)
1983{
Eric Dumazetadf30902009-06-02 05:19:30 +00001984 IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
Denis V. Lunev483a47d2008-10-08 11:09:27 -07001985 IPSTATS_MIB_OUTFORWDATAGRAMS);
Vincent Bernat2d8dbb02012-06-05 03:41:42 +00001986 IP6_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
1987 IPSTATS_MIB_OUTOCTETS, skb->len);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001988 return dst_output(skb);
1989}
1990
1991/*
1992 * Processing handlers for ip6mr_forward
1993 */
1994
Patrick McHardy6bd52142010-05-11 14:40:53 +02001995static int ip6mr_forward2(struct net *net, struct mr6_table *mrt,
1996 struct sk_buff *skb, struct mfc6_cache *c, int vifi)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001997{
1998 struct ipv6hdr *ipv6h;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001999 struct mif_device *vif = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002000 struct net_device *dev;
2001 struct dst_entry *dst;
David S. Miller4c9483b2011-03-12 16:22:43 -05002002 struct flowi6 fl6;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002003
2004 if (vif->dev == NULL)
2005 goto out_free;
2006
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002007#ifdef CONFIG_IPV6_PIMSM_V2
2008 if (vif->flags & MIFF_REGISTER) {
2009 vif->pkt_out++;
2010 vif->bytes_out += skb->len;
Pavel Emelyanovdc58c782008-05-21 14:17:54 -07002011 vif->dev->stats.tx_bytes += skb->len;
2012 vif->dev->stats.tx_packets++;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002013 ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT);
Ilpo Järvinen8da73b72008-12-14 23:15:49 -08002014 goto out_free;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002015 }
2016#endif
2017
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002018 ipv6h = ipv6_hdr(skb);
2019
David S. Miller4c9483b2011-03-12 16:22:43 -05002020 fl6 = (struct flowi6) {
2021 .flowi6_oif = vif->link,
2022 .daddr = ipv6h->daddr,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002023 };
2024
David S. Miller4c9483b2011-03-12 16:22:43 -05002025 dst = ip6_route_output(net, NULL, &fl6);
RongQing.Li5095d642012-02-21 22:10:49 +00002026 if (dst->error) {
2027 dst_release(dst);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002028 goto out_free;
RongQing.Li5095d642012-02-21 22:10:49 +00002029 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002030
Eric Dumazetadf30902009-06-02 05:19:30 +00002031 skb_dst_drop(skb);
2032 skb_dst_set(skb, dst);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002033
2034 /*
2035 * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
2036 * not only before forwarding, but after forwarding on all output
2037 * interfaces. It is clear, if mrouter runs a multicasting
2038 * program, it should receive packets not depending to what interface
2039 * program is joined.
2040 * If we will not make it, the program will have to join on all
2041 * interfaces. On the other hand, multihoming host (or router, but
2042 * not mrouter) cannot join to more than one interface - it will
2043 * result in receiving multiple packets.
2044 */
2045 dev = vif->dev;
2046 skb->dev = dev;
2047 vif->pkt_out++;
2048 vif->bytes_out += skb->len;
2049
2050 /* We are about to write */
2051 /* XXX: extension headers? */
2052 if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev)))
2053 goto out_free;
2054
2055 ipv6h = ipv6_hdr(skb);
2056 ipv6h->hop_limit--;
2057
2058 IP6CB(skb)->flags |= IP6SKB_FORWARDED;
2059
Jan Engelhardtb2e0b382010-03-23 04:09:07 +01002060 return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, skb, skb->dev, dev,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002061 ip6mr_forward2_finish);
2062
2063out_free:
2064 kfree_skb(skb);
2065 return 0;
2066}
2067
Patrick McHardy6bd52142010-05-11 14:40:53 +02002068static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002069{
2070 int ct;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002071
2072 for (ct = mrt->maxvif - 1; ct >= 0; ct--) {
2073 if (mrt->vif6_table[ct].dev == dev)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002074 break;
2075 }
2076 return ct;
2077}
2078
Rami Rosen2b52c3a2013-07-21 03:00:31 +03002079static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
2080 struct sk_buff *skb, struct mfc6_cache *cache)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002081{
2082 int psend = -1;
2083 int vif, ct;
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002084 int true_vifi = ip6mr_find_vif(mrt, skb->dev);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002085
2086 vif = cache->mf6c_parent;
2087 cache->mfc_un.res.pkt++;
2088 cache->mfc_un.res.bytes += skb->len;
2089
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002090 if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) {
2091 struct mfc6_cache *cache_proxy;
2092
2093 /* For an (*,G) entry, we only check that the incomming
2094 * interface is part of the static tree.
2095 */
2096 cache_proxy = ip6mr_cache_find_any_parent(mrt, vif);
2097 if (cache_proxy &&
2098 cache_proxy->mfc_un.res.ttls[true_vifi] < 255)
2099 goto forward;
2100 }
2101
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002102 /*
2103 * Wrong interface: drop packet and (maybe) send PIM assert.
2104 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02002105 if (mrt->vif6_table[vif].dev != skb->dev) {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002106 cache->mfc_un.res.wrong_if++;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002107
Patrick McHardy6bd52142010-05-11 14:40:53 +02002108 if (true_vifi >= 0 && mrt->mroute_do_assert &&
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002109 /* pimsm uses asserts, when switching from RPT to SPT,
2110 so that we cannot check that packet arrived on an oif.
2111 It is bad, but otherwise we would need to move pretty
2112 large chunk of pimd to kernel. Ough... --ANK
2113 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02002114 (mrt->mroute_do_pim ||
Benjamin Therya21f3f92008-12-10 16:28:44 -08002115 cache->mfc_un.res.ttls[true_vifi] < 255) &&
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002116 time_after(jiffies,
2117 cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) {
2118 cache->mfc_un.res.last_assert = jiffies;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002119 ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002120 }
2121 goto dont_forward;
2122 }
2123
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002124forward:
Patrick McHardy6bd52142010-05-11 14:40:53 +02002125 mrt->vif6_table[vif].pkt_in++;
2126 mrt->vif6_table[vif].bytes_in += skb->len;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002127
2128 /*
2129 * Forward the frame
2130 */
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002131 if (ipv6_addr_any(&cache->mf6c_origin) &&
2132 ipv6_addr_any(&cache->mf6c_mcastgrp)) {
2133 if (true_vifi >= 0 &&
2134 true_vifi != cache->mf6c_parent &&
2135 ipv6_hdr(skb)->hop_limit >
2136 cache->mfc_un.res.ttls[cache->mf6c_parent]) {
2137 /* It's an (*,*) entry and the packet is not coming from
2138 * the upstream: forward the packet to the upstream
2139 * only.
2140 */
2141 psend = cache->mf6c_parent;
2142 goto last_forward;
2143 }
2144 goto dont_forward;
2145 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002146 for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) {
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002147 /* For (*,G) entry, don't forward to the incoming interface */
2148 if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) &&
2149 ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002150 if (psend != -1) {
2151 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
2152 if (skb2)
Patrick McHardy6bd52142010-05-11 14:40:53 +02002153 ip6mr_forward2(net, mrt, skb2, cache, psend);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002154 }
2155 psend = ct;
2156 }
2157 }
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002158last_forward:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002159 if (psend != -1) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002160 ip6mr_forward2(net, mrt, skb, cache, psend);
Rami Rosen2b52c3a2013-07-21 03:00:31 +03002161 return;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002162 }
2163
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002164dont_forward:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002165 kfree_skb(skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002166}
2167
2168
2169/*
2170 * Multicast packets for forwarding arrive here
2171 */
2172
2173int ip6_mr_input(struct sk_buff *skb)
2174{
2175 struct mfc6_cache *cache;
Benjamin Thery8229efd2008-12-10 16:30:15 -08002176 struct net *net = dev_net(skb->dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +02002177 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -05002178 struct flowi6 fl6 = {
2179 .flowi6_iif = skb->dev->ifindex,
2180 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +02002181 };
2182 int err;
2183
David S. Miller4c9483b2011-03-12 16:22:43 -05002184 err = ip6mr_fib_lookup(net, &fl6, &mrt);
Ben Greear2015de52011-09-27 15:16:08 -04002185 if (err < 0) {
2186 kfree_skb(skb);
Patrick McHardyd1db2752010-05-11 14:40:55 +02002187 return err;
Ben Greear2015de52011-09-27 15:16:08 -04002188 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002189
2190 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02002191 cache = ip6mr_cache_find(mrt,
Benjamin Thery8229efd2008-12-10 16:30:15 -08002192 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr);
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002193 if (cache == NULL) {
2194 int vif = ip6mr_find_vif(mrt, skb->dev);
2195
2196 if (vif >= 0)
2197 cache = ip6mr_cache_find_any(mrt,
2198 &ipv6_hdr(skb)->daddr,
2199 vif);
2200 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002201
2202 /*
2203 * No usable cache entry
2204 */
2205 if (cache == NULL) {
2206 int vif;
2207
Patrick McHardy6bd52142010-05-11 14:40:53 +02002208 vif = ip6mr_find_vif(mrt, skb->dev);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002209 if (vif >= 0) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002210 int err = ip6mr_cache_unresolved(mrt, vif, skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002211 read_unlock(&mrt_lock);
2212
2213 return err;
2214 }
2215 read_unlock(&mrt_lock);
2216 kfree_skb(skb);
2217 return -ENODEV;
2218 }
2219
Patrick McHardy6bd52142010-05-11 14:40:53 +02002220 ip6_mr_forward(net, mrt, skb, cache);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002221
2222 read_unlock(&mrt_lock);
2223
2224 return 0;
2225}
2226
2227
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002228static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
2229 struct mfc6_cache *c, struct rtmsg *rtm)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002230{
2231 int ct;
2232 struct rtnexthop *nhp;
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002233 struct nlattr *mp_attr;
Nicolas Dichteladfa85e2012-12-04 01:13:37 +00002234 struct rta_mfc_stats mfcs;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002235
Nicolas Dichtel74381892010-03-25 23:45:35 +00002236 /* If cache is unresolved, don't try to parse IIF and OIF */
Dan Carpentered0f160a2010-05-26 00:38:56 -07002237 if (c->mf6c_parent >= MAXMIFS)
Nicolas Dichtel74381892010-03-25 23:45:35 +00002238 return -ENOENT;
2239
Thomas Graf74a0bd72012-06-26 23:36:14 +00002240 if (MIF_EXISTS(mrt, c->mf6c_parent) &&
2241 nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0)
2242 return -EMSGSIZE;
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002243 mp_attr = nla_nest_start(skb, RTA_MULTIPATH);
2244 if (mp_attr == NULL)
2245 return -EMSGSIZE;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002246
2247 for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002248 if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) {
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002249 nhp = nla_reserve_nohdr(skb, sizeof(*nhp));
2250 if (nhp == NULL) {
2251 nla_nest_cancel(skb, mp_attr);
2252 return -EMSGSIZE;
2253 }
2254
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002255 nhp->rtnh_flags = 0;
2256 nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
Patrick McHardy6bd52142010-05-11 14:40:53 +02002257 nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002258 nhp->rtnh_len = sizeof(*nhp);
2259 }
2260 }
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002261
2262 nla_nest_end(skb, mp_attr);
2263
Nicolas Dichteladfa85e2012-12-04 01:13:37 +00002264 mfcs.mfcs_packets = c->mfc_un.res.pkt;
2265 mfcs.mfcs_bytes = c->mfc_un.res.bytes;
2266 mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if;
2267 if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0)
2268 return -EMSGSIZE;
2269
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002270 rtm->rtm_type = RTN_MULTICAST;
2271 return 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002272}
2273
Benjamin Thery8229efd2008-12-10 16:30:15 -08002274int ip6mr_get_route(struct net *net,
2275 struct sk_buff *skb, struct rtmsg *rtm, int nowait)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002276{
2277 int err;
Patrick McHardyd1db2752010-05-11 14:40:55 +02002278 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002279 struct mfc6_cache *cache;
Eric Dumazetadf30902009-06-02 05:19:30 +00002280 struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002281
Patrick McHardyd1db2752010-05-11 14:40:55 +02002282 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
2283 if (mrt == NULL)
2284 return -ENOENT;
2285
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002286 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02002287 cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002288 if (!cache && skb->dev) {
2289 int vif = ip6mr_find_vif(mrt, skb->dev);
2290
2291 if (vif >= 0)
2292 cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr,
2293 vif);
2294 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002295
2296 if (!cache) {
2297 struct sk_buff *skb2;
2298 struct ipv6hdr *iph;
2299 struct net_device *dev;
2300 int vif;
2301
2302 if (nowait) {
2303 read_unlock(&mrt_lock);
2304 return -EAGAIN;
2305 }
2306
2307 dev = skb->dev;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002308 if (dev == NULL || (vif = ip6mr_find_vif(mrt, dev)) < 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002309 read_unlock(&mrt_lock);
2310 return -ENODEV;
2311 }
2312
2313 /* really correct? */
2314 skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
2315 if (!skb2) {
2316 read_unlock(&mrt_lock);
2317 return -ENOMEM;
2318 }
2319
2320 skb_reset_transport_header(skb2);
2321
2322 skb_put(skb2, sizeof(struct ipv6hdr));
2323 skb_reset_network_header(skb2);
2324
2325 iph = ipv6_hdr(skb2);
2326 iph->version = 0;
2327 iph->priority = 0;
2328 iph->flow_lbl[0] = 0;
2329 iph->flow_lbl[1] = 0;
2330 iph->flow_lbl[2] = 0;
2331 iph->payload_len = 0;
2332 iph->nexthdr = IPPROTO_NONE;
2333 iph->hop_limit = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00002334 iph->saddr = rt->rt6i_src.addr;
2335 iph->daddr = rt->rt6i_dst.addr;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002336
Patrick McHardy6bd52142010-05-11 14:40:53 +02002337 err = ip6mr_cache_unresolved(mrt, vif, skb2);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002338 read_unlock(&mrt_lock);
2339
2340 return err;
2341 }
2342
2343 if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY))
2344 cache->mfc_flags |= MFC_NOTIFY;
2345
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002346 err = __ip6mr_fill_mroute(mrt, skb, cache, rtm);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002347 read_unlock(&mrt_lock);
2348 return err;
2349}
2350
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002351static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002352 u32 portid, u32 seq, struct mfc6_cache *c, int cmd,
2353 int flags)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002354{
2355 struct nlmsghdr *nlh;
2356 struct rtmsg *rtm;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002357 int err;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002358
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002359 nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags);
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002360 if (nlh == NULL)
2361 return -EMSGSIZE;
2362
2363 rtm = nlmsg_data(nlh);
Nicolas Dichtel193c1e42012-12-04 01:01:49 +00002364 rtm->rtm_family = RTNL_FAMILY_IP6MR;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002365 rtm->rtm_dst_len = 128;
2366 rtm->rtm_src_len = 128;
2367 rtm->rtm_tos = 0;
2368 rtm->rtm_table = mrt->id;
David S. Millerc78679e2012-04-01 20:27:33 -04002369 if (nla_put_u32(skb, RTA_TABLE, mrt->id))
2370 goto nla_put_failure;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002371 rtm->rtm_type = RTN_MULTICAST;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002372 rtm->rtm_scope = RT_SCOPE_UNIVERSE;
Nicolas Dichtel9a68ac72012-12-04 01:13:38 +00002373 if (c->mfc_flags & MFC_STATIC)
2374 rtm->rtm_protocol = RTPROT_STATIC;
2375 else
2376 rtm->rtm_protocol = RTPROT_MROUTED;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002377 rtm->rtm_flags = 0;
2378
David S. Millerc78679e2012-04-01 20:27:33 -04002379 if (nla_put(skb, RTA_SRC, 16, &c->mf6c_origin) ||
2380 nla_put(skb, RTA_DST, 16, &c->mf6c_mcastgrp))
2381 goto nla_put_failure;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002382 err = __ip6mr_fill_mroute(mrt, skb, c, rtm);
2383 /* do not break the dump if cache is unresolved */
2384 if (err < 0 && err != -ENOENT)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002385 goto nla_put_failure;
2386
2387 return nlmsg_end(skb, nlh);
2388
2389nla_put_failure:
2390 nlmsg_cancel(skb, nlh);
2391 return -EMSGSIZE;
2392}
2393
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00002394static int mr6_msgsize(bool unresolved, int maxvif)
2395{
2396 size_t len =
2397 NLMSG_ALIGN(sizeof(struct rtmsg))
2398 + nla_total_size(4) /* RTA_TABLE */
2399 + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */
2400 + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */
2401 ;
2402
2403 if (!unresolved)
2404 len = len
2405 + nla_total_size(4) /* RTA_IIF */
2406 + nla_total_size(0) /* RTA_MULTIPATH */
2407 + maxvif * NLA_ALIGN(sizeof(struct rtnexthop))
2408 /* RTA_MFC_STATS */
2409 + nla_total_size(sizeof(struct rta_mfc_stats))
2410 ;
2411
2412 return len;
2413}
2414
2415static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
2416 int cmd)
2417{
2418 struct net *net = read_pnet(&mrt->net);
2419 struct sk_buff *skb;
2420 int err = -ENOBUFS;
2421
2422 skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif),
2423 GFP_ATOMIC);
2424 if (skb == NULL)
2425 goto errout;
2426
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002427 err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00002428 if (err < 0)
2429 goto errout;
2430
2431 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC);
2432 return;
2433
2434errout:
2435 kfree_skb(skb);
2436 if (err < 0)
2437 rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err);
2438}
2439
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002440static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb)
2441{
2442 struct net *net = sock_net(skb->sk);
2443 struct mr6_table *mrt;
2444 struct mfc6_cache *mfc;
2445 unsigned int t = 0, s_t;
2446 unsigned int h = 0, s_h;
2447 unsigned int e = 0, s_e;
2448
2449 s_t = cb->args[0];
2450 s_h = cb->args[1];
2451 s_e = cb->args[2];
2452
2453 read_lock(&mrt_lock);
2454 ip6mr_for_each_table(mrt, net) {
2455 if (t < s_t)
2456 goto next_table;
2457 if (t > s_t)
2458 s_h = 0;
2459 for (h = s_h; h < MFC6_LINES; h++) {
2460 list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) {
2461 if (e < s_e)
2462 goto next_entry;
2463 if (ip6mr_fill_mroute(mrt, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002464 NETLINK_CB(cb->skb).portid,
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002465 cb->nlh->nlmsg_seq,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002466 mfc, RTM_NEWROUTE,
2467 NLM_F_MULTI) < 0)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002468 goto done;
2469next_entry:
2470 e++;
2471 }
2472 e = s_e = 0;
2473 }
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002474 spin_lock_bh(&mfc_unres_lock);
2475 list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) {
2476 if (e < s_e)
2477 goto next_entry2;
2478 if (ip6mr_fill_mroute(mrt, skb,
2479 NETLINK_CB(cb->skb).portid,
2480 cb->nlh->nlmsg_seq,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002481 mfc, RTM_NEWROUTE,
2482 NLM_F_MULTI) < 0) {
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002483 spin_unlock_bh(&mfc_unres_lock);
2484 goto done;
2485 }
2486next_entry2:
2487 e++;
2488 }
2489 spin_unlock_bh(&mfc_unres_lock);
2490 e = s_e = 0;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002491 s_h = 0;
2492next_table:
2493 t++;
2494 }
2495done:
2496 read_unlock(&mrt_lock);
2497
2498 cb->args[2] = e;
2499 cb->args[1] = h;
2500 cb->args[0] = t;
2501
2502 return skb->len;
2503}