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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;
Eric W. Biederman0c5c9fb2015-03-11 23:06:44 -050059 possible_net_t net;
Patrick McHardyd1db2752010-05-11 14:40:55 +020060 u32 id;
Patrick McHardy6bd52142010-05-11 14:40:53 +020061 struct sock *mroute6_sk;
62 struct timer_list ipmr_expire_timer;
63 struct list_head mfc6_unres_queue;
64 struct list_head mfc6_cache_array[MFC6_LINES];
65 struct mif_device vif6_table[MAXMIFS];
66 int maxvif;
67 atomic_t cache_resolve_queue_len;
Joe Perches53d68412012-11-25 09:35:30 +000068 bool mroute_do_assert;
69 bool mroute_do_pim;
Patrick McHardy6bd52142010-05-11 14:40:53 +020070#ifdef CONFIG_IPV6_PIMSM_V2
71 int mroute_reg_vif_num;
72#endif
73};
74
Patrick McHardyd1db2752010-05-11 14:40:55 +020075struct ip6mr_rule {
76 struct fib_rule common;
77};
78
79struct ip6mr_result {
80 struct mr6_table *mrt;
81};
82
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090083/* Big lock, protecting vif table, mrt cache and mroute socket state.
84 Note that the changes are semaphored via rtnl_lock.
85 */
86
87static DEFINE_RWLOCK(mrt_lock);
88
89/*
90 * Multicast router control variables
91 */
92
Patrick McHardy6bd52142010-05-11 14:40:53 +020093#define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090094
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090095/* Special spinlock for queue of unresolved entries */
96static DEFINE_SPINLOCK(mfc_unres_lock);
97
98/* We return to original Alan's scheme. Hash table of resolved
99 entries is changed only in process context and protected
100 with weak lock mrt_lock. Queue of unresolved entries is protected
101 with strong spinlock mfc_unres_lock.
102
103 In this case data path is free of exclusive locks at all.
104 */
105
106static struct kmem_cache *mrt_cachep __read_mostly;
107
Patrick McHardyd1db2752010-05-11 14:40:55 +0200108static struct mr6_table *ip6mr_new_table(struct net *net, u32 id);
109static void ip6mr_free_table(struct mr6_table *mrt);
110
Rami Rosen2b52c3a2013-07-21 03:00:31 +0300111static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
112 struct sk_buff *skb, struct mfc6_cache *cache);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200113static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
Benjamin Thery8229efd2008-12-10 16:30:15 -0800114 mifi_t mifi, int assert);
Patrick McHardy5b285ca2010-05-11 14:40:56 +0200115static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
116 struct mfc6_cache *c, struct rtmsg *rtm);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +0000117static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
118 int cmd);
Patrick McHardy5b285ca2010-05-11 14:40:56 +0200119static int ip6mr_rtm_dumproute(struct sk_buff *skb,
120 struct netlink_callback *cb);
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +0100121static void mroute_clean_tables(struct mr6_table *mrt, bool all);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200122static void ipmr_expire_process(unsigned long arg);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900123
Patrick McHardyd1db2752010-05-11 14:40:55 +0200124#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
Eric Dumazet8ffb3352010-06-06 15:34:40 -0700125#define ip6mr_for_each_table(mrt, net) \
Patrick McHardyd1db2752010-05-11 14:40:55 +0200126 list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
127
128static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
129{
130 struct mr6_table *mrt;
131
132 ip6mr_for_each_table(mrt, net) {
133 if (mrt->id == id)
134 return mrt;
135 }
136 return NULL;
137}
138
David S. Miller4c9483b2011-03-12 16:22:43 -0500139static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200140 struct mr6_table **mrt)
141{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200142 int err;
Hannes Frederic Sowa95f4a452014-01-13 02:45:22 +0100143 struct ip6mr_result res;
144 struct fib_lookup_arg arg = {
145 .result = &res,
146 .flags = FIB_LOOKUP_NOREF,
147 };
Patrick McHardyd1db2752010-05-11 14:40:55 +0200148
David S. Miller4c9483b2011-03-12 16:22:43 -0500149 err = fib_rules_lookup(net->ipv6.mr6_rules_ops,
150 flowi6_to_flowi(flp6), 0, &arg);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200151 if (err < 0)
152 return err;
153 *mrt = res.mrt;
154 return 0;
155}
156
157static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
158 int flags, struct fib_lookup_arg *arg)
159{
160 struct ip6mr_result *res = arg->result;
161 struct mr6_table *mrt;
162
163 switch (rule->action) {
164 case FR_ACT_TO_TBL:
165 break;
166 case FR_ACT_UNREACHABLE:
167 return -ENETUNREACH;
168 case FR_ACT_PROHIBIT:
169 return -EACCES;
170 case FR_ACT_BLACKHOLE:
171 default:
172 return -EINVAL;
173 }
174
175 mrt = ip6mr_get_table(rule->fr_net, rule->table);
Ian Morris63159f22015-03-29 14:00:04 +0100176 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200177 return -EAGAIN;
178 res->mrt = mrt;
179 return 0;
180}
181
182static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags)
183{
184 return 1;
185}
186
187static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = {
188 FRA_GENERIC_POLICY,
189};
190
191static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
192 struct fib_rule_hdr *frh, struct nlattr **tb)
193{
194 return 0;
195}
196
197static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
198 struct nlattr **tb)
199{
200 return 1;
201}
202
203static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
204 struct fib_rule_hdr *frh)
205{
206 frh->dst_len = 0;
207 frh->src_len = 0;
208 frh->tos = 0;
209 return 0;
210}
211
Andi Kleen04a6f822012-10-04 17:12:11 -0700212static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = {
Patrick McHardyd1db2752010-05-11 14:40:55 +0200213 .family = RTNL_FAMILY_IP6MR,
214 .rule_size = sizeof(struct ip6mr_rule),
215 .addr_size = sizeof(struct in6_addr),
216 .action = ip6mr_rule_action,
217 .match = ip6mr_rule_match,
218 .configure = ip6mr_rule_configure,
219 .compare = ip6mr_rule_compare,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200220 .fill = ip6mr_rule_fill,
221 .nlgroup = RTNLGRP_IPV6_RULE,
222 .policy = ip6mr_rule_policy,
223 .owner = THIS_MODULE,
224};
225
226static int __net_init ip6mr_rules_init(struct net *net)
227{
228 struct fib_rules_ops *ops;
229 struct mr6_table *mrt;
230 int err;
231
232 ops = fib_rules_register(&ip6mr_rules_ops_template, net);
233 if (IS_ERR(ops))
234 return PTR_ERR(ops);
235
236 INIT_LIST_HEAD(&net->ipv6.mr6_tables);
237
238 mrt = ip6mr_new_table(net, RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +0100239 if (!mrt) {
Patrick McHardyd1db2752010-05-11 14:40:55 +0200240 err = -ENOMEM;
241 goto err1;
242 }
243
244 err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0);
245 if (err < 0)
246 goto err2;
247
248 net->ipv6.mr6_rules_ops = ops;
249 return 0;
250
251err2:
WANG Congf243e5a2015-03-25 14:45:03 -0700252 ip6mr_free_table(mrt);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200253err1:
254 fib_rules_unregister(ops);
255 return err;
256}
257
258static void __net_exit ip6mr_rules_exit(struct net *net)
259{
260 struct mr6_table *mrt, *next;
261
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200262 rtnl_lock();
Eric Dumazet035320d2010-06-06 23:48:40 +0000263 list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
264 list_del(&mrt->list);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200265 ip6mr_free_table(mrt);
Eric Dumazet035320d2010-06-06 23:48:40 +0000266 }
Patrick McHardyd1db2752010-05-11 14:40:55 +0200267 fib_rules_unregister(net->ipv6.mr6_rules_ops);
WANG Cong419df122015-03-31 11:01:46 -0700268 rtnl_unlock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200269}
270#else
271#define ip6mr_for_each_table(mrt, net) \
272 for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
273
274static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
275{
276 return net->ipv6.mrt6;
277}
278
David S. Miller4c9483b2011-03-12 16:22:43 -0500279static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200280 struct mr6_table **mrt)
281{
282 *mrt = net->ipv6.mrt6;
283 return 0;
284}
285
286static int __net_init ip6mr_rules_init(struct net *net)
287{
288 net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT);
289 return net->ipv6.mrt6 ? 0 : -ENOMEM;
290}
291
292static void __net_exit ip6mr_rules_exit(struct net *net)
293{
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200294 rtnl_lock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200295 ip6mr_free_table(net->ipv6.mrt6);
Hannes Frederic Sowa905a6f92013-07-22 23:45:53 +0200296 net->ipv6.mrt6 = NULL;
297 rtnl_unlock();
Patrick McHardyd1db2752010-05-11 14:40:55 +0200298}
299#endif
300
301static struct mr6_table *ip6mr_new_table(struct net *net, u32 id)
302{
303 struct mr6_table *mrt;
304 unsigned int i;
305
306 mrt = ip6mr_get_table(net, id);
Ian Morris53b24b82015-03-29 14:00:05 +0100307 if (mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200308 return mrt;
309
310 mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +0100311 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200312 return NULL;
313 mrt->id = id;
314 write_pnet(&mrt->net, net);
315
316 /* Forwarding cache */
317 for (i = 0; i < MFC6_LINES; i++)
318 INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]);
319
320 INIT_LIST_HEAD(&mrt->mfc6_unres_queue);
321
322 setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process,
323 (unsigned long)mrt);
324
325#ifdef CONFIG_IPV6_PIMSM_V2
326 mrt->mroute_reg_vif_num = -1;
327#endif
328#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
329 list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables);
330#endif
331 return mrt;
332}
333
334static void ip6mr_free_table(struct mr6_table *mrt)
335{
WANG Cong7ba0c472015-03-31 11:01:47 -0700336 del_timer_sync(&mrt->ipmr_expire_timer);
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +0100337 mroute_clean_tables(mrt, true);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200338 kfree(mrt);
339}
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900340
341#ifdef CONFIG_PROC_FS
342
343struct ipmr_mfc_iter {
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800344 struct seq_net_private p;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200345 struct mr6_table *mrt;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200346 struct list_head *cache;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900347 int ct;
348};
349
350
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800351static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
352 struct ipmr_mfc_iter *it, loff_t pos)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900353{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200354 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900355 struct mfc6_cache *mfc;
356
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900357 read_lock(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +0200358 for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200359 it->cache = &mrt->mfc6_cache_array[it->ct];
Patrick McHardyf30a77842010-05-11 14:40:51 +0200360 list_for_each_entry(mfc, it->cache, list)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900361 if (pos-- == 0)
362 return mfc;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200363 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900364 read_unlock(&mrt_lock);
365
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900366 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200367 it->cache = &mrt->mfc6_unres_queue;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200368 list_for_each_entry(mfc, it->cache, list)
Patrick McHardyc476efb2010-05-11 14:40:48 +0200369 if (pos-- == 0)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900370 return mfc;
371 spin_unlock_bh(&mfc_unres_lock);
372
373 it->cache = NULL;
374 return NULL;
375}
376
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900377/*
378 * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
379 */
380
381struct ipmr_vif_iter {
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800382 struct seq_net_private p;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200383 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900384 int ct;
385};
386
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800387static struct mif_device *ip6mr_vif_seq_idx(struct net *net,
388 struct ipmr_vif_iter *iter,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900389 loff_t pos)
390{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200391 struct mr6_table *mrt = iter->mrt;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200392
393 for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) {
394 if (!MIF_EXISTS(mrt, iter->ct))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900395 continue;
396 if (pos-- == 0)
Patrick McHardy6bd52142010-05-11 14:40:53 +0200397 return &mrt->vif6_table[iter->ct];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900398 }
399 return NULL;
400}
401
402static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
403 __acquires(mrt_lock)
404{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200405 struct ipmr_vif_iter *iter = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800406 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200407 struct mr6_table *mrt;
408
409 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +0100410 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200411 return ERR_PTR(-ENOENT);
412
413 iter->mrt = mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800414
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900415 read_lock(&mrt_lock);
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800416 return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1)
417 : SEQ_START_TOKEN;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900418}
419
420static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
421{
422 struct ipmr_vif_iter *iter = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800423 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200424 struct mr6_table *mrt = iter->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900425
426 ++*pos;
427 if (v == SEQ_START_TOKEN)
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800428 return ip6mr_vif_seq_idx(net, iter, 0);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900429
Patrick McHardy6bd52142010-05-11 14:40:53 +0200430 while (++iter->ct < mrt->maxvif) {
431 if (!MIF_EXISTS(mrt, iter->ct))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900432 continue;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200433 return &mrt->vif6_table[iter->ct];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900434 }
435 return NULL;
436}
437
438static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v)
439 __releases(mrt_lock)
440{
441 read_unlock(&mrt_lock);
442}
443
444static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
445{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200446 struct ipmr_vif_iter *iter = seq->private;
447 struct mr6_table *mrt = iter->mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800448
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900449 if (v == SEQ_START_TOKEN) {
450 seq_puts(seq,
451 "Interface BytesIn PktsIn BytesOut PktsOut Flags\n");
452 } else {
453 const struct mif_device *vif = v;
454 const char *name = vif->dev ? vif->dev->name : "none";
455
456 seq_printf(seq,
Al Virod430a222008-06-02 10:59:02 +0100457 "%2td %-10s %8ld %7ld %8ld %7ld %05X\n",
Patrick McHardy6bd52142010-05-11 14:40:53 +0200458 vif - mrt->vif6_table,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900459 name, vif->bytes_in, vif->pkt_in,
460 vif->bytes_out, vif->pkt_out,
461 vif->flags);
462 }
463 return 0;
464}
465
Stephen Hemminger98147d52009-09-01 19:25:02 +0000466static const struct seq_operations ip6mr_vif_seq_ops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900467 .start = ip6mr_vif_seq_start,
468 .next = ip6mr_vif_seq_next,
469 .stop = ip6mr_vif_seq_stop,
470 .show = ip6mr_vif_seq_show,
471};
472
473static int ip6mr_vif_open(struct inode *inode, struct file *file)
474{
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800475 return seq_open_net(inode, file, &ip6mr_vif_seq_ops,
476 sizeof(struct ipmr_vif_iter));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900477}
478
Stephen Hemminger5ca1b992009-09-01 19:25:05 +0000479static const struct file_operations ip6mr_vif_fops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900480 .owner = THIS_MODULE,
481 .open = ip6mr_vif_open,
482 .read = seq_read,
483 .llseek = seq_lseek,
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800484 .release = seq_release_net,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900485};
486
487static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
488{
Patrick McHardyd1db2752010-05-11 14:40:55 +0200489 struct ipmr_mfc_iter *it = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800490 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200491 struct mr6_table *mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800492
Patrick McHardyd1db2752010-05-11 14:40:55 +0200493 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +0100494 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200495 return ERR_PTR(-ENOENT);
496
497 it->mrt = mrt;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800498 return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
499 : SEQ_START_TOKEN;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900500}
501
502static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
503{
504 struct mfc6_cache *mfc = v;
505 struct ipmr_mfc_iter *it = seq->private;
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800506 struct net *net = seq_file_net(seq);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200507 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900508
509 ++*pos;
510
511 if (v == SEQ_START_TOKEN)
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800512 return ipmr_mfc_seq_idx(net, seq->private, 0);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900513
Patrick McHardyf30a77842010-05-11 14:40:51 +0200514 if (mfc->list.next != it->cache)
515 return list_entry(mfc->list.next, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900516
Patrick McHardy6bd52142010-05-11 14:40:53 +0200517 if (it->cache == &mrt->mfc6_unres_queue)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900518 goto end_of_list;
519
Patrick McHardy6bd52142010-05-11 14:40:53 +0200520 BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900521
Benjamin Thery4a6258a2008-12-10 16:24:07 -0800522 while (++it->ct < MFC6_LINES) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200523 it->cache = &mrt->mfc6_cache_array[it->ct];
Patrick McHardyf30a77842010-05-11 14:40:51 +0200524 if (list_empty(it->cache))
525 continue;
526 return list_first_entry(it->cache, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900527 }
528
529 /* exhausted cache_array, show unresolved */
530 read_unlock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200531 it->cache = &mrt->mfc6_unres_queue;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900532 it->ct = 0;
533
534 spin_lock_bh(&mfc_unres_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +0200535 if (!list_empty(it->cache))
536 return list_first_entry(it->cache, struct mfc6_cache, list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900537
538 end_of_list:
539 spin_unlock_bh(&mfc_unres_lock);
540 it->cache = NULL;
541
542 return NULL;
543}
544
545static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
546{
547 struct ipmr_mfc_iter *it = seq->private;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200548 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900549
Patrick McHardy6bd52142010-05-11 14:40:53 +0200550 if (it->cache == &mrt->mfc6_unres_queue)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900551 spin_unlock_bh(&mfc_unres_lock);
Richard Laing25b4a442015-09-03 13:52:31 +1200552 else if (it->cache == &mrt->mfc6_cache_array[it->ct])
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900553 read_unlock(&mrt_lock);
554}
555
556static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
557{
558 int n;
559
560 if (v == SEQ_START_TOKEN) {
561 seq_puts(seq,
562 "Group "
563 "Origin "
564 "Iif Pkts Bytes Wrong Oifs\n");
565 } else {
566 const struct mfc6_cache *mfc = v;
567 const struct ipmr_mfc_iter *it = seq->private;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200568 struct mr6_table *mrt = it->mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900569
Benjamin Thery999890b2008-12-03 22:22:16 -0800570 seq_printf(seq, "%pI6 %pI6 %-3hd",
Harvey Harrison0c6ce782008-10-28 16:09:23 -0700571 &mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800572 mfc->mf6c_parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900573
Patrick McHardy6bd52142010-05-11 14:40:53 +0200574 if (it->cache != &mrt->mfc6_unres_queue) {
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800575 seq_printf(seq, " %8lu %8lu %8lu",
576 mfc->mfc_un.res.pkt,
577 mfc->mfc_un.res.bytes,
578 mfc->mfc_un.res.wrong_if);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900579 for (n = mfc->mfc_un.res.minvif;
580 n < mfc->mfc_un.res.maxvif; n++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200581 if (MIF_EXISTS(mrt, n) &&
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900582 mfc->mfc_un.res.ttls[n] < 255)
583 seq_printf(seq,
584 " %2d:%-3d",
585 n, mfc->mfc_un.res.ttls[n]);
586 }
Benjamin Thery1ea472e2008-12-03 22:21:47 -0800587 } else {
588 /* unresolved mfc_caches don't contain
589 * pkt, bytes and wrong_if values
590 */
591 seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900592 }
593 seq_putc(seq, '\n');
594 }
595 return 0;
596}
597
James Morris88e9d342009-09-22 16:43:43 -0700598static const struct seq_operations ipmr_mfc_seq_ops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900599 .start = ipmr_mfc_seq_start,
600 .next = ipmr_mfc_seq_next,
601 .stop = ipmr_mfc_seq_stop,
602 .show = ipmr_mfc_seq_show,
603};
604
605static int ipmr_mfc_open(struct inode *inode, struct file *file)
606{
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800607 return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
608 sizeof(struct ipmr_mfc_iter));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900609}
610
Stephen Hemminger5ca1b992009-09-01 19:25:05 +0000611static const struct file_operations ip6mr_mfc_fops = {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900612 .owner = THIS_MODULE,
613 .open = ipmr_mfc_open,
614 .read = seq_read,
615 .llseek = seq_lseek,
Benjamin Thery8b90fc72008-12-10 16:29:48 -0800616 .release = seq_release_net,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900617};
618#endif
619
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900620#ifdef CONFIG_IPV6_PIMSM_V2
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900621
622static int pim6_rcv(struct sk_buff *skb)
623{
624 struct pimreghdr *pim;
625 struct ipv6hdr *encap;
626 struct net_device *reg_dev = NULL;
Benjamin Thery8229efd2008-12-10 16:30:15 -0800627 struct net *net = dev_net(skb->dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200628 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -0500629 struct flowi6 fl6 = {
630 .flowi6_iif = skb->dev->ifindex,
631 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200632 };
633 int reg_vif_num;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900634
635 if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
636 goto drop;
637
638 pim = (struct pimreghdr *)skb_transport_header(skb);
639 if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) ||
640 (pim->flags & PIM_NULL_REGISTER) ||
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800641 (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
642 sizeof(*pim), IPPROTO_PIM,
643 csum_partial((void *)pim, sizeof(*pim), 0)) &&
Al Viroec6b4862008-04-26 22:28:58 -0700644 csum_fold(skb_checksum(skb, 0, skb->len, 0))))
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900645 goto drop;
646
647 /* check if the inner packet is destined to mcast group */
648 encap = (struct ipv6hdr *)(skb_transport_header(skb) +
649 sizeof(*pim));
650
651 if (!ipv6_addr_is_multicast(&encap->daddr) ||
652 encap->payload_len == 0 ||
653 ntohs(encap->payload_len) + sizeof(*pim) > skb->len)
654 goto drop;
655
David S. Miller4c9483b2011-03-12 16:22:43 -0500656 if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
Patrick McHardyd1db2752010-05-11 14:40:55 +0200657 goto drop;
658 reg_vif_num = mrt->mroute_reg_vif_num;
659
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900660 read_lock(&mrt_lock);
661 if (reg_vif_num >= 0)
Patrick McHardy6bd52142010-05-11 14:40:53 +0200662 reg_dev = mrt->vif6_table[reg_vif_num].dev;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900663 if (reg_dev)
664 dev_hold(reg_dev);
665 read_unlock(&mrt_lock);
666
Ian Morris63159f22015-03-29 14:00:04 +0100667 if (!reg_dev)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900668 goto drop;
669
670 skb->mac_header = skb->network_header;
671 skb_pull(skb, (u8 *)encap - skb->data);
672 skb_reset_network_header(skb);
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800673 skb->protocol = htons(ETH_P_IPV6);
Cesar Eduardo Barros3e49e6d2011-03-26 05:10:30 +0000674 skb->ip_summed = CHECKSUM_NONE;
Eric Dumazetd19d56d2010-05-17 22:36:55 -0700675
Nicolas Dichtelea231922013-09-02 15:34:58 +0200676 skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
Eric Dumazetd19d56d2010-05-17 22:36:55 -0700677
Eric Dumazetcaf586e2010-09-30 21:06:55 +0000678 netif_rx(skb);
Eric Dumazet8990f462010-09-20 00:12:11 +0000679
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900680 dev_put(reg_dev);
681 return 0;
682 drop:
683 kfree_skb(skb);
684 return 0;
685}
686
Alexey Dobriyan41135cc2009-09-14 12:22:28 +0000687static const struct inet6_protocol pim6_protocol = {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900688 .handler = pim6_rcv,
689};
690
691/* Service routines creating virtual interfaces: PIMREG */
692
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000693static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
694 struct net_device *dev)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900695{
Benjamin Thery8229efd2008-12-10 16:30:15 -0800696 struct net *net = dev_net(dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200697 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -0500698 struct flowi6 fl6 = {
699 .flowi6_oif = dev->ifindex,
Cong Wang6a662712014-04-15 16:25:34 -0700700 .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX,
David S. Miller4c9483b2011-03-12 16:22:43 -0500701 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +0200702 };
703 int err;
704
David S. Miller4c9483b2011-03-12 16:22:43 -0500705 err = ip6mr_fib_lookup(net, &fl6, &mrt);
Ben Greear67928c42011-09-23 13:11:01 +0000706 if (err < 0) {
707 kfree_skb(skb);
Patrick McHardyd1db2752010-05-11 14:40:55 +0200708 return err;
Ben Greear67928c42011-09-23 13:11:01 +0000709 }
Benjamin Thery8229efd2008-12-10 16:30:15 -0800710
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900711 read_lock(&mrt_lock);
Pavel Emelyanovdc58c782008-05-21 14:17:54 -0700712 dev->stats.tx_bytes += skb->len;
713 dev->stats.tx_packets++;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200714 ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900715 read_unlock(&mrt_lock);
716 kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000717 return NETDEV_TX_OK;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900718}
719
Nicolas Dichtelee9b9592015-04-02 17:07:03 +0200720static int reg_vif_get_iflink(const struct net_device *dev)
721{
722 return 0;
723}
724
Stephen Hemminger007c3832008-11-20 20:28:35 -0800725static const struct net_device_ops reg_vif_netdev_ops = {
726 .ndo_start_xmit = reg_vif_xmit,
Nicolas Dichtelee9b9592015-04-02 17:07:03 +0200727 .ndo_get_iflink = reg_vif_get_iflink,
Stephen Hemminger007c3832008-11-20 20:28:35 -0800728};
729
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900730static void reg_vif_setup(struct net_device *dev)
731{
732 dev->type = ARPHRD_PIMREG;
733 dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8;
734 dev->flags = IFF_NOARP;
Stephen Hemminger007c3832008-11-20 20:28:35 -0800735 dev->netdev_ops = &reg_vif_netdev_ops;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900736 dev->destructor = free_netdev;
Tom Goff403dbb92009-06-14 03:16:13 -0700737 dev->features |= NETIF_F_NETNS_LOCAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900738}
739
Patrick McHardyd1db2752010-05-11 14:40:55 +0200740static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900741{
742 struct net_device *dev;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200743 char name[IFNAMSIZ];
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900744
Patrick McHardyd1db2752010-05-11 14:40:55 +0200745 if (mrt->id == RT6_TABLE_DFLT)
746 sprintf(name, "pim6reg");
747 else
748 sprintf(name, "pim6reg%u", mrt->id);
749
Tom Gundersenc835a672014-07-14 16:37:24 +0200750 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup);
Ian Morris63159f22015-03-29 14:00:04 +0100751 if (!dev)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900752 return NULL;
753
Benjamin Thery8229efd2008-12-10 16:30:15 -0800754 dev_net_set(dev, net);
755
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900756 if (register_netdevice(dev)) {
757 free_netdev(dev);
758 return NULL;
759 }
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900760
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900761 if (dev_open(dev))
762 goto failure;
763
Wang Chen7af3db72008-07-14 20:54:54 -0700764 dev_hold(dev);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900765 return dev;
766
767failure:
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900768 unregister_netdevice(dev);
769 return NULL;
770}
771#endif
772
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900773/*
774 * Delete a VIF entry
775 */
776
Patrick McHardy6bd52142010-05-11 14:40:53 +0200777static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900778{
779 struct mif_device *v;
780 struct net_device *dev;
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800781 struct inet6_dev *in6_dev;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200782
783 if (vifi < 0 || vifi >= mrt->maxvif)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900784 return -EADDRNOTAVAIL;
785
Patrick McHardy6bd52142010-05-11 14:40:53 +0200786 v = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900787
788 write_lock_bh(&mrt_lock);
789 dev = v->dev;
790 v->dev = NULL;
791
792 if (!dev) {
793 write_unlock_bh(&mrt_lock);
794 return -EADDRNOTAVAIL;
795 }
796
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900797#ifdef CONFIG_IPV6_PIMSM_V2
Patrick McHardy6bd52142010-05-11 14:40:53 +0200798 if (vifi == mrt->mroute_reg_vif_num)
799 mrt->mroute_reg_vif_num = -1;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900800#endif
801
Patrick McHardy6bd52142010-05-11 14:40:53 +0200802 if (vifi + 1 == mrt->maxvif) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900803 int tmp;
804 for (tmp = vifi - 1; tmp >= 0; tmp--) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200805 if (MIF_EXISTS(mrt, tmp))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900806 break;
807 }
Patrick McHardy6bd52142010-05-11 14:40:53 +0200808 mrt->maxvif = tmp + 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900809 }
810
811 write_unlock_bh(&mrt_lock);
812
813 dev_set_allmulti(dev, -1);
814
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800815 in6_dev = __in6_dev_get(dev);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000816 if (in6_dev) {
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800817 in6_dev->cnf.mc_forwarding--;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000818 inet6_netconf_notify_devconf(dev_net(dev),
819 NETCONFA_MC_FORWARDING,
820 dev->ifindex, &in6_dev->cnf);
821 }
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800822
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900823 if (v->flags & MIFF_REGISTER)
Eric Dumazetc871e662009-10-28 04:48:11 +0000824 unregister_netdevice_queue(dev, head);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900825
826 dev_put(dev);
827 return 0;
828}
829
Benjamin Thery58701ad2008-12-10 16:22:34 -0800830static inline void ip6mr_cache_free(struct mfc6_cache *c)
831{
Benjamin Thery58701ad2008-12-10 16:22:34 -0800832 kmem_cache_free(mrt_cachep, c);
833}
834
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900835/* Destroy an unresolved cache entry, killing queued skbs
836 and reporting error to netlink readers.
837 */
838
Patrick McHardy6bd52142010-05-11 14:40:53 +0200839static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900840{
Patrick McHardy6bd52142010-05-11 14:40:53 +0200841 struct net *net = read_pnet(&mrt->net);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900842 struct sk_buff *skb;
843
Patrick McHardy6bd52142010-05-11 14:40:53 +0200844 atomic_dec(&mrt->cache_resolve_queue_len);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900845
Ian Morris67ba4152014-08-24 21:53:10 +0100846 while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900847 if (ipv6_hdr(skb)->version == 0) {
848 struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
849 nlh->nlmsg_type = NLMSG_ERROR;
Hong zhi guo573ce262013-03-27 06:47:04 +0000850 nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900851 skb_trim(skb, nlh->nlmsg_len);
Hong zhi guo573ce262013-03-27 06:47:04 +0000852 ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000853 rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900854 } else
855 kfree_skb(skb);
856 }
857
Benjamin Thery58701ad2008-12-10 16:22:34 -0800858 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900859}
860
861
Patrick McHardyc476efb2010-05-11 14:40:48 +0200862/* Timer process for all the unresolved queue. */
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900863
Patrick McHardy6bd52142010-05-11 14:40:53 +0200864static void ipmr_do_expire_process(struct mr6_table *mrt)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900865{
866 unsigned long now = jiffies;
867 unsigned long expires = 10 * HZ;
Patrick McHardyf30a77842010-05-11 14:40:51 +0200868 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900869
Patrick McHardy6bd52142010-05-11 14:40:53 +0200870 list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900871 if (time_after(c->mfc_un.unres.expires, now)) {
872 /* not yet... */
873 unsigned long interval = c->mfc_un.unres.expires - now;
874 if (interval < expires)
875 expires = interval;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900876 continue;
877 }
878
Patrick McHardyf30a77842010-05-11 14:40:51 +0200879 list_del(&c->list);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +0000880 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Patrick McHardy6bd52142010-05-11 14:40:53 +0200881 ip6mr_destroy_unres(mrt, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900882 }
883
Patrick McHardy6bd52142010-05-11 14:40:53 +0200884 if (!list_empty(&mrt->mfc6_unres_queue))
885 mod_timer(&mrt->ipmr_expire_timer, jiffies + expires);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900886}
887
Patrick McHardyc476efb2010-05-11 14:40:48 +0200888static void ipmr_expire_process(unsigned long arg)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900889{
Patrick McHardy6bd52142010-05-11 14:40:53 +0200890 struct mr6_table *mrt = (struct mr6_table *)arg;
Patrick McHardyc476efb2010-05-11 14:40:48 +0200891
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900892 if (!spin_trylock(&mfc_unres_lock)) {
Patrick McHardy6bd52142010-05-11 14:40:53 +0200893 mod_timer(&mrt->ipmr_expire_timer, jiffies + 1);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900894 return;
895 }
896
Patrick McHardy6bd52142010-05-11 14:40:53 +0200897 if (!list_empty(&mrt->mfc6_unres_queue))
898 ipmr_do_expire_process(mrt);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900899
900 spin_unlock(&mfc_unres_lock);
901}
902
903/* Fill oifs list. It is called under write locked mrt_lock. */
904
Patrick McHardy6bd52142010-05-11 14:40:53 +0200905static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache,
Patrick McHardyb5aa30b2010-05-11 14:40:50 +0200906 unsigned char *ttls)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900907{
908 int vifi;
909
Rami Rosen6ac7eb02008-04-10 12:40:10 +0300910 cache->mfc_un.res.minvif = MAXMIFS;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900911 cache->mfc_un.res.maxvif = 0;
Rami Rosen6ac7eb02008-04-10 12:40:10 +0300912 memset(cache->mfc_un.res.ttls, 255, MAXMIFS);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900913
Patrick McHardy6bd52142010-05-11 14:40:53 +0200914 for (vifi = 0; vifi < mrt->maxvif; vifi++) {
915 if (MIF_EXISTS(mrt, vifi) &&
Benjamin Thery4e168802008-12-10 16:15:08 -0800916 ttls[vifi] && ttls[vifi] < 255) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900917 cache->mfc_un.res.ttls[vifi] = ttls[vifi];
918 if (cache->mfc_un.res.minvif > vifi)
919 cache->mfc_un.res.minvif = vifi;
920 if (cache->mfc_un.res.maxvif <= vifi)
921 cache->mfc_un.res.maxvif = vifi + 1;
922 }
923 }
924}
925
Patrick McHardy6bd52142010-05-11 14:40:53 +0200926static int mif6_add(struct net *net, struct mr6_table *mrt,
927 struct mif6ctl *vifc, int mrtsock)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900928{
929 int vifi = vifc->mif6c_mifi;
Patrick McHardy6bd52142010-05-11 14:40:53 +0200930 struct mif_device *v = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900931 struct net_device *dev;
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800932 struct inet6_dev *in6_dev;
Wang Chen5ae7b442008-07-14 20:54:23 -0700933 int err;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900934
935 /* Is vif busy ? */
Patrick McHardy6bd52142010-05-11 14:40:53 +0200936 if (MIF_EXISTS(mrt, vifi))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900937 return -EADDRINUSE;
938
939 switch (vifc->mif6c_flags) {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900940#ifdef CONFIG_IPV6_PIMSM_V2
941 case MIFF_REGISTER:
942 /*
943 * Special Purpose VIF in PIM
944 * All the packets will be sent to the daemon
945 */
Patrick McHardy6bd52142010-05-11 14:40:53 +0200946 if (mrt->mroute_reg_vif_num >= 0)
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900947 return -EADDRINUSE;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200948 dev = ip6mr_reg_vif(net, mrt);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900949 if (!dev)
950 return -ENOBUFS;
Wang Chen5ae7b442008-07-14 20:54:23 -0700951 err = dev_set_allmulti(dev, 1);
952 if (err) {
953 unregister_netdevice(dev);
Wang Chen7af3db72008-07-14 20:54:54 -0700954 dev_put(dev);
Wang Chen5ae7b442008-07-14 20:54:23 -0700955 return err;
956 }
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +0900957 break;
958#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900959 case 0:
Benjamin Thery8229efd2008-12-10 16:30:15 -0800960 dev = dev_get_by_index(net, vifc->mif6c_pifi);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900961 if (!dev)
962 return -EADDRNOTAVAIL;
Wang Chen5ae7b442008-07-14 20:54:23 -0700963 err = dev_set_allmulti(dev, 1);
Wang Chen7af3db72008-07-14 20:54:54 -0700964 if (err) {
965 dev_put(dev);
Wang Chen5ae7b442008-07-14 20:54:23 -0700966 return err;
Wang Chen7af3db72008-07-14 20:54:54 -0700967 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900968 break;
969 default:
970 return -EINVAL;
971 }
972
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800973 in6_dev = __in6_dev_get(dev);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000974 if (in6_dev) {
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800975 in6_dev->cnf.mc_forwarding++;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000976 inet6_netconf_notify_devconf(dev_net(dev),
977 NETCONFA_MC_FORWARDING,
978 dev->ifindex, &in6_dev->cnf);
979 }
Thomas Goff1d6e55f2009-01-27 22:39:59 -0800980
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900981 /*
982 * Fill in the VIF structures
983 */
984 v->rate_limit = vifc->vifc_rate_limit;
985 v->flags = vifc->mif6c_flags;
986 if (!mrtsock)
987 v->flags |= VIFF_STATIC;
988 v->threshold = vifc->vifc_threshold;
989 v->bytes_in = 0;
990 v->bytes_out = 0;
991 v->pkt_in = 0;
992 v->pkt_out = 0;
993 v->link = dev->ifindex;
994 if (v->flags & MIFF_REGISTER)
Nicolas Dichtela54acb32015-04-02 17:07:00 +0200995 v->link = dev_get_iflink(dev);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900996
997 /* And finish update writing critical data */
998 write_lock_bh(&mrt_lock);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900999 v->dev = dev;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001000#ifdef CONFIG_IPV6_PIMSM_V2
1001 if (v->flags & MIFF_REGISTER)
Patrick McHardy6bd52142010-05-11 14:40:53 +02001002 mrt->mroute_reg_vif_num = vifi;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001003#endif
Patrick McHardy6bd52142010-05-11 14:40:53 +02001004 if (vifi + 1 > mrt->maxvif)
1005 mrt->maxvif = vifi + 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001006 write_unlock_bh(&mrt_lock);
1007 return 0;
1008}
1009
Patrick McHardy6bd52142010-05-11 14:40:53 +02001010static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001011 const struct in6_addr *origin,
1012 const struct in6_addr *mcastgrp)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001013{
1014 int line = MFC6_HASH(mcastgrp, origin);
1015 struct mfc6_cache *c;
1016
Patrick McHardy6bd52142010-05-11 14:40:53 +02001017 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001018 if (ipv6_addr_equal(&c->mf6c_origin, origin) &&
1019 ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp))
Patrick McHardyf30a77842010-05-11 14:40:51 +02001020 return c;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001021 }
Patrick McHardyf30a77842010-05-11 14:40:51 +02001022 return NULL;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001023}
1024
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001025/* Look for a (*,*,oif) entry */
1026static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt,
1027 mifi_t mifi)
1028{
1029 int line = MFC6_HASH(&in6addr_any, &in6addr_any);
1030 struct mfc6_cache *c;
1031
1032 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
1033 if (ipv6_addr_any(&c->mf6c_origin) &&
1034 ipv6_addr_any(&c->mf6c_mcastgrp) &&
1035 (c->mfc_un.res.ttls[mifi] < 255))
1036 return c;
1037
1038 return NULL;
1039}
1040
1041/* Look for a (*,G) entry */
1042static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt,
1043 struct in6_addr *mcastgrp,
1044 mifi_t mifi)
1045{
1046 int line = MFC6_HASH(mcastgrp, &in6addr_any);
1047 struct mfc6_cache *c, *proxy;
1048
1049 if (ipv6_addr_any(mcastgrp))
1050 goto skip;
1051
1052 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
1053 if (ipv6_addr_any(&c->mf6c_origin) &&
1054 ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) {
1055 if (c->mfc_un.res.ttls[mifi] < 255)
1056 return c;
1057
1058 /* It's ok if the mifi is part of the static tree */
1059 proxy = ip6mr_cache_find_any_parent(mrt,
1060 c->mf6c_parent);
1061 if (proxy && proxy->mfc_un.res.ttls[mifi] < 255)
1062 return c;
1063 }
1064
1065skip:
1066 return ip6mr_cache_find_any_parent(mrt, mifi);
1067}
1068
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001069/*
1070 * Allocate a multicast cache entry
1071 */
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001072static struct mfc6_cache *ip6mr_cache_alloc(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001073{
Joe Perches36cbac52008-12-03 22:27:25 -08001074 struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01001075 if (!c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001076 return NULL;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001077 c->mfc_un.res.minvif = MAXMIFS;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001078 return c;
1079}
1080
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001081static struct mfc6_cache *ip6mr_cache_alloc_unres(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001082{
Joe Perches36cbac52008-12-03 22:27:25 -08001083 struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01001084 if (!c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001085 return NULL;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001086 skb_queue_head_init(&c->mfc_un.unres.unresolved);
1087 c->mfc_un.unres.expires = jiffies + 10 * HZ;
1088 return c;
1089}
1090
1091/*
1092 * A cache entry has gone into a resolved state from queued
1093 */
1094
Patrick McHardy6bd52142010-05-11 14:40:53 +02001095static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt,
1096 struct mfc6_cache *uc, struct mfc6_cache *c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001097{
1098 struct sk_buff *skb;
1099
1100 /*
1101 * Play the pending entries through our router
1102 */
1103
Ian Morris67ba4152014-08-24 21:53:10 +01001104 while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001105 if (ipv6_hdr(skb)->version == 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001106 struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
1107
Hong zhi guo573ce262013-03-27 06:47:04 +00001108 if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) {
YOSHIFUJI Hideaki549e0282008-04-05 22:17:39 +09001109 nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001110 } else {
1111 nlh->nlmsg_type = NLMSG_ERROR;
Hong zhi guo573ce262013-03-27 06:47:04 +00001112 nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001113 skb_trim(skb, nlh->nlmsg_len);
Hong zhi guo573ce262013-03-27 06:47:04 +00001114 ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001115 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00001116 rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001117 } else
Patrick McHardy6bd52142010-05-11 14:40:53 +02001118 ip6_mr_forward(net, mrt, skb, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001119 }
1120}
1121
1122/*
1123 * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd
1124 * expects the following bizarre scheme.
1125 *
1126 * Called under mrt_lock.
1127 */
1128
Patrick McHardy6bd52142010-05-11 14:40:53 +02001129static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
1130 mifi_t mifi, int assert)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001131{
1132 struct sk_buff *skb;
1133 struct mrt6msg *msg;
1134 int ret;
1135
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001136#ifdef CONFIG_IPV6_PIMSM_V2
1137 if (assert == MRT6MSG_WHOLEPKT)
1138 skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt)
1139 +sizeof(*msg));
1140 else
1141#endif
1142 skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001143
1144 if (!skb)
1145 return -ENOBUFS;
1146
1147 /* I suppose that internal messages
1148 * do not require checksums */
1149
1150 skb->ip_summed = CHECKSUM_UNNECESSARY;
1151
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001152#ifdef CONFIG_IPV6_PIMSM_V2
1153 if (assert == MRT6MSG_WHOLEPKT) {
1154 /* Ugly, but we have no choice with this interface.
1155 Duplicate old header, fix length etc.
1156 And all this only to mangle msg->im6_msgtype and
1157 to set msg->im6_mbz to "mbz" :-)
1158 */
1159 skb_push(skb, -skb_network_offset(pkt));
1160
1161 skb_push(skb, sizeof(*msg));
1162 skb_reset_transport_header(skb);
1163 msg = (struct mrt6msg *)skb_transport_header(skb);
1164 msg->im6_mbz = 0;
1165 msg->im6_msgtype = MRT6MSG_WHOLEPKT;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001166 msg->im6_mif = mrt->mroute_reg_vif_num;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001167 msg->im6_pad = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001168 msg->im6_src = ipv6_hdr(pkt)->saddr;
1169 msg->im6_dst = ipv6_hdr(pkt)->daddr;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001170
1171 skb->ip_summed = CHECKSUM_UNNECESSARY;
1172 } else
1173#endif
1174 {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001175 /*
1176 * Copy the IP header
1177 */
1178
1179 skb_put(skb, sizeof(struct ipv6hdr));
1180 skb_reset_network_header(skb);
1181 skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr));
1182
1183 /*
1184 * Add our header
1185 */
1186 skb_put(skb, sizeof(*msg));
1187 skb_reset_transport_header(skb);
1188 msg = (struct mrt6msg *)skb_transport_header(skb);
1189
1190 msg->im6_mbz = 0;
1191 msg->im6_msgtype = assert;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001192 msg->im6_mif = mifi;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001193 msg->im6_pad = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001194 msg->im6_src = ipv6_hdr(pkt)->saddr;
1195 msg->im6_dst = ipv6_hdr(pkt)->daddr;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001196
Eric Dumazetadf30902009-06-02 05:19:30 +00001197 skb_dst_set(skb, dst_clone(skb_dst(pkt)));
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001198 skb->ip_summed = CHECKSUM_UNNECESSARY;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001199 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001200
Ian Morris63159f22015-03-29 14:00:04 +01001201 if (!mrt->mroute6_sk) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001202 kfree_skb(skb);
1203 return -EINVAL;
1204 }
1205
1206 /*
1207 * Deliver to user space multicast routing algorithms
1208 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001209 ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb);
Benjamin Therybd91b8b2008-12-10 16:07:08 -08001210 if (ret < 0) {
Joe Perchese87cc472012-05-13 21:56:26 +00001211 net_warn_ratelimited("mroute6: pending queue full, dropping entries\n");
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001212 kfree_skb(skb);
1213 }
1214
1215 return ret;
1216}
1217
1218/*
1219 * Queue a packet for resolution. It gets locked cache entry!
1220 */
1221
1222static int
Patrick McHardy6bd52142010-05-11 14:40:53 +02001223ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001224{
Patrick McHardyf30a77842010-05-11 14:40:51 +02001225 bool found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001226 int err;
1227 struct mfc6_cache *c;
1228
1229 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001230 list_for_each_entry(c, &mrt->mfc6_unres_queue, list) {
Patrick McHardyc476efb2010-05-11 14:40:48 +02001231 if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) &&
Patrick McHardyf30a77842010-05-11 14:40:51 +02001232 ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) {
1233 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001234 break;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001235 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001236 }
1237
Patrick McHardyf30a77842010-05-11 14:40:51 +02001238 if (!found) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001239 /*
1240 * Create a new entry if allowable
1241 */
1242
Patrick McHardy6bd52142010-05-11 14:40:53 +02001243 if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001244 (c = ip6mr_cache_alloc_unres()) == NULL) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001245 spin_unlock_bh(&mfc_unres_lock);
1246
1247 kfree_skb(skb);
1248 return -ENOBUFS;
1249 }
1250
1251 /*
1252 * Fill in the new cache entry
1253 */
1254 c->mf6c_parent = -1;
1255 c->mf6c_origin = ipv6_hdr(skb)->saddr;
1256 c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr;
1257
1258 /*
1259 * Reflect first query at pim6sd
1260 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001261 err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE);
Benjamin Thery8229efd2008-12-10 16:30:15 -08001262 if (err < 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001263 /* If the report failed throw the cache entry
1264 out - Brad Parker
1265 */
1266 spin_unlock_bh(&mfc_unres_lock);
1267
Benjamin Thery58701ad2008-12-10 16:22:34 -08001268 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001269 kfree_skb(skb);
1270 return err;
1271 }
1272
Patrick McHardy6bd52142010-05-11 14:40:53 +02001273 atomic_inc(&mrt->cache_resolve_queue_len);
1274 list_add(&c->list, &mrt->mfc6_unres_queue);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001275 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001276
Patrick McHardy6bd52142010-05-11 14:40:53 +02001277 ipmr_do_expire_process(mrt);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001278 }
1279
1280 /*
1281 * See if we can append the packet
1282 */
1283 if (c->mfc_un.unres.unresolved.qlen > 3) {
1284 kfree_skb(skb);
1285 err = -ENOBUFS;
1286 } else {
1287 skb_queue_tail(&c->mfc_un.unres.unresolved, skb);
1288 err = 0;
1289 }
1290
1291 spin_unlock_bh(&mfc_unres_lock);
1292 return err;
1293}
1294
1295/*
1296 * MFC6 cache manipulation by user space
1297 */
1298
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001299static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc,
1300 int parent)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001301{
1302 int line;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001303 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001304
1305 line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
1306
Patrick McHardy6bd52142010-05-11 14:40:53 +02001307 list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001308 if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001309 ipv6_addr_equal(&c->mf6c_mcastgrp,
1310 &mfc->mf6cc_mcastgrp.sin6_addr) &&
1311 (parent == -1 || parent == c->mf6c_parent)) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001312 write_lock_bh(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001313 list_del(&c->list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001314 write_unlock_bh(&mrt_lock);
1315
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001316 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001317 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001318 return 0;
1319 }
1320 }
1321 return -ENOENT;
1322}
1323
1324static int ip6mr_device_event(struct notifier_block *this,
1325 unsigned long event, void *ptr)
1326{
Jiri Pirko351638e2013-05-28 01:30:21 +00001327 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Benjamin Thery8229efd2008-12-10 16:30:15 -08001328 struct net *net = dev_net(dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001329 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001330 struct mif_device *v;
1331 int ct;
Eric Dumazetc871e662009-10-28 04:48:11 +00001332 LIST_HEAD(list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001333
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001334 if (event != NETDEV_UNREGISTER)
1335 return NOTIFY_DONE;
1336
Patrick McHardyd1db2752010-05-11 14:40:55 +02001337 ip6mr_for_each_table(mrt, net) {
1338 v = &mrt->vif6_table[0];
1339 for (ct = 0; ct < mrt->maxvif; ct++, v++) {
1340 if (v->dev == dev)
1341 mif6_delete(mrt, ct, &list);
1342 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001343 }
Eric Dumazetc871e662009-10-28 04:48:11 +00001344 unregister_netdevice_many(&list);
1345
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001346 return NOTIFY_DONE;
1347}
1348
1349static struct notifier_block ip6_mr_notifier = {
1350 .notifier_call = ip6mr_device_event
1351};
1352
1353/*
1354 * Setup for IP multicast routing
1355 */
1356
Benjamin Thery4e168802008-12-10 16:15:08 -08001357static int __net_init ip6mr_net_init(struct net *net)
1358{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001359 int err;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001360
Patrick McHardyd1db2752010-05-11 14:40:55 +02001361 err = ip6mr_rules_init(net);
1362 if (err < 0)
Benjamin Thery4e168802008-12-10 16:15:08 -08001363 goto fail;
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001364
1365#ifdef CONFIG_PROC_FS
1366 err = -ENOMEM;
Gao fengd4beaa62013-02-18 01:34:54 +00001367 if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops))
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001368 goto proc_vif_fail;
Gao fengd4beaa62013-02-18 01:34:54 +00001369 if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops))
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001370 goto proc_cache_fail;
1371#endif
Patrick McHardy6bd52142010-05-11 14:40:53 +02001372
Benjamin Thery4a6258a2008-12-10 16:24:07 -08001373 return 0;
1374
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001375#ifdef CONFIG_PROC_FS
1376proc_cache_fail:
Gao fengece31ff2013-02-18 01:34:56 +00001377 remove_proc_entry("ip6_mr_vif", net->proc_net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001378proc_vif_fail:
Patrick McHardyd1db2752010-05-11 14:40:55 +02001379 ip6mr_rules_exit(net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001380#endif
Benjamin Thery4e168802008-12-10 16:15:08 -08001381fail:
1382 return err;
1383}
1384
1385static void __net_exit ip6mr_net_exit(struct net *net)
1386{
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001387#ifdef CONFIG_PROC_FS
Gao fengece31ff2013-02-18 01:34:56 +00001388 remove_proc_entry("ip6_mr_cache", net->proc_net);
1389 remove_proc_entry("ip6_mr_vif", net->proc_net);
Benjamin Thery8b90fc72008-12-10 16:29:48 -08001390#endif
Patrick McHardyd1db2752010-05-11 14:40:55 +02001391 ip6mr_rules_exit(net);
Benjamin Thery4e168802008-12-10 16:15:08 -08001392}
1393
1394static struct pernet_operations ip6mr_net_ops = {
1395 .init = ip6mr_net_init,
1396 .exit = ip6mr_net_exit,
1397};
1398
Wang Chen623d1a12008-07-03 12:13:30 +08001399int __init ip6_mr_init(void)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001400{
Wang Chen623d1a12008-07-03 12:13:30 +08001401 int err;
1402
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001403 mrt_cachep = kmem_cache_create("ip6_mrt_cache",
1404 sizeof(struct mfc6_cache),
1405 0, SLAB_HWCACHE_ALIGN,
1406 NULL);
1407 if (!mrt_cachep)
Wang Chen623d1a12008-07-03 12:13:30 +08001408 return -ENOMEM;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001409
Benjamin Thery4e168802008-12-10 16:15:08 -08001410 err = register_pernet_subsys(&ip6mr_net_ops);
1411 if (err)
1412 goto reg_pernet_fail;
1413
Wang Chen623d1a12008-07-03 12:13:30 +08001414 err = register_netdevice_notifier(&ip6_mr_notifier);
1415 if (err)
1416 goto reg_notif_fail;
Tom Goff403dbb92009-06-14 03:16:13 -07001417#ifdef CONFIG_IPV6_PIMSM_V2
1418 if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00001419 pr_err("%s: can't add PIM protocol\n", __func__);
Tom Goff403dbb92009-06-14 03:16:13 -07001420 err = -EAGAIN;
1421 goto add_proto_fail;
1422 }
1423#endif
Greg Rosec7ac8672011-06-10 01:27:09 +00001424 rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL,
1425 ip6mr_rtm_dumproute, NULL);
Wang Chen623d1a12008-07-03 12:13:30 +08001426 return 0;
Tom Goff403dbb92009-06-14 03:16:13 -07001427#ifdef CONFIG_IPV6_PIMSM_V2
1428add_proto_fail:
1429 unregister_netdevice_notifier(&ip6_mr_notifier);
1430#endif
Benjamin Thery87b30a62008-11-10 16:34:11 -08001431reg_notif_fail:
Benjamin Thery4e168802008-12-10 16:15:08 -08001432 unregister_pernet_subsys(&ip6mr_net_ops);
1433reg_pernet_fail:
Benjamin Thery87b30a62008-11-10 16:34:11 -08001434 kmem_cache_destroy(mrt_cachep);
Wang Chen623d1a12008-07-03 12:13:30 +08001435 return err;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001436}
1437
Wang Chen623d1a12008-07-03 12:13:30 +08001438void ip6_mr_cleanup(void)
1439{
Duan Jiongffb13882014-11-19 09:35:39 +08001440 rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE);
1441#ifdef CONFIG_IPV6_PIMSM_V2
1442 inet6_del_protocol(&pim6_protocol, IPPROTO_PIM);
1443#endif
Wang Chen623d1a12008-07-03 12:13:30 +08001444 unregister_netdevice_notifier(&ip6_mr_notifier);
Benjamin Thery4e168802008-12-10 16:15:08 -08001445 unregister_pernet_subsys(&ip6mr_net_ops);
Wang Chen623d1a12008-07-03 12:13:30 +08001446 kmem_cache_destroy(mrt_cachep);
1447}
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001448
Patrick McHardy6bd52142010-05-11 14:40:53 +02001449static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt,
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001450 struct mf6cctl *mfc, int mrtsock, int parent)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001451{
Patrick McHardyf30a77842010-05-11 14:40:51 +02001452 bool found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001453 int line;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001454 struct mfc6_cache *uc, *c;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001455 unsigned char ttls[MAXMIFS];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001456 int i;
1457
Patrick McHardya50436f22010-03-17 06:04:14 +00001458 if (mfc->mf6cc_parent >= MAXMIFS)
1459 return -ENFILE;
1460
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001461 memset(ttls, 255, MAXMIFS);
1462 for (i = 0; i < MAXMIFS; i++) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001463 if (IF_ISSET(i, &mfc->mf6cc_ifset))
1464 ttls[i] = 1;
1465
1466 }
1467
1468 line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
1469
Patrick McHardy6bd52142010-05-11 14:40:53 +02001470 list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001471 if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001472 ipv6_addr_equal(&c->mf6c_mcastgrp,
1473 &mfc->mf6cc_mcastgrp.sin6_addr) &&
1474 (parent == -1 || parent == mfc->mf6cc_parent)) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001475 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001476 break;
Patrick McHardyf30a77842010-05-11 14:40:51 +02001477 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001478 }
1479
Patrick McHardyf30a77842010-05-11 14:40:51 +02001480 if (found) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001481 write_lock_bh(&mrt_lock);
1482 c->mf6c_parent = mfc->mf6cc_parent;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001483 ip6mr_update_thresholds(mrt, c, ttls);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001484 if (!mrtsock)
1485 c->mfc_flags |= MFC_STATIC;
1486 write_unlock_bh(&mrt_lock);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001487 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001488 return 0;
1489 }
1490
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001491 if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) &&
1492 !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001493 return -EINVAL;
1494
Patrick McHardyb5aa30b2010-05-11 14:40:50 +02001495 c = ip6mr_cache_alloc();
Ian Morris63159f22015-03-29 14:00:04 +01001496 if (!c)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001497 return -ENOMEM;
1498
1499 c->mf6c_origin = mfc->mf6cc_origin.sin6_addr;
1500 c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr;
1501 c->mf6c_parent = mfc->mf6cc_parent;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001502 ip6mr_update_thresholds(mrt, c, ttls);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001503 if (!mrtsock)
1504 c->mfc_flags |= MFC_STATIC;
1505
1506 write_lock_bh(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001507 list_add(&c->list, &mrt->mfc6_cache_array[line]);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001508 write_unlock_bh(&mrt_lock);
1509
1510 /*
1511 * Check to see if we resolved a queued list. If so we
1512 * need to send on the frames and tidy up.
1513 */
Patrick McHardyf30a77842010-05-11 14:40:51 +02001514 found = false;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001515 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001516 list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) {
Patrick McHardyc476efb2010-05-11 14:40:48 +02001517 if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) &&
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001518 ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001519 list_del(&uc->list);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001520 atomic_dec(&mrt->cache_resolve_queue_len);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001521 found = true;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001522 break;
1523 }
1524 }
Patrick McHardy6bd52142010-05-11 14:40:53 +02001525 if (list_empty(&mrt->mfc6_unres_queue))
1526 del_timer(&mrt->ipmr_expire_timer);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001527 spin_unlock_bh(&mfc_unres_lock);
1528
Patrick McHardyf30a77842010-05-11 14:40:51 +02001529 if (found) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02001530 ip6mr_cache_resolve(net, mrt, uc, c);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001531 ip6mr_cache_free(uc);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001532 }
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001533 mr6_netlink_event(mrt, c, RTM_NEWROUTE);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001534 return 0;
1535}
1536
1537/*
1538 * Close the multicast socket, and clear the vif tables etc
1539 */
1540
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +01001541static void mroute_clean_tables(struct mr6_table *mrt, bool all)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001542{
1543 int i;
Eric Dumazetc871e662009-10-28 04:48:11 +00001544 LIST_HEAD(list);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001545 struct mfc6_cache *c, *next;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001546
1547 /*
1548 * Shut down all active vif entries
1549 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02001550 for (i = 0; i < mrt->maxvif; i++) {
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +01001551 if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC))
1552 continue;
1553 mif6_delete(mrt, i, &list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001554 }
Eric Dumazetc871e662009-10-28 04:48:11 +00001555 unregister_netdevice_many(&list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001556
1557 /*
1558 * Wipe the cache
1559 */
Benjamin Thery4a6258a2008-12-10 16:24:07 -08001560 for (i = 0; i < MFC6_LINES; i++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02001561 list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) {
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +01001562 if (!all && (c->mfc_flags & MFC_STATIC))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001563 continue;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001564 write_lock_bh(&mrt_lock);
Patrick McHardyf30a77842010-05-11 14:40:51 +02001565 list_del(&c->list);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001566 write_unlock_bh(&mrt_lock);
1567
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001568 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Benjamin Thery58701ad2008-12-10 16:22:34 -08001569 ip6mr_cache_free(c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001570 }
1571 }
1572
Patrick McHardy6bd52142010-05-11 14:40:53 +02001573 if (atomic_read(&mrt->cache_resolve_queue_len) != 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001574 spin_lock_bh(&mfc_unres_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001575 list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
Patrick McHardyf30a77842010-05-11 14:40:51 +02001576 list_del(&c->list);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00001577 mr6_netlink_event(mrt, c, RTM_DELROUTE);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001578 ip6mr_destroy_unres(mrt, c);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001579 }
1580 spin_unlock_bh(&mfc_unres_lock);
1581 }
1582}
1583
Patrick McHardy6bd52142010-05-11 14:40:53 +02001584static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001585{
1586 int err = 0;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001587 struct net *net = sock_net(sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001588
1589 rtnl_lock();
1590 write_lock_bh(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001591 if (likely(mrt->mroute6_sk == NULL)) {
1592 mrt->mroute6_sk = sk;
Thomas Goff1d6e55f2009-01-27 22:39:59 -08001593 net->ipv6.devconf_all->mc_forwarding++;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +00001594 inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING,
1595 NETCONFA_IFINDEX_ALL,
1596 net->ipv6.devconf_all);
Thomas Goff1d6e55f2009-01-27 22:39:59 -08001597 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001598 else
1599 err = -EADDRINUSE;
1600 write_unlock_bh(&mrt_lock);
1601
1602 rtnl_unlock();
1603
1604 return err;
1605}
1606
1607int ip6mr_sk_done(struct sock *sk)
1608{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001609 int err = -EACCES;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001610 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001611 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001612
1613 rtnl_lock();
Patrick McHardyd1db2752010-05-11 14:40:55 +02001614 ip6mr_for_each_table(mrt, net) {
1615 if (sk == mrt->mroute6_sk) {
1616 write_lock_bh(&mrt_lock);
1617 mrt->mroute6_sk = NULL;
1618 net->ipv6.devconf_all->mc_forwarding--;
Nicolas Dichteld67b8c62012-12-04 01:13:35 +00001619 inet6_netconf_notify_devconf(net,
1620 NETCONFA_MC_FORWARDING,
1621 NETCONFA_IFINDEX_ALL,
1622 net->ipv6.devconf_all);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001623 write_unlock_bh(&mrt_lock);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001624
Nikolay Aleksandrov4c698042015-11-20 13:54:20 +01001625 mroute_clean_tables(mrt, false);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001626 err = 0;
1627 break;
1628 }
1629 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001630 rtnl_unlock();
1631
1632 return err;
1633}
1634
Patrick McHardyd1db2752010-05-11 14:40:55 +02001635struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
Patrick McHardy6bd52142010-05-11 14:40:53 +02001636{
Patrick McHardyd1db2752010-05-11 14:40:55 +02001637 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -05001638 struct flowi6 fl6 = {
Julian Anastasove374c612014-04-28 10:51:56 +03001639 .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX,
David S. Miller4c9483b2011-03-12 16:22:43 -05001640 .flowi6_oif = skb->dev->ifindex,
1641 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +02001642 };
1643
David S. Miller4c9483b2011-03-12 16:22:43 -05001644 if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
Patrick McHardyd1db2752010-05-11 14:40:55 +02001645 return NULL;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001646
1647 return mrt->mroute6_sk;
1648}
1649
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001650/*
1651 * Socket options and virtual interface manipulation. The whole
1652 * virtual interface system is a complete heap, but unfortunately
1653 * that's how BSD mrouted happens to think. Maybe one day with a proper
1654 * MOSPF/PIM router set up we can clean this up.
1655 */
1656
David S. Millerb7058842009-09-30 16:12:20 -07001657int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001658{
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001659 int ret, parent = 0;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001660 struct mif6ctl vif;
1661 struct mf6cctl mfc;
1662 mifi_t mifi;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001663 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001664 struct mr6_table *mrt;
1665
1666 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +01001667 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +02001668 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001669
1670 if (optname != MRT6_INIT) {
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00001671 if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN))
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001672 return -EACCES;
1673 }
1674
1675 switch (optname) {
1676 case MRT6_INIT:
1677 if (sk->sk_type != SOCK_RAW ||
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001678 inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001679 return -EOPNOTSUPP;
1680 if (optlen < sizeof(int))
1681 return -EINVAL;
1682
Patrick McHardy6bd52142010-05-11 14:40:53 +02001683 return ip6mr_sk_init(mrt, sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001684
1685 case MRT6_DONE:
1686 return ip6mr_sk_done(sk);
1687
1688 case MRT6_ADD_MIF:
1689 if (optlen < sizeof(vif))
1690 return -EINVAL;
1691 if (copy_from_user(&vif, optval, sizeof(vif)))
1692 return -EFAULT;
Rami Rosen6ac7eb02008-04-10 12:40:10 +03001693 if (vif.mif6c_mifi >= MAXMIFS)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001694 return -ENFILE;
1695 rtnl_lock();
Patrick McHardy6bd52142010-05-11 14:40:53 +02001696 ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001697 rtnl_unlock();
1698 return ret;
1699
1700 case MRT6_DEL_MIF:
1701 if (optlen < sizeof(mifi_t))
1702 return -EINVAL;
1703 if (copy_from_user(&mifi, optval, sizeof(mifi_t)))
1704 return -EFAULT;
1705 rtnl_lock();
Patrick McHardy6bd52142010-05-11 14:40:53 +02001706 ret = mif6_delete(mrt, mifi, NULL);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001707 rtnl_unlock();
1708 return ret;
1709
1710 /*
1711 * Manipulate the forwarding caches. These live
1712 * in a sort of kernel/user symbiosis.
1713 */
1714 case MRT6_ADD_MFC:
1715 case MRT6_DEL_MFC:
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001716 parent = -1;
1717 case MRT6_ADD_MFC_PROXY:
1718 case MRT6_DEL_MFC_PROXY:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001719 if (optlen < sizeof(mfc))
1720 return -EINVAL;
1721 if (copy_from_user(&mfc, optval, sizeof(mfc)))
1722 return -EFAULT;
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001723 if (parent == 0)
1724 parent = mfc.mf6cc_parent;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001725 rtnl_lock();
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001726 if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY)
1727 ret = ip6mr_mfc_delete(mrt, &mfc, parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001728 else
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00001729 ret = ip6mr_mfc_add(net, mrt, &mfc,
1730 sk == mrt->mroute6_sk, parent);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001731 rtnl_unlock();
1732 return ret;
1733
1734 /*
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001735 * Control PIM assert (to activate pim will activate assert)
1736 */
1737 case MRT6_ASSERT:
1738 {
1739 int v;
Joe Perches03f52a02012-11-25 18:26:34 +00001740
1741 if (optlen != sizeof(v))
1742 return -EINVAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001743 if (get_user(v, (int __user *)optval))
1744 return -EFAULT;
Joe Perches53d68412012-11-25 09:35:30 +00001745 mrt->mroute_do_assert = v;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001746 return 0;
1747 }
1748
1749#ifdef CONFIG_IPV6_PIMSM_V2
1750 case MRT6_PIM:
1751 {
YOSHIFUJI Hideakia9f83bf2008-04-10 15:41:28 +09001752 int v;
Joe Perches03f52a02012-11-25 18:26:34 +00001753
1754 if (optlen != sizeof(v))
1755 return -EINVAL;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001756 if (get_user(v, (int __user *)optval))
1757 return -EFAULT;
1758 v = !!v;
1759 rtnl_lock();
1760 ret = 0;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001761 if (v != mrt->mroute_do_pim) {
1762 mrt->mroute_do_pim = v;
1763 mrt->mroute_do_assert = v;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001764 }
1765 rtnl_unlock();
1766 return ret;
1767 }
1768
1769#endif
Patrick McHardyd1db2752010-05-11 14:40:55 +02001770#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
1771 case MRT6_TABLE:
1772 {
1773 u32 v;
1774
1775 if (optlen != sizeof(u32))
1776 return -EINVAL;
1777 if (get_user(v, (u32 __user *)optval))
1778 return -EFAULT;
Dan Carpenter75356a82013-01-23 20:38:34 +00001779 /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */
1780 if (v != RT_TABLE_DEFAULT && v >= 100000000)
1781 return -EINVAL;
Patrick McHardyd1db2752010-05-11 14:40:55 +02001782 if (sk == mrt->mroute6_sk)
1783 return -EBUSY;
1784
1785 rtnl_lock();
1786 ret = 0;
1787 if (!ip6mr_new_table(net, v))
1788 ret = -ENOMEM;
1789 raw6_sk(sk)->ip6mr_table = v;
1790 rtnl_unlock();
1791 return ret;
1792 }
1793#endif
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001794 /*
Rami Rosen7d120c52008-04-23 14:35:13 +03001795 * Spurious command, or MRT6_VERSION which you cannot
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001796 * set.
1797 */
1798 default:
1799 return -ENOPROTOOPT;
1800 }
1801}
1802
1803/*
1804 * Getsock opt support for the multicast routing system.
1805 */
1806
1807int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
1808 int __user *optlen)
1809{
1810 int olr;
1811 int val;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001812 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001813 struct mr6_table *mrt;
1814
1815 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +01001816 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +02001817 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001818
1819 switch (optname) {
1820 case MRT6_VERSION:
1821 val = 0x0305;
1822 break;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001823#ifdef CONFIG_IPV6_PIMSM_V2
1824 case MRT6_PIM:
Patrick McHardy6bd52142010-05-11 14:40:53 +02001825 val = mrt->mroute_do_pim;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001826 break;
1827#endif
1828 case MRT6_ASSERT:
Patrick McHardy6bd52142010-05-11 14:40:53 +02001829 val = mrt->mroute_do_assert;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09001830 break;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001831 default:
1832 return -ENOPROTOOPT;
1833 }
1834
1835 if (get_user(olr, optlen))
1836 return -EFAULT;
1837
1838 olr = min_t(int, olr, sizeof(int));
1839 if (olr < 0)
1840 return -EINVAL;
1841
1842 if (put_user(olr, optlen))
1843 return -EFAULT;
1844 if (copy_to_user(optval, &val, olr))
1845 return -EFAULT;
1846 return 0;
1847}
1848
1849/*
1850 * The IP multicast ioctl support routines.
1851 */
1852
1853int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
1854{
1855 struct sioc_sg_req6 sr;
1856 struct sioc_mif_req6 vr;
1857 struct mif_device *vif;
1858 struct mfc6_cache *c;
Benjamin Thery8229efd2008-12-10 16:30:15 -08001859 struct net *net = sock_net(sk);
Patrick McHardyd1db2752010-05-11 14:40:55 +02001860 struct mr6_table *mrt;
1861
1862 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +01001863 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +02001864 return -ENOENT;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001865
1866 switch (cmd) {
1867 case SIOCGETMIFCNT_IN6:
1868 if (copy_from_user(&vr, arg, sizeof(vr)))
1869 return -EFAULT;
Patrick McHardy6bd52142010-05-11 14:40:53 +02001870 if (vr.mifi >= mrt->maxvif)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001871 return -EINVAL;
1872 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001873 vif = &mrt->vif6_table[vr.mifi];
1874 if (MIF_EXISTS(mrt, vr.mifi)) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001875 vr.icount = vif->pkt_in;
1876 vr.ocount = vif->pkt_out;
1877 vr.ibytes = vif->bytes_in;
1878 vr.obytes = vif->bytes_out;
1879 read_unlock(&mrt_lock);
1880
1881 if (copy_to_user(arg, &vr, sizeof(vr)))
1882 return -EFAULT;
1883 return 0;
1884 }
1885 read_unlock(&mrt_lock);
1886 return -EADDRNOTAVAIL;
1887 case SIOCGETSGCNT_IN6:
1888 if (copy_from_user(&sr, arg, sizeof(sr)))
1889 return -EFAULT;
1890
1891 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02001892 c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001893 if (c) {
1894 sr.pktcnt = c->mfc_un.res.pkt;
1895 sr.bytecnt = c->mfc_un.res.bytes;
1896 sr.wrong_if = c->mfc_un.res.wrong_if;
1897 read_unlock(&mrt_lock);
1898
1899 if (copy_to_user(arg, &sr, sizeof(sr)))
1900 return -EFAULT;
1901 return 0;
1902 }
1903 read_unlock(&mrt_lock);
1904 return -EADDRNOTAVAIL;
1905 default:
1906 return -ENOIOCTLCMD;
1907 }
1908}
1909
David S. Millere2d57762011-02-03 17:59:32 -08001910#ifdef CONFIG_COMPAT
1911struct compat_sioc_sg_req6 {
1912 struct sockaddr_in6 src;
1913 struct sockaddr_in6 grp;
1914 compat_ulong_t pktcnt;
1915 compat_ulong_t bytecnt;
1916 compat_ulong_t wrong_if;
1917};
1918
1919struct compat_sioc_mif_req6 {
1920 mifi_t mifi;
1921 compat_ulong_t icount;
1922 compat_ulong_t ocount;
1923 compat_ulong_t ibytes;
1924 compat_ulong_t obytes;
1925};
1926
1927int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
1928{
1929 struct compat_sioc_sg_req6 sr;
1930 struct compat_sioc_mif_req6 vr;
1931 struct mif_device *vif;
1932 struct mfc6_cache *c;
1933 struct net *net = sock_net(sk);
1934 struct mr6_table *mrt;
1935
1936 mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +01001937 if (!mrt)
David S. Millere2d57762011-02-03 17:59:32 -08001938 return -ENOENT;
1939
1940 switch (cmd) {
1941 case SIOCGETMIFCNT_IN6:
1942 if (copy_from_user(&vr, arg, sizeof(vr)))
1943 return -EFAULT;
1944 if (vr.mifi >= mrt->maxvif)
1945 return -EINVAL;
1946 read_lock(&mrt_lock);
1947 vif = &mrt->vif6_table[vr.mifi];
1948 if (MIF_EXISTS(mrt, vr.mifi)) {
1949 vr.icount = vif->pkt_in;
1950 vr.ocount = vif->pkt_out;
1951 vr.ibytes = vif->bytes_in;
1952 vr.obytes = vif->bytes_out;
1953 read_unlock(&mrt_lock);
1954
1955 if (copy_to_user(arg, &vr, sizeof(vr)))
1956 return -EFAULT;
1957 return 0;
1958 }
1959 read_unlock(&mrt_lock);
1960 return -EADDRNOTAVAIL;
1961 case SIOCGETSGCNT_IN6:
1962 if (copy_from_user(&sr, arg, sizeof(sr)))
1963 return -EFAULT;
1964
1965 read_lock(&mrt_lock);
1966 c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
1967 if (c) {
1968 sr.pktcnt = c->mfc_un.res.pkt;
1969 sr.bytecnt = c->mfc_un.res.bytes;
1970 sr.wrong_if = c->mfc_un.res.wrong_if;
1971 read_unlock(&mrt_lock);
1972
1973 if (copy_to_user(arg, &sr, sizeof(sr)))
1974 return -EFAULT;
1975 return 0;
1976 }
1977 read_unlock(&mrt_lock);
1978 return -EADDRNOTAVAIL;
1979 default:
1980 return -ENOIOCTLCMD;
1981 }
1982}
1983#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001984
Eric W. Biederman0c4b51f2015-09-15 20:04:18 -05001985static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001986{
Eric W. Biederman244ba772015-09-15 20:04:04 -05001987 IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
Denis V. Lunev483a47d2008-10-08 11:09:27 -07001988 IPSTATS_MIB_OUTFORWDATAGRAMS);
Eric W. Biederman244ba772015-09-15 20:04:04 -05001989 IP6_ADD_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
Vincent Bernat2d8dbb02012-06-05 03:41:42 +00001990 IPSTATS_MIB_OUTOCTETS, skb->len);
Eric W. Biederman13206b62015-10-07 16:48:35 -05001991 return dst_output(net, sk, skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09001992}
1993
1994/*
1995 * Processing handlers for ip6mr_forward
1996 */
1997
Patrick McHardy6bd52142010-05-11 14:40:53 +02001998static int ip6mr_forward2(struct net *net, struct mr6_table *mrt,
1999 struct sk_buff *skb, struct mfc6_cache *c, int vifi)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002000{
2001 struct ipv6hdr *ipv6h;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002002 struct mif_device *vif = &mrt->vif6_table[vifi];
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002003 struct net_device *dev;
2004 struct dst_entry *dst;
David S. Miller4c9483b2011-03-12 16:22:43 -05002005 struct flowi6 fl6;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002006
Ian Morris63159f22015-03-29 14:00:04 +01002007 if (!vif->dev)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002008 goto out_free;
2009
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002010#ifdef CONFIG_IPV6_PIMSM_V2
2011 if (vif->flags & MIFF_REGISTER) {
2012 vif->pkt_out++;
2013 vif->bytes_out += skb->len;
Pavel Emelyanovdc58c782008-05-21 14:17:54 -07002014 vif->dev->stats.tx_bytes += skb->len;
2015 vif->dev->stats.tx_packets++;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002016 ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT);
Ilpo Järvinen8da73b72008-12-14 23:15:49 -08002017 goto out_free;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002018 }
2019#endif
2020
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002021 ipv6h = ipv6_hdr(skb);
2022
David S. Miller4c9483b2011-03-12 16:22:43 -05002023 fl6 = (struct flowi6) {
2024 .flowi6_oif = vif->link,
2025 .daddr = ipv6h->daddr,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002026 };
2027
David S. Miller4c9483b2011-03-12 16:22:43 -05002028 dst = ip6_route_output(net, NULL, &fl6);
RongQing.Li5095d642012-02-21 22:10:49 +00002029 if (dst->error) {
2030 dst_release(dst);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002031 goto out_free;
RongQing.Li5095d642012-02-21 22:10:49 +00002032 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002033
Eric Dumazetadf30902009-06-02 05:19:30 +00002034 skb_dst_drop(skb);
2035 skb_dst_set(skb, dst);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002036
2037 /*
2038 * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
2039 * not only before forwarding, but after forwarding on all output
2040 * interfaces. It is clear, if mrouter runs a multicasting
2041 * program, it should receive packets not depending to what interface
2042 * program is joined.
2043 * If we will not make it, the program will have to join on all
2044 * interfaces. On the other hand, multihoming host (or router, but
2045 * not mrouter) cannot join to more than one interface - it will
2046 * result in receiving multiple packets.
2047 */
2048 dev = vif->dev;
2049 skb->dev = dev;
2050 vif->pkt_out++;
2051 vif->bytes_out += skb->len;
2052
2053 /* We are about to write */
2054 /* XXX: extension headers? */
2055 if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev)))
2056 goto out_free;
2057
2058 ipv6h = ipv6_hdr(skb);
2059 ipv6h->hop_limit--;
2060
2061 IP6CB(skb)->flags |= IP6SKB_FORWARDED;
2062
Eric W. Biederman29a26a52015-09-15 20:04:16 -05002063 return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD,
2064 net, NULL, skb, skb->dev, dev,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002065 ip6mr_forward2_finish);
2066
2067out_free:
2068 kfree_skb(skb);
2069 return 0;
2070}
2071
Patrick McHardy6bd52142010-05-11 14:40:53 +02002072static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002073{
2074 int ct;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002075
2076 for (ct = mrt->maxvif - 1; ct >= 0; ct--) {
2077 if (mrt->vif6_table[ct].dev == dev)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002078 break;
2079 }
2080 return ct;
2081}
2082
Rami Rosen2b52c3a2013-07-21 03:00:31 +03002083static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
2084 struct sk_buff *skb, struct mfc6_cache *cache)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002085{
2086 int psend = -1;
2087 int vif, ct;
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002088 int true_vifi = ip6mr_find_vif(mrt, skb->dev);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002089
2090 vif = cache->mf6c_parent;
2091 cache->mfc_un.res.pkt++;
2092 cache->mfc_un.res.bytes += skb->len;
2093
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002094 if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) {
2095 struct mfc6_cache *cache_proxy;
2096
Fabian Frederick40dc2ca2014-10-29 10:00:26 +01002097 /* For an (*,G) entry, we only check that the incoming
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002098 * interface is part of the static tree.
2099 */
2100 cache_proxy = ip6mr_cache_find_any_parent(mrt, vif);
2101 if (cache_proxy &&
2102 cache_proxy->mfc_un.res.ttls[true_vifi] < 255)
2103 goto forward;
2104 }
2105
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002106 /*
2107 * Wrong interface: drop packet and (maybe) send PIM assert.
2108 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02002109 if (mrt->vif6_table[vif].dev != skb->dev) {
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002110 cache->mfc_un.res.wrong_if++;
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002111
Patrick McHardy6bd52142010-05-11 14:40:53 +02002112 if (true_vifi >= 0 && mrt->mroute_do_assert &&
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002113 /* pimsm uses asserts, when switching from RPT to SPT,
2114 so that we cannot check that packet arrived on an oif.
2115 It is bad, but otherwise we would need to move pretty
2116 large chunk of pimd to kernel. Ough... --ANK
2117 */
Patrick McHardy6bd52142010-05-11 14:40:53 +02002118 (mrt->mroute_do_pim ||
Benjamin Therya21f3f92008-12-10 16:28:44 -08002119 cache->mfc_un.res.ttls[true_vifi] < 255) &&
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002120 time_after(jiffies,
2121 cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) {
2122 cache->mfc_un.res.last_assert = jiffies;
Patrick McHardy6bd52142010-05-11 14:40:53 +02002123 ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002124 }
2125 goto dont_forward;
2126 }
2127
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002128forward:
Patrick McHardy6bd52142010-05-11 14:40:53 +02002129 mrt->vif6_table[vif].pkt_in++;
2130 mrt->vif6_table[vif].bytes_in += skb->len;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002131
2132 /*
2133 * Forward the frame
2134 */
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002135 if (ipv6_addr_any(&cache->mf6c_origin) &&
2136 ipv6_addr_any(&cache->mf6c_mcastgrp)) {
2137 if (true_vifi >= 0 &&
2138 true_vifi != cache->mf6c_parent &&
2139 ipv6_hdr(skb)->hop_limit >
2140 cache->mfc_un.res.ttls[cache->mf6c_parent]) {
2141 /* It's an (*,*) entry and the packet is not coming from
2142 * the upstream: forward the packet to the upstream
2143 * only.
2144 */
2145 psend = cache->mf6c_parent;
2146 goto last_forward;
2147 }
2148 goto dont_forward;
2149 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002150 for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) {
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002151 /* For (*,G) entry, don't forward to the incoming interface */
2152 if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) &&
2153 ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002154 if (psend != -1) {
2155 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
2156 if (skb2)
Patrick McHardy6bd52142010-05-11 14:40:53 +02002157 ip6mr_forward2(net, mrt, skb2, cache, psend);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002158 }
2159 psend = ct;
2160 }
2161 }
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002162last_forward:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002163 if (psend != -1) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002164 ip6mr_forward2(net, mrt, skb, cache, psend);
Rami Rosen2b52c3a2013-07-21 03:00:31 +03002165 return;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002166 }
2167
YOSHIFUJI Hideaki14fb64e2008-04-03 09:22:54 +09002168dont_forward:
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002169 kfree_skb(skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002170}
2171
2172
2173/*
2174 * Multicast packets for forwarding arrive here
2175 */
2176
2177int ip6_mr_input(struct sk_buff *skb)
2178{
2179 struct mfc6_cache *cache;
Benjamin Thery8229efd2008-12-10 16:30:15 -08002180 struct net *net = dev_net(skb->dev);
Patrick McHardyd1db2752010-05-11 14:40:55 +02002181 struct mr6_table *mrt;
David S. Miller4c9483b2011-03-12 16:22:43 -05002182 struct flowi6 fl6 = {
2183 .flowi6_iif = skb->dev->ifindex,
2184 .flowi6_mark = skb->mark,
Patrick McHardyd1db2752010-05-11 14:40:55 +02002185 };
2186 int err;
2187
David S. Miller4c9483b2011-03-12 16:22:43 -05002188 err = ip6mr_fib_lookup(net, &fl6, &mrt);
Ben Greear2015de52011-09-27 15:16:08 -04002189 if (err < 0) {
2190 kfree_skb(skb);
Patrick McHardyd1db2752010-05-11 14:40:55 +02002191 return err;
Ben Greear2015de52011-09-27 15:16:08 -04002192 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002193
2194 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02002195 cache = ip6mr_cache_find(mrt,
Benjamin Thery8229efd2008-12-10 16:30:15 -08002196 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr);
Ian Morris63159f22015-03-29 14:00:04 +01002197 if (!cache) {
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002198 int vif = ip6mr_find_vif(mrt, skb->dev);
2199
2200 if (vif >= 0)
2201 cache = ip6mr_cache_find_any(mrt,
2202 &ipv6_hdr(skb)->daddr,
2203 vif);
2204 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002205
2206 /*
2207 * No usable cache entry
2208 */
Ian Morris63159f22015-03-29 14:00:04 +01002209 if (!cache) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002210 int vif;
2211
Patrick McHardy6bd52142010-05-11 14:40:53 +02002212 vif = ip6mr_find_vif(mrt, skb->dev);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002213 if (vif >= 0) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002214 int err = ip6mr_cache_unresolved(mrt, vif, skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002215 read_unlock(&mrt_lock);
2216
2217 return err;
2218 }
2219 read_unlock(&mrt_lock);
2220 kfree_skb(skb);
2221 return -ENODEV;
2222 }
2223
Patrick McHardy6bd52142010-05-11 14:40:53 +02002224 ip6_mr_forward(net, mrt, skb, cache);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002225
2226 read_unlock(&mrt_lock);
2227
2228 return 0;
2229}
2230
2231
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002232static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
2233 struct mfc6_cache *c, struct rtmsg *rtm)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002234{
2235 int ct;
2236 struct rtnexthop *nhp;
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002237 struct nlattr *mp_attr;
Nicolas Dichteladfa85e2012-12-04 01:13:37 +00002238 struct rta_mfc_stats mfcs;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002239
Nicolas Dichtel74381892010-03-25 23:45:35 +00002240 /* If cache is unresolved, don't try to parse IIF and OIF */
Dan Carpentered0f160a2010-05-26 00:38:56 -07002241 if (c->mf6c_parent >= MAXMIFS)
Nicolas Dichtel74381892010-03-25 23:45:35 +00002242 return -ENOENT;
2243
Thomas Graf74a0bd72012-06-26 23:36:14 +00002244 if (MIF_EXISTS(mrt, c->mf6c_parent) &&
2245 nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0)
2246 return -EMSGSIZE;
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002247 mp_attr = nla_nest_start(skb, RTA_MULTIPATH);
Ian Morris63159f22015-03-29 14:00:04 +01002248 if (!mp_attr)
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002249 return -EMSGSIZE;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002250
2251 for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
Patrick McHardy6bd52142010-05-11 14:40:53 +02002252 if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) {
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002253 nhp = nla_reserve_nohdr(skb, sizeof(*nhp));
Ian Morris63159f22015-03-29 14:00:04 +01002254 if (!nhp) {
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002255 nla_nest_cancel(skb, mp_attr);
2256 return -EMSGSIZE;
2257 }
2258
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002259 nhp->rtnh_flags = 0;
2260 nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
Patrick McHardy6bd52142010-05-11 14:40:53 +02002261 nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002262 nhp->rtnh_len = sizeof(*nhp);
2263 }
2264 }
Nicolas Dichtel70b386a2012-12-04 01:13:36 +00002265
2266 nla_nest_end(skb, mp_attr);
2267
Nicolas Dichteladfa85e2012-12-04 01:13:37 +00002268 mfcs.mfcs_packets = c->mfc_un.res.pkt;
2269 mfcs.mfcs_bytes = c->mfc_un.res.bytes;
2270 mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if;
2271 if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0)
2272 return -EMSGSIZE;
2273
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002274 rtm->rtm_type = RTN_MULTICAST;
2275 return 1;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002276}
2277
Benjamin Thery8229efd2008-12-10 16:30:15 -08002278int ip6mr_get_route(struct net *net,
2279 struct sk_buff *skb, struct rtmsg *rtm, int nowait)
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002280{
2281 int err;
Patrick McHardyd1db2752010-05-11 14:40:55 +02002282 struct mr6_table *mrt;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002283 struct mfc6_cache *cache;
Eric Dumazetadf30902009-06-02 05:19:30 +00002284 struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002285
Patrick McHardyd1db2752010-05-11 14:40:55 +02002286 mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
Ian Morris63159f22015-03-29 14:00:04 +01002287 if (!mrt)
Patrick McHardyd1db2752010-05-11 14:40:55 +02002288 return -ENOENT;
2289
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002290 read_lock(&mrt_lock);
Patrick McHardy6bd52142010-05-11 14:40:53 +02002291 cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
Nicolas Dichtel660b26d2013-01-21 06:00:26 +00002292 if (!cache && skb->dev) {
2293 int vif = ip6mr_find_vif(mrt, skb->dev);
2294
2295 if (vif >= 0)
2296 cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr,
2297 vif);
2298 }
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002299
2300 if (!cache) {
2301 struct sk_buff *skb2;
2302 struct ipv6hdr *iph;
2303 struct net_device *dev;
2304 int vif;
2305
2306 if (nowait) {
2307 read_unlock(&mrt_lock);
2308 return -EAGAIN;
2309 }
2310
2311 dev = skb->dev;
Ian Morris63159f22015-03-29 14:00:04 +01002312 if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) {
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002313 read_unlock(&mrt_lock);
2314 return -ENODEV;
2315 }
2316
2317 /* really correct? */
2318 skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
2319 if (!skb2) {
2320 read_unlock(&mrt_lock);
2321 return -ENOMEM;
2322 }
2323
2324 skb_reset_transport_header(skb2);
2325
2326 skb_put(skb2, sizeof(struct ipv6hdr));
2327 skb_reset_network_header(skb2);
2328
2329 iph = ipv6_hdr(skb2);
2330 iph->version = 0;
2331 iph->priority = 0;
2332 iph->flow_lbl[0] = 0;
2333 iph->flow_lbl[1] = 0;
2334 iph->flow_lbl[2] = 0;
2335 iph->payload_len = 0;
2336 iph->nexthdr = IPPROTO_NONE;
2337 iph->hop_limit = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00002338 iph->saddr = rt->rt6i_src.addr;
2339 iph->daddr = rt->rt6i_dst.addr;
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002340
Patrick McHardy6bd52142010-05-11 14:40:53 +02002341 err = ip6mr_cache_unresolved(mrt, vif, skb2);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002342 read_unlock(&mrt_lock);
2343
2344 return err;
2345 }
2346
2347 if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY))
2348 cache->mfc_flags |= MFC_NOTIFY;
2349
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002350 err = __ip6mr_fill_mroute(mrt, skb, cache, rtm);
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09002351 read_unlock(&mrt_lock);
2352 return err;
2353}
2354
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002355static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002356 u32 portid, u32 seq, struct mfc6_cache *c, int cmd,
2357 int flags)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002358{
2359 struct nlmsghdr *nlh;
2360 struct rtmsg *rtm;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002361 int err;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002362
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002363 nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags);
Ian Morris63159f22015-03-29 14:00:04 +01002364 if (!nlh)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002365 return -EMSGSIZE;
2366
2367 rtm = nlmsg_data(nlh);
Nicolas Dichtel193c1e42012-12-04 01:01:49 +00002368 rtm->rtm_family = RTNL_FAMILY_IP6MR;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002369 rtm->rtm_dst_len = 128;
2370 rtm->rtm_src_len = 128;
2371 rtm->rtm_tos = 0;
2372 rtm->rtm_table = mrt->id;
David S. Millerc78679e2012-04-01 20:27:33 -04002373 if (nla_put_u32(skb, RTA_TABLE, mrt->id))
2374 goto nla_put_failure;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002375 rtm->rtm_type = RTN_MULTICAST;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002376 rtm->rtm_scope = RT_SCOPE_UNIVERSE;
Nicolas Dichtel9a68ac72012-12-04 01:13:38 +00002377 if (c->mfc_flags & MFC_STATIC)
2378 rtm->rtm_protocol = RTPROT_STATIC;
2379 else
2380 rtm->rtm_protocol = RTPROT_MROUTED;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002381 rtm->rtm_flags = 0;
2382
Jiri Benc930345e2015-03-29 16:59:25 +02002383 if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) ||
2384 nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp))
David S. Millerc78679e2012-04-01 20:27:33 -04002385 goto nla_put_failure;
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002386 err = __ip6mr_fill_mroute(mrt, skb, c, rtm);
2387 /* do not break the dump if cache is unresolved */
2388 if (err < 0 && err != -ENOENT)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002389 goto nla_put_failure;
2390
Johannes Berg053c0952015-01-16 22:09:00 +01002391 nlmsg_end(skb, nlh);
2392 return 0;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002393
2394nla_put_failure:
2395 nlmsg_cancel(skb, nlh);
2396 return -EMSGSIZE;
2397}
2398
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00002399static int mr6_msgsize(bool unresolved, int maxvif)
2400{
2401 size_t len =
2402 NLMSG_ALIGN(sizeof(struct rtmsg))
2403 + nla_total_size(4) /* RTA_TABLE */
2404 + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */
2405 + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */
2406 ;
2407
2408 if (!unresolved)
2409 len = len
2410 + nla_total_size(4) /* RTA_IIF */
2411 + nla_total_size(0) /* RTA_MULTIPATH */
2412 + maxvif * NLA_ALIGN(sizeof(struct rtnexthop))
2413 /* RTA_MFC_STATS */
2414 + nla_total_size(sizeof(struct rta_mfc_stats))
2415 ;
2416
2417 return len;
2418}
2419
2420static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
2421 int cmd)
2422{
2423 struct net *net = read_pnet(&mrt->net);
2424 struct sk_buff *skb;
2425 int err = -ENOBUFS;
2426
2427 skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif),
2428 GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01002429 if (!skb)
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00002430 goto errout;
2431
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002432 err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0);
Nicolas Dichtel812e44d2012-12-04 01:13:41 +00002433 if (err < 0)
2434 goto errout;
2435
2436 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC);
2437 return;
2438
2439errout:
2440 kfree_skb(skb);
2441 if (err < 0)
2442 rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err);
2443}
2444
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002445static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb)
2446{
2447 struct net *net = sock_net(skb->sk);
2448 struct mr6_table *mrt;
2449 struct mfc6_cache *mfc;
2450 unsigned int t = 0, s_t;
2451 unsigned int h = 0, s_h;
2452 unsigned int e = 0, s_e;
2453
2454 s_t = cb->args[0];
2455 s_h = cb->args[1];
2456 s_e = cb->args[2];
2457
2458 read_lock(&mrt_lock);
2459 ip6mr_for_each_table(mrt, net) {
2460 if (t < s_t)
2461 goto next_table;
2462 if (t > s_t)
2463 s_h = 0;
2464 for (h = s_h; h < MFC6_LINES; h++) {
2465 list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) {
2466 if (e < s_e)
2467 goto next_entry;
2468 if (ip6mr_fill_mroute(mrt, skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002469 NETLINK_CB(cb->skb).portid,
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002470 cb->nlh->nlmsg_seq,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002471 mfc, RTM_NEWROUTE,
2472 NLM_F_MULTI) < 0)
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002473 goto done;
2474next_entry:
2475 e++;
2476 }
2477 e = s_e = 0;
2478 }
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002479 spin_lock_bh(&mfc_unres_lock);
2480 list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) {
2481 if (e < s_e)
2482 goto next_entry2;
2483 if (ip6mr_fill_mroute(mrt, skb,
2484 NETLINK_CB(cb->skb).portid,
2485 cb->nlh->nlmsg_seq,
Nicolas Dichtelf5183382014-03-19 17:47:51 +01002486 mfc, RTM_NEWROUTE,
2487 NLM_F_MULTI) < 0) {
Nicolas Dichtel1eb99af2012-12-04 01:13:39 +00002488 spin_unlock_bh(&mfc_unres_lock);
2489 goto done;
2490 }
2491next_entry2:
2492 e++;
2493 }
2494 spin_unlock_bh(&mfc_unres_lock);
2495 e = s_e = 0;
Patrick McHardy5b285ca2010-05-11 14:40:56 +02002496 s_h = 0;
2497next_table:
2498 t++;
2499 }
2500done:
2501 read_unlock(&mrt_lock);
2502
2503 cb->args[2] = e;
2504 cb->args[1] = h;
2505 cb->args[0] = t;
2506
2507 return skb->len;
2508}