]>
Commit | Line | Data |
---|---|---|
7bc570c8 YH |
1 | /* |
2 | * Linux IPv6 multicast routing support for BSD pim6sd | |
3 | * Based on net/ipv4/ipmr.c. | |
4 | * | |
5 | * (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr> | |
6 | * LSIIT Laboratory, Strasbourg, France | |
7 | * (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com> | |
8 | * 6WIND, Paris, France | |
9 | * Copyright (C)2007,2008 USAGI/WIDE Project | |
10 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | */ | |
18 | ||
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
7bc570c8 YH |
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> | |
7bc570c8 YH |
29 | #include <linux/inet.h> |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/inetdevice.h> | |
7bc570c8 YH |
32 | #include <linux/proc_fs.h> |
33 | #include <linux/seq_file.h> | |
7bc570c8 | 34 | #include <linux/init.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
e2d57766 | 36 | #include <linux/compat.h> |
7bc570c8 YH |
37 | #include <net/protocol.h> |
38 | #include <linux/skbuff.h> | |
39 | #include <net/sock.h> | |
7bc570c8 | 40 | #include <net/raw.h> |
7bc570c8 YH |
41 | #include <linux/notifier.h> |
42 | #include <linux/if_arp.h> | |
7bc570c8 YH |
43 | #include <net/checksum.h> |
44 | #include <net/netlink.h> | |
d1db275d | 45 | #include <net/fib_rules.h> |
7bc570c8 YH |
46 | |
47 | #include <net/ipv6.h> | |
48 | #include <net/ip6_route.h> | |
49 | #include <linux/mroute6.h> | |
14fb64e1 | 50 | #include <linux/pim.h> |
7bc570c8 YH |
51 | #include <net/addrconf.h> |
52 | #include <linux/netfilter_ipv6.h> | |
bc3b2d7f | 53 | #include <linux/export.h> |
5d6e430d | 54 | #include <net/ip6_checksum.h> |
d67b8c61 | 55 | #include <linux/netconf.h> |
78afc98e WB |
56 | #include <net/ip_tunnels.h> |
57 | ||
215c81c4 | 58 | #include <linux/nospec.h> |
7bc570c8 | 59 | |
6bd52143 | 60 | struct mr6_table { |
d1db275d | 61 | struct list_head list; |
0c5c9fb5 | 62 | possible_net_t net; |
d1db275d | 63 | u32 id; |
6bd52143 PM |
64 | struct sock *mroute6_sk; |
65 | struct timer_list ipmr_expire_timer; | |
66 | struct list_head mfc6_unres_queue; | |
67 | struct list_head mfc6_cache_array[MFC6_LINES]; | |
68 | struct mif_device vif6_table[MAXMIFS]; | |
69 | int maxvif; | |
70 | atomic_t cache_resolve_queue_len; | |
53d6841d JP |
71 | bool mroute_do_assert; |
72 | bool mroute_do_pim; | |
6bd52143 PM |
73 | #ifdef CONFIG_IPV6_PIMSM_V2 |
74 | int mroute_reg_vif_num; | |
75 | #endif | |
76 | }; | |
77 | ||
d1db275d PM |
78 | struct ip6mr_rule { |
79 | struct fib_rule common; | |
80 | }; | |
81 | ||
82 | struct ip6mr_result { | |
83 | struct mr6_table *mrt; | |
84 | }; | |
85 | ||
7bc570c8 YH |
86 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
87 | Note that the changes are semaphored via rtnl_lock. | |
88 | */ | |
89 | ||
90 | static DEFINE_RWLOCK(mrt_lock); | |
91 | ||
92 | /* | |
93 | * Multicast router control variables | |
94 | */ | |
95 | ||
6bd52143 | 96 | #define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL) |
7bc570c8 | 97 | |
7bc570c8 YH |
98 | /* Special spinlock for queue of unresolved entries */ |
99 | static DEFINE_SPINLOCK(mfc_unres_lock); | |
100 | ||
101 | /* We return to original Alan's scheme. Hash table of resolved | |
102 | entries is changed only in process context and protected | |
103 | with weak lock mrt_lock. Queue of unresolved entries is protected | |
104 | with strong spinlock mfc_unres_lock. | |
105 | ||
106 | In this case data path is free of exclusive locks at all. | |
107 | */ | |
108 | ||
109 | static struct kmem_cache *mrt_cachep __read_mostly; | |
110 | ||
d1db275d PM |
111 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id); |
112 | static void ip6mr_free_table(struct mr6_table *mrt); | |
113 | ||
2b52c3ad RR |
114 | static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
115 | struct sk_buff *skb, struct mfc6_cache *cache); | |
6bd52143 | 116 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
8229efda | 117 | mifi_t mifi, int assert); |
5b285cac PM |
118 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
119 | struct mfc6_cache *c, struct rtmsg *rtm); | |
812e44dd ND |
120 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, |
121 | int cmd); | |
dd12d15c | 122 | static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt); |
5b285cac PM |
123 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, |
124 | struct netlink_callback *cb); | |
4c698046 | 125 | static void mroute_clean_tables(struct mr6_table *mrt, bool all); |
e99e88a9 | 126 | static void ipmr_expire_process(struct timer_list *t); |
d1db275d PM |
127 | |
128 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
8ffb335e | 129 | #define ip6mr_for_each_table(mrt, net) \ |
d1db275d PM |
130 | list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) |
131 | ||
132 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
133 | { | |
134 | struct mr6_table *mrt; | |
135 | ||
136 | ip6mr_for_each_table(mrt, net) { | |
137 | if (mrt->id == id) | |
138 | return mrt; | |
139 | } | |
140 | return NULL; | |
141 | } | |
142 | ||
4c9483b2 | 143 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
144 | struct mr6_table **mrt) |
145 | { | |
d1db275d | 146 | int err; |
95f4a45d HFS |
147 | struct ip6mr_result res; |
148 | struct fib_lookup_arg arg = { | |
149 | .result = &res, | |
150 | .flags = FIB_LOOKUP_NOREF, | |
151 | }; | |
d1db275d | 152 | |
4c9483b2 DM |
153 | err = fib_rules_lookup(net->ipv6.mr6_rules_ops, |
154 | flowi6_to_flowi(flp6), 0, &arg); | |
d1db275d PM |
155 | if (err < 0) |
156 | return err; | |
157 | *mrt = res.mrt; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
162 | int flags, struct fib_lookup_arg *arg) | |
163 | { | |
164 | struct ip6mr_result *res = arg->result; | |
165 | struct mr6_table *mrt; | |
166 | ||
167 | switch (rule->action) { | |
168 | case FR_ACT_TO_TBL: | |
169 | break; | |
170 | case FR_ACT_UNREACHABLE: | |
171 | return -ENETUNREACH; | |
172 | case FR_ACT_PROHIBIT: | |
173 | return -EACCES; | |
174 | case FR_ACT_BLACKHOLE: | |
175 | default: | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
179 | mrt = ip6mr_get_table(rule->fr_net, rule->table); | |
63159f29 | 180 | if (!mrt) |
d1db275d PM |
181 | return -EAGAIN; |
182 | res->mrt = mrt; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) | |
187 | { | |
188 | return 1; | |
189 | } | |
190 | ||
191 | static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { | |
192 | FRA_GENERIC_POLICY, | |
193 | }; | |
194 | ||
195 | static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
196 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
202 | struct nlattr **tb) | |
203 | { | |
204 | return 1; | |
205 | } | |
206 | ||
207 | static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
208 | struct fib_rule_hdr *frh) | |
209 | { | |
210 | frh->dst_len = 0; | |
211 | frh->src_len = 0; | |
212 | frh->tos = 0; | |
213 | return 0; | |
214 | } | |
215 | ||
04a6f82c | 216 | static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { |
d1db275d PM |
217 | .family = RTNL_FAMILY_IP6MR, |
218 | .rule_size = sizeof(struct ip6mr_rule), | |
219 | .addr_size = sizeof(struct in6_addr), | |
220 | .action = ip6mr_rule_action, | |
221 | .match = ip6mr_rule_match, | |
222 | .configure = ip6mr_rule_configure, | |
223 | .compare = ip6mr_rule_compare, | |
d1db275d PM |
224 | .fill = ip6mr_rule_fill, |
225 | .nlgroup = RTNLGRP_IPV6_RULE, | |
226 | .policy = ip6mr_rule_policy, | |
227 | .owner = THIS_MODULE, | |
228 | }; | |
229 | ||
230 | static int __net_init ip6mr_rules_init(struct net *net) | |
231 | { | |
232 | struct fib_rules_ops *ops; | |
233 | struct mr6_table *mrt; | |
234 | int err; | |
235 | ||
236 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); | |
237 | if (IS_ERR(ops)) | |
238 | return PTR_ERR(ops); | |
239 | ||
240 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); | |
241 | ||
242 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
63159f29 | 243 | if (!mrt) { |
d1db275d PM |
244 | err = -ENOMEM; |
245 | goto err1; | |
246 | } | |
247 | ||
248 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); | |
249 | if (err < 0) | |
250 | goto err2; | |
251 | ||
252 | net->ipv6.mr6_rules_ops = ops; | |
253 | return 0; | |
254 | ||
255 | err2: | |
f243e5a7 | 256 | ip6mr_free_table(mrt); |
d1db275d PM |
257 | err1: |
258 | fib_rules_unregister(ops); | |
259 | return err; | |
260 | } | |
261 | ||
262 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
263 | { | |
264 | struct mr6_table *mrt, *next; | |
265 | ||
905a6f96 | 266 | rtnl_lock(); |
035320d5 ED |
267 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
268 | list_del(&mrt->list); | |
d1db275d | 269 | ip6mr_free_table(mrt); |
035320d5 | 270 | } |
d1db275d | 271 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
419df12f | 272 | rtnl_unlock(); |
d1db275d PM |
273 | } |
274 | #else | |
275 | #define ip6mr_for_each_table(mrt, net) \ | |
276 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) | |
277 | ||
278 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
279 | { | |
280 | return net->ipv6.mrt6; | |
281 | } | |
282 | ||
4c9483b2 | 283 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
284 | struct mr6_table **mrt) |
285 | { | |
286 | *mrt = net->ipv6.mrt6; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int __net_init ip6mr_rules_init(struct net *net) | |
291 | { | |
292 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
293 | return net->ipv6.mrt6 ? 0 : -ENOMEM; | |
294 | } | |
295 | ||
296 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
297 | { | |
905a6f96 | 298 | rtnl_lock(); |
d1db275d | 299 | ip6mr_free_table(net->ipv6.mrt6); |
905a6f96 HFS |
300 | net->ipv6.mrt6 = NULL; |
301 | rtnl_unlock(); | |
d1db275d PM |
302 | } |
303 | #endif | |
304 | ||
305 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) | |
306 | { | |
307 | struct mr6_table *mrt; | |
308 | unsigned int i; | |
309 | ||
310 | mrt = ip6mr_get_table(net, id); | |
53b24b8f | 311 | if (mrt) |
d1db275d PM |
312 | return mrt; |
313 | ||
314 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
63159f29 | 315 | if (!mrt) |
d1db275d PM |
316 | return NULL; |
317 | mrt->id = id; | |
318 | write_pnet(&mrt->net, net); | |
319 | ||
320 | /* Forwarding cache */ | |
321 | for (i = 0; i < MFC6_LINES; i++) | |
322 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); | |
323 | ||
324 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); | |
325 | ||
e99e88a9 | 326 | timer_setup(&mrt->ipmr_expire_timer, ipmr_expire_process, 0); |
d1db275d PM |
327 | |
328 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
329 | mrt->mroute_reg_vif_num = -1; | |
330 | #endif | |
331 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
332 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); | |
333 | #endif | |
334 | return mrt; | |
335 | } | |
7bc570c8 | 336 | |
d1db275d PM |
337 | static void ip6mr_free_table(struct mr6_table *mrt) |
338 | { | |
7ba0c47c | 339 | del_timer_sync(&mrt->ipmr_expire_timer); |
4c698046 | 340 | mroute_clean_tables(mrt, true); |
d1db275d PM |
341 | kfree(mrt); |
342 | } | |
7bc570c8 YH |
343 | |
344 | #ifdef CONFIG_PROC_FS | |
345 | ||
346 | struct ipmr_mfc_iter { | |
8b90fc7e | 347 | struct seq_net_private p; |
d1db275d | 348 | struct mr6_table *mrt; |
f30a7784 | 349 | struct list_head *cache; |
7bc570c8 YH |
350 | int ct; |
351 | }; | |
352 | ||
353 | ||
8b90fc7e BT |
354 | static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, |
355 | struct ipmr_mfc_iter *it, loff_t pos) | |
7bc570c8 | 356 | { |
d1db275d | 357 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
358 | struct mfc6_cache *mfc; |
359 | ||
7bc570c8 | 360 | read_lock(&mrt_lock); |
f30a7784 | 361 | for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { |
6bd52143 | 362 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 | 363 | list_for_each_entry(mfc, it->cache, list) |
7bc570c8 YH |
364 | if (pos-- == 0) |
365 | return mfc; | |
f30a7784 | 366 | } |
7bc570c8 YH |
367 | read_unlock(&mrt_lock); |
368 | ||
7bc570c8 | 369 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 370 | it->cache = &mrt->mfc6_unres_queue; |
f30a7784 | 371 | list_for_each_entry(mfc, it->cache, list) |
c476efbc | 372 | if (pos-- == 0) |
7bc570c8 YH |
373 | return mfc; |
374 | spin_unlock_bh(&mfc_unres_lock); | |
375 | ||
376 | it->cache = NULL; | |
377 | return NULL; | |
378 | } | |
379 | ||
7bc570c8 YH |
380 | /* |
381 | * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif | |
382 | */ | |
383 | ||
384 | struct ipmr_vif_iter { | |
8b90fc7e | 385 | struct seq_net_private p; |
d1db275d | 386 | struct mr6_table *mrt; |
7bc570c8 YH |
387 | int ct; |
388 | }; | |
389 | ||
8b90fc7e BT |
390 | static struct mif_device *ip6mr_vif_seq_idx(struct net *net, |
391 | struct ipmr_vif_iter *iter, | |
7bc570c8 YH |
392 | loff_t pos) |
393 | { | |
d1db275d | 394 | struct mr6_table *mrt = iter->mrt; |
6bd52143 PM |
395 | |
396 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
397 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 YH |
398 | continue; |
399 | if (pos-- == 0) | |
6bd52143 | 400 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
401 | } |
402 | return NULL; | |
403 | } | |
404 | ||
405 | static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
406 | __acquires(mrt_lock) | |
407 | { | |
d1db275d | 408 | struct ipmr_vif_iter *iter = seq->private; |
8b90fc7e | 409 | struct net *net = seq_file_net(seq); |
d1db275d PM |
410 | struct mr6_table *mrt; |
411 | ||
412 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); | |
63159f29 | 413 | if (!mrt) |
d1db275d PM |
414 | return ERR_PTR(-ENOENT); |
415 | ||
416 | iter->mrt = mrt; | |
8b90fc7e | 417 | |
7bc570c8 | 418 | read_lock(&mrt_lock); |
8b90fc7e BT |
419 | return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) |
420 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
421 | } |
422 | ||
423 | static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
424 | { | |
425 | struct ipmr_vif_iter *iter = seq->private; | |
8b90fc7e | 426 | struct net *net = seq_file_net(seq); |
d1db275d | 427 | struct mr6_table *mrt = iter->mrt; |
7bc570c8 YH |
428 | |
429 | ++*pos; | |
430 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 431 | return ip6mr_vif_seq_idx(net, iter, 0); |
7bc570c8 | 432 | |
6bd52143 PM |
433 | while (++iter->ct < mrt->maxvif) { |
434 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 | 435 | continue; |
6bd52143 | 436 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
437 | } |
438 | return NULL; | |
439 | } | |
440 | ||
441 | static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) | |
442 | __releases(mrt_lock) | |
443 | { | |
444 | read_unlock(&mrt_lock); | |
445 | } | |
446 | ||
447 | static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) | |
448 | { | |
d1db275d PM |
449 | struct ipmr_vif_iter *iter = seq->private; |
450 | struct mr6_table *mrt = iter->mrt; | |
8b90fc7e | 451 | |
7bc570c8 YH |
452 | if (v == SEQ_START_TOKEN) { |
453 | seq_puts(seq, | |
454 | "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); | |
455 | } else { | |
456 | const struct mif_device *vif = v; | |
457 | const char *name = vif->dev ? vif->dev->name : "none"; | |
458 | ||
459 | seq_printf(seq, | |
d430a227 | 460 | "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", |
6bd52143 | 461 | vif - mrt->vif6_table, |
7bc570c8 YH |
462 | name, vif->bytes_in, vif->pkt_in, |
463 | vif->bytes_out, vif->pkt_out, | |
464 | vif->flags); | |
465 | } | |
466 | return 0; | |
467 | } | |
468 | ||
98147d52 | 469 | static const struct seq_operations ip6mr_vif_seq_ops = { |
7bc570c8 YH |
470 | .start = ip6mr_vif_seq_start, |
471 | .next = ip6mr_vif_seq_next, | |
472 | .stop = ip6mr_vif_seq_stop, | |
473 | .show = ip6mr_vif_seq_show, | |
474 | }; | |
475 | ||
476 | static int ip6mr_vif_open(struct inode *inode, struct file *file) | |
477 | { | |
8b90fc7e BT |
478 | return seq_open_net(inode, file, &ip6mr_vif_seq_ops, |
479 | sizeof(struct ipmr_vif_iter)); | |
7bc570c8 YH |
480 | } |
481 | ||
5ca1b998 | 482 | static const struct file_operations ip6mr_vif_fops = { |
7bc570c8 YH |
483 | .owner = THIS_MODULE, |
484 | .open = ip6mr_vif_open, | |
485 | .read = seq_read, | |
486 | .llseek = seq_lseek, | |
8b90fc7e | 487 | .release = seq_release_net, |
7bc570c8 YH |
488 | }; |
489 | ||
490 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
491 | { | |
d1db275d | 492 | struct ipmr_mfc_iter *it = seq->private; |
8b90fc7e | 493 | struct net *net = seq_file_net(seq); |
d1db275d | 494 | struct mr6_table *mrt; |
8b90fc7e | 495 | |
d1db275d | 496 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 497 | if (!mrt) |
d1db275d PM |
498 | return ERR_PTR(-ENOENT); |
499 | ||
500 | it->mrt = mrt; | |
7c71a060 | 501 | it->cache = NULL; |
8b90fc7e BT |
502 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
503 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
504 | } |
505 | ||
506 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
507 | { | |
508 | struct mfc6_cache *mfc = v; | |
509 | struct ipmr_mfc_iter *it = seq->private; | |
8b90fc7e | 510 | struct net *net = seq_file_net(seq); |
d1db275d | 511 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
512 | |
513 | ++*pos; | |
514 | ||
515 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 516 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
7bc570c8 | 517 | |
f30a7784 PM |
518 | if (mfc->list.next != it->cache) |
519 | return list_entry(mfc->list.next, struct mfc6_cache, list); | |
7bc570c8 | 520 | |
6bd52143 | 521 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 YH |
522 | goto end_of_list; |
523 | ||
6bd52143 | 524 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
7bc570c8 | 525 | |
4a6258a0 | 526 | while (++it->ct < MFC6_LINES) { |
6bd52143 | 527 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 PM |
528 | if (list_empty(it->cache)) |
529 | continue; | |
530 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
531 | } |
532 | ||
533 | /* exhausted cache_array, show unresolved */ | |
534 | read_unlock(&mrt_lock); | |
6bd52143 | 535 | it->cache = &mrt->mfc6_unres_queue; |
7bc570c8 YH |
536 | it->ct = 0; |
537 | ||
538 | spin_lock_bh(&mfc_unres_lock); | |
f30a7784 PM |
539 | if (!list_empty(it->cache)) |
540 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
541 | |
542 | end_of_list: | |
543 | spin_unlock_bh(&mfc_unres_lock); | |
544 | it->cache = NULL; | |
545 | ||
546 | return NULL; | |
547 | } | |
548 | ||
549 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
550 | { | |
551 | struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 552 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 553 | |
6bd52143 | 554 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 | 555 | spin_unlock_bh(&mfc_unres_lock); |
25b4a44c | 556 | else if (it->cache == &mrt->mfc6_cache_array[it->ct]) |
7bc570c8 YH |
557 | read_unlock(&mrt_lock); |
558 | } | |
559 | ||
560 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
561 | { | |
562 | int n; | |
563 | ||
564 | if (v == SEQ_START_TOKEN) { | |
565 | seq_puts(seq, | |
566 | "Group " | |
567 | "Origin " | |
568 | "Iif Pkts Bytes Wrong Oifs\n"); | |
569 | } else { | |
570 | const struct mfc6_cache *mfc = v; | |
571 | const struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 572 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 573 | |
999890b2 | 574 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
0c6ce78a | 575 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
1ea472e2 | 576 | mfc->mf6c_parent); |
7bc570c8 | 577 | |
6bd52143 | 578 | if (it->cache != &mrt->mfc6_unres_queue) { |
1ea472e2 BT |
579 | seq_printf(seq, " %8lu %8lu %8lu", |
580 | mfc->mfc_un.res.pkt, | |
581 | mfc->mfc_un.res.bytes, | |
582 | mfc->mfc_un.res.wrong_if); | |
7bc570c8 YH |
583 | for (n = mfc->mfc_un.res.minvif; |
584 | n < mfc->mfc_un.res.maxvif; n++) { | |
6bd52143 | 585 | if (MIF_EXISTS(mrt, n) && |
7bc570c8 YH |
586 | mfc->mfc_un.res.ttls[n] < 255) |
587 | seq_printf(seq, | |
588 | " %2d:%-3d", | |
589 | n, mfc->mfc_un.res.ttls[n]); | |
590 | } | |
1ea472e2 BT |
591 | } else { |
592 | /* unresolved mfc_caches don't contain | |
593 | * pkt, bytes and wrong_if values | |
594 | */ | |
595 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
7bc570c8 YH |
596 | } |
597 | seq_putc(seq, '\n'); | |
598 | } | |
599 | return 0; | |
600 | } | |
601 | ||
88e9d34c | 602 | static const struct seq_operations ipmr_mfc_seq_ops = { |
7bc570c8 YH |
603 | .start = ipmr_mfc_seq_start, |
604 | .next = ipmr_mfc_seq_next, | |
605 | .stop = ipmr_mfc_seq_stop, | |
606 | .show = ipmr_mfc_seq_show, | |
607 | }; | |
608 | ||
609 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
610 | { | |
8b90fc7e BT |
611 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
612 | sizeof(struct ipmr_mfc_iter)); | |
7bc570c8 YH |
613 | } |
614 | ||
5ca1b998 | 615 | static const struct file_operations ip6mr_mfc_fops = { |
7bc570c8 YH |
616 | .owner = THIS_MODULE, |
617 | .open = ipmr_mfc_open, | |
618 | .read = seq_read, | |
619 | .llseek = seq_lseek, | |
8b90fc7e | 620 | .release = seq_release_net, |
7bc570c8 YH |
621 | }; |
622 | #endif | |
623 | ||
14fb64e1 | 624 | #ifdef CONFIG_IPV6_PIMSM_V2 |
14fb64e1 YH |
625 | |
626 | static int pim6_rcv(struct sk_buff *skb) | |
627 | { | |
628 | struct pimreghdr *pim; | |
629 | struct ipv6hdr *encap; | |
630 | struct net_device *reg_dev = NULL; | |
8229efda | 631 | struct net *net = dev_net(skb->dev); |
d1db275d | 632 | struct mr6_table *mrt; |
4c9483b2 DM |
633 | struct flowi6 fl6 = { |
634 | .flowi6_iif = skb->dev->ifindex, | |
635 | .flowi6_mark = skb->mark, | |
d1db275d PM |
636 | }; |
637 | int reg_vif_num; | |
14fb64e1 YH |
638 | |
639 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) | |
640 | goto drop; | |
641 | ||
642 | pim = (struct pimreghdr *)skb_transport_header(skb); | |
56245cae | 643 | if (pim->type != ((PIM_VERSION << 4) | PIM_TYPE_REGISTER) || |
14fb64e1 | 644 | (pim->flags & PIM_NULL_REGISTER) || |
1d6e55f1 TG |
645 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
646 | sizeof(*pim), IPPROTO_PIM, | |
647 | csum_partial((void *)pim, sizeof(*pim), 0)) && | |
ec6b486f | 648 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
14fb64e1 YH |
649 | goto drop; |
650 | ||
651 | /* check if the inner packet is destined to mcast group */ | |
652 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + | |
653 | sizeof(*pim)); | |
654 | ||
655 | if (!ipv6_addr_is_multicast(&encap->daddr) || | |
656 | encap->payload_len == 0 || | |
657 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) | |
658 | goto drop; | |
659 | ||
4c9483b2 | 660 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d PM |
661 | goto drop; |
662 | reg_vif_num = mrt->mroute_reg_vif_num; | |
663 | ||
14fb64e1 YH |
664 | read_lock(&mrt_lock); |
665 | if (reg_vif_num >= 0) | |
6bd52143 | 666 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
14fb64e1 YH |
667 | if (reg_dev) |
668 | dev_hold(reg_dev); | |
669 | read_unlock(&mrt_lock); | |
670 | ||
63159f29 | 671 | if (!reg_dev) |
14fb64e1 YH |
672 | goto drop; |
673 | ||
674 | skb->mac_header = skb->network_header; | |
675 | skb_pull(skb, (u8 *)encap - skb->data); | |
676 | skb_reset_network_header(skb); | |
1d6e55f1 | 677 | skb->protocol = htons(ETH_P_IPV6); |
3e49e6d5 | 678 | skb->ip_summed = CHECKSUM_NONE; |
d19d56dd | 679 | |
ea23192e | 680 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); |
d19d56dd | 681 | |
caf586e5 | 682 | netif_rx(skb); |
8990f468 | 683 | |
14fb64e1 YH |
684 | dev_put(reg_dev); |
685 | return 0; | |
686 | drop: | |
687 | kfree_skb(skb); | |
688 | return 0; | |
689 | } | |
690 | ||
41135cc8 | 691 | static const struct inet6_protocol pim6_protocol = { |
14fb64e1 YH |
692 | .handler = pim6_rcv, |
693 | }; | |
694 | ||
695 | /* Service routines creating virtual interfaces: PIMREG */ | |
696 | ||
6fef4c0c SH |
697 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
698 | struct net_device *dev) | |
14fb64e1 | 699 | { |
8229efda | 700 | struct net *net = dev_net(dev); |
d1db275d | 701 | struct mr6_table *mrt; |
4c9483b2 DM |
702 | struct flowi6 fl6 = { |
703 | .flowi6_oif = dev->ifindex, | |
6a662719 | 704 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 | 705 | .flowi6_mark = skb->mark, |
d1db275d | 706 | }; |
d1db275d | 707 | |
78afc98e WB |
708 | if (!pskb_inet_may_pull(skb)) |
709 | goto tx_err; | |
710 | ||
711 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) | |
712 | goto tx_err; | |
8229efda | 713 | |
14fb64e1 | 714 | read_lock(&mrt_lock); |
dc58c78c PE |
715 | dev->stats.tx_bytes += skb->len; |
716 | dev->stats.tx_packets++; | |
6bd52143 | 717 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
14fb64e1 YH |
718 | read_unlock(&mrt_lock); |
719 | kfree_skb(skb); | |
6ed10654 | 720 | return NETDEV_TX_OK; |
78afc98e WB |
721 | |
722 | tx_err: | |
723 | dev->stats.tx_errors++; | |
724 | kfree_skb(skb); | |
725 | return NETDEV_TX_OK; | |
14fb64e1 YH |
726 | } |
727 | ||
ee9b9596 ND |
728 | static int reg_vif_get_iflink(const struct net_device *dev) |
729 | { | |
730 | return 0; | |
731 | } | |
732 | ||
007c3838 SH |
733 | static const struct net_device_ops reg_vif_netdev_ops = { |
734 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 735 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
736 | }; |
737 | ||
14fb64e1 YH |
738 | static void reg_vif_setup(struct net_device *dev) |
739 | { | |
740 | dev->type = ARPHRD_PIMREG; | |
741 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; | |
742 | dev->flags = IFF_NOARP; | |
007c3838 | 743 | dev->netdev_ops = ®_vif_netdev_ops; |
cf124db5 | 744 | dev->needs_free_netdev = true; |
403dbb97 | 745 | dev->features |= NETIF_F_NETNS_LOCAL; |
14fb64e1 YH |
746 | } |
747 | ||
d1db275d | 748 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
14fb64e1 YH |
749 | { |
750 | struct net_device *dev; | |
d1db275d PM |
751 | char name[IFNAMSIZ]; |
752 | ||
753 | if (mrt->id == RT6_TABLE_DFLT) | |
754 | sprintf(name, "pim6reg"); | |
755 | else | |
756 | sprintf(name, "pim6reg%u", mrt->id); | |
14fb64e1 | 757 | |
c835a677 | 758 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
63159f29 | 759 | if (!dev) |
14fb64e1 YH |
760 | return NULL; |
761 | ||
8229efda BT |
762 | dev_net_set(dev, net); |
763 | ||
14fb64e1 YH |
764 | if (register_netdevice(dev)) { |
765 | free_netdev(dev); | |
766 | return NULL; | |
767 | } | |
14fb64e1 | 768 | |
14fb64e1 YH |
769 | if (dev_open(dev)) |
770 | goto failure; | |
771 | ||
7af3db78 | 772 | dev_hold(dev); |
14fb64e1 YH |
773 | return dev; |
774 | ||
775 | failure: | |
14fb64e1 YH |
776 | unregister_netdevice(dev); |
777 | return NULL; | |
778 | } | |
779 | #endif | |
780 | ||
7bc570c8 YH |
781 | /* |
782 | * Delete a VIF entry | |
783 | */ | |
784 | ||
723b929c NA |
785 | static int mif6_delete(struct mr6_table *mrt, int vifi, int notify, |
786 | struct list_head *head) | |
7bc570c8 YH |
787 | { |
788 | struct mif_device *v; | |
789 | struct net_device *dev; | |
1d6e55f1 | 790 | struct inet6_dev *in6_dev; |
6bd52143 PM |
791 | |
792 | if (vifi < 0 || vifi >= mrt->maxvif) | |
7bc570c8 YH |
793 | return -EADDRNOTAVAIL; |
794 | ||
6bd52143 | 795 | v = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
796 | |
797 | write_lock_bh(&mrt_lock); | |
798 | dev = v->dev; | |
799 | v->dev = NULL; | |
800 | ||
801 | if (!dev) { | |
802 | write_unlock_bh(&mrt_lock); | |
803 | return -EADDRNOTAVAIL; | |
804 | } | |
805 | ||
14fb64e1 | 806 | #ifdef CONFIG_IPV6_PIMSM_V2 |
6bd52143 PM |
807 | if (vifi == mrt->mroute_reg_vif_num) |
808 | mrt->mroute_reg_vif_num = -1; | |
14fb64e1 YH |
809 | #endif |
810 | ||
6bd52143 | 811 | if (vifi + 1 == mrt->maxvif) { |
7bc570c8 YH |
812 | int tmp; |
813 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
6bd52143 | 814 | if (MIF_EXISTS(mrt, tmp)) |
7bc570c8 YH |
815 | break; |
816 | } | |
6bd52143 | 817 | mrt->maxvif = tmp + 1; |
7bc570c8 YH |
818 | } |
819 | ||
820 | write_unlock_bh(&mrt_lock); | |
821 | ||
822 | dev_set_allmulti(dev, -1); | |
823 | ||
1d6e55f1 | 824 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 825 | if (in6_dev) { |
1d6e55f1 | 826 | in6_dev->cnf.mc_forwarding--; |
85b3daad | 827 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
828 | NETCONFA_MC_FORWARDING, |
829 | dev->ifindex, &in6_dev->cnf); | |
830 | } | |
1d6e55f1 | 831 | |
723b929c | 832 | if ((v->flags & MIFF_REGISTER) && !notify) |
c871e664 | 833 | unregister_netdevice_queue(dev, head); |
7bc570c8 YH |
834 | |
835 | dev_put(dev); | |
836 | return 0; | |
837 | } | |
838 | ||
58701ad4 BT |
839 | static inline void ip6mr_cache_free(struct mfc6_cache *c) |
840 | { | |
58701ad4 BT |
841 | kmem_cache_free(mrt_cachep, c); |
842 | } | |
843 | ||
7bc570c8 YH |
844 | /* Destroy an unresolved cache entry, killing queued skbs |
845 | and reporting error to netlink readers. | |
846 | */ | |
847 | ||
6bd52143 | 848 | static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) |
7bc570c8 | 849 | { |
6bd52143 | 850 | struct net *net = read_pnet(&mrt->net); |
7bc570c8 YH |
851 | struct sk_buff *skb; |
852 | ||
6bd52143 | 853 | atomic_dec(&mrt->cache_resolve_queue_len); |
7bc570c8 | 854 | |
67ba4152 | 855 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { |
7bc570c8 | 856 | if (ipv6_hdr(skb)->version == 0) { |
af72868b JB |
857 | struct nlmsghdr *nlh = skb_pull(skb, |
858 | sizeof(struct ipv6hdr)); | |
7bc570c8 | 859 | nlh->nlmsg_type = NLMSG_ERROR; |
573ce260 | 860 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 861 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 862 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; |
15e47304 | 863 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 YH |
864 | } else |
865 | kfree_skb(skb); | |
866 | } | |
867 | ||
58701ad4 | 868 | ip6mr_cache_free(c); |
7bc570c8 YH |
869 | } |
870 | ||
871 | ||
c476efbc | 872 | /* Timer process for all the unresolved queue. */ |
7bc570c8 | 873 | |
6bd52143 | 874 | static void ipmr_do_expire_process(struct mr6_table *mrt) |
7bc570c8 YH |
875 | { |
876 | unsigned long now = jiffies; | |
877 | unsigned long expires = 10 * HZ; | |
f30a7784 | 878 | struct mfc6_cache *c, *next; |
7bc570c8 | 879 | |
6bd52143 | 880 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
7bc570c8 YH |
881 | if (time_after(c->mfc_un.unres.expires, now)) { |
882 | /* not yet... */ | |
883 | unsigned long interval = c->mfc_un.unres.expires - now; | |
884 | if (interval < expires) | |
885 | expires = interval; | |
7bc570c8 YH |
886 | continue; |
887 | } | |
888 | ||
f30a7784 | 889 | list_del(&c->list); |
812e44dd | 890 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 891 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
892 | } |
893 | ||
6bd52143 PM |
894 | if (!list_empty(&mrt->mfc6_unres_queue)) |
895 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
7bc570c8 YH |
896 | } |
897 | ||
e99e88a9 | 898 | static void ipmr_expire_process(struct timer_list *t) |
7bc570c8 | 899 | { |
e99e88a9 | 900 | struct mr6_table *mrt = from_timer(mrt, t, ipmr_expire_timer); |
c476efbc | 901 | |
7bc570c8 | 902 | if (!spin_trylock(&mfc_unres_lock)) { |
6bd52143 | 903 | mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); |
7bc570c8 YH |
904 | return; |
905 | } | |
906 | ||
6bd52143 PM |
907 | if (!list_empty(&mrt->mfc6_unres_queue)) |
908 | ipmr_do_expire_process(mrt); | |
7bc570c8 YH |
909 | |
910 | spin_unlock(&mfc_unres_lock); | |
911 | } | |
912 | ||
913 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
914 | ||
6bd52143 | 915 | static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, |
b5aa30b1 | 916 | unsigned char *ttls) |
7bc570c8 YH |
917 | { |
918 | int vifi; | |
919 | ||
6ac7eb08 | 920 | cache->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 | 921 | cache->mfc_un.res.maxvif = 0; |
6ac7eb08 | 922 | memset(cache->mfc_un.res.ttls, 255, MAXMIFS); |
7bc570c8 | 923 | |
6bd52143 PM |
924 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
925 | if (MIF_EXISTS(mrt, vifi) && | |
4e16880c | 926 | ttls[vifi] && ttls[vifi] < 255) { |
7bc570c8 YH |
927 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
928 | if (cache->mfc_un.res.minvif > vifi) | |
929 | cache->mfc_un.res.minvif = vifi; | |
930 | if (cache->mfc_un.res.maxvif <= vifi) | |
931 | cache->mfc_un.res.maxvif = vifi + 1; | |
932 | } | |
933 | } | |
90b5ca17 | 934 | cache->mfc_un.res.lastuse = jiffies; |
7bc570c8 YH |
935 | } |
936 | ||
6bd52143 PM |
937 | static int mif6_add(struct net *net, struct mr6_table *mrt, |
938 | struct mif6ctl *vifc, int mrtsock) | |
7bc570c8 YH |
939 | { |
940 | int vifi = vifc->mif6c_mifi; | |
6bd52143 | 941 | struct mif_device *v = &mrt->vif6_table[vifi]; |
7bc570c8 | 942 | struct net_device *dev; |
1d6e55f1 | 943 | struct inet6_dev *in6_dev; |
5ae7b444 | 944 | int err; |
7bc570c8 YH |
945 | |
946 | /* Is vif busy ? */ | |
6bd52143 | 947 | if (MIF_EXISTS(mrt, vifi)) |
7bc570c8 YH |
948 | return -EADDRINUSE; |
949 | ||
950 | switch (vifc->mif6c_flags) { | |
14fb64e1 YH |
951 | #ifdef CONFIG_IPV6_PIMSM_V2 |
952 | case MIFF_REGISTER: | |
953 | /* | |
954 | * Special Purpose VIF in PIM | |
955 | * All the packets will be sent to the daemon | |
956 | */ | |
6bd52143 | 957 | if (mrt->mroute_reg_vif_num >= 0) |
14fb64e1 | 958 | return -EADDRINUSE; |
d1db275d | 959 | dev = ip6mr_reg_vif(net, mrt); |
14fb64e1 YH |
960 | if (!dev) |
961 | return -ENOBUFS; | |
5ae7b444 WC |
962 | err = dev_set_allmulti(dev, 1); |
963 | if (err) { | |
964 | unregister_netdevice(dev); | |
7af3db78 | 965 | dev_put(dev); |
5ae7b444 WC |
966 | return err; |
967 | } | |
14fb64e1 YH |
968 | break; |
969 | #endif | |
7bc570c8 | 970 | case 0: |
8229efda | 971 | dev = dev_get_by_index(net, vifc->mif6c_pifi); |
7bc570c8 YH |
972 | if (!dev) |
973 | return -EADDRNOTAVAIL; | |
5ae7b444 | 974 | err = dev_set_allmulti(dev, 1); |
7af3db78 WC |
975 | if (err) { |
976 | dev_put(dev); | |
5ae7b444 | 977 | return err; |
7af3db78 | 978 | } |
7bc570c8 YH |
979 | break; |
980 | default: | |
981 | return -EINVAL; | |
982 | } | |
983 | ||
1d6e55f1 | 984 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 985 | if (in6_dev) { |
1d6e55f1 | 986 | in6_dev->cnf.mc_forwarding++; |
85b3daad | 987 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
988 | NETCONFA_MC_FORWARDING, |
989 | dev->ifindex, &in6_dev->cnf); | |
990 | } | |
1d6e55f1 | 991 | |
7bc570c8 YH |
992 | /* |
993 | * Fill in the VIF structures | |
994 | */ | |
995 | v->rate_limit = vifc->vifc_rate_limit; | |
996 | v->flags = vifc->mif6c_flags; | |
997 | if (!mrtsock) | |
998 | v->flags |= VIFF_STATIC; | |
999 | v->threshold = vifc->vifc_threshold; | |
1000 | v->bytes_in = 0; | |
1001 | v->bytes_out = 0; | |
1002 | v->pkt_in = 0; | |
1003 | v->pkt_out = 0; | |
1004 | v->link = dev->ifindex; | |
1005 | if (v->flags & MIFF_REGISTER) | |
a54acb3a | 1006 | v->link = dev_get_iflink(dev); |
7bc570c8 YH |
1007 | |
1008 | /* And finish update writing critical data */ | |
1009 | write_lock_bh(&mrt_lock); | |
7bc570c8 | 1010 | v->dev = dev; |
14fb64e1 YH |
1011 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1012 | if (v->flags & MIFF_REGISTER) | |
6bd52143 | 1013 | mrt->mroute_reg_vif_num = vifi; |
14fb64e1 | 1014 | #endif |
6bd52143 PM |
1015 | if (vifi + 1 > mrt->maxvif) |
1016 | mrt->maxvif = vifi + 1; | |
7bc570c8 YH |
1017 | write_unlock_bh(&mrt_lock); |
1018 | return 0; | |
1019 | } | |
1020 | ||
6bd52143 | 1021 | static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt, |
b71d1d42 ED |
1022 | const struct in6_addr *origin, |
1023 | const struct in6_addr *mcastgrp) | |
7bc570c8 YH |
1024 | { |
1025 | int line = MFC6_HASH(mcastgrp, origin); | |
1026 | struct mfc6_cache *c; | |
1027 | ||
6bd52143 | 1028 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 YH |
1029 | if (ipv6_addr_equal(&c->mf6c_origin, origin) && |
1030 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) | |
f30a7784 | 1031 | return c; |
7bc570c8 | 1032 | } |
f30a7784 | 1033 | return NULL; |
7bc570c8 YH |
1034 | } |
1035 | ||
660b26dc ND |
1036 | /* Look for a (*,*,oif) entry */ |
1037 | static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt, | |
1038 | mifi_t mifi) | |
1039 | { | |
1040 | int line = MFC6_HASH(&in6addr_any, &in6addr_any); | |
1041 | struct mfc6_cache *c; | |
1042 | ||
1043 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1044 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1045 | ipv6_addr_any(&c->mf6c_mcastgrp) && | |
1046 | (c->mfc_un.res.ttls[mifi] < 255)) | |
1047 | return c; | |
1048 | ||
1049 | return NULL; | |
1050 | } | |
1051 | ||
1052 | /* Look for a (*,G) entry */ | |
1053 | static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt, | |
1054 | struct in6_addr *mcastgrp, | |
1055 | mifi_t mifi) | |
1056 | { | |
1057 | int line = MFC6_HASH(mcastgrp, &in6addr_any); | |
1058 | struct mfc6_cache *c, *proxy; | |
1059 | ||
1060 | if (ipv6_addr_any(mcastgrp)) | |
1061 | goto skip; | |
1062 | ||
1063 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1064 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1065 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) { | |
1066 | if (c->mfc_un.res.ttls[mifi] < 255) | |
1067 | return c; | |
1068 | ||
1069 | /* It's ok if the mifi is part of the static tree */ | |
1070 | proxy = ip6mr_cache_find_any_parent(mrt, | |
1071 | c->mf6c_parent); | |
1072 | if (proxy && proxy->mfc_un.res.ttls[mifi] < 255) | |
1073 | return c; | |
1074 | } | |
1075 | ||
1076 | skip: | |
1077 | return ip6mr_cache_find_any_parent(mrt, mifi); | |
1078 | } | |
1079 | ||
7bc570c8 YH |
1080 | /* |
1081 | * Allocate a multicast cache entry | |
1082 | */ | |
b5aa30b1 | 1083 | static struct mfc6_cache *ip6mr_cache_alloc(void) |
7bc570c8 | 1084 | { |
36cbac59 | 1085 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
63159f29 | 1086 | if (!c) |
7bc570c8 | 1087 | return NULL; |
70a0dec4 | 1088 | c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1; |
6ac7eb08 | 1089 | c->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 YH |
1090 | return c; |
1091 | } | |
1092 | ||
b5aa30b1 | 1093 | static struct mfc6_cache *ip6mr_cache_alloc_unres(void) |
7bc570c8 | 1094 | { |
36cbac59 | 1095 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
63159f29 | 1096 | if (!c) |
7bc570c8 | 1097 | return NULL; |
7bc570c8 YH |
1098 | skb_queue_head_init(&c->mfc_un.unres.unresolved); |
1099 | c->mfc_un.unres.expires = jiffies + 10 * HZ; | |
1100 | return c; | |
1101 | } | |
1102 | ||
1103 | /* | |
1104 | * A cache entry has gone into a resolved state from queued | |
1105 | */ | |
1106 | ||
6bd52143 PM |
1107 | static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt, |
1108 | struct mfc6_cache *uc, struct mfc6_cache *c) | |
7bc570c8 YH |
1109 | { |
1110 | struct sk_buff *skb; | |
1111 | ||
1112 | /* | |
1113 | * Play the pending entries through our router | |
1114 | */ | |
1115 | ||
67ba4152 | 1116 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
7bc570c8 | 1117 | if (ipv6_hdr(skb)->version == 0) { |
af72868b JB |
1118 | struct nlmsghdr *nlh = skb_pull(skb, |
1119 | sizeof(struct ipv6hdr)); | |
7bc570c8 | 1120 | |
573ce260 | 1121 | if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
549e028d | 1122 | nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; |
7bc570c8 YH |
1123 | } else { |
1124 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1125 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 1126 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1127 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; |
7bc570c8 | 1128 | } |
15e47304 | 1129 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 | 1130 | } else |
6bd52143 | 1131 | ip6_mr_forward(net, mrt, skb, c); |
7bc570c8 YH |
1132 | } |
1133 | } | |
1134 | ||
1135 | /* | |
dd12d15c | 1136 | * Bounce a cache query up to pim6sd and netlink. |
7bc570c8 YH |
1137 | * |
1138 | * Called under mrt_lock. | |
1139 | */ | |
1140 | ||
6bd52143 PM |
1141 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
1142 | mifi_t mifi, int assert) | |
7bc570c8 YH |
1143 | { |
1144 | struct sk_buff *skb; | |
1145 | struct mrt6msg *msg; | |
1146 | int ret; | |
1147 | ||
14fb64e1 YH |
1148 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1149 | if (assert == MRT6MSG_WHOLEPKT) | |
1150 | skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt) | |
1151 | +sizeof(*msg)); | |
1152 | else | |
1153 | #endif | |
1154 | skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC); | |
7bc570c8 YH |
1155 | |
1156 | if (!skb) | |
1157 | return -ENOBUFS; | |
1158 | ||
1159 | /* I suppose that internal messages | |
1160 | * do not require checksums */ | |
1161 | ||
1162 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1163 | ||
14fb64e1 YH |
1164 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1165 | if (assert == MRT6MSG_WHOLEPKT) { | |
1166 | /* Ugly, but we have no choice with this interface. | |
1167 | Duplicate old header, fix length etc. | |
1168 | And all this only to mangle msg->im6_msgtype and | |
1169 | to set msg->im6_mbz to "mbz" :-) | |
1170 | */ | |
1171 | skb_push(skb, -skb_network_offset(pkt)); | |
1172 | ||
1173 | skb_push(skb, sizeof(*msg)); | |
1174 | skb_reset_transport_header(skb); | |
1175 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1176 | msg->im6_mbz = 0; | |
1177 | msg->im6_msgtype = MRT6MSG_WHOLEPKT; | |
6bd52143 | 1178 | msg->im6_mif = mrt->mroute_reg_vif_num; |
14fb64e1 | 1179 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1180 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1181 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
14fb64e1 YH |
1182 | |
1183 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1184 | } else | |
1185 | #endif | |
1186 | { | |
7bc570c8 YH |
1187 | /* |
1188 | * Copy the IP header | |
1189 | */ | |
1190 | ||
1191 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1192 | skb_reset_network_header(skb); | |
1193 | skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr)); | |
1194 | ||
1195 | /* | |
1196 | * Add our header | |
1197 | */ | |
1198 | skb_put(skb, sizeof(*msg)); | |
1199 | skb_reset_transport_header(skb); | |
1200 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1201 | ||
1202 | msg->im6_mbz = 0; | |
1203 | msg->im6_msgtype = assert; | |
6ac7eb08 | 1204 | msg->im6_mif = mifi; |
7bc570c8 | 1205 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1206 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1207 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
7bc570c8 | 1208 | |
adf30907 | 1209 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); |
7bc570c8 | 1210 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
14fb64e1 | 1211 | } |
7bc570c8 | 1212 | |
63159f29 | 1213 | if (!mrt->mroute6_sk) { |
7bc570c8 YH |
1214 | kfree_skb(skb); |
1215 | return -EINVAL; | |
1216 | } | |
1217 | ||
dd12d15c JG |
1218 | mrt6msg_netlink_event(mrt, skb); |
1219 | ||
7bc570c8 YH |
1220 | /* |
1221 | * Deliver to user space multicast routing algorithms | |
1222 | */ | |
6bd52143 | 1223 | ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); |
bd91b8bf | 1224 | if (ret < 0) { |
e87cc472 | 1225 | net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); |
7bc570c8 YH |
1226 | kfree_skb(skb); |
1227 | } | |
1228 | ||
1229 | return ret; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * Queue a packet for resolution. It gets locked cache entry! | |
1234 | */ | |
1235 | ||
1236 | static int | |
6bd52143 | 1237 | ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) |
7bc570c8 | 1238 | { |
f30a7784 | 1239 | bool found = false; |
7bc570c8 YH |
1240 | int err; |
1241 | struct mfc6_cache *c; | |
1242 | ||
1243 | spin_lock_bh(&mfc_unres_lock); | |
6bd52143 | 1244 | list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1245 | if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && |
f30a7784 PM |
1246 | ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { |
1247 | found = true; | |
7bc570c8 | 1248 | break; |
f30a7784 | 1249 | } |
7bc570c8 YH |
1250 | } |
1251 | ||
f30a7784 | 1252 | if (!found) { |
7bc570c8 YH |
1253 | /* |
1254 | * Create a new entry if allowable | |
1255 | */ | |
1256 | ||
6bd52143 | 1257 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
b5aa30b1 | 1258 | (c = ip6mr_cache_alloc_unres()) == NULL) { |
7bc570c8 YH |
1259 | spin_unlock_bh(&mfc_unres_lock); |
1260 | ||
1261 | kfree_skb(skb); | |
1262 | return -ENOBUFS; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Fill in the new cache entry | |
1267 | */ | |
1268 | c->mf6c_parent = -1; | |
1269 | c->mf6c_origin = ipv6_hdr(skb)->saddr; | |
1270 | c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; | |
1271 | ||
1272 | /* | |
1273 | * Reflect first query at pim6sd | |
1274 | */ | |
6bd52143 | 1275 | err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); |
8229efda | 1276 | if (err < 0) { |
7bc570c8 YH |
1277 | /* If the report failed throw the cache entry |
1278 | out - Brad Parker | |
1279 | */ | |
1280 | spin_unlock_bh(&mfc_unres_lock); | |
1281 | ||
58701ad4 | 1282 | ip6mr_cache_free(c); |
7bc570c8 YH |
1283 | kfree_skb(skb); |
1284 | return err; | |
1285 | } | |
1286 | ||
6bd52143 PM |
1287 | atomic_inc(&mrt->cache_resolve_queue_len); |
1288 | list_add(&c->list, &mrt->mfc6_unres_queue); | |
812e44dd | 1289 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 | 1290 | |
6bd52143 | 1291 | ipmr_do_expire_process(mrt); |
7bc570c8 YH |
1292 | } |
1293 | ||
1294 | /* | |
1295 | * See if we can append the packet | |
1296 | */ | |
1297 | if (c->mfc_un.unres.unresolved.qlen > 3) { | |
1298 | kfree_skb(skb); | |
1299 | err = -ENOBUFS; | |
1300 | } else { | |
1301 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); | |
1302 | err = 0; | |
1303 | } | |
1304 | ||
1305 | spin_unlock_bh(&mfc_unres_lock); | |
1306 | return err; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * MFC6 cache manipulation by user space | |
1311 | */ | |
1312 | ||
660b26dc ND |
1313 | static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, |
1314 | int parent) | |
7bc570c8 YH |
1315 | { |
1316 | int line; | |
f30a7784 | 1317 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1318 | |
1319 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1320 | ||
6bd52143 | 1321 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1322 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1323 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1324 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1325 | (parent == -1 || parent == c->mf6c_parent)) { | |
7bc570c8 | 1326 | write_lock_bh(&mrt_lock); |
f30a7784 | 1327 | list_del(&c->list); |
7bc570c8 YH |
1328 | write_unlock_bh(&mrt_lock); |
1329 | ||
812e44dd | 1330 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1331 | ip6mr_cache_free(c); |
7bc570c8 YH |
1332 | return 0; |
1333 | } | |
1334 | } | |
1335 | return -ENOENT; | |
1336 | } | |
1337 | ||
1338 | static int ip6mr_device_event(struct notifier_block *this, | |
1339 | unsigned long event, void *ptr) | |
1340 | { | |
351638e7 | 1341 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
8229efda | 1342 | struct net *net = dev_net(dev); |
d1db275d | 1343 | struct mr6_table *mrt; |
7bc570c8 YH |
1344 | struct mif_device *v; |
1345 | int ct; | |
1346 | ||
7bc570c8 YH |
1347 | if (event != NETDEV_UNREGISTER) |
1348 | return NOTIFY_DONE; | |
1349 | ||
d1db275d PM |
1350 | ip6mr_for_each_table(mrt, net) { |
1351 | v = &mrt->vif6_table[0]; | |
1352 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1353 | if (v->dev == dev) | |
723b929c | 1354 | mif6_delete(mrt, ct, 1, NULL); |
d1db275d | 1355 | } |
7bc570c8 | 1356 | } |
c871e664 | 1357 | |
7bc570c8 YH |
1358 | return NOTIFY_DONE; |
1359 | } | |
1360 | ||
1361 | static struct notifier_block ip6_mr_notifier = { | |
1362 | .notifier_call = ip6mr_device_event | |
1363 | }; | |
1364 | ||
1365 | /* | |
1366 | * Setup for IP multicast routing | |
1367 | */ | |
1368 | ||
4e16880c BT |
1369 | static int __net_init ip6mr_net_init(struct net *net) |
1370 | { | |
d1db275d | 1371 | int err; |
f30a7784 | 1372 | |
d1db275d PM |
1373 | err = ip6mr_rules_init(net); |
1374 | if (err < 0) | |
4e16880c | 1375 | goto fail; |
8b90fc7e BT |
1376 | |
1377 | #ifdef CONFIG_PROC_FS | |
1378 | err = -ENOMEM; | |
d4beaa66 | 1379 | if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) |
8b90fc7e | 1380 | goto proc_vif_fail; |
d4beaa66 | 1381 | if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) |
8b90fc7e BT |
1382 | goto proc_cache_fail; |
1383 | #endif | |
6bd52143 | 1384 | |
4a6258a0 BT |
1385 | return 0; |
1386 | ||
8b90fc7e BT |
1387 | #ifdef CONFIG_PROC_FS |
1388 | proc_cache_fail: | |
ece31ffd | 1389 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
8b90fc7e | 1390 | proc_vif_fail: |
d1db275d | 1391 | ip6mr_rules_exit(net); |
8b90fc7e | 1392 | #endif |
4e16880c BT |
1393 | fail: |
1394 | return err; | |
1395 | } | |
1396 | ||
1397 | static void __net_exit ip6mr_net_exit(struct net *net) | |
1398 | { | |
8b90fc7e | 1399 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
1400 | remove_proc_entry("ip6_mr_cache", net->proc_net); |
1401 | remove_proc_entry("ip6_mr_vif", net->proc_net); | |
8b90fc7e | 1402 | #endif |
d1db275d | 1403 | ip6mr_rules_exit(net); |
4e16880c BT |
1404 | } |
1405 | ||
1406 | static struct pernet_operations ip6mr_net_ops = { | |
1407 | .init = ip6mr_net_init, | |
1408 | .exit = ip6mr_net_exit, | |
1409 | }; | |
1410 | ||
623d1a1a | 1411 | int __init ip6_mr_init(void) |
7bc570c8 | 1412 | { |
623d1a1a WC |
1413 | int err; |
1414 | ||
7bc570c8 YH |
1415 | mrt_cachep = kmem_cache_create("ip6_mrt_cache", |
1416 | sizeof(struct mfc6_cache), | |
1417 | 0, SLAB_HWCACHE_ALIGN, | |
1418 | NULL); | |
1419 | if (!mrt_cachep) | |
623d1a1a | 1420 | return -ENOMEM; |
7bc570c8 | 1421 | |
4e16880c BT |
1422 | err = register_pernet_subsys(&ip6mr_net_ops); |
1423 | if (err) | |
1424 | goto reg_pernet_fail; | |
1425 | ||
623d1a1a WC |
1426 | err = register_netdevice_notifier(&ip6_mr_notifier); |
1427 | if (err) | |
1428 | goto reg_notif_fail; | |
403dbb97 TG |
1429 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1430 | if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { | |
f3213831 | 1431 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
1432 | err = -EAGAIN; |
1433 | goto add_proto_fail; | |
1434 | } | |
1435 | #endif | |
c7ac8679 | 1436 | rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, |
b97bac64 | 1437 | ip6mr_rtm_dumproute, 0); |
623d1a1a | 1438 | return 0; |
403dbb97 TG |
1439 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1440 | add_proto_fail: | |
1441 | unregister_netdevice_notifier(&ip6_mr_notifier); | |
1442 | #endif | |
87b30a65 | 1443 | reg_notif_fail: |
4e16880c BT |
1444 | unregister_pernet_subsys(&ip6mr_net_ops); |
1445 | reg_pernet_fail: | |
87b30a65 | 1446 | kmem_cache_destroy(mrt_cachep); |
623d1a1a | 1447 | return err; |
7bc570c8 YH |
1448 | } |
1449 | ||
623d1a1a WC |
1450 | void ip6_mr_cleanup(void) |
1451 | { | |
ffb1388a DJ |
1452 | rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE); |
1453 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1454 | inet6_del_protocol(&pim6_protocol, IPPROTO_PIM); | |
1455 | #endif | |
623d1a1a | 1456 | unregister_netdevice_notifier(&ip6_mr_notifier); |
4e16880c | 1457 | unregister_pernet_subsys(&ip6mr_net_ops); |
623d1a1a WC |
1458 | kmem_cache_destroy(mrt_cachep); |
1459 | } | |
7bc570c8 | 1460 | |
6bd52143 | 1461 | static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, |
660b26dc | 1462 | struct mf6cctl *mfc, int mrtsock, int parent) |
7bc570c8 | 1463 | { |
f30a7784 | 1464 | bool found = false; |
7bc570c8 | 1465 | int line; |
f30a7784 | 1466 | struct mfc6_cache *uc, *c; |
6ac7eb08 | 1467 | unsigned char ttls[MAXMIFS]; |
7bc570c8 YH |
1468 | int i; |
1469 | ||
a50436f2 PM |
1470 | if (mfc->mf6cc_parent >= MAXMIFS) |
1471 | return -ENFILE; | |
1472 | ||
6ac7eb08 RR |
1473 | memset(ttls, 255, MAXMIFS); |
1474 | for (i = 0; i < MAXMIFS; i++) { | |
7bc570c8 YH |
1475 | if (IF_ISSET(i, &mfc->mf6cc_ifset)) |
1476 | ttls[i] = 1; | |
1477 | ||
1478 | } | |
1479 | ||
1480 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1481 | ||
6bd52143 | 1482 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1483 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1484 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1485 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1486 | (parent == -1 || parent == mfc->mf6cc_parent)) { | |
f30a7784 | 1487 | found = true; |
7bc570c8 | 1488 | break; |
f30a7784 | 1489 | } |
7bc570c8 YH |
1490 | } |
1491 | ||
f30a7784 | 1492 | if (found) { |
7bc570c8 YH |
1493 | write_lock_bh(&mrt_lock); |
1494 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1495 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1496 | if (!mrtsock) |
1497 | c->mfc_flags |= MFC_STATIC; | |
1498 | write_unlock_bh(&mrt_lock); | |
812e44dd | 1499 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1500 | return 0; |
1501 | } | |
1502 | ||
660b26dc ND |
1503 | if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && |
1504 | !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) | |
7bc570c8 YH |
1505 | return -EINVAL; |
1506 | ||
b5aa30b1 | 1507 | c = ip6mr_cache_alloc(); |
63159f29 | 1508 | if (!c) |
7bc570c8 YH |
1509 | return -ENOMEM; |
1510 | ||
1511 | c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; | |
1512 | c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; | |
1513 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1514 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1515 | if (!mrtsock) |
1516 | c->mfc_flags |= MFC_STATIC; | |
1517 | ||
1518 | write_lock_bh(&mrt_lock); | |
6bd52143 | 1519 | list_add(&c->list, &mrt->mfc6_cache_array[line]); |
7bc570c8 YH |
1520 | write_unlock_bh(&mrt_lock); |
1521 | ||
1522 | /* | |
1523 | * Check to see if we resolved a queued list. If so we | |
1524 | * need to send on the frames and tidy up. | |
1525 | */ | |
f30a7784 | 1526 | found = false; |
7bc570c8 | 1527 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1528 | list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1529 | if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && |
7bc570c8 | 1530 | ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { |
f30a7784 | 1531 | list_del(&uc->list); |
6bd52143 | 1532 | atomic_dec(&mrt->cache_resolve_queue_len); |
f30a7784 | 1533 | found = true; |
7bc570c8 YH |
1534 | break; |
1535 | } | |
1536 | } | |
6bd52143 PM |
1537 | if (list_empty(&mrt->mfc6_unres_queue)) |
1538 | del_timer(&mrt->ipmr_expire_timer); | |
7bc570c8 YH |
1539 | spin_unlock_bh(&mfc_unres_lock); |
1540 | ||
f30a7784 | 1541 | if (found) { |
6bd52143 | 1542 | ip6mr_cache_resolve(net, mrt, uc, c); |
58701ad4 | 1543 | ip6mr_cache_free(uc); |
7bc570c8 | 1544 | } |
812e44dd | 1545 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1546 | return 0; |
1547 | } | |
1548 | ||
1549 | /* | |
1550 | * Close the multicast socket, and clear the vif tables etc | |
1551 | */ | |
1552 | ||
4c698046 | 1553 | static void mroute_clean_tables(struct mr6_table *mrt, bool all) |
7bc570c8 YH |
1554 | { |
1555 | int i; | |
c871e664 | 1556 | LIST_HEAD(list); |
f30a7784 | 1557 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1558 | |
1559 | /* | |
1560 | * Shut down all active vif entries | |
1561 | */ | |
6bd52143 | 1562 | for (i = 0; i < mrt->maxvif; i++) { |
4c698046 NA |
1563 | if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) |
1564 | continue; | |
723b929c | 1565 | mif6_delete(mrt, i, 0, &list); |
7bc570c8 | 1566 | } |
c871e664 | 1567 | unregister_netdevice_many(&list); |
7bc570c8 YH |
1568 | |
1569 | /* | |
1570 | * Wipe the cache | |
1571 | */ | |
4a6258a0 | 1572 | for (i = 0; i < MFC6_LINES; i++) { |
6bd52143 | 1573 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { |
4c698046 | 1574 | if (!all && (c->mfc_flags & MFC_STATIC)) |
7bc570c8 | 1575 | continue; |
7bc570c8 | 1576 | write_lock_bh(&mrt_lock); |
f30a7784 | 1577 | list_del(&c->list); |
7bc570c8 YH |
1578 | write_unlock_bh(&mrt_lock); |
1579 | ||
812e44dd | 1580 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1581 | ip6mr_cache_free(c); |
7bc570c8 YH |
1582 | } |
1583 | } | |
1584 | ||
6bd52143 | 1585 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
7bc570c8 | 1586 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1587 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
f30a7784 | 1588 | list_del(&c->list); |
812e44dd | 1589 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 1590 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
1591 | } |
1592 | spin_unlock_bh(&mfc_unres_lock); | |
1593 | } | |
1594 | } | |
1595 | ||
6bd52143 | 1596 | static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) |
7bc570c8 YH |
1597 | { |
1598 | int err = 0; | |
8229efda | 1599 | struct net *net = sock_net(sk); |
7bc570c8 YH |
1600 | |
1601 | rtnl_lock(); | |
1602 | write_lock_bh(&mrt_lock); | |
6bd52143 PM |
1603 | if (likely(mrt->mroute6_sk == NULL)) { |
1604 | mrt->mroute6_sk = sk; | |
1d6e55f1 | 1605 | net->ipv6.devconf_all->mc_forwarding++; |
927265bc | 1606 | } else { |
7bc570c8 | 1607 | err = -EADDRINUSE; |
927265bc | 1608 | } |
7bc570c8 YH |
1609 | write_unlock_bh(&mrt_lock); |
1610 | ||
927265bc | 1611 | if (!err) |
85b3daad DA |
1612 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1613 | NETCONFA_MC_FORWARDING, | |
927265bc ED |
1614 | NETCONFA_IFINDEX_ALL, |
1615 | net->ipv6.devconf_all); | |
7bc570c8 YH |
1616 | rtnl_unlock(); |
1617 | ||
1618 | return err; | |
1619 | } | |
1620 | ||
1621 | int ip6mr_sk_done(struct sock *sk) | |
1622 | { | |
d1db275d | 1623 | int err = -EACCES; |
8229efda | 1624 | struct net *net = sock_net(sk); |
d1db275d | 1625 | struct mr6_table *mrt; |
7bc570c8 | 1626 | |
338d182f FR |
1627 | if (sk->sk_type != SOCK_RAW || |
1628 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1629 | return err; | |
1630 | ||
7bc570c8 | 1631 | rtnl_lock(); |
d1db275d PM |
1632 | ip6mr_for_each_table(mrt, net) { |
1633 | if (sk == mrt->mroute6_sk) { | |
1634 | write_lock_bh(&mrt_lock); | |
1635 | mrt->mroute6_sk = NULL; | |
1636 | net->ipv6.devconf_all->mc_forwarding--; | |
927265bc | 1637 | write_unlock_bh(&mrt_lock); |
85b3daad | 1638 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
d67b8c61 ND |
1639 | NETCONFA_MC_FORWARDING, |
1640 | NETCONFA_IFINDEX_ALL, | |
1641 | net->ipv6.devconf_all); | |
7bc570c8 | 1642 | |
4c698046 | 1643 | mroute_clean_tables(mrt, false); |
d1db275d PM |
1644 | err = 0; |
1645 | break; | |
1646 | } | |
1647 | } | |
7bc570c8 YH |
1648 | rtnl_unlock(); |
1649 | ||
1650 | return err; | |
1651 | } | |
1652 | ||
d1db275d | 1653 | struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) |
6bd52143 | 1654 | { |
d1db275d | 1655 | struct mr6_table *mrt; |
4c9483b2 | 1656 | struct flowi6 fl6 = { |
e374c618 | 1657 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 DM |
1658 | .flowi6_oif = skb->dev->ifindex, |
1659 | .flowi6_mark = skb->mark, | |
d1db275d PM |
1660 | }; |
1661 | ||
4c9483b2 | 1662 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d | 1663 | return NULL; |
6bd52143 PM |
1664 | |
1665 | return mrt->mroute6_sk; | |
1666 | } | |
1667 | ||
7bc570c8 YH |
1668 | /* |
1669 | * Socket options and virtual interface manipulation. The whole | |
1670 | * virtual interface system is a complete heap, but unfortunately | |
1671 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1672 | * MOSPF/PIM router set up we can clean this up. | |
1673 | */ | |
1674 | ||
b7058842 | 1675 | int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
7bc570c8 | 1676 | { |
660b26dc | 1677 | int ret, parent = 0; |
7bc570c8 YH |
1678 | struct mif6ctl vif; |
1679 | struct mf6cctl mfc; | |
1680 | mifi_t mifi; | |
8229efda | 1681 | struct net *net = sock_net(sk); |
d1db275d PM |
1682 | struct mr6_table *mrt; |
1683 | ||
99253eb7 XL |
1684 | if (sk->sk_type != SOCK_RAW || |
1685 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1686 | return -EOPNOTSUPP; | |
1687 | ||
d1db275d | 1688 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
63159f29 | 1689 | if (!mrt) |
d1db275d | 1690 | return -ENOENT; |
7bc570c8 YH |
1691 | |
1692 | if (optname != MRT6_INIT) { | |
af31f412 | 1693 | if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
7bc570c8 YH |
1694 | return -EACCES; |
1695 | } | |
1696 | ||
1697 | switch (optname) { | |
1698 | case MRT6_INIT: | |
7bc570c8 YH |
1699 | if (optlen < sizeof(int)) |
1700 | return -EINVAL; | |
1701 | ||
6bd52143 | 1702 | return ip6mr_sk_init(mrt, sk); |
7bc570c8 YH |
1703 | |
1704 | case MRT6_DONE: | |
1705 | return ip6mr_sk_done(sk); | |
1706 | ||
1707 | case MRT6_ADD_MIF: | |
1708 | if (optlen < sizeof(vif)) | |
1709 | return -EINVAL; | |
1710 | if (copy_from_user(&vif, optval, sizeof(vif))) | |
1711 | return -EFAULT; | |
6ac7eb08 | 1712 | if (vif.mif6c_mifi >= MAXMIFS) |
7bc570c8 YH |
1713 | return -ENFILE; |
1714 | rtnl_lock(); | |
6bd52143 | 1715 | ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); |
7bc570c8 YH |
1716 | rtnl_unlock(); |
1717 | return ret; | |
1718 | ||
1719 | case MRT6_DEL_MIF: | |
1720 | if (optlen < sizeof(mifi_t)) | |
1721 | return -EINVAL; | |
1722 | if (copy_from_user(&mifi, optval, sizeof(mifi_t))) | |
1723 | return -EFAULT; | |
1724 | rtnl_lock(); | |
723b929c | 1725 | ret = mif6_delete(mrt, mifi, 0, NULL); |
7bc570c8 YH |
1726 | rtnl_unlock(); |
1727 | return ret; | |
1728 | ||
1729 | /* | |
1730 | * Manipulate the forwarding caches. These live | |
1731 | * in a sort of kernel/user symbiosis. | |
1732 | */ | |
1733 | case MRT6_ADD_MFC: | |
1734 | case MRT6_DEL_MFC: | |
660b26dc | 1735 | parent = -1; |
275757e6 | 1736 | /* fall through */ |
660b26dc ND |
1737 | case MRT6_ADD_MFC_PROXY: |
1738 | case MRT6_DEL_MFC_PROXY: | |
7bc570c8 YH |
1739 | if (optlen < sizeof(mfc)) |
1740 | return -EINVAL; | |
1741 | if (copy_from_user(&mfc, optval, sizeof(mfc))) | |
1742 | return -EFAULT; | |
660b26dc ND |
1743 | if (parent == 0) |
1744 | parent = mfc.mf6cc_parent; | |
7bc570c8 | 1745 | rtnl_lock(); |
660b26dc ND |
1746 | if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) |
1747 | ret = ip6mr_mfc_delete(mrt, &mfc, parent); | |
7bc570c8 | 1748 | else |
660b26dc ND |
1749 | ret = ip6mr_mfc_add(net, mrt, &mfc, |
1750 | sk == mrt->mroute6_sk, parent); | |
7bc570c8 YH |
1751 | rtnl_unlock(); |
1752 | return ret; | |
1753 | ||
14fb64e1 YH |
1754 | /* |
1755 | * Control PIM assert (to activate pim will activate assert) | |
1756 | */ | |
1757 | case MRT6_ASSERT: | |
1758 | { | |
1759 | int v; | |
03f52a0a JP |
1760 | |
1761 | if (optlen != sizeof(v)) | |
1762 | return -EINVAL; | |
14fb64e1 YH |
1763 | if (get_user(v, (int __user *)optval)) |
1764 | return -EFAULT; | |
53d6841d | 1765 | mrt->mroute_do_assert = v; |
14fb64e1 YH |
1766 | return 0; |
1767 | } | |
1768 | ||
1769 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1770 | case MRT6_PIM: | |
1771 | { | |
a9f83bf3 | 1772 | int v; |
03f52a0a JP |
1773 | |
1774 | if (optlen != sizeof(v)) | |
1775 | return -EINVAL; | |
14fb64e1 YH |
1776 | if (get_user(v, (int __user *)optval)) |
1777 | return -EFAULT; | |
1778 | v = !!v; | |
1779 | rtnl_lock(); | |
1780 | ret = 0; | |
6bd52143 PM |
1781 | if (v != mrt->mroute_do_pim) { |
1782 | mrt->mroute_do_pim = v; | |
1783 | mrt->mroute_do_assert = v; | |
14fb64e1 YH |
1784 | } |
1785 | rtnl_unlock(); | |
1786 | return ret; | |
1787 | } | |
1788 | ||
d1db275d PM |
1789 | #endif |
1790 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
1791 | case MRT6_TABLE: | |
1792 | { | |
1793 | u32 v; | |
1794 | ||
1795 | if (optlen != sizeof(u32)) | |
1796 | return -EINVAL; | |
1797 | if (get_user(v, (u32 __user *)optval)) | |
1798 | return -EFAULT; | |
75356a81 DC |
1799 | /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
1800 | if (v != RT_TABLE_DEFAULT && v >= 100000000) | |
1801 | return -EINVAL; | |
d1db275d PM |
1802 | if (sk == mrt->mroute6_sk) |
1803 | return -EBUSY; | |
1804 | ||
1805 | rtnl_lock(); | |
1806 | ret = 0; | |
1807 | if (!ip6mr_new_table(net, v)) | |
1808 | ret = -ENOMEM; | |
4861f799 SD |
1809 | else |
1810 | raw6_sk(sk)->ip6mr_table = v; | |
d1db275d PM |
1811 | rtnl_unlock(); |
1812 | return ret; | |
1813 | } | |
14fb64e1 | 1814 | #endif |
7bc570c8 | 1815 | /* |
7d120c55 | 1816 | * Spurious command, or MRT6_VERSION which you cannot |
7bc570c8 YH |
1817 | * set. |
1818 | */ | |
1819 | default: | |
1820 | return -ENOPROTOOPT; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * Getsock opt support for the multicast routing system. | |
1826 | */ | |
1827 | ||
1828 | int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, | |
1829 | int __user *optlen) | |
1830 | { | |
1831 | int olr; | |
1832 | int val; | |
8229efda | 1833 | struct net *net = sock_net(sk); |
d1db275d PM |
1834 | struct mr6_table *mrt; |
1835 | ||
99253eb7 XL |
1836 | if (sk->sk_type != SOCK_RAW || |
1837 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1838 | return -EOPNOTSUPP; | |
1839 | ||
d1db275d | 1840 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
63159f29 | 1841 | if (!mrt) |
d1db275d | 1842 | return -ENOENT; |
7bc570c8 YH |
1843 | |
1844 | switch (optname) { | |
1845 | case MRT6_VERSION: | |
1846 | val = 0x0305; | |
1847 | break; | |
14fb64e1 YH |
1848 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1849 | case MRT6_PIM: | |
6bd52143 | 1850 | val = mrt->mroute_do_pim; |
14fb64e1 YH |
1851 | break; |
1852 | #endif | |
1853 | case MRT6_ASSERT: | |
6bd52143 | 1854 | val = mrt->mroute_do_assert; |
14fb64e1 | 1855 | break; |
7bc570c8 YH |
1856 | default: |
1857 | return -ENOPROTOOPT; | |
1858 | } | |
1859 | ||
1860 | if (get_user(olr, optlen)) | |
1861 | return -EFAULT; | |
1862 | ||
1863 | olr = min_t(int, olr, sizeof(int)); | |
1864 | if (olr < 0) | |
1865 | return -EINVAL; | |
1866 | ||
1867 | if (put_user(olr, optlen)) | |
1868 | return -EFAULT; | |
1869 | if (copy_to_user(optval, &val, olr)) | |
1870 | return -EFAULT; | |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | /* | |
1875 | * The IP multicast ioctl support routines. | |
1876 | */ | |
1877 | ||
1878 | int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) | |
1879 | { | |
1880 | struct sioc_sg_req6 sr; | |
1881 | struct sioc_mif_req6 vr; | |
1882 | struct mif_device *vif; | |
1883 | struct mfc6_cache *c; | |
8229efda | 1884 | struct net *net = sock_net(sk); |
d1db275d PM |
1885 | struct mr6_table *mrt; |
1886 | ||
1887 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1888 | if (!mrt) |
d1db275d | 1889 | return -ENOENT; |
7bc570c8 YH |
1890 | |
1891 | switch (cmd) { | |
1892 | case SIOCGETMIFCNT_IN6: | |
1893 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1894 | return -EFAULT; | |
6bd52143 | 1895 | if (vr.mifi >= mrt->maxvif) |
7bc570c8 | 1896 | return -EINVAL; |
215c81c4 | 1897 | vr.mifi = array_index_nospec(vr.mifi, mrt->maxvif); |
7bc570c8 | 1898 | read_lock(&mrt_lock); |
6bd52143 PM |
1899 | vif = &mrt->vif6_table[vr.mifi]; |
1900 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
7bc570c8 YH |
1901 | vr.icount = vif->pkt_in; |
1902 | vr.ocount = vif->pkt_out; | |
1903 | vr.ibytes = vif->bytes_in; | |
1904 | vr.obytes = vif->bytes_out; | |
1905 | read_unlock(&mrt_lock); | |
1906 | ||
1907 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1908 | return -EFAULT; | |
1909 | return 0; | |
1910 | } | |
1911 | read_unlock(&mrt_lock); | |
1912 | return -EADDRNOTAVAIL; | |
1913 | case SIOCGETSGCNT_IN6: | |
1914 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1915 | return -EFAULT; | |
1916 | ||
1917 | read_lock(&mrt_lock); | |
6bd52143 | 1918 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
7bc570c8 YH |
1919 | if (c) { |
1920 | sr.pktcnt = c->mfc_un.res.pkt; | |
1921 | sr.bytecnt = c->mfc_un.res.bytes; | |
1922 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1923 | read_unlock(&mrt_lock); | |
1924 | ||
1925 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1926 | return -EFAULT; | |
1927 | return 0; | |
1928 | } | |
1929 | read_unlock(&mrt_lock); | |
1930 | return -EADDRNOTAVAIL; | |
1931 | default: | |
1932 | return -ENOIOCTLCMD; | |
1933 | } | |
1934 | } | |
1935 | ||
e2d57766 DM |
1936 | #ifdef CONFIG_COMPAT |
1937 | struct compat_sioc_sg_req6 { | |
1938 | struct sockaddr_in6 src; | |
1939 | struct sockaddr_in6 grp; | |
1940 | compat_ulong_t pktcnt; | |
1941 | compat_ulong_t bytecnt; | |
1942 | compat_ulong_t wrong_if; | |
1943 | }; | |
1944 | ||
1945 | struct compat_sioc_mif_req6 { | |
1946 | mifi_t mifi; | |
1947 | compat_ulong_t icount; | |
1948 | compat_ulong_t ocount; | |
1949 | compat_ulong_t ibytes; | |
1950 | compat_ulong_t obytes; | |
1951 | }; | |
1952 | ||
1953 | int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) | |
1954 | { | |
1955 | struct compat_sioc_sg_req6 sr; | |
1956 | struct compat_sioc_mif_req6 vr; | |
1957 | struct mif_device *vif; | |
1958 | struct mfc6_cache *c; | |
1959 | struct net *net = sock_net(sk); | |
1960 | struct mr6_table *mrt; | |
1961 | ||
1962 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1963 | if (!mrt) |
e2d57766 DM |
1964 | return -ENOENT; |
1965 | ||
1966 | switch (cmd) { | |
1967 | case SIOCGETMIFCNT_IN6: | |
1968 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1969 | return -EFAULT; | |
1970 | if (vr.mifi >= mrt->maxvif) | |
1971 | return -EINVAL; | |
215c81c4 | 1972 | vr.mifi = array_index_nospec(vr.mifi, mrt->maxvif); |
e2d57766 DM |
1973 | read_lock(&mrt_lock); |
1974 | vif = &mrt->vif6_table[vr.mifi]; | |
1975 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
1976 | vr.icount = vif->pkt_in; | |
1977 | vr.ocount = vif->pkt_out; | |
1978 | vr.ibytes = vif->bytes_in; | |
1979 | vr.obytes = vif->bytes_out; | |
1980 | read_unlock(&mrt_lock); | |
1981 | ||
1982 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1983 | return -EFAULT; | |
1984 | return 0; | |
1985 | } | |
1986 | read_unlock(&mrt_lock); | |
1987 | return -EADDRNOTAVAIL; | |
1988 | case SIOCGETSGCNT_IN6: | |
1989 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1990 | return -EFAULT; | |
1991 | ||
1992 | read_lock(&mrt_lock); | |
1993 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); | |
1994 | if (c) { | |
1995 | sr.pktcnt = c->mfc_un.res.pkt; | |
1996 | sr.bytecnt = c->mfc_un.res.bytes; | |
1997 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1998 | read_unlock(&mrt_lock); | |
1999 | ||
2000 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
2001 | return -EFAULT; | |
2002 | return 0; | |
2003 | } | |
2004 | read_unlock(&mrt_lock); | |
2005 | return -EADDRNOTAVAIL; | |
2006 | default: | |
2007 | return -ENOIOCTLCMD; | |
2008 | } | |
2009 | } | |
2010 | #endif | |
7bc570c8 | 2011 | |
0c4b51f0 | 2012 | static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb) |
7bc570c8 | 2013 | { |
d8cfe110 IS |
2014 | IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), |
2015 | IPSTATS_MIB_OUTFORWDATAGRAMS); | |
2016 | IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)), | |
2017 | IPSTATS_MIB_OUTOCTETS, skb->len); | |
13206b6b | 2018 | return dst_output(net, sk, skb); |
7bc570c8 YH |
2019 | } |
2020 | ||
2021 | /* | |
2022 | * Processing handlers for ip6mr_forward | |
2023 | */ | |
2024 | ||
6bd52143 PM |
2025 | static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, |
2026 | struct sk_buff *skb, struct mfc6_cache *c, int vifi) | |
7bc570c8 YH |
2027 | { |
2028 | struct ipv6hdr *ipv6h; | |
6bd52143 | 2029 | struct mif_device *vif = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
2030 | struct net_device *dev; |
2031 | struct dst_entry *dst; | |
4c9483b2 | 2032 | struct flowi6 fl6; |
7bc570c8 | 2033 | |
63159f29 | 2034 | if (!vif->dev) |
7bc570c8 YH |
2035 | goto out_free; |
2036 | ||
14fb64e1 YH |
2037 | #ifdef CONFIG_IPV6_PIMSM_V2 |
2038 | if (vif->flags & MIFF_REGISTER) { | |
2039 | vif->pkt_out++; | |
2040 | vif->bytes_out += skb->len; | |
dc58c78c PE |
2041 | vif->dev->stats.tx_bytes += skb->len; |
2042 | vif->dev->stats.tx_packets++; | |
6bd52143 | 2043 | ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); |
8da73b73 | 2044 | goto out_free; |
14fb64e1 YH |
2045 | } |
2046 | #endif | |
2047 | ||
7bc570c8 YH |
2048 | ipv6h = ipv6_hdr(skb); |
2049 | ||
4c9483b2 DM |
2050 | fl6 = (struct flowi6) { |
2051 | .flowi6_oif = vif->link, | |
2052 | .daddr = ipv6h->daddr, | |
7bc570c8 YH |
2053 | }; |
2054 | ||
4c9483b2 | 2055 | dst = ip6_route_output(net, NULL, &fl6); |
5095d64d RL |
2056 | if (dst->error) { |
2057 | dst_release(dst); | |
7bc570c8 | 2058 | goto out_free; |
5095d64d | 2059 | } |
7bc570c8 | 2060 | |
adf30907 ED |
2061 | skb_dst_drop(skb); |
2062 | skb_dst_set(skb, dst); | |
7bc570c8 YH |
2063 | |
2064 | /* | |
2065 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally | |
2066 | * not only before forwarding, but after forwarding on all output | |
2067 | * interfaces. It is clear, if mrouter runs a multicasting | |
2068 | * program, it should receive packets not depending to what interface | |
2069 | * program is joined. | |
2070 | * If we will not make it, the program will have to join on all | |
2071 | * interfaces. On the other hand, multihoming host (or router, but | |
2072 | * not mrouter) cannot join to more than one interface - it will | |
2073 | * result in receiving multiple packets. | |
2074 | */ | |
2075 | dev = vif->dev; | |
2076 | skb->dev = dev; | |
2077 | vif->pkt_out++; | |
2078 | vif->bytes_out += skb->len; | |
2079 | ||
2080 | /* We are about to write */ | |
2081 | /* XXX: extension headers? */ | |
2082 | if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) | |
2083 | goto out_free; | |
2084 | ||
2085 | ipv6h = ipv6_hdr(skb); | |
2086 | ipv6h->hop_limit--; | |
2087 | ||
2088 | IP6CB(skb)->flags |= IP6SKB_FORWARDED; | |
2089 | ||
29a26a56 EB |
2090 | return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, |
2091 | net, NULL, skb, skb->dev, dev, | |
7bc570c8 YH |
2092 | ip6mr_forward2_finish); |
2093 | ||
2094 | out_free: | |
2095 | kfree_skb(skb); | |
2096 | return 0; | |
2097 | } | |
2098 | ||
6bd52143 | 2099 | static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) |
7bc570c8 YH |
2100 | { |
2101 | int ct; | |
6bd52143 PM |
2102 | |
2103 | for (ct = mrt->maxvif - 1; ct >= 0; ct--) { | |
2104 | if (mrt->vif6_table[ct].dev == dev) | |
7bc570c8 YH |
2105 | break; |
2106 | } | |
2107 | return ct; | |
2108 | } | |
2109 | ||
2b52c3ad RR |
2110 | static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
2111 | struct sk_buff *skb, struct mfc6_cache *cache) | |
7bc570c8 YH |
2112 | { |
2113 | int psend = -1; | |
2114 | int vif, ct; | |
660b26dc | 2115 | int true_vifi = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 YH |
2116 | |
2117 | vif = cache->mf6c_parent; | |
2118 | cache->mfc_un.res.pkt++; | |
2119 | cache->mfc_un.res.bytes += skb->len; | |
43b9e127 | 2120 | cache->mfc_un.res.lastuse = jiffies; |
7bc570c8 | 2121 | |
660b26dc ND |
2122 | if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { |
2123 | struct mfc6_cache *cache_proxy; | |
2124 | ||
40dc2ca3 | 2125 | /* For an (*,G) entry, we only check that the incoming |
660b26dc ND |
2126 | * interface is part of the static tree. |
2127 | */ | |
2128 | cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); | |
2129 | if (cache_proxy && | |
2130 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2131 | goto forward; | |
2132 | } | |
2133 | ||
14fb64e1 YH |
2134 | /* |
2135 | * Wrong interface: drop packet and (maybe) send PIM assert. | |
2136 | */ | |
6bd52143 | 2137 | if (mrt->vif6_table[vif].dev != skb->dev) { |
14fb64e1 | 2138 | cache->mfc_un.res.wrong_if++; |
14fb64e1 | 2139 | |
6bd52143 | 2140 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
14fb64e1 YH |
2141 | /* pimsm uses asserts, when switching from RPT to SPT, |
2142 | so that we cannot check that packet arrived on an oif. | |
2143 | It is bad, but otherwise we would need to move pretty | |
2144 | large chunk of pimd to kernel. Ough... --ANK | |
2145 | */ | |
6bd52143 | 2146 | (mrt->mroute_do_pim || |
a21f3f99 | 2147 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
14fb64e1 YH |
2148 | time_after(jiffies, |
2149 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { | |
2150 | cache->mfc_un.res.last_assert = jiffies; | |
6bd52143 | 2151 | ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); |
14fb64e1 YH |
2152 | } |
2153 | goto dont_forward; | |
2154 | } | |
2155 | ||
660b26dc | 2156 | forward: |
6bd52143 PM |
2157 | mrt->vif6_table[vif].pkt_in++; |
2158 | mrt->vif6_table[vif].bytes_in += skb->len; | |
7bc570c8 YH |
2159 | |
2160 | /* | |
2161 | * Forward the frame | |
2162 | */ | |
660b26dc ND |
2163 | if (ipv6_addr_any(&cache->mf6c_origin) && |
2164 | ipv6_addr_any(&cache->mf6c_mcastgrp)) { | |
2165 | if (true_vifi >= 0 && | |
2166 | true_vifi != cache->mf6c_parent && | |
2167 | ipv6_hdr(skb)->hop_limit > | |
2168 | cache->mfc_un.res.ttls[cache->mf6c_parent]) { | |
2169 | /* It's an (*,*) entry and the packet is not coming from | |
2170 | * the upstream: forward the packet to the upstream | |
2171 | * only. | |
2172 | */ | |
2173 | psend = cache->mf6c_parent; | |
2174 | goto last_forward; | |
2175 | } | |
2176 | goto dont_forward; | |
2177 | } | |
7bc570c8 | 2178 | for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { |
660b26dc ND |
2179 | /* For (*,G) entry, don't forward to the incoming interface */ |
2180 | if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && | |
2181 | ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { | |
7bc570c8 YH |
2182 | if (psend != -1) { |
2183 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2184 | if (skb2) | |
6bd52143 | 2185 | ip6mr_forward2(net, mrt, skb2, cache, psend); |
7bc570c8 YH |
2186 | } |
2187 | psend = ct; | |
2188 | } | |
2189 | } | |
660b26dc | 2190 | last_forward: |
7bc570c8 | 2191 | if (psend != -1) { |
6bd52143 | 2192 | ip6mr_forward2(net, mrt, skb, cache, psend); |
2b52c3ad | 2193 | return; |
7bc570c8 YH |
2194 | } |
2195 | ||
14fb64e1 | 2196 | dont_forward: |
7bc570c8 | 2197 | kfree_skb(skb); |
7bc570c8 YH |
2198 | } |
2199 | ||
2200 | ||
2201 | /* | |
2202 | * Multicast packets for forwarding arrive here | |
2203 | */ | |
2204 | ||
2205 | int ip6_mr_input(struct sk_buff *skb) | |
2206 | { | |
2207 | struct mfc6_cache *cache; | |
8229efda | 2208 | struct net *net = dev_net(skb->dev); |
d1db275d | 2209 | struct mr6_table *mrt; |
4c9483b2 DM |
2210 | struct flowi6 fl6 = { |
2211 | .flowi6_iif = skb->dev->ifindex, | |
2212 | .flowi6_mark = skb->mark, | |
d1db275d PM |
2213 | }; |
2214 | int err; | |
2215 | ||
4c9483b2 | 2216 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
2015de5f BG |
2217 | if (err < 0) { |
2218 | kfree_skb(skb); | |
d1db275d | 2219 | return err; |
2015de5f | 2220 | } |
7bc570c8 YH |
2221 | |
2222 | read_lock(&mrt_lock); | |
6bd52143 | 2223 | cache = ip6mr_cache_find(mrt, |
8229efda | 2224 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
63159f29 | 2225 | if (!cache) { |
660b26dc ND |
2226 | int vif = ip6mr_find_vif(mrt, skb->dev); |
2227 | ||
2228 | if (vif >= 0) | |
2229 | cache = ip6mr_cache_find_any(mrt, | |
2230 | &ipv6_hdr(skb)->daddr, | |
2231 | vif); | |
2232 | } | |
7bc570c8 YH |
2233 | |
2234 | /* | |
2235 | * No usable cache entry | |
2236 | */ | |
63159f29 | 2237 | if (!cache) { |
7bc570c8 YH |
2238 | int vif; |
2239 | ||
6bd52143 | 2240 | vif = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 | 2241 | if (vif >= 0) { |
6bd52143 | 2242 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
7bc570c8 YH |
2243 | read_unlock(&mrt_lock); |
2244 | ||
2245 | return err; | |
2246 | } | |
2247 | read_unlock(&mrt_lock); | |
2248 | kfree_skb(skb); | |
2249 | return -ENODEV; | |
2250 | } | |
2251 | ||
6bd52143 | 2252 | ip6_mr_forward(net, mrt, skb, cache); |
7bc570c8 YH |
2253 | |
2254 | read_unlock(&mrt_lock); | |
2255 | ||
2256 | return 0; | |
2257 | } | |
2258 | ||
2259 | ||
5b285cac PM |
2260 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
2261 | struct mfc6_cache *c, struct rtmsg *rtm) | |
7bc570c8 | 2262 | { |
adfa85e4 | 2263 | struct rta_mfc_stats mfcs; |
43b9e127 NA |
2264 | struct nlattr *mp_attr; |
2265 | struct rtnexthop *nhp; | |
b5036cd4 | 2266 | unsigned long lastuse; |
43b9e127 | 2267 | int ct; |
7bc570c8 | 2268 | |
7438189b | 2269 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
1708ebc9 NA |
2270 | if (c->mf6c_parent >= MAXMIFS) { |
2271 | rtm->rtm_flags |= RTNH_F_UNRESOLVED; | |
7438189b | 2272 | return -ENOENT; |
1708ebc9 | 2273 | } |
7438189b | 2274 | |
74a0bd7d TG |
2275 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
2276 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) | |
2277 | return -EMSGSIZE; | |
70b386a0 | 2278 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
63159f29 | 2279 | if (!mp_attr) |
70b386a0 | 2280 | return -EMSGSIZE; |
7bc570c8 YH |
2281 | |
2282 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
6bd52143 | 2283 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
70b386a0 | 2284 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
63159f29 | 2285 | if (!nhp) { |
70b386a0 ND |
2286 | nla_nest_cancel(skb, mp_attr); |
2287 | return -EMSGSIZE; | |
2288 | } | |
2289 | ||
7bc570c8 YH |
2290 | nhp->rtnh_flags = 0; |
2291 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
6bd52143 | 2292 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
7bc570c8 YH |
2293 | nhp->rtnh_len = sizeof(*nhp); |
2294 | } | |
2295 | } | |
70b386a0 ND |
2296 | |
2297 | nla_nest_end(skb, mp_attr); | |
2298 | ||
b5036cd4 NA |
2299 | lastuse = READ_ONCE(c->mfc_un.res.lastuse); |
2300 | lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0; | |
2301 | ||
adfa85e4 ND |
2302 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2303 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2304 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
43b9e127 | 2305 | if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) || |
b5036cd4 | 2306 | nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse), |
43b9e127 | 2307 | RTA_PAD)) |
adfa85e4 ND |
2308 | return -EMSGSIZE; |
2309 | ||
7bc570c8 YH |
2310 | rtm->rtm_type = RTN_MULTICAST; |
2311 | return 1; | |
7bc570c8 YH |
2312 | } |
2313 | ||
2cf75070 | 2314 | int ip6mr_get_route(struct net *net, struct sk_buff *skb, struct rtmsg *rtm, |
fd61c6ba | 2315 | u32 portid) |
7bc570c8 YH |
2316 | { |
2317 | int err; | |
d1db275d | 2318 | struct mr6_table *mrt; |
7bc570c8 | 2319 | struct mfc6_cache *cache; |
adf30907 | 2320 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
7bc570c8 | 2321 | |
d1db275d | 2322 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 2323 | if (!mrt) |
d1db275d PM |
2324 | return -ENOENT; |
2325 | ||
7bc570c8 | 2326 | read_lock(&mrt_lock); |
6bd52143 | 2327 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
660b26dc ND |
2328 | if (!cache && skb->dev) { |
2329 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2330 | ||
2331 | if (vif >= 0) | |
2332 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, | |
2333 | vif); | |
2334 | } | |
7bc570c8 YH |
2335 | |
2336 | if (!cache) { | |
2337 | struct sk_buff *skb2; | |
2338 | struct ipv6hdr *iph; | |
2339 | struct net_device *dev; | |
2340 | int vif; | |
2341 | ||
7bc570c8 | 2342 | dev = skb->dev; |
63159f29 | 2343 | if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
7bc570c8 YH |
2344 | read_unlock(&mrt_lock); |
2345 | return -ENODEV; | |
2346 | } | |
2347 | ||
2348 | /* really correct? */ | |
2349 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
2350 | if (!skb2) { | |
2351 | read_unlock(&mrt_lock); | |
2352 | return -ENOMEM; | |
2353 | } | |
2354 | ||
2cf75070 | 2355 | NETLINK_CB(skb2).portid = portid; |
7bc570c8 YH |
2356 | skb_reset_transport_header(skb2); |
2357 | ||
2358 | skb_put(skb2, sizeof(struct ipv6hdr)); | |
2359 | skb_reset_network_header(skb2); | |
2360 | ||
2361 | iph = ipv6_hdr(skb2); | |
2362 | iph->version = 0; | |
2363 | iph->priority = 0; | |
2364 | iph->flow_lbl[0] = 0; | |
2365 | iph->flow_lbl[1] = 0; | |
2366 | iph->flow_lbl[2] = 0; | |
2367 | iph->payload_len = 0; | |
2368 | iph->nexthdr = IPPROTO_NONE; | |
2369 | iph->hop_limit = 0; | |
4e3fd7a0 AD |
2370 | iph->saddr = rt->rt6i_src.addr; |
2371 | iph->daddr = rt->rt6i_dst.addr; | |
7bc570c8 | 2372 | |
6bd52143 | 2373 | err = ip6mr_cache_unresolved(mrt, vif, skb2); |
7bc570c8 YH |
2374 | read_unlock(&mrt_lock); |
2375 | ||
2376 | return err; | |
2377 | } | |
2378 | ||
fd61c6ba | 2379 | if (rtm->rtm_flags & RTM_F_NOTIFY) |
7bc570c8 YH |
2380 | cache->mfc_flags |= MFC_NOTIFY; |
2381 | ||
5b285cac | 2382 | err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); |
7bc570c8 YH |
2383 | read_unlock(&mrt_lock); |
2384 | return err; | |
2385 | } | |
2386 | ||
5b285cac | 2387 | static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
f518338b ND |
2388 | u32 portid, u32 seq, struct mfc6_cache *c, int cmd, |
2389 | int flags) | |
5b285cac PM |
2390 | { |
2391 | struct nlmsghdr *nlh; | |
2392 | struct rtmsg *rtm; | |
1eb99af5 | 2393 | int err; |
5b285cac | 2394 | |
f518338b | 2395 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
63159f29 | 2396 | if (!nlh) |
5b285cac PM |
2397 | return -EMSGSIZE; |
2398 | ||
2399 | rtm = nlmsg_data(nlh); | |
193c1e47 | 2400 | rtm->rtm_family = RTNL_FAMILY_IP6MR; |
5b285cac PM |
2401 | rtm->rtm_dst_len = 128; |
2402 | rtm->rtm_src_len = 128; | |
2403 | rtm->rtm_tos = 0; | |
2404 | rtm->rtm_table = mrt->id; | |
c78679e8 DM |
2405 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2406 | goto nla_put_failure; | |
1eb99af5 | 2407 | rtm->rtm_type = RTN_MULTICAST; |
5b285cac | 2408 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
9a68ac72 ND |
2409 | if (c->mfc_flags & MFC_STATIC) |
2410 | rtm->rtm_protocol = RTPROT_STATIC; | |
2411 | else | |
2412 | rtm->rtm_protocol = RTPROT_MROUTED; | |
5b285cac PM |
2413 | rtm->rtm_flags = 0; |
2414 | ||
930345ea JB |
2415 | if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) || |
2416 | nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp)) | |
c78679e8 | 2417 | goto nla_put_failure; |
1eb99af5 ND |
2418 | err = __ip6mr_fill_mroute(mrt, skb, c, rtm); |
2419 | /* do not break the dump if cache is unresolved */ | |
2420 | if (err < 0 && err != -ENOENT) | |
5b285cac PM |
2421 | goto nla_put_failure; |
2422 | ||
053c095a JB |
2423 | nlmsg_end(skb, nlh); |
2424 | return 0; | |
5b285cac PM |
2425 | |
2426 | nla_put_failure: | |
2427 | nlmsg_cancel(skb, nlh); | |
2428 | return -EMSGSIZE; | |
2429 | } | |
2430 | ||
812e44dd ND |
2431 | static int mr6_msgsize(bool unresolved, int maxvif) |
2432 | { | |
2433 | size_t len = | |
2434 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2435 | + nla_total_size(4) /* RTA_TABLE */ | |
2436 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ | |
2437 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ | |
2438 | ; | |
2439 | ||
2440 | if (!unresolved) | |
2441 | len = len | |
2442 | + nla_total_size(4) /* RTA_IIF */ | |
2443 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2444 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2445 | /* RTA_MFC_STATS */ | |
3d6b66c1 | 2446 | + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) |
812e44dd ND |
2447 | ; |
2448 | ||
2449 | return len; | |
2450 | } | |
2451 | ||
2452 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, | |
2453 | int cmd) | |
2454 | { | |
2455 | struct net *net = read_pnet(&mrt->net); | |
2456 | struct sk_buff *skb; | |
2457 | int err = -ENOBUFS; | |
2458 | ||
2459 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), | |
2460 | GFP_ATOMIC); | |
63159f29 | 2461 | if (!skb) |
812e44dd ND |
2462 | goto errout; |
2463 | ||
f518338b | 2464 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
812e44dd ND |
2465 | if (err < 0) |
2466 | goto errout; | |
2467 | ||
2468 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); | |
2469 | return; | |
2470 | ||
2471 | errout: | |
2472 | kfree_skb(skb); | |
2473 | if (err < 0) | |
2474 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); | |
2475 | } | |
2476 | ||
dd12d15c JG |
2477 | static size_t mrt6msg_netlink_msgsize(size_t payloadlen) |
2478 | { | |
2479 | size_t len = | |
2480 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) | |
2481 | + nla_total_size(1) /* IP6MRA_CREPORT_MSGTYPE */ | |
2482 | + nla_total_size(4) /* IP6MRA_CREPORT_MIF_ID */ | |
2483 | /* IP6MRA_CREPORT_SRC_ADDR */ | |
2484 | + nla_total_size(sizeof(struct in6_addr)) | |
2485 | /* IP6MRA_CREPORT_DST_ADDR */ | |
2486 | + nla_total_size(sizeof(struct in6_addr)) | |
2487 | /* IP6MRA_CREPORT_PKT */ | |
2488 | + nla_total_size(payloadlen) | |
2489 | ; | |
2490 | ||
2491 | return len; | |
2492 | } | |
2493 | ||
2494 | static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt) | |
2495 | { | |
2496 | struct net *net = read_pnet(&mrt->net); | |
2497 | struct nlmsghdr *nlh; | |
2498 | struct rtgenmsg *rtgenm; | |
2499 | struct mrt6msg *msg; | |
2500 | struct sk_buff *skb; | |
2501 | struct nlattr *nla; | |
2502 | int payloadlen; | |
2503 | ||
2504 | payloadlen = pkt->len - sizeof(struct mrt6msg); | |
2505 | msg = (struct mrt6msg *)skb_transport_header(pkt); | |
2506 | ||
2507 | skb = nlmsg_new(mrt6msg_netlink_msgsize(payloadlen), GFP_ATOMIC); | |
2508 | if (!skb) | |
2509 | goto errout; | |
2510 | ||
2511 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWCACHEREPORT, | |
2512 | sizeof(struct rtgenmsg), 0); | |
2513 | if (!nlh) | |
2514 | goto errout; | |
2515 | rtgenm = nlmsg_data(nlh); | |
2516 | rtgenm->rtgen_family = RTNL_FAMILY_IP6MR; | |
2517 | if (nla_put_u8(skb, IP6MRA_CREPORT_MSGTYPE, msg->im6_msgtype) || | |
2518 | nla_put_u32(skb, IP6MRA_CREPORT_MIF_ID, msg->im6_mif) || | |
2519 | nla_put_in6_addr(skb, IP6MRA_CREPORT_SRC_ADDR, | |
2520 | &msg->im6_src) || | |
2521 | nla_put_in6_addr(skb, IP6MRA_CREPORT_DST_ADDR, | |
2522 | &msg->im6_dst)) | |
2523 | goto nla_put_failure; | |
2524 | ||
2525 | nla = nla_reserve(skb, IP6MRA_CREPORT_PKT, payloadlen); | |
2526 | if (!nla || skb_copy_bits(pkt, sizeof(struct mrt6msg), | |
2527 | nla_data(nla), payloadlen)) | |
2528 | goto nla_put_failure; | |
2529 | ||
2530 | nlmsg_end(skb, nlh); | |
2531 | ||
2532 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE_R, NULL, GFP_ATOMIC); | |
2533 | return; | |
2534 | ||
2535 | nla_put_failure: | |
2536 | nlmsg_cancel(skb, nlh); | |
2537 | errout: | |
2538 | kfree_skb(skb); | |
2539 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE_R, -ENOBUFS); | |
2540 | } | |
2541 | ||
5b285cac PM |
2542 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2543 | { | |
2544 | struct net *net = sock_net(skb->sk); | |
2545 | struct mr6_table *mrt; | |
2546 | struct mfc6_cache *mfc; | |
2547 | unsigned int t = 0, s_t; | |
2548 | unsigned int h = 0, s_h; | |
2549 | unsigned int e = 0, s_e; | |
2550 | ||
2551 | s_t = cb->args[0]; | |
2552 | s_h = cb->args[1]; | |
2553 | s_e = cb->args[2]; | |
2554 | ||
2555 | read_lock(&mrt_lock); | |
2556 | ip6mr_for_each_table(mrt, net) { | |
2557 | if (t < s_t) | |
2558 | goto next_table; | |
2559 | if (t > s_t) | |
2560 | s_h = 0; | |
2561 | for (h = s_h; h < MFC6_LINES; h++) { | |
2562 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { | |
2563 | if (e < s_e) | |
2564 | goto next_entry; | |
2565 | if (ip6mr_fill_mroute(mrt, skb, | |
15e47304 | 2566 | NETLINK_CB(cb->skb).portid, |
5b285cac | 2567 | cb->nlh->nlmsg_seq, |
f518338b ND |
2568 | mfc, RTM_NEWROUTE, |
2569 | NLM_F_MULTI) < 0) | |
5b285cac PM |
2570 | goto done; |
2571 | next_entry: | |
2572 | e++; | |
2573 | } | |
2574 | e = s_e = 0; | |
2575 | } | |
1eb99af5 ND |
2576 | spin_lock_bh(&mfc_unres_lock); |
2577 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { | |
2578 | if (e < s_e) | |
2579 | goto next_entry2; | |
2580 | if (ip6mr_fill_mroute(mrt, skb, | |
2581 | NETLINK_CB(cb->skb).portid, | |
2582 | cb->nlh->nlmsg_seq, | |
f518338b ND |
2583 | mfc, RTM_NEWROUTE, |
2584 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2585 | spin_unlock_bh(&mfc_unres_lock); |
2586 | goto done; | |
2587 | } | |
2588 | next_entry2: | |
2589 | e++; | |
2590 | } | |
2591 | spin_unlock_bh(&mfc_unres_lock); | |
2592 | e = s_e = 0; | |
5b285cac PM |
2593 | s_h = 0; |
2594 | next_table: | |
2595 | t++; | |
2596 | } | |
2597 | done: | |
2598 | read_unlock(&mrt_lock); | |
2599 | ||
2600 | cb->args[2] = e; | |
2601 | cb->args[1] = h; | |
2602 | cb->args[0] = t; | |
2603 | ||
2604 | return skb->len; | |
2605 | } |