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Commit | Line | Data |
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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> |
7bc570c8 | 56 | |
6bd52143 | 57 | struct mr6_table { |
d1db275d | 58 | struct list_head list; |
0c5c9fb5 | 59 | possible_net_t net; |
d1db275d | 60 | u32 id; |
6bd52143 PM |
61 | struct sock *mroute6_sk; |
62 | struct timer_list ipmr_expire_timer; | |
63 | struct list_head mfc6_unres_queue; | |
64 | struct list_head mfc6_cache_array[MFC6_LINES]; | |
65 | struct mif_device vif6_table[MAXMIFS]; | |
66 | int maxvif; | |
67 | atomic_t cache_resolve_queue_len; | |
53d6841d JP |
68 | bool mroute_do_assert; |
69 | bool mroute_do_pim; | |
6bd52143 PM |
70 | #ifdef CONFIG_IPV6_PIMSM_V2 |
71 | int mroute_reg_vif_num; | |
72 | #endif | |
73 | }; | |
74 | ||
d1db275d PM |
75 | struct ip6mr_rule { |
76 | struct fib_rule common; | |
77 | }; | |
78 | ||
79 | struct ip6mr_result { | |
80 | struct mr6_table *mrt; | |
81 | }; | |
82 | ||
7bc570c8 YH |
83 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
84 | Note that the changes are semaphored via rtnl_lock. | |
85 | */ | |
86 | ||
87 | static DEFINE_RWLOCK(mrt_lock); | |
88 | ||
89 | /* | |
90 | * Multicast router control variables | |
91 | */ | |
92 | ||
6bd52143 | 93 | #define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL) |
7bc570c8 | 94 | |
7bc570c8 YH |
95 | /* Special spinlock for queue of unresolved entries */ |
96 | static DEFINE_SPINLOCK(mfc_unres_lock); | |
97 | ||
98 | /* We return to original Alan's scheme. Hash table of resolved | |
99 | entries is changed only in process context and protected | |
100 | with weak lock mrt_lock. Queue of unresolved entries is protected | |
101 | with strong spinlock mfc_unres_lock. | |
102 | ||
103 | In this case data path is free of exclusive locks at all. | |
104 | */ | |
105 | ||
106 | static struct kmem_cache *mrt_cachep __read_mostly; | |
107 | ||
d1db275d PM |
108 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id); |
109 | static void ip6mr_free_table(struct mr6_table *mrt); | |
110 | ||
2b52c3ad RR |
111 | static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
112 | struct sk_buff *skb, struct mfc6_cache *cache); | |
6bd52143 | 113 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
8229efda | 114 | mifi_t mifi, int assert); |
5b285cac PM |
115 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
116 | struct mfc6_cache *c, struct rtmsg *rtm); | |
812e44dd ND |
117 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, |
118 | int cmd); | |
dd12d15c | 119 | static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt); |
5b285cac PM |
120 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, |
121 | struct netlink_callback *cb); | |
4c698046 | 122 | static void mroute_clean_tables(struct mr6_table *mrt, bool all); |
e99e88a9 | 123 | static void ipmr_expire_process(struct timer_list *t); |
d1db275d PM |
124 | |
125 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
8ffb335e | 126 | #define ip6mr_for_each_table(mrt, net) \ |
d1db275d PM |
127 | list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) |
128 | ||
129 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
130 | { | |
131 | struct mr6_table *mrt; | |
132 | ||
133 | ip6mr_for_each_table(mrt, net) { | |
134 | if (mrt->id == id) | |
135 | return mrt; | |
136 | } | |
137 | return NULL; | |
138 | } | |
139 | ||
4c9483b2 | 140 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
141 | struct mr6_table **mrt) |
142 | { | |
d1db275d | 143 | int err; |
95f4a45d HFS |
144 | struct ip6mr_result res; |
145 | struct fib_lookup_arg arg = { | |
146 | .result = &res, | |
147 | .flags = FIB_LOOKUP_NOREF, | |
148 | }; | |
d1db275d | 149 | |
4c9483b2 DM |
150 | err = fib_rules_lookup(net->ipv6.mr6_rules_ops, |
151 | flowi6_to_flowi(flp6), 0, &arg); | |
d1db275d PM |
152 | if (err < 0) |
153 | return err; | |
154 | *mrt = res.mrt; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
159 | int flags, struct fib_lookup_arg *arg) | |
160 | { | |
161 | struct ip6mr_result *res = arg->result; | |
162 | struct mr6_table *mrt; | |
163 | ||
164 | switch (rule->action) { | |
165 | case FR_ACT_TO_TBL: | |
166 | break; | |
167 | case FR_ACT_UNREACHABLE: | |
168 | return -ENETUNREACH; | |
169 | case FR_ACT_PROHIBIT: | |
170 | return -EACCES; | |
171 | case FR_ACT_BLACKHOLE: | |
172 | default: | |
173 | return -EINVAL; | |
174 | } | |
175 | ||
176 | mrt = ip6mr_get_table(rule->fr_net, rule->table); | |
63159f29 | 177 | if (!mrt) |
d1db275d PM |
178 | return -EAGAIN; |
179 | res->mrt = mrt; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) | |
184 | { | |
185 | return 1; | |
186 | } | |
187 | ||
188 | static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { | |
189 | FRA_GENERIC_POLICY, | |
190 | }; | |
191 | ||
192 | static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
193 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
194 | { | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
199 | struct nlattr **tb) | |
200 | { | |
201 | return 1; | |
202 | } | |
203 | ||
204 | static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
205 | struct fib_rule_hdr *frh) | |
206 | { | |
207 | frh->dst_len = 0; | |
208 | frh->src_len = 0; | |
209 | frh->tos = 0; | |
210 | return 0; | |
211 | } | |
212 | ||
04a6f82c | 213 | static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { |
d1db275d PM |
214 | .family = RTNL_FAMILY_IP6MR, |
215 | .rule_size = sizeof(struct ip6mr_rule), | |
216 | .addr_size = sizeof(struct in6_addr), | |
217 | .action = ip6mr_rule_action, | |
218 | .match = ip6mr_rule_match, | |
219 | .configure = ip6mr_rule_configure, | |
220 | .compare = ip6mr_rule_compare, | |
d1db275d PM |
221 | .fill = ip6mr_rule_fill, |
222 | .nlgroup = RTNLGRP_IPV6_RULE, | |
223 | .policy = ip6mr_rule_policy, | |
224 | .owner = THIS_MODULE, | |
225 | }; | |
226 | ||
227 | static int __net_init ip6mr_rules_init(struct net *net) | |
228 | { | |
229 | struct fib_rules_ops *ops; | |
230 | struct mr6_table *mrt; | |
231 | int err; | |
232 | ||
233 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); | |
234 | if (IS_ERR(ops)) | |
235 | return PTR_ERR(ops); | |
236 | ||
237 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); | |
238 | ||
239 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
63159f29 | 240 | if (!mrt) { |
d1db275d PM |
241 | err = -ENOMEM; |
242 | goto err1; | |
243 | } | |
244 | ||
245 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); | |
246 | if (err < 0) | |
247 | goto err2; | |
248 | ||
249 | net->ipv6.mr6_rules_ops = ops; | |
250 | return 0; | |
251 | ||
252 | err2: | |
f243e5a7 | 253 | ip6mr_free_table(mrt); |
d1db275d PM |
254 | err1: |
255 | fib_rules_unregister(ops); | |
256 | return err; | |
257 | } | |
258 | ||
259 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
260 | { | |
261 | struct mr6_table *mrt, *next; | |
262 | ||
905a6f96 | 263 | rtnl_lock(); |
035320d5 ED |
264 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
265 | list_del(&mrt->list); | |
d1db275d | 266 | ip6mr_free_table(mrt); |
035320d5 | 267 | } |
d1db275d | 268 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
419df12f | 269 | rtnl_unlock(); |
d1db275d PM |
270 | } |
271 | #else | |
272 | #define ip6mr_for_each_table(mrt, net) \ | |
273 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) | |
274 | ||
275 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
276 | { | |
277 | return net->ipv6.mrt6; | |
278 | } | |
279 | ||
4c9483b2 | 280 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
281 | struct mr6_table **mrt) |
282 | { | |
283 | *mrt = net->ipv6.mrt6; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int __net_init ip6mr_rules_init(struct net *net) | |
288 | { | |
289 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
290 | return net->ipv6.mrt6 ? 0 : -ENOMEM; | |
291 | } | |
292 | ||
293 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
294 | { | |
905a6f96 | 295 | rtnl_lock(); |
d1db275d | 296 | ip6mr_free_table(net->ipv6.mrt6); |
905a6f96 HFS |
297 | net->ipv6.mrt6 = NULL; |
298 | rtnl_unlock(); | |
d1db275d PM |
299 | } |
300 | #endif | |
301 | ||
302 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) | |
303 | { | |
304 | struct mr6_table *mrt; | |
305 | unsigned int i; | |
306 | ||
307 | mrt = ip6mr_get_table(net, id); | |
53b24b8f | 308 | if (mrt) |
d1db275d PM |
309 | return mrt; |
310 | ||
311 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
63159f29 | 312 | if (!mrt) |
d1db275d PM |
313 | return NULL; |
314 | mrt->id = id; | |
315 | write_pnet(&mrt->net, net); | |
316 | ||
317 | /* Forwarding cache */ | |
318 | for (i = 0; i < MFC6_LINES; i++) | |
319 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); | |
320 | ||
321 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); | |
322 | ||
e99e88a9 | 323 | timer_setup(&mrt->ipmr_expire_timer, ipmr_expire_process, 0); |
d1db275d PM |
324 | |
325 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
326 | mrt->mroute_reg_vif_num = -1; | |
327 | #endif | |
328 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
329 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); | |
330 | #endif | |
331 | return mrt; | |
332 | } | |
7bc570c8 | 333 | |
d1db275d PM |
334 | static void ip6mr_free_table(struct mr6_table *mrt) |
335 | { | |
7ba0c47c | 336 | del_timer_sync(&mrt->ipmr_expire_timer); |
4c698046 | 337 | mroute_clean_tables(mrt, true); |
d1db275d PM |
338 | kfree(mrt); |
339 | } | |
7bc570c8 YH |
340 | |
341 | #ifdef CONFIG_PROC_FS | |
342 | ||
343 | struct ipmr_mfc_iter { | |
8b90fc7e | 344 | struct seq_net_private p; |
d1db275d | 345 | struct mr6_table *mrt; |
f30a7784 | 346 | struct list_head *cache; |
7bc570c8 YH |
347 | int ct; |
348 | }; | |
349 | ||
350 | ||
8b90fc7e BT |
351 | static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, |
352 | struct ipmr_mfc_iter *it, loff_t pos) | |
7bc570c8 | 353 | { |
d1db275d | 354 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
355 | struct mfc6_cache *mfc; |
356 | ||
7bc570c8 | 357 | read_lock(&mrt_lock); |
f30a7784 | 358 | for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { |
6bd52143 | 359 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 | 360 | list_for_each_entry(mfc, it->cache, list) |
7bc570c8 YH |
361 | if (pos-- == 0) |
362 | return mfc; | |
f30a7784 | 363 | } |
7bc570c8 YH |
364 | read_unlock(&mrt_lock); |
365 | ||
7bc570c8 | 366 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 367 | it->cache = &mrt->mfc6_unres_queue; |
f30a7784 | 368 | list_for_each_entry(mfc, it->cache, list) |
c476efbc | 369 | if (pos-- == 0) |
7bc570c8 YH |
370 | return mfc; |
371 | spin_unlock_bh(&mfc_unres_lock); | |
372 | ||
373 | it->cache = NULL; | |
374 | return NULL; | |
375 | } | |
376 | ||
7bc570c8 YH |
377 | /* |
378 | * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif | |
379 | */ | |
380 | ||
381 | struct ipmr_vif_iter { | |
8b90fc7e | 382 | struct seq_net_private p; |
d1db275d | 383 | struct mr6_table *mrt; |
7bc570c8 YH |
384 | int ct; |
385 | }; | |
386 | ||
8b90fc7e BT |
387 | static struct mif_device *ip6mr_vif_seq_idx(struct net *net, |
388 | struct ipmr_vif_iter *iter, | |
7bc570c8 YH |
389 | loff_t pos) |
390 | { | |
d1db275d | 391 | struct mr6_table *mrt = iter->mrt; |
6bd52143 PM |
392 | |
393 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
394 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 YH |
395 | continue; |
396 | if (pos-- == 0) | |
6bd52143 | 397 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
398 | } |
399 | return NULL; | |
400 | } | |
401 | ||
402 | static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
403 | __acquires(mrt_lock) | |
404 | { | |
d1db275d | 405 | struct ipmr_vif_iter *iter = seq->private; |
8b90fc7e | 406 | struct net *net = seq_file_net(seq); |
d1db275d PM |
407 | struct mr6_table *mrt; |
408 | ||
409 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); | |
63159f29 | 410 | if (!mrt) |
d1db275d PM |
411 | return ERR_PTR(-ENOENT); |
412 | ||
413 | iter->mrt = mrt; | |
8b90fc7e | 414 | |
7bc570c8 | 415 | read_lock(&mrt_lock); |
8b90fc7e BT |
416 | return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) |
417 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
418 | } |
419 | ||
420 | static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
421 | { | |
422 | struct ipmr_vif_iter *iter = seq->private; | |
8b90fc7e | 423 | struct net *net = seq_file_net(seq); |
d1db275d | 424 | struct mr6_table *mrt = iter->mrt; |
7bc570c8 YH |
425 | |
426 | ++*pos; | |
427 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 428 | return ip6mr_vif_seq_idx(net, iter, 0); |
7bc570c8 | 429 | |
6bd52143 PM |
430 | while (++iter->ct < mrt->maxvif) { |
431 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 | 432 | continue; |
6bd52143 | 433 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
434 | } |
435 | return NULL; | |
436 | } | |
437 | ||
438 | static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) | |
439 | __releases(mrt_lock) | |
440 | { | |
441 | read_unlock(&mrt_lock); | |
442 | } | |
443 | ||
444 | static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) | |
445 | { | |
d1db275d PM |
446 | struct ipmr_vif_iter *iter = seq->private; |
447 | struct mr6_table *mrt = iter->mrt; | |
8b90fc7e | 448 | |
7bc570c8 YH |
449 | if (v == SEQ_START_TOKEN) { |
450 | seq_puts(seq, | |
451 | "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); | |
452 | } else { | |
453 | const struct mif_device *vif = v; | |
454 | const char *name = vif->dev ? vif->dev->name : "none"; | |
455 | ||
456 | seq_printf(seq, | |
d430a227 | 457 | "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", |
6bd52143 | 458 | vif - mrt->vif6_table, |
7bc570c8 YH |
459 | name, vif->bytes_in, vif->pkt_in, |
460 | vif->bytes_out, vif->pkt_out, | |
461 | vif->flags); | |
462 | } | |
463 | return 0; | |
464 | } | |
465 | ||
98147d52 | 466 | static const struct seq_operations ip6mr_vif_seq_ops = { |
7bc570c8 YH |
467 | .start = ip6mr_vif_seq_start, |
468 | .next = ip6mr_vif_seq_next, | |
469 | .stop = ip6mr_vif_seq_stop, | |
470 | .show = ip6mr_vif_seq_show, | |
471 | }; | |
472 | ||
473 | static int ip6mr_vif_open(struct inode *inode, struct file *file) | |
474 | { | |
8b90fc7e BT |
475 | return seq_open_net(inode, file, &ip6mr_vif_seq_ops, |
476 | sizeof(struct ipmr_vif_iter)); | |
7bc570c8 YH |
477 | } |
478 | ||
5ca1b998 | 479 | static const struct file_operations ip6mr_vif_fops = { |
7bc570c8 YH |
480 | .owner = THIS_MODULE, |
481 | .open = ip6mr_vif_open, | |
482 | .read = seq_read, | |
483 | .llseek = seq_lseek, | |
8b90fc7e | 484 | .release = seq_release_net, |
7bc570c8 YH |
485 | }; |
486 | ||
487 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
488 | { | |
d1db275d | 489 | struct ipmr_mfc_iter *it = seq->private; |
8b90fc7e | 490 | struct net *net = seq_file_net(seq); |
d1db275d | 491 | struct mr6_table *mrt; |
8b90fc7e | 492 | |
d1db275d | 493 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 494 | if (!mrt) |
d1db275d PM |
495 | return ERR_PTR(-ENOENT); |
496 | ||
497 | it->mrt = mrt; | |
7c71a060 | 498 | it->cache = NULL; |
8b90fc7e BT |
499 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
500 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
501 | } |
502 | ||
503 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
504 | { | |
505 | struct mfc6_cache *mfc = v; | |
506 | struct ipmr_mfc_iter *it = seq->private; | |
8b90fc7e | 507 | struct net *net = seq_file_net(seq); |
d1db275d | 508 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
509 | |
510 | ++*pos; | |
511 | ||
512 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 513 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
7bc570c8 | 514 | |
f30a7784 PM |
515 | if (mfc->list.next != it->cache) |
516 | return list_entry(mfc->list.next, struct mfc6_cache, list); | |
7bc570c8 | 517 | |
6bd52143 | 518 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 YH |
519 | goto end_of_list; |
520 | ||
6bd52143 | 521 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
7bc570c8 | 522 | |
4a6258a0 | 523 | while (++it->ct < MFC6_LINES) { |
6bd52143 | 524 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 PM |
525 | if (list_empty(it->cache)) |
526 | continue; | |
527 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
528 | } |
529 | ||
530 | /* exhausted cache_array, show unresolved */ | |
531 | read_unlock(&mrt_lock); | |
6bd52143 | 532 | it->cache = &mrt->mfc6_unres_queue; |
7bc570c8 YH |
533 | it->ct = 0; |
534 | ||
535 | spin_lock_bh(&mfc_unres_lock); | |
f30a7784 PM |
536 | if (!list_empty(it->cache)) |
537 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
538 | |
539 | end_of_list: | |
540 | spin_unlock_bh(&mfc_unres_lock); | |
541 | it->cache = NULL; | |
542 | ||
543 | return NULL; | |
544 | } | |
545 | ||
546 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
547 | { | |
548 | struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 549 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 550 | |
6bd52143 | 551 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 | 552 | spin_unlock_bh(&mfc_unres_lock); |
25b4a44c | 553 | else if (it->cache == &mrt->mfc6_cache_array[it->ct]) |
7bc570c8 YH |
554 | read_unlock(&mrt_lock); |
555 | } | |
556 | ||
557 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
558 | { | |
559 | int n; | |
560 | ||
561 | if (v == SEQ_START_TOKEN) { | |
562 | seq_puts(seq, | |
563 | "Group " | |
564 | "Origin " | |
565 | "Iif Pkts Bytes Wrong Oifs\n"); | |
566 | } else { | |
567 | const struct mfc6_cache *mfc = v; | |
568 | const struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 569 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 570 | |
999890b2 | 571 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
0c6ce78a | 572 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
1ea472e2 | 573 | mfc->mf6c_parent); |
7bc570c8 | 574 | |
6bd52143 | 575 | if (it->cache != &mrt->mfc6_unres_queue) { |
1ea472e2 BT |
576 | seq_printf(seq, " %8lu %8lu %8lu", |
577 | mfc->mfc_un.res.pkt, | |
578 | mfc->mfc_un.res.bytes, | |
579 | mfc->mfc_un.res.wrong_if); | |
7bc570c8 YH |
580 | for (n = mfc->mfc_un.res.minvif; |
581 | n < mfc->mfc_un.res.maxvif; n++) { | |
6bd52143 | 582 | if (MIF_EXISTS(mrt, n) && |
7bc570c8 YH |
583 | mfc->mfc_un.res.ttls[n] < 255) |
584 | seq_printf(seq, | |
585 | " %2d:%-3d", | |
586 | n, mfc->mfc_un.res.ttls[n]); | |
587 | } | |
1ea472e2 BT |
588 | } else { |
589 | /* unresolved mfc_caches don't contain | |
590 | * pkt, bytes and wrong_if values | |
591 | */ | |
592 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
7bc570c8 YH |
593 | } |
594 | seq_putc(seq, '\n'); | |
595 | } | |
596 | return 0; | |
597 | } | |
598 | ||
88e9d34c | 599 | static const struct seq_operations ipmr_mfc_seq_ops = { |
7bc570c8 YH |
600 | .start = ipmr_mfc_seq_start, |
601 | .next = ipmr_mfc_seq_next, | |
602 | .stop = ipmr_mfc_seq_stop, | |
603 | .show = ipmr_mfc_seq_show, | |
604 | }; | |
605 | ||
606 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
607 | { | |
8b90fc7e BT |
608 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
609 | sizeof(struct ipmr_mfc_iter)); | |
7bc570c8 YH |
610 | } |
611 | ||
5ca1b998 | 612 | static const struct file_operations ip6mr_mfc_fops = { |
7bc570c8 YH |
613 | .owner = THIS_MODULE, |
614 | .open = ipmr_mfc_open, | |
615 | .read = seq_read, | |
616 | .llseek = seq_lseek, | |
8b90fc7e | 617 | .release = seq_release_net, |
7bc570c8 YH |
618 | }; |
619 | #endif | |
620 | ||
14fb64e1 | 621 | #ifdef CONFIG_IPV6_PIMSM_V2 |
14fb64e1 YH |
622 | |
623 | static int pim6_rcv(struct sk_buff *skb) | |
624 | { | |
625 | struct pimreghdr *pim; | |
626 | struct ipv6hdr *encap; | |
627 | struct net_device *reg_dev = NULL; | |
8229efda | 628 | struct net *net = dev_net(skb->dev); |
d1db275d | 629 | struct mr6_table *mrt; |
4c9483b2 DM |
630 | struct flowi6 fl6 = { |
631 | .flowi6_iif = skb->dev->ifindex, | |
632 | .flowi6_mark = skb->mark, | |
d1db275d PM |
633 | }; |
634 | int reg_vif_num; | |
14fb64e1 YH |
635 | |
636 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) | |
637 | goto drop; | |
638 | ||
639 | pim = (struct pimreghdr *)skb_transport_header(skb); | |
56245cae | 640 | if (pim->type != ((PIM_VERSION << 4) | PIM_TYPE_REGISTER) || |
14fb64e1 | 641 | (pim->flags & PIM_NULL_REGISTER) || |
1d6e55f1 TG |
642 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
643 | sizeof(*pim), IPPROTO_PIM, | |
644 | csum_partial((void *)pim, sizeof(*pim), 0)) && | |
ec6b486f | 645 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
14fb64e1 YH |
646 | goto drop; |
647 | ||
648 | /* check if the inner packet is destined to mcast group */ | |
649 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + | |
650 | sizeof(*pim)); | |
651 | ||
652 | if (!ipv6_addr_is_multicast(&encap->daddr) || | |
653 | encap->payload_len == 0 || | |
654 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) | |
655 | goto drop; | |
656 | ||
4c9483b2 | 657 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d PM |
658 | goto drop; |
659 | reg_vif_num = mrt->mroute_reg_vif_num; | |
660 | ||
14fb64e1 YH |
661 | read_lock(&mrt_lock); |
662 | if (reg_vif_num >= 0) | |
6bd52143 | 663 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
14fb64e1 YH |
664 | if (reg_dev) |
665 | dev_hold(reg_dev); | |
666 | read_unlock(&mrt_lock); | |
667 | ||
63159f29 | 668 | if (!reg_dev) |
14fb64e1 YH |
669 | goto drop; |
670 | ||
671 | skb->mac_header = skb->network_header; | |
672 | skb_pull(skb, (u8 *)encap - skb->data); | |
673 | skb_reset_network_header(skb); | |
1d6e55f1 | 674 | skb->protocol = htons(ETH_P_IPV6); |
3e49e6d5 | 675 | skb->ip_summed = CHECKSUM_NONE; |
d19d56dd | 676 | |
ea23192e | 677 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); |
d19d56dd | 678 | |
caf586e5 | 679 | netif_rx(skb); |
8990f468 | 680 | |
14fb64e1 YH |
681 | dev_put(reg_dev); |
682 | return 0; | |
683 | drop: | |
684 | kfree_skb(skb); | |
685 | return 0; | |
686 | } | |
687 | ||
41135cc8 | 688 | static const struct inet6_protocol pim6_protocol = { |
14fb64e1 YH |
689 | .handler = pim6_rcv, |
690 | }; | |
691 | ||
692 | /* Service routines creating virtual interfaces: PIMREG */ | |
693 | ||
6fef4c0c SH |
694 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
695 | struct net_device *dev) | |
14fb64e1 | 696 | { |
8229efda | 697 | struct net *net = dev_net(dev); |
d1db275d | 698 | struct mr6_table *mrt; |
4c9483b2 DM |
699 | struct flowi6 fl6 = { |
700 | .flowi6_oif = dev->ifindex, | |
6a662719 | 701 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 | 702 | .flowi6_mark = skb->mark, |
d1db275d PM |
703 | }; |
704 | int err; | |
705 | ||
4c9483b2 | 706 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
67928c40 BG |
707 | if (err < 0) { |
708 | kfree_skb(skb); | |
d1db275d | 709 | return err; |
67928c40 | 710 | } |
8229efda | 711 | |
14fb64e1 | 712 | read_lock(&mrt_lock); |
dc58c78c PE |
713 | dev->stats.tx_bytes += skb->len; |
714 | dev->stats.tx_packets++; | |
6bd52143 | 715 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
14fb64e1 YH |
716 | read_unlock(&mrt_lock); |
717 | kfree_skb(skb); | |
6ed10654 | 718 | return NETDEV_TX_OK; |
14fb64e1 YH |
719 | } |
720 | ||
ee9b9596 ND |
721 | static int reg_vif_get_iflink(const struct net_device *dev) |
722 | { | |
723 | return 0; | |
724 | } | |
725 | ||
007c3838 SH |
726 | static const struct net_device_ops reg_vif_netdev_ops = { |
727 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 728 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
729 | }; |
730 | ||
14fb64e1 YH |
731 | static void reg_vif_setup(struct net_device *dev) |
732 | { | |
733 | dev->type = ARPHRD_PIMREG; | |
734 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; | |
735 | dev->flags = IFF_NOARP; | |
007c3838 | 736 | dev->netdev_ops = ®_vif_netdev_ops; |
cf124db5 | 737 | dev->needs_free_netdev = true; |
403dbb97 | 738 | dev->features |= NETIF_F_NETNS_LOCAL; |
14fb64e1 YH |
739 | } |
740 | ||
d1db275d | 741 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
14fb64e1 YH |
742 | { |
743 | struct net_device *dev; | |
d1db275d PM |
744 | char name[IFNAMSIZ]; |
745 | ||
746 | if (mrt->id == RT6_TABLE_DFLT) | |
747 | sprintf(name, "pim6reg"); | |
748 | else | |
749 | sprintf(name, "pim6reg%u", mrt->id); | |
14fb64e1 | 750 | |
c835a677 | 751 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
63159f29 | 752 | if (!dev) |
14fb64e1 YH |
753 | return NULL; |
754 | ||
8229efda BT |
755 | dev_net_set(dev, net); |
756 | ||
14fb64e1 YH |
757 | if (register_netdevice(dev)) { |
758 | free_netdev(dev); | |
759 | return NULL; | |
760 | } | |
14fb64e1 | 761 | |
14fb64e1 YH |
762 | if (dev_open(dev)) |
763 | goto failure; | |
764 | ||
7af3db78 | 765 | dev_hold(dev); |
14fb64e1 YH |
766 | return dev; |
767 | ||
768 | failure: | |
14fb64e1 YH |
769 | unregister_netdevice(dev); |
770 | return NULL; | |
771 | } | |
772 | #endif | |
773 | ||
7bc570c8 YH |
774 | /* |
775 | * Delete a VIF entry | |
776 | */ | |
777 | ||
723b929c NA |
778 | static int mif6_delete(struct mr6_table *mrt, int vifi, int notify, |
779 | struct list_head *head) | |
7bc570c8 YH |
780 | { |
781 | struct mif_device *v; | |
782 | struct net_device *dev; | |
1d6e55f1 | 783 | struct inet6_dev *in6_dev; |
6bd52143 PM |
784 | |
785 | if (vifi < 0 || vifi >= mrt->maxvif) | |
7bc570c8 YH |
786 | return -EADDRNOTAVAIL; |
787 | ||
6bd52143 | 788 | v = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
789 | |
790 | write_lock_bh(&mrt_lock); | |
791 | dev = v->dev; | |
792 | v->dev = NULL; | |
793 | ||
794 | if (!dev) { | |
795 | write_unlock_bh(&mrt_lock); | |
796 | return -EADDRNOTAVAIL; | |
797 | } | |
798 | ||
14fb64e1 | 799 | #ifdef CONFIG_IPV6_PIMSM_V2 |
6bd52143 PM |
800 | if (vifi == mrt->mroute_reg_vif_num) |
801 | mrt->mroute_reg_vif_num = -1; | |
14fb64e1 YH |
802 | #endif |
803 | ||
6bd52143 | 804 | if (vifi + 1 == mrt->maxvif) { |
7bc570c8 YH |
805 | int tmp; |
806 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
6bd52143 | 807 | if (MIF_EXISTS(mrt, tmp)) |
7bc570c8 YH |
808 | break; |
809 | } | |
6bd52143 | 810 | mrt->maxvif = tmp + 1; |
7bc570c8 YH |
811 | } |
812 | ||
813 | write_unlock_bh(&mrt_lock); | |
814 | ||
815 | dev_set_allmulti(dev, -1); | |
816 | ||
1d6e55f1 | 817 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 818 | if (in6_dev) { |
1d6e55f1 | 819 | in6_dev->cnf.mc_forwarding--; |
85b3daad | 820 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
821 | NETCONFA_MC_FORWARDING, |
822 | dev->ifindex, &in6_dev->cnf); | |
823 | } | |
1d6e55f1 | 824 | |
723b929c | 825 | if ((v->flags & MIFF_REGISTER) && !notify) |
c871e664 | 826 | unregister_netdevice_queue(dev, head); |
7bc570c8 YH |
827 | |
828 | dev_put(dev); | |
829 | return 0; | |
830 | } | |
831 | ||
58701ad4 BT |
832 | static inline void ip6mr_cache_free(struct mfc6_cache *c) |
833 | { | |
58701ad4 BT |
834 | kmem_cache_free(mrt_cachep, c); |
835 | } | |
836 | ||
7bc570c8 YH |
837 | /* Destroy an unresolved cache entry, killing queued skbs |
838 | and reporting error to netlink readers. | |
839 | */ | |
840 | ||
6bd52143 | 841 | static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) |
7bc570c8 | 842 | { |
6bd52143 | 843 | struct net *net = read_pnet(&mrt->net); |
7bc570c8 YH |
844 | struct sk_buff *skb; |
845 | ||
6bd52143 | 846 | atomic_dec(&mrt->cache_resolve_queue_len); |
7bc570c8 | 847 | |
67ba4152 | 848 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { |
7bc570c8 | 849 | if (ipv6_hdr(skb)->version == 0) { |
af72868b JB |
850 | struct nlmsghdr *nlh = skb_pull(skb, |
851 | sizeof(struct ipv6hdr)); | |
7bc570c8 | 852 | nlh->nlmsg_type = NLMSG_ERROR; |
573ce260 | 853 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 854 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 855 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; |
15e47304 | 856 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 YH |
857 | } else |
858 | kfree_skb(skb); | |
859 | } | |
860 | ||
58701ad4 | 861 | ip6mr_cache_free(c); |
7bc570c8 YH |
862 | } |
863 | ||
864 | ||
c476efbc | 865 | /* Timer process for all the unresolved queue. */ |
7bc570c8 | 866 | |
6bd52143 | 867 | static void ipmr_do_expire_process(struct mr6_table *mrt) |
7bc570c8 YH |
868 | { |
869 | unsigned long now = jiffies; | |
870 | unsigned long expires = 10 * HZ; | |
f30a7784 | 871 | struct mfc6_cache *c, *next; |
7bc570c8 | 872 | |
6bd52143 | 873 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
7bc570c8 YH |
874 | if (time_after(c->mfc_un.unres.expires, now)) { |
875 | /* not yet... */ | |
876 | unsigned long interval = c->mfc_un.unres.expires - now; | |
877 | if (interval < expires) | |
878 | expires = interval; | |
7bc570c8 YH |
879 | continue; |
880 | } | |
881 | ||
f30a7784 | 882 | list_del(&c->list); |
812e44dd | 883 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 884 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
885 | } |
886 | ||
6bd52143 PM |
887 | if (!list_empty(&mrt->mfc6_unres_queue)) |
888 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
7bc570c8 YH |
889 | } |
890 | ||
e99e88a9 | 891 | static void ipmr_expire_process(struct timer_list *t) |
7bc570c8 | 892 | { |
e99e88a9 | 893 | struct mr6_table *mrt = from_timer(mrt, t, ipmr_expire_timer); |
c476efbc | 894 | |
7bc570c8 | 895 | if (!spin_trylock(&mfc_unres_lock)) { |
6bd52143 | 896 | mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); |
7bc570c8 YH |
897 | return; |
898 | } | |
899 | ||
6bd52143 PM |
900 | if (!list_empty(&mrt->mfc6_unres_queue)) |
901 | ipmr_do_expire_process(mrt); | |
7bc570c8 YH |
902 | |
903 | spin_unlock(&mfc_unres_lock); | |
904 | } | |
905 | ||
906 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
907 | ||
6bd52143 | 908 | static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, |
b5aa30b1 | 909 | unsigned char *ttls) |
7bc570c8 YH |
910 | { |
911 | int vifi; | |
912 | ||
6ac7eb08 | 913 | cache->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 | 914 | cache->mfc_un.res.maxvif = 0; |
6ac7eb08 | 915 | memset(cache->mfc_un.res.ttls, 255, MAXMIFS); |
7bc570c8 | 916 | |
6bd52143 PM |
917 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
918 | if (MIF_EXISTS(mrt, vifi) && | |
4e16880c | 919 | ttls[vifi] && ttls[vifi] < 255) { |
7bc570c8 YH |
920 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
921 | if (cache->mfc_un.res.minvif > vifi) | |
922 | cache->mfc_un.res.minvif = vifi; | |
923 | if (cache->mfc_un.res.maxvif <= vifi) | |
924 | cache->mfc_un.res.maxvif = vifi + 1; | |
925 | } | |
926 | } | |
90b5ca17 | 927 | cache->mfc_un.res.lastuse = jiffies; |
7bc570c8 YH |
928 | } |
929 | ||
6bd52143 PM |
930 | static int mif6_add(struct net *net, struct mr6_table *mrt, |
931 | struct mif6ctl *vifc, int mrtsock) | |
7bc570c8 YH |
932 | { |
933 | int vifi = vifc->mif6c_mifi; | |
6bd52143 | 934 | struct mif_device *v = &mrt->vif6_table[vifi]; |
7bc570c8 | 935 | struct net_device *dev; |
1d6e55f1 | 936 | struct inet6_dev *in6_dev; |
5ae7b444 | 937 | int err; |
7bc570c8 YH |
938 | |
939 | /* Is vif busy ? */ | |
6bd52143 | 940 | if (MIF_EXISTS(mrt, vifi)) |
7bc570c8 YH |
941 | return -EADDRINUSE; |
942 | ||
943 | switch (vifc->mif6c_flags) { | |
14fb64e1 YH |
944 | #ifdef CONFIG_IPV6_PIMSM_V2 |
945 | case MIFF_REGISTER: | |
946 | /* | |
947 | * Special Purpose VIF in PIM | |
948 | * All the packets will be sent to the daemon | |
949 | */ | |
6bd52143 | 950 | if (mrt->mroute_reg_vif_num >= 0) |
14fb64e1 | 951 | return -EADDRINUSE; |
d1db275d | 952 | dev = ip6mr_reg_vif(net, mrt); |
14fb64e1 YH |
953 | if (!dev) |
954 | return -ENOBUFS; | |
5ae7b444 WC |
955 | err = dev_set_allmulti(dev, 1); |
956 | if (err) { | |
957 | unregister_netdevice(dev); | |
7af3db78 | 958 | dev_put(dev); |
5ae7b444 WC |
959 | return err; |
960 | } | |
14fb64e1 YH |
961 | break; |
962 | #endif | |
7bc570c8 | 963 | case 0: |
8229efda | 964 | dev = dev_get_by_index(net, vifc->mif6c_pifi); |
7bc570c8 YH |
965 | if (!dev) |
966 | return -EADDRNOTAVAIL; | |
5ae7b444 | 967 | err = dev_set_allmulti(dev, 1); |
7af3db78 WC |
968 | if (err) { |
969 | dev_put(dev); | |
5ae7b444 | 970 | return err; |
7af3db78 | 971 | } |
7bc570c8 YH |
972 | break; |
973 | default: | |
974 | return -EINVAL; | |
975 | } | |
976 | ||
1d6e55f1 | 977 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 978 | if (in6_dev) { |
1d6e55f1 | 979 | in6_dev->cnf.mc_forwarding++; |
85b3daad | 980 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
981 | NETCONFA_MC_FORWARDING, |
982 | dev->ifindex, &in6_dev->cnf); | |
983 | } | |
1d6e55f1 | 984 | |
7bc570c8 YH |
985 | /* |
986 | * Fill in the VIF structures | |
987 | */ | |
988 | v->rate_limit = vifc->vifc_rate_limit; | |
989 | v->flags = vifc->mif6c_flags; | |
990 | if (!mrtsock) | |
991 | v->flags |= VIFF_STATIC; | |
992 | v->threshold = vifc->vifc_threshold; | |
993 | v->bytes_in = 0; | |
994 | v->bytes_out = 0; | |
995 | v->pkt_in = 0; | |
996 | v->pkt_out = 0; | |
997 | v->link = dev->ifindex; | |
998 | if (v->flags & MIFF_REGISTER) | |
a54acb3a | 999 | v->link = dev_get_iflink(dev); |
7bc570c8 YH |
1000 | |
1001 | /* And finish update writing critical data */ | |
1002 | write_lock_bh(&mrt_lock); | |
7bc570c8 | 1003 | v->dev = dev; |
14fb64e1 YH |
1004 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1005 | if (v->flags & MIFF_REGISTER) | |
6bd52143 | 1006 | mrt->mroute_reg_vif_num = vifi; |
14fb64e1 | 1007 | #endif |
6bd52143 PM |
1008 | if (vifi + 1 > mrt->maxvif) |
1009 | mrt->maxvif = vifi + 1; | |
7bc570c8 YH |
1010 | write_unlock_bh(&mrt_lock); |
1011 | return 0; | |
1012 | } | |
1013 | ||
6bd52143 | 1014 | static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt, |
b71d1d42 ED |
1015 | const struct in6_addr *origin, |
1016 | const struct in6_addr *mcastgrp) | |
7bc570c8 YH |
1017 | { |
1018 | int line = MFC6_HASH(mcastgrp, origin); | |
1019 | struct mfc6_cache *c; | |
1020 | ||
6bd52143 | 1021 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 YH |
1022 | if (ipv6_addr_equal(&c->mf6c_origin, origin) && |
1023 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) | |
f30a7784 | 1024 | return c; |
7bc570c8 | 1025 | } |
f30a7784 | 1026 | return NULL; |
7bc570c8 YH |
1027 | } |
1028 | ||
660b26dc ND |
1029 | /* Look for a (*,*,oif) entry */ |
1030 | static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt, | |
1031 | mifi_t mifi) | |
1032 | { | |
1033 | int line = MFC6_HASH(&in6addr_any, &in6addr_any); | |
1034 | struct mfc6_cache *c; | |
1035 | ||
1036 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1037 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1038 | ipv6_addr_any(&c->mf6c_mcastgrp) && | |
1039 | (c->mfc_un.res.ttls[mifi] < 255)) | |
1040 | return c; | |
1041 | ||
1042 | return NULL; | |
1043 | } | |
1044 | ||
1045 | /* Look for a (*,G) entry */ | |
1046 | static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt, | |
1047 | struct in6_addr *mcastgrp, | |
1048 | mifi_t mifi) | |
1049 | { | |
1050 | int line = MFC6_HASH(mcastgrp, &in6addr_any); | |
1051 | struct mfc6_cache *c, *proxy; | |
1052 | ||
1053 | if (ipv6_addr_any(mcastgrp)) | |
1054 | goto skip; | |
1055 | ||
1056 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1057 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1058 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) { | |
1059 | if (c->mfc_un.res.ttls[mifi] < 255) | |
1060 | return c; | |
1061 | ||
1062 | /* It's ok if the mifi is part of the static tree */ | |
1063 | proxy = ip6mr_cache_find_any_parent(mrt, | |
1064 | c->mf6c_parent); | |
1065 | if (proxy && proxy->mfc_un.res.ttls[mifi] < 255) | |
1066 | return c; | |
1067 | } | |
1068 | ||
1069 | skip: | |
1070 | return ip6mr_cache_find_any_parent(mrt, mifi); | |
1071 | } | |
1072 | ||
7bc570c8 YH |
1073 | /* |
1074 | * Allocate a multicast cache entry | |
1075 | */ | |
b5aa30b1 | 1076 | static struct mfc6_cache *ip6mr_cache_alloc(void) |
7bc570c8 | 1077 | { |
36cbac59 | 1078 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
63159f29 | 1079 | if (!c) |
7bc570c8 | 1080 | return NULL; |
70a0dec4 | 1081 | c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1; |
6ac7eb08 | 1082 | c->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 YH |
1083 | return c; |
1084 | } | |
1085 | ||
b5aa30b1 | 1086 | static struct mfc6_cache *ip6mr_cache_alloc_unres(void) |
7bc570c8 | 1087 | { |
36cbac59 | 1088 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
63159f29 | 1089 | if (!c) |
7bc570c8 | 1090 | return NULL; |
7bc570c8 YH |
1091 | skb_queue_head_init(&c->mfc_un.unres.unresolved); |
1092 | c->mfc_un.unres.expires = jiffies + 10 * HZ; | |
1093 | return c; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * A cache entry has gone into a resolved state from queued | |
1098 | */ | |
1099 | ||
6bd52143 PM |
1100 | static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt, |
1101 | struct mfc6_cache *uc, struct mfc6_cache *c) | |
7bc570c8 YH |
1102 | { |
1103 | struct sk_buff *skb; | |
1104 | ||
1105 | /* | |
1106 | * Play the pending entries through our router | |
1107 | */ | |
1108 | ||
67ba4152 | 1109 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
7bc570c8 | 1110 | if (ipv6_hdr(skb)->version == 0) { |
af72868b JB |
1111 | struct nlmsghdr *nlh = skb_pull(skb, |
1112 | sizeof(struct ipv6hdr)); | |
7bc570c8 | 1113 | |
573ce260 | 1114 | if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
549e028d | 1115 | nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; |
7bc570c8 YH |
1116 | } else { |
1117 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1118 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 1119 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1120 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; |
7bc570c8 | 1121 | } |
15e47304 | 1122 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 | 1123 | } else |
6bd52143 | 1124 | ip6_mr_forward(net, mrt, skb, c); |
7bc570c8 YH |
1125 | } |
1126 | } | |
1127 | ||
1128 | /* | |
dd12d15c | 1129 | * Bounce a cache query up to pim6sd and netlink. |
7bc570c8 YH |
1130 | * |
1131 | * Called under mrt_lock. | |
1132 | */ | |
1133 | ||
6bd52143 PM |
1134 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
1135 | mifi_t mifi, int assert) | |
7bc570c8 YH |
1136 | { |
1137 | struct sk_buff *skb; | |
1138 | struct mrt6msg *msg; | |
1139 | int ret; | |
1140 | ||
14fb64e1 YH |
1141 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1142 | if (assert == MRT6MSG_WHOLEPKT) | |
1143 | skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt) | |
1144 | +sizeof(*msg)); | |
1145 | else | |
1146 | #endif | |
1147 | skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC); | |
7bc570c8 YH |
1148 | |
1149 | if (!skb) | |
1150 | return -ENOBUFS; | |
1151 | ||
1152 | /* I suppose that internal messages | |
1153 | * do not require checksums */ | |
1154 | ||
1155 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1156 | ||
14fb64e1 YH |
1157 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1158 | if (assert == MRT6MSG_WHOLEPKT) { | |
1159 | /* Ugly, but we have no choice with this interface. | |
1160 | Duplicate old header, fix length etc. | |
1161 | And all this only to mangle msg->im6_msgtype and | |
1162 | to set msg->im6_mbz to "mbz" :-) | |
1163 | */ | |
1164 | skb_push(skb, -skb_network_offset(pkt)); | |
1165 | ||
1166 | skb_push(skb, sizeof(*msg)); | |
1167 | skb_reset_transport_header(skb); | |
1168 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1169 | msg->im6_mbz = 0; | |
1170 | msg->im6_msgtype = MRT6MSG_WHOLEPKT; | |
6bd52143 | 1171 | msg->im6_mif = mrt->mroute_reg_vif_num; |
14fb64e1 | 1172 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1173 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1174 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
14fb64e1 YH |
1175 | |
1176 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1177 | } else | |
1178 | #endif | |
1179 | { | |
7bc570c8 YH |
1180 | /* |
1181 | * Copy the IP header | |
1182 | */ | |
1183 | ||
1184 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1185 | skb_reset_network_header(skb); | |
1186 | skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr)); | |
1187 | ||
1188 | /* | |
1189 | * Add our header | |
1190 | */ | |
1191 | skb_put(skb, sizeof(*msg)); | |
1192 | skb_reset_transport_header(skb); | |
1193 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1194 | ||
1195 | msg->im6_mbz = 0; | |
1196 | msg->im6_msgtype = assert; | |
6ac7eb08 | 1197 | msg->im6_mif = mifi; |
7bc570c8 | 1198 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1199 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1200 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
7bc570c8 | 1201 | |
adf30907 | 1202 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); |
7bc570c8 | 1203 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
14fb64e1 | 1204 | } |
7bc570c8 | 1205 | |
63159f29 | 1206 | if (!mrt->mroute6_sk) { |
7bc570c8 YH |
1207 | kfree_skb(skb); |
1208 | return -EINVAL; | |
1209 | } | |
1210 | ||
dd12d15c JG |
1211 | mrt6msg_netlink_event(mrt, skb); |
1212 | ||
7bc570c8 YH |
1213 | /* |
1214 | * Deliver to user space multicast routing algorithms | |
1215 | */ | |
6bd52143 | 1216 | ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); |
bd91b8bf | 1217 | if (ret < 0) { |
e87cc472 | 1218 | net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); |
7bc570c8 YH |
1219 | kfree_skb(skb); |
1220 | } | |
1221 | ||
1222 | return ret; | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Queue a packet for resolution. It gets locked cache entry! | |
1227 | */ | |
1228 | ||
1229 | static int | |
6bd52143 | 1230 | ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) |
7bc570c8 | 1231 | { |
f30a7784 | 1232 | bool found = false; |
7bc570c8 YH |
1233 | int err; |
1234 | struct mfc6_cache *c; | |
1235 | ||
1236 | spin_lock_bh(&mfc_unres_lock); | |
6bd52143 | 1237 | list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1238 | if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && |
f30a7784 PM |
1239 | ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { |
1240 | found = true; | |
7bc570c8 | 1241 | break; |
f30a7784 | 1242 | } |
7bc570c8 YH |
1243 | } |
1244 | ||
f30a7784 | 1245 | if (!found) { |
7bc570c8 YH |
1246 | /* |
1247 | * Create a new entry if allowable | |
1248 | */ | |
1249 | ||
6bd52143 | 1250 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
b5aa30b1 | 1251 | (c = ip6mr_cache_alloc_unres()) == NULL) { |
7bc570c8 YH |
1252 | spin_unlock_bh(&mfc_unres_lock); |
1253 | ||
1254 | kfree_skb(skb); | |
1255 | return -ENOBUFS; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Fill in the new cache entry | |
1260 | */ | |
1261 | c->mf6c_parent = -1; | |
1262 | c->mf6c_origin = ipv6_hdr(skb)->saddr; | |
1263 | c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; | |
1264 | ||
1265 | /* | |
1266 | * Reflect first query at pim6sd | |
1267 | */ | |
6bd52143 | 1268 | err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); |
8229efda | 1269 | if (err < 0) { |
7bc570c8 YH |
1270 | /* If the report failed throw the cache entry |
1271 | out - Brad Parker | |
1272 | */ | |
1273 | spin_unlock_bh(&mfc_unres_lock); | |
1274 | ||
58701ad4 | 1275 | ip6mr_cache_free(c); |
7bc570c8 YH |
1276 | kfree_skb(skb); |
1277 | return err; | |
1278 | } | |
1279 | ||
6bd52143 PM |
1280 | atomic_inc(&mrt->cache_resolve_queue_len); |
1281 | list_add(&c->list, &mrt->mfc6_unres_queue); | |
812e44dd | 1282 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 | 1283 | |
6bd52143 | 1284 | ipmr_do_expire_process(mrt); |
7bc570c8 YH |
1285 | } |
1286 | ||
1287 | /* | |
1288 | * See if we can append the packet | |
1289 | */ | |
1290 | if (c->mfc_un.unres.unresolved.qlen > 3) { | |
1291 | kfree_skb(skb); | |
1292 | err = -ENOBUFS; | |
1293 | } else { | |
1294 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); | |
1295 | err = 0; | |
1296 | } | |
1297 | ||
1298 | spin_unlock_bh(&mfc_unres_lock); | |
1299 | return err; | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * MFC6 cache manipulation by user space | |
1304 | */ | |
1305 | ||
660b26dc ND |
1306 | static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, |
1307 | int parent) | |
7bc570c8 YH |
1308 | { |
1309 | int line; | |
f30a7784 | 1310 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1311 | |
1312 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1313 | ||
6bd52143 | 1314 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1315 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1316 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1317 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1318 | (parent == -1 || parent == c->mf6c_parent)) { | |
7bc570c8 | 1319 | write_lock_bh(&mrt_lock); |
f30a7784 | 1320 | list_del(&c->list); |
7bc570c8 YH |
1321 | write_unlock_bh(&mrt_lock); |
1322 | ||
812e44dd | 1323 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1324 | ip6mr_cache_free(c); |
7bc570c8 YH |
1325 | return 0; |
1326 | } | |
1327 | } | |
1328 | return -ENOENT; | |
1329 | } | |
1330 | ||
1331 | static int ip6mr_device_event(struct notifier_block *this, | |
1332 | unsigned long event, void *ptr) | |
1333 | { | |
351638e7 | 1334 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
8229efda | 1335 | struct net *net = dev_net(dev); |
d1db275d | 1336 | struct mr6_table *mrt; |
7bc570c8 YH |
1337 | struct mif_device *v; |
1338 | int ct; | |
1339 | ||
7bc570c8 YH |
1340 | if (event != NETDEV_UNREGISTER) |
1341 | return NOTIFY_DONE; | |
1342 | ||
d1db275d PM |
1343 | ip6mr_for_each_table(mrt, net) { |
1344 | v = &mrt->vif6_table[0]; | |
1345 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1346 | if (v->dev == dev) | |
723b929c | 1347 | mif6_delete(mrt, ct, 1, NULL); |
d1db275d | 1348 | } |
7bc570c8 | 1349 | } |
c871e664 | 1350 | |
7bc570c8 YH |
1351 | return NOTIFY_DONE; |
1352 | } | |
1353 | ||
1354 | static struct notifier_block ip6_mr_notifier = { | |
1355 | .notifier_call = ip6mr_device_event | |
1356 | }; | |
1357 | ||
1358 | /* | |
1359 | * Setup for IP multicast routing | |
1360 | */ | |
1361 | ||
4e16880c BT |
1362 | static int __net_init ip6mr_net_init(struct net *net) |
1363 | { | |
d1db275d | 1364 | int err; |
f30a7784 | 1365 | |
d1db275d PM |
1366 | err = ip6mr_rules_init(net); |
1367 | if (err < 0) | |
4e16880c | 1368 | goto fail; |
8b90fc7e BT |
1369 | |
1370 | #ifdef CONFIG_PROC_FS | |
1371 | err = -ENOMEM; | |
d4beaa66 | 1372 | if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) |
8b90fc7e | 1373 | goto proc_vif_fail; |
d4beaa66 | 1374 | if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) |
8b90fc7e BT |
1375 | goto proc_cache_fail; |
1376 | #endif | |
6bd52143 | 1377 | |
4a6258a0 BT |
1378 | return 0; |
1379 | ||
8b90fc7e BT |
1380 | #ifdef CONFIG_PROC_FS |
1381 | proc_cache_fail: | |
ece31ffd | 1382 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
8b90fc7e | 1383 | proc_vif_fail: |
d1db275d | 1384 | ip6mr_rules_exit(net); |
8b90fc7e | 1385 | #endif |
4e16880c BT |
1386 | fail: |
1387 | return err; | |
1388 | } | |
1389 | ||
1390 | static void __net_exit ip6mr_net_exit(struct net *net) | |
1391 | { | |
8b90fc7e | 1392 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
1393 | remove_proc_entry("ip6_mr_cache", net->proc_net); |
1394 | remove_proc_entry("ip6_mr_vif", net->proc_net); | |
8b90fc7e | 1395 | #endif |
d1db275d | 1396 | ip6mr_rules_exit(net); |
4e16880c BT |
1397 | } |
1398 | ||
1399 | static struct pernet_operations ip6mr_net_ops = { | |
1400 | .init = ip6mr_net_init, | |
1401 | .exit = ip6mr_net_exit, | |
1402 | }; | |
1403 | ||
623d1a1a | 1404 | int __init ip6_mr_init(void) |
7bc570c8 | 1405 | { |
623d1a1a WC |
1406 | int err; |
1407 | ||
7bc570c8 YH |
1408 | mrt_cachep = kmem_cache_create("ip6_mrt_cache", |
1409 | sizeof(struct mfc6_cache), | |
1410 | 0, SLAB_HWCACHE_ALIGN, | |
1411 | NULL); | |
1412 | if (!mrt_cachep) | |
623d1a1a | 1413 | return -ENOMEM; |
7bc570c8 | 1414 | |
4e16880c BT |
1415 | err = register_pernet_subsys(&ip6mr_net_ops); |
1416 | if (err) | |
1417 | goto reg_pernet_fail; | |
1418 | ||
623d1a1a WC |
1419 | err = register_netdevice_notifier(&ip6_mr_notifier); |
1420 | if (err) | |
1421 | goto reg_notif_fail; | |
403dbb97 TG |
1422 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1423 | if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { | |
f3213831 | 1424 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
1425 | err = -EAGAIN; |
1426 | goto add_proto_fail; | |
1427 | } | |
1428 | #endif | |
c7ac8679 | 1429 | rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, |
b97bac64 | 1430 | ip6mr_rtm_dumproute, 0); |
623d1a1a | 1431 | return 0; |
403dbb97 TG |
1432 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1433 | add_proto_fail: | |
1434 | unregister_netdevice_notifier(&ip6_mr_notifier); | |
1435 | #endif | |
87b30a65 | 1436 | reg_notif_fail: |
4e16880c BT |
1437 | unregister_pernet_subsys(&ip6mr_net_ops); |
1438 | reg_pernet_fail: | |
87b30a65 | 1439 | kmem_cache_destroy(mrt_cachep); |
623d1a1a | 1440 | return err; |
7bc570c8 YH |
1441 | } |
1442 | ||
623d1a1a WC |
1443 | void ip6_mr_cleanup(void) |
1444 | { | |
ffb1388a DJ |
1445 | rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE); |
1446 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1447 | inet6_del_protocol(&pim6_protocol, IPPROTO_PIM); | |
1448 | #endif | |
623d1a1a | 1449 | unregister_netdevice_notifier(&ip6_mr_notifier); |
4e16880c | 1450 | unregister_pernet_subsys(&ip6mr_net_ops); |
623d1a1a WC |
1451 | kmem_cache_destroy(mrt_cachep); |
1452 | } | |
7bc570c8 | 1453 | |
6bd52143 | 1454 | static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, |
660b26dc | 1455 | struct mf6cctl *mfc, int mrtsock, int parent) |
7bc570c8 | 1456 | { |
f30a7784 | 1457 | bool found = false; |
7bc570c8 | 1458 | int line; |
f30a7784 | 1459 | struct mfc6_cache *uc, *c; |
6ac7eb08 | 1460 | unsigned char ttls[MAXMIFS]; |
7bc570c8 YH |
1461 | int i; |
1462 | ||
a50436f2 PM |
1463 | if (mfc->mf6cc_parent >= MAXMIFS) |
1464 | return -ENFILE; | |
1465 | ||
6ac7eb08 RR |
1466 | memset(ttls, 255, MAXMIFS); |
1467 | for (i = 0; i < MAXMIFS; i++) { | |
7bc570c8 YH |
1468 | if (IF_ISSET(i, &mfc->mf6cc_ifset)) |
1469 | ttls[i] = 1; | |
1470 | ||
1471 | } | |
1472 | ||
1473 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1474 | ||
6bd52143 | 1475 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1476 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1477 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1478 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1479 | (parent == -1 || parent == mfc->mf6cc_parent)) { | |
f30a7784 | 1480 | found = true; |
7bc570c8 | 1481 | break; |
f30a7784 | 1482 | } |
7bc570c8 YH |
1483 | } |
1484 | ||
f30a7784 | 1485 | if (found) { |
7bc570c8 YH |
1486 | write_lock_bh(&mrt_lock); |
1487 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1488 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1489 | if (!mrtsock) |
1490 | c->mfc_flags |= MFC_STATIC; | |
1491 | write_unlock_bh(&mrt_lock); | |
812e44dd | 1492 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1493 | return 0; |
1494 | } | |
1495 | ||
660b26dc ND |
1496 | if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && |
1497 | !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) | |
7bc570c8 YH |
1498 | return -EINVAL; |
1499 | ||
b5aa30b1 | 1500 | c = ip6mr_cache_alloc(); |
63159f29 | 1501 | if (!c) |
7bc570c8 YH |
1502 | return -ENOMEM; |
1503 | ||
1504 | c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; | |
1505 | c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; | |
1506 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1507 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1508 | if (!mrtsock) |
1509 | c->mfc_flags |= MFC_STATIC; | |
1510 | ||
1511 | write_lock_bh(&mrt_lock); | |
6bd52143 | 1512 | list_add(&c->list, &mrt->mfc6_cache_array[line]); |
7bc570c8 YH |
1513 | write_unlock_bh(&mrt_lock); |
1514 | ||
1515 | /* | |
1516 | * Check to see if we resolved a queued list. If so we | |
1517 | * need to send on the frames and tidy up. | |
1518 | */ | |
f30a7784 | 1519 | found = false; |
7bc570c8 | 1520 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1521 | list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1522 | if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && |
7bc570c8 | 1523 | ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { |
f30a7784 | 1524 | list_del(&uc->list); |
6bd52143 | 1525 | atomic_dec(&mrt->cache_resolve_queue_len); |
f30a7784 | 1526 | found = true; |
7bc570c8 YH |
1527 | break; |
1528 | } | |
1529 | } | |
6bd52143 PM |
1530 | if (list_empty(&mrt->mfc6_unres_queue)) |
1531 | del_timer(&mrt->ipmr_expire_timer); | |
7bc570c8 YH |
1532 | spin_unlock_bh(&mfc_unres_lock); |
1533 | ||
f30a7784 | 1534 | if (found) { |
6bd52143 | 1535 | ip6mr_cache_resolve(net, mrt, uc, c); |
58701ad4 | 1536 | ip6mr_cache_free(uc); |
7bc570c8 | 1537 | } |
812e44dd | 1538 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1539 | return 0; |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * Close the multicast socket, and clear the vif tables etc | |
1544 | */ | |
1545 | ||
4c698046 | 1546 | static void mroute_clean_tables(struct mr6_table *mrt, bool all) |
7bc570c8 YH |
1547 | { |
1548 | int i; | |
c871e664 | 1549 | LIST_HEAD(list); |
f30a7784 | 1550 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1551 | |
1552 | /* | |
1553 | * Shut down all active vif entries | |
1554 | */ | |
6bd52143 | 1555 | for (i = 0; i < mrt->maxvif; i++) { |
4c698046 NA |
1556 | if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) |
1557 | continue; | |
723b929c | 1558 | mif6_delete(mrt, i, 0, &list); |
7bc570c8 | 1559 | } |
c871e664 | 1560 | unregister_netdevice_many(&list); |
7bc570c8 YH |
1561 | |
1562 | /* | |
1563 | * Wipe the cache | |
1564 | */ | |
4a6258a0 | 1565 | for (i = 0; i < MFC6_LINES; i++) { |
6bd52143 | 1566 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { |
4c698046 | 1567 | if (!all && (c->mfc_flags & MFC_STATIC)) |
7bc570c8 | 1568 | continue; |
7bc570c8 | 1569 | write_lock_bh(&mrt_lock); |
f30a7784 | 1570 | list_del(&c->list); |
7bc570c8 YH |
1571 | write_unlock_bh(&mrt_lock); |
1572 | ||
812e44dd | 1573 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1574 | ip6mr_cache_free(c); |
7bc570c8 YH |
1575 | } |
1576 | } | |
1577 | ||
6bd52143 | 1578 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
7bc570c8 | 1579 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1580 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
f30a7784 | 1581 | list_del(&c->list); |
812e44dd | 1582 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 1583 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
1584 | } |
1585 | spin_unlock_bh(&mfc_unres_lock); | |
1586 | } | |
1587 | } | |
1588 | ||
6bd52143 | 1589 | static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) |
7bc570c8 YH |
1590 | { |
1591 | int err = 0; | |
8229efda | 1592 | struct net *net = sock_net(sk); |
7bc570c8 YH |
1593 | |
1594 | rtnl_lock(); | |
1595 | write_lock_bh(&mrt_lock); | |
6bd52143 PM |
1596 | if (likely(mrt->mroute6_sk == NULL)) { |
1597 | mrt->mroute6_sk = sk; | |
1d6e55f1 | 1598 | net->ipv6.devconf_all->mc_forwarding++; |
927265bc | 1599 | } else { |
7bc570c8 | 1600 | err = -EADDRINUSE; |
927265bc | 1601 | } |
7bc570c8 YH |
1602 | write_unlock_bh(&mrt_lock); |
1603 | ||
927265bc | 1604 | if (!err) |
85b3daad DA |
1605 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1606 | NETCONFA_MC_FORWARDING, | |
927265bc ED |
1607 | NETCONFA_IFINDEX_ALL, |
1608 | net->ipv6.devconf_all); | |
7bc570c8 YH |
1609 | rtnl_unlock(); |
1610 | ||
1611 | return err; | |
1612 | } | |
1613 | ||
1614 | int ip6mr_sk_done(struct sock *sk) | |
1615 | { | |
d1db275d | 1616 | int err = -EACCES; |
8229efda | 1617 | struct net *net = sock_net(sk); |
d1db275d | 1618 | struct mr6_table *mrt; |
7bc570c8 | 1619 | |
338d182f FR |
1620 | if (sk->sk_type != SOCK_RAW || |
1621 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1622 | return err; | |
1623 | ||
7bc570c8 | 1624 | rtnl_lock(); |
d1db275d PM |
1625 | ip6mr_for_each_table(mrt, net) { |
1626 | if (sk == mrt->mroute6_sk) { | |
1627 | write_lock_bh(&mrt_lock); | |
1628 | mrt->mroute6_sk = NULL; | |
1629 | net->ipv6.devconf_all->mc_forwarding--; | |
927265bc | 1630 | write_unlock_bh(&mrt_lock); |
85b3daad | 1631 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
d67b8c61 ND |
1632 | NETCONFA_MC_FORWARDING, |
1633 | NETCONFA_IFINDEX_ALL, | |
1634 | net->ipv6.devconf_all); | |
7bc570c8 | 1635 | |
4c698046 | 1636 | mroute_clean_tables(mrt, false); |
d1db275d PM |
1637 | err = 0; |
1638 | break; | |
1639 | } | |
1640 | } | |
7bc570c8 YH |
1641 | rtnl_unlock(); |
1642 | ||
1643 | return err; | |
1644 | } | |
1645 | ||
d1db275d | 1646 | struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) |
6bd52143 | 1647 | { |
d1db275d | 1648 | struct mr6_table *mrt; |
4c9483b2 | 1649 | struct flowi6 fl6 = { |
e374c618 | 1650 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 DM |
1651 | .flowi6_oif = skb->dev->ifindex, |
1652 | .flowi6_mark = skb->mark, | |
d1db275d PM |
1653 | }; |
1654 | ||
4c9483b2 | 1655 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d | 1656 | return NULL; |
6bd52143 PM |
1657 | |
1658 | return mrt->mroute6_sk; | |
1659 | } | |
1660 | ||
7bc570c8 YH |
1661 | /* |
1662 | * Socket options and virtual interface manipulation. The whole | |
1663 | * virtual interface system is a complete heap, but unfortunately | |
1664 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1665 | * MOSPF/PIM router set up we can clean this up. | |
1666 | */ | |
1667 | ||
b7058842 | 1668 | int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
7bc570c8 | 1669 | { |
660b26dc | 1670 | int ret, parent = 0; |
7bc570c8 YH |
1671 | struct mif6ctl vif; |
1672 | struct mf6cctl mfc; | |
1673 | mifi_t mifi; | |
8229efda | 1674 | struct net *net = sock_net(sk); |
d1db275d PM |
1675 | struct mr6_table *mrt; |
1676 | ||
99253eb7 XL |
1677 | if (sk->sk_type != SOCK_RAW || |
1678 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1679 | return -EOPNOTSUPP; | |
1680 | ||
d1db275d | 1681 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
63159f29 | 1682 | if (!mrt) |
d1db275d | 1683 | return -ENOENT; |
7bc570c8 YH |
1684 | |
1685 | if (optname != MRT6_INIT) { | |
af31f412 | 1686 | if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
7bc570c8 YH |
1687 | return -EACCES; |
1688 | } | |
1689 | ||
1690 | switch (optname) { | |
1691 | case MRT6_INIT: | |
7bc570c8 YH |
1692 | if (optlen < sizeof(int)) |
1693 | return -EINVAL; | |
1694 | ||
6bd52143 | 1695 | return ip6mr_sk_init(mrt, sk); |
7bc570c8 YH |
1696 | |
1697 | case MRT6_DONE: | |
1698 | return ip6mr_sk_done(sk); | |
1699 | ||
1700 | case MRT6_ADD_MIF: | |
1701 | if (optlen < sizeof(vif)) | |
1702 | return -EINVAL; | |
1703 | if (copy_from_user(&vif, optval, sizeof(vif))) | |
1704 | return -EFAULT; | |
6ac7eb08 | 1705 | if (vif.mif6c_mifi >= MAXMIFS) |
7bc570c8 YH |
1706 | return -ENFILE; |
1707 | rtnl_lock(); | |
6bd52143 | 1708 | ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); |
7bc570c8 YH |
1709 | rtnl_unlock(); |
1710 | return ret; | |
1711 | ||
1712 | case MRT6_DEL_MIF: | |
1713 | if (optlen < sizeof(mifi_t)) | |
1714 | return -EINVAL; | |
1715 | if (copy_from_user(&mifi, optval, sizeof(mifi_t))) | |
1716 | return -EFAULT; | |
1717 | rtnl_lock(); | |
723b929c | 1718 | ret = mif6_delete(mrt, mifi, 0, NULL); |
7bc570c8 YH |
1719 | rtnl_unlock(); |
1720 | return ret; | |
1721 | ||
1722 | /* | |
1723 | * Manipulate the forwarding caches. These live | |
1724 | * in a sort of kernel/user symbiosis. | |
1725 | */ | |
1726 | case MRT6_ADD_MFC: | |
1727 | case MRT6_DEL_MFC: | |
660b26dc | 1728 | parent = -1; |
275757e6 | 1729 | /* fall through */ |
660b26dc ND |
1730 | case MRT6_ADD_MFC_PROXY: |
1731 | case MRT6_DEL_MFC_PROXY: | |
7bc570c8 YH |
1732 | if (optlen < sizeof(mfc)) |
1733 | return -EINVAL; | |
1734 | if (copy_from_user(&mfc, optval, sizeof(mfc))) | |
1735 | return -EFAULT; | |
660b26dc ND |
1736 | if (parent == 0) |
1737 | parent = mfc.mf6cc_parent; | |
7bc570c8 | 1738 | rtnl_lock(); |
660b26dc ND |
1739 | if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) |
1740 | ret = ip6mr_mfc_delete(mrt, &mfc, parent); | |
7bc570c8 | 1741 | else |
660b26dc ND |
1742 | ret = ip6mr_mfc_add(net, mrt, &mfc, |
1743 | sk == mrt->mroute6_sk, parent); | |
7bc570c8 YH |
1744 | rtnl_unlock(); |
1745 | return ret; | |
1746 | ||
14fb64e1 YH |
1747 | /* |
1748 | * Control PIM assert (to activate pim will activate assert) | |
1749 | */ | |
1750 | case MRT6_ASSERT: | |
1751 | { | |
1752 | int v; | |
03f52a0a JP |
1753 | |
1754 | if (optlen != sizeof(v)) | |
1755 | return -EINVAL; | |
14fb64e1 YH |
1756 | if (get_user(v, (int __user *)optval)) |
1757 | return -EFAULT; | |
53d6841d | 1758 | mrt->mroute_do_assert = v; |
14fb64e1 YH |
1759 | return 0; |
1760 | } | |
1761 | ||
1762 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1763 | case MRT6_PIM: | |
1764 | { | |
a9f83bf3 | 1765 | int v; |
03f52a0a JP |
1766 | |
1767 | if (optlen != sizeof(v)) | |
1768 | return -EINVAL; | |
14fb64e1 YH |
1769 | if (get_user(v, (int __user *)optval)) |
1770 | return -EFAULT; | |
1771 | v = !!v; | |
1772 | rtnl_lock(); | |
1773 | ret = 0; | |
6bd52143 PM |
1774 | if (v != mrt->mroute_do_pim) { |
1775 | mrt->mroute_do_pim = v; | |
1776 | mrt->mroute_do_assert = v; | |
14fb64e1 YH |
1777 | } |
1778 | rtnl_unlock(); | |
1779 | return ret; | |
1780 | } | |
1781 | ||
d1db275d PM |
1782 | #endif |
1783 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
1784 | case MRT6_TABLE: | |
1785 | { | |
1786 | u32 v; | |
1787 | ||
1788 | if (optlen != sizeof(u32)) | |
1789 | return -EINVAL; | |
1790 | if (get_user(v, (u32 __user *)optval)) | |
1791 | return -EFAULT; | |
75356a81 DC |
1792 | /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
1793 | if (v != RT_TABLE_DEFAULT && v >= 100000000) | |
1794 | return -EINVAL; | |
d1db275d PM |
1795 | if (sk == mrt->mroute6_sk) |
1796 | return -EBUSY; | |
1797 | ||
1798 | rtnl_lock(); | |
1799 | ret = 0; | |
1800 | if (!ip6mr_new_table(net, v)) | |
1801 | ret = -ENOMEM; | |
4861f799 SD |
1802 | else |
1803 | raw6_sk(sk)->ip6mr_table = v; | |
d1db275d PM |
1804 | rtnl_unlock(); |
1805 | return ret; | |
1806 | } | |
14fb64e1 | 1807 | #endif |
7bc570c8 | 1808 | /* |
7d120c55 | 1809 | * Spurious command, or MRT6_VERSION which you cannot |
7bc570c8 YH |
1810 | * set. |
1811 | */ | |
1812 | default: | |
1813 | return -ENOPROTOOPT; | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | /* | |
1818 | * Getsock opt support for the multicast routing system. | |
1819 | */ | |
1820 | ||
1821 | int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, | |
1822 | int __user *optlen) | |
1823 | { | |
1824 | int olr; | |
1825 | int val; | |
8229efda | 1826 | struct net *net = sock_net(sk); |
d1db275d PM |
1827 | struct mr6_table *mrt; |
1828 | ||
99253eb7 XL |
1829 | if (sk->sk_type != SOCK_RAW || |
1830 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1831 | return -EOPNOTSUPP; | |
1832 | ||
d1db275d | 1833 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); |
63159f29 | 1834 | if (!mrt) |
d1db275d | 1835 | return -ENOENT; |
7bc570c8 YH |
1836 | |
1837 | switch (optname) { | |
1838 | case MRT6_VERSION: | |
1839 | val = 0x0305; | |
1840 | break; | |
14fb64e1 YH |
1841 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1842 | case MRT6_PIM: | |
6bd52143 | 1843 | val = mrt->mroute_do_pim; |
14fb64e1 YH |
1844 | break; |
1845 | #endif | |
1846 | case MRT6_ASSERT: | |
6bd52143 | 1847 | val = mrt->mroute_do_assert; |
14fb64e1 | 1848 | break; |
7bc570c8 YH |
1849 | default: |
1850 | return -ENOPROTOOPT; | |
1851 | } | |
1852 | ||
1853 | if (get_user(olr, optlen)) | |
1854 | return -EFAULT; | |
1855 | ||
1856 | olr = min_t(int, olr, sizeof(int)); | |
1857 | if (olr < 0) | |
1858 | return -EINVAL; | |
1859 | ||
1860 | if (put_user(olr, optlen)) | |
1861 | return -EFAULT; | |
1862 | if (copy_to_user(optval, &val, olr)) | |
1863 | return -EFAULT; | |
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | /* | |
1868 | * The IP multicast ioctl support routines. | |
1869 | */ | |
1870 | ||
1871 | int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) | |
1872 | { | |
1873 | struct sioc_sg_req6 sr; | |
1874 | struct sioc_mif_req6 vr; | |
1875 | struct mif_device *vif; | |
1876 | struct mfc6_cache *c; | |
8229efda | 1877 | struct net *net = sock_net(sk); |
d1db275d PM |
1878 | struct mr6_table *mrt; |
1879 | ||
1880 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1881 | if (!mrt) |
d1db275d | 1882 | return -ENOENT; |
7bc570c8 YH |
1883 | |
1884 | switch (cmd) { | |
1885 | case SIOCGETMIFCNT_IN6: | |
1886 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1887 | return -EFAULT; | |
6bd52143 | 1888 | if (vr.mifi >= mrt->maxvif) |
7bc570c8 YH |
1889 | return -EINVAL; |
1890 | read_lock(&mrt_lock); | |
6bd52143 PM |
1891 | vif = &mrt->vif6_table[vr.mifi]; |
1892 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
7bc570c8 YH |
1893 | vr.icount = vif->pkt_in; |
1894 | vr.ocount = vif->pkt_out; | |
1895 | vr.ibytes = vif->bytes_in; | |
1896 | vr.obytes = vif->bytes_out; | |
1897 | read_unlock(&mrt_lock); | |
1898 | ||
1899 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1900 | return -EFAULT; | |
1901 | return 0; | |
1902 | } | |
1903 | read_unlock(&mrt_lock); | |
1904 | return -EADDRNOTAVAIL; | |
1905 | case SIOCGETSGCNT_IN6: | |
1906 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1907 | return -EFAULT; | |
1908 | ||
1909 | read_lock(&mrt_lock); | |
6bd52143 | 1910 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
7bc570c8 YH |
1911 | if (c) { |
1912 | sr.pktcnt = c->mfc_un.res.pkt; | |
1913 | sr.bytecnt = c->mfc_un.res.bytes; | |
1914 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1915 | read_unlock(&mrt_lock); | |
1916 | ||
1917 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1918 | return -EFAULT; | |
1919 | return 0; | |
1920 | } | |
1921 | read_unlock(&mrt_lock); | |
1922 | return -EADDRNOTAVAIL; | |
1923 | default: | |
1924 | return -ENOIOCTLCMD; | |
1925 | } | |
1926 | } | |
1927 | ||
e2d57766 DM |
1928 | #ifdef CONFIG_COMPAT |
1929 | struct compat_sioc_sg_req6 { | |
1930 | struct sockaddr_in6 src; | |
1931 | struct sockaddr_in6 grp; | |
1932 | compat_ulong_t pktcnt; | |
1933 | compat_ulong_t bytecnt; | |
1934 | compat_ulong_t wrong_if; | |
1935 | }; | |
1936 | ||
1937 | struct compat_sioc_mif_req6 { | |
1938 | mifi_t mifi; | |
1939 | compat_ulong_t icount; | |
1940 | compat_ulong_t ocount; | |
1941 | compat_ulong_t ibytes; | |
1942 | compat_ulong_t obytes; | |
1943 | }; | |
1944 | ||
1945 | int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) | |
1946 | { | |
1947 | struct compat_sioc_sg_req6 sr; | |
1948 | struct compat_sioc_mif_req6 vr; | |
1949 | struct mif_device *vif; | |
1950 | struct mfc6_cache *c; | |
1951 | struct net *net = sock_net(sk); | |
1952 | struct mr6_table *mrt; | |
1953 | ||
1954 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1955 | if (!mrt) |
e2d57766 DM |
1956 | return -ENOENT; |
1957 | ||
1958 | switch (cmd) { | |
1959 | case SIOCGETMIFCNT_IN6: | |
1960 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1961 | return -EFAULT; | |
1962 | if (vr.mifi >= mrt->maxvif) | |
1963 | return -EINVAL; | |
1964 | read_lock(&mrt_lock); | |
1965 | vif = &mrt->vif6_table[vr.mifi]; | |
1966 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
1967 | vr.icount = vif->pkt_in; | |
1968 | vr.ocount = vif->pkt_out; | |
1969 | vr.ibytes = vif->bytes_in; | |
1970 | vr.obytes = vif->bytes_out; | |
1971 | read_unlock(&mrt_lock); | |
1972 | ||
1973 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1974 | return -EFAULT; | |
1975 | return 0; | |
1976 | } | |
1977 | read_unlock(&mrt_lock); | |
1978 | return -EADDRNOTAVAIL; | |
1979 | case SIOCGETSGCNT_IN6: | |
1980 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1981 | return -EFAULT; | |
1982 | ||
1983 | read_lock(&mrt_lock); | |
1984 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); | |
1985 | if (c) { | |
1986 | sr.pktcnt = c->mfc_un.res.pkt; | |
1987 | sr.bytecnt = c->mfc_un.res.bytes; | |
1988 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1989 | read_unlock(&mrt_lock); | |
1990 | ||
1991 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1992 | return -EFAULT; | |
1993 | return 0; | |
1994 | } | |
1995 | read_unlock(&mrt_lock); | |
1996 | return -EADDRNOTAVAIL; | |
1997 | default: | |
1998 | return -ENOIOCTLCMD; | |
1999 | } | |
2000 | } | |
2001 | #endif | |
7bc570c8 | 2002 | |
0c4b51f0 | 2003 | static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb) |
7bc570c8 | 2004 | { |
1d015503 ED |
2005 | __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), |
2006 | IPSTATS_MIB_OUTFORWDATAGRAMS); | |
2007 | __IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)), | |
2008 | IPSTATS_MIB_OUTOCTETS, skb->len); | |
13206b6b | 2009 | return dst_output(net, sk, skb); |
7bc570c8 YH |
2010 | } |
2011 | ||
2012 | /* | |
2013 | * Processing handlers for ip6mr_forward | |
2014 | */ | |
2015 | ||
6bd52143 PM |
2016 | static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, |
2017 | struct sk_buff *skb, struct mfc6_cache *c, int vifi) | |
7bc570c8 YH |
2018 | { |
2019 | struct ipv6hdr *ipv6h; | |
6bd52143 | 2020 | struct mif_device *vif = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
2021 | struct net_device *dev; |
2022 | struct dst_entry *dst; | |
4c9483b2 | 2023 | struct flowi6 fl6; |
7bc570c8 | 2024 | |
63159f29 | 2025 | if (!vif->dev) |
7bc570c8 YH |
2026 | goto out_free; |
2027 | ||
14fb64e1 YH |
2028 | #ifdef CONFIG_IPV6_PIMSM_V2 |
2029 | if (vif->flags & MIFF_REGISTER) { | |
2030 | vif->pkt_out++; | |
2031 | vif->bytes_out += skb->len; | |
dc58c78c PE |
2032 | vif->dev->stats.tx_bytes += skb->len; |
2033 | vif->dev->stats.tx_packets++; | |
6bd52143 | 2034 | ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); |
8da73b73 | 2035 | goto out_free; |
14fb64e1 YH |
2036 | } |
2037 | #endif | |
2038 | ||
7bc570c8 YH |
2039 | ipv6h = ipv6_hdr(skb); |
2040 | ||
4c9483b2 DM |
2041 | fl6 = (struct flowi6) { |
2042 | .flowi6_oif = vif->link, | |
2043 | .daddr = ipv6h->daddr, | |
7bc570c8 YH |
2044 | }; |
2045 | ||
4c9483b2 | 2046 | dst = ip6_route_output(net, NULL, &fl6); |
5095d64d RL |
2047 | if (dst->error) { |
2048 | dst_release(dst); | |
7bc570c8 | 2049 | goto out_free; |
5095d64d | 2050 | } |
7bc570c8 | 2051 | |
adf30907 ED |
2052 | skb_dst_drop(skb); |
2053 | skb_dst_set(skb, dst); | |
7bc570c8 YH |
2054 | |
2055 | /* | |
2056 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally | |
2057 | * not only before forwarding, but after forwarding on all output | |
2058 | * interfaces. It is clear, if mrouter runs a multicasting | |
2059 | * program, it should receive packets not depending to what interface | |
2060 | * program is joined. | |
2061 | * If we will not make it, the program will have to join on all | |
2062 | * interfaces. On the other hand, multihoming host (or router, but | |
2063 | * not mrouter) cannot join to more than one interface - it will | |
2064 | * result in receiving multiple packets. | |
2065 | */ | |
2066 | dev = vif->dev; | |
2067 | skb->dev = dev; | |
2068 | vif->pkt_out++; | |
2069 | vif->bytes_out += skb->len; | |
2070 | ||
2071 | /* We are about to write */ | |
2072 | /* XXX: extension headers? */ | |
2073 | if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) | |
2074 | goto out_free; | |
2075 | ||
2076 | ipv6h = ipv6_hdr(skb); | |
2077 | ipv6h->hop_limit--; | |
2078 | ||
2079 | IP6CB(skb)->flags |= IP6SKB_FORWARDED; | |
2080 | ||
29a26a56 EB |
2081 | return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, |
2082 | net, NULL, skb, skb->dev, dev, | |
7bc570c8 YH |
2083 | ip6mr_forward2_finish); |
2084 | ||
2085 | out_free: | |
2086 | kfree_skb(skb); | |
2087 | return 0; | |
2088 | } | |
2089 | ||
6bd52143 | 2090 | static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) |
7bc570c8 YH |
2091 | { |
2092 | int ct; | |
6bd52143 PM |
2093 | |
2094 | for (ct = mrt->maxvif - 1; ct >= 0; ct--) { | |
2095 | if (mrt->vif6_table[ct].dev == dev) | |
7bc570c8 YH |
2096 | break; |
2097 | } | |
2098 | return ct; | |
2099 | } | |
2100 | ||
2b52c3ad RR |
2101 | static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
2102 | struct sk_buff *skb, struct mfc6_cache *cache) | |
7bc570c8 YH |
2103 | { |
2104 | int psend = -1; | |
2105 | int vif, ct; | |
660b26dc | 2106 | int true_vifi = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 YH |
2107 | |
2108 | vif = cache->mf6c_parent; | |
2109 | cache->mfc_un.res.pkt++; | |
2110 | cache->mfc_un.res.bytes += skb->len; | |
43b9e127 | 2111 | cache->mfc_un.res.lastuse = jiffies; |
7bc570c8 | 2112 | |
660b26dc ND |
2113 | if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { |
2114 | struct mfc6_cache *cache_proxy; | |
2115 | ||
40dc2ca3 | 2116 | /* For an (*,G) entry, we only check that the incoming |
660b26dc ND |
2117 | * interface is part of the static tree. |
2118 | */ | |
2119 | cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); | |
2120 | if (cache_proxy && | |
2121 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2122 | goto forward; | |
2123 | } | |
2124 | ||
14fb64e1 YH |
2125 | /* |
2126 | * Wrong interface: drop packet and (maybe) send PIM assert. | |
2127 | */ | |
6bd52143 | 2128 | if (mrt->vif6_table[vif].dev != skb->dev) { |
14fb64e1 | 2129 | cache->mfc_un.res.wrong_if++; |
14fb64e1 | 2130 | |
6bd52143 | 2131 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
14fb64e1 YH |
2132 | /* pimsm uses asserts, when switching from RPT to SPT, |
2133 | so that we cannot check that packet arrived on an oif. | |
2134 | It is bad, but otherwise we would need to move pretty | |
2135 | large chunk of pimd to kernel. Ough... --ANK | |
2136 | */ | |
6bd52143 | 2137 | (mrt->mroute_do_pim || |
a21f3f99 | 2138 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
14fb64e1 YH |
2139 | time_after(jiffies, |
2140 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { | |
2141 | cache->mfc_un.res.last_assert = jiffies; | |
6bd52143 | 2142 | ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); |
14fb64e1 YH |
2143 | } |
2144 | goto dont_forward; | |
2145 | } | |
2146 | ||
660b26dc | 2147 | forward: |
6bd52143 PM |
2148 | mrt->vif6_table[vif].pkt_in++; |
2149 | mrt->vif6_table[vif].bytes_in += skb->len; | |
7bc570c8 YH |
2150 | |
2151 | /* | |
2152 | * Forward the frame | |
2153 | */ | |
660b26dc ND |
2154 | if (ipv6_addr_any(&cache->mf6c_origin) && |
2155 | ipv6_addr_any(&cache->mf6c_mcastgrp)) { | |
2156 | if (true_vifi >= 0 && | |
2157 | true_vifi != cache->mf6c_parent && | |
2158 | ipv6_hdr(skb)->hop_limit > | |
2159 | cache->mfc_un.res.ttls[cache->mf6c_parent]) { | |
2160 | /* It's an (*,*) entry and the packet is not coming from | |
2161 | * the upstream: forward the packet to the upstream | |
2162 | * only. | |
2163 | */ | |
2164 | psend = cache->mf6c_parent; | |
2165 | goto last_forward; | |
2166 | } | |
2167 | goto dont_forward; | |
2168 | } | |
7bc570c8 | 2169 | for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { |
660b26dc ND |
2170 | /* For (*,G) entry, don't forward to the incoming interface */ |
2171 | if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && | |
2172 | ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { | |
7bc570c8 YH |
2173 | if (psend != -1) { |
2174 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2175 | if (skb2) | |
6bd52143 | 2176 | ip6mr_forward2(net, mrt, skb2, cache, psend); |
7bc570c8 YH |
2177 | } |
2178 | psend = ct; | |
2179 | } | |
2180 | } | |
660b26dc | 2181 | last_forward: |
7bc570c8 | 2182 | if (psend != -1) { |
6bd52143 | 2183 | ip6mr_forward2(net, mrt, skb, cache, psend); |
2b52c3ad | 2184 | return; |
7bc570c8 YH |
2185 | } |
2186 | ||
14fb64e1 | 2187 | dont_forward: |
7bc570c8 | 2188 | kfree_skb(skb); |
7bc570c8 YH |
2189 | } |
2190 | ||
2191 | ||
2192 | /* | |
2193 | * Multicast packets for forwarding arrive here | |
2194 | */ | |
2195 | ||
2196 | int ip6_mr_input(struct sk_buff *skb) | |
2197 | { | |
2198 | struct mfc6_cache *cache; | |
8229efda | 2199 | struct net *net = dev_net(skb->dev); |
d1db275d | 2200 | struct mr6_table *mrt; |
4c9483b2 DM |
2201 | struct flowi6 fl6 = { |
2202 | .flowi6_iif = skb->dev->ifindex, | |
2203 | .flowi6_mark = skb->mark, | |
d1db275d PM |
2204 | }; |
2205 | int err; | |
2206 | ||
4c9483b2 | 2207 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
2015de5f BG |
2208 | if (err < 0) { |
2209 | kfree_skb(skb); | |
d1db275d | 2210 | return err; |
2015de5f | 2211 | } |
7bc570c8 YH |
2212 | |
2213 | read_lock(&mrt_lock); | |
6bd52143 | 2214 | cache = ip6mr_cache_find(mrt, |
8229efda | 2215 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
63159f29 | 2216 | if (!cache) { |
660b26dc ND |
2217 | int vif = ip6mr_find_vif(mrt, skb->dev); |
2218 | ||
2219 | if (vif >= 0) | |
2220 | cache = ip6mr_cache_find_any(mrt, | |
2221 | &ipv6_hdr(skb)->daddr, | |
2222 | vif); | |
2223 | } | |
7bc570c8 YH |
2224 | |
2225 | /* | |
2226 | * No usable cache entry | |
2227 | */ | |
63159f29 | 2228 | if (!cache) { |
7bc570c8 YH |
2229 | int vif; |
2230 | ||
6bd52143 | 2231 | vif = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 | 2232 | if (vif >= 0) { |
6bd52143 | 2233 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
7bc570c8 YH |
2234 | read_unlock(&mrt_lock); |
2235 | ||
2236 | return err; | |
2237 | } | |
2238 | read_unlock(&mrt_lock); | |
2239 | kfree_skb(skb); | |
2240 | return -ENODEV; | |
2241 | } | |
2242 | ||
6bd52143 | 2243 | ip6_mr_forward(net, mrt, skb, cache); |
7bc570c8 YH |
2244 | |
2245 | read_unlock(&mrt_lock); | |
2246 | ||
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | ||
5b285cac PM |
2251 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
2252 | struct mfc6_cache *c, struct rtmsg *rtm) | |
7bc570c8 | 2253 | { |
adfa85e4 | 2254 | struct rta_mfc_stats mfcs; |
43b9e127 NA |
2255 | struct nlattr *mp_attr; |
2256 | struct rtnexthop *nhp; | |
b5036cd4 | 2257 | unsigned long lastuse; |
43b9e127 | 2258 | int ct; |
7bc570c8 | 2259 | |
7438189b | 2260 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
1708ebc9 NA |
2261 | if (c->mf6c_parent >= MAXMIFS) { |
2262 | rtm->rtm_flags |= RTNH_F_UNRESOLVED; | |
7438189b | 2263 | return -ENOENT; |
1708ebc9 | 2264 | } |
7438189b | 2265 | |
74a0bd7d TG |
2266 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
2267 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) | |
2268 | return -EMSGSIZE; | |
70b386a0 | 2269 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
63159f29 | 2270 | if (!mp_attr) |
70b386a0 | 2271 | return -EMSGSIZE; |
7bc570c8 YH |
2272 | |
2273 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
6bd52143 | 2274 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
70b386a0 | 2275 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
63159f29 | 2276 | if (!nhp) { |
70b386a0 ND |
2277 | nla_nest_cancel(skb, mp_attr); |
2278 | return -EMSGSIZE; | |
2279 | } | |
2280 | ||
7bc570c8 YH |
2281 | nhp->rtnh_flags = 0; |
2282 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
6bd52143 | 2283 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
7bc570c8 YH |
2284 | nhp->rtnh_len = sizeof(*nhp); |
2285 | } | |
2286 | } | |
70b386a0 ND |
2287 | |
2288 | nla_nest_end(skb, mp_attr); | |
2289 | ||
b5036cd4 NA |
2290 | lastuse = READ_ONCE(c->mfc_un.res.lastuse); |
2291 | lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0; | |
2292 | ||
adfa85e4 ND |
2293 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2294 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2295 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
43b9e127 | 2296 | if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) || |
b5036cd4 | 2297 | nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse), |
43b9e127 | 2298 | RTA_PAD)) |
adfa85e4 ND |
2299 | return -EMSGSIZE; |
2300 | ||
7bc570c8 YH |
2301 | rtm->rtm_type = RTN_MULTICAST; |
2302 | return 1; | |
7bc570c8 YH |
2303 | } |
2304 | ||
2cf75070 | 2305 | int ip6mr_get_route(struct net *net, struct sk_buff *skb, struct rtmsg *rtm, |
fd61c6ba | 2306 | u32 portid) |
7bc570c8 YH |
2307 | { |
2308 | int err; | |
d1db275d | 2309 | struct mr6_table *mrt; |
7bc570c8 | 2310 | struct mfc6_cache *cache; |
adf30907 | 2311 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
7bc570c8 | 2312 | |
d1db275d | 2313 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 2314 | if (!mrt) |
d1db275d PM |
2315 | return -ENOENT; |
2316 | ||
7bc570c8 | 2317 | read_lock(&mrt_lock); |
6bd52143 | 2318 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
660b26dc ND |
2319 | if (!cache && skb->dev) { |
2320 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2321 | ||
2322 | if (vif >= 0) | |
2323 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, | |
2324 | vif); | |
2325 | } | |
7bc570c8 YH |
2326 | |
2327 | if (!cache) { | |
2328 | struct sk_buff *skb2; | |
2329 | struct ipv6hdr *iph; | |
2330 | struct net_device *dev; | |
2331 | int vif; | |
2332 | ||
7bc570c8 | 2333 | dev = skb->dev; |
63159f29 | 2334 | if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
7bc570c8 YH |
2335 | read_unlock(&mrt_lock); |
2336 | return -ENODEV; | |
2337 | } | |
2338 | ||
2339 | /* really correct? */ | |
2340 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
2341 | if (!skb2) { | |
2342 | read_unlock(&mrt_lock); | |
2343 | return -ENOMEM; | |
2344 | } | |
2345 | ||
2cf75070 | 2346 | NETLINK_CB(skb2).portid = portid; |
7bc570c8 YH |
2347 | skb_reset_transport_header(skb2); |
2348 | ||
2349 | skb_put(skb2, sizeof(struct ipv6hdr)); | |
2350 | skb_reset_network_header(skb2); | |
2351 | ||
2352 | iph = ipv6_hdr(skb2); | |
2353 | iph->version = 0; | |
2354 | iph->priority = 0; | |
2355 | iph->flow_lbl[0] = 0; | |
2356 | iph->flow_lbl[1] = 0; | |
2357 | iph->flow_lbl[2] = 0; | |
2358 | iph->payload_len = 0; | |
2359 | iph->nexthdr = IPPROTO_NONE; | |
2360 | iph->hop_limit = 0; | |
4e3fd7a0 AD |
2361 | iph->saddr = rt->rt6i_src.addr; |
2362 | iph->daddr = rt->rt6i_dst.addr; | |
7bc570c8 | 2363 | |
6bd52143 | 2364 | err = ip6mr_cache_unresolved(mrt, vif, skb2); |
7bc570c8 YH |
2365 | read_unlock(&mrt_lock); |
2366 | ||
2367 | return err; | |
2368 | } | |
2369 | ||
fd61c6ba | 2370 | if (rtm->rtm_flags & RTM_F_NOTIFY) |
7bc570c8 YH |
2371 | cache->mfc_flags |= MFC_NOTIFY; |
2372 | ||
5b285cac | 2373 | err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); |
7bc570c8 YH |
2374 | read_unlock(&mrt_lock); |
2375 | return err; | |
2376 | } | |
2377 | ||
5b285cac | 2378 | static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
f518338b ND |
2379 | u32 portid, u32 seq, struct mfc6_cache *c, int cmd, |
2380 | int flags) | |
5b285cac PM |
2381 | { |
2382 | struct nlmsghdr *nlh; | |
2383 | struct rtmsg *rtm; | |
1eb99af5 | 2384 | int err; |
5b285cac | 2385 | |
f518338b | 2386 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
63159f29 | 2387 | if (!nlh) |
5b285cac PM |
2388 | return -EMSGSIZE; |
2389 | ||
2390 | rtm = nlmsg_data(nlh); | |
193c1e47 | 2391 | rtm->rtm_family = RTNL_FAMILY_IP6MR; |
5b285cac PM |
2392 | rtm->rtm_dst_len = 128; |
2393 | rtm->rtm_src_len = 128; | |
2394 | rtm->rtm_tos = 0; | |
2395 | rtm->rtm_table = mrt->id; | |
c78679e8 DM |
2396 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2397 | goto nla_put_failure; | |
1eb99af5 | 2398 | rtm->rtm_type = RTN_MULTICAST; |
5b285cac | 2399 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
9a68ac72 ND |
2400 | if (c->mfc_flags & MFC_STATIC) |
2401 | rtm->rtm_protocol = RTPROT_STATIC; | |
2402 | else | |
2403 | rtm->rtm_protocol = RTPROT_MROUTED; | |
5b285cac PM |
2404 | rtm->rtm_flags = 0; |
2405 | ||
930345ea JB |
2406 | if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) || |
2407 | nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp)) | |
c78679e8 | 2408 | goto nla_put_failure; |
1eb99af5 ND |
2409 | err = __ip6mr_fill_mroute(mrt, skb, c, rtm); |
2410 | /* do not break the dump if cache is unresolved */ | |
2411 | if (err < 0 && err != -ENOENT) | |
5b285cac PM |
2412 | goto nla_put_failure; |
2413 | ||
053c095a JB |
2414 | nlmsg_end(skb, nlh); |
2415 | return 0; | |
5b285cac PM |
2416 | |
2417 | nla_put_failure: | |
2418 | nlmsg_cancel(skb, nlh); | |
2419 | return -EMSGSIZE; | |
2420 | } | |
2421 | ||
812e44dd ND |
2422 | static int mr6_msgsize(bool unresolved, int maxvif) |
2423 | { | |
2424 | size_t len = | |
2425 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2426 | + nla_total_size(4) /* RTA_TABLE */ | |
2427 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ | |
2428 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ | |
2429 | ; | |
2430 | ||
2431 | if (!unresolved) | |
2432 | len = len | |
2433 | + nla_total_size(4) /* RTA_IIF */ | |
2434 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2435 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2436 | /* RTA_MFC_STATS */ | |
3d6b66c1 | 2437 | + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) |
812e44dd ND |
2438 | ; |
2439 | ||
2440 | return len; | |
2441 | } | |
2442 | ||
2443 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, | |
2444 | int cmd) | |
2445 | { | |
2446 | struct net *net = read_pnet(&mrt->net); | |
2447 | struct sk_buff *skb; | |
2448 | int err = -ENOBUFS; | |
2449 | ||
2450 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), | |
2451 | GFP_ATOMIC); | |
63159f29 | 2452 | if (!skb) |
812e44dd ND |
2453 | goto errout; |
2454 | ||
f518338b | 2455 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
812e44dd ND |
2456 | if (err < 0) |
2457 | goto errout; | |
2458 | ||
2459 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); | |
2460 | return; | |
2461 | ||
2462 | errout: | |
2463 | kfree_skb(skb); | |
2464 | if (err < 0) | |
2465 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); | |
2466 | } | |
2467 | ||
dd12d15c JG |
2468 | static size_t mrt6msg_netlink_msgsize(size_t payloadlen) |
2469 | { | |
2470 | size_t len = | |
2471 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) | |
2472 | + nla_total_size(1) /* IP6MRA_CREPORT_MSGTYPE */ | |
2473 | + nla_total_size(4) /* IP6MRA_CREPORT_MIF_ID */ | |
2474 | /* IP6MRA_CREPORT_SRC_ADDR */ | |
2475 | + nla_total_size(sizeof(struct in6_addr)) | |
2476 | /* IP6MRA_CREPORT_DST_ADDR */ | |
2477 | + nla_total_size(sizeof(struct in6_addr)) | |
2478 | /* IP6MRA_CREPORT_PKT */ | |
2479 | + nla_total_size(payloadlen) | |
2480 | ; | |
2481 | ||
2482 | return len; | |
2483 | } | |
2484 | ||
2485 | static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt) | |
2486 | { | |
2487 | struct net *net = read_pnet(&mrt->net); | |
2488 | struct nlmsghdr *nlh; | |
2489 | struct rtgenmsg *rtgenm; | |
2490 | struct mrt6msg *msg; | |
2491 | struct sk_buff *skb; | |
2492 | struct nlattr *nla; | |
2493 | int payloadlen; | |
2494 | ||
2495 | payloadlen = pkt->len - sizeof(struct mrt6msg); | |
2496 | msg = (struct mrt6msg *)skb_transport_header(pkt); | |
2497 | ||
2498 | skb = nlmsg_new(mrt6msg_netlink_msgsize(payloadlen), GFP_ATOMIC); | |
2499 | if (!skb) | |
2500 | goto errout; | |
2501 | ||
2502 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWCACHEREPORT, | |
2503 | sizeof(struct rtgenmsg), 0); | |
2504 | if (!nlh) | |
2505 | goto errout; | |
2506 | rtgenm = nlmsg_data(nlh); | |
2507 | rtgenm->rtgen_family = RTNL_FAMILY_IP6MR; | |
2508 | if (nla_put_u8(skb, IP6MRA_CREPORT_MSGTYPE, msg->im6_msgtype) || | |
2509 | nla_put_u32(skb, IP6MRA_CREPORT_MIF_ID, msg->im6_mif) || | |
2510 | nla_put_in6_addr(skb, IP6MRA_CREPORT_SRC_ADDR, | |
2511 | &msg->im6_src) || | |
2512 | nla_put_in6_addr(skb, IP6MRA_CREPORT_DST_ADDR, | |
2513 | &msg->im6_dst)) | |
2514 | goto nla_put_failure; | |
2515 | ||
2516 | nla = nla_reserve(skb, IP6MRA_CREPORT_PKT, payloadlen); | |
2517 | if (!nla || skb_copy_bits(pkt, sizeof(struct mrt6msg), | |
2518 | nla_data(nla), payloadlen)) | |
2519 | goto nla_put_failure; | |
2520 | ||
2521 | nlmsg_end(skb, nlh); | |
2522 | ||
2523 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE_R, NULL, GFP_ATOMIC); | |
2524 | return; | |
2525 | ||
2526 | nla_put_failure: | |
2527 | nlmsg_cancel(skb, nlh); | |
2528 | errout: | |
2529 | kfree_skb(skb); | |
2530 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE_R, -ENOBUFS); | |
2531 | } | |
2532 | ||
5b285cac PM |
2533 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2534 | { | |
2535 | struct net *net = sock_net(skb->sk); | |
2536 | struct mr6_table *mrt; | |
2537 | struct mfc6_cache *mfc; | |
2538 | unsigned int t = 0, s_t; | |
2539 | unsigned int h = 0, s_h; | |
2540 | unsigned int e = 0, s_e; | |
2541 | ||
2542 | s_t = cb->args[0]; | |
2543 | s_h = cb->args[1]; | |
2544 | s_e = cb->args[2]; | |
2545 | ||
2546 | read_lock(&mrt_lock); | |
2547 | ip6mr_for_each_table(mrt, net) { | |
2548 | if (t < s_t) | |
2549 | goto next_table; | |
2550 | if (t > s_t) | |
2551 | s_h = 0; | |
2552 | for (h = s_h; h < MFC6_LINES; h++) { | |
2553 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { | |
2554 | if (e < s_e) | |
2555 | goto next_entry; | |
2556 | if (ip6mr_fill_mroute(mrt, skb, | |
15e47304 | 2557 | NETLINK_CB(cb->skb).portid, |
5b285cac | 2558 | cb->nlh->nlmsg_seq, |
f518338b ND |
2559 | mfc, RTM_NEWROUTE, |
2560 | NLM_F_MULTI) < 0) | |
5b285cac PM |
2561 | goto done; |
2562 | next_entry: | |
2563 | e++; | |
2564 | } | |
2565 | e = s_e = 0; | |
2566 | } | |
1eb99af5 ND |
2567 | spin_lock_bh(&mfc_unres_lock); |
2568 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { | |
2569 | if (e < s_e) | |
2570 | goto next_entry2; | |
2571 | if (ip6mr_fill_mroute(mrt, skb, | |
2572 | NETLINK_CB(cb->skb).portid, | |
2573 | cb->nlh->nlmsg_seq, | |
f518338b ND |
2574 | mfc, RTM_NEWROUTE, |
2575 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2576 | spin_unlock_bh(&mfc_unres_lock); |
2577 | goto done; | |
2578 | } | |
2579 | next_entry2: | |
2580 | e++; | |
2581 | } | |
2582 | spin_unlock_bh(&mfc_unres_lock); | |
2583 | e = s_e = 0; | |
5b285cac PM |
2584 | s_h = 0; |
2585 | next_table: | |
2586 | t++; | |
2587 | } | |
2588 | done: | |
2589 | read_unlock(&mrt_lock); | |
2590 | ||
2591 | cb->args[2] = e; | |
2592 | cb->args[1] = h; | |
2593 | cb->args[0] = t; | |
2594 | ||
2595 | return skb->len; | |
2596 | } |