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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 | ||
7bc570c8 YH |
19 | #include <asm/uaccess.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/fcntl.h> | |
27 | #include <linux/stat.h> | |
28 | #include <linux/socket.h> | |
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); | |
5b285cac PM |
119 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, |
120 | struct netlink_callback *cb); | |
4c698046 | 121 | static void mroute_clean_tables(struct mr6_table *mrt, bool all); |
d1db275d PM |
122 | static void ipmr_expire_process(unsigned long arg); |
123 | ||
124 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
8ffb335e | 125 | #define ip6mr_for_each_table(mrt, net) \ |
d1db275d PM |
126 | list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) |
127 | ||
128 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
129 | { | |
130 | struct mr6_table *mrt; | |
131 | ||
132 | ip6mr_for_each_table(mrt, net) { | |
133 | if (mrt->id == id) | |
134 | return mrt; | |
135 | } | |
136 | return NULL; | |
137 | } | |
138 | ||
4c9483b2 | 139 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
140 | struct mr6_table **mrt) |
141 | { | |
d1db275d | 142 | int err; |
95f4a45d HFS |
143 | struct ip6mr_result res; |
144 | struct fib_lookup_arg arg = { | |
145 | .result = &res, | |
146 | .flags = FIB_LOOKUP_NOREF, | |
147 | }; | |
d1db275d | 148 | |
4c9483b2 DM |
149 | err = fib_rules_lookup(net->ipv6.mr6_rules_ops, |
150 | flowi6_to_flowi(flp6), 0, &arg); | |
d1db275d PM |
151 | if (err < 0) |
152 | return err; | |
153 | *mrt = res.mrt; | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
158 | int flags, struct fib_lookup_arg *arg) | |
159 | { | |
160 | struct ip6mr_result *res = arg->result; | |
161 | struct mr6_table *mrt; | |
162 | ||
163 | switch (rule->action) { | |
164 | case FR_ACT_TO_TBL: | |
165 | break; | |
166 | case FR_ACT_UNREACHABLE: | |
167 | return -ENETUNREACH; | |
168 | case FR_ACT_PROHIBIT: | |
169 | return -EACCES; | |
170 | case FR_ACT_BLACKHOLE: | |
171 | default: | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | mrt = ip6mr_get_table(rule->fr_net, rule->table); | |
63159f29 | 176 | if (!mrt) |
d1db275d PM |
177 | return -EAGAIN; |
178 | res->mrt = mrt; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) | |
183 | { | |
184 | return 1; | |
185 | } | |
186 | ||
187 | static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { | |
188 | FRA_GENERIC_POLICY, | |
189 | }; | |
190 | ||
191 | static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
192 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
198 | struct nlattr **tb) | |
199 | { | |
200 | return 1; | |
201 | } | |
202 | ||
203 | static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
204 | struct fib_rule_hdr *frh) | |
205 | { | |
206 | frh->dst_len = 0; | |
207 | frh->src_len = 0; | |
208 | frh->tos = 0; | |
209 | return 0; | |
210 | } | |
211 | ||
04a6f82c | 212 | static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { |
d1db275d PM |
213 | .family = RTNL_FAMILY_IP6MR, |
214 | .rule_size = sizeof(struct ip6mr_rule), | |
215 | .addr_size = sizeof(struct in6_addr), | |
216 | .action = ip6mr_rule_action, | |
217 | .match = ip6mr_rule_match, | |
218 | .configure = ip6mr_rule_configure, | |
219 | .compare = ip6mr_rule_compare, | |
d1db275d PM |
220 | .fill = ip6mr_rule_fill, |
221 | .nlgroup = RTNLGRP_IPV6_RULE, | |
222 | .policy = ip6mr_rule_policy, | |
223 | .owner = THIS_MODULE, | |
224 | }; | |
225 | ||
226 | static int __net_init ip6mr_rules_init(struct net *net) | |
227 | { | |
228 | struct fib_rules_ops *ops; | |
229 | struct mr6_table *mrt; | |
230 | int err; | |
231 | ||
232 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); | |
233 | if (IS_ERR(ops)) | |
234 | return PTR_ERR(ops); | |
235 | ||
236 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); | |
237 | ||
238 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
63159f29 | 239 | if (!mrt) { |
d1db275d PM |
240 | err = -ENOMEM; |
241 | goto err1; | |
242 | } | |
243 | ||
244 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); | |
245 | if (err < 0) | |
246 | goto err2; | |
247 | ||
248 | net->ipv6.mr6_rules_ops = ops; | |
249 | return 0; | |
250 | ||
251 | err2: | |
f243e5a7 | 252 | ip6mr_free_table(mrt); |
d1db275d PM |
253 | err1: |
254 | fib_rules_unregister(ops); | |
255 | return err; | |
256 | } | |
257 | ||
258 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
259 | { | |
260 | struct mr6_table *mrt, *next; | |
261 | ||
905a6f96 | 262 | rtnl_lock(); |
035320d5 ED |
263 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
264 | list_del(&mrt->list); | |
d1db275d | 265 | ip6mr_free_table(mrt); |
035320d5 | 266 | } |
d1db275d | 267 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
419df12f | 268 | rtnl_unlock(); |
d1db275d PM |
269 | } |
270 | #else | |
271 | #define ip6mr_for_each_table(mrt, net) \ | |
272 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) | |
273 | ||
274 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
275 | { | |
276 | return net->ipv6.mrt6; | |
277 | } | |
278 | ||
4c9483b2 | 279 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
280 | struct mr6_table **mrt) |
281 | { | |
282 | *mrt = net->ipv6.mrt6; | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static int __net_init ip6mr_rules_init(struct net *net) | |
287 | { | |
288 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
289 | return net->ipv6.mrt6 ? 0 : -ENOMEM; | |
290 | } | |
291 | ||
292 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
293 | { | |
905a6f96 | 294 | rtnl_lock(); |
d1db275d | 295 | ip6mr_free_table(net->ipv6.mrt6); |
905a6f96 HFS |
296 | net->ipv6.mrt6 = NULL; |
297 | rtnl_unlock(); | |
d1db275d PM |
298 | } |
299 | #endif | |
300 | ||
301 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) | |
302 | { | |
303 | struct mr6_table *mrt; | |
304 | unsigned int i; | |
305 | ||
306 | mrt = ip6mr_get_table(net, id); | |
53b24b8f | 307 | if (mrt) |
d1db275d PM |
308 | return mrt; |
309 | ||
310 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
63159f29 | 311 | if (!mrt) |
d1db275d PM |
312 | return NULL; |
313 | mrt->id = id; | |
314 | write_pnet(&mrt->net, net); | |
315 | ||
316 | /* Forwarding cache */ | |
317 | for (i = 0; i < MFC6_LINES; i++) | |
318 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); | |
319 | ||
320 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); | |
321 | ||
322 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, | |
323 | (unsigned long)mrt); | |
324 | ||
325 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
326 | mrt->mroute_reg_vif_num = -1; | |
327 | #endif | |
328 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
329 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); | |
330 | #endif | |
331 | return mrt; | |
332 | } | |
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; | |
8b90fc7e BT |
498 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
499 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
500 | } |
501 | ||
502 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
503 | { | |
504 | struct mfc6_cache *mfc = v; | |
505 | struct ipmr_mfc_iter *it = seq->private; | |
8b90fc7e | 506 | struct net *net = seq_file_net(seq); |
d1db275d | 507 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
508 | |
509 | ++*pos; | |
510 | ||
511 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 512 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
7bc570c8 | 513 | |
f30a7784 PM |
514 | if (mfc->list.next != it->cache) |
515 | return list_entry(mfc->list.next, struct mfc6_cache, list); | |
7bc570c8 | 516 | |
6bd52143 | 517 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 YH |
518 | goto end_of_list; |
519 | ||
6bd52143 | 520 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
7bc570c8 | 521 | |
4a6258a0 | 522 | while (++it->ct < MFC6_LINES) { |
6bd52143 | 523 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 PM |
524 | if (list_empty(it->cache)) |
525 | continue; | |
526 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
527 | } |
528 | ||
529 | /* exhausted cache_array, show unresolved */ | |
530 | read_unlock(&mrt_lock); | |
6bd52143 | 531 | it->cache = &mrt->mfc6_unres_queue; |
7bc570c8 YH |
532 | it->ct = 0; |
533 | ||
534 | spin_lock_bh(&mfc_unres_lock); | |
f30a7784 PM |
535 | if (!list_empty(it->cache)) |
536 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
537 | |
538 | end_of_list: | |
539 | spin_unlock_bh(&mfc_unres_lock); | |
540 | it->cache = NULL; | |
541 | ||
542 | return NULL; | |
543 | } | |
544 | ||
545 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
546 | { | |
547 | struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 548 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 549 | |
6bd52143 | 550 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 | 551 | spin_unlock_bh(&mfc_unres_lock); |
25b4a44c | 552 | else if (it->cache == &mrt->mfc6_cache_array[it->ct]) |
7bc570c8 YH |
553 | read_unlock(&mrt_lock); |
554 | } | |
555 | ||
556 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
557 | { | |
558 | int n; | |
559 | ||
560 | if (v == SEQ_START_TOKEN) { | |
561 | seq_puts(seq, | |
562 | "Group " | |
563 | "Origin " | |
564 | "Iif Pkts Bytes Wrong Oifs\n"); | |
565 | } else { | |
566 | const struct mfc6_cache *mfc = v; | |
567 | const struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 568 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 569 | |
999890b2 | 570 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
0c6ce78a | 571 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
1ea472e2 | 572 | mfc->mf6c_parent); |
7bc570c8 | 573 | |
6bd52143 | 574 | if (it->cache != &mrt->mfc6_unres_queue) { |
1ea472e2 BT |
575 | seq_printf(seq, " %8lu %8lu %8lu", |
576 | mfc->mfc_un.res.pkt, | |
577 | mfc->mfc_un.res.bytes, | |
578 | mfc->mfc_un.res.wrong_if); | |
7bc570c8 YH |
579 | for (n = mfc->mfc_un.res.minvif; |
580 | n < mfc->mfc_un.res.maxvif; n++) { | |
6bd52143 | 581 | if (MIF_EXISTS(mrt, n) && |
7bc570c8 YH |
582 | mfc->mfc_un.res.ttls[n] < 255) |
583 | seq_printf(seq, | |
584 | " %2d:%-3d", | |
585 | n, mfc->mfc_un.res.ttls[n]); | |
586 | } | |
1ea472e2 BT |
587 | } else { |
588 | /* unresolved mfc_caches don't contain | |
589 | * pkt, bytes and wrong_if values | |
590 | */ | |
591 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
7bc570c8 YH |
592 | } |
593 | seq_putc(seq, '\n'); | |
594 | } | |
595 | return 0; | |
596 | } | |
597 | ||
88e9d34c | 598 | static const struct seq_operations ipmr_mfc_seq_ops = { |
7bc570c8 YH |
599 | .start = ipmr_mfc_seq_start, |
600 | .next = ipmr_mfc_seq_next, | |
601 | .stop = ipmr_mfc_seq_stop, | |
602 | .show = ipmr_mfc_seq_show, | |
603 | }; | |
604 | ||
605 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
606 | { | |
8b90fc7e BT |
607 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
608 | sizeof(struct ipmr_mfc_iter)); | |
7bc570c8 YH |
609 | } |
610 | ||
5ca1b998 | 611 | static const struct file_operations ip6mr_mfc_fops = { |
7bc570c8 YH |
612 | .owner = THIS_MODULE, |
613 | .open = ipmr_mfc_open, | |
614 | .read = seq_read, | |
615 | .llseek = seq_lseek, | |
8b90fc7e | 616 | .release = seq_release_net, |
7bc570c8 YH |
617 | }; |
618 | #endif | |
619 | ||
14fb64e1 | 620 | #ifdef CONFIG_IPV6_PIMSM_V2 |
14fb64e1 YH |
621 | |
622 | static int pim6_rcv(struct sk_buff *skb) | |
623 | { | |
624 | struct pimreghdr *pim; | |
625 | struct ipv6hdr *encap; | |
626 | struct net_device *reg_dev = NULL; | |
8229efda | 627 | struct net *net = dev_net(skb->dev); |
d1db275d | 628 | struct mr6_table *mrt; |
4c9483b2 DM |
629 | struct flowi6 fl6 = { |
630 | .flowi6_iif = skb->dev->ifindex, | |
631 | .flowi6_mark = skb->mark, | |
d1db275d PM |
632 | }; |
633 | int reg_vif_num; | |
14fb64e1 YH |
634 | |
635 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) | |
636 | goto drop; | |
637 | ||
638 | pim = (struct pimreghdr *)skb_transport_header(skb); | |
639 | if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) || | |
640 | (pim->flags & PIM_NULL_REGISTER) || | |
1d6e55f1 TG |
641 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
642 | sizeof(*pim), IPPROTO_PIM, | |
643 | csum_partial((void *)pim, sizeof(*pim), 0)) && | |
ec6b486f | 644 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
14fb64e1 YH |
645 | goto drop; |
646 | ||
647 | /* check if the inner packet is destined to mcast group */ | |
648 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + | |
649 | sizeof(*pim)); | |
650 | ||
651 | if (!ipv6_addr_is_multicast(&encap->daddr) || | |
652 | encap->payload_len == 0 || | |
653 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) | |
654 | goto drop; | |
655 | ||
4c9483b2 | 656 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d PM |
657 | goto drop; |
658 | reg_vif_num = mrt->mroute_reg_vif_num; | |
659 | ||
14fb64e1 YH |
660 | read_lock(&mrt_lock); |
661 | if (reg_vif_num >= 0) | |
6bd52143 | 662 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
14fb64e1 YH |
663 | if (reg_dev) |
664 | dev_hold(reg_dev); | |
665 | read_unlock(&mrt_lock); | |
666 | ||
63159f29 | 667 | if (!reg_dev) |
14fb64e1 YH |
668 | goto drop; |
669 | ||
670 | skb->mac_header = skb->network_header; | |
671 | skb_pull(skb, (u8 *)encap - skb->data); | |
672 | skb_reset_network_header(skb); | |
1d6e55f1 | 673 | skb->protocol = htons(ETH_P_IPV6); |
3e49e6d5 | 674 | skb->ip_summed = CHECKSUM_NONE; |
d19d56dd | 675 | |
ea23192e | 676 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); |
d19d56dd | 677 | |
caf586e5 | 678 | netif_rx(skb); |
8990f468 | 679 | |
14fb64e1 YH |
680 | dev_put(reg_dev); |
681 | return 0; | |
682 | drop: | |
683 | kfree_skb(skb); | |
684 | return 0; | |
685 | } | |
686 | ||
41135cc8 | 687 | static const struct inet6_protocol pim6_protocol = { |
14fb64e1 YH |
688 | .handler = pim6_rcv, |
689 | }; | |
690 | ||
691 | /* Service routines creating virtual interfaces: PIMREG */ | |
692 | ||
6fef4c0c SH |
693 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
694 | struct net_device *dev) | |
14fb64e1 | 695 | { |
8229efda | 696 | struct net *net = dev_net(dev); |
d1db275d | 697 | struct mr6_table *mrt; |
4c9483b2 DM |
698 | struct flowi6 fl6 = { |
699 | .flowi6_oif = dev->ifindex, | |
6a662719 | 700 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 | 701 | .flowi6_mark = skb->mark, |
d1db275d PM |
702 | }; |
703 | int err; | |
704 | ||
4c9483b2 | 705 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
67928c40 BG |
706 | if (err < 0) { |
707 | kfree_skb(skb); | |
d1db275d | 708 | return err; |
67928c40 | 709 | } |
8229efda | 710 | |
14fb64e1 | 711 | read_lock(&mrt_lock); |
dc58c78c PE |
712 | dev->stats.tx_bytes += skb->len; |
713 | dev->stats.tx_packets++; | |
6bd52143 | 714 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
14fb64e1 YH |
715 | read_unlock(&mrt_lock); |
716 | kfree_skb(skb); | |
6ed10654 | 717 | return NETDEV_TX_OK; |
14fb64e1 YH |
718 | } |
719 | ||
ee9b9596 ND |
720 | static int reg_vif_get_iflink(const struct net_device *dev) |
721 | { | |
722 | return 0; | |
723 | } | |
724 | ||
007c3838 SH |
725 | static const struct net_device_ops reg_vif_netdev_ops = { |
726 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 727 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
728 | }; |
729 | ||
14fb64e1 YH |
730 | static void reg_vif_setup(struct net_device *dev) |
731 | { | |
732 | dev->type = ARPHRD_PIMREG; | |
733 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; | |
734 | dev->flags = IFF_NOARP; | |
007c3838 | 735 | dev->netdev_ops = ®_vif_netdev_ops; |
14fb64e1 | 736 | dev->destructor = free_netdev; |
403dbb97 | 737 | dev->features |= NETIF_F_NETNS_LOCAL; |
14fb64e1 YH |
738 | } |
739 | ||
d1db275d | 740 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
14fb64e1 YH |
741 | { |
742 | struct net_device *dev; | |
d1db275d PM |
743 | char name[IFNAMSIZ]; |
744 | ||
745 | if (mrt->id == RT6_TABLE_DFLT) | |
746 | sprintf(name, "pim6reg"); | |
747 | else | |
748 | sprintf(name, "pim6reg%u", mrt->id); | |
14fb64e1 | 749 | |
c835a677 | 750 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
63159f29 | 751 | if (!dev) |
14fb64e1 YH |
752 | return NULL; |
753 | ||
8229efda BT |
754 | dev_net_set(dev, net); |
755 | ||
14fb64e1 YH |
756 | if (register_netdevice(dev)) { |
757 | free_netdev(dev); | |
758 | return NULL; | |
759 | } | |
14fb64e1 | 760 | |
14fb64e1 YH |
761 | if (dev_open(dev)) |
762 | goto failure; | |
763 | ||
7af3db78 | 764 | dev_hold(dev); |
14fb64e1 YH |
765 | return dev; |
766 | ||
767 | failure: | |
14fb64e1 YH |
768 | unregister_netdevice(dev); |
769 | return NULL; | |
770 | } | |
771 | #endif | |
772 | ||
7bc570c8 YH |
773 | /* |
774 | * Delete a VIF entry | |
775 | */ | |
776 | ||
6bd52143 | 777 | static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head) |
7bc570c8 YH |
778 | { |
779 | struct mif_device *v; | |
780 | struct net_device *dev; | |
1d6e55f1 | 781 | struct inet6_dev *in6_dev; |
6bd52143 PM |
782 | |
783 | if (vifi < 0 || vifi >= mrt->maxvif) | |
7bc570c8 YH |
784 | return -EADDRNOTAVAIL; |
785 | ||
6bd52143 | 786 | v = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
787 | |
788 | write_lock_bh(&mrt_lock); | |
789 | dev = v->dev; | |
790 | v->dev = NULL; | |
791 | ||
792 | if (!dev) { | |
793 | write_unlock_bh(&mrt_lock); | |
794 | return -EADDRNOTAVAIL; | |
795 | } | |
796 | ||
14fb64e1 | 797 | #ifdef CONFIG_IPV6_PIMSM_V2 |
6bd52143 PM |
798 | if (vifi == mrt->mroute_reg_vif_num) |
799 | mrt->mroute_reg_vif_num = -1; | |
14fb64e1 YH |
800 | #endif |
801 | ||
6bd52143 | 802 | if (vifi + 1 == mrt->maxvif) { |
7bc570c8 YH |
803 | int tmp; |
804 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
6bd52143 | 805 | if (MIF_EXISTS(mrt, tmp)) |
7bc570c8 YH |
806 | break; |
807 | } | |
6bd52143 | 808 | mrt->maxvif = tmp + 1; |
7bc570c8 YH |
809 | } |
810 | ||
811 | write_unlock_bh(&mrt_lock); | |
812 | ||
813 | dev_set_allmulti(dev, -1); | |
814 | ||
1d6e55f1 | 815 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 816 | if (in6_dev) { |
1d6e55f1 | 817 | in6_dev->cnf.mc_forwarding--; |
d67b8c61 ND |
818 | inet6_netconf_notify_devconf(dev_net(dev), |
819 | NETCONFA_MC_FORWARDING, | |
820 | dev->ifindex, &in6_dev->cnf); | |
821 | } | |
1d6e55f1 | 822 | |
7bc570c8 | 823 | if (v->flags & MIFF_REGISTER) |
c871e664 | 824 | unregister_netdevice_queue(dev, head); |
7bc570c8 YH |
825 | |
826 | dev_put(dev); | |
827 | return 0; | |
828 | } | |
829 | ||
58701ad4 BT |
830 | static inline void ip6mr_cache_free(struct mfc6_cache *c) |
831 | { | |
58701ad4 BT |
832 | kmem_cache_free(mrt_cachep, c); |
833 | } | |
834 | ||
7bc570c8 YH |
835 | /* Destroy an unresolved cache entry, killing queued skbs |
836 | and reporting error to netlink readers. | |
837 | */ | |
838 | ||
6bd52143 | 839 | static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) |
7bc570c8 | 840 | { |
6bd52143 | 841 | struct net *net = read_pnet(&mrt->net); |
7bc570c8 YH |
842 | struct sk_buff *skb; |
843 | ||
6bd52143 | 844 | atomic_dec(&mrt->cache_resolve_queue_len); |
7bc570c8 | 845 | |
67ba4152 | 846 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { |
7bc570c8 YH |
847 | if (ipv6_hdr(skb)->version == 0) { |
848 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); | |
849 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 850 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 851 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 852 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; |
15e47304 | 853 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 YH |
854 | } else |
855 | kfree_skb(skb); | |
856 | } | |
857 | ||
58701ad4 | 858 | ip6mr_cache_free(c); |
7bc570c8 YH |
859 | } |
860 | ||
861 | ||
c476efbc | 862 | /* Timer process for all the unresolved queue. */ |
7bc570c8 | 863 | |
6bd52143 | 864 | static void ipmr_do_expire_process(struct mr6_table *mrt) |
7bc570c8 YH |
865 | { |
866 | unsigned long now = jiffies; | |
867 | unsigned long expires = 10 * HZ; | |
f30a7784 | 868 | struct mfc6_cache *c, *next; |
7bc570c8 | 869 | |
6bd52143 | 870 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
7bc570c8 YH |
871 | if (time_after(c->mfc_un.unres.expires, now)) { |
872 | /* not yet... */ | |
873 | unsigned long interval = c->mfc_un.unres.expires - now; | |
874 | if (interval < expires) | |
875 | expires = interval; | |
7bc570c8 YH |
876 | continue; |
877 | } | |
878 | ||
f30a7784 | 879 | list_del(&c->list); |
812e44dd | 880 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 881 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
882 | } |
883 | ||
6bd52143 PM |
884 | if (!list_empty(&mrt->mfc6_unres_queue)) |
885 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
7bc570c8 YH |
886 | } |
887 | ||
c476efbc | 888 | static void ipmr_expire_process(unsigned long arg) |
7bc570c8 | 889 | { |
6bd52143 | 890 | struct mr6_table *mrt = (struct mr6_table *)arg; |
c476efbc | 891 | |
7bc570c8 | 892 | if (!spin_trylock(&mfc_unres_lock)) { |
6bd52143 | 893 | mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); |
7bc570c8 YH |
894 | return; |
895 | } | |
896 | ||
6bd52143 PM |
897 | if (!list_empty(&mrt->mfc6_unres_queue)) |
898 | ipmr_do_expire_process(mrt); | |
7bc570c8 YH |
899 | |
900 | spin_unlock(&mfc_unres_lock); | |
901 | } | |
902 | ||
903 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
904 | ||
6bd52143 | 905 | static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, |
b5aa30b1 | 906 | unsigned char *ttls) |
7bc570c8 YH |
907 | { |
908 | int vifi; | |
909 | ||
6ac7eb08 | 910 | cache->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 | 911 | cache->mfc_un.res.maxvif = 0; |
6ac7eb08 | 912 | memset(cache->mfc_un.res.ttls, 255, MAXMIFS); |
7bc570c8 | 913 | |
6bd52143 PM |
914 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
915 | if (MIF_EXISTS(mrt, vifi) && | |
4e16880c | 916 | ttls[vifi] && ttls[vifi] < 255) { |
7bc570c8 YH |
917 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
918 | if (cache->mfc_un.res.minvif > vifi) | |
919 | cache->mfc_un.res.minvif = vifi; | |
920 | if (cache->mfc_un.res.maxvif <= vifi) | |
921 | cache->mfc_un.res.maxvif = vifi + 1; | |
922 | } | |
923 | } | |
924 | } | |
925 | ||
6bd52143 PM |
926 | static int mif6_add(struct net *net, struct mr6_table *mrt, |
927 | struct mif6ctl *vifc, int mrtsock) | |
7bc570c8 YH |
928 | { |
929 | int vifi = vifc->mif6c_mifi; | |
6bd52143 | 930 | struct mif_device *v = &mrt->vif6_table[vifi]; |
7bc570c8 | 931 | struct net_device *dev; |
1d6e55f1 | 932 | struct inet6_dev *in6_dev; |
5ae7b444 | 933 | int err; |
7bc570c8 YH |
934 | |
935 | /* Is vif busy ? */ | |
6bd52143 | 936 | if (MIF_EXISTS(mrt, vifi)) |
7bc570c8 YH |
937 | return -EADDRINUSE; |
938 | ||
939 | switch (vifc->mif6c_flags) { | |
14fb64e1 YH |
940 | #ifdef CONFIG_IPV6_PIMSM_V2 |
941 | case MIFF_REGISTER: | |
942 | /* | |
943 | * Special Purpose VIF in PIM | |
944 | * All the packets will be sent to the daemon | |
945 | */ | |
6bd52143 | 946 | if (mrt->mroute_reg_vif_num >= 0) |
14fb64e1 | 947 | return -EADDRINUSE; |
d1db275d | 948 | dev = ip6mr_reg_vif(net, mrt); |
14fb64e1 YH |
949 | if (!dev) |
950 | return -ENOBUFS; | |
5ae7b444 WC |
951 | err = dev_set_allmulti(dev, 1); |
952 | if (err) { | |
953 | unregister_netdevice(dev); | |
7af3db78 | 954 | dev_put(dev); |
5ae7b444 WC |
955 | return err; |
956 | } | |
14fb64e1 YH |
957 | break; |
958 | #endif | |
7bc570c8 | 959 | case 0: |
8229efda | 960 | dev = dev_get_by_index(net, vifc->mif6c_pifi); |
7bc570c8 YH |
961 | if (!dev) |
962 | return -EADDRNOTAVAIL; | |
5ae7b444 | 963 | err = dev_set_allmulti(dev, 1); |
7af3db78 WC |
964 | if (err) { |
965 | dev_put(dev); | |
5ae7b444 | 966 | return err; |
7af3db78 | 967 | } |
7bc570c8 YH |
968 | break; |
969 | default: | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
1d6e55f1 | 973 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 974 | if (in6_dev) { |
1d6e55f1 | 975 | in6_dev->cnf.mc_forwarding++; |
d67b8c61 ND |
976 | inet6_netconf_notify_devconf(dev_net(dev), |
977 | NETCONFA_MC_FORWARDING, | |
978 | dev->ifindex, &in6_dev->cnf); | |
979 | } | |
1d6e55f1 | 980 | |
7bc570c8 YH |
981 | /* |
982 | * Fill in the VIF structures | |
983 | */ | |
984 | v->rate_limit = vifc->vifc_rate_limit; | |
985 | v->flags = vifc->mif6c_flags; | |
986 | if (!mrtsock) | |
987 | v->flags |= VIFF_STATIC; | |
988 | v->threshold = vifc->vifc_threshold; | |
989 | v->bytes_in = 0; | |
990 | v->bytes_out = 0; | |
991 | v->pkt_in = 0; | |
992 | v->pkt_out = 0; | |
993 | v->link = dev->ifindex; | |
994 | if (v->flags & MIFF_REGISTER) | |
a54acb3a | 995 | v->link = dev_get_iflink(dev); |
7bc570c8 YH |
996 | |
997 | /* And finish update writing critical data */ | |
998 | write_lock_bh(&mrt_lock); | |
7bc570c8 | 999 | v->dev = dev; |
14fb64e1 YH |
1000 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1001 | if (v->flags & MIFF_REGISTER) | |
6bd52143 | 1002 | mrt->mroute_reg_vif_num = vifi; |
14fb64e1 | 1003 | #endif |
6bd52143 PM |
1004 | if (vifi + 1 > mrt->maxvif) |
1005 | mrt->maxvif = vifi + 1; | |
7bc570c8 YH |
1006 | write_unlock_bh(&mrt_lock); |
1007 | return 0; | |
1008 | } | |
1009 | ||
6bd52143 | 1010 | static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt, |
b71d1d42 ED |
1011 | const struct in6_addr *origin, |
1012 | const struct in6_addr *mcastgrp) | |
7bc570c8 YH |
1013 | { |
1014 | int line = MFC6_HASH(mcastgrp, origin); | |
1015 | struct mfc6_cache *c; | |
1016 | ||
6bd52143 | 1017 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 YH |
1018 | if (ipv6_addr_equal(&c->mf6c_origin, origin) && |
1019 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) | |
f30a7784 | 1020 | return c; |
7bc570c8 | 1021 | } |
f30a7784 | 1022 | return NULL; |
7bc570c8 YH |
1023 | } |
1024 | ||
660b26dc ND |
1025 | /* Look for a (*,*,oif) entry */ |
1026 | static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt, | |
1027 | mifi_t mifi) | |
1028 | { | |
1029 | int line = MFC6_HASH(&in6addr_any, &in6addr_any); | |
1030 | struct mfc6_cache *c; | |
1031 | ||
1032 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1033 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1034 | ipv6_addr_any(&c->mf6c_mcastgrp) && | |
1035 | (c->mfc_un.res.ttls[mifi] < 255)) | |
1036 | return c; | |
1037 | ||
1038 | return NULL; | |
1039 | } | |
1040 | ||
1041 | /* Look for a (*,G) entry */ | |
1042 | static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt, | |
1043 | struct in6_addr *mcastgrp, | |
1044 | mifi_t mifi) | |
1045 | { | |
1046 | int line = MFC6_HASH(mcastgrp, &in6addr_any); | |
1047 | struct mfc6_cache *c, *proxy; | |
1048 | ||
1049 | if (ipv6_addr_any(mcastgrp)) | |
1050 | goto skip; | |
1051 | ||
1052 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) | |
1053 | if (ipv6_addr_any(&c->mf6c_origin) && | |
1054 | ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) { | |
1055 | if (c->mfc_un.res.ttls[mifi] < 255) | |
1056 | return c; | |
1057 | ||
1058 | /* It's ok if the mifi is part of the static tree */ | |
1059 | proxy = ip6mr_cache_find_any_parent(mrt, | |
1060 | c->mf6c_parent); | |
1061 | if (proxy && proxy->mfc_un.res.ttls[mifi] < 255) | |
1062 | return c; | |
1063 | } | |
1064 | ||
1065 | skip: | |
1066 | return ip6mr_cache_find_any_parent(mrt, mifi); | |
1067 | } | |
1068 | ||
7bc570c8 YH |
1069 | /* |
1070 | * Allocate a multicast cache entry | |
1071 | */ | |
b5aa30b1 | 1072 | static struct mfc6_cache *ip6mr_cache_alloc(void) |
7bc570c8 | 1073 | { |
36cbac59 | 1074 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
63159f29 | 1075 | if (!c) |
7bc570c8 | 1076 | return NULL; |
6ac7eb08 | 1077 | c->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 YH |
1078 | return c; |
1079 | } | |
1080 | ||
b5aa30b1 | 1081 | static struct mfc6_cache *ip6mr_cache_alloc_unres(void) |
7bc570c8 | 1082 | { |
36cbac59 | 1083 | struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
63159f29 | 1084 | if (!c) |
7bc570c8 | 1085 | return NULL; |
7bc570c8 YH |
1086 | skb_queue_head_init(&c->mfc_un.unres.unresolved); |
1087 | c->mfc_un.unres.expires = jiffies + 10 * HZ; | |
1088 | return c; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * A cache entry has gone into a resolved state from queued | |
1093 | */ | |
1094 | ||
6bd52143 PM |
1095 | static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt, |
1096 | struct mfc6_cache *uc, struct mfc6_cache *c) | |
7bc570c8 YH |
1097 | { |
1098 | struct sk_buff *skb; | |
1099 | ||
1100 | /* | |
1101 | * Play the pending entries through our router | |
1102 | */ | |
1103 | ||
67ba4152 | 1104 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
7bc570c8 | 1105 | if (ipv6_hdr(skb)->version == 0) { |
7bc570c8 YH |
1106 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); |
1107 | ||
573ce260 | 1108 | if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
549e028d | 1109 | nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; |
7bc570c8 YH |
1110 | } else { |
1111 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1112 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 1113 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1114 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; |
7bc570c8 | 1115 | } |
15e47304 | 1116 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 | 1117 | } else |
6bd52143 | 1118 | ip6_mr_forward(net, mrt, skb, c); |
7bc570c8 YH |
1119 | } |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd | |
1124 | * expects the following bizarre scheme. | |
1125 | * | |
1126 | * Called under mrt_lock. | |
1127 | */ | |
1128 | ||
6bd52143 PM |
1129 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, |
1130 | mifi_t mifi, int assert) | |
7bc570c8 YH |
1131 | { |
1132 | struct sk_buff *skb; | |
1133 | struct mrt6msg *msg; | |
1134 | int ret; | |
1135 | ||
14fb64e1 YH |
1136 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1137 | if (assert == MRT6MSG_WHOLEPKT) | |
1138 | skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt) | |
1139 | +sizeof(*msg)); | |
1140 | else | |
1141 | #endif | |
1142 | skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC); | |
7bc570c8 YH |
1143 | |
1144 | if (!skb) | |
1145 | return -ENOBUFS; | |
1146 | ||
1147 | /* I suppose that internal messages | |
1148 | * do not require checksums */ | |
1149 | ||
1150 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1151 | ||
14fb64e1 YH |
1152 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1153 | if (assert == MRT6MSG_WHOLEPKT) { | |
1154 | /* Ugly, but we have no choice with this interface. | |
1155 | Duplicate old header, fix length etc. | |
1156 | And all this only to mangle msg->im6_msgtype and | |
1157 | to set msg->im6_mbz to "mbz" :-) | |
1158 | */ | |
1159 | skb_push(skb, -skb_network_offset(pkt)); | |
1160 | ||
1161 | skb_push(skb, sizeof(*msg)); | |
1162 | skb_reset_transport_header(skb); | |
1163 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1164 | msg->im6_mbz = 0; | |
1165 | msg->im6_msgtype = MRT6MSG_WHOLEPKT; | |
6bd52143 | 1166 | msg->im6_mif = mrt->mroute_reg_vif_num; |
14fb64e1 | 1167 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1168 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1169 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
14fb64e1 YH |
1170 | |
1171 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1172 | } else | |
1173 | #endif | |
1174 | { | |
7bc570c8 YH |
1175 | /* |
1176 | * Copy the IP header | |
1177 | */ | |
1178 | ||
1179 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1180 | skb_reset_network_header(skb); | |
1181 | skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr)); | |
1182 | ||
1183 | /* | |
1184 | * Add our header | |
1185 | */ | |
1186 | skb_put(skb, sizeof(*msg)); | |
1187 | skb_reset_transport_header(skb); | |
1188 | msg = (struct mrt6msg *)skb_transport_header(skb); | |
1189 | ||
1190 | msg->im6_mbz = 0; | |
1191 | msg->im6_msgtype = assert; | |
6ac7eb08 | 1192 | msg->im6_mif = mifi; |
7bc570c8 | 1193 | msg->im6_pad = 0; |
4e3fd7a0 AD |
1194 | msg->im6_src = ipv6_hdr(pkt)->saddr; |
1195 | msg->im6_dst = ipv6_hdr(pkt)->daddr; | |
7bc570c8 | 1196 | |
adf30907 | 1197 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); |
7bc570c8 | 1198 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
14fb64e1 | 1199 | } |
7bc570c8 | 1200 | |
63159f29 | 1201 | if (!mrt->mroute6_sk) { |
7bc570c8 YH |
1202 | kfree_skb(skb); |
1203 | return -EINVAL; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Deliver to user space multicast routing algorithms | |
1208 | */ | |
6bd52143 | 1209 | ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); |
bd91b8bf | 1210 | if (ret < 0) { |
e87cc472 | 1211 | net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); |
7bc570c8 YH |
1212 | kfree_skb(skb); |
1213 | } | |
1214 | ||
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Queue a packet for resolution. It gets locked cache entry! | |
1220 | */ | |
1221 | ||
1222 | static int | |
6bd52143 | 1223 | ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) |
7bc570c8 | 1224 | { |
f30a7784 | 1225 | bool found = false; |
7bc570c8 YH |
1226 | int err; |
1227 | struct mfc6_cache *c; | |
1228 | ||
1229 | spin_lock_bh(&mfc_unres_lock); | |
6bd52143 | 1230 | list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1231 | if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && |
f30a7784 PM |
1232 | ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { |
1233 | found = true; | |
7bc570c8 | 1234 | break; |
f30a7784 | 1235 | } |
7bc570c8 YH |
1236 | } |
1237 | ||
f30a7784 | 1238 | if (!found) { |
7bc570c8 YH |
1239 | /* |
1240 | * Create a new entry if allowable | |
1241 | */ | |
1242 | ||
6bd52143 | 1243 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
b5aa30b1 | 1244 | (c = ip6mr_cache_alloc_unres()) == NULL) { |
7bc570c8 YH |
1245 | spin_unlock_bh(&mfc_unres_lock); |
1246 | ||
1247 | kfree_skb(skb); | |
1248 | return -ENOBUFS; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Fill in the new cache entry | |
1253 | */ | |
1254 | c->mf6c_parent = -1; | |
1255 | c->mf6c_origin = ipv6_hdr(skb)->saddr; | |
1256 | c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; | |
1257 | ||
1258 | /* | |
1259 | * Reflect first query at pim6sd | |
1260 | */ | |
6bd52143 | 1261 | err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); |
8229efda | 1262 | if (err < 0) { |
7bc570c8 YH |
1263 | /* If the report failed throw the cache entry |
1264 | out - Brad Parker | |
1265 | */ | |
1266 | spin_unlock_bh(&mfc_unres_lock); | |
1267 | ||
58701ad4 | 1268 | ip6mr_cache_free(c); |
7bc570c8 YH |
1269 | kfree_skb(skb); |
1270 | return err; | |
1271 | } | |
1272 | ||
6bd52143 PM |
1273 | atomic_inc(&mrt->cache_resolve_queue_len); |
1274 | list_add(&c->list, &mrt->mfc6_unres_queue); | |
812e44dd | 1275 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 | 1276 | |
6bd52143 | 1277 | ipmr_do_expire_process(mrt); |
7bc570c8 YH |
1278 | } |
1279 | ||
1280 | /* | |
1281 | * See if we can append the packet | |
1282 | */ | |
1283 | if (c->mfc_un.unres.unresolved.qlen > 3) { | |
1284 | kfree_skb(skb); | |
1285 | err = -ENOBUFS; | |
1286 | } else { | |
1287 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); | |
1288 | err = 0; | |
1289 | } | |
1290 | ||
1291 | spin_unlock_bh(&mfc_unres_lock); | |
1292 | return err; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * MFC6 cache manipulation by user space | |
1297 | */ | |
1298 | ||
660b26dc ND |
1299 | static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, |
1300 | int parent) | |
7bc570c8 YH |
1301 | { |
1302 | int line; | |
f30a7784 | 1303 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1304 | |
1305 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1306 | ||
6bd52143 | 1307 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1308 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1309 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1310 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1311 | (parent == -1 || parent == c->mf6c_parent)) { | |
7bc570c8 | 1312 | write_lock_bh(&mrt_lock); |
f30a7784 | 1313 | list_del(&c->list); |
7bc570c8 YH |
1314 | write_unlock_bh(&mrt_lock); |
1315 | ||
812e44dd | 1316 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1317 | ip6mr_cache_free(c); |
7bc570c8 YH |
1318 | return 0; |
1319 | } | |
1320 | } | |
1321 | return -ENOENT; | |
1322 | } | |
1323 | ||
1324 | static int ip6mr_device_event(struct notifier_block *this, | |
1325 | unsigned long event, void *ptr) | |
1326 | { | |
351638e7 | 1327 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
8229efda | 1328 | struct net *net = dev_net(dev); |
d1db275d | 1329 | struct mr6_table *mrt; |
7bc570c8 YH |
1330 | struct mif_device *v; |
1331 | int ct; | |
c871e664 | 1332 | LIST_HEAD(list); |
7bc570c8 | 1333 | |
7bc570c8 YH |
1334 | if (event != NETDEV_UNREGISTER) |
1335 | return NOTIFY_DONE; | |
1336 | ||
d1db275d PM |
1337 | ip6mr_for_each_table(mrt, net) { |
1338 | v = &mrt->vif6_table[0]; | |
1339 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1340 | if (v->dev == dev) | |
1341 | mif6_delete(mrt, ct, &list); | |
1342 | } | |
7bc570c8 | 1343 | } |
c871e664 ED |
1344 | unregister_netdevice_many(&list); |
1345 | ||
7bc570c8 YH |
1346 | return NOTIFY_DONE; |
1347 | } | |
1348 | ||
1349 | static struct notifier_block ip6_mr_notifier = { | |
1350 | .notifier_call = ip6mr_device_event | |
1351 | }; | |
1352 | ||
1353 | /* | |
1354 | * Setup for IP multicast routing | |
1355 | */ | |
1356 | ||
4e16880c BT |
1357 | static int __net_init ip6mr_net_init(struct net *net) |
1358 | { | |
d1db275d | 1359 | int err; |
f30a7784 | 1360 | |
d1db275d PM |
1361 | err = ip6mr_rules_init(net); |
1362 | if (err < 0) | |
4e16880c | 1363 | goto fail; |
8b90fc7e BT |
1364 | |
1365 | #ifdef CONFIG_PROC_FS | |
1366 | err = -ENOMEM; | |
d4beaa66 | 1367 | if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) |
8b90fc7e | 1368 | goto proc_vif_fail; |
d4beaa66 | 1369 | if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) |
8b90fc7e BT |
1370 | goto proc_cache_fail; |
1371 | #endif | |
6bd52143 | 1372 | |
4a6258a0 BT |
1373 | return 0; |
1374 | ||
8b90fc7e BT |
1375 | #ifdef CONFIG_PROC_FS |
1376 | proc_cache_fail: | |
ece31ffd | 1377 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
8b90fc7e | 1378 | proc_vif_fail: |
d1db275d | 1379 | ip6mr_rules_exit(net); |
8b90fc7e | 1380 | #endif |
4e16880c BT |
1381 | fail: |
1382 | return err; | |
1383 | } | |
1384 | ||
1385 | static void __net_exit ip6mr_net_exit(struct net *net) | |
1386 | { | |
8b90fc7e | 1387 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
1388 | remove_proc_entry("ip6_mr_cache", net->proc_net); |
1389 | remove_proc_entry("ip6_mr_vif", net->proc_net); | |
8b90fc7e | 1390 | #endif |
d1db275d | 1391 | ip6mr_rules_exit(net); |
4e16880c BT |
1392 | } |
1393 | ||
1394 | static struct pernet_operations ip6mr_net_ops = { | |
1395 | .init = ip6mr_net_init, | |
1396 | .exit = ip6mr_net_exit, | |
1397 | }; | |
1398 | ||
623d1a1a | 1399 | int __init ip6_mr_init(void) |
7bc570c8 | 1400 | { |
623d1a1a WC |
1401 | int err; |
1402 | ||
7bc570c8 YH |
1403 | mrt_cachep = kmem_cache_create("ip6_mrt_cache", |
1404 | sizeof(struct mfc6_cache), | |
1405 | 0, SLAB_HWCACHE_ALIGN, | |
1406 | NULL); | |
1407 | if (!mrt_cachep) | |
623d1a1a | 1408 | return -ENOMEM; |
7bc570c8 | 1409 | |
4e16880c BT |
1410 | err = register_pernet_subsys(&ip6mr_net_ops); |
1411 | if (err) | |
1412 | goto reg_pernet_fail; | |
1413 | ||
623d1a1a WC |
1414 | err = register_netdevice_notifier(&ip6_mr_notifier); |
1415 | if (err) | |
1416 | goto reg_notif_fail; | |
403dbb97 TG |
1417 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1418 | if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { | |
f3213831 | 1419 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
1420 | err = -EAGAIN; |
1421 | goto add_proto_fail; | |
1422 | } | |
1423 | #endif | |
c7ac8679 GR |
1424 | rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, |
1425 | ip6mr_rtm_dumproute, NULL); | |
623d1a1a | 1426 | return 0; |
403dbb97 TG |
1427 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1428 | add_proto_fail: | |
1429 | unregister_netdevice_notifier(&ip6_mr_notifier); | |
1430 | #endif | |
87b30a65 | 1431 | reg_notif_fail: |
4e16880c BT |
1432 | unregister_pernet_subsys(&ip6mr_net_ops); |
1433 | reg_pernet_fail: | |
87b30a65 | 1434 | kmem_cache_destroy(mrt_cachep); |
623d1a1a | 1435 | return err; |
7bc570c8 YH |
1436 | } |
1437 | ||
623d1a1a WC |
1438 | void ip6_mr_cleanup(void) |
1439 | { | |
ffb1388a DJ |
1440 | rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE); |
1441 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1442 | inet6_del_protocol(&pim6_protocol, IPPROTO_PIM); | |
1443 | #endif | |
623d1a1a | 1444 | unregister_netdevice_notifier(&ip6_mr_notifier); |
4e16880c | 1445 | unregister_pernet_subsys(&ip6mr_net_ops); |
623d1a1a WC |
1446 | kmem_cache_destroy(mrt_cachep); |
1447 | } | |
7bc570c8 | 1448 | |
6bd52143 | 1449 | static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, |
660b26dc | 1450 | struct mf6cctl *mfc, int mrtsock, int parent) |
7bc570c8 | 1451 | { |
f30a7784 | 1452 | bool found = false; |
7bc570c8 | 1453 | int line; |
f30a7784 | 1454 | struct mfc6_cache *uc, *c; |
6ac7eb08 | 1455 | unsigned char ttls[MAXMIFS]; |
7bc570c8 YH |
1456 | int i; |
1457 | ||
a50436f2 PM |
1458 | if (mfc->mf6cc_parent >= MAXMIFS) |
1459 | return -ENFILE; | |
1460 | ||
6ac7eb08 RR |
1461 | memset(ttls, 255, MAXMIFS); |
1462 | for (i = 0; i < MAXMIFS; i++) { | |
7bc570c8 YH |
1463 | if (IF_ISSET(i, &mfc->mf6cc_ifset)) |
1464 | ttls[i] = 1; | |
1465 | ||
1466 | } | |
1467 | ||
1468 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1469 | ||
6bd52143 | 1470 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1471 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1472 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1473 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1474 | (parent == -1 || parent == mfc->mf6cc_parent)) { | |
f30a7784 | 1475 | found = true; |
7bc570c8 | 1476 | break; |
f30a7784 | 1477 | } |
7bc570c8 YH |
1478 | } |
1479 | ||
f30a7784 | 1480 | if (found) { |
7bc570c8 YH |
1481 | write_lock_bh(&mrt_lock); |
1482 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1483 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1484 | if (!mrtsock) |
1485 | c->mfc_flags |= MFC_STATIC; | |
1486 | write_unlock_bh(&mrt_lock); | |
812e44dd | 1487 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1488 | return 0; |
1489 | } | |
1490 | ||
660b26dc ND |
1491 | if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && |
1492 | !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) | |
7bc570c8 YH |
1493 | return -EINVAL; |
1494 | ||
b5aa30b1 | 1495 | c = ip6mr_cache_alloc(); |
63159f29 | 1496 | if (!c) |
7bc570c8 YH |
1497 | return -ENOMEM; |
1498 | ||
1499 | c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; | |
1500 | c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; | |
1501 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1502 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1503 | if (!mrtsock) |
1504 | c->mfc_flags |= MFC_STATIC; | |
1505 | ||
1506 | write_lock_bh(&mrt_lock); | |
6bd52143 | 1507 | list_add(&c->list, &mrt->mfc6_cache_array[line]); |
7bc570c8 YH |
1508 | write_unlock_bh(&mrt_lock); |
1509 | ||
1510 | /* | |
1511 | * Check to see if we resolved a queued list. If so we | |
1512 | * need to send on the frames and tidy up. | |
1513 | */ | |
f30a7784 | 1514 | found = false; |
7bc570c8 | 1515 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1516 | list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1517 | if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && |
7bc570c8 | 1518 | ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { |
f30a7784 | 1519 | list_del(&uc->list); |
6bd52143 | 1520 | atomic_dec(&mrt->cache_resolve_queue_len); |
f30a7784 | 1521 | found = true; |
7bc570c8 YH |
1522 | break; |
1523 | } | |
1524 | } | |
6bd52143 PM |
1525 | if (list_empty(&mrt->mfc6_unres_queue)) |
1526 | del_timer(&mrt->ipmr_expire_timer); | |
7bc570c8 YH |
1527 | spin_unlock_bh(&mfc_unres_lock); |
1528 | ||
f30a7784 | 1529 | if (found) { |
6bd52143 | 1530 | ip6mr_cache_resolve(net, mrt, uc, c); |
58701ad4 | 1531 | ip6mr_cache_free(uc); |
7bc570c8 | 1532 | } |
812e44dd | 1533 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1534 | return 0; |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Close the multicast socket, and clear the vif tables etc | |
1539 | */ | |
1540 | ||
4c698046 | 1541 | static void mroute_clean_tables(struct mr6_table *mrt, bool all) |
7bc570c8 YH |
1542 | { |
1543 | int i; | |
c871e664 | 1544 | LIST_HEAD(list); |
f30a7784 | 1545 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1546 | |
1547 | /* | |
1548 | * Shut down all active vif entries | |
1549 | */ | |
6bd52143 | 1550 | for (i = 0; i < mrt->maxvif; i++) { |
4c698046 NA |
1551 | if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) |
1552 | continue; | |
1553 | mif6_delete(mrt, i, &list); | |
7bc570c8 | 1554 | } |
c871e664 | 1555 | unregister_netdevice_many(&list); |
7bc570c8 YH |
1556 | |
1557 | /* | |
1558 | * Wipe the cache | |
1559 | */ | |
4a6258a0 | 1560 | for (i = 0; i < MFC6_LINES; i++) { |
6bd52143 | 1561 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { |
4c698046 | 1562 | if (!all && (c->mfc_flags & MFC_STATIC)) |
7bc570c8 | 1563 | continue; |
7bc570c8 | 1564 | write_lock_bh(&mrt_lock); |
f30a7784 | 1565 | list_del(&c->list); |
7bc570c8 YH |
1566 | write_unlock_bh(&mrt_lock); |
1567 | ||
812e44dd | 1568 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1569 | ip6mr_cache_free(c); |
7bc570c8 YH |
1570 | } |
1571 | } | |
1572 | ||
6bd52143 | 1573 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
7bc570c8 | 1574 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1575 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
f30a7784 | 1576 | list_del(&c->list); |
812e44dd | 1577 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 1578 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
1579 | } |
1580 | spin_unlock_bh(&mfc_unres_lock); | |
1581 | } | |
1582 | } | |
1583 | ||
6bd52143 | 1584 | static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) |
7bc570c8 YH |
1585 | { |
1586 | int err = 0; | |
8229efda | 1587 | struct net *net = sock_net(sk); |
7bc570c8 YH |
1588 | |
1589 | rtnl_lock(); | |
1590 | write_lock_bh(&mrt_lock); | |
6bd52143 PM |
1591 | if (likely(mrt->mroute6_sk == NULL)) { |
1592 | mrt->mroute6_sk = sk; | |
1d6e55f1 | 1593 | net->ipv6.devconf_all->mc_forwarding++; |
d67b8c61 ND |
1594 | inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
1595 | NETCONFA_IFINDEX_ALL, | |
1596 | net->ipv6.devconf_all); | |
1d6e55f1 | 1597 | } |
7bc570c8 YH |
1598 | else |
1599 | err = -EADDRINUSE; | |
1600 | write_unlock_bh(&mrt_lock); | |
1601 | ||
1602 | rtnl_unlock(); | |
1603 | ||
1604 | return err; | |
1605 | } | |
1606 | ||
1607 | int ip6mr_sk_done(struct sock *sk) | |
1608 | { | |
d1db275d | 1609 | int err = -EACCES; |
8229efda | 1610 | struct net *net = sock_net(sk); |
d1db275d | 1611 | struct mr6_table *mrt; |
7bc570c8 YH |
1612 | |
1613 | rtnl_lock(); | |
d1db275d PM |
1614 | ip6mr_for_each_table(mrt, net) { |
1615 | if (sk == mrt->mroute6_sk) { | |
1616 | write_lock_bh(&mrt_lock); | |
1617 | mrt->mroute6_sk = NULL; | |
1618 | net->ipv6.devconf_all->mc_forwarding--; | |
d67b8c61 ND |
1619 | inet6_netconf_notify_devconf(net, |
1620 | NETCONFA_MC_FORWARDING, | |
1621 | NETCONFA_IFINDEX_ALL, | |
1622 | net->ipv6.devconf_all); | |
d1db275d | 1623 | write_unlock_bh(&mrt_lock); |
7bc570c8 | 1624 | |
4c698046 | 1625 | mroute_clean_tables(mrt, false); |
d1db275d PM |
1626 | err = 0; |
1627 | break; | |
1628 | } | |
1629 | } | |
7bc570c8 YH |
1630 | rtnl_unlock(); |
1631 | ||
1632 | return err; | |
1633 | } | |
1634 | ||
d1db275d | 1635 | struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) |
6bd52143 | 1636 | { |
d1db275d | 1637 | struct mr6_table *mrt; |
4c9483b2 | 1638 | struct flowi6 fl6 = { |
e374c618 | 1639 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 DM |
1640 | .flowi6_oif = skb->dev->ifindex, |
1641 | .flowi6_mark = skb->mark, | |
d1db275d PM |
1642 | }; |
1643 | ||
4c9483b2 | 1644 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d | 1645 | return NULL; |
6bd52143 PM |
1646 | |
1647 | return mrt->mroute6_sk; | |
1648 | } | |
1649 | ||
7bc570c8 YH |
1650 | /* |
1651 | * Socket options and virtual interface manipulation. The whole | |
1652 | * virtual interface system is a complete heap, but unfortunately | |
1653 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1654 | * MOSPF/PIM router set up we can clean this up. | |
1655 | */ | |
1656 | ||
b7058842 | 1657 | int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
7bc570c8 | 1658 | { |
660b26dc | 1659 | int ret, parent = 0; |
7bc570c8 YH |
1660 | struct mif6ctl vif; |
1661 | struct mf6cctl mfc; | |
1662 | mifi_t mifi; | |
8229efda | 1663 | struct net *net = sock_net(sk); |
d1db275d PM |
1664 | struct mr6_table *mrt; |
1665 | ||
1666 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1667 | if (!mrt) |
d1db275d | 1668 | return -ENOENT; |
7bc570c8 YH |
1669 | |
1670 | if (optname != MRT6_INIT) { | |
af31f412 | 1671 | if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
7bc570c8 YH |
1672 | return -EACCES; |
1673 | } | |
1674 | ||
1675 | switch (optname) { | |
1676 | case MRT6_INIT: | |
1677 | if (sk->sk_type != SOCK_RAW || | |
c720c7e8 | 1678 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
7bc570c8 YH |
1679 | return -EOPNOTSUPP; |
1680 | if (optlen < sizeof(int)) | |
1681 | return -EINVAL; | |
1682 | ||
6bd52143 | 1683 | return ip6mr_sk_init(mrt, sk); |
7bc570c8 YH |
1684 | |
1685 | case MRT6_DONE: | |
1686 | return ip6mr_sk_done(sk); | |
1687 | ||
1688 | case MRT6_ADD_MIF: | |
1689 | if (optlen < sizeof(vif)) | |
1690 | return -EINVAL; | |
1691 | if (copy_from_user(&vif, optval, sizeof(vif))) | |
1692 | return -EFAULT; | |
6ac7eb08 | 1693 | if (vif.mif6c_mifi >= MAXMIFS) |
7bc570c8 YH |
1694 | return -ENFILE; |
1695 | rtnl_lock(); | |
6bd52143 | 1696 | ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); |
7bc570c8 YH |
1697 | rtnl_unlock(); |
1698 | return ret; | |
1699 | ||
1700 | case MRT6_DEL_MIF: | |
1701 | if (optlen < sizeof(mifi_t)) | |
1702 | return -EINVAL; | |
1703 | if (copy_from_user(&mifi, optval, sizeof(mifi_t))) | |
1704 | return -EFAULT; | |
1705 | rtnl_lock(); | |
6bd52143 | 1706 | ret = mif6_delete(mrt, mifi, NULL); |
7bc570c8 YH |
1707 | rtnl_unlock(); |
1708 | return ret; | |
1709 | ||
1710 | /* | |
1711 | * Manipulate the forwarding caches. These live | |
1712 | * in a sort of kernel/user symbiosis. | |
1713 | */ | |
1714 | case MRT6_ADD_MFC: | |
1715 | case MRT6_DEL_MFC: | |
660b26dc ND |
1716 | parent = -1; |
1717 | case MRT6_ADD_MFC_PROXY: | |
1718 | case MRT6_DEL_MFC_PROXY: | |
7bc570c8 YH |
1719 | if (optlen < sizeof(mfc)) |
1720 | return -EINVAL; | |
1721 | if (copy_from_user(&mfc, optval, sizeof(mfc))) | |
1722 | return -EFAULT; | |
660b26dc ND |
1723 | if (parent == 0) |
1724 | parent = mfc.mf6cc_parent; | |
7bc570c8 | 1725 | rtnl_lock(); |
660b26dc ND |
1726 | if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) |
1727 | ret = ip6mr_mfc_delete(mrt, &mfc, parent); | |
7bc570c8 | 1728 | else |
660b26dc ND |
1729 | ret = ip6mr_mfc_add(net, mrt, &mfc, |
1730 | sk == mrt->mroute6_sk, parent); | |
7bc570c8 YH |
1731 | rtnl_unlock(); |
1732 | return ret; | |
1733 | ||
14fb64e1 YH |
1734 | /* |
1735 | * Control PIM assert (to activate pim will activate assert) | |
1736 | */ | |
1737 | case MRT6_ASSERT: | |
1738 | { | |
1739 | int v; | |
03f52a0a JP |
1740 | |
1741 | if (optlen != sizeof(v)) | |
1742 | return -EINVAL; | |
14fb64e1 YH |
1743 | if (get_user(v, (int __user *)optval)) |
1744 | return -EFAULT; | |
53d6841d | 1745 | mrt->mroute_do_assert = v; |
14fb64e1 YH |
1746 | return 0; |
1747 | } | |
1748 | ||
1749 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1750 | case MRT6_PIM: | |
1751 | { | |
a9f83bf3 | 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; | |
1758 | v = !!v; | |
1759 | rtnl_lock(); | |
1760 | ret = 0; | |
6bd52143 PM |
1761 | if (v != mrt->mroute_do_pim) { |
1762 | mrt->mroute_do_pim = v; | |
1763 | mrt->mroute_do_assert = v; | |
14fb64e1 YH |
1764 | } |
1765 | rtnl_unlock(); | |
1766 | return ret; | |
1767 | } | |
1768 | ||
d1db275d PM |
1769 | #endif |
1770 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
1771 | case MRT6_TABLE: | |
1772 | { | |
1773 | u32 v; | |
1774 | ||
1775 | if (optlen != sizeof(u32)) | |
1776 | return -EINVAL; | |
1777 | if (get_user(v, (u32 __user *)optval)) | |
1778 | return -EFAULT; | |
75356a81 DC |
1779 | /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
1780 | if (v != RT_TABLE_DEFAULT && v >= 100000000) | |
1781 | return -EINVAL; | |
d1db275d PM |
1782 | if (sk == mrt->mroute6_sk) |
1783 | return -EBUSY; | |
1784 | ||
1785 | rtnl_lock(); | |
1786 | ret = 0; | |
1787 | if (!ip6mr_new_table(net, v)) | |
1788 | ret = -ENOMEM; | |
1789 | raw6_sk(sk)->ip6mr_table = v; | |
1790 | rtnl_unlock(); | |
1791 | return ret; | |
1792 | } | |
14fb64e1 | 1793 | #endif |
7bc570c8 | 1794 | /* |
7d120c55 | 1795 | * Spurious command, or MRT6_VERSION which you cannot |
7bc570c8 YH |
1796 | * set. |
1797 | */ | |
1798 | default: | |
1799 | return -ENOPROTOOPT; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Getsock opt support for the multicast routing system. | |
1805 | */ | |
1806 | ||
1807 | int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, | |
1808 | int __user *optlen) | |
1809 | { | |
1810 | int olr; | |
1811 | int val; | |
8229efda | 1812 | struct net *net = sock_net(sk); |
d1db275d PM |
1813 | struct mr6_table *mrt; |
1814 | ||
1815 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1816 | if (!mrt) |
d1db275d | 1817 | return -ENOENT; |
7bc570c8 YH |
1818 | |
1819 | switch (optname) { | |
1820 | case MRT6_VERSION: | |
1821 | val = 0x0305; | |
1822 | break; | |
14fb64e1 YH |
1823 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1824 | case MRT6_PIM: | |
6bd52143 | 1825 | val = mrt->mroute_do_pim; |
14fb64e1 YH |
1826 | break; |
1827 | #endif | |
1828 | case MRT6_ASSERT: | |
6bd52143 | 1829 | val = mrt->mroute_do_assert; |
14fb64e1 | 1830 | break; |
7bc570c8 YH |
1831 | default: |
1832 | return -ENOPROTOOPT; | |
1833 | } | |
1834 | ||
1835 | if (get_user(olr, optlen)) | |
1836 | return -EFAULT; | |
1837 | ||
1838 | olr = min_t(int, olr, sizeof(int)); | |
1839 | if (olr < 0) | |
1840 | return -EINVAL; | |
1841 | ||
1842 | if (put_user(olr, optlen)) | |
1843 | return -EFAULT; | |
1844 | if (copy_to_user(optval, &val, olr)) | |
1845 | return -EFAULT; | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | * The IP multicast ioctl support routines. | |
1851 | */ | |
1852 | ||
1853 | int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) | |
1854 | { | |
1855 | struct sioc_sg_req6 sr; | |
1856 | struct sioc_mif_req6 vr; | |
1857 | struct mif_device *vif; | |
1858 | struct mfc6_cache *c; | |
8229efda | 1859 | struct net *net = sock_net(sk); |
d1db275d PM |
1860 | struct mr6_table *mrt; |
1861 | ||
1862 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1863 | if (!mrt) |
d1db275d | 1864 | return -ENOENT; |
7bc570c8 YH |
1865 | |
1866 | switch (cmd) { | |
1867 | case SIOCGETMIFCNT_IN6: | |
1868 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1869 | return -EFAULT; | |
6bd52143 | 1870 | if (vr.mifi >= mrt->maxvif) |
7bc570c8 YH |
1871 | return -EINVAL; |
1872 | read_lock(&mrt_lock); | |
6bd52143 PM |
1873 | vif = &mrt->vif6_table[vr.mifi]; |
1874 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
7bc570c8 YH |
1875 | vr.icount = vif->pkt_in; |
1876 | vr.ocount = vif->pkt_out; | |
1877 | vr.ibytes = vif->bytes_in; | |
1878 | vr.obytes = vif->bytes_out; | |
1879 | read_unlock(&mrt_lock); | |
1880 | ||
1881 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1882 | return -EFAULT; | |
1883 | return 0; | |
1884 | } | |
1885 | read_unlock(&mrt_lock); | |
1886 | return -EADDRNOTAVAIL; | |
1887 | case SIOCGETSGCNT_IN6: | |
1888 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1889 | return -EFAULT; | |
1890 | ||
1891 | read_lock(&mrt_lock); | |
6bd52143 | 1892 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
7bc570c8 YH |
1893 | if (c) { |
1894 | sr.pktcnt = c->mfc_un.res.pkt; | |
1895 | sr.bytecnt = c->mfc_un.res.bytes; | |
1896 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1897 | read_unlock(&mrt_lock); | |
1898 | ||
1899 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1900 | return -EFAULT; | |
1901 | return 0; | |
1902 | } | |
1903 | read_unlock(&mrt_lock); | |
1904 | return -EADDRNOTAVAIL; | |
1905 | default: | |
1906 | return -ENOIOCTLCMD; | |
1907 | } | |
1908 | } | |
1909 | ||
e2d57766 DM |
1910 | #ifdef CONFIG_COMPAT |
1911 | struct compat_sioc_sg_req6 { | |
1912 | struct sockaddr_in6 src; | |
1913 | struct sockaddr_in6 grp; | |
1914 | compat_ulong_t pktcnt; | |
1915 | compat_ulong_t bytecnt; | |
1916 | compat_ulong_t wrong_if; | |
1917 | }; | |
1918 | ||
1919 | struct compat_sioc_mif_req6 { | |
1920 | mifi_t mifi; | |
1921 | compat_ulong_t icount; | |
1922 | compat_ulong_t ocount; | |
1923 | compat_ulong_t ibytes; | |
1924 | compat_ulong_t obytes; | |
1925 | }; | |
1926 | ||
1927 | int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) | |
1928 | { | |
1929 | struct compat_sioc_sg_req6 sr; | |
1930 | struct compat_sioc_mif_req6 vr; | |
1931 | struct mif_device *vif; | |
1932 | struct mfc6_cache *c; | |
1933 | struct net *net = sock_net(sk); | |
1934 | struct mr6_table *mrt; | |
1935 | ||
1936 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
63159f29 | 1937 | if (!mrt) |
e2d57766 DM |
1938 | return -ENOENT; |
1939 | ||
1940 | switch (cmd) { | |
1941 | case SIOCGETMIFCNT_IN6: | |
1942 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1943 | return -EFAULT; | |
1944 | if (vr.mifi >= mrt->maxvif) | |
1945 | return -EINVAL; | |
1946 | read_lock(&mrt_lock); | |
1947 | vif = &mrt->vif6_table[vr.mifi]; | |
1948 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
1949 | vr.icount = vif->pkt_in; | |
1950 | vr.ocount = vif->pkt_out; | |
1951 | vr.ibytes = vif->bytes_in; | |
1952 | vr.obytes = vif->bytes_out; | |
1953 | read_unlock(&mrt_lock); | |
1954 | ||
1955 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1956 | return -EFAULT; | |
1957 | return 0; | |
1958 | } | |
1959 | read_unlock(&mrt_lock); | |
1960 | return -EADDRNOTAVAIL; | |
1961 | case SIOCGETSGCNT_IN6: | |
1962 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1963 | return -EFAULT; | |
1964 | ||
1965 | read_lock(&mrt_lock); | |
1966 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); | |
1967 | if (c) { | |
1968 | sr.pktcnt = c->mfc_un.res.pkt; | |
1969 | sr.bytecnt = c->mfc_un.res.bytes; | |
1970 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1971 | read_unlock(&mrt_lock); | |
1972 | ||
1973 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1974 | return -EFAULT; | |
1975 | return 0; | |
1976 | } | |
1977 | read_unlock(&mrt_lock); | |
1978 | return -EADDRNOTAVAIL; | |
1979 | default: | |
1980 | return -ENOIOCTLCMD; | |
1981 | } | |
1982 | } | |
1983 | #endif | |
7bc570c8 | 1984 | |
0c4b51f0 | 1985 | static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb) |
7bc570c8 | 1986 | { |
1d015503 ED |
1987 | __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), |
1988 | IPSTATS_MIB_OUTFORWDATAGRAMS); | |
1989 | __IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)), | |
1990 | IPSTATS_MIB_OUTOCTETS, skb->len); | |
13206b6b | 1991 | return dst_output(net, sk, skb); |
7bc570c8 YH |
1992 | } |
1993 | ||
1994 | /* | |
1995 | * Processing handlers for ip6mr_forward | |
1996 | */ | |
1997 | ||
6bd52143 PM |
1998 | static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, |
1999 | struct sk_buff *skb, struct mfc6_cache *c, int vifi) | |
7bc570c8 YH |
2000 | { |
2001 | struct ipv6hdr *ipv6h; | |
6bd52143 | 2002 | struct mif_device *vif = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
2003 | struct net_device *dev; |
2004 | struct dst_entry *dst; | |
4c9483b2 | 2005 | struct flowi6 fl6; |
7bc570c8 | 2006 | |
63159f29 | 2007 | if (!vif->dev) |
7bc570c8 YH |
2008 | goto out_free; |
2009 | ||
14fb64e1 YH |
2010 | #ifdef CONFIG_IPV6_PIMSM_V2 |
2011 | if (vif->flags & MIFF_REGISTER) { | |
2012 | vif->pkt_out++; | |
2013 | vif->bytes_out += skb->len; | |
dc58c78c PE |
2014 | vif->dev->stats.tx_bytes += skb->len; |
2015 | vif->dev->stats.tx_packets++; | |
6bd52143 | 2016 | ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); |
8da73b73 | 2017 | goto out_free; |
14fb64e1 YH |
2018 | } |
2019 | #endif | |
2020 | ||
7bc570c8 YH |
2021 | ipv6h = ipv6_hdr(skb); |
2022 | ||
4c9483b2 DM |
2023 | fl6 = (struct flowi6) { |
2024 | .flowi6_oif = vif->link, | |
2025 | .daddr = ipv6h->daddr, | |
7bc570c8 YH |
2026 | }; |
2027 | ||
4c9483b2 | 2028 | dst = ip6_route_output(net, NULL, &fl6); |
5095d64d RL |
2029 | if (dst->error) { |
2030 | dst_release(dst); | |
7bc570c8 | 2031 | goto out_free; |
5095d64d | 2032 | } |
7bc570c8 | 2033 | |
adf30907 ED |
2034 | skb_dst_drop(skb); |
2035 | skb_dst_set(skb, dst); | |
7bc570c8 YH |
2036 | |
2037 | /* | |
2038 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally | |
2039 | * not only before forwarding, but after forwarding on all output | |
2040 | * interfaces. It is clear, if mrouter runs a multicasting | |
2041 | * program, it should receive packets not depending to what interface | |
2042 | * program is joined. | |
2043 | * If we will not make it, the program will have to join on all | |
2044 | * interfaces. On the other hand, multihoming host (or router, but | |
2045 | * not mrouter) cannot join to more than one interface - it will | |
2046 | * result in receiving multiple packets. | |
2047 | */ | |
2048 | dev = vif->dev; | |
2049 | skb->dev = dev; | |
2050 | vif->pkt_out++; | |
2051 | vif->bytes_out += skb->len; | |
2052 | ||
2053 | /* We are about to write */ | |
2054 | /* XXX: extension headers? */ | |
2055 | if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) | |
2056 | goto out_free; | |
2057 | ||
2058 | ipv6h = ipv6_hdr(skb); | |
2059 | ipv6h->hop_limit--; | |
2060 | ||
2061 | IP6CB(skb)->flags |= IP6SKB_FORWARDED; | |
2062 | ||
29a26a56 EB |
2063 | return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, |
2064 | net, NULL, skb, skb->dev, dev, | |
7bc570c8 YH |
2065 | ip6mr_forward2_finish); |
2066 | ||
2067 | out_free: | |
2068 | kfree_skb(skb); | |
2069 | return 0; | |
2070 | } | |
2071 | ||
6bd52143 | 2072 | static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) |
7bc570c8 YH |
2073 | { |
2074 | int ct; | |
6bd52143 PM |
2075 | |
2076 | for (ct = mrt->maxvif - 1; ct >= 0; ct--) { | |
2077 | if (mrt->vif6_table[ct].dev == dev) | |
7bc570c8 YH |
2078 | break; |
2079 | } | |
2080 | return ct; | |
2081 | } | |
2082 | ||
2b52c3ad RR |
2083 | static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
2084 | struct sk_buff *skb, struct mfc6_cache *cache) | |
7bc570c8 YH |
2085 | { |
2086 | int psend = -1; | |
2087 | int vif, ct; | |
660b26dc | 2088 | int true_vifi = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 YH |
2089 | |
2090 | vif = cache->mf6c_parent; | |
2091 | cache->mfc_un.res.pkt++; | |
2092 | cache->mfc_un.res.bytes += skb->len; | |
2093 | ||
660b26dc ND |
2094 | if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { |
2095 | struct mfc6_cache *cache_proxy; | |
2096 | ||
40dc2ca3 | 2097 | /* For an (*,G) entry, we only check that the incoming |
660b26dc ND |
2098 | * interface is part of the static tree. |
2099 | */ | |
2100 | cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); | |
2101 | if (cache_proxy && | |
2102 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2103 | goto forward; | |
2104 | } | |
2105 | ||
14fb64e1 YH |
2106 | /* |
2107 | * Wrong interface: drop packet and (maybe) send PIM assert. | |
2108 | */ | |
6bd52143 | 2109 | if (mrt->vif6_table[vif].dev != skb->dev) { |
14fb64e1 | 2110 | cache->mfc_un.res.wrong_if++; |
14fb64e1 | 2111 | |
6bd52143 | 2112 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
14fb64e1 YH |
2113 | /* pimsm uses asserts, when switching from RPT to SPT, |
2114 | so that we cannot check that packet arrived on an oif. | |
2115 | It is bad, but otherwise we would need to move pretty | |
2116 | large chunk of pimd to kernel. Ough... --ANK | |
2117 | */ | |
6bd52143 | 2118 | (mrt->mroute_do_pim || |
a21f3f99 | 2119 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
14fb64e1 YH |
2120 | time_after(jiffies, |
2121 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { | |
2122 | cache->mfc_un.res.last_assert = jiffies; | |
6bd52143 | 2123 | ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); |
14fb64e1 YH |
2124 | } |
2125 | goto dont_forward; | |
2126 | } | |
2127 | ||
660b26dc | 2128 | forward: |
6bd52143 PM |
2129 | mrt->vif6_table[vif].pkt_in++; |
2130 | mrt->vif6_table[vif].bytes_in += skb->len; | |
7bc570c8 YH |
2131 | |
2132 | /* | |
2133 | * Forward the frame | |
2134 | */ | |
660b26dc ND |
2135 | if (ipv6_addr_any(&cache->mf6c_origin) && |
2136 | ipv6_addr_any(&cache->mf6c_mcastgrp)) { | |
2137 | if (true_vifi >= 0 && | |
2138 | true_vifi != cache->mf6c_parent && | |
2139 | ipv6_hdr(skb)->hop_limit > | |
2140 | cache->mfc_un.res.ttls[cache->mf6c_parent]) { | |
2141 | /* It's an (*,*) entry and the packet is not coming from | |
2142 | * the upstream: forward the packet to the upstream | |
2143 | * only. | |
2144 | */ | |
2145 | psend = cache->mf6c_parent; | |
2146 | goto last_forward; | |
2147 | } | |
2148 | goto dont_forward; | |
2149 | } | |
7bc570c8 | 2150 | for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { |
660b26dc ND |
2151 | /* For (*,G) entry, don't forward to the incoming interface */ |
2152 | if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && | |
2153 | ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { | |
7bc570c8 YH |
2154 | if (psend != -1) { |
2155 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2156 | if (skb2) | |
6bd52143 | 2157 | ip6mr_forward2(net, mrt, skb2, cache, psend); |
7bc570c8 YH |
2158 | } |
2159 | psend = ct; | |
2160 | } | |
2161 | } | |
660b26dc | 2162 | last_forward: |
7bc570c8 | 2163 | if (psend != -1) { |
6bd52143 | 2164 | ip6mr_forward2(net, mrt, skb, cache, psend); |
2b52c3ad | 2165 | return; |
7bc570c8 YH |
2166 | } |
2167 | ||
14fb64e1 | 2168 | dont_forward: |
7bc570c8 | 2169 | kfree_skb(skb); |
7bc570c8 YH |
2170 | } |
2171 | ||
2172 | ||
2173 | /* | |
2174 | * Multicast packets for forwarding arrive here | |
2175 | */ | |
2176 | ||
2177 | int ip6_mr_input(struct sk_buff *skb) | |
2178 | { | |
2179 | struct mfc6_cache *cache; | |
8229efda | 2180 | struct net *net = dev_net(skb->dev); |
d1db275d | 2181 | struct mr6_table *mrt; |
4c9483b2 DM |
2182 | struct flowi6 fl6 = { |
2183 | .flowi6_iif = skb->dev->ifindex, | |
2184 | .flowi6_mark = skb->mark, | |
d1db275d PM |
2185 | }; |
2186 | int err; | |
2187 | ||
4c9483b2 | 2188 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
2015de5f BG |
2189 | if (err < 0) { |
2190 | kfree_skb(skb); | |
d1db275d | 2191 | return err; |
2015de5f | 2192 | } |
7bc570c8 YH |
2193 | |
2194 | read_lock(&mrt_lock); | |
6bd52143 | 2195 | cache = ip6mr_cache_find(mrt, |
8229efda | 2196 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
63159f29 | 2197 | if (!cache) { |
660b26dc ND |
2198 | int vif = ip6mr_find_vif(mrt, skb->dev); |
2199 | ||
2200 | if (vif >= 0) | |
2201 | cache = ip6mr_cache_find_any(mrt, | |
2202 | &ipv6_hdr(skb)->daddr, | |
2203 | vif); | |
2204 | } | |
7bc570c8 YH |
2205 | |
2206 | /* | |
2207 | * No usable cache entry | |
2208 | */ | |
63159f29 | 2209 | if (!cache) { |
7bc570c8 YH |
2210 | int vif; |
2211 | ||
6bd52143 | 2212 | vif = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 | 2213 | if (vif >= 0) { |
6bd52143 | 2214 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
7bc570c8 YH |
2215 | read_unlock(&mrt_lock); |
2216 | ||
2217 | return err; | |
2218 | } | |
2219 | read_unlock(&mrt_lock); | |
2220 | kfree_skb(skb); | |
2221 | return -ENODEV; | |
2222 | } | |
2223 | ||
6bd52143 | 2224 | ip6_mr_forward(net, mrt, skb, cache); |
7bc570c8 YH |
2225 | |
2226 | read_unlock(&mrt_lock); | |
2227 | ||
2228 | return 0; | |
2229 | } | |
2230 | ||
2231 | ||
5b285cac PM |
2232 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
2233 | struct mfc6_cache *c, struct rtmsg *rtm) | |
7bc570c8 YH |
2234 | { |
2235 | int ct; | |
2236 | struct rtnexthop *nhp; | |
70b386a0 | 2237 | struct nlattr *mp_attr; |
adfa85e4 | 2238 | struct rta_mfc_stats mfcs; |
7bc570c8 | 2239 | |
7438189b | 2240 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
ed0f160a | 2241 | if (c->mf6c_parent >= MAXMIFS) |
7438189b ND |
2242 | return -ENOENT; |
2243 | ||
74a0bd7d TG |
2244 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
2245 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) | |
2246 | return -EMSGSIZE; | |
70b386a0 | 2247 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
63159f29 | 2248 | if (!mp_attr) |
70b386a0 | 2249 | return -EMSGSIZE; |
7bc570c8 YH |
2250 | |
2251 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
6bd52143 | 2252 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
70b386a0 | 2253 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
63159f29 | 2254 | if (!nhp) { |
70b386a0 ND |
2255 | nla_nest_cancel(skb, mp_attr); |
2256 | return -EMSGSIZE; | |
2257 | } | |
2258 | ||
7bc570c8 YH |
2259 | nhp->rtnh_flags = 0; |
2260 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
6bd52143 | 2261 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
7bc570c8 YH |
2262 | nhp->rtnh_len = sizeof(*nhp); |
2263 | } | |
2264 | } | |
70b386a0 ND |
2265 | |
2266 | nla_nest_end(skb, mp_attr); | |
2267 | ||
adfa85e4 ND |
2268 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2269 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2270 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
3d6b66c1 | 2271 | if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) < 0) |
adfa85e4 ND |
2272 | return -EMSGSIZE; |
2273 | ||
7bc570c8 YH |
2274 | rtm->rtm_type = RTN_MULTICAST; |
2275 | return 1; | |
7bc570c8 YH |
2276 | } |
2277 | ||
8229efda BT |
2278 | int ip6mr_get_route(struct net *net, |
2279 | struct sk_buff *skb, struct rtmsg *rtm, int nowait) | |
7bc570c8 YH |
2280 | { |
2281 | int err; | |
d1db275d | 2282 | struct mr6_table *mrt; |
7bc570c8 | 2283 | struct mfc6_cache *cache; |
adf30907 | 2284 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
7bc570c8 | 2285 | |
d1db275d | 2286 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 2287 | if (!mrt) |
d1db275d PM |
2288 | return -ENOENT; |
2289 | ||
7bc570c8 | 2290 | read_lock(&mrt_lock); |
6bd52143 | 2291 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
660b26dc ND |
2292 | if (!cache && skb->dev) { |
2293 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2294 | ||
2295 | if (vif >= 0) | |
2296 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, | |
2297 | vif); | |
2298 | } | |
7bc570c8 YH |
2299 | |
2300 | if (!cache) { | |
2301 | struct sk_buff *skb2; | |
2302 | struct ipv6hdr *iph; | |
2303 | struct net_device *dev; | |
2304 | int vif; | |
2305 | ||
2306 | if (nowait) { | |
2307 | read_unlock(&mrt_lock); | |
2308 | return -EAGAIN; | |
2309 | } | |
2310 | ||
2311 | dev = skb->dev; | |
63159f29 | 2312 | if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
7bc570c8 YH |
2313 | read_unlock(&mrt_lock); |
2314 | return -ENODEV; | |
2315 | } | |
2316 | ||
2317 | /* really correct? */ | |
2318 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
2319 | if (!skb2) { | |
2320 | read_unlock(&mrt_lock); | |
2321 | return -ENOMEM; | |
2322 | } | |
2323 | ||
2324 | skb_reset_transport_header(skb2); | |
2325 | ||
2326 | skb_put(skb2, sizeof(struct ipv6hdr)); | |
2327 | skb_reset_network_header(skb2); | |
2328 | ||
2329 | iph = ipv6_hdr(skb2); | |
2330 | iph->version = 0; | |
2331 | iph->priority = 0; | |
2332 | iph->flow_lbl[0] = 0; | |
2333 | iph->flow_lbl[1] = 0; | |
2334 | iph->flow_lbl[2] = 0; | |
2335 | iph->payload_len = 0; | |
2336 | iph->nexthdr = IPPROTO_NONE; | |
2337 | iph->hop_limit = 0; | |
4e3fd7a0 AD |
2338 | iph->saddr = rt->rt6i_src.addr; |
2339 | iph->daddr = rt->rt6i_dst.addr; | |
7bc570c8 | 2340 | |
6bd52143 | 2341 | err = ip6mr_cache_unresolved(mrt, vif, skb2); |
7bc570c8 YH |
2342 | read_unlock(&mrt_lock); |
2343 | ||
2344 | return err; | |
2345 | } | |
2346 | ||
2347 | if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) | |
2348 | cache->mfc_flags |= MFC_NOTIFY; | |
2349 | ||
5b285cac | 2350 | err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); |
7bc570c8 YH |
2351 | read_unlock(&mrt_lock); |
2352 | return err; | |
2353 | } | |
2354 | ||
5b285cac | 2355 | static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
f518338b ND |
2356 | u32 portid, u32 seq, struct mfc6_cache *c, int cmd, |
2357 | int flags) | |
5b285cac PM |
2358 | { |
2359 | struct nlmsghdr *nlh; | |
2360 | struct rtmsg *rtm; | |
1eb99af5 | 2361 | int err; |
5b285cac | 2362 | |
f518338b | 2363 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
63159f29 | 2364 | if (!nlh) |
5b285cac PM |
2365 | return -EMSGSIZE; |
2366 | ||
2367 | rtm = nlmsg_data(nlh); | |
193c1e47 | 2368 | rtm->rtm_family = RTNL_FAMILY_IP6MR; |
5b285cac PM |
2369 | rtm->rtm_dst_len = 128; |
2370 | rtm->rtm_src_len = 128; | |
2371 | rtm->rtm_tos = 0; | |
2372 | rtm->rtm_table = mrt->id; | |
c78679e8 DM |
2373 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2374 | goto nla_put_failure; | |
1eb99af5 | 2375 | rtm->rtm_type = RTN_MULTICAST; |
5b285cac | 2376 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
9a68ac72 ND |
2377 | if (c->mfc_flags & MFC_STATIC) |
2378 | rtm->rtm_protocol = RTPROT_STATIC; | |
2379 | else | |
2380 | rtm->rtm_protocol = RTPROT_MROUTED; | |
5b285cac PM |
2381 | rtm->rtm_flags = 0; |
2382 | ||
930345ea JB |
2383 | if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) || |
2384 | nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp)) | |
c78679e8 | 2385 | goto nla_put_failure; |
1eb99af5 ND |
2386 | err = __ip6mr_fill_mroute(mrt, skb, c, rtm); |
2387 | /* do not break the dump if cache is unresolved */ | |
2388 | if (err < 0 && err != -ENOENT) | |
5b285cac PM |
2389 | goto nla_put_failure; |
2390 | ||
053c095a JB |
2391 | nlmsg_end(skb, nlh); |
2392 | return 0; | |
5b285cac PM |
2393 | |
2394 | nla_put_failure: | |
2395 | nlmsg_cancel(skb, nlh); | |
2396 | return -EMSGSIZE; | |
2397 | } | |
2398 | ||
812e44dd ND |
2399 | static int mr6_msgsize(bool unresolved, int maxvif) |
2400 | { | |
2401 | size_t len = | |
2402 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2403 | + nla_total_size(4) /* RTA_TABLE */ | |
2404 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ | |
2405 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ | |
2406 | ; | |
2407 | ||
2408 | if (!unresolved) | |
2409 | len = len | |
2410 | + nla_total_size(4) /* RTA_IIF */ | |
2411 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2412 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2413 | /* RTA_MFC_STATS */ | |
3d6b66c1 | 2414 | + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) |
812e44dd ND |
2415 | ; |
2416 | ||
2417 | return len; | |
2418 | } | |
2419 | ||
2420 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, | |
2421 | int cmd) | |
2422 | { | |
2423 | struct net *net = read_pnet(&mrt->net); | |
2424 | struct sk_buff *skb; | |
2425 | int err = -ENOBUFS; | |
2426 | ||
2427 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), | |
2428 | GFP_ATOMIC); | |
63159f29 | 2429 | if (!skb) |
812e44dd ND |
2430 | goto errout; |
2431 | ||
f518338b | 2432 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
812e44dd ND |
2433 | if (err < 0) |
2434 | goto errout; | |
2435 | ||
2436 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); | |
2437 | return; | |
2438 | ||
2439 | errout: | |
2440 | kfree_skb(skb); | |
2441 | if (err < 0) | |
2442 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); | |
2443 | } | |
2444 | ||
5b285cac PM |
2445 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2446 | { | |
2447 | struct net *net = sock_net(skb->sk); | |
2448 | struct mr6_table *mrt; | |
2449 | struct mfc6_cache *mfc; | |
2450 | unsigned int t = 0, s_t; | |
2451 | unsigned int h = 0, s_h; | |
2452 | unsigned int e = 0, s_e; | |
2453 | ||
2454 | s_t = cb->args[0]; | |
2455 | s_h = cb->args[1]; | |
2456 | s_e = cb->args[2]; | |
2457 | ||
2458 | read_lock(&mrt_lock); | |
2459 | ip6mr_for_each_table(mrt, net) { | |
2460 | if (t < s_t) | |
2461 | goto next_table; | |
2462 | if (t > s_t) | |
2463 | s_h = 0; | |
2464 | for (h = s_h; h < MFC6_LINES; h++) { | |
2465 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { | |
2466 | if (e < s_e) | |
2467 | goto next_entry; | |
2468 | if (ip6mr_fill_mroute(mrt, skb, | |
15e47304 | 2469 | NETLINK_CB(cb->skb).portid, |
5b285cac | 2470 | cb->nlh->nlmsg_seq, |
f518338b ND |
2471 | mfc, RTM_NEWROUTE, |
2472 | NLM_F_MULTI) < 0) | |
5b285cac PM |
2473 | goto done; |
2474 | next_entry: | |
2475 | e++; | |
2476 | } | |
2477 | e = s_e = 0; | |
2478 | } | |
1eb99af5 ND |
2479 | spin_lock_bh(&mfc_unres_lock); |
2480 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { | |
2481 | if (e < s_e) | |
2482 | goto next_entry2; | |
2483 | if (ip6mr_fill_mroute(mrt, skb, | |
2484 | NETLINK_CB(cb->skb).portid, | |
2485 | cb->nlh->nlmsg_seq, | |
f518338b ND |
2486 | mfc, RTM_NEWROUTE, |
2487 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2488 | spin_unlock_bh(&mfc_unres_lock); |
2489 | goto done; | |
2490 | } | |
2491 | next_entry2: | |
2492 | e++; | |
2493 | } | |
2494 | spin_unlock_bh(&mfc_unres_lock); | |
2495 | e = s_e = 0; | |
5b285cac PM |
2496 | s_h = 0; |
2497 | next_table: | |
2498 | t++; | |
2499 | } | |
2500 | done: | |
2501 | read_unlock(&mrt_lock); | |
2502 | ||
2503 | cb->args[2] = e; | |
2504 | cb->args[1] = h; | |
2505 | cb->args[0] = t; | |
2506 | ||
2507 | return skb->len; | |
2508 | } |