Commit | Line | Data |
---|---|---|
7bc570c8 YH |
1 | /* |
2 | * Linux IPv6 multicast routing support for BSD pim6sd | |
3 | * Based on net/ipv4/ipmr.c. | |
4 | * | |
5 | * (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr> | |
6 | * LSIIT Laboratory, Strasbourg, France | |
7 | * (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com> | |
8 | * 6WIND, Paris, France | |
9 | * Copyright (C)2007,2008 USAGI/WIDE Project | |
10 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | */ | |
18 | ||
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; |
6bd52143 PM |
59 | #ifdef CONFIG_NET_NS |
60 | struct net *net; | |
61 | #endif | |
d1db275d | 62 | u32 id; |
6bd52143 PM |
63 | struct sock *mroute6_sk; |
64 | struct timer_list ipmr_expire_timer; | |
65 | struct list_head mfc6_unres_queue; | |
66 | struct list_head mfc6_cache_array[MFC6_LINES]; | |
67 | struct mif_device vif6_table[MAXMIFS]; | |
68 | int maxvif; | |
69 | atomic_t cache_resolve_queue_len; | |
53d6841d JP |
70 | bool mroute_do_assert; |
71 | bool mroute_do_pim; | |
6bd52143 PM |
72 | #ifdef CONFIG_IPV6_PIMSM_V2 |
73 | int mroute_reg_vif_num; | |
74 | #endif | |
75 | }; | |
76 | ||
d1db275d PM |
77 | struct ip6mr_rule { |
78 | struct fib_rule common; | |
79 | }; | |
80 | ||
81 | struct ip6mr_result { | |
82 | struct mr6_table *mrt; | |
83 | }; | |
84 | ||
7bc570c8 YH |
85 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
86 | Note that the changes are semaphored via rtnl_lock. | |
87 | */ | |
88 | ||
89 | static DEFINE_RWLOCK(mrt_lock); | |
90 | ||
91 | /* | |
92 | * Multicast router control variables | |
93 | */ | |
94 | ||
6bd52143 | 95 | #define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL) |
7bc570c8 | 96 | |
7bc570c8 YH |
97 | /* Special spinlock for queue of unresolved entries */ |
98 | static DEFINE_SPINLOCK(mfc_unres_lock); | |
99 | ||
100 | /* We return to original Alan's scheme. Hash table of resolved | |
101 | entries is changed only in process context and protected | |
102 | with weak lock mrt_lock. Queue of unresolved entries is protected | |
103 | with strong spinlock mfc_unres_lock. | |
104 | ||
105 | In this case data path is free of exclusive locks at all. | |
106 | */ | |
107 | ||
108 | static struct kmem_cache *mrt_cachep __read_mostly; | |
109 | ||
d1db275d PM |
110 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id); |
111 | static void ip6mr_free_table(struct mr6_table *mrt); | |
112 | ||
6bd52143 PM |
113 | static int ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
114 | struct sk_buff *skb, struct mfc6_cache *cache); | |
115 | static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, | |
8229efda | 116 | mifi_t mifi, int assert); |
5b285cac PM |
117 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
118 | struct mfc6_cache *c, struct rtmsg *rtm); | |
812e44dd ND |
119 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, |
120 | int cmd); | |
5b285cac PM |
121 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, |
122 | struct netlink_callback *cb); | |
07ea536a | 123 | static void mroute_clean_tables(struct mr6_table *mrt, bool all); |
d1db275d PM |
124 | static void ipmr_expire_process(unsigned long arg); |
125 | ||
126 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
8ffb335e | 127 | #define ip6mr_for_each_table(mrt, net) \ |
d1db275d PM |
128 | list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) |
129 | ||
130 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
131 | { | |
132 | struct mr6_table *mrt; | |
133 | ||
134 | ip6mr_for_each_table(mrt, net) { | |
135 | if (mrt->id == id) | |
136 | return mrt; | |
137 | } | |
138 | return NULL; | |
139 | } | |
140 | ||
4c9483b2 | 141 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
142 | struct mr6_table **mrt) |
143 | { | |
d1db275d | 144 | int err; |
d6489021 HFS |
145 | struct ip6mr_result res; |
146 | struct fib_lookup_arg arg = { | |
147 | .result = &res, | |
148 | .flags = FIB_LOOKUP_NOREF, | |
149 | }; | |
d1db275d | 150 | |
4c9483b2 DM |
151 | err = fib_rules_lookup(net->ipv6.mr6_rules_ops, |
152 | flowi6_to_flowi(flp6), 0, &arg); | |
d1db275d PM |
153 | if (err < 0) |
154 | return err; | |
155 | *mrt = res.mrt; | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
160 | int flags, struct fib_lookup_arg *arg) | |
161 | { | |
162 | struct ip6mr_result *res = arg->result; | |
163 | struct mr6_table *mrt; | |
164 | ||
165 | switch (rule->action) { | |
166 | case FR_ACT_TO_TBL: | |
167 | break; | |
168 | case FR_ACT_UNREACHABLE: | |
169 | return -ENETUNREACH; | |
170 | case FR_ACT_PROHIBIT: | |
171 | return -EACCES; | |
172 | case FR_ACT_BLACKHOLE: | |
173 | default: | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | mrt = ip6mr_get_table(rule->fr_net, rule->table); | |
178 | if (mrt == NULL) | |
179 | return -EAGAIN; | |
180 | res->mrt = mrt; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) | |
185 | { | |
186 | return 1; | |
187 | } | |
188 | ||
189 | static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { | |
190 | FRA_GENERIC_POLICY, | |
191 | }; | |
192 | ||
193 | static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
194 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
195 | { | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
200 | struct nlattr **tb) | |
201 | { | |
202 | return 1; | |
203 | } | |
204 | ||
205 | static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
206 | struct fib_rule_hdr *frh) | |
207 | { | |
208 | frh->dst_len = 0; | |
209 | frh->src_len = 0; | |
210 | frh->tos = 0; | |
211 | return 0; | |
212 | } | |
213 | ||
04a6f82c | 214 | static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { |
d1db275d PM |
215 | .family = RTNL_FAMILY_IP6MR, |
216 | .rule_size = sizeof(struct ip6mr_rule), | |
217 | .addr_size = sizeof(struct in6_addr), | |
218 | .action = ip6mr_rule_action, | |
219 | .match = ip6mr_rule_match, | |
220 | .configure = ip6mr_rule_configure, | |
221 | .compare = ip6mr_rule_compare, | |
222 | .default_pref = fib_default_rule_pref, | |
223 | .fill = ip6mr_rule_fill, | |
224 | .nlgroup = RTNLGRP_IPV6_RULE, | |
225 | .policy = ip6mr_rule_policy, | |
226 | .owner = THIS_MODULE, | |
227 | }; | |
228 | ||
229 | static int __net_init ip6mr_rules_init(struct net *net) | |
230 | { | |
231 | struct fib_rules_ops *ops; | |
232 | struct mr6_table *mrt; | |
233 | int err; | |
234 | ||
235 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); | |
236 | if (IS_ERR(ops)) | |
237 | return PTR_ERR(ops); | |
238 | ||
239 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); | |
240 | ||
241 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
242 | if (mrt == NULL) { | |
243 | err = -ENOMEM; | |
244 | goto err1; | |
245 | } | |
246 | ||
247 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); | |
248 | if (err < 0) | |
249 | goto err2; | |
250 | ||
251 | net->ipv6.mr6_rules_ops = ops; | |
252 | return 0; | |
253 | ||
254 | err2: | |
255 | kfree(mrt); | |
256 | err1: | |
257 | fib_rules_unregister(ops); | |
258 | return err; | |
259 | } | |
260 | ||
261 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
262 | { | |
263 | struct mr6_table *mrt, *next; | |
264 | ||
69af51cb | 265 | rtnl_lock(); |
035320d5 ED |
266 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
267 | list_del(&mrt->list); | |
d1db275d | 268 | ip6mr_free_table(mrt); |
035320d5 | 269 | } |
69af51cb | 270 | rtnl_unlock(); |
d1db275d PM |
271 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
272 | } | |
273 | #else | |
274 | #define ip6mr_for_each_table(mrt, net) \ | |
275 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) | |
276 | ||
277 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
278 | { | |
279 | return net->ipv6.mrt6; | |
280 | } | |
281 | ||
4c9483b2 | 282 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
283 | struct mr6_table **mrt) |
284 | { | |
285 | *mrt = net->ipv6.mrt6; | |
286 | return 0; | |
287 | } | |
288 | ||
289 | static int __net_init ip6mr_rules_init(struct net *net) | |
290 | { | |
291 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
292 | return net->ipv6.mrt6 ? 0 : -ENOMEM; | |
293 | } | |
294 | ||
295 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
296 | { | |
69af51cb | 297 | rtnl_lock(); |
d1db275d | 298 | ip6mr_free_table(net->ipv6.mrt6); |
69af51cb HFS |
299 | net->ipv6.mrt6 = NULL; |
300 | rtnl_unlock(); | |
d1db275d PM |
301 | } |
302 | #endif | |
303 | ||
304 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) | |
305 | { | |
306 | struct mr6_table *mrt; | |
307 | unsigned int i; | |
308 | ||
309 | mrt = ip6mr_get_table(net, id); | |
310 | if (mrt != NULL) | |
311 | return mrt; | |
312 | ||
313 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
314 | if (mrt == NULL) | |
315 | return NULL; | |
316 | mrt->id = id; | |
317 | write_pnet(&mrt->net, net); | |
318 | ||
319 | /* Forwarding cache */ | |
320 | for (i = 0; i < MFC6_LINES; i++) | |
321 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); | |
322 | ||
323 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); | |
324 | ||
325 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, | |
326 | (unsigned long)mrt); | |
327 | ||
328 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
329 | mrt->mroute_reg_vif_num = -1; | |
330 | #endif | |
331 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
332 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); | |
333 | #endif | |
334 | return mrt; | |
335 | } | |
7bc570c8 | 336 | |
d1db275d PM |
337 | static void ip6mr_free_table(struct mr6_table *mrt) |
338 | { | |
40ea6e6f | 339 | del_timer_sync(&mrt->ipmr_expire_timer); |
07ea536a | 340 | mroute_clean_tables(mrt, true); |
d1db275d PM |
341 | kfree(mrt); |
342 | } | |
7bc570c8 YH |
343 | |
344 | #ifdef CONFIG_PROC_FS | |
345 | ||
346 | struct ipmr_mfc_iter { | |
8b90fc7e | 347 | struct seq_net_private p; |
d1db275d | 348 | struct mr6_table *mrt; |
f30a7784 | 349 | struct list_head *cache; |
7bc570c8 YH |
350 | int ct; |
351 | }; | |
352 | ||
353 | ||
8b90fc7e BT |
354 | static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, |
355 | struct ipmr_mfc_iter *it, loff_t pos) | |
7bc570c8 | 356 | { |
d1db275d | 357 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
358 | struct mfc6_cache *mfc; |
359 | ||
7bc570c8 | 360 | read_lock(&mrt_lock); |
f30a7784 | 361 | for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { |
6bd52143 | 362 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 | 363 | list_for_each_entry(mfc, it->cache, list) |
7bc570c8 YH |
364 | if (pos-- == 0) |
365 | return mfc; | |
f30a7784 | 366 | } |
7bc570c8 YH |
367 | read_unlock(&mrt_lock); |
368 | ||
7bc570c8 | 369 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 370 | it->cache = &mrt->mfc6_unres_queue; |
f30a7784 | 371 | list_for_each_entry(mfc, it->cache, list) |
c476efbc | 372 | if (pos-- == 0) |
7bc570c8 YH |
373 | return mfc; |
374 | spin_unlock_bh(&mfc_unres_lock); | |
375 | ||
376 | it->cache = NULL; | |
377 | return NULL; | |
378 | } | |
379 | ||
7bc570c8 YH |
380 | /* |
381 | * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif | |
382 | */ | |
383 | ||
384 | struct ipmr_vif_iter { | |
8b90fc7e | 385 | struct seq_net_private p; |
d1db275d | 386 | struct mr6_table *mrt; |
7bc570c8 YH |
387 | int ct; |
388 | }; | |
389 | ||
8b90fc7e BT |
390 | static struct mif_device *ip6mr_vif_seq_idx(struct net *net, |
391 | struct ipmr_vif_iter *iter, | |
7bc570c8 YH |
392 | loff_t pos) |
393 | { | |
d1db275d | 394 | struct mr6_table *mrt = iter->mrt; |
6bd52143 PM |
395 | |
396 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
397 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 YH |
398 | continue; |
399 | if (pos-- == 0) | |
6bd52143 | 400 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
401 | } |
402 | return NULL; | |
403 | } | |
404 | ||
405 | static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
406 | __acquires(mrt_lock) | |
407 | { | |
d1db275d | 408 | struct ipmr_vif_iter *iter = seq->private; |
8b90fc7e | 409 | struct net *net = seq_file_net(seq); |
d1db275d PM |
410 | struct mr6_table *mrt; |
411 | ||
412 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); | |
413 | if (mrt == NULL) | |
414 | return ERR_PTR(-ENOENT); | |
415 | ||
416 | iter->mrt = mrt; | |
8b90fc7e | 417 | |
7bc570c8 | 418 | read_lock(&mrt_lock); |
8b90fc7e BT |
419 | return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) |
420 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
421 | } |
422 | ||
423 | static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
424 | { | |
425 | struct ipmr_vif_iter *iter = seq->private; | |
8b90fc7e | 426 | struct net *net = seq_file_net(seq); |
d1db275d | 427 | struct mr6_table *mrt = iter->mrt; |
7bc570c8 YH |
428 | |
429 | ++*pos; | |
430 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 431 | return ip6mr_vif_seq_idx(net, iter, 0); |
7bc570c8 | 432 | |
6bd52143 PM |
433 | while (++iter->ct < mrt->maxvif) { |
434 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 | 435 | continue; |
6bd52143 | 436 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
437 | } |
438 | return NULL; | |
439 | } | |
440 | ||
441 | static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) | |
442 | __releases(mrt_lock) | |
443 | { | |
444 | read_unlock(&mrt_lock); | |
445 | } | |
446 | ||
447 | static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) | |
448 | { | |
d1db275d PM |
449 | struct ipmr_vif_iter *iter = seq->private; |
450 | struct mr6_table *mrt = iter->mrt; | |
8b90fc7e | 451 | |
7bc570c8 YH |
452 | if (v == SEQ_START_TOKEN) { |
453 | seq_puts(seq, | |
454 | "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); | |
455 | } else { | |
456 | const struct mif_device *vif = v; | |
457 | const char *name = vif->dev ? vif->dev->name : "none"; | |
458 | ||
459 | seq_printf(seq, | |
d430a227 | 460 | "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", |
6bd52143 | 461 | vif - mrt->vif6_table, |
7bc570c8 YH |
462 | name, vif->bytes_in, vif->pkt_in, |
463 | vif->bytes_out, vif->pkt_out, | |
464 | vif->flags); | |
465 | } | |
466 | return 0; | |
467 | } | |
468 | ||
98147d52 | 469 | static const struct seq_operations ip6mr_vif_seq_ops = { |
7bc570c8 YH |
470 | .start = ip6mr_vif_seq_start, |
471 | .next = ip6mr_vif_seq_next, | |
472 | .stop = ip6mr_vif_seq_stop, | |
473 | .show = ip6mr_vif_seq_show, | |
474 | }; | |
475 | ||
476 | static int ip6mr_vif_open(struct inode *inode, struct file *file) | |
477 | { | |
8b90fc7e BT |
478 | return seq_open_net(inode, file, &ip6mr_vif_seq_ops, |
479 | sizeof(struct ipmr_vif_iter)); | |
7bc570c8 YH |
480 | } |
481 | ||
5ca1b998 | 482 | static const struct file_operations ip6mr_vif_fops = { |
7bc570c8 YH |
483 | .owner = THIS_MODULE, |
484 | .open = ip6mr_vif_open, | |
485 | .read = seq_read, | |
486 | .llseek = seq_lseek, | |
8b90fc7e | 487 | .release = seq_release_net, |
7bc570c8 YH |
488 | }; |
489 | ||
490 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
491 | { | |
d1db275d | 492 | struct ipmr_mfc_iter *it = seq->private; |
8b90fc7e | 493 | struct net *net = seq_file_net(seq); |
d1db275d | 494 | struct mr6_table *mrt; |
8b90fc7e | 495 | |
d1db275d PM |
496 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
497 | if (mrt == NULL) | |
498 | return ERR_PTR(-ENOENT); | |
499 | ||
500 | it->mrt = mrt; | |
8b90fc7e BT |
501 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
502 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
503 | } |
504 | ||
505 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
506 | { | |
507 | struct mfc6_cache *mfc = v; | |
508 | struct ipmr_mfc_iter *it = seq->private; | |
8b90fc7e | 509 | struct net *net = seq_file_net(seq); |
d1db275d | 510 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
511 | |
512 | ++*pos; | |
513 | ||
514 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 515 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
7bc570c8 | 516 | |
f30a7784 PM |
517 | if (mfc->list.next != it->cache) |
518 | return list_entry(mfc->list.next, struct mfc6_cache, list); | |
7bc570c8 | 519 | |
6bd52143 | 520 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 YH |
521 | goto end_of_list; |
522 | ||
6bd52143 | 523 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
7bc570c8 | 524 | |
4a6258a0 | 525 | while (++it->ct < MFC6_LINES) { |
6bd52143 | 526 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 PM |
527 | if (list_empty(it->cache)) |
528 | continue; | |
529 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
530 | } |
531 | ||
532 | /* exhausted cache_array, show unresolved */ | |
533 | read_unlock(&mrt_lock); | |
6bd52143 | 534 | it->cache = &mrt->mfc6_unres_queue; |
7bc570c8 YH |
535 | it->ct = 0; |
536 | ||
537 | spin_lock_bh(&mfc_unres_lock); | |
f30a7784 PM |
538 | if (!list_empty(it->cache)) |
539 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
540 | |
541 | end_of_list: | |
542 | spin_unlock_bh(&mfc_unres_lock); | |
543 | it->cache = NULL; | |
544 | ||
545 | return NULL; | |
546 | } | |
547 | ||
548 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
549 | { | |
550 | struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 551 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 552 | |
6bd52143 | 553 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 | 554 | spin_unlock_bh(&mfc_unres_lock); |
02b5ca77 | 555 | else if (it->cache == &mrt->mfc6_cache_array[it->ct]) |
7bc570c8 YH |
556 | read_unlock(&mrt_lock); |
557 | } | |
558 | ||
559 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
560 | { | |
561 | int n; | |
562 | ||
563 | if (v == SEQ_START_TOKEN) { | |
564 | seq_puts(seq, | |
565 | "Group " | |
566 | "Origin " | |
567 | "Iif Pkts Bytes Wrong Oifs\n"); | |
568 | } else { | |
569 | const struct mfc6_cache *mfc = v; | |
570 | const struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 571 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 572 | |
999890b2 | 573 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
0c6ce78a | 574 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
1ea472e2 | 575 | mfc->mf6c_parent); |
7bc570c8 | 576 | |
6bd52143 | 577 | if (it->cache != &mrt->mfc6_unres_queue) { |
1ea472e2 BT |
578 | seq_printf(seq, " %8lu %8lu %8lu", |
579 | mfc->mfc_un.res.pkt, | |
580 | mfc->mfc_un.res.bytes, | |
581 | mfc->mfc_un.res.wrong_if); | |
7bc570c8 YH |
582 | for (n = mfc->mfc_un.res.minvif; |
583 | n < mfc->mfc_un.res.maxvif; n++) { | |
6bd52143 | 584 | if (MIF_EXISTS(mrt, n) && |
7bc570c8 YH |
585 | mfc->mfc_un.res.ttls[n] < 255) |
586 | seq_printf(seq, | |
587 | " %2d:%-3d", | |
588 | n, mfc->mfc_un.res.ttls[n]); | |
589 | } | |
1ea472e2 BT |
590 | } else { |
591 | /* unresolved mfc_caches don't contain | |
592 | * pkt, bytes and wrong_if values | |
593 | */ | |
594 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
7bc570c8 YH |
595 | } |
596 | seq_putc(seq, '\n'); | |
597 | } | |
598 | return 0; | |
599 | } | |
600 | ||
88e9d34c | 601 | static const struct seq_operations ipmr_mfc_seq_ops = { |
7bc570c8 YH |
602 | .start = ipmr_mfc_seq_start, |
603 | .next = ipmr_mfc_seq_next, | |
604 | .stop = ipmr_mfc_seq_stop, | |
605 | .show = ipmr_mfc_seq_show, | |
606 | }; | |
607 | ||
608 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
609 | { | |
8b90fc7e BT |
610 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
611 | sizeof(struct ipmr_mfc_iter)); | |
7bc570c8 YH |
612 | } |
613 | ||
5ca1b998 | 614 | static const struct file_operations ip6mr_mfc_fops = { |
7bc570c8 YH |
615 | .owner = THIS_MODULE, |
616 | .open = ipmr_mfc_open, | |
617 | .read = seq_read, | |
618 | .llseek = seq_lseek, | |
8b90fc7e | 619 | .release = seq_release_net, |
7bc570c8 YH |
620 | }; |
621 | #endif | |
622 | ||
14fb64e1 | 623 | #ifdef CONFIG_IPV6_PIMSM_V2 |
14fb64e1 YH |
624 | |
625 | static int pim6_rcv(struct sk_buff *skb) | |
626 | { | |
627 | struct pimreghdr *pim; | |
628 | struct ipv6hdr *encap; | |
629 | struct net_device *reg_dev = NULL; | |
8229efda | 630 | struct net *net = dev_net(skb->dev); |
d1db275d | 631 | struct mr6_table *mrt; |
4c9483b2 DM |
632 | struct flowi6 fl6 = { |
633 | .flowi6_iif = skb->dev->ifindex, | |
634 | .flowi6_mark = skb->mark, | |
d1db275d PM |
635 | }; |
636 | int reg_vif_num; | |
14fb64e1 YH |
637 | |
638 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) | |
639 | goto drop; | |
640 | ||
641 | pim = (struct pimreghdr *)skb_transport_header(skb); | |
642 | if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) || | |
643 | (pim->flags & PIM_NULL_REGISTER) || | |
1d6e55f1 TG |
644 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
645 | sizeof(*pim), IPPROTO_PIM, | |
646 | csum_partial((void *)pim, sizeof(*pim), 0)) && | |
ec6b486f | 647 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
14fb64e1 YH |
648 | goto drop; |
649 | ||
650 | /* check if the inner packet is destined to mcast group */ | |
651 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + | |
652 | sizeof(*pim)); | |
653 | ||
654 | if (!ipv6_addr_is_multicast(&encap->daddr) || | |
655 | encap->payload_len == 0 || | |
656 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) | |
657 | goto drop; | |
658 | ||
4c9483b2 | 659 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d PM |
660 | goto drop; |
661 | reg_vif_num = mrt->mroute_reg_vif_num; | |
662 | ||
14fb64e1 YH |
663 | read_lock(&mrt_lock); |
664 | if (reg_vif_num >= 0) | |
6bd52143 | 665 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
14fb64e1 YH |
666 | if (reg_dev) |
667 | dev_hold(reg_dev); | |
668 | read_unlock(&mrt_lock); | |
669 | ||
670 | if (reg_dev == NULL) | |
671 | goto drop; | |
672 | ||
673 | skb->mac_header = skb->network_header; | |
674 | skb_pull(skb, (u8 *)encap - skb->data); | |
675 | skb_reset_network_header(skb); | |
1d6e55f1 | 676 | skb->protocol = htons(ETH_P_IPV6); |
3e49e6d5 | 677 | skb->ip_summed = CHECKSUM_NONE; |
14fb64e1 | 678 | skb->pkt_type = PACKET_HOST; |
d19d56dd ED |
679 | |
680 | skb_tunnel_rx(skb, reg_dev); | |
681 | ||
caf586e5 | 682 | netif_rx(skb); |
8990f468 | 683 | |
14fb64e1 YH |
684 | dev_put(reg_dev); |
685 | return 0; | |
686 | drop: | |
687 | kfree_skb(skb); | |
688 | return 0; | |
689 | } | |
690 | ||
41135cc8 | 691 | static const struct inet6_protocol pim6_protocol = { |
14fb64e1 YH |
692 | .handler = pim6_rcv, |
693 | }; | |
694 | ||
695 | /* Service routines creating virtual interfaces: PIMREG */ | |
696 | ||
6fef4c0c SH |
697 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
698 | struct net_device *dev) | |
14fb64e1 | 699 | { |
8229efda | 700 | struct net *net = dev_net(dev); |
d1db275d | 701 | struct mr6_table *mrt; |
4c9483b2 DM |
702 | struct flowi6 fl6 = { |
703 | .flowi6_oif = dev->ifindex, | |
704 | .flowi6_iif = skb->skb_iif, | |
705 | .flowi6_mark = skb->mark, | |
d1db275d PM |
706 | }; |
707 | int err; | |
708 | ||
4c9483b2 | 709 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
67928c40 BG |
710 | if (err < 0) { |
711 | kfree_skb(skb); | |
d1db275d | 712 | return err; |
67928c40 | 713 | } |
8229efda | 714 | |
14fb64e1 | 715 | read_lock(&mrt_lock); |
dc58c78c PE |
716 | dev->stats.tx_bytes += skb->len; |
717 | dev->stats.tx_packets++; | |
6bd52143 | 718 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
14fb64e1 YH |
719 | read_unlock(&mrt_lock); |
720 | kfree_skb(skb); | |
6ed10654 | 721 | return NETDEV_TX_OK; |
14fb64e1 YH |
722 | } |
723 | ||
007c3838 SH |
724 | static const struct net_device_ops reg_vif_netdev_ops = { |
725 | .ndo_start_xmit = reg_vif_xmit, | |
726 | }; | |
727 | ||
14fb64e1 YH |
728 | static void reg_vif_setup(struct net_device *dev) |
729 | { | |
730 | dev->type = ARPHRD_PIMREG; | |
731 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; | |
732 | dev->flags = IFF_NOARP; | |
007c3838 | 733 | dev->netdev_ops = ®_vif_netdev_ops; |
14fb64e1 | 734 | dev->destructor = free_netdev; |
403dbb97 | 735 | dev->features |= NETIF_F_NETNS_LOCAL; |
14fb64e1 YH |
736 | } |
737 | ||
d1db275d | 738 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
14fb64e1 YH |
739 | { |
740 | struct net_device *dev; | |
d1db275d PM |
741 | char name[IFNAMSIZ]; |
742 | ||
743 | if (mrt->id == RT6_TABLE_DFLT) | |
744 | sprintf(name, "pim6reg"); | |
745 | else | |
746 | sprintf(name, "pim6reg%u", mrt->id); | |
14fb64e1 | 747 | |
d1db275d | 748 | dev = alloc_netdev(0, name, reg_vif_setup); |
14fb64e1 YH |
749 | if (dev == NULL) |
750 | return NULL; | |
751 | ||
8229efda BT |
752 | dev_net_set(dev, net); |
753 | ||
14fb64e1 YH |
754 | if (register_netdevice(dev)) { |
755 | free_netdev(dev); | |
756 | return NULL; | |
757 | } | |
758 | dev->iflink = 0; | |
759 | ||
14fb64e1 YH |
760 | if (dev_open(dev)) |
761 | goto failure; | |
762 | ||
7af3db78 | 763 | dev_hold(dev); |
14fb64e1 YH |
764 | return dev; |
765 | ||
766 | failure: | |
767 | /* allow the register to be completed before unregistering. */ | |
768 | rtnl_unlock(); | |
769 | rtnl_lock(); | |
770 | ||
771 | unregister_netdevice(dev); | |
772 | return NULL; | |
773 | } | |
774 | #endif | |
775 | ||
7bc570c8 YH |
776 | /* |
777 | * Delete a VIF entry | |
778 | */ | |
779 | ||
ab93db27 NA |
780 | static int mif6_delete(struct mr6_table *mrt, int vifi, int notify, |
781 | struct list_head *head) | |
7bc570c8 YH |
782 | { |
783 | struct mif_device *v; | |
784 | struct net_device *dev; | |
1d6e55f1 | 785 | struct inet6_dev *in6_dev; |
6bd52143 PM |
786 | |
787 | if (vifi < 0 || vifi >= mrt->maxvif) | |
7bc570c8 YH |
788 | return -EADDRNOTAVAIL; |
789 | ||
6bd52143 | 790 | v = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
791 | |
792 | write_lock_bh(&mrt_lock); | |
793 | dev = v->dev; | |
794 | v->dev = NULL; | |
795 | ||
796 | if (!dev) { | |
797 | write_unlock_bh(&mrt_lock); | |
798 | return -EADDRNOTAVAIL; | |
799 | } | |
800 | ||
14fb64e1 | 801 | #ifdef CONFIG_IPV6_PIMSM_V2 |
6bd52143 PM |
802 | if (vifi == mrt->mroute_reg_vif_num) |
803 | mrt->mroute_reg_vif_num = -1; | |
14fb64e1 YH |
804 | #endif |
805 | ||
6bd52143 | 806 | if (vifi + 1 == mrt->maxvif) { |
7bc570c8 YH |
807 | int tmp; |
808 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
6bd52143 | 809 | if (MIF_EXISTS(mrt, tmp)) |
7bc570c8 YH |
810 | break; |
811 | } | |
6bd52143 | 812 | mrt->maxvif = tmp + 1; |
7bc570c8 YH |
813 | } |
814 | ||
815 | write_unlock_bh(&mrt_lock); | |
816 | ||
817 | dev_set_allmulti(dev, -1); | |
818 | ||
1d6e55f1 | 819 | in6_dev = __in6_dev_get(dev); |
d67b8c61 | 820 | if (in6_dev) { |
1d6e55f1 | 821 | in6_dev->cnf.mc_forwarding--; |
d67b8c61 ND |
822 | inet6_netconf_notify_devconf(dev_net(dev), |
823 | NETCONFA_MC_FORWARDING, | |
824 | dev->ifindex, &in6_dev->cnf); | |
825 | } | |
1d6e55f1 | 826 | |
ab93db27 | 827 | if ((v->flags & MIFF_REGISTER) && !notify) |
c871e664 | 828 | unregister_netdevice_queue(dev, head); |
7bc570c8 YH |
829 | |
830 | dev_put(dev); | |
831 | return 0; | |
832 | } | |
833 | ||
58701ad4 BT |
834 | static inline void ip6mr_cache_free(struct mfc6_cache *c) |
835 | { | |
58701ad4 BT |
836 | kmem_cache_free(mrt_cachep, c); |
837 | } | |
838 | ||
7bc570c8 YH |
839 | /* Destroy an unresolved cache entry, killing queued skbs |
840 | and reporting error to netlink readers. | |
841 | */ | |
842 | ||
6bd52143 | 843 | static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) |
7bc570c8 | 844 | { |
6bd52143 | 845 | struct net *net = read_pnet(&mrt->net); |
7bc570c8 YH |
846 | struct sk_buff *skb; |
847 | ||
6bd52143 | 848 | atomic_dec(&mrt->cache_resolve_queue_len); |
7bc570c8 YH |
849 | |
850 | while((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { | |
851 | if (ipv6_hdr(skb)->version == 0) { | |
852 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); | |
853 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 854 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 855 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 856 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; |
15e47304 | 857 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 YH |
858 | } else |
859 | kfree_skb(skb); | |
860 | } | |
861 | ||
58701ad4 | 862 | ip6mr_cache_free(c); |
7bc570c8 YH |
863 | } |
864 | ||
865 | ||
c476efbc | 866 | /* Timer process for all the unresolved queue. */ |
7bc570c8 | 867 | |
6bd52143 | 868 | static void ipmr_do_expire_process(struct mr6_table *mrt) |
7bc570c8 YH |
869 | { |
870 | unsigned long now = jiffies; | |
871 | unsigned long expires = 10 * HZ; | |
f30a7784 | 872 | struct mfc6_cache *c, *next; |
7bc570c8 | 873 | |
6bd52143 | 874 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
7bc570c8 YH |
875 | if (time_after(c->mfc_un.unres.expires, now)) { |
876 | /* not yet... */ | |
877 | unsigned long interval = c->mfc_un.unres.expires - now; | |
878 | if (interval < expires) | |
879 | expires = interval; | |
7bc570c8 YH |
880 | continue; |
881 | } | |
882 | ||
f30a7784 | 883 | list_del(&c->list); |
812e44dd | 884 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 885 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
886 | } |
887 | ||
6bd52143 PM |
888 | if (!list_empty(&mrt->mfc6_unres_queue)) |
889 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
7bc570c8 YH |
890 | } |
891 | ||
c476efbc | 892 | static void ipmr_expire_process(unsigned long arg) |
7bc570c8 | 893 | { |
6bd52143 | 894 | struct mr6_table *mrt = (struct mr6_table *)arg; |
c476efbc | 895 | |
7bc570c8 | 896 | if (!spin_trylock(&mfc_unres_lock)) { |
6bd52143 | 897 | mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); |
7bc570c8 YH |
898 | return; |
899 | } | |
900 | ||
6bd52143 PM |
901 | if (!list_empty(&mrt->mfc6_unres_queue)) |
902 | ipmr_do_expire_process(mrt); | |
7bc570c8 YH |
903 | |
904 | spin_unlock(&mfc_unres_lock); | |
905 | } | |
906 | ||
907 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
908 | ||
6bd52143 | 909 | static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, |
b5aa30b1 | 910 | unsigned char *ttls) |
7bc570c8 YH |
911 | { |
912 | int vifi; | |
913 | ||
6ac7eb08 | 914 | cache->mfc_un.res.minvif = MAXMIFS; |
7bc570c8 | 915 | cache->mfc_un.res.maxvif = 0; |
6ac7eb08 | 916 | memset(cache->mfc_un.res.ttls, 255, MAXMIFS); |
7bc570c8 | 917 | |
6bd52143 PM |
918 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
919 | if (MIF_EXISTS(mrt, vifi) && | |
4e16880c | 920 | ttls[vifi] && ttls[vifi] < 255) { |
7bc570c8 YH |
921 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
922 | if (cache->mfc_un.res.minvif > vifi) | |
923 | cache->mfc_un.res.minvif = vifi; | |
924 | if (cache->mfc_un.res.maxvif <= vifi) | |
925 | cache->mfc_un.res.maxvif = vifi + 1; | |
926 | } | |
927 | } | |
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++; |
d67b8c61 ND |
980 | inet6_netconf_notify_devconf(dev_net(dev), |
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) | |
999 | v->link = dev->iflink; | |
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); |
7bc570c8 YH |
1079 | if (c == NULL) |
1080 | return NULL; | |
23f2a4ce | 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); |
7bc570c8 YH |
1089 | if (c == NULL) |
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 | ||
1109 | while((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { | |
1110 | if (ipv6_hdr(skb)->version == 0) { | |
7bc570c8 YH |
1111 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); |
1112 | ||
573ce260 | 1113 | if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
549e028d | 1114 | nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; |
7bc570c8 YH |
1115 | } else { |
1116 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1117 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
7bc570c8 | 1118 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1119 | ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; |
7bc570c8 | 1120 | } |
15e47304 | 1121 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
7bc570c8 | 1122 | } else |
6bd52143 | 1123 | ip6_mr_forward(net, mrt, skb, c); |
7bc570c8 YH |
1124 | } |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd | |
1129 | * expects the following bizarre scheme. | |
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 | |
6bd52143 | 1206 | if (mrt->mroute6_sk == NULL) { |
7bc570c8 YH |
1207 | kfree_skb(skb); |
1208 | return -EINVAL; | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * Deliver to user space multicast routing algorithms | |
1213 | */ | |
6bd52143 | 1214 | ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); |
bd91b8bf | 1215 | if (ret < 0) { |
e87cc472 | 1216 | net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); |
7bc570c8 YH |
1217 | kfree_skb(skb); |
1218 | } | |
1219 | ||
1220 | return ret; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Queue a packet for resolution. It gets locked cache entry! | |
1225 | */ | |
1226 | ||
1227 | static int | |
6bd52143 | 1228 | ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) |
7bc570c8 | 1229 | { |
f30a7784 | 1230 | bool found = false; |
7bc570c8 YH |
1231 | int err; |
1232 | struct mfc6_cache *c; | |
1233 | ||
1234 | spin_lock_bh(&mfc_unres_lock); | |
6bd52143 | 1235 | list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1236 | if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && |
f30a7784 PM |
1237 | ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { |
1238 | found = true; | |
7bc570c8 | 1239 | break; |
f30a7784 | 1240 | } |
7bc570c8 YH |
1241 | } |
1242 | ||
f30a7784 | 1243 | if (!found) { |
7bc570c8 YH |
1244 | /* |
1245 | * Create a new entry if allowable | |
1246 | */ | |
1247 | ||
6bd52143 | 1248 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
b5aa30b1 | 1249 | (c = ip6mr_cache_alloc_unres()) == NULL) { |
7bc570c8 YH |
1250 | spin_unlock_bh(&mfc_unres_lock); |
1251 | ||
1252 | kfree_skb(skb); | |
1253 | return -ENOBUFS; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Fill in the new cache entry | |
1258 | */ | |
1259 | c->mf6c_parent = -1; | |
1260 | c->mf6c_origin = ipv6_hdr(skb)->saddr; | |
1261 | c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; | |
1262 | ||
1263 | /* | |
1264 | * Reflect first query at pim6sd | |
1265 | */ | |
6bd52143 | 1266 | err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); |
8229efda | 1267 | if (err < 0) { |
7bc570c8 YH |
1268 | /* If the report failed throw the cache entry |
1269 | out - Brad Parker | |
1270 | */ | |
1271 | spin_unlock_bh(&mfc_unres_lock); | |
1272 | ||
58701ad4 | 1273 | ip6mr_cache_free(c); |
7bc570c8 YH |
1274 | kfree_skb(skb); |
1275 | return err; | |
1276 | } | |
1277 | ||
6bd52143 PM |
1278 | atomic_inc(&mrt->cache_resolve_queue_len); |
1279 | list_add(&c->list, &mrt->mfc6_unres_queue); | |
812e44dd | 1280 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 | 1281 | |
6bd52143 | 1282 | ipmr_do_expire_process(mrt); |
7bc570c8 YH |
1283 | } |
1284 | ||
1285 | /* | |
1286 | * See if we can append the packet | |
1287 | */ | |
1288 | if (c->mfc_un.unres.unresolved.qlen > 3) { | |
1289 | kfree_skb(skb); | |
1290 | err = -ENOBUFS; | |
1291 | } else { | |
1292 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); | |
1293 | err = 0; | |
1294 | } | |
1295 | ||
1296 | spin_unlock_bh(&mfc_unres_lock); | |
1297 | return err; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * MFC6 cache manipulation by user space | |
1302 | */ | |
1303 | ||
660b26dc ND |
1304 | static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, |
1305 | int parent) | |
7bc570c8 YH |
1306 | { |
1307 | int line; | |
f30a7784 | 1308 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1309 | |
1310 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1311 | ||
6bd52143 | 1312 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1313 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1314 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1315 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1316 | (parent == -1 || parent == c->mf6c_parent)) { | |
7bc570c8 | 1317 | write_lock_bh(&mrt_lock); |
f30a7784 | 1318 | list_del(&c->list); |
7bc570c8 YH |
1319 | write_unlock_bh(&mrt_lock); |
1320 | ||
812e44dd | 1321 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1322 | ip6mr_cache_free(c); |
7bc570c8 YH |
1323 | return 0; |
1324 | } | |
1325 | } | |
1326 | return -ENOENT; | |
1327 | } | |
1328 | ||
1329 | static int ip6mr_device_event(struct notifier_block *this, | |
1330 | unsigned long event, void *ptr) | |
1331 | { | |
1332 | struct net_device *dev = ptr; | |
8229efda | 1333 | struct net *net = dev_net(dev); |
d1db275d | 1334 | struct mr6_table *mrt; |
7bc570c8 YH |
1335 | struct mif_device *v; |
1336 | int ct; | |
1337 | ||
7bc570c8 YH |
1338 | if (event != NETDEV_UNREGISTER) |
1339 | return NOTIFY_DONE; | |
1340 | ||
d1db275d PM |
1341 | ip6mr_for_each_table(mrt, net) { |
1342 | v = &mrt->vif6_table[0]; | |
1343 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1344 | if (v->dev == dev) | |
ab93db27 | 1345 | mif6_delete(mrt, ct, 1, NULL); |
d1db275d | 1346 | } |
7bc570c8 | 1347 | } |
c871e664 | 1348 | |
7bc570c8 YH |
1349 | return NOTIFY_DONE; |
1350 | } | |
1351 | ||
1352 | static struct notifier_block ip6_mr_notifier = { | |
1353 | .notifier_call = ip6mr_device_event | |
1354 | }; | |
1355 | ||
1356 | /* | |
1357 | * Setup for IP multicast routing | |
1358 | */ | |
1359 | ||
4e16880c BT |
1360 | static int __net_init ip6mr_net_init(struct net *net) |
1361 | { | |
d1db275d | 1362 | int err; |
f30a7784 | 1363 | |
d1db275d PM |
1364 | err = ip6mr_rules_init(net); |
1365 | if (err < 0) | |
4e16880c | 1366 | goto fail; |
8b90fc7e BT |
1367 | |
1368 | #ifdef CONFIG_PROC_FS | |
1369 | err = -ENOMEM; | |
d4beaa66 | 1370 | if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) |
8b90fc7e | 1371 | goto proc_vif_fail; |
d4beaa66 | 1372 | if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) |
8b90fc7e BT |
1373 | goto proc_cache_fail; |
1374 | #endif | |
6bd52143 | 1375 | |
4a6258a0 BT |
1376 | return 0; |
1377 | ||
8b90fc7e BT |
1378 | #ifdef CONFIG_PROC_FS |
1379 | proc_cache_fail: | |
ece31ffd | 1380 | remove_proc_entry("ip6_mr_vif", net->proc_net); |
8b90fc7e | 1381 | proc_vif_fail: |
d1db275d | 1382 | ip6mr_rules_exit(net); |
8b90fc7e | 1383 | #endif |
4e16880c BT |
1384 | fail: |
1385 | return err; | |
1386 | } | |
1387 | ||
1388 | static void __net_exit ip6mr_net_exit(struct net *net) | |
1389 | { | |
8b90fc7e | 1390 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
1391 | remove_proc_entry("ip6_mr_cache", net->proc_net); |
1392 | remove_proc_entry("ip6_mr_vif", net->proc_net); | |
8b90fc7e | 1393 | #endif |
d1db275d | 1394 | ip6mr_rules_exit(net); |
4e16880c BT |
1395 | } |
1396 | ||
1397 | static struct pernet_operations ip6mr_net_ops = { | |
1398 | .init = ip6mr_net_init, | |
1399 | .exit = ip6mr_net_exit, | |
1400 | }; | |
1401 | ||
623d1a1a | 1402 | int __init ip6_mr_init(void) |
7bc570c8 | 1403 | { |
623d1a1a WC |
1404 | int err; |
1405 | ||
7bc570c8 YH |
1406 | mrt_cachep = kmem_cache_create("ip6_mrt_cache", |
1407 | sizeof(struct mfc6_cache), | |
1408 | 0, SLAB_HWCACHE_ALIGN, | |
1409 | NULL); | |
1410 | if (!mrt_cachep) | |
623d1a1a | 1411 | return -ENOMEM; |
7bc570c8 | 1412 | |
4e16880c BT |
1413 | err = register_pernet_subsys(&ip6mr_net_ops); |
1414 | if (err) | |
1415 | goto reg_pernet_fail; | |
1416 | ||
623d1a1a WC |
1417 | err = register_netdevice_notifier(&ip6_mr_notifier); |
1418 | if (err) | |
1419 | goto reg_notif_fail; | |
403dbb97 TG |
1420 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1421 | if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { | |
f3213831 | 1422 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
1423 | err = -EAGAIN; |
1424 | goto add_proto_fail; | |
1425 | } | |
1426 | #endif | |
c7ac8679 GR |
1427 | rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, |
1428 | ip6mr_rtm_dumproute, NULL); | |
623d1a1a | 1429 | return 0; |
403dbb97 TG |
1430 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1431 | add_proto_fail: | |
1432 | unregister_netdevice_notifier(&ip6_mr_notifier); | |
1433 | #endif | |
87b30a65 | 1434 | reg_notif_fail: |
4e16880c BT |
1435 | unregister_pernet_subsys(&ip6mr_net_ops); |
1436 | reg_pernet_fail: | |
87b30a65 | 1437 | kmem_cache_destroy(mrt_cachep); |
623d1a1a | 1438 | return err; |
7bc570c8 YH |
1439 | } |
1440 | ||
623d1a1a WC |
1441 | void ip6_mr_cleanup(void) |
1442 | { | |
623d1a1a | 1443 | unregister_netdevice_notifier(&ip6_mr_notifier); |
4e16880c | 1444 | unregister_pernet_subsys(&ip6mr_net_ops); |
623d1a1a WC |
1445 | kmem_cache_destroy(mrt_cachep); |
1446 | } | |
7bc570c8 | 1447 | |
6bd52143 | 1448 | static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, |
660b26dc | 1449 | struct mf6cctl *mfc, int mrtsock, int parent) |
7bc570c8 | 1450 | { |
f30a7784 | 1451 | bool found = false; |
7bc570c8 | 1452 | int line; |
f30a7784 | 1453 | struct mfc6_cache *uc, *c; |
6ac7eb08 | 1454 | unsigned char ttls[MAXMIFS]; |
7bc570c8 YH |
1455 | int i; |
1456 | ||
a50436f2 PM |
1457 | if (mfc->mf6cc_parent >= MAXMIFS) |
1458 | return -ENFILE; | |
1459 | ||
6ac7eb08 RR |
1460 | memset(ttls, 255, MAXMIFS); |
1461 | for (i = 0; i < MAXMIFS; i++) { | |
7bc570c8 YH |
1462 | if (IF_ISSET(i, &mfc->mf6cc_ifset)) |
1463 | ttls[i] = 1; | |
1464 | ||
1465 | } | |
1466 | ||
1467 | line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); | |
1468 | ||
6bd52143 | 1469 | list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { |
7bc570c8 | 1470 | if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && |
660b26dc ND |
1471 | ipv6_addr_equal(&c->mf6c_mcastgrp, |
1472 | &mfc->mf6cc_mcastgrp.sin6_addr) && | |
1473 | (parent == -1 || parent == mfc->mf6cc_parent)) { | |
f30a7784 | 1474 | found = true; |
7bc570c8 | 1475 | break; |
f30a7784 | 1476 | } |
7bc570c8 YH |
1477 | } |
1478 | ||
f30a7784 | 1479 | if (found) { |
7bc570c8 YH |
1480 | write_lock_bh(&mrt_lock); |
1481 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1482 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1483 | if (!mrtsock) |
1484 | c->mfc_flags |= MFC_STATIC; | |
1485 | write_unlock_bh(&mrt_lock); | |
812e44dd | 1486 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1487 | return 0; |
1488 | } | |
1489 | ||
660b26dc ND |
1490 | if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && |
1491 | !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) | |
7bc570c8 YH |
1492 | return -EINVAL; |
1493 | ||
b5aa30b1 | 1494 | c = ip6mr_cache_alloc(); |
7bc570c8 YH |
1495 | if (c == NULL) |
1496 | return -ENOMEM; | |
1497 | ||
1498 | c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; | |
1499 | c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; | |
1500 | c->mf6c_parent = mfc->mf6cc_parent; | |
6bd52143 | 1501 | ip6mr_update_thresholds(mrt, c, ttls); |
7bc570c8 YH |
1502 | if (!mrtsock) |
1503 | c->mfc_flags |= MFC_STATIC; | |
1504 | ||
1505 | write_lock_bh(&mrt_lock); | |
6bd52143 | 1506 | list_add(&c->list, &mrt->mfc6_cache_array[line]); |
7bc570c8 YH |
1507 | write_unlock_bh(&mrt_lock); |
1508 | ||
1509 | /* | |
1510 | * Check to see if we resolved a queued list. If so we | |
1511 | * need to send on the frames and tidy up. | |
1512 | */ | |
f30a7784 | 1513 | found = false; |
7bc570c8 | 1514 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1515 | list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { |
c476efbc | 1516 | if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && |
7bc570c8 | 1517 | ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { |
f30a7784 | 1518 | list_del(&uc->list); |
6bd52143 | 1519 | atomic_dec(&mrt->cache_resolve_queue_len); |
f30a7784 | 1520 | found = true; |
7bc570c8 YH |
1521 | break; |
1522 | } | |
1523 | } | |
6bd52143 PM |
1524 | if (list_empty(&mrt->mfc6_unres_queue)) |
1525 | del_timer(&mrt->ipmr_expire_timer); | |
7bc570c8 YH |
1526 | spin_unlock_bh(&mfc_unres_lock); |
1527 | ||
f30a7784 | 1528 | if (found) { |
6bd52143 | 1529 | ip6mr_cache_resolve(net, mrt, uc, c); |
58701ad4 | 1530 | ip6mr_cache_free(uc); |
7bc570c8 | 1531 | } |
812e44dd | 1532 | mr6_netlink_event(mrt, c, RTM_NEWROUTE); |
7bc570c8 YH |
1533 | return 0; |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Close the multicast socket, and clear the vif tables etc | |
1538 | */ | |
1539 | ||
07ea536a | 1540 | static void mroute_clean_tables(struct mr6_table *mrt, bool all) |
7bc570c8 YH |
1541 | { |
1542 | int i; | |
c871e664 | 1543 | LIST_HEAD(list); |
f30a7784 | 1544 | struct mfc6_cache *c, *next; |
7bc570c8 YH |
1545 | |
1546 | /* | |
1547 | * Shut down all active vif entries | |
1548 | */ | |
6bd52143 | 1549 | for (i = 0; i < mrt->maxvif; i++) { |
07ea536a NA |
1550 | if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) |
1551 | continue; | |
ab93db27 | 1552 | mif6_delete(mrt, i, 0, &list); |
7bc570c8 | 1553 | } |
c871e664 | 1554 | unregister_netdevice_many(&list); |
7bc570c8 YH |
1555 | |
1556 | /* | |
1557 | * Wipe the cache | |
1558 | */ | |
4a6258a0 | 1559 | for (i = 0; i < MFC6_LINES; i++) { |
6bd52143 | 1560 | list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { |
07ea536a | 1561 | if (!all && (c->mfc_flags & MFC_STATIC)) |
7bc570c8 | 1562 | continue; |
7bc570c8 | 1563 | write_lock_bh(&mrt_lock); |
f30a7784 | 1564 | list_del(&c->list); |
7bc570c8 YH |
1565 | write_unlock_bh(&mrt_lock); |
1566 | ||
812e44dd | 1567 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
58701ad4 | 1568 | ip6mr_cache_free(c); |
7bc570c8 YH |
1569 | } |
1570 | } | |
1571 | ||
6bd52143 | 1572 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
7bc570c8 | 1573 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 1574 | list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { |
f30a7784 | 1575 | list_del(&c->list); |
812e44dd | 1576 | mr6_netlink_event(mrt, c, RTM_DELROUTE); |
6bd52143 | 1577 | ip6mr_destroy_unres(mrt, c); |
7bc570c8 YH |
1578 | } |
1579 | spin_unlock_bh(&mfc_unres_lock); | |
1580 | } | |
1581 | } | |
1582 | ||
6bd52143 | 1583 | static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) |
7bc570c8 YH |
1584 | { |
1585 | int err = 0; | |
8229efda | 1586 | struct net *net = sock_net(sk); |
7bc570c8 YH |
1587 | |
1588 | rtnl_lock(); | |
1589 | write_lock_bh(&mrt_lock); | |
6bd52143 PM |
1590 | if (likely(mrt->mroute6_sk == NULL)) { |
1591 | mrt->mroute6_sk = sk; | |
1d6e55f1 | 1592 | net->ipv6.devconf_all->mc_forwarding++; |
d67b8c61 ND |
1593 | inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
1594 | NETCONFA_IFINDEX_ALL, | |
1595 | net->ipv6.devconf_all); | |
1d6e55f1 | 1596 | } |
7bc570c8 YH |
1597 | else |
1598 | err = -EADDRINUSE; | |
1599 | write_unlock_bh(&mrt_lock); | |
1600 | ||
1601 | rtnl_unlock(); | |
1602 | ||
1603 | return err; | |
1604 | } | |
1605 | ||
1606 | int ip6mr_sk_done(struct sock *sk) | |
1607 | { | |
d1db275d | 1608 | int err = -EACCES; |
8229efda | 1609 | struct net *net = sock_net(sk); |
d1db275d | 1610 | struct mr6_table *mrt; |
7bc570c8 YH |
1611 | |
1612 | rtnl_lock(); | |
d1db275d PM |
1613 | ip6mr_for_each_table(mrt, net) { |
1614 | if (sk == mrt->mroute6_sk) { | |
1615 | write_lock_bh(&mrt_lock); | |
1616 | mrt->mroute6_sk = NULL; | |
1617 | net->ipv6.devconf_all->mc_forwarding--; | |
d67b8c61 ND |
1618 | inet6_netconf_notify_devconf(net, |
1619 | NETCONFA_MC_FORWARDING, | |
1620 | NETCONFA_IFINDEX_ALL, | |
1621 | net->ipv6.devconf_all); | |
d1db275d | 1622 | write_unlock_bh(&mrt_lock); |
7bc570c8 | 1623 | |
07ea536a | 1624 | mroute_clean_tables(mrt, false); |
d1db275d PM |
1625 | err = 0; |
1626 | break; | |
1627 | } | |
1628 | } | |
7bc570c8 YH |
1629 | rtnl_unlock(); |
1630 | ||
1631 | return err; | |
1632 | } | |
1633 | ||
d1db275d | 1634 | struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) |
6bd52143 | 1635 | { |
d1db275d | 1636 | struct mr6_table *mrt; |
4c9483b2 DM |
1637 | struct flowi6 fl6 = { |
1638 | .flowi6_iif = skb->skb_iif, | |
1639 | .flowi6_oif = skb->dev->ifindex, | |
1640 | .flowi6_mark = skb->mark, | |
d1db275d PM |
1641 | }; |
1642 | ||
4c9483b2 | 1643 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d | 1644 | return NULL; |
6bd52143 PM |
1645 | |
1646 | return mrt->mroute6_sk; | |
1647 | } | |
1648 | ||
7bc570c8 YH |
1649 | /* |
1650 | * Socket options and virtual interface manipulation. The whole | |
1651 | * virtual interface system is a complete heap, but unfortunately | |
1652 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1653 | * MOSPF/PIM router set up we can clean this up. | |
1654 | */ | |
1655 | ||
b7058842 | 1656 | int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
7bc570c8 | 1657 | { |
660b26dc | 1658 | int ret, parent = 0; |
7bc570c8 YH |
1659 | struct mif6ctl vif; |
1660 | struct mf6cctl mfc; | |
1661 | mifi_t mifi; | |
8229efda | 1662 | struct net *net = sock_net(sk); |
d1db275d PM |
1663 | struct mr6_table *mrt; |
1664 | ||
1665 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
1666 | if (mrt == NULL) | |
1667 | return -ENOENT; | |
7bc570c8 YH |
1668 | |
1669 | if (optname != MRT6_INIT) { | |
af31f412 | 1670 | if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
7bc570c8 YH |
1671 | return -EACCES; |
1672 | } | |
1673 | ||
1674 | switch (optname) { | |
1675 | case MRT6_INIT: | |
1676 | if (sk->sk_type != SOCK_RAW || | |
c720c7e8 | 1677 | inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
7bc570c8 YH |
1678 | return -EOPNOTSUPP; |
1679 | if (optlen < sizeof(int)) | |
1680 | return -EINVAL; | |
1681 | ||
6bd52143 | 1682 | return ip6mr_sk_init(mrt, sk); |
7bc570c8 YH |
1683 | |
1684 | case MRT6_DONE: | |
1685 | return ip6mr_sk_done(sk); | |
1686 | ||
1687 | case MRT6_ADD_MIF: | |
1688 | if (optlen < sizeof(vif)) | |
1689 | return -EINVAL; | |
1690 | if (copy_from_user(&vif, optval, sizeof(vif))) | |
1691 | return -EFAULT; | |
6ac7eb08 | 1692 | if (vif.mif6c_mifi >= MAXMIFS) |
7bc570c8 YH |
1693 | return -ENFILE; |
1694 | rtnl_lock(); | |
6bd52143 | 1695 | ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); |
7bc570c8 YH |
1696 | rtnl_unlock(); |
1697 | return ret; | |
1698 | ||
1699 | case MRT6_DEL_MIF: | |
1700 | if (optlen < sizeof(mifi_t)) | |
1701 | return -EINVAL; | |
1702 | if (copy_from_user(&mifi, optval, sizeof(mifi_t))) | |
1703 | return -EFAULT; | |
1704 | rtnl_lock(); | |
ab93db27 | 1705 | ret = mif6_delete(mrt, mifi, 0, NULL); |
7bc570c8 YH |
1706 | rtnl_unlock(); |
1707 | return ret; | |
1708 | ||
1709 | /* | |
1710 | * Manipulate the forwarding caches. These live | |
1711 | * in a sort of kernel/user symbiosis. | |
1712 | */ | |
1713 | case MRT6_ADD_MFC: | |
1714 | case MRT6_DEL_MFC: | |
660b26dc ND |
1715 | parent = -1; |
1716 | case MRT6_ADD_MFC_PROXY: | |
1717 | case MRT6_DEL_MFC_PROXY: | |
7bc570c8 YH |
1718 | if (optlen < sizeof(mfc)) |
1719 | return -EINVAL; | |
1720 | if (copy_from_user(&mfc, optval, sizeof(mfc))) | |
1721 | return -EFAULT; | |
660b26dc ND |
1722 | if (parent == 0) |
1723 | parent = mfc.mf6cc_parent; | |
7bc570c8 | 1724 | rtnl_lock(); |
660b26dc ND |
1725 | if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) |
1726 | ret = ip6mr_mfc_delete(mrt, &mfc, parent); | |
7bc570c8 | 1727 | else |
660b26dc ND |
1728 | ret = ip6mr_mfc_add(net, mrt, &mfc, |
1729 | sk == mrt->mroute6_sk, parent); | |
7bc570c8 YH |
1730 | rtnl_unlock(); |
1731 | return ret; | |
1732 | ||
14fb64e1 YH |
1733 | /* |
1734 | * Control PIM assert (to activate pim will activate assert) | |
1735 | */ | |
1736 | case MRT6_ASSERT: | |
1737 | { | |
1738 | int v; | |
03f52a0a JP |
1739 | |
1740 | if (optlen != sizeof(v)) | |
1741 | return -EINVAL; | |
14fb64e1 YH |
1742 | if (get_user(v, (int __user *)optval)) |
1743 | return -EFAULT; | |
53d6841d | 1744 | mrt->mroute_do_assert = v; |
14fb64e1 YH |
1745 | return 0; |
1746 | } | |
1747 | ||
1748 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
1749 | case MRT6_PIM: | |
1750 | { | |
a9f83bf3 | 1751 | int v; |
03f52a0a JP |
1752 | |
1753 | if (optlen != sizeof(v)) | |
1754 | return -EINVAL; | |
14fb64e1 YH |
1755 | if (get_user(v, (int __user *)optval)) |
1756 | return -EFAULT; | |
1757 | v = !!v; | |
1758 | rtnl_lock(); | |
1759 | ret = 0; | |
6bd52143 PM |
1760 | if (v != mrt->mroute_do_pim) { |
1761 | mrt->mroute_do_pim = v; | |
1762 | mrt->mroute_do_assert = v; | |
14fb64e1 YH |
1763 | } |
1764 | rtnl_unlock(); | |
1765 | return ret; | |
1766 | } | |
1767 | ||
d1db275d PM |
1768 | #endif |
1769 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
1770 | case MRT6_TABLE: | |
1771 | { | |
1772 | u32 v; | |
1773 | ||
1774 | if (optlen != sizeof(u32)) | |
1775 | return -EINVAL; | |
1776 | if (get_user(v, (u32 __user *)optval)) | |
1777 | return -EFAULT; | |
75356a81 DC |
1778 | /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
1779 | if (v != RT_TABLE_DEFAULT && v >= 100000000) | |
1780 | return -EINVAL; | |
d1db275d PM |
1781 | if (sk == mrt->mroute6_sk) |
1782 | return -EBUSY; | |
1783 | ||
1784 | rtnl_lock(); | |
1785 | ret = 0; | |
1786 | if (!ip6mr_new_table(net, v)) | |
1787 | ret = -ENOMEM; | |
1788 | raw6_sk(sk)->ip6mr_table = v; | |
1789 | rtnl_unlock(); | |
1790 | return ret; | |
1791 | } | |
14fb64e1 | 1792 | #endif |
7bc570c8 | 1793 | /* |
7d120c55 | 1794 | * Spurious command, or MRT6_VERSION which you cannot |
7bc570c8 YH |
1795 | * set. |
1796 | */ | |
1797 | default: | |
1798 | return -ENOPROTOOPT; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * Getsock opt support for the multicast routing system. | |
1804 | */ | |
1805 | ||
1806 | int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, | |
1807 | int __user *optlen) | |
1808 | { | |
1809 | int olr; | |
1810 | int val; | |
8229efda | 1811 | struct net *net = sock_net(sk); |
d1db275d PM |
1812 | struct mr6_table *mrt; |
1813 | ||
1814 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
1815 | if (mrt == NULL) | |
1816 | return -ENOENT; | |
7bc570c8 YH |
1817 | |
1818 | switch (optname) { | |
1819 | case MRT6_VERSION: | |
1820 | val = 0x0305; | |
1821 | break; | |
14fb64e1 YH |
1822 | #ifdef CONFIG_IPV6_PIMSM_V2 |
1823 | case MRT6_PIM: | |
6bd52143 | 1824 | val = mrt->mroute_do_pim; |
14fb64e1 YH |
1825 | break; |
1826 | #endif | |
1827 | case MRT6_ASSERT: | |
6bd52143 | 1828 | val = mrt->mroute_do_assert; |
14fb64e1 | 1829 | break; |
7bc570c8 YH |
1830 | default: |
1831 | return -ENOPROTOOPT; | |
1832 | } | |
1833 | ||
1834 | if (get_user(olr, optlen)) | |
1835 | return -EFAULT; | |
1836 | ||
1837 | olr = min_t(int, olr, sizeof(int)); | |
1838 | if (olr < 0) | |
1839 | return -EINVAL; | |
1840 | ||
1841 | if (put_user(olr, optlen)) | |
1842 | return -EFAULT; | |
1843 | if (copy_to_user(optval, &val, olr)) | |
1844 | return -EFAULT; | |
1845 | return 0; | |
1846 | } | |
1847 | ||
1848 | /* | |
1849 | * The IP multicast ioctl support routines. | |
1850 | */ | |
1851 | ||
1852 | int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) | |
1853 | { | |
1854 | struct sioc_sg_req6 sr; | |
1855 | struct sioc_mif_req6 vr; | |
1856 | struct mif_device *vif; | |
1857 | struct mfc6_cache *c; | |
8229efda | 1858 | struct net *net = sock_net(sk); |
d1db275d PM |
1859 | struct mr6_table *mrt; |
1860 | ||
1861 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
1862 | if (mrt == NULL) | |
1863 | return -ENOENT; | |
7bc570c8 YH |
1864 | |
1865 | switch (cmd) { | |
1866 | case SIOCGETMIFCNT_IN6: | |
1867 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1868 | return -EFAULT; | |
6bd52143 | 1869 | if (vr.mifi >= mrt->maxvif) |
7bc570c8 YH |
1870 | return -EINVAL; |
1871 | read_lock(&mrt_lock); | |
6bd52143 PM |
1872 | vif = &mrt->vif6_table[vr.mifi]; |
1873 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
7bc570c8 YH |
1874 | vr.icount = vif->pkt_in; |
1875 | vr.ocount = vif->pkt_out; | |
1876 | vr.ibytes = vif->bytes_in; | |
1877 | vr.obytes = vif->bytes_out; | |
1878 | read_unlock(&mrt_lock); | |
1879 | ||
1880 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1881 | return -EFAULT; | |
1882 | return 0; | |
1883 | } | |
1884 | read_unlock(&mrt_lock); | |
1885 | return -EADDRNOTAVAIL; | |
1886 | case SIOCGETSGCNT_IN6: | |
1887 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1888 | return -EFAULT; | |
1889 | ||
1890 | read_lock(&mrt_lock); | |
6bd52143 | 1891 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); |
7bc570c8 YH |
1892 | if (c) { |
1893 | sr.pktcnt = c->mfc_un.res.pkt; | |
1894 | sr.bytecnt = c->mfc_un.res.bytes; | |
1895 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1896 | read_unlock(&mrt_lock); | |
1897 | ||
1898 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1899 | return -EFAULT; | |
1900 | return 0; | |
1901 | } | |
1902 | read_unlock(&mrt_lock); | |
1903 | return -EADDRNOTAVAIL; | |
1904 | default: | |
1905 | return -ENOIOCTLCMD; | |
1906 | } | |
1907 | } | |
1908 | ||
e2d57766 DM |
1909 | #ifdef CONFIG_COMPAT |
1910 | struct compat_sioc_sg_req6 { | |
1911 | struct sockaddr_in6 src; | |
1912 | struct sockaddr_in6 grp; | |
1913 | compat_ulong_t pktcnt; | |
1914 | compat_ulong_t bytecnt; | |
1915 | compat_ulong_t wrong_if; | |
1916 | }; | |
1917 | ||
1918 | struct compat_sioc_mif_req6 { | |
1919 | mifi_t mifi; | |
1920 | compat_ulong_t icount; | |
1921 | compat_ulong_t ocount; | |
1922 | compat_ulong_t ibytes; | |
1923 | compat_ulong_t obytes; | |
1924 | }; | |
1925 | ||
1926 | int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) | |
1927 | { | |
1928 | struct compat_sioc_sg_req6 sr; | |
1929 | struct compat_sioc_mif_req6 vr; | |
1930 | struct mif_device *vif; | |
1931 | struct mfc6_cache *c; | |
1932 | struct net *net = sock_net(sk); | |
1933 | struct mr6_table *mrt; | |
1934 | ||
1935 | mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); | |
1936 | if (mrt == NULL) | |
1937 | return -ENOENT; | |
1938 | ||
1939 | switch (cmd) { | |
1940 | case SIOCGETMIFCNT_IN6: | |
1941 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1942 | return -EFAULT; | |
1943 | if (vr.mifi >= mrt->maxvif) | |
1944 | return -EINVAL; | |
1945 | read_lock(&mrt_lock); | |
1946 | vif = &mrt->vif6_table[vr.mifi]; | |
1947 | if (MIF_EXISTS(mrt, vr.mifi)) { | |
1948 | vr.icount = vif->pkt_in; | |
1949 | vr.ocount = vif->pkt_out; | |
1950 | vr.ibytes = vif->bytes_in; | |
1951 | vr.obytes = vif->bytes_out; | |
1952 | read_unlock(&mrt_lock); | |
1953 | ||
1954 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1955 | return -EFAULT; | |
1956 | return 0; | |
1957 | } | |
1958 | read_unlock(&mrt_lock); | |
1959 | return -EADDRNOTAVAIL; | |
1960 | case SIOCGETSGCNT_IN6: | |
1961 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1962 | return -EFAULT; | |
1963 | ||
1964 | read_lock(&mrt_lock); | |
1965 | c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); | |
1966 | if (c) { | |
1967 | sr.pktcnt = c->mfc_un.res.pkt; | |
1968 | sr.bytecnt = c->mfc_un.res.bytes; | |
1969 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1970 | read_unlock(&mrt_lock); | |
1971 | ||
1972 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1973 | return -EFAULT; | |
1974 | return 0; | |
1975 | } | |
1976 | read_unlock(&mrt_lock); | |
1977 | return -EADDRNOTAVAIL; | |
1978 | default: | |
1979 | return -ENOIOCTLCMD; | |
1980 | } | |
1981 | } | |
1982 | #endif | |
7bc570c8 YH |
1983 | |
1984 | static inline int ip6mr_forward2_finish(struct sk_buff *skb) | |
1985 | { | |
adf30907 | 1986 | IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)), |
483a47d2 | 1987 | IPSTATS_MIB_OUTFORWDATAGRAMS); |
2d8dbb04 VB |
1988 | IP6_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)), |
1989 | IPSTATS_MIB_OUTOCTETS, skb->len); | |
7bc570c8 YH |
1990 | return dst_output(skb); |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * Processing handlers for ip6mr_forward | |
1995 | */ | |
1996 | ||
6bd52143 PM |
1997 | static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, |
1998 | struct sk_buff *skb, struct mfc6_cache *c, int vifi) | |
7bc570c8 YH |
1999 | { |
2000 | struct ipv6hdr *ipv6h; | |
6bd52143 | 2001 | struct mif_device *vif = &mrt->vif6_table[vifi]; |
7bc570c8 YH |
2002 | struct net_device *dev; |
2003 | struct dst_entry *dst; | |
4c9483b2 | 2004 | struct flowi6 fl6; |
7bc570c8 YH |
2005 | |
2006 | if (vif->dev == NULL) | |
2007 | goto out_free; | |
2008 | ||
14fb64e1 YH |
2009 | #ifdef CONFIG_IPV6_PIMSM_V2 |
2010 | if (vif->flags & MIFF_REGISTER) { | |
2011 | vif->pkt_out++; | |
2012 | vif->bytes_out += skb->len; | |
dc58c78c PE |
2013 | vif->dev->stats.tx_bytes += skb->len; |
2014 | vif->dev->stats.tx_packets++; | |
6bd52143 | 2015 | ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); |
8da73b73 | 2016 | goto out_free; |
14fb64e1 YH |
2017 | } |
2018 | #endif | |
2019 | ||
7bc570c8 YH |
2020 | ipv6h = ipv6_hdr(skb); |
2021 | ||
4c9483b2 DM |
2022 | fl6 = (struct flowi6) { |
2023 | .flowi6_oif = vif->link, | |
2024 | .daddr = ipv6h->daddr, | |
7bc570c8 YH |
2025 | }; |
2026 | ||
4c9483b2 | 2027 | dst = ip6_route_output(net, NULL, &fl6); |
5095d64d RL |
2028 | if (dst->error) { |
2029 | dst_release(dst); | |
7bc570c8 | 2030 | goto out_free; |
5095d64d | 2031 | } |
7bc570c8 | 2032 | |
adf30907 ED |
2033 | skb_dst_drop(skb); |
2034 | skb_dst_set(skb, dst); | |
7bc570c8 YH |
2035 | |
2036 | /* | |
2037 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally | |
2038 | * not only before forwarding, but after forwarding on all output | |
2039 | * interfaces. It is clear, if mrouter runs a multicasting | |
2040 | * program, it should receive packets not depending to what interface | |
2041 | * program is joined. | |
2042 | * If we will not make it, the program will have to join on all | |
2043 | * interfaces. On the other hand, multihoming host (or router, but | |
2044 | * not mrouter) cannot join to more than one interface - it will | |
2045 | * result in receiving multiple packets. | |
2046 | */ | |
2047 | dev = vif->dev; | |
2048 | skb->dev = dev; | |
2049 | vif->pkt_out++; | |
2050 | vif->bytes_out += skb->len; | |
2051 | ||
2052 | /* We are about to write */ | |
2053 | /* XXX: extension headers? */ | |
2054 | if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) | |
2055 | goto out_free; | |
2056 | ||
2057 | ipv6h = ipv6_hdr(skb); | |
2058 | ipv6h->hop_limit--; | |
2059 | ||
2060 | IP6CB(skb)->flags |= IP6SKB_FORWARDED; | |
2061 | ||
b2e0b385 | 2062 | return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, skb, skb->dev, dev, |
7bc570c8 YH |
2063 | ip6mr_forward2_finish); |
2064 | ||
2065 | out_free: | |
2066 | kfree_skb(skb); | |
2067 | return 0; | |
2068 | } | |
2069 | ||
6bd52143 | 2070 | static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) |
7bc570c8 YH |
2071 | { |
2072 | int ct; | |
6bd52143 PM |
2073 | |
2074 | for (ct = mrt->maxvif - 1; ct >= 0; ct--) { | |
2075 | if (mrt->vif6_table[ct].dev == dev) | |
7bc570c8 YH |
2076 | break; |
2077 | } | |
2078 | return ct; | |
2079 | } | |
2080 | ||
6bd52143 PM |
2081 | static int ip6_mr_forward(struct net *net, struct mr6_table *mrt, |
2082 | struct sk_buff *skb, struct mfc6_cache *cache) | |
7bc570c8 YH |
2083 | { |
2084 | int psend = -1; | |
2085 | int vif, ct; | |
660b26dc | 2086 | int true_vifi = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 YH |
2087 | |
2088 | vif = cache->mf6c_parent; | |
2089 | cache->mfc_un.res.pkt++; | |
2090 | cache->mfc_un.res.bytes += skb->len; | |
2091 | ||
660b26dc ND |
2092 | if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { |
2093 | struct mfc6_cache *cache_proxy; | |
2094 | ||
2095 | /* For an (*,G) entry, we only check that the incomming | |
2096 | * interface is part of the static tree. | |
2097 | */ | |
2098 | cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); | |
2099 | if (cache_proxy && | |
2100 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2101 | goto forward; | |
2102 | } | |
2103 | ||
14fb64e1 YH |
2104 | /* |
2105 | * Wrong interface: drop packet and (maybe) send PIM assert. | |
2106 | */ | |
6bd52143 | 2107 | if (mrt->vif6_table[vif].dev != skb->dev) { |
14fb64e1 | 2108 | cache->mfc_un.res.wrong_if++; |
14fb64e1 | 2109 | |
6bd52143 | 2110 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
14fb64e1 YH |
2111 | /* pimsm uses asserts, when switching from RPT to SPT, |
2112 | so that we cannot check that packet arrived on an oif. | |
2113 | It is bad, but otherwise we would need to move pretty | |
2114 | large chunk of pimd to kernel. Ough... --ANK | |
2115 | */ | |
6bd52143 | 2116 | (mrt->mroute_do_pim || |
a21f3f99 | 2117 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
14fb64e1 YH |
2118 | time_after(jiffies, |
2119 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { | |
2120 | cache->mfc_un.res.last_assert = jiffies; | |
6bd52143 | 2121 | ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); |
14fb64e1 YH |
2122 | } |
2123 | goto dont_forward; | |
2124 | } | |
2125 | ||
660b26dc | 2126 | forward: |
6bd52143 PM |
2127 | mrt->vif6_table[vif].pkt_in++; |
2128 | mrt->vif6_table[vif].bytes_in += skb->len; | |
7bc570c8 YH |
2129 | |
2130 | /* | |
2131 | * Forward the frame | |
2132 | */ | |
660b26dc ND |
2133 | if (ipv6_addr_any(&cache->mf6c_origin) && |
2134 | ipv6_addr_any(&cache->mf6c_mcastgrp)) { | |
2135 | if (true_vifi >= 0 && | |
2136 | true_vifi != cache->mf6c_parent && | |
2137 | ipv6_hdr(skb)->hop_limit > | |
2138 | cache->mfc_un.res.ttls[cache->mf6c_parent]) { | |
2139 | /* It's an (*,*) entry and the packet is not coming from | |
2140 | * the upstream: forward the packet to the upstream | |
2141 | * only. | |
2142 | */ | |
2143 | psend = cache->mf6c_parent; | |
2144 | goto last_forward; | |
2145 | } | |
2146 | goto dont_forward; | |
2147 | } | |
7bc570c8 | 2148 | for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { |
660b26dc ND |
2149 | /* For (*,G) entry, don't forward to the incoming interface */ |
2150 | if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && | |
2151 | ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { | |
7bc570c8 YH |
2152 | if (psend != -1) { |
2153 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2154 | if (skb2) | |
6bd52143 | 2155 | ip6mr_forward2(net, mrt, skb2, cache, psend); |
7bc570c8 YH |
2156 | } |
2157 | psend = ct; | |
2158 | } | |
2159 | } | |
660b26dc | 2160 | last_forward: |
7bc570c8 | 2161 | if (psend != -1) { |
6bd52143 | 2162 | ip6mr_forward2(net, mrt, skb, cache, psend); |
7bc570c8 YH |
2163 | return 0; |
2164 | } | |
2165 | ||
14fb64e1 | 2166 | dont_forward: |
7bc570c8 YH |
2167 | kfree_skb(skb); |
2168 | return 0; | |
2169 | } | |
2170 | ||
2171 | ||
2172 | /* | |
2173 | * Multicast packets for forwarding arrive here | |
2174 | */ | |
2175 | ||
2176 | int ip6_mr_input(struct sk_buff *skb) | |
2177 | { | |
2178 | struct mfc6_cache *cache; | |
8229efda | 2179 | struct net *net = dev_net(skb->dev); |
d1db275d | 2180 | struct mr6_table *mrt; |
4c9483b2 DM |
2181 | struct flowi6 fl6 = { |
2182 | .flowi6_iif = skb->dev->ifindex, | |
2183 | .flowi6_mark = skb->mark, | |
d1db275d PM |
2184 | }; |
2185 | int err; | |
2186 | ||
4c9483b2 | 2187 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
2015de5f BG |
2188 | if (err < 0) { |
2189 | kfree_skb(skb); | |
d1db275d | 2190 | return err; |
2015de5f | 2191 | } |
7bc570c8 YH |
2192 | |
2193 | read_lock(&mrt_lock); | |
6bd52143 | 2194 | cache = ip6mr_cache_find(mrt, |
8229efda | 2195 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
660b26dc ND |
2196 | if (cache == NULL) { |
2197 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2198 | ||
2199 | if (vif >= 0) | |
2200 | cache = ip6mr_cache_find_any(mrt, | |
2201 | &ipv6_hdr(skb)->daddr, | |
2202 | vif); | |
2203 | } | |
7bc570c8 YH |
2204 | |
2205 | /* | |
2206 | * No usable cache entry | |
2207 | */ | |
2208 | if (cache == NULL) { | |
2209 | int vif; | |
2210 | ||
6bd52143 | 2211 | vif = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 | 2212 | if (vif >= 0) { |
6bd52143 | 2213 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
7bc570c8 YH |
2214 | read_unlock(&mrt_lock); |
2215 | ||
2216 | return err; | |
2217 | } | |
2218 | read_unlock(&mrt_lock); | |
2219 | kfree_skb(skb); | |
2220 | return -ENODEV; | |
2221 | } | |
2222 | ||
6bd52143 | 2223 | ip6_mr_forward(net, mrt, skb, cache); |
7bc570c8 YH |
2224 | |
2225 | read_unlock(&mrt_lock); | |
2226 | ||
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | ||
5b285cac PM |
2231 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
2232 | struct mfc6_cache *c, struct rtmsg *rtm) | |
7bc570c8 YH |
2233 | { |
2234 | int ct; | |
2235 | struct rtnexthop *nhp; | |
70b386a0 | 2236 | struct nlattr *mp_attr; |
adfa85e4 | 2237 | struct rta_mfc_stats mfcs; |
7bc570c8 | 2238 | |
7438189b | 2239 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
ed0f160a | 2240 | if (c->mf6c_parent >= MAXMIFS) |
7438189b ND |
2241 | return -ENOENT; |
2242 | ||
74a0bd7d TG |
2243 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
2244 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) | |
2245 | return -EMSGSIZE; | |
70b386a0 ND |
2246 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
2247 | if (mp_attr == NULL) | |
2248 | return -EMSGSIZE; | |
7bc570c8 YH |
2249 | |
2250 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
6bd52143 | 2251 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
70b386a0 ND |
2252 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
2253 | if (nhp == NULL) { | |
2254 | nla_nest_cancel(skb, mp_attr); | |
2255 | return -EMSGSIZE; | |
2256 | } | |
2257 | ||
7bc570c8 YH |
2258 | nhp->rtnh_flags = 0; |
2259 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
6bd52143 | 2260 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
7bc570c8 YH |
2261 | nhp->rtnh_len = sizeof(*nhp); |
2262 | } | |
2263 | } | |
70b386a0 ND |
2264 | |
2265 | nla_nest_end(skb, mp_attr); | |
2266 | ||
adfa85e4 ND |
2267 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2268 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2269 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
2270 | if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0) | |
2271 | return -EMSGSIZE; | |
2272 | ||
7bc570c8 YH |
2273 | rtm->rtm_type = RTN_MULTICAST; |
2274 | return 1; | |
7bc570c8 YH |
2275 | } |
2276 | ||
2943dca4 NA |
2277 | int ip6mr_get_route(struct net *net, struct sk_buff *skb, struct rtmsg *rtm, |
2278 | int nowait, u32 portid) | |
7bc570c8 YH |
2279 | { |
2280 | int err; | |
d1db275d | 2281 | struct mr6_table *mrt; |
7bc570c8 | 2282 | struct mfc6_cache *cache; |
adf30907 | 2283 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
7bc570c8 | 2284 | |
d1db275d PM |
2285 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
2286 | if (mrt == NULL) | |
2287 | return -ENOENT; | |
2288 | ||
7bc570c8 | 2289 | read_lock(&mrt_lock); |
6bd52143 | 2290 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
660b26dc ND |
2291 | if (!cache && skb->dev) { |
2292 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2293 | ||
2294 | if (vif >= 0) | |
2295 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, | |
2296 | vif); | |
2297 | } | |
7bc570c8 YH |
2298 | |
2299 | if (!cache) { | |
2300 | struct sk_buff *skb2; | |
2301 | struct ipv6hdr *iph; | |
2302 | struct net_device *dev; | |
2303 | int vif; | |
2304 | ||
2305 | if (nowait) { | |
2306 | read_unlock(&mrt_lock); | |
2307 | return -EAGAIN; | |
2308 | } | |
2309 | ||
2310 | dev = skb->dev; | |
6bd52143 | 2311 | if (dev == NULL || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
7bc570c8 YH |
2312 | read_unlock(&mrt_lock); |
2313 | return -ENODEV; | |
2314 | } | |
2315 | ||
2316 | /* really correct? */ | |
2317 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
2318 | if (!skb2) { | |
2319 | read_unlock(&mrt_lock); | |
2320 | return -ENOMEM; | |
2321 | } | |
2322 | ||
2943dca4 | 2323 | NETLINK_CB(skb2).portid = portid; |
7bc570c8 YH |
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, |
29466c9f 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 | |
29466c9f | 2363 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
5b285cac PM |
2364 | if (nlh == NULL) |
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 | ||
c78679e8 DM |
2383 | if (nla_put(skb, RTA_SRC, 16, &c->mf6c_origin) || |
2384 | nla_put(skb, RTA_DST, 16, &c->mf6c_mcastgrp)) | |
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 | ||
2391 | return nlmsg_end(skb, nlh); | |
2392 | ||
2393 | nla_put_failure: | |
2394 | nlmsg_cancel(skb, nlh); | |
2395 | return -EMSGSIZE; | |
2396 | } | |
2397 | ||
812e44dd ND |
2398 | static int mr6_msgsize(bool unresolved, int maxvif) |
2399 | { | |
2400 | size_t len = | |
2401 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2402 | + nla_total_size(4) /* RTA_TABLE */ | |
2403 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ | |
2404 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ | |
2405 | ; | |
2406 | ||
2407 | if (!unresolved) | |
2408 | len = len | |
2409 | + nla_total_size(4) /* RTA_IIF */ | |
2410 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2411 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2412 | /* RTA_MFC_STATS */ | |
2413 | + nla_total_size(sizeof(struct rta_mfc_stats)) | |
2414 | ; | |
2415 | ||
2416 | return len; | |
2417 | } | |
2418 | ||
2419 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, | |
2420 | int cmd) | |
2421 | { | |
2422 | struct net *net = read_pnet(&mrt->net); | |
2423 | struct sk_buff *skb; | |
2424 | int err = -ENOBUFS; | |
2425 | ||
2426 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), | |
2427 | GFP_ATOMIC); | |
2428 | if (skb == NULL) | |
2429 | goto errout; | |
2430 | ||
29466c9f | 2431 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
812e44dd ND |
2432 | if (err < 0) |
2433 | goto errout; | |
2434 | ||
2435 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); | |
2436 | return; | |
2437 | ||
2438 | errout: | |
2439 | kfree_skb(skb); | |
2440 | if (err < 0) | |
2441 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); | |
2442 | } | |
2443 | ||
5b285cac PM |
2444 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2445 | { | |
2446 | struct net *net = sock_net(skb->sk); | |
2447 | struct mr6_table *mrt; | |
2448 | struct mfc6_cache *mfc; | |
2449 | unsigned int t = 0, s_t; | |
2450 | unsigned int h = 0, s_h; | |
2451 | unsigned int e = 0, s_e; | |
2452 | ||
2453 | s_t = cb->args[0]; | |
2454 | s_h = cb->args[1]; | |
2455 | s_e = cb->args[2]; | |
2456 | ||
2457 | read_lock(&mrt_lock); | |
2458 | ip6mr_for_each_table(mrt, net) { | |
2459 | if (t < s_t) | |
2460 | goto next_table; | |
2461 | if (t > s_t) | |
2462 | s_h = 0; | |
2463 | for (h = s_h; h < MFC6_LINES; h++) { | |
2464 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { | |
2465 | if (e < s_e) | |
2466 | goto next_entry; | |
2467 | if (ip6mr_fill_mroute(mrt, skb, | |
15e47304 | 2468 | NETLINK_CB(cb->skb).portid, |
5b285cac | 2469 | cb->nlh->nlmsg_seq, |
29466c9f ND |
2470 | mfc, RTM_NEWROUTE, |
2471 | NLM_F_MULTI) < 0) | |
5b285cac PM |
2472 | goto done; |
2473 | next_entry: | |
2474 | e++; | |
2475 | } | |
2476 | e = s_e = 0; | |
2477 | } | |
1eb99af5 ND |
2478 | spin_lock_bh(&mfc_unres_lock); |
2479 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { | |
2480 | if (e < s_e) | |
2481 | goto next_entry2; | |
2482 | if (ip6mr_fill_mroute(mrt, skb, | |
2483 | NETLINK_CB(cb->skb).portid, | |
2484 | cb->nlh->nlmsg_seq, | |
29466c9f ND |
2485 | mfc, RTM_NEWROUTE, |
2486 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2487 | spin_unlock_bh(&mfc_unres_lock); |
2488 | goto done; | |
2489 | } | |
2490 | next_entry2: | |
2491 | e++; | |
2492 | } | |
2493 | spin_unlock_bh(&mfc_unres_lock); | |
2494 | e = s_e = 0; | |
5b285cac PM |
2495 | s_h = 0; |
2496 | next_table: | |
2497 | t++; | |
2498 | } | |
2499 | done: | |
2500 | read_unlock(&mrt_lock); | |
2501 | ||
2502 | cb->args[2] = e; | |
2503 | cb->args[1] = h; | |
2504 | cb->args[0] = t; | |
2505 | ||
2506 | return skb->len; | |
2507 | } |