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; |
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); | |
6bd52143 | 121 | static void mroute_clean_tables(struct mr6_table *mrt); |
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, | |
220 | .default_pref = fib_default_rule_pref, | |
221 | .fill = ip6mr_rule_fill, | |
222 | .nlgroup = RTNLGRP_IPV6_RULE, | |
223 | .policy = ip6mr_rule_policy, | |
224 | .owner = THIS_MODULE, | |
225 | }; | |
226 | ||
227 | static int __net_init ip6mr_rules_init(struct net *net) | |
228 | { | |
229 | struct fib_rules_ops *ops; | |
230 | struct mr6_table *mrt; | |
231 | int err; | |
232 | ||
233 | ops = fib_rules_register(&ip6mr_rules_ops_template, net); | |
234 | if (IS_ERR(ops)) | |
235 | return PTR_ERR(ops); | |
236 | ||
237 | INIT_LIST_HEAD(&net->ipv6.mr6_tables); | |
238 | ||
239 | mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
63159f29 | 240 | if (!mrt) { |
d1db275d PM |
241 | err = -ENOMEM; |
242 | goto err1; | |
243 | } | |
244 | ||
245 | err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); | |
246 | if (err < 0) | |
247 | goto err2; | |
248 | ||
249 | net->ipv6.mr6_rules_ops = ops; | |
250 | return 0; | |
251 | ||
252 | err2: | |
253 | kfree(mrt); | |
254 | err1: | |
255 | fib_rules_unregister(ops); | |
256 | return err; | |
257 | } | |
258 | ||
259 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
260 | { | |
261 | struct mr6_table *mrt, *next; | |
262 | ||
905a6f96 | 263 | rtnl_lock(); |
035320d5 ED |
264 | list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { |
265 | list_del(&mrt->list); | |
d1db275d | 266 | ip6mr_free_table(mrt); |
035320d5 | 267 | } |
905a6f96 | 268 | rtnl_unlock(); |
d1db275d PM |
269 | fib_rules_unregister(net->ipv6.mr6_rules_ops); |
270 | } | |
271 | #else | |
272 | #define ip6mr_for_each_table(mrt, net) \ | |
273 | for (mrt = net->ipv6.mrt6; mrt; mrt = NULL) | |
274 | ||
275 | static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) | |
276 | { | |
277 | return net->ipv6.mrt6; | |
278 | } | |
279 | ||
4c9483b2 | 280 | static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, |
d1db275d PM |
281 | struct mr6_table **mrt) |
282 | { | |
283 | *mrt = net->ipv6.mrt6; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int __net_init ip6mr_rules_init(struct net *net) | |
288 | { | |
289 | net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); | |
290 | return net->ipv6.mrt6 ? 0 : -ENOMEM; | |
291 | } | |
292 | ||
293 | static void __net_exit ip6mr_rules_exit(struct net *net) | |
294 | { | |
905a6f96 | 295 | rtnl_lock(); |
d1db275d | 296 | ip6mr_free_table(net->ipv6.mrt6); |
905a6f96 HFS |
297 | net->ipv6.mrt6 = NULL; |
298 | rtnl_unlock(); | |
d1db275d PM |
299 | } |
300 | #endif | |
301 | ||
302 | static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) | |
303 | { | |
304 | struct mr6_table *mrt; | |
305 | unsigned int i; | |
306 | ||
307 | mrt = ip6mr_get_table(net, id); | |
53b24b8f | 308 | if (mrt) |
d1db275d PM |
309 | return mrt; |
310 | ||
311 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
63159f29 | 312 | if (!mrt) |
d1db275d PM |
313 | return NULL; |
314 | mrt->id = id; | |
315 | write_pnet(&mrt->net, net); | |
316 | ||
317 | /* Forwarding cache */ | |
318 | for (i = 0; i < MFC6_LINES; i++) | |
319 | INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); | |
320 | ||
321 | INIT_LIST_HEAD(&mrt->mfc6_unres_queue); | |
322 | ||
323 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, | |
324 | (unsigned long)mrt); | |
325 | ||
326 | #ifdef CONFIG_IPV6_PIMSM_V2 | |
327 | mrt->mroute_reg_vif_num = -1; | |
328 | #endif | |
329 | #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES | |
330 | list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); | |
331 | #endif | |
332 | return mrt; | |
333 | } | |
7bc570c8 | 334 | |
d1db275d PM |
335 | static void ip6mr_free_table(struct mr6_table *mrt) |
336 | { | |
337 | del_timer(&mrt->ipmr_expire_timer); | |
338 | mroute_clean_tables(mrt); | |
339 | kfree(mrt); | |
340 | } | |
7bc570c8 YH |
341 | |
342 | #ifdef CONFIG_PROC_FS | |
343 | ||
344 | struct ipmr_mfc_iter { | |
8b90fc7e | 345 | struct seq_net_private p; |
d1db275d | 346 | struct mr6_table *mrt; |
f30a7784 | 347 | struct list_head *cache; |
7bc570c8 YH |
348 | int ct; |
349 | }; | |
350 | ||
351 | ||
8b90fc7e BT |
352 | static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, |
353 | struct ipmr_mfc_iter *it, loff_t pos) | |
7bc570c8 | 354 | { |
d1db275d | 355 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
356 | struct mfc6_cache *mfc; |
357 | ||
7bc570c8 | 358 | read_lock(&mrt_lock); |
f30a7784 | 359 | for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { |
6bd52143 | 360 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 | 361 | list_for_each_entry(mfc, it->cache, list) |
7bc570c8 YH |
362 | if (pos-- == 0) |
363 | return mfc; | |
f30a7784 | 364 | } |
7bc570c8 YH |
365 | read_unlock(&mrt_lock); |
366 | ||
7bc570c8 | 367 | spin_lock_bh(&mfc_unres_lock); |
6bd52143 | 368 | it->cache = &mrt->mfc6_unres_queue; |
f30a7784 | 369 | list_for_each_entry(mfc, it->cache, list) |
c476efbc | 370 | if (pos-- == 0) |
7bc570c8 YH |
371 | return mfc; |
372 | spin_unlock_bh(&mfc_unres_lock); | |
373 | ||
374 | it->cache = NULL; | |
375 | return NULL; | |
376 | } | |
377 | ||
7bc570c8 YH |
378 | /* |
379 | * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif | |
380 | */ | |
381 | ||
382 | struct ipmr_vif_iter { | |
8b90fc7e | 383 | struct seq_net_private p; |
d1db275d | 384 | struct mr6_table *mrt; |
7bc570c8 YH |
385 | int ct; |
386 | }; | |
387 | ||
8b90fc7e BT |
388 | static struct mif_device *ip6mr_vif_seq_idx(struct net *net, |
389 | struct ipmr_vif_iter *iter, | |
7bc570c8 YH |
390 | loff_t pos) |
391 | { | |
d1db275d | 392 | struct mr6_table *mrt = iter->mrt; |
6bd52143 PM |
393 | |
394 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
395 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 YH |
396 | continue; |
397 | if (pos-- == 0) | |
6bd52143 | 398 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
399 | } |
400 | return NULL; | |
401 | } | |
402 | ||
403 | static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
404 | __acquires(mrt_lock) | |
405 | { | |
d1db275d | 406 | struct ipmr_vif_iter *iter = seq->private; |
8b90fc7e | 407 | struct net *net = seq_file_net(seq); |
d1db275d PM |
408 | struct mr6_table *mrt; |
409 | ||
410 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); | |
63159f29 | 411 | if (!mrt) |
d1db275d PM |
412 | return ERR_PTR(-ENOENT); |
413 | ||
414 | iter->mrt = mrt; | |
8b90fc7e | 415 | |
7bc570c8 | 416 | read_lock(&mrt_lock); |
8b90fc7e BT |
417 | return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) |
418 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
419 | } |
420 | ||
421 | static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
422 | { | |
423 | struct ipmr_vif_iter *iter = seq->private; | |
8b90fc7e | 424 | struct net *net = seq_file_net(seq); |
d1db275d | 425 | struct mr6_table *mrt = iter->mrt; |
7bc570c8 YH |
426 | |
427 | ++*pos; | |
428 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 429 | return ip6mr_vif_seq_idx(net, iter, 0); |
7bc570c8 | 430 | |
6bd52143 PM |
431 | while (++iter->ct < mrt->maxvif) { |
432 | if (!MIF_EXISTS(mrt, iter->ct)) | |
7bc570c8 | 433 | continue; |
6bd52143 | 434 | return &mrt->vif6_table[iter->ct]; |
7bc570c8 YH |
435 | } |
436 | return NULL; | |
437 | } | |
438 | ||
439 | static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) | |
440 | __releases(mrt_lock) | |
441 | { | |
442 | read_unlock(&mrt_lock); | |
443 | } | |
444 | ||
445 | static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) | |
446 | { | |
d1db275d PM |
447 | struct ipmr_vif_iter *iter = seq->private; |
448 | struct mr6_table *mrt = iter->mrt; | |
8b90fc7e | 449 | |
7bc570c8 YH |
450 | if (v == SEQ_START_TOKEN) { |
451 | seq_puts(seq, | |
452 | "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); | |
453 | } else { | |
454 | const struct mif_device *vif = v; | |
455 | const char *name = vif->dev ? vif->dev->name : "none"; | |
456 | ||
457 | seq_printf(seq, | |
d430a227 | 458 | "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", |
6bd52143 | 459 | vif - mrt->vif6_table, |
7bc570c8 YH |
460 | name, vif->bytes_in, vif->pkt_in, |
461 | vif->bytes_out, vif->pkt_out, | |
462 | vif->flags); | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
98147d52 | 467 | static const struct seq_operations ip6mr_vif_seq_ops = { |
7bc570c8 YH |
468 | .start = ip6mr_vif_seq_start, |
469 | .next = ip6mr_vif_seq_next, | |
470 | .stop = ip6mr_vif_seq_stop, | |
471 | .show = ip6mr_vif_seq_show, | |
472 | }; | |
473 | ||
474 | static int ip6mr_vif_open(struct inode *inode, struct file *file) | |
475 | { | |
8b90fc7e BT |
476 | return seq_open_net(inode, file, &ip6mr_vif_seq_ops, |
477 | sizeof(struct ipmr_vif_iter)); | |
7bc570c8 YH |
478 | } |
479 | ||
5ca1b998 | 480 | static const struct file_operations ip6mr_vif_fops = { |
7bc570c8 YH |
481 | .owner = THIS_MODULE, |
482 | .open = ip6mr_vif_open, | |
483 | .read = seq_read, | |
484 | .llseek = seq_lseek, | |
8b90fc7e | 485 | .release = seq_release_net, |
7bc570c8 YH |
486 | }; |
487 | ||
488 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
489 | { | |
d1db275d | 490 | struct ipmr_mfc_iter *it = seq->private; |
8b90fc7e | 491 | struct net *net = seq_file_net(seq); |
d1db275d | 492 | struct mr6_table *mrt; |
8b90fc7e | 493 | |
d1db275d | 494 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 495 | if (!mrt) |
d1db275d PM |
496 | return ERR_PTR(-ENOENT); |
497 | ||
498 | it->mrt = mrt; | |
8b90fc7e BT |
499 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
500 | : SEQ_START_TOKEN; | |
7bc570c8 YH |
501 | } |
502 | ||
503 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
504 | { | |
505 | struct mfc6_cache *mfc = v; | |
506 | struct ipmr_mfc_iter *it = seq->private; | |
8b90fc7e | 507 | struct net *net = seq_file_net(seq); |
d1db275d | 508 | struct mr6_table *mrt = it->mrt; |
7bc570c8 YH |
509 | |
510 | ++*pos; | |
511 | ||
512 | if (v == SEQ_START_TOKEN) | |
8b90fc7e | 513 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
7bc570c8 | 514 | |
f30a7784 PM |
515 | if (mfc->list.next != it->cache) |
516 | return list_entry(mfc->list.next, struct mfc6_cache, list); | |
7bc570c8 | 517 | |
6bd52143 | 518 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 YH |
519 | goto end_of_list; |
520 | ||
6bd52143 | 521 | BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); |
7bc570c8 | 522 | |
4a6258a0 | 523 | while (++it->ct < MFC6_LINES) { |
6bd52143 | 524 | it->cache = &mrt->mfc6_cache_array[it->ct]; |
f30a7784 PM |
525 | if (list_empty(it->cache)) |
526 | continue; | |
527 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
528 | } |
529 | ||
530 | /* exhausted cache_array, show unresolved */ | |
531 | read_unlock(&mrt_lock); | |
6bd52143 | 532 | it->cache = &mrt->mfc6_unres_queue; |
7bc570c8 YH |
533 | it->ct = 0; |
534 | ||
535 | spin_lock_bh(&mfc_unres_lock); | |
f30a7784 PM |
536 | if (!list_empty(it->cache)) |
537 | return list_first_entry(it->cache, struct mfc6_cache, list); | |
7bc570c8 YH |
538 | |
539 | end_of_list: | |
540 | spin_unlock_bh(&mfc_unres_lock); | |
541 | it->cache = NULL; | |
542 | ||
543 | return NULL; | |
544 | } | |
545 | ||
546 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
547 | { | |
548 | struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 549 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 550 | |
6bd52143 | 551 | if (it->cache == &mrt->mfc6_unres_queue) |
7bc570c8 | 552 | spin_unlock_bh(&mfc_unres_lock); |
6bd52143 | 553 | else if (it->cache == mrt->mfc6_cache_array) |
7bc570c8 YH |
554 | read_unlock(&mrt_lock); |
555 | } | |
556 | ||
557 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
558 | { | |
559 | int n; | |
560 | ||
561 | if (v == SEQ_START_TOKEN) { | |
562 | seq_puts(seq, | |
563 | "Group " | |
564 | "Origin " | |
565 | "Iif Pkts Bytes Wrong Oifs\n"); | |
566 | } else { | |
567 | const struct mfc6_cache *mfc = v; | |
568 | const struct ipmr_mfc_iter *it = seq->private; | |
d1db275d | 569 | struct mr6_table *mrt = it->mrt; |
7bc570c8 | 570 | |
999890b2 | 571 | seq_printf(seq, "%pI6 %pI6 %-3hd", |
0c6ce78a | 572 | &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, |
1ea472e2 | 573 | mfc->mf6c_parent); |
7bc570c8 | 574 | |
6bd52143 | 575 | if (it->cache != &mrt->mfc6_unres_queue) { |
1ea472e2 BT |
576 | seq_printf(seq, " %8lu %8lu %8lu", |
577 | mfc->mfc_un.res.pkt, | |
578 | mfc->mfc_un.res.bytes, | |
579 | mfc->mfc_un.res.wrong_if); | |
7bc570c8 YH |
580 | for (n = mfc->mfc_un.res.minvif; |
581 | n < mfc->mfc_un.res.maxvif; n++) { | |
6bd52143 | 582 | if (MIF_EXISTS(mrt, n) && |
7bc570c8 YH |
583 | mfc->mfc_un.res.ttls[n] < 255) |
584 | seq_printf(seq, | |
585 | " %2d:%-3d", | |
586 | n, mfc->mfc_un.res.ttls[n]); | |
587 | } | |
1ea472e2 BT |
588 | } else { |
589 | /* unresolved mfc_caches don't contain | |
590 | * pkt, bytes and wrong_if values | |
591 | */ | |
592 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
7bc570c8 YH |
593 | } |
594 | seq_putc(seq, '\n'); | |
595 | } | |
596 | return 0; | |
597 | } | |
598 | ||
88e9d34c | 599 | static const struct seq_operations ipmr_mfc_seq_ops = { |
7bc570c8 YH |
600 | .start = ipmr_mfc_seq_start, |
601 | .next = ipmr_mfc_seq_next, | |
602 | .stop = ipmr_mfc_seq_stop, | |
603 | .show = ipmr_mfc_seq_show, | |
604 | }; | |
605 | ||
606 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
607 | { | |
8b90fc7e BT |
608 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
609 | sizeof(struct ipmr_mfc_iter)); | |
7bc570c8 YH |
610 | } |
611 | ||
5ca1b998 | 612 | static const struct file_operations ip6mr_mfc_fops = { |
7bc570c8 YH |
613 | .owner = THIS_MODULE, |
614 | .open = ipmr_mfc_open, | |
615 | .read = seq_read, | |
616 | .llseek = seq_lseek, | |
8b90fc7e | 617 | .release = seq_release_net, |
7bc570c8 YH |
618 | }; |
619 | #endif | |
620 | ||
14fb64e1 | 621 | #ifdef CONFIG_IPV6_PIMSM_V2 |
14fb64e1 YH |
622 | |
623 | static int pim6_rcv(struct sk_buff *skb) | |
624 | { | |
625 | struct pimreghdr *pim; | |
626 | struct ipv6hdr *encap; | |
627 | struct net_device *reg_dev = NULL; | |
8229efda | 628 | struct net *net = dev_net(skb->dev); |
d1db275d | 629 | struct mr6_table *mrt; |
4c9483b2 DM |
630 | struct flowi6 fl6 = { |
631 | .flowi6_iif = skb->dev->ifindex, | |
632 | .flowi6_mark = skb->mark, | |
d1db275d PM |
633 | }; |
634 | int reg_vif_num; | |
14fb64e1 YH |
635 | |
636 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) | |
637 | goto drop; | |
638 | ||
639 | pim = (struct pimreghdr *)skb_transport_header(skb); | |
640 | if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) || | |
641 | (pim->flags & PIM_NULL_REGISTER) || | |
1d6e55f1 TG |
642 | (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
643 | sizeof(*pim), IPPROTO_PIM, | |
644 | csum_partial((void *)pim, sizeof(*pim), 0)) && | |
ec6b486f | 645 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
14fb64e1 YH |
646 | goto drop; |
647 | ||
648 | /* check if the inner packet is destined to mcast group */ | |
649 | encap = (struct ipv6hdr *)(skb_transport_header(skb) + | |
650 | sizeof(*pim)); | |
651 | ||
652 | if (!ipv6_addr_is_multicast(&encap->daddr) || | |
653 | encap->payload_len == 0 || | |
654 | ntohs(encap->payload_len) + sizeof(*pim) > skb->len) | |
655 | goto drop; | |
656 | ||
4c9483b2 | 657 | if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) |
d1db275d PM |
658 | goto drop; |
659 | reg_vif_num = mrt->mroute_reg_vif_num; | |
660 | ||
14fb64e1 YH |
661 | read_lock(&mrt_lock); |
662 | if (reg_vif_num >= 0) | |
6bd52143 | 663 | reg_dev = mrt->vif6_table[reg_vif_num].dev; |
14fb64e1 YH |
664 | if (reg_dev) |
665 | dev_hold(reg_dev); | |
666 | read_unlock(&mrt_lock); | |
667 | ||
63159f29 | 668 | if (!reg_dev) |
14fb64e1 YH |
669 | goto drop; |
670 | ||
671 | skb->mac_header = skb->network_header; | |
672 | skb_pull(skb, (u8 *)encap - skb->data); | |
673 | skb_reset_network_header(skb); | |
1d6e55f1 | 674 | skb->protocol = htons(ETH_P_IPV6); |
3e49e6d5 | 675 | skb->ip_summed = CHECKSUM_NONE; |
d19d56dd | 676 | |
ea23192e | 677 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); |
d19d56dd | 678 | |
caf586e5 | 679 | netif_rx(skb); |
8990f468 | 680 | |
14fb64e1 YH |
681 | dev_put(reg_dev); |
682 | return 0; | |
683 | drop: | |
684 | kfree_skb(skb); | |
685 | return 0; | |
686 | } | |
687 | ||
41135cc8 | 688 | static const struct inet6_protocol pim6_protocol = { |
14fb64e1 YH |
689 | .handler = pim6_rcv, |
690 | }; | |
691 | ||
692 | /* Service routines creating virtual interfaces: PIMREG */ | |
693 | ||
6fef4c0c SH |
694 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, |
695 | struct net_device *dev) | |
14fb64e1 | 696 | { |
8229efda | 697 | struct net *net = dev_net(dev); |
d1db275d | 698 | struct mr6_table *mrt; |
4c9483b2 DM |
699 | struct flowi6 fl6 = { |
700 | .flowi6_oif = dev->ifindex, | |
6a662719 | 701 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 | 702 | .flowi6_mark = skb->mark, |
d1db275d PM |
703 | }; |
704 | int err; | |
705 | ||
4c9483b2 | 706 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
67928c40 BG |
707 | if (err < 0) { |
708 | kfree_skb(skb); | |
d1db275d | 709 | return err; |
67928c40 | 710 | } |
8229efda | 711 | |
14fb64e1 | 712 | read_lock(&mrt_lock); |
dc58c78c PE |
713 | dev->stats.tx_bytes += skb->len; |
714 | dev->stats.tx_packets++; | |
6bd52143 | 715 | ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); |
14fb64e1 YH |
716 | read_unlock(&mrt_lock); |
717 | kfree_skb(skb); | |
6ed10654 | 718 | return NETDEV_TX_OK; |
14fb64e1 YH |
719 | } |
720 | ||
007c3838 SH |
721 | static const struct net_device_ops reg_vif_netdev_ops = { |
722 | .ndo_start_xmit = reg_vif_xmit, | |
723 | }; | |
724 | ||
14fb64e1 YH |
725 | static void reg_vif_setup(struct net_device *dev) |
726 | { | |
727 | dev->type = ARPHRD_PIMREG; | |
728 | dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; | |
729 | dev->flags = IFF_NOARP; | |
007c3838 | 730 | dev->netdev_ops = ®_vif_netdev_ops; |
14fb64e1 | 731 | dev->destructor = free_netdev; |
403dbb97 | 732 | dev->features |= NETIF_F_NETNS_LOCAL; |
14fb64e1 YH |
733 | } |
734 | ||
d1db275d | 735 | static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) |
14fb64e1 YH |
736 | { |
737 | struct net_device *dev; | |
d1db275d PM |
738 | char name[IFNAMSIZ]; |
739 | ||
740 | if (mrt->id == RT6_TABLE_DFLT) | |
741 | sprintf(name, "pim6reg"); | |
742 | else | |
743 | sprintf(name, "pim6reg%u", mrt->id); | |
14fb64e1 | 744 | |
c835a677 | 745 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
63159f29 | 746 | if (!dev) |
14fb64e1 YH |
747 | return NULL; |
748 | ||
8229efda BT |
749 | dev_net_set(dev, net); |
750 | ||
14fb64e1 YH |
751 | if (register_netdevice(dev)) { |
752 | free_netdev(dev); | |
753 | return NULL; | |
754 | } | |
755 | dev->iflink = 0; | |
756 | ||
14fb64e1 YH |
757 | if (dev_open(dev)) |
758 | goto failure; | |
759 | ||
7af3db78 | 760 | dev_hold(dev); |
14fb64e1 YH |
761 | return dev; |
762 | ||
763 | failure: | |
764 | /* allow the register to be completed before unregistering. */ | |
765 | rtnl_unlock(); | |
766 | rtnl_lock(); | |
767 | ||
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 | ||
6bd52143 | 1541 | static void mroute_clean_tables(struct mr6_table *mrt) |
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 PM |
1550 | for (i = 0; i < mrt->maxvif; i++) { |
1551 | if (!(mrt->vif6_table[i].flags & VIFF_STATIC)) | |
1552 | mif6_delete(mrt, i, &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) { |
f30a7784 | 1561 | if (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 | |
d1db275d PM |
1624 | mroute_clean_tables(mrt); |
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 | 1637 | struct flowi6 fl6 = { |
e374c618 | 1638 | .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
4c9483b2 DM |
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); | |
63159f29 | 1666 | if (!mrt) |
d1db275d | 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(); | |
6bd52143 | 1705 | ret = mif6_delete(mrt, mifi, 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); | |
63159f29 | 1815 | if (!mrt) |
d1db275d | 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); | |
63159f29 | 1862 | if (!mrt) |
d1db275d | 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); | |
63159f29 | 1936 | if (!mrt) |
e2d57766 DM |
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 | 2005 | |
63159f29 | 2006 | if (!vif->dev) |
7bc570c8 YH |
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 | ||
2b52c3ad RR |
2081 | static void 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 | ||
40dc2ca3 | 2095 | /* For an (*,G) entry, we only check that the incoming |
660b26dc ND |
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); |
2b52c3ad | 2163 | return; |
7bc570c8 YH |
2164 | } |
2165 | ||
14fb64e1 | 2166 | dont_forward: |
7bc570c8 | 2167 | kfree_skb(skb); |
7bc570c8 YH |
2168 | } |
2169 | ||
2170 | ||
2171 | /* | |
2172 | * Multicast packets for forwarding arrive here | |
2173 | */ | |
2174 | ||
2175 | int ip6_mr_input(struct sk_buff *skb) | |
2176 | { | |
2177 | struct mfc6_cache *cache; | |
8229efda | 2178 | struct net *net = dev_net(skb->dev); |
d1db275d | 2179 | struct mr6_table *mrt; |
4c9483b2 DM |
2180 | struct flowi6 fl6 = { |
2181 | .flowi6_iif = skb->dev->ifindex, | |
2182 | .flowi6_mark = skb->mark, | |
d1db275d PM |
2183 | }; |
2184 | int err; | |
2185 | ||
4c9483b2 | 2186 | err = ip6mr_fib_lookup(net, &fl6, &mrt); |
2015de5f BG |
2187 | if (err < 0) { |
2188 | kfree_skb(skb); | |
d1db275d | 2189 | return err; |
2015de5f | 2190 | } |
7bc570c8 YH |
2191 | |
2192 | read_lock(&mrt_lock); | |
6bd52143 | 2193 | cache = ip6mr_cache_find(mrt, |
8229efda | 2194 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); |
63159f29 | 2195 | if (!cache) { |
660b26dc ND |
2196 | int vif = ip6mr_find_vif(mrt, skb->dev); |
2197 | ||
2198 | if (vif >= 0) | |
2199 | cache = ip6mr_cache_find_any(mrt, | |
2200 | &ipv6_hdr(skb)->daddr, | |
2201 | vif); | |
2202 | } | |
7bc570c8 YH |
2203 | |
2204 | /* | |
2205 | * No usable cache entry | |
2206 | */ | |
63159f29 | 2207 | if (!cache) { |
7bc570c8 YH |
2208 | int vif; |
2209 | ||
6bd52143 | 2210 | vif = ip6mr_find_vif(mrt, skb->dev); |
7bc570c8 | 2211 | if (vif >= 0) { |
6bd52143 | 2212 | int err = ip6mr_cache_unresolved(mrt, vif, skb); |
7bc570c8 YH |
2213 | read_unlock(&mrt_lock); |
2214 | ||
2215 | return err; | |
2216 | } | |
2217 | read_unlock(&mrt_lock); | |
2218 | kfree_skb(skb); | |
2219 | return -ENODEV; | |
2220 | } | |
2221 | ||
6bd52143 | 2222 | ip6_mr_forward(net, mrt, skb, cache); |
7bc570c8 YH |
2223 | |
2224 | read_unlock(&mrt_lock); | |
2225 | ||
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | ||
5b285cac PM |
2230 | static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
2231 | struct mfc6_cache *c, struct rtmsg *rtm) | |
7bc570c8 YH |
2232 | { |
2233 | int ct; | |
2234 | struct rtnexthop *nhp; | |
70b386a0 | 2235 | struct nlattr *mp_attr; |
adfa85e4 | 2236 | struct rta_mfc_stats mfcs; |
7bc570c8 | 2237 | |
7438189b | 2238 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
ed0f160a | 2239 | if (c->mf6c_parent >= MAXMIFS) |
7438189b ND |
2240 | return -ENOENT; |
2241 | ||
74a0bd7d TG |
2242 | if (MIF_EXISTS(mrt, c->mf6c_parent) && |
2243 | nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) | |
2244 | return -EMSGSIZE; | |
70b386a0 | 2245 | mp_attr = nla_nest_start(skb, RTA_MULTIPATH); |
63159f29 | 2246 | if (!mp_attr) |
70b386a0 | 2247 | return -EMSGSIZE; |
7bc570c8 YH |
2248 | |
2249 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
6bd52143 | 2250 | if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
70b386a0 | 2251 | nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); |
63159f29 | 2252 | if (!nhp) { |
70b386a0 ND |
2253 | nla_nest_cancel(skb, mp_attr); |
2254 | return -EMSGSIZE; | |
2255 | } | |
2256 | ||
7bc570c8 YH |
2257 | nhp->rtnh_flags = 0; |
2258 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
6bd52143 | 2259 | nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; |
7bc570c8 YH |
2260 | nhp->rtnh_len = sizeof(*nhp); |
2261 | } | |
2262 | } | |
70b386a0 ND |
2263 | |
2264 | nla_nest_end(skb, mp_attr); | |
2265 | ||
adfa85e4 ND |
2266 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2267 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2268 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
2269 | if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0) | |
2270 | return -EMSGSIZE; | |
2271 | ||
7bc570c8 YH |
2272 | rtm->rtm_type = RTN_MULTICAST; |
2273 | return 1; | |
7bc570c8 YH |
2274 | } |
2275 | ||
8229efda BT |
2276 | int ip6mr_get_route(struct net *net, |
2277 | struct sk_buff *skb, struct rtmsg *rtm, int nowait) | |
7bc570c8 YH |
2278 | { |
2279 | int err; | |
d1db275d | 2280 | struct mr6_table *mrt; |
7bc570c8 | 2281 | struct mfc6_cache *cache; |
adf30907 | 2282 | struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); |
7bc570c8 | 2283 | |
d1db275d | 2284 | mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); |
63159f29 | 2285 | if (!mrt) |
d1db275d PM |
2286 | return -ENOENT; |
2287 | ||
7bc570c8 | 2288 | read_lock(&mrt_lock); |
6bd52143 | 2289 | cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); |
660b26dc ND |
2290 | if (!cache && skb->dev) { |
2291 | int vif = ip6mr_find_vif(mrt, skb->dev); | |
2292 | ||
2293 | if (vif >= 0) | |
2294 | cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, | |
2295 | vif); | |
2296 | } | |
7bc570c8 YH |
2297 | |
2298 | if (!cache) { | |
2299 | struct sk_buff *skb2; | |
2300 | struct ipv6hdr *iph; | |
2301 | struct net_device *dev; | |
2302 | int vif; | |
2303 | ||
2304 | if (nowait) { | |
2305 | read_unlock(&mrt_lock); | |
2306 | return -EAGAIN; | |
2307 | } | |
2308 | ||
2309 | dev = skb->dev; | |
63159f29 | 2310 | if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) { |
7bc570c8 YH |
2311 | read_unlock(&mrt_lock); |
2312 | return -ENODEV; | |
2313 | } | |
2314 | ||
2315 | /* really correct? */ | |
2316 | skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
2317 | if (!skb2) { | |
2318 | read_unlock(&mrt_lock); | |
2319 | return -ENOMEM; | |
2320 | } | |
2321 | ||
2322 | skb_reset_transport_header(skb2); | |
2323 | ||
2324 | skb_put(skb2, sizeof(struct ipv6hdr)); | |
2325 | skb_reset_network_header(skb2); | |
2326 | ||
2327 | iph = ipv6_hdr(skb2); | |
2328 | iph->version = 0; | |
2329 | iph->priority = 0; | |
2330 | iph->flow_lbl[0] = 0; | |
2331 | iph->flow_lbl[1] = 0; | |
2332 | iph->flow_lbl[2] = 0; | |
2333 | iph->payload_len = 0; | |
2334 | iph->nexthdr = IPPROTO_NONE; | |
2335 | iph->hop_limit = 0; | |
4e3fd7a0 AD |
2336 | iph->saddr = rt->rt6i_src.addr; |
2337 | iph->daddr = rt->rt6i_dst.addr; | |
7bc570c8 | 2338 | |
6bd52143 | 2339 | err = ip6mr_cache_unresolved(mrt, vif, skb2); |
7bc570c8 YH |
2340 | read_unlock(&mrt_lock); |
2341 | ||
2342 | return err; | |
2343 | } | |
2344 | ||
2345 | if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) | |
2346 | cache->mfc_flags |= MFC_NOTIFY; | |
2347 | ||
5b285cac | 2348 | err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); |
7bc570c8 YH |
2349 | read_unlock(&mrt_lock); |
2350 | return err; | |
2351 | } | |
2352 | ||
5b285cac | 2353 | static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, |
f518338b ND |
2354 | u32 portid, u32 seq, struct mfc6_cache *c, int cmd, |
2355 | int flags) | |
5b285cac PM |
2356 | { |
2357 | struct nlmsghdr *nlh; | |
2358 | struct rtmsg *rtm; | |
1eb99af5 | 2359 | int err; |
5b285cac | 2360 | |
f518338b | 2361 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
63159f29 | 2362 | if (!nlh) |
5b285cac PM |
2363 | return -EMSGSIZE; |
2364 | ||
2365 | rtm = nlmsg_data(nlh); | |
193c1e47 | 2366 | rtm->rtm_family = RTNL_FAMILY_IP6MR; |
5b285cac PM |
2367 | rtm->rtm_dst_len = 128; |
2368 | rtm->rtm_src_len = 128; | |
2369 | rtm->rtm_tos = 0; | |
2370 | rtm->rtm_table = mrt->id; | |
c78679e8 DM |
2371 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2372 | goto nla_put_failure; | |
1eb99af5 | 2373 | rtm->rtm_type = RTN_MULTICAST; |
5b285cac | 2374 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
9a68ac72 ND |
2375 | if (c->mfc_flags & MFC_STATIC) |
2376 | rtm->rtm_protocol = RTPROT_STATIC; | |
2377 | else | |
2378 | rtm->rtm_protocol = RTPROT_MROUTED; | |
5b285cac PM |
2379 | rtm->rtm_flags = 0; |
2380 | ||
930345ea JB |
2381 | if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) || |
2382 | nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp)) | |
c78679e8 | 2383 | goto nla_put_failure; |
1eb99af5 ND |
2384 | err = __ip6mr_fill_mroute(mrt, skb, c, rtm); |
2385 | /* do not break the dump if cache is unresolved */ | |
2386 | if (err < 0 && err != -ENOENT) | |
5b285cac PM |
2387 | goto nla_put_failure; |
2388 | ||
053c095a JB |
2389 | nlmsg_end(skb, nlh); |
2390 | return 0; | |
5b285cac PM |
2391 | |
2392 | nla_put_failure: | |
2393 | nlmsg_cancel(skb, nlh); | |
2394 | return -EMSGSIZE; | |
2395 | } | |
2396 | ||
812e44dd ND |
2397 | static int mr6_msgsize(bool unresolved, int maxvif) |
2398 | { | |
2399 | size_t len = | |
2400 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2401 | + nla_total_size(4) /* RTA_TABLE */ | |
2402 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ | |
2403 | + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ | |
2404 | ; | |
2405 | ||
2406 | if (!unresolved) | |
2407 | len = len | |
2408 | + nla_total_size(4) /* RTA_IIF */ | |
2409 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2410 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2411 | /* RTA_MFC_STATS */ | |
2412 | + nla_total_size(sizeof(struct rta_mfc_stats)) | |
2413 | ; | |
2414 | ||
2415 | return len; | |
2416 | } | |
2417 | ||
2418 | static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, | |
2419 | int cmd) | |
2420 | { | |
2421 | struct net *net = read_pnet(&mrt->net); | |
2422 | struct sk_buff *skb; | |
2423 | int err = -ENOBUFS; | |
2424 | ||
2425 | skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), | |
2426 | GFP_ATOMIC); | |
63159f29 | 2427 | if (!skb) |
812e44dd ND |
2428 | goto errout; |
2429 | ||
f518338b | 2430 | err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
812e44dd ND |
2431 | if (err < 0) |
2432 | goto errout; | |
2433 | ||
2434 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); | |
2435 | return; | |
2436 | ||
2437 | errout: | |
2438 | kfree_skb(skb); | |
2439 | if (err < 0) | |
2440 | rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); | |
2441 | } | |
2442 | ||
5b285cac PM |
2443 | static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2444 | { | |
2445 | struct net *net = sock_net(skb->sk); | |
2446 | struct mr6_table *mrt; | |
2447 | struct mfc6_cache *mfc; | |
2448 | unsigned int t = 0, s_t; | |
2449 | unsigned int h = 0, s_h; | |
2450 | unsigned int e = 0, s_e; | |
2451 | ||
2452 | s_t = cb->args[0]; | |
2453 | s_h = cb->args[1]; | |
2454 | s_e = cb->args[2]; | |
2455 | ||
2456 | read_lock(&mrt_lock); | |
2457 | ip6mr_for_each_table(mrt, net) { | |
2458 | if (t < s_t) | |
2459 | goto next_table; | |
2460 | if (t > s_t) | |
2461 | s_h = 0; | |
2462 | for (h = s_h; h < MFC6_LINES; h++) { | |
2463 | list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { | |
2464 | if (e < s_e) | |
2465 | goto next_entry; | |
2466 | if (ip6mr_fill_mroute(mrt, skb, | |
15e47304 | 2467 | NETLINK_CB(cb->skb).portid, |
5b285cac | 2468 | cb->nlh->nlmsg_seq, |
f518338b ND |
2469 | mfc, RTM_NEWROUTE, |
2470 | NLM_F_MULTI) < 0) | |
5b285cac PM |
2471 | goto done; |
2472 | next_entry: | |
2473 | e++; | |
2474 | } | |
2475 | e = s_e = 0; | |
2476 | } | |
1eb99af5 ND |
2477 | spin_lock_bh(&mfc_unres_lock); |
2478 | list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { | |
2479 | if (e < s_e) | |
2480 | goto next_entry2; | |
2481 | if (ip6mr_fill_mroute(mrt, skb, | |
2482 | NETLINK_CB(cb->skb).portid, | |
2483 | cb->nlh->nlmsg_seq, | |
f518338b ND |
2484 | mfc, RTM_NEWROUTE, |
2485 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2486 | spin_unlock_bh(&mfc_unres_lock); |
2487 | goto done; | |
2488 | } | |
2489 | next_entry2: | |
2490 | e++; | |
2491 | } | |
2492 | spin_unlock_bh(&mfc_unres_lock); | |
2493 | e = s_e = 0; | |
5b285cac PM |
2494 | s_h = 0; |
2495 | next_table: | |
2496 | t++; | |
2497 | } | |
2498 | done: | |
2499 | read_unlock(&mrt_lock); | |
2500 | ||
2501 | cb->args[2] = e; | |
2502 | cb->args[1] = h; | |
2503 | cb->args[0] = t; | |
2504 | ||
2505 | return skb->len; | |
2506 | } |