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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IP multicast routing support for mrouted 3.6/3.8 | |
3 | * | |
113aa838 | 4 | * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
5 | * Linux Consultancy and Custom Driver Development |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | * | |
1da177e4 LT |
12 | * Fixes: |
13 | * Michael Chastain : Incorrect size of copying. | |
14 | * Alan Cox : Added the cache manager code | |
15 | * Alan Cox : Fixed the clone/copy bug and device race. | |
16 | * Mike McLagan : Routing by source | |
17 | * Malcolm Beattie : Buffer handling fixes. | |
18 | * Alexey Kuznetsov : Double buffer free and other fixes. | |
19 | * SVR Anand : Fixed several multicast bugs and problems. | |
20 | * Alexey Kuznetsov : Status, optimisations and more. | |
21 | * Brad Parker : Better behaviour on mrouted upcall | |
22 | * overflow. | |
23 | * Carlos Picoto : PIMv1 Support | |
24 | * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header | |
f77f13e2 | 25 | * Relax this requirement to work with older peers. |
1da177e4 LT |
26 | * |
27 | */ | |
28 | ||
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
1da177e4 | 30 | #include <linux/types.h> |
4fc268d2 | 31 | #include <linux/capability.h> |
1da177e4 LT |
32 | #include <linux/errno.h> |
33 | #include <linux/timer.h> | |
34 | #include <linux/mm.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/stat.h> | |
38 | #include <linux/socket.h> | |
39 | #include <linux/in.h> | |
40 | #include <linux/inet.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/inetdevice.h> | |
43 | #include <linux/igmp.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
46 | #include <linux/mroute.h> | |
47 | #include <linux/init.h> | |
46f25dff | 48 | #include <linux/if_ether.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
457c4cbc | 50 | #include <net/net_namespace.h> |
1da177e4 LT |
51 | #include <net/ip.h> |
52 | #include <net/protocol.h> | |
53 | #include <linux/skbuff.h> | |
14c85021 | 54 | #include <net/route.h> |
1da177e4 LT |
55 | #include <net/sock.h> |
56 | #include <net/icmp.h> | |
57 | #include <net/udp.h> | |
58 | #include <net/raw.h> | |
59 | #include <linux/notifier.h> | |
60 | #include <linux/if_arp.h> | |
61 | #include <linux/netfilter_ipv4.h> | |
709b46e8 | 62 | #include <linux/compat.h> |
bc3b2d7f | 63 | #include <linux/export.h> |
c5441932 | 64 | #include <net/ip_tunnels.h> |
1da177e4 | 65 | #include <net/checksum.h> |
dc5fc579 | 66 | #include <net/netlink.h> |
f0ad0860 | 67 | #include <net/fib_rules.h> |
d67b8c61 | 68 | #include <linux/netconf.h> |
ccbb0aa6 | 69 | #include <net/nexthop.h> |
5d8b3e69 | 70 | #include <net/switchdev.h> |
1da177e4 | 71 | |
f0ad0860 PM |
72 | struct ipmr_rule { |
73 | struct fib_rule common; | |
74 | }; | |
75 | ||
76 | struct ipmr_result { | |
77 | struct mr_table *mrt; | |
78 | }; | |
79 | ||
1da177e4 | 80 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
a8cb16dd | 81 | * Note that the changes are semaphored via rtnl_lock. |
1da177e4 LT |
82 | */ |
83 | ||
84 | static DEFINE_RWLOCK(mrt_lock); | |
85 | ||
7ef8f65d | 86 | /* Multicast router control variables */ |
1da177e4 | 87 | |
1da177e4 LT |
88 | /* Special spinlock for queue of unresolved entries */ |
89 | static DEFINE_SPINLOCK(mfc_unres_lock); | |
90 | ||
91 | /* We return to original Alan's scheme. Hash table of resolved | |
a8cb16dd ED |
92 | * entries is changed only in process context and protected |
93 | * with weak lock mrt_lock. Queue of unresolved entries is protected | |
94 | * with strong spinlock mfc_unres_lock. | |
95 | * | |
96 | * In this case data path is free of exclusive locks at all. | |
1da177e4 LT |
97 | */ |
98 | ||
e18b890b | 99 | static struct kmem_cache *mrt_cachep __read_mostly; |
1da177e4 | 100 | |
f0ad0860 | 101 | static struct mr_table *ipmr_new_table(struct net *net, u32 id); |
acbb219d FR |
102 | static void ipmr_free_table(struct mr_table *mrt); |
103 | ||
c4854ec8 | 104 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
4b1f0d33 DS |
105 | struct net_device *dev, struct sk_buff *skb, |
106 | struct mfc_cache *cache, int local); | |
0c12295a | 107 | static int ipmr_cache_report(struct mr_table *mrt, |
4feb88e5 | 108 | struct sk_buff *pkt, vifi_t vifi, int assert); |
cb6a4e46 PM |
109 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
110 | struct mfc_cache *c, struct rtmsg *rtm); | |
8cd3ac9f ND |
111 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, |
112 | int cmd); | |
5a645dd8 | 113 | static void igmpmsg_netlink_event(struct mr_table *mrt, struct sk_buff *pkt); |
0e615e96 | 114 | static void mroute_clean_tables(struct mr_table *mrt, bool all); |
e99e88a9 | 115 | static void ipmr_expire_process(struct timer_list *t); |
f0ad0860 PM |
116 | |
117 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES | |
118 | #define ipmr_for_each_table(mrt, net) \ | |
119 | list_for_each_entry_rcu(mrt, &net->ipv4.mr_tables, list) | |
120 | ||
121 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) | |
122 | { | |
123 | struct mr_table *mrt; | |
124 | ||
125 | ipmr_for_each_table(mrt, net) { | |
126 | if (mrt->id == id) | |
127 | return mrt; | |
128 | } | |
129 | return NULL; | |
130 | } | |
131 | ||
da91981b | 132 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
f0ad0860 PM |
133 | struct mr_table **mrt) |
134 | { | |
f0ad0860 | 135 | int err; |
95f4a45d HFS |
136 | struct ipmr_result res; |
137 | struct fib_lookup_arg arg = { | |
138 | .result = &res, | |
139 | .flags = FIB_LOOKUP_NOREF, | |
140 | }; | |
f0ad0860 | 141 | |
e58e4159 DA |
142 | /* update flow if oif or iif point to device enslaved to l3mdev */ |
143 | l3mdev_update_flow(net, flowi4_to_flowi(flp4)); | |
144 | ||
da91981b DM |
145 | err = fib_rules_lookup(net->ipv4.mr_rules_ops, |
146 | flowi4_to_flowi(flp4), 0, &arg); | |
f0ad0860 PM |
147 | if (err < 0) |
148 | return err; | |
149 | *mrt = res.mrt; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
154 | int flags, struct fib_lookup_arg *arg) | |
155 | { | |
156 | struct ipmr_result *res = arg->result; | |
157 | struct mr_table *mrt; | |
1da177e4 | 158 | |
f0ad0860 PM |
159 | switch (rule->action) { |
160 | case FR_ACT_TO_TBL: | |
161 | break; | |
162 | case FR_ACT_UNREACHABLE: | |
163 | return -ENETUNREACH; | |
164 | case FR_ACT_PROHIBIT: | |
165 | return -EACCES; | |
166 | case FR_ACT_BLACKHOLE: | |
167 | default: | |
168 | return -EINVAL; | |
169 | } | |
170 | ||
e58e4159 DA |
171 | arg->table = fib_rule_get_table(rule, arg); |
172 | ||
173 | mrt = ipmr_get_table(rule->fr_net, arg->table); | |
51456b29 | 174 | if (!mrt) |
f0ad0860 PM |
175 | return -EAGAIN; |
176 | res->mrt = mrt; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int ipmr_rule_match(struct fib_rule *rule, struct flowi *fl, int flags) | |
181 | { | |
182 | return 1; | |
183 | } | |
184 | ||
185 | static const struct nla_policy ipmr_rule_policy[FRA_MAX + 1] = { | |
186 | FRA_GENERIC_POLICY, | |
187 | }; | |
188 | ||
189 | static int ipmr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
190 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static int ipmr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
196 | struct nlattr **tb) | |
197 | { | |
198 | return 1; | |
199 | } | |
200 | ||
201 | static int ipmr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
202 | struct fib_rule_hdr *frh) | |
203 | { | |
204 | frh->dst_len = 0; | |
205 | frh->src_len = 0; | |
206 | frh->tos = 0; | |
207 | return 0; | |
208 | } | |
209 | ||
04a6f82c | 210 | static const struct fib_rules_ops __net_initconst ipmr_rules_ops_template = { |
25239cee | 211 | .family = RTNL_FAMILY_IPMR, |
f0ad0860 PM |
212 | .rule_size = sizeof(struct ipmr_rule), |
213 | .addr_size = sizeof(u32), | |
214 | .action = ipmr_rule_action, | |
215 | .match = ipmr_rule_match, | |
216 | .configure = ipmr_rule_configure, | |
217 | .compare = ipmr_rule_compare, | |
f0ad0860 PM |
218 | .fill = ipmr_rule_fill, |
219 | .nlgroup = RTNLGRP_IPV4_RULE, | |
220 | .policy = ipmr_rule_policy, | |
221 | .owner = THIS_MODULE, | |
222 | }; | |
223 | ||
224 | static int __net_init ipmr_rules_init(struct net *net) | |
225 | { | |
226 | struct fib_rules_ops *ops; | |
227 | struct mr_table *mrt; | |
228 | int err; | |
229 | ||
230 | ops = fib_rules_register(&ipmr_rules_ops_template, net); | |
231 | if (IS_ERR(ops)) | |
232 | return PTR_ERR(ops); | |
233 | ||
234 | INIT_LIST_HEAD(&net->ipv4.mr_tables); | |
235 | ||
236 | mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); | |
1113ebbc NA |
237 | if (IS_ERR(mrt)) { |
238 | err = PTR_ERR(mrt); | |
f0ad0860 PM |
239 | goto err1; |
240 | } | |
241 | ||
242 | err = fib_default_rule_add(ops, 0x7fff, RT_TABLE_DEFAULT, 0); | |
243 | if (err < 0) | |
244 | goto err2; | |
245 | ||
246 | net->ipv4.mr_rules_ops = ops; | |
247 | return 0; | |
248 | ||
249 | err2: | |
f243e5a7 | 250 | ipmr_free_table(mrt); |
f0ad0860 PM |
251 | err1: |
252 | fib_rules_unregister(ops); | |
253 | return err; | |
254 | } | |
255 | ||
256 | static void __net_exit ipmr_rules_exit(struct net *net) | |
257 | { | |
258 | struct mr_table *mrt, *next; | |
259 | ||
ed785309 | 260 | rtnl_lock(); |
035320d5 ED |
261 | list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) { |
262 | list_del(&mrt->list); | |
acbb219d | 263 | ipmr_free_table(mrt); |
035320d5 | 264 | } |
f0ad0860 | 265 | fib_rules_unregister(net->ipv4.mr_rules_ops); |
419df12f | 266 | rtnl_unlock(); |
f0ad0860 | 267 | } |
4d65b948 YG |
268 | |
269 | static int ipmr_rules_dump(struct net *net, struct notifier_block *nb) | |
270 | { | |
271 | return fib_rules_dump(net, nb, RTNL_FAMILY_IPMR); | |
272 | } | |
273 | ||
274 | static unsigned int ipmr_rules_seq_read(struct net *net) | |
275 | { | |
276 | return fib_rules_seq_read(net, RTNL_FAMILY_IPMR); | |
277 | } | |
478e4c2f YG |
278 | |
279 | bool ipmr_rule_default(const struct fib_rule *rule) | |
280 | { | |
281 | return fib_rule_matchall(rule) && rule->table == RT_TABLE_DEFAULT; | |
282 | } | |
283 | EXPORT_SYMBOL(ipmr_rule_default); | |
f0ad0860 PM |
284 | #else |
285 | #define ipmr_for_each_table(mrt, net) \ | |
286 | for (mrt = net->ipv4.mrt; mrt; mrt = NULL) | |
287 | ||
288 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) | |
289 | { | |
290 | return net->ipv4.mrt; | |
291 | } | |
292 | ||
da91981b | 293 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
f0ad0860 PM |
294 | struct mr_table **mrt) |
295 | { | |
296 | *mrt = net->ipv4.mrt; | |
297 | return 0; | |
298 | } | |
299 | ||
300 | static int __net_init ipmr_rules_init(struct net *net) | |
301 | { | |
1113ebbc NA |
302 | struct mr_table *mrt; |
303 | ||
304 | mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); | |
305 | if (IS_ERR(mrt)) | |
306 | return PTR_ERR(mrt); | |
307 | net->ipv4.mrt = mrt; | |
308 | return 0; | |
f0ad0860 PM |
309 | } |
310 | ||
311 | static void __net_exit ipmr_rules_exit(struct net *net) | |
312 | { | |
ed785309 | 313 | rtnl_lock(); |
acbb219d | 314 | ipmr_free_table(net->ipv4.mrt); |
ed785309 WC |
315 | net->ipv4.mrt = NULL; |
316 | rtnl_unlock(); | |
f0ad0860 | 317 | } |
4d65b948 YG |
318 | |
319 | static int ipmr_rules_dump(struct net *net, struct notifier_block *nb) | |
320 | { | |
321 | return 0; | |
322 | } | |
323 | ||
324 | static unsigned int ipmr_rules_seq_read(struct net *net) | |
325 | { | |
326 | return 0; | |
327 | } | |
478e4c2f YG |
328 | |
329 | bool ipmr_rule_default(const struct fib_rule *rule) | |
330 | { | |
331 | return true; | |
332 | } | |
333 | EXPORT_SYMBOL(ipmr_rule_default); | |
f0ad0860 PM |
334 | #endif |
335 | ||
8fb472c0 NA |
336 | static inline int ipmr_hash_cmp(struct rhashtable_compare_arg *arg, |
337 | const void *ptr) | |
338 | { | |
339 | const struct mfc_cache_cmp_arg *cmparg = arg->key; | |
340 | struct mfc_cache *c = (struct mfc_cache *)ptr; | |
341 | ||
342 | return cmparg->mfc_mcastgrp != c->mfc_mcastgrp || | |
343 | cmparg->mfc_origin != c->mfc_origin; | |
344 | } | |
345 | ||
346 | static const struct rhashtable_params ipmr_rht_params = { | |
347 | .head_offset = offsetof(struct mfc_cache, mnode), | |
348 | .key_offset = offsetof(struct mfc_cache, cmparg), | |
349 | .key_len = sizeof(struct mfc_cache_cmp_arg), | |
350 | .nelem_hint = 3, | |
351 | .locks_mul = 1, | |
352 | .obj_cmpfn = ipmr_hash_cmp, | |
353 | .automatic_shrinking = true, | |
354 | }; | |
355 | ||
f0ad0860 PM |
356 | static struct mr_table *ipmr_new_table(struct net *net, u32 id) |
357 | { | |
358 | struct mr_table *mrt; | |
1da177e4 | 359 | |
1113ebbc NA |
360 | /* "pimreg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
361 | if (id != RT_TABLE_DEFAULT && id >= 1000000000) | |
362 | return ERR_PTR(-EINVAL); | |
363 | ||
f0ad0860 | 364 | mrt = ipmr_get_table(net, id); |
00db4124 | 365 | if (mrt) |
f0ad0860 PM |
366 | return mrt; |
367 | ||
368 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
51456b29 | 369 | if (!mrt) |
1113ebbc | 370 | return ERR_PTR(-ENOMEM); |
8de53dfb | 371 | write_pnet(&mrt->net, net); |
f0ad0860 PM |
372 | mrt->id = id; |
373 | ||
8fb472c0 NA |
374 | rhltable_init(&mrt->mfc_hash, &ipmr_rht_params); |
375 | INIT_LIST_HEAD(&mrt->mfc_cache_list); | |
f0ad0860 PM |
376 | INIT_LIST_HEAD(&mrt->mfc_unres_queue); |
377 | ||
e99e88a9 | 378 | timer_setup(&mrt->ipmr_expire_timer, ipmr_expire_process, 0); |
f0ad0860 | 379 | |
f0ad0860 | 380 | mrt->mroute_reg_vif_num = -1; |
f0ad0860 PM |
381 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
382 | list_add_tail_rcu(&mrt->list, &net->ipv4.mr_tables); | |
383 | #endif | |
384 | return mrt; | |
385 | } | |
1da177e4 | 386 | |
acbb219d FR |
387 | static void ipmr_free_table(struct mr_table *mrt) |
388 | { | |
389 | del_timer_sync(&mrt->ipmr_expire_timer); | |
0e615e96 | 390 | mroute_clean_tables(mrt, true); |
8fb472c0 | 391 | rhltable_destroy(&mrt->mfc_hash); |
acbb219d FR |
392 | kfree(mrt); |
393 | } | |
394 | ||
1da177e4 LT |
395 | /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ |
396 | ||
d607032d WC |
397 | static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) |
398 | { | |
4feb88e5 BT |
399 | struct net *net = dev_net(dev); |
400 | ||
d607032d WC |
401 | dev_close(dev); |
402 | ||
4feb88e5 | 403 | dev = __dev_get_by_name(net, "tunl0"); |
d607032d | 404 | if (dev) { |
5bc3eb7e | 405 | const struct net_device_ops *ops = dev->netdev_ops; |
d607032d | 406 | struct ifreq ifr; |
d607032d WC |
407 | struct ip_tunnel_parm p; |
408 | ||
409 | memset(&p, 0, sizeof(p)); | |
410 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
411 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
412 | p.iph.version = 4; | |
413 | p.iph.ihl = 5; | |
414 | p.iph.protocol = IPPROTO_IPIP; | |
415 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
416 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; | |
417 | ||
5bc3eb7e SH |
418 | if (ops->ndo_do_ioctl) { |
419 | mm_segment_t oldfs = get_fs(); | |
420 | ||
421 | set_fs(KERNEL_DS); | |
422 | ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); | |
423 | set_fs(oldfs); | |
424 | } | |
d607032d WC |
425 | } |
426 | } | |
427 | ||
a0b47736 NA |
428 | /* Initialize ipmr pimreg/tunnel in_device */ |
429 | static bool ipmr_init_vif_indev(const struct net_device *dev) | |
430 | { | |
431 | struct in_device *in_dev; | |
432 | ||
433 | ASSERT_RTNL(); | |
434 | ||
435 | in_dev = __in_dev_get_rtnl(dev); | |
436 | if (!in_dev) | |
437 | return false; | |
438 | ipv4_devconf_setall(in_dev); | |
439 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
440 | IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; | |
441 | ||
442 | return true; | |
443 | } | |
444 | ||
7ef8f65d | 445 | static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v) |
1da177e4 LT |
446 | { |
447 | struct net_device *dev; | |
448 | ||
4feb88e5 | 449 | dev = __dev_get_by_name(net, "tunl0"); |
1da177e4 LT |
450 | |
451 | if (dev) { | |
5bc3eb7e | 452 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 LT |
453 | int err; |
454 | struct ifreq ifr; | |
1da177e4 | 455 | struct ip_tunnel_parm p; |
1da177e4 LT |
456 | |
457 | memset(&p, 0, sizeof(p)); | |
458 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
459 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
460 | p.iph.version = 4; | |
461 | p.iph.ihl = 5; | |
462 | p.iph.protocol = IPPROTO_IPIP; | |
463 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
ba93ef74 | 464 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 465 | |
5bc3eb7e SH |
466 | if (ops->ndo_do_ioctl) { |
467 | mm_segment_t oldfs = get_fs(); | |
468 | ||
469 | set_fs(KERNEL_DS); | |
470 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
471 | set_fs(oldfs); | |
a8cb16dd | 472 | } else { |
5bc3eb7e | 473 | err = -EOPNOTSUPP; |
a8cb16dd | 474 | } |
1da177e4 LT |
475 | dev = NULL; |
476 | ||
4feb88e5 BT |
477 | if (err == 0 && |
478 | (dev = __dev_get_by_name(net, p.name)) != NULL) { | |
1da177e4 | 479 | dev->flags |= IFF_MULTICAST; |
a0b47736 | 480 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 481 | goto failure; |
1da177e4 LT |
482 | if (dev_open(dev)) |
483 | goto failure; | |
7dc00c82 | 484 | dev_hold(dev); |
1da177e4 LT |
485 | } |
486 | } | |
487 | return dev; | |
488 | ||
489 | failure: | |
1da177e4 LT |
490 | unregister_netdevice(dev); |
491 | return NULL; | |
492 | } | |
493 | ||
c316c629 | 494 | #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) |
6fef4c0c | 495 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 496 | { |
4feb88e5 | 497 | struct net *net = dev_net(dev); |
f0ad0860 | 498 | struct mr_table *mrt; |
da91981b DM |
499 | struct flowi4 fl4 = { |
500 | .flowi4_oif = dev->ifindex, | |
6a662719 | 501 | .flowi4_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
da91981b | 502 | .flowi4_mark = skb->mark, |
f0ad0860 PM |
503 | }; |
504 | int err; | |
505 | ||
da91981b | 506 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
e40dbc51 BG |
507 | if (err < 0) { |
508 | kfree_skb(skb); | |
f0ad0860 | 509 | return err; |
e40dbc51 | 510 | } |
4feb88e5 | 511 | |
1da177e4 | 512 | read_lock(&mrt_lock); |
cf3677ae PE |
513 | dev->stats.tx_bytes += skb->len; |
514 | dev->stats.tx_packets++; | |
0c12295a | 515 | ipmr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, IGMPMSG_WHOLEPKT); |
1da177e4 LT |
516 | read_unlock(&mrt_lock); |
517 | kfree_skb(skb); | |
6ed10654 | 518 | return NETDEV_TX_OK; |
1da177e4 LT |
519 | } |
520 | ||
ee9b9596 ND |
521 | static int reg_vif_get_iflink(const struct net_device *dev) |
522 | { | |
523 | return 0; | |
524 | } | |
525 | ||
007c3838 SH |
526 | static const struct net_device_ops reg_vif_netdev_ops = { |
527 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 528 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
529 | }; |
530 | ||
1da177e4 LT |
531 | static void reg_vif_setup(struct net_device *dev) |
532 | { | |
533 | dev->type = ARPHRD_PIMREG; | |
46f25dff | 534 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; |
1da177e4 | 535 | dev->flags = IFF_NOARP; |
70cb4a45 | 536 | dev->netdev_ops = ®_vif_netdev_ops; |
cf124db5 | 537 | dev->needs_free_netdev = true; |
403dbb97 | 538 | dev->features |= NETIF_F_NETNS_LOCAL; |
1da177e4 LT |
539 | } |
540 | ||
f0ad0860 | 541 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) |
1da177e4 LT |
542 | { |
543 | struct net_device *dev; | |
f0ad0860 | 544 | char name[IFNAMSIZ]; |
1da177e4 | 545 | |
f0ad0860 PM |
546 | if (mrt->id == RT_TABLE_DEFAULT) |
547 | sprintf(name, "pimreg"); | |
548 | else | |
549 | sprintf(name, "pimreg%u", mrt->id); | |
1da177e4 | 550 | |
c835a677 | 551 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
1da177e4 | 552 | |
51456b29 | 553 | if (!dev) |
1da177e4 LT |
554 | return NULL; |
555 | ||
403dbb97 TG |
556 | dev_net_set(dev, net); |
557 | ||
1da177e4 LT |
558 | if (register_netdevice(dev)) { |
559 | free_netdev(dev); | |
560 | return NULL; | |
561 | } | |
1da177e4 | 562 | |
a0b47736 | 563 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 564 | goto failure; |
1da177e4 LT |
565 | if (dev_open(dev)) |
566 | goto failure; | |
567 | ||
7dc00c82 WC |
568 | dev_hold(dev); |
569 | ||
1da177e4 LT |
570 | return dev; |
571 | ||
572 | failure: | |
1da177e4 LT |
573 | unregister_netdevice(dev); |
574 | return NULL; | |
575 | } | |
c316c629 NA |
576 | |
577 | /* called with rcu_read_lock() */ | |
578 | static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, | |
579 | unsigned int pimlen) | |
580 | { | |
581 | struct net_device *reg_dev = NULL; | |
582 | struct iphdr *encap; | |
583 | ||
584 | encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); | |
7ef8f65d | 585 | /* Check that: |
c316c629 NA |
586 | * a. packet is really sent to a multicast group |
587 | * b. packet is not a NULL-REGISTER | |
588 | * c. packet is not truncated | |
589 | */ | |
590 | if (!ipv4_is_multicast(encap->daddr) || | |
591 | encap->tot_len == 0 || | |
592 | ntohs(encap->tot_len) + pimlen > skb->len) | |
593 | return 1; | |
594 | ||
595 | read_lock(&mrt_lock); | |
596 | if (mrt->mroute_reg_vif_num >= 0) | |
597 | reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev; | |
598 | read_unlock(&mrt_lock); | |
599 | ||
600 | if (!reg_dev) | |
601 | return 1; | |
602 | ||
603 | skb->mac_header = skb->network_header; | |
604 | skb_pull(skb, (u8 *)encap - skb->data); | |
605 | skb_reset_network_header(skb); | |
606 | skb->protocol = htons(ETH_P_IP); | |
607 | skb->ip_summed = CHECKSUM_NONE; | |
608 | ||
609 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); | |
610 | ||
611 | netif_rx(skb); | |
612 | ||
613 | return NET_RX_SUCCESS; | |
614 | } | |
615 | #else | |
616 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) | |
617 | { | |
618 | return NULL; | |
619 | } | |
1da177e4 LT |
620 | #endif |
621 | ||
4d65b948 YG |
622 | static int call_ipmr_vif_entry_notifier(struct notifier_block *nb, |
623 | struct net *net, | |
624 | enum fib_event_type event_type, | |
625 | struct vif_device *vif, | |
626 | vifi_t vif_index, u32 tb_id) | |
627 | { | |
628 | struct vif_entry_notifier_info info = { | |
629 | .info = { | |
630 | .family = RTNL_FAMILY_IPMR, | |
631 | .net = net, | |
632 | }, | |
633 | .dev = vif->dev, | |
634 | .vif_index = vif_index, | |
635 | .vif_flags = vif->flags, | |
636 | .tb_id = tb_id, | |
637 | }; | |
638 | ||
639 | return call_fib_notifier(nb, net, event_type, &info.info); | |
640 | } | |
641 | ||
b362053a YG |
642 | static int call_ipmr_vif_entry_notifiers(struct net *net, |
643 | enum fib_event_type event_type, | |
644 | struct vif_device *vif, | |
645 | vifi_t vif_index, u32 tb_id) | |
646 | { | |
647 | struct vif_entry_notifier_info info = { | |
648 | .info = { | |
649 | .family = RTNL_FAMILY_IPMR, | |
650 | .net = net, | |
651 | }, | |
652 | .dev = vif->dev, | |
653 | .vif_index = vif_index, | |
654 | .vif_flags = vif->flags, | |
655 | .tb_id = tb_id, | |
656 | }; | |
657 | ||
658 | ASSERT_RTNL(); | |
659 | net->ipv4.ipmr_seq++; | |
660 | return call_fib_notifiers(net, event_type, &info.info); | |
661 | } | |
662 | ||
4d65b948 YG |
663 | static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb, |
664 | struct net *net, | |
665 | enum fib_event_type event_type, | |
666 | struct mfc_cache *mfc, u32 tb_id) | |
667 | { | |
668 | struct mfc_entry_notifier_info info = { | |
669 | .info = { | |
670 | .family = RTNL_FAMILY_IPMR, | |
671 | .net = net, | |
672 | }, | |
673 | .mfc = mfc, | |
674 | .tb_id = tb_id | |
675 | }; | |
676 | ||
677 | return call_fib_notifier(nb, net, event_type, &info.info); | |
678 | } | |
679 | ||
b362053a YG |
680 | static int call_ipmr_mfc_entry_notifiers(struct net *net, |
681 | enum fib_event_type event_type, | |
682 | struct mfc_cache *mfc, u32 tb_id) | |
683 | { | |
684 | struct mfc_entry_notifier_info info = { | |
685 | .info = { | |
686 | .family = RTNL_FAMILY_IPMR, | |
687 | .net = net, | |
688 | }, | |
689 | .mfc = mfc, | |
690 | .tb_id = tb_id | |
691 | }; | |
692 | ||
693 | ASSERT_RTNL(); | |
694 | net->ipv4.ipmr_seq++; | |
695 | return call_fib_notifiers(net, event_type, &info.info); | |
696 | } | |
697 | ||
2c53040f BH |
698 | /** |
699 | * vif_delete - Delete a VIF entry | |
7dc00c82 | 700 | * @notify: Set to 1, if the caller is a notifier_call |
1da177e4 | 701 | */ |
0c12295a | 702 | static int vif_delete(struct mr_table *mrt, int vifi, int notify, |
d17fa6fa | 703 | struct list_head *head) |
1da177e4 | 704 | { |
b362053a | 705 | struct net *net = read_pnet(&mrt->net); |
1da177e4 LT |
706 | struct vif_device *v; |
707 | struct net_device *dev; | |
708 | struct in_device *in_dev; | |
709 | ||
0c12295a | 710 | if (vifi < 0 || vifi >= mrt->maxvif) |
1da177e4 LT |
711 | return -EADDRNOTAVAIL; |
712 | ||
0c12295a | 713 | v = &mrt->vif_table[vifi]; |
1da177e4 | 714 | |
b362053a YG |
715 | if (VIF_EXISTS(mrt, vifi)) |
716 | call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_DEL, v, vifi, | |
717 | mrt->id); | |
718 | ||
1da177e4 LT |
719 | write_lock_bh(&mrt_lock); |
720 | dev = v->dev; | |
721 | v->dev = NULL; | |
722 | ||
723 | if (!dev) { | |
724 | write_unlock_bh(&mrt_lock); | |
725 | return -EADDRNOTAVAIL; | |
726 | } | |
727 | ||
0c12295a PM |
728 | if (vifi == mrt->mroute_reg_vif_num) |
729 | mrt->mroute_reg_vif_num = -1; | |
1da177e4 | 730 | |
a8cb16dd | 731 | if (vifi + 1 == mrt->maxvif) { |
1da177e4 | 732 | int tmp; |
a8cb16dd ED |
733 | |
734 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
0c12295a | 735 | if (VIF_EXISTS(mrt, tmp)) |
1da177e4 LT |
736 | break; |
737 | } | |
0c12295a | 738 | mrt->maxvif = tmp+1; |
1da177e4 LT |
739 | } |
740 | ||
741 | write_unlock_bh(&mrt_lock); | |
742 | ||
743 | dev_set_allmulti(dev, -1); | |
744 | ||
a8cb16dd ED |
745 | in_dev = __in_dev_get_rtnl(dev); |
746 | if (in_dev) { | |
42f811b8 | 747 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; |
3b022865 | 748 | inet_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
749 | NETCONFA_MC_FORWARDING, |
750 | dev->ifindex, &in_dev->cnf); | |
1da177e4 LT |
751 | ip_rt_multicast_event(in_dev); |
752 | } | |
753 | ||
a8cb16dd | 754 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER) && !notify) |
d17fa6fa | 755 | unregister_netdevice_queue(dev, head); |
1da177e4 LT |
756 | |
757 | dev_put(dev); | |
758 | return 0; | |
759 | } | |
760 | ||
a8c9486b | 761 | static void ipmr_cache_free_rcu(struct rcu_head *head) |
5c0a66f5 | 762 | { |
a8c9486b ED |
763 | struct mfc_cache *c = container_of(head, struct mfc_cache, rcu); |
764 | ||
5c0a66f5 BT |
765 | kmem_cache_free(mrt_cachep, c); |
766 | } | |
767 | ||
310ebbba | 768 | void ipmr_cache_free(struct mfc_cache *c) |
a8c9486b ED |
769 | { |
770 | call_rcu(&c->rcu, ipmr_cache_free_rcu); | |
771 | } | |
310ebbba | 772 | EXPORT_SYMBOL(ipmr_cache_free); |
a8c9486b | 773 | |
1da177e4 | 774 | /* Destroy an unresolved cache entry, killing queued skbs |
a8cb16dd | 775 | * and reporting error to netlink readers. |
1da177e4 | 776 | */ |
0c12295a | 777 | static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) |
1da177e4 | 778 | { |
8de53dfb | 779 | struct net *net = read_pnet(&mrt->net); |
1da177e4 | 780 | struct sk_buff *skb; |
9ef1d4c7 | 781 | struct nlmsgerr *e; |
1da177e4 | 782 | |
0c12295a | 783 | atomic_dec(&mrt->cache_resolve_queue_len); |
1da177e4 | 784 | |
c354e124 | 785 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) { |
eddc9ec5 | 786 | if (ip_hdr(skb)->version == 0) { |
af72868b JB |
787 | struct nlmsghdr *nlh = skb_pull(skb, |
788 | sizeof(struct iphdr)); | |
1da177e4 | 789 | nlh->nlmsg_type = NLMSG_ERROR; |
573ce260 | 790 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 791 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 792 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
793 | e->error = -ETIMEDOUT; |
794 | memset(&e->msg, 0, sizeof(e->msg)); | |
2942e900 | 795 | |
15e47304 | 796 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 797 | } else { |
1da177e4 | 798 | kfree_skb(skb); |
a8cb16dd | 799 | } |
1da177e4 LT |
800 | } |
801 | ||
5c0a66f5 | 802 | ipmr_cache_free(c); |
1da177e4 LT |
803 | } |
804 | ||
e258beb2 | 805 | /* Timer process for the unresolved queue. */ |
e99e88a9 | 806 | static void ipmr_expire_process(struct timer_list *t) |
1da177e4 | 807 | { |
e99e88a9 | 808 | struct mr_table *mrt = from_timer(mrt, t, ipmr_expire_timer); |
1da177e4 LT |
809 | unsigned long now; |
810 | unsigned long expires; | |
862465f2 | 811 | struct mfc_cache *c, *next; |
1da177e4 LT |
812 | |
813 | if (!spin_trylock(&mfc_unres_lock)) { | |
0c12295a | 814 | mod_timer(&mrt->ipmr_expire_timer, jiffies+HZ/10); |
1da177e4 LT |
815 | return; |
816 | } | |
817 | ||
0c12295a | 818 | if (list_empty(&mrt->mfc_unres_queue)) |
1da177e4 LT |
819 | goto out; |
820 | ||
821 | now = jiffies; | |
822 | expires = 10*HZ; | |
1da177e4 | 823 | |
0c12295a | 824 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
1da177e4 LT |
825 | if (time_after(c->mfc_un.unres.expires, now)) { |
826 | unsigned long interval = c->mfc_un.unres.expires - now; | |
827 | if (interval < expires) | |
828 | expires = interval; | |
1da177e4 LT |
829 | continue; |
830 | } | |
831 | ||
862465f2 | 832 | list_del(&c->list); |
8cd3ac9f | 833 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 834 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
835 | } |
836 | ||
0c12295a PM |
837 | if (!list_empty(&mrt->mfc_unres_queue)) |
838 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
1da177e4 LT |
839 | |
840 | out: | |
841 | spin_unlock(&mfc_unres_lock); | |
842 | } | |
843 | ||
844 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
0c12295a | 845 | static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache, |
d658f8a0 | 846 | unsigned char *ttls) |
1da177e4 LT |
847 | { |
848 | int vifi; | |
849 | ||
850 | cache->mfc_un.res.minvif = MAXVIFS; | |
851 | cache->mfc_un.res.maxvif = 0; | |
852 | memset(cache->mfc_un.res.ttls, 255, MAXVIFS); | |
853 | ||
0c12295a PM |
854 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
855 | if (VIF_EXISTS(mrt, vifi) && | |
cf958ae3 | 856 | ttls[vifi] && ttls[vifi] < 255) { |
1da177e4 LT |
857 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
858 | if (cache->mfc_un.res.minvif > vifi) | |
859 | cache->mfc_un.res.minvif = vifi; | |
860 | if (cache->mfc_un.res.maxvif <= vifi) | |
861 | cache->mfc_un.res.maxvif = vifi + 1; | |
862 | } | |
863 | } | |
90b5ca17 | 864 | cache->mfc_un.res.lastuse = jiffies; |
1da177e4 LT |
865 | } |
866 | ||
0c12295a PM |
867 | static int vif_add(struct net *net, struct mr_table *mrt, |
868 | struct vifctl *vifc, int mrtsock) | |
1da177e4 LT |
869 | { |
870 | int vifi = vifc->vifc_vifi; | |
5d8b3e69 YG |
871 | struct switchdev_attr attr = { |
872 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
873 | }; | |
0c12295a | 874 | struct vif_device *v = &mrt->vif_table[vifi]; |
1da177e4 LT |
875 | struct net_device *dev; |
876 | struct in_device *in_dev; | |
d607032d | 877 | int err; |
1da177e4 LT |
878 | |
879 | /* Is vif busy ? */ | |
0c12295a | 880 | if (VIF_EXISTS(mrt, vifi)) |
1da177e4 LT |
881 | return -EADDRINUSE; |
882 | ||
883 | switch (vifc->vifc_flags) { | |
1da177e4 | 884 | case VIFF_REGISTER: |
1973a4ea | 885 | if (!ipmr_pimsm_enabled()) |
c316c629 NA |
886 | return -EINVAL; |
887 | /* Special Purpose VIF in PIM | |
1da177e4 LT |
888 | * All the packets will be sent to the daemon |
889 | */ | |
0c12295a | 890 | if (mrt->mroute_reg_vif_num >= 0) |
1da177e4 | 891 | return -EADDRINUSE; |
f0ad0860 | 892 | dev = ipmr_reg_vif(net, mrt); |
1da177e4 LT |
893 | if (!dev) |
894 | return -ENOBUFS; | |
d607032d WC |
895 | err = dev_set_allmulti(dev, 1); |
896 | if (err) { | |
897 | unregister_netdevice(dev); | |
7dc00c82 | 898 | dev_put(dev); |
d607032d WC |
899 | return err; |
900 | } | |
1da177e4 | 901 | break; |
e905a9ed | 902 | case VIFF_TUNNEL: |
4feb88e5 | 903 | dev = ipmr_new_tunnel(net, vifc); |
1da177e4 LT |
904 | if (!dev) |
905 | return -ENOBUFS; | |
d607032d WC |
906 | err = dev_set_allmulti(dev, 1); |
907 | if (err) { | |
908 | ipmr_del_tunnel(dev, vifc); | |
7dc00c82 | 909 | dev_put(dev); |
d607032d WC |
910 | return err; |
911 | } | |
1da177e4 | 912 | break; |
ee5e81f0 | 913 | case VIFF_USE_IFINDEX: |
1da177e4 | 914 | case 0: |
ee5e81f0 I |
915 | if (vifc->vifc_flags == VIFF_USE_IFINDEX) { |
916 | dev = dev_get_by_index(net, vifc->vifc_lcl_ifindex); | |
51456b29 | 917 | if (dev && !__in_dev_get_rtnl(dev)) { |
ee5e81f0 I |
918 | dev_put(dev); |
919 | return -EADDRNOTAVAIL; | |
920 | } | |
a8cb16dd | 921 | } else { |
ee5e81f0 | 922 | dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr); |
a8cb16dd | 923 | } |
1da177e4 LT |
924 | if (!dev) |
925 | return -EADDRNOTAVAIL; | |
d607032d | 926 | err = dev_set_allmulti(dev, 1); |
7dc00c82 WC |
927 | if (err) { |
928 | dev_put(dev); | |
d607032d | 929 | return err; |
7dc00c82 | 930 | } |
1da177e4 LT |
931 | break; |
932 | default: | |
933 | return -EINVAL; | |
934 | } | |
935 | ||
a8cb16dd ED |
936 | in_dev = __in_dev_get_rtnl(dev); |
937 | if (!in_dev) { | |
d0490cfd | 938 | dev_put(dev); |
1da177e4 | 939 | return -EADDRNOTAVAIL; |
d0490cfd | 940 | } |
42f811b8 | 941 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; |
3b022865 DA |
942 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_MC_FORWARDING, |
943 | dev->ifindex, &in_dev->cnf); | |
1da177e4 LT |
944 | ip_rt_multicast_event(in_dev); |
945 | ||
a8cb16dd ED |
946 | /* Fill in the VIF structures */ |
947 | ||
5d8b3e69 YG |
948 | attr.orig_dev = dev; |
949 | if (!switchdev_port_attr_get(dev, &attr)) { | |
950 | memcpy(v->dev_parent_id.id, attr.u.ppid.id, attr.u.ppid.id_len); | |
951 | v->dev_parent_id.id_len = attr.u.ppid.id_len; | |
952 | } else { | |
953 | v->dev_parent_id.id_len = 0; | |
954 | } | |
c354e124 JK |
955 | v->rate_limit = vifc->vifc_rate_limit; |
956 | v->local = vifc->vifc_lcl_addr.s_addr; | |
957 | v->remote = vifc->vifc_rmt_addr.s_addr; | |
958 | v->flags = vifc->vifc_flags; | |
1da177e4 LT |
959 | if (!mrtsock) |
960 | v->flags |= VIFF_STATIC; | |
c354e124 | 961 | v->threshold = vifc->vifc_threshold; |
1da177e4 LT |
962 | v->bytes_in = 0; |
963 | v->bytes_out = 0; | |
964 | v->pkt_in = 0; | |
965 | v->pkt_out = 0; | |
966 | v->link = dev->ifindex; | |
a8cb16dd | 967 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER)) |
a54acb3a | 968 | v->link = dev_get_iflink(dev); |
1da177e4 LT |
969 | |
970 | /* And finish update writing critical data */ | |
971 | write_lock_bh(&mrt_lock); | |
c354e124 | 972 | v->dev = dev; |
a8cb16dd | 973 | if (v->flags & VIFF_REGISTER) |
0c12295a | 974 | mrt->mroute_reg_vif_num = vifi; |
0c12295a PM |
975 | if (vifi+1 > mrt->maxvif) |
976 | mrt->maxvif = vifi+1; | |
1da177e4 | 977 | write_unlock_bh(&mrt_lock); |
b362053a | 978 | call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_ADD, v, vifi, mrt->id); |
1da177e4 LT |
979 | return 0; |
980 | } | |
981 | ||
a8c9486b | 982 | /* called with rcu_read_lock() */ |
0c12295a | 983 | static struct mfc_cache *ipmr_cache_find(struct mr_table *mrt, |
4feb88e5 BT |
984 | __be32 origin, |
985 | __be32 mcastgrp) | |
1da177e4 | 986 | { |
8fb472c0 NA |
987 | struct mfc_cache_cmp_arg arg = { |
988 | .mfc_mcastgrp = mcastgrp, | |
989 | .mfc_origin = origin | |
990 | }; | |
991 | struct rhlist_head *tmp, *list; | |
1da177e4 LT |
992 | struct mfc_cache *c; |
993 | ||
8fb472c0 NA |
994 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
995 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
996 | return c; | |
997 | ||
862465f2 | 998 | return NULL; |
1da177e4 LT |
999 | } |
1000 | ||
660b26dc ND |
1001 | /* Look for a (*,*,oif) entry */ |
1002 | static struct mfc_cache *ipmr_cache_find_any_parent(struct mr_table *mrt, | |
1003 | int vifi) | |
1004 | { | |
8fb472c0 NA |
1005 | struct mfc_cache_cmp_arg arg = { |
1006 | .mfc_mcastgrp = htonl(INADDR_ANY), | |
1007 | .mfc_origin = htonl(INADDR_ANY) | |
1008 | }; | |
1009 | struct rhlist_head *tmp, *list; | |
660b26dc ND |
1010 | struct mfc_cache *c; |
1011 | ||
8fb472c0 NA |
1012 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
1013 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
1014 | if (c->mfc_un.res.ttls[vifi] < 255) | |
660b26dc ND |
1015 | return c; |
1016 | ||
1017 | return NULL; | |
1018 | } | |
1019 | ||
1020 | /* Look for a (*,G) entry */ | |
1021 | static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt, | |
1022 | __be32 mcastgrp, int vifi) | |
1023 | { | |
8fb472c0 NA |
1024 | struct mfc_cache_cmp_arg arg = { |
1025 | .mfc_mcastgrp = mcastgrp, | |
1026 | .mfc_origin = htonl(INADDR_ANY) | |
1027 | }; | |
1028 | struct rhlist_head *tmp, *list; | |
660b26dc ND |
1029 | struct mfc_cache *c, *proxy; |
1030 | ||
360eb5da | 1031 | if (mcastgrp == htonl(INADDR_ANY)) |
660b26dc ND |
1032 | goto skip; |
1033 | ||
8fb472c0 NA |
1034 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
1035 | rhl_for_each_entry_rcu(c, tmp, list, mnode) { | |
1036 | if (c->mfc_un.res.ttls[vifi] < 255) | |
1037 | return c; | |
1038 | ||
1039 | /* It's ok if the vifi is part of the static tree */ | |
1040 | proxy = ipmr_cache_find_any_parent(mrt, c->mfc_parent); | |
1041 | if (proxy && proxy->mfc_un.res.ttls[vifi] < 255) | |
1042 | return c; | |
1043 | } | |
660b26dc ND |
1044 | |
1045 | skip: | |
1046 | return ipmr_cache_find_any_parent(mrt, vifi); | |
1047 | } | |
1048 | ||
8fb472c0 NA |
1049 | /* Look for a (S,G,iif) entry if parent != -1 */ |
1050 | static struct mfc_cache *ipmr_cache_find_parent(struct mr_table *mrt, | |
1051 | __be32 origin, __be32 mcastgrp, | |
1052 | int parent) | |
1053 | { | |
1054 | struct mfc_cache_cmp_arg arg = { | |
1055 | .mfc_mcastgrp = mcastgrp, | |
1056 | .mfc_origin = origin, | |
1057 | }; | |
1058 | struct rhlist_head *tmp, *list; | |
1059 | struct mfc_cache *c; | |
1060 | ||
1061 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); | |
1062 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
1063 | if (parent == -1 || parent == c->mfc_parent) | |
1064 | return c; | |
1065 | ||
1066 | return NULL; | |
1067 | } | |
1068 | ||
7ef8f65d | 1069 | /* Allocate a multicast cache entry */ |
d658f8a0 | 1070 | static struct mfc_cache *ipmr_cache_alloc(void) |
1da177e4 | 1071 | { |
c354e124 | 1072 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
a8c9486b | 1073 | |
70a0dec4 TG |
1074 | if (c) { |
1075 | c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1; | |
a8c9486b | 1076 | c->mfc_un.res.minvif = MAXVIFS; |
310ebbba | 1077 | refcount_set(&c->mfc_un.res.refcount, 1); |
70a0dec4 | 1078 | } |
1da177e4 LT |
1079 | return c; |
1080 | } | |
1081 | ||
d658f8a0 | 1082 | static struct mfc_cache *ipmr_cache_alloc_unres(void) |
1da177e4 | 1083 | { |
c354e124 | 1084 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
a8c9486b ED |
1085 | |
1086 | if (c) { | |
1087 | skb_queue_head_init(&c->mfc_un.unres.unresolved); | |
1088 | c->mfc_un.unres.expires = jiffies + 10*HZ; | |
1089 | } | |
1da177e4 LT |
1090 | return c; |
1091 | } | |
1092 | ||
7ef8f65d | 1093 | /* A cache entry has gone into a resolved state from queued */ |
0c12295a PM |
1094 | static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt, |
1095 | struct mfc_cache *uc, struct mfc_cache *c) | |
1da177e4 LT |
1096 | { |
1097 | struct sk_buff *skb; | |
9ef1d4c7 | 1098 | struct nlmsgerr *e; |
1da177e4 | 1099 | |
a8cb16dd | 1100 | /* Play the pending entries through our router */ |
c354e124 | 1101 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
eddc9ec5 | 1102 | if (ip_hdr(skb)->version == 0) { |
af72868b JB |
1103 | struct nlmsghdr *nlh = skb_pull(skb, |
1104 | sizeof(struct iphdr)); | |
1da177e4 | 1105 | |
573ce260 | 1106 | if (__ipmr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
a8cb16dd ED |
1107 | nlh->nlmsg_len = skb_tail_pointer(skb) - |
1108 | (u8 *)nlh; | |
1da177e4 LT |
1109 | } else { |
1110 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1111 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 1112 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1113 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
1114 | e->error = -EMSGSIZE; |
1115 | memset(&e->msg, 0, sizeof(e->msg)); | |
1da177e4 | 1116 | } |
2942e900 | 1117 | |
15e47304 | 1118 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 1119 | } else { |
4b1f0d33 | 1120 | ip_mr_forward(net, mrt, skb->dev, skb, c, 0); |
a8cb16dd | 1121 | } |
1da177e4 LT |
1122 | } |
1123 | } | |
1124 | ||
5a645dd8 | 1125 | /* Bounce a cache query up to mrouted and netlink. |
1da177e4 | 1126 | * |
c316c629 | 1127 | * Called under mrt_lock. |
1da177e4 | 1128 | */ |
0c12295a | 1129 | static int ipmr_cache_report(struct mr_table *mrt, |
4feb88e5 | 1130 | struct sk_buff *pkt, vifi_t vifi, int assert) |
1da177e4 | 1131 | { |
c9bdd4b5 | 1132 | const int ihl = ip_hdrlen(pkt); |
c316c629 | 1133 | struct sock *mroute_sk; |
1da177e4 LT |
1134 | struct igmphdr *igmp; |
1135 | struct igmpmsg *msg; | |
c316c629 | 1136 | struct sk_buff *skb; |
1da177e4 LT |
1137 | int ret; |
1138 | ||
1da177e4 LT |
1139 | if (assert == IGMPMSG_WHOLEPKT) |
1140 | skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); | |
1141 | else | |
1da177e4 LT |
1142 | skb = alloc_skb(128, GFP_ATOMIC); |
1143 | ||
132adf54 | 1144 | if (!skb) |
1da177e4 LT |
1145 | return -ENOBUFS; |
1146 | ||
1da177e4 LT |
1147 | if (assert == IGMPMSG_WHOLEPKT) { |
1148 | /* Ugly, but we have no choice with this interface. | |
a8cb16dd ED |
1149 | * Duplicate old header, fix ihl, length etc. |
1150 | * And all this only to mangle msg->im_msgtype and | |
1151 | * to set msg->im_mbz to "mbz" :-) | |
1da177e4 | 1152 | */ |
878c8145 ACM |
1153 | skb_push(skb, sizeof(struct iphdr)); |
1154 | skb_reset_network_header(skb); | |
badff6d0 | 1155 | skb_reset_transport_header(skb); |
0272ffc4 | 1156 | msg = (struct igmpmsg *)skb_network_header(skb); |
d56f90a7 | 1157 | memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); |
1da177e4 LT |
1158 | msg->im_msgtype = IGMPMSG_WHOLEPKT; |
1159 | msg->im_mbz = 0; | |
0c12295a | 1160 | msg->im_vif = mrt->mroute_reg_vif_num; |
eddc9ec5 ACM |
1161 | ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; |
1162 | ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + | |
1163 | sizeof(struct iphdr)); | |
c316c629 NA |
1164 | } else { |
1165 | /* Copy the IP header */ | |
1166 | skb_set_network_header(skb, skb->len); | |
1167 | skb_put(skb, ihl); | |
1168 | skb_copy_to_linear_data(skb, pkt->data, ihl); | |
1169 | /* Flag to the kernel this is a route add */ | |
1170 | ip_hdr(skb)->protocol = 0; | |
1171 | msg = (struct igmpmsg *)skb_network_header(skb); | |
1172 | msg->im_vif = vifi; | |
1173 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); | |
1174 | /* Add our header */ | |
4df864c1 | 1175 | igmp = skb_put(skb, sizeof(struct igmphdr)); |
c316c629 NA |
1176 | igmp->type = assert; |
1177 | msg->im_msgtype = assert; | |
1178 | igmp->code = 0; | |
1179 | ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ | |
1180 | skb->transport_header = skb->network_header; | |
e905a9ed | 1181 | } |
1da177e4 | 1182 | |
4c968709 ED |
1183 | rcu_read_lock(); |
1184 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
51456b29 | 1185 | if (!mroute_sk) { |
4c968709 | 1186 | rcu_read_unlock(); |
1da177e4 LT |
1187 | kfree_skb(skb); |
1188 | return -EINVAL; | |
1189 | } | |
1190 | ||
5a645dd8 JG |
1191 | igmpmsg_netlink_event(mrt, skb); |
1192 | ||
a8cb16dd | 1193 | /* Deliver to mrouted */ |
4c968709 ED |
1194 | ret = sock_queue_rcv_skb(mroute_sk, skb); |
1195 | rcu_read_unlock(); | |
70a269e6 | 1196 | if (ret < 0) { |
e87cc472 | 1197 | net_warn_ratelimited("mroute: pending queue full, dropping entries\n"); |
1da177e4 LT |
1198 | kfree_skb(skb); |
1199 | } | |
1200 | ||
1201 | return ret; | |
1202 | } | |
1203 | ||
7ef8f65d NA |
1204 | /* Queue a packet for resolution. It gets locked cache entry! */ |
1205 | static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, | |
4b1f0d33 | 1206 | struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1207 | { |
8fb472c0 NA |
1208 | const struct iphdr *iph = ip_hdr(skb); |
1209 | struct mfc_cache *c; | |
862465f2 | 1210 | bool found = false; |
1da177e4 | 1211 | int err; |
1da177e4 LT |
1212 | |
1213 | spin_lock_bh(&mfc_unres_lock); | |
0c12295a | 1214 | list_for_each_entry(c, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1215 | if (c->mfc_mcastgrp == iph->daddr && |
862465f2 PM |
1216 | c->mfc_origin == iph->saddr) { |
1217 | found = true; | |
1da177e4 | 1218 | break; |
862465f2 | 1219 | } |
1da177e4 LT |
1220 | } |
1221 | ||
862465f2 | 1222 | if (!found) { |
a8cb16dd | 1223 | /* Create a new entry if allowable */ |
0c12295a | 1224 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
d658f8a0 | 1225 | (c = ipmr_cache_alloc_unres()) == NULL) { |
1da177e4 LT |
1226 | spin_unlock_bh(&mfc_unres_lock); |
1227 | ||
1228 | kfree_skb(skb); | |
1229 | return -ENOBUFS; | |
1230 | } | |
1231 | ||
a8cb16dd | 1232 | /* Fill in the new cache entry */ |
eddc9ec5 ACM |
1233 | c->mfc_parent = -1; |
1234 | c->mfc_origin = iph->saddr; | |
1235 | c->mfc_mcastgrp = iph->daddr; | |
1da177e4 | 1236 | |
a8cb16dd | 1237 | /* Reflect first query at mrouted. */ |
0c12295a | 1238 | err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE); |
4feb88e5 | 1239 | if (err < 0) { |
e905a9ed | 1240 | /* If the report failed throw the cache entry |
1da177e4 LT |
1241 | out - Brad Parker |
1242 | */ | |
1243 | spin_unlock_bh(&mfc_unres_lock); | |
1244 | ||
5c0a66f5 | 1245 | ipmr_cache_free(c); |
1da177e4 LT |
1246 | kfree_skb(skb); |
1247 | return err; | |
1248 | } | |
1249 | ||
0c12295a PM |
1250 | atomic_inc(&mrt->cache_resolve_queue_len); |
1251 | list_add(&c->list, &mrt->mfc_unres_queue); | |
8cd3ac9f | 1252 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 | 1253 | |
278554bd DM |
1254 | if (atomic_read(&mrt->cache_resolve_queue_len) == 1) |
1255 | mod_timer(&mrt->ipmr_expire_timer, c->mfc_un.unres.expires); | |
1da177e4 LT |
1256 | } |
1257 | ||
a8cb16dd | 1258 | /* See if we can append the packet */ |
a8cb16dd | 1259 | if (c->mfc_un.unres.unresolved.qlen > 3) { |
1da177e4 LT |
1260 | kfree_skb(skb); |
1261 | err = -ENOBUFS; | |
1262 | } else { | |
4b1f0d33 DS |
1263 | if (dev) { |
1264 | skb->dev = dev; | |
1265 | skb->skb_iif = dev->ifindex; | |
1266 | } | |
c354e124 | 1267 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); |
1da177e4 LT |
1268 | err = 0; |
1269 | } | |
1270 | ||
1271 | spin_unlock_bh(&mfc_unres_lock); | |
1272 | return err; | |
1273 | } | |
1274 | ||
7ef8f65d | 1275 | /* MFC cache manipulation by user space mroute daemon */ |
1da177e4 | 1276 | |
660b26dc | 1277 | static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent) |
1da177e4 | 1278 | { |
b362053a | 1279 | struct net *net = read_pnet(&mrt->net); |
8fb472c0 | 1280 | struct mfc_cache *c; |
1da177e4 | 1281 | |
8fb472c0 NA |
1282 | /* The entries are added/deleted only under RTNL */ |
1283 | rcu_read_lock(); | |
1284 | c = ipmr_cache_find_parent(mrt, mfc->mfcc_origin.s_addr, | |
1285 | mfc->mfcc_mcastgrp.s_addr, parent); | |
1286 | rcu_read_unlock(); | |
1287 | if (!c) | |
1288 | return -ENOENT; | |
1289 | rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params); | |
1290 | list_del_rcu(&c->list); | |
b362053a | 1291 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c, mrt->id); |
8fb472c0 | 1292 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
310ebbba | 1293 | ipmr_cache_put(c); |
1da177e4 | 1294 | |
8fb472c0 | 1295 | return 0; |
1da177e4 LT |
1296 | } |
1297 | ||
0c12295a | 1298 | static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, |
660b26dc | 1299 | struct mfcctl *mfc, int mrtsock, int parent) |
1da177e4 | 1300 | { |
862465f2 | 1301 | struct mfc_cache *uc, *c; |
8fb472c0 NA |
1302 | bool found; |
1303 | int ret; | |
1da177e4 | 1304 | |
a50436f2 PM |
1305 | if (mfc->mfcc_parent >= MAXVIFS) |
1306 | return -ENFILE; | |
1307 | ||
8fb472c0 NA |
1308 | /* The entries are added/deleted only under RTNL */ |
1309 | rcu_read_lock(); | |
1310 | c = ipmr_cache_find_parent(mrt, mfc->mfcc_origin.s_addr, | |
1311 | mfc->mfcc_mcastgrp.s_addr, parent); | |
1312 | rcu_read_unlock(); | |
1313 | if (c) { | |
1da177e4 LT |
1314 | write_lock_bh(&mrt_lock); |
1315 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1316 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1317 | if (!mrtsock) |
1318 | c->mfc_flags |= MFC_STATIC; | |
1319 | write_unlock_bh(&mrt_lock); | |
b362053a YG |
1320 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_REPLACE, c, |
1321 | mrt->id); | |
8cd3ac9f | 1322 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1323 | return 0; |
1324 | } | |
1325 | ||
360eb5da | 1326 | if (mfc->mfcc_mcastgrp.s_addr != htonl(INADDR_ANY) && |
660b26dc | 1327 | !ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) |
1da177e4 LT |
1328 | return -EINVAL; |
1329 | ||
d658f8a0 | 1330 | c = ipmr_cache_alloc(); |
51456b29 | 1331 | if (!c) |
1da177e4 LT |
1332 | return -ENOMEM; |
1333 | ||
c354e124 JK |
1334 | c->mfc_origin = mfc->mfcc_origin.s_addr; |
1335 | c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; | |
1336 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1337 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1338 | if (!mrtsock) |
1339 | c->mfc_flags |= MFC_STATIC; | |
1340 | ||
8fb472c0 NA |
1341 | ret = rhltable_insert_key(&mrt->mfc_hash, &c->cmparg, &c->mnode, |
1342 | ipmr_rht_params); | |
1343 | if (ret) { | |
1344 | pr_err("ipmr: rhtable insert error %d\n", ret); | |
1345 | ipmr_cache_free(c); | |
1346 | return ret; | |
1347 | } | |
1348 | list_add_tail_rcu(&c->list, &mrt->mfc_cache_list); | |
7ef8f65d NA |
1349 | /* Check to see if we resolved a queued list. If so we |
1350 | * need to send on the frames and tidy up. | |
1da177e4 | 1351 | */ |
b0ebb739 | 1352 | found = false; |
1da177e4 | 1353 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 1354 | list_for_each_entry(uc, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1355 | if (uc->mfc_origin == c->mfc_origin && |
1da177e4 | 1356 | uc->mfc_mcastgrp == c->mfc_mcastgrp) { |
862465f2 | 1357 | list_del(&uc->list); |
0c12295a | 1358 | atomic_dec(&mrt->cache_resolve_queue_len); |
b0ebb739 | 1359 | found = true; |
1da177e4 LT |
1360 | break; |
1361 | } | |
1362 | } | |
0c12295a PM |
1363 | if (list_empty(&mrt->mfc_unres_queue)) |
1364 | del_timer(&mrt->ipmr_expire_timer); | |
1da177e4 LT |
1365 | spin_unlock_bh(&mfc_unres_lock); |
1366 | ||
b0ebb739 | 1367 | if (found) { |
0c12295a | 1368 | ipmr_cache_resolve(net, mrt, uc, c); |
5c0a66f5 | 1369 | ipmr_cache_free(uc); |
1da177e4 | 1370 | } |
b362053a | 1371 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, c, mrt->id); |
8cd3ac9f | 1372 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1373 | return 0; |
1374 | } | |
1375 | ||
7ef8f65d | 1376 | /* Close the multicast socket, and clear the vif tables etc */ |
0e615e96 | 1377 | static void mroute_clean_tables(struct mr_table *mrt, bool all) |
1da177e4 | 1378 | { |
b362053a | 1379 | struct net *net = read_pnet(&mrt->net); |
8fb472c0 | 1380 | struct mfc_cache *c, *tmp; |
d17fa6fa | 1381 | LIST_HEAD(list); |
8fb472c0 | 1382 | int i; |
e905a9ed | 1383 | |
a8cb16dd | 1384 | /* Shut down all active vif entries */ |
0c12295a | 1385 | for (i = 0; i < mrt->maxvif; i++) { |
0e615e96 NA |
1386 | if (!all && (mrt->vif_table[i].flags & VIFF_STATIC)) |
1387 | continue; | |
1388 | vif_delete(mrt, i, 0, &list); | |
1da177e4 | 1389 | } |
d17fa6fa | 1390 | unregister_netdevice_many(&list); |
1da177e4 | 1391 | |
a8cb16dd | 1392 | /* Wipe the cache */ |
8fb472c0 NA |
1393 | list_for_each_entry_safe(c, tmp, &mrt->mfc_cache_list, list) { |
1394 | if (!all && (c->mfc_flags & MFC_STATIC)) | |
1395 | continue; | |
1396 | rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params); | |
1397 | list_del_rcu(&c->list); | |
b362053a YG |
1398 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c, |
1399 | mrt->id); | |
8fb472c0 | 1400 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
310ebbba | 1401 | ipmr_cache_put(c); |
1da177e4 LT |
1402 | } |
1403 | ||
0c12295a | 1404 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
1da177e4 | 1405 | spin_lock_bh(&mfc_unres_lock); |
8fb472c0 | 1406 | list_for_each_entry_safe(c, tmp, &mrt->mfc_unres_queue, list) { |
862465f2 | 1407 | list_del(&c->list); |
8cd3ac9f | 1408 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 1409 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
1410 | } |
1411 | spin_unlock_bh(&mfc_unres_lock); | |
1412 | } | |
1413 | } | |
1414 | ||
4c968709 ED |
1415 | /* called from ip_ra_control(), before an RCU grace period, |
1416 | * we dont need to call synchronize_rcu() here | |
1417 | */ | |
1da177e4 LT |
1418 | static void mrtsock_destruct(struct sock *sk) |
1419 | { | |
4feb88e5 | 1420 | struct net *net = sock_net(sk); |
f0ad0860 | 1421 | struct mr_table *mrt; |
4feb88e5 | 1422 | |
1215e51e | 1423 | ASSERT_RTNL(); |
f0ad0860 | 1424 | ipmr_for_each_table(mrt, net) { |
4c968709 | 1425 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
f0ad0860 | 1426 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)--; |
3b022865 DA |
1427 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1428 | NETCONFA_MC_FORWARDING, | |
d67b8c61 ND |
1429 | NETCONFA_IFINDEX_ALL, |
1430 | net->ipv4.devconf_all); | |
a9b3cd7f | 1431 | RCU_INIT_POINTER(mrt->mroute_sk, NULL); |
0e615e96 | 1432 | mroute_clean_tables(mrt, false); |
f0ad0860 | 1433 | } |
1da177e4 | 1434 | } |
1da177e4 LT |
1435 | } |
1436 | ||
7ef8f65d NA |
1437 | /* Socket options and virtual interface manipulation. The whole |
1438 | * virtual interface system is a complete heap, but unfortunately | |
1439 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1440 | * MOSPF/PIM router set up we can clean this up. | |
1da177e4 | 1441 | */ |
e905a9ed | 1442 | |
29e97d21 NA |
1443 | int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, |
1444 | unsigned int optlen) | |
1da177e4 | 1445 | { |
4feb88e5 | 1446 | struct net *net = sock_net(sk); |
29e97d21 | 1447 | int val, ret = 0, parent = 0; |
f0ad0860 | 1448 | struct mr_table *mrt; |
29e97d21 NA |
1449 | struct vifctl vif; |
1450 | struct mfcctl mfc; | |
1451 | u32 uval; | |
f0ad0860 | 1452 | |
29e97d21 NA |
1453 | /* There's one exception to the lock - MRT_DONE which needs to unlock */ |
1454 | rtnl_lock(); | |
5e1859fb | 1455 | if (sk->sk_type != SOCK_RAW || |
29e97d21 NA |
1456 | inet_sk(sk)->inet_num != IPPROTO_IGMP) { |
1457 | ret = -EOPNOTSUPP; | |
1458 | goto out_unlock; | |
1459 | } | |
5e1859fb | 1460 | |
f0ad0860 | 1461 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
29e97d21 NA |
1462 | if (!mrt) { |
1463 | ret = -ENOENT; | |
1464 | goto out_unlock; | |
1465 | } | |
132adf54 | 1466 | if (optname != MRT_INIT) { |
33d480ce | 1467 | if (sk != rcu_access_pointer(mrt->mroute_sk) && |
29e97d21 NA |
1468 | !ns_capable(net->user_ns, CAP_NET_ADMIN)) { |
1469 | ret = -EACCES; | |
1470 | goto out_unlock; | |
1471 | } | |
1da177e4 LT |
1472 | } |
1473 | ||
132adf54 SH |
1474 | switch (optname) { |
1475 | case MRT_INIT: | |
42e6b89c | 1476 | if (optlen != sizeof(int)) { |
29e97d21 | 1477 | ret = -EINVAL; |
42e6b89c NA |
1478 | break; |
1479 | } | |
1480 | if (rtnl_dereference(mrt->mroute_sk)) { | |
29e97d21 | 1481 | ret = -EADDRINUSE; |
29e97d21 | 1482 | break; |
42e6b89c | 1483 | } |
132adf54 SH |
1484 | |
1485 | ret = ip_ra_control(sk, 1, mrtsock_destruct); | |
1486 | if (ret == 0) { | |
cf778b00 | 1487 | rcu_assign_pointer(mrt->mroute_sk, sk); |
4feb88e5 | 1488 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)++; |
3b022865 DA |
1489 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1490 | NETCONFA_MC_FORWARDING, | |
d67b8c61 ND |
1491 | NETCONFA_IFINDEX_ALL, |
1492 | net->ipv4.devconf_all); | |
132adf54 | 1493 | } |
29e97d21 | 1494 | break; |
132adf54 | 1495 | case MRT_DONE: |
29e97d21 NA |
1496 | if (sk != rcu_access_pointer(mrt->mroute_sk)) { |
1497 | ret = -EACCES; | |
1498 | } else { | |
29e97d21 | 1499 | ret = ip_ra_control(sk, 0, NULL); |
1215e51e | 1500 | goto out_unlock; |
29e97d21 NA |
1501 | } |
1502 | break; | |
132adf54 SH |
1503 | case MRT_ADD_VIF: |
1504 | case MRT_DEL_VIF: | |
29e97d21 NA |
1505 | if (optlen != sizeof(vif)) { |
1506 | ret = -EINVAL; | |
1507 | break; | |
1508 | } | |
1509 | if (copy_from_user(&vif, optval, sizeof(vif))) { | |
1510 | ret = -EFAULT; | |
1511 | break; | |
1512 | } | |
1513 | if (vif.vifc_vifi >= MAXVIFS) { | |
1514 | ret = -ENFILE; | |
1515 | break; | |
1516 | } | |
c354e124 | 1517 | if (optname == MRT_ADD_VIF) { |
4c968709 ED |
1518 | ret = vif_add(net, mrt, &vif, |
1519 | sk == rtnl_dereference(mrt->mroute_sk)); | |
132adf54 | 1520 | } else { |
0c12295a | 1521 | ret = vif_delete(mrt, vif.vifc_vifi, 0, NULL); |
132adf54 | 1522 | } |
29e97d21 | 1523 | break; |
7ef8f65d NA |
1524 | /* Manipulate the forwarding caches. These live |
1525 | * in a sort of kernel/user symbiosis. | |
1526 | */ | |
132adf54 SH |
1527 | case MRT_ADD_MFC: |
1528 | case MRT_DEL_MFC: | |
660b26dc | 1529 | parent = -1; |
fcfd6dfa | 1530 | /* fall through */ |
660b26dc ND |
1531 | case MRT_ADD_MFC_PROXY: |
1532 | case MRT_DEL_MFC_PROXY: | |
29e97d21 NA |
1533 | if (optlen != sizeof(mfc)) { |
1534 | ret = -EINVAL; | |
1535 | break; | |
1536 | } | |
1537 | if (copy_from_user(&mfc, optval, sizeof(mfc))) { | |
1538 | ret = -EFAULT; | |
1539 | break; | |
1540 | } | |
660b26dc ND |
1541 | if (parent == 0) |
1542 | parent = mfc.mfcc_parent; | |
660b26dc ND |
1543 | if (optname == MRT_DEL_MFC || optname == MRT_DEL_MFC_PROXY) |
1544 | ret = ipmr_mfc_delete(mrt, &mfc, parent); | |
132adf54 | 1545 | else |
4c968709 | 1546 | ret = ipmr_mfc_add(net, mrt, &mfc, |
660b26dc ND |
1547 | sk == rtnl_dereference(mrt->mroute_sk), |
1548 | parent); | |
29e97d21 | 1549 | break; |
7ef8f65d | 1550 | /* Control PIM assert. */ |
132adf54 | 1551 | case MRT_ASSERT: |
29e97d21 NA |
1552 | if (optlen != sizeof(val)) { |
1553 | ret = -EINVAL; | |
1554 | break; | |
1555 | } | |
1556 | if (get_user(val, (int __user *)optval)) { | |
1557 | ret = -EFAULT; | |
1558 | break; | |
1559 | } | |
1560 | mrt->mroute_do_assert = val; | |
1561 | break; | |
132adf54 | 1562 | case MRT_PIM: |
1973a4ea | 1563 | if (!ipmr_pimsm_enabled()) { |
29e97d21 NA |
1564 | ret = -ENOPROTOOPT; |
1565 | break; | |
1566 | } | |
1567 | if (optlen != sizeof(val)) { | |
1568 | ret = -EINVAL; | |
1569 | break; | |
1570 | } | |
1571 | if (get_user(val, (int __user *)optval)) { | |
1572 | ret = -EFAULT; | |
1573 | break; | |
1574 | } | |
ba93ef74 | 1575 | |
29e97d21 NA |
1576 | val = !!val; |
1577 | if (val != mrt->mroute_do_pim) { | |
1578 | mrt->mroute_do_pim = val; | |
1579 | mrt->mroute_do_assert = val; | |
1da177e4 | 1580 | } |
29e97d21 | 1581 | break; |
f0ad0860 | 1582 | case MRT_TABLE: |
29e97d21 NA |
1583 | if (!IS_BUILTIN(CONFIG_IP_MROUTE_MULTIPLE_TABLES)) { |
1584 | ret = -ENOPROTOOPT; | |
1585 | break; | |
1586 | } | |
1587 | if (optlen != sizeof(uval)) { | |
1588 | ret = -EINVAL; | |
1589 | break; | |
1590 | } | |
1591 | if (get_user(uval, (u32 __user *)optval)) { | |
1592 | ret = -EFAULT; | |
1593 | break; | |
1594 | } | |
f0ad0860 | 1595 | |
4c968709 ED |
1596 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
1597 | ret = -EBUSY; | |
1598 | } else { | |
29e97d21 | 1599 | mrt = ipmr_new_table(net, uval); |
1113ebbc NA |
1600 | if (IS_ERR(mrt)) |
1601 | ret = PTR_ERR(mrt); | |
5e1859fb | 1602 | else |
29e97d21 | 1603 | raw_sk(sk)->ipmr_table = uval; |
4c968709 | 1604 | } |
29e97d21 | 1605 | break; |
7ef8f65d | 1606 | /* Spurious command, or MRT_VERSION which you cannot set. */ |
132adf54 | 1607 | default: |
29e97d21 | 1608 | ret = -ENOPROTOOPT; |
1da177e4 | 1609 | } |
29e97d21 NA |
1610 | out_unlock: |
1611 | rtnl_unlock(); | |
29e97d21 | 1612 | return ret; |
1da177e4 LT |
1613 | } |
1614 | ||
7ef8f65d | 1615 | /* Getsock opt support for the multicast routing system. */ |
c354e124 | 1616 | int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
1617 | { |
1618 | int olr; | |
1619 | int val; | |
4feb88e5 | 1620 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1621 | struct mr_table *mrt; |
1622 | ||
5e1859fb ED |
1623 | if (sk->sk_type != SOCK_RAW || |
1624 | inet_sk(sk)->inet_num != IPPROTO_IGMP) | |
1625 | return -EOPNOTSUPP; | |
1626 | ||
f0ad0860 | 1627 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
51456b29 | 1628 | if (!mrt) |
f0ad0860 | 1629 | return -ENOENT; |
1da177e4 | 1630 | |
fe9ef3ce NA |
1631 | switch (optname) { |
1632 | case MRT_VERSION: | |
1633 | val = 0x0305; | |
1634 | break; | |
1635 | case MRT_PIM: | |
1973a4ea | 1636 | if (!ipmr_pimsm_enabled()) |
fe9ef3ce NA |
1637 | return -ENOPROTOOPT; |
1638 | val = mrt->mroute_do_pim; | |
1639 | break; | |
1640 | case MRT_ASSERT: | |
1641 | val = mrt->mroute_do_assert; | |
1642 | break; | |
1643 | default: | |
1da177e4 | 1644 | return -ENOPROTOOPT; |
fe9ef3ce | 1645 | } |
1da177e4 LT |
1646 | |
1647 | if (get_user(olr, optlen)) | |
1648 | return -EFAULT; | |
1da177e4 LT |
1649 | olr = min_t(unsigned int, olr, sizeof(int)); |
1650 | if (olr < 0) | |
1651 | return -EINVAL; | |
c354e124 | 1652 | if (put_user(olr, optlen)) |
1da177e4 | 1653 | return -EFAULT; |
c354e124 | 1654 | if (copy_to_user(optval, &val, olr)) |
1da177e4 LT |
1655 | return -EFAULT; |
1656 | return 0; | |
1657 | } | |
1658 | ||
7ef8f65d | 1659 | /* The IP multicast ioctl support routines. */ |
1da177e4 LT |
1660 | int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) |
1661 | { | |
1662 | struct sioc_sg_req sr; | |
1663 | struct sioc_vif_req vr; | |
1664 | struct vif_device *vif; | |
1665 | struct mfc_cache *c; | |
4feb88e5 | 1666 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1667 | struct mr_table *mrt; |
1668 | ||
1669 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1670 | if (!mrt) |
f0ad0860 | 1671 | return -ENOENT; |
e905a9ed | 1672 | |
132adf54 SH |
1673 | switch (cmd) { |
1674 | case SIOCGETVIFCNT: | |
c354e124 | 1675 | if (copy_from_user(&vr, arg, sizeof(vr))) |
132adf54 | 1676 | return -EFAULT; |
0c12295a | 1677 | if (vr.vifi >= mrt->maxvif) |
132adf54 SH |
1678 | return -EINVAL; |
1679 | read_lock(&mrt_lock); | |
0c12295a PM |
1680 | vif = &mrt->vif_table[vr.vifi]; |
1681 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
c354e124 JK |
1682 | vr.icount = vif->pkt_in; |
1683 | vr.ocount = vif->pkt_out; | |
1684 | vr.ibytes = vif->bytes_in; | |
1685 | vr.obytes = vif->bytes_out; | |
1da177e4 | 1686 | read_unlock(&mrt_lock); |
1da177e4 | 1687 | |
c354e124 | 1688 | if (copy_to_user(arg, &vr, sizeof(vr))) |
132adf54 SH |
1689 | return -EFAULT; |
1690 | return 0; | |
1691 | } | |
1692 | read_unlock(&mrt_lock); | |
1693 | return -EADDRNOTAVAIL; | |
1694 | case SIOCGETSGCNT: | |
c354e124 | 1695 | if (copy_from_user(&sr, arg, sizeof(sr))) |
132adf54 SH |
1696 | return -EFAULT; |
1697 | ||
a8c9486b | 1698 | rcu_read_lock(); |
0c12295a | 1699 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); |
132adf54 SH |
1700 | if (c) { |
1701 | sr.pktcnt = c->mfc_un.res.pkt; | |
1702 | sr.bytecnt = c->mfc_un.res.bytes; | |
1703 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
a8c9486b | 1704 | rcu_read_unlock(); |
132adf54 | 1705 | |
c354e124 | 1706 | if (copy_to_user(arg, &sr, sizeof(sr))) |
132adf54 SH |
1707 | return -EFAULT; |
1708 | return 0; | |
1709 | } | |
a8c9486b | 1710 | rcu_read_unlock(); |
132adf54 SH |
1711 | return -EADDRNOTAVAIL; |
1712 | default: | |
1713 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1714 | } |
1715 | } | |
1716 | ||
709b46e8 EB |
1717 | #ifdef CONFIG_COMPAT |
1718 | struct compat_sioc_sg_req { | |
1719 | struct in_addr src; | |
1720 | struct in_addr grp; | |
1721 | compat_ulong_t pktcnt; | |
1722 | compat_ulong_t bytecnt; | |
1723 | compat_ulong_t wrong_if; | |
1724 | }; | |
1725 | ||
ca6b8bb0 DM |
1726 | struct compat_sioc_vif_req { |
1727 | vifi_t vifi; /* Which iface */ | |
1728 | compat_ulong_t icount; | |
1729 | compat_ulong_t ocount; | |
1730 | compat_ulong_t ibytes; | |
1731 | compat_ulong_t obytes; | |
1732 | }; | |
1733 | ||
709b46e8 EB |
1734 | int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
1735 | { | |
0033d5ad | 1736 | struct compat_sioc_sg_req sr; |
ca6b8bb0 DM |
1737 | struct compat_sioc_vif_req vr; |
1738 | struct vif_device *vif; | |
709b46e8 EB |
1739 | struct mfc_cache *c; |
1740 | struct net *net = sock_net(sk); | |
1741 | struct mr_table *mrt; | |
1742 | ||
1743 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1744 | if (!mrt) |
709b46e8 EB |
1745 | return -ENOENT; |
1746 | ||
1747 | switch (cmd) { | |
ca6b8bb0 DM |
1748 | case SIOCGETVIFCNT: |
1749 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1750 | return -EFAULT; | |
1751 | if (vr.vifi >= mrt->maxvif) | |
1752 | return -EINVAL; | |
1753 | read_lock(&mrt_lock); | |
1754 | vif = &mrt->vif_table[vr.vifi]; | |
1755 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
1756 | vr.icount = vif->pkt_in; | |
1757 | vr.ocount = vif->pkt_out; | |
1758 | vr.ibytes = vif->bytes_in; | |
1759 | vr.obytes = vif->bytes_out; | |
1760 | read_unlock(&mrt_lock); | |
1761 | ||
1762 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1763 | return -EFAULT; | |
1764 | return 0; | |
1765 | } | |
1766 | read_unlock(&mrt_lock); | |
1767 | return -EADDRNOTAVAIL; | |
709b46e8 EB |
1768 | case SIOCGETSGCNT: |
1769 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1770 | return -EFAULT; | |
1771 | ||
1772 | rcu_read_lock(); | |
1773 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); | |
1774 | if (c) { | |
1775 | sr.pktcnt = c->mfc_un.res.pkt; | |
1776 | sr.bytecnt = c->mfc_un.res.bytes; | |
1777 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1778 | rcu_read_unlock(); | |
1779 | ||
1780 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1781 | return -EFAULT; | |
1782 | return 0; | |
1783 | } | |
1784 | rcu_read_unlock(); | |
1785 | return -EADDRNOTAVAIL; | |
1786 | default: | |
1787 | return -ENOIOCTLCMD; | |
1788 | } | |
1789 | } | |
1790 | #endif | |
1791 | ||
1da177e4 LT |
1792 | static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
1793 | { | |
351638e7 | 1794 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4feb88e5 | 1795 | struct net *net = dev_net(dev); |
f0ad0860 | 1796 | struct mr_table *mrt; |
1da177e4 LT |
1797 | struct vif_device *v; |
1798 | int ct; | |
e9dc8653 | 1799 | |
1da177e4 LT |
1800 | if (event != NETDEV_UNREGISTER) |
1801 | return NOTIFY_DONE; | |
f0ad0860 PM |
1802 | |
1803 | ipmr_for_each_table(mrt, net) { | |
1804 | v = &mrt->vif_table[0]; | |
1805 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1806 | if (v->dev == dev) | |
e92036a6 | 1807 | vif_delete(mrt, ct, 1, NULL); |
f0ad0860 | 1808 | } |
1da177e4 LT |
1809 | } |
1810 | return NOTIFY_DONE; | |
1811 | } | |
1812 | ||
c354e124 | 1813 | static struct notifier_block ip_mr_notifier = { |
1da177e4 LT |
1814 | .notifier_call = ipmr_device_event, |
1815 | }; | |
1816 | ||
7ef8f65d NA |
1817 | /* Encapsulate a packet by attaching a valid IPIP header to it. |
1818 | * This avoids tunnel drivers and other mess and gives us the speed so | |
1819 | * important for multicast video. | |
1da177e4 | 1820 | */ |
b6a7719a HFS |
1821 | static void ip_encap(struct net *net, struct sk_buff *skb, |
1822 | __be32 saddr, __be32 daddr) | |
1da177e4 | 1823 | { |
8856dfa3 | 1824 | struct iphdr *iph; |
b71d1d42 | 1825 | const struct iphdr *old_iph = ip_hdr(skb); |
8856dfa3 ACM |
1826 | |
1827 | skb_push(skb, sizeof(struct iphdr)); | |
b0e380b1 | 1828 | skb->transport_header = skb->network_header; |
8856dfa3 | 1829 | skb_reset_network_header(skb); |
eddc9ec5 | 1830 | iph = ip_hdr(skb); |
1da177e4 | 1831 | |
a8cb16dd | 1832 | iph->version = 4; |
e023dd64 ACM |
1833 | iph->tos = old_iph->tos; |
1834 | iph->ttl = old_iph->ttl; | |
1da177e4 LT |
1835 | iph->frag_off = 0; |
1836 | iph->daddr = daddr; | |
1837 | iph->saddr = saddr; | |
1838 | iph->protocol = IPPROTO_IPIP; | |
1839 | iph->ihl = 5; | |
1840 | iph->tot_len = htons(skb->len); | |
b6a7719a | 1841 | ip_select_ident(net, skb, NULL); |
1da177e4 LT |
1842 | ip_send_check(iph); |
1843 | ||
1da177e4 LT |
1844 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
1845 | nf_reset(skb); | |
1846 | } | |
1847 | ||
0c4b51f0 EB |
1848 | static inline int ipmr_forward_finish(struct net *net, struct sock *sk, |
1849 | struct sk_buff *skb) | |
1da177e4 | 1850 | { |
a8cb16dd | 1851 | struct ip_options *opt = &(IPCB(skb)->opt); |
1da177e4 | 1852 | |
73186df8 DM |
1853 | IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS); |
1854 | IP_ADD_STATS(net, IPSTATS_MIB_OUTOCTETS, skb->len); | |
1da177e4 LT |
1855 | |
1856 | if (unlikely(opt->optlen)) | |
1857 | ip_forward_options(skb); | |
1858 | ||
13206b6b | 1859 | return dst_output(net, sk, skb); |
1da177e4 LT |
1860 | } |
1861 | ||
a5bc9294 YG |
1862 | #ifdef CONFIG_NET_SWITCHDEV |
1863 | static bool ipmr_forward_offloaded(struct sk_buff *skb, struct mr_table *mrt, | |
1864 | int in_vifi, int out_vifi) | |
1865 | { | |
1866 | struct vif_device *out_vif = &mrt->vif_table[out_vifi]; | |
1867 | struct vif_device *in_vif = &mrt->vif_table[in_vifi]; | |
1868 | ||
1869 | if (!skb->offload_mr_fwd_mark) | |
1870 | return false; | |
1871 | if (!out_vif->dev_parent_id.id_len || !in_vif->dev_parent_id.id_len) | |
1872 | return false; | |
1873 | return netdev_phys_item_id_same(&out_vif->dev_parent_id, | |
1874 | &in_vif->dev_parent_id); | |
1875 | } | |
1876 | #else | |
1877 | static bool ipmr_forward_offloaded(struct sk_buff *skb, struct mr_table *mrt, | |
1878 | int in_vifi, int out_vifi) | |
1879 | { | |
1880 | return false; | |
1881 | } | |
1882 | #endif | |
1883 | ||
7ef8f65d | 1884 | /* Processing handlers for ipmr_forward */ |
1da177e4 | 1885 | |
0c12295a | 1886 | static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt, |
a5bc9294 YG |
1887 | int in_vifi, struct sk_buff *skb, |
1888 | struct mfc_cache *c, int vifi) | |
1da177e4 | 1889 | { |
eddc9ec5 | 1890 | const struct iphdr *iph = ip_hdr(skb); |
0c12295a | 1891 | struct vif_device *vif = &mrt->vif_table[vifi]; |
1da177e4 LT |
1892 | struct net_device *dev; |
1893 | struct rtable *rt; | |
31e4543d | 1894 | struct flowi4 fl4; |
1da177e4 LT |
1895 | int encap = 0; |
1896 | ||
51456b29 | 1897 | if (!vif->dev) |
1da177e4 LT |
1898 | goto out_free; |
1899 | ||
1da177e4 LT |
1900 | if (vif->flags & VIFF_REGISTER) { |
1901 | vif->pkt_out++; | |
c354e124 | 1902 | vif->bytes_out += skb->len; |
cf3677ae PE |
1903 | vif->dev->stats.tx_bytes += skb->len; |
1904 | vif->dev->stats.tx_packets++; | |
0c12295a | 1905 | ipmr_cache_report(mrt, skb, vifi, IGMPMSG_WHOLEPKT); |
69ebbf58 | 1906 | goto out_free; |
1da177e4 | 1907 | } |
1da177e4 | 1908 | |
a5bc9294 YG |
1909 | if (ipmr_forward_offloaded(skb, mrt, in_vifi, vifi)) |
1910 | goto out_free; | |
1911 | ||
a8cb16dd | 1912 | if (vif->flags & VIFF_TUNNEL) { |
31e4543d | 1913 | rt = ip_route_output_ports(net, &fl4, NULL, |
78fbfd8a DM |
1914 | vif->remote, vif->local, |
1915 | 0, 0, | |
1916 | IPPROTO_IPIP, | |
1917 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1918 | if (IS_ERR(rt)) |
1da177e4 LT |
1919 | goto out_free; |
1920 | encap = sizeof(struct iphdr); | |
1921 | } else { | |
31e4543d | 1922 | rt = ip_route_output_ports(net, &fl4, NULL, iph->daddr, 0, |
78fbfd8a DM |
1923 | 0, 0, |
1924 | IPPROTO_IPIP, | |
1925 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1926 | if (IS_ERR(rt)) |
1da177e4 LT |
1927 | goto out_free; |
1928 | } | |
1929 | ||
d8d1f30b | 1930 | dev = rt->dst.dev; |
1da177e4 | 1931 | |
d8d1f30b | 1932 | if (skb->len+encap > dst_mtu(&rt->dst) && (ntohs(iph->frag_off) & IP_DF)) { |
1da177e4 | 1933 | /* Do not fragment multicasts. Alas, IPv4 does not |
a8cb16dd ED |
1934 | * allow to send ICMP, so that packets will disappear |
1935 | * to blackhole. | |
1da177e4 | 1936 | */ |
73186df8 | 1937 | IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS); |
1da177e4 LT |
1938 | ip_rt_put(rt); |
1939 | goto out_free; | |
1940 | } | |
1941 | ||
d8d1f30b | 1942 | encap += LL_RESERVED_SPACE(dev) + rt->dst.header_len; |
1da177e4 LT |
1943 | |
1944 | if (skb_cow(skb, encap)) { | |
e905a9ed | 1945 | ip_rt_put(rt); |
1da177e4 LT |
1946 | goto out_free; |
1947 | } | |
1948 | ||
1949 | vif->pkt_out++; | |
c354e124 | 1950 | vif->bytes_out += skb->len; |
1da177e4 | 1951 | |
adf30907 | 1952 | skb_dst_drop(skb); |
d8d1f30b | 1953 | skb_dst_set(skb, &rt->dst); |
eddc9ec5 | 1954 | ip_decrease_ttl(ip_hdr(skb)); |
1da177e4 LT |
1955 | |
1956 | /* FIXME: forward and output firewalls used to be called here. | |
a8cb16dd ED |
1957 | * What do we do with netfilter? -- RR |
1958 | */ | |
1da177e4 | 1959 | if (vif->flags & VIFF_TUNNEL) { |
b6a7719a | 1960 | ip_encap(net, skb, vif->local, vif->remote); |
1da177e4 | 1961 | /* FIXME: extra output firewall step used to be here. --RR */ |
2f4c02d4 PE |
1962 | vif->dev->stats.tx_packets++; |
1963 | vif->dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1964 | } |
1965 | ||
9ee6c5dc | 1966 | IPCB(skb)->flags |= IPSKB_FORWARDED; |
1da177e4 | 1967 | |
7ef8f65d | 1968 | /* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally |
1da177e4 LT |
1969 | * not only before forwarding, but after forwarding on all output |
1970 | * interfaces. It is clear, if mrouter runs a multicasting | |
1971 | * program, it should receive packets not depending to what interface | |
1972 | * program is joined. | |
1973 | * If we will not make it, the program will have to join on all | |
1974 | * interfaces. On the other hand, multihoming host (or router, but | |
1975 | * not mrouter) cannot join to more than one interface - it will | |
1976 | * result in receiving multiple packets. | |
1977 | */ | |
29a26a56 EB |
1978 | NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, |
1979 | net, NULL, skb, skb->dev, dev, | |
1da177e4 LT |
1980 | ipmr_forward_finish); |
1981 | return; | |
1982 | ||
1983 | out_free: | |
1984 | kfree_skb(skb); | |
1da177e4 LT |
1985 | } |
1986 | ||
0c12295a | 1987 | static int ipmr_find_vif(struct mr_table *mrt, struct net_device *dev) |
1da177e4 LT |
1988 | { |
1989 | int ct; | |
0c12295a PM |
1990 | |
1991 | for (ct = mrt->maxvif-1; ct >= 0; ct--) { | |
1992 | if (mrt->vif_table[ct].dev == dev) | |
1da177e4 LT |
1993 | break; |
1994 | } | |
1995 | return ct; | |
1996 | } | |
1997 | ||
1998 | /* "local" means that we should preserve one skb (for local delivery) */ | |
c4854ec8 | 1999 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
4b1f0d33 DS |
2000 | struct net_device *dev, struct sk_buff *skb, |
2001 | struct mfc_cache *cache, int local) | |
1da177e4 | 2002 | { |
4b1f0d33 | 2003 | int true_vifi = ipmr_find_vif(mrt, dev); |
1da177e4 LT |
2004 | int psend = -1; |
2005 | int vif, ct; | |
2006 | ||
2007 | vif = cache->mfc_parent; | |
2008 | cache->mfc_un.res.pkt++; | |
2009 | cache->mfc_un.res.bytes += skb->len; | |
43b9e127 | 2010 | cache->mfc_un.res.lastuse = jiffies; |
1da177e4 | 2011 | |
360eb5da | 2012 | if (cache->mfc_origin == htonl(INADDR_ANY) && true_vifi >= 0) { |
660b26dc ND |
2013 | struct mfc_cache *cache_proxy; |
2014 | ||
2015 | /* For an (*,G) entry, we only check that the incomming | |
2016 | * interface is part of the static tree. | |
2017 | */ | |
2018 | cache_proxy = ipmr_cache_find_any_parent(mrt, vif); | |
2019 | if (cache_proxy && | |
2020 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2021 | goto forward; | |
2022 | } | |
2023 | ||
7ef8f65d | 2024 | /* Wrong interface: drop packet and (maybe) send PIM assert. */ |
4b1f0d33 | 2025 | if (mrt->vif_table[vif].dev != dev) { |
c7537967 | 2026 | if (rt_is_output_route(skb_rtable(skb))) { |
1da177e4 | 2027 | /* It is our own packet, looped back. |
a8cb16dd ED |
2028 | * Very complicated situation... |
2029 | * | |
2030 | * The best workaround until routing daemons will be | |
2031 | * fixed is not to redistribute packet, if it was | |
2032 | * send through wrong interface. It means, that | |
2033 | * multicast applications WILL NOT work for | |
2034 | * (S,G), which have default multicast route pointing | |
2035 | * to wrong oif. In any case, it is not a good | |
2036 | * idea to use multicasting applications on router. | |
1da177e4 LT |
2037 | */ |
2038 | goto dont_forward; | |
2039 | } | |
2040 | ||
2041 | cache->mfc_un.res.wrong_if++; | |
1da177e4 | 2042 | |
0c12295a | 2043 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
1da177e4 | 2044 | /* pimsm uses asserts, when switching from RPT to SPT, |
a8cb16dd ED |
2045 | * so that we cannot check that packet arrived on an oif. |
2046 | * It is bad, but otherwise we would need to move pretty | |
2047 | * large chunk of pimd to kernel. Ough... --ANK | |
1da177e4 | 2048 | */ |
0c12295a | 2049 | (mrt->mroute_do_pim || |
6f9374a9 | 2050 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
e905a9ed | 2051 | time_after(jiffies, |
1da177e4 LT |
2052 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { |
2053 | cache->mfc_un.res.last_assert = jiffies; | |
0c12295a | 2054 | ipmr_cache_report(mrt, skb, true_vifi, IGMPMSG_WRONGVIF); |
1da177e4 LT |
2055 | } |
2056 | goto dont_forward; | |
2057 | } | |
2058 | ||
660b26dc | 2059 | forward: |
0c12295a PM |
2060 | mrt->vif_table[vif].pkt_in++; |
2061 | mrt->vif_table[vif].bytes_in += skb->len; | |
1da177e4 | 2062 | |
7ef8f65d | 2063 | /* Forward the frame */ |
360eb5da ND |
2064 | if (cache->mfc_origin == htonl(INADDR_ANY) && |
2065 | cache->mfc_mcastgrp == htonl(INADDR_ANY)) { | |
660b26dc ND |
2066 | if (true_vifi >= 0 && |
2067 | true_vifi != cache->mfc_parent && | |
2068 | ip_hdr(skb)->ttl > | |
2069 | cache->mfc_un.res.ttls[cache->mfc_parent]) { | |
2070 | /* It's an (*,*) entry and the packet is not coming from | |
2071 | * the upstream: forward the packet to the upstream | |
2072 | * only. | |
2073 | */ | |
2074 | psend = cache->mfc_parent; | |
2075 | goto last_forward; | |
2076 | } | |
2077 | goto dont_forward; | |
2078 | } | |
a8cb16dd ED |
2079 | for (ct = cache->mfc_un.res.maxvif - 1; |
2080 | ct >= cache->mfc_un.res.minvif; ct--) { | |
660b26dc | 2081 | /* For (*,G) entry, don't forward to the incoming interface */ |
360eb5da ND |
2082 | if ((cache->mfc_origin != htonl(INADDR_ANY) || |
2083 | ct != true_vifi) && | |
660b26dc | 2084 | ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { |
1da177e4 LT |
2085 | if (psend != -1) { |
2086 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 2087 | |
1da177e4 | 2088 | if (skb2) |
a5bc9294 YG |
2089 | ipmr_queue_xmit(net, mrt, true_vifi, |
2090 | skb2, cache, psend); | |
1da177e4 | 2091 | } |
c354e124 | 2092 | psend = ct; |
1da177e4 LT |
2093 | } |
2094 | } | |
660b26dc | 2095 | last_forward: |
1da177e4 LT |
2096 | if (psend != -1) { |
2097 | if (local) { | |
2098 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 2099 | |
1da177e4 | 2100 | if (skb2) |
a5bc9294 YG |
2101 | ipmr_queue_xmit(net, mrt, true_vifi, skb2, |
2102 | cache, psend); | |
1da177e4 | 2103 | } else { |
a5bc9294 | 2104 | ipmr_queue_xmit(net, mrt, true_vifi, skb, cache, psend); |
c4854ec8 | 2105 | return; |
1da177e4 LT |
2106 | } |
2107 | } | |
2108 | ||
2109 | dont_forward: | |
2110 | if (!local) | |
2111 | kfree_skb(skb); | |
1da177e4 LT |
2112 | } |
2113 | ||
417da66f | 2114 | static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb) |
ee3f1aaf | 2115 | { |
417da66f DM |
2116 | struct rtable *rt = skb_rtable(skb); |
2117 | struct iphdr *iph = ip_hdr(skb); | |
da91981b | 2118 | struct flowi4 fl4 = { |
417da66f DM |
2119 | .daddr = iph->daddr, |
2120 | .saddr = iph->saddr, | |
b0fe4a31 | 2121 | .flowi4_tos = RT_TOS(iph->tos), |
4fd551d7 DM |
2122 | .flowi4_oif = (rt_is_output_route(rt) ? |
2123 | skb->dev->ifindex : 0), | |
2124 | .flowi4_iif = (rt_is_output_route(rt) ? | |
1fb9489b | 2125 | LOOPBACK_IFINDEX : |
4fd551d7 | 2126 | skb->dev->ifindex), |
b4869889 | 2127 | .flowi4_mark = skb->mark, |
ee3f1aaf DM |
2128 | }; |
2129 | struct mr_table *mrt; | |
2130 | int err; | |
2131 | ||
da91981b | 2132 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
ee3f1aaf DM |
2133 | if (err) |
2134 | return ERR_PTR(err); | |
2135 | return mrt; | |
2136 | } | |
1da177e4 | 2137 | |
7ef8f65d NA |
2138 | /* Multicast packets for forwarding arrive here |
2139 | * Called with rcu_read_lock(); | |
1da177e4 | 2140 | */ |
1da177e4 LT |
2141 | int ip_mr_input(struct sk_buff *skb) |
2142 | { | |
2143 | struct mfc_cache *cache; | |
4feb88e5 | 2144 | struct net *net = dev_net(skb->dev); |
511c3f92 | 2145 | int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL; |
f0ad0860 | 2146 | struct mr_table *mrt; |
bcfc7d33 TW |
2147 | struct net_device *dev; |
2148 | ||
2149 | /* skb->dev passed in is the loX master dev for vrfs. | |
2150 | * As there are no vifs associated with loopback devices, | |
2151 | * get the proper interface that does have a vif associated with it. | |
2152 | */ | |
2153 | dev = skb->dev; | |
2154 | if (netif_is_l3_master(skb->dev)) { | |
2155 | dev = dev_get_by_index_rcu(net, IPCB(skb)->iif); | |
2156 | if (!dev) { | |
2157 | kfree_skb(skb); | |
2158 | return -ENODEV; | |
2159 | } | |
2160 | } | |
1da177e4 LT |
2161 | |
2162 | /* Packet is looped back after forward, it should not be | |
a8cb16dd | 2163 | * forwarded second time, but still can be delivered locally. |
1da177e4 | 2164 | */ |
4c968709 | 2165 | if (IPCB(skb)->flags & IPSKB_FORWARDED) |
1da177e4 LT |
2166 | goto dont_forward; |
2167 | ||
417da66f | 2168 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2169 | if (IS_ERR(mrt)) { |
2170 | kfree_skb(skb); | |
2171 | return PTR_ERR(mrt); | |
e40dbc51 | 2172 | } |
1da177e4 | 2173 | if (!local) { |
4c968709 ED |
2174 | if (IPCB(skb)->opt.router_alert) { |
2175 | if (ip_call_ra_chain(skb)) | |
2176 | return 0; | |
2177 | } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP) { | |
2178 | /* IGMPv1 (and broken IGMPv2 implementations sort of | |
2179 | * Cisco IOS <= 11.2(8)) do not put router alert | |
2180 | * option to IGMP packets destined to routable | |
2181 | * groups. It is very bad, because it means | |
2182 | * that we can forward NO IGMP messages. | |
2183 | */ | |
2184 | struct sock *mroute_sk; | |
2185 | ||
2186 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
2187 | if (mroute_sk) { | |
2188 | nf_reset(skb); | |
2189 | raw_rcv(mroute_sk, skb); | |
2190 | return 0; | |
2191 | } | |
1da177e4 LT |
2192 | } |
2193 | } | |
2194 | ||
a8c9486b | 2195 | /* already under rcu_read_lock() */ |
0c12295a | 2196 | cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); |
51456b29 | 2197 | if (!cache) { |
bcfc7d33 | 2198 | int vif = ipmr_find_vif(mrt, dev); |
660b26dc ND |
2199 | |
2200 | if (vif >= 0) | |
2201 | cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr, | |
2202 | vif); | |
2203 | } | |
1da177e4 | 2204 | |
7ef8f65d | 2205 | /* No usable cache entry */ |
51456b29 | 2206 | if (!cache) { |
1da177e4 LT |
2207 | int vif; |
2208 | ||
2209 | if (local) { | |
2210 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2211 | ip_local_deliver(skb); | |
51456b29 | 2212 | if (!skb2) |
1da177e4 | 2213 | return -ENOBUFS; |
1da177e4 LT |
2214 | skb = skb2; |
2215 | } | |
2216 | ||
a8c9486b | 2217 | read_lock(&mrt_lock); |
bcfc7d33 | 2218 | vif = ipmr_find_vif(mrt, dev); |
1da177e4 | 2219 | if (vif >= 0) { |
4b1f0d33 | 2220 | int err2 = ipmr_cache_unresolved(mrt, vif, skb, dev); |
1da177e4 LT |
2221 | read_unlock(&mrt_lock); |
2222 | ||
0eae88f3 | 2223 | return err2; |
1da177e4 LT |
2224 | } |
2225 | read_unlock(&mrt_lock); | |
2226 | kfree_skb(skb); | |
2227 | return -ENODEV; | |
2228 | } | |
2229 | ||
a8c9486b | 2230 | read_lock(&mrt_lock); |
4b1f0d33 | 2231 | ip_mr_forward(net, mrt, dev, skb, cache, local); |
1da177e4 LT |
2232 | read_unlock(&mrt_lock); |
2233 | ||
2234 | if (local) | |
2235 | return ip_local_deliver(skb); | |
2236 | ||
2237 | return 0; | |
2238 | ||
2239 | dont_forward: | |
2240 | if (local) | |
2241 | return ip_local_deliver(skb); | |
2242 | kfree_skb(skb); | |
2243 | return 0; | |
2244 | } | |
2245 | ||
b1879204 | 2246 | #ifdef CONFIG_IP_PIMSM_V1 |
7ef8f65d | 2247 | /* Handle IGMP messages of PIMv1 */ |
a8cb16dd | 2248 | int pim_rcv_v1(struct sk_buff *skb) |
b1879204 IJ |
2249 | { |
2250 | struct igmphdr *pim; | |
4feb88e5 | 2251 | struct net *net = dev_net(skb->dev); |
f0ad0860 | 2252 | struct mr_table *mrt; |
b1879204 IJ |
2253 | |
2254 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) | |
2255 | goto drop; | |
2256 | ||
2257 | pim = igmp_hdr(skb); | |
2258 | ||
417da66f | 2259 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2260 | if (IS_ERR(mrt)) |
2261 | goto drop; | |
0c12295a | 2262 | if (!mrt->mroute_do_pim || |
b1879204 IJ |
2263 | pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) |
2264 | goto drop; | |
2265 | ||
f0ad0860 | 2266 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2267 | drop: |
2268 | kfree_skb(skb); | |
2269 | } | |
1da177e4 LT |
2270 | return 0; |
2271 | } | |
2272 | #endif | |
2273 | ||
2274 | #ifdef CONFIG_IP_PIMSM_V2 | |
a8cb16dd | 2275 | static int pim_rcv(struct sk_buff *skb) |
1da177e4 LT |
2276 | { |
2277 | struct pimreghdr *pim; | |
f0ad0860 PM |
2278 | struct net *net = dev_net(skb->dev); |
2279 | struct mr_table *mrt; | |
1da177e4 | 2280 | |
b1879204 | 2281 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) |
1da177e4 LT |
2282 | goto drop; |
2283 | ||
9c70220b | 2284 | pim = (struct pimreghdr *)skb_transport_header(skb); |
56245cae | 2285 | if (pim->type != ((PIM_VERSION << 4) | (PIM_TYPE_REGISTER)) || |
a8cb16dd | 2286 | (pim->flags & PIM_NULL_REGISTER) || |
e905a9ed | 2287 | (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && |
d3bc23e7 | 2288 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
1da177e4 LT |
2289 | goto drop; |
2290 | ||
417da66f | 2291 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2292 | if (IS_ERR(mrt)) |
2293 | goto drop; | |
f0ad0860 | 2294 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2295 | drop: |
2296 | kfree_skb(skb); | |
2297 | } | |
1da177e4 LT |
2298 | return 0; |
2299 | } | |
2300 | #endif | |
2301 | ||
cb6a4e46 PM |
2302 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
2303 | struct mfc_cache *c, struct rtmsg *rtm) | |
1da177e4 | 2304 | { |
adfa85e4 | 2305 | struct rta_mfc_stats mfcs; |
43b9e127 NA |
2306 | struct nlattr *mp_attr; |
2307 | struct rtnexthop *nhp; | |
b5036cd4 | 2308 | unsigned long lastuse; |
43b9e127 | 2309 | int ct; |
1da177e4 | 2310 | |
7438189b | 2311 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
1708ebc9 NA |
2312 | if (c->mfc_parent >= MAXVIFS) { |
2313 | rtm->rtm_flags |= RTNH_F_UNRESOLVED; | |
7438189b | 2314 | return -ENOENT; |
1708ebc9 | 2315 | } |
7438189b | 2316 | |
92a395e5 TG |
2317 | if (VIF_EXISTS(mrt, c->mfc_parent) && |
2318 | nla_put_u32(skb, RTA_IIF, mrt->vif_table[c->mfc_parent].dev->ifindex) < 0) | |
2319 | return -EMSGSIZE; | |
1da177e4 | 2320 | |
c7c0bbea YG |
2321 | if (c->mfc_flags & MFC_OFFLOAD) |
2322 | rtm->rtm_flags |= RTNH_F_OFFLOAD; | |
2323 | ||
92a395e5 TG |
2324 | if (!(mp_attr = nla_nest_start(skb, RTA_MULTIPATH))) |
2325 | return -EMSGSIZE; | |
1da177e4 LT |
2326 | |
2327 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
0c12295a | 2328 | if (VIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
92a395e5 TG |
2329 | if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp)))) { |
2330 | nla_nest_cancel(skb, mp_attr); | |
2331 | return -EMSGSIZE; | |
2332 | } | |
2333 | ||
1da177e4 LT |
2334 | nhp->rtnh_flags = 0; |
2335 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
0c12295a | 2336 | nhp->rtnh_ifindex = mrt->vif_table[ct].dev->ifindex; |
1da177e4 LT |
2337 | nhp->rtnh_len = sizeof(*nhp); |
2338 | } | |
2339 | } | |
92a395e5 TG |
2340 | |
2341 | nla_nest_end(skb, mp_attr); | |
2342 | ||
b5036cd4 NA |
2343 | lastuse = READ_ONCE(c->mfc_un.res.lastuse); |
2344 | lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0; | |
2345 | ||
adfa85e4 ND |
2346 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2347 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2348 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
43b9e127 | 2349 | if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) || |
b5036cd4 | 2350 | nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse), |
43b9e127 | 2351 | RTA_PAD)) |
adfa85e4 ND |
2352 | return -EMSGSIZE; |
2353 | ||
1da177e4 LT |
2354 | rtm->rtm_type = RTN_MULTICAST; |
2355 | return 1; | |
1da177e4 LT |
2356 | } |
2357 | ||
9a1b9496 DM |
2358 | int ipmr_get_route(struct net *net, struct sk_buff *skb, |
2359 | __be32 saddr, __be32 daddr, | |
9f09eaea | 2360 | struct rtmsg *rtm, u32 portid) |
1da177e4 | 2361 | { |
1da177e4 | 2362 | struct mfc_cache *cache; |
9a1b9496 DM |
2363 | struct mr_table *mrt; |
2364 | int err; | |
1da177e4 | 2365 | |
f0ad0860 | 2366 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 2367 | if (!mrt) |
f0ad0860 PM |
2368 | return -ENOENT; |
2369 | ||
a8c9486b | 2370 | rcu_read_lock(); |
9a1b9496 | 2371 | cache = ipmr_cache_find(mrt, saddr, daddr); |
51456b29 | 2372 | if (!cache && skb->dev) { |
660b26dc | 2373 | int vif = ipmr_find_vif(mrt, skb->dev); |
1da177e4 | 2374 | |
660b26dc ND |
2375 | if (vif >= 0) |
2376 | cache = ipmr_cache_find_any(mrt, daddr, vif); | |
2377 | } | |
51456b29 | 2378 | if (!cache) { |
72287490 | 2379 | struct sk_buff *skb2; |
eddc9ec5 | 2380 | struct iphdr *iph; |
1da177e4 | 2381 | struct net_device *dev; |
a8cb16dd | 2382 | int vif = -1; |
1da177e4 | 2383 | |
1da177e4 | 2384 | dev = skb->dev; |
a8c9486b | 2385 | read_lock(&mrt_lock); |
a8cb16dd ED |
2386 | if (dev) |
2387 | vif = ipmr_find_vif(mrt, dev); | |
2388 | if (vif < 0) { | |
1da177e4 | 2389 | read_unlock(&mrt_lock); |
a8c9486b | 2390 | rcu_read_unlock(); |
1da177e4 LT |
2391 | return -ENODEV; |
2392 | } | |
72287490 AK |
2393 | skb2 = skb_clone(skb, GFP_ATOMIC); |
2394 | if (!skb2) { | |
2395 | read_unlock(&mrt_lock); | |
a8c9486b | 2396 | rcu_read_unlock(); |
72287490 AK |
2397 | return -ENOMEM; |
2398 | } | |
2399 | ||
2cf75070 | 2400 | NETLINK_CB(skb2).portid = portid; |
e2d1bca7 ACM |
2401 | skb_push(skb2, sizeof(struct iphdr)); |
2402 | skb_reset_network_header(skb2); | |
eddc9ec5 ACM |
2403 | iph = ip_hdr(skb2); |
2404 | iph->ihl = sizeof(struct iphdr) >> 2; | |
9a1b9496 DM |
2405 | iph->saddr = saddr; |
2406 | iph->daddr = daddr; | |
eddc9ec5 | 2407 | iph->version = 0; |
4b1f0d33 | 2408 | err = ipmr_cache_unresolved(mrt, vif, skb2, dev); |
1da177e4 | 2409 | read_unlock(&mrt_lock); |
a8c9486b | 2410 | rcu_read_unlock(); |
1da177e4 LT |
2411 | return err; |
2412 | } | |
2413 | ||
a8c9486b | 2414 | read_lock(&mrt_lock); |
cb6a4e46 | 2415 | err = __ipmr_fill_mroute(mrt, skb, cache, rtm); |
1da177e4 | 2416 | read_unlock(&mrt_lock); |
a8c9486b | 2417 | rcu_read_unlock(); |
1da177e4 LT |
2418 | return err; |
2419 | } | |
2420 | ||
cb6a4e46 | 2421 | static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
65886f43 ND |
2422 | u32 portid, u32 seq, struct mfc_cache *c, int cmd, |
2423 | int flags) | |
cb6a4e46 PM |
2424 | { |
2425 | struct nlmsghdr *nlh; | |
2426 | struct rtmsg *rtm; | |
1eb99af5 | 2427 | int err; |
cb6a4e46 | 2428 | |
65886f43 | 2429 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
51456b29 | 2430 | if (!nlh) |
cb6a4e46 PM |
2431 | return -EMSGSIZE; |
2432 | ||
2433 | rtm = nlmsg_data(nlh); | |
2434 | rtm->rtm_family = RTNL_FAMILY_IPMR; | |
2435 | rtm->rtm_dst_len = 32; | |
2436 | rtm->rtm_src_len = 32; | |
2437 | rtm->rtm_tos = 0; | |
2438 | rtm->rtm_table = mrt->id; | |
f3756b79 DM |
2439 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2440 | goto nla_put_failure; | |
cb6a4e46 PM |
2441 | rtm->rtm_type = RTN_MULTICAST; |
2442 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; | |
9a68ac72 ND |
2443 | if (c->mfc_flags & MFC_STATIC) |
2444 | rtm->rtm_protocol = RTPROT_STATIC; | |
2445 | else | |
2446 | rtm->rtm_protocol = RTPROT_MROUTED; | |
cb6a4e46 PM |
2447 | rtm->rtm_flags = 0; |
2448 | ||
930345ea JB |
2449 | if (nla_put_in_addr(skb, RTA_SRC, c->mfc_origin) || |
2450 | nla_put_in_addr(skb, RTA_DST, c->mfc_mcastgrp)) | |
f3756b79 | 2451 | goto nla_put_failure; |
1eb99af5 ND |
2452 | err = __ipmr_fill_mroute(mrt, skb, c, rtm); |
2453 | /* do not break the dump if cache is unresolved */ | |
2454 | if (err < 0 && err != -ENOENT) | |
cb6a4e46 PM |
2455 | goto nla_put_failure; |
2456 | ||
053c095a JB |
2457 | nlmsg_end(skb, nlh); |
2458 | return 0; | |
cb6a4e46 PM |
2459 | |
2460 | nla_put_failure: | |
2461 | nlmsg_cancel(skb, nlh); | |
2462 | return -EMSGSIZE; | |
2463 | } | |
2464 | ||
8cd3ac9f ND |
2465 | static size_t mroute_msgsize(bool unresolved, int maxvif) |
2466 | { | |
2467 | size_t len = | |
2468 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2469 | + nla_total_size(4) /* RTA_TABLE */ | |
2470 | + nla_total_size(4) /* RTA_SRC */ | |
2471 | + nla_total_size(4) /* RTA_DST */ | |
2472 | ; | |
2473 | ||
2474 | if (!unresolved) | |
2475 | len = len | |
2476 | + nla_total_size(4) /* RTA_IIF */ | |
2477 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2478 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2479 | /* RTA_MFC_STATS */ | |
a9a08042 | 2480 | + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) |
8cd3ac9f ND |
2481 | ; |
2482 | ||
2483 | return len; | |
2484 | } | |
2485 | ||
2486 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, | |
2487 | int cmd) | |
2488 | { | |
2489 | struct net *net = read_pnet(&mrt->net); | |
2490 | struct sk_buff *skb; | |
2491 | int err = -ENOBUFS; | |
2492 | ||
2493 | skb = nlmsg_new(mroute_msgsize(mfc->mfc_parent >= MAXVIFS, mrt->maxvif), | |
2494 | GFP_ATOMIC); | |
51456b29 | 2495 | if (!skb) |
8cd3ac9f ND |
2496 | goto errout; |
2497 | ||
65886f43 | 2498 | err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
8cd3ac9f ND |
2499 | if (err < 0) |
2500 | goto errout; | |
2501 | ||
2502 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE, NULL, GFP_ATOMIC); | |
2503 | return; | |
2504 | ||
2505 | errout: | |
2506 | kfree_skb(skb); | |
2507 | if (err < 0) | |
2508 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE, err); | |
2509 | } | |
2510 | ||
5a645dd8 JG |
2511 | static size_t igmpmsg_netlink_msgsize(size_t payloadlen) |
2512 | { | |
2513 | size_t len = | |
2514 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) | |
2515 | + nla_total_size(1) /* IPMRA_CREPORT_MSGTYPE */ | |
2516 | + nla_total_size(4) /* IPMRA_CREPORT_VIF_ID */ | |
2517 | + nla_total_size(4) /* IPMRA_CREPORT_SRC_ADDR */ | |
2518 | + nla_total_size(4) /* IPMRA_CREPORT_DST_ADDR */ | |
2519 | /* IPMRA_CREPORT_PKT */ | |
2520 | + nla_total_size(payloadlen) | |
2521 | ; | |
2522 | ||
2523 | return len; | |
2524 | } | |
2525 | ||
2526 | static void igmpmsg_netlink_event(struct mr_table *mrt, struct sk_buff *pkt) | |
2527 | { | |
2528 | struct net *net = read_pnet(&mrt->net); | |
2529 | struct nlmsghdr *nlh; | |
2530 | struct rtgenmsg *rtgenm; | |
2531 | struct igmpmsg *msg; | |
2532 | struct sk_buff *skb; | |
2533 | struct nlattr *nla; | |
2534 | int payloadlen; | |
2535 | ||
2536 | payloadlen = pkt->len - sizeof(struct igmpmsg); | |
2537 | msg = (struct igmpmsg *)skb_network_header(pkt); | |
2538 | ||
2539 | skb = nlmsg_new(igmpmsg_netlink_msgsize(payloadlen), GFP_ATOMIC); | |
2540 | if (!skb) | |
2541 | goto errout; | |
2542 | ||
2543 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWCACHEREPORT, | |
2544 | sizeof(struct rtgenmsg), 0); | |
2545 | if (!nlh) | |
2546 | goto errout; | |
2547 | rtgenm = nlmsg_data(nlh); | |
2548 | rtgenm->rtgen_family = RTNL_FAMILY_IPMR; | |
2549 | if (nla_put_u8(skb, IPMRA_CREPORT_MSGTYPE, msg->im_msgtype) || | |
2550 | nla_put_u32(skb, IPMRA_CREPORT_VIF_ID, msg->im_vif) || | |
2551 | nla_put_in_addr(skb, IPMRA_CREPORT_SRC_ADDR, | |
2552 | msg->im_src.s_addr) || | |
2553 | nla_put_in_addr(skb, IPMRA_CREPORT_DST_ADDR, | |
2554 | msg->im_dst.s_addr)) | |
2555 | goto nla_put_failure; | |
2556 | ||
2557 | nla = nla_reserve(skb, IPMRA_CREPORT_PKT, payloadlen); | |
2558 | if (!nla || skb_copy_bits(pkt, sizeof(struct igmpmsg), | |
2559 | nla_data(nla), payloadlen)) | |
2560 | goto nla_put_failure; | |
2561 | ||
2562 | nlmsg_end(skb, nlh); | |
2563 | ||
2564 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE_R, NULL, GFP_ATOMIC); | |
2565 | return; | |
2566 | ||
2567 | nla_put_failure: | |
2568 | nlmsg_cancel(skb, nlh); | |
2569 | errout: | |
2570 | kfree_skb(skb); | |
2571 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE_R, -ENOBUFS); | |
2572 | } | |
2573 | ||
4f75ba69 DS |
2574 | static int ipmr_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
2575 | struct netlink_ext_ack *extack) | |
2576 | { | |
2577 | struct net *net = sock_net(in_skb->sk); | |
2578 | struct nlattr *tb[RTA_MAX + 1]; | |
2579 | struct sk_buff *skb = NULL; | |
2580 | struct mfc_cache *cache; | |
2581 | struct mr_table *mrt; | |
2582 | struct rtmsg *rtm; | |
2583 | __be32 src, grp; | |
2584 | u32 tableid; | |
2585 | int err; | |
2586 | ||
2587 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, | |
2588 | rtm_ipv4_policy, extack); | |
2589 | if (err < 0) | |
2590 | goto errout; | |
2591 | ||
2592 | rtm = nlmsg_data(nlh); | |
2593 | ||
2594 | src = tb[RTA_SRC] ? nla_get_in_addr(tb[RTA_SRC]) : 0; | |
2595 | grp = tb[RTA_DST] ? nla_get_in_addr(tb[RTA_DST]) : 0; | |
2596 | tableid = tb[RTA_TABLE] ? nla_get_u32(tb[RTA_TABLE]) : 0; | |
2597 | ||
2598 | mrt = ipmr_get_table(net, tableid ? tableid : RT_TABLE_DEFAULT); | |
2e3d232e DC |
2599 | if (!mrt) { |
2600 | err = -ENOENT; | |
4f75ba69 DS |
2601 | goto errout_free; |
2602 | } | |
2603 | ||
2604 | /* entries are added/deleted only under RTNL */ | |
2605 | rcu_read_lock(); | |
2606 | cache = ipmr_cache_find(mrt, src, grp); | |
2607 | rcu_read_unlock(); | |
2608 | if (!cache) { | |
2609 | err = -ENOENT; | |
2610 | goto errout_free; | |
2611 | } | |
2612 | ||
2613 | skb = nlmsg_new(mroute_msgsize(false, mrt->maxvif), GFP_KERNEL); | |
2614 | if (!skb) { | |
2615 | err = -ENOBUFS; | |
2616 | goto errout_free; | |
2617 | } | |
2618 | ||
2619 | err = ipmr_fill_mroute(mrt, skb, NETLINK_CB(in_skb).portid, | |
2620 | nlh->nlmsg_seq, cache, | |
2621 | RTM_NEWROUTE, 0); | |
2622 | if (err < 0) | |
2623 | goto errout_free; | |
2624 | ||
2625 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
2626 | ||
2627 | errout: | |
2628 | return err; | |
2629 | ||
2630 | errout_free: | |
2631 | kfree_skb(skb); | |
2632 | goto errout; | |
2633 | } | |
2634 | ||
cb6a4e46 PM |
2635 | static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2636 | { | |
2637 | struct net *net = sock_net(skb->sk); | |
2638 | struct mr_table *mrt; | |
2639 | struct mfc_cache *mfc; | |
2640 | unsigned int t = 0, s_t; | |
cb6a4e46 PM |
2641 | unsigned int e = 0, s_e; |
2642 | ||
2643 | s_t = cb->args[0]; | |
8fb472c0 | 2644 | s_e = cb->args[1]; |
cb6a4e46 | 2645 | |
a8c9486b | 2646 | rcu_read_lock(); |
cb6a4e46 PM |
2647 | ipmr_for_each_table(mrt, net) { |
2648 | if (t < s_t) | |
2649 | goto next_table; | |
8fb472c0 NA |
2650 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) { |
2651 | if (e < s_e) | |
2652 | goto next_entry; | |
2653 | if (ipmr_fill_mroute(mrt, skb, | |
2654 | NETLINK_CB(cb->skb).portid, | |
2655 | cb->nlh->nlmsg_seq, | |
2656 | mfc, RTM_NEWROUTE, | |
2657 | NLM_F_MULTI) < 0) | |
2658 | goto done; | |
cb6a4e46 | 2659 | next_entry: |
8fb472c0 | 2660 | e++; |
cb6a4e46 | 2661 | } |
8fb472c0 NA |
2662 | e = 0; |
2663 | s_e = 0; | |
2664 | ||
1eb99af5 ND |
2665 | spin_lock_bh(&mfc_unres_lock); |
2666 | list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) { | |
2667 | if (e < s_e) | |
2668 | goto next_entry2; | |
2669 | if (ipmr_fill_mroute(mrt, skb, | |
2670 | NETLINK_CB(cb->skb).portid, | |
2671 | cb->nlh->nlmsg_seq, | |
65886f43 ND |
2672 | mfc, RTM_NEWROUTE, |
2673 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2674 | spin_unlock_bh(&mfc_unres_lock); |
2675 | goto done; | |
2676 | } | |
2677 | next_entry2: | |
2678 | e++; | |
2679 | } | |
2680 | spin_unlock_bh(&mfc_unres_lock); | |
8fb472c0 NA |
2681 | e = 0; |
2682 | s_e = 0; | |
cb6a4e46 PM |
2683 | next_table: |
2684 | t++; | |
2685 | } | |
2686 | done: | |
a8c9486b | 2687 | rcu_read_unlock(); |
cb6a4e46 | 2688 | |
8fb472c0 | 2689 | cb->args[1] = e; |
cb6a4e46 PM |
2690 | cb->args[0] = t; |
2691 | ||
2692 | return skb->len; | |
2693 | } | |
2694 | ||
ccbb0aa6 NA |
2695 | static const struct nla_policy rtm_ipmr_policy[RTA_MAX + 1] = { |
2696 | [RTA_SRC] = { .type = NLA_U32 }, | |
2697 | [RTA_DST] = { .type = NLA_U32 }, | |
2698 | [RTA_IIF] = { .type = NLA_U32 }, | |
2699 | [RTA_TABLE] = { .type = NLA_U32 }, | |
2700 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, | |
2701 | }; | |
2702 | ||
2703 | static bool ipmr_rtm_validate_proto(unsigned char rtm_protocol) | |
2704 | { | |
2705 | switch (rtm_protocol) { | |
2706 | case RTPROT_STATIC: | |
2707 | case RTPROT_MROUTED: | |
2708 | return true; | |
2709 | } | |
2710 | return false; | |
2711 | } | |
2712 | ||
2713 | static int ipmr_nla_get_ttls(const struct nlattr *nla, struct mfcctl *mfcc) | |
2714 | { | |
2715 | struct rtnexthop *rtnh = nla_data(nla); | |
2716 | int remaining = nla_len(nla), vifi = 0; | |
2717 | ||
2718 | while (rtnh_ok(rtnh, remaining)) { | |
2719 | mfcc->mfcc_ttls[vifi] = rtnh->rtnh_hops; | |
2720 | if (++vifi == MAXVIFS) | |
2721 | break; | |
2722 | rtnh = rtnh_next(rtnh, &remaining); | |
2723 | } | |
2724 | ||
2725 | return remaining > 0 ? -EINVAL : vifi; | |
2726 | } | |
2727 | ||
2728 | /* returns < 0 on error, 0 for ADD_MFC and 1 for ADD_MFC_PROXY */ | |
2729 | static int rtm_to_ipmr_mfcc(struct net *net, struct nlmsghdr *nlh, | |
2730 | struct mfcctl *mfcc, int *mrtsock, | |
c21ef3e3 DA |
2731 | struct mr_table **mrtret, |
2732 | struct netlink_ext_ack *extack) | |
ccbb0aa6 NA |
2733 | { |
2734 | struct net_device *dev = NULL; | |
2735 | u32 tblid = RT_TABLE_DEFAULT; | |
2736 | struct mr_table *mrt; | |
2737 | struct nlattr *attr; | |
2738 | struct rtmsg *rtm; | |
2739 | int ret, rem; | |
2740 | ||
fceb6435 | 2741 | ret = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipmr_policy, |
c21ef3e3 | 2742 | extack); |
ccbb0aa6 NA |
2743 | if (ret < 0) |
2744 | goto out; | |
2745 | rtm = nlmsg_data(nlh); | |
2746 | ||
2747 | ret = -EINVAL; | |
2748 | if (rtm->rtm_family != RTNL_FAMILY_IPMR || rtm->rtm_dst_len != 32 || | |
2749 | rtm->rtm_type != RTN_MULTICAST || | |
2750 | rtm->rtm_scope != RT_SCOPE_UNIVERSE || | |
2751 | !ipmr_rtm_validate_proto(rtm->rtm_protocol)) | |
2752 | goto out; | |
2753 | ||
2754 | memset(mfcc, 0, sizeof(*mfcc)); | |
2755 | mfcc->mfcc_parent = -1; | |
2756 | ret = 0; | |
2757 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), rem) { | |
2758 | switch (nla_type(attr)) { | |
2759 | case RTA_SRC: | |
2760 | mfcc->mfcc_origin.s_addr = nla_get_be32(attr); | |
2761 | break; | |
2762 | case RTA_DST: | |
2763 | mfcc->mfcc_mcastgrp.s_addr = nla_get_be32(attr); | |
2764 | break; | |
2765 | case RTA_IIF: | |
2766 | dev = __dev_get_by_index(net, nla_get_u32(attr)); | |
2767 | if (!dev) { | |
2768 | ret = -ENODEV; | |
2769 | goto out; | |
2770 | } | |
2771 | break; | |
2772 | case RTA_MULTIPATH: | |
2773 | if (ipmr_nla_get_ttls(attr, mfcc) < 0) { | |
2774 | ret = -EINVAL; | |
2775 | goto out; | |
2776 | } | |
2777 | break; | |
2778 | case RTA_PREFSRC: | |
2779 | ret = 1; | |
2780 | break; | |
2781 | case RTA_TABLE: | |
2782 | tblid = nla_get_u32(attr); | |
2783 | break; | |
2784 | } | |
2785 | } | |
2786 | mrt = ipmr_get_table(net, tblid); | |
2787 | if (!mrt) { | |
2788 | ret = -ENOENT; | |
2789 | goto out; | |
2790 | } | |
2791 | *mrtret = mrt; | |
2792 | *mrtsock = rtm->rtm_protocol == RTPROT_MROUTED ? 1 : 0; | |
2793 | if (dev) | |
2794 | mfcc->mfcc_parent = ipmr_find_vif(mrt, dev); | |
2795 | ||
2796 | out: | |
2797 | return ret; | |
2798 | } | |
2799 | ||
2800 | /* takes care of both newroute and delroute */ | |
c21ef3e3 DA |
2801 | static int ipmr_rtm_route(struct sk_buff *skb, struct nlmsghdr *nlh, |
2802 | struct netlink_ext_ack *extack) | |
ccbb0aa6 NA |
2803 | { |
2804 | struct net *net = sock_net(skb->sk); | |
2805 | int ret, mrtsock, parent; | |
2806 | struct mr_table *tbl; | |
2807 | struct mfcctl mfcc; | |
2808 | ||
2809 | mrtsock = 0; | |
2810 | tbl = NULL; | |
c21ef3e3 | 2811 | ret = rtm_to_ipmr_mfcc(net, nlh, &mfcc, &mrtsock, &tbl, extack); |
ccbb0aa6 NA |
2812 | if (ret < 0) |
2813 | return ret; | |
2814 | ||
2815 | parent = ret ? mfcc.mfcc_parent : -1; | |
2816 | if (nlh->nlmsg_type == RTM_NEWROUTE) | |
2817 | return ipmr_mfc_add(net, tbl, &mfcc, mrtsock, parent); | |
2818 | else | |
2819 | return ipmr_mfc_delete(tbl, &mfcc, parent); | |
2820 | } | |
2821 | ||
772c344d NA |
2822 | static bool ipmr_fill_table(struct mr_table *mrt, struct sk_buff *skb) |
2823 | { | |
2824 | u32 queue_len = atomic_read(&mrt->cache_resolve_queue_len); | |
2825 | ||
2826 | if (nla_put_u32(skb, IPMRA_TABLE_ID, mrt->id) || | |
2827 | nla_put_u32(skb, IPMRA_TABLE_CACHE_RES_QUEUE_LEN, queue_len) || | |
2828 | nla_put_s32(skb, IPMRA_TABLE_MROUTE_REG_VIF_NUM, | |
2829 | mrt->mroute_reg_vif_num) || | |
2830 | nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_ASSERT, | |
2831 | mrt->mroute_do_assert) || | |
2832 | nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_PIM, mrt->mroute_do_pim)) | |
2833 | return false; | |
2834 | ||
2835 | return true; | |
2836 | } | |
2837 | ||
2838 | static bool ipmr_fill_vif(struct mr_table *mrt, u32 vifid, struct sk_buff *skb) | |
2839 | { | |
2840 | struct nlattr *vif_nest; | |
2841 | struct vif_device *vif; | |
2842 | ||
2843 | /* if the VIF doesn't exist just continue */ | |
2844 | if (!VIF_EXISTS(mrt, vifid)) | |
2845 | return true; | |
2846 | ||
2847 | vif = &mrt->vif_table[vifid]; | |
2848 | vif_nest = nla_nest_start(skb, IPMRA_VIF); | |
2849 | if (!vif_nest) | |
2850 | return false; | |
2851 | if (nla_put_u32(skb, IPMRA_VIFA_IFINDEX, vif->dev->ifindex) || | |
2852 | nla_put_u32(skb, IPMRA_VIFA_VIF_ID, vifid) || | |
2853 | nla_put_u16(skb, IPMRA_VIFA_FLAGS, vif->flags) || | |
2854 | nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_IN, vif->bytes_in, | |
2855 | IPMRA_VIFA_PAD) || | |
2856 | nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_OUT, vif->bytes_out, | |
2857 | IPMRA_VIFA_PAD) || | |
2858 | nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_IN, vif->pkt_in, | |
2859 | IPMRA_VIFA_PAD) || | |
2860 | nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_OUT, vif->pkt_out, | |
2861 | IPMRA_VIFA_PAD) || | |
2862 | nla_put_be32(skb, IPMRA_VIFA_LOCAL_ADDR, vif->local) || | |
2863 | nla_put_be32(skb, IPMRA_VIFA_REMOTE_ADDR, vif->remote)) { | |
2864 | nla_nest_cancel(skb, vif_nest); | |
2865 | return false; | |
2866 | } | |
2867 | nla_nest_end(skb, vif_nest); | |
2868 | ||
2869 | return true; | |
2870 | } | |
2871 | ||
2872 | static int ipmr_rtm_dumplink(struct sk_buff *skb, struct netlink_callback *cb) | |
2873 | { | |
2874 | struct net *net = sock_net(skb->sk); | |
2875 | struct nlmsghdr *nlh = NULL; | |
2876 | unsigned int t = 0, s_t; | |
2877 | unsigned int e = 0, s_e; | |
2878 | struct mr_table *mrt; | |
2879 | ||
2880 | s_t = cb->args[0]; | |
2881 | s_e = cb->args[1]; | |
2882 | ||
2883 | ipmr_for_each_table(mrt, net) { | |
2884 | struct nlattr *vifs, *af; | |
2885 | struct ifinfomsg *hdr; | |
2886 | u32 i; | |
2887 | ||
2888 | if (t < s_t) | |
2889 | goto skip_table; | |
2890 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
2891 | cb->nlh->nlmsg_seq, RTM_NEWLINK, | |
2892 | sizeof(*hdr), NLM_F_MULTI); | |
2893 | if (!nlh) | |
2894 | break; | |
2895 | ||
2896 | hdr = nlmsg_data(nlh); | |
2897 | memset(hdr, 0, sizeof(*hdr)); | |
2898 | hdr->ifi_family = RTNL_FAMILY_IPMR; | |
2899 | ||
2900 | af = nla_nest_start(skb, IFLA_AF_SPEC); | |
2901 | if (!af) { | |
2902 | nlmsg_cancel(skb, nlh); | |
2903 | goto out; | |
2904 | } | |
2905 | ||
2906 | if (!ipmr_fill_table(mrt, skb)) { | |
2907 | nlmsg_cancel(skb, nlh); | |
2908 | goto out; | |
2909 | } | |
2910 | ||
2911 | vifs = nla_nest_start(skb, IPMRA_TABLE_VIFS); | |
2912 | if (!vifs) { | |
2913 | nla_nest_end(skb, af); | |
2914 | nlmsg_end(skb, nlh); | |
2915 | goto out; | |
2916 | } | |
2917 | for (i = 0; i < mrt->maxvif; i++) { | |
2918 | if (e < s_e) | |
2919 | goto skip_entry; | |
2920 | if (!ipmr_fill_vif(mrt, i, skb)) { | |
2921 | nla_nest_end(skb, vifs); | |
2922 | nla_nest_end(skb, af); | |
2923 | nlmsg_end(skb, nlh); | |
2924 | goto out; | |
2925 | } | |
2926 | skip_entry: | |
2927 | e++; | |
2928 | } | |
2929 | s_e = 0; | |
2930 | e = 0; | |
2931 | nla_nest_end(skb, vifs); | |
2932 | nla_nest_end(skb, af); | |
2933 | nlmsg_end(skb, nlh); | |
2934 | skip_table: | |
2935 | t++; | |
2936 | } | |
2937 | ||
2938 | out: | |
2939 | cb->args[1] = e; | |
2940 | cb->args[0] = t; | |
2941 | ||
2942 | return skb->len; | |
2943 | } | |
2944 | ||
e905a9ed | 2945 | #ifdef CONFIG_PROC_FS |
7ef8f65d NA |
2946 | /* The /proc interfaces to multicast routing : |
2947 | * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif | |
1da177e4 LT |
2948 | */ |
2949 | struct ipmr_vif_iter { | |
f6bb4514 | 2950 | struct seq_net_private p; |
f0ad0860 | 2951 | struct mr_table *mrt; |
1da177e4 LT |
2952 | int ct; |
2953 | }; | |
2954 | ||
f6bb4514 BT |
2955 | static struct vif_device *ipmr_vif_seq_idx(struct net *net, |
2956 | struct ipmr_vif_iter *iter, | |
1da177e4 LT |
2957 | loff_t pos) |
2958 | { | |
f0ad0860 | 2959 | struct mr_table *mrt = iter->mrt; |
0c12295a PM |
2960 | |
2961 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
2962 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 2963 | continue; |
e905a9ed | 2964 | if (pos-- == 0) |
0c12295a | 2965 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
2966 | } |
2967 | return NULL; | |
2968 | } | |
2969 | ||
2970 | static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
ba93ef74 | 2971 | __acquires(mrt_lock) |
1da177e4 | 2972 | { |
f0ad0860 | 2973 | struct ipmr_vif_iter *iter = seq->private; |
f6bb4514 | 2974 | struct net *net = seq_file_net(seq); |
f0ad0860 PM |
2975 | struct mr_table *mrt; |
2976 | ||
2977 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); | |
51456b29 | 2978 | if (!mrt) |
f0ad0860 PM |
2979 | return ERR_PTR(-ENOENT); |
2980 | ||
2981 | iter->mrt = mrt; | |
f6bb4514 | 2982 | |
1da177e4 | 2983 | read_lock(&mrt_lock); |
f6bb4514 | 2984 | return *pos ? ipmr_vif_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
2985 | : SEQ_START_TOKEN; |
2986 | } | |
2987 | ||
2988 | static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2989 | { | |
2990 | struct ipmr_vif_iter *iter = seq->private; | |
f6bb4514 | 2991 | struct net *net = seq_file_net(seq); |
f0ad0860 | 2992 | struct mr_table *mrt = iter->mrt; |
1da177e4 LT |
2993 | |
2994 | ++*pos; | |
2995 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 2996 | return ipmr_vif_seq_idx(net, iter, 0); |
e905a9ed | 2997 | |
0c12295a PM |
2998 | while (++iter->ct < mrt->maxvif) { |
2999 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 3000 | continue; |
0c12295a | 3001 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
3002 | } |
3003 | return NULL; | |
3004 | } | |
3005 | ||
3006 | static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) | |
ba93ef74 | 3007 | __releases(mrt_lock) |
1da177e4 LT |
3008 | { |
3009 | read_unlock(&mrt_lock); | |
3010 | } | |
3011 | ||
3012 | static int ipmr_vif_seq_show(struct seq_file *seq, void *v) | |
3013 | { | |
f0ad0860 PM |
3014 | struct ipmr_vif_iter *iter = seq->private; |
3015 | struct mr_table *mrt = iter->mrt; | |
f6bb4514 | 3016 | |
1da177e4 | 3017 | if (v == SEQ_START_TOKEN) { |
e905a9ed | 3018 | seq_puts(seq, |
1da177e4 LT |
3019 | "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); |
3020 | } else { | |
3021 | const struct vif_device *vif = v; | |
3022 | const char *name = vif->dev ? vif->dev->name : "none"; | |
3023 | ||
3024 | seq_printf(seq, | |
5b5e0928 | 3025 | "%2zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", |
0c12295a | 3026 | vif - mrt->vif_table, |
e905a9ed | 3027 | name, vif->bytes_in, vif->pkt_in, |
1da177e4 LT |
3028 | vif->bytes_out, vif->pkt_out, |
3029 | vif->flags, vif->local, vif->remote); | |
3030 | } | |
3031 | return 0; | |
3032 | } | |
3033 | ||
f690808e | 3034 | static const struct seq_operations ipmr_vif_seq_ops = { |
1da177e4 LT |
3035 | .start = ipmr_vif_seq_start, |
3036 | .next = ipmr_vif_seq_next, | |
3037 | .stop = ipmr_vif_seq_stop, | |
3038 | .show = ipmr_vif_seq_show, | |
3039 | }; | |
3040 | ||
3041 | static int ipmr_vif_open(struct inode *inode, struct file *file) | |
3042 | { | |
f6bb4514 BT |
3043 | return seq_open_net(inode, file, &ipmr_vif_seq_ops, |
3044 | sizeof(struct ipmr_vif_iter)); | |
1da177e4 LT |
3045 | } |
3046 | ||
9a32144e | 3047 | static const struct file_operations ipmr_vif_fops = { |
1da177e4 LT |
3048 | .owner = THIS_MODULE, |
3049 | .open = ipmr_vif_open, | |
3050 | .read = seq_read, | |
3051 | .llseek = seq_lseek, | |
f6bb4514 | 3052 | .release = seq_release_net, |
1da177e4 LT |
3053 | }; |
3054 | ||
3055 | struct ipmr_mfc_iter { | |
f6bb4514 | 3056 | struct seq_net_private p; |
f0ad0860 | 3057 | struct mr_table *mrt; |
862465f2 | 3058 | struct list_head *cache; |
1da177e4 LT |
3059 | }; |
3060 | ||
f6bb4514 BT |
3061 | static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net, |
3062 | struct ipmr_mfc_iter *it, loff_t pos) | |
1da177e4 | 3063 | { |
f0ad0860 | 3064 | struct mr_table *mrt = it->mrt; |
1da177e4 LT |
3065 | struct mfc_cache *mfc; |
3066 | ||
a8c9486b | 3067 | rcu_read_lock(); |
8fb472c0 NA |
3068 | it->cache = &mrt->mfc_cache_list; |
3069 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) | |
3070 | if (pos-- == 0) | |
3071 | return mfc; | |
a8c9486b | 3072 | rcu_read_unlock(); |
1da177e4 | 3073 | |
1da177e4 | 3074 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 3075 | it->cache = &mrt->mfc_unres_queue; |
862465f2 | 3076 | list_for_each_entry(mfc, it->cache, list) |
e258beb2 | 3077 | if (pos-- == 0) |
1da177e4 LT |
3078 | return mfc; |
3079 | spin_unlock_bh(&mfc_unres_lock); | |
3080 | ||
3081 | it->cache = NULL; | |
3082 | return NULL; | |
3083 | } | |
3084 | ||
3085 | ||
3086 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
3087 | { | |
3088 | struct ipmr_mfc_iter *it = seq->private; | |
f6bb4514 | 3089 | struct net *net = seq_file_net(seq); |
f0ad0860 | 3090 | struct mr_table *mrt; |
f6bb4514 | 3091 | |
f0ad0860 | 3092 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 3093 | if (!mrt) |
f0ad0860 | 3094 | return ERR_PTR(-ENOENT); |
f6bb4514 | 3095 | |
f0ad0860 | 3096 | it->mrt = mrt; |
1da177e4 | 3097 | it->cache = NULL; |
f6bb4514 | 3098 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
3099 | : SEQ_START_TOKEN; |
3100 | } | |
3101 | ||
3102 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3103 | { | |
1da177e4 | 3104 | struct ipmr_mfc_iter *it = seq->private; |
f6bb4514 | 3105 | struct net *net = seq_file_net(seq); |
f0ad0860 | 3106 | struct mr_table *mrt = it->mrt; |
8fb472c0 | 3107 | struct mfc_cache *mfc = v; |
1da177e4 LT |
3108 | |
3109 | ++*pos; | |
3110 | ||
3111 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 3112 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
1da177e4 | 3113 | |
862465f2 PM |
3114 | if (mfc->list.next != it->cache) |
3115 | return list_entry(mfc->list.next, struct mfc_cache, list); | |
e905a9ed | 3116 | |
0c12295a | 3117 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 LT |
3118 | goto end_of_list; |
3119 | ||
1da177e4 | 3120 | /* exhausted cache_array, show unresolved */ |
a8c9486b | 3121 | rcu_read_unlock(); |
0c12295a | 3122 | it->cache = &mrt->mfc_unres_queue; |
e905a9ed | 3123 | |
1da177e4 | 3124 | spin_lock_bh(&mfc_unres_lock); |
862465f2 PM |
3125 | if (!list_empty(it->cache)) |
3126 | return list_first_entry(it->cache, struct mfc_cache, list); | |
1da177e4 | 3127 | |
a8cb16dd | 3128 | end_of_list: |
1da177e4 LT |
3129 | spin_unlock_bh(&mfc_unres_lock); |
3130 | it->cache = NULL; | |
3131 | ||
3132 | return NULL; | |
3133 | } | |
3134 | ||
3135 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
3136 | { | |
3137 | struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 3138 | struct mr_table *mrt = it->mrt; |
1da177e4 | 3139 | |
0c12295a | 3140 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 | 3141 | spin_unlock_bh(&mfc_unres_lock); |
8fb472c0 | 3142 | else if (it->cache == &mrt->mfc_cache_list) |
a8c9486b | 3143 | rcu_read_unlock(); |
1da177e4 LT |
3144 | } |
3145 | ||
3146 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
3147 | { | |
3148 | int n; | |
3149 | ||
3150 | if (v == SEQ_START_TOKEN) { | |
e905a9ed | 3151 | seq_puts(seq, |
1da177e4 LT |
3152 | "Group Origin Iif Pkts Bytes Wrong Oifs\n"); |
3153 | } else { | |
3154 | const struct mfc_cache *mfc = v; | |
3155 | const struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 3156 | const struct mr_table *mrt = it->mrt; |
e905a9ed | 3157 | |
0eae88f3 ED |
3158 | seq_printf(seq, "%08X %08X %-3hd", |
3159 | (__force u32) mfc->mfc_mcastgrp, | |
3160 | (__force u32) mfc->mfc_origin, | |
1ea472e2 | 3161 | mfc->mfc_parent); |
1da177e4 | 3162 | |
0c12295a | 3163 | if (it->cache != &mrt->mfc_unres_queue) { |
1ea472e2 BT |
3164 | seq_printf(seq, " %8lu %8lu %8lu", |
3165 | mfc->mfc_un.res.pkt, | |
3166 | mfc->mfc_un.res.bytes, | |
3167 | mfc->mfc_un.res.wrong_if); | |
132adf54 | 3168 | for (n = mfc->mfc_un.res.minvif; |
a8cb16dd | 3169 | n < mfc->mfc_un.res.maxvif; n++) { |
0c12295a | 3170 | if (VIF_EXISTS(mrt, n) && |
cf958ae3 BT |
3171 | mfc->mfc_un.res.ttls[n] < 255) |
3172 | seq_printf(seq, | |
e905a9ed | 3173 | " %2d:%-3d", |
1da177e4 LT |
3174 | n, mfc->mfc_un.res.ttls[n]); |
3175 | } | |
1ea472e2 BT |
3176 | } else { |
3177 | /* unresolved mfc_caches don't contain | |
3178 | * pkt, bytes and wrong_if values | |
3179 | */ | |
3180 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
1da177e4 LT |
3181 | } |
3182 | seq_putc(seq, '\n'); | |
3183 | } | |
3184 | return 0; | |
3185 | } | |
3186 | ||
f690808e | 3187 | static const struct seq_operations ipmr_mfc_seq_ops = { |
1da177e4 LT |
3188 | .start = ipmr_mfc_seq_start, |
3189 | .next = ipmr_mfc_seq_next, | |
3190 | .stop = ipmr_mfc_seq_stop, | |
3191 | .show = ipmr_mfc_seq_show, | |
3192 | }; | |
3193 | ||
3194 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
3195 | { | |
f6bb4514 BT |
3196 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
3197 | sizeof(struct ipmr_mfc_iter)); | |
1da177e4 LT |
3198 | } |
3199 | ||
9a32144e | 3200 | static const struct file_operations ipmr_mfc_fops = { |
1da177e4 LT |
3201 | .owner = THIS_MODULE, |
3202 | .open = ipmr_mfc_open, | |
3203 | .read = seq_read, | |
3204 | .llseek = seq_lseek, | |
f6bb4514 | 3205 | .release = seq_release_net, |
1da177e4 | 3206 | }; |
e905a9ed | 3207 | #endif |
1da177e4 LT |
3208 | |
3209 | #ifdef CONFIG_IP_PIMSM_V2 | |
32613090 | 3210 | static const struct net_protocol pim_protocol = { |
1da177e4 | 3211 | .handler = pim_rcv, |
403dbb97 | 3212 | .netns_ok = 1, |
1da177e4 LT |
3213 | }; |
3214 | #endif | |
3215 | ||
4d65b948 YG |
3216 | static unsigned int ipmr_seq_read(struct net *net) |
3217 | { | |
3218 | ASSERT_RTNL(); | |
3219 | ||
3220 | return net->ipv4.ipmr_seq + ipmr_rules_seq_read(net); | |
3221 | } | |
3222 | ||
3223 | static int ipmr_dump(struct net *net, struct notifier_block *nb) | |
3224 | { | |
3225 | struct mr_table *mrt; | |
3226 | int err; | |
3227 | ||
3228 | err = ipmr_rules_dump(net, nb); | |
3229 | if (err) | |
3230 | return err; | |
3231 | ||
3232 | ipmr_for_each_table(mrt, net) { | |
3233 | struct vif_device *v = &mrt->vif_table[0]; | |
3234 | struct mfc_cache *mfc; | |
3235 | int vifi; | |
3236 | ||
3237 | /* Notifiy on table VIF entries */ | |
3238 | read_lock(&mrt_lock); | |
3239 | for (vifi = 0; vifi < mrt->maxvif; vifi++, v++) { | |
3240 | if (!v->dev) | |
3241 | continue; | |
3242 | ||
3243 | call_ipmr_vif_entry_notifier(nb, net, FIB_EVENT_VIF_ADD, | |
3244 | v, vifi, mrt->id); | |
3245 | } | |
3246 | read_unlock(&mrt_lock); | |
3247 | ||
3248 | /* Notify on table MFC entries */ | |
3249 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) | |
3250 | call_ipmr_mfc_entry_notifier(nb, net, | |
3251 | FIB_EVENT_ENTRY_ADD, mfc, | |
3252 | mrt->id); | |
3253 | } | |
3254 | ||
3255 | return 0; | |
3256 | } | |
3257 | ||
3258 | static const struct fib_notifier_ops ipmr_notifier_ops_template = { | |
3259 | .family = RTNL_FAMILY_IPMR, | |
3260 | .fib_seq_read = ipmr_seq_read, | |
3261 | .fib_dump = ipmr_dump, | |
3262 | .owner = THIS_MODULE, | |
3263 | }; | |
3264 | ||
ef739d8a | 3265 | static int __net_init ipmr_notifier_init(struct net *net) |
4d65b948 YG |
3266 | { |
3267 | struct fib_notifier_ops *ops; | |
3268 | ||
3269 | net->ipv4.ipmr_seq = 0; | |
3270 | ||
3271 | ops = fib_notifier_ops_register(&ipmr_notifier_ops_template, net); | |
3272 | if (IS_ERR(ops)) | |
3273 | return PTR_ERR(ops); | |
3274 | net->ipv4.ipmr_notifier_ops = ops; | |
3275 | ||
3276 | return 0; | |
3277 | } | |
3278 | ||
3279 | static void __net_exit ipmr_notifier_exit(struct net *net) | |
3280 | { | |
3281 | fib_notifier_ops_unregister(net->ipv4.ipmr_notifier_ops); | |
3282 | net->ipv4.ipmr_notifier_ops = NULL; | |
3283 | } | |
3284 | ||
7ef8f65d | 3285 | /* Setup for IP multicast routing */ |
cf958ae3 BT |
3286 | static int __net_init ipmr_net_init(struct net *net) |
3287 | { | |
f0ad0860 | 3288 | int err; |
cf958ae3 | 3289 | |
4d65b948 YG |
3290 | err = ipmr_notifier_init(net); |
3291 | if (err) | |
3292 | goto ipmr_notifier_fail; | |
3293 | ||
f0ad0860 PM |
3294 | err = ipmr_rules_init(net); |
3295 | if (err < 0) | |
4d65b948 | 3296 | goto ipmr_rules_fail; |
f6bb4514 BT |
3297 | |
3298 | #ifdef CONFIG_PROC_FS | |
3299 | err = -ENOMEM; | |
d4beaa66 | 3300 | if (!proc_create("ip_mr_vif", 0, net->proc_net, &ipmr_vif_fops)) |
f6bb4514 | 3301 | goto proc_vif_fail; |
d4beaa66 | 3302 | if (!proc_create("ip_mr_cache", 0, net->proc_net, &ipmr_mfc_fops)) |
f6bb4514 BT |
3303 | goto proc_cache_fail; |
3304 | #endif | |
2bb8b26c BT |
3305 | return 0; |
3306 | ||
f6bb4514 BT |
3307 | #ifdef CONFIG_PROC_FS |
3308 | proc_cache_fail: | |
ece31ffd | 3309 | remove_proc_entry("ip_mr_vif", net->proc_net); |
f6bb4514 | 3310 | proc_vif_fail: |
f0ad0860 | 3311 | ipmr_rules_exit(net); |
f6bb4514 | 3312 | #endif |
4d65b948 YG |
3313 | ipmr_rules_fail: |
3314 | ipmr_notifier_exit(net); | |
3315 | ipmr_notifier_fail: | |
cf958ae3 BT |
3316 | return err; |
3317 | } | |
3318 | ||
3319 | static void __net_exit ipmr_net_exit(struct net *net) | |
3320 | { | |
f6bb4514 | 3321 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
3322 | remove_proc_entry("ip_mr_cache", net->proc_net); |
3323 | remove_proc_entry("ip_mr_vif", net->proc_net); | |
f6bb4514 | 3324 | #endif |
4d65b948 | 3325 | ipmr_notifier_exit(net); |
f0ad0860 | 3326 | ipmr_rules_exit(net); |
cf958ae3 BT |
3327 | } |
3328 | ||
3329 | static struct pernet_operations ipmr_net_ops = { | |
3330 | .init = ipmr_net_init, | |
3331 | .exit = ipmr_net_exit, | |
3332 | }; | |
e905a9ed | 3333 | |
03d2f897 | 3334 | int __init ip_mr_init(void) |
1da177e4 | 3335 | { |
03d2f897 WC |
3336 | int err; |
3337 | ||
1da177e4 LT |
3338 | mrt_cachep = kmem_cache_create("ip_mrt_cache", |
3339 | sizeof(struct mfc_cache), | |
a8c9486b | 3340 | 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, |
20c2df83 | 3341 | NULL); |
03d2f897 | 3342 | |
cf958ae3 BT |
3343 | err = register_pernet_subsys(&ipmr_net_ops); |
3344 | if (err) | |
3345 | goto reg_pernet_fail; | |
3346 | ||
03d2f897 WC |
3347 | err = register_netdevice_notifier(&ip_mr_notifier); |
3348 | if (err) | |
3349 | goto reg_notif_fail; | |
403dbb97 TG |
3350 | #ifdef CONFIG_IP_PIMSM_V2 |
3351 | if (inet_add_protocol(&pim_protocol, IPPROTO_PIM) < 0) { | |
058bd4d2 | 3352 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
3353 | err = -EAGAIN; |
3354 | goto add_proto_fail; | |
3355 | } | |
3356 | #endif | |
c7ac8679 | 3357 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETROUTE, |
b97bac64 | 3358 | ipmr_rtm_getroute, ipmr_rtm_dumproute, 0); |
ccbb0aa6 | 3359 | rtnl_register(RTNL_FAMILY_IPMR, RTM_NEWROUTE, |
b97bac64 | 3360 | ipmr_rtm_route, NULL, 0); |
ccbb0aa6 | 3361 | rtnl_register(RTNL_FAMILY_IPMR, RTM_DELROUTE, |
b97bac64 | 3362 | ipmr_rtm_route, NULL, 0); |
772c344d NA |
3363 | |
3364 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETLINK, | |
b97bac64 | 3365 | NULL, ipmr_rtm_dumplink, 0); |
03d2f897 | 3366 | return 0; |
f6bb4514 | 3367 | |
403dbb97 TG |
3368 | #ifdef CONFIG_IP_PIMSM_V2 |
3369 | add_proto_fail: | |
3370 | unregister_netdevice_notifier(&ip_mr_notifier); | |
3371 | #endif | |
c3e38896 | 3372 | reg_notif_fail: |
cf958ae3 BT |
3373 | unregister_pernet_subsys(&ipmr_net_ops); |
3374 | reg_pernet_fail: | |
c3e38896 | 3375 | kmem_cache_destroy(mrt_cachep); |
03d2f897 | 3376 | return err; |
1da177e4 | 3377 | } |