Commit | Line | Data |
---|---|---|
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); |
f0ad0860 PM |
115 | static void ipmr_expire_process(unsigned long arg); |
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 | ||
378 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, | |
379 | (unsigned long)mrt); | |
380 | ||
f0ad0860 | 381 | mrt->mroute_reg_vif_num = -1; |
f0ad0860 PM |
382 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
383 | list_add_tail_rcu(&mrt->list, &net->ipv4.mr_tables); | |
384 | #endif | |
385 | return mrt; | |
386 | } | |
1da177e4 | 387 | |
acbb219d FR |
388 | static void ipmr_free_table(struct mr_table *mrt) |
389 | { | |
390 | del_timer_sync(&mrt->ipmr_expire_timer); | |
0e615e96 | 391 | mroute_clean_tables(mrt, true); |
8fb472c0 | 392 | rhltable_destroy(&mrt->mfc_hash); |
acbb219d FR |
393 | kfree(mrt); |
394 | } | |
395 | ||
1da177e4 LT |
396 | /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ |
397 | ||
d607032d WC |
398 | static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) |
399 | { | |
4feb88e5 BT |
400 | struct net *net = dev_net(dev); |
401 | ||
d607032d WC |
402 | dev_close(dev); |
403 | ||
4feb88e5 | 404 | dev = __dev_get_by_name(net, "tunl0"); |
d607032d | 405 | if (dev) { |
5bc3eb7e | 406 | const struct net_device_ops *ops = dev->netdev_ops; |
d607032d | 407 | struct ifreq ifr; |
d607032d WC |
408 | struct ip_tunnel_parm p; |
409 | ||
410 | memset(&p, 0, sizeof(p)); | |
411 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
412 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
413 | p.iph.version = 4; | |
414 | p.iph.ihl = 5; | |
415 | p.iph.protocol = IPPROTO_IPIP; | |
416 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
417 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; | |
418 | ||
5bc3eb7e SH |
419 | if (ops->ndo_do_ioctl) { |
420 | mm_segment_t oldfs = get_fs(); | |
421 | ||
422 | set_fs(KERNEL_DS); | |
423 | ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); | |
424 | set_fs(oldfs); | |
425 | } | |
d607032d WC |
426 | } |
427 | } | |
428 | ||
a0b47736 NA |
429 | /* Initialize ipmr pimreg/tunnel in_device */ |
430 | static bool ipmr_init_vif_indev(const struct net_device *dev) | |
431 | { | |
432 | struct in_device *in_dev; | |
433 | ||
434 | ASSERT_RTNL(); | |
435 | ||
436 | in_dev = __in_dev_get_rtnl(dev); | |
437 | if (!in_dev) | |
438 | return false; | |
439 | ipv4_devconf_setall(in_dev); | |
440 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
441 | IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; | |
442 | ||
443 | return true; | |
444 | } | |
445 | ||
7ef8f65d | 446 | static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v) |
1da177e4 LT |
447 | { |
448 | struct net_device *dev; | |
449 | ||
4feb88e5 | 450 | dev = __dev_get_by_name(net, "tunl0"); |
1da177e4 LT |
451 | |
452 | if (dev) { | |
5bc3eb7e | 453 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 LT |
454 | int err; |
455 | struct ifreq ifr; | |
1da177e4 | 456 | struct ip_tunnel_parm p; |
1da177e4 LT |
457 | |
458 | memset(&p, 0, sizeof(p)); | |
459 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
460 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
461 | p.iph.version = 4; | |
462 | p.iph.ihl = 5; | |
463 | p.iph.protocol = IPPROTO_IPIP; | |
464 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
ba93ef74 | 465 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 466 | |
5bc3eb7e SH |
467 | if (ops->ndo_do_ioctl) { |
468 | mm_segment_t oldfs = get_fs(); | |
469 | ||
470 | set_fs(KERNEL_DS); | |
471 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
472 | set_fs(oldfs); | |
a8cb16dd | 473 | } else { |
5bc3eb7e | 474 | err = -EOPNOTSUPP; |
a8cb16dd | 475 | } |
1da177e4 LT |
476 | dev = NULL; |
477 | ||
4feb88e5 BT |
478 | if (err == 0 && |
479 | (dev = __dev_get_by_name(net, p.name)) != NULL) { | |
1da177e4 | 480 | dev->flags |= IFF_MULTICAST; |
a0b47736 | 481 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 482 | goto failure; |
1da177e4 LT |
483 | if (dev_open(dev)) |
484 | goto failure; | |
7dc00c82 | 485 | dev_hold(dev); |
1da177e4 LT |
486 | } |
487 | } | |
488 | return dev; | |
489 | ||
490 | failure: | |
1da177e4 LT |
491 | unregister_netdevice(dev); |
492 | return NULL; | |
493 | } | |
494 | ||
c316c629 | 495 | #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) |
6fef4c0c | 496 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 497 | { |
4feb88e5 | 498 | struct net *net = dev_net(dev); |
f0ad0860 | 499 | struct mr_table *mrt; |
da91981b DM |
500 | struct flowi4 fl4 = { |
501 | .flowi4_oif = dev->ifindex, | |
6a662719 | 502 | .flowi4_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
da91981b | 503 | .flowi4_mark = skb->mark, |
f0ad0860 PM |
504 | }; |
505 | int err; | |
506 | ||
da91981b | 507 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
e40dbc51 BG |
508 | if (err < 0) { |
509 | kfree_skb(skb); | |
f0ad0860 | 510 | return err; |
e40dbc51 | 511 | } |
4feb88e5 | 512 | |
1da177e4 | 513 | read_lock(&mrt_lock); |
cf3677ae PE |
514 | dev->stats.tx_bytes += skb->len; |
515 | dev->stats.tx_packets++; | |
0c12295a | 516 | ipmr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, IGMPMSG_WHOLEPKT); |
1da177e4 LT |
517 | read_unlock(&mrt_lock); |
518 | kfree_skb(skb); | |
6ed10654 | 519 | return NETDEV_TX_OK; |
1da177e4 LT |
520 | } |
521 | ||
ee9b9596 ND |
522 | static int reg_vif_get_iflink(const struct net_device *dev) |
523 | { | |
524 | return 0; | |
525 | } | |
526 | ||
007c3838 SH |
527 | static const struct net_device_ops reg_vif_netdev_ops = { |
528 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 529 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
530 | }; |
531 | ||
1da177e4 LT |
532 | static void reg_vif_setup(struct net_device *dev) |
533 | { | |
534 | dev->type = ARPHRD_PIMREG; | |
46f25dff | 535 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; |
1da177e4 | 536 | dev->flags = IFF_NOARP; |
70cb4a45 | 537 | dev->netdev_ops = ®_vif_netdev_ops; |
cf124db5 | 538 | dev->needs_free_netdev = true; |
403dbb97 | 539 | dev->features |= NETIF_F_NETNS_LOCAL; |
1da177e4 LT |
540 | } |
541 | ||
f0ad0860 | 542 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) |
1da177e4 LT |
543 | { |
544 | struct net_device *dev; | |
f0ad0860 | 545 | char name[IFNAMSIZ]; |
1da177e4 | 546 | |
f0ad0860 PM |
547 | if (mrt->id == RT_TABLE_DEFAULT) |
548 | sprintf(name, "pimreg"); | |
549 | else | |
550 | sprintf(name, "pimreg%u", mrt->id); | |
1da177e4 | 551 | |
c835a677 | 552 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
1da177e4 | 553 | |
51456b29 | 554 | if (!dev) |
1da177e4 LT |
555 | return NULL; |
556 | ||
403dbb97 TG |
557 | dev_net_set(dev, net); |
558 | ||
1da177e4 LT |
559 | if (register_netdevice(dev)) { |
560 | free_netdev(dev); | |
561 | return NULL; | |
562 | } | |
1da177e4 | 563 | |
a0b47736 | 564 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 565 | goto failure; |
1da177e4 LT |
566 | if (dev_open(dev)) |
567 | goto failure; | |
568 | ||
7dc00c82 WC |
569 | dev_hold(dev); |
570 | ||
1da177e4 LT |
571 | return dev; |
572 | ||
573 | failure: | |
1da177e4 LT |
574 | unregister_netdevice(dev); |
575 | return NULL; | |
576 | } | |
c316c629 NA |
577 | |
578 | /* called with rcu_read_lock() */ | |
579 | static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, | |
580 | unsigned int pimlen) | |
581 | { | |
582 | struct net_device *reg_dev = NULL; | |
583 | struct iphdr *encap; | |
584 | ||
585 | encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); | |
7ef8f65d | 586 | /* Check that: |
c316c629 NA |
587 | * a. packet is really sent to a multicast group |
588 | * b. packet is not a NULL-REGISTER | |
589 | * c. packet is not truncated | |
590 | */ | |
591 | if (!ipv4_is_multicast(encap->daddr) || | |
592 | encap->tot_len == 0 || | |
593 | ntohs(encap->tot_len) + pimlen > skb->len) | |
594 | return 1; | |
595 | ||
596 | read_lock(&mrt_lock); | |
597 | if (mrt->mroute_reg_vif_num >= 0) | |
598 | reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev; | |
599 | read_unlock(&mrt_lock); | |
600 | ||
601 | if (!reg_dev) | |
602 | return 1; | |
603 | ||
604 | skb->mac_header = skb->network_header; | |
605 | skb_pull(skb, (u8 *)encap - skb->data); | |
606 | skb_reset_network_header(skb); | |
607 | skb->protocol = htons(ETH_P_IP); | |
608 | skb->ip_summed = CHECKSUM_NONE; | |
609 | ||
610 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); | |
611 | ||
612 | netif_rx(skb); | |
613 | ||
614 | return NET_RX_SUCCESS; | |
615 | } | |
616 | #else | |
617 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) | |
618 | { | |
619 | return NULL; | |
620 | } | |
1da177e4 LT |
621 | #endif |
622 | ||
4d65b948 YG |
623 | static int call_ipmr_vif_entry_notifier(struct notifier_block *nb, |
624 | struct net *net, | |
625 | enum fib_event_type event_type, | |
626 | struct vif_device *vif, | |
627 | vifi_t vif_index, u32 tb_id) | |
628 | { | |
629 | struct vif_entry_notifier_info info = { | |
630 | .info = { | |
631 | .family = RTNL_FAMILY_IPMR, | |
632 | .net = net, | |
633 | }, | |
634 | .dev = vif->dev, | |
635 | .vif_index = vif_index, | |
636 | .vif_flags = vif->flags, | |
637 | .tb_id = tb_id, | |
638 | }; | |
639 | ||
640 | return call_fib_notifier(nb, net, event_type, &info.info); | |
641 | } | |
642 | ||
b362053a YG |
643 | static int call_ipmr_vif_entry_notifiers(struct net *net, |
644 | enum fib_event_type event_type, | |
645 | struct vif_device *vif, | |
646 | vifi_t vif_index, u32 tb_id) | |
647 | { | |
648 | struct vif_entry_notifier_info info = { | |
649 | .info = { | |
650 | .family = RTNL_FAMILY_IPMR, | |
651 | .net = net, | |
652 | }, | |
653 | .dev = vif->dev, | |
654 | .vif_index = vif_index, | |
655 | .vif_flags = vif->flags, | |
656 | .tb_id = tb_id, | |
657 | }; | |
658 | ||
659 | ASSERT_RTNL(); | |
660 | net->ipv4.ipmr_seq++; | |
661 | return call_fib_notifiers(net, event_type, &info.info); | |
662 | } | |
663 | ||
4d65b948 YG |
664 | static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb, |
665 | struct net *net, | |
666 | enum fib_event_type event_type, | |
667 | struct mfc_cache *mfc, u32 tb_id) | |
668 | { | |
669 | struct mfc_entry_notifier_info info = { | |
670 | .info = { | |
671 | .family = RTNL_FAMILY_IPMR, | |
672 | .net = net, | |
673 | }, | |
674 | .mfc = mfc, | |
675 | .tb_id = tb_id | |
676 | }; | |
677 | ||
678 | return call_fib_notifier(nb, net, event_type, &info.info); | |
679 | } | |
680 | ||
b362053a YG |
681 | static int call_ipmr_mfc_entry_notifiers(struct net *net, |
682 | enum fib_event_type event_type, | |
683 | struct mfc_cache *mfc, u32 tb_id) | |
684 | { | |
685 | struct mfc_entry_notifier_info info = { | |
686 | .info = { | |
687 | .family = RTNL_FAMILY_IPMR, | |
688 | .net = net, | |
689 | }, | |
690 | .mfc = mfc, | |
691 | .tb_id = tb_id | |
692 | }; | |
693 | ||
694 | ASSERT_RTNL(); | |
695 | net->ipv4.ipmr_seq++; | |
696 | return call_fib_notifiers(net, event_type, &info.info); | |
697 | } | |
698 | ||
2c53040f BH |
699 | /** |
700 | * vif_delete - Delete a VIF entry | |
7dc00c82 | 701 | * @notify: Set to 1, if the caller is a notifier_call |
1da177e4 | 702 | */ |
0c12295a | 703 | static int vif_delete(struct mr_table *mrt, int vifi, int notify, |
d17fa6fa | 704 | struct list_head *head) |
1da177e4 | 705 | { |
b362053a | 706 | struct net *net = read_pnet(&mrt->net); |
1da177e4 LT |
707 | struct vif_device *v; |
708 | struct net_device *dev; | |
709 | struct in_device *in_dev; | |
710 | ||
0c12295a | 711 | if (vifi < 0 || vifi >= mrt->maxvif) |
1da177e4 LT |
712 | return -EADDRNOTAVAIL; |
713 | ||
0c12295a | 714 | v = &mrt->vif_table[vifi]; |
1da177e4 | 715 | |
b362053a YG |
716 | if (VIF_EXISTS(mrt, vifi)) |
717 | call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_DEL, v, vifi, | |
718 | mrt->id); | |
719 | ||
1da177e4 LT |
720 | write_lock_bh(&mrt_lock); |
721 | dev = v->dev; | |
722 | v->dev = NULL; | |
723 | ||
724 | if (!dev) { | |
725 | write_unlock_bh(&mrt_lock); | |
726 | return -EADDRNOTAVAIL; | |
727 | } | |
728 | ||
0c12295a PM |
729 | if (vifi == mrt->mroute_reg_vif_num) |
730 | mrt->mroute_reg_vif_num = -1; | |
1da177e4 | 731 | |
a8cb16dd | 732 | if (vifi + 1 == mrt->maxvif) { |
1da177e4 | 733 | int tmp; |
a8cb16dd ED |
734 | |
735 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
0c12295a | 736 | if (VIF_EXISTS(mrt, tmp)) |
1da177e4 LT |
737 | break; |
738 | } | |
0c12295a | 739 | mrt->maxvif = tmp+1; |
1da177e4 LT |
740 | } |
741 | ||
742 | write_unlock_bh(&mrt_lock); | |
743 | ||
744 | dev_set_allmulti(dev, -1); | |
745 | ||
a8cb16dd ED |
746 | in_dev = __in_dev_get_rtnl(dev); |
747 | if (in_dev) { | |
42f811b8 | 748 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; |
3b022865 | 749 | inet_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
d67b8c61 ND |
750 | NETCONFA_MC_FORWARDING, |
751 | dev->ifindex, &in_dev->cnf); | |
1da177e4 LT |
752 | ip_rt_multicast_event(in_dev); |
753 | } | |
754 | ||
a8cb16dd | 755 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER) && !notify) |
d17fa6fa | 756 | unregister_netdevice_queue(dev, head); |
1da177e4 LT |
757 | |
758 | dev_put(dev); | |
759 | return 0; | |
760 | } | |
761 | ||
a8c9486b | 762 | static void ipmr_cache_free_rcu(struct rcu_head *head) |
5c0a66f5 | 763 | { |
a8c9486b ED |
764 | struct mfc_cache *c = container_of(head, struct mfc_cache, rcu); |
765 | ||
5c0a66f5 BT |
766 | kmem_cache_free(mrt_cachep, c); |
767 | } | |
768 | ||
310ebbba | 769 | void ipmr_cache_free(struct mfc_cache *c) |
a8c9486b ED |
770 | { |
771 | call_rcu(&c->rcu, ipmr_cache_free_rcu); | |
772 | } | |
310ebbba | 773 | EXPORT_SYMBOL(ipmr_cache_free); |
a8c9486b | 774 | |
1da177e4 | 775 | /* Destroy an unresolved cache entry, killing queued skbs |
a8cb16dd | 776 | * and reporting error to netlink readers. |
1da177e4 | 777 | */ |
0c12295a | 778 | static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) |
1da177e4 | 779 | { |
8de53dfb | 780 | struct net *net = read_pnet(&mrt->net); |
1da177e4 | 781 | struct sk_buff *skb; |
9ef1d4c7 | 782 | struct nlmsgerr *e; |
1da177e4 | 783 | |
0c12295a | 784 | atomic_dec(&mrt->cache_resolve_queue_len); |
1da177e4 | 785 | |
c354e124 | 786 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) { |
eddc9ec5 | 787 | if (ip_hdr(skb)->version == 0) { |
af72868b JB |
788 | struct nlmsghdr *nlh = skb_pull(skb, |
789 | sizeof(struct iphdr)); | |
1da177e4 | 790 | nlh->nlmsg_type = NLMSG_ERROR; |
573ce260 | 791 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 792 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 793 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
794 | e->error = -ETIMEDOUT; |
795 | memset(&e->msg, 0, sizeof(e->msg)); | |
2942e900 | 796 | |
15e47304 | 797 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 798 | } else { |
1da177e4 | 799 | kfree_skb(skb); |
a8cb16dd | 800 | } |
1da177e4 LT |
801 | } |
802 | ||
5c0a66f5 | 803 | ipmr_cache_free(c); |
1da177e4 LT |
804 | } |
805 | ||
e258beb2 | 806 | /* Timer process for the unresolved queue. */ |
e258beb2 | 807 | static void ipmr_expire_process(unsigned long arg) |
1da177e4 | 808 | { |
0c12295a | 809 | struct mr_table *mrt = (struct mr_table *)arg; |
1da177e4 LT |
810 | unsigned long now; |
811 | unsigned long expires; | |
862465f2 | 812 | struct mfc_cache *c, *next; |
1da177e4 LT |
813 | |
814 | if (!spin_trylock(&mfc_unres_lock)) { | |
0c12295a | 815 | mod_timer(&mrt->ipmr_expire_timer, jiffies+HZ/10); |
1da177e4 LT |
816 | return; |
817 | } | |
818 | ||
0c12295a | 819 | if (list_empty(&mrt->mfc_unres_queue)) |
1da177e4 LT |
820 | goto out; |
821 | ||
822 | now = jiffies; | |
823 | expires = 10*HZ; | |
1da177e4 | 824 | |
0c12295a | 825 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
1da177e4 LT |
826 | if (time_after(c->mfc_un.unres.expires, now)) { |
827 | unsigned long interval = c->mfc_un.unres.expires - now; | |
828 | if (interval < expires) | |
829 | expires = interval; | |
1da177e4 LT |
830 | continue; |
831 | } | |
832 | ||
862465f2 | 833 | list_del(&c->list); |
8cd3ac9f | 834 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 835 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
836 | } |
837 | ||
0c12295a PM |
838 | if (!list_empty(&mrt->mfc_unres_queue)) |
839 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
1da177e4 LT |
840 | |
841 | out: | |
842 | spin_unlock(&mfc_unres_lock); | |
843 | } | |
844 | ||
845 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
0c12295a | 846 | static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache, |
d658f8a0 | 847 | unsigned char *ttls) |
1da177e4 LT |
848 | { |
849 | int vifi; | |
850 | ||
851 | cache->mfc_un.res.minvif = MAXVIFS; | |
852 | cache->mfc_un.res.maxvif = 0; | |
853 | memset(cache->mfc_un.res.ttls, 255, MAXVIFS); | |
854 | ||
0c12295a PM |
855 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
856 | if (VIF_EXISTS(mrt, vifi) && | |
cf958ae3 | 857 | ttls[vifi] && ttls[vifi] < 255) { |
1da177e4 LT |
858 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
859 | if (cache->mfc_un.res.minvif > vifi) | |
860 | cache->mfc_un.res.minvif = vifi; | |
861 | if (cache->mfc_un.res.maxvif <= vifi) | |
862 | cache->mfc_un.res.maxvif = vifi + 1; | |
863 | } | |
864 | } | |
90b5ca17 | 865 | cache->mfc_un.res.lastuse = jiffies; |
1da177e4 LT |
866 | } |
867 | ||
0c12295a PM |
868 | static int vif_add(struct net *net, struct mr_table *mrt, |
869 | struct vifctl *vifc, int mrtsock) | |
1da177e4 LT |
870 | { |
871 | int vifi = vifc->vifc_vifi; | |
5d8b3e69 YG |
872 | struct switchdev_attr attr = { |
873 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
874 | }; | |
0c12295a | 875 | struct vif_device *v = &mrt->vif_table[vifi]; |
1da177e4 LT |
876 | struct net_device *dev; |
877 | struct in_device *in_dev; | |
d607032d | 878 | int err; |
1da177e4 LT |
879 | |
880 | /* Is vif busy ? */ | |
0c12295a | 881 | if (VIF_EXISTS(mrt, vifi)) |
1da177e4 LT |
882 | return -EADDRINUSE; |
883 | ||
884 | switch (vifc->vifc_flags) { | |
1da177e4 | 885 | case VIFF_REGISTER: |
1973a4ea | 886 | if (!ipmr_pimsm_enabled()) |
c316c629 NA |
887 | return -EINVAL; |
888 | /* Special Purpose VIF in PIM | |
1da177e4 LT |
889 | * All the packets will be sent to the daemon |
890 | */ | |
0c12295a | 891 | if (mrt->mroute_reg_vif_num >= 0) |
1da177e4 | 892 | return -EADDRINUSE; |
f0ad0860 | 893 | dev = ipmr_reg_vif(net, mrt); |
1da177e4 LT |
894 | if (!dev) |
895 | return -ENOBUFS; | |
d607032d WC |
896 | err = dev_set_allmulti(dev, 1); |
897 | if (err) { | |
898 | unregister_netdevice(dev); | |
7dc00c82 | 899 | dev_put(dev); |
d607032d WC |
900 | return err; |
901 | } | |
1da177e4 | 902 | break; |
e905a9ed | 903 | case VIFF_TUNNEL: |
4feb88e5 | 904 | dev = ipmr_new_tunnel(net, vifc); |
1da177e4 LT |
905 | if (!dev) |
906 | return -ENOBUFS; | |
d607032d WC |
907 | err = dev_set_allmulti(dev, 1); |
908 | if (err) { | |
909 | ipmr_del_tunnel(dev, vifc); | |
7dc00c82 | 910 | dev_put(dev); |
d607032d WC |
911 | return err; |
912 | } | |
1da177e4 | 913 | break; |
ee5e81f0 | 914 | case VIFF_USE_IFINDEX: |
1da177e4 | 915 | case 0: |
ee5e81f0 I |
916 | if (vifc->vifc_flags == VIFF_USE_IFINDEX) { |
917 | dev = dev_get_by_index(net, vifc->vifc_lcl_ifindex); | |
51456b29 | 918 | if (dev && !__in_dev_get_rtnl(dev)) { |
ee5e81f0 I |
919 | dev_put(dev); |
920 | return -EADDRNOTAVAIL; | |
921 | } | |
a8cb16dd | 922 | } else { |
ee5e81f0 | 923 | dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr); |
a8cb16dd | 924 | } |
1da177e4 LT |
925 | if (!dev) |
926 | return -EADDRNOTAVAIL; | |
d607032d | 927 | err = dev_set_allmulti(dev, 1); |
7dc00c82 WC |
928 | if (err) { |
929 | dev_put(dev); | |
d607032d | 930 | return err; |
7dc00c82 | 931 | } |
1da177e4 LT |
932 | break; |
933 | default: | |
934 | return -EINVAL; | |
935 | } | |
936 | ||
a8cb16dd ED |
937 | in_dev = __in_dev_get_rtnl(dev); |
938 | if (!in_dev) { | |
d0490cfd | 939 | dev_put(dev); |
1da177e4 | 940 | return -EADDRNOTAVAIL; |
d0490cfd | 941 | } |
42f811b8 | 942 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; |
3b022865 DA |
943 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_MC_FORWARDING, |
944 | dev->ifindex, &in_dev->cnf); | |
1da177e4 LT |
945 | ip_rt_multicast_event(in_dev); |
946 | ||
a8cb16dd ED |
947 | /* Fill in the VIF structures */ |
948 | ||
5d8b3e69 YG |
949 | attr.orig_dev = dev; |
950 | if (!switchdev_port_attr_get(dev, &attr)) { | |
951 | memcpy(v->dev_parent_id.id, attr.u.ppid.id, attr.u.ppid.id_len); | |
952 | v->dev_parent_id.id_len = attr.u.ppid.id_len; | |
953 | } else { | |
954 | v->dev_parent_id.id_len = 0; | |
955 | } | |
c354e124 JK |
956 | v->rate_limit = vifc->vifc_rate_limit; |
957 | v->local = vifc->vifc_lcl_addr.s_addr; | |
958 | v->remote = vifc->vifc_rmt_addr.s_addr; | |
959 | v->flags = vifc->vifc_flags; | |
1da177e4 LT |
960 | if (!mrtsock) |
961 | v->flags |= VIFF_STATIC; | |
c354e124 | 962 | v->threshold = vifc->vifc_threshold; |
1da177e4 LT |
963 | v->bytes_in = 0; |
964 | v->bytes_out = 0; | |
965 | v->pkt_in = 0; | |
966 | v->pkt_out = 0; | |
967 | v->link = dev->ifindex; | |
a8cb16dd | 968 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER)) |
a54acb3a | 969 | v->link = dev_get_iflink(dev); |
1da177e4 LT |
970 | |
971 | /* And finish update writing critical data */ | |
972 | write_lock_bh(&mrt_lock); | |
c354e124 | 973 | v->dev = dev; |
a8cb16dd | 974 | if (v->flags & VIFF_REGISTER) |
0c12295a | 975 | mrt->mroute_reg_vif_num = vifi; |
0c12295a PM |
976 | if (vifi+1 > mrt->maxvif) |
977 | mrt->maxvif = vifi+1; | |
1da177e4 | 978 | write_unlock_bh(&mrt_lock); |
b362053a | 979 | call_ipmr_vif_entry_notifiers(net, FIB_EVENT_VIF_ADD, v, vifi, mrt->id); |
1da177e4 LT |
980 | return 0; |
981 | } | |
982 | ||
a8c9486b | 983 | /* called with rcu_read_lock() */ |
0c12295a | 984 | static struct mfc_cache *ipmr_cache_find(struct mr_table *mrt, |
4feb88e5 BT |
985 | __be32 origin, |
986 | __be32 mcastgrp) | |
1da177e4 | 987 | { |
8fb472c0 NA |
988 | struct mfc_cache_cmp_arg arg = { |
989 | .mfc_mcastgrp = mcastgrp, | |
990 | .mfc_origin = origin | |
991 | }; | |
992 | struct rhlist_head *tmp, *list; | |
1da177e4 LT |
993 | struct mfc_cache *c; |
994 | ||
8fb472c0 NA |
995 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
996 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
997 | return c; | |
998 | ||
862465f2 | 999 | return NULL; |
1da177e4 LT |
1000 | } |
1001 | ||
660b26dc ND |
1002 | /* Look for a (*,*,oif) entry */ |
1003 | static struct mfc_cache *ipmr_cache_find_any_parent(struct mr_table *mrt, | |
1004 | int vifi) | |
1005 | { | |
8fb472c0 NA |
1006 | struct mfc_cache_cmp_arg arg = { |
1007 | .mfc_mcastgrp = htonl(INADDR_ANY), | |
1008 | .mfc_origin = htonl(INADDR_ANY) | |
1009 | }; | |
1010 | struct rhlist_head *tmp, *list; | |
660b26dc ND |
1011 | struct mfc_cache *c; |
1012 | ||
8fb472c0 NA |
1013 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
1014 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
1015 | if (c->mfc_un.res.ttls[vifi] < 255) | |
660b26dc ND |
1016 | return c; |
1017 | ||
1018 | return NULL; | |
1019 | } | |
1020 | ||
1021 | /* Look for a (*,G) entry */ | |
1022 | static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt, | |
1023 | __be32 mcastgrp, int vifi) | |
1024 | { | |
8fb472c0 NA |
1025 | struct mfc_cache_cmp_arg arg = { |
1026 | .mfc_mcastgrp = mcastgrp, | |
1027 | .mfc_origin = htonl(INADDR_ANY) | |
1028 | }; | |
1029 | struct rhlist_head *tmp, *list; | |
660b26dc ND |
1030 | struct mfc_cache *c, *proxy; |
1031 | ||
360eb5da | 1032 | if (mcastgrp == htonl(INADDR_ANY)) |
660b26dc ND |
1033 | goto skip; |
1034 | ||
8fb472c0 NA |
1035 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); |
1036 | rhl_for_each_entry_rcu(c, tmp, list, mnode) { | |
1037 | if (c->mfc_un.res.ttls[vifi] < 255) | |
1038 | return c; | |
1039 | ||
1040 | /* It's ok if the vifi is part of the static tree */ | |
1041 | proxy = ipmr_cache_find_any_parent(mrt, c->mfc_parent); | |
1042 | if (proxy && proxy->mfc_un.res.ttls[vifi] < 255) | |
1043 | return c; | |
1044 | } | |
660b26dc ND |
1045 | |
1046 | skip: | |
1047 | return ipmr_cache_find_any_parent(mrt, vifi); | |
1048 | } | |
1049 | ||
8fb472c0 NA |
1050 | /* Look for a (S,G,iif) entry if parent != -1 */ |
1051 | static struct mfc_cache *ipmr_cache_find_parent(struct mr_table *mrt, | |
1052 | __be32 origin, __be32 mcastgrp, | |
1053 | int parent) | |
1054 | { | |
1055 | struct mfc_cache_cmp_arg arg = { | |
1056 | .mfc_mcastgrp = mcastgrp, | |
1057 | .mfc_origin = origin, | |
1058 | }; | |
1059 | struct rhlist_head *tmp, *list; | |
1060 | struct mfc_cache *c; | |
1061 | ||
1062 | list = rhltable_lookup(&mrt->mfc_hash, &arg, ipmr_rht_params); | |
1063 | rhl_for_each_entry_rcu(c, tmp, list, mnode) | |
1064 | if (parent == -1 || parent == c->mfc_parent) | |
1065 | return c; | |
1066 | ||
1067 | return NULL; | |
1068 | } | |
1069 | ||
7ef8f65d | 1070 | /* Allocate a multicast cache entry */ |
d658f8a0 | 1071 | static struct mfc_cache *ipmr_cache_alloc(void) |
1da177e4 | 1072 | { |
c354e124 | 1073 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
a8c9486b | 1074 | |
70a0dec4 TG |
1075 | if (c) { |
1076 | c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1; | |
a8c9486b | 1077 | c->mfc_un.res.minvif = MAXVIFS; |
310ebbba | 1078 | refcount_set(&c->mfc_un.res.refcount, 1); |
70a0dec4 | 1079 | } |
1da177e4 LT |
1080 | return c; |
1081 | } | |
1082 | ||
d658f8a0 | 1083 | static struct mfc_cache *ipmr_cache_alloc_unres(void) |
1da177e4 | 1084 | { |
c354e124 | 1085 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
a8c9486b ED |
1086 | |
1087 | if (c) { | |
1088 | skb_queue_head_init(&c->mfc_un.unres.unresolved); | |
1089 | c->mfc_un.unres.expires = jiffies + 10*HZ; | |
1090 | } | |
1da177e4 LT |
1091 | return c; |
1092 | } | |
1093 | ||
7ef8f65d | 1094 | /* A cache entry has gone into a resolved state from queued */ |
0c12295a PM |
1095 | static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt, |
1096 | struct mfc_cache *uc, struct mfc_cache *c) | |
1da177e4 LT |
1097 | { |
1098 | struct sk_buff *skb; | |
9ef1d4c7 | 1099 | struct nlmsgerr *e; |
1da177e4 | 1100 | |
a8cb16dd | 1101 | /* Play the pending entries through our router */ |
c354e124 | 1102 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
eddc9ec5 | 1103 | if (ip_hdr(skb)->version == 0) { |
af72868b JB |
1104 | struct nlmsghdr *nlh = skb_pull(skb, |
1105 | sizeof(struct iphdr)); | |
1da177e4 | 1106 | |
573ce260 | 1107 | if (__ipmr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
a8cb16dd ED |
1108 | nlh->nlmsg_len = skb_tail_pointer(skb) - |
1109 | (u8 *)nlh; | |
1da177e4 LT |
1110 | } else { |
1111 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 1112 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 1113 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 1114 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
1115 | e->error = -EMSGSIZE; |
1116 | memset(&e->msg, 0, sizeof(e->msg)); | |
1da177e4 | 1117 | } |
2942e900 | 1118 | |
15e47304 | 1119 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 1120 | } else { |
4b1f0d33 | 1121 | ip_mr_forward(net, mrt, skb->dev, skb, c, 0); |
a8cb16dd | 1122 | } |
1da177e4 LT |
1123 | } |
1124 | } | |
1125 | ||
5a645dd8 | 1126 | /* Bounce a cache query up to mrouted and netlink. |
1da177e4 | 1127 | * |
c316c629 | 1128 | * Called under mrt_lock. |
1da177e4 | 1129 | */ |
0c12295a | 1130 | static int ipmr_cache_report(struct mr_table *mrt, |
4feb88e5 | 1131 | struct sk_buff *pkt, vifi_t vifi, int assert) |
1da177e4 | 1132 | { |
c9bdd4b5 | 1133 | const int ihl = ip_hdrlen(pkt); |
c316c629 | 1134 | struct sock *mroute_sk; |
1da177e4 LT |
1135 | struct igmphdr *igmp; |
1136 | struct igmpmsg *msg; | |
c316c629 | 1137 | struct sk_buff *skb; |
1da177e4 LT |
1138 | int ret; |
1139 | ||
1da177e4 LT |
1140 | if (assert == IGMPMSG_WHOLEPKT) |
1141 | skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); | |
1142 | else | |
1da177e4 LT |
1143 | skb = alloc_skb(128, GFP_ATOMIC); |
1144 | ||
132adf54 | 1145 | if (!skb) |
1da177e4 LT |
1146 | return -ENOBUFS; |
1147 | ||
1da177e4 LT |
1148 | if (assert == IGMPMSG_WHOLEPKT) { |
1149 | /* Ugly, but we have no choice with this interface. | |
a8cb16dd ED |
1150 | * Duplicate old header, fix ihl, length etc. |
1151 | * And all this only to mangle msg->im_msgtype and | |
1152 | * to set msg->im_mbz to "mbz" :-) | |
1da177e4 | 1153 | */ |
878c8145 ACM |
1154 | skb_push(skb, sizeof(struct iphdr)); |
1155 | skb_reset_network_header(skb); | |
badff6d0 | 1156 | skb_reset_transport_header(skb); |
0272ffc4 | 1157 | msg = (struct igmpmsg *)skb_network_header(skb); |
d56f90a7 | 1158 | memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); |
1da177e4 LT |
1159 | msg->im_msgtype = IGMPMSG_WHOLEPKT; |
1160 | msg->im_mbz = 0; | |
0c12295a | 1161 | msg->im_vif = mrt->mroute_reg_vif_num; |
eddc9ec5 ACM |
1162 | ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; |
1163 | ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + | |
1164 | sizeof(struct iphdr)); | |
c316c629 NA |
1165 | } else { |
1166 | /* Copy the IP header */ | |
1167 | skb_set_network_header(skb, skb->len); | |
1168 | skb_put(skb, ihl); | |
1169 | skb_copy_to_linear_data(skb, pkt->data, ihl); | |
1170 | /* Flag to the kernel this is a route add */ | |
1171 | ip_hdr(skb)->protocol = 0; | |
1172 | msg = (struct igmpmsg *)skb_network_header(skb); | |
1173 | msg->im_vif = vifi; | |
1174 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); | |
1175 | /* Add our header */ | |
4df864c1 | 1176 | igmp = skb_put(skb, sizeof(struct igmphdr)); |
c316c629 NA |
1177 | igmp->type = assert; |
1178 | msg->im_msgtype = assert; | |
1179 | igmp->code = 0; | |
1180 | ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ | |
1181 | skb->transport_header = skb->network_header; | |
e905a9ed | 1182 | } |
1da177e4 | 1183 | |
4c968709 ED |
1184 | rcu_read_lock(); |
1185 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
51456b29 | 1186 | if (!mroute_sk) { |
4c968709 | 1187 | rcu_read_unlock(); |
1da177e4 LT |
1188 | kfree_skb(skb); |
1189 | return -EINVAL; | |
1190 | } | |
1191 | ||
5a645dd8 JG |
1192 | igmpmsg_netlink_event(mrt, skb); |
1193 | ||
a8cb16dd | 1194 | /* Deliver to mrouted */ |
4c968709 ED |
1195 | ret = sock_queue_rcv_skb(mroute_sk, skb); |
1196 | rcu_read_unlock(); | |
70a269e6 | 1197 | if (ret < 0) { |
e87cc472 | 1198 | net_warn_ratelimited("mroute: pending queue full, dropping entries\n"); |
1da177e4 LT |
1199 | kfree_skb(skb); |
1200 | } | |
1201 | ||
1202 | return ret; | |
1203 | } | |
1204 | ||
7ef8f65d NA |
1205 | /* Queue a packet for resolution. It gets locked cache entry! */ |
1206 | static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, | |
4b1f0d33 | 1207 | struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1208 | { |
8fb472c0 NA |
1209 | const struct iphdr *iph = ip_hdr(skb); |
1210 | struct mfc_cache *c; | |
862465f2 | 1211 | bool found = false; |
1da177e4 | 1212 | int err; |
1da177e4 LT |
1213 | |
1214 | spin_lock_bh(&mfc_unres_lock); | |
0c12295a | 1215 | list_for_each_entry(c, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1216 | if (c->mfc_mcastgrp == iph->daddr && |
862465f2 PM |
1217 | c->mfc_origin == iph->saddr) { |
1218 | found = true; | |
1da177e4 | 1219 | break; |
862465f2 | 1220 | } |
1da177e4 LT |
1221 | } |
1222 | ||
862465f2 | 1223 | if (!found) { |
a8cb16dd | 1224 | /* Create a new entry if allowable */ |
0c12295a | 1225 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
d658f8a0 | 1226 | (c = ipmr_cache_alloc_unres()) == NULL) { |
1da177e4 LT |
1227 | spin_unlock_bh(&mfc_unres_lock); |
1228 | ||
1229 | kfree_skb(skb); | |
1230 | return -ENOBUFS; | |
1231 | } | |
1232 | ||
a8cb16dd | 1233 | /* Fill in the new cache entry */ |
eddc9ec5 ACM |
1234 | c->mfc_parent = -1; |
1235 | c->mfc_origin = iph->saddr; | |
1236 | c->mfc_mcastgrp = iph->daddr; | |
1da177e4 | 1237 | |
a8cb16dd | 1238 | /* Reflect first query at mrouted. */ |
0c12295a | 1239 | err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE); |
4feb88e5 | 1240 | if (err < 0) { |
e905a9ed | 1241 | /* If the report failed throw the cache entry |
1da177e4 LT |
1242 | out - Brad Parker |
1243 | */ | |
1244 | spin_unlock_bh(&mfc_unres_lock); | |
1245 | ||
5c0a66f5 | 1246 | ipmr_cache_free(c); |
1da177e4 LT |
1247 | kfree_skb(skb); |
1248 | return err; | |
1249 | } | |
1250 | ||
0c12295a PM |
1251 | atomic_inc(&mrt->cache_resolve_queue_len); |
1252 | list_add(&c->list, &mrt->mfc_unres_queue); | |
8cd3ac9f | 1253 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 | 1254 | |
278554bd DM |
1255 | if (atomic_read(&mrt->cache_resolve_queue_len) == 1) |
1256 | mod_timer(&mrt->ipmr_expire_timer, c->mfc_un.unres.expires); | |
1da177e4 LT |
1257 | } |
1258 | ||
a8cb16dd | 1259 | /* See if we can append the packet */ |
a8cb16dd | 1260 | if (c->mfc_un.unres.unresolved.qlen > 3) { |
1da177e4 LT |
1261 | kfree_skb(skb); |
1262 | err = -ENOBUFS; | |
1263 | } else { | |
4b1f0d33 DS |
1264 | if (dev) { |
1265 | skb->dev = dev; | |
1266 | skb->skb_iif = dev->ifindex; | |
1267 | } | |
c354e124 | 1268 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); |
1da177e4 LT |
1269 | err = 0; |
1270 | } | |
1271 | ||
1272 | spin_unlock_bh(&mfc_unres_lock); | |
1273 | return err; | |
1274 | } | |
1275 | ||
7ef8f65d | 1276 | /* MFC cache manipulation by user space mroute daemon */ |
1da177e4 | 1277 | |
660b26dc | 1278 | static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent) |
1da177e4 | 1279 | { |
b362053a | 1280 | struct net *net = read_pnet(&mrt->net); |
8fb472c0 | 1281 | struct mfc_cache *c; |
1da177e4 | 1282 | |
8fb472c0 NA |
1283 | /* The entries are added/deleted only under RTNL */ |
1284 | rcu_read_lock(); | |
1285 | c = ipmr_cache_find_parent(mrt, mfc->mfcc_origin.s_addr, | |
1286 | mfc->mfcc_mcastgrp.s_addr, parent); | |
1287 | rcu_read_unlock(); | |
1288 | if (!c) | |
1289 | return -ENOENT; | |
1290 | rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params); | |
1291 | list_del_rcu(&c->list); | |
b362053a | 1292 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c, mrt->id); |
8fb472c0 | 1293 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
310ebbba | 1294 | ipmr_cache_put(c); |
1da177e4 | 1295 | |
8fb472c0 | 1296 | return 0; |
1da177e4 LT |
1297 | } |
1298 | ||
0c12295a | 1299 | static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, |
660b26dc | 1300 | struct mfcctl *mfc, int mrtsock, int parent) |
1da177e4 | 1301 | { |
862465f2 | 1302 | struct mfc_cache *uc, *c; |
8fb472c0 NA |
1303 | bool found; |
1304 | int ret; | |
1da177e4 | 1305 | |
a50436f2 PM |
1306 | if (mfc->mfcc_parent >= MAXVIFS) |
1307 | return -ENFILE; | |
1308 | ||
8fb472c0 NA |
1309 | /* The entries are added/deleted only under RTNL */ |
1310 | rcu_read_lock(); | |
1311 | c = ipmr_cache_find_parent(mrt, mfc->mfcc_origin.s_addr, | |
1312 | mfc->mfcc_mcastgrp.s_addr, parent); | |
1313 | rcu_read_unlock(); | |
1314 | if (c) { | |
1da177e4 LT |
1315 | write_lock_bh(&mrt_lock); |
1316 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1317 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1318 | if (!mrtsock) |
1319 | c->mfc_flags |= MFC_STATIC; | |
1320 | write_unlock_bh(&mrt_lock); | |
b362053a YG |
1321 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_REPLACE, c, |
1322 | mrt->id); | |
8cd3ac9f | 1323 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1324 | return 0; |
1325 | } | |
1326 | ||
360eb5da | 1327 | if (mfc->mfcc_mcastgrp.s_addr != htonl(INADDR_ANY) && |
660b26dc | 1328 | !ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) |
1da177e4 LT |
1329 | return -EINVAL; |
1330 | ||
d658f8a0 | 1331 | c = ipmr_cache_alloc(); |
51456b29 | 1332 | if (!c) |
1da177e4 LT |
1333 | return -ENOMEM; |
1334 | ||
c354e124 JK |
1335 | c->mfc_origin = mfc->mfcc_origin.s_addr; |
1336 | c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; | |
1337 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1338 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1339 | if (!mrtsock) |
1340 | c->mfc_flags |= MFC_STATIC; | |
1341 | ||
8fb472c0 NA |
1342 | ret = rhltable_insert_key(&mrt->mfc_hash, &c->cmparg, &c->mnode, |
1343 | ipmr_rht_params); | |
1344 | if (ret) { | |
1345 | pr_err("ipmr: rhtable insert error %d\n", ret); | |
1346 | ipmr_cache_free(c); | |
1347 | return ret; | |
1348 | } | |
1349 | list_add_tail_rcu(&c->list, &mrt->mfc_cache_list); | |
7ef8f65d NA |
1350 | /* Check to see if we resolved a queued list. If so we |
1351 | * need to send on the frames and tidy up. | |
1da177e4 | 1352 | */ |
b0ebb739 | 1353 | found = false; |
1da177e4 | 1354 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 1355 | list_for_each_entry(uc, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1356 | if (uc->mfc_origin == c->mfc_origin && |
1da177e4 | 1357 | uc->mfc_mcastgrp == c->mfc_mcastgrp) { |
862465f2 | 1358 | list_del(&uc->list); |
0c12295a | 1359 | atomic_dec(&mrt->cache_resolve_queue_len); |
b0ebb739 | 1360 | found = true; |
1da177e4 LT |
1361 | break; |
1362 | } | |
1363 | } | |
0c12295a PM |
1364 | if (list_empty(&mrt->mfc_unres_queue)) |
1365 | del_timer(&mrt->ipmr_expire_timer); | |
1da177e4 LT |
1366 | spin_unlock_bh(&mfc_unres_lock); |
1367 | ||
b0ebb739 | 1368 | if (found) { |
0c12295a | 1369 | ipmr_cache_resolve(net, mrt, uc, c); |
5c0a66f5 | 1370 | ipmr_cache_free(uc); |
1da177e4 | 1371 | } |
b362053a | 1372 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, c, mrt->id); |
8cd3ac9f | 1373 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1374 | return 0; |
1375 | } | |
1376 | ||
7ef8f65d | 1377 | /* Close the multicast socket, and clear the vif tables etc */ |
0e615e96 | 1378 | static void mroute_clean_tables(struct mr_table *mrt, bool all) |
1da177e4 | 1379 | { |
b362053a | 1380 | struct net *net = read_pnet(&mrt->net); |
8fb472c0 | 1381 | struct mfc_cache *c, *tmp; |
d17fa6fa | 1382 | LIST_HEAD(list); |
8fb472c0 | 1383 | int i; |
e905a9ed | 1384 | |
a8cb16dd | 1385 | /* Shut down all active vif entries */ |
0c12295a | 1386 | for (i = 0; i < mrt->maxvif; i++) { |
0e615e96 NA |
1387 | if (!all && (mrt->vif_table[i].flags & VIFF_STATIC)) |
1388 | continue; | |
1389 | vif_delete(mrt, i, 0, &list); | |
1da177e4 | 1390 | } |
d17fa6fa | 1391 | unregister_netdevice_many(&list); |
1da177e4 | 1392 | |
a8cb16dd | 1393 | /* Wipe the cache */ |
8fb472c0 NA |
1394 | list_for_each_entry_safe(c, tmp, &mrt->mfc_cache_list, list) { |
1395 | if (!all && (c->mfc_flags & MFC_STATIC)) | |
1396 | continue; | |
1397 | rhltable_remove(&mrt->mfc_hash, &c->mnode, ipmr_rht_params); | |
1398 | list_del_rcu(&c->list); | |
b362053a YG |
1399 | call_ipmr_mfc_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, c, |
1400 | mrt->id); | |
8fb472c0 | 1401 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
310ebbba | 1402 | ipmr_cache_put(c); |
1da177e4 LT |
1403 | } |
1404 | ||
0c12295a | 1405 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
1da177e4 | 1406 | spin_lock_bh(&mfc_unres_lock); |
8fb472c0 | 1407 | list_for_each_entry_safe(c, tmp, &mrt->mfc_unres_queue, list) { |
862465f2 | 1408 | list_del(&c->list); |
8cd3ac9f | 1409 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 1410 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
1411 | } |
1412 | spin_unlock_bh(&mfc_unres_lock); | |
1413 | } | |
1414 | } | |
1415 | ||
4c968709 ED |
1416 | /* called from ip_ra_control(), before an RCU grace period, |
1417 | * we dont need to call synchronize_rcu() here | |
1418 | */ | |
1da177e4 LT |
1419 | static void mrtsock_destruct(struct sock *sk) |
1420 | { | |
4feb88e5 | 1421 | struct net *net = sock_net(sk); |
f0ad0860 | 1422 | struct mr_table *mrt; |
4feb88e5 | 1423 | |
1215e51e | 1424 | ASSERT_RTNL(); |
f0ad0860 | 1425 | ipmr_for_each_table(mrt, net) { |
4c968709 | 1426 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
f0ad0860 | 1427 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)--; |
3b022865 DA |
1428 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1429 | NETCONFA_MC_FORWARDING, | |
d67b8c61 ND |
1430 | NETCONFA_IFINDEX_ALL, |
1431 | net->ipv4.devconf_all); | |
a9b3cd7f | 1432 | RCU_INIT_POINTER(mrt->mroute_sk, NULL); |
0e615e96 | 1433 | mroute_clean_tables(mrt, false); |
f0ad0860 | 1434 | } |
1da177e4 | 1435 | } |
1da177e4 LT |
1436 | } |
1437 | ||
7ef8f65d NA |
1438 | /* Socket options and virtual interface manipulation. The whole |
1439 | * virtual interface system is a complete heap, but unfortunately | |
1440 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1441 | * MOSPF/PIM router set up we can clean this up. | |
1da177e4 | 1442 | */ |
e905a9ed | 1443 | |
29e97d21 NA |
1444 | int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, |
1445 | unsigned int optlen) | |
1da177e4 | 1446 | { |
4feb88e5 | 1447 | struct net *net = sock_net(sk); |
29e97d21 | 1448 | int val, ret = 0, parent = 0; |
f0ad0860 | 1449 | struct mr_table *mrt; |
29e97d21 NA |
1450 | struct vifctl vif; |
1451 | struct mfcctl mfc; | |
1452 | u32 uval; | |
f0ad0860 | 1453 | |
29e97d21 NA |
1454 | /* There's one exception to the lock - MRT_DONE which needs to unlock */ |
1455 | rtnl_lock(); | |
5e1859fb | 1456 | if (sk->sk_type != SOCK_RAW || |
29e97d21 NA |
1457 | inet_sk(sk)->inet_num != IPPROTO_IGMP) { |
1458 | ret = -EOPNOTSUPP; | |
1459 | goto out_unlock; | |
1460 | } | |
5e1859fb | 1461 | |
f0ad0860 | 1462 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
29e97d21 NA |
1463 | if (!mrt) { |
1464 | ret = -ENOENT; | |
1465 | goto out_unlock; | |
1466 | } | |
132adf54 | 1467 | if (optname != MRT_INIT) { |
33d480ce | 1468 | if (sk != rcu_access_pointer(mrt->mroute_sk) && |
29e97d21 NA |
1469 | !ns_capable(net->user_ns, CAP_NET_ADMIN)) { |
1470 | ret = -EACCES; | |
1471 | goto out_unlock; | |
1472 | } | |
1da177e4 LT |
1473 | } |
1474 | ||
132adf54 SH |
1475 | switch (optname) { |
1476 | case MRT_INIT: | |
42e6b89c | 1477 | if (optlen != sizeof(int)) { |
29e97d21 | 1478 | ret = -EINVAL; |
42e6b89c NA |
1479 | break; |
1480 | } | |
1481 | if (rtnl_dereference(mrt->mroute_sk)) { | |
29e97d21 | 1482 | ret = -EADDRINUSE; |
29e97d21 | 1483 | break; |
42e6b89c | 1484 | } |
132adf54 SH |
1485 | |
1486 | ret = ip_ra_control(sk, 1, mrtsock_destruct); | |
1487 | if (ret == 0) { | |
cf778b00 | 1488 | rcu_assign_pointer(mrt->mroute_sk, sk); |
4feb88e5 | 1489 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)++; |
3b022865 DA |
1490 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
1491 | NETCONFA_MC_FORWARDING, | |
d67b8c61 ND |
1492 | NETCONFA_IFINDEX_ALL, |
1493 | net->ipv4.devconf_all); | |
132adf54 | 1494 | } |
29e97d21 | 1495 | break; |
132adf54 | 1496 | case MRT_DONE: |
29e97d21 NA |
1497 | if (sk != rcu_access_pointer(mrt->mroute_sk)) { |
1498 | ret = -EACCES; | |
1499 | } else { | |
29e97d21 | 1500 | ret = ip_ra_control(sk, 0, NULL); |
1215e51e | 1501 | goto out_unlock; |
29e97d21 NA |
1502 | } |
1503 | break; | |
132adf54 SH |
1504 | case MRT_ADD_VIF: |
1505 | case MRT_DEL_VIF: | |
29e97d21 NA |
1506 | if (optlen != sizeof(vif)) { |
1507 | ret = -EINVAL; | |
1508 | break; | |
1509 | } | |
1510 | if (copy_from_user(&vif, optval, sizeof(vif))) { | |
1511 | ret = -EFAULT; | |
1512 | break; | |
1513 | } | |
1514 | if (vif.vifc_vifi >= MAXVIFS) { | |
1515 | ret = -ENFILE; | |
1516 | break; | |
1517 | } | |
c354e124 | 1518 | if (optname == MRT_ADD_VIF) { |
4c968709 ED |
1519 | ret = vif_add(net, mrt, &vif, |
1520 | sk == rtnl_dereference(mrt->mroute_sk)); | |
132adf54 | 1521 | } else { |
0c12295a | 1522 | ret = vif_delete(mrt, vif.vifc_vifi, 0, NULL); |
132adf54 | 1523 | } |
29e97d21 | 1524 | break; |
7ef8f65d NA |
1525 | /* Manipulate the forwarding caches. These live |
1526 | * in a sort of kernel/user symbiosis. | |
1527 | */ | |
132adf54 SH |
1528 | case MRT_ADD_MFC: |
1529 | case MRT_DEL_MFC: | |
660b26dc | 1530 | parent = -1; |
fcfd6dfa | 1531 | /* fall through */ |
660b26dc ND |
1532 | case MRT_ADD_MFC_PROXY: |
1533 | case MRT_DEL_MFC_PROXY: | |
29e97d21 NA |
1534 | if (optlen != sizeof(mfc)) { |
1535 | ret = -EINVAL; | |
1536 | break; | |
1537 | } | |
1538 | if (copy_from_user(&mfc, optval, sizeof(mfc))) { | |
1539 | ret = -EFAULT; | |
1540 | break; | |
1541 | } | |
660b26dc ND |
1542 | if (parent == 0) |
1543 | parent = mfc.mfcc_parent; | |
660b26dc ND |
1544 | if (optname == MRT_DEL_MFC || optname == MRT_DEL_MFC_PROXY) |
1545 | ret = ipmr_mfc_delete(mrt, &mfc, parent); | |
132adf54 | 1546 | else |
4c968709 | 1547 | ret = ipmr_mfc_add(net, mrt, &mfc, |
660b26dc ND |
1548 | sk == rtnl_dereference(mrt->mroute_sk), |
1549 | parent); | |
29e97d21 | 1550 | break; |
7ef8f65d | 1551 | /* Control PIM assert. */ |
132adf54 | 1552 | case MRT_ASSERT: |
29e97d21 NA |
1553 | if (optlen != sizeof(val)) { |
1554 | ret = -EINVAL; | |
1555 | break; | |
1556 | } | |
1557 | if (get_user(val, (int __user *)optval)) { | |
1558 | ret = -EFAULT; | |
1559 | break; | |
1560 | } | |
1561 | mrt->mroute_do_assert = val; | |
1562 | break; | |
132adf54 | 1563 | case MRT_PIM: |
1973a4ea | 1564 | if (!ipmr_pimsm_enabled()) { |
29e97d21 NA |
1565 | ret = -ENOPROTOOPT; |
1566 | break; | |
1567 | } | |
1568 | if (optlen != sizeof(val)) { | |
1569 | ret = -EINVAL; | |
1570 | break; | |
1571 | } | |
1572 | if (get_user(val, (int __user *)optval)) { | |
1573 | ret = -EFAULT; | |
1574 | break; | |
1575 | } | |
ba93ef74 | 1576 | |
29e97d21 NA |
1577 | val = !!val; |
1578 | if (val != mrt->mroute_do_pim) { | |
1579 | mrt->mroute_do_pim = val; | |
1580 | mrt->mroute_do_assert = val; | |
1da177e4 | 1581 | } |
29e97d21 | 1582 | break; |
f0ad0860 | 1583 | case MRT_TABLE: |
29e97d21 NA |
1584 | if (!IS_BUILTIN(CONFIG_IP_MROUTE_MULTIPLE_TABLES)) { |
1585 | ret = -ENOPROTOOPT; | |
1586 | break; | |
1587 | } | |
1588 | if (optlen != sizeof(uval)) { | |
1589 | ret = -EINVAL; | |
1590 | break; | |
1591 | } | |
1592 | if (get_user(uval, (u32 __user *)optval)) { | |
1593 | ret = -EFAULT; | |
1594 | break; | |
1595 | } | |
f0ad0860 | 1596 | |
4c968709 ED |
1597 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
1598 | ret = -EBUSY; | |
1599 | } else { | |
29e97d21 | 1600 | mrt = ipmr_new_table(net, uval); |
1113ebbc NA |
1601 | if (IS_ERR(mrt)) |
1602 | ret = PTR_ERR(mrt); | |
5e1859fb | 1603 | else |
29e97d21 | 1604 | raw_sk(sk)->ipmr_table = uval; |
4c968709 | 1605 | } |
29e97d21 | 1606 | break; |
7ef8f65d | 1607 | /* Spurious command, or MRT_VERSION which you cannot set. */ |
132adf54 | 1608 | default: |
29e97d21 | 1609 | ret = -ENOPROTOOPT; |
1da177e4 | 1610 | } |
29e97d21 NA |
1611 | out_unlock: |
1612 | rtnl_unlock(); | |
29e97d21 | 1613 | return ret; |
1da177e4 LT |
1614 | } |
1615 | ||
7ef8f65d | 1616 | /* Getsock opt support for the multicast routing system. */ |
c354e124 | 1617 | int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
1618 | { |
1619 | int olr; | |
1620 | int val; | |
4feb88e5 | 1621 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1622 | struct mr_table *mrt; |
1623 | ||
5e1859fb ED |
1624 | if (sk->sk_type != SOCK_RAW || |
1625 | inet_sk(sk)->inet_num != IPPROTO_IGMP) | |
1626 | return -EOPNOTSUPP; | |
1627 | ||
f0ad0860 | 1628 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
51456b29 | 1629 | if (!mrt) |
f0ad0860 | 1630 | return -ENOENT; |
1da177e4 | 1631 | |
fe9ef3ce NA |
1632 | switch (optname) { |
1633 | case MRT_VERSION: | |
1634 | val = 0x0305; | |
1635 | break; | |
1636 | case MRT_PIM: | |
1973a4ea | 1637 | if (!ipmr_pimsm_enabled()) |
fe9ef3ce NA |
1638 | return -ENOPROTOOPT; |
1639 | val = mrt->mroute_do_pim; | |
1640 | break; | |
1641 | case MRT_ASSERT: | |
1642 | val = mrt->mroute_do_assert; | |
1643 | break; | |
1644 | default: | |
1da177e4 | 1645 | return -ENOPROTOOPT; |
fe9ef3ce | 1646 | } |
1da177e4 LT |
1647 | |
1648 | if (get_user(olr, optlen)) | |
1649 | return -EFAULT; | |
1da177e4 LT |
1650 | olr = min_t(unsigned int, olr, sizeof(int)); |
1651 | if (olr < 0) | |
1652 | return -EINVAL; | |
c354e124 | 1653 | if (put_user(olr, optlen)) |
1da177e4 | 1654 | return -EFAULT; |
c354e124 | 1655 | if (copy_to_user(optval, &val, olr)) |
1da177e4 LT |
1656 | return -EFAULT; |
1657 | return 0; | |
1658 | } | |
1659 | ||
7ef8f65d | 1660 | /* The IP multicast ioctl support routines. */ |
1da177e4 LT |
1661 | int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) |
1662 | { | |
1663 | struct sioc_sg_req sr; | |
1664 | struct sioc_vif_req vr; | |
1665 | struct vif_device *vif; | |
1666 | struct mfc_cache *c; | |
4feb88e5 | 1667 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1668 | struct mr_table *mrt; |
1669 | ||
1670 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1671 | if (!mrt) |
f0ad0860 | 1672 | return -ENOENT; |
e905a9ed | 1673 | |
132adf54 SH |
1674 | switch (cmd) { |
1675 | case SIOCGETVIFCNT: | |
c354e124 | 1676 | if (copy_from_user(&vr, arg, sizeof(vr))) |
132adf54 | 1677 | return -EFAULT; |
0c12295a | 1678 | if (vr.vifi >= mrt->maxvif) |
132adf54 SH |
1679 | return -EINVAL; |
1680 | read_lock(&mrt_lock); | |
0c12295a PM |
1681 | vif = &mrt->vif_table[vr.vifi]; |
1682 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
c354e124 JK |
1683 | vr.icount = vif->pkt_in; |
1684 | vr.ocount = vif->pkt_out; | |
1685 | vr.ibytes = vif->bytes_in; | |
1686 | vr.obytes = vif->bytes_out; | |
1da177e4 | 1687 | read_unlock(&mrt_lock); |
1da177e4 | 1688 | |
c354e124 | 1689 | if (copy_to_user(arg, &vr, sizeof(vr))) |
132adf54 SH |
1690 | return -EFAULT; |
1691 | return 0; | |
1692 | } | |
1693 | read_unlock(&mrt_lock); | |
1694 | return -EADDRNOTAVAIL; | |
1695 | case SIOCGETSGCNT: | |
c354e124 | 1696 | if (copy_from_user(&sr, arg, sizeof(sr))) |
132adf54 SH |
1697 | return -EFAULT; |
1698 | ||
a8c9486b | 1699 | rcu_read_lock(); |
0c12295a | 1700 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); |
132adf54 SH |
1701 | if (c) { |
1702 | sr.pktcnt = c->mfc_un.res.pkt; | |
1703 | sr.bytecnt = c->mfc_un.res.bytes; | |
1704 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
a8c9486b | 1705 | rcu_read_unlock(); |
132adf54 | 1706 | |
c354e124 | 1707 | if (copy_to_user(arg, &sr, sizeof(sr))) |
132adf54 SH |
1708 | return -EFAULT; |
1709 | return 0; | |
1710 | } | |
a8c9486b | 1711 | rcu_read_unlock(); |
132adf54 SH |
1712 | return -EADDRNOTAVAIL; |
1713 | default: | |
1714 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1715 | } |
1716 | } | |
1717 | ||
709b46e8 EB |
1718 | #ifdef CONFIG_COMPAT |
1719 | struct compat_sioc_sg_req { | |
1720 | struct in_addr src; | |
1721 | struct in_addr grp; | |
1722 | compat_ulong_t pktcnt; | |
1723 | compat_ulong_t bytecnt; | |
1724 | compat_ulong_t wrong_if; | |
1725 | }; | |
1726 | ||
ca6b8bb0 DM |
1727 | struct compat_sioc_vif_req { |
1728 | vifi_t vifi; /* Which iface */ | |
1729 | compat_ulong_t icount; | |
1730 | compat_ulong_t ocount; | |
1731 | compat_ulong_t ibytes; | |
1732 | compat_ulong_t obytes; | |
1733 | }; | |
1734 | ||
709b46e8 EB |
1735 | int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
1736 | { | |
0033d5ad | 1737 | struct compat_sioc_sg_req sr; |
ca6b8bb0 DM |
1738 | struct compat_sioc_vif_req vr; |
1739 | struct vif_device *vif; | |
709b46e8 EB |
1740 | struct mfc_cache *c; |
1741 | struct net *net = sock_net(sk); | |
1742 | struct mr_table *mrt; | |
1743 | ||
1744 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1745 | if (!mrt) |
709b46e8 EB |
1746 | return -ENOENT; |
1747 | ||
1748 | switch (cmd) { | |
ca6b8bb0 DM |
1749 | case SIOCGETVIFCNT: |
1750 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1751 | return -EFAULT; | |
1752 | if (vr.vifi >= mrt->maxvif) | |
1753 | return -EINVAL; | |
1754 | read_lock(&mrt_lock); | |
1755 | vif = &mrt->vif_table[vr.vifi]; | |
1756 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
1757 | vr.icount = vif->pkt_in; | |
1758 | vr.ocount = vif->pkt_out; | |
1759 | vr.ibytes = vif->bytes_in; | |
1760 | vr.obytes = vif->bytes_out; | |
1761 | read_unlock(&mrt_lock); | |
1762 | ||
1763 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1764 | return -EFAULT; | |
1765 | return 0; | |
1766 | } | |
1767 | read_unlock(&mrt_lock); | |
1768 | return -EADDRNOTAVAIL; | |
709b46e8 EB |
1769 | case SIOCGETSGCNT: |
1770 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1771 | return -EFAULT; | |
1772 | ||
1773 | rcu_read_lock(); | |
1774 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); | |
1775 | if (c) { | |
1776 | sr.pktcnt = c->mfc_un.res.pkt; | |
1777 | sr.bytecnt = c->mfc_un.res.bytes; | |
1778 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1779 | rcu_read_unlock(); | |
1780 | ||
1781 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1782 | return -EFAULT; | |
1783 | return 0; | |
1784 | } | |
1785 | rcu_read_unlock(); | |
1786 | return -EADDRNOTAVAIL; | |
1787 | default: | |
1788 | return -ENOIOCTLCMD; | |
1789 | } | |
1790 | } | |
1791 | #endif | |
1792 | ||
1da177e4 LT |
1793 | static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
1794 | { | |
351638e7 | 1795 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4feb88e5 | 1796 | struct net *net = dev_net(dev); |
f0ad0860 | 1797 | struct mr_table *mrt; |
1da177e4 LT |
1798 | struct vif_device *v; |
1799 | int ct; | |
e9dc8653 | 1800 | |
1da177e4 LT |
1801 | if (event != NETDEV_UNREGISTER) |
1802 | return NOTIFY_DONE; | |
f0ad0860 PM |
1803 | |
1804 | ipmr_for_each_table(mrt, net) { | |
1805 | v = &mrt->vif_table[0]; | |
1806 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1807 | if (v->dev == dev) | |
e92036a6 | 1808 | vif_delete(mrt, ct, 1, NULL); |
f0ad0860 | 1809 | } |
1da177e4 LT |
1810 | } |
1811 | return NOTIFY_DONE; | |
1812 | } | |
1813 | ||
c354e124 | 1814 | static struct notifier_block ip_mr_notifier = { |
1da177e4 LT |
1815 | .notifier_call = ipmr_device_event, |
1816 | }; | |
1817 | ||
7ef8f65d NA |
1818 | /* Encapsulate a packet by attaching a valid IPIP header to it. |
1819 | * This avoids tunnel drivers and other mess and gives us the speed so | |
1820 | * important for multicast video. | |
1da177e4 | 1821 | */ |
b6a7719a HFS |
1822 | static void ip_encap(struct net *net, struct sk_buff *skb, |
1823 | __be32 saddr, __be32 daddr) | |
1da177e4 | 1824 | { |
8856dfa3 | 1825 | struct iphdr *iph; |
b71d1d42 | 1826 | const struct iphdr *old_iph = ip_hdr(skb); |
8856dfa3 ACM |
1827 | |
1828 | skb_push(skb, sizeof(struct iphdr)); | |
b0e380b1 | 1829 | skb->transport_header = skb->network_header; |
8856dfa3 | 1830 | skb_reset_network_header(skb); |
eddc9ec5 | 1831 | iph = ip_hdr(skb); |
1da177e4 | 1832 | |
a8cb16dd | 1833 | iph->version = 4; |
e023dd64 ACM |
1834 | iph->tos = old_iph->tos; |
1835 | iph->ttl = old_iph->ttl; | |
1da177e4 LT |
1836 | iph->frag_off = 0; |
1837 | iph->daddr = daddr; | |
1838 | iph->saddr = saddr; | |
1839 | iph->protocol = IPPROTO_IPIP; | |
1840 | iph->ihl = 5; | |
1841 | iph->tot_len = htons(skb->len); | |
b6a7719a | 1842 | ip_select_ident(net, skb, NULL); |
1da177e4 LT |
1843 | ip_send_check(iph); |
1844 | ||
1da177e4 LT |
1845 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
1846 | nf_reset(skb); | |
1847 | } | |
1848 | ||
0c4b51f0 EB |
1849 | static inline int ipmr_forward_finish(struct net *net, struct sock *sk, |
1850 | struct sk_buff *skb) | |
1da177e4 | 1851 | { |
a8cb16dd | 1852 | struct ip_options *opt = &(IPCB(skb)->opt); |
1da177e4 | 1853 | |
73186df8 DM |
1854 | IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS); |
1855 | IP_ADD_STATS(net, IPSTATS_MIB_OUTOCTETS, skb->len); | |
1da177e4 LT |
1856 | |
1857 | if (unlikely(opt->optlen)) | |
1858 | ip_forward_options(skb); | |
1859 | ||
13206b6b | 1860 | return dst_output(net, sk, skb); |
1da177e4 LT |
1861 | } |
1862 | ||
a5bc9294 YG |
1863 | #ifdef CONFIG_NET_SWITCHDEV |
1864 | static bool ipmr_forward_offloaded(struct sk_buff *skb, struct mr_table *mrt, | |
1865 | int in_vifi, int out_vifi) | |
1866 | { | |
1867 | struct vif_device *out_vif = &mrt->vif_table[out_vifi]; | |
1868 | struct vif_device *in_vif = &mrt->vif_table[in_vifi]; | |
1869 | ||
1870 | if (!skb->offload_mr_fwd_mark) | |
1871 | return false; | |
1872 | if (!out_vif->dev_parent_id.id_len || !in_vif->dev_parent_id.id_len) | |
1873 | return false; | |
1874 | return netdev_phys_item_id_same(&out_vif->dev_parent_id, | |
1875 | &in_vif->dev_parent_id); | |
1876 | } | |
1877 | #else | |
1878 | static bool ipmr_forward_offloaded(struct sk_buff *skb, struct mr_table *mrt, | |
1879 | int in_vifi, int out_vifi) | |
1880 | { | |
1881 | return false; | |
1882 | } | |
1883 | #endif | |
1884 | ||
7ef8f65d | 1885 | /* Processing handlers for ipmr_forward */ |
1da177e4 | 1886 | |
0c12295a | 1887 | static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt, |
a5bc9294 YG |
1888 | int in_vifi, struct sk_buff *skb, |
1889 | struct mfc_cache *c, int vifi) | |
1da177e4 | 1890 | { |
eddc9ec5 | 1891 | const struct iphdr *iph = ip_hdr(skb); |
0c12295a | 1892 | struct vif_device *vif = &mrt->vif_table[vifi]; |
1da177e4 LT |
1893 | struct net_device *dev; |
1894 | struct rtable *rt; | |
31e4543d | 1895 | struct flowi4 fl4; |
1da177e4 LT |
1896 | int encap = 0; |
1897 | ||
51456b29 | 1898 | if (!vif->dev) |
1da177e4 LT |
1899 | goto out_free; |
1900 | ||
1da177e4 LT |
1901 | if (vif->flags & VIFF_REGISTER) { |
1902 | vif->pkt_out++; | |
c354e124 | 1903 | vif->bytes_out += skb->len; |
cf3677ae PE |
1904 | vif->dev->stats.tx_bytes += skb->len; |
1905 | vif->dev->stats.tx_packets++; | |
0c12295a | 1906 | ipmr_cache_report(mrt, skb, vifi, IGMPMSG_WHOLEPKT); |
69ebbf58 | 1907 | goto out_free; |
1da177e4 | 1908 | } |
1da177e4 | 1909 | |
a5bc9294 YG |
1910 | if (ipmr_forward_offloaded(skb, mrt, in_vifi, vifi)) |
1911 | goto out_free; | |
1912 | ||
a8cb16dd | 1913 | if (vif->flags & VIFF_TUNNEL) { |
31e4543d | 1914 | rt = ip_route_output_ports(net, &fl4, NULL, |
78fbfd8a DM |
1915 | vif->remote, vif->local, |
1916 | 0, 0, | |
1917 | IPPROTO_IPIP, | |
1918 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1919 | if (IS_ERR(rt)) |
1da177e4 LT |
1920 | goto out_free; |
1921 | encap = sizeof(struct iphdr); | |
1922 | } else { | |
31e4543d | 1923 | rt = ip_route_output_ports(net, &fl4, NULL, iph->daddr, 0, |
78fbfd8a DM |
1924 | 0, 0, |
1925 | IPPROTO_IPIP, | |
1926 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1927 | if (IS_ERR(rt)) |
1da177e4 LT |
1928 | goto out_free; |
1929 | } | |
1930 | ||
d8d1f30b | 1931 | dev = rt->dst.dev; |
1da177e4 | 1932 | |
d8d1f30b | 1933 | if (skb->len+encap > dst_mtu(&rt->dst) && (ntohs(iph->frag_off) & IP_DF)) { |
1da177e4 | 1934 | /* Do not fragment multicasts. Alas, IPv4 does not |
a8cb16dd ED |
1935 | * allow to send ICMP, so that packets will disappear |
1936 | * to blackhole. | |
1da177e4 | 1937 | */ |
73186df8 | 1938 | IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS); |
1da177e4 LT |
1939 | ip_rt_put(rt); |
1940 | goto out_free; | |
1941 | } | |
1942 | ||
d8d1f30b | 1943 | encap += LL_RESERVED_SPACE(dev) + rt->dst.header_len; |
1da177e4 LT |
1944 | |
1945 | if (skb_cow(skb, encap)) { | |
e905a9ed | 1946 | ip_rt_put(rt); |
1da177e4 LT |
1947 | goto out_free; |
1948 | } | |
1949 | ||
1950 | vif->pkt_out++; | |
c354e124 | 1951 | vif->bytes_out += skb->len; |
1da177e4 | 1952 | |
adf30907 | 1953 | skb_dst_drop(skb); |
d8d1f30b | 1954 | skb_dst_set(skb, &rt->dst); |
eddc9ec5 | 1955 | ip_decrease_ttl(ip_hdr(skb)); |
1da177e4 LT |
1956 | |
1957 | /* FIXME: forward and output firewalls used to be called here. | |
a8cb16dd ED |
1958 | * What do we do with netfilter? -- RR |
1959 | */ | |
1da177e4 | 1960 | if (vif->flags & VIFF_TUNNEL) { |
b6a7719a | 1961 | ip_encap(net, skb, vif->local, vif->remote); |
1da177e4 | 1962 | /* FIXME: extra output firewall step used to be here. --RR */ |
2f4c02d4 PE |
1963 | vif->dev->stats.tx_packets++; |
1964 | vif->dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1965 | } |
1966 | ||
9ee6c5dc | 1967 | IPCB(skb)->flags |= IPSKB_FORWARDED; |
1da177e4 | 1968 | |
7ef8f65d | 1969 | /* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally |
1da177e4 LT |
1970 | * not only before forwarding, but after forwarding on all output |
1971 | * interfaces. It is clear, if mrouter runs a multicasting | |
1972 | * program, it should receive packets not depending to what interface | |
1973 | * program is joined. | |
1974 | * If we will not make it, the program will have to join on all | |
1975 | * interfaces. On the other hand, multihoming host (or router, but | |
1976 | * not mrouter) cannot join to more than one interface - it will | |
1977 | * result in receiving multiple packets. | |
1978 | */ | |
29a26a56 EB |
1979 | NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, |
1980 | net, NULL, skb, skb->dev, dev, | |
1da177e4 LT |
1981 | ipmr_forward_finish); |
1982 | return; | |
1983 | ||
1984 | out_free: | |
1985 | kfree_skb(skb); | |
1da177e4 LT |
1986 | } |
1987 | ||
0c12295a | 1988 | static int ipmr_find_vif(struct mr_table *mrt, struct net_device *dev) |
1da177e4 LT |
1989 | { |
1990 | int ct; | |
0c12295a PM |
1991 | |
1992 | for (ct = mrt->maxvif-1; ct >= 0; ct--) { | |
1993 | if (mrt->vif_table[ct].dev == dev) | |
1da177e4 LT |
1994 | break; |
1995 | } | |
1996 | return ct; | |
1997 | } | |
1998 | ||
1999 | /* "local" means that we should preserve one skb (for local delivery) */ | |
c4854ec8 | 2000 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
4b1f0d33 DS |
2001 | struct net_device *dev, struct sk_buff *skb, |
2002 | struct mfc_cache *cache, int local) | |
1da177e4 | 2003 | { |
4b1f0d33 | 2004 | int true_vifi = ipmr_find_vif(mrt, dev); |
1da177e4 LT |
2005 | int psend = -1; |
2006 | int vif, ct; | |
2007 | ||
2008 | vif = cache->mfc_parent; | |
2009 | cache->mfc_un.res.pkt++; | |
2010 | cache->mfc_un.res.bytes += skb->len; | |
43b9e127 | 2011 | cache->mfc_un.res.lastuse = jiffies; |
1da177e4 | 2012 | |
360eb5da | 2013 | if (cache->mfc_origin == htonl(INADDR_ANY) && true_vifi >= 0) { |
660b26dc ND |
2014 | struct mfc_cache *cache_proxy; |
2015 | ||
2016 | /* For an (*,G) entry, we only check that the incomming | |
2017 | * interface is part of the static tree. | |
2018 | */ | |
2019 | cache_proxy = ipmr_cache_find_any_parent(mrt, vif); | |
2020 | if (cache_proxy && | |
2021 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
2022 | goto forward; | |
2023 | } | |
2024 | ||
7ef8f65d | 2025 | /* Wrong interface: drop packet and (maybe) send PIM assert. */ |
4b1f0d33 | 2026 | if (mrt->vif_table[vif].dev != dev) { |
c7537967 | 2027 | if (rt_is_output_route(skb_rtable(skb))) { |
1da177e4 | 2028 | /* It is our own packet, looped back. |
a8cb16dd ED |
2029 | * Very complicated situation... |
2030 | * | |
2031 | * The best workaround until routing daemons will be | |
2032 | * fixed is not to redistribute packet, if it was | |
2033 | * send through wrong interface. It means, that | |
2034 | * multicast applications WILL NOT work for | |
2035 | * (S,G), which have default multicast route pointing | |
2036 | * to wrong oif. In any case, it is not a good | |
2037 | * idea to use multicasting applications on router. | |
1da177e4 LT |
2038 | */ |
2039 | goto dont_forward; | |
2040 | } | |
2041 | ||
2042 | cache->mfc_un.res.wrong_if++; | |
1da177e4 | 2043 | |
0c12295a | 2044 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
1da177e4 | 2045 | /* pimsm uses asserts, when switching from RPT to SPT, |
a8cb16dd ED |
2046 | * so that we cannot check that packet arrived on an oif. |
2047 | * It is bad, but otherwise we would need to move pretty | |
2048 | * large chunk of pimd to kernel. Ough... --ANK | |
1da177e4 | 2049 | */ |
0c12295a | 2050 | (mrt->mroute_do_pim || |
6f9374a9 | 2051 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
e905a9ed | 2052 | time_after(jiffies, |
1da177e4 LT |
2053 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { |
2054 | cache->mfc_un.res.last_assert = jiffies; | |
0c12295a | 2055 | ipmr_cache_report(mrt, skb, true_vifi, IGMPMSG_WRONGVIF); |
1da177e4 LT |
2056 | } |
2057 | goto dont_forward; | |
2058 | } | |
2059 | ||
660b26dc | 2060 | forward: |
0c12295a PM |
2061 | mrt->vif_table[vif].pkt_in++; |
2062 | mrt->vif_table[vif].bytes_in += skb->len; | |
1da177e4 | 2063 | |
7ef8f65d | 2064 | /* Forward the frame */ |
360eb5da ND |
2065 | if (cache->mfc_origin == htonl(INADDR_ANY) && |
2066 | cache->mfc_mcastgrp == htonl(INADDR_ANY)) { | |
660b26dc ND |
2067 | if (true_vifi >= 0 && |
2068 | true_vifi != cache->mfc_parent && | |
2069 | ip_hdr(skb)->ttl > | |
2070 | cache->mfc_un.res.ttls[cache->mfc_parent]) { | |
2071 | /* It's an (*,*) entry and the packet is not coming from | |
2072 | * the upstream: forward the packet to the upstream | |
2073 | * only. | |
2074 | */ | |
2075 | psend = cache->mfc_parent; | |
2076 | goto last_forward; | |
2077 | } | |
2078 | goto dont_forward; | |
2079 | } | |
a8cb16dd ED |
2080 | for (ct = cache->mfc_un.res.maxvif - 1; |
2081 | ct >= cache->mfc_un.res.minvif; ct--) { | |
660b26dc | 2082 | /* For (*,G) entry, don't forward to the incoming interface */ |
360eb5da ND |
2083 | if ((cache->mfc_origin != htonl(INADDR_ANY) || |
2084 | ct != true_vifi) && | |
660b26dc | 2085 | ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { |
1da177e4 LT |
2086 | if (psend != -1) { |
2087 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 2088 | |
1da177e4 | 2089 | if (skb2) |
a5bc9294 YG |
2090 | ipmr_queue_xmit(net, mrt, true_vifi, |
2091 | skb2, cache, psend); | |
1da177e4 | 2092 | } |
c354e124 | 2093 | psend = ct; |
1da177e4 LT |
2094 | } |
2095 | } | |
660b26dc | 2096 | last_forward: |
1da177e4 LT |
2097 | if (psend != -1) { |
2098 | if (local) { | |
2099 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 2100 | |
1da177e4 | 2101 | if (skb2) |
a5bc9294 YG |
2102 | ipmr_queue_xmit(net, mrt, true_vifi, skb2, |
2103 | cache, psend); | |
1da177e4 | 2104 | } else { |
a5bc9294 | 2105 | ipmr_queue_xmit(net, mrt, true_vifi, skb, cache, psend); |
c4854ec8 | 2106 | return; |
1da177e4 LT |
2107 | } |
2108 | } | |
2109 | ||
2110 | dont_forward: | |
2111 | if (!local) | |
2112 | kfree_skb(skb); | |
1da177e4 LT |
2113 | } |
2114 | ||
417da66f | 2115 | static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb) |
ee3f1aaf | 2116 | { |
417da66f DM |
2117 | struct rtable *rt = skb_rtable(skb); |
2118 | struct iphdr *iph = ip_hdr(skb); | |
da91981b | 2119 | struct flowi4 fl4 = { |
417da66f DM |
2120 | .daddr = iph->daddr, |
2121 | .saddr = iph->saddr, | |
b0fe4a31 | 2122 | .flowi4_tos = RT_TOS(iph->tos), |
4fd551d7 DM |
2123 | .flowi4_oif = (rt_is_output_route(rt) ? |
2124 | skb->dev->ifindex : 0), | |
2125 | .flowi4_iif = (rt_is_output_route(rt) ? | |
1fb9489b | 2126 | LOOPBACK_IFINDEX : |
4fd551d7 | 2127 | skb->dev->ifindex), |
b4869889 | 2128 | .flowi4_mark = skb->mark, |
ee3f1aaf DM |
2129 | }; |
2130 | struct mr_table *mrt; | |
2131 | int err; | |
2132 | ||
da91981b | 2133 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
ee3f1aaf DM |
2134 | if (err) |
2135 | return ERR_PTR(err); | |
2136 | return mrt; | |
2137 | } | |
1da177e4 | 2138 | |
7ef8f65d NA |
2139 | /* Multicast packets for forwarding arrive here |
2140 | * Called with rcu_read_lock(); | |
1da177e4 | 2141 | */ |
1da177e4 LT |
2142 | int ip_mr_input(struct sk_buff *skb) |
2143 | { | |
2144 | struct mfc_cache *cache; | |
4feb88e5 | 2145 | struct net *net = dev_net(skb->dev); |
511c3f92 | 2146 | int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL; |
f0ad0860 | 2147 | struct mr_table *mrt; |
bcfc7d33 TW |
2148 | struct net_device *dev; |
2149 | ||
2150 | /* skb->dev passed in is the loX master dev for vrfs. | |
2151 | * As there are no vifs associated with loopback devices, | |
2152 | * get the proper interface that does have a vif associated with it. | |
2153 | */ | |
2154 | dev = skb->dev; | |
2155 | if (netif_is_l3_master(skb->dev)) { | |
2156 | dev = dev_get_by_index_rcu(net, IPCB(skb)->iif); | |
2157 | if (!dev) { | |
2158 | kfree_skb(skb); | |
2159 | return -ENODEV; | |
2160 | } | |
2161 | } | |
1da177e4 LT |
2162 | |
2163 | /* Packet is looped back after forward, it should not be | |
a8cb16dd | 2164 | * forwarded second time, but still can be delivered locally. |
1da177e4 | 2165 | */ |
4c968709 | 2166 | if (IPCB(skb)->flags & IPSKB_FORWARDED) |
1da177e4 LT |
2167 | goto dont_forward; |
2168 | ||
417da66f | 2169 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2170 | if (IS_ERR(mrt)) { |
2171 | kfree_skb(skb); | |
2172 | return PTR_ERR(mrt); | |
e40dbc51 | 2173 | } |
1da177e4 | 2174 | if (!local) { |
4c968709 ED |
2175 | if (IPCB(skb)->opt.router_alert) { |
2176 | if (ip_call_ra_chain(skb)) | |
2177 | return 0; | |
2178 | } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP) { | |
2179 | /* IGMPv1 (and broken IGMPv2 implementations sort of | |
2180 | * Cisco IOS <= 11.2(8)) do not put router alert | |
2181 | * option to IGMP packets destined to routable | |
2182 | * groups. It is very bad, because it means | |
2183 | * that we can forward NO IGMP messages. | |
2184 | */ | |
2185 | struct sock *mroute_sk; | |
2186 | ||
2187 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
2188 | if (mroute_sk) { | |
2189 | nf_reset(skb); | |
2190 | raw_rcv(mroute_sk, skb); | |
2191 | return 0; | |
2192 | } | |
1da177e4 LT |
2193 | } |
2194 | } | |
2195 | ||
a8c9486b | 2196 | /* already under rcu_read_lock() */ |
0c12295a | 2197 | cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); |
51456b29 | 2198 | if (!cache) { |
bcfc7d33 | 2199 | int vif = ipmr_find_vif(mrt, dev); |
660b26dc ND |
2200 | |
2201 | if (vif >= 0) | |
2202 | cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr, | |
2203 | vif); | |
2204 | } | |
1da177e4 | 2205 | |
7ef8f65d | 2206 | /* No usable cache entry */ |
51456b29 | 2207 | if (!cache) { |
1da177e4 LT |
2208 | int vif; |
2209 | ||
2210 | if (local) { | |
2211 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
2212 | ip_local_deliver(skb); | |
51456b29 | 2213 | if (!skb2) |
1da177e4 | 2214 | return -ENOBUFS; |
1da177e4 LT |
2215 | skb = skb2; |
2216 | } | |
2217 | ||
a8c9486b | 2218 | read_lock(&mrt_lock); |
bcfc7d33 | 2219 | vif = ipmr_find_vif(mrt, dev); |
1da177e4 | 2220 | if (vif >= 0) { |
4b1f0d33 | 2221 | int err2 = ipmr_cache_unresolved(mrt, vif, skb, dev); |
1da177e4 LT |
2222 | read_unlock(&mrt_lock); |
2223 | ||
0eae88f3 | 2224 | return err2; |
1da177e4 LT |
2225 | } |
2226 | read_unlock(&mrt_lock); | |
2227 | kfree_skb(skb); | |
2228 | return -ENODEV; | |
2229 | } | |
2230 | ||
a8c9486b | 2231 | read_lock(&mrt_lock); |
4b1f0d33 | 2232 | ip_mr_forward(net, mrt, dev, skb, cache, local); |
1da177e4 LT |
2233 | read_unlock(&mrt_lock); |
2234 | ||
2235 | if (local) | |
2236 | return ip_local_deliver(skb); | |
2237 | ||
2238 | return 0; | |
2239 | ||
2240 | dont_forward: | |
2241 | if (local) | |
2242 | return ip_local_deliver(skb); | |
2243 | kfree_skb(skb); | |
2244 | return 0; | |
2245 | } | |
2246 | ||
b1879204 | 2247 | #ifdef CONFIG_IP_PIMSM_V1 |
7ef8f65d | 2248 | /* Handle IGMP messages of PIMv1 */ |
a8cb16dd | 2249 | int pim_rcv_v1(struct sk_buff *skb) |
b1879204 IJ |
2250 | { |
2251 | struct igmphdr *pim; | |
4feb88e5 | 2252 | struct net *net = dev_net(skb->dev); |
f0ad0860 | 2253 | struct mr_table *mrt; |
b1879204 IJ |
2254 | |
2255 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) | |
2256 | goto drop; | |
2257 | ||
2258 | pim = igmp_hdr(skb); | |
2259 | ||
417da66f | 2260 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2261 | if (IS_ERR(mrt)) |
2262 | goto drop; | |
0c12295a | 2263 | if (!mrt->mroute_do_pim || |
b1879204 IJ |
2264 | pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) |
2265 | goto drop; | |
2266 | ||
f0ad0860 | 2267 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2268 | drop: |
2269 | kfree_skb(skb); | |
2270 | } | |
1da177e4 LT |
2271 | return 0; |
2272 | } | |
2273 | #endif | |
2274 | ||
2275 | #ifdef CONFIG_IP_PIMSM_V2 | |
a8cb16dd | 2276 | static int pim_rcv(struct sk_buff *skb) |
1da177e4 LT |
2277 | { |
2278 | struct pimreghdr *pim; | |
f0ad0860 PM |
2279 | struct net *net = dev_net(skb->dev); |
2280 | struct mr_table *mrt; | |
1da177e4 | 2281 | |
b1879204 | 2282 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) |
1da177e4 LT |
2283 | goto drop; |
2284 | ||
9c70220b | 2285 | pim = (struct pimreghdr *)skb_transport_header(skb); |
56245cae | 2286 | if (pim->type != ((PIM_VERSION << 4) | (PIM_TYPE_REGISTER)) || |
a8cb16dd | 2287 | (pim->flags & PIM_NULL_REGISTER) || |
e905a9ed | 2288 | (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && |
d3bc23e7 | 2289 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
1da177e4 LT |
2290 | goto drop; |
2291 | ||
417da66f | 2292 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2293 | if (IS_ERR(mrt)) |
2294 | goto drop; | |
f0ad0860 | 2295 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2296 | drop: |
2297 | kfree_skb(skb); | |
2298 | } | |
1da177e4 LT |
2299 | return 0; |
2300 | } | |
2301 | #endif | |
2302 | ||
cb6a4e46 PM |
2303 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
2304 | struct mfc_cache *c, struct rtmsg *rtm) | |
1da177e4 | 2305 | { |
adfa85e4 | 2306 | struct rta_mfc_stats mfcs; |
43b9e127 NA |
2307 | struct nlattr *mp_attr; |
2308 | struct rtnexthop *nhp; | |
b5036cd4 | 2309 | unsigned long lastuse; |
43b9e127 | 2310 | int ct; |
1da177e4 | 2311 | |
7438189b | 2312 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
1708ebc9 NA |
2313 | if (c->mfc_parent >= MAXVIFS) { |
2314 | rtm->rtm_flags |= RTNH_F_UNRESOLVED; | |
7438189b | 2315 | return -ENOENT; |
1708ebc9 | 2316 | } |
7438189b | 2317 | |
92a395e5 TG |
2318 | if (VIF_EXISTS(mrt, c->mfc_parent) && |
2319 | nla_put_u32(skb, RTA_IIF, mrt->vif_table[c->mfc_parent].dev->ifindex) < 0) | |
2320 | return -EMSGSIZE; | |
1da177e4 | 2321 | |
c7c0bbea YG |
2322 | if (c->mfc_flags & MFC_OFFLOAD) |
2323 | rtm->rtm_flags |= RTNH_F_OFFLOAD; | |
2324 | ||
92a395e5 TG |
2325 | if (!(mp_attr = nla_nest_start(skb, RTA_MULTIPATH))) |
2326 | return -EMSGSIZE; | |
1da177e4 LT |
2327 | |
2328 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
0c12295a | 2329 | if (VIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
92a395e5 TG |
2330 | if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp)))) { |
2331 | nla_nest_cancel(skb, mp_attr); | |
2332 | return -EMSGSIZE; | |
2333 | } | |
2334 | ||
1da177e4 LT |
2335 | nhp->rtnh_flags = 0; |
2336 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
0c12295a | 2337 | nhp->rtnh_ifindex = mrt->vif_table[ct].dev->ifindex; |
1da177e4 LT |
2338 | nhp->rtnh_len = sizeof(*nhp); |
2339 | } | |
2340 | } | |
92a395e5 TG |
2341 | |
2342 | nla_nest_end(skb, mp_attr); | |
2343 | ||
b5036cd4 NA |
2344 | lastuse = READ_ONCE(c->mfc_un.res.lastuse); |
2345 | lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0; | |
2346 | ||
adfa85e4 ND |
2347 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2348 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2349 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
43b9e127 | 2350 | if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) || |
b5036cd4 | 2351 | nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse), |
43b9e127 | 2352 | RTA_PAD)) |
adfa85e4 ND |
2353 | return -EMSGSIZE; |
2354 | ||
1da177e4 LT |
2355 | rtm->rtm_type = RTN_MULTICAST; |
2356 | return 1; | |
1da177e4 LT |
2357 | } |
2358 | ||
9a1b9496 DM |
2359 | int ipmr_get_route(struct net *net, struct sk_buff *skb, |
2360 | __be32 saddr, __be32 daddr, | |
9f09eaea | 2361 | struct rtmsg *rtm, u32 portid) |
1da177e4 | 2362 | { |
1da177e4 | 2363 | struct mfc_cache *cache; |
9a1b9496 DM |
2364 | struct mr_table *mrt; |
2365 | int err; | |
1da177e4 | 2366 | |
f0ad0860 | 2367 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 2368 | if (!mrt) |
f0ad0860 PM |
2369 | return -ENOENT; |
2370 | ||
a8c9486b | 2371 | rcu_read_lock(); |
9a1b9496 | 2372 | cache = ipmr_cache_find(mrt, saddr, daddr); |
51456b29 | 2373 | if (!cache && skb->dev) { |
660b26dc | 2374 | int vif = ipmr_find_vif(mrt, skb->dev); |
1da177e4 | 2375 | |
660b26dc ND |
2376 | if (vif >= 0) |
2377 | cache = ipmr_cache_find_any(mrt, daddr, vif); | |
2378 | } | |
51456b29 | 2379 | if (!cache) { |
72287490 | 2380 | struct sk_buff *skb2; |
eddc9ec5 | 2381 | struct iphdr *iph; |
1da177e4 | 2382 | struct net_device *dev; |
a8cb16dd | 2383 | int vif = -1; |
1da177e4 | 2384 | |
1da177e4 | 2385 | dev = skb->dev; |
a8c9486b | 2386 | read_lock(&mrt_lock); |
a8cb16dd ED |
2387 | if (dev) |
2388 | vif = ipmr_find_vif(mrt, dev); | |
2389 | if (vif < 0) { | |
1da177e4 | 2390 | read_unlock(&mrt_lock); |
a8c9486b | 2391 | rcu_read_unlock(); |
1da177e4 LT |
2392 | return -ENODEV; |
2393 | } | |
72287490 AK |
2394 | skb2 = skb_clone(skb, GFP_ATOMIC); |
2395 | if (!skb2) { | |
2396 | read_unlock(&mrt_lock); | |
a8c9486b | 2397 | rcu_read_unlock(); |
72287490 AK |
2398 | return -ENOMEM; |
2399 | } | |
2400 | ||
2cf75070 | 2401 | NETLINK_CB(skb2).portid = portid; |
e2d1bca7 ACM |
2402 | skb_push(skb2, sizeof(struct iphdr)); |
2403 | skb_reset_network_header(skb2); | |
eddc9ec5 ACM |
2404 | iph = ip_hdr(skb2); |
2405 | iph->ihl = sizeof(struct iphdr) >> 2; | |
9a1b9496 DM |
2406 | iph->saddr = saddr; |
2407 | iph->daddr = daddr; | |
eddc9ec5 | 2408 | iph->version = 0; |
4b1f0d33 | 2409 | err = ipmr_cache_unresolved(mrt, vif, skb2, dev); |
1da177e4 | 2410 | read_unlock(&mrt_lock); |
a8c9486b | 2411 | rcu_read_unlock(); |
1da177e4 LT |
2412 | return err; |
2413 | } | |
2414 | ||
a8c9486b | 2415 | read_lock(&mrt_lock); |
cb6a4e46 | 2416 | err = __ipmr_fill_mroute(mrt, skb, cache, rtm); |
1da177e4 | 2417 | read_unlock(&mrt_lock); |
a8c9486b | 2418 | rcu_read_unlock(); |
1da177e4 LT |
2419 | return err; |
2420 | } | |
2421 | ||
cb6a4e46 | 2422 | static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
65886f43 ND |
2423 | u32 portid, u32 seq, struct mfc_cache *c, int cmd, |
2424 | int flags) | |
cb6a4e46 PM |
2425 | { |
2426 | struct nlmsghdr *nlh; | |
2427 | struct rtmsg *rtm; | |
1eb99af5 | 2428 | int err; |
cb6a4e46 | 2429 | |
65886f43 | 2430 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
51456b29 | 2431 | if (!nlh) |
cb6a4e46 PM |
2432 | return -EMSGSIZE; |
2433 | ||
2434 | rtm = nlmsg_data(nlh); | |
2435 | rtm->rtm_family = RTNL_FAMILY_IPMR; | |
2436 | rtm->rtm_dst_len = 32; | |
2437 | rtm->rtm_src_len = 32; | |
2438 | rtm->rtm_tos = 0; | |
2439 | rtm->rtm_table = mrt->id; | |
f3756b79 DM |
2440 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2441 | goto nla_put_failure; | |
cb6a4e46 PM |
2442 | rtm->rtm_type = RTN_MULTICAST; |
2443 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; | |
9a68ac72 ND |
2444 | if (c->mfc_flags & MFC_STATIC) |
2445 | rtm->rtm_protocol = RTPROT_STATIC; | |
2446 | else | |
2447 | rtm->rtm_protocol = RTPROT_MROUTED; | |
cb6a4e46 PM |
2448 | rtm->rtm_flags = 0; |
2449 | ||
930345ea JB |
2450 | if (nla_put_in_addr(skb, RTA_SRC, c->mfc_origin) || |
2451 | nla_put_in_addr(skb, RTA_DST, c->mfc_mcastgrp)) | |
f3756b79 | 2452 | goto nla_put_failure; |
1eb99af5 ND |
2453 | err = __ipmr_fill_mroute(mrt, skb, c, rtm); |
2454 | /* do not break the dump if cache is unresolved */ | |
2455 | if (err < 0 && err != -ENOENT) | |
cb6a4e46 PM |
2456 | goto nla_put_failure; |
2457 | ||
053c095a JB |
2458 | nlmsg_end(skb, nlh); |
2459 | return 0; | |
cb6a4e46 PM |
2460 | |
2461 | nla_put_failure: | |
2462 | nlmsg_cancel(skb, nlh); | |
2463 | return -EMSGSIZE; | |
2464 | } | |
2465 | ||
8cd3ac9f ND |
2466 | static size_t mroute_msgsize(bool unresolved, int maxvif) |
2467 | { | |
2468 | size_t len = | |
2469 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2470 | + nla_total_size(4) /* RTA_TABLE */ | |
2471 | + nla_total_size(4) /* RTA_SRC */ | |
2472 | + nla_total_size(4) /* RTA_DST */ | |
2473 | ; | |
2474 | ||
2475 | if (!unresolved) | |
2476 | len = len | |
2477 | + nla_total_size(4) /* RTA_IIF */ | |
2478 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2479 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2480 | /* RTA_MFC_STATS */ | |
a9a08042 | 2481 | + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) |
8cd3ac9f ND |
2482 | ; |
2483 | ||
2484 | return len; | |
2485 | } | |
2486 | ||
2487 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, | |
2488 | int cmd) | |
2489 | { | |
2490 | struct net *net = read_pnet(&mrt->net); | |
2491 | struct sk_buff *skb; | |
2492 | int err = -ENOBUFS; | |
2493 | ||
2494 | skb = nlmsg_new(mroute_msgsize(mfc->mfc_parent >= MAXVIFS, mrt->maxvif), | |
2495 | GFP_ATOMIC); | |
51456b29 | 2496 | if (!skb) |
8cd3ac9f ND |
2497 | goto errout; |
2498 | ||
65886f43 | 2499 | err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
8cd3ac9f ND |
2500 | if (err < 0) |
2501 | goto errout; | |
2502 | ||
2503 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE, NULL, GFP_ATOMIC); | |
2504 | return; | |
2505 | ||
2506 | errout: | |
2507 | kfree_skb(skb); | |
2508 | if (err < 0) | |
2509 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE, err); | |
2510 | } | |
2511 | ||
5a645dd8 JG |
2512 | static size_t igmpmsg_netlink_msgsize(size_t payloadlen) |
2513 | { | |
2514 | size_t len = | |
2515 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) | |
2516 | + nla_total_size(1) /* IPMRA_CREPORT_MSGTYPE */ | |
2517 | + nla_total_size(4) /* IPMRA_CREPORT_VIF_ID */ | |
2518 | + nla_total_size(4) /* IPMRA_CREPORT_SRC_ADDR */ | |
2519 | + nla_total_size(4) /* IPMRA_CREPORT_DST_ADDR */ | |
2520 | /* IPMRA_CREPORT_PKT */ | |
2521 | + nla_total_size(payloadlen) | |
2522 | ; | |
2523 | ||
2524 | return len; | |
2525 | } | |
2526 | ||
2527 | static void igmpmsg_netlink_event(struct mr_table *mrt, struct sk_buff *pkt) | |
2528 | { | |
2529 | struct net *net = read_pnet(&mrt->net); | |
2530 | struct nlmsghdr *nlh; | |
2531 | struct rtgenmsg *rtgenm; | |
2532 | struct igmpmsg *msg; | |
2533 | struct sk_buff *skb; | |
2534 | struct nlattr *nla; | |
2535 | int payloadlen; | |
2536 | ||
2537 | payloadlen = pkt->len - sizeof(struct igmpmsg); | |
2538 | msg = (struct igmpmsg *)skb_network_header(pkt); | |
2539 | ||
2540 | skb = nlmsg_new(igmpmsg_netlink_msgsize(payloadlen), GFP_ATOMIC); | |
2541 | if (!skb) | |
2542 | goto errout; | |
2543 | ||
2544 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWCACHEREPORT, | |
2545 | sizeof(struct rtgenmsg), 0); | |
2546 | if (!nlh) | |
2547 | goto errout; | |
2548 | rtgenm = nlmsg_data(nlh); | |
2549 | rtgenm->rtgen_family = RTNL_FAMILY_IPMR; | |
2550 | if (nla_put_u8(skb, IPMRA_CREPORT_MSGTYPE, msg->im_msgtype) || | |
2551 | nla_put_u32(skb, IPMRA_CREPORT_VIF_ID, msg->im_vif) || | |
2552 | nla_put_in_addr(skb, IPMRA_CREPORT_SRC_ADDR, | |
2553 | msg->im_src.s_addr) || | |
2554 | nla_put_in_addr(skb, IPMRA_CREPORT_DST_ADDR, | |
2555 | msg->im_dst.s_addr)) | |
2556 | goto nla_put_failure; | |
2557 | ||
2558 | nla = nla_reserve(skb, IPMRA_CREPORT_PKT, payloadlen); | |
2559 | if (!nla || skb_copy_bits(pkt, sizeof(struct igmpmsg), | |
2560 | nla_data(nla), payloadlen)) | |
2561 | goto nla_put_failure; | |
2562 | ||
2563 | nlmsg_end(skb, nlh); | |
2564 | ||
2565 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE_R, NULL, GFP_ATOMIC); | |
2566 | return; | |
2567 | ||
2568 | nla_put_failure: | |
2569 | nlmsg_cancel(skb, nlh); | |
2570 | errout: | |
2571 | kfree_skb(skb); | |
2572 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE_R, -ENOBUFS); | |
2573 | } | |
2574 | ||
4f75ba69 DS |
2575 | static int ipmr_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
2576 | struct netlink_ext_ack *extack) | |
2577 | { | |
2578 | struct net *net = sock_net(in_skb->sk); | |
2579 | struct nlattr *tb[RTA_MAX + 1]; | |
2580 | struct sk_buff *skb = NULL; | |
2581 | struct mfc_cache *cache; | |
2582 | struct mr_table *mrt; | |
2583 | struct rtmsg *rtm; | |
2584 | __be32 src, grp; | |
2585 | u32 tableid; | |
2586 | int err; | |
2587 | ||
2588 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, | |
2589 | rtm_ipv4_policy, extack); | |
2590 | if (err < 0) | |
2591 | goto errout; | |
2592 | ||
2593 | rtm = nlmsg_data(nlh); | |
2594 | ||
2595 | src = tb[RTA_SRC] ? nla_get_in_addr(tb[RTA_SRC]) : 0; | |
2596 | grp = tb[RTA_DST] ? nla_get_in_addr(tb[RTA_DST]) : 0; | |
2597 | tableid = tb[RTA_TABLE] ? nla_get_u32(tb[RTA_TABLE]) : 0; | |
2598 | ||
2599 | mrt = ipmr_get_table(net, tableid ? tableid : RT_TABLE_DEFAULT); | |
2e3d232e DC |
2600 | if (!mrt) { |
2601 | err = -ENOENT; | |
4f75ba69 DS |
2602 | goto errout_free; |
2603 | } | |
2604 | ||
2605 | /* entries are added/deleted only under RTNL */ | |
2606 | rcu_read_lock(); | |
2607 | cache = ipmr_cache_find(mrt, src, grp); | |
2608 | rcu_read_unlock(); | |
2609 | if (!cache) { | |
2610 | err = -ENOENT; | |
2611 | goto errout_free; | |
2612 | } | |
2613 | ||
2614 | skb = nlmsg_new(mroute_msgsize(false, mrt->maxvif), GFP_KERNEL); | |
2615 | if (!skb) { | |
2616 | err = -ENOBUFS; | |
2617 | goto errout_free; | |
2618 | } | |
2619 | ||
2620 | err = ipmr_fill_mroute(mrt, skb, NETLINK_CB(in_skb).portid, | |
2621 | nlh->nlmsg_seq, cache, | |
2622 | RTM_NEWROUTE, 0); | |
2623 | if (err < 0) | |
2624 | goto errout_free; | |
2625 | ||
2626 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
2627 | ||
2628 | errout: | |
2629 | return err; | |
2630 | ||
2631 | errout_free: | |
2632 | kfree_skb(skb); | |
2633 | goto errout; | |
2634 | } | |
2635 | ||
cb6a4e46 PM |
2636 | static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2637 | { | |
2638 | struct net *net = sock_net(skb->sk); | |
2639 | struct mr_table *mrt; | |
2640 | struct mfc_cache *mfc; | |
2641 | unsigned int t = 0, s_t; | |
cb6a4e46 PM |
2642 | unsigned int e = 0, s_e; |
2643 | ||
2644 | s_t = cb->args[0]; | |
8fb472c0 | 2645 | s_e = cb->args[1]; |
cb6a4e46 | 2646 | |
a8c9486b | 2647 | rcu_read_lock(); |
cb6a4e46 PM |
2648 | ipmr_for_each_table(mrt, net) { |
2649 | if (t < s_t) | |
2650 | goto next_table; | |
8fb472c0 NA |
2651 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) { |
2652 | if (e < s_e) | |
2653 | goto next_entry; | |
2654 | if (ipmr_fill_mroute(mrt, skb, | |
2655 | NETLINK_CB(cb->skb).portid, | |
2656 | cb->nlh->nlmsg_seq, | |
2657 | mfc, RTM_NEWROUTE, | |
2658 | NLM_F_MULTI) < 0) | |
2659 | goto done; | |
cb6a4e46 | 2660 | next_entry: |
8fb472c0 | 2661 | e++; |
cb6a4e46 | 2662 | } |
8fb472c0 NA |
2663 | e = 0; |
2664 | s_e = 0; | |
2665 | ||
1eb99af5 ND |
2666 | spin_lock_bh(&mfc_unres_lock); |
2667 | list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) { | |
2668 | if (e < s_e) | |
2669 | goto next_entry2; | |
2670 | if (ipmr_fill_mroute(mrt, skb, | |
2671 | NETLINK_CB(cb->skb).portid, | |
2672 | cb->nlh->nlmsg_seq, | |
65886f43 ND |
2673 | mfc, RTM_NEWROUTE, |
2674 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2675 | spin_unlock_bh(&mfc_unres_lock); |
2676 | goto done; | |
2677 | } | |
2678 | next_entry2: | |
2679 | e++; | |
2680 | } | |
2681 | spin_unlock_bh(&mfc_unres_lock); | |
8fb472c0 NA |
2682 | e = 0; |
2683 | s_e = 0; | |
cb6a4e46 PM |
2684 | next_table: |
2685 | t++; | |
2686 | } | |
2687 | done: | |
a8c9486b | 2688 | rcu_read_unlock(); |
cb6a4e46 | 2689 | |
8fb472c0 | 2690 | cb->args[1] = e; |
cb6a4e46 PM |
2691 | cb->args[0] = t; |
2692 | ||
2693 | return skb->len; | |
2694 | } | |
2695 | ||
ccbb0aa6 NA |
2696 | static const struct nla_policy rtm_ipmr_policy[RTA_MAX + 1] = { |
2697 | [RTA_SRC] = { .type = NLA_U32 }, | |
2698 | [RTA_DST] = { .type = NLA_U32 }, | |
2699 | [RTA_IIF] = { .type = NLA_U32 }, | |
2700 | [RTA_TABLE] = { .type = NLA_U32 }, | |
2701 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, | |
2702 | }; | |
2703 | ||
2704 | static bool ipmr_rtm_validate_proto(unsigned char rtm_protocol) | |
2705 | { | |
2706 | switch (rtm_protocol) { | |
2707 | case RTPROT_STATIC: | |
2708 | case RTPROT_MROUTED: | |
2709 | return true; | |
2710 | } | |
2711 | return false; | |
2712 | } | |
2713 | ||
2714 | static int ipmr_nla_get_ttls(const struct nlattr *nla, struct mfcctl *mfcc) | |
2715 | { | |
2716 | struct rtnexthop *rtnh = nla_data(nla); | |
2717 | int remaining = nla_len(nla), vifi = 0; | |
2718 | ||
2719 | while (rtnh_ok(rtnh, remaining)) { | |
2720 | mfcc->mfcc_ttls[vifi] = rtnh->rtnh_hops; | |
2721 | if (++vifi == MAXVIFS) | |
2722 | break; | |
2723 | rtnh = rtnh_next(rtnh, &remaining); | |
2724 | } | |
2725 | ||
2726 | return remaining > 0 ? -EINVAL : vifi; | |
2727 | } | |
2728 | ||
2729 | /* returns < 0 on error, 0 for ADD_MFC and 1 for ADD_MFC_PROXY */ | |
2730 | static int rtm_to_ipmr_mfcc(struct net *net, struct nlmsghdr *nlh, | |
2731 | struct mfcctl *mfcc, int *mrtsock, | |
c21ef3e3 DA |
2732 | struct mr_table **mrtret, |
2733 | struct netlink_ext_ack *extack) | |
ccbb0aa6 NA |
2734 | { |
2735 | struct net_device *dev = NULL; | |
2736 | u32 tblid = RT_TABLE_DEFAULT; | |
2737 | struct mr_table *mrt; | |
2738 | struct nlattr *attr; | |
2739 | struct rtmsg *rtm; | |
2740 | int ret, rem; | |
2741 | ||
fceb6435 | 2742 | ret = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipmr_policy, |
c21ef3e3 | 2743 | extack); |
ccbb0aa6 NA |
2744 | if (ret < 0) |
2745 | goto out; | |
2746 | rtm = nlmsg_data(nlh); | |
2747 | ||
2748 | ret = -EINVAL; | |
2749 | if (rtm->rtm_family != RTNL_FAMILY_IPMR || rtm->rtm_dst_len != 32 || | |
2750 | rtm->rtm_type != RTN_MULTICAST || | |
2751 | rtm->rtm_scope != RT_SCOPE_UNIVERSE || | |
2752 | !ipmr_rtm_validate_proto(rtm->rtm_protocol)) | |
2753 | goto out; | |
2754 | ||
2755 | memset(mfcc, 0, sizeof(*mfcc)); | |
2756 | mfcc->mfcc_parent = -1; | |
2757 | ret = 0; | |
2758 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), rem) { | |
2759 | switch (nla_type(attr)) { | |
2760 | case RTA_SRC: | |
2761 | mfcc->mfcc_origin.s_addr = nla_get_be32(attr); | |
2762 | break; | |
2763 | case RTA_DST: | |
2764 | mfcc->mfcc_mcastgrp.s_addr = nla_get_be32(attr); | |
2765 | break; | |
2766 | case RTA_IIF: | |
2767 | dev = __dev_get_by_index(net, nla_get_u32(attr)); | |
2768 | if (!dev) { | |
2769 | ret = -ENODEV; | |
2770 | goto out; | |
2771 | } | |
2772 | break; | |
2773 | case RTA_MULTIPATH: | |
2774 | if (ipmr_nla_get_ttls(attr, mfcc) < 0) { | |
2775 | ret = -EINVAL; | |
2776 | goto out; | |
2777 | } | |
2778 | break; | |
2779 | case RTA_PREFSRC: | |
2780 | ret = 1; | |
2781 | break; | |
2782 | case RTA_TABLE: | |
2783 | tblid = nla_get_u32(attr); | |
2784 | break; | |
2785 | } | |
2786 | } | |
2787 | mrt = ipmr_get_table(net, tblid); | |
2788 | if (!mrt) { | |
2789 | ret = -ENOENT; | |
2790 | goto out; | |
2791 | } | |
2792 | *mrtret = mrt; | |
2793 | *mrtsock = rtm->rtm_protocol == RTPROT_MROUTED ? 1 : 0; | |
2794 | if (dev) | |
2795 | mfcc->mfcc_parent = ipmr_find_vif(mrt, dev); | |
2796 | ||
2797 | out: | |
2798 | return ret; | |
2799 | } | |
2800 | ||
2801 | /* takes care of both newroute and delroute */ | |
c21ef3e3 DA |
2802 | static int ipmr_rtm_route(struct sk_buff *skb, struct nlmsghdr *nlh, |
2803 | struct netlink_ext_ack *extack) | |
ccbb0aa6 NA |
2804 | { |
2805 | struct net *net = sock_net(skb->sk); | |
2806 | int ret, mrtsock, parent; | |
2807 | struct mr_table *tbl; | |
2808 | struct mfcctl mfcc; | |
2809 | ||
2810 | mrtsock = 0; | |
2811 | tbl = NULL; | |
c21ef3e3 | 2812 | ret = rtm_to_ipmr_mfcc(net, nlh, &mfcc, &mrtsock, &tbl, extack); |
ccbb0aa6 NA |
2813 | if (ret < 0) |
2814 | return ret; | |
2815 | ||
2816 | parent = ret ? mfcc.mfcc_parent : -1; | |
2817 | if (nlh->nlmsg_type == RTM_NEWROUTE) | |
2818 | return ipmr_mfc_add(net, tbl, &mfcc, mrtsock, parent); | |
2819 | else | |
2820 | return ipmr_mfc_delete(tbl, &mfcc, parent); | |
2821 | } | |
2822 | ||
772c344d NA |
2823 | static bool ipmr_fill_table(struct mr_table *mrt, struct sk_buff *skb) |
2824 | { | |
2825 | u32 queue_len = atomic_read(&mrt->cache_resolve_queue_len); | |
2826 | ||
2827 | if (nla_put_u32(skb, IPMRA_TABLE_ID, mrt->id) || | |
2828 | nla_put_u32(skb, IPMRA_TABLE_CACHE_RES_QUEUE_LEN, queue_len) || | |
2829 | nla_put_s32(skb, IPMRA_TABLE_MROUTE_REG_VIF_NUM, | |
2830 | mrt->mroute_reg_vif_num) || | |
2831 | nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_ASSERT, | |
2832 | mrt->mroute_do_assert) || | |
2833 | nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_PIM, mrt->mroute_do_pim)) | |
2834 | return false; | |
2835 | ||
2836 | return true; | |
2837 | } | |
2838 | ||
2839 | static bool ipmr_fill_vif(struct mr_table *mrt, u32 vifid, struct sk_buff *skb) | |
2840 | { | |
2841 | struct nlattr *vif_nest; | |
2842 | struct vif_device *vif; | |
2843 | ||
2844 | /* if the VIF doesn't exist just continue */ | |
2845 | if (!VIF_EXISTS(mrt, vifid)) | |
2846 | return true; | |
2847 | ||
2848 | vif = &mrt->vif_table[vifid]; | |
2849 | vif_nest = nla_nest_start(skb, IPMRA_VIF); | |
2850 | if (!vif_nest) | |
2851 | return false; | |
2852 | if (nla_put_u32(skb, IPMRA_VIFA_IFINDEX, vif->dev->ifindex) || | |
2853 | nla_put_u32(skb, IPMRA_VIFA_VIF_ID, vifid) || | |
2854 | nla_put_u16(skb, IPMRA_VIFA_FLAGS, vif->flags) || | |
2855 | nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_IN, vif->bytes_in, | |
2856 | IPMRA_VIFA_PAD) || | |
2857 | nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_OUT, vif->bytes_out, | |
2858 | IPMRA_VIFA_PAD) || | |
2859 | nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_IN, vif->pkt_in, | |
2860 | IPMRA_VIFA_PAD) || | |
2861 | nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_OUT, vif->pkt_out, | |
2862 | IPMRA_VIFA_PAD) || | |
2863 | nla_put_be32(skb, IPMRA_VIFA_LOCAL_ADDR, vif->local) || | |
2864 | nla_put_be32(skb, IPMRA_VIFA_REMOTE_ADDR, vif->remote)) { | |
2865 | nla_nest_cancel(skb, vif_nest); | |
2866 | return false; | |
2867 | } | |
2868 | nla_nest_end(skb, vif_nest); | |
2869 | ||
2870 | return true; | |
2871 | } | |
2872 | ||
2873 | static int ipmr_rtm_dumplink(struct sk_buff *skb, struct netlink_callback *cb) | |
2874 | { | |
2875 | struct net *net = sock_net(skb->sk); | |
2876 | struct nlmsghdr *nlh = NULL; | |
2877 | unsigned int t = 0, s_t; | |
2878 | unsigned int e = 0, s_e; | |
2879 | struct mr_table *mrt; | |
2880 | ||
2881 | s_t = cb->args[0]; | |
2882 | s_e = cb->args[1]; | |
2883 | ||
2884 | ipmr_for_each_table(mrt, net) { | |
2885 | struct nlattr *vifs, *af; | |
2886 | struct ifinfomsg *hdr; | |
2887 | u32 i; | |
2888 | ||
2889 | if (t < s_t) | |
2890 | goto skip_table; | |
2891 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
2892 | cb->nlh->nlmsg_seq, RTM_NEWLINK, | |
2893 | sizeof(*hdr), NLM_F_MULTI); | |
2894 | if (!nlh) | |
2895 | break; | |
2896 | ||
2897 | hdr = nlmsg_data(nlh); | |
2898 | memset(hdr, 0, sizeof(*hdr)); | |
2899 | hdr->ifi_family = RTNL_FAMILY_IPMR; | |
2900 | ||
2901 | af = nla_nest_start(skb, IFLA_AF_SPEC); | |
2902 | if (!af) { | |
2903 | nlmsg_cancel(skb, nlh); | |
2904 | goto out; | |
2905 | } | |
2906 | ||
2907 | if (!ipmr_fill_table(mrt, skb)) { | |
2908 | nlmsg_cancel(skb, nlh); | |
2909 | goto out; | |
2910 | } | |
2911 | ||
2912 | vifs = nla_nest_start(skb, IPMRA_TABLE_VIFS); | |
2913 | if (!vifs) { | |
2914 | nla_nest_end(skb, af); | |
2915 | nlmsg_end(skb, nlh); | |
2916 | goto out; | |
2917 | } | |
2918 | for (i = 0; i < mrt->maxvif; i++) { | |
2919 | if (e < s_e) | |
2920 | goto skip_entry; | |
2921 | if (!ipmr_fill_vif(mrt, i, skb)) { | |
2922 | nla_nest_end(skb, vifs); | |
2923 | nla_nest_end(skb, af); | |
2924 | nlmsg_end(skb, nlh); | |
2925 | goto out; | |
2926 | } | |
2927 | skip_entry: | |
2928 | e++; | |
2929 | } | |
2930 | s_e = 0; | |
2931 | e = 0; | |
2932 | nla_nest_end(skb, vifs); | |
2933 | nla_nest_end(skb, af); | |
2934 | nlmsg_end(skb, nlh); | |
2935 | skip_table: | |
2936 | t++; | |
2937 | } | |
2938 | ||
2939 | out: | |
2940 | cb->args[1] = e; | |
2941 | cb->args[0] = t; | |
2942 | ||
2943 | return skb->len; | |
2944 | } | |
2945 | ||
e905a9ed | 2946 | #ifdef CONFIG_PROC_FS |
7ef8f65d NA |
2947 | /* The /proc interfaces to multicast routing : |
2948 | * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif | |
1da177e4 LT |
2949 | */ |
2950 | struct ipmr_vif_iter { | |
f6bb4514 | 2951 | struct seq_net_private p; |
f0ad0860 | 2952 | struct mr_table *mrt; |
1da177e4 LT |
2953 | int ct; |
2954 | }; | |
2955 | ||
f6bb4514 BT |
2956 | static struct vif_device *ipmr_vif_seq_idx(struct net *net, |
2957 | struct ipmr_vif_iter *iter, | |
1da177e4 LT |
2958 | loff_t pos) |
2959 | { | |
f0ad0860 | 2960 | struct mr_table *mrt = iter->mrt; |
0c12295a PM |
2961 | |
2962 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
2963 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 2964 | continue; |
e905a9ed | 2965 | if (pos-- == 0) |
0c12295a | 2966 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
2967 | } |
2968 | return NULL; | |
2969 | } | |
2970 | ||
2971 | static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
ba93ef74 | 2972 | __acquires(mrt_lock) |
1da177e4 | 2973 | { |
f0ad0860 | 2974 | struct ipmr_vif_iter *iter = seq->private; |
f6bb4514 | 2975 | struct net *net = seq_file_net(seq); |
f0ad0860 PM |
2976 | struct mr_table *mrt; |
2977 | ||
2978 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); | |
51456b29 | 2979 | if (!mrt) |
f0ad0860 PM |
2980 | return ERR_PTR(-ENOENT); |
2981 | ||
2982 | iter->mrt = mrt; | |
f6bb4514 | 2983 | |
1da177e4 | 2984 | read_lock(&mrt_lock); |
f6bb4514 | 2985 | return *pos ? ipmr_vif_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
2986 | : SEQ_START_TOKEN; |
2987 | } | |
2988 | ||
2989 | static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2990 | { | |
2991 | struct ipmr_vif_iter *iter = seq->private; | |
f6bb4514 | 2992 | struct net *net = seq_file_net(seq); |
f0ad0860 | 2993 | struct mr_table *mrt = iter->mrt; |
1da177e4 LT |
2994 | |
2995 | ++*pos; | |
2996 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 2997 | return ipmr_vif_seq_idx(net, iter, 0); |
e905a9ed | 2998 | |
0c12295a PM |
2999 | while (++iter->ct < mrt->maxvif) { |
3000 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 3001 | continue; |
0c12295a | 3002 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
3003 | } |
3004 | return NULL; | |
3005 | } | |
3006 | ||
3007 | static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) | |
ba93ef74 | 3008 | __releases(mrt_lock) |
1da177e4 LT |
3009 | { |
3010 | read_unlock(&mrt_lock); | |
3011 | } | |
3012 | ||
3013 | static int ipmr_vif_seq_show(struct seq_file *seq, void *v) | |
3014 | { | |
f0ad0860 PM |
3015 | struct ipmr_vif_iter *iter = seq->private; |
3016 | struct mr_table *mrt = iter->mrt; | |
f6bb4514 | 3017 | |
1da177e4 | 3018 | if (v == SEQ_START_TOKEN) { |
e905a9ed | 3019 | seq_puts(seq, |
1da177e4 LT |
3020 | "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); |
3021 | } else { | |
3022 | const struct vif_device *vif = v; | |
3023 | const char *name = vif->dev ? vif->dev->name : "none"; | |
3024 | ||
3025 | seq_printf(seq, | |
5b5e0928 | 3026 | "%2zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", |
0c12295a | 3027 | vif - mrt->vif_table, |
e905a9ed | 3028 | name, vif->bytes_in, vif->pkt_in, |
1da177e4 LT |
3029 | vif->bytes_out, vif->pkt_out, |
3030 | vif->flags, vif->local, vif->remote); | |
3031 | } | |
3032 | return 0; | |
3033 | } | |
3034 | ||
f690808e | 3035 | static const struct seq_operations ipmr_vif_seq_ops = { |
1da177e4 LT |
3036 | .start = ipmr_vif_seq_start, |
3037 | .next = ipmr_vif_seq_next, | |
3038 | .stop = ipmr_vif_seq_stop, | |
3039 | .show = ipmr_vif_seq_show, | |
3040 | }; | |
3041 | ||
3042 | static int ipmr_vif_open(struct inode *inode, struct file *file) | |
3043 | { | |
f6bb4514 BT |
3044 | return seq_open_net(inode, file, &ipmr_vif_seq_ops, |
3045 | sizeof(struct ipmr_vif_iter)); | |
1da177e4 LT |
3046 | } |
3047 | ||
9a32144e | 3048 | static const struct file_operations ipmr_vif_fops = { |
1da177e4 LT |
3049 | .owner = THIS_MODULE, |
3050 | .open = ipmr_vif_open, | |
3051 | .read = seq_read, | |
3052 | .llseek = seq_lseek, | |
f6bb4514 | 3053 | .release = seq_release_net, |
1da177e4 LT |
3054 | }; |
3055 | ||
3056 | struct ipmr_mfc_iter { | |
f6bb4514 | 3057 | struct seq_net_private p; |
f0ad0860 | 3058 | struct mr_table *mrt; |
862465f2 | 3059 | struct list_head *cache; |
1da177e4 LT |
3060 | }; |
3061 | ||
f6bb4514 BT |
3062 | static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net, |
3063 | struct ipmr_mfc_iter *it, loff_t pos) | |
1da177e4 | 3064 | { |
f0ad0860 | 3065 | struct mr_table *mrt = it->mrt; |
1da177e4 LT |
3066 | struct mfc_cache *mfc; |
3067 | ||
a8c9486b | 3068 | rcu_read_lock(); |
8fb472c0 NA |
3069 | it->cache = &mrt->mfc_cache_list; |
3070 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) | |
3071 | if (pos-- == 0) | |
3072 | return mfc; | |
a8c9486b | 3073 | rcu_read_unlock(); |
1da177e4 | 3074 | |
1da177e4 | 3075 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 3076 | it->cache = &mrt->mfc_unres_queue; |
862465f2 | 3077 | list_for_each_entry(mfc, it->cache, list) |
e258beb2 | 3078 | if (pos-- == 0) |
1da177e4 LT |
3079 | return mfc; |
3080 | spin_unlock_bh(&mfc_unres_lock); | |
3081 | ||
3082 | it->cache = NULL; | |
3083 | return NULL; | |
3084 | } | |
3085 | ||
3086 | ||
3087 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
3088 | { | |
3089 | struct ipmr_mfc_iter *it = seq->private; | |
f6bb4514 | 3090 | struct net *net = seq_file_net(seq); |
f0ad0860 | 3091 | struct mr_table *mrt; |
f6bb4514 | 3092 | |
f0ad0860 | 3093 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 3094 | if (!mrt) |
f0ad0860 | 3095 | return ERR_PTR(-ENOENT); |
f6bb4514 | 3096 | |
f0ad0860 | 3097 | it->mrt = mrt; |
1da177e4 | 3098 | it->cache = NULL; |
f6bb4514 | 3099 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
3100 | : SEQ_START_TOKEN; |
3101 | } | |
3102 | ||
3103 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3104 | { | |
1da177e4 | 3105 | struct ipmr_mfc_iter *it = seq->private; |
f6bb4514 | 3106 | struct net *net = seq_file_net(seq); |
f0ad0860 | 3107 | struct mr_table *mrt = it->mrt; |
8fb472c0 | 3108 | struct mfc_cache *mfc = v; |
1da177e4 LT |
3109 | |
3110 | ++*pos; | |
3111 | ||
3112 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 3113 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
1da177e4 | 3114 | |
862465f2 PM |
3115 | if (mfc->list.next != it->cache) |
3116 | return list_entry(mfc->list.next, struct mfc_cache, list); | |
e905a9ed | 3117 | |
0c12295a | 3118 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 LT |
3119 | goto end_of_list; |
3120 | ||
1da177e4 | 3121 | /* exhausted cache_array, show unresolved */ |
a8c9486b | 3122 | rcu_read_unlock(); |
0c12295a | 3123 | it->cache = &mrt->mfc_unres_queue; |
e905a9ed | 3124 | |
1da177e4 | 3125 | spin_lock_bh(&mfc_unres_lock); |
862465f2 PM |
3126 | if (!list_empty(it->cache)) |
3127 | return list_first_entry(it->cache, struct mfc_cache, list); | |
1da177e4 | 3128 | |
a8cb16dd | 3129 | end_of_list: |
1da177e4 LT |
3130 | spin_unlock_bh(&mfc_unres_lock); |
3131 | it->cache = NULL; | |
3132 | ||
3133 | return NULL; | |
3134 | } | |
3135 | ||
3136 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
3137 | { | |
3138 | struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 3139 | struct mr_table *mrt = it->mrt; |
1da177e4 | 3140 | |
0c12295a | 3141 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 | 3142 | spin_unlock_bh(&mfc_unres_lock); |
8fb472c0 | 3143 | else if (it->cache == &mrt->mfc_cache_list) |
a8c9486b | 3144 | rcu_read_unlock(); |
1da177e4 LT |
3145 | } |
3146 | ||
3147 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
3148 | { | |
3149 | int n; | |
3150 | ||
3151 | if (v == SEQ_START_TOKEN) { | |
e905a9ed | 3152 | seq_puts(seq, |
1da177e4 LT |
3153 | "Group Origin Iif Pkts Bytes Wrong Oifs\n"); |
3154 | } else { | |
3155 | const struct mfc_cache *mfc = v; | |
3156 | const struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 3157 | const struct mr_table *mrt = it->mrt; |
e905a9ed | 3158 | |
0eae88f3 ED |
3159 | seq_printf(seq, "%08X %08X %-3hd", |
3160 | (__force u32) mfc->mfc_mcastgrp, | |
3161 | (__force u32) mfc->mfc_origin, | |
1ea472e2 | 3162 | mfc->mfc_parent); |
1da177e4 | 3163 | |
0c12295a | 3164 | if (it->cache != &mrt->mfc_unres_queue) { |
1ea472e2 BT |
3165 | seq_printf(seq, " %8lu %8lu %8lu", |
3166 | mfc->mfc_un.res.pkt, | |
3167 | mfc->mfc_un.res.bytes, | |
3168 | mfc->mfc_un.res.wrong_if); | |
132adf54 | 3169 | for (n = mfc->mfc_un.res.minvif; |
a8cb16dd | 3170 | n < mfc->mfc_un.res.maxvif; n++) { |
0c12295a | 3171 | if (VIF_EXISTS(mrt, n) && |
cf958ae3 BT |
3172 | mfc->mfc_un.res.ttls[n] < 255) |
3173 | seq_printf(seq, | |
e905a9ed | 3174 | " %2d:%-3d", |
1da177e4 LT |
3175 | n, mfc->mfc_un.res.ttls[n]); |
3176 | } | |
1ea472e2 BT |
3177 | } else { |
3178 | /* unresolved mfc_caches don't contain | |
3179 | * pkt, bytes and wrong_if values | |
3180 | */ | |
3181 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
1da177e4 LT |
3182 | } |
3183 | seq_putc(seq, '\n'); | |
3184 | } | |
3185 | return 0; | |
3186 | } | |
3187 | ||
f690808e | 3188 | static const struct seq_operations ipmr_mfc_seq_ops = { |
1da177e4 LT |
3189 | .start = ipmr_mfc_seq_start, |
3190 | .next = ipmr_mfc_seq_next, | |
3191 | .stop = ipmr_mfc_seq_stop, | |
3192 | .show = ipmr_mfc_seq_show, | |
3193 | }; | |
3194 | ||
3195 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
3196 | { | |
f6bb4514 BT |
3197 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
3198 | sizeof(struct ipmr_mfc_iter)); | |
1da177e4 LT |
3199 | } |
3200 | ||
9a32144e | 3201 | static const struct file_operations ipmr_mfc_fops = { |
1da177e4 LT |
3202 | .owner = THIS_MODULE, |
3203 | .open = ipmr_mfc_open, | |
3204 | .read = seq_read, | |
3205 | .llseek = seq_lseek, | |
f6bb4514 | 3206 | .release = seq_release_net, |
1da177e4 | 3207 | }; |
e905a9ed | 3208 | #endif |
1da177e4 LT |
3209 | |
3210 | #ifdef CONFIG_IP_PIMSM_V2 | |
32613090 | 3211 | static const struct net_protocol pim_protocol = { |
1da177e4 | 3212 | .handler = pim_rcv, |
403dbb97 | 3213 | .netns_ok = 1, |
1da177e4 LT |
3214 | }; |
3215 | #endif | |
3216 | ||
4d65b948 YG |
3217 | static unsigned int ipmr_seq_read(struct net *net) |
3218 | { | |
3219 | ASSERT_RTNL(); | |
3220 | ||
3221 | return net->ipv4.ipmr_seq + ipmr_rules_seq_read(net); | |
3222 | } | |
3223 | ||
3224 | static int ipmr_dump(struct net *net, struct notifier_block *nb) | |
3225 | { | |
3226 | struct mr_table *mrt; | |
3227 | int err; | |
3228 | ||
3229 | err = ipmr_rules_dump(net, nb); | |
3230 | if (err) | |
3231 | return err; | |
3232 | ||
3233 | ipmr_for_each_table(mrt, net) { | |
3234 | struct vif_device *v = &mrt->vif_table[0]; | |
3235 | struct mfc_cache *mfc; | |
3236 | int vifi; | |
3237 | ||
3238 | /* Notifiy on table VIF entries */ | |
3239 | read_lock(&mrt_lock); | |
3240 | for (vifi = 0; vifi < mrt->maxvif; vifi++, v++) { | |
3241 | if (!v->dev) | |
3242 | continue; | |
3243 | ||
3244 | call_ipmr_vif_entry_notifier(nb, net, FIB_EVENT_VIF_ADD, | |
3245 | v, vifi, mrt->id); | |
3246 | } | |
3247 | read_unlock(&mrt_lock); | |
3248 | ||
3249 | /* Notify on table MFC entries */ | |
3250 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) | |
3251 | call_ipmr_mfc_entry_notifier(nb, net, | |
3252 | FIB_EVENT_ENTRY_ADD, mfc, | |
3253 | mrt->id); | |
3254 | } | |
3255 | ||
3256 | return 0; | |
3257 | } | |
3258 | ||
3259 | static const struct fib_notifier_ops ipmr_notifier_ops_template = { | |
3260 | .family = RTNL_FAMILY_IPMR, | |
3261 | .fib_seq_read = ipmr_seq_read, | |
3262 | .fib_dump = ipmr_dump, | |
3263 | .owner = THIS_MODULE, | |
3264 | }; | |
3265 | ||
ef739d8a | 3266 | static int __net_init ipmr_notifier_init(struct net *net) |
4d65b948 YG |
3267 | { |
3268 | struct fib_notifier_ops *ops; | |
3269 | ||
3270 | net->ipv4.ipmr_seq = 0; | |
3271 | ||
3272 | ops = fib_notifier_ops_register(&ipmr_notifier_ops_template, net); | |
3273 | if (IS_ERR(ops)) | |
3274 | return PTR_ERR(ops); | |
3275 | net->ipv4.ipmr_notifier_ops = ops; | |
3276 | ||
3277 | return 0; | |
3278 | } | |
3279 | ||
3280 | static void __net_exit ipmr_notifier_exit(struct net *net) | |
3281 | { | |
3282 | fib_notifier_ops_unregister(net->ipv4.ipmr_notifier_ops); | |
3283 | net->ipv4.ipmr_notifier_ops = NULL; | |
3284 | } | |
3285 | ||
7ef8f65d | 3286 | /* Setup for IP multicast routing */ |
cf958ae3 BT |
3287 | static int __net_init ipmr_net_init(struct net *net) |
3288 | { | |
f0ad0860 | 3289 | int err; |
cf958ae3 | 3290 | |
4d65b948 YG |
3291 | err = ipmr_notifier_init(net); |
3292 | if (err) | |
3293 | goto ipmr_notifier_fail; | |
3294 | ||
f0ad0860 PM |
3295 | err = ipmr_rules_init(net); |
3296 | if (err < 0) | |
4d65b948 | 3297 | goto ipmr_rules_fail; |
f6bb4514 BT |
3298 | |
3299 | #ifdef CONFIG_PROC_FS | |
3300 | err = -ENOMEM; | |
d4beaa66 | 3301 | if (!proc_create("ip_mr_vif", 0, net->proc_net, &ipmr_vif_fops)) |
f6bb4514 | 3302 | goto proc_vif_fail; |
d4beaa66 | 3303 | if (!proc_create("ip_mr_cache", 0, net->proc_net, &ipmr_mfc_fops)) |
f6bb4514 BT |
3304 | goto proc_cache_fail; |
3305 | #endif | |
2bb8b26c BT |
3306 | return 0; |
3307 | ||
f6bb4514 BT |
3308 | #ifdef CONFIG_PROC_FS |
3309 | proc_cache_fail: | |
ece31ffd | 3310 | remove_proc_entry("ip_mr_vif", net->proc_net); |
f6bb4514 | 3311 | proc_vif_fail: |
f0ad0860 | 3312 | ipmr_rules_exit(net); |
f6bb4514 | 3313 | #endif |
4d65b948 YG |
3314 | ipmr_rules_fail: |
3315 | ipmr_notifier_exit(net); | |
3316 | ipmr_notifier_fail: | |
cf958ae3 BT |
3317 | return err; |
3318 | } | |
3319 | ||
3320 | static void __net_exit ipmr_net_exit(struct net *net) | |
3321 | { | |
f6bb4514 | 3322 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
3323 | remove_proc_entry("ip_mr_cache", net->proc_net); |
3324 | remove_proc_entry("ip_mr_vif", net->proc_net); | |
f6bb4514 | 3325 | #endif |
4d65b948 | 3326 | ipmr_notifier_exit(net); |
f0ad0860 | 3327 | ipmr_rules_exit(net); |
cf958ae3 BT |
3328 | } |
3329 | ||
3330 | static struct pernet_operations ipmr_net_ops = { | |
3331 | .init = ipmr_net_init, | |
3332 | .exit = ipmr_net_exit, | |
3333 | }; | |
e905a9ed | 3334 | |
03d2f897 | 3335 | int __init ip_mr_init(void) |
1da177e4 | 3336 | { |
03d2f897 WC |
3337 | int err; |
3338 | ||
1da177e4 LT |
3339 | mrt_cachep = kmem_cache_create("ip_mrt_cache", |
3340 | sizeof(struct mfc_cache), | |
a8c9486b | 3341 | 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, |
20c2df83 | 3342 | NULL); |
03d2f897 | 3343 | |
cf958ae3 BT |
3344 | err = register_pernet_subsys(&ipmr_net_ops); |
3345 | if (err) | |
3346 | goto reg_pernet_fail; | |
3347 | ||
03d2f897 WC |
3348 | err = register_netdevice_notifier(&ip_mr_notifier); |
3349 | if (err) | |
3350 | goto reg_notif_fail; | |
403dbb97 TG |
3351 | #ifdef CONFIG_IP_PIMSM_V2 |
3352 | if (inet_add_protocol(&pim_protocol, IPPROTO_PIM) < 0) { | |
058bd4d2 | 3353 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
3354 | err = -EAGAIN; |
3355 | goto add_proto_fail; | |
3356 | } | |
3357 | #endif | |
c7ac8679 | 3358 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETROUTE, |
b97bac64 | 3359 | ipmr_rtm_getroute, ipmr_rtm_dumproute, 0); |
ccbb0aa6 | 3360 | rtnl_register(RTNL_FAMILY_IPMR, RTM_NEWROUTE, |
b97bac64 | 3361 | ipmr_rtm_route, NULL, 0); |
ccbb0aa6 | 3362 | rtnl_register(RTNL_FAMILY_IPMR, RTM_DELROUTE, |
b97bac64 | 3363 | ipmr_rtm_route, NULL, 0); |
772c344d NA |
3364 | |
3365 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETLINK, | |
b97bac64 | 3366 | NULL, ipmr_rtm_dumplink, 0); |
03d2f897 | 3367 | return 0; |
f6bb4514 | 3368 | |
403dbb97 TG |
3369 | #ifdef CONFIG_IP_PIMSM_V2 |
3370 | add_proto_fail: | |
3371 | unregister_netdevice_notifier(&ip_mr_notifier); | |
3372 | #endif | |
c3e38896 | 3373 | reg_notif_fail: |
cf958ae3 BT |
3374 | unregister_pernet_subsys(&ipmr_net_ops); |
3375 | reg_pernet_fail: | |
c3e38896 | 3376 | kmem_cache_destroy(mrt_cachep); |
03d2f897 | 3377 | return err; |
1da177e4 | 3378 | } |