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 | ||
1da177e4 LT |
29 | #include <asm/uaccess.h> |
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> |
1da177e4 | 70 | |
f0ad0860 PM |
71 | struct ipmr_rule { |
72 | struct fib_rule common; | |
73 | }; | |
74 | ||
75 | struct ipmr_result { | |
76 | struct mr_table *mrt; | |
77 | }; | |
78 | ||
1da177e4 | 79 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
a8cb16dd | 80 | * Note that the changes are semaphored via rtnl_lock. |
1da177e4 LT |
81 | */ |
82 | ||
83 | static DEFINE_RWLOCK(mrt_lock); | |
84 | ||
7ef8f65d | 85 | /* Multicast router control variables */ |
1da177e4 | 86 | |
1da177e4 LT |
87 | /* Special spinlock for queue of unresolved entries */ |
88 | static DEFINE_SPINLOCK(mfc_unres_lock); | |
89 | ||
90 | /* We return to original Alan's scheme. Hash table of resolved | |
a8cb16dd ED |
91 | * entries is changed only in process context and protected |
92 | * with weak lock mrt_lock. Queue of unresolved entries is protected | |
93 | * with strong spinlock mfc_unres_lock. | |
94 | * | |
95 | * In this case data path is free of exclusive locks at all. | |
1da177e4 LT |
96 | */ |
97 | ||
e18b890b | 98 | static struct kmem_cache *mrt_cachep __read_mostly; |
1da177e4 | 99 | |
f0ad0860 | 100 | static struct mr_table *ipmr_new_table(struct net *net, u32 id); |
acbb219d FR |
101 | static void ipmr_free_table(struct mr_table *mrt); |
102 | ||
c4854ec8 RR |
103 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
104 | struct sk_buff *skb, struct mfc_cache *cache, | |
105 | int local); | |
0c12295a | 106 | static int ipmr_cache_report(struct mr_table *mrt, |
4feb88e5 | 107 | struct sk_buff *pkt, vifi_t vifi, int assert); |
cb6a4e46 PM |
108 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
109 | struct mfc_cache *c, struct rtmsg *rtm); | |
8cd3ac9f ND |
110 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, |
111 | int cmd); | |
0e615e96 | 112 | static void mroute_clean_tables(struct mr_table *mrt, bool all); |
f0ad0860 PM |
113 | static void ipmr_expire_process(unsigned long arg); |
114 | ||
115 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES | |
116 | #define ipmr_for_each_table(mrt, net) \ | |
117 | list_for_each_entry_rcu(mrt, &net->ipv4.mr_tables, list) | |
118 | ||
119 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) | |
120 | { | |
121 | struct mr_table *mrt; | |
122 | ||
123 | ipmr_for_each_table(mrt, net) { | |
124 | if (mrt->id == id) | |
125 | return mrt; | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
da91981b | 130 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
f0ad0860 PM |
131 | struct mr_table **mrt) |
132 | { | |
f0ad0860 | 133 | int err; |
95f4a45d HFS |
134 | struct ipmr_result res; |
135 | struct fib_lookup_arg arg = { | |
136 | .result = &res, | |
137 | .flags = FIB_LOOKUP_NOREF, | |
138 | }; | |
f0ad0860 | 139 | |
da91981b DM |
140 | err = fib_rules_lookup(net->ipv4.mr_rules_ops, |
141 | flowi4_to_flowi(flp4), 0, &arg); | |
f0ad0860 PM |
142 | if (err < 0) |
143 | return err; | |
144 | *mrt = res.mrt; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp, | |
149 | int flags, struct fib_lookup_arg *arg) | |
150 | { | |
151 | struct ipmr_result *res = arg->result; | |
152 | struct mr_table *mrt; | |
1da177e4 | 153 | |
f0ad0860 PM |
154 | switch (rule->action) { |
155 | case FR_ACT_TO_TBL: | |
156 | break; | |
157 | case FR_ACT_UNREACHABLE: | |
158 | return -ENETUNREACH; | |
159 | case FR_ACT_PROHIBIT: | |
160 | return -EACCES; | |
161 | case FR_ACT_BLACKHOLE: | |
162 | default: | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | mrt = ipmr_get_table(rule->fr_net, rule->table); | |
51456b29 | 167 | if (!mrt) |
f0ad0860 PM |
168 | return -EAGAIN; |
169 | res->mrt = mrt; | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static int ipmr_rule_match(struct fib_rule *rule, struct flowi *fl, int flags) | |
174 | { | |
175 | return 1; | |
176 | } | |
177 | ||
178 | static const struct nla_policy ipmr_rule_policy[FRA_MAX + 1] = { | |
179 | FRA_GENERIC_POLICY, | |
180 | }; | |
181 | ||
182 | static int ipmr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, | |
183 | struct fib_rule_hdr *frh, struct nlattr **tb) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static int ipmr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, | |
189 | struct nlattr **tb) | |
190 | { | |
191 | return 1; | |
192 | } | |
193 | ||
194 | static int ipmr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, | |
195 | struct fib_rule_hdr *frh) | |
196 | { | |
197 | frh->dst_len = 0; | |
198 | frh->src_len = 0; | |
199 | frh->tos = 0; | |
200 | return 0; | |
201 | } | |
202 | ||
04a6f82c | 203 | static const struct fib_rules_ops __net_initconst ipmr_rules_ops_template = { |
25239cee | 204 | .family = RTNL_FAMILY_IPMR, |
f0ad0860 PM |
205 | .rule_size = sizeof(struct ipmr_rule), |
206 | .addr_size = sizeof(u32), | |
207 | .action = ipmr_rule_action, | |
208 | .match = ipmr_rule_match, | |
209 | .configure = ipmr_rule_configure, | |
210 | .compare = ipmr_rule_compare, | |
f0ad0860 PM |
211 | .fill = ipmr_rule_fill, |
212 | .nlgroup = RTNLGRP_IPV4_RULE, | |
213 | .policy = ipmr_rule_policy, | |
214 | .owner = THIS_MODULE, | |
215 | }; | |
216 | ||
217 | static int __net_init ipmr_rules_init(struct net *net) | |
218 | { | |
219 | struct fib_rules_ops *ops; | |
220 | struct mr_table *mrt; | |
221 | int err; | |
222 | ||
223 | ops = fib_rules_register(&ipmr_rules_ops_template, net); | |
224 | if (IS_ERR(ops)) | |
225 | return PTR_ERR(ops); | |
226 | ||
227 | INIT_LIST_HEAD(&net->ipv4.mr_tables); | |
228 | ||
229 | mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); | |
1113ebbc NA |
230 | if (IS_ERR(mrt)) { |
231 | err = PTR_ERR(mrt); | |
f0ad0860 PM |
232 | goto err1; |
233 | } | |
234 | ||
235 | err = fib_default_rule_add(ops, 0x7fff, RT_TABLE_DEFAULT, 0); | |
236 | if (err < 0) | |
237 | goto err2; | |
238 | ||
239 | net->ipv4.mr_rules_ops = ops; | |
240 | return 0; | |
241 | ||
242 | err2: | |
f243e5a7 | 243 | ipmr_free_table(mrt); |
f0ad0860 PM |
244 | err1: |
245 | fib_rules_unregister(ops); | |
246 | return err; | |
247 | } | |
248 | ||
249 | static void __net_exit ipmr_rules_exit(struct net *net) | |
250 | { | |
251 | struct mr_table *mrt, *next; | |
252 | ||
ed785309 | 253 | rtnl_lock(); |
035320d5 ED |
254 | list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) { |
255 | list_del(&mrt->list); | |
acbb219d | 256 | ipmr_free_table(mrt); |
035320d5 | 257 | } |
f0ad0860 | 258 | fib_rules_unregister(net->ipv4.mr_rules_ops); |
419df12f | 259 | rtnl_unlock(); |
f0ad0860 PM |
260 | } |
261 | #else | |
262 | #define ipmr_for_each_table(mrt, net) \ | |
263 | for (mrt = net->ipv4.mrt; mrt; mrt = NULL) | |
264 | ||
265 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) | |
266 | { | |
267 | return net->ipv4.mrt; | |
268 | } | |
269 | ||
da91981b | 270 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
f0ad0860 PM |
271 | struct mr_table **mrt) |
272 | { | |
273 | *mrt = net->ipv4.mrt; | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static int __net_init ipmr_rules_init(struct net *net) | |
278 | { | |
1113ebbc NA |
279 | struct mr_table *mrt; |
280 | ||
281 | mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); | |
282 | if (IS_ERR(mrt)) | |
283 | return PTR_ERR(mrt); | |
284 | net->ipv4.mrt = mrt; | |
285 | return 0; | |
f0ad0860 PM |
286 | } |
287 | ||
288 | static void __net_exit ipmr_rules_exit(struct net *net) | |
289 | { | |
ed785309 | 290 | rtnl_lock(); |
acbb219d | 291 | ipmr_free_table(net->ipv4.mrt); |
ed785309 WC |
292 | net->ipv4.mrt = NULL; |
293 | rtnl_unlock(); | |
f0ad0860 PM |
294 | } |
295 | #endif | |
296 | ||
297 | static struct mr_table *ipmr_new_table(struct net *net, u32 id) | |
298 | { | |
299 | struct mr_table *mrt; | |
300 | unsigned int i; | |
1da177e4 | 301 | |
1113ebbc NA |
302 | /* "pimreg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
303 | if (id != RT_TABLE_DEFAULT && id >= 1000000000) | |
304 | return ERR_PTR(-EINVAL); | |
305 | ||
f0ad0860 | 306 | mrt = ipmr_get_table(net, id); |
00db4124 | 307 | if (mrt) |
f0ad0860 PM |
308 | return mrt; |
309 | ||
310 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); | |
51456b29 | 311 | if (!mrt) |
1113ebbc | 312 | return ERR_PTR(-ENOMEM); |
8de53dfb | 313 | write_pnet(&mrt->net, net); |
f0ad0860 PM |
314 | mrt->id = id; |
315 | ||
316 | /* Forwarding cache */ | |
317 | for (i = 0; i < MFC_LINES; i++) | |
318 | INIT_LIST_HEAD(&mrt->mfc_cache_array[i]); | |
319 | ||
320 | INIT_LIST_HEAD(&mrt->mfc_unres_queue); | |
321 | ||
322 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, | |
323 | (unsigned long)mrt); | |
324 | ||
f0ad0860 | 325 | mrt->mroute_reg_vif_num = -1; |
f0ad0860 PM |
326 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
327 | list_add_tail_rcu(&mrt->list, &net->ipv4.mr_tables); | |
328 | #endif | |
329 | return mrt; | |
330 | } | |
1da177e4 | 331 | |
acbb219d FR |
332 | static void ipmr_free_table(struct mr_table *mrt) |
333 | { | |
334 | del_timer_sync(&mrt->ipmr_expire_timer); | |
0e615e96 | 335 | mroute_clean_tables(mrt, true); |
acbb219d FR |
336 | kfree(mrt); |
337 | } | |
338 | ||
1da177e4 LT |
339 | /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ |
340 | ||
d607032d WC |
341 | static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) |
342 | { | |
4feb88e5 BT |
343 | struct net *net = dev_net(dev); |
344 | ||
d607032d WC |
345 | dev_close(dev); |
346 | ||
4feb88e5 | 347 | dev = __dev_get_by_name(net, "tunl0"); |
d607032d | 348 | if (dev) { |
5bc3eb7e | 349 | const struct net_device_ops *ops = dev->netdev_ops; |
d607032d | 350 | struct ifreq ifr; |
d607032d WC |
351 | struct ip_tunnel_parm p; |
352 | ||
353 | memset(&p, 0, sizeof(p)); | |
354 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
355 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
356 | p.iph.version = 4; | |
357 | p.iph.ihl = 5; | |
358 | p.iph.protocol = IPPROTO_IPIP; | |
359 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
360 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; | |
361 | ||
5bc3eb7e SH |
362 | if (ops->ndo_do_ioctl) { |
363 | mm_segment_t oldfs = get_fs(); | |
364 | ||
365 | set_fs(KERNEL_DS); | |
366 | ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); | |
367 | set_fs(oldfs); | |
368 | } | |
d607032d WC |
369 | } |
370 | } | |
371 | ||
a0b47736 NA |
372 | /* Initialize ipmr pimreg/tunnel in_device */ |
373 | static bool ipmr_init_vif_indev(const struct net_device *dev) | |
374 | { | |
375 | struct in_device *in_dev; | |
376 | ||
377 | ASSERT_RTNL(); | |
378 | ||
379 | in_dev = __in_dev_get_rtnl(dev); | |
380 | if (!in_dev) | |
381 | return false; | |
382 | ipv4_devconf_setall(in_dev); | |
383 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
384 | IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; | |
385 | ||
386 | return true; | |
387 | } | |
388 | ||
7ef8f65d | 389 | static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v) |
1da177e4 LT |
390 | { |
391 | struct net_device *dev; | |
392 | ||
4feb88e5 | 393 | dev = __dev_get_by_name(net, "tunl0"); |
1da177e4 LT |
394 | |
395 | if (dev) { | |
5bc3eb7e | 396 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 LT |
397 | int err; |
398 | struct ifreq ifr; | |
1da177e4 | 399 | struct ip_tunnel_parm p; |
1da177e4 LT |
400 | |
401 | memset(&p, 0, sizeof(p)); | |
402 | p.iph.daddr = v->vifc_rmt_addr.s_addr; | |
403 | p.iph.saddr = v->vifc_lcl_addr.s_addr; | |
404 | p.iph.version = 4; | |
405 | p.iph.ihl = 5; | |
406 | p.iph.protocol = IPPROTO_IPIP; | |
407 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); | |
ba93ef74 | 408 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 409 | |
5bc3eb7e SH |
410 | if (ops->ndo_do_ioctl) { |
411 | mm_segment_t oldfs = get_fs(); | |
412 | ||
413 | set_fs(KERNEL_DS); | |
414 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
415 | set_fs(oldfs); | |
a8cb16dd | 416 | } else { |
5bc3eb7e | 417 | err = -EOPNOTSUPP; |
a8cb16dd | 418 | } |
1da177e4 LT |
419 | dev = NULL; |
420 | ||
4feb88e5 BT |
421 | if (err == 0 && |
422 | (dev = __dev_get_by_name(net, p.name)) != NULL) { | |
1da177e4 | 423 | dev->flags |= IFF_MULTICAST; |
a0b47736 | 424 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 425 | goto failure; |
1da177e4 LT |
426 | if (dev_open(dev)) |
427 | goto failure; | |
7dc00c82 | 428 | dev_hold(dev); |
1da177e4 LT |
429 | } |
430 | } | |
431 | return dev; | |
432 | ||
433 | failure: | |
1da177e4 LT |
434 | unregister_netdevice(dev); |
435 | return NULL; | |
436 | } | |
437 | ||
c316c629 | 438 | #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) |
6fef4c0c | 439 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 440 | { |
4feb88e5 | 441 | struct net *net = dev_net(dev); |
f0ad0860 | 442 | struct mr_table *mrt; |
da91981b DM |
443 | struct flowi4 fl4 = { |
444 | .flowi4_oif = dev->ifindex, | |
6a662719 | 445 | .flowi4_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
da91981b | 446 | .flowi4_mark = skb->mark, |
f0ad0860 PM |
447 | }; |
448 | int err; | |
449 | ||
da91981b | 450 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
e40dbc51 BG |
451 | if (err < 0) { |
452 | kfree_skb(skb); | |
f0ad0860 | 453 | return err; |
e40dbc51 | 454 | } |
4feb88e5 | 455 | |
1da177e4 | 456 | read_lock(&mrt_lock); |
cf3677ae PE |
457 | dev->stats.tx_bytes += skb->len; |
458 | dev->stats.tx_packets++; | |
0c12295a | 459 | ipmr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, IGMPMSG_WHOLEPKT); |
1da177e4 LT |
460 | read_unlock(&mrt_lock); |
461 | kfree_skb(skb); | |
6ed10654 | 462 | return NETDEV_TX_OK; |
1da177e4 LT |
463 | } |
464 | ||
ee9b9596 ND |
465 | static int reg_vif_get_iflink(const struct net_device *dev) |
466 | { | |
467 | return 0; | |
468 | } | |
469 | ||
007c3838 SH |
470 | static const struct net_device_ops reg_vif_netdev_ops = { |
471 | .ndo_start_xmit = reg_vif_xmit, | |
ee9b9596 | 472 | .ndo_get_iflink = reg_vif_get_iflink, |
007c3838 SH |
473 | }; |
474 | ||
1da177e4 LT |
475 | static void reg_vif_setup(struct net_device *dev) |
476 | { | |
477 | dev->type = ARPHRD_PIMREG; | |
46f25dff | 478 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; |
1da177e4 | 479 | dev->flags = IFF_NOARP; |
70cb4a45 | 480 | dev->netdev_ops = ®_vif_netdev_ops; |
1da177e4 | 481 | dev->destructor = free_netdev; |
403dbb97 | 482 | dev->features |= NETIF_F_NETNS_LOCAL; |
1da177e4 LT |
483 | } |
484 | ||
f0ad0860 | 485 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) |
1da177e4 LT |
486 | { |
487 | struct net_device *dev; | |
f0ad0860 | 488 | char name[IFNAMSIZ]; |
1da177e4 | 489 | |
f0ad0860 PM |
490 | if (mrt->id == RT_TABLE_DEFAULT) |
491 | sprintf(name, "pimreg"); | |
492 | else | |
493 | sprintf(name, "pimreg%u", mrt->id); | |
1da177e4 | 494 | |
c835a677 | 495 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
1da177e4 | 496 | |
51456b29 | 497 | if (!dev) |
1da177e4 LT |
498 | return NULL; |
499 | ||
403dbb97 TG |
500 | dev_net_set(dev, net); |
501 | ||
1da177e4 LT |
502 | if (register_netdevice(dev)) { |
503 | free_netdev(dev); | |
504 | return NULL; | |
505 | } | |
1da177e4 | 506 | |
a0b47736 | 507 | if (!ipmr_init_vif_indev(dev)) |
1da177e4 | 508 | goto failure; |
1da177e4 LT |
509 | if (dev_open(dev)) |
510 | goto failure; | |
511 | ||
7dc00c82 WC |
512 | dev_hold(dev); |
513 | ||
1da177e4 LT |
514 | return dev; |
515 | ||
516 | failure: | |
1da177e4 LT |
517 | unregister_netdevice(dev); |
518 | return NULL; | |
519 | } | |
c316c629 NA |
520 | |
521 | /* called with rcu_read_lock() */ | |
522 | static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, | |
523 | unsigned int pimlen) | |
524 | { | |
525 | struct net_device *reg_dev = NULL; | |
526 | struct iphdr *encap; | |
527 | ||
528 | encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); | |
7ef8f65d | 529 | /* Check that: |
c316c629 NA |
530 | * a. packet is really sent to a multicast group |
531 | * b. packet is not a NULL-REGISTER | |
532 | * c. packet is not truncated | |
533 | */ | |
534 | if (!ipv4_is_multicast(encap->daddr) || | |
535 | encap->tot_len == 0 || | |
536 | ntohs(encap->tot_len) + pimlen > skb->len) | |
537 | return 1; | |
538 | ||
539 | read_lock(&mrt_lock); | |
540 | if (mrt->mroute_reg_vif_num >= 0) | |
541 | reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev; | |
542 | read_unlock(&mrt_lock); | |
543 | ||
544 | if (!reg_dev) | |
545 | return 1; | |
546 | ||
547 | skb->mac_header = skb->network_header; | |
548 | skb_pull(skb, (u8 *)encap - skb->data); | |
549 | skb_reset_network_header(skb); | |
550 | skb->protocol = htons(ETH_P_IP); | |
551 | skb->ip_summed = CHECKSUM_NONE; | |
552 | ||
553 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); | |
554 | ||
555 | netif_rx(skb); | |
556 | ||
557 | return NET_RX_SUCCESS; | |
558 | } | |
559 | #else | |
560 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) | |
561 | { | |
562 | return NULL; | |
563 | } | |
1da177e4 LT |
564 | #endif |
565 | ||
2c53040f BH |
566 | /** |
567 | * vif_delete - Delete a VIF entry | |
7dc00c82 | 568 | * @notify: Set to 1, if the caller is a notifier_call |
1da177e4 | 569 | */ |
0c12295a | 570 | static int vif_delete(struct mr_table *mrt, int vifi, int notify, |
d17fa6fa | 571 | struct list_head *head) |
1da177e4 LT |
572 | { |
573 | struct vif_device *v; | |
574 | struct net_device *dev; | |
575 | struct in_device *in_dev; | |
576 | ||
0c12295a | 577 | if (vifi < 0 || vifi >= mrt->maxvif) |
1da177e4 LT |
578 | return -EADDRNOTAVAIL; |
579 | ||
0c12295a | 580 | v = &mrt->vif_table[vifi]; |
1da177e4 LT |
581 | |
582 | write_lock_bh(&mrt_lock); | |
583 | dev = v->dev; | |
584 | v->dev = NULL; | |
585 | ||
586 | if (!dev) { | |
587 | write_unlock_bh(&mrt_lock); | |
588 | return -EADDRNOTAVAIL; | |
589 | } | |
590 | ||
0c12295a PM |
591 | if (vifi == mrt->mroute_reg_vif_num) |
592 | mrt->mroute_reg_vif_num = -1; | |
1da177e4 | 593 | |
a8cb16dd | 594 | if (vifi + 1 == mrt->maxvif) { |
1da177e4 | 595 | int tmp; |
a8cb16dd ED |
596 | |
597 | for (tmp = vifi - 1; tmp >= 0; tmp--) { | |
0c12295a | 598 | if (VIF_EXISTS(mrt, tmp)) |
1da177e4 LT |
599 | break; |
600 | } | |
0c12295a | 601 | mrt->maxvif = tmp+1; |
1da177e4 LT |
602 | } |
603 | ||
604 | write_unlock_bh(&mrt_lock); | |
605 | ||
606 | dev_set_allmulti(dev, -1); | |
607 | ||
a8cb16dd ED |
608 | in_dev = __in_dev_get_rtnl(dev); |
609 | if (in_dev) { | |
42f811b8 | 610 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; |
d67b8c61 ND |
611 | inet_netconf_notify_devconf(dev_net(dev), |
612 | NETCONFA_MC_FORWARDING, | |
613 | dev->ifindex, &in_dev->cnf); | |
1da177e4 LT |
614 | ip_rt_multicast_event(in_dev); |
615 | } | |
616 | ||
a8cb16dd | 617 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER) && !notify) |
d17fa6fa | 618 | unregister_netdevice_queue(dev, head); |
1da177e4 LT |
619 | |
620 | dev_put(dev); | |
621 | return 0; | |
622 | } | |
623 | ||
a8c9486b | 624 | static void ipmr_cache_free_rcu(struct rcu_head *head) |
5c0a66f5 | 625 | { |
a8c9486b ED |
626 | struct mfc_cache *c = container_of(head, struct mfc_cache, rcu); |
627 | ||
5c0a66f5 BT |
628 | kmem_cache_free(mrt_cachep, c); |
629 | } | |
630 | ||
a8c9486b ED |
631 | static inline void ipmr_cache_free(struct mfc_cache *c) |
632 | { | |
633 | call_rcu(&c->rcu, ipmr_cache_free_rcu); | |
634 | } | |
635 | ||
1da177e4 | 636 | /* Destroy an unresolved cache entry, killing queued skbs |
a8cb16dd | 637 | * and reporting error to netlink readers. |
1da177e4 | 638 | */ |
0c12295a | 639 | static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) |
1da177e4 | 640 | { |
8de53dfb | 641 | struct net *net = read_pnet(&mrt->net); |
1da177e4 | 642 | struct sk_buff *skb; |
9ef1d4c7 | 643 | struct nlmsgerr *e; |
1da177e4 | 644 | |
0c12295a | 645 | atomic_dec(&mrt->cache_resolve_queue_len); |
1da177e4 | 646 | |
c354e124 | 647 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) { |
eddc9ec5 | 648 | if (ip_hdr(skb)->version == 0) { |
1da177e4 LT |
649 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); |
650 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 651 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 652 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 653 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
654 | e->error = -ETIMEDOUT; |
655 | memset(&e->msg, 0, sizeof(e->msg)); | |
2942e900 | 656 | |
15e47304 | 657 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 658 | } else { |
1da177e4 | 659 | kfree_skb(skb); |
a8cb16dd | 660 | } |
1da177e4 LT |
661 | } |
662 | ||
5c0a66f5 | 663 | ipmr_cache_free(c); |
1da177e4 LT |
664 | } |
665 | ||
e258beb2 | 666 | /* Timer process for the unresolved queue. */ |
e258beb2 | 667 | static void ipmr_expire_process(unsigned long arg) |
1da177e4 | 668 | { |
0c12295a | 669 | struct mr_table *mrt = (struct mr_table *)arg; |
1da177e4 LT |
670 | unsigned long now; |
671 | unsigned long expires; | |
862465f2 | 672 | struct mfc_cache *c, *next; |
1da177e4 LT |
673 | |
674 | if (!spin_trylock(&mfc_unres_lock)) { | |
0c12295a | 675 | mod_timer(&mrt->ipmr_expire_timer, jiffies+HZ/10); |
1da177e4 LT |
676 | return; |
677 | } | |
678 | ||
0c12295a | 679 | if (list_empty(&mrt->mfc_unres_queue)) |
1da177e4 LT |
680 | goto out; |
681 | ||
682 | now = jiffies; | |
683 | expires = 10*HZ; | |
1da177e4 | 684 | |
0c12295a | 685 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
1da177e4 LT |
686 | if (time_after(c->mfc_un.unres.expires, now)) { |
687 | unsigned long interval = c->mfc_un.unres.expires - now; | |
688 | if (interval < expires) | |
689 | expires = interval; | |
1da177e4 LT |
690 | continue; |
691 | } | |
692 | ||
862465f2 | 693 | list_del(&c->list); |
8cd3ac9f | 694 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 695 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
696 | } |
697 | ||
0c12295a PM |
698 | if (!list_empty(&mrt->mfc_unres_queue)) |
699 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); | |
1da177e4 LT |
700 | |
701 | out: | |
702 | spin_unlock(&mfc_unres_lock); | |
703 | } | |
704 | ||
705 | /* Fill oifs list. It is called under write locked mrt_lock. */ | |
0c12295a | 706 | static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache, |
d658f8a0 | 707 | unsigned char *ttls) |
1da177e4 LT |
708 | { |
709 | int vifi; | |
710 | ||
711 | cache->mfc_un.res.minvif = MAXVIFS; | |
712 | cache->mfc_un.res.maxvif = 0; | |
713 | memset(cache->mfc_un.res.ttls, 255, MAXVIFS); | |
714 | ||
0c12295a PM |
715 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
716 | if (VIF_EXISTS(mrt, vifi) && | |
cf958ae3 | 717 | ttls[vifi] && ttls[vifi] < 255) { |
1da177e4 LT |
718 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
719 | if (cache->mfc_un.res.minvif > vifi) | |
720 | cache->mfc_un.res.minvif = vifi; | |
721 | if (cache->mfc_un.res.maxvif <= vifi) | |
722 | cache->mfc_un.res.maxvif = vifi + 1; | |
723 | } | |
724 | } | |
725 | } | |
726 | ||
0c12295a PM |
727 | static int vif_add(struct net *net, struct mr_table *mrt, |
728 | struct vifctl *vifc, int mrtsock) | |
1da177e4 LT |
729 | { |
730 | int vifi = vifc->vifc_vifi; | |
0c12295a | 731 | struct vif_device *v = &mrt->vif_table[vifi]; |
1da177e4 LT |
732 | struct net_device *dev; |
733 | struct in_device *in_dev; | |
d607032d | 734 | int err; |
1da177e4 LT |
735 | |
736 | /* Is vif busy ? */ | |
0c12295a | 737 | if (VIF_EXISTS(mrt, vifi)) |
1da177e4 LT |
738 | return -EADDRINUSE; |
739 | ||
740 | switch (vifc->vifc_flags) { | |
1da177e4 | 741 | case VIFF_REGISTER: |
1973a4ea | 742 | if (!ipmr_pimsm_enabled()) |
c316c629 NA |
743 | return -EINVAL; |
744 | /* Special Purpose VIF in PIM | |
1da177e4 LT |
745 | * All the packets will be sent to the daemon |
746 | */ | |
0c12295a | 747 | if (mrt->mroute_reg_vif_num >= 0) |
1da177e4 | 748 | return -EADDRINUSE; |
f0ad0860 | 749 | dev = ipmr_reg_vif(net, mrt); |
1da177e4 LT |
750 | if (!dev) |
751 | return -ENOBUFS; | |
d607032d WC |
752 | err = dev_set_allmulti(dev, 1); |
753 | if (err) { | |
754 | unregister_netdevice(dev); | |
7dc00c82 | 755 | dev_put(dev); |
d607032d WC |
756 | return err; |
757 | } | |
1da177e4 | 758 | break; |
e905a9ed | 759 | case VIFF_TUNNEL: |
4feb88e5 | 760 | dev = ipmr_new_tunnel(net, vifc); |
1da177e4 LT |
761 | if (!dev) |
762 | return -ENOBUFS; | |
d607032d WC |
763 | err = dev_set_allmulti(dev, 1); |
764 | if (err) { | |
765 | ipmr_del_tunnel(dev, vifc); | |
7dc00c82 | 766 | dev_put(dev); |
d607032d WC |
767 | return err; |
768 | } | |
1da177e4 | 769 | break; |
ee5e81f0 | 770 | case VIFF_USE_IFINDEX: |
1da177e4 | 771 | case 0: |
ee5e81f0 I |
772 | if (vifc->vifc_flags == VIFF_USE_IFINDEX) { |
773 | dev = dev_get_by_index(net, vifc->vifc_lcl_ifindex); | |
51456b29 | 774 | if (dev && !__in_dev_get_rtnl(dev)) { |
ee5e81f0 I |
775 | dev_put(dev); |
776 | return -EADDRNOTAVAIL; | |
777 | } | |
a8cb16dd | 778 | } else { |
ee5e81f0 | 779 | dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr); |
a8cb16dd | 780 | } |
1da177e4 LT |
781 | if (!dev) |
782 | return -EADDRNOTAVAIL; | |
d607032d | 783 | err = dev_set_allmulti(dev, 1); |
7dc00c82 WC |
784 | if (err) { |
785 | dev_put(dev); | |
d607032d | 786 | return err; |
7dc00c82 | 787 | } |
1da177e4 LT |
788 | break; |
789 | default: | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
a8cb16dd ED |
793 | in_dev = __in_dev_get_rtnl(dev); |
794 | if (!in_dev) { | |
d0490cfd | 795 | dev_put(dev); |
1da177e4 | 796 | return -EADDRNOTAVAIL; |
d0490cfd | 797 | } |
42f811b8 | 798 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; |
d67b8c61 ND |
799 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, dev->ifindex, |
800 | &in_dev->cnf); | |
1da177e4 LT |
801 | ip_rt_multicast_event(in_dev); |
802 | ||
a8cb16dd ED |
803 | /* Fill in the VIF structures */ |
804 | ||
c354e124 JK |
805 | v->rate_limit = vifc->vifc_rate_limit; |
806 | v->local = vifc->vifc_lcl_addr.s_addr; | |
807 | v->remote = vifc->vifc_rmt_addr.s_addr; | |
808 | v->flags = vifc->vifc_flags; | |
1da177e4 LT |
809 | if (!mrtsock) |
810 | v->flags |= VIFF_STATIC; | |
c354e124 | 811 | v->threshold = vifc->vifc_threshold; |
1da177e4 LT |
812 | v->bytes_in = 0; |
813 | v->bytes_out = 0; | |
814 | v->pkt_in = 0; | |
815 | v->pkt_out = 0; | |
816 | v->link = dev->ifindex; | |
a8cb16dd | 817 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER)) |
a54acb3a | 818 | v->link = dev_get_iflink(dev); |
1da177e4 LT |
819 | |
820 | /* And finish update writing critical data */ | |
821 | write_lock_bh(&mrt_lock); | |
c354e124 | 822 | v->dev = dev; |
a8cb16dd | 823 | if (v->flags & VIFF_REGISTER) |
0c12295a | 824 | mrt->mroute_reg_vif_num = vifi; |
0c12295a PM |
825 | if (vifi+1 > mrt->maxvif) |
826 | mrt->maxvif = vifi+1; | |
1da177e4 LT |
827 | write_unlock_bh(&mrt_lock); |
828 | return 0; | |
829 | } | |
830 | ||
a8c9486b | 831 | /* called with rcu_read_lock() */ |
0c12295a | 832 | static struct mfc_cache *ipmr_cache_find(struct mr_table *mrt, |
4feb88e5 BT |
833 | __be32 origin, |
834 | __be32 mcastgrp) | |
1da177e4 | 835 | { |
c354e124 | 836 | int line = MFC_HASH(mcastgrp, origin); |
1da177e4 LT |
837 | struct mfc_cache *c; |
838 | ||
a8c9486b | 839 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) { |
862465f2 PM |
840 | if (c->mfc_origin == origin && c->mfc_mcastgrp == mcastgrp) |
841 | return c; | |
1da177e4 | 842 | } |
862465f2 | 843 | return NULL; |
1da177e4 LT |
844 | } |
845 | ||
660b26dc ND |
846 | /* Look for a (*,*,oif) entry */ |
847 | static struct mfc_cache *ipmr_cache_find_any_parent(struct mr_table *mrt, | |
848 | int vifi) | |
849 | { | |
360eb5da | 850 | int line = MFC_HASH(htonl(INADDR_ANY), htonl(INADDR_ANY)); |
660b26dc ND |
851 | struct mfc_cache *c; |
852 | ||
853 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) | |
360eb5da ND |
854 | if (c->mfc_origin == htonl(INADDR_ANY) && |
855 | c->mfc_mcastgrp == htonl(INADDR_ANY) && | |
660b26dc ND |
856 | c->mfc_un.res.ttls[vifi] < 255) |
857 | return c; | |
858 | ||
859 | return NULL; | |
860 | } | |
861 | ||
862 | /* Look for a (*,G) entry */ | |
863 | static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt, | |
864 | __be32 mcastgrp, int vifi) | |
865 | { | |
360eb5da | 866 | int line = MFC_HASH(mcastgrp, htonl(INADDR_ANY)); |
660b26dc ND |
867 | struct mfc_cache *c, *proxy; |
868 | ||
360eb5da | 869 | if (mcastgrp == htonl(INADDR_ANY)) |
660b26dc ND |
870 | goto skip; |
871 | ||
872 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) | |
360eb5da | 873 | if (c->mfc_origin == htonl(INADDR_ANY) && |
660b26dc ND |
874 | c->mfc_mcastgrp == mcastgrp) { |
875 | if (c->mfc_un.res.ttls[vifi] < 255) | |
876 | return c; | |
877 | ||
878 | /* It's ok if the vifi is part of the static tree */ | |
879 | proxy = ipmr_cache_find_any_parent(mrt, | |
880 | c->mfc_parent); | |
881 | if (proxy && proxy->mfc_un.res.ttls[vifi] < 255) | |
882 | return c; | |
883 | } | |
884 | ||
885 | skip: | |
886 | return ipmr_cache_find_any_parent(mrt, vifi); | |
887 | } | |
888 | ||
7ef8f65d | 889 | /* Allocate a multicast cache entry */ |
d658f8a0 | 890 | static struct mfc_cache *ipmr_cache_alloc(void) |
1da177e4 | 891 | { |
c354e124 | 892 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
a8c9486b ED |
893 | |
894 | if (c) | |
895 | c->mfc_un.res.minvif = MAXVIFS; | |
1da177e4 LT |
896 | return c; |
897 | } | |
898 | ||
d658f8a0 | 899 | static struct mfc_cache *ipmr_cache_alloc_unres(void) |
1da177e4 | 900 | { |
c354e124 | 901 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
a8c9486b ED |
902 | |
903 | if (c) { | |
904 | skb_queue_head_init(&c->mfc_un.unres.unresolved); | |
905 | c->mfc_un.unres.expires = jiffies + 10*HZ; | |
906 | } | |
1da177e4 LT |
907 | return c; |
908 | } | |
909 | ||
7ef8f65d | 910 | /* A cache entry has gone into a resolved state from queued */ |
0c12295a PM |
911 | static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt, |
912 | struct mfc_cache *uc, struct mfc_cache *c) | |
1da177e4 LT |
913 | { |
914 | struct sk_buff *skb; | |
9ef1d4c7 | 915 | struct nlmsgerr *e; |
1da177e4 | 916 | |
a8cb16dd | 917 | /* Play the pending entries through our router */ |
c354e124 | 918 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
eddc9ec5 | 919 | if (ip_hdr(skb)->version == 0) { |
1da177e4 LT |
920 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); |
921 | ||
573ce260 | 922 | if (__ipmr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
a8cb16dd ED |
923 | nlh->nlmsg_len = skb_tail_pointer(skb) - |
924 | (u8 *)nlh; | |
1da177e4 LT |
925 | } else { |
926 | nlh->nlmsg_type = NLMSG_ERROR; | |
573ce260 | 927 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
1da177e4 | 928 | skb_trim(skb, nlh->nlmsg_len); |
573ce260 | 929 | e = nlmsg_data(nlh); |
9ef1d4c7 PM |
930 | e->error = -EMSGSIZE; |
931 | memset(&e->msg, 0, sizeof(e->msg)); | |
1da177e4 | 932 | } |
2942e900 | 933 | |
15e47304 | 934 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
a8cb16dd | 935 | } else { |
0c12295a | 936 | ip_mr_forward(net, mrt, skb, c, 0); |
a8cb16dd | 937 | } |
1da177e4 LT |
938 | } |
939 | } | |
940 | ||
c316c629 NA |
941 | /* Bounce a cache query up to mrouted. We could use netlink for this but mrouted |
942 | * expects the following bizarre scheme. | |
1da177e4 | 943 | * |
c316c629 | 944 | * Called under mrt_lock. |
1da177e4 | 945 | */ |
0c12295a | 946 | static int ipmr_cache_report(struct mr_table *mrt, |
4feb88e5 | 947 | struct sk_buff *pkt, vifi_t vifi, int assert) |
1da177e4 | 948 | { |
c9bdd4b5 | 949 | const int ihl = ip_hdrlen(pkt); |
c316c629 | 950 | struct sock *mroute_sk; |
1da177e4 LT |
951 | struct igmphdr *igmp; |
952 | struct igmpmsg *msg; | |
c316c629 | 953 | struct sk_buff *skb; |
1da177e4 LT |
954 | int ret; |
955 | ||
1da177e4 LT |
956 | if (assert == IGMPMSG_WHOLEPKT) |
957 | skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); | |
958 | else | |
1da177e4 LT |
959 | skb = alloc_skb(128, GFP_ATOMIC); |
960 | ||
132adf54 | 961 | if (!skb) |
1da177e4 LT |
962 | return -ENOBUFS; |
963 | ||
1da177e4 LT |
964 | if (assert == IGMPMSG_WHOLEPKT) { |
965 | /* Ugly, but we have no choice with this interface. | |
a8cb16dd ED |
966 | * Duplicate old header, fix ihl, length etc. |
967 | * And all this only to mangle msg->im_msgtype and | |
968 | * to set msg->im_mbz to "mbz" :-) | |
1da177e4 | 969 | */ |
878c8145 ACM |
970 | skb_push(skb, sizeof(struct iphdr)); |
971 | skb_reset_network_header(skb); | |
badff6d0 | 972 | skb_reset_transport_header(skb); |
0272ffc4 | 973 | msg = (struct igmpmsg *)skb_network_header(skb); |
d56f90a7 | 974 | memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); |
1da177e4 LT |
975 | msg->im_msgtype = IGMPMSG_WHOLEPKT; |
976 | msg->im_mbz = 0; | |
0c12295a | 977 | msg->im_vif = mrt->mroute_reg_vif_num; |
eddc9ec5 ACM |
978 | ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; |
979 | ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + | |
980 | sizeof(struct iphdr)); | |
c316c629 NA |
981 | } else { |
982 | /* Copy the IP header */ | |
983 | skb_set_network_header(skb, skb->len); | |
984 | skb_put(skb, ihl); | |
985 | skb_copy_to_linear_data(skb, pkt->data, ihl); | |
986 | /* Flag to the kernel this is a route add */ | |
987 | ip_hdr(skb)->protocol = 0; | |
988 | msg = (struct igmpmsg *)skb_network_header(skb); | |
989 | msg->im_vif = vifi; | |
990 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); | |
991 | /* Add our header */ | |
992 | igmp = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr)); | |
993 | igmp->type = assert; | |
994 | msg->im_msgtype = assert; | |
995 | igmp->code = 0; | |
996 | ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ | |
997 | skb->transport_header = skb->network_header; | |
e905a9ed | 998 | } |
1da177e4 | 999 | |
4c968709 ED |
1000 | rcu_read_lock(); |
1001 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
51456b29 | 1002 | if (!mroute_sk) { |
4c968709 | 1003 | rcu_read_unlock(); |
1da177e4 LT |
1004 | kfree_skb(skb); |
1005 | return -EINVAL; | |
1006 | } | |
1007 | ||
a8cb16dd | 1008 | /* Deliver to mrouted */ |
4c968709 ED |
1009 | ret = sock_queue_rcv_skb(mroute_sk, skb); |
1010 | rcu_read_unlock(); | |
70a269e6 | 1011 | if (ret < 0) { |
e87cc472 | 1012 | net_warn_ratelimited("mroute: pending queue full, dropping entries\n"); |
1da177e4 LT |
1013 | kfree_skb(skb); |
1014 | } | |
1015 | ||
1016 | return ret; | |
1017 | } | |
1018 | ||
7ef8f65d NA |
1019 | /* Queue a packet for resolution. It gets locked cache entry! */ |
1020 | static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, | |
1021 | struct sk_buff *skb) | |
1da177e4 | 1022 | { |
862465f2 | 1023 | bool found = false; |
1da177e4 LT |
1024 | int err; |
1025 | struct mfc_cache *c; | |
eddc9ec5 | 1026 | const struct iphdr *iph = ip_hdr(skb); |
1da177e4 LT |
1027 | |
1028 | spin_lock_bh(&mfc_unres_lock); | |
0c12295a | 1029 | list_for_each_entry(c, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1030 | if (c->mfc_mcastgrp == iph->daddr && |
862465f2 PM |
1031 | c->mfc_origin == iph->saddr) { |
1032 | found = true; | |
1da177e4 | 1033 | break; |
862465f2 | 1034 | } |
1da177e4 LT |
1035 | } |
1036 | ||
862465f2 | 1037 | if (!found) { |
a8cb16dd | 1038 | /* Create a new entry if allowable */ |
0c12295a | 1039 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
d658f8a0 | 1040 | (c = ipmr_cache_alloc_unres()) == NULL) { |
1da177e4 LT |
1041 | spin_unlock_bh(&mfc_unres_lock); |
1042 | ||
1043 | kfree_skb(skb); | |
1044 | return -ENOBUFS; | |
1045 | } | |
1046 | ||
a8cb16dd | 1047 | /* Fill in the new cache entry */ |
eddc9ec5 ACM |
1048 | c->mfc_parent = -1; |
1049 | c->mfc_origin = iph->saddr; | |
1050 | c->mfc_mcastgrp = iph->daddr; | |
1da177e4 | 1051 | |
a8cb16dd | 1052 | /* Reflect first query at mrouted. */ |
0c12295a | 1053 | err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE); |
4feb88e5 | 1054 | if (err < 0) { |
e905a9ed | 1055 | /* If the report failed throw the cache entry |
1da177e4 LT |
1056 | out - Brad Parker |
1057 | */ | |
1058 | spin_unlock_bh(&mfc_unres_lock); | |
1059 | ||
5c0a66f5 | 1060 | ipmr_cache_free(c); |
1da177e4 LT |
1061 | kfree_skb(skb); |
1062 | return err; | |
1063 | } | |
1064 | ||
0c12295a PM |
1065 | atomic_inc(&mrt->cache_resolve_queue_len); |
1066 | list_add(&c->list, &mrt->mfc_unres_queue); | |
8cd3ac9f | 1067 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 | 1068 | |
278554bd DM |
1069 | if (atomic_read(&mrt->cache_resolve_queue_len) == 1) |
1070 | mod_timer(&mrt->ipmr_expire_timer, c->mfc_un.unres.expires); | |
1da177e4 LT |
1071 | } |
1072 | ||
a8cb16dd | 1073 | /* See if we can append the packet */ |
a8cb16dd | 1074 | if (c->mfc_un.unres.unresolved.qlen > 3) { |
1da177e4 LT |
1075 | kfree_skb(skb); |
1076 | err = -ENOBUFS; | |
1077 | } else { | |
c354e124 | 1078 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); |
1da177e4 LT |
1079 | err = 0; |
1080 | } | |
1081 | ||
1082 | spin_unlock_bh(&mfc_unres_lock); | |
1083 | return err; | |
1084 | } | |
1085 | ||
7ef8f65d | 1086 | /* MFC cache manipulation by user space mroute daemon */ |
1da177e4 | 1087 | |
660b26dc | 1088 | static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent) |
1da177e4 LT |
1089 | { |
1090 | int line; | |
862465f2 | 1091 | struct mfc_cache *c, *next; |
1da177e4 | 1092 | |
c354e124 | 1093 | line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); |
1da177e4 | 1094 | |
0c12295a | 1095 | list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[line], list) { |
1da177e4 | 1096 | if (c->mfc_origin == mfc->mfcc_origin.s_addr && |
660b26dc ND |
1097 | c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr && |
1098 | (parent == -1 || parent == c->mfc_parent)) { | |
a8c9486b | 1099 | list_del_rcu(&c->list); |
8cd3ac9f | 1100 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
5c0a66f5 | 1101 | ipmr_cache_free(c); |
1da177e4 LT |
1102 | return 0; |
1103 | } | |
1104 | } | |
1105 | return -ENOENT; | |
1106 | } | |
1107 | ||
0c12295a | 1108 | static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, |
660b26dc | 1109 | struct mfcctl *mfc, int mrtsock, int parent) |
1da177e4 | 1110 | { |
862465f2 | 1111 | bool found = false; |
1da177e4 | 1112 | int line; |
862465f2 | 1113 | struct mfc_cache *uc, *c; |
1da177e4 | 1114 | |
a50436f2 PM |
1115 | if (mfc->mfcc_parent >= MAXVIFS) |
1116 | return -ENFILE; | |
1117 | ||
c354e124 | 1118 | line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); |
1da177e4 | 1119 | |
0c12295a | 1120 | list_for_each_entry(c, &mrt->mfc_cache_array[line], list) { |
1da177e4 | 1121 | if (c->mfc_origin == mfc->mfcc_origin.s_addr && |
660b26dc ND |
1122 | c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr && |
1123 | (parent == -1 || parent == c->mfc_parent)) { | |
862465f2 | 1124 | found = true; |
1da177e4 | 1125 | break; |
862465f2 | 1126 | } |
1da177e4 LT |
1127 | } |
1128 | ||
862465f2 | 1129 | if (found) { |
1da177e4 LT |
1130 | write_lock_bh(&mrt_lock); |
1131 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1132 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1133 | if (!mrtsock) |
1134 | c->mfc_flags |= MFC_STATIC; | |
1135 | write_unlock_bh(&mrt_lock); | |
8cd3ac9f | 1136 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1137 | return 0; |
1138 | } | |
1139 | ||
360eb5da | 1140 | if (mfc->mfcc_mcastgrp.s_addr != htonl(INADDR_ANY) && |
660b26dc | 1141 | !ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) |
1da177e4 LT |
1142 | return -EINVAL; |
1143 | ||
d658f8a0 | 1144 | c = ipmr_cache_alloc(); |
51456b29 | 1145 | if (!c) |
1da177e4 LT |
1146 | return -ENOMEM; |
1147 | ||
c354e124 JK |
1148 | c->mfc_origin = mfc->mfcc_origin.s_addr; |
1149 | c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; | |
1150 | c->mfc_parent = mfc->mfcc_parent; | |
0c12295a | 1151 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
1da177e4 LT |
1152 | if (!mrtsock) |
1153 | c->mfc_flags |= MFC_STATIC; | |
1154 | ||
a8c9486b | 1155 | list_add_rcu(&c->list, &mrt->mfc_cache_array[line]); |
1da177e4 | 1156 | |
7ef8f65d NA |
1157 | /* Check to see if we resolved a queued list. If so we |
1158 | * need to send on the frames and tidy up. | |
1da177e4 | 1159 | */ |
b0ebb739 | 1160 | found = false; |
1da177e4 | 1161 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 1162 | list_for_each_entry(uc, &mrt->mfc_unres_queue, list) { |
e258beb2 | 1163 | if (uc->mfc_origin == c->mfc_origin && |
1da177e4 | 1164 | uc->mfc_mcastgrp == c->mfc_mcastgrp) { |
862465f2 | 1165 | list_del(&uc->list); |
0c12295a | 1166 | atomic_dec(&mrt->cache_resolve_queue_len); |
b0ebb739 | 1167 | found = true; |
1da177e4 LT |
1168 | break; |
1169 | } | |
1170 | } | |
0c12295a PM |
1171 | if (list_empty(&mrt->mfc_unres_queue)) |
1172 | del_timer(&mrt->ipmr_expire_timer); | |
1da177e4 LT |
1173 | spin_unlock_bh(&mfc_unres_lock); |
1174 | ||
b0ebb739 | 1175 | if (found) { |
0c12295a | 1176 | ipmr_cache_resolve(net, mrt, uc, c); |
5c0a66f5 | 1177 | ipmr_cache_free(uc); |
1da177e4 | 1178 | } |
8cd3ac9f | 1179 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
1da177e4 LT |
1180 | return 0; |
1181 | } | |
1182 | ||
7ef8f65d | 1183 | /* Close the multicast socket, and clear the vif tables etc */ |
0e615e96 | 1184 | static void mroute_clean_tables(struct mr_table *mrt, bool all) |
1da177e4 LT |
1185 | { |
1186 | int i; | |
d17fa6fa | 1187 | LIST_HEAD(list); |
862465f2 | 1188 | struct mfc_cache *c, *next; |
e905a9ed | 1189 | |
a8cb16dd | 1190 | /* Shut down all active vif entries */ |
0c12295a | 1191 | for (i = 0; i < mrt->maxvif; i++) { |
0e615e96 NA |
1192 | if (!all && (mrt->vif_table[i].flags & VIFF_STATIC)) |
1193 | continue; | |
1194 | vif_delete(mrt, i, 0, &list); | |
1da177e4 | 1195 | } |
d17fa6fa | 1196 | unregister_netdevice_many(&list); |
1da177e4 | 1197 | |
a8cb16dd | 1198 | /* Wipe the cache */ |
862465f2 | 1199 | for (i = 0; i < MFC_LINES; i++) { |
0c12295a | 1200 | list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) { |
0e615e96 | 1201 | if (!all && (c->mfc_flags & MFC_STATIC)) |
1da177e4 | 1202 | continue; |
a8c9486b | 1203 | list_del_rcu(&c->list); |
8cd3ac9f | 1204 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
5c0a66f5 | 1205 | ipmr_cache_free(c); |
1da177e4 LT |
1206 | } |
1207 | } | |
1208 | ||
0c12295a | 1209 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
1da177e4 | 1210 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 1211 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
862465f2 | 1212 | list_del(&c->list); |
8cd3ac9f | 1213 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
0c12295a | 1214 | ipmr_destroy_unres(mrt, c); |
1da177e4 LT |
1215 | } |
1216 | spin_unlock_bh(&mfc_unres_lock); | |
1217 | } | |
1218 | } | |
1219 | ||
4c968709 ED |
1220 | /* called from ip_ra_control(), before an RCU grace period, |
1221 | * we dont need to call synchronize_rcu() here | |
1222 | */ | |
1da177e4 LT |
1223 | static void mrtsock_destruct(struct sock *sk) |
1224 | { | |
4feb88e5 | 1225 | struct net *net = sock_net(sk); |
f0ad0860 | 1226 | struct mr_table *mrt; |
4feb88e5 | 1227 | |
1da177e4 | 1228 | rtnl_lock(); |
f0ad0860 | 1229 | ipmr_for_each_table(mrt, net) { |
4c968709 | 1230 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
f0ad0860 | 1231 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)--; |
d67b8c61 ND |
1232 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
1233 | NETCONFA_IFINDEX_ALL, | |
1234 | net->ipv4.devconf_all); | |
a9b3cd7f | 1235 | RCU_INIT_POINTER(mrt->mroute_sk, NULL); |
0e615e96 | 1236 | mroute_clean_tables(mrt, false); |
f0ad0860 | 1237 | } |
1da177e4 LT |
1238 | } |
1239 | rtnl_unlock(); | |
1240 | } | |
1241 | ||
7ef8f65d NA |
1242 | /* Socket options and virtual interface manipulation. The whole |
1243 | * virtual interface system is a complete heap, but unfortunately | |
1244 | * that's how BSD mrouted happens to think. Maybe one day with a proper | |
1245 | * MOSPF/PIM router set up we can clean this up. | |
1da177e4 | 1246 | */ |
e905a9ed | 1247 | |
29e97d21 NA |
1248 | int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, |
1249 | unsigned int optlen) | |
1da177e4 | 1250 | { |
4feb88e5 | 1251 | struct net *net = sock_net(sk); |
29e97d21 | 1252 | int val, ret = 0, parent = 0; |
f0ad0860 | 1253 | struct mr_table *mrt; |
29e97d21 NA |
1254 | struct vifctl vif; |
1255 | struct mfcctl mfc; | |
1256 | u32 uval; | |
f0ad0860 | 1257 | |
29e97d21 NA |
1258 | /* There's one exception to the lock - MRT_DONE which needs to unlock */ |
1259 | rtnl_lock(); | |
5e1859fb | 1260 | if (sk->sk_type != SOCK_RAW || |
29e97d21 NA |
1261 | inet_sk(sk)->inet_num != IPPROTO_IGMP) { |
1262 | ret = -EOPNOTSUPP; | |
1263 | goto out_unlock; | |
1264 | } | |
5e1859fb | 1265 | |
f0ad0860 | 1266 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
29e97d21 NA |
1267 | if (!mrt) { |
1268 | ret = -ENOENT; | |
1269 | goto out_unlock; | |
1270 | } | |
132adf54 | 1271 | if (optname != MRT_INIT) { |
33d480ce | 1272 | if (sk != rcu_access_pointer(mrt->mroute_sk) && |
29e97d21 NA |
1273 | !ns_capable(net->user_ns, CAP_NET_ADMIN)) { |
1274 | ret = -EACCES; | |
1275 | goto out_unlock; | |
1276 | } | |
1da177e4 LT |
1277 | } |
1278 | ||
132adf54 SH |
1279 | switch (optname) { |
1280 | case MRT_INIT: | |
42e6b89c | 1281 | if (optlen != sizeof(int)) { |
29e97d21 | 1282 | ret = -EINVAL; |
42e6b89c NA |
1283 | break; |
1284 | } | |
1285 | if (rtnl_dereference(mrt->mroute_sk)) { | |
29e97d21 | 1286 | ret = -EADDRINUSE; |
29e97d21 | 1287 | break; |
42e6b89c | 1288 | } |
132adf54 SH |
1289 | |
1290 | ret = ip_ra_control(sk, 1, mrtsock_destruct); | |
1291 | if (ret == 0) { | |
cf778b00 | 1292 | rcu_assign_pointer(mrt->mroute_sk, sk); |
4feb88e5 | 1293 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)++; |
d67b8c61 ND |
1294 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
1295 | NETCONFA_IFINDEX_ALL, | |
1296 | net->ipv4.devconf_all); | |
132adf54 | 1297 | } |
29e97d21 | 1298 | break; |
132adf54 | 1299 | case MRT_DONE: |
29e97d21 NA |
1300 | if (sk != rcu_access_pointer(mrt->mroute_sk)) { |
1301 | ret = -EACCES; | |
1302 | } else { | |
1303 | /* We need to unlock here because mrtsock_destruct takes | |
1304 | * care of rtnl itself and we can't change that due to | |
1305 | * the IP_ROUTER_ALERT setsockopt which runs without it. | |
1306 | */ | |
1307 | rtnl_unlock(); | |
1308 | ret = ip_ra_control(sk, 0, NULL); | |
1309 | goto out; | |
1310 | } | |
1311 | break; | |
132adf54 SH |
1312 | case MRT_ADD_VIF: |
1313 | case MRT_DEL_VIF: | |
29e97d21 NA |
1314 | if (optlen != sizeof(vif)) { |
1315 | ret = -EINVAL; | |
1316 | break; | |
1317 | } | |
1318 | if (copy_from_user(&vif, optval, sizeof(vif))) { | |
1319 | ret = -EFAULT; | |
1320 | break; | |
1321 | } | |
1322 | if (vif.vifc_vifi >= MAXVIFS) { | |
1323 | ret = -ENFILE; | |
1324 | break; | |
1325 | } | |
c354e124 | 1326 | if (optname == MRT_ADD_VIF) { |
4c968709 ED |
1327 | ret = vif_add(net, mrt, &vif, |
1328 | sk == rtnl_dereference(mrt->mroute_sk)); | |
132adf54 | 1329 | } else { |
0c12295a | 1330 | ret = vif_delete(mrt, vif.vifc_vifi, 0, NULL); |
132adf54 | 1331 | } |
29e97d21 | 1332 | break; |
7ef8f65d NA |
1333 | /* Manipulate the forwarding caches. These live |
1334 | * in a sort of kernel/user symbiosis. | |
1335 | */ | |
132adf54 SH |
1336 | case MRT_ADD_MFC: |
1337 | case MRT_DEL_MFC: | |
660b26dc ND |
1338 | parent = -1; |
1339 | case MRT_ADD_MFC_PROXY: | |
1340 | case MRT_DEL_MFC_PROXY: | |
29e97d21 NA |
1341 | if (optlen != sizeof(mfc)) { |
1342 | ret = -EINVAL; | |
1343 | break; | |
1344 | } | |
1345 | if (copy_from_user(&mfc, optval, sizeof(mfc))) { | |
1346 | ret = -EFAULT; | |
1347 | break; | |
1348 | } | |
660b26dc ND |
1349 | if (parent == 0) |
1350 | parent = mfc.mfcc_parent; | |
660b26dc ND |
1351 | if (optname == MRT_DEL_MFC || optname == MRT_DEL_MFC_PROXY) |
1352 | ret = ipmr_mfc_delete(mrt, &mfc, parent); | |
132adf54 | 1353 | else |
4c968709 | 1354 | ret = ipmr_mfc_add(net, mrt, &mfc, |
660b26dc ND |
1355 | sk == rtnl_dereference(mrt->mroute_sk), |
1356 | parent); | |
29e97d21 | 1357 | break; |
7ef8f65d | 1358 | /* Control PIM assert. */ |
132adf54 | 1359 | case MRT_ASSERT: |
29e97d21 NA |
1360 | if (optlen != sizeof(val)) { |
1361 | ret = -EINVAL; | |
1362 | break; | |
1363 | } | |
1364 | if (get_user(val, (int __user *)optval)) { | |
1365 | ret = -EFAULT; | |
1366 | break; | |
1367 | } | |
1368 | mrt->mroute_do_assert = val; | |
1369 | break; | |
132adf54 | 1370 | case MRT_PIM: |
1973a4ea | 1371 | if (!ipmr_pimsm_enabled()) { |
29e97d21 NA |
1372 | ret = -ENOPROTOOPT; |
1373 | break; | |
1374 | } | |
1375 | if (optlen != sizeof(val)) { | |
1376 | ret = -EINVAL; | |
1377 | break; | |
1378 | } | |
1379 | if (get_user(val, (int __user *)optval)) { | |
1380 | ret = -EFAULT; | |
1381 | break; | |
1382 | } | |
ba93ef74 | 1383 | |
29e97d21 NA |
1384 | val = !!val; |
1385 | if (val != mrt->mroute_do_pim) { | |
1386 | mrt->mroute_do_pim = val; | |
1387 | mrt->mroute_do_assert = val; | |
1da177e4 | 1388 | } |
29e97d21 | 1389 | break; |
f0ad0860 | 1390 | case MRT_TABLE: |
29e97d21 NA |
1391 | if (!IS_BUILTIN(CONFIG_IP_MROUTE_MULTIPLE_TABLES)) { |
1392 | ret = -ENOPROTOOPT; | |
1393 | break; | |
1394 | } | |
1395 | if (optlen != sizeof(uval)) { | |
1396 | ret = -EINVAL; | |
1397 | break; | |
1398 | } | |
1399 | if (get_user(uval, (u32 __user *)optval)) { | |
1400 | ret = -EFAULT; | |
1401 | break; | |
1402 | } | |
f0ad0860 | 1403 | |
4c968709 ED |
1404 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
1405 | ret = -EBUSY; | |
1406 | } else { | |
29e97d21 | 1407 | mrt = ipmr_new_table(net, uval); |
1113ebbc NA |
1408 | if (IS_ERR(mrt)) |
1409 | ret = PTR_ERR(mrt); | |
5e1859fb | 1410 | else |
29e97d21 | 1411 | raw_sk(sk)->ipmr_table = uval; |
4c968709 | 1412 | } |
29e97d21 | 1413 | break; |
7ef8f65d | 1414 | /* Spurious command, or MRT_VERSION which you cannot set. */ |
132adf54 | 1415 | default: |
29e97d21 | 1416 | ret = -ENOPROTOOPT; |
1da177e4 | 1417 | } |
29e97d21 NA |
1418 | out_unlock: |
1419 | rtnl_unlock(); | |
1420 | out: | |
1421 | return ret; | |
1da177e4 LT |
1422 | } |
1423 | ||
7ef8f65d | 1424 | /* Getsock opt support for the multicast routing system. */ |
c354e124 | 1425 | int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
1426 | { |
1427 | int olr; | |
1428 | int val; | |
4feb88e5 | 1429 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1430 | struct mr_table *mrt; |
1431 | ||
5e1859fb ED |
1432 | if (sk->sk_type != SOCK_RAW || |
1433 | inet_sk(sk)->inet_num != IPPROTO_IGMP) | |
1434 | return -EOPNOTSUPP; | |
1435 | ||
f0ad0860 | 1436 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
51456b29 | 1437 | if (!mrt) |
f0ad0860 | 1438 | return -ENOENT; |
1da177e4 | 1439 | |
fe9ef3ce NA |
1440 | switch (optname) { |
1441 | case MRT_VERSION: | |
1442 | val = 0x0305; | |
1443 | break; | |
1444 | case MRT_PIM: | |
1973a4ea | 1445 | if (!ipmr_pimsm_enabled()) |
fe9ef3ce NA |
1446 | return -ENOPROTOOPT; |
1447 | val = mrt->mroute_do_pim; | |
1448 | break; | |
1449 | case MRT_ASSERT: | |
1450 | val = mrt->mroute_do_assert; | |
1451 | break; | |
1452 | default: | |
1da177e4 | 1453 | return -ENOPROTOOPT; |
fe9ef3ce | 1454 | } |
1da177e4 LT |
1455 | |
1456 | if (get_user(olr, optlen)) | |
1457 | return -EFAULT; | |
1da177e4 LT |
1458 | olr = min_t(unsigned int, olr, sizeof(int)); |
1459 | if (olr < 0) | |
1460 | return -EINVAL; | |
c354e124 | 1461 | if (put_user(olr, optlen)) |
1da177e4 | 1462 | return -EFAULT; |
c354e124 | 1463 | if (copy_to_user(optval, &val, olr)) |
1da177e4 LT |
1464 | return -EFAULT; |
1465 | return 0; | |
1466 | } | |
1467 | ||
7ef8f65d | 1468 | /* The IP multicast ioctl support routines. */ |
1da177e4 LT |
1469 | int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) |
1470 | { | |
1471 | struct sioc_sg_req sr; | |
1472 | struct sioc_vif_req vr; | |
1473 | struct vif_device *vif; | |
1474 | struct mfc_cache *c; | |
4feb88e5 | 1475 | struct net *net = sock_net(sk); |
f0ad0860 PM |
1476 | struct mr_table *mrt; |
1477 | ||
1478 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1479 | if (!mrt) |
f0ad0860 | 1480 | return -ENOENT; |
e905a9ed | 1481 | |
132adf54 SH |
1482 | switch (cmd) { |
1483 | case SIOCGETVIFCNT: | |
c354e124 | 1484 | if (copy_from_user(&vr, arg, sizeof(vr))) |
132adf54 | 1485 | return -EFAULT; |
0c12295a | 1486 | if (vr.vifi >= mrt->maxvif) |
132adf54 SH |
1487 | return -EINVAL; |
1488 | read_lock(&mrt_lock); | |
0c12295a PM |
1489 | vif = &mrt->vif_table[vr.vifi]; |
1490 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
c354e124 JK |
1491 | vr.icount = vif->pkt_in; |
1492 | vr.ocount = vif->pkt_out; | |
1493 | vr.ibytes = vif->bytes_in; | |
1494 | vr.obytes = vif->bytes_out; | |
1da177e4 | 1495 | read_unlock(&mrt_lock); |
1da177e4 | 1496 | |
c354e124 | 1497 | if (copy_to_user(arg, &vr, sizeof(vr))) |
132adf54 SH |
1498 | return -EFAULT; |
1499 | return 0; | |
1500 | } | |
1501 | read_unlock(&mrt_lock); | |
1502 | return -EADDRNOTAVAIL; | |
1503 | case SIOCGETSGCNT: | |
c354e124 | 1504 | if (copy_from_user(&sr, arg, sizeof(sr))) |
132adf54 SH |
1505 | return -EFAULT; |
1506 | ||
a8c9486b | 1507 | rcu_read_lock(); |
0c12295a | 1508 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); |
132adf54 SH |
1509 | if (c) { |
1510 | sr.pktcnt = c->mfc_un.res.pkt; | |
1511 | sr.bytecnt = c->mfc_un.res.bytes; | |
1512 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
a8c9486b | 1513 | rcu_read_unlock(); |
132adf54 | 1514 | |
c354e124 | 1515 | if (copy_to_user(arg, &sr, sizeof(sr))) |
132adf54 SH |
1516 | return -EFAULT; |
1517 | return 0; | |
1518 | } | |
a8c9486b | 1519 | rcu_read_unlock(); |
132adf54 SH |
1520 | return -EADDRNOTAVAIL; |
1521 | default: | |
1522 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1523 | } |
1524 | } | |
1525 | ||
709b46e8 EB |
1526 | #ifdef CONFIG_COMPAT |
1527 | struct compat_sioc_sg_req { | |
1528 | struct in_addr src; | |
1529 | struct in_addr grp; | |
1530 | compat_ulong_t pktcnt; | |
1531 | compat_ulong_t bytecnt; | |
1532 | compat_ulong_t wrong_if; | |
1533 | }; | |
1534 | ||
ca6b8bb0 DM |
1535 | struct compat_sioc_vif_req { |
1536 | vifi_t vifi; /* Which iface */ | |
1537 | compat_ulong_t icount; | |
1538 | compat_ulong_t ocount; | |
1539 | compat_ulong_t ibytes; | |
1540 | compat_ulong_t obytes; | |
1541 | }; | |
1542 | ||
709b46e8 EB |
1543 | int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
1544 | { | |
0033d5ad | 1545 | struct compat_sioc_sg_req sr; |
ca6b8bb0 DM |
1546 | struct compat_sioc_vif_req vr; |
1547 | struct vif_device *vif; | |
709b46e8 EB |
1548 | struct mfc_cache *c; |
1549 | struct net *net = sock_net(sk); | |
1550 | struct mr_table *mrt; | |
1551 | ||
1552 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); | |
51456b29 | 1553 | if (!mrt) |
709b46e8 EB |
1554 | return -ENOENT; |
1555 | ||
1556 | switch (cmd) { | |
ca6b8bb0 DM |
1557 | case SIOCGETVIFCNT: |
1558 | if (copy_from_user(&vr, arg, sizeof(vr))) | |
1559 | return -EFAULT; | |
1560 | if (vr.vifi >= mrt->maxvif) | |
1561 | return -EINVAL; | |
1562 | read_lock(&mrt_lock); | |
1563 | vif = &mrt->vif_table[vr.vifi]; | |
1564 | if (VIF_EXISTS(mrt, vr.vifi)) { | |
1565 | vr.icount = vif->pkt_in; | |
1566 | vr.ocount = vif->pkt_out; | |
1567 | vr.ibytes = vif->bytes_in; | |
1568 | vr.obytes = vif->bytes_out; | |
1569 | read_unlock(&mrt_lock); | |
1570 | ||
1571 | if (copy_to_user(arg, &vr, sizeof(vr))) | |
1572 | return -EFAULT; | |
1573 | return 0; | |
1574 | } | |
1575 | read_unlock(&mrt_lock); | |
1576 | return -EADDRNOTAVAIL; | |
709b46e8 EB |
1577 | case SIOCGETSGCNT: |
1578 | if (copy_from_user(&sr, arg, sizeof(sr))) | |
1579 | return -EFAULT; | |
1580 | ||
1581 | rcu_read_lock(); | |
1582 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); | |
1583 | if (c) { | |
1584 | sr.pktcnt = c->mfc_un.res.pkt; | |
1585 | sr.bytecnt = c->mfc_un.res.bytes; | |
1586 | sr.wrong_if = c->mfc_un.res.wrong_if; | |
1587 | rcu_read_unlock(); | |
1588 | ||
1589 | if (copy_to_user(arg, &sr, sizeof(sr))) | |
1590 | return -EFAULT; | |
1591 | return 0; | |
1592 | } | |
1593 | rcu_read_unlock(); | |
1594 | return -EADDRNOTAVAIL; | |
1595 | default: | |
1596 | return -ENOIOCTLCMD; | |
1597 | } | |
1598 | } | |
1599 | #endif | |
1600 | ||
1da177e4 LT |
1601 | static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
1602 | { | |
351638e7 | 1603 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4feb88e5 | 1604 | struct net *net = dev_net(dev); |
f0ad0860 | 1605 | struct mr_table *mrt; |
1da177e4 LT |
1606 | struct vif_device *v; |
1607 | int ct; | |
e9dc8653 | 1608 | |
1da177e4 LT |
1609 | if (event != NETDEV_UNREGISTER) |
1610 | return NOTIFY_DONE; | |
f0ad0860 PM |
1611 | |
1612 | ipmr_for_each_table(mrt, net) { | |
1613 | v = &mrt->vif_table[0]; | |
1614 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { | |
1615 | if (v->dev == dev) | |
e92036a6 | 1616 | vif_delete(mrt, ct, 1, NULL); |
f0ad0860 | 1617 | } |
1da177e4 LT |
1618 | } |
1619 | return NOTIFY_DONE; | |
1620 | } | |
1621 | ||
c354e124 | 1622 | static struct notifier_block ip_mr_notifier = { |
1da177e4 LT |
1623 | .notifier_call = ipmr_device_event, |
1624 | }; | |
1625 | ||
7ef8f65d NA |
1626 | /* Encapsulate a packet by attaching a valid IPIP header to it. |
1627 | * This avoids tunnel drivers and other mess and gives us the speed so | |
1628 | * important for multicast video. | |
1da177e4 | 1629 | */ |
b6a7719a HFS |
1630 | static void ip_encap(struct net *net, struct sk_buff *skb, |
1631 | __be32 saddr, __be32 daddr) | |
1da177e4 | 1632 | { |
8856dfa3 | 1633 | struct iphdr *iph; |
b71d1d42 | 1634 | const struct iphdr *old_iph = ip_hdr(skb); |
8856dfa3 ACM |
1635 | |
1636 | skb_push(skb, sizeof(struct iphdr)); | |
b0e380b1 | 1637 | skb->transport_header = skb->network_header; |
8856dfa3 | 1638 | skb_reset_network_header(skb); |
eddc9ec5 | 1639 | iph = ip_hdr(skb); |
1da177e4 | 1640 | |
a8cb16dd | 1641 | iph->version = 4; |
e023dd64 ACM |
1642 | iph->tos = old_iph->tos; |
1643 | iph->ttl = old_iph->ttl; | |
1da177e4 LT |
1644 | iph->frag_off = 0; |
1645 | iph->daddr = daddr; | |
1646 | iph->saddr = saddr; | |
1647 | iph->protocol = IPPROTO_IPIP; | |
1648 | iph->ihl = 5; | |
1649 | iph->tot_len = htons(skb->len); | |
b6a7719a | 1650 | ip_select_ident(net, skb, NULL); |
1da177e4 LT |
1651 | ip_send_check(iph); |
1652 | ||
1da177e4 LT |
1653 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
1654 | nf_reset(skb); | |
1655 | } | |
1656 | ||
0c4b51f0 EB |
1657 | static inline int ipmr_forward_finish(struct net *net, struct sock *sk, |
1658 | struct sk_buff *skb) | |
1da177e4 | 1659 | { |
a8cb16dd | 1660 | struct ip_options *opt = &(IPCB(skb)->opt); |
1da177e4 | 1661 | |
73186df8 DM |
1662 | IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS); |
1663 | IP_ADD_STATS(net, IPSTATS_MIB_OUTOCTETS, skb->len); | |
1da177e4 LT |
1664 | |
1665 | if (unlikely(opt->optlen)) | |
1666 | ip_forward_options(skb); | |
1667 | ||
13206b6b | 1668 | return dst_output(net, sk, skb); |
1da177e4 LT |
1669 | } |
1670 | ||
7ef8f65d | 1671 | /* Processing handlers for ipmr_forward */ |
1da177e4 | 1672 | |
0c12295a PM |
1673 | static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt, |
1674 | struct sk_buff *skb, struct mfc_cache *c, int vifi) | |
1da177e4 | 1675 | { |
eddc9ec5 | 1676 | const struct iphdr *iph = ip_hdr(skb); |
0c12295a | 1677 | struct vif_device *vif = &mrt->vif_table[vifi]; |
1da177e4 LT |
1678 | struct net_device *dev; |
1679 | struct rtable *rt; | |
31e4543d | 1680 | struct flowi4 fl4; |
1da177e4 LT |
1681 | int encap = 0; |
1682 | ||
51456b29 | 1683 | if (!vif->dev) |
1da177e4 LT |
1684 | goto out_free; |
1685 | ||
1da177e4 LT |
1686 | if (vif->flags & VIFF_REGISTER) { |
1687 | vif->pkt_out++; | |
c354e124 | 1688 | vif->bytes_out += skb->len; |
cf3677ae PE |
1689 | vif->dev->stats.tx_bytes += skb->len; |
1690 | vif->dev->stats.tx_packets++; | |
0c12295a | 1691 | ipmr_cache_report(mrt, skb, vifi, IGMPMSG_WHOLEPKT); |
69ebbf58 | 1692 | goto out_free; |
1da177e4 | 1693 | } |
1da177e4 | 1694 | |
a8cb16dd | 1695 | if (vif->flags & VIFF_TUNNEL) { |
31e4543d | 1696 | rt = ip_route_output_ports(net, &fl4, NULL, |
78fbfd8a DM |
1697 | vif->remote, vif->local, |
1698 | 0, 0, | |
1699 | IPPROTO_IPIP, | |
1700 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1701 | if (IS_ERR(rt)) |
1da177e4 LT |
1702 | goto out_free; |
1703 | encap = sizeof(struct iphdr); | |
1704 | } else { | |
31e4543d | 1705 | rt = ip_route_output_ports(net, &fl4, NULL, iph->daddr, 0, |
78fbfd8a DM |
1706 | 0, 0, |
1707 | IPPROTO_IPIP, | |
1708 | RT_TOS(iph->tos), vif->link); | |
b23dd4fe | 1709 | if (IS_ERR(rt)) |
1da177e4 LT |
1710 | goto out_free; |
1711 | } | |
1712 | ||
d8d1f30b | 1713 | dev = rt->dst.dev; |
1da177e4 | 1714 | |
d8d1f30b | 1715 | if (skb->len+encap > dst_mtu(&rt->dst) && (ntohs(iph->frag_off) & IP_DF)) { |
1da177e4 | 1716 | /* Do not fragment multicasts. Alas, IPv4 does not |
a8cb16dd ED |
1717 | * allow to send ICMP, so that packets will disappear |
1718 | * to blackhole. | |
1da177e4 | 1719 | */ |
73186df8 | 1720 | IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS); |
1da177e4 LT |
1721 | ip_rt_put(rt); |
1722 | goto out_free; | |
1723 | } | |
1724 | ||
d8d1f30b | 1725 | encap += LL_RESERVED_SPACE(dev) + rt->dst.header_len; |
1da177e4 LT |
1726 | |
1727 | if (skb_cow(skb, encap)) { | |
e905a9ed | 1728 | ip_rt_put(rt); |
1da177e4 LT |
1729 | goto out_free; |
1730 | } | |
1731 | ||
1732 | vif->pkt_out++; | |
c354e124 | 1733 | vif->bytes_out += skb->len; |
1da177e4 | 1734 | |
adf30907 | 1735 | skb_dst_drop(skb); |
d8d1f30b | 1736 | skb_dst_set(skb, &rt->dst); |
eddc9ec5 | 1737 | ip_decrease_ttl(ip_hdr(skb)); |
1da177e4 LT |
1738 | |
1739 | /* FIXME: forward and output firewalls used to be called here. | |
a8cb16dd ED |
1740 | * What do we do with netfilter? -- RR |
1741 | */ | |
1da177e4 | 1742 | if (vif->flags & VIFF_TUNNEL) { |
b6a7719a | 1743 | ip_encap(net, skb, vif->local, vif->remote); |
1da177e4 | 1744 | /* FIXME: extra output firewall step used to be here. --RR */ |
2f4c02d4 PE |
1745 | vif->dev->stats.tx_packets++; |
1746 | vif->dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1747 | } |
1748 | ||
1749 | IPCB(skb)->flags |= IPSKB_FORWARDED; | |
1750 | ||
7ef8f65d | 1751 | /* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally |
1da177e4 LT |
1752 | * not only before forwarding, but after forwarding on all output |
1753 | * interfaces. It is clear, if mrouter runs a multicasting | |
1754 | * program, it should receive packets not depending to what interface | |
1755 | * program is joined. | |
1756 | * If we will not make it, the program will have to join on all | |
1757 | * interfaces. On the other hand, multihoming host (or router, but | |
1758 | * not mrouter) cannot join to more than one interface - it will | |
1759 | * result in receiving multiple packets. | |
1760 | */ | |
29a26a56 EB |
1761 | NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, |
1762 | net, NULL, skb, skb->dev, dev, | |
1da177e4 LT |
1763 | ipmr_forward_finish); |
1764 | return; | |
1765 | ||
1766 | out_free: | |
1767 | kfree_skb(skb); | |
1da177e4 LT |
1768 | } |
1769 | ||
0c12295a | 1770 | static int ipmr_find_vif(struct mr_table *mrt, struct net_device *dev) |
1da177e4 LT |
1771 | { |
1772 | int ct; | |
0c12295a PM |
1773 | |
1774 | for (ct = mrt->maxvif-1; ct >= 0; ct--) { | |
1775 | if (mrt->vif_table[ct].dev == dev) | |
1da177e4 LT |
1776 | break; |
1777 | } | |
1778 | return ct; | |
1779 | } | |
1780 | ||
1781 | /* "local" means that we should preserve one skb (for local delivery) */ | |
c4854ec8 RR |
1782 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
1783 | struct sk_buff *skb, struct mfc_cache *cache, | |
1784 | int local) | |
1da177e4 LT |
1785 | { |
1786 | int psend = -1; | |
1787 | int vif, ct; | |
660b26dc | 1788 | int true_vifi = ipmr_find_vif(mrt, skb->dev); |
1da177e4 LT |
1789 | |
1790 | vif = cache->mfc_parent; | |
1791 | cache->mfc_un.res.pkt++; | |
1792 | cache->mfc_un.res.bytes += skb->len; | |
1793 | ||
360eb5da | 1794 | if (cache->mfc_origin == htonl(INADDR_ANY) && true_vifi >= 0) { |
660b26dc ND |
1795 | struct mfc_cache *cache_proxy; |
1796 | ||
1797 | /* For an (*,G) entry, we only check that the incomming | |
1798 | * interface is part of the static tree. | |
1799 | */ | |
1800 | cache_proxy = ipmr_cache_find_any_parent(mrt, vif); | |
1801 | if (cache_proxy && | |
1802 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) | |
1803 | goto forward; | |
1804 | } | |
1805 | ||
7ef8f65d | 1806 | /* Wrong interface: drop packet and (maybe) send PIM assert. */ |
0c12295a | 1807 | if (mrt->vif_table[vif].dev != skb->dev) { |
c7537967 | 1808 | if (rt_is_output_route(skb_rtable(skb))) { |
1da177e4 | 1809 | /* It is our own packet, looped back. |
a8cb16dd ED |
1810 | * Very complicated situation... |
1811 | * | |
1812 | * The best workaround until routing daemons will be | |
1813 | * fixed is not to redistribute packet, if it was | |
1814 | * send through wrong interface. It means, that | |
1815 | * multicast applications WILL NOT work for | |
1816 | * (S,G), which have default multicast route pointing | |
1817 | * to wrong oif. In any case, it is not a good | |
1818 | * idea to use multicasting applications on router. | |
1da177e4 LT |
1819 | */ |
1820 | goto dont_forward; | |
1821 | } | |
1822 | ||
1823 | cache->mfc_un.res.wrong_if++; | |
1da177e4 | 1824 | |
0c12295a | 1825 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
1da177e4 | 1826 | /* pimsm uses asserts, when switching from RPT to SPT, |
a8cb16dd ED |
1827 | * so that we cannot check that packet arrived on an oif. |
1828 | * It is bad, but otherwise we would need to move pretty | |
1829 | * large chunk of pimd to kernel. Ough... --ANK | |
1da177e4 | 1830 | */ |
0c12295a | 1831 | (mrt->mroute_do_pim || |
6f9374a9 | 1832 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
e905a9ed | 1833 | time_after(jiffies, |
1da177e4 LT |
1834 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { |
1835 | cache->mfc_un.res.last_assert = jiffies; | |
0c12295a | 1836 | ipmr_cache_report(mrt, skb, true_vifi, IGMPMSG_WRONGVIF); |
1da177e4 LT |
1837 | } |
1838 | goto dont_forward; | |
1839 | } | |
1840 | ||
660b26dc | 1841 | forward: |
0c12295a PM |
1842 | mrt->vif_table[vif].pkt_in++; |
1843 | mrt->vif_table[vif].bytes_in += skb->len; | |
1da177e4 | 1844 | |
7ef8f65d | 1845 | /* Forward the frame */ |
360eb5da ND |
1846 | if (cache->mfc_origin == htonl(INADDR_ANY) && |
1847 | cache->mfc_mcastgrp == htonl(INADDR_ANY)) { | |
660b26dc ND |
1848 | if (true_vifi >= 0 && |
1849 | true_vifi != cache->mfc_parent && | |
1850 | ip_hdr(skb)->ttl > | |
1851 | cache->mfc_un.res.ttls[cache->mfc_parent]) { | |
1852 | /* It's an (*,*) entry and the packet is not coming from | |
1853 | * the upstream: forward the packet to the upstream | |
1854 | * only. | |
1855 | */ | |
1856 | psend = cache->mfc_parent; | |
1857 | goto last_forward; | |
1858 | } | |
1859 | goto dont_forward; | |
1860 | } | |
a8cb16dd ED |
1861 | for (ct = cache->mfc_un.res.maxvif - 1; |
1862 | ct >= cache->mfc_un.res.minvif; ct--) { | |
660b26dc | 1863 | /* For (*,G) entry, don't forward to the incoming interface */ |
360eb5da ND |
1864 | if ((cache->mfc_origin != htonl(INADDR_ANY) || |
1865 | ct != true_vifi) && | |
660b26dc | 1866 | ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { |
1da177e4 LT |
1867 | if (psend != -1) { |
1868 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 1869 | |
1da177e4 | 1870 | if (skb2) |
0c12295a PM |
1871 | ipmr_queue_xmit(net, mrt, skb2, cache, |
1872 | psend); | |
1da177e4 | 1873 | } |
c354e124 | 1874 | psend = ct; |
1da177e4 LT |
1875 | } |
1876 | } | |
660b26dc | 1877 | last_forward: |
1da177e4 LT |
1878 | if (psend != -1) { |
1879 | if (local) { | |
1880 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
a8cb16dd | 1881 | |
1da177e4 | 1882 | if (skb2) |
0c12295a | 1883 | ipmr_queue_xmit(net, mrt, skb2, cache, psend); |
1da177e4 | 1884 | } else { |
0c12295a | 1885 | ipmr_queue_xmit(net, mrt, skb, cache, psend); |
c4854ec8 | 1886 | return; |
1da177e4 LT |
1887 | } |
1888 | } | |
1889 | ||
1890 | dont_forward: | |
1891 | if (!local) | |
1892 | kfree_skb(skb); | |
1da177e4 LT |
1893 | } |
1894 | ||
417da66f | 1895 | static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb) |
ee3f1aaf | 1896 | { |
417da66f DM |
1897 | struct rtable *rt = skb_rtable(skb); |
1898 | struct iphdr *iph = ip_hdr(skb); | |
da91981b | 1899 | struct flowi4 fl4 = { |
417da66f DM |
1900 | .daddr = iph->daddr, |
1901 | .saddr = iph->saddr, | |
b0fe4a31 | 1902 | .flowi4_tos = RT_TOS(iph->tos), |
4fd551d7 DM |
1903 | .flowi4_oif = (rt_is_output_route(rt) ? |
1904 | skb->dev->ifindex : 0), | |
1905 | .flowi4_iif = (rt_is_output_route(rt) ? | |
1fb9489b | 1906 | LOOPBACK_IFINDEX : |
4fd551d7 | 1907 | skb->dev->ifindex), |
b4869889 | 1908 | .flowi4_mark = skb->mark, |
ee3f1aaf DM |
1909 | }; |
1910 | struct mr_table *mrt; | |
1911 | int err; | |
1912 | ||
da91981b | 1913 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
ee3f1aaf DM |
1914 | if (err) |
1915 | return ERR_PTR(err); | |
1916 | return mrt; | |
1917 | } | |
1da177e4 | 1918 | |
7ef8f65d NA |
1919 | /* Multicast packets for forwarding arrive here |
1920 | * Called with rcu_read_lock(); | |
1da177e4 | 1921 | */ |
1da177e4 LT |
1922 | int ip_mr_input(struct sk_buff *skb) |
1923 | { | |
1924 | struct mfc_cache *cache; | |
4feb88e5 | 1925 | struct net *net = dev_net(skb->dev); |
511c3f92 | 1926 | int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL; |
f0ad0860 | 1927 | struct mr_table *mrt; |
1da177e4 LT |
1928 | |
1929 | /* Packet is looped back after forward, it should not be | |
a8cb16dd | 1930 | * forwarded second time, but still can be delivered locally. |
1da177e4 | 1931 | */ |
4c968709 | 1932 | if (IPCB(skb)->flags & IPSKB_FORWARDED) |
1da177e4 LT |
1933 | goto dont_forward; |
1934 | ||
417da66f | 1935 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
1936 | if (IS_ERR(mrt)) { |
1937 | kfree_skb(skb); | |
1938 | return PTR_ERR(mrt); | |
e40dbc51 | 1939 | } |
1da177e4 | 1940 | if (!local) { |
4c968709 ED |
1941 | if (IPCB(skb)->opt.router_alert) { |
1942 | if (ip_call_ra_chain(skb)) | |
1943 | return 0; | |
1944 | } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP) { | |
1945 | /* IGMPv1 (and broken IGMPv2 implementations sort of | |
1946 | * Cisco IOS <= 11.2(8)) do not put router alert | |
1947 | * option to IGMP packets destined to routable | |
1948 | * groups. It is very bad, because it means | |
1949 | * that we can forward NO IGMP messages. | |
1950 | */ | |
1951 | struct sock *mroute_sk; | |
1952 | ||
1953 | mroute_sk = rcu_dereference(mrt->mroute_sk); | |
1954 | if (mroute_sk) { | |
1955 | nf_reset(skb); | |
1956 | raw_rcv(mroute_sk, skb); | |
1957 | return 0; | |
1958 | } | |
1da177e4 LT |
1959 | } |
1960 | } | |
1961 | ||
a8c9486b | 1962 | /* already under rcu_read_lock() */ |
0c12295a | 1963 | cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); |
51456b29 | 1964 | if (!cache) { |
660b26dc ND |
1965 | int vif = ipmr_find_vif(mrt, skb->dev); |
1966 | ||
1967 | if (vif >= 0) | |
1968 | cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr, | |
1969 | vif); | |
1970 | } | |
1da177e4 | 1971 | |
7ef8f65d | 1972 | /* No usable cache entry */ |
51456b29 | 1973 | if (!cache) { |
1da177e4 LT |
1974 | int vif; |
1975 | ||
1976 | if (local) { | |
1977 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
1978 | ip_local_deliver(skb); | |
51456b29 | 1979 | if (!skb2) |
1da177e4 | 1980 | return -ENOBUFS; |
1da177e4 LT |
1981 | skb = skb2; |
1982 | } | |
1983 | ||
a8c9486b | 1984 | read_lock(&mrt_lock); |
0c12295a | 1985 | vif = ipmr_find_vif(mrt, skb->dev); |
1da177e4 | 1986 | if (vif >= 0) { |
0eae88f3 | 1987 | int err2 = ipmr_cache_unresolved(mrt, vif, skb); |
1da177e4 LT |
1988 | read_unlock(&mrt_lock); |
1989 | ||
0eae88f3 | 1990 | return err2; |
1da177e4 LT |
1991 | } |
1992 | read_unlock(&mrt_lock); | |
1993 | kfree_skb(skb); | |
1994 | return -ENODEV; | |
1995 | } | |
1996 | ||
a8c9486b | 1997 | read_lock(&mrt_lock); |
0c12295a | 1998 | ip_mr_forward(net, mrt, skb, cache, local); |
1da177e4 LT |
1999 | read_unlock(&mrt_lock); |
2000 | ||
2001 | if (local) | |
2002 | return ip_local_deliver(skb); | |
2003 | ||
2004 | return 0; | |
2005 | ||
2006 | dont_forward: | |
2007 | if (local) | |
2008 | return ip_local_deliver(skb); | |
2009 | kfree_skb(skb); | |
2010 | return 0; | |
2011 | } | |
2012 | ||
b1879204 | 2013 | #ifdef CONFIG_IP_PIMSM_V1 |
7ef8f65d | 2014 | /* Handle IGMP messages of PIMv1 */ |
a8cb16dd | 2015 | int pim_rcv_v1(struct sk_buff *skb) |
b1879204 IJ |
2016 | { |
2017 | struct igmphdr *pim; | |
4feb88e5 | 2018 | struct net *net = dev_net(skb->dev); |
f0ad0860 | 2019 | struct mr_table *mrt; |
b1879204 IJ |
2020 | |
2021 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) | |
2022 | goto drop; | |
2023 | ||
2024 | pim = igmp_hdr(skb); | |
2025 | ||
417da66f | 2026 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2027 | if (IS_ERR(mrt)) |
2028 | goto drop; | |
0c12295a | 2029 | if (!mrt->mroute_do_pim || |
b1879204 IJ |
2030 | pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) |
2031 | goto drop; | |
2032 | ||
f0ad0860 | 2033 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2034 | drop: |
2035 | kfree_skb(skb); | |
2036 | } | |
1da177e4 LT |
2037 | return 0; |
2038 | } | |
2039 | #endif | |
2040 | ||
2041 | #ifdef CONFIG_IP_PIMSM_V2 | |
a8cb16dd | 2042 | static int pim_rcv(struct sk_buff *skb) |
1da177e4 LT |
2043 | { |
2044 | struct pimreghdr *pim; | |
f0ad0860 PM |
2045 | struct net *net = dev_net(skb->dev); |
2046 | struct mr_table *mrt; | |
1da177e4 | 2047 | |
b1879204 | 2048 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) |
1da177e4 LT |
2049 | goto drop; |
2050 | ||
9c70220b | 2051 | pim = (struct pimreghdr *)skb_transport_header(skb); |
a8cb16dd ED |
2052 | if (pim->type != ((PIM_VERSION << 4) | (PIM_REGISTER)) || |
2053 | (pim->flags & PIM_NULL_REGISTER) || | |
e905a9ed | 2054 | (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && |
d3bc23e7 | 2055 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
1da177e4 LT |
2056 | goto drop; |
2057 | ||
417da66f | 2058 | mrt = ipmr_rt_fib_lookup(net, skb); |
ee3f1aaf DM |
2059 | if (IS_ERR(mrt)) |
2060 | goto drop; | |
f0ad0860 | 2061 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
b1879204 IJ |
2062 | drop: |
2063 | kfree_skb(skb); | |
2064 | } | |
1da177e4 LT |
2065 | return 0; |
2066 | } | |
2067 | #endif | |
2068 | ||
cb6a4e46 PM |
2069 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
2070 | struct mfc_cache *c, struct rtmsg *rtm) | |
1da177e4 LT |
2071 | { |
2072 | int ct; | |
2073 | struct rtnexthop *nhp; | |
92a395e5 | 2074 | struct nlattr *mp_attr; |
adfa85e4 | 2075 | struct rta_mfc_stats mfcs; |
1da177e4 | 2076 | |
7438189b | 2077 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
ed0f160a | 2078 | if (c->mfc_parent >= MAXVIFS) |
7438189b ND |
2079 | return -ENOENT; |
2080 | ||
92a395e5 TG |
2081 | if (VIF_EXISTS(mrt, c->mfc_parent) && |
2082 | nla_put_u32(skb, RTA_IIF, mrt->vif_table[c->mfc_parent].dev->ifindex) < 0) | |
2083 | return -EMSGSIZE; | |
1da177e4 | 2084 | |
92a395e5 TG |
2085 | if (!(mp_attr = nla_nest_start(skb, RTA_MULTIPATH))) |
2086 | return -EMSGSIZE; | |
1da177e4 LT |
2087 | |
2088 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { | |
0c12295a | 2089 | if (VIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
92a395e5 TG |
2090 | if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp)))) { |
2091 | nla_nest_cancel(skb, mp_attr); | |
2092 | return -EMSGSIZE; | |
2093 | } | |
2094 | ||
1da177e4 LT |
2095 | nhp->rtnh_flags = 0; |
2096 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; | |
0c12295a | 2097 | nhp->rtnh_ifindex = mrt->vif_table[ct].dev->ifindex; |
1da177e4 LT |
2098 | nhp->rtnh_len = sizeof(*nhp); |
2099 | } | |
2100 | } | |
92a395e5 TG |
2101 | |
2102 | nla_nest_end(skb, mp_attr); | |
2103 | ||
adfa85e4 ND |
2104 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
2105 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; | |
2106 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; | |
2107 | if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0) | |
2108 | return -EMSGSIZE; | |
2109 | ||
1da177e4 LT |
2110 | rtm->rtm_type = RTN_MULTICAST; |
2111 | return 1; | |
1da177e4 LT |
2112 | } |
2113 | ||
9a1b9496 DM |
2114 | int ipmr_get_route(struct net *net, struct sk_buff *skb, |
2115 | __be32 saddr, __be32 daddr, | |
2116 | struct rtmsg *rtm, int nowait) | |
1da177e4 | 2117 | { |
1da177e4 | 2118 | struct mfc_cache *cache; |
9a1b9496 DM |
2119 | struct mr_table *mrt; |
2120 | int err; | |
1da177e4 | 2121 | |
f0ad0860 | 2122 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 2123 | if (!mrt) |
f0ad0860 PM |
2124 | return -ENOENT; |
2125 | ||
a8c9486b | 2126 | rcu_read_lock(); |
9a1b9496 | 2127 | cache = ipmr_cache_find(mrt, saddr, daddr); |
51456b29 | 2128 | if (!cache && skb->dev) { |
660b26dc | 2129 | int vif = ipmr_find_vif(mrt, skb->dev); |
1da177e4 | 2130 | |
660b26dc ND |
2131 | if (vif >= 0) |
2132 | cache = ipmr_cache_find_any(mrt, daddr, vif); | |
2133 | } | |
51456b29 | 2134 | if (!cache) { |
72287490 | 2135 | struct sk_buff *skb2; |
eddc9ec5 | 2136 | struct iphdr *iph; |
1da177e4 | 2137 | struct net_device *dev; |
a8cb16dd | 2138 | int vif = -1; |
1da177e4 LT |
2139 | |
2140 | if (nowait) { | |
a8c9486b | 2141 | rcu_read_unlock(); |
1da177e4 LT |
2142 | return -EAGAIN; |
2143 | } | |
2144 | ||
2145 | dev = skb->dev; | |
a8c9486b | 2146 | read_lock(&mrt_lock); |
a8cb16dd ED |
2147 | if (dev) |
2148 | vif = ipmr_find_vif(mrt, dev); | |
2149 | if (vif < 0) { | |
1da177e4 | 2150 | read_unlock(&mrt_lock); |
a8c9486b | 2151 | rcu_read_unlock(); |
1da177e4 LT |
2152 | return -ENODEV; |
2153 | } | |
72287490 AK |
2154 | skb2 = skb_clone(skb, GFP_ATOMIC); |
2155 | if (!skb2) { | |
2156 | read_unlock(&mrt_lock); | |
a8c9486b | 2157 | rcu_read_unlock(); |
72287490 AK |
2158 | return -ENOMEM; |
2159 | } | |
2160 | ||
e2d1bca7 ACM |
2161 | skb_push(skb2, sizeof(struct iphdr)); |
2162 | skb_reset_network_header(skb2); | |
eddc9ec5 ACM |
2163 | iph = ip_hdr(skb2); |
2164 | iph->ihl = sizeof(struct iphdr) >> 2; | |
9a1b9496 DM |
2165 | iph->saddr = saddr; |
2166 | iph->daddr = daddr; | |
eddc9ec5 | 2167 | iph->version = 0; |
0c12295a | 2168 | err = ipmr_cache_unresolved(mrt, vif, skb2); |
1da177e4 | 2169 | read_unlock(&mrt_lock); |
a8c9486b | 2170 | rcu_read_unlock(); |
1da177e4 LT |
2171 | return err; |
2172 | } | |
2173 | ||
a8c9486b | 2174 | read_lock(&mrt_lock); |
cb6a4e46 | 2175 | err = __ipmr_fill_mroute(mrt, skb, cache, rtm); |
1da177e4 | 2176 | read_unlock(&mrt_lock); |
a8c9486b | 2177 | rcu_read_unlock(); |
1da177e4 LT |
2178 | return err; |
2179 | } | |
2180 | ||
cb6a4e46 | 2181 | static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
65886f43 ND |
2182 | u32 portid, u32 seq, struct mfc_cache *c, int cmd, |
2183 | int flags) | |
cb6a4e46 PM |
2184 | { |
2185 | struct nlmsghdr *nlh; | |
2186 | struct rtmsg *rtm; | |
1eb99af5 | 2187 | int err; |
cb6a4e46 | 2188 | |
65886f43 | 2189 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
51456b29 | 2190 | if (!nlh) |
cb6a4e46 PM |
2191 | return -EMSGSIZE; |
2192 | ||
2193 | rtm = nlmsg_data(nlh); | |
2194 | rtm->rtm_family = RTNL_FAMILY_IPMR; | |
2195 | rtm->rtm_dst_len = 32; | |
2196 | rtm->rtm_src_len = 32; | |
2197 | rtm->rtm_tos = 0; | |
2198 | rtm->rtm_table = mrt->id; | |
f3756b79 DM |
2199 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
2200 | goto nla_put_failure; | |
cb6a4e46 PM |
2201 | rtm->rtm_type = RTN_MULTICAST; |
2202 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; | |
9a68ac72 ND |
2203 | if (c->mfc_flags & MFC_STATIC) |
2204 | rtm->rtm_protocol = RTPROT_STATIC; | |
2205 | else | |
2206 | rtm->rtm_protocol = RTPROT_MROUTED; | |
cb6a4e46 PM |
2207 | rtm->rtm_flags = 0; |
2208 | ||
930345ea JB |
2209 | if (nla_put_in_addr(skb, RTA_SRC, c->mfc_origin) || |
2210 | nla_put_in_addr(skb, RTA_DST, c->mfc_mcastgrp)) | |
f3756b79 | 2211 | goto nla_put_failure; |
1eb99af5 ND |
2212 | err = __ipmr_fill_mroute(mrt, skb, c, rtm); |
2213 | /* do not break the dump if cache is unresolved */ | |
2214 | if (err < 0 && err != -ENOENT) | |
cb6a4e46 PM |
2215 | goto nla_put_failure; |
2216 | ||
053c095a JB |
2217 | nlmsg_end(skb, nlh); |
2218 | return 0; | |
cb6a4e46 PM |
2219 | |
2220 | nla_put_failure: | |
2221 | nlmsg_cancel(skb, nlh); | |
2222 | return -EMSGSIZE; | |
2223 | } | |
2224 | ||
8cd3ac9f ND |
2225 | static size_t mroute_msgsize(bool unresolved, int maxvif) |
2226 | { | |
2227 | size_t len = | |
2228 | NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2229 | + nla_total_size(4) /* RTA_TABLE */ | |
2230 | + nla_total_size(4) /* RTA_SRC */ | |
2231 | + nla_total_size(4) /* RTA_DST */ | |
2232 | ; | |
2233 | ||
2234 | if (!unresolved) | |
2235 | len = len | |
2236 | + nla_total_size(4) /* RTA_IIF */ | |
2237 | + nla_total_size(0) /* RTA_MULTIPATH */ | |
2238 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) | |
2239 | /* RTA_MFC_STATS */ | |
2240 | + nla_total_size(sizeof(struct rta_mfc_stats)) | |
2241 | ; | |
2242 | ||
2243 | return len; | |
2244 | } | |
2245 | ||
2246 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, | |
2247 | int cmd) | |
2248 | { | |
2249 | struct net *net = read_pnet(&mrt->net); | |
2250 | struct sk_buff *skb; | |
2251 | int err = -ENOBUFS; | |
2252 | ||
2253 | skb = nlmsg_new(mroute_msgsize(mfc->mfc_parent >= MAXVIFS, mrt->maxvif), | |
2254 | GFP_ATOMIC); | |
51456b29 | 2255 | if (!skb) |
8cd3ac9f ND |
2256 | goto errout; |
2257 | ||
65886f43 | 2258 | err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
8cd3ac9f ND |
2259 | if (err < 0) |
2260 | goto errout; | |
2261 | ||
2262 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE, NULL, GFP_ATOMIC); | |
2263 | return; | |
2264 | ||
2265 | errout: | |
2266 | kfree_skb(skb); | |
2267 | if (err < 0) | |
2268 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE, err); | |
2269 | } | |
2270 | ||
cb6a4e46 PM |
2271 | static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
2272 | { | |
2273 | struct net *net = sock_net(skb->sk); | |
2274 | struct mr_table *mrt; | |
2275 | struct mfc_cache *mfc; | |
2276 | unsigned int t = 0, s_t; | |
2277 | unsigned int h = 0, s_h; | |
2278 | unsigned int e = 0, s_e; | |
2279 | ||
2280 | s_t = cb->args[0]; | |
2281 | s_h = cb->args[1]; | |
2282 | s_e = cb->args[2]; | |
2283 | ||
a8c9486b | 2284 | rcu_read_lock(); |
cb6a4e46 PM |
2285 | ipmr_for_each_table(mrt, net) { |
2286 | if (t < s_t) | |
2287 | goto next_table; | |
2288 | if (t > s_t) | |
2289 | s_h = 0; | |
2290 | for (h = s_h; h < MFC_LINES; h++) { | |
a8c9486b | 2291 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_array[h], list) { |
cb6a4e46 PM |
2292 | if (e < s_e) |
2293 | goto next_entry; | |
2294 | if (ipmr_fill_mroute(mrt, skb, | |
15e47304 | 2295 | NETLINK_CB(cb->skb).portid, |
cb6a4e46 | 2296 | cb->nlh->nlmsg_seq, |
65886f43 ND |
2297 | mfc, RTM_NEWROUTE, |
2298 | NLM_F_MULTI) < 0) | |
cb6a4e46 PM |
2299 | goto done; |
2300 | next_entry: | |
2301 | e++; | |
2302 | } | |
2303 | e = s_e = 0; | |
2304 | } | |
1eb99af5 ND |
2305 | spin_lock_bh(&mfc_unres_lock); |
2306 | list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) { | |
2307 | if (e < s_e) | |
2308 | goto next_entry2; | |
2309 | if (ipmr_fill_mroute(mrt, skb, | |
2310 | NETLINK_CB(cb->skb).portid, | |
2311 | cb->nlh->nlmsg_seq, | |
65886f43 ND |
2312 | mfc, RTM_NEWROUTE, |
2313 | NLM_F_MULTI) < 0) { | |
1eb99af5 ND |
2314 | spin_unlock_bh(&mfc_unres_lock); |
2315 | goto done; | |
2316 | } | |
2317 | next_entry2: | |
2318 | e++; | |
2319 | } | |
2320 | spin_unlock_bh(&mfc_unres_lock); | |
2321 | e = s_e = 0; | |
cb6a4e46 PM |
2322 | s_h = 0; |
2323 | next_table: | |
2324 | t++; | |
2325 | } | |
2326 | done: | |
a8c9486b | 2327 | rcu_read_unlock(); |
cb6a4e46 PM |
2328 | |
2329 | cb->args[2] = e; | |
2330 | cb->args[1] = h; | |
2331 | cb->args[0] = t; | |
2332 | ||
2333 | return skb->len; | |
2334 | } | |
2335 | ||
ccbb0aa6 NA |
2336 | static const struct nla_policy rtm_ipmr_policy[RTA_MAX + 1] = { |
2337 | [RTA_SRC] = { .type = NLA_U32 }, | |
2338 | [RTA_DST] = { .type = NLA_U32 }, | |
2339 | [RTA_IIF] = { .type = NLA_U32 }, | |
2340 | [RTA_TABLE] = { .type = NLA_U32 }, | |
2341 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, | |
2342 | }; | |
2343 | ||
2344 | static bool ipmr_rtm_validate_proto(unsigned char rtm_protocol) | |
2345 | { | |
2346 | switch (rtm_protocol) { | |
2347 | case RTPROT_STATIC: | |
2348 | case RTPROT_MROUTED: | |
2349 | return true; | |
2350 | } | |
2351 | return false; | |
2352 | } | |
2353 | ||
2354 | static int ipmr_nla_get_ttls(const struct nlattr *nla, struct mfcctl *mfcc) | |
2355 | { | |
2356 | struct rtnexthop *rtnh = nla_data(nla); | |
2357 | int remaining = nla_len(nla), vifi = 0; | |
2358 | ||
2359 | while (rtnh_ok(rtnh, remaining)) { | |
2360 | mfcc->mfcc_ttls[vifi] = rtnh->rtnh_hops; | |
2361 | if (++vifi == MAXVIFS) | |
2362 | break; | |
2363 | rtnh = rtnh_next(rtnh, &remaining); | |
2364 | } | |
2365 | ||
2366 | return remaining > 0 ? -EINVAL : vifi; | |
2367 | } | |
2368 | ||
2369 | /* returns < 0 on error, 0 for ADD_MFC and 1 for ADD_MFC_PROXY */ | |
2370 | static int rtm_to_ipmr_mfcc(struct net *net, struct nlmsghdr *nlh, | |
2371 | struct mfcctl *mfcc, int *mrtsock, | |
2372 | struct mr_table **mrtret) | |
2373 | { | |
2374 | struct net_device *dev = NULL; | |
2375 | u32 tblid = RT_TABLE_DEFAULT; | |
2376 | struct mr_table *mrt; | |
2377 | struct nlattr *attr; | |
2378 | struct rtmsg *rtm; | |
2379 | int ret, rem; | |
2380 | ||
2381 | ret = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipmr_policy); | |
2382 | if (ret < 0) | |
2383 | goto out; | |
2384 | rtm = nlmsg_data(nlh); | |
2385 | ||
2386 | ret = -EINVAL; | |
2387 | if (rtm->rtm_family != RTNL_FAMILY_IPMR || rtm->rtm_dst_len != 32 || | |
2388 | rtm->rtm_type != RTN_MULTICAST || | |
2389 | rtm->rtm_scope != RT_SCOPE_UNIVERSE || | |
2390 | !ipmr_rtm_validate_proto(rtm->rtm_protocol)) | |
2391 | goto out; | |
2392 | ||
2393 | memset(mfcc, 0, sizeof(*mfcc)); | |
2394 | mfcc->mfcc_parent = -1; | |
2395 | ret = 0; | |
2396 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), rem) { | |
2397 | switch (nla_type(attr)) { | |
2398 | case RTA_SRC: | |
2399 | mfcc->mfcc_origin.s_addr = nla_get_be32(attr); | |
2400 | break; | |
2401 | case RTA_DST: | |
2402 | mfcc->mfcc_mcastgrp.s_addr = nla_get_be32(attr); | |
2403 | break; | |
2404 | case RTA_IIF: | |
2405 | dev = __dev_get_by_index(net, nla_get_u32(attr)); | |
2406 | if (!dev) { | |
2407 | ret = -ENODEV; | |
2408 | goto out; | |
2409 | } | |
2410 | break; | |
2411 | case RTA_MULTIPATH: | |
2412 | if (ipmr_nla_get_ttls(attr, mfcc) < 0) { | |
2413 | ret = -EINVAL; | |
2414 | goto out; | |
2415 | } | |
2416 | break; | |
2417 | case RTA_PREFSRC: | |
2418 | ret = 1; | |
2419 | break; | |
2420 | case RTA_TABLE: | |
2421 | tblid = nla_get_u32(attr); | |
2422 | break; | |
2423 | } | |
2424 | } | |
2425 | mrt = ipmr_get_table(net, tblid); | |
2426 | if (!mrt) { | |
2427 | ret = -ENOENT; | |
2428 | goto out; | |
2429 | } | |
2430 | *mrtret = mrt; | |
2431 | *mrtsock = rtm->rtm_protocol == RTPROT_MROUTED ? 1 : 0; | |
2432 | if (dev) | |
2433 | mfcc->mfcc_parent = ipmr_find_vif(mrt, dev); | |
2434 | ||
2435 | out: | |
2436 | return ret; | |
2437 | } | |
2438 | ||
2439 | /* takes care of both newroute and delroute */ | |
2440 | static int ipmr_rtm_route(struct sk_buff *skb, struct nlmsghdr *nlh) | |
2441 | { | |
2442 | struct net *net = sock_net(skb->sk); | |
2443 | int ret, mrtsock, parent; | |
2444 | struct mr_table *tbl; | |
2445 | struct mfcctl mfcc; | |
2446 | ||
2447 | mrtsock = 0; | |
2448 | tbl = NULL; | |
2449 | ret = rtm_to_ipmr_mfcc(net, nlh, &mfcc, &mrtsock, &tbl); | |
2450 | if (ret < 0) | |
2451 | return ret; | |
2452 | ||
2453 | parent = ret ? mfcc.mfcc_parent : -1; | |
2454 | if (nlh->nlmsg_type == RTM_NEWROUTE) | |
2455 | return ipmr_mfc_add(net, tbl, &mfcc, mrtsock, parent); | |
2456 | else | |
2457 | return ipmr_mfc_delete(tbl, &mfcc, parent); | |
2458 | } | |
2459 | ||
e905a9ed | 2460 | #ifdef CONFIG_PROC_FS |
7ef8f65d NA |
2461 | /* The /proc interfaces to multicast routing : |
2462 | * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif | |
1da177e4 LT |
2463 | */ |
2464 | struct ipmr_vif_iter { | |
f6bb4514 | 2465 | struct seq_net_private p; |
f0ad0860 | 2466 | struct mr_table *mrt; |
1da177e4 LT |
2467 | int ct; |
2468 | }; | |
2469 | ||
f6bb4514 BT |
2470 | static struct vif_device *ipmr_vif_seq_idx(struct net *net, |
2471 | struct ipmr_vif_iter *iter, | |
1da177e4 LT |
2472 | loff_t pos) |
2473 | { | |
f0ad0860 | 2474 | struct mr_table *mrt = iter->mrt; |
0c12295a PM |
2475 | |
2476 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { | |
2477 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 2478 | continue; |
e905a9ed | 2479 | if (pos-- == 0) |
0c12295a | 2480 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
2481 | } |
2482 | return NULL; | |
2483 | } | |
2484 | ||
2485 | static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) | |
ba93ef74 | 2486 | __acquires(mrt_lock) |
1da177e4 | 2487 | { |
f0ad0860 | 2488 | struct ipmr_vif_iter *iter = seq->private; |
f6bb4514 | 2489 | struct net *net = seq_file_net(seq); |
f0ad0860 PM |
2490 | struct mr_table *mrt; |
2491 | ||
2492 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); | |
51456b29 | 2493 | if (!mrt) |
f0ad0860 PM |
2494 | return ERR_PTR(-ENOENT); |
2495 | ||
2496 | iter->mrt = mrt; | |
f6bb4514 | 2497 | |
1da177e4 | 2498 | read_lock(&mrt_lock); |
f6bb4514 | 2499 | return *pos ? ipmr_vif_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
2500 | : SEQ_START_TOKEN; |
2501 | } | |
2502 | ||
2503 | static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2504 | { | |
2505 | struct ipmr_vif_iter *iter = seq->private; | |
f6bb4514 | 2506 | struct net *net = seq_file_net(seq); |
f0ad0860 | 2507 | struct mr_table *mrt = iter->mrt; |
1da177e4 LT |
2508 | |
2509 | ++*pos; | |
2510 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 2511 | return ipmr_vif_seq_idx(net, iter, 0); |
e905a9ed | 2512 | |
0c12295a PM |
2513 | while (++iter->ct < mrt->maxvif) { |
2514 | if (!VIF_EXISTS(mrt, iter->ct)) | |
1da177e4 | 2515 | continue; |
0c12295a | 2516 | return &mrt->vif_table[iter->ct]; |
1da177e4 LT |
2517 | } |
2518 | return NULL; | |
2519 | } | |
2520 | ||
2521 | static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) | |
ba93ef74 | 2522 | __releases(mrt_lock) |
1da177e4 LT |
2523 | { |
2524 | read_unlock(&mrt_lock); | |
2525 | } | |
2526 | ||
2527 | static int ipmr_vif_seq_show(struct seq_file *seq, void *v) | |
2528 | { | |
f0ad0860 PM |
2529 | struct ipmr_vif_iter *iter = seq->private; |
2530 | struct mr_table *mrt = iter->mrt; | |
f6bb4514 | 2531 | |
1da177e4 | 2532 | if (v == SEQ_START_TOKEN) { |
e905a9ed | 2533 | seq_puts(seq, |
1da177e4 LT |
2534 | "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); |
2535 | } else { | |
2536 | const struct vif_device *vif = v; | |
2537 | const char *name = vif->dev ? vif->dev->name : "none"; | |
2538 | ||
2539 | seq_printf(seq, | |
2540 | "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", | |
0c12295a | 2541 | vif - mrt->vif_table, |
e905a9ed | 2542 | name, vif->bytes_in, vif->pkt_in, |
1da177e4 LT |
2543 | vif->bytes_out, vif->pkt_out, |
2544 | vif->flags, vif->local, vif->remote); | |
2545 | } | |
2546 | return 0; | |
2547 | } | |
2548 | ||
f690808e | 2549 | static const struct seq_operations ipmr_vif_seq_ops = { |
1da177e4 LT |
2550 | .start = ipmr_vif_seq_start, |
2551 | .next = ipmr_vif_seq_next, | |
2552 | .stop = ipmr_vif_seq_stop, | |
2553 | .show = ipmr_vif_seq_show, | |
2554 | }; | |
2555 | ||
2556 | static int ipmr_vif_open(struct inode *inode, struct file *file) | |
2557 | { | |
f6bb4514 BT |
2558 | return seq_open_net(inode, file, &ipmr_vif_seq_ops, |
2559 | sizeof(struct ipmr_vif_iter)); | |
1da177e4 LT |
2560 | } |
2561 | ||
9a32144e | 2562 | static const struct file_operations ipmr_vif_fops = { |
1da177e4 LT |
2563 | .owner = THIS_MODULE, |
2564 | .open = ipmr_vif_open, | |
2565 | .read = seq_read, | |
2566 | .llseek = seq_lseek, | |
f6bb4514 | 2567 | .release = seq_release_net, |
1da177e4 LT |
2568 | }; |
2569 | ||
2570 | struct ipmr_mfc_iter { | |
f6bb4514 | 2571 | struct seq_net_private p; |
f0ad0860 | 2572 | struct mr_table *mrt; |
862465f2 | 2573 | struct list_head *cache; |
1da177e4 LT |
2574 | int ct; |
2575 | }; | |
2576 | ||
2577 | ||
f6bb4514 BT |
2578 | static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net, |
2579 | struct ipmr_mfc_iter *it, loff_t pos) | |
1da177e4 | 2580 | { |
f0ad0860 | 2581 | struct mr_table *mrt = it->mrt; |
1da177e4 LT |
2582 | struct mfc_cache *mfc; |
2583 | ||
a8c9486b | 2584 | rcu_read_lock(); |
862465f2 | 2585 | for (it->ct = 0; it->ct < MFC_LINES; it->ct++) { |
0c12295a | 2586 | it->cache = &mrt->mfc_cache_array[it->ct]; |
a8c9486b | 2587 | list_for_each_entry_rcu(mfc, it->cache, list) |
e905a9ed | 2588 | if (pos-- == 0) |
1da177e4 | 2589 | return mfc; |
862465f2 | 2590 | } |
a8c9486b | 2591 | rcu_read_unlock(); |
1da177e4 | 2592 | |
1da177e4 | 2593 | spin_lock_bh(&mfc_unres_lock); |
0c12295a | 2594 | it->cache = &mrt->mfc_unres_queue; |
862465f2 | 2595 | list_for_each_entry(mfc, it->cache, list) |
e258beb2 | 2596 | if (pos-- == 0) |
1da177e4 LT |
2597 | return mfc; |
2598 | spin_unlock_bh(&mfc_unres_lock); | |
2599 | ||
2600 | it->cache = NULL; | |
2601 | return NULL; | |
2602 | } | |
2603 | ||
2604 | ||
2605 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) | |
2606 | { | |
2607 | struct ipmr_mfc_iter *it = seq->private; | |
f6bb4514 | 2608 | struct net *net = seq_file_net(seq); |
f0ad0860 | 2609 | struct mr_table *mrt; |
f6bb4514 | 2610 | |
f0ad0860 | 2611 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
51456b29 | 2612 | if (!mrt) |
f0ad0860 | 2613 | return ERR_PTR(-ENOENT); |
f6bb4514 | 2614 | |
f0ad0860 | 2615 | it->mrt = mrt; |
1da177e4 LT |
2616 | it->cache = NULL; |
2617 | it->ct = 0; | |
f6bb4514 | 2618 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
1da177e4 LT |
2619 | : SEQ_START_TOKEN; |
2620 | } | |
2621 | ||
2622 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2623 | { | |
2624 | struct mfc_cache *mfc = v; | |
2625 | struct ipmr_mfc_iter *it = seq->private; | |
f6bb4514 | 2626 | struct net *net = seq_file_net(seq); |
f0ad0860 | 2627 | struct mr_table *mrt = it->mrt; |
1da177e4 LT |
2628 | |
2629 | ++*pos; | |
2630 | ||
2631 | if (v == SEQ_START_TOKEN) | |
f6bb4514 | 2632 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
1da177e4 | 2633 | |
862465f2 PM |
2634 | if (mfc->list.next != it->cache) |
2635 | return list_entry(mfc->list.next, struct mfc_cache, list); | |
e905a9ed | 2636 | |
0c12295a | 2637 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 LT |
2638 | goto end_of_list; |
2639 | ||
0c12295a | 2640 | BUG_ON(it->cache != &mrt->mfc_cache_array[it->ct]); |
1da177e4 LT |
2641 | |
2642 | while (++it->ct < MFC_LINES) { | |
0c12295a | 2643 | it->cache = &mrt->mfc_cache_array[it->ct]; |
862465f2 PM |
2644 | if (list_empty(it->cache)) |
2645 | continue; | |
2646 | return list_first_entry(it->cache, struct mfc_cache, list); | |
1da177e4 LT |
2647 | } |
2648 | ||
2649 | /* exhausted cache_array, show unresolved */ | |
a8c9486b | 2650 | rcu_read_unlock(); |
0c12295a | 2651 | it->cache = &mrt->mfc_unres_queue; |
1da177e4 | 2652 | it->ct = 0; |
e905a9ed | 2653 | |
1da177e4 | 2654 | spin_lock_bh(&mfc_unres_lock); |
862465f2 PM |
2655 | if (!list_empty(it->cache)) |
2656 | return list_first_entry(it->cache, struct mfc_cache, list); | |
1da177e4 | 2657 | |
a8cb16dd | 2658 | end_of_list: |
1da177e4 LT |
2659 | spin_unlock_bh(&mfc_unres_lock); |
2660 | it->cache = NULL; | |
2661 | ||
2662 | return NULL; | |
2663 | } | |
2664 | ||
2665 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) | |
2666 | { | |
2667 | struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 2668 | struct mr_table *mrt = it->mrt; |
1da177e4 | 2669 | |
0c12295a | 2670 | if (it->cache == &mrt->mfc_unres_queue) |
1da177e4 | 2671 | spin_unlock_bh(&mfc_unres_lock); |
0c12295a | 2672 | else if (it->cache == &mrt->mfc_cache_array[it->ct]) |
a8c9486b | 2673 | rcu_read_unlock(); |
1da177e4 LT |
2674 | } |
2675 | ||
2676 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) | |
2677 | { | |
2678 | int n; | |
2679 | ||
2680 | if (v == SEQ_START_TOKEN) { | |
e905a9ed | 2681 | seq_puts(seq, |
1da177e4 LT |
2682 | "Group Origin Iif Pkts Bytes Wrong Oifs\n"); |
2683 | } else { | |
2684 | const struct mfc_cache *mfc = v; | |
2685 | const struct ipmr_mfc_iter *it = seq->private; | |
f0ad0860 | 2686 | const struct mr_table *mrt = it->mrt; |
e905a9ed | 2687 | |
0eae88f3 ED |
2688 | seq_printf(seq, "%08X %08X %-3hd", |
2689 | (__force u32) mfc->mfc_mcastgrp, | |
2690 | (__force u32) mfc->mfc_origin, | |
1ea472e2 | 2691 | mfc->mfc_parent); |
1da177e4 | 2692 | |
0c12295a | 2693 | if (it->cache != &mrt->mfc_unres_queue) { |
1ea472e2 BT |
2694 | seq_printf(seq, " %8lu %8lu %8lu", |
2695 | mfc->mfc_un.res.pkt, | |
2696 | mfc->mfc_un.res.bytes, | |
2697 | mfc->mfc_un.res.wrong_if); | |
132adf54 | 2698 | for (n = mfc->mfc_un.res.minvif; |
a8cb16dd | 2699 | n < mfc->mfc_un.res.maxvif; n++) { |
0c12295a | 2700 | if (VIF_EXISTS(mrt, n) && |
cf958ae3 BT |
2701 | mfc->mfc_un.res.ttls[n] < 255) |
2702 | seq_printf(seq, | |
e905a9ed | 2703 | " %2d:%-3d", |
1da177e4 LT |
2704 | n, mfc->mfc_un.res.ttls[n]); |
2705 | } | |
1ea472e2 BT |
2706 | } else { |
2707 | /* unresolved mfc_caches don't contain | |
2708 | * pkt, bytes and wrong_if values | |
2709 | */ | |
2710 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); | |
1da177e4 LT |
2711 | } |
2712 | seq_putc(seq, '\n'); | |
2713 | } | |
2714 | return 0; | |
2715 | } | |
2716 | ||
f690808e | 2717 | static const struct seq_operations ipmr_mfc_seq_ops = { |
1da177e4 LT |
2718 | .start = ipmr_mfc_seq_start, |
2719 | .next = ipmr_mfc_seq_next, | |
2720 | .stop = ipmr_mfc_seq_stop, | |
2721 | .show = ipmr_mfc_seq_show, | |
2722 | }; | |
2723 | ||
2724 | static int ipmr_mfc_open(struct inode *inode, struct file *file) | |
2725 | { | |
f6bb4514 BT |
2726 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
2727 | sizeof(struct ipmr_mfc_iter)); | |
1da177e4 LT |
2728 | } |
2729 | ||
9a32144e | 2730 | static const struct file_operations ipmr_mfc_fops = { |
1da177e4 LT |
2731 | .owner = THIS_MODULE, |
2732 | .open = ipmr_mfc_open, | |
2733 | .read = seq_read, | |
2734 | .llseek = seq_lseek, | |
f6bb4514 | 2735 | .release = seq_release_net, |
1da177e4 | 2736 | }; |
e905a9ed | 2737 | #endif |
1da177e4 LT |
2738 | |
2739 | #ifdef CONFIG_IP_PIMSM_V2 | |
32613090 | 2740 | static const struct net_protocol pim_protocol = { |
1da177e4 | 2741 | .handler = pim_rcv, |
403dbb97 | 2742 | .netns_ok = 1, |
1da177e4 LT |
2743 | }; |
2744 | #endif | |
2745 | ||
7ef8f65d | 2746 | /* Setup for IP multicast routing */ |
cf958ae3 BT |
2747 | static int __net_init ipmr_net_init(struct net *net) |
2748 | { | |
f0ad0860 | 2749 | int err; |
cf958ae3 | 2750 | |
f0ad0860 PM |
2751 | err = ipmr_rules_init(net); |
2752 | if (err < 0) | |
cf958ae3 | 2753 | goto fail; |
f6bb4514 BT |
2754 | |
2755 | #ifdef CONFIG_PROC_FS | |
2756 | err = -ENOMEM; | |
d4beaa66 | 2757 | if (!proc_create("ip_mr_vif", 0, net->proc_net, &ipmr_vif_fops)) |
f6bb4514 | 2758 | goto proc_vif_fail; |
d4beaa66 | 2759 | if (!proc_create("ip_mr_cache", 0, net->proc_net, &ipmr_mfc_fops)) |
f6bb4514 BT |
2760 | goto proc_cache_fail; |
2761 | #endif | |
2bb8b26c BT |
2762 | return 0; |
2763 | ||
f6bb4514 BT |
2764 | #ifdef CONFIG_PROC_FS |
2765 | proc_cache_fail: | |
ece31ffd | 2766 | remove_proc_entry("ip_mr_vif", net->proc_net); |
f6bb4514 | 2767 | proc_vif_fail: |
f0ad0860 | 2768 | ipmr_rules_exit(net); |
f6bb4514 | 2769 | #endif |
cf958ae3 BT |
2770 | fail: |
2771 | return err; | |
2772 | } | |
2773 | ||
2774 | static void __net_exit ipmr_net_exit(struct net *net) | |
2775 | { | |
f6bb4514 | 2776 | #ifdef CONFIG_PROC_FS |
ece31ffd G |
2777 | remove_proc_entry("ip_mr_cache", net->proc_net); |
2778 | remove_proc_entry("ip_mr_vif", net->proc_net); | |
f6bb4514 | 2779 | #endif |
f0ad0860 | 2780 | ipmr_rules_exit(net); |
cf958ae3 BT |
2781 | } |
2782 | ||
2783 | static struct pernet_operations ipmr_net_ops = { | |
2784 | .init = ipmr_net_init, | |
2785 | .exit = ipmr_net_exit, | |
2786 | }; | |
e905a9ed | 2787 | |
03d2f897 | 2788 | int __init ip_mr_init(void) |
1da177e4 | 2789 | { |
03d2f897 WC |
2790 | int err; |
2791 | ||
1da177e4 LT |
2792 | mrt_cachep = kmem_cache_create("ip_mrt_cache", |
2793 | sizeof(struct mfc_cache), | |
a8c9486b | 2794 | 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, |
20c2df83 | 2795 | NULL); |
03d2f897 | 2796 | |
cf958ae3 BT |
2797 | err = register_pernet_subsys(&ipmr_net_ops); |
2798 | if (err) | |
2799 | goto reg_pernet_fail; | |
2800 | ||
03d2f897 WC |
2801 | err = register_netdevice_notifier(&ip_mr_notifier); |
2802 | if (err) | |
2803 | goto reg_notif_fail; | |
403dbb97 TG |
2804 | #ifdef CONFIG_IP_PIMSM_V2 |
2805 | if (inet_add_protocol(&pim_protocol, IPPROTO_PIM) < 0) { | |
058bd4d2 | 2806 | pr_err("%s: can't add PIM protocol\n", __func__); |
403dbb97 TG |
2807 | err = -EAGAIN; |
2808 | goto add_proto_fail; | |
2809 | } | |
2810 | #endif | |
c7ac8679 GR |
2811 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETROUTE, |
2812 | NULL, ipmr_rtm_dumproute, NULL); | |
ccbb0aa6 NA |
2813 | rtnl_register(RTNL_FAMILY_IPMR, RTM_NEWROUTE, |
2814 | ipmr_rtm_route, NULL, NULL); | |
2815 | rtnl_register(RTNL_FAMILY_IPMR, RTM_DELROUTE, | |
2816 | ipmr_rtm_route, NULL, NULL); | |
03d2f897 | 2817 | return 0; |
f6bb4514 | 2818 | |
403dbb97 TG |
2819 | #ifdef CONFIG_IP_PIMSM_V2 |
2820 | add_proto_fail: | |
2821 | unregister_netdevice_notifier(&ip_mr_notifier); | |
2822 | #endif | |
c3e38896 | 2823 | reg_notif_fail: |
cf958ae3 BT |
2824 | unregister_pernet_subsys(&ipmr_net_ops); |
2825 | reg_pernet_fail: | |
c3e38896 | 2826 | kmem_cache_destroy(mrt_cachep); |
03d2f897 | 2827 | return err; |
1da177e4 | 2828 | } |