blob: 8c5474e16683aa22971b1bed0390354b728a0f64 [file] [log] [blame]
Thomas Graf14c0b972006-08-04 03:38:38 -07001/*
2 * net/core/fib_rules.c Generic Routing Rules
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation, version 2.
7 *
8 * Authors: Thomas Graf <tgraf@suug.ch>
9 */
10
Thomas Graf14c0b972006-08-04 03:38:38 -070011#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/list.h>
14#include <net/fib_rules.h>
15
16static LIST_HEAD(rules_ops);
17static DEFINE_SPINLOCK(rules_mod_lock);
18
19static void notify_rule_change(int event, struct fib_rule *rule,
Thomas Grafc17084d2006-08-15 00:32:48 -070020 struct fib_rules_ops *ops, struct nlmsghdr *nlh,
21 u32 pid);
Thomas Graf14c0b972006-08-04 03:38:38 -070022
23static struct fib_rules_ops *lookup_rules_ops(int family)
24{
25 struct fib_rules_ops *ops;
26
27 rcu_read_lock();
28 list_for_each_entry_rcu(ops, &rules_ops, list) {
29 if (ops->family == family) {
30 if (!try_module_get(ops->owner))
31 ops = NULL;
32 rcu_read_unlock();
33 return ops;
34 }
35 }
36 rcu_read_unlock();
37
38 return NULL;
39}
40
41static void rules_ops_put(struct fib_rules_ops *ops)
42{
43 if (ops)
44 module_put(ops->owner);
45}
46
Thomas Graf73417f62007-03-27 13:56:52 -070047static void flush_route_cache(struct fib_rules_ops *ops)
48{
49 if (ops->flush_cache)
50 ops->flush_cache();
51}
52
Thomas Graf14c0b972006-08-04 03:38:38 -070053int fib_rules_register(struct fib_rules_ops *ops)
54{
55 int err = -EEXIST;
56 struct fib_rules_ops *o;
57
58 if (ops->rule_size < sizeof(struct fib_rule))
59 return -EINVAL;
60
61 if (ops->match == NULL || ops->configure == NULL ||
62 ops->compare == NULL || ops->fill == NULL ||
63 ops->action == NULL)
64 return -EINVAL;
65
66 spin_lock(&rules_mod_lock);
67 list_for_each_entry(o, &rules_ops, list)
68 if (ops->family == o->family)
69 goto errout;
70
71 list_add_tail_rcu(&ops->list, &rules_ops);
72 err = 0;
73errout:
74 spin_unlock(&rules_mod_lock);
75
76 return err;
77}
78
79EXPORT_SYMBOL_GPL(fib_rules_register);
80
81static void cleanup_ops(struct fib_rules_ops *ops)
82{
83 struct fib_rule *rule, *tmp;
84
85 list_for_each_entry_safe(rule, tmp, ops->rules_list, list) {
86 list_del_rcu(&rule->list);
87 fib_rule_put(rule);
88 }
89}
90
91int fib_rules_unregister(struct fib_rules_ops *ops)
92{
93 int err = 0;
94 struct fib_rules_ops *o;
95
96 spin_lock(&rules_mod_lock);
97 list_for_each_entry(o, &rules_ops, list) {
98 if (o == ops) {
99 list_del_rcu(&o->list);
100 cleanup_ops(ops);
101 goto out;
102 }
103 }
104
105 err = -ENOENT;
106out:
107 spin_unlock(&rules_mod_lock);
108
109 synchronize_rcu();
110
111 return err;
112}
113
114EXPORT_SYMBOL_GPL(fib_rules_unregister);
115
Thomas Graf3dfbcc42006-11-09 15:23:20 -0800116static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
117 struct flowi *fl, int flags)
118{
119 int ret = 0;
120
121 if (rule->ifindex && (rule->ifindex != fl->iif))
122 goto out;
123
124 if ((rule->mark ^ fl->mark) & rule->mark_mask)
125 goto out;
126
127 ret = ops->match(rule, fl, flags);
128out:
129 return (rule->flags & FIB_RULE_INVERT) ? !ret : ret;
130}
131
Thomas Graf14c0b972006-08-04 03:38:38 -0700132int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl,
133 int flags, struct fib_lookup_arg *arg)
134{
135 struct fib_rule *rule;
136 int err;
137
138 rcu_read_lock();
139
140 list_for_each_entry_rcu(rule, ops->rules_list, list) {
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700141jumped:
Thomas Graf3dfbcc42006-11-09 15:23:20 -0800142 if (!fib_rule_match(rule, ops, fl, flags))
Thomas Graf14c0b972006-08-04 03:38:38 -0700143 continue;
144
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700145 if (rule->action == FR_ACT_GOTO) {
146 struct fib_rule *target;
147
148 target = rcu_dereference(rule->ctarget);
149 if (target == NULL) {
150 continue;
151 } else {
152 rule = target;
153 goto jumped;
154 }
Thomas Graffa0b2d12007-03-26 17:38:53 -0700155 } else if (rule->action == FR_ACT_NOP)
156 continue;
157 else
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700158 err = ops->action(rule, fl, flags, arg);
159
Thomas Graf14c0b972006-08-04 03:38:38 -0700160 if (err != -EAGAIN) {
161 fib_rule_get(rule);
162 arg->rule = rule;
163 goto out;
164 }
165 }
166
Steven Whitehouse83886b62007-03-30 13:34:27 -0700167 err = -ESRCH;
Thomas Graf14c0b972006-08-04 03:38:38 -0700168out:
169 rcu_read_unlock();
170
171 return err;
172}
173
174EXPORT_SYMBOL_GPL(fib_rules_lookup);
175
Thomas Grafe1701c62007-03-24 12:46:02 -0700176static int validate_rulemsg(struct fib_rule_hdr *frh, struct nlattr **tb,
177 struct fib_rules_ops *ops)
178{
179 int err = -EINVAL;
180
181 if (frh->src_len)
182 if (tb[FRA_SRC] == NULL ||
183 frh->src_len > (ops->addr_size * 8) ||
184 nla_len(tb[FRA_SRC]) != ops->addr_size)
185 goto errout;
186
187 if (frh->dst_len)
188 if (tb[FRA_DST] == NULL ||
189 frh->dst_len > (ops->addr_size * 8) ||
190 nla_len(tb[FRA_DST]) != ops->addr_size)
191 goto errout;
192
193 err = 0;
194errout:
195 return err;
196}
197
Thomas Graf9d9e6a52007-03-25 23:20:05 -0700198static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Thomas Graf14c0b972006-08-04 03:38:38 -0700199{
200 struct fib_rule_hdr *frh = nlmsg_data(nlh);
201 struct fib_rules_ops *ops = NULL;
202 struct fib_rule *rule, *r, *last = NULL;
203 struct nlattr *tb[FRA_MAX+1];
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700204 int err = -EINVAL, unresolved = 0;
Thomas Graf14c0b972006-08-04 03:38:38 -0700205
206 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
207 goto errout;
208
209 ops = lookup_rules_ops(frh->family);
210 if (ops == NULL) {
211 err = EAFNOSUPPORT;
212 goto errout;
213 }
214
215 err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy);
216 if (err < 0)
217 goto errout;
218
Thomas Grafe1701c62007-03-24 12:46:02 -0700219 err = validate_rulemsg(frh, tb, ops);
220 if (err < 0)
221 goto errout;
222
Thomas Graf14c0b972006-08-04 03:38:38 -0700223 rule = kzalloc(ops->rule_size, GFP_KERNEL);
224 if (rule == NULL) {
225 err = -ENOMEM;
226 goto errout;
227 }
228
229 if (tb[FRA_PRIORITY])
230 rule->pref = nla_get_u32(tb[FRA_PRIORITY]);
231
232 if (tb[FRA_IFNAME]) {
233 struct net_device *dev;
234
235 rule->ifindex = -1;
Thomas Graf5176f912006-08-26 20:13:18 -0700236 nla_strlcpy(rule->ifname, tb[FRA_IFNAME], IFNAMSIZ);
Thomas Graf14c0b972006-08-04 03:38:38 -0700237 dev = __dev_get_by_name(rule->ifname);
238 if (dev)
239 rule->ifindex = dev->ifindex;
240 }
241
Thomas Grafb8964ed2006-11-09 15:22:18 -0800242 if (tb[FRA_FWMARK]) {
243 rule->mark = nla_get_u32(tb[FRA_FWMARK]);
244 if (rule->mark)
245 /* compatibility: if the mark value is non-zero all bits
246 * are compared unless a mask is explicitly specified.
247 */
248 rule->mark_mask = 0xFFFFFFFF;
249 }
250
251 if (tb[FRA_FWMASK])
252 rule->mark_mask = nla_get_u32(tb[FRA_FWMASK]);
253
Thomas Graf14c0b972006-08-04 03:38:38 -0700254 rule->action = frh->action;
255 rule->flags = frh->flags;
Patrick McHardy9e762a42006-08-10 23:09:48 -0700256 rule->table = frh_get_table(frh, tb);
Thomas Graf14c0b972006-08-04 03:38:38 -0700257
258 if (!rule->pref && ops->default_pref)
259 rule->pref = ops->default_pref();
260
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700261 err = -EINVAL;
262 if (tb[FRA_GOTO]) {
263 if (rule->action != FR_ACT_GOTO)
264 goto errout_free;
265
266 rule->target = nla_get_u32(tb[FRA_GOTO]);
267 /* Backward jumps are prohibited to avoid endless loops */
268 if (rule->target <= rule->pref)
269 goto errout_free;
270
271 list_for_each_entry(r, ops->rules_list, list) {
272 if (r->pref == rule->target) {
273 rule->ctarget = r;
274 break;
275 }
276 }
277
278 if (rule->ctarget == NULL)
279 unresolved = 1;
280 } else if (rule->action == FR_ACT_GOTO)
281 goto errout_free;
282
Thomas Graf14c0b972006-08-04 03:38:38 -0700283 err = ops->configure(rule, skb, nlh, frh, tb);
284 if (err < 0)
285 goto errout_free;
286
287 list_for_each_entry(r, ops->rules_list, list) {
288 if (r->pref > rule->pref)
289 break;
290 last = r;
291 }
292
293 fib_rule_get(rule);
294
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700295 if (ops->unresolved_rules) {
296 /*
297 * There are unresolved goto rules in the list, check if
298 * any of them are pointing to this new rule.
299 */
300 list_for_each_entry(r, ops->rules_list, list) {
301 if (r->action == FR_ACT_GOTO &&
302 r->target == rule->pref) {
303 BUG_ON(r->ctarget != NULL);
304 rcu_assign_pointer(r->ctarget, rule);
305 if (--ops->unresolved_rules == 0)
306 break;
307 }
308 }
309 }
310
311 if (rule->action == FR_ACT_GOTO)
312 ops->nr_goto_rules++;
313
314 if (unresolved)
315 ops->unresolved_rules++;
316
Thomas Graf14c0b972006-08-04 03:38:38 -0700317 if (last)
318 list_add_rcu(&rule->list, &last->list);
319 else
320 list_add_rcu(&rule->list, ops->rules_list);
321
Thomas Grafc17084d2006-08-15 00:32:48 -0700322 notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid);
Thomas Graf73417f62007-03-27 13:56:52 -0700323 flush_route_cache(ops);
Thomas Graf14c0b972006-08-04 03:38:38 -0700324 rules_ops_put(ops);
325 return 0;
326
327errout_free:
328 kfree(rule);
329errout:
330 rules_ops_put(ops);
331 return err;
332}
333
Thomas Graf9d9e6a52007-03-25 23:20:05 -0700334static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Thomas Graf14c0b972006-08-04 03:38:38 -0700335{
336 struct fib_rule_hdr *frh = nlmsg_data(nlh);
337 struct fib_rules_ops *ops = NULL;
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700338 struct fib_rule *rule, *tmp;
Thomas Graf14c0b972006-08-04 03:38:38 -0700339 struct nlattr *tb[FRA_MAX+1];
340 int err = -EINVAL;
341
342 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
343 goto errout;
344
345 ops = lookup_rules_ops(frh->family);
346 if (ops == NULL) {
347 err = EAFNOSUPPORT;
348 goto errout;
349 }
350
351 err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy);
352 if (err < 0)
353 goto errout;
354
Thomas Grafe1701c62007-03-24 12:46:02 -0700355 err = validate_rulemsg(frh, tb, ops);
356 if (err < 0)
357 goto errout;
358
Thomas Graf14c0b972006-08-04 03:38:38 -0700359 list_for_each_entry(rule, ops->rules_list, list) {
360 if (frh->action && (frh->action != rule->action))
361 continue;
362
Patrick McHardy9e762a42006-08-10 23:09:48 -0700363 if (frh->table && (frh_get_table(frh, tb) != rule->table))
Thomas Graf14c0b972006-08-04 03:38:38 -0700364 continue;
365
366 if (tb[FRA_PRIORITY] &&
367 (rule->pref != nla_get_u32(tb[FRA_PRIORITY])))
368 continue;
369
370 if (tb[FRA_IFNAME] &&
371 nla_strcmp(tb[FRA_IFNAME], rule->ifname))
372 continue;
373
Thomas Grafb8964ed2006-11-09 15:22:18 -0800374 if (tb[FRA_FWMARK] &&
375 (rule->mark != nla_get_u32(tb[FRA_FWMARK])))
376 continue;
377
378 if (tb[FRA_FWMASK] &&
379 (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK])))
380 continue;
381
Thomas Graf14c0b972006-08-04 03:38:38 -0700382 if (!ops->compare(rule, frh, tb))
383 continue;
384
385 if (rule->flags & FIB_RULE_PERMANENT) {
386 err = -EPERM;
387 goto errout;
388 }
389
390 list_del_rcu(&rule->list);
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700391
392 if (rule->action == FR_ACT_GOTO)
393 ops->nr_goto_rules--;
394
395 /*
396 * Check if this rule is a target to any of them. If so,
397 * disable them. As this operation is eventually very
398 * expensive, it is only performed if goto rules have
399 * actually been added.
400 */
401 if (ops->nr_goto_rules > 0) {
402 list_for_each_entry(tmp, ops->rules_list, list) {
403 if (tmp->ctarget == rule) {
404 rcu_assign_pointer(tmp->ctarget, NULL);
405 ops->unresolved_rules++;
406 }
407 }
408 }
409
Thomas Graf14c0b972006-08-04 03:38:38 -0700410 synchronize_rcu();
Thomas Grafc17084d2006-08-15 00:32:48 -0700411 notify_rule_change(RTM_DELRULE, rule, ops, nlh,
412 NETLINK_CB(skb).pid);
Thomas Graf14c0b972006-08-04 03:38:38 -0700413 fib_rule_put(rule);
Thomas Graf73417f62007-03-27 13:56:52 -0700414 flush_route_cache(ops);
Thomas Graf14c0b972006-08-04 03:38:38 -0700415 rules_ops_put(ops);
416 return 0;
417 }
418
419 err = -ENOENT;
420errout:
421 rules_ops_put(ops);
422 return err;
423}
424
Thomas Graf339bf982006-11-10 14:10:15 -0800425static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops,
426 struct fib_rule *rule)
427{
428 size_t payload = NLMSG_ALIGN(sizeof(struct fib_rule_hdr))
429 + nla_total_size(IFNAMSIZ) /* FRA_IFNAME */
430 + nla_total_size(4) /* FRA_PRIORITY */
431 + nla_total_size(4) /* FRA_TABLE */
432 + nla_total_size(4) /* FRA_FWMARK */
433 + nla_total_size(4); /* FRA_FWMASK */
434
435 if (ops->nlmsg_payload)
436 payload += ops->nlmsg_payload(rule);
437
438 return payload;
439}
440
Thomas Graf14c0b972006-08-04 03:38:38 -0700441static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
442 u32 pid, u32 seq, int type, int flags,
443 struct fib_rules_ops *ops)
444{
445 struct nlmsghdr *nlh;
446 struct fib_rule_hdr *frh;
447
448 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*frh), flags);
449 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800450 return -EMSGSIZE;
Thomas Graf14c0b972006-08-04 03:38:38 -0700451
452 frh = nlmsg_data(nlh);
453 frh->table = rule->table;
Patrick McHardy9e762a42006-08-10 23:09:48 -0700454 NLA_PUT_U32(skb, FRA_TABLE, rule->table);
Thomas Graf14c0b972006-08-04 03:38:38 -0700455 frh->res1 = 0;
456 frh->res2 = 0;
457 frh->action = rule->action;
458 frh->flags = rule->flags;
459
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700460 if (rule->action == FR_ACT_GOTO && rule->ctarget == NULL)
461 frh->flags |= FIB_RULE_UNRESOLVED;
462
Thomas Graf2b443682007-03-26 17:37:59 -0700463 if (rule->ifname[0]) {
Thomas Graf14c0b972006-08-04 03:38:38 -0700464 NLA_PUT_STRING(skb, FRA_IFNAME, rule->ifname);
465
Thomas Graf2b443682007-03-26 17:37:59 -0700466 if (rule->ifindex == -1)
467 frh->flags |= FIB_RULE_DEV_DETACHED;
468 }
469
Thomas Graf14c0b972006-08-04 03:38:38 -0700470 if (rule->pref)
471 NLA_PUT_U32(skb, FRA_PRIORITY, rule->pref);
472
Thomas Grafb8964ed2006-11-09 15:22:18 -0800473 if (rule->mark)
474 NLA_PUT_U32(skb, FRA_FWMARK, rule->mark);
475
476 if (rule->mark_mask || rule->mark)
477 NLA_PUT_U32(skb, FRA_FWMASK, rule->mark_mask);
478
Thomas Graf0947c9fe2007-03-26 17:14:15 -0700479 if (rule->target)
480 NLA_PUT_U32(skb, FRA_GOTO, rule->target);
481
Thomas Graf14c0b972006-08-04 03:38:38 -0700482 if (ops->fill(rule, skb, nlh, frh) < 0)
483 goto nla_put_failure;
484
485 return nlmsg_end(skb, nlh);
486
487nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800488 nlmsg_cancel(skb, nlh);
489 return -EMSGSIZE;
Thomas Graf14c0b972006-08-04 03:38:38 -0700490}
491
Thomas Grafc4546732007-03-25 23:24:24 -0700492static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb,
493 struct fib_rules_ops *ops)
Thomas Graf14c0b972006-08-04 03:38:38 -0700494{
495 int idx = 0;
496 struct fib_rule *rule;
Thomas Graf14c0b972006-08-04 03:38:38 -0700497
Patrick McHardy6313c1e2007-04-16 17:00:53 -0700498 list_for_each_entry(rule, ops->rules_list, list) {
Thomas Grafc4546732007-03-25 23:24:24 -0700499 if (idx < cb->args[1])
Thomas Graf14c0b972006-08-04 03:38:38 -0700500 goto skip;
501
502 if (fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).pid,
503 cb->nlh->nlmsg_seq, RTM_NEWRULE,
504 NLM_F_MULTI, ops) < 0)
505 break;
506skip:
507 idx++;
508 }
Thomas Grafc4546732007-03-25 23:24:24 -0700509 cb->args[1] = idx;
Thomas Graf14c0b972006-08-04 03:38:38 -0700510 rules_ops_put(ops);
511
512 return skb->len;
513}
514
Thomas Grafc4546732007-03-25 23:24:24 -0700515static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
516{
517 struct fib_rules_ops *ops;
518 int idx = 0, family;
519
520 family = rtnl_msg_family(cb->nlh);
521 if (family != AF_UNSPEC) {
522 /* Protocol specific dump request */
523 ops = lookup_rules_ops(family);
524 if (ops == NULL)
525 return -EAFNOSUPPORT;
526
527 return dump_rules(skb, cb, ops);
528 }
529
530 rcu_read_lock();
531 list_for_each_entry_rcu(ops, &rules_ops, list) {
532 if (idx < cb->args[0] || !try_module_get(ops->owner))
533 goto skip;
534
535 if (dump_rules(skb, cb, ops) < 0)
536 break;
537
538 cb->args[1] = 0;
539 skip:
540 idx++;
541 }
542 rcu_read_unlock();
543 cb->args[0] = idx;
544
545 return skb->len;
546}
Thomas Graf14c0b972006-08-04 03:38:38 -0700547
548static void notify_rule_change(int event, struct fib_rule *rule,
Thomas Grafc17084d2006-08-15 00:32:48 -0700549 struct fib_rules_ops *ops, struct nlmsghdr *nlh,
550 u32 pid)
Thomas Graf14c0b972006-08-04 03:38:38 -0700551{
Thomas Grafc17084d2006-08-15 00:32:48 -0700552 struct sk_buff *skb;
553 int err = -ENOBUFS;
Thomas Graf14c0b972006-08-04 03:38:38 -0700554
Thomas Graf339bf982006-11-10 14:10:15 -0800555 skb = nlmsg_new(fib_rule_nlmsg_size(ops, rule), GFP_KERNEL);
Thomas Graf14c0b972006-08-04 03:38:38 -0700556 if (skb == NULL)
Thomas Grafc17084d2006-08-15 00:32:48 -0700557 goto errout;
558
559 err = fib_nl_fill_rule(skb, rule, pid, nlh->nlmsg_seq, event, 0, ops);
Patrick McHardy26932562007-01-31 23:16:40 -0800560 if (err < 0) {
561 /* -EMSGSIZE implies BUG in fib_rule_nlmsg_size() */
562 WARN_ON(err == -EMSGSIZE);
563 kfree_skb(skb);
564 goto errout;
565 }
Thomas Grafc17084d2006-08-15 00:32:48 -0700566 err = rtnl_notify(skb, pid, ops->nlgroup, nlh, GFP_KERNEL);
567errout:
568 if (err < 0)
569 rtnl_set_sk_err(ops->nlgroup, err);
Thomas Graf14c0b972006-08-04 03:38:38 -0700570}
571
572static void attach_rules(struct list_head *rules, struct net_device *dev)
573{
574 struct fib_rule *rule;
575
576 list_for_each_entry(rule, rules, list) {
577 if (rule->ifindex == -1 &&
578 strcmp(dev->name, rule->ifname) == 0)
579 rule->ifindex = dev->ifindex;
580 }
581}
582
583static void detach_rules(struct list_head *rules, struct net_device *dev)
584{
585 struct fib_rule *rule;
586
587 list_for_each_entry(rule, rules, list)
588 if (rule->ifindex == dev->ifindex)
589 rule->ifindex = -1;
590}
591
592
593static int fib_rules_event(struct notifier_block *this, unsigned long event,
594 void *ptr)
595{
596 struct net_device *dev = ptr;
597 struct fib_rules_ops *ops;
598
599 ASSERT_RTNL();
600 rcu_read_lock();
601
602 switch (event) {
603 case NETDEV_REGISTER:
604 list_for_each_entry(ops, &rules_ops, list)
605 attach_rules(ops->rules_list, dev);
606 break;
607
608 case NETDEV_UNREGISTER:
609 list_for_each_entry(ops, &rules_ops, list)
610 detach_rules(ops->rules_list, dev);
611 break;
612 }
613
614 rcu_read_unlock();
615
616 return NOTIFY_DONE;
617}
618
619static struct notifier_block fib_rules_notifier = {
620 .notifier_call = fib_rules_event,
621};
622
623static int __init fib_rules_init(void)
624{
Thomas Graf9d9e6a52007-03-25 23:20:05 -0700625 rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL);
626 rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL);
Thomas Grafc4546732007-03-25 23:24:24 -0700627 rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule);
Thomas Graf9d9e6a52007-03-25 23:20:05 -0700628
Thomas Graf14c0b972006-08-04 03:38:38 -0700629 return register_netdevice_notifier(&fib_rules_notifier);
630}
631
632subsys_initcall(fib_rules_init);