2 * net/core/fib_rules.c Generic Routing Rules
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.
8 * Authors: Thomas Graf <tgraf@suug.ch>
11 #include <linux/types.h>
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <net/net_namespace.h>
18 #include <net/fib_rules.h>
19 #include <net/ip_tunnels.h>
21 static const struct fib_kuid_range fib_kuid_range_unset = {
26 bool fib_rule_matchall(const struct fib_rule *rule)
28 if (rule->iifindex || rule->oifindex || rule->mark || rule->tun_id ||
31 if (rule->suppress_ifgroup != -1 || rule->suppress_prefixlen != -1)
33 if (!uid_eq(rule->uid_range.start, fib_kuid_range_unset.start) ||
34 !uid_eq(rule->uid_range.end, fib_kuid_range_unset.end))
38 EXPORT_SYMBOL_GPL(fib_rule_matchall);
40 int fib_default_rule_add(struct fib_rules_ops *ops,
41 u32 pref, u32 table, u32 flags)
45 r = kzalloc(ops->rule_size, GFP_KERNEL);
49 refcount_set(&r->refcnt, 1);
50 r->action = FR_ACT_TO_TBL;
54 r->fr_net = ops->fro_net;
55 r->uid_range = fib_kuid_range_unset;
57 r->suppress_prefixlen = -1;
58 r->suppress_ifgroup = -1;
60 /* The lock is not required here, the list in unreacheable
61 * at the moment this function is called */
62 list_add_tail(&r->list, &ops->rules_list);
65 EXPORT_SYMBOL(fib_default_rule_add);
67 static u32 fib_default_rule_pref(struct fib_rules_ops *ops)
69 struct list_head *pos;
70 struct fib_rule *rule;
72 if (!list_empty(&ops->rules_list)) {
73 pos = ops->rules_list.next;
74 if (pos->next != &ops->rules_list) {
75 rule = list_entry(pos->next, struct fib_rule, list);
77 return rule->pref - 1;
84 static void notify_rule_change(int event, struct fib_rule *rule,
85 struct fib_rules_ops *ops, struct nlmsghdr *nlh,
88 static struct fib_rules_ops *lookup_rules_ops(struct net *net, int family)
90 struct fib_rules_ops *ops;
93 list_for_each_entry_rcu(ops, &net->rules_ops, list) {
94 if (ops->family == family) {
95 if (!try_module_get(ops->owner))
106 static void rules_ops_put(struct fib_rules_ops *ops)
109 module_put(ops->owner);
112 static void flush_route_cache(struct fib_rules_ops *ops)
114 if (ops->flush_cache)
115 ops->flush_cache(ops);
118 static int __fib_rules_register(struct fib_rules_ops *ops)
121 struct fib_rules_ops *o;
126 if (ops->rule_size < sizeof(struct fib_rule))
129 if (ops->match == NULL || ops->configure == NULL ||
130 ops->compare == NULL || ops->fill == NULL ||
134 spin_lock(&net->rules_mod_lock);
135 list_for_each_entry(o, &net->rules_ops, list)
136 if (ops->family == o->family)
139 list_add_tail_rcu(&ops->list, &net->rules_ops);
142 spin_unlock(&net->rules_mod_lock);
147 struct fib_rules_ops *
148 fib_rules_register(const struct fib_rules_ops *tmpl, struct net *net)
150 struct fib_rules_ops *ops;
153 ops = kmemdup(tmpl, sizeof(*ops), GFP_KERNEL);
155 return ERR_PTR(-ENOMEM);
157 INIT_LIST_HEAD(&ops->rules_list);
160 err = __fib_rules_register(ops);
168 EXPORT_SYMBOL_GPL(fib_rules_register);
170 static void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
172 struct fib_rule *rule, *tmp;
174 list_for_each_entry_safe(rule, tmp, &ops->rules_list, list) {
175 list_del_rcu(&rule->list);
182 void fib_rules_unregister(struct fib_rules_ops *ops)
184 struct net *net = ops->fro_net;
186 spin_lock(&net->rules_mod_lock);
187 list_del_rcu(&ops->list);
188 spin_unlock(&net->rules_mod_lock);
190 fib_rules_cleanup_ops(ops);
193 EXPORT_SYMBOL_GPL(fib_rules_unregister);
195 static int uid_range_set(struct fib_kuid_range *range)
197 return uid_valid(range->start) && uid_valid(range->end);
200 static struct fib_kuid_range nla_get_kuid_range(struct nlattr **tb)
202 struct fib_rule_uid_range *in;
203 struct fib_kuid_range out;
205 in = (struct fib_rule_uid_range *)nla_data(tb[FRA_UID_RANGE]);
207 out.start = make_kuid(current_user_ns(), in->start);
208 out.end = make_kuid(current_user_ns(), in->end);
213 static int nla_put_uid_range(struct sk_buff *skb, struct fib_kuid_range *range)
215 struct fib_rule_uid_range out = {
216 from_kuid_munged(current_user_ns(), range->start),
217 from_kuid_munged(current_user_ns(), range->end)
220 return nla_put(skb, FRA_UID_RANGE, sizeof(out), &out);
223 static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
224 struct flowi *fl, int flags,
225 struct fib_lookup_arg *arg)
229 if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
232 if (rule->oifindex && (rule->oifindex != fl->flowi_oif))
235 if ((rule->mark ^ fl->flowi_mark) & rule->mark_mask)
238 if (rule->tun_id && (rule->tun_id != fl->flowi_tun_key.tun_id))
241 if (rule->l3mdev && !l3mdev_fib_rule_match(rule->fr_net, fl, arg))
244 if (uid_lt(fl->flowi_uid, rule->uid_range.start) ||
245 uid_gt(fl->flowi_uid, rule->uid_range.end))
248 ret = ops->match(rule, fl, flags);
250 return (rule->flags & FIB_RULE_INVERT) ? !ret : ret;
253 int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl,
254 int flags, struct fib_lookup_arg *arg)
256 struct fib_rule *rule;
261 list_for_each_entry_rcu(rule, &ops->rules_list, list) {
263 if (!fib_rule_match(rule, ops, fl, flags, arg))
266 if (rule->action == FR_ACT_GOTO) {
267 struct fib_rule *target;
269 target = rcu_dereference(rule->ctarget);
270 if (target == NULL) {
276 } else if (rule->action == FR_ACT_NOP)
279 err = ops->action(rule, fl, flags, arg);
281 if (!err && ops->suppress && ops->suppress(rule, arg))
284 if (err != -EAGAIN) {
285 if ((arg->flags & FIB_LOOKUP_NOREF) ||
286 likely(refcount_inc_not_zero(&rule->refcnt))) {
300 EXPORT_SYMBOL_GPL(fib_rules_lookup);
302 static int call_fib_rule_notifier(struct notifier_block *nb, struct net *net,
303 enum fib_event_type event_type,
304 struct fib_rule *rule, int family)
306 struct fib_rule_notifier_info info = {
307 .info.family = family,
311 return call_fib_notifier(nb, net, event_type, &info.info);
314 static int call_fib_rule_notifiers(struct net *net,
315 enum fib_event_type event_type,
316 struct fib_rule *rule,
317 struct fib_rules_ops *ops)
319 struct fib_rule_notifier_info info = {
320 .info.family = ops->family,
324 ops->fib_rules_seq++;
325 return call_fib_notifiers(net, event_type, &info.info);
328 /* Called with rcu_read_lock() */
329 int fib_rules_dump(struct net *net, struct notifier_block *nb, int family)
331 struct fib_rules_ops *ops;
332 struct fib_rule *rule;
334 ops = lookup_rules_ops(net, family);
336 return -EAFNOSUPPORT;
337 list_for_each_entry_rcu(rule, &ops->rules_list, list)
338 call_fib_rule_notifier(nb, net, FIB_EVENT_RULE_ADD, rule,
344 EXPORT_SYMBOL_GPL(fib_rules_dump);
346 unsigned int fib_rules_seq_read(struct net *net, int family)
348 unsigned int fib_rules_seq;
349 struct fib_rules_ops *ops;
353 ops = lookup_rules_ops(net, family);
356 fib_rules_seq = ops->fib_rules_seq;
359 return fib_rules_seq;
361 EXPORT_SYMBOL_GPL(fib_rules_seq_read);
363 static int validate_rulemsg(struct fib_rule_hdr *frh, struct nlattr **tb,
364 struct fib_rules_ops *ops)
369 if (tb[FRA_SRC] == NULL ||
370 frh->src_len > (ops->addr_size * 8) ||
371 nla_len(tb[FRA_SRC]) != ops->addr_size)
375 if (tb[FRA_DST] == NULL ||
376 frh->dst_len > (ops->addr_size * 8) ||
377 nla_len(tb[FRA_DST]) != ops->addr_size)
385 static int rule_exists(struct fib_rules_ops *ops, struct fib_rule_hdr *frh,
386 struct nlattr **tb, struct fib_rule *rule)
390 list_for_each_entry(r, &ops->rules_list, list) {
391 if (r->action != rule->action)
394 if (r->table != rule->table)
397 if (r->pref != rule->pref)
400 if (memcmp(r->iifname, rule->iifname, IFNAMSIZ))
403 if (memcmp(r->oifname, rule->oifname, IFNAMSIZ))
406 if (r->mark != rule->mark)
409 if (r->mark_mask != rule->mark_mask)
412 if (r->tun_id != rule->tun_id)
415 if (r->fr_net != rule->fr_net)
418 if (r->l3mdev != rule->l3mdev)
421 if (!uid_eq(r->uid_range.start, rule->uid_range.start) ||
422 !uid_eq(r->uid_range.end, rule->uid_range.end))
425 if (!ops->compare(r, frh, tb))
432 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
433 struct netlink_ext_ack *extack)
435 struct net *net = sock_net(skb->sk);
436 struct fib_rule_hdr *frh = nlmsg_data(nlh);
437 struct fib_rules_ops *ops = NULL;
438 struct fib_rule *rule, *r, *last = NULL;
439 struct nlattr *tb[FRA_MAX+1];
440 int err = -EINVAL, unresolved = 0;
442 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
445 ops = lookup_rules_ops(net, frh->family);
451 err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack);
455 err = validate_rulemsg(frh, tb, ops);
459 rule = kzalloc(ops->rule_size, GFP_KERNEL);
464 refcount_set(&rule->refcnt, 1);
467 rule->pref = tb[FRA_PRIORITY] ? nla_get_u32(tb[FRA_PRIORITY])
468 : fib_default_rule_pref(ops);
470 if (tb[FRA_IIFNAME]) {
471 struct net_device *dev;
474 nla_strlcpy(rule->iifname, tb[FRA_IIFNAME], IFNAMSIZ);
475 dev = __dev_get_by_name(net, rule->iifname);
477 rule->iifindex = dev->ifindex;
480 if (tb[FRA_OIFNAME]) {
481 struct net_device *dev;
484 nla_strlcpy(rule->oifname, tb[FRA_OIFNAME], IFNAMSIZ);
485 dev = __dev_get_by_name(net, rule->oifname);
487 rule->oifindex = dev->ifindex;
490 if (tb[FRA_FWMARK]) {
491 rule->mark = nla_get_u32(tb[FRA_FWMARK]);
493 /* compatibility: if the mark value is non-zero all bits
494 * are compared unless a mask is explicitly specified.
496 rule->mark_mask = 0xFFFFFFFF;
500 rule->mark_mask = nla_get_u32(tb[FRA_FWMASK]);
503 rule->tun_id = nla_get_be64(tb[FRA_TUN_ID]);
506 if (tb[FRA_L3MDEV]) {
507 #ifdef CONFIG_NET_L3_MASTER_DEV
508 rule->l3mdev = nla_get_u8(tb[FRA_L3MDEV]);
509 if (rule->l3mdev != 1)
514 rule->action = frh->action;
515 rule->flags = frh->flags;
516 rule->table = frh_get_table(frh, tb);
517 if (tb[FRA_SUPPRESS_PREFIXLEN])
518 rule->suppress_prefixlen = nla_get_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
520 rule->suppress_prefixlen = -1;
522 if (tb[FRA_SUPPRESS_IFGROUP])
523 rule->suppress_ifgroup = nla_get_u32(tb[FRA_SUPPRESS_IFGROUP]);
525 rule->suppress_ifgroup = -1;
528 if (rule->action != FR_ACT_GOTO)
531 rule->target = nla_get_u32(tb[FRA_GOTO]);
532 /* Backward jumps are prohibited to avoid endless loops */
533 if (rule->target <= rule->pref)
536 list_for_each_entry(r, &ops->rules_list, list) {
537 if (r->pref == rule->target) {
538 RCU_INIT_POINTER(rule->ctarget, r);
543 if (rcu_dereference_protected(rule->ctarget, 1) == NULL)
545 } else if (rule->action == FR_ACT_GOTO)
548 if (rule->l3mdev && rule->table)
551 if (tb[FRA_UID_RANGE]) {
552 if (current_user_ns() != net->user_ns) {
557 rule->uid_range = nla_get_kuid_range(tb);
559 if (!uid_range_set(&rule->uid_range) ||
560 !uid_lte(rule->uid_range.start, rule->uid_range.end))
563 rule->uid_range = fib_kuid_range_unset;
566 if ((nlh->nlmsg_flags & NLM_F_EXCL) &&
567 rule_exists(ops, frh, tb, rule)) {
572 err = ops->configure(rule, skb, frh, tb);
576 list_for_each_entry(r, &ops->rules_list, list) {
577 if (r->pref > rule->pref)
583 list_add_rcu(&rule->list, &last->list);
585 list_add_rcu(&rule->list, &ops->rules_list);
587 if (ops->unresolved_rules) {
589 * There are unresolved goto rules in the list, check if
590 * any of them are pointing to this new rule.
592 list_for_each_entry(r, &ops->rules_list, list) {
593 if (r->action == FR_ACT_GOTO &&
594 r->target == rule->pref &&
595 rtnl_dereference(r->ctarget) == NULL) {
596 rcu_assign_pointer(r->ctarget, rule);
597 if (--ops->unresolved_rules == 0)
603 if (rule->action == FR_ACT_GOTO)
604 ops->nr_goto_rules++;
607 ops->unresolved_rules++;
610 ip_tunnel_need_metadata();
612 call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops);
613 notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid);
614 flush_route_cache(ops);
624 EXPORT_SYMBOL_GPL(fib_nl_newrule);
626 int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
627 struct netlink_ext_ack *extack)
629 struct net *net = sock_net(skb->sk);
630 struct fib_rule_hdr *frh = nlmsg_data(nlh);
631 struct fib_rules_ops *ops = NULL;
632 struct fib_rule *rule, *r;
633 struct nlattr *tb[FRA_MAX+1];
634 struct fib_kuid_range range;
637 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
640 ops = lookup_rules_ops(net, frh->family);
646 err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack);
650 err = validate_rulemsg(frh, tb, ops);
654 if (tb[FRA_UID_RANGE]) {
655 range = nla_get_kuid_range(tb);
656 if (!uid_range_set(&range)) {
661 range = fib_kuid_range_unset;
664 list_for_each_entry(rule, &ops->rules_list, list) {
665 if (frh->action && (frh->action != rule->action))
668 if (frh_get_table(frh, tb) &&
669 (frh_get_table(frh, tb) != rule->table))
672 if (tb[FRA_PRIORITY] &&
673 (rule->pref != nla_get_u32(tb[FRA_PRIORITY])))
676 if (tb[FRA_IIFNAME] &&
677 nla_strcmp(tb[FRA_IIFNAME], rule->iifname))
680 if (tb[FRA_OIFNAME] &&
681 nla_strcmp(tb[FRA_OIFNAME], rule->oifname))
684 if (tb[FRA_FWMARK] &&
685 (rule->mark != nla_get_u32(tb[FRA_FWMARK])))
688 if (tb[FRA_FWMASK] &&
689 (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK])))
692 if (tb[FRA_TUN_ID] &&
693 (rule->tun_id != nla_get_be64(tb[FRA_TUN_ID])))
696 if (tb[FRA_L3MDEV] &&
697 (rule->l3mdev != nla_get_u8(tb[FRA_L3MDEV])))
700 if (uid_range_set(&range) &&
701 (!uid_eq(rule->uid_range.start, range.start) ||
702 !uid_eq(rule->uid_range.end, range.end)))
705 if (!ops->compare(rule, frh, tb))
708 if (rule->flags & FIB_RULE_PERMANENT) {
714 err = ops->delete(rule);
720 ip_tunnel_unneed_metadata();
722 list_del_rcu(&rule->list);
724 if (rule->action == FR_ACT_GOTO) {
725 ops->nr_goto_rules--;
726 if (rtnl_dereference(rule->ctarget) == NULL)
727 ops->unresolved_rules--;
731 * Check if this rule is a target to any of them. If so,
732 * adjust to the next one with the same preference or
733 * disable them. As this operation is eventually very
734 * expensive, it is only performed if goto rules, except
735 * current if it is goto rule, have actually been added.
737 if (ops->nr_goto_rules > 0) {
740 n = list_next_entry(rule, list);
741 if (&n->list == &ops->rules_list || n->pref != rule->pref)
743 list_for_each_entry(r, &ops->rules_list, list) {
744 if (rtnl_dereference(r->ctarget) != rule)
746 rcu_assign_pointer(r->ctarget, n);
748 ops->unresolved_rules++;
752 call_fib_rule_notifiers(net, FIB_EVENT_RULE_DEL, rule, ops);
753 notify_rule_change(RTM_DELRULE, rule, ops, nlh,
754 NETLINK_CB(skb).portid);
756 flush_route_cache(ops);
766 EXPORT_SYMBOL_GPL(fib_nl_delrule);
768 static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops,
769 struct fib_rule *rule)
771 size_t payload = NLMSG_ALIGN(sizeof(struct fib_rule_hdr))
772 + nla_total_size(IFNAMSIZ) /* FRA_IIFNAME */
773 + nla_total_size(IFNAMSIZ) /* FRA_OIFNAME */
774 + nla_total_size(4) /* FRA_PRIORITY */
775 + nla_total_size(4) /* FRA_TABLE */
776 + nla_total_size(4) /* FRA_SUPPRESS_PREFIXLEN */
777 + nla_total_size(4) /* FRA_SUPPRESS_IFGROUP */
778 + nla_total_size(4) /* FRA_FWMARK */
779 + nla_total_size(4) /* FRA_FWMASK */
780 + nla_total_size_64bit(8) /* FRA_TUN_ID */
781 + nla_total_size(sizeof(struct fib_kuid_range));
783 if (ops->nlmsg_payload)
784 payload += ops->nlmsg_payload(rule);
789 static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
790 u32 pid, u32 seq, int type, int flags,
791 struct fib_rules_ops *ops)
793 struct nlmsghdr *nlh;
794 struct fib_rule_hdr *frh;
796 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*frh), flags);
800 frh = nlmsg_data(nlh);
801 frh->family = ops->family;
802 frh->table = rule->table;
803 if (nla_put_u32(skb, FRA_TABLE, rule->table))
804 goto nla_put_failure;
805 if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen))
806 goto nla_put_failure;
809 frh->action = rule->action;
810 frh->flags = rule->flags;
812 if (rule->action == FR_ACT_GOTO &&
813 rcu_access_pointer(rule->ctarget) == NULL)
814 frh->flags |= FIB_RULE_UNRESOLVED;
816 if (rule->iifname[0]) {
817 if (nla_put_string(skb, FRA_IIFNAME, rule->iifname))
818 goto nla_put_failure;
819 if (rule->iifindex == -1)
820 frh->flags |= FIB_RULE_IIF_DETACHED;
823 if (rule->oifname[0]) {
824 if (nla_put_string(skb, FRA_OIFNAME, rule->oifname))
825 goto nla_put_failure;
826 if (rule->oifindex == -1)
827 frh->flags |= FIB_RULE_OIF_DETACHED;
831 nla_put_u32(skb, FRA_PRIORITY, rule->pref)) ||
833 nla_put_u32(skb, FRA_FWMARK, rule->mark)) ||
834 ((rule->mark_mask || rule->mark) &&
835 nla_put_u32(skb, FRA_FWMASK, rule->mark_mask)) ||
837 nla_put_u32(skb, FRA_GOTO, rule->target)) ||
839 nla_put_be64(skb, FRA_TUN_ID, rule->tun_id, FRA_PAD)) ||
841 nla_put_u8(skb, FRA_L3MDEV, rule->l3mdev)) ||
842 (uid_range_set(&rule->uid_range) &&
843 nla_put_uid_range(skb, &rule->uid_range)))
844 goto nla_put_failure;
846 if (rule->suppress_ifgroup != -1) {
847 if (nla_put_u32(skb, FRA_SUPPRESS_IFGROUP, rule->suppress_ifgroup))
848 goto nla_put_failure;
851 if (ops->fill(rule, skb, frh) < 0)
852 goto nla_put_failure;
858 nlmsg_cancel(skb, nlh);
862 static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb,
863 struct fib_rules_ops *ops)
866 struct fib_rule *rule;
870 list_for_each_entry_rcu(rule, &ops->rules_list, list) {
871 if (idx < cb->args[1])
874 err = fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).portid,
875 cb->nlh->nlmsg_seq, RTM_NEWRULE,
889 static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
891 struct net *net = sock_net(skb->sk);
892 struct fib_rules_ops *ops;
895 family = rtnl_msg_family(cb->nlh);
896 if (family != AF_UNSPEC) {
897 /* Protocol specific dump request */
898 ops = lookup_rules_ops(net, family);
900 return -EAFNOSUPPORT;
902 dump_rules(skb, cb, ops);
908 list_for_each_entry_rcu(ops, &net->rules_ops, list) {
909 if (idx < cb->args[0] || !try_module_get(ops->owner))
912 if (dump_rules(skb, cb, ops) < 0)
925 static void notify_rule_change(int event, struct fib_rule *rule,
926 struct fib_rules_ops *ops, struct nlmsghdr *nlh,
934 skb = nlmsg_new(fib_rule_nlmsg_size(ops, rule), GFP_KERNEL);
938 err = fib_nl_fill_rule(skb, rule, pid, nlh->nlmsg_seq, event, 0, ops);
940 /* -EMSGSIZE implies BUG in fib_rule_nlmsg_size() */
941 WARN_ON(err == -EMSGSIZE);
946 rtnl_notify(skb, net, pid, ops->nlgroup, nlh, GFP_KERNEL);
950 rtnl_set_sk_err(net, ops->nlgroup, err);
953 static void attach_rules(struct list_head *rules, struct net_device *dev)
955 struct fib_rule *rule;
957 list_for_each_entry(rule, rules, list) {
958 if (rule->iifindex == -1 &&
959 strcmp(dev->name, rule->iifname) == 0)
960 rule->iifindex = dev->ifindex;
961 if (rule->oifindex == -1 &&
962 strcmp(dev->name, rule->oifname) == 0)
963 rule->oifindex = dev->ifindex;
967 static void detach_rules(struct list_head *rules, struct net_device *dev)
969 struct fib_rule *rule;
971 list_for_each_entry(rule, rules, list) {
972 if (rule->iifindex == dev->ifindex)
974 if (rule->oifindex == dev->ifindex)
980 static int fib_rules_event(struct notifier_block *this, unsigned long event,
983 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
984 struct net *net = dev_net(dev);
985 struct fib_rules_ops *ops;
990 case NETDEV_REGISTER:
991 list_for_each_entry(ops, &net->rules_ops, list)
992 attach_rules(&ops->rules_list, dev);
995 case NETDEV_CHANGENAME:
996 list_for_each_entry(ops, &net->rules_ops, list) {
997 detach_rules(&ops->rules_list, dev);
998 attach_rules(&ops->rules_list, dev);
1002 case NETDEV_UNREGISTER:
1003 list_for_each_entry(ops, &net->rules_ops, list)
1004 detach_rules(&ops->rules_list, dev);
1011 static struct notifier_block fib_rules_notifier = {
1012 .notifier_call = fib_rules_event,
1015 static int __net_init fib_rules_net_init(struct net *net)
1017 INIT_LIST_HEAD(&net->rules_ops);
1018 spin_lock_init(&net->rules_mod_lock);
1022 static struct pernet_operations fib_rules_net_ops = {
1023 .init = fib_rules_net_init,
1026 static int __init fib_rules_init(void)
1029 rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL, 0);
1030 rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL, 0);
1031 rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule, 0);
1033 err = register_pernet_subsys(&fib_rules_net_ops);
1037 err = register_netdevice_notifier(&fib_rules_notifier);
1039 goto fail_unregister;
1044 unregister_pernet_subsys(&fib_rules_net_ops);
1046 rtnl_unregister(PF_UNSPEC, RTM_NEWRULE);
1047 rtnl_unregister(PF_UNSPEC, RTM_DELRULE);
1048 rtnl_unregister(PF_UNSPEC, RTM_GETRULE);
1052 subsys_initcall(fib_rules_init);