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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <[email protected]>
7 */
8
9#ifndef _IP6_FIB_H
10#define _IP6_FIB_H
11
12#include <linux/ipv6_route.h>
13#include <linux/rtnetlink.h>
14#include <linux/spinlock.h>
15#include <linux/notifier.h>
16#include <net/dst.h>
17#include <net/flow.h>
18#include <net/ip_fib.h>
19#include <net/netlink.h>
20#include <net/inetpeer.h>
21#include <net/fib_notifier.h>
22#include <linux/indirect_call_wrapper.h>
23#include <uapi/linux/bpf.h>
24
25#ifdef CONFIG_IPV6_MULTIPLE_TABLES
26#define FIB6_TABLE_HASHSZ 256
27#else
28#define FIB6_TABLE_HASHSZ 1
29#endif
30
31#define RT6_DEBUG 2
32
33struct rt6_info;
34struct fib6_info;
35
36struct fib6_config {
37 u32 fc_table;
38 u32 fc_metric;
39 int fc_dst_len;
40 int fc_src_len;
41 int fc_ifindex;
42 u32 fc_flags;
43 u32 fc_protocol;
44 u16 fc_type; /* only 8 bits are used */
45 u16 fc_delete_all_nh : 1,
46 fc_ignore_dev_down:1,
47 __unused : 14;
48 u32 fc_nh_id;
49
50 struct in6_addr fc_dst;
51 struct in6_addr fc_src;
52 struct in6_addr fc_prefsrc;
53 struct in6_addr fc_gateway;
54
55 unsigned long fc_expires;
56 struct nlattr *fc_mx;
57 int fc_mx_len;
58 int fc_mp_len;
59 struct nlattr *fc_mp;
60
61 struct nl_info fc_nlinfo;
62 struct nlattr *fc_encap;
63 u16 fc_encap_type;
64 bool fc_is_fdb;
65};
66
67struct fib6_node {
68 struct fib6_node __rcu *parent;
69 struct fib6_node __rcu *left;
70 struct fib6_node __rcu *right;
71#ifdef CONFIG_IPV6_SUBTREES
72 struct fib6_node __rcu *subtree;
73#endif
74 struct fib6_info __rcu *leaf;
75
76 __u16 fn_bit; /* bit key */
77 __u16 fn_flags;
78 int fn_sernum;
79 struct fib6_info __rcu *rr_ptr;
80 struct rcu_head rcu;
81};
82
83struct fib6_gc_args {
84 int timeout;
85 int more;
86};
87
88#ifndef CONFIG_IPV6_SUBTREES
89#define FIB6_SUBTREE(fn) NULL
90
91static inline bool fib6_routes_require_src(const struct net *net)
92{
93 return false;
94}
95
96static inline void fib6_routes_require_src_inc(struct net *net) {}
97static inline void fib6_routes_require_src_dec(struct net *net) {}
98
99#else
100
101static inline bool fib6_routes_require_src(const struct net *net)
102{
103 return net->ipv6.fib6_routes_require_src > 0;
104}
105
106static inline void fib6_routes_require_src_inc(struct net *net)
107{
108 net->ipv6.fib6_routes_require_src++;
109}
110
111static inline void fib6_routes_require_src_dec(struct net *net)
112{
113 net->ipv6.fib6_routes_require_src--;
114}
115
116#define FIB6_SUBTREE(fn) (rcu_dereference_protected((fn)->subtree, 1))
117#endif
118
119/*
120 * routing information
121 *
122 */
123
124struct rt6key {
125 struct in6_addr addr;
126 int plen;
127};
128
129struct fib6_table;
130
131struct rt6_exception_bucket {
132 struct hlist_head chain;
133 int depth;
134};
135
136struct rt6_exception {
137 struct hlist_node hlist;
138 struct rt6_info *rt6i;
139 unsigned long stamp;
140 struct rcu_head rcu;
141};
142
143#define FIB6_EXCEPTION_BUCKET_SIZE_SHIFT 10
144#define FIB6_EXCEPTION_BUCKET_SIZE (1 << FIB6_EXCEPTION_BUCKET_SIZE_SHIFT)
145#define FIB6_MAX_DEPTH 5
146
147struct fib6_nh {
148 struct fib_nh_common nh_common;
149
150#ifdef CONFIG_IPV6_ROUTER_PREF
151 unsigned long last_probe;
152#endif
153
154 struct rt6_info * __percpu *rt6i_pcpu;
155 struct rt6_exception_bucket __rcu *rt6i_exception_bucket;
156};
157
158struct fib6_info {
159 struct fib6_table *fib6_table;
160 struct fib6_info __rcu *fib6_next;
161 struct fib6_node __rcu *fib6_node;
162
163 /* Multipath routes:
164 * siblings is a list of fib6_info that have the same metric/weight,
165 * destination, but not the same gateway. nsiblings is just a cache
166 * to speed up lookup.
167 */
168 union {
169 struct list_head fib6_siblings;
170 struct list_head nh_list;
171 };
172 unsigned int fib6_nsiblings;
173
174 refcount_t fib6_ref;
175 unsigned long expires;
176
177 struct hlist_node gc_link;
178
179 struct dst_metrics *fib6_metrics;
180#define fib6_pmtu fib6_metrics->metrics[RTAX_MTU-1]
181
182 struct rt6key fib6_dst;
183 u32 fib6_flags;
184 struct rt6key fib6_src;
185 struct rt6key fib6_prefsrc;
186
187 u32 fib6_metric;
188 u8 fib6_protocol;
189 u8 fib6_type;
190
191 u8 offload;
192 u8 trap;
193 u8 offload_failed;
194
195 u8 should_flush:1,
196 dst_nocount:1,
197 dst_nopolicy:1,
198 fib6_destroying:1,
199 unused:4;
200
201 struct list_head purge_link;
202 struct rcu_head rcu;
203 struct nexthop *nh;
204 struct fib6_nh fib6_nh[];
205};
206
207struct rt6_info {
208 struct dst_entry dst;
209 struct fib6_info __rcu *from;
210 int sernum;
211
212 struct rt6key rt6i_dst;
213 struct rt6key rt6i_src;
214 struct in6_addr rt6i_gateway;
215 struct inet6_dev *rt6i_idev;
216 u32 rt6i_flags;
217
218 /* more non-fragment space at head required */
219 unsigned short rt6i_nfheader_len;
220};
221
222struct fib6_result {
223 struct fib6_nh *nh;
224 struct fib6_info *f6i;
225 u32 fib6_flags;
226 u8 fib6_type;
227 struct rt6_info *rt6;
228};
229
230#define for_each_fib6_node_rt_rcu(fn) \
231 for (rt = rcu_dereference((fn)->leaf); rt; \
232 rt = rcu_dereference(rt->fib6_next))
233
234#define for_each_fib6_walker_rt(w) \
235 for (rt = (w)->leaf; rt; \
236 rt = rcu_dereference_protected(rt->fib6_next, 1))
237
238#define dst_rt6_info(_ptr) container_of_const(_ptr, struct rt6_info, dst)
239
240static inline struct inet6_dev *ip6_dst_idev(const struct dst_entry *dst)
241{
242 return dst_rt6_info(dst)->rt6i_idev;
243}
244
245static inline bool fib6_requires_src(const struct fib6_info *rt)
246{
247 return rt->fib6_src.plen > 0;
248}
249
250/* The callers should hold f6i->fib6_table->tb6_lock if a route has ever
251 * been added to a table before.
252 */
253static inline void fib6_clean_expires(struct fib6_info *f6i)
254{
255 f6i->fib6_flags &= ~RTF_EXPIRES;
256 f6i->expires = 0;
257}
258
259/* The callers should hold f6i->fib6_table->tb6_lock if a route has ever
260 * been added to a table before.
261 */
262static inline void fib6_set_expires(struct fib6_info *f6i,
263 unsigned long expires)
264{
265 f6i->expires = expires;
266 f6i->fib6_flags |= RTF_EXPIRES;
267}
268
269static inline bool fib6_check_expired(const struct fib6_info *f6i)
270{
271 if (f6i->fib6_flags & RTF_EXPIRES)
272 return time_after(jiffies, f6i->expires);
273 return false;
274}
275
276/* Function to safely get fn->fn_sernum for passed in rt
277 * and store result in passed in cookie.
278 * Return true if we can get cookie safely
279 * Return false if not
280 */
281static inline bool fib6_get_cookie_safe(const struct fib6_info *f6i,
282 u32 *cookie)
283{
284 struct fib6_node *fn;
285 bool status = false;
286
287 fn = rcu_dereference(f6i->fib6_node);
288
289 if (fn) {
290 *cookie = READ_ONCE(fn->fn_sernum);
291 /* pairs with smp_wmb() in __fib6_update_sernum_upto_root() */
292 smp_rmb();
293 status = true;
294 }
295
296 return status;
297}
298
299static inline u32 rt6_get_cookie(const struct rt6_info *rt)
300{
301 struct fib6_info *from;
302 u32 cookie = 0;
303
304 if (rt->sernum)
305 return rt->sernum;
306
307 rcu_read_lock();
308
309 from = rcu_dereference(rt->from);
310 if (from)
311 fib6_get_cookie_safe(from, &cookie);
312
313 rcu_read_unlock();
314
315 return cookie;
316}
317
318static inline void ip6_rt_put(struct rt6_info *rt)
319{
320 /* dst_release() accepts a NULL parameter.
321 * We rely on dst being first structure in struct rt6_info
322 */
323 BUILD_BUG_ON(offsetof(struct rt6_info, dst) != 0);
324 dst_release(&rt->dst);
325}
326
327struct fib6_info *fib6_info_alloc(gfp_t gfp_flags, bool with_fib6_nh);
328void fib6_info_destroy_rcu(struct rcu_head *head);
329
330static inline void fib6_info_hold(struct fib6_info *f6i)
331{
332 refcount_inc(&f6i->fib6_ref);
333}
334
335static inline bool fib6_info_hold_safe(struct fib6_info *f6i)
336{
337 return refcount_inc_not_zero(&f6i->fib6_ref);
338}
339
340static inline void fib6_info_release(struct fib6_info *f6i)
341{
342 if (f6i && refcount_dec_and_test(&f6i->fib6_ref)) {
343 DEBUG_NET_WARN_ON_ONCE(!hlist_unhashed(&f6i->gc_link));
344 call_rcu_hurry(&f6i->rcu, fib6_info_destroy_rcu);
345 }
346}
347
348enum fib6_walk_state {
349#ifdef CONFIG_IPV6_SUBTREES
350 FWS_S,
351#endif
352 FWS_L,
353 FWS_R,
354 FWS_C,
355 FWS_U
356};
357
358struct fib6_walker {
359 struct list_head lh;
360 struct fib6_node *root, *node;
361 struct fib6_info *leaf;
362 enum fib6_walk_state state;
363 unsigned int skip;
364 unsigned int count;
365 unsigned int skip_in_node;
366 int (*func)(struct fib6_walker *);
367 void *args;
368};
369
370struct rt6_statistics {
371 __u32 fib_nodes; /* all fib6 nodes */
372 __u32 fib_route_nodes; /* intermediate nodes */
373 __u32 fib_rt_entries; /* rt entries in fib table */
374 __u32 fib_rt_cache; /* cached rt entries in exception table */
375 __u32 fib_discarded_routes; /* total number of routes delete */
376
377 /* The following stat is not protected by any lock */
378 atomic_t fib_rt_alloc; /* total number of routes alloced */
379};
380
381#define RTN_TL_ROOT 0x0001
382#define RTN_ROOT 0x0002 /* tree root node */
383#define RTN_RTINFO 0x0004 /* node with valid routing info */
384
385/*
386 * priority levels (or metrics)
387 *
388 */
389
390
391struct fib6_table {
392 struct hlist_node tb6_hlist;
393 u32 tb6_id;
394 spinlock_t tb6_lock;
395 struct fib6_node tb6_root;
396 struct inet_peer_base tb6_peers;
397 unsigned int flags;
398 unsigned int fib_seq; /* writes protected by rtnl_mutex */
399 struct hlist_head tb6_gc_hlist; /* GC candidates */
400#define RT6_TABLE_HAS_DFLT_ROUTER BIT(0)
401};
402
403#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
404#define RT6_TABLE_MAIN RT_TABLE_MAIN
405#define RT6_TABLE_DFLT RT6_TABLE_MAIN
406#define RT6_TABLE_INFO RT6_TABLE_MAIN
407#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
408
409#ifdef CONFIG_IPV6_MULTIPLE_TABLES
410#define FIB6_TABLE_MIN 1
411#define FIB6_TABLE_MAX RT_TABLE_MAX
412#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
413#else
414#define FIB6_TABLE_MIN RT_TABLE_MAIN
415#define FIB6_TABLE_MAX FIB6_TABLE_MIN
416#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
417#endif
418
419typedef struct rt6_info *(*pol_lookup_t)(struct net *,
420 struct fib6_table *,
421 struct flowi6 *,
422 const struct sk_buff *, int);
423
424struct fib6_entry_notifier_info {
425 struct fib_notifier_info info; /* must be first */
426 struct fib6_info *rt;
427 unsigned int nsiblings;
428};
429
430/*
431 * exported functions
432 */
433
434struct fib6_table *fib6_get_table(struct net *net, u32 id);
435struct fib6_table *fib6_new_table(struct net *net, u32 id);
436struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6,
437 const struct sk_buff *skb,
438 int flags, pol_lookup_t lookup);
439
440/* called with rcu lock held; can return error pointer
441 * caller needs to select path
442 */
443int fib6_lookup(struct net *net, int oif, struct flowi6 *fl6,
444 struct fib6_result *res, int flags);
445
446/* called with rcu lock held; caller needs to select path */
447int fib6_table_lookup(struct net *net, struct fib6_table *table,
448 int oif, struct flowi6 *fl6, struct fib6_result *res,
449 int strict);
450
451void fib6_select_path(const struct net *net, struct fib6_result *res,
452 struct flowi6 *fl6, int oif, bool have_oif_match,
453 const struct sk_buff *skb, int strict);
454struct fib6_node *fib6_node_lookup(struct fib6_node *root,
455 const struct in6_addr *daddr,
456 const struct in6_addr *saddr);
457
458struct fib6_node *fib6_locate(struct fib6_node *root,
459 const struct in6_addr *daddr, int dst_len,
460 const struct in6_addr *saddr, int src_len,
461 bool exact_match);
462
463void fib6_clean_all(struct net *net, int (*func)(struct fib6_info *, void *arg),
464 void *arg);
465void fib6_clean_all_skip_notify(struct net *net,
466 int (*func)(struct fib6_info *, void *arg),
467 void *arg);
468
469int fib6_add(struct fib6_node *root, struct fib6_info *rt,
470 struct nl_info *info, struct netlink_ext_ack *extack);
471int fib6_del(struct fib6_info *rt, struct nl_info *info,
472 enum rt_del_reason del_reason);
473
474static inline
475void rt6_get_prefsrc(const struct rt6_info *rt, struct in6_addr *addr)
476{
477 const struct fib6_info *from;
478
479 rcu_read_lock();
480
481 from = rcu_dereference(rt->from);
482 if (from)
483 *addr = from->fib6_prefsrc.addr;
484 else
485 *addr = in6addr_any;
486
487 rcu_read_unlock();
488}
489
490#if IS_ENABLED(CONFIG_IPV6)
491int fib6_nh_init(struct net *net, struct fib6_nh *fib6_nh,
492 struct fib6_config *cfg, gfp_t gfp_flags,
493 struct netlink_ext_ack *extack);
494void fib6_nh_release(struct fib6_nh *fib6_nh);
495void fib6_nh_release_dsts(struct fib6_nh *fib6_nh);
496#else
497static inline int fib6_nh_init(struct net *net, struct fib6_nh *fib6_nh,
498 struct fib6_config *cfg, gfp_t gfp_flags,
499 struct netlink_ext_ack *extack)
500{
501 NL_SET_ERR_MSG(extack, "IPv6 support not enabled in kernel");
502 return -EAFNOSUPPORT;
503}
504
505static inline void fib6_nh_release(struct fib6_nh *fib6_nh)
506{
507}
508
509static inline void fib6_nh_release_dsts(struct fib6_nh *fib6_nh)
510{
511}
512#endif
513
514
515int call_fib6_entry_notifiers(struct net *net,
516 enum fib_event_type event_type,
517 struct fib6_info *rt,
518 struct netlink_ext_ack *extack);
519int call_fib6_multipath_entry_notifiers(struct net *net,
520 enum fib_event_type event_type,
521 struct fib6_info *rt,
522 unsigned int nsiblings,
523 struct netlink_ext_ack *extack);
524int call_fib6_entry_notifiers_replace(struct net *net, struct fib6_info *rt);
525#if IS_ENABLED(CONFIG_IPV6)
526void fib6_rt_update(struct net *net, struct fib6_info *rt,
527 struct nl_info *info);
528#else
529static inline void fib6_rt_update(struct net *net, struct fib6_info *rt,
530 struct nl_info *info)
531{
532}
533#endif
534void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
535 unsigned int flags);
536void inet6_rt_del_notify(struct fib6_info *rt, struct nl_info *info,
537 enum rt_del_reason del_reason);
538
539void fib6_age_exceptions(struct fib6_info *rt, struct fib6_gc_args *gc_args,
540 unsigned long now);
541void fib6_run_gc(unsigned long expires, struct net *net, bool force);
542void fib6_gc_cleanup(void);
543
544int fib6_init(void);
545
546#if IS_ENABLED(CONFIG_IPV6)
547/* Add the route to the gc list if it is not already there
548 *
549 * The callers should hold f6i->fib6_table->tb6_lock.
550 */
551static inline void fib6_add_gc_list(struct fib6_info *f6i)
552{
553 /* If fib6_node is null, the f6i is not in (or removed from) the
554 * table.
555 *
556 * There is a gap between finding the f6i from the table and
557 * calling this function without the protection of the tb6_lock.
558 * This check makes sure the f6i is not added to the gc list when
559 * it is not on the table.
560 */
561 if (!rcu_dereference_protected(f6i->fib6_node,
562 lockdep_is_held(&f6i->fib6_table->tb6_lock)))
563 return;
564
565 if (hlist_unhashed(&f6i->gc_link))
566 hlist_add_head(&f6i->gc_link, &f6i->fib6_table->tb6_gc_hlist);
567}
568
569/* Remove the route from the gc list if it is on the list.
570 *
571 * The callers should hold f6i->fib6_table->tb6_lock.
572 */
573static inline void fib6_remove_gc_list(struct fib6_info *f6i)
574{
575 if (!hlist_unhashed(&f6i->gc_link))
576 hlist_del_init(&f6i->gc_link);
577}
578
579static inline void fib6_may_remove_gc_list(struct net *net,
580 struct fib6_info *f6i)
581{
582 struct fib6_gc_args gc_args;
583
584 if (hlist_unhashed(&f6i->gc_link))
585 return;
586
587 gc_args.timeout = READ_ONCE(net->ipv6.sysctl.ip6_rt_gc_interval);
588 gc_args.more = 0;
589
590 rcu_read_lock();
591 fib6_age_exceptions(f6i, &gc_args, jiffies);
592 rcu_read_unlock();
593}
594#endif
595
596struct ipv6_route_iter {
597 struct seq_net_private p;
598 struct fib6_walker w;
599 loff_t skip;
600 struct fib6_table *tbl;
601 int sernum;
602};
603
604extern const struct seq_operations ipv6_route_seq_ops;
605
606int call_fib6_notifier(struct notifier_block *nb,
607 enum fib_event_type event_type,
608 struct fib_notifier_info *info);
609int call_fib6_notifiers(struct net *net, enum fib_event_type event_type,
610 struct fib_notifier_info *info);
611
612int __net_init fib6_notifier_init(struct net *net);
613void __net_exit fib6_notifier_exit(struct net *net);
614
615unsigned int fib6_tables_seq_read(const struct net *net);
616int fib6_tables_dump(struct net *net, struct notifier_block *nb,
617 struct netlink_ext_ack *extack);
618
619void fib6_update_sernum(struct net *net, struct fib6_info *rt);
620#if IS_ENABLED(CONFIG_IPV6)
621void fib6_update_sernum_upto_root(struct net *net, struct fib6_info *rt);
622#else
623static inline void fib6_update_sernum_upto_root(struct net *net, struct fib6_info *rt)
624{
625}
626#endif
627
628void fib6_metric_set(struct fib6_info *f6i, int metric, u32 val);
629static inline bool fib6_metric_locked(struct fib6_info *f6i, int metric)
630{
631 return !!(f6i->fib6_metrics->metrics[RTAX_LOCK - 1] & (1 << metric));
632}
633void fib6_info_hw_flags_set(struct net *net, struct fib6_info *f6i,
634 bool offload, bool trap, bool offload_failed);
635
636#if IS_ENABLED(CONFIG_IPV6) && defined(CONFIG_BPF_SYSCALL)
637struct bpf_iter__ipv6_route {
638 __bpf_md_ptr(struct bpf_iter_meta *, meta);
639 __bpf_md_ptr(struct fib6_info *, rt);
640};
641#endif
642
643INDIRECT_CALLABLE_DECLARE(struct rt6_info *ip6_pol_route_output(struct net *net,
644 struct fib6_table *table,
645 struct flowi6 *fl6,
646 const struct sk_buff *skb,
647 int flags));
648INDIRECT_CALLABLE_DECLARE(struct rt6_info *ip6_pol_route_input(struct net *net,
649 struct fib6_table *table,
650 struct flowi6 *fl6,
651 const struct sk_buff *skb,
652 int flags));
653INDIRECT_CALLABLE_DECLARE(struct rt6_info *__ip6_route_redirect(struct net *net,
654 struct fib6_table *table,
655 struct flowi6 *fl6,
656 const struct sk_buff *skb,
657 int flags));
658INDIRECT_CALLABLE_DECLARE(struct rt6_info *ip6_pol_route_lookup(struct net *net,
659 struct fib6_table *table,
660 struct flowi6 *fl6,
661 const struct sk_buff *skb,
662 int flags));
663static inline struct rt6_info *pol_lookup_func(pol_lookup_t lookup,
664 struct net *net,
665 struct fib6_table *table,
666 struct flowi6 *fl6,
667 const struct sk_buff *skb,
668 int flags)
669{
670 return INDIRECT_CALL_4(lookup,
671 ip6_pol_route_output,
672 ip6_pol_route_input,
673 ip6_pol_route_lookup,
674 __ip6_route_redirect,
675 net, table, fl6, skb, flags);
676}
677
678#ifdef CONFIG_IPV6_MULTIPLE_TABLES
679static inline bool fib6_has_custom_rules(const struct net *net)
680{
681 return net->ipv6.fib6_has_custom_rules;
682}
683
684int fib6_rules_init(void);
685void fib6_rules_cleanup(void);
686bool fib6_rule_default(const struct fib_rule *rule);
687int fib6_rules_dump(struct net *net, struct notifier_block *nb,
688 struct netlink_ext_ack *extack);
689unsigned int fib6_rules_seq_read(const struct net *net);
690
691static inline bool fib6_rules_early_flow_dissect(struct net *net,
692 struct sk_buff *skb,
693 struct flowi6 *fl6,
694 struct flow_keys *flkeys)
695{
696 unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP;
697
698 if (!net->ipv6.fib6_rules_require_fldissect)
699 return false;
700
701 memset(flkeys, 0, sizeof(*flkeys));
702 __skb_flow_dissect(net, skb, &flow_keys_dissector,
703 flkeys, NULL, 0, 0, 0, flag);
704
705 fl6->fl6_sport = flkeys->ports.src;
706 fl6->fl6_dport = flkeys->ports.dst;
707 fl6->flowi6_proto = flkeys->basic.ip_proto;
708
709 return true;
710}
711#else
712static inline bool fib6_has_custom_rules(const struct net *net)
713{
714 return false;
715}
716static inline int fib6_rules_init(void)
717{
718 return 0;
719}
720static inline void fib6_rules_cleanup(void)
721{
722 return ;
723}
724static inline bool fib6_rule_default(const struct fib_rule *rule)
725{
726 return true;
727}
728static inline int fib6_rules_dump(struct net *net, struct notifier_block *nb,
729 struct netlink_ext_ack *extack)
730{
731 return 0;
732}
733static inline unsigned int fib6_rules_seq_read(const struct net *net)
734{
735 return 0;
736}
737static inline bool fib6_rules_early_flow_dissect(struct net *net,
738 struct sk_buff *skb,
739 struct flowi6 *fl6,
740 struct flow_keys *flkeys)
741{
742 return false;
743}
744#endif
745#endif