6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
16 #include <linux/workqueue.h>
18 #include <linux/pfkeyv2.h>
19 #include <linux/ipsec.h>
20 #include <linux/module.h>
21 #include <linux/cache.h>
22 #include <linux/audit.h>
23 #include <linux/uaccess.h>
24 #include <linux/ktime.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/kernel.h>
29 #include "xfrm_hash.h"
31 #define xfrm_state_deref_prot(table, net) \
32 rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
34 static void xfrm_state_gc_task(struct work_struct *work);
36 /* Each xfrm_state may be linked to two tables:
38 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
39 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
40 destination/tunnel endpoint. (output)
43 static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
44 static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation);
45 static struct kmem_cache *xfrm_state_cache __ro_after_init;
47 static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task);
48 static HLIST_HEAD(xfrm_state_gc_list);
50 static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
52 return refcount_inc_not_zero(&x->refcnt);
55 static inline unsigned int xfrm_dst_hash(struct net *net,
56 const xfrm_address_t *daddr,
57 const xfrm_address_t *saddr,
59 unsigned short family)
61 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
64 static inline unsigned int xfrm_src_hash(struct net *net,
65 const xfrm_address_t *daddr,
66 const xfrm_address_t *saddr,
67 unsigned short family)
69 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
72 static inline unsigned int
73 xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
74 __be32 spi, u8 proto, unsigned short family)
76 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
79 static void xfrm_hash_transfer(struct hlist_head *list,
80 struct hlist_head *ndsttable,
81 struct hlist_head *nsrctable,
82 struct hlist_head *nspitable,
83 unsigned int nhashmask)
85 struct hlist_node *tmp;
88 hlist_for_each_entry_safe(x, tmp, list, bydst) {
91 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
92 x->props.reqid, x->props.family,
94 hlist_add_head_rcu(&x->bydst, ndsttable + h);
96 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
99 hlist_add_head_rcu(&x->bysrc, nsrctable + h);
102 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
103 x->id.proto, x->props.family,
105 hlist_add_head_rcu(&x->byspi, nspitable + h);
110 static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
112 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
115 static void xfrm_hash_resize(struct work_struct *work)
117 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
118 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
119 unsigned long nsize, osize;
120 unsigned int nhashmask, ohashmask;
123 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
124 ndst = xfrm_hash_alloc(nsize);
127 nsrc = xfrm_hash_alloc(nsize);
129 xfrm_hash_free(ndst, nsize);
132 nspi = xfrm_hash_alloc(nsize);
134 xfrm_hash_free(ndst, nsize);
135 xfrm_hash_free(nsrc, nsize);
139 spin_lock_bh(&net->xfrm.xfrm_state_lock);
140 write_seqcount_begin(&xfrm_state_hash_generation);
142 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
143 odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
144 for (i = net->xfrm.state_hmask; i >= 0; i--)
145 xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask);
147 osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
148 ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
149 ohashmask = net->xfrm.state_hmask;
151 rcu_assign_pointer(net->xfrm.state_bydst, ndst);
152 rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
153 rcu_assign_pointer(net->xfrm.state_byspi, nspi);
154 net->xfrm.state_hmask = nhashmask;
156 write_seqcount_end(&xfrm_state_hash_generation);
157 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
159 osize = (ohashmask + 1) * sizeof(struct hlist_head);
163 xfrm_hash_free(odst, osize);
164 xfrm_hash_free(osrc, osize);
165 xfrm_hash_free(ospi, osize);
168 static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
169 static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
171 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
173 int __xfrm_state_delete(struct xfrm_state *x);
175 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
176 bool km_is_alive(const struct km_event *c);
177 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
179 static DEFINE_SPINLOCK(xfrm_type_lock);
180 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
182 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
183 const struct xfrm_type **typemap;
186 if (unlikely(afinfo == NULL))
187 return -EAFNOSUPPORT;
188 typemap = afinfo->type_map;
189 spin_lock_bh(&xfrm_type_lock);
191 if (likely(typemap[type->proto] == NULL))
192 typemap[type->proto] = type;
195 spin_unlock_bh(&xfrm_type_lock);
199 EXPORT_SYMBOL(xfrm_register_type);
201 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
203 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
204 const struct xfrm_type **typemap;
207 if (unlikely(afinfo == NULL))
208 return -EAFNOSUPPORT;
209 typemap = afinfo->type_map;
210 spin_lock_bh(&xfrm_type_lock);
212 if (unlikely(typemap[type->proto] != type))
215 typemap[type->proto] = NULL;
216 spin_unlock_bh(&xfrm_type_lock);
220 EXPORT_SYMBOL(xfrm_unregister_type);
222 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
224 struct xfrm_state_afinfo *afinfo;
225 const struct xfrm_type **typemap;
226 const struct xfrm_type *type;
227 int modload_attempted = 0;
230 afinfo = xfrm_state_get_afinfo(family);
231 if (unlikely(afinfo == NULL))
233 typemap = afinfo->type_map;
235 type = READ_ONCE(typemap[proto]);
236 if (unlikely(type && !try_module_get(type->owner)))
241 if (!type && !modload_attempted) {
242 request_module("xfrm-type-%d-%d", family, proto);
243 modload_attempted = 1;
250 static void xfrm_put_type(const struct xfrm_type *type)
252 module_put(type->owner);
255 static DEFINE_SPINLOCK(xfrm_type_offload_lock);
256 int xfrm_register_type_offload(const struct xfrm_type_offload *type,
257 unsigned short family)
259 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
260 const struct xfrm_type_offload **typemap;
263 if (unlikely(afinfo == NULL))
264 return -EAFNOSUPPORT;
265 typemap = afinfo->type_offload_map;
266 spin_lock_bh(&xfrm_type_offload_lock);
268 if (likely(typemap[type->proto] == NULL))
269 typemap[type->proto] = type;
272 spin_unlock_bh(&xfrm_type_offload_lock);
276 EXPORT_SYMBOL(xfrm_register_type_offload);
278 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
279 unsigned short family)
281 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
282 const struct xfrm_type_offload **typemap;
285 if (unlikely(afinfo == NULL))
286 return -EAFNOSUPPORT;
287 typemap = afinfo->type_offload_map;
288 spin_lock_bh(&xfrm_type_offload_lock);
290 if (unlikely(typemap[type->proto] != type))
293 typemap[type->proto] = NULL;
294 spin_unlock_bh(&xfrm_type_offload_lock);
298 EXPORT_SYMBOL(xfrm_unregister_type_offload);
300 static const struct xfrm_type_offload *
301 xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
303 struct xfrm_state_afinfo *afinfo;
304 const struct xfrm_type_offload **typemap;
305 const struct xfrm_type_offload *type;
308 afinfo = xfrm_state_get_afinfo(family);
309 if (unlikely(afinfo == NULL))
311 typemap = afinfo->type_offload_map;
313 type = typemap[proto];
314 if ((type && !try_module_get(type->owner)))
319 if (!type && try_load) {
320 request_module("xfrm-offload-%d-%d", family, proto);
328 static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
330 module_put(type->owner);
333 static DEFINE_SPINLOCK(xfrm_mode_lock);
334 int xfrm_register_mode(struct xfrm_mode *mode, int family)
336 struct xfrm_state_afinfo *afinfo;
337 struct xfrm_mode **modemap;
340 if (unlikely(mode->encap >= XFRM_MODE_MAX))
343 afinfo = xfrm_state_get_afinfo(family);
344 if (unlikely(afinfo == NULL))
345 return -EAFNOSUPPORT;
348 modemap = afinfo->mode_map;
349 spin_lock_bh(&xfrm_mode_lock);
350 if (modemap[mode->encap])
354 if (!try_module_get(afinfo->owner))
357 mode->afinfo = afinfo;
358 modemap[mode->encap] = mode;
362 spin_unlock_bh(&xfrm_mode_lock);
366 EXPORT_SYMBOL(xfrm_register_mode);
368 int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
370 struct xfrm_state_afinfo *afinfo;
371 struct xfrm_mode **modemap;
374 if (unlikely(mode->encap >= XFRM_MODE_MAX))
377 afinfo = xfrm_state_get_afinfo(family);
378 if (unlikely(afinfo == NULL))
379 return -EAFNOSUPPORT;
382 modemap = afinfo->mode_map;
383 spin_lock_bh(&xfrm_mode_lock);
384 if (likely(modemap[mode->encap] == mode)) {
385 modemap[mode->encap] = NULL;
386 module_put(mode->afinfo->owner);
390 spin_unlock_bh(&xfrm_mode_lock);
394 EXPORT_SYMBOL(xfrm_unregister_mode);
396 static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
398 struct xfrm_state_afinfo *afinfo;
399 struct xfrm_mode *mode;
400 int modload_attempted = 0;
402 if (unlikely(encap >= XFRM_MODE_MAX))
406 afinfo = xfrm_state_get_afinfo(family);
407 if (unlikely(afinfo == NULL))
410 mode = READ_ONCE(afinfo->mode_map[encap]);
411 if (unlikely(mode && !try_module_get(mode->owner)))
415 if (!mode && !modload_attempted) {
416 request_module("xfrm-mode-%d-%d", family, encap);
417 modload_attempted = 1;
424 static void xfrm_put_mode(struct xfrm_mode *mode)
426 module_put(mode->owner);
429 void xfrm_state_free(struct xfrm_state *x)
431 kmem_cache_free(xfrm_state_cache, x);
433 EXPORT_SYMBOL(xfrm_state_free);
435 static void xfrm_state_gc_destroy(struct xfrm_state *x)
437 tasklet_hrtimer_cancel(&x->mtimer);
438 del_timer_sync(&x->rtimer);
445 kfree(x->replay_esn);
446 kfree(x->preplay_esn);
448 xfrm_put_mode(x->inner_mode);
449 if (x->inner_mode_iaf)
450 xfrm_put_mode(x->inner_mode_iaf);
452 xfrm_put_mode(x->outer_mode);
454 xfrm_put_type_offload(x->type_offload);
456 x->type->destructor(x);
457 xfrm_put_type(x->type);
459 xfrm_dev_state_free(x);
460 security_xfrm_state_free(x);
464 static void xfrm_state_gc_task(struct work_struct *work)
466 struct xfrm_state *x;
467 struct hlist_node *tmp;
468 struct hlist_head gc_list;
470 spin_lock_bh(&xfrm_state_gc_lock);
471 hlist_move_list(&xfrm_state_gc_list, &gc_list);
472 spin_unlock_bh(&xfrm_state_gc_lock);
476 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
477 xfrm_state_gc_destroy(x);
480 static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
482 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
483 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
484 time64_t now = ktime_get_real_seconds();
485 time64_t next = TIME64_MAX;
490 if (x->km.state == XFRM_STATE_DEAD)
492 if (x->km.state == XFRM_STATE_EXPIRED)
494 if (x->lft.hard_add_expires_seconds) {
495 long tmo = x->lft.hard_add_expires_seconds +
496 x->curlft.add_time - now;
498 if (x->xflags & XFRM_SOFT_EXPIRE) {
499 /* enter hard expire without soft expire first?!
500 * setting a new date could trigger this.
501 * workaround: fix x->curflt.add_time by below:
503 x->curlft.add_time = now - x->saved_tmo - 1;
504 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
511 if (x->lft.hard_use_expires_seconds) {
512 long tmo = x->lft.hard_use_expires_seconds +
513 (x->curlft.use_time ? : now) - now;
521 if (x->lft.soft_add_expires_seconds) {
522 long tmo = x->lft.soft_add_expires_seconds +
523 x->curlft.add_time - now;
526 x->xflags &= ~XFRM_SOFT_EXPIRE;
527 } else if (tmo < next) {
529 x->xflags |= XFRM_SOFT_EXPIRE;
533 if (x->lft.soft_use_expires_seconds) {
534 long tmo = x->lft.soft_use_expires_seconds +
535 (x->curlft.use_time ? : now) - now;
544 km_state_expired(x, 0, 0);
546 if (next != TIME64_MAX) {
547 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
553 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
554 x->km.state = XFRM_STATE_EXPIRED;
556 err = __xfrm_state_delete(x);
558 km_state_expired(x, 1, 0);
560 xfrm_audit_state_delete(x, err ? 0 : 1, true);
563 spin_unlock(&x->lock);
564 return HRTIMER_NORESTART;
567 static void xfrm_replay_timer_handler(struct timer_list *t);
569 struct xfrm_state *xfrm_state_alloc(struct net *net)
571 struct xfrm_state *x;
573 x = kmem_cache_alloc(xfrm_state_cache, GFP_ATOMIC | __GFP_ZERO);
576 write_pnet(&x->xs_net, net);
577 refcount_set(&x->refcnt, 1);
578 atomic_set(&x->tunnel_users, 0);
579 INIT_LIST_HEAD(&x->km.all);
580 INIT_HLIST_NODE(&x->bydst);
581 INIT_HLIST_NODE(&x->bysrc);
582 INIT_HLIST_NODE(&x->byspi);
583 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
584 CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
585 timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
586 x->curlft.add_time = ktime_get_real_seconds();
587 x->lft.soft_byte_limit = XFRM_INF;
588 x->lft.soft_packet_limit = XFRM_INF;
589 x->lft.hard_byte_limit = XFRM_INF;
590 x->lft.hard_packet_limit = XFRM_INF;
591 x->replay_maxage = 0;
592 x->replay_maxdiff = 0;
593 x->inner_mode = NULL;
594 x->inner_mode_iaf = NULL;
595 spin_lock_init(&x->lock);
599 EXPORT_SYMBOL(xfrm_state_alloc);
601 void __xfrm_state_destroy(struct xfrm_state *x)
603 WARN_ON(x->km.state != XFRM_STATE_DEAD);
605 spin_lock_bh(&xfrm_state_gc_lock);
606 hlist_add_head(&x->gclist, &xfrm_state_gc_list);
607 spin_unlock_bh(&xfrm_state_gc_lock);
608 schedule_work(&xfrm_state_gc_work);
610 EXPORT_SYMBOL(__xfrm_state_destroy);
612 int __xfrm_state_delete(struct xfrm_state *x)
614 struct net *net = xs_net(x);
617 if (x->km.state != XFRM_STATE_DEAD) {
618 x->km.state = XFRM_STATE_DEAD;
619 spin_lock(&net->xfrm.xfrm_state_lock);
620 list_del(&x->km.all);
621 hlist_del_rcu(&x->bydst);
622 hlist_del_rcu(&x->bysrc);
624 hlist_del_rcu(&x->byspi);
625 net->xfrm.state_num--;
626 spin_unlock(&net->xfrm.xfrm_state_lock);
628 xfrm_dev_state_delete(x);
630 /* All xfrm_state objects are created by xfrm_state_alloc.
631 * The xfrm_state_alloc call gives a reference, and that
632 * is what we are dropping here.
640 EXPORT_SYMBOL(__xfrm_state_delete);
642 int xfrm_state_delete(struct xfrm_state *x)
646 spin_lock_bh(&x->lock);
647 err = __xfrm_state_delete(x);
648 spin_unlock_bh(&x->lock);
652 EXPORT_SYMBOL(xfrm_state_delete);
654 #ifdef CONFIG_SECURITY_NETWORK_XFRM
656 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
660 for (i = 0; i <= net->xfrm.state_hmask; i++) {
661 struct xfrm_state *x;
663 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
664 if (xfrm_id_proto_match(x->id.proto, proto) &&
665 (err = security_xfrm_state_delete(x)) != 0) {
666 xfrm_audit_state_delete(x, 0, task_valid);
676 xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
680 for (i = 0; i <= net->xfrm.state_hmask; i++) {
681 struct xfrm_state *x;
682 struct xfrm_state_offload *xso;
684 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
687 if (xso->dev == dev &&
688 (err = security_xfrm_state_delete(x)) != 0) {
689 xfrm_audit_state_delete(x, 0, task_valid);
699 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
705 xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
711 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid)
713 int i, err = 0, cnt = 0;
715 spin_lock_bh(&net->xfrm.xfrm_state_lock);
716 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
721 for (i = 0; i <= net->xfrm.state_hmask; i++) {
722 struct xfrm_state *x;
724 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
725 if (!xfrm_state_kern(x) &&
726 xfrm_id_proto_match(x->id.proto, proto)) {
728 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
730 err = xfrm_state_delete(x);
731 xfrm_audit_state_delete(x, err ? 0 : 1,
737 spin_lock_bh(&net->xfrm.xfrm_state_lock);
743 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
749 EXPORT_SYMBOL(xfrm_state_flush);
751 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
753 int i, err = 0, cnt = 0;
755 spin_lock_bh(&net->xfrm.xfrm_state_lock);
756 err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
761 for (i = 0; i <= net->xfrm.state_hmask; i++) {
762 struct xfrm_state *x;
763 struct xfrm_state_offload *xso;
765 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
768 if (!xfrm_state_kern(x) && xso->dev == dev) {
770 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
772 err = xfrm_state_delete(x);
773 xfrm_audit_state_delete(x, err ? 0 : 1,
779 spin_lock_bh(&net->xfrm.xfrm_state_lock);
788 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
791 EXPORT_SYMBOL(xfrm_dev_state_flush);
793 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
795 spin_lock_bh(&net->xfrm.xfrm_state_lock);
796 si->sadcnt = net->xfrm.state_num;
797 si->sadhcnt = net->xfrm.state_hmask + 1;
798 si->sadhmcnt = xfrm_state_hashmax;
799 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
801 EXPORT_SYMBOL(xfrm_sad_getinfo);
804 xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
805 const struct xfrm_tmpl *tmpl,
806 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
807 unsigned short family)
809 struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family);
814 afinfo->init_tempsel(&x->sel, fl);
816 if (family != tmpl->encap_family) {
817 afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family);
821 afinfo->init_temprop(x, tmpl, daddr, saddr);
824 static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
825 const xfrm_address_t *daddr,
826 __be32 spi, u8 proto,
827 unsigned short family)
829 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
830 struct xfrm_state *x;
832 hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) {
833 if (x->props.family != family ||
835 x->id.proto != proto ||
836 !xfrm_addr_equal(&x->id.daddr, daddr, family))
839 if ((mark & x->mark.m) != x->mark.v)
841 if (!xfrm_state_hold_rcu(x))
849 static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
850 const xfrm_address_t *daddr,
851 const xfrm_address_t *saddr,
852 u8 proto, unsigned short family)
854 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
855 struct xfrm_state *x;
857 hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) {
858 if (x->props.family != family ||
859 x->id.proto != proto ||
860 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
861 !xfrm_addr_equal(&x->props.saddr, saddr, family))
864 if ((mark & x->mark.m) != x->mark.v)
866 if (!xfrm_state_hold_rcu(x))
874 static inline struct xfrm_state *
875 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
877 struct net *net = xs_net(x);
878 u32 mark = x->mark.v & x->mark.m;
881 return __xfrm_state_lookup(net, mark, &x->id.daddr,
882 x->id.spi, x->id.proto, family);
884 return __xfrm_state_lookup_byaddr(net, mark,
887 x->id.proto, family);
890 static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
892 if (have_hash_collision &&
893 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
894 net->xfrm.state_num > net->xfrm.state_hmask)
895 schedule_work(&net->xfrm.state_hash_work);
898 static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
899 const struct flowi *fl, unsigned short family,
900 struct xfrm_state **best, int *acq_in_progress,
904 * 1. There is a valid state with matching selector. Done.
905 * 2. Valid state with inappropriate selector. Skip.
907 * Entering area of "sysdeps".
909 * 3. If state is not valid, selector is temporary, it selects
910 * only session which triggered previous resolution. Key
911 * manager will do something to install a state with proper
914 if (x->km.state == XFRM_STATE_VALID) {
915 if ((x->sel.family &&
916 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
917 !security_xfrm_state_pol_flow_match(x, pol, fl))
921 (*best)->km.dying > x->km.dying ||
922 ((*best)->km.dying == x->km.dying &&
923 (*best)->curlft.add_time < x->curlft.add_time))
925 } else if (x->km.state == XFRM_STATE_ACQ) {
926 *acq_in_progress = 1;
927 } else if (x->km.state == XFRM_STATE_ERROR ||
928 x->km.state == XFRM_STATE_EXPIRED) {
929 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
930 security_xfrm_state_pol_flow_match(x, pol, fl))
936 xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
937 const struct flowi *fl, struct xfrm_tmpl *tmpl,
938 struct xfrm_policy *pol, int *err,
939 unsigned short family, u32 if_id)
941 static xfrm_address_t saddr_wildcard = { };
942 struct net *net = xp_net(pol);
943 unsigned int h, h_wildcard;
944 struct xfrm_state *x, *x0, *to_put;
945 int acquire_in_progress = 0;
947 struct xfrm_state *best = NULL;
948 u32 mark = pol->mark.v & pol->mark.m;
949 unsigned short encap_family = tmpl->encap_family;
950 unsigned int sequence;
955 sequence = read_seqcount_begin(&xfrm_state_hash_generation);
958 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
959 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
960 if (x->props.family == encap_family &&
961 x->props.reqid == tmpl->reqid &&
962 (mark & x->mark.m) == x->mark.v &&
964 !(x->props.flags & XFRM_STATE_WILDRECV) &&
965 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
966 tmpl->mode == x->props.mode &&
967 tmpl->id.proto == x->id.proto &&
968 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
969 xfrm_state_look_at(pol, x, fl, encap_family,
970 &best, &acquire_in_progress, &error);
972 if (best || acquire_in_progress)
975 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
976 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) {
977 if (x->props.family == encap_family &&
978 x->props.reqid == tmpl->reqid &&
979 (mark & x->mark.m) == x->mark.v &&
981 !(x->props.flags & XFRM_STATE_WILDRECV) &&
982 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
983 tmpl->mode == x->props.mode &&
984 tmpl->id.proto == x->id.proto &&
985 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
986 xfrm_state_look_at(pol, x, fl, encap_family,
987 &best, &acquire_in_progress, &error);
992 if (!x && !error && !acquire_in_progress) {
994 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
995 tmpl->id.proto, encap_family)) != NULL) {
1002 /* If the KMs have no listeners (yet...), avoid allocating an SA
1003 * for each and every packet - garbage collection might not
1006 if (!km_is_alive(&c)) {
1011 x = xfrm_state_alloc(net);
1016 /* Initialize temporary state matching only
1017 * to current session. */
1018 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
1019 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1022 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
1024 x->km.state = XFRM_STATE_DEAD;
1030 if (km_query(x, tmpl, pol) == 0) {
1031 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1032 x->km.state = XFRM_STATE_ACQ;
1033 list_add(&x->km.all, &net->xfrm.state_all);
1034 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1035 h = xfrm_src_hash(net, daddr, saddr, encap_family);
1036 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1038 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
1039 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1041 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1042 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
1043 net->xfrm.state_num++;
1044 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1045 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1047 x->km.state = XFRM_STATE_DEAD;
1055 if (!xfrm_state_hold_rcu(x)) {
1060 *err = acquire_in_progress ? -EAGAIN : error;
1064 xfrm_state_put(to_put);
1066 if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) {
1078 xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1079 xfrm_address_t *daddr, xfrm_address_t *saddr,
1080 unsigned short family, u8 mode, u8 proto, u32 reqid)
1083 struct xfrm_state *rx = NULL, *x = NULL;
1085 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1086 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1087 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1088 if (x->props.family == family &&
1089 x->props.reqid == reqid &&
1090 (mark & x->mark.m) == x->mark.v &&
1091 x->if_id == if_id &&
1092 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1093 xfrm_state_addr_check(x, daddr, saddr, family) &&
1094 mode == x->props.mode &&
1095 proto == x->id.proto &&
1096 x->km.state == XFRM_STATE_VALID) {
1103 xfrm_state_hold(rx);
1104 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1109 EXPORT_SYMBOL(xfrm_stateonly_find);
1111 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1112 unsigned short family)
1114 struct xfrm_state *x;
1115 struct xfrm_state_walk *w;
1117 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1118 list_for_each_entry(w, &net->xfrm.state_all, all) {
1119 x = container_of(w, struct xfrm_state, km);
1120 if (x->props.family != family ||
1125 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1128 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1131 EXPORT_SYMBOL(xfrm_state_lookup_byspi);
1133 static void __xfrm_state_insert(struct xfrm_state *x)
1135 struct net *net = xs_net(x);
1138 list_add(&x->km.all, &net->xfrm.state_all);
1140 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
1141 x->props.reqid, x->props.family);
1142 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1144 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
1145 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1148 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
1151 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1154 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1155 if (x->replay_maxage)
1156 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
1158 net->xfrm.state_num++;
1160 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1163 /* net->xfrm.xfrm_state_lock is held */
1164 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
1166 struct net *net = xs_net(xnew);
1167 unsigned short family = xnew->props.family;
1168 u32 reqid = xnew->props.reqid;
1169 struct xfrm_state *x;
1171 u32 mark = xnew->mark.v & xnew->mark.m;
1172 u32 if_id = xnew->if_id;
1174 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
1175 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1176 if (x->props.family == family &&
1177 x->props.reqid == reqid &&
1178 x->if_id == if_id &&
1179 (mark & x->mark.m) == x->mark.v &&
1180 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
1181 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
1186 void xfrm_state_insert(struct xfrm_state *x)
1188 struct net *net = xs_net(x);
1190 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1191 __xfrm_state_bump_genids(x);
1192 __xfrm_state_insert(x);
1193 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1195 EXPORT_SYMBOL(xfrm_state_insert);
1197 /* net->xfrm.xfrm_state_lock is held */
1198 static struct xfrm_state *__find_acq_core(struct net *net,
1199 const struct xfrm_mark *m,
1200 unsigned short family, u8 mode,
1201 u32 reqid, u32 if_id, u8 proto,
1202 const xfrm_address_t *daddr,
1203 const xfrm_address_t *saddr,
1206 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1207 struct xfrm_state *x;
1208 u32 mark = m->v & m->m;
1210 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1211 if (x->props.reqid != reqid ||
1212 x->props.mode != mode ||
1213 x->props.family != family ||
1214 x->km.state != XFRM_STATE_ACQ ||
1216 x->id.proto != proto ||
1217 (mark & x->mark.m) != x->mark.v ||
1218 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1219 !xfrm_addr_equal(&x->props.saddr, saddr, family))
1229 x = xfrm_state_alloc(net);
1233 x->sel.daddr.a4 = daddr->a4;
1234 x->sel.saddr.a4 = saddr->a4;
1235 x->sel.prefixlen_d = 32;
1236 x->sel.prefixlen_s = 32;
1237 x->props.saddr.a4 = saddr->a4;
1238 x->id.daddr.a4 = daddr->a4;
1242 x->sel.daddr.in6 = daddr->in6;
1243 x->sel.saddr.in6 = saddr->in6;
1244 x->sel.prefixlen_d = 128;
1245 x->sel.prefixlen_s = 128;
1246 x->props.saddr.in6 = saddr->in6;
1247 x->id.daddr.in6 = daddr->in6;
1251 x->km.state = XFRM_STATE_ACQ;
1252 x->id.proto = proto;
1253 x->props.family = family;
1254 x->props.mode = mode;
1255 x->props.reqid = reqid;
1259 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1261 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
1262 list_add(&x->km.all, &net->xfrm.state_all);
1263 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1264 h = xfrm_src_hash(net, daddr, saddr, family);
1265 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1267 net->xfrm.state_num++;
1269 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1275 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1277 int xfrm_state_add(struct xfrm_state *x)
1279 struct net *net = xs_net(x);
1280 struct xfrm_state *x1, *to_put;
1283 u32 mark = x->mark.v & x->mark.m;
1284 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1286 family = x->props.family;
1290 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1292 x1 = __xfrm_state_locate(x, use_spi, family);
1300 if (use_spi && x->km.seq) {
1301 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
1302 if (x1 && ((x1->id.proto != x->id.proto) ||
1303 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
1310 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1311 x->props.reqid, x->if_id, x->id.proto,
1312 &x->id.daddr, &x->props.saddr, 0);
1314 __xfrm_state_bump_genids(x);
1315 __xfrm_state_insert(x);
1319 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1322 xfrm_state_delete(x1);
1327 xfrm_state_put(to_put);
1331 EXPORT_SYMBOL(xfrm_state_add);
1333 #ifdef CONFIG_XFRM_MIGRATE
1334 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
1335 struct xfrm_encap_tmpl *encap)
1337 struct net *net = xs_net(orig);
1338 struct xfrm_state *x = xfrm_state_alloc(net);
1342 memcpy(&x->id, &orig->id, sizeof(x->id));
1343 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1344 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1345 x->props.mode = orig->props.mode;
1346 x->props.replay_window = orig->props.replay_window;
1347 x->props.reqid = orig->props.reqid;
1348 x->props.family = orig->props.family;
1349 x->props.saddr = orig->props.saddr;
1352 x->aalg = xfrm_algo_auth_clone(orig->aalg);
1356 x->props.aalgo = orig->props.aalgo;
1359 x->aead = xfrm_algo_aead_clone(orig->aead);
1360 x->geniv = orig->geniv;
1365 x->ealg = xfrm_algo_clone(orig->ealg);
1369 x->props.ealgo = orig->props.ealgo;
1372 x->calg = xfrm_algo_clone(orig->calg);
1376 x->props.calgo = orig->props.calgo;
1378 if (encap || orig->encap) {
1380 x->encap = kmemdup(encap, sizeof(*x->encap),
1383 x->encap = kmemdup(orig->encap, sizeof(*x->encap),
1391 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1397 if (orig->replay_esn) {
1398 if (xfrm_replay_clone(x, orig))
1402 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1404 if (xfrm_init_state(x) < 0)
1407 x->props.flags = orig->props.flags;
1408 x->props.extra_flags = orig->props.extra_flags;
1410 x->if_id = orig->if_id;
1411 x->tfcpad = orig->tfcpad;
1412 x->replay_maxdiff = orig->replay_maxdiff;
1413 x->replay_maxage = orig->replay_maxage;
1414 x->curlft.add_time = orig->curlft.add_time;
1415 x->km.state = orig->km.state;
1416 x->km.seq = orig->km.seq;
1417 x->replay = orig->replay;
1418 x->preplay = orig->preplay;
1428 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
1431 struct xfrm_state *x = NULL;
1433 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1436 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
1437 m->reqid, m->old_family);
1438 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1439 if (x->props.mode != m->mode ||
1440 x->id.proto != m->proto)
1442 if (m->reqid && x->props.reqid != m->reqid)
1444 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1446 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1453 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
1455 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
1456 if (x->props.mode != m->mode ||
1457 x->id.proto != m->proto)
1459 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1461 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1469 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1473 EXPORT_SYMBOL(xfrm_migrate_state_find);
1475 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1476 struct xfrm_migrate *m,
1477 struct xfrm_encap_tmpl *encap)
1479 struct xfrm_state *xc;
1481 xc = xfrm_state_clone(x, encap);
1485 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1486 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1489 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
1490 /* a care is needed when the destination address of the
1491 state is to be updated as it is a part of triplet */
1492 xfrm_state_insert(xc);
1494 if (xfrm_state_add(xc) < 0)
1503 EXPORT_SYMBOL(xfrm_state_migrate);
1506 int xfrm_state_update(struct xfrm_state *x)
1508 struct xfrm_state *x1, *to_put;
1510 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1511 struct net *net = xs_net(x);
1515 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1516 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1522 if (xfrm_state_kern(x1)) {
1528 if (x1->km.state == XFRM_STATE_ACQ) {
1529 __xfrm_state_insert(x);
1535 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1538 xfrm_state_put(to_put);
1544 xfrm_state_delete(x1);
1550 spin_lock_bh(&x1->lock);
1551 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1552 if (x->encap && x1->encap &&
1553 x->encap->encap_type == x1->encap->encap_type)
1554 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1555 else if (x->encap || x1->encap)
1558 if (x->coaddr && x1->coaddr) {
1559 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1561 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1562 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1563 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1566 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1567 if (x1->curlft.use_time)
1568 xfrm_state_check_expire(x1);
1570 if (x->props.smark.m || x->props.smark.v || x->if_id) {
1571 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1573 if (x->props.smark.m || x->props.smark.v)
1574 x1->props.smark = x->props.smark;
1577 x1->if_id = x->if_id;
1579 __xfrm_state_bump_genids(x1);
1580 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1584 x->km.state = XFRM_STATE_DEAD;
1585 __xfrm_state_put(x);
1589 spin_unlock_bh(&x1->lock);
1595 EXPORT_SYMBOL(xfrm_state_update);
1597 int xfrm_state_check_expire(struct xfrm_state *x)
1599 if (!x->curlft.use_time)
1600 x->curlft.use_time = ktime_get_real_seconds();
1602 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1603 x->curlft.packets >= x->lft.hard_packet_limit) {
1604 x->km.state = XFRM_STATE_EXPIRED;
1605 tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL);
1610 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1611 x->curlft.packets >= x->lft.soft_packet_limit)) {
1613 km_state_expired(x, 0, 0);
1617 EXPORT_SYMBOL(xfrm_state_check_expire);
1620 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
1621 u8 proto, unsigned short family)
1623 struct xfrm_state *x;
1626 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1630 EXPORT_SYMBOL(xfrm_state_lookup);
1633 xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1634 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1635 u8 proto, unsigned short family)
1637 struct xfrm_state *x;
1639 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1640 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
1641 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1644 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1647 xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1648 u32 if_id, u8 proto, const xfrm_address_t *daddr,
1649 const xfrm_address_t *saddr, int create, unsigned short family)
1651 struct xfrm_state *x;
1653 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1654 x = __find_acq_core(net, mark, family, mode, reqid, if_id, proto, daddr, saddr, create);
1655 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1659 EXPORT_SYMBOL(xfrm_find_acq);
1661 #ifdef CONFIG_XFRM_SUB_POLICY
1663 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1664 unsigned short family, struct net *net)
1668 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1670 return -EAFNOSUPPORT;
1672 spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/
1673 if (afinfo->tmpl_sort)
1674 err = afinfo->tmpl_sort(dst, src, n);
1676 for (i = 0; i < n; i++)
1678 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1682 EXPORT_SYMBOL(xfrm_tmpl_sort);
1685 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1686 unsigned short family)
1690 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1691 struct net *net = xs_net(*src);
1694 return -EAFNOSUPPORT;
1696 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1697 if (afinfo->state_sort)
1698 err = afinfo->state_sort(dst, src, n);
1700 for (i = 0; i < n; i++)
1702 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1706 EXPORT_SYMBOL(xfrm_state_sort);
1709 /* Silly enough, but I'm lazy to build resolution list */
1711 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1715 for (i = 0; i <= net->xfrm.state_hmask; i++) {
1716 struct xfrm_state *x;
1718 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1719 if (x->km.seq == seq &&
1720 (mark & x->mark.m) == x->mark.v &&
1721 x->km.state == XFRM_STATE_ACQ) {
1730 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1732 struct xfrm_state *x;
1734 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1735 x = __xfrm_find_acq_byseq(net, mark, seq);
1736 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1739 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1741 u32 xfrm_get_acqseq(void)
1744 static atomic_t acqseq;
1747 res = atomic_inc_return(&acqseq);
1752 EXPORT_SYMBOL(xfrm_get_acqseq);
1754 int verify_spi_info(u8 proto, u32 min, u32 max)
1762 /* IPCOMP spi is 16-bits. */
1776 EXPORT_SYMBOL(verify_spi_info);
1778 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1780 struct net *net = xs_net(x);
1782 struct xfrm_state *x0;
1784 __be32 minspi = htonl(low);
1785 __be32 maxspi = htonl(high);
1786 u32 mark = x->mark.v & x->mark.m;
1788 spin_lock_bh(&x->lock);
1789 if (x->km.state == XFRM_STATE_DEAD)
1798 if (minspi == maxspi) {
1799 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1807 for (h = 0; h < high-low+1; h++) {
1808 spi = low + prandom_u32()%(high-low+1);
1809 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1811 x->id.spi = htonl(spi);
1818 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1819 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1820 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1821 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1827 spin_unlock_bh(&x->lock);
1831 EXPORT_SYMBOL(xfrm_alloc_spi);
1833 static bool __xfrm_state_filter_match(struct xfrm_state *x,
1834 struct xfrm_address_filter *filter)
1837 if ((filter->family == AF_INET ||
1838 filter->family == AF_INET6) &&
1839 x->props.family != filter->family)
1842 return addr_match(&x->props.saddr, &filter->saddr,
1844 addr_match(&x->id.daddr, &filter->daddr,
1850 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1851 int (*func)(struct xfrm_state *, int, void*),
1854 struct xfrm_state *state;
1855 struct xfrm_state_walk *x;
1858 if (walk->seq != 0 && list_empty(&walk->all))
1861 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1862 if (list_empty(&walk->all))
1863 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
1865 x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
1866 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
1867 if (x->state == XFRM_STATE_DEAD)
1869 state = container_of(x, struct xfrm_state, km);
1870 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
1872 if (!__xfrm_state_filter_match(state, walk->filter))
1874 err = func(state, walk->seq, data);
1876 list_move_tail(&walk->all, &x->all);
1881 if (walk->seq == 0) {
1885 list_del_init(&walk->all);
1887 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1890 EXPORT_SYMBOL(xfrm_state_walk);
1892 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1893 struct xfrm_address_filter *filter)
1895 INIT_LIST_HEAD(&walk->all);
1896 walk->proto = proto;
1897 walk->state = XFRM_STATE_DEAD;
1899 walk->filter = filter;
1901 EXPORT_SYMBOL(xfrm_state_walk_init);
1903 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
1905 kfree(walk->filter);
1907 if (list_empty(&walk->all))
1910 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1911 list_del(&walk->all);
1912 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1914 EXPORT_SYMBOL(xfrm_state_walk_done);
1916 static void xfrm_replay_timer_handler(struct timer_list *t)
1918 struct xfrm_state *x = from_timer(x, t, rtimer);
1920 spin_lock(&x->lock);
1922 if (x->km.state == XFRM_STATE_VALID) {
1923 if (xfrm_aevent_is_on(xs_net(x)))
1924 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
1926 x->xflags |= XFRM_TIME_DEFER;
1929 spin_unlock(&x->lock);
1932 static LIST_HEAD(xfrm_km_list);
1934 void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1936 struct xfrm_mgr *km;
1939 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1940 if (km->notify_policy)
1941 km->notify_policy(xp, dir, c);
1945 void km_state_notify(struct xfrm_state *x, const struct km_event *c)
1947 struct xfrm_mgr *km;
1949 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1955 EXPORT_SYMBOL(km_policy_notify);
1956 EXPORT_SYMBOL(km_state_notify);
1958 void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
1964 c.event = XFRM_MSG_EXPIRE;
1965 km_state_notify(x, &c);
1968 EXPORT_SYMBOL(km_state_expired);
1970 * We send to all registered managers regardless of failure
1971 * We are happy with one success
1973 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1975 int err = -EINVAL, acqret;
1976 struct xfrm_mgr *km;
1979 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1980 acqret = km->acquire(x, t, pol);
1987 EXPORT_SYMBOL(km_query);
1989 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1992 struct xfrm_mgr *km;
1995 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1996 if (km->new_mapping)
1997 err = km->new_mapping(x, ipaddr, sport);
2004 EXPORT_SYMBOL(km_new_mapping);
2006 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
2012 c.event = XFRM_MSG_POLEXPIRE;
2013 km_policy_notify(pol, dir, &c);
2015 EXPORT_SYMBOL(km_policy_expired);
2017 #ifdef CONFIG_XFRM_MIGRATE
2018 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2019 const struct xfrm_migrate *m, int num_migrate,
2020 const struct xfrm_kmaddress *k,
2021 const struct xfrm_encap_tmpl *encap)
2025 struct xfrm_mgr *km;
2028 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2030 ret = km->migrate(sel, dir, type, m, num_migrate, k,
2039 EXPORT_SYMBOL(km_migrate);
2042 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
2046 struct xfrm_mgr *km;
2049 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2051 ret = km->report(net, proto, sel, addr);
2059 EXPORT_SYMBOL(km_report);
2061 bool km_is_alive(const struct km_event *c)
2063 struct xfrm_mgr *km;
2064 bool is_alive = false;
2067 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2068 if (km->is_alive && km->is_alive(c)) {
2077 EXPORT_SYMBOL(km_is_alive);
2079 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
2083 struct xfrm_mgr *km;
2084 struct xfrm_policy *pol = NULL;
2086 if (in_compat_syscall())
2089 if (!optval && !optlen) {
2090 xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
2091 xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
2096 if (optlen <= 0 || optlen > PAGE_SIZE)
2099 data = memdup_user(optval, optlen);
2101 return PTR_ERR(data);
2105 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2106 pol = km->compile_policy(sk, optname, data,
2114 xfrm_sk_policy_insert(sk, err, pol);
2123 EXPORT_SYMBOL(xfrm_user_policy);
2125 static DEFINE_SPINLOCK(xfrm_km_lock);
2127 int xfrm_register_km(struct xfrm_mgr *km)
2129 spin_lock_bh(&xfrm_km_lock);
2130 list_add_tail_rcu(&km->list, &xfrm_km_list);
2131 spin_unlock_bh(&xfrm_km_lock);
2134 EXPORT_SYMBOL(xfrm_register_km);
2136 int xfrm_unregister_km(struct xfrm_mgr *km)
2138 spin_lock_bh(&xfrm_km_lock);
2139 list_del_rcu(&km->list);
2140 spin_unlock_bh(&xfrm_km_lock);
2144 EXPORT_SYMBOL(xfrm_unregister_km);
2146 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
2150 if (WARN_ON(afinfo->family >= NPROTO))
2151 return -EAFNOSUPPORT;
2153 spin_lock_bh(&xfrm_state_afinfo_lock);
2154 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
2157 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
2158 spin_unlock_bh(&xfrm_state_afinfo_lock);
2161 EXPORT_SYMBOL(xfrm_state_register_afinfo);
2163 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
2165 int err = 0, family = afinfo->family;
2167 if (WARN_ON(family >= NPROTO))
2168 return -EAFNOSUPPORT;
2170 spin_lock_bh(&xfrm_state_afinfo_lock);
2171 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
2172 if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
2175 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
2177 spin_unlock_bh(&xfrm_state_afinfo_lock);
2181 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
2183 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
2185 if (unlikely(family >= NPROTO))
2188 return rcu_dereference(xfrm_state_afinfo[family]);
2191 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
2193 struct xfrm_state_afinfo *afinfo;
2194 if (unlikely(family >= NPROTO))
2197 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
2198 if (unlikely(!afinfo))
2203 void xfrm_flush_gc(void)
2205 flush_work(&xfrm_state_gc_work);
2207 EXPORT_SYMBOL(xfrm_flush_gc);
2209 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
2210 void xfrm_state_delete_tunnel(struct xfrm_state *x)
2213 struct xfrm_state *t = x->tunnel;
2215 if (atomic_read(&t->tunnel_users) == 2)
2216 xfrm_state_delete(t);
2217 atomic_dec(&t->tunnel_users);
2222 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
2224 int xfrm_state_mtu(struct xfrm_state *x, int mtu)
2226 const struct xfrm_type *type = READ_ONCE(x->type);
2228 if (x->km.state == XFRM_STATE_VALID &&
2229 type && type->get_mtu)
2230 return type->get_mtu(x, mtu);
2232 return mtu - x->props.header_len;
2235 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
2237 struct xfrm_state_afinfo *afinfo;
2238 struct xfrm_mode *inner_mode;
2239 int family = x->props.family;
2242 err = -EAFNOSUPPORT;
2243 afinfo = xfrm_state_get_afinfo(family);
2248 if (afinfo->init_flags)
2249 err = afinfo->init_flags(x);
2256 err = -EPROTONOSUPPORT;
2258 if (x->sel.family != AF_UNSPEC) {
2259 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2260 if (inner_mode == NULL)
2263 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2264 family != x->sel.family) {
2265 xfrm_put_mode(inner_mode);
2269 x->inner_mode = inner_mode;
2271 struct xfrm_mode *inner_mode_iaf;
2272 int iafamily = AF_INET;
2274 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
2275 if (inner_mode == NULL)
2278 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2279 xfrm_put_mode(inner_mode);
2282 x->inner_mode = inner_mode;
2284 if (x->props.family == AF_INET)
2285 iafamily = AF_INET6;
2287 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2288 if (inner_mode_iaf) {
2289 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2290 x->inner_mode_iaf = inner_mode_iaf;
2292 xfrm_put_mode(inner_mode_iaf);
2296 x->type = xfrm_get_type(x->id.proto, family);
2297 if (x->type == NULL)
2300 x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);
2302 err = x->type->init_state(x);
2306 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2307 if (x->outer_mode == NULL) {
2308 err = -EPROTONOSUPPORT;
2313 err = xfrm_init_replay(x);
2322 EXPORT_SYMBOL(__xfrm_init_state);
2324 int xfrm_init_state(struct xfrm_state *x)
2328 err = __xfrm_init_state(x, true, false);
2330 x->km.state = XFRM_STATE_VALID;
2335 EXPORT_SYMBOL(xfrm_init_state);
2337 int __net_init xfrm_state_init(struct net *net)
2341 if (net_eq(net, &init_net))
2342 xfrm_state_cache = KMEM_CACHE(xfrm_state,
2343 SLAB_HWCACHE_ALIGN | SLAB_PANIC);
2345 INIT_LIST_HEAD(&net->xfrm.state_all);
2347 sz = sizeof(struct hlist_head) * 8;
2349 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2350 if (!net->xfrm.state_bydst)
2352 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2353 if (!net->xfrm.state_bysrc)
2355 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2356 if (!net->xfrm.state_byspi)
2358 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2360 net->xfrm.state_num = 0;
2361 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
2362 spin_lock_init(&net->xfrm.xfrm_state_lock);
2366 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2368 xfrm_hash_free(net->xfrm.state_bydst, sz);
2373 void xfrm_state_fini(struct net *net)
2377 flush_work(&net->xfrm.state_hash_work);
2378 xfrm_state_flush(net, IPSEC_PROTO_ANY, false);
2379 flush_work(&xfrm_state_gc_work);
2381 WARN_ON(!list_empty(&net->xfrm.state_all));
2383 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
2384 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2385 xfrm_hash_free(net->xfrm.state_byspi, sz);
2386 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2387 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2388 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2389 xfrm_hash_free(net->xfrm.state_bydst, sz);
2392 #ifdef CONFIG_AUDITSYSCALL
2393 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2394 struct audit_buffer *audit_buf)
2396 struct xfrm_sec_ctx *ctx = x->security;
2397 u32 spi = ntohl(x->id.spi);
2400 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2401 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2403 switch (x->props.family) {
2405 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2406 &x->props.saddr.a4, &x->id.daddr.a4);
2409 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
2410 x->props.saddr.a6, x->id.daddr.a6);
2414 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2417 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2418 struct audit_buffer *audit_buf)
2420 const struct iphdr *iph4;
2421 const struct ipv6hdr *iph6;
2426 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2427 &iph4->saddr, &iph4->daddr);
2430 iph6 = ipv6_hdr(skb);
2431 audit_log_format(audit_buf,
2432 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2433 &iph6->saddr, &iph6->daddr,
2434 iph6->flow_lbl[0] & 0x0f,
2441 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
2443 struct audit_buffer *audit_buf;
2445 audit_buf = xfrm_audit_start("SAD-add");
2446 if (audit_buf == NULL)
2448 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2449 xfrm_audit_helper_sainfo(x, audit_buf);
2450 audit_log_format(audit_buf, " res=%u", result);
2451 audit_log_end(audit_buf);
2453 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2455 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
2457 struct audit_buffer *audit_buf;
2459 audit_buf = xfrm_audit_start("SAD-delete");
2460 if (audit_buf == NULL)
2462 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2463 xfrm_audit_helper_sainfo(x, audit_buf);
2464 audit_log_format(audit_buf, " res=%u", result);
2465 audit_log_end(audit_buf);
2467 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2469 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2470 struct sk_buff *skb)
2472 struct audit_buffer *audit_buf;
2475 audit_buf = xfrm_audit_start("SA-replay-overflow");
2476 if (audit_buf == NULL)
2478 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2479 /* don't record the sequence number because it's inherent in this kind
2480 * of audit message */
2481 spi = ntohl(x->id.spi);
2482 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2483 audit_log_end(audit_buf);
2485 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2487 void xfrm_audit_state_replay(struct xfrm_state *x,
2488 struct sk_buff *skb, __be32 net_seq)
2490 struct audit_buffer *audit_buf;
2493 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2494 if (audit_buf == NULL)
2496 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2497 spi = ntohl(x->id.spi);
2498 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2499 spi, spi, ntohl(net_seq));
2500 audit_log_end(audit_buf);
2502 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
2504 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2506 struct audit_buffer *audit_buf;
2508 audit_buf = xfrm_audit_start("SA-notfound");
2509 if (audit_buf == NULL)
2511 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2512 audit_log_end(audit_buf);
2514 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2516 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2517 __be32 net_spi, __be32 net_seq)
2519 struct audit_buffer *audit_buf;
2522 audit_buf = xfrm_audit_start("SA-notfound");
2523 if (audit_buf == NULL)
2525 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2526 spi = ntohl(net_spi);
2527 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2528 spi, spi, ntohl(net_seq));
2529 audit_log_end(audit_buf);
2531 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2533 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2534 struct sk_buff *skb, u8 proto)
2536 struct audit_buffer *audit_buf;
2540 audit_buf = xfrm_audit_start("SA-icv-failure");
2541 if (audit_buf == NULL)
2543 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2544 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2545 u32 spi = ntohl(net_spi);
2546 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2547 spi, spi, ntohl(net_seq));
2549 audit_log_end(audit_buf);
2551 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2552 #endif /* CONFIG_AUDITSYSCALL */