1 // SPDX-License-Identifier: GPL-2.0-only
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
10 * YOSHIFUJI Hideaki @USAGI
11 * Split up af-specific functions
12 * Derek Atkins <derek@ihtfp.com>
13 * Add UDP Encapsulation
17 #include <linux/workqueue.h>
19 #include <linux/pfkeyv2.h>
20 #include <linux/ipsec.h>
21 #include <linux/module.h>
22 #include <linux/cache.h>
23 #include <linux/audit.h>
24 #include <linux/uaccess.h>
25 #include <linux/ktime.h>
26 #include <linux/slab.h>
27 #include <linux/interrupt.h>
28 #include <linux/kernel.h>
30 #include <crypto/aead.h>
32 #include "xfrm_hash.h"
34 #define xfrm_state_deref_prot(table, net) \
35 rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
37 static void xfrm_state_gc_task(struct work_struct *work);
39 /* Each xfrm_state may be linked to two tables:
41 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
42 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
43 destination/tunnel endpoint. (output)
46 static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
47 static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation);
48 static struct kmem_cache *xfrm_state_cache __ro_after_init;
50 static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task);
51 static HLIST_HEAD(xfrm_state_gc_list);
53 static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
55 return refcount_inc_not_zero(&x->refcnt);
58 static inline unsigned int xfrm_dst_hash(struct net *net,
59 const xfrm_address_t *daddr,
60 const xfrm_address_t *saddr,
62 unsigned short family)
64 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
67 static inline unsigned int xfrm_src_hash(struct net *net,
68 const xfrm_address_t *daddr,
69 const xfrm_address_t *saddr,
70 unsigned short family)
72 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
75 static inline unsigned int
76 xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
77 __be32 spi, u8 proto, unsigned short family)
79 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
82 static void xfrm_hash_transfer(struct hlist_head *list,
83 struct hlist_head *ndsttable,
84 struct hlist_head *nsrctable,
85 struct hlist_head *nspitable,
86 unsigned int nhashmask)
88 struct hlist_node *tmp;
91 hlist_for_each_entry_safe(x, tmp, list, bydst) {
94 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
95 x->props.reqid, x->props.family,
97 hlist_add_head_rcu(&x->bydst, ndsttable + h);
99 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
102 hlist_add_head_rcu(&x->bysrc, nsrctable + h);
105 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
106 x->id.proto, x->props.family,
108 hlist_add_head_rcu(&x->byspi, nspitable + h);
113 static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
115 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
118 static void xfrm_hash_resize(struct work_struct *work)
120 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
121 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
122 unsigned long nsize, osize;
123 unsigned int nhashmask, ohashmask;
126 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
127 ndst = xfrm_hash_alloc(nsize);
130 nsrc = xfrm_hash_alloc(nsize);
132 xfrm_hash_free(ndst, nsize);
135 nspi = xfrm_hash_alloc(nsize);
137 xfrm_hash_free(ndst, nsize);
138 xfrm_hash_free(nsrc, nsize);
142 spin_lock_bh(&net->xfrm.xfrm_state_lock);
143 write_seqcount_begin(&xfrm_state_hash_generation);
145 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
146 odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
147 for (i = net->xfrm.state_hmask; i >= 0; i--)
148 xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask);
150 osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
151 ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
152 ohashmask = net->xfrm.state_hmask;
154 rcu_assign_pointer(net->xfrm.state_bydst, ndst);
155 rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
156 rcu_assign_pointer(net->xfrm.state_byspi, nspi);
157 net->xfrm.state_hmask = nhashmask;
159 write_seqcount_end(&xfrm_state_hash_generation);
160 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
162 osize = (ohashmask + 1) * sizeof(struct hlist_head);
166 xfrm_hash_free(odst, osize);
167 xfrm_hash_free(osrc, osize);
168 xfrm_hash_free(ospi, osize);
171 static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
172 static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
174 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
176 int __xfrm_state_delete(struct xfrm_state *x);
178 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
179 static bool km_is_alive(const struct km_event *c);
180 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
182 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
184 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
188 return -EAFNOSUPPORT;
190 #define X(afi, T, name) do { \
191 WARN_ON((afi)->type_ ## name); \
192 (afi)->type_ ## name = (T); \
195 switch (type->proto) {
197 X(afinfo, type, comp);
203 X(afinfo, type, esp);
206 X(afinfo, type, ipip);
208 case IPPROTO_DSTOPTS:
209 X(afinfo, type, dstopts);
211 case IPPROTO_ROUTING:
212 X(afinfo, type, routing);
215 X(afinfo, type, ipip6);
219 err = -EPROTONOSUPPORT;
226 EXPORT_SYMBOL(xfrm_register_type);
228 void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
230 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
232 if (unlikely(afinfo == NULL))
235 #define X(afi, T, name) do { \
236 WARN_ON((afi)->type_ ## name != (T)); \
237 (afi)->type_ ## name = NULL; \
240 switch (type->proto) {
242 X(afinfo, type, comp);
248 X(afinfo, type, esp);
251 X(afinfo, type, ipip);
253 case IPPROTO_DSTOPTS:
254 X(afinfo, type, dstopts);
256 case IPPROTO_ROUTING:
257 X(afinfo, type, routing);
260 X(afinfo, type, ipip6);
269 EXPORT_SYMBOL(xfrm_unregister_type);
271 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
273 const struct xfrm_type *type = NULL;
274 struct xfrm_state_afinfo *afinfo;
275 int modload_attempted = 0;
278 afinfo = xfrm_state_get_afinfo(family);
279 if (unlikely(afinfo == NULL))
284 type = afinfo->type_comp;
287 type = afinfo->type_ah;
290 type = afinfo->type_esp;
293 type = afinfo->type_ipip;
295 case IPPROTO_DSTOPTS:
296 type = afinfo->type_dstopts;
298 case IPPROTO_ROUTING:
299 type = afinfo->type_routing;
302 type = afinfo->type_ipip6;
308 if (unlikely(type && !try_module_get(type->owner)))
313 if (!type && !modload_attempted) {
314 request_module("xfrm-type-%d-%d", family, proto);
315 modload_attempted = 1;
322 static void xfrm_put_type(const struct xfrm_type *type)
324 module_put(type->owner);
327 int xfrm_register_type_offload(const struct xfrm_type_offload *type,
328 unsigned short family)
330 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
333 if (unlikely(afinfo == NULL))
334 return -EAFNOSUPPORT;
336 switch (type->proto) {
338 WARN_ON(afinfo->type_offload_esp);
339 afinfo->type_offload_esp = type;
343 err = -EPROTONOSUPPORT;
350 EXPORT_SYMBOL(xfrm_register_type_offload);
352 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
353 unsigned short family)
355 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
357 if (unlikely(afinfo == NULL))
360 switch (type->proto) {
362 WARN_ON(afinfo->type_offload_esp != type);
363 afinfo->type_offload_esp = NULL;
371 EXPORT_SYMBOL(xfrm_unregister_type_offload);
373 static const struct xfrm_type_offload *
374 xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
376 const struct xfrm_type_offload *type = NULL;
377 struct xfrm_state_afinfo *afinfo;
380 afinfo = xfrm_state_get_afinfo(family);
381 if (unlikely(afinfo == NULL))
386 type = afinfo->type_offload_esp;
392 if ((type && !try_module_get(type->owner)))
397 if (!type && try_load) {
398 request_module("xfrm-offload-%d-%d", family, proto);
406 static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
408 module_put(type->owner);
411 static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
413 .encap = XFRM_MODE_BEET,
414 .flags = XFRM_MODE_FLAG_TUNNEL,
417 [XFRM_MODE_TRANSPORT] = {
418 .encap = XFRM_MODE_TRANSPORT,
421 [XFRM_MODE_TUNNEL] = {
422 .encap = XFRM_MODE_TUNNEL,
423 .flags = XFRM_MODE_FLAG_TUNNEL,
428 static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
430 .encap = XFRM_MODE_BEET,
431 .flags = XFRM_MODE_FLAG_TUNNEL,
434 [XFRM_MODE_ROUTEOPTIMIZATION] = {
435 .encap = XFRM_MODE_ROUTEOPTIMIZATION,
438 [XFRM_MODE_TRANSPORT] = {
439 .encap = XFRM_MODE_TRANSPORT,
442 [XFRM_MODE_TUNNEL] = {
443 .encap = XFRM_MODE_TUNNEL,
444 .flags = XFRM_MODE_FLAG_TUNNEL,
449 static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
451 const struct xfrm_mode *mode;
453 if (unlikely(encap >= XFRM_MODE_MAX))
458 mode = &xfrm4_mode_map[encap];
459 if (mode->family == family)
463 mode = &xfrm6_mode_map[encap];
464 if (mode->family == family)
474 void xfrm_state_free(struct xfrm_state *x)
476 kmem_cache_free(xfrm_state_cache, x);
478 EXPORT_SYMBOL(xfrm_state_free);
480 static void ___xfrm_state_destroy(struct xfrm_state *x)
482 hrtimer_cancel(&x->mtimer);
483 del_timer_sync(&x->rtimer);
490 kfree(x->replay_esn);
491 kfree(x->preplay_esn);
493 xfrm_put_type_offload(x->type_offload);
495 x->type->destructor(x);
496 xfrm_put_type(x->type);
498 xfrm_dev_state_free(x);
499 security_xfrm_state_free(x);
503 static void xfrm_state_gc_task(struct work_struct *work)
505 struct xfrm_state *x;
506 struct hlist_node *tmp;
507 struct hlist_head gc_list;
509 spin_lock_bh(&xfrm_state_gc_lock);
510 hlist_move_list(&xfrm_state_gc_list, &gc_list);
511 spin_unlock_bh(&xfrm_state_gc_lock);
515 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
516 ___xfrm_state_destroy(x);
519 static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
521 struct xfrm_state *x = container_of(me, struct xfrm_state, mtimer);
522 enum hrtimer_restart ret = HRTIMER_NORESTART;
523 time64_t now = ktime_get_real_seconds();
524 time64_t next = TIME64_MAX;
529 if (x->km.state == XFRM_STATE_DEAD)
531 if (x->km.state == XFRM_STATE_EXPIRED)
533 if (x->lft.hard_add_expires_seconds) {
534 long tmo = x->lft.hard_add_expires_seconds +
535 x->curlft.add_time - now;
537 if (x->xflags & XFRM_SOFT_EXPIRE) {
538 /* enter hard expire without soft expire first?!
539 * setting a new date could trigger this.
540 * workaround: fix x->curflt.add_time by below:
542 x->curlft.add_time = now - x->saved_tmo - 1;
543 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
550 if (x->lft.hard_use_expires_seconds) {
551 long tmo = x->lft.hard_use_expires_seconds +
552 (x->curlft.use_time ? : now) - now;
560 if (x->lft.soft_add_expires_seconds) {
561 long tmo = x->lft.soft_add_expires_seconds +
562 x->curlft.add_time - now;
565 x->xflags &= ~XFRM_SOFT_EXPIRE;
566 } else if (tmo < next) {
568 x->xflags |= XFRM_SOFT_EXPIRE;
572 if (x->lft.soft_use_expires_seconds) {
573 long tmo = x->lft.soft_use_expires_seconds +
574 (x->curlft.use_time ? : now) - now;
583 km_state_expired(x, 0, 0);
585 if (next != TIME64_MAX) {
586 hrtimer_forward_now(&x->mtimer, ktime_set(next, 0));
587 ret = HRTIMER_RESTART;
593 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
594 x->km.state = XFRM_STATE_EXPIRED;
596 err = __xfrm_state_delete(x);
598 km_state_expired(x, 1, 0);
600 xfrm_audit_state_delete(x, err ? 0 : 1, true);
603 spin_unlock(&x->lock);
607 static void xfrm_replay_timer_handler(struct timer_list *t);
609 struct xfrm_state *xfrm_state_alloc(struct net *net)
611 struct xfrm_state *x;
613 x = kmem_cache_alloc(xfrm_state_cache, GFP_ATOMIC | __GFP_ZERO);
616 write_pnet(&x->xs_net, net);
617 refcount_set(&x->refcnt, 1);
618 atomic_set(&x->tunnel_users, 0);
619 INIT_LIST_HEAD(&x->km.all);
620 INIT_HLIST_NODE(&x->bydst);
621 INIT_HLIST_NODE(&x->bysrc);
622 INIT_HLIST_NODE(&x->byspi);
623 hrtimer_init(&x->mtimer, CLOCK_BOOTTIME, HRTIMER_MODE_ABS_SOFT);
624 x->mtimer.function = xfrm_timer_handler;
625 timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
626 x->curlft.add_time = ktime_get_real_seconds();
627 x->lft.soft_byte_limit = XFRM_INF;
628 x->lft.soft_packet_limit = XFRM_INF;
629 x->lft.hard_byte_limit = XFRM_INF;
630 x->lft.hard_packet_limit = XFRM_INF;
631 x->replay_maxage = 0;
632 x->replay_maxdiff = 0;
633 spin_lock_init(&x->lock);
637 EXPORT_SYMBOL(xfrm_state_alloc);
639 void __xfrm_state_destroy(struct xfrm_state *x, bool sync)
641 WARN_ON(x->km.state != XFRM_STATE_DEAD);
645 ___xfrm_state_destroy(x);
647 spin_lock_bh(&xfrm_state_gc_lock);
648 hlist_add_head(&x->gclist, &xfrm_state_gc_list);
649 spin_unlock_bh(&xfrm_state_gc_lock);
650 schedule_work(&xfrm_state_gc_work);
653 EXPORT_SYMBOL(__xfrm_state_destroy);
655 int __xfrm_state_delete(struct xfrm_state *x)
657 struct net *net = xs_net(x);
660 if (x->km.state != XFRM_STATE_DEAD) {
661 x->km.state = XFRM_STATE_DEAD;
662 spin_lock(&net->xfrm.xfrm_state_lock);
663 list_del(&x->km.all);
664 hlist_del_rcu(&x->bydst);
665 hlist_del_rcu(&x->bysrc);
667 hlist_del_rcu(&x->byspi);
668 net->xfrm.state_num--;
669 spin_unlock(&net->xfrm.xfrm_state_lock);
671 xfrm_dev_state_delete(x);
673 /* All xfrm_state objects are created by xfrm_state_alloc.
674 * The xfrm_state_alloc call gives a reference, and that
675 * is what we are dropping here.
683 EXPORT_SYMBOL(__xfrm_state_delete);
685 int xfrm_state_delete(struct xfrm_state *x)
689 spin_lock_bh(&x->lock);
690 err = __xfrm_state_delete(x);
691 spin_unlock_bh(&x->lock);
695 EXPORT_SYMBOL(xfrm_state_delete);
697 #ifdef CONFIG_SECURITY_NETWORK_XFRM
699 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
703 for (i = 0; i <= net->xfrm.state_hmask; i++) {
704 struct xfrm_state *x;
706 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
707 if (xfrm_id_proto_match(x->id.proto, proto) &&
708 (err = security_xfrm_state_delete(x)) != 0) {
709 xfrm_audit_state_delete(x, 0, task_valid);
719 xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
723 for (i = 0; i <= net->xfrm.state_hmask; i++) {
724 struct xfrm_state *x;
725 struct xfrm_state_offload *xso;
727 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
730 if (xso->dev == dev &&
731 (err = security_xfrm_state_delete(x)) != 0) {
732 xfrm_audit_state_delete(x, 0, task_valid);
742 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
748 xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
754 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync)
756 int i, err = 0, cnt = 0;
758 spin_lock_bh(&net->xfrm.xfrm_state_lock);
759 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
764 for (i = 0; i <= net->xfrm.state_hmask; i++) {
765 struct xfrm_state *x;
767 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
768 if (!xfrm_state_kern(x) &&
769 xfrm_id_proto_match(x->id.proto, proto)) {
771 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
773 err = xfrm_state_delete(x);
774 xfrm_audit_state_delete(x, err ? 0 : 1,
777 xfrm_state_put_sync(x);
783 spin_lock_bh(&net->xfrm.xfrm_state_lock);
789 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
795 EXPORT_SYMBOL(xfrm_state_flush);
797 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
799 int i, err = 0, cnt = 0;
801 spin_lock_bh(&net->xfrm.xfrm_state_lock);
802 err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
807 for (i = 0; i <= net->xfrm.state_hmask; i++) {
808 struct xfrm_state *x;
809 struct xfrm_state_offload *xso;
811 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
814 if (!xfrm_state_kern(x) && xso->dev == dev) {
816 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
818 err = xfrm_state_delete(x);
819 xfrm_audit_state_delete(x, err ? 0 : 1,
825 spin_lock_bh(&net->xfrm.xfrm_state_lock);
834 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
837 EXPORT_SYMBOL(xfrm_dev_state_flush);
839 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
841 spin_lock_bh(&net->xfrm.xfrm_state_lock);
842 si->sadcnt = net->xfrm.state_num;
843 si->sadhcnt = net->xfrm.state_hmask + 1;
844 si->sadhmcnt = xfrm_state_hashmax;
845 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
847 EXPORT_SYMBOL(xfrm_sad_getinfo);
850 __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
852 const struct flowi4 *fl4 = &fl->u.ip4;
854 sel->daddr.a4 = fl4->daddr;
855 sel->saddr.a4 = fl4->saddr;
856 sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
857 sel->dport_mask = htons(0xffff);
858 sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
859 sel->sport_mask = htons(0xffff);
860 sel->family = AF_INET;
861 sel->prefixlen_d = 32;
862 sel->prefixlen_s = 32;
863 sel->proto = fl4->flowi4_proto;
864 sel->ifindex = fl4->flowi4_oif;
868 __xfrm6_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
870 const struct flowi6 *fl6 = &fl->u.ip6;
872 /* Initialize temporary selector matching only to current session. */
873 *(struct in6_addr *)&sel->daddr = fl6->daddr;
874 *(struct in6_addr *)&sel->saddr = fl6->saddr;
875 sel->dport = xfrm_flowi_dport(fl, &fl6->uli);
876 sel->dport_mask = htons(0xffff);
877 sel->sport = xfrm_flowi_sport(fl, &fl6->uli);
878 sel->sport_mask = htons(0xffff);
879 sel->family = AF_INET6;
880 sel->prefixlen_d = 128;
881 sel->prefixlen_s = 128;
882 sel->proto = fl6->flowi6_proto;
883 sel->ifindex = fl6->flowi6_oif;
887 xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
888 const struct xfrm_tmpl *tmpl,
889 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
890 unsigned short family)
894 __xfrm4_init_tempsel(&x->sel, fl);
897 __xfrm6_init_tempsel(&x->sel, fl);
903 switch (tmpl->encap_family) {
905 if (x->id.daddr.a4 == 0)
906 x->id.daddr.a4 = daddr->a4;
907 x->props.saddr = tmpl->saddr;
908 if (x->props.saddr.a4 == 0)
909 x->props.saddr.a4 = saddr->a4;
912 if (ipv6_addr_any((struct in6_addr *)&x->id.daddr))
913 memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
914 memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
915 if (ipv6_addr_any((struct in6_addr *)&x->props.saddr))
916 memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
920 x->props.mode = tmpl->mode;
921 x->props.reqid = tmpl->reqid;
922 x->props.family = tmpl->encap_family;
925 static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
926 const xfrm_address_t *daddr,
927 __be32 spi, u8 proto,
928 unsigned short family)
930 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
931 struct xfrm_state *x;
933 hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) {
934 if (x->props.family != family ||
936 x->id.proto != proto ||
937 !xfrm_addr_equal(&x->id.daddr, daddr, family))
940 if ((mark & x->mark.m) != x->mark.v)
942 if (!xfrm_state_hold_rcu(x))
950 static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
951 const xfrm_address_t *daddr,
952 const xfrm_address_t *saddr,
953 u8 proto, unsigned short family)
955 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
956 struct xfrm_state *x;
958 hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) {
959 if (x->props.family != family ||
960 x->id.proto != proto ||
961 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
962 !xfrm_addr_equal(&x->props.saddr, saddr, family))
965 if ((mark & x->mark.m) != x->mark.v)
967 if (!xfrm_state_hold_rcu(x))
975 static inline struct xfrm_state *
976 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
978 struct net *net = xs_net(x);
979 u32 mark = x->mark.v & x->mark.m;
982 return __xfrm_state_lookup(net, mark, &x->id.daddr,
983 x->id.spi, x->id.proto, family);
985 return __xfrm_state_lookup_byaddr(net, mark,
988 x->id.proto, family);
991 static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
993 if (have_hash_collision &&
994 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
995 net->xfrm.state_num > net->xfrm.state_hmask)
996 schedule_work(&net->xfrm.state_hash_work);
999 static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
1000 const struct flowi *fl, unsigned short family,
1001 struct xfrm_state **best, int *acq_in_progress,
1004 /* Resolution logic:
1005 * 1. There is a valid state with matching selector. Done.
1006 * 2. Valid state with inappropriate selector. Skip.
1008 * Entering area of "sysdeps".
1010 * 3. If state is not valid, selector is temporary, it selects
1011 * only session which triggered previous resolution. Key
1012 * manager will do something to install a state with proper
1015 if (x->km.state == XFRM_STATE_VALID) {
1016 if ((x->sel.family &&
1017 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
1018 !security_xfrm_state_pol_flow_match(x, pol, fl))
1022 (*best)->km.dying > x->km.dying ||
1023 ((*best)->km.dying == x->km.dying &&
1024 (*best)->curlft.add_time < x->curlft.add_time))
1026 } else if (x->km.state == XFRM_STATE_ACQ) {
1027 *acq_in_progress = 1;
1028 } else if (x->km.state == XFRM_STATE_ERROR ||
1029 x->km.state == XFRM_STATE_EXPIRED) {
1030 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
1031 security_xfrm_state_pol_flow_match(x, pol, fl))
1037 xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1038 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1039 struct xfrm_policy *pol, int *err,
1040 unsigned short family, u32 if_id)
1042 static xfrm_address_t saddr_wildcard = { };
1043 struct net *net = xp_net(pol);
1044 unsigned int h, h_wildcard;
1045 struct xfrm_state *x, *x0, *to_put;
1046 int acquire_in_progress = 0;
1048 struct xfrm_state *best = NULL;
1049 u32 mark = pol->mark.v & pol->mark.m;
1050 unsigned short encap_family = tmpl->encap_family;
1051 unsigned int sequence;
1056 sequence = read_seqcount_begin(&xfrm_state_hash_generation);
1059 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
1060 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
1061 if (x->props.family == encap_family &&
1062 x->props.reqid == tmpl->reqid &&
1063 (mark & x->mark.m) == x->mark.v &&
1064 x->if_id == if_id &&
1065 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1066 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1067 tmpl->mode == x->props.mode &&
1068 tmpl->id.proto == x->id.proto &&
1069 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1070 xfrm_state_look_at(pol, x, fl, encap_family,
1071 &best, &acquire_in_progress, &error);
1073 if (best || acquire_in_progress)
1076 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
1077 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) {
1078 if (x->props.family == encap_family &&
1079 x->props.reqid == tmpl->reqid &&
1080 (mark & x->mark.m) == x->mark.v &&
1081 x->if_id == if_id &&
1082 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1083 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
1084 tmpl->mode == x->props.mode &&
1085 tmpl->id.proto == x->id.proto &&
1086 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1087 xfrm_state_look_at(pol, x, fl, encap_family,
1088 &best, &acquire_in_progress, &error);
1093 if (!x && !error && !acquire_in_progress) {
1095 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
1096 tmpl->id.proto, encap_family)) != NULL) {
1103 /* If the KMs have no listeners (yet...), avoid allocating an SA
1104 * for each and every packet - garbage collection might not
1107 if (!km_is_alive(&c)) {
1112 x = xfrm_state_alloc(net);
1117 /* Initialize temporary state matching only
1118 * to current session. */
1119 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
1120 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1123 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
1125 x->km.state = XFRM_STATE_DEAD;
1131 if (km_query(x, tmpl, pol) == 0) {
1132 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1133 x->km.state = XFRM_STATE_ACQ;
1134 list_add(&x->km.all, &net->xfrm.state_all);
1135 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1136 h = xfrm_src_hash(net, daddr, saddr, encap_family);
1137 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1139 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
1140 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1142 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1143 hrtimer_start(&x->mtimer,
1144 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1145 HRTIMER_MODE_REL_SOFT);
1146 net->xfrm.state_num++;
1147 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1148 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1150 x->km.state = XFRM_STATE_DEAD;
1158 if (!xfrm_state_hold_rcu(x)) {
1163 *err = acquire_in_progress ? -EAGAIN : error;
1167 xfrm_state_put(to_put);
1169 if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) {
1181 xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1182 xfrm_address_t *daddr, xfrm_address_t *saddr,
1183 unsigned short family, u8 mode, u8 proto, u32 reqid)
1186 struct xfrm_state *rx = NULL, *x = NULL;
1188 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1189 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1190 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1191 if (x->props.family == family &&
1192 x->props.reqid == reqid &&
1193 (mark & x->mark.m) == x->mark.v &&
1194 x->if_id == if_id &&
1195 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1196 xfrm_state_addr_check(x, daddr, saddr, family) &&
1197 mode == x->props.mode &&
1198 proto == x->id.proto &&
1199 x->km.state == XFRM_STATE_VALID) {
1206 xfrm_state_hold(rx);
1207 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1212 EXPORT_SYMBOL(xfrm_stateonly_find);
1214 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1215 unsigned short family)
1217 struct xfrm_state *x;
1218 struct xfrm_state_walk *w;
1220 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1221 list_for_each_entry(w, &net->xfrm.state_all, all) {
1222 x = container_of(w, struct xfrm_state, km);
1223 if (x->props.family != family ||
1228 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1231 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1234 EXPORT_SYMBOL(xfrm_state_lookup_byspi);
1236 static void __xfrm_state_insert(struct xfrm_state *x)
1238 struct net *net = xs_net(x);
1241 list_add(&x->km.all, &net->xfrm.state_all);
1243 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
1244 x->props.reqid, x->props.family);
1245 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1247 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
1248 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1251 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
1254 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1257 hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL_SOFT);
1258 if (x->replay_maxage)
1259 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
1261 net->xfrm.state_num++;
1263 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1266 /* net->xfrm.xfrm_state_lock is held */
1267 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
1269 struct net *net = xs_net(xnew);
1270 unsigned short family = xnew->props.family;
1271 u32 reqid = xnew->props.reqid;
1272 struct xfrm_state *x;
1274 u32 mark = xnew->mark.v & xnew->mark.m;
1275 u32 if_id = xnew->if_id;
1277 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
1278 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1279 if (x->props.family == family &&
1280 x->props.reqid == reqid &&
1281 x->if_id == if_id &&
1282 (mark & x->mark.m) == x->mark.v &&
1283 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
1284 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
1289 void xfrm_state_insert(struct xfrm_state *x)
1291 struct net *net = xs_net(x);
1293 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1294 __xfrm_state_bump_genids(x);
1295 __xfrm_state_insert(x);
1296 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1298 EXPORT_SYMBOL(xfrm_state_insert);
1300 /* net->xfrm.xfrm_state_lock is held */
1301 static struct xfrm_state *__find_acq_core(struct net *net,
1302 const struct xfrm_mark *m,
1303 unsigned short family, u8 mode,
1304 u32 reqid, u32 if_id, u8 proto,
1305 const xfrm_address_t *daddr,
1306 const xfrm_address_t *saddr,
1309 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1310 struct xfrm_state *x;
1311 u32 mark = m->v & m->m;
1313 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1314 if (x->props.reqid != reqid ||
1315 x->props.mode != mode ||
1316 x->props.family != family ||
1317 x->km.state != XFRM_STATE_ACQ ||
1319 x->id.proto != proto ||
1320 (mark & x->mark.m) != x->mark.v ||
1321 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1322 !xfrm_addr_equal(&x->props.saddr, saddr, family))
1332 x = xfrm_state_alloc(net);
1336 x->sel.daddr.a4 = daddr->a4;
1337 x->sel.saddr.a4 = saddr->a4;
1338 x->sel.prefixlen_d = 32;
1339 x->sel.prefixlen_s = 32;
1340 x->props.saddr.a4 = saddr->a4;
1341 x->id.daddr.a4 = daddr->a4;
1345 x->sel.daddr.in6 = daddr->in6;
1346 x->sel.saddr.in6 = saddr->in6;
1347 x->sel.prefixlen_d = 128;
1348 x->sel.prefixlen_s = 128;
1349 x->props.saddr.in6 = saddr->in6;
1350 x->id.daddr.in6 = daddr->in6;
1354 x->km.state = XFRM_STATE_ACQ;
1355 x->id.proto = proto;
1356 x->props.family = family;
1357 x->props.mode = mode;
1358 x->props.reqid = reqid;
1362 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1364 hrtimer_start(&x->mtimer,
1365 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1366 HRTIMER_MODE_REL_SOFT);
1367 list_add(&x->km.all, &net->xfrm.state_all);
1368 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1369 h = xfrm_src_hash(net, daddr, saddr, family);
1370 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1372 net->xfrm.state_num++;
1374 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1380 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1382 int xfrm_state_add(struct xfrm_state *x)
1384 struct net *net = xs_net(x);
1385 struct xfrm_state *x1, *to_put;
1388 u32 mark = x->mark.v & x->mark.m;
1389 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1391 family = x->props.family;
1395 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1397 x1 = __xfrm_state_locate(x, use_spi, family);
1405 if (use_spi && x->km.seq) {
1406 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
1407 if (x1 && ((x1->id.proto != x->id.proto) ||
1408 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
1415 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1416 x->props.reqid, x->if_id, x->id.proto,
1417 &x->id.daddr, &x->props.saddr, 0);
1419 __xfrm_state_bump_genids(x);
1420 __xfrm_state_insert(x);
1424 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1427 xfrm_state_delete(x1);
1432 xfrm_state_put(to_put);
1436 EXPORT_SYMBOL(xfrm_state_add);
1438 #ifdef CONFIG_XFRM_MIGRATE
1439 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
1440 struct xfrm_encap_tmpl *encap)
1442 struct net *net = xs_net(orig);
1443 struct xfrm_state *x = xfrm_state_alloc(net);
1447 memcpy(&x->id, &orig->id, sizeof(x->id));
1448 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1449 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1450 x->props.mode = orig->props.mode;
1451 x->props.replay_window = orig->props.replay_window;
1452 x->props.reqid = orig->props.reqid;
1453 x->props.family = orig->props.family;
1454 x->props.saddr = orig->props.saddr;
1457 x->aalg = xfrm_algo_auth_clone(orig->aalg);
1461 x->props.aalgo = orig->props.aalgo;
1464 x->aead = xfrm_algo_aead_clone(orig->aead);
1465 x->geniv = orig->geniv;
1470 x->ealg = xfrm_algo_clone(orig->ealg);
1474 x->props.ealgo = orig->props.ealgo;
1477 x->calg = xfrm_algo_clone(orig->calg);
1481 x->props.calgo = orig->props.calgo;
1483 if (encap || orig->encap) {
1485 x->encap = kmemdup(encap, sizeof(*x->encap),
1488 x->encap = kmemdup(orig->encap, sizeof(*x->encap),
1496 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1502 if (orig->replay_esn) {
1503 if (xfrm_replay_clone(x, orig))
1507 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1509 if (xfrm_init_state(x) < 0)
1512 x->props.flags = orig->props.flags;
1513 x->props.extra_flags = orig->props.extra_flags;
1515 x->if_id = orig->if_id;
1516 x->tfcpad = orig->tfcpad;
1517 x->replay_maxdiff = orig->replay_maxdiff;
1518 x->replay_maxage = orig->replay_maxage;
1519 x->curlft.add_time = orig->curlft.add_time;
1520 x->km.state = orig->km.state;
1521 x->km.seq = orig->km.seq;
1522 x->replay = orig->replay;
1523 x->preplay = orig->preplay;
1533 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
1536 struct xfrm_state *x = NULL;
1538 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1541 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
1542 m->reqid, m->old_family);
1543 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1544 if (x->props.mode != m->mode ||
1545 x->id.proto != m->proto)
1547 if (m->reqid && x->props.reqid != m->reqid)
1549 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1551 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1558 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
1560 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
1561 if (x->props.mode != m->mode ||
1562 x->id.proto != m->proto)
1564 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1566 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1574 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1578 EXPORT_SYMBOL(xfrm_migrate_state_find);
1580 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1581 struct xfrm_migrate *m,
1582 struct xfrm_encap_tmpl *encap)
1584 struct xfrm_state *xc;
1586 xc = xfrm_state_clone(x, encap);
1590 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1591 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1594 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
1595 /* a care is needed when the destination address of the
1596 state is to be updated as it is a part of triplet */
1597 xfrm_state_insert(xc);
1599 if (xfrm_state_add(xc) < 0)
1608 EXPORT_SYMBOL(xfrm_state_migrate);
1611 int xfrm_state_update(struct xfrm_state *x)
1613 struct xfrm_state *x1, *to_put;
1615 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1616 struct net *net = xs_net(x);
1620 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1621 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1627 if (xfrm_state_kern(x1)) {
1633 if (x1->km.state == XFRM_STATE_ACQ) {
1634 __xfrm_state_insert(x);
1640 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1643 xfrm_state_put(to_put);
1649 xfrm_state_delete(x1);
1655 spin_lock_bh(&x1->lock);
1656 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1657 if (x->encap && x1->encap &&
1658 x->encap->encap_type == x1->encap->encap_type)
1659 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1660 else if (x->encap || x1->encap)
1663 if (x->coaddr && x1->coaddr) {
1664 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1666 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1667 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1668 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1671 hrtimer_start(&x1->mtimer, ktime_set(1, 0),
1672 HRTIMER_MODE_REL_SOFT);
1673 if (x1->curlft.use_time)
1674 xfrm_state_check_expire(x1);
1676 if (x->props.smark.m || x->props.smark.v || x->if_id) {
1677 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1679 if (x->props.smark.m || x->props.smark.v)
1680 x1->props.smark = x->props.smark;
1683 x1->if_id = x->if_id;
1685 __xfrm_state_bump_genids(x1);
1686 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1690 x->km.state = XFRM_STATE_DEAD;
1691 __xfrm_state_put(x);
1695 spin_unlock_bh(&x1->lock);
1701 EXPORT_SYMBOL(xfrm_state_update);
1703 int xfrm_state_check_expire(struct xfrm_state *x)
1705 if (!x->curlft.use_time)
1706 x->curlft.use_time = ktime_get_real_seconds();
1708 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1709 x->curlft.packets >= x->lft.hard_packet_limit) {
1710 x->km.state = XFRM_STATE_EXPIRED;
1711 hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL_SOFT);
1716 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1717 x->curlft.packets >= x->lft.soft_packet_limit)) {
1719 km_state_expired(x, 0, 0);
1723 EXPORT_SYMBOL(xfrm_state_check_expire);
1726 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
1727 u8 proto, unsigned short family)
1729 struct xfrm_state *x;
1732 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1736 EXPORT_SYMBOL(xfrm_state_lookup);
1739 xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1740 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1741 u8 proto, unsigned short family)
1743 struct xfrm_state *x;
1745 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1746 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
1747 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1750 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1753 xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1754 u32 if_id, u8 proto, const xfrm_address_t *daddr,
1755 const xfrm_address_t *saddr, int create, unsigned short family)
1757 struct xfrm_state *x;
1759 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1760 x = __find_acq_core(net, mark, family, mode, reqid, if_id, proto, daddr, saddr, create);
1761 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1765 EXPORT_SYMBOL(xfrm_find_acq);
1767 #ifdef CONFIG_XFRM_SUB_POLICY
1768 #if IS_ENABLED(CONFIG_IPV6)
1769 /* distribution counting sort function for xfrm_state and xfrm_tmpl */
1771 __xfrm6_sort(void **dst, void **src, int n,
1772 int (*cmp)(const void *p), int maxclass)
1774 int count[XFRM_MAX_DEPTH] = { };
1775 int class[XFRM_MAX_DEPTH];
1778 for (i = 0; i < n; i++) {
1779 int c = cmp(src[i]);
1785 for (i = 2; i < maxclass; i++)
1786 count[i] += count[i - 1];
1788 for (i = 0; i < n; i++) {
1789 dst[count[class[i] - 1]++] = src[i];
1794 /* Rule for xfrm_state:
1796 * rule 1: select IPsec transport except AH
1797 * rule 2: select MIPv6 RO or inbound trigger
1798 * rule 3: select IPsec transport AH
1799 * rule 4: select IPsec tunnel
1802 static int __xfrm6_state_sort_cmp(const void *p)
1804 const struct xfrm_state *v = p;
1806 switch (v->props.mode) {
1807 case XFRM_MODE_TRANSPORT:
1808 if (v->id.proto != IPPROTO_AH)
1812 #if IS_ENABLED(CONFIG_IPV6_MIP6)
1813 case XFRM_MODE_ROUTEOPTIMIZATION:
1814 case XFRM_MODE_IN_TRIGGER:
1817 case XFRM_MODE_TUNNEL:
1818 case XFRM_MODE_BEET:
1824 /* Rule for xfrm_tmpl:
1826 * rule 1: select IPsec transport
1827 * rule 2: select MIPv6 RO or inbound trigger
1828 * rule 3: select IPsec tunnel
1831 static int __xfrm6_tmpl_sort_cmp(const void *p)
1833 const struct xfrm_tmpl *v = p;
1836 case XFRM_MODE_TRANSPORT:
1838 #if IS_ENABLED(CONFIG_IPV6_MIP6)
1839 case XFRM_MODE_ROUTEOPTIMIZATION:
1840 case XFRM_MODE_IN_TRIGGER:
1843 case XFRM_MODE_TUNNEL:
1844 case XFRM_MODE_BEET:
1850 static inline int __xfrm6_state_sort_cmp(const void *p) { return 5; }
1851 static inline int __xfrm6_tmpl_sort_cmp(const void *p) { return 4; }
1854 __xfrm6_sort(void **dst, void **src, int n,
1855 int (*cmp)(const void *p), int maxclass)
1859 for (i = 0; i < n; i++)
1862 #endif /* CONFIG_IPV6 */
1865 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1866 unsigned short family)
1870 if (family == AF_INET6)
1871 __xfrm6_sort((void **)dst, (void **)src, n,
1872 __xfrm6_tmpl_sort_cmp, 5);
1874 for (i = 0; i < n; i++)
1879 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1880 unsigned short family)
1884 if (family == AF_INET6)
1885 __xfrm6_sort((void **)dst, (void **)src, n,
1886 __xfrm6_state_sort_cmp, 6);
1888 for (i = 0; i < n; i++)
1893 /* Silly enough, but I'm lazy to build resolution list */
1895 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1899 for (i = 0; i <= net->xfrm.state_hmask; i++) {
1900 struct xfrm_state *x;
1902 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1903 if (x->km.seq == seq &&
1904 (mark & x->mark.m) == x->mark.v &&
1905 x->km.state == XFRM_STATE_ACQ) {
1914 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1916 struct xfrm_state *x;
1918 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1919 x = __xfrm_find_acq_byseq(net, mark, seq);
1920 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1923 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1925 u32 xfrm_get_acqseq(void)
1928 static atomic_t acqseq;
1931 res = atomic_inc_return(&acqseq);
1936 EXPORT_SYMBOL(xfrm_get_acqseq);
1938 int verify_spi_info(u8 proto, u32 min, u32 max)
1946 /* IPCOMP spi is 16-bits. */
1960 EXPORT_SYMBOL(verify_spi_info);
1962 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1964 struct net *net = xs_net(x);
1966 struct xfrm_state *x0;
1968 __be32 minspi = htonl(low);
1969 __be32 maxspi = htonl(high);
1970 u32 mark = x->mark.v & x->mark.m;
1972 spin_lock_bh(&x->lock);
1973 if (x->km.state == XFRM_STATE_DEAD)
1982 if (minspi == maxspi) {
1983 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1991 for (h = 0; h < high-low+1; h++) {
1992 spi = low + prandom_u32()%(high-low+1);
1993 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1995 x->id.spi = htonl(spi);
2002 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2003 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
2004 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
2005 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2011 spin_unlock_bh(&x->lock);
2015 EXPORT_SYMBOL(xfrm_alloc_spi);
2017 static bool __xfrm_state_filter_match(struct xfrm_state *x,
2018 struct xfrm_address_filter *filter)
2021 if ((filter->family == AF_INET ||
2022 filter->family == AF_INET6) &&
2023 x->props.family != filter->family)
2026 return addr_match(&x->props.saddr, &filter->saddr,
2028 addr_match(&x->id.daddr, &filter->daddr,
2034 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
2035 int (*func)(struct xfrm_state *, int, void*),
2038 struct xfrm_state *state;
2039 struct xfrm_state_walk *x;
2042 if (walk->seq != 0 && list_empty(&walk->all))
2045 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2046 if (list_empty(&walk->all))
2047 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
2049 x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
2050 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
2051 if (x->state == XFRM_STATE_DEAD)
2053 state = container_of(x, struct xfrm_state, km);
2054 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
2056 if (!__xfrm_state_filter_match(state, walk->filter))
2058 err = func(state, walk->seq, data);
2060 list_move_tail(&walk->all, &x->all);
2065 if (walk->seq == 0) {
2069 list_del_init(&walk->all);
2071 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2074 EXPORT_SYMBOL(xfrm_state_walk);
2076 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
2077 struct xfrm_address_filter *filter)
2079 INIT_LIST_HEAD(&walk->all);
2080 walk->proto = proto;
2081 walk->state = XFRM_STATE_DEAD;
2083 walk->filter = filter;
2085 EXPORT_SYMBOL(xfrm_state_walk_init);
2087 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
2089 kfree(walk->filter);
2091 if (list_empty(&walk->all))
2094 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2095 list_del(&walk->all);
2096 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2098 EXPORT_SYMBOL(xfrm_state_walk_done);
2100 static void xfrm_replay_timer_handler(struct timer_list *t)
2102 struct xfrm_state *x = from_timer(x, t, rtimer);
2104 spin_lock(&x->lock);
2106 if (x->km.state == XFRM_STATE_VALID) {
2107 if (xfrm_aevent_is_on(xs_net(x)))
2108 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
2110 x->xflags |= XFRM_TIME_DEFER;
2113 spin_unlock(&x->lock);
2116 static LIST_HEAD(xfrm_km_list);
2118 void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2120 struct xfrm_mgr *km;
2123 list_for_each_entry_rcu(km, &xfrm_km_list, list)
2124 if (km->notify_policy)
2125 km->notify_policy(xp, dir, c);
2129 void km_state_notify(struct xfrm_state *x, const struct km_event *c)
2131 struct xfrm_mgr *km;
2133 list_for_each_entry_rcu(km, &xfrm_km_list, list)
2139 EXPORT_SYMBOL(km_policy_notify);
2140 EXPORT_SYMBOL(km_state_notify);
2142 void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
2148 c.event = XFRM_MSG_EXPIRE;
2149 km_state_notify(x, &c);
2152 EXPORT_SYMBOL(km_state_expired);
2154 * We send to all registered managers regardless of failure
2155 * We are happy with one success
2157 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
2159 int err = -EINVAL, acqret;
2160 struct xfrm_mgr *km;
2163 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2164 acqret = km->acquire(x, t, pol);
2171 EXPORT_SYMBOL(km_query);
2173 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
2176 struct xfrm_mgr *km;
2179 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2180 if (km->new_mapping)
2181 err = km->new_mapping(x, ipaddr, sport);
2188 EXPORT_SYMBOL(km_new_mapping);
2190 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
2196 c.event = XFRM_MSG_POLEXPIRE;
2197 km_policy_notify(pol, dir, &c);
2199 EXPORT_SYMBOL(km_policy_expired);
2201 #ifdef CONFIG_XFRM_MIGRATE
2202 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2203 const struct xfrm_migrate *m, int num_migrate,
2204 const struct xfrm_kmaddress *k,
2205 const struct xfrm_encap_tmpl *encap)
2209 struct xfrm_mgr *km;
2212 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2214 ret = km->migrate(sel, dir, type, m, num_migrate, k,
2223 EXPORT_SYMBOL(km_migrate);
2226 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
2230 struct xfrm_mgr *km;
2233 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2235 ret = km->report(net, proto, sel, addr);
2243 EXPORT_SYMBOL(km_report);
2245 static bool km_is_alive(const struct km_event *c)
2247 struct xfrm_mgr *km;
2248 bool is_alive = false;
2251 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2252 if (km->is_alive && km->is_alive(c)) {
2262 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
2266 struct xfrm_mgr *km;
2267 struct xfrm_policy *pol = NULL;
2269 if (in_compat_syscall())
2272 if (!optval && !optlen) {
2273 xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
2274 xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
2279 if (optlen <= 0 || optlen > PAGE_SIZE)
2282 data = memdup_user(optval, optlen);
2284 return PTR_ERR(data);
2288 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2289 pol = km->compile_policy(sk, optname, data,
2297 xfrm_sk_policy_insert(sk, err, pol);
2306 EXPORT_SYMBOL(xfrm_user_policy);
2308 static DEFINE_SPINLOCK(xfrm_km_lock);
2310 int xfrm_register_km(struct xfrm_mgr *km)
2312 spin_lock_bh(&xfrm_km_lock);
2313 list_add_tail_rcu(&km->list, &xfrm_km_list);
2314 spin_unlock_bh(&xfrm_km_lock);
2317 EXPORT_SYMBOL(xfrm_register_km);
2319 int xfrm_unregister_km(struct xfrm_mgr *km)
2321 spin_lock_bh(&xfrm_km_lock);
2322 list_del_rcu(&km->list);
2323 spin_unlock_bh(&xfrm_km_lock);
2327 EXPORT_SYMBOL(xfrm_unregister_km);
2329 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
2333 if (WARN_ON(afinfo->family >= NPROTO))
2334 return -EAFNOSUPPORT;
2336 spin_lock_bh(&xfrm_state_afinfo_lock);
2337 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
2340 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
2341 spin_unlock_bh(&xfrm_state_afinfo_lock);
2344 EXPORT_SYMBOL(xfrm_state_register_afinfo);
2346 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
2348 int err = 0, family = afinfo->family;
2350 if (WARN_ON(family >= NPROTO))
2351 return -EAFNOSUPPORT;
2353 spin_lock_bh(&xfrm_state_afinfo_lock);
2354 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
2355 if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
2358 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
2360 spin_unlock_bh(&xfrm_state_afinfo_lock);
2364 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
2366 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
2368 if (unlikely(family >= NPROTO))
2371 return rcu_dereference(xfrm_state_afinfo[family]);
2373 EXPORT_SYMBOL_GPL(xfrm_state_afinfo_get_rcu);
2375 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
2377 struct xfrm_state_afinfo *afinfo;
2378 if (unlikely(family >= NPROTO))
2381 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
2382 if (unlikely(!afinfo))
2387 void xfrm_flush_gc(void)
2389 flush_work(&xfrm_state_gc_work);
2391 EXPORT_SYMBOL(xfrm_flush_gc);
2393 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
2394 void xfrm_state_delete_tunnel(struct xfrm_state *x)
2397 struct xfrm_state *t = x->tunnel;
2399 if (atomic_read(&t->tunnel_users) == 2)
2400 xfrm_state_delete(t);
2401 atomic_dec(&t->tunnel_users);
2402 xfrm_state_put_sync(t);
2406 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
2408 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu)
2410 const struct xfrm_type *type = READ_ONCE(x->type);
2411 struct crypto_aead *aead;
2412 u32 blksize, net_adj = 0;
2414 if (x->km.state != XFRM_STATE_VALID ||
2415 !type || type->proto != IPPROTO_ESP)
2416 return mtu - x->props.header_len;
2419 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
2421 switch (x->props.mode) {
2422 case XFRM_MODE_TRANSPORT:
2423 case XFRM_MODE_BEET:
2424 if (x->props.family == AF_INET)
2425 net_adj = sizeof(struct iphdr);
2426 else if (x->props.family == AF_INET6)
2427 net_adj = sizeof(struct ipv6hdr);
2429 case XFRM_MODE_TUNNEL:
2436 return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
2437 net_adj) & ~(blksize - 1)) + net_adj - 2;
2439 EXPORT_SYMBOL_GPL(xfrm_state_mtu);
2441 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
2443 const struct xfrm_mode *inner_mode;
2444 const struct xfrm_mode *outer_mode;
2445 int family = x->props.family;
2448 if (family == AF_INET &&
2449 xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
2450 x->props.flags |= XFRM_STATE_NOPMTUDISC;
2452 err = -EPROTONOSUPPORT;
2454 if (x->sel.family != AF_UNSPEC) {
2455 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2456 if (inner_mode == NULL)
2459 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2460 family != x->sel.family)
2463 x->inner_mode = *inner_mode;
2465 const struct xfrm_mode *inner_mode_iaf;
2466 int iafamily = AF_INET;
2468 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
2469 if (inner_mode == NULL)
2472 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2475 x->inner_mode = *inner_mode;
2477 if (x->props.family == AF_INET)
2478 iafamily = AF_INET6;
2480 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2481 if (inner_mode_iaf) {
2482 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2483 x->inner_mode_iaf = *inner_mode_iaf;
2487 x->type = xfrm_get_type(x->id.proto, family);
2488 if (x->type == NULL)
2491 x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);
2493 err = x->type->init_state(x);
2497 outer_mode = xfrm_get_mode(x->props.mode, family);
2499 err = -EPROTONOSUPPORT;
2503 x->outer_mode = *outer_mode;
2505 err = xfrm_init_replay(x);
2514 EXPORT_SYMBOL(__xfrm_init_state);
2516 int xfrm_init_state(struct xfrm_state *x)
2520 err = __xfrm_init_state(x, true, false);
2522 x->km.state = XFRM_STATE_VALID;
2527 EXPORT_SYMBOL(xfrm_init_state);
2529 int __net_init xfrm_state_init(struct net *net)
2533 if (net_eq(net, &init_net))
2534 xfrm_state_cache = KMEM_CACHE(xfrm_state,
2535 SLAB_HWCACHE_ALIGN | SLAB_PANIC);
2537 INIT_LIST_HEAD(&net->xfrm.state_all);
2539 sz = sizeof(struct hlist_head) * 8;
2541 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2542 if (!net->xfrm.state_bydst)
2544 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2545 if (!net->xfrm.state_bysrc)
2547 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2548 if (!net->xfrm.state_byspi)
2550 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2552 net->xfrm.state_num = 0;
2553 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
2554 spin_lock_init(&net->xfrm.xfrm_state_lock);
2558 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2560 xfrm_hash_free(net->xfrm.state_bydst, sz);
2565 void xfrm_state_fini(struct net *net)
2569 flush_work(&net->xfrm.state_hash_work);
2570 flush_work(&xfrm_state_gc_work);
2571 xfrm_state_flush(net, 0, false, true);
2573 WARN_ON(!list_empty(&net->xfrm.state_all));
2575 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
2576 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2577 xfrm_hash_free(net->xfrm.state_byspi, sz);
2578 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2579 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2580 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2581 xfrm_hash_free(net->xfrm.state_bydst, sz);
2584 #ifdef CONFIG_AUDITSYSCALL
2585 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2586 struct audit_buffer *audit_buf)
2588 struct xfrm_sec_ctx *ctx = x->security;
2589 u32 spi = ntohl(x->id.spi);
2592 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2593 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2595 switch (x->props.family) {
2597 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2598 &x->props.saddr.a4, &x->id.daddr.a4);
2601 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
2602 x->props.saddr.a6, x->id.daddr.a6);
2606 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2609 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2610 struct audit_buffer *audit_buf)
2612 const struct iphdr *iph4;
2613 const struct ipv6hdr *iph6;
2618 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2619 &iph4->saddr, &iph4->daddr);
2622 iph6 = ipv6_hdr(skb);
2623 audit_log_format(audit_buf,
2624 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2625 &iph6->saddr, &iph6->daddr,
2626 iph6->flow_lbl[0] & 0x0f,
2633 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
2635 struct audit_buffer *audit_buf;
2637 audit_buf = xfrm_audit_start("SAD-add");
2638 if (audit_buf == NULL)
2640 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2641 xfrm_audit_helper_sainfo(x, audit_buf);
2642 audit_log_format(audit_buf, " res=%u", result);
2643 audit_log_end(audit_buf);
2645 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2647 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
2649 struct audit_buffer *audit_buf;
2651 audit_buf = xfrm_audit_start("SAD-delete");
2652 if (audit_buf == NULL)
2654 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2655 xfrm_audit_helper_sainfo(x, audit_buf);
2656 audit_log_format(audit_buf, " res=%u", result);
2657 audit_log_end(audit_buf);
2659 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2661 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2662 struct sk_buff *skb)
2664 struct audit_buffer *audit_buf;
2667 audit_buf = xfrm_audit_start("SA-replay-overflow");
2668 if (audit_buf == NULL)
2670 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2671 /* don't record the sequence number because it's inherent in this kind
2672 * of audit message */
2673 spi = ntohl(x->id.spi);
2674 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2675 audit_log_end(audit_buf);
2677 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2679 void xfrm_audit_state_replay(struct xfrm_state *x,
2680 struct sk_buff *skb, __be32 net_seq)
2682 struct audit_buffer *audit_buf;
2685 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2686 if (audit_buf == NULL)
2688 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2689 spi = ntohl(x->id.spi);
2690 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2691 spi, spi, ntohl(net_seq));
2692 audit_log_end(audit_buf);
2694 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
2696 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2698 struct audit_buffer *audit_buf;
2700 audit_buf = xfrm_audit_start("SA-notfound");
2701 if (audit_buf == NULL)
2703 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2704 audit_log_end(audit_buf);
2706 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2708 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2709 __be32 net_spi, __be32 net_seq)
2711 struct audit_buffer *audit_buf;
2714 audit_buf = xfrm_audit_start("SA-notfound");
2715 if (audit_buf == NULL)
2717 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2718 spi = ntohl(net_spi);
2719 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2720 spi, spi, ntohl(net_seq));
2721 audit_log_end(audit_buf);
2723 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2725 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2726 struct sk_buff *skb, u8 proto)
2728 struct audit_buffer *audit_buf;
2732 audit_buf = xfrm_audit_start("SA-icv-failure");
2733 if (audit_buf == NULL)
2735 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2736 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2737 u32 spi = ntohl(net_spi);
2738 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2739 spi, spi, ntohl(net_seq));
2741 audit_log_end(audit_buf);
2743 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2744 #endif /* CONFIG_AUDITSYSCALL */