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 <asm/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 /* Each xfrm_state may be linked to two tables:
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
34 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
35 destination/tunnel endpoint. (output)
38 static DEFINE_SPINLOCK(xfrm_state_lock);
40 static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
42 static inline unsigned int xfrm_dst_hash(struct net *net,
43 const xfrm_address_t *daddr,
44 const xfrm_address_t *saddr,
46 unsigned short family)
48 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
51 static inline unsigned int xfrm_src_hash(struct net *net,
52 const xfrm_address_t *daddr,
53 const xfrm_address_t *saddr,
54 unsigned short family)
56 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
59 static inline unsigned int
60 xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
61 __be32 spi, u8 proto, unsigned short family)
63 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
66 static void xfrm_hash_transfer(struct hlist_head *list,
67 struct hlist_head *ndsttable,
68 struct hlist_head *nsrctable,
69 struct hlist_head *nspitable,
70 unsigned int nhashmask)
72 struct hlist_node *tmp;
75 hlist_for_each_entry_safe(x, tmp, list, bydst) {
78 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
79 x->props.reqid, x->props.family,
81 hlist_add_head(&x->bydst, ndsttable+h);
83 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
86 hlist_add_head(&x->bysrc, nsrctable+h);
89 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
90 x->id.proto, x->props.family,
92 hlist_add_head(&x->byspi, nspitable+h);
97 static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
99 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
102 static DEFINE_MUTEX(hash_resize_mutex);
104 static void xfrm_hash_resize(struct work_struct *work)
106 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
107 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
108 unsigned long nsize, osize;
109 unsigned int nhashmask, ohashmask;
112 mutex_lock(&hash_resize_mutex);
114 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
115 ndst = xfrm_hash_alloc(nsize);
118 nsrc = xfrm_hash_alloc(nsize);
120 xfrm_hash_free(ndst, nsize);
123 nspi = xfrm_hash_alloc(nsize);
125 xfrm_hash_free(ndst, nsize);
126 xfrm_hash_free(nsrc, nsize);
130 spin_lock_bh(&xfrm_state_lock);
132 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
133 for (i = net->xfrm.state_hmask; i >= 0; i--)
134 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
137 odst = net->xfrm.state_bydst;
138 osrc = net->xfrm.state_bysrc;
139 ospi = net->xfrm.state_byspi;
140 ohashmask = net->xfrm.state_hmask;
142 net->xfrm.state_bydst = ndst;
143 net->xfrm.state_bysrc = nsrc;
144 net->xfrm.state_byspi = nspi;
145 net->xfrm.state_hmask = nhashmask;
147 spin_unlock_bh(&xfrm_state_lock);
149 osize = (ohashmask + 1) * sizeof(struct hlist_head);
150 xfrm_hash_free(odst, osize);
151 xfrm_hash_free(osrc, osize);
152 xfrm_hash_free(ospi, osize);
155 mutex_unlock(&hash_resize_mutex);
158 static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
159 static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
161 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
163 int __xfrm_state_delete(struct xfrm_state *x);
165 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
166 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
168 static DEFINE_SPINLOCK(xfrm_type_lock);
169 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
171 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
172 const struct xfrm_type **typemap;
175 if (unlikely(afinfo == NULL))
176 return -EAFNOSUPPORT;
177 typemap = afinfo->type_map;
178 spin_lock_bh(&xfrm_type_lock);
180 if (likely(typemap[type->proto] == NULL))
181 typemap[type->proto] = type;
184 spin_unlock_bh(&xfrm_type_lock);
185 xfrm_state_put_afinfo(afinfo);
188 EXPORT_SYMBOL(xfrm_register_type);
190 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
192 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
193 const struct xfrm_type **typemap;
196 if (unlikely(afinfo == NULL))
197 return -EAFNOSUPPORT;
198 typemap = afinfo->type_map;
199 spin_lock_bh(&xfrm_type_lock);
201 if (unlikely(typemap[type->proto] != type))
204 typemap[type->proto] = NULL;
205 spin_unlock_bh(&xfrm_type_lock);
206 xfrm_state_put_afinfo(afinfo);
209 EXPORT_SYMBOL(xfrm_unregister_type);
211 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
213 struct xfrm_state_afinfo *afinfo;
214 const struct xfrm_type **typemap;
215 const struct xfrm_type *type;
216 int modload_attempted = 0;
219 afinfo = xfrm_state_get_afinfo(family);
220 if (unlikely(afinfo == NULL))
222 typemap = afinfo->type_map;
224 type = typemap[proto];
225 if (unlikely(type && !try_module_get(type->owner)))
227 if (!type && !modload_attempted) {
228 xfrm_state_put_afinfo(afinfo);
229 request_module("xfrm-type-%d-%d", family, proto);
230 modload_attempted = 1;
234 xfrm_state_put_afinfo(afinfo);
238 static void xfrm_put_type(const struct xfrm_type *type)
240 module_put(type->owner);
243 static DEFINE_SPINLOCK(xfrm_mode_lock);
244 int xfrm_register_mode(struct xfrm_mode *mode, int family)
246 struct xfrm_state_afinfo *afinfo;
247 struct xfrm_mode **modemap;
250 if (unlikely(mode->encap >= XFRM_MODE_MAX))
253 afinfo = xfrm_state_get_afinfo(family);
254 if (unlikely(afinfo == NULL))
255 return -EAFNOSUPPORT;
258 modemap = afinfo->mode_map;
259 spin_lock_bh(&xfrm_mode_lock);
260 if (modemap[mode->encap])
264 if (!try_module_get(afinfo->owner))
267 mode->afinfo = afinfo;
268 modemap[mode->encap] = mode;
272 spin_unlock_bh(&xfrm_mode_lock);
273 xfrm_state_put_afinfo(afinfo);
276 EXPORT_SYMBOL(xfrm_register_mode);
278 int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
280 struct xfrm_state_afinfo *afinfo;
281 struct xfrm_mode **modemap;
284 if (unlikely(mode->encap >= XFRM_MODE_MAX))
287 afinfo = xfrm_state_get_afinfo(family);
288 if (unlikely(afinfo == NULL))
289 return -EAFNOSUPPORT;
292 modemap = afinfo->mode_map;
293 spin_lock_bh(&xfrm_mode_lock);
294 if (likely(modemap[mode->encap] == mode)) {
295 modemap[mode->encap] = NULL;
296 module_put(mode->afinfo->owner);
300 spin_unlock_bh(&xfrm_mode_lock);
301 xfrm_state_put_afinfo(afinfo);
304 EXPORT_SYMBOL(xfrm_unregister_mode);
306 static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
308 struct xfrm_state_afinfo *afinfo;
309 struct xfrm_mode *mode;
310 int modload_attempted = 0;
312 if (unlikely(encap >= XFRM_MODE_MAX))
316 afinfo = xfrm_state_get_afinfo(family);
317 if (unlikely(afinfo == NULL))
320 mode = afinfo->mode_map[encap];
321 if (unlikely(mode && !try_module_get(mode->owner)))
323 if (!mode && !modload_attempted) {
324 xfrm_state_put_afinfo(afinfo);
325 request_module("xfrm-mode-%d-%d", family, encap);
326 modload_attempted = 1;
330 xfrm_state_put_afinfo(afinfo);
334 static void xfrm_put_mode(struct xfrm_mode *mode)
336 module_put(mode->owner);
339 static void xfrm_state_gc_destroy(struct xfrm_state *x)
341 tasklet_hrtimer_cancel(&x->mtimer);
342 del_timer_sync(&x->rtimer);
348 kfree(x->replay_esn);
349 kfree(x->preplay_esn);
351 xfrm_put_mode(x->inner_mode);
352 if (x->inner_mode_iaf)
353 xfrm_put_mode(x->inner_mode_iaf);
355 xfrm_put_mode(x->outer_mode);
357 x->type->destructor(x);
358 xfrm_put_type(x->type);
360 security_xfrm_state_free(x);
364 static void xfrm_state_gc_task(struct work_struct *work)
366 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
367 struct xfrm_state *x;
368 struct hlist_node *tmp;
369 struct hlist_head gc_list;
371 spin_lock_bh(&xfrm_state_gc_lock);
372 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
373 spin_unlock_bh(&xfrm_state_gc_lock);
375 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
376 xfrm_state_gc_destroy(x);
378 wake_up(&net->xfrm.km_waitq);
381 static inline unsigned long make_jiffies(long secs)
383 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
384 return MAX_SCHEDULE_TIMEOUT-1;
389 static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
391 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
392 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
393 struct net *net = xs_net(x);
394 unsigned long now = get_seconds();
395 long next = LONG_MAX;
400 if (x->km.state == XFRM_STATE_DEAD)
402 if (x->km.state == XFRM_STATE_EXPIRED)
404 if (x->lft.hard_add_expires_seconds) {
405 long tmo = x->lft.hard_add_expires_seconds +
406 x->curlft.add_time - now;
408 if (x->xflags & XFRM_SOFT_EXPIRE) {
409 /* enter hard expire without soft expire first?!
410 * setting a new date could trigger this.
411 * workarbound: fix x->curflt.add_time by below:
413 x->curlft.add_time = now - x->saved_tmo - 1;
414 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
421 if (x->lft.hard_use_expires_seconds) {
422 long tmo = x->lft.hard_use_expires_seconds +
423 (x->curlft.use_time ? : now) - now;
431 if (x->lft.soft_add_expires_seconds) {
432 long tmo = x->lft.soft_add_expires_seconds +
433 x->curlft.add_time - now;
436 x->xflags &= ~XFRM_SOFT_EXPIRE;
437 } else if (tmo < next) {
439 x->xflags |= XFRM_SOFT_EXPIRE;
443 if (x->lft.soft_use_expires_seconds) {
444 long tmo = x->lft.soft_use_expires_seconds +
445 (x->curlft.use_time ? : now) - now;
454 km_state_expired(x, 0, 0);
456 if (next != LONG_MAX){
457 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
463 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
464 x->km.state = XFRM_STATE_EXPIRED;
465 wake_up(&net->xfrm.km_waitq);
470 err = __xfrm_state_delete(x);
471 if (!err && x->id.spi)
472 km_state_expired(x, 1, 0);
474 xfrm_audit_state_delete(x, err ? 0 : 1,
475 audit_get_loginuid(current),
476 audit_get_sessionid(current), 0);
479 spin_unlock(&x->lock);
480 return HRTIMER_NORESTART;
483 static void xfrm_replay_timer_handler(unsigned long data);
485 struct xfrm_state *xfrm_state_alloc(struct net *net)
487 struct xfrm_state *x;
489 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
492 write_pnet(&x->xs_net, net);
493 atomic_set(&x->refcnt, 1);
494 atomic_set(&x->tunnel_users, 0);
495 INIT_LIST_HEAD(&x->km.all);
496 INIT_HLIST_NODE(&x->bydst);
497 INIT_HLIST_NODE(&x->bysrc);
498 INIT_HLIST_NODE(&x->byspi);
499 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
500 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
502 x->curlft.add_time = get_seconds();
503 x->lft.soft_byte_limit = XFRM_INF;
504 x->lft.soft_packet_limit = XFRM_INF;
505 x->lft.hard_byte_limit = XFRM_INF;
506 x->lft.hard_packet_limit = XFRM_INF;
507 x->replay_maxage = 0;
508 x->replay_maxdiff = 0;
509 x->inner_mode = NULL;
510 x->inner_mode_iaf = NULL;
511 spin_lock_init(&x->lock);
515 EXPORT_SYMBOL(xfrm_state_alloc);
517 void __xfrm_state_destroy(struct xfrm_state *x)
519 struct net *net = xs_net(x);
521 WARN_ON(x->km.state != XFRM_STATE_DEAD);
523 spin_lock_bh(&xfrm_state_gc_lock);
524 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
525 spin_unlock_bh(&xfrm_state_gc_lock);
526 schedule_work(&net->xfrm.state_gc_work);
528 EXPORT_SYMBOL(__xfrm_state_destroy);
530 int __xfrm_state_delete(struct xfrm_state *x)
532 struct net *net = xs_net(x);
535 if (x->km.state != XFRM_STATE_DEAD) {
536 x->km.state = XFRM_STATE_DEAD;
537 spin_lock(&xfrm_state_lock);
538 list_del(&x->km.all);
539 hlist_del(&x->bydst);
540 hlist_del(&x->bysrc);
542 hlist_del(&x->byspi);
543 net->xfrm.state_num--;
544 spin_unlock(&xfrm_state_lock);
546 /* All xfrm_state objects are created by xfrm_state_alloc.
547 * The xfrm_state_alloc call gives a reference, and that
548 * is what we are dropping here.
556 EXPORT_SYMBOL(__xfrm_state_delete);
558 int xfrm_state_delete(struct xfrm_state *x)
562 spin_lock_bh(&x->lock);
563 err = __xfrm_state_delete(x);
564 spin_unlock_bh(&x->lock);
568 EXPORT_SYMBOL(xfrm_state_delete);
570 #ifdef CONFIG_SECURITY_NETWORK_XFRM
572 xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
576 for (i = 0; i <= net->xfrm.state_hmask; i++) {
577 struct xfrm_state *x;
579 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
580 if (xfrm_id_proto_match(x->id.proto, proto) &&
581 (err = security_xfrm_state_delete(x)) != 0) {
582 xfrm_audit_state_delete(x, 0,
583 audit_info->loginuid,
584 audit_info->sessionid,
595 xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
601 int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
603 int i, err = 0, cnt = 0;
605 spin_lock_bh(&xfrm_state_lock);
606 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
611 for (i = 0; i <= net->xfrm.state_hmask; i++) {
612 struct xfrm_state *x;
614 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
615 if (!xfrm_state_kern(x) &&
616 xfrm_id_proto_match(x->id.proto, proto)) {
618 spin_unlock_bh(&xfrm_state_lock);
620 err = xfrm_state_delete(x);
621 xfrm_audit_state_delete(x, err ? 0 : 1,
622 audit_info->loginuid,
623 audit_info->sessionid,
629 spin_lock_bh(&xfrm_state_lock);
638 spin_unlock_bh(&xfrm_state_lock);
639 wake_up(&net->xfrm.km_waitq);
642 EXPORT_SYMBOL(xfrm_state_flush);
644 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
646 spin_lock_bh(&xfrm_state_lock);
647 si->sadcnt = net->xfrm.state_num;
648 si->sadhcnt = net->xfrm.state_hmask;
649 si->sadhmcnt = xfrm_state_hashmax;
650 spin_unlock_bh(&xfrm_state_lock);
652 EXPORT_SYMBOL(xfrm_sad_getinfo);
655 xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
656 const struct xfrm_tmpl *tmpl,
657 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
658 unsigned short family)
660 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
663 afinfo->init_tempsel(&x->sel, fl);
665 if (family != tmpl->encap_family) {
666 xfrm_state_put_afinfo(afinfo);
667 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
671 afinfo->init_temprop(x, tmpl, daddr, saddr);
672 xfrm_state_put_afinfo(afinfo);
676 static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
677 const xfrm_address_t *daddr,
678 __be32 spi, u8 proto,
679 unsigned short family)
681 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
682 struct xfrm_state *x;
684 hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) {
685 if (x->props.family != family ||
687 x->id.proto != proto ||
688 !xfrm_addr_equal(&x->id.daddr, daddr, family))
691 if ((mark & x->mark.m) != x->mark.v)
700 static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
701 const xfrm_address_t *daddr,
702 const xfrm_address_t *saddr,
703 u8 proto, unsigned short family)
705 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
706 struct xfrm_state *x;
708 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
709 if (x->props.family != family ||
710 x->id.proto != proto ||
711 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
712 !xfrm_addr_equal(&x->props.saddr, saddr, family))
715 if ((mark & x->mark.m) != x->mark.v)
724 static inline struct xfrm_state *
725 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
727 struct net *net = xs_net(x);
728 u32 mark = x->mark.v & x->mark.m;
731 return __xfrm_state_lookup(net, mark, &x->id.daddr,
732 x->id.spi, x->id.proto, family);
734 return __xfrm_state_lookup_byaddr(net, mark,
737 x->id.proto, family);
740 static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
742 if (have_hash_collision &&
743 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
744 net->xfrm.state_num > net->xfrm.state_hmask)
745 schedule_work(&net->xfrm.state_hash_work);
748 static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
749 const struct flowi *fl, unsigned short family,
750 struct xfrm_state **best, int *acq_in_progress,
754 * 1. There is a valid state with matching selector. Done.
755 * 2. Valid state with inappropriate selector. Skip.
757 * Entering area of "sysdeps".
759 * 3. If state is not valid, selector is temporary, it selects
760 * only session which triggered previous resolution. Key
761 * manager will do something to install a state with proper
764 if (x->km.state == XFRM_STATE_VALID) {
765 if ((x->sel.family &&
766 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
767 !security_xfrm_state_pol_flow_match(x, pol, fl))
771 (*best)->km.dying > x->km.dying ||
772 ((*best)->km.dying == x->km.dying &&
773 (*best)->curlft.add_time < x->curlft.add_time))
775 } else if (x->km.state == XFRM_STATE_ACQ) {
776 *acq_in_progress = 1;
777 } else if (x->km.state == XFRM_STATE_ERROR ||
778 x->km.state == XFRM_STATE_EXPIRED) {
779 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
780 security_xfrm_state_pol_flow_match(x, pol, fl))
786 xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
787 const struct flowi *fl, struct xfrm_tmpl *tmpl,
788 struct xfrm_policy *pol, int *err,
789 unsigned short family)
791 static xfrm_address_t saddr_wildcard = { };
792 struct net *net = xp_net(pol);
793 unsigned int h, h_wildcard;
794 struct xfrm_state *x, *x0, *to_put;
795 int acquire_in_progress = 0;
797 struct xfrm_state *best = NULL;
798 u32 mark = pol->mark.v & pol->mark.m;
799 unsigned short encap_family = tmpl->encap_family;
803 spin_lock_bh(&xfrm_state_lock);
804 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
805 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
806 if (x->props.family == encap_family &&
807 x->props.reqid == tmpl->reqid &&
808 (mark & x->mark.m) == x->mark.v &&
809 !(x->props.flags & XFRM_STATE_WILDRECV) &&
810 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
811 tmpl->mode == x->props.mode &&
812 tmpl->id.proto == x->id.proto &&
813 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
814 xfrm_state_look_at(pol, x, fl, encap_family,
815 &best, &acquire_in_progress, &error);
820 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
821 hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) {
822 if (x->props.family == encap_family &&
823 x->props.reqid == tmpl->reqid &&
824 (mark & x->mark.m) == x->mark.v &&
825 !(x->props.flags & XFRM_STATE_WILDRECV) &&
826 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
827 tmpl->mode == x->props.mode &&
828 tmpl->id.proto == x->id.proto &&
829 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
830 xfrm_state_look_at(pol, x, fl, encap_family,
831 &best, &acquire_in_progress, &error);
836 if (!x && !error && !acquire_in_progress) {
838 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
839 tmpl->id.proto, encap_family)) != NULL) {
844 x = xfrm_state_alloc(net);
849 /* Initialize temporary state matching only
850 * to current session. */
851 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
852 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
854 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
856 x->km.state = XFRM_STATE_DEAD;
862 if (km_query(x, tmpl, pol) == 0) {
863 x->km.state = XFRM_STATE_ACQ;
864 list_add(&x->km.all, &net->xfrm.state_all);
865 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
866 h = xfrm_src_hash(net, daddr, saddr, encap_family);
867 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
869 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
870 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
872 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
873 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
874 net->xfrm.state_num++;
875 xfrm_hash_grow_check(net, x->bydst.next != NULL);
877 x->km.state = XFRM_STATE_DEAD;
887 *err = acquire_in_progress ? -EAGAIN : error;
888 spin_unlock_bh(&xfrm_state_lock);
890 xfrm_state_put(to_put);
895 xfrm_stateonly_find(struct net *net, u32 mark,
896 xfrm_address_t *daddr, xfrm_address_t *saddr,
897 unsigned short family, u8 mode, u8 proto, u32 reqid)
900 struct xfrm_state *rx = NULL, *x = NULL;
902 spin_lock(&xfrm_state_lock);
903 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
904 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
905 if (x->props.family == family &&
906 x->props.reqid == reqid &&
907 (mark & x->mark.m) == x->mark.v &&
908 !(x->props.flags & XFRM_STATE_WILDRECV) &&
909 xfrm_state_addr_check(x, daddr, saddr, family) &&
910 mode == x->props.mode &&
911 proto == x->id.proto &&
912 x->km.state == XFRM_STATE_VALID) {
920 spin_unlock(&xfrm_state_lock);
925 EXPORT_SYMBOL(xfrm_stateonly_find);
927 static void __xfrm_state_insert(struct xfrm_state *x)
929 struct net *net = xs_net(x);
932 list_add(&x->km.all, &net->xfrm.state_all);
934 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
935 x->props.reqid, x->props.family);
936 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
938 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
939 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
942 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
945 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
948 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
949 if (x->replay_maxage)
950 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
952 wake_up(&net->xfrm.km_waitq);
954 net->xfrm.state_num++;
956 xfrm_hash_grow_check(net, x->bydst.next != NULL);
959 /* xfrm_state_lock is held */
960 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
962 struct net *net = xs_net(xnew);
963 unsigned short family = xnew->props.family;
964 u32 reqid = xnew->props.reqid;
965 struct xfrm_state *x;
967 u32 mark = xnew->mark.v & xnew->mark.m;
969 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
970 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
971 if (x->props.family == family &&
972 x->props.reqid == reqid &&
973 (mark & x->mark.m) == x->mark.v &&
974 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
975 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
980 void xfrm_state_insert(struct xfrm_state *x)
982 spin_lock_bh(&xfrm_state_lock);
983 __xfrm_state_bump_genids(x);
984 __xfrm_state_insert(x);
985 spin_unlock_bh(&xfrm_state_lock);
987 EXPORT_SYMBOL(xfrm_state_insert);
989 /* xfrm_state_lock is held */
990 static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m,
991 unsigned short family, u8 mode,
993 const xfrm_address_t *daddr,
994 const xfrm_address_t *saddr, int create)
996 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
997 struct xfrm_state *x;
998 u32 mark = m->v & m->m;
1000 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1001 if (x->props.reqid != reqid ||
1002 x->props.mode != mode ||
1003 x->props.family != family ||
1004 x->km.state != XFRM_STATE_ACQ ||
1006 x->id.proto != proto ||
1007 (mark & x->mark.m) != x->mark.v ||
1008 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1009 !xfrm_addr_equal(&x->props.saddr, saddr, family))
1019 x = xfrm_state_alloc(net);
1023 x->sel.daddr.a4 = daddr->a4;
1024 x->sel.saddr.a4 = saddr->a4;
1025 x->sel.prefixlen_d = 32;
1026 x->sel.prefixlen_s = 32;
1027 x->props.saddr.a4 = saddr->a4;
1028 x->id.daddr.a4 = daddr->a4;
1032 *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
1033 *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
1034 x->sel.prefixlen_d = 128;
1035 x->sel.prefixlen_s = 128;
1036 *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
1037 *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
1041 x->km.state = XFRM_STATE_ACQ;
1042 x->id.proto = proto;
1043 x->props.family = family;
1044 x->props.mode = mode;
1045 x->props.reqid = reqid;
1048 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1050 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
1051 list_add(&x->km.all, &net->xfrm.state_all);
1052 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1053 h = xfrm_src_hash(net, daddr, saddr, family);
1054 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1056 net->xfrm.state_num++;
1058 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1064 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1066 int xfrm_state_add(struct xfrm_state *x)
1068 struct net *net = xs_net(x);
1069 struct xfrm_state *x1, *to_put;
1072 u32 mark = x->mark.v & x->mark.m;
1073 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1075 family = x->props.family;
1079 spin_lock_bh(&xfrm_state_lock);
1081 x1 = __xfrm_state_locate(x, use_spi, family);
1089 if (use_spi && x->km.seq) {
1090 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
1091 if (x1 && ((x1->id.proto != x->id.proto) ||
1092 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
1099 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1100 x->props.reqid, x->id.proto,
1101 &x->id.daddr, &x->props.saddr, 0);
1103 __xfrm_state_bump_genids(x);
1104 __xfrm_state_insert(x);
1108 spin_unlock_bh(&xfrm_state_lock);
1111 xfrm_state_delete(x1);
1116 xfrm_state_put(to_put);
1120 EXPORT_SYMBOL(xfrm_state_add);
1122 #ifdef CONFIG_XFRM_MIGRATE
1123 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
1125 struct net *net = xs_net(orig);
1127 struct xfrm_state *x = xfrm_state_alloc(net);
1131 memcpy(&x->id, &orig->id, sizeof(x->id));
1132 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1133 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1134 x->props.mode = orig->props.mode;
1135 x->props.replay_window = orig->props.replay_window;
1136 x->props.reqid = orig->props.reqid;
1137 x->props.family = orig->props.family;
1138 x->props.saddr = orig->props.saddr;
1141 x->aalg = xfrm_algo_auth_clone(orig->aalg);
1145 x->props.aalgo = orig->props.aalgo;
1148 x->ealg = xfrm_algo_clone(orig->ealg);
1152 x->props.ealgo = orig->props.ealgo;
1155 x->calg = xfrm_algo_clone(orig->calg);
1159 x->props.calgo = orig->props.calgo;
1162 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1168 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1174 if (orig->replay_esn) {
1175 err = xfrm_replay_clone(x, orig);
1180 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1182 err = xfrm_init_state(x);
1186 x->props.flags = orig->props.flags;
1187 x->props.extra_flags = orig->props.extra_flags;
1189 x->curlft.add_time = orig->curlft.add_time;
1190 x->km.state = orig->km.state;
1191 x->km.seq = orig->km.seq;
1203 /* xfrm_state_lock is held */
1204 struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1207 struct xfrm_state *x;
1210 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
1211 m->reqid, m->old_family);
1212 hlist_for_each_entry(x, init_net.xfrm.state_bydst+h, bydst) {
1213 if (x->props.mode != m->mode ||
1214 x->id.proto != m->proto)
1216 if (m->reqid && x->props.reqid != m->reqid)
1218 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1220 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1227 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
1229 hlist_for_each_entry(x, init_net.xfrm.state_bysrc+h, bysrc) {
1230 if (x->props.mode != m->mode ||
1231 x->id.proto != m->proto)
1233 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1235 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1245 EXPORT_SYMBOL(xfrm_migrate_state_find);
1247 struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1248 struct xfrm_migrate *m)
1250 struct xfrm_state *xc;
1253 xc = xfrm_state_clone(x, &err);
1257 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1258 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1261 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
1262 /* a care is needed when the destination address of the
1263 state is to be updated as it is a part of triplet */
1264 xfrm_state_insert(xc);
1266 if ((err = xfrm_state_add(xc)) < 0)
1275 EXPORT_SYMBOL(xfrm_state_migrate);
1278 int xfrm_state_update(struct xfrm_state *x)
1280 struct xfrm_state *x1, *to_put;
1282 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1286 spin_lock_bh(&xfrm_state_lock);
1287 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1293 if (xfrm_state_kern(x1)) {
1299 if (x1->km.state == XFRM_STATE_ACQ) {
1300 __xfrm_state_insert(x);
1306 spin_unlock_bh(&xfrm_state_lock);
1309 xfrm_state_put(to_put);
1315 xfrm_state_delete(x1);
1321 spin_lock_bh(&x1->lock);
1322 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1323 if (x->encap && x1->encap)
1324 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1325 if (x->coaddr && x1->coaddr) {
1326 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1328 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1329 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1330 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1333 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1334 if (x1->curlft.use_time)
1335 xfrm_state_check_expire(x1);
1338 x->km.state = XFRM_STATE_DEAD;
1339 __xfrm_state_put(x);
1341 spin_unlock_bh(&x1->lock);
1347 EXPORT_SYMBOL(xfrm_state_update);
1349 int xfrm_state_check_expire(struct xfrm_state *x)
1351 if (!x->curlft.use_time)
1352 x->curlft.use_time = get_seconds();
1354 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1355 x->curlft.packets >= x->lft.hard_packet_limit) {
1356 x->km.state = XFRM_STATE_EXPIRED;
1357 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1362 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1363 x->curlft.packets >= x->lft.soft_packet_limit)) {
1365 km_state_expired(x, 0, 0);
1369 EXPORT_SYMBOL(xfrm_state_check_expire);
1372 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
1373 u8 proto, unsigned short family)
1375 struct xfrm_state *x;
1377 spin_lock_bh(&xfrm_state_lock);
1378 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1379 spin_unlock_bh(&xfrm_state_lock);
1382 EXPORT_SYMBOL(xfrm_state_lookup);
1385 xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1386 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1387 u8 proto, unsigned short family)
1389 struct xfrm_state *x;
1391 spin_lock_bh(&xfrm_state_lock);
1392 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
1393 spin_unlock_bh(&xfrm_state_lock);
1396 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1399 xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
1400 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1401 int create, unsigned short family)
1403 struct xfrm_state *x;
1405 spin_lock_bh(&xfrm_state_lock);
1406 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1407 spin_unlock_bh(&xfrm_state_lock);
1411 EXPORT_SYMBOL(xfrm_find_acq);
1413 #ifdef CONFIG_XFRM_SUB_POLICY
1415 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1416 unsigned short family)
1419 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1421 return -EAFNOSUPPORT;
1423 spin_lock_bh(&xfrm_state_lock);
1424 if (afinfo->tmpl_sort)
1425 err = afinfo->tmpl_sort(dst, src, n);
1426 spin_unlock_bh(&xfrm_state_lock);
1427 xfrm_state_put_afinfo(afinfo);
1430 EXPORT_SYMBOL(xfrm_tmpl_sort);
1433 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1434 unsigned short family)
1437 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1439 return -EAFNOSUPPORT;
1441 spin_lock_bh(&xfrm_state_lock);
1442 if (afinfo->state_sort)
1443 err = afinfo->state_sort(dst, src, n);
1444 spin_unlock_bh(&xfrm_state_lock);
1445 xfrm_state_put_afinfo(afinfo);
1448 EXPORT_SYMBOL(xfrm_state_sort);
1451 /* Silly enough, but I'm lazy to build resolution list */
1453 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1457 for (i = 0; i <= net->xfrm.state_hmask; i++) {
1458 struct xfrm_state *x;
1460 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1461 if (x->km.seq == seq &&
1462 (mark & x->mark.m) == x->mark.v &&
1463 x->km.state == XFRM_STATE_ACQ) {
1472 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1474 struct xfrm_state *x;
1476 spin_lock_bh(&xfrm_state_lock);
1477 x = __xfrm_find_acq_byseq(net, mark, seq);
1478 spin_unlock_bh(&xfrm_state_lock);
1481 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1483 u32 xfrm_get_acqseq(void)
1486 static atomic_t acqseq;
1489 res = atomic_inc_return(&acqseq);
1494 EXPORT_SYMBOL(xfrm_get_acqseq);
1496 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1498 struct net *net = xs_net(x);
1500 struct xfrm_state *x0;
1502 __be32 minspi = htonl(low);
1503 __be32 maxspi = htonl(high);
1504 u32 mark = x->mark.v & x->mark.m;
1506 spin_lock_bh(&x->lock);
1507 if (x->km.state == XFRM_STATE_DEAD)
1516 if (minspi == maxspi) {
1517 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1525 for (h=0; h<high-low+1; h++) {
1526 spi = low + net_random()%(high-low+1);
1527 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1529 x->id.spi = htonl(spi);
1536 spin_lock_bh(&xfrm_state_lock);
1537 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1538 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1539 spin_unlock_bh(&xfrm_state_lock);
1545 spin_unlock_bh(&x->lock);
1549 EXPORT_SYMBOL(xfrm_alloc_spi);
1551 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1552 int (*func)(struct xfrm_state *, int, void*),
1555 struct xfrm_state *state;
1556 struct xfrm_state_walk *x;
1559 if (walk->seq != 0 && list_empty(&walk->all))
1562 spin_lock_bh(&xfrm_state_lock);
1563 if (list_empty(&walk->all))
1564 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
1566 x = list_entry(&walk->all, struct xfrm_state_walk, all);
1567 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
1568 if (x->state == XFRM_STATE_DEAD)
1570 state = container_of(x, struct xfrm_state, km);
1571 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
1573 err = func(state, walk->seq, data);
1575 list_move_tail(&walk->all, &x->all);
1580 if (walk->seq == 0) {
1584 list_del_init(&walk->all);
1586 spin_unlock_bh(&xfrm_state_lock);
1589 EXPORT_SYMBOL(xfrm_state_walk);
1591 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1593 INIT_LIST_HEAD(&walk->all);
1594 walk->proto = proto;
1595 walk->state = XFRM_STATE_DEAD;
1598 EXPORT_SYMBOL(xfrm_state_walk_init);
1600 void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1602 if (list_empty(&walk->all))
1605 spin_lock_bh(&xfrm_state_lock);
1606 list_del(&walk->all);
1607 spin_unlock_bh(&xfrm_state_lock);
1609 EXPORT_SYMBOL(xfrm_state_walk_done);
1611 static void xfrm_replay_timer_handler(unsigned long data)
1613 struct xfrm_state *x = (struct xfrm_state*)data;
1615 spin_lock(&x->lock);
1617 if (x->km.state == XFRM_STATE_VALID) {
1618 if (xfrm_aevent_is_on(xs_net(x)))
1619 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
1621 x->xflags |= XFRM_TIME_DEFER;
1624 spin_unlock(&x->lock);
1627 static LIST_HEAD(xfrm_km_list);
1629 void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1631 struct xfrm_mgr *km;
1634 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1635 if (km->notify_policy)
1636 km->notify_policy(xp, dir, c);
1640 void km_state_notify(struct xfrm_state *x, const struct km_event *c)
1642 struct xfrm_mgr *km;
1644 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1650 EXPORT_SYMBOL(km_policy_notify);
1651 EXPORT_SYMBOL(km_state_notify);
1653 void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
1655 struct net *net = xs_net(x);
1660 c.event = XFRM_MSG_EXPIRE;
1661 km_state_notify(x, &c);
1664 wake_up(&net->xfrm.km_waitq);
1667 EXPORT_SYMBOL(km_state_expired);
1669 * We send to all registered managers regardless of failure
1670 * We are happy with one success
1672 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1674 int err = -EINVAL, acqret;
1675 struct xfrm_mgr *km;
1678 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1679 acqret = km->acquire(x, t, pol);
1686 EXPORT_SYMBOL(km_query);
1688 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1691 struct xfrm_mgr *km;
1694 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1695 if (km->new_mapping)
1696 err = km->new_mapping(x, ipaddr, sport);
1703 EXPORT_SYMBOL(km_new_mapping);
1705 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1707 struct net *net = xp_net(pol);
1712 c.event = XFRM_MSG_POLEXPIRE;
1713 km_policy_notify(pol, dir, &c);
1716 wake_up(&net->xfrm.km_waitq);
1718 EXPORT_SYMBOL(km_policy_expired);
1720 #ifdef CONFIG_XFRM_MIGRATE
1721 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1722 const struct xfrm_migrate *m, int num_migrate,
1723 const struct xfrm_kmaddress *k)
1727 struct xfrm_mgr *km;
1730 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1732 ret = km->migrate(sel, dir, type, m, num_migrate, k);
1740 EXPORT_SYMBOL(km_migrate);
1743 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
1747 struct xfrm_mgr *km;
1750 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1752 ret = km->report(net, proto, sel, addr);
1760 EXPORT_SYMBOL(km_report);
1762 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1766 struct xfrm_mgr *km;
1767 struct xfrm_policy *pol = NULL;
1769 if (optlen <= 0 || optlen > PAGE_SIZE)
1772 data = kmalloc(optlen, GFP_KERNEL);
1777 if (copy_from_user(data, optval, optlen))
1782 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1783 pol = km->compile_policy(sk, optname, data,
1791 xfrm_sk_policy_insert(sk, err, pol);
1800 EXPORT_SYMBOL(xfrm_user_policy);
1802 static DEFINE_SPINLOCK(xfrm_km_lock);
1804 int xfrm_register_km(struct xfrm_mgr *km)
1806 spin_lock_bh(&xfrm_km_lock);
1807 list_add_tail_rcu(&km->list, &xfrm_km_list);
1808 spin_unlock_bh(&xfrm_km_lock);
1811 EXPORT_SYMBOL(xfrm_register_km);
1813 int xfrm_unregister_km(struct xfrm_mgr *km)
1815 spin_lock_bh(&xfrm_km_lock);
1816 list_del_rcu(&km->list);
1817 spin_unlock_bh(&xfrm_km_lock);
1821 EXPORT_SYMBOL(xfrm_unregister_km);
1823 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1826 if (unlikely(afinfo == NULL))
1828 if (unlikely(afinfo->family >= NPROTO))
1829 return -EAFNOSUPPORT;
1830 spin_lock_bh(&xfrm_state_afinfo_lock);
1831 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1834 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
1835 spin_unlock_bh(&xfrm_state_afinfo_lock);
1838 EXPORT_SYMBOL(xfrm_state_register_afinfo);
1840 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1843 if (unlikely(afinfo == NULL))
1845 if (unlikely(afinfo->family >= NPROTO))
1846 return -EAFNOSUPPORT;
1847 spin_lock_bh(&xfrm_state_afinfo_lock);
1848 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1849 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1852 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1854 spin_unlock_bh(&xfrm_state_afinfo_lock);
1858 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1860 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1862 struct xfrm_state_afinfo *afinfo;
1863 if (unlikely(family >= NPROTO))
1866 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
1867 if (unlikely(!afinfo))
1872 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1877 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1878 void xfrm_state_delete_tunnel(struct xfrm_state *x)
1881 struct xfrm_state *t = x->tunnel;
1883 if (atomic_read(&t->tunnel_users) == 2)
1884 xfrm_state_delete(t);
1885 atomic_dec(&t->tunnel_users);
1890 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1892 int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1896 spin_lock_bh(&x->lock);
1897 if (x->km.state == XFRM_STATE_VALID &&
1898 x->type && x->type->get_mtu)
1899 res = x->type->get_mtu(x, mtu);
1901 res = mtu - x->props.header_len;
1902 spin_unlock_bh(&x->lock);
1906 int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
1908 struct xfrm_state_afinfo *afinfo;
1909 struct xfrm_mode *inner_mode;
1910 int family = x->props.family;
1913 err = -EAFNOSUPPORT;
1914 afinfo = xfrm_state_get_afinfo(family);
1919 if (afinfo->init_flags)
1920 err = afinfo->init_flags(x);
1922 xfrm_state_put_afinfo(afinfo);
1927 err = -EPROTONOSUPPORT;
1929 if (x->sel.family != AF_UNSPEC) {
1930 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1931 if (inner_mode == NULL)
1934 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
1935 family != x->sel.family) {
1936 xfrm_put_mode(inner_mode);
1940 x->inner_mode = inner_mode;
1942 struct xfrm_mode *inner_mode_iaf;
1943 int iafamily = AF_INET;
1945 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
1946 if (inner_mode == NULL)
1949 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
1950 xfrm_put_mode(inner_mode);
1953 x->inner_mode = inner_mode;
1955 if (x->props.family == AF_INET)
1956 iafamily = AF_INET6;
1958 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
1959 if (inner_mode_iaf) {
1960 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
1961 x->inner_mode_iaf = inner_mode_iaf;
1963 xfrm_put_mode(inner_mode_iaf);
1967 x->type = xfrm_get_type(x->id.proto, family);
1968 if (x->type == NULL)
1971 err = x->type->init_state(x);
1975 x->outer_mode = xfrm_get_mode(x->props.mode, family);
1976 if (x->outer_mode == NULL) {
1977 err = -EPROTONOSUPPORT;
1982 err = xfrm_init_replay(x);
1987 x->km.state = XFRM_STATE_VALID;
1993 EXPORT_SYMBOL(__xfrm_init_state);
1995 int xfrm_init_state(struct xfrm_state *x)
1997 return __xfrm_init_state(x, true);
2000 EXPORT_SYMBOL(xfrm_init_state);
2002 int __net_init xfrm_state_init(struct net *net)
2006 INIT_LIST_HEAD(&net->xfrm.state_all);
2008 sz = sizeof(struct hlist_head) * 8;
2010 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2011 if (!net->xfrm.state_bydst)
2013 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2014 if (!net->xfrm.state_bysrc)
2016 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2017 if (!net->xfrm.state_byspi)
2019 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2021 net->xfrm.state_num = 0;
2022 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
2023 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
2024 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
2025 init_waitqueue_head(&net->xfrm.km_waitq);
2029 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2031 xfrm_hash_free(net->xfrm.state_bydst, sz);
2036 void xfrm_state_fini(struct net *net)
2038 struct xfrm_audit audit_info;
2041 flush_work(&net->xfrm.state_hash_work);
2042 audit_info.loginuid = INVALID_UID;
2043 audit_info.sessionid = -1;
2044 audit_info.secid = 0;
2045 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2046 flush_work(&net->xfrm.state_gc_work);
2048 WARN_ON(!list_empty(&net->xfrm.state_all));
2050 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
2051 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2052 xfrm_hash_free(net->xfrm.state_byspi, sz);
2053 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2054 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2055 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2056 xfrm_hash_free(net->xfrm.state_bydst, sz);
2059 #ifdef CONFIG_AUDITSYSCALL
2060 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2061 struct audit_buffer *audit_buf)
2063 struct xfrm_sec_ctx *ctx = x->security;
2064 u32 spi = ntohl(x->id.spi);
2067 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2068 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2070 switch(x->props.family) {
2072 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2073 &x->props.saddr.a4, &x->id.daddr.a4);
2076 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
2077 x->props.saddr.a6, x->id.daddr.a6);
2081 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2084 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2085 struct audit_buffer *audit_buf)
2087 const struct iphdr *iph4;
2088 const struct ipv6hdr *iph6;
2093 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2094 &iph4->saddr, &iph4->daddr);
2097 iph6 = ipv6_hdr(skb);
2098 audit_log_format(audit_buf,
2099 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2100 &iph6->saddr,&iph6->daddr,
2101 iph6->flow_lbl[0] & 0x0f,
2108 void xfrm_audit_state_add(struct xfrm_state *x, int result,
2109 kuid_t auid, u32 sessionid, u32 secid)
2111 struct audit_buffer *audit_buf;
2113 audit_buf = xfrm_audit_start("SAD-add");
2114 if (audit_buf == NULL)
2116 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2117 xfrm_audit_helper_sainfo(x, audit_buf);
2118 audit_log_format(audit_buf, " res=%u", result);
2119 audit_log_end(audit_buf);
2121 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2123 void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2124 kuid_t auid, u32 sessionid, u32 secid)
2126 struct audit_buffer *audit_buf;
2128 audit_buf = xfrm_audit_start("SAD-delete");
2129 if (audit_buf == NULL)
2131 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2132 xfrm_audit_helper_sainfo(x, audit_buf);
2133 audit_log_format(audit_buf, " res=%u", result);
2134 audit_log_end(audit_buf);
2136 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2138 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2139 struct sk_buff *skb)
2141 struct audit_buffer *audit_buf;
2144 audit_buf = xfrm_audit_start("SA-replay-overflow");
2145 if (audit_buf == NULL)
2147 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2148 /* don't record the sequence number because it's inherent in this kind
2149 * of audit message */
2150 spi = ntohl(x->id.spi);
2151 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2152 audit_log_end(audit_buf);
2154 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2156 void xfrm_audit_state_replay(struct xfrm_state *x,
2157 struct sk_buff *skb, __be32 net_seq)
2159 struct audit_buffer *audit_buf;
2162 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2163 if (audit_buf == NULL)
2165 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2166 spi = ntohl(x->id.spi);
2167 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2168 spi, spi, ntohl(net_seq));
2169 audit_log_end(audit_buf);
2171 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
2173 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2175 struct audit_buffer *audit_buf;
2177 audit_buf = xfrm_audit_start("SA-notfound");
2178 if (audit_buf == NULL)
2180 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2181 audit_log_end(audit_buf);
2183 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2185 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2186 __be32 net_spi, __be32 net_seq)
2188 struct audit_buffer *audit_buf;
2191 audit_buf = xfrm_audit_start("SA-notfound");
2192 if (audit_buf == NULL)
2194 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2195 spi = ntohl(net_spi);
2196 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2197 spi, spi, ntohl(net_seq));
2198 audit_log_end(audit_buf);
2200 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2202 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2203 struct sk_buff *skb, u8 proto)
2205 struct audit_buffer *audit_buf;
2209 audit_buf = xfrm_audit_start("SA-icv-failure");
2210 if (audit_buf == NULL)
2212 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2213 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2214 u32 spi = ntohl(net_spi);
2215 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2216 spi, spi, ntohl(net_seq));
2218 audit_log_end(audit_buf);
2220 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2221 #endif /* CONFIG_AUDITSYSCALL */