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 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
43 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
45 static inline unsigned int xfrm_dst_hash(struct net *net,
46 const xfrm_address_t *daddr,
47 const xfrm_address_t *saddr,
49 unsigned short family)
51 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
54 static inline unsigned int xfrm_src_hash(struct net *net,
55 const xfrm_address_t *daddr,
56 const xfrm_address_t *saddr,
57 unsigned short family)
59 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
62 static inline unsigned int
63 xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
64 __be32 spi, u8 proto, unsigned short family)
66 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
69 static void xfrm_hash_transfer(struct hlist_head *list,
70 struct hlist_head *ndsttable,
71 struct hlist_head *nsrctable,
72 struct hlist_head *nspitable,
73 unsigned int nhashmask)
75 struct hlist_node *entry, *tmp;
78 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
81 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
82 x->props.reqid, x->props.family,
84 hlist_add_head(&x->bydst, ndsttable+h);
86 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
89 hlist_add_head(&x->bysrc, nsrctable+h);
92 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
93 x->id.proto, x->props.family,
95 hlist_add_head(&x->byspi, nspitable+h);
100 static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
102 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
105 static DEFINE_MUTEX(hash_resize_mutex);
107 static void xfrm_hash_resize(struct work_struct *work)
109 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
110 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
111 unsigned long nsize, osize;
112 unsigned int nhashmask, ohashmask;
115 mutex_lock(&hash_resize_mutex);
117 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
118 ndst = xfrm_hash_alloc(nsize);
121 nsrc = xfrm_hash_alloc(nsize);
123 xfrm_hash_free(ndst, nsize);
126 nspi = xfrm_hash_alloc(nsize);
128 xfrm_hash_free(ndst, nsize);
129 xfrm_hash_free(nsrc, nsize);
133 spin_lock_bh(&xfrm_state_lock);
135 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
136 for (i = net->xfrm.state_hmask; i >= 0; i--)
137 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
140 odst = net->xfrm.state_bydst;
141 osrc = net->xfrm.state_bysrc;
142 ospi = net->xfrm.state_byspi;
143 ohashmask = net->xfrm.state_hmask;
145 net->xfrm.state_bydst = ndst;
146 net->xfrm.state_bysrc = nsrc;
147 net->xfrm.state_byspi = nspi;
148 net->xfrm.state_hmask = nhashmask;
150 spin_unlock_bh(&xfrm_state_lock);
152 osize = (ohashmask + 1) * sizeof(struct hlist_head);
153 xfrm_hash_free(odst, osize);
154 xfrm_hash_free(osrc, osize);
155 xfrm_hash_free(ospi, osize);
158 mutex_unlock(&hash_resize_mutex);
161 static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
162 static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
164 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
166 int __xfrm_state_delete(struct xfrm_state *x);
168 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
169 void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
171 static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
173 struct xfrm_state_afinfo *afinfo;
174 if (unlikely(family >= NPROTO))
176 write_lock_bh(&xfrm_state_afinfo_lock);
177 afinfo = xfrm_state_afinfo[family];
178 if (unlikely(!afinfo))
179 write_unlock_bh(&xfrm_state_afinfo_lock);
183 static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
184 __releases(xfrm_state_afinfo_lock)
186 write_unlock_bh(&xfrm_state_afinfo_lock);
189 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
191 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
192 const struct xfrm_type **typemap;
195 if (unlikely(afinfo == NULL))
196 return -EAFNOSUPPORT;
197 typemap = afinfo->type_map;
199 if (likely(typemap[type->proto] == NULL))
200 typemap[type->proto] = type;
203 xfrm_state_unlock_afinfo(afinfo);
206 EXPORT_SYMBOL(xfrm_register_type);
208 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
210 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
211 const struct xfrm_type **typemap;
214 if (unlikely(afinfo == NULL))
215 return -EAFNOSUPPORT;
216 typemap = afinfo->type_map;
218 if (unlikely(typemap[type->proto] != type))
221 typemap[type->proto] = NULL;
222 xfrm_state_unlock_afinfo(afinfo);
225 EXPORT_SYMBOL(xfrm_unregister_type);
227 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
229 struct xfrm_state_afinfo *afinfo;
230 const struct xfrm_type **typemap;
231 const struct xfrm_type *type;
232 int modload_attempted = 0;
235 afinfo = xfrm_state_get_afinfo(family);
236 if (unlikely(afinfo == NULL))
238 typemap = afinfo->type_map;
240 type = typemap[proto];
241 if (unlikely(type && !try_module_get(type->owner)))
243 if (!type && !modload_attempted) {
244 xfrm_state_put_afinfo(afinfo);
245 request_module("xfrm-type-%d-%d", family, proto);
246 modload_attempted = 1;
250 xfrm_state_put_afinfo(afinfo);
254 static void xfrm_put_type(const struct xfrm_type *type)
256 module_put(type->owner);
259 int xfrm_register_mode(struct xfrm_mode *mode, int family)
261 struct xfrm_state_afinfo *afinfo;
262 struct xfrm_mode **modemap;
265 if (unlikely(mode->encap >= XFRM_MODE_MAX))
268 afinfo = xfrm_state_lock_afinfo(family);
269 if (unlikely(afinfo == NULL))
270 return -EAFNOSUPPORT;
273 modemap = afinfo->mode_map;
274 if (modemap[mode->encap])
278 if (!try_module_get(afinfo->owner))
281 mode->afinfo = afinfo;
282 modemap[mode->encap] = mode;
286 xfrm_state_unlock_afinfo(afinfo);
289 EXPORT_SYMBOL(xfrm_register_mode);
291 int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
293 struct xfrm_state_afinfo *afinfo;
294 struct xfrm_mode **modemap;
297 if (unlikely(mode->encap >= XFRM_MODE_MAX))
300 afinfo = xfrm_state_lock_afinfo(family);
301 if (unlikely(afinfo == NULL))
302 return -EAFNOSUPPORT;
305 modemap = afinfo->mode_map;
306 if (likely(modemap[mode->encap] == mode)) {
307 modemap[mode->encap] = NULL;
308 module_put(mode->afinfo->owner);
312 xfrm_state_unlock_afinfo(afinfo);
315 EXPORT_SYMBOL(xfrm_unregister_mode);
317 static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
319 struct xfrm_state_afinfo *afinfo;
320 struct xfrm_mode *mode;
321 int modload_attempted = 0;
323 if (unlikely(encap >= XFRM_MODE_MAX))
327 afinfo = xfrm_state_get_afinfo(family);
328 if (unlikely(afinfo == NULL))
331 mode = afinfo->mode_map[encap];
332 if (unlikely(mode && !try_module_get(mode->owner)))
334 if (!mode && !modload_attempted) {
335 xfrm_state_put_afinfo(afinfo);
336 request_module("xfrm-mode-%d-%d", family, encap);
337 modload_attempted = 1;
341 xfrm_state_put_afinfo(afinfo);
345 static void xfrm_put_mode(struct xfrm_mode *mode)
347 module_put(mode->owner);
350 static void xfrm_state_gc_destroy(struct xfrm_state *x)
352 tasklet_hrtimer_cancel(&x->mtimer);
353 del_timer_sync(&x->rtimer);
360 kfree(x->replay_esn);
361 kfree(x->preplay_esn);
363 xfrm_put_mode(x->inner_mode);
364 if (x->inner_mode_iaf)
365 xfrm_put_mode(x->inner_mode_iaf);
367 xfrm_put_mode(x->outer_mode);
369 x->type->destructor(x);
370 xfrm_put_type(x->type);
372 security_xfrm_state_free(x);
376 static void xfrm_state_gc_task(struct work_struct *work)
378 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
379 struct xfrm_state *x;
380 struct hlist_node *entry, *tmp;
381 struct hlist_head gc_list;
383 spin_lock_bh(&xfrm_state_gc_lock);
384 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
385 spin_unlock_bh(&xfrm_state_gc_lock);
387 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
388 xfrm_state_gc_destroy(x);
390 wake_up(&net->xfrm.km_waitq);
393 static inline unsigned long make_jiffies(long secs)
395 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
396 return MAX_SCHEDULE_TIMEOUT-1;
401 static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
403 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
404 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
405 struct net *net = xs_net(x);
406 unsigned long now = get_seconds();
407 long next = LONG_MAX;
412 if (x->km.state == XFRM_STATE_DEAD)
414 if (x->km.state == XFRM_STATE_EXPIRED)
416 if (x->lft.hard_add_expires_seconds) {
417 long tmo = x->lft.hard_add_expires_seconds +
418 x->curlft.add_time - now;
424 if (x->lft.hard_use_expires_seconds) {
425 long tmo = x->lft.hard_use_expires_seconds +
426 (x->curlft.use_time ? : now) - now;
434 if (x->lft.soft_add_expires_seconds) {
435 long tmo = x->lft.soft_add_expires_seconds +
436 x->curlft.add_time - now;
442 if (x->lft.soft_use_expires_seconds) {
443 long tmo = x->lft.soft_use_expires_seconds +
444 (x->curlft.use_time ? : now) - now;
453 km_state_expired(x, 0, 0);
455 if (next != LONG_MAX){
456 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
462 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
463 x->km.state = XFRM_STATE_EXPIRED;
464 wake_up(&net->xfrm.km_waitq);
469 err = __xfrm_state_delete(x);
470 if (!err && x->id.spi)
471 km_state_expired(x, 1, 0);
473 xfrm_audit_state_delete(x, err ? 0 : 1,
474 audit_get_loginuid(current),
475 audit_get_sessionid(current), 0);
478 spin_unlock(&x->lock);
479 return HRTIMER_NORESTART;
482 static void xfrm_replay_timer_handler(unsigned long data);
484 struct xfrm_state *xfrm_state_alloc(struct net *net)
486 struct xfrm_state *x;
488 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
491 write_pnet(&x->xs_net, net);
492 atomic_set(&x->refcnt, 1);
493 atomic_set(&x->tunnel_users, 0);
494 INIT_LIST_HEAD(&x->km.all);
495 INIT_HLIST_NODE(&x->bydst);
496 INIT_HLIST_NODE(&x->bysrc);
497 INIT_HLIST_NODE(&x->byspi);
498 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
499 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
501 x->curlft.add_time = get_seconds();
502 x->lft.soft_byte_limit = XFRM_INF;
503 x->lft.soft_packet_limit = XFRM_INF;
504 x->lft.hard_byte_limit = XFRM_INF;
505 x->lft.hard_packet_limit = XFRM_INF;
506 x->replay_maxage = 0;
507 x->replay_maxdiff = 0;
508 x->inner_mode = NULL;
509 x->inner_mode_iaf = NULL;
510 spin_lock_init(&x->lock);
514 EXPORT_SYMBOL(xfrm_state_alloc);
516 void __xfrm_state_destroy(struct xfrm_state *x)
518 struct net *net = xs_net(x);
520 WARN_ON(x->km.state != XFRM_STATE_DEAD);
522 spin_lock_bh(&xfrm_state_gc_lock);
523 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
524 spin_unlock_bh(&xfrm_state_gc_lock);
525 schedule_work(&net->xfrm.state_gc_work);
527 EXPORT_SYMBOL(__xfrm_state_destroy);
529 int __xfrm_state_delete(struct xfrm_state *x)
531 struct net *net = xs_net(x);
534 if (x->km.state != XFRM_STATE_DEAD) {
535 x->km.state = XFRM_STATE_DEAD;
536 spin_lock(&xfrm_state_lock);
537 list_del(&x->km.all);
538 hlist_del(&x->bydst);
539 hlist_del(&x->bysrc);
541 hlist_del(&x->byspi);
542 net->xfrm.state_num--;
543 spin_unlock(&xfrm_state_lock);
545 /* All xfrm_state objects are created by xfrm_state_alloc.
546 * The xfrm_state_alloc call gives a reference, and that
547 * is what we are dropping here.
555 EXPORT_SYMBOL(__xfrm_state_delete);
557 int xfrm_state_delete(struct xfrm_state *x)
561 spin_lock_bh(&x->lock);
562 err = __xfrm_state_delete(x);
563 spin_unlock_bh(&x->lock);
567 EXPORT_SYMBOL(xfrm_state_delete);
569 #ifdef CONFIG_SECURITY_NETWORK_XFRM
571 xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
575 for (i = 0; i <= net->xfrm.state_hmask; i++) {
576 struct hlist_node *entry;
577 struct xfrm_state *x;
579 hlist_for_each_entry(x, entry, 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 hlist_node *entry;
613 struct xfrm_state *x;
615 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
616 if (!xfrm_state_kern(x) &&
617 xfrm_id_proto_match(x->id.proto, proto)) {
619 spin_unlock_bh(&xfrm_state_lock);
621 err = xfrm_state_delete(x);
622 xfrm_audit_state_delete(x, err ? 0 : 1,
623 audit_info->loginuid,
624 audit_info->sessionid,
630 spin_lock_bh(&xfrm_state_lock);
639 spin_unlock_bh(&xfrm_state_lock);
640 wake_up(&net->xfrm.km_waitq);
643 EXPORT_SYMBOL(xfrm_state_flush);
645 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
647 spin_lock_bh(&xfrm_state_lock);
648 si->sadcnt = net->xfrm.state_num;
649 si->sadhcnt = net->xfrm.state_hmask;
650 si->sadhmcnt = xfrm_state_hashmax;
651 spin_unlock_bh(&xfrm_state_lock);
653 EXPORT_SYMBOL(xfrm_sad_getinfo);
656 xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
657 const struct xfrm_tmpl *tmpl,
658 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
659 unsigned short family)
661 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
664 afinfo->init_tempsel(&x->sel, fl);
666 if (family != tmpl->encap_family) {
667 xfrm_state_put_afinfo(afinfo);
668 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
672 afinfo->init_temprop(x, tmpl, daddr, saddr);
673 xfrm_state_put_afinfo(afinfo);
677 static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
678 const xfrm_address_t *daddr,
679 __be32 spi, u8 proto,
680 unsigned short family)
682 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
683 struct xfrm_state *x;
684 struct hlist_node *entry;
686 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
687 if (x->props.family != family ||
689 x->id.proto != proto ||
690 xfrm_addr_cmp(&x->id.daddr, daddr, family))
693 if ((mark & x->mark.m) != x->mark.v)
702 static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
703 const xfrm_address_t *daddr,
704 const xfrm_address_t *saddr,
705 u8 proto, unsigned short family)
707 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
708 struct xfrm_state *x;
709 struct hlist_node *entry;
711 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
712 if (x->props.family != family ||
713 x->id.proto != proto ||
714 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
715 xfrm_addr_cmp(&x->props.saddr, saddr, family))
718 if ((mark & x->mark.m) != x->mark.v)
727 static inline struct xfrm_state *
728 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
730 struct net *net = xs_net(x);
731 u32 mark = x->mark.v & x->mark.m;
734 return __xfrm_state_lookup(net, mark, &x->id.daddr,
735 x->id.spi, x->id.proto, family);
737 return __xfrm_state_lookup_byaddr(net, mark,
740 x->id.proto, family);
743 static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
745 if (have_hash_collision &&
746 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
747 net->xfrm.state_num > net->xfrm.state_hmask)
748 schedule_work(&net->xfrm.state_hash_work);
751 static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
752 const struct flowi *fl, unsigned short family,
753 struct xfrm_state **best, int *acq_in_progress,
757 * 1. There is a valid state with matching selector. Done.
758 * 2. Valid state with inappropriate selector. Skip.
760 * Entering area of "sysdeps".
762 * 3. If state is not valid, selector is temporary, it selects
763 * only session which triggered previous resolution. Key
764 * manager will do something to install a state with proper
767 if (x->km.state == XFRM_STATE_VALID) {
768 if ((x->sel.family &&
769 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
770 !security_xfrm_state_pol_flow_match(x, pol, fl))
774 (*best)->km.dying > x->km.dying ||
775 ((*best)->km.dying == x->km.dying &&
776 (*best)->curlft.add_time < x->curlft.add_time))
778 } else if (x->km.state == XFRM_STATE_ACQ) {
779 *acq_in_progress = 1;
780 } else if (x->km.state == XFRM_STATE_ERROR ||
781 x->km.state == XFRM_STATE_EXPIRED) {
782 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
783 security_xfrm_state_pol_flow_match(x, pol, fl))
789 xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
790 const struct flowi *fl, struct xfrm_tmpl *tmpl,
791 struct xfrm_policy *pol, int *err,
792 unsigned short family)
794 static xfrm_address_t saddr_wildcard = { };
795 struct net *net = xp_net(pol);
796 unsigned int h, h_wildcard;
797 struct hlist_node *entry;
798 struct xfrm_state *x, *x0, *to_put;
799 int acquire_in_progress = 0;
801 struct xfrm_state *best = NULL;
802 u32 mark = pol->mark.v & pol->mark.m;
803 unsigned short encap_family = tmpl->encap_family;
807 spin_lock_bh(&xfrm_state_lock);
808 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
809 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
810 if (x->props.family == encap_family &&
811 x->props.reqid == tmpl->reqid &&
812 (mark & x->mark.m) == x->mark.v &&
813 !(x->props.flags & XFRM_STATE_WILDRECV) &&
814 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
815 tmpl->mode == x->props.mode &&
816 tmpl->id.proto == x->id.proto &&
817 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
818 xfrm_state_look_at(pol, x, fl, encap_family,
819 &best, &acquire_in_progress, &error);
824 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
825 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
826 if (x->props.family == encap_family &&
827 x->props.reqid == tmpl->reqid &&
828 (mark & x->mark.m) == x->mark.v &&
829 !(x->props.flags & XFRM_STATE_WILDRECV) &&
830 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
831 tmpl->mode == x->props.mode &&
832 tmpl->id.proto == x->id.proto &&
833 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
834 xfrm_state_look_at(pol, x, fl, encap_family,
835 &best, &acquire_in_progress, &error);
840 if (!x && !error && !acquire_in_progress) {
842 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
843 tmpl->id.proto, encap_family)) != NULL) {
848 x = xfrm_state_alloc(net);
853 /* Initialize temporary state matching only
854 * to current session. */
855 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
856 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
858 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
860 x->km.state = XFRM_STATE_DEAD;
866 if (km_query(x, tmpl, pol) == 0) {
867 x->km.state = XFRM_STATE_ACQ;
868 list_add(&x->km.all, &net->xfrm.state_all);
869 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
870 h = xfrm_src_hash(net, daddr, saddr, encap_family);
871 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
873 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
874 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
876 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
877 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
878 net->xfrm.state_num++;
879 xfrm_hash_grow_check(net, x->bydst.next != NULL);
881 x->km.state = XFRM_STATE_DEAD;
891 *err = acquire_in_progress ? -EAGAIN : error;
892 spin_unlock_bh(&xfrm_state_lock);
894 xfrm_state_put(to_put);
899 xfrm_stateonly_find(struct net *net, u32 mark,
900 xfrm_address_t *daddr, xfrm_address_t *saddr,
901 unsigned short family, u8 mode, u8 proto, u32 reqid)
904 struct xfrm_state *rx = NULL, *x = NULL;
905 struct hlist_node *entry;
907 spin_lock(&xfrm_state_lock);
908 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
909 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
910 if (x->props.family == family &&
911 x->props.reqid == reqid &&
912 (mark & x->mark.m) == x->mark.v &&
913 !(x->props.flags & XFRM_STATE_WILDRECV) &&
914 xfrm_state_addr_check(x, daddr, saddr, family) &&
915 mode == x->props.mode &&
916 proto == x->id.proto &&
917 x->km.state == XFRM_STATE_VALID) {
925 spin_unlock(&xfrm_state_lock);
930 EXPORT_SYMBOL(xfrm_stateonly_find);
932 static void __xfrm_state_insert(struct xfrm_state *x)
934 struct net *net = xs_net(x);
937 list_add(&x->km.all, &net->xfrm.state_all);
939 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
940 x->props.reqid, x->props.family);
941 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
943 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
944 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
947 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
950 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
953 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
954 if (x->replay_maxage)
955 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
957 wake_up(&net->xfrm.km_waitq);
959 net->xfrm.state_num++;
961 xfrm_hash_grow_check(net, x->bydst.next != NULL);
964 /* xfrm_state_lock is held */
965 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
967 struct net *net = xs_net(xnew);
968 unsigned short family = xnew->props.family;
969 u32 reqid = xnew->props.reqid;
970 struct xfrm_state *x;
971 struct hlist_node *entry;
973 u32 mark = xnew->mark.v & xnew->mark.m;
975 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
976 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
977 if (x->props.family == family &&
978 x->props.reqid == reqid &&
979 (mark & x->mark.m) == x->mark.v &&
980 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
981 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
986 void xfrm_state_insert(struct xfrm_state *x)
988 spin_lock_bh(&xfrm_state_lock);
989 __xfrm_state_bump_genids(x);
990 __xfrm_state_insert(x);
991 spin_unlock_bh(&xfrm_state_lock);
993 EXPORT_SYMBOL(xfrm_state_insert);
995 /* xfrm_state_lock is held */
996 static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m,
997 unsigned short family, u8 mode,
999 const xfrm_address_t *daddr,
1000 const xfrm_address_t *saddr, int create)
1002 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1003 struct hlist_node *entry;
1004 struct xfrm_state *x;
1005 u32 mark = m->v & m->m;
1007 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
1008 if (x->props.reqid != reqid ||
1009 x->props.mode != mode ||
1010 x->props.family != family ||
1011 x->km.state != XFRM_STATE_ACQ ||
1013 x->id.proto != proto ||
1014 (mark & x->mark.m) != x->mark.v ||
1015 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
1016 xfrm_addr_cmp(&x->props.saddr, saddr, family))
1026 x = xfrm_state_alloc(net);
1030 x->sel.daddr.a4 = daddr->a4;
1031 x->sel.saddr.a4 = saddr->a4;
1032 x->sel.prefixlen_d = 32;
1033 x->sel.prefixlen_s = 32;
1034 x->props.saddr.a4 = saddr->a4;
1035 x->id.daddr.a4 = daddr->a4;
1039 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1040 (const struct in6_addr *)daddr);
1041 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1042 (const struct in6_addr *)saddr);
1043 x->sel.prefixlen_d = 128;
1044 x->sel.prefixlen_s = 128;
1045 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1046 (const struct in6_addr *)saddr);
1047 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1048 (const struct in6_addr *)daddr);
1052 x->km.state = XFRM_STATE_ACQ;
1053 x->id.proto = proto;
1054 x->props.family = family;
1055 x->props.mode = mode;
1056 x->props.reqid = reqid;
1059 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1061 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
1062 list_add(&x->km.all, &net->xfrm.state_all);
1063 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1064 h = xfrm_src_hash(net, daddr, saddr, family);
1065 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1067 net->xfrm.state_num++;
1069 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1075 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1077 int xfrm_state_add(struct xfrm_state *x)
1079 struct net *net = xs_net(x);
1080 struct xfrm_state *x1, *to_put;
1083 u32 mark = x->mark.v & x->mark.m;
1084 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1086 family = x->props.family;
1090 spin_lock_bh(&xfrm_state_lock);
1092 x1 = __xfrm_state_locate(x, use_spi, family);
1100 if (use_spi && x->km.seq) {
1101 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
1102 if (x1 && ((x1->id.proto != x->id.proto) ||
1103 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
1110 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1111 x->props.reqid, x->id.proto,
1112 &x->id.daddr, &x->props.saddr, 0);
1114 __xfrm_state_bump_genids(x);
1115 __xfrm_state_insert(x);
1119 spin_unlock_bh(&xfrm_state_lock);
1122 xfrm_state_delete(x1);
1127 xfrm_state_put(to_put);
1131 EXPORT_SYMBOL(xfrm_state_add);
1133 #ifdef CONFIG_XFRM_MIGRATE
1134 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
1136 struct net *net = xs_net(orig);
1138 struct xfrm_state *x = xfrm_state_alloc(net);
1142 memcpy(&x->id, &orig->id, sizeof(x->id));
1143 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1144 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1145 x->props.mode = orig->props.mode;
1146 x->props.replay_window = orig->props.replay_window;
1147 x->props.reqid = orig->props.reqid;
1148 x->props.family = orig->props.family;
1149 x->props.saddr = orig->props.saddr;
1152 x->aalg = xfrm_algo_auth_clone(orig->aalg);
1156 x->props.aalgo = orig->props.aalgo;
1159 x->ealg = xfrm_algo_clone(orig->ealg);
1163 x->props.ealgo = orig->props.ealgo;
1166 x->calg = xfrm_algo_clone(orig->calg);
1170 x->props.calgo = orig->props.calgo;
1173 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1179 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1185 if (orig->replay_esn) {
1186 err = xfrm_replay_clone(x, orig);
1191 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1193 err = xfrm_init_state(x);
1197 x->props.flags = orig->props.flags;
1199 x->curlft.add_time = orig->curlft.add_time;
1200 x->km.state = orig->km.state;
1201 x->km.seq = orig->km.seq;
1213 /* xfrm_state_lock is held */
1214 struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1217 struct xfrm_state *x;
1218 struct hlist_node *entry;
1221 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
1222 m->reqid, m->old_family);
1223 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
1224 if (x->props.mode != m->mode ||
1225 x->id.proto != m->proto)
1227 if (m->reqid && x->props.reqid != m->reqid)
1229 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1231 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1238 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
1240 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
1241 if (x->props.mode != m->mode ||
1242 x->id.proto != m->proto)
1244 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1246 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1256 EXPORT_SYMBOL(xfrm_migrate_state_find);
1258 struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1259 struct xfrm_migrate *m)
1261 struct xfrm_state *xc;
1264 xc = xfrm_state_clone(x, &err);
1268 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1269 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1272 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1273 /* a care is needed when the destination address of the
1274 state is to be updated as it is a part of triplet */
1275 xfrm_state_insert(xc);
1277 if ((err = xfrm_state_add(xc)) < 0)
1286 EXPORT_SYMBOL(xfrm_state_migrate);
1289 int xfrm_state_update(struct xfrm_state *x)
1291 struct xfrm_state *x1, *to_put;
1293 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1297 spin_lock_bh(&xfrm_state_lock);
1298 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1304 if (xfrm_state_kern(x1)) {
1310 if (x1->km.state == XFRM_STATE_ACQ) {
1311 __xfrm_state_insert(x);
1317 spin_unlock_bh(&xfrm_state_lock);
1320 xfrm_state_put(to_put);
1326 xfrm_state_delete(x1);
1332 spin_lock_bh(&x1->lock);
1333 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1334 if (x->encap && x1->encap)
1335 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1336 if (x->coaddr && x1->coaddr) {
1337 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1339 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1340 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1341 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1344 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1345 if (x1->curlft.use_time)
1346 xfrm_state_check_expire(x1);
1349 x->km.state = XFRM_STATE_DEAD;
1350 __xfrm_state_put(x);
1352 spin_unlock_bh(&x1->lock);
1358 EXPORT_SYMBOL(xfrm_state_update);
1360 int xfrm_state_check_expire(struct xfrm_state *x)
1362 if (!x->curlft.use_time)
1363 x->curlft.use_time = get_seconds();
1365 if (x->km.state != XFRM_STATE_VALID)
1368 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1369 x->curlft.packets >= x->lft.hard_packet_limit) {
1370 x->km.state = XFRM_STATE_EXPIRED;
1371 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1376 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1377 x->curlft.packets >= x->lft.soft_packet_limit)) {
1379 km_state_expired(x, 0, 0);
1383 EXPORT_SYMBOL(xfrm_state_check_expire);
1386 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
1387 u8 proto, unsigned short family)
1389 struct xfrm_state *x;
1391 spin_lock_bh(&xfrm_state_lock);
1392 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1393 spin_unlock_bh(&xfrm_state_lock);
1396 EXPORT_SYMBOL(xfrm_state_lookup);
1399 xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1400 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1401 u8 proto, unsigned short family)
1403 struct xfrm_state *x;
1405 spin_lock_bh(&xfrm_state_lock);
1406 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
1407 spin_unlock_bh(&xfrm_state_lock);
1410 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1413 xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
1414 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1415 int create, unsigned short family)
1417 struct xfrm_state *x;
1419 spin_lock_bh(&xfrm_state_lock);
1420 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1421 spin_unlock_bh(&xfrm_state_lock);
1425 EXPORT_SYMBOL(xfrm_find_acq);
1427 #ifdef CONFIG_XFRM_SUB_POLICY
1429 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1430 unsigned short family)
1433 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1435 return -EAFNOSUPPORT;
1437 spin_lock_bh(&xfrm_state_lock);
1438 if (afinfo->tmpl_sort)
1439 err = afinfo->tmpl_sort(dst, src, n);
1440 spin_unlock_bh(&xfrm_state_lock);
1441 xfrm_state_put_afinfo(afinfo);
1444 EXPORT_SYMBOL(xfrm_tmpl_sort);
1447 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1448 unsigned short family)
1451 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1453 return -EAFNOSUPPORT;
1455 spin_lock_bh(&xfrm_state_lock);
1456 if (afinfo->state_sort)
1457 err = afinfo->state_sort(dst, src, n);
1458 spin_unlock_bh(&xfrm_state_lock);
1459 xfrm_state_put_afinfo(afinfo);
1462 EXPORT_SYMBOL(xfrm_state_sort);
1465 /* Silly enough, but I'm lazy to build resolution list */
1467 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1471 for (i = 0; i <= net->xfrm.state_hmask; i++) {
1472 struct hlist_node *entry;
1473 struct xfrm_state *x;
1475 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1476 if (x->km.seq == seq &&
1477 (mark & x->mark.m) == x->mark.v &&
1478 x->km.state == XFRM_STATE_ACQ) {
1487 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1489 struct xfrm_state *x;
1491 spin_lock_bh(&xfrm_state_lock);
1492 x = __xfrm_find_acq_byseq(net, mark, seq);
1493 spin_unlock_bh(&xfrm_state_lock);
1496 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1498 u32 xfrm_get_acqseq(void)
1501 static atomic_t acqseq;
1504 res = atomic_inc_return(&acqseq);
1509 EXPORT_SYMBOL(xfrm_get_acqseq);
1511 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1513 struct net *net = xs_net(x);
1515 struct xfrm_state *x0;
1517 __be32 minspi = htonl(low);
1518 __be32 maxspi = htonl(high);
1519 u32 mark = x->mark.v & x->mark.m;
1521 spin_lock_bh(&x->lock);
1522 if (x->km.state == XFRM_STATE_DEAD)
1531 if (minspi == maxspi) {
1532 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1540 for (h=0; h<high-low+1; h++) {
1541 spi = low + net_random()%(high-low+1);
1542 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1544 x->id.spi = htonl(spi);
1551 spin_lock_bh(&xfrm_state_lock);
1552 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1553 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1554 spin_unlock_bh(&xfrm_state_lock);
1560 spin_unlock_bh(&x->lock);
1564 EXPORT_SYMBOL(xfrm_alloc_spi);
1566 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1567 int (*func)(struct xfrm_state *, int, void*),
1570 struct xfrm_state *state;
1571 struct xfrm_state_walk *x;
1574 if (walk->seq != 0 && list_empty(&walk->all))
1577 spin_lock_bh(&xfrm_state_lock);
1578 if (list_empty(&walk->all))
1579 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
1581 x = list_entry(&walk->all, struct xfrm_state_walk, all);
1582 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
1583 if (x->state == XFRM_STATE_DEAD)
1585 state = container_of(x, struct xfrm_state, km);
1586 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
1588 err = func(state, walk->seq, data);
1590 list_move_tail(&walk->all, &x->all);
1595 if (walk->seq == 0) {
1599 list_del_init(&walk->all);
1601 spin_unlock_bh(&xfrm_state_lock);
1604 EXPORT_SYMBOL(xfrm_state_walk);
1606 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1608 INIT_LIST_HEAD(&walk->all);
1609 walk->proto = proto;
1610 walk->state = XFRM_STATE_DEAD;
1613 EXPORT_SYMBOL(xfrm_state_walk_init);
1615 void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1617 if (list_empty(&walk->all))
1620 spin_lock_bh(&xfrm_state_lock);
1621 list_del(&walk->all);
1622 spin_unlock_bh(&xfrm_state_lock);
1624 EXPORT_SYMBOL(xfrm_state_walk_done);
1626 static void xfrm_replay_timer_handler(unsigned long data)
1628 struct xfrm_state *x = (struct xfrm_state*)data;
1630 spin_lock(&x->lock);
1632 if (x->km.state == XFRM_STATE_VALID) {
1633 if (xfrm_aevent_is_on(xs_net(x)))
1634 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
1636 x->xflags |= XFRM_TIME_DEFER;
1639 spin_unlock(&x->lock);
1642 static LIST_HEAD(xfrm_km_list);
1643 static DEFINE_RWLOCK(xfrm_km_lock);
1645 void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1647 struct xfrm_mgr *km;
1649 read_lock(&xfrm_km_lock);
1650 list_for_each_entry(km, &xfrm_km_list, list)
1651 if (km->notify_policy)
1652 km->notify_policy(xp, dir, c);
1653 read_unlock(&xfrm_km_lock);
1656 void km_state_notify(struct xfrm_state *x, const struct km_event *c)
1658 struct xfrm_mgr *km;
1659 read_lock(&xfrm_km_lock);
1660 list_for_each_entry(km, &xfrm_km_list, list)
1663 read_unlock(&xfrm_km_lock);
1666 EXPORT_SYMBOL(km_policy_notify);
1667 EXPORT_SYMBOL(km_state_notify);
1669 void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
1671 struct net *net = xs_net(x);
1676 c.event = XFRM_MSG_EXPIRE;
1677 km_state_notify(x, &c);
1680 wake_up(&net->xfrm.km_waitq);
1683 EXPORT_SYMBOL(km_state_expired);
1685 * We send to all registered managers regardless of failure
1686 * We are happy with one success
1688 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1690 int err = -EINVAL, acqret;
1691 struct xfrm_mgr *km;
1693 read_lock(&xfrm_km_lock);
1694 list_for_each_entry(km, &xfrm_km_list, list) {
1695 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1699 read_unlock(&xfrm_km_lock);
1702 EXPORT_SYMBOL(km_query);
1704 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1707 struct xfrm_mgr *km;
1709 read_lock(&xfrm_km_lock);
1710 list_for_each_entry(km, &xfrm_km_list, list) {
1711 if (km->new_mapping)
1712 err = km->new_mapping(x, ipaddr, sport);
1716 read_unlock(&xfrm_km_lock);
1719 EXPORT_SYMBOL(km_new_mapping);
1721 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1723 struct net *net = xp_net(pol);
1728 c.event = XFRM_MSG_POLEXPIRE;
1729 km_policy_notify(pol, dir, &c);
1732 wake_up(&net->xfrm.km_waitq);
1734 EXPORT_SYMBOL(km_policy_expired);
1736 #ifdef CONFIG_XFRM_MIGRATE
1737 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1738 const struct xfrm_migrate *m, int num_migrate,
1739 const struct xfrm_kmaddress *k)
1743 struct xfrm_mgr *km;
1745 read_lock(&xfrm_km_lock);
1746 list_for_each_entry(km, &xfrm_km_list, list) {
1748 ret = km->migrate(sel, dir, type, m, num_migrate, k);
1753 read_unlock(&xfrm_km_lock);
1756 EXPORT_SYMBOL(km_migrate);
1759 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
1763 struct xfrm_mgr *km;
1765 read_lock(&xfrm_km_lock);
1766 list_for_each_entry(km, &xfrm_km_list, list) {
1768 ret = km->report(net, proto, sel, addr);
1773 read_unlock(&xfrm_km_lock);
1776 EXPORT_SYMBOL(km_report);
1778 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1782 struct xfrm_mgr *km;
1783 struct xfrm_policy *pol = NULL;
1785 if (optlen <= 0 || optlen > PAGE_SIZE)
1788 data = kmalloc(optlen, GFP_KERNEL);
1793 if (copy_from_user(data, optval, optlen))
1797 read_lock(&xfrm_km_lock);
1798 list_for_each_entry(km, &xfrm_km_list, list) {
1799 pol = km->compile_policy(sk, optname, data,
1804 read_unlock(&xfrm_km_lock);
1807 xfrm_sk_policy_insert(sk, err, pol);
1816 EXPORT_SYMBOL(xfrm_user_policy);
1818 int xfrm_register_km(struct xfrm_mgr *km)
1820 write_lock_bh(&xfrm_km_lock);
1821 list_add_tail(&km->list, &xfrm_km_list);
1822 write_unlock_bh(&xfrm_km_lock);
1825 EXPORT_SYMBOL(xfrm_register_km);
1827 int xfrm_unregister_km(struct xfrm_mgr *km)
1829 write_lock_bh(&xfrm_km_lock);
1830 list_del(&km->list);
1831 write_unlock_bh(&xfrm_km_lock);
1834 EXPORT_SYMBOL(xfrm_unregister_km);
1836 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1839 if (unlikely(afinfo == NULL))
1841 if (unlikely(afinfo->family >= NPROTO))
1842 return -EAFNOSUPPORT;
1843 write_lock_bh(&xfrm_state_afinfo_lock);
1844 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1847 xfrm_state_afinfo[afinfo->family] = afinfo;
1848 write_unlock_bh(&xfrm_state_afinfo_lock);
1851 EXPORT_SYMBOL(xfrm_state_register_afinfo);
1853 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1856 if (unlikely(afinfo == NULL))
1858 if (unlikely(afinfo->family >= NPROTO))
1859 return -EAFNOSUPPORT;
1860 write_lock_bh(&xfrm_state_afinfo_lock);
1861 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1862 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1865 xfrm_state_afinfo[afinfo->family] = NULL;
1867 write_unlock_bh(&xfrm_state_afinfo_lock);
1870 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1872 static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1874 struct xfrm_state_afinfo *afinfo;
1875 if (unlikely(family >= NPROTO))
1877 read_lock(&xfrm_state_afinfo_lock);
1878 afinfo = xfrm_state_afinfo[family];
1879 if (unlikely(!afinfo))
1880 read_unlock(&xfrm_state_afinfo_lock);
1884 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1885 __releases(xfrm_state_afinfo_lock)
1887 read_unlock(&xfrm_state_afinfo_lock);
1890 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1891 void xfrm_state_delete_tunnel(struct xfrm_state *x)
1894 struct xfrm_state *t = x->tunnel;
1896 if (atomic_read(&t->tunnel_users) == 2)
1897 xfrm_state_delete(t);
1898 atomic_dec(&t->tunnel_users);
1903 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1905 int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1909 spin_lock_bh(&x->lock);
1910 if (x->km.state == XFRM_STATE_VALID &&
1911 x->type && x->type->get_mtu)
1912 res = x->type->get_mtu(x, mtu);
1914 res = mtu - x->props.header_len;
1915 spin_unlock_bh(&x->lock);
1919 int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
1921 struct xfrm_state_afinfo *afinfo;
1922 struct xfrm_mode *inner_mode;
1923 int family = x->props.family;
1926 err = -EAFNOSUPPORT;
1927 afinfo = xfrm_state_get_afinfo(family);
1932 if (afinfo->init_flags)
1933 err = afinfo->init_flags(x);
1935 xfrm_state_put_afinfo(afinfo);
1940 err = -EPROTONOSUPPORT;
1942 if (x->sel.family != AF_UNSPEC) {
1943 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1944 if (inner_mode == NULL)
1947 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
1948 family != x->sel.family) {
1949 xfrm_put_mode(inner_mode);
1953 x->inner_mode = inner_mode;
1955 struct xfrm_mode *inner_mode_iaf;
1956 int iafamily = AF_INET;
1958 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
1959 if (inner_mode == NULL)
1962 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
1963 xfrm_put_mode(inner_mode);
1966 x->inner_mode = inner_mode;
1968 if (x->props.family == AF_INET)
1969 iafamily = AF_INET6;
1971 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
1972 if (inner_mode_iaf) {
1973 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
1974 x->inner_mode_iaf = inner_mode_iaf;
1976 xfrm_put_mode(inner_mode_iaf);
1980 x->type = xfrm_get_type(x->id.proto, family);
1981 if (x->type == NULL)
1984 err = x->type->init_state(x);
1988 x->outer_mode = xfrm_get_mode(x->props.mode, family);
1989 if (x->outer_mode == NULL)
1993 err = xfrm_init_replay(x);
1998 x->km.state = XFRM_STATE_VALID;
2004 EXPORT_SYMBOL(__xfrm_init_state);
2006 int xfrm_init_state(struct xfrm_state *x)
2008 return __xfrm_init_state(x, true);
2011 EXPORT_SYMBOL(xfrm_init_state);
2013 int __net_init xfrm_state_init(struct net *net)
2017 INIT_LIST_HEAD(&net->xfrm.state_all);
2019 sz = sizeof(struct hlist_head) * 8;
2021 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2022 if (!net->xfrm.state_bydst)
2024 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2025 if (!net->xfrm.state_bysrc)
2027 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2028 if (!net->xfrm.state_byspi)
2030 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2032 net->xfrm.state_num = 0;
2033 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
2034 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
2035 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
2036 init_waitqueue_head(&net->xfrm.km_waitq);
2040 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2042 xfrm_hash_free(net->xfrm.state_bydst, sz);
2047 void xfrm_state_fini(struct net *net)
2049 struct xfrm_audit audit_info;
2052 flush_work(&net->xfrm.state_hash_work);
2053 audit_info.loginuid = -1;
2054 audit_info.sessionid = -1;
2055 audit_info.secid = 0;
2056 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2057 flush_work(&net->xfrm.state_gc_work);
2059 WARN_ON(!list_empty(&net->xfrm.state_all));
2061 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
2062 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2063 xfrm_hash_free(net->xfrm.state_byspi, sz);
2064 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2065 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2066 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2067 xfrm_hash_free(net->xfrm.state_bydst, sz);
2070 #ifdef CONFIG_AUDITSYSCALL
2071 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2072 struct audit_buffer *audit_buf)
2074 struct xfrm_sec_ctx *ctx = x->security;
2075 u32 spi = ntohl(x->id.spi);
2078 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2079 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2081 switch(x->props.family) {
2083 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2084 &x->props.saddr.a4, &x->id.daddr.a4);
2087 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
2088 x->props.saddr.a6, x->id.daddr.a6);
2092 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2095 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2096 struct audit_buffer *audit_buf)
2098 const struct iphdr *iph4;
2099 const struct ipv6hdr *iph6;
2104 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2105 &iph4->saddr, &iph4->daddr);
2108 iph6 = ipv6_hdr(skb);
2109 audit_log_format(audit_buf,
2110 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2111 &iph6->saddr,&iph6->daddr,
2112 iph6->flow_lbl[0] & 0x0f,
2119 void xfrm_audit_state_add(struct xfrm_state *x, int result,
2120 uid_t auid, u32 sessionid, u32 secid)
2122 struct audit_buffer *audit_buf;
2124 audit_buf = xfrm_audit_start("SAD-add");
2125 if (audit_buf == NULL)
2127 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2128 xfrm_audit_helper_sainfo(x, audit_buf);
2129 audit_log_format(audit_buf, " res=%u", result);
2130 audit_log_end(audit_buf);
2132 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2134 void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2135 uid_t auid, u32 sessionid, u32 secid)
2137 struct audit_buffer *audit_buf;
2139 audit_buf = xfrm_audit_start("SAD-delete");
2140 if (audit_buf == NULL)
2142 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2143 xfrm_audit_helper_sainfo(x, audit_buf);
2144 audit_log_format(audit_buf, " res=%u", result);
2145 audit_log_end(audit_buf);
2147 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2149 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2150 struct sk_buff *skb)
2152 struct audit_buffer *audit_buf;
2155 audit_buf = xfrm_audit_start("SA-replay-overflow");
2156 if (audit_buf == NULL)
2158 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2159 /* don't record the sequence number because it's inherent in this kind
2160 * of audit message */
2161 spi = ntohl(x->id.spi);
2162 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2163 audit_log_end(audit_buf);
2165 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2167 void xfrm_audit_state_replay(struct xfrm_state *x,
2168 struct sk_buff *skb, __be32 net_seq)
2170 struct audit_buffer *audit_buf;
2173 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2174 if (audit_buf == NULL)
2176 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2177 spi = ntohl(x->id.spi);
2178 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2179 spi, spi, ntohl(net_seq));
2180 audit_log_end(audit_buf);
2182 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
2184 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2186 struct audit_buffer *audit_buf;
2188 audit_buf = xfrm_audit_start("SA-notfound");
2189 if (audit_buf == NULL)
2191 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2192 audit_log_end(audit_buf);
2194 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2196 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2197 __be32 net_spi, __be32 net_seq)
2199 struct audit_buffer *audit_buf;
2202 audit_buf = xfrm_audit_start("SA-notfound");
2203 if (audit_buf == NULL)
2205 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2206 spi = ntohl(net_spi);
2207 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2208 spi, spi, ntohl(net_seq));
2209 audit_log_end(audit_buf);
2211 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2213 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2214 struct sk_buff *skb, u8 proto)
2216 struct audit_buffer *audit_buf;
2220 audit_buf = xfrm_audit_start("SA-icv-failure");
2221 if (audit_buf == NULL)
2223 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2224 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2225 u32 spi = ntohl(net_spi);
2226 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2227 spi, spi, ntohl(net_seq));
2229 audit_log_end(audit_buf);
2231 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2232 #endif /* CONFIG_AUDITSYSCALL */