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 unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
40 static inline unsigned int xfrm_dst_hash(struct net *net,
41 const xfrm_address_t *daddr,
42 const xfrm_address_t *saddr,
44 unsigned short family)
46 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
49 static inline unsigned int xfrm_src_hash(struct net *net,
50 const xfrm_address_t *daddr,
51 const xfrm_address_t *saddr,
52 unsigned short family)
54 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
57 static inline unsigned int
58 xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
59 __be32 spi, u8 proto, unsigned short family)
61 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
64 static void xfrm_hash_transfer(struct hlist_head *list,
65 struct hlist_head *ndsttable,
66 struct hlist_head *nsrctable,
67 struct hlist_head *nspitable,
68 unsigned int nhashmask)
70 struct hlist_node *tmp;
73 hlist_for_each_entry_safe(x, tmp, list, bydst) {
76 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
77 x->props.reqid, x->props.family,
79 hlist_add_head(&x->bydst, ndsttable+h);
81 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
84 hlist_add_head(&x->bysrc, nsrctable+h);
87 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
88 x->id.proto, x->props.family,
90 hlist_add_head(&x->byspi, nspitable+h);
95 static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
97 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
100 static DEFINE_MUTEX(hash_resize_mutex);
102 static void xfrm_hash_resize(struct work_struct *work)
104 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
105 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
106 unsigned long nsize, osize;
107 unsigned int nhashmask, ohashmask;
110 mutex_lock(&hash_resize_mutex);
112 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
113 ndst = xfrm_hash_alloc(nsize);
116 nsrc = xfrm_hash_alloc(nsize);
118 xfrm_hash_free(ndst, nsize);
121 nspi = xfrm_hash_alloc(nsize);
123 xfrm_hash_free(ndst, nsize);
124 xfrm_hash_free(nsrc, nsize);
128 spin_lock_bh(&net->xfrm.xfrm_state_lock);
130 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
131 for (i = net->xfrm.state_hmask; i >= 0; i--)
132 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
135 odst = net->xfrm.state_bydst;
136 osrc = net->xfrm.state_bysrc;
137 ospi = net->xfrm.state_byspi;
138 ohashmask = net->xfrm.state_hmask;
140 net->xfrm.state_bydst = ndst;
141 net->xfrm.state_bysrc = nsrc;
142 net->xfrm.state_byspi = nspi;
143 net->xfrm.state_hmask = nhashmask;
145 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
147 osize = (ohashmask + 1) * sizeof(struct hlist_head);
148 xfrm_hash_free(odst, osize);
149 xfrm_hash_free(osrc, osize);
150 xfrm_hash_free(ospi, osize);
153 mutex_unlock(&hash_resize_mutex);
156 static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
157 static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
159 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
161 int __xfrm_state_delete(struct xfrm_state *x);
163 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
164 bool km_is_alive(const struct km_event *c);
165 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
167 static DEFINE_SPINLOCK(xfrm_type_lock);
168 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
170 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
171 const struct xfrm_type **typemap;
174 if (unlikely(afinfo == NULL))
175 return -EAFNOSUPPORT;
176 typemap = afinfo->type_map;
177 spin_lock_bh(&xfrm_type_lock);
179 if (likely(typemap[type->proto] == NULL))
180 typemap[type->proto] = type;
183 spin_unlock_bh(&xfrm_type_lock);
184 xfrm_state_put_afinfo(afinfo);
187 EXPORT_SYMBOL(xfrm_register_type);
189 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
191 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
192 const struct xfrm_type **typemap;
195 if (unlikely(afinfo == NULL))
196 return -EAFNOSUPPORT;
197 typemap = afinfo->type_map;
198 spin_lock_bh(&xfrm_type_lock);
200 if (unlikely(typemap[type->proto] != type))
203 typemap[type->proto] = NULL;
204 spin_unlock_bh(&xfrm_type_lock);
205 xfrm_state_put_afinfo(afinfo);
208 EXPORT_SYMBOL(xfrm_unregister_type);
210 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
212 struct xfrm_state_afinfo *afinfo;
213 const struct xfrm_type **typemap;
214 const struct xfrm_type *type;
215 int modload_attempted = 0;
218 afinfo = xfrm_state_get_afinfo(family);
219 if (unlikely(afinfo == NULL))
221 typemap = afinfo->type_map;
223 type = typemap[proto];
224 if (unlikely(type && !try_module_get(type->owner)))
226 if (!type && !modload_attempted) {
227 xfrm_state_put_afinfo(afinfo);
228 request_module("xfrm-type-%d-%d", family, proto);
229 modload_attempted = 1;
233 xfrm_state_put_afinfo(afinfo);
237 static void xfrm_put_type(const struct xfrm_type *type)
239 module_put(type->owner);
242 static DEFINE_SPINLOCK(xfrm_mode_lock);
243 int xfrm_register_mode(struct xfrm_mode *mode, int family)
245 struct xfrm_state_afinfo *afinfo;
246 struct xfrm_mode **modemap;
249 if (unlikely(mode->encap >= XFRM_MODE_MAX))
252 afinfo = xfrm_state_get_afinfo(family);
253 if (unlikely(afinfo == NULL))
254 return -EAFNOSUPPORT;
257 modemap = afinfo->mode_map;
258 spin_lock_bh(&xfrm_mode_lock);
259 if (modemap[mode->encap])
263 if (!try_module_get(afinfo->owner))
266 mode->afinfo = afinfo;
267 modemap[mode->encap] = mode;
271 spin_unlock_bh(&xfrm_mode_lock);
272 xfrm_state_put_afinfo(afinfo);
275 EXPORT_SYMBOL(xfrm_register_mode);
277 int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
279 struct xfrm_state_afinfo *afinfo;
280 struct xfrm_mode **modemap;
283 if (unlikely(mode->encap >= XFRM_MODE_MAX))
286 afinfo = xfrm_state_get_afinfo(family);
287 if (unlikely(afinfo == NULL))
288 return -EAFNOSUPPORT;
291 modemap = afinfo->mode_map;
292 spin_lock_bh(&xfrm_mode_lock);
293 if (likely(modemap[mode->encap] == mode)) {
294 modemap[mode->encap] = NULL;
295 module_put(mode->afinfo->owner);
299 spin_unlock_bh(&xfrm_mode_lock);
300 xfrm_state_put_afinfo(afinfo);
303 EXPORT_SYMBOL(xfrm_unregister_mode);
305 static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
307 struct xfrm_state_afinfo *afinfo;
308 struct xfrm_mode *mode;
309 int modload_attempted = 0;
311 if (unlikely(encap >= XFRM_MODE_MAX))
315 afinfo = xfrm_state_get_afinfo(family);
316 if (unlikely(afinfo == NULL))
319 mode = afinfo->mode_map[encap];
320 if (unlikely(mode && !try_module_get(mode->owner)))
322 if (!mode && !modload_attempted) {
323 xfrm_state_put_afinfo(afinfo);
324 request_module("xfrm-mode-%d-%d", family, encap);
325 modload_attempted = 1;
329 xfrm_state_put_afinfo(afinfo);
333 static void xfrm_put_mode(struct xfrm_mode *mode)
335 module_put(mode->owner);
338 static void xfrm_state_gc_destroy(struct xfrm_state *x)
340 tasklet_hrtimer_cancel(&x->mtimer);
341 del_timer_sync(&x->rtimer);
347 kfree(x->replay_esn);
348 kfree(x->preplay_esn);
350 xfrm_put_mode(x->inner_mode);
351 if (x->inner_mode_iaf)
352 xfrm_put_mode(x->inner_mode_iaf);
354 xfrm_put_mode(x->outer_mode);
356 x->type->destructor(x);
357 xfrm_put_type(x->type);
359 security_xfrm_state_free(x);
363 static void xfrm_state_gc_task(struct work_struct *work)
365 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
366 struct xfrm_state *x;
367 struct hlist_node *tmp;
368 struct hlist_head gc_list;
370 spin_lock_bh(&xfrm_state_gc_lock);
371 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
372 spin_unlock_bh(&xfrm_state_gc_lock);
374 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
375 xfrm_state_gc_destroy(x);
378 static inline unsigned long make_jiffies(long secs)
380 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
381 return MAX_SCHEDULE_TIMEOUT-1;
386 static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
388 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
389 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
390 unsigned long now = get_seconds();
391 long next = LONG_MAX;
396 if (x->km.state == XFRM_STATE_DEAD)
398 if (x->km.state == XFRM_STATE_EXPIRED)
400 if (x->lft.hard_add_expires_seconds) {
401 long tmo = x->lft.hard_add_expires_seconds +
402 x->curlft.add_time - now;
404 if (x->xflags & XFRM_SOFT_EXPIRE) {
405 /* enter hard expire without soft expire first?!
406 * setting a new date could trigger this.
407 * workarbound: fix x->curflt.add_time by below:
409 x->curlft.add_time = now - x->saved_tmo - 1;
410 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
417 if (x->lft.hard_use_expires_seconds) {
418 long tmo = x->lft.hard_use_expires_seconds +
419 (x->curlft.use_time ? : now) - now;
427 if (x->lft.soft_add_expires_seconds) {
428 long tmo = x->lft.soft_add_expires_seconds +
429 x->curlft.add_time - now;
432 x->xflags &= ~XFRM_SOFT_EXPIRE;
433 } else if (tmo < next) {
435 x->xflags |= XFRM_SOFT_EXPIRE;
439 if (x->lft.soft_use_expires_seconds) {
440 long tmo = x->lft.soft_use_expires_seconds +
441 (x->curlft.use_time ? : now) - now;
450 km_state_expired(x, 0, 0);
452 if (next != LONG_MAX) {
453 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
459 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
460 x->km.state = XFRM_STATE_EXPIRED;
462 err = __xfrm_state_delete(x);
464 km_state_expired(x, 1, 0);
466 xfrm_audit_state_delete(x, err ? 0 : 1, true);
469 spin_unlock(&x->lock);
470 return HRTIMER_NORESTART;
473 static void xfrm_replay_timer_handler(unsigned long data);
475 struct xfrm_state *xfrm_state_alloc(struct net *net)
477 struct xfrm_state *x;
479 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
482 write_pnet(&x->xs_net, net);
483 atomic_set(&x->refcnt, 1);
484 atomic_set(&x->tunnel_users, 0);
485 INIT_LIST_HEAD(&x->km.all);
486 INIT_HLIST_NODE(&x->bydst);
487 INIT_HLIST_NODE(&x->bysrc);
488 INIT_HLIST_NODE(&x->byspi);
489 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
490 CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
491 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
493 x->curlft.add_time = get_seconds();
494 x->lft.soft_byte_limit = XFRM_INF;
495 x->lft.soft_packet_limit = XFRM_INF;
496 x->lft.hard_byte_limit = XFRM_INF;
497 x->lft.hard_packet_limit = XFRM_INF;
498 x->replay_maxage = 0;
499 x->replay_maxdiff = 0;
500 x->inner_mode = NULL;
501 x->inner_mode_iaf = NULL;
502 spin_lock_init(&x->lock);
506 EXPORT_SYMBOL(xfrm_state_alloc);
508 void __xfrm_state_destroy(struct xfrm_state *x)
510 struct net *net = xs_net(x);
512 WARN_ON(x->km.state != XFRM_STATE_DEAD);
514 spin_lock_bh(&xfrm_state_gc_lock);
515 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
516 spin_unlock_bh(&xfrm_state_gc_lock);
517 schedule_work(&net->xfrm.state_gc_work);
519 EXPORT_SYMBOL(__xfrm_state_destroy);
521 int __xfrm_state_delete(struct xfrm_state *x)
523 struct net *net = xs_net(x);
526 if (x->km.state != XFRM_STATE_DEAD) {
527 x->km.state = XFRM_STATE_DEAD;
528 spin_lock(&net->xfrm.xfrm_state_lock);
529 list_del(&x->km.all);
530 hlist_del(&x->bydst);
531 hlist_del(&x->bysrc);
533 hlist_del(&x->byspi);
534 net->xfrm.state_num--;
535 spin_unlock(&net->xfrm.xfrm_state_lock);
537 /* All xfrm_state objects are created by xfrm_state_alloc.
538 * The xfrm_state_alloc call gives a reference, and that
539 * is what we are dropping here.
547 EXPORT_SYMBOL(__xfrm_state_delete);
549 int xfrm_state_delete(struct xfrm_state *x)
553 spin_lock_bh(&x->lock);
554 err = __xfrm_state_delete(x);
555 spin_unlock_bh(&x->lock);
559 EXPORT_SYMBOL(xfrm_state_delete);
561 #ifdef CONFIG_SECURITY_NETWORK_XFRM
563 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
567 for (i = 0; i <= net->xfrm.state_hmask; i++) {
568 struct xfrm_state *x;
570 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
571 if (xfrm_id_proto_match(x->id.proto, proto) &&
572 (err = security_xfrm_state_delete(x)) != 0) {
573 xfrm_audit_state_delete(x, 0, task_valid);
583 xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
589 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid)
591 int i, err = 0, cnt = 0;
593 spin_lock_bh(&net->xfrm.xfrm_state_lock);
594 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
599 for (i = 0; i <= net->xfrm.state_hmask; i++) {
600 struct xfrm_state *x;
602 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
603 if (!xfrm_state_kern(x) &&
604 xfrm_id_proto_match(x->id.proto, proto)) {
606 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
608 err = xfrm_state_delete(x);
609 xfrm_audit_state_delete(x, err ? 0 : 1,
615 spin_lock_bh(&net->xfrm.xfrm_state_lock);
624 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
627 EXPORT_SYMBOL(xfrm_state_flush);
629 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
631 spin_lock_bh(&net->xfrm.xfrm_state_lock);
632 si->sadcnt = net->xfrm.state_num;
633 si->sadhcnt = net->xfrm.state_hmask;
634 si->sadhmcnt = xfrm_state_hashmax;
635 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
637 EXPORT_SYMBOL(xfrm_sad_getinfo);
640 xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
641 const struct xfrm_tmpl *tmpl,
642 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
643 unsigned short family)
645 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
648 afinfo->init_tempsel(&x->sel, fl);
650 if (family != tmpl->encap_family) {
651 xfrm_state_put_afinfo(afinfo);
652 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
656 afinfo->init_temprop(x, tmpl, daddr, saddr);
657 xfrm_state_put_afinfo(afinfo);
661 static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
662 const xfrm_address_t *daddr,
663 __be32 spi, u8 proto,
664 unsigned short family)
666 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
667 struct xfrm_state *x;
669 hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) {
670 if (x->props.family != family ||
672 x->id.proto != proto ||
673 !xfrm_addr_equal(&x->id.daddr, daddr, family))
676 if ((mark & x->mark.m) != x->mark.v)
685 static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
686 const xfrm_address_t *daddr,
687 const xfrm_address_t *saddr,
688 u8 proto, unsigned short family)
690 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
691 struct xfrm_state *x;
693 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
694 if (x->props.family != family ||
695 x->id.proto != proto ||
696 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
697 !xfrm_addr_equal(&x->props.saddr, saddr, family))
700 if ((mark & x->mark.m) != x->mark.v)
709 static inline struct xfrm_state *
710 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
712 struct net *net = xs_net(x);
713 u32 mark = x->mark.v & x->mark.m;
716 return __xfrm_state_lookup(net, mark, &x->id.daddr,
717 x->id.spi, x->id.proto, family);
719 return __xfrm_state_lookup_byaddr(net, mark,
722 x->id.proto, family);
725 static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
727 if (have_hash_collision &&
728 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
729 net->xfrm.state_num > net->xfrm.state_hmask)
730 schedule_work(&net->xfrm.state_hash_work);
733 static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
734 const struct flowi *fl, unsigned short family,
735 struct xfrm_state **best, int *acq_in_progress,
739 * 1. There is a valid state with matching selector. Done.
740 * 2. Valid state with inappropriate selector. Skip.
742 * Entering area of "sysdeps".
744 * 3. If state is not valid, selector is temporary, it selects
745 * only session which triggered previous resolution. Key
746 * manager will do something to install a state with proper
749 if (x->km.state == XFRM_STATE_VALID) {
750 if ((x->sel.family &&
751 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
752 !security_xfrm_state_pol_flow_match(x, pol, fl))
756 (*best)->km.dying > x->km.dying ||
757 ((*best)->km.dying == x->km.dying &&
758 (*best)->curlft.add_time < x->curlft.add_time))
760 } else if (x->km.state == XFRM_STATE_ACQ) {
761 *acq_in_progress = 1;
762 } else if (x->km.state == XFRM_STATE_ERROR ||
763 x->km.state == XFRM_STATE_EXPIRED) {
764 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
765 security_xfrm_state_pol_flow_match(x, pol, fl))
771 xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
772 const struct flowi *fl, struct xfrm_tmpl *tmpl,
773 struct xfrm_policy *pol, int *err,
774 unsigned short family)
776 static xfrm_address_t saddr_wildcard = { };
777 struct net *net = xp_net(pol);
778 unsigned int h, h_wildcard;
779 struct xfrm_state *x, *x0, *to_put;
780 int acquire_in_progress = 0;
782 struct xfrm_state *best = NULL;
783 u32 mark = pol->mark.v & pol->mark.m;
784 unsigned short encap_family = tmpl->encap_family;
789 spin_lock_bh(&net->xfrm.xfrm_state_lock);
790 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
791 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
792 if (x->props.family == encap_family &&
793 x->props.reqid == tmpl->reqid &&
794 (mark & x->mark.m) == x->mark.v &&
795 !(x->props.flags & XFRM_STATE_WILDRECV) &&
796 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
797 tmpl->mode == x->props.mode &&
798 tmpl->id.proto == x->id.proto &&
799 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
800 xfrm_state_look_at(pol, x, fl, encap_family,
801 &best, &acquire_in_progress, &error);
803 if (best || acquire_in_progress)
806 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
807 hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) {
808 if (x->props.family == encap_family &&
809 x->props.reqid == tmpl->reqid &&
810 (mark & x->mark.m) == x->mark.v &&
811 !(x->props.flags & XFRM_STATE_WILDRECV) &&
812 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
813 tmpl->mode == x->props.mode &&
814 tmpl->id.proto == x->id.proto &&
815 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
816 xfrm_state_look_at(pol, x, fl, encap_family,
817 &best, &acquire_in_progress, &error);
822 if (!x && !error && !acquire_in_progress) {
824 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
825 tmpl->id.proto, encap_family)) != NULL) {
832 /* If the KMs have no listeners (yet...), avoid allocating an SA
833 * for each and every packet - garbage collection might not
836 if (!km_is_alive(&c)) {
841 x = xfrm_state_alloc(net);
846 /* Initialize temporary state matching only
847 * to current session. */
848 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
849 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
851 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
853 x->km.state = XFRM_STATE_DEAD;
859 if (km_query(x, tmpl, pol) == 0) {
860 x->km.state = XFRM_STATE_ACQ;
861 list_add(&x->km.all, &net->xfrm.state_all);
862 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
863 h = xfrm_src_hash(net, daddr, saddr, encap_family);
864 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
866 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
867 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
869 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
870 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
871 net->xfrm.state_num++;
872 xfrm_hash_grow_check(net, x->bydst.next != NULL);
874 x->km.state = XFRM_STATE_DEAD;
884 *err = acquire_in_progress ? -EAGAIN : error;
885 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
887 xfrm_state_put(to_put);
892 xfrm_stateonly_find(struct net *net, u32 mark,
893 xfrm_address_t *daddr, xfrm_address_t *saddr,
894 unsigned short family, u8 mode, u8 proto, u32 reqid)
897 struct xfrm_state *rx = NULL, *x = NULL;
899 spin_lock_bh(&net->xfrm.xfrm_state_lock);
900 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
901 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
902 if (x->props.family == family &&
903 x->props.reqid == reqid &&
904 (mark & x->mark.m) == x->mark.v &&
905 !(x->props.flags & XFRM_STATE_WILDRECV) &&
906 xfrm_state_addr_check(x, daddr, saddr, family) &&
907 mode == x->props.mode &&
908 proto == x->id.proto &&
909 x->km.state == XFRM_STATE_VALID) {
917 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
922 EXPORT_SYMBOL(xfrm_stateonly_find);
924 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
925 unsigned short family)
927 struct xfrm_state *x;
928 struct xfrm_state_walk *w;
930 spin_lock_bh(&net->xfrm.xfrm_state_lock);
931 list_for_each_entry(w, &net->xfrm.state_all, all) {
932 x = container_of(w, struct xfrm_state, km);
933 if (x->props.family != family ||
937 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
941 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
944 EXPORT_SYMBOL(xfrm_state_lookup_byspi);
946 static void __xfrm_state_insert(struct xfrm_state *x)
948 struct net *net = xs_net(x);
951 list_add(&x->km.all, &net->xfrm.state_all);
953 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
954 x->props.reqid, x->props.family);
955 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
957 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
958 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
961 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
964 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
967 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
968 if (x->replay_maxage)
969 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
971 net->xfrm.state_num++;
973 xfrm_hash_grow_check(net, x->bydst.next != NULL);
976 /* net->xfrm.xfrm_state_lock is held */
977 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
979 struct net *net = xs_net(xnew);
980 unsigned short family = xnew->props.family;
981 u32 reqid = xnew->props.reqid;
982 struct xfrm_state *x;
984 u32 mark = xnew->mark.v & xnew->mark.m;
986 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
987 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
988 if (x->props.family == family &&
989 x->props.reqid == reqid &&
990 (mark & x->mark.m) == x->mark.v &&
991 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
992 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
997 void xfrm_state_insert(struct xfrm_state *x)
999 struct net *net = xs_net(x);
1001 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1002 __xfrm_state_bump_genids(x);
1003 __xfrm_state_insert(x);
1004 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1006 EXPORT_SYMBOL(xfrm_state_insert);
1008 /* net->xfrm.xfrm_state_lock is held */
1009 static struct xfrm_state *__find_acq_core(struct net *net,
1010 const struct xfrm_mark *m,
1011 unsigned short family, u8 mode,
1012 u32 reqid, u8 proto,
1013 const xfrm_address_t *daddr,
1014 const xfrm_address_t *saddr,
1017 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
1018 struct xfrm_state *x;
1019 u32 mark = m->v & m->m;
1021 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1022 if (x->props.reqid != reqid ||
1023 x->props.mode != mode ||
1024 x->props.family != family ||
1025 x->km.state != XFRM_STATE_ACQ ||
1027 x->id.proto != proto ||
1028 (mark & x->mark.m) != x->mark.v ||
1029 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1030 !xfrm_addr_equal(&x->props.saddr, saddr, family))
1040 x = xfrm_state_alloc(net);
1044 x->sel.daddr.a4 = daddr->a4;
1045 x->sel.saddr.a4 = saddr->a4;
1046 x->sel.prefixlen_d = 32;
1047 x->sel.prefixlen_s = 32;
1048 x->props.saddr.a4 = saddr->a4;
1049 x->id.daddr.a4 = daddr->a4;
1053 *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
1054 *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
1055 x->sel.prefixlen_d = 128;
1056 x->sel.prefixlen_s = 128;
1057 *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
1058 *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
1062 x->km.state = XFRM_STATE_ACQ;
1063 x->id.proto = proto;
1064 x->props.family = family;
1065 x->props.mode = mode;
1066 x->props.reqid = reqid;
1069 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
1071 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
1072 list_add(&x->km.all, &net->xfrm.state_all);
1073 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1074 h = xfrm_src_hash(net, daddr, saddr, family);
1075 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1077 net->xfrm.state_num++;
1079 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1085 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1087 int xfrm_state_add(struct xfrm_state *x)
1089 struct net *net = xs_net(x);
1090 struct xfrm_state *x1, *to_put;
1093 u32 mark = x->mark.v & x->mark.m;
1094 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1096 family = x->props.family;
1100 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1102 x1 = __xfrm_state_locate(x, use_spi, family);
1110 if (use_spi && x->km.seq) {
1111 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
1112 if (x1 && ((x1->id.proto != x->id.proto) ||
1113 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
1120 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1121 x->props.reqid, x->id.proto,
1122 &x->id.daddr, &x->props.saddr, 0);
1124 __xfrm_state_bump_genids(x);
1125 __xfrm_state_insert(x);
1129 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1132 xfrm_state_delete(x1);
1137 xfrm_state_put(to_put);
1141 EXPORT_SYMBOL(xfrm_state_add);
1143 #ifdef CONFIG_XFRM_MIGRATE
1144 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig)
1146 struct net *net = xs_net(orig);
1147 struct xfrm_state *x = xfrm_state_alloc(net);
1151 memcpy(&x->id, &orig->id, sizeof(x->id));
1152 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1153 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1154 x->props.mode = orig->props.mode;
1155 x->props.replay_window = orig->props.replay_window;
1156 x->props.reqid = orig->props.reqid;
1157 x->props.family = orig->props.family;
1158 x->props.saddr = orig->props.saddr;
1161 x->aalg = xfrm_algo_auth_clone(orig->aalg);
1165 x->props.aalgo = orig->props.aalgo;
1168 x->aead = xfrm_algo_aead_clone(orig->aead);
1173 x->ealg = xfrm_algo_clone(orig->ealg);
1177 x->props.ealgo = orig->props.ealgo;
1180 x->calg = xfrm_algo_clone(orig->calg);
1184 x->props.calgo = orig->props.calgo;
1187 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1193 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1199 if (orig->replay_esn) {
1200 if (xfrm_replay_clone(x, orig))
1204 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1206 if (xfrm_init_state(x) < 0)
1209 x->props.flags = orig->props.flags;
1210 x->props.extra_flags = orig->props.extra_flags;
1212 x->tfcpad = orig->tfcpad;
1213 x->replay_maxdiff = orig->replay_maxdiff;
1214 x->replay_maxage = orig->replay_maxage;
1215 x->curlft.add_time = orig->curlft.add_time;
1216 x->km.state = orig->km.state;
1217 x->km.seq = orig->km.seq;
1227 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
1230 struct xfrm_state *x = NULL;
1232 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1235 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
1236 m->reqid, m->old_family);
1237 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
1238 if (x->props.mode != m->mode ||
1239 x->id.proto != m->proto)
1241 if (m->reqid && x->props.reqid != m->reqid)
1243 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1245 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1252 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
1254 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
1255 if (x->props.mode != m->mode ||
1256 x->id.proto != m->proto)
1258 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1260 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1268 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1272 EXPORT_SYMBOL(xfrm_migrate_state_find);
1274 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1275 struct xfrm_migrate *m)
1277 struct xfrm_state *xc;
1279 xc = xfrm_state_clone(x);
1283 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1284 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1287 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
1288 /* a care is needed when the destination address of the
1289 state is to be updated as it is a part of triplet */
1290 xfrm_state_insert(xc);
1292 if (xfrm_state_add(xc) < 0)
1301 EXPORT_SYMBOL(xfrm_state_migrate);
1304 int xfrm_state_update(struct xfrm_state *x)
1306 struct xfrm_state *x1, *to_put;
1308 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1309 struct net *net = xs_net(x);
1313 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1314 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1320 if (xfrm_state_kern(x1)) {
1326 if (x1->km.state == XFRM_STATE_ACQ) {
1327 __xfrm_state_insert(x);
1333 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1336 xfrm_state_put(to_put);
1342 xfrm_state_delete(x1);
1348 spin_lock_bh(&x1->lock);
1349 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1350 if (x->encap && x1->encap)
1351 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1352 if (x->coaddr && x1->coaddr) {
1353 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1355 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1356 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1357 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1360 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1361 if (x1->curlft.use_time)
1362 xfrm_state_check_expire(x1);
1365 x->km.state = XFRM_STATE_DEAD;
1366 __xfrm_state_put(x);
1368 spin_unlock_bh(&x1->lock);
1374 EXPORT_SYMBOL(xfrm_state_update);
1376 int xfrm_state_check_expire(struct xfrm_state *x)
1378 if (!x->curlft.use_time)
1379 x->curlft.use_time = get_seconds();
1381 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1382 x->curlft.packets >= x->lft.hard_packet_limit) {
1383 x->km.state = XFRM_STATE_EXPIRED;
1384 tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL);
1389 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1390 x->curlft.packets >= x->lft.soft_packet_limit)) {
1392 km_state_expired(x, 0, 0);
1396 EXPORT_SYMBOL(xfrm_state_check_expire);
1399 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
1400 u8 proto, unsigned short family)
1402 struct xfrm_state *x;
1404 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1405 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1406 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1409 EXPORT_SYMBOL(xfrm_state_lookup);
1412 xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1413 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1414 u8 proto, unsigned short family)
1416 struct xfrm_state *x;
1418 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1419 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
1420 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1423 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1426 xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1427 u8 proto, const xfrm_address_t *daddr,
1428 const xfrm_address_t *saddr, int create, unsigned short family)
1430 struct xfrm_state *x;
1432 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1433 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1434 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1438 EXPORT_SYMBOL(xfrm_find_acq);
1440 #ifdef CONFIG_XFRM_SUB_POLICY
1442 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1443 unsigned short family, struct net *net)
1446 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1448 return -EAFNOSUPPORT;
1450 spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/
1451 if (afinfo->tmpl_sort)
1452 err = afinfo->tmpl_sort(dst, src, n);
1453 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1454 xfrm_state_put_afinfo(afinfo);
1457 EXPORT_SYMBOL(xfrm_tmpl_sort);
1460 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1461 unsigned short family)
1464 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1465 struct net *net = xs_net(*src);
1468 return -EAFNOSUPPORT;
1470 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1471 if (afinfo->state_sort)
1472 err = afinfo->state_sort(dst, src, n);
1473 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1474 xfrm_state_put_afinfo(afinfo);
1477 EXPORT_SYMBOL(xfrm_state_sort);
1480 /* Silly enough, but I'm lazy to build resolution list */
1482 static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1486 for (i = 0; i <= net->xfrm.state_hmask; i++) {
1487 struct xfrm_state *x;
1489 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1490 if (x->km.seq == seq &&
1491 (mark & x->mark.m) == x->mark.v &&
1492 x->km.state == XFRM_STATE_ACQ) {
1501 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1503 struct xfrm_state *x;
1505 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1506 x = __xfrm_find_acq_byseq(net, mark, seq);
1507 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1510 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1512 u32 xfrm_get_acqseq(void)
1515 static atomic_t acqseq;
1518 res = atomic_inc_return(&acqseq);
1523 EXPORT_SYMBOL(xfrm_get_acqseq);
1525 int verify_spi_info(u8 proto, u32 min, u32 max)
1533 /* IPCOMP spi is 16-bits. */
1547 EXPORT_SYMBOL(verify_spi_info);
1549 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1551 struct net *net = xs_net(x);
1553 struct xfrm_state *x0;
1555 __be32 minspi = htonl(low);
1556 __be32 maxspi = htonl(high);
1557 u32 mark = x->mark.v & x->mark.m;
1559 spin_lock_bh(&x->lock);
1560 if (x->km.state == XFRM_STATE_DEAD)
1569 if (minspi == maxspi) {
1570 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1578 for (h = 0; h < high-low+1; h++) {
1579 spi = low + prandom_u32()%(high-low+1);
1580 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1582 x->id.spi = htonl(spi);
1589 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1590 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1591 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1592 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1598 spin_unlock_bh(&x->lock);
1602 EXPORT_SYMBOL(xfrm_alloc_spi);
1604 static bool __xfrm_state_filter_match(struct xfrm_state *x,
1605 struct xfrm_address_filter *filter)
1608 if ((filter->family == AF_INET ||
1609 filter->family == AF_INET6) &&
1610 x->props.family != filter->family)
1613 return addr_match(&x->props.saddr, &filter->saddr,
1615 addr_match(&x->id.daddr, &filter->daddr,
1621 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1622 int (*func)(struct xfrm_state *, int, void*),
1625 struct xfrm_state *state;
1626 struct xfrm_state_walk *x;
1629 if (walk->seq != 0 && list_empty(&walk->all))
1632 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1633 if (list_empty(&walk->all))
1634 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
1636 x = list_entry(&walk->all, struct xfrm_state_walk, all);
1637 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
1638 if (x->state == XFRM_STATE_DEAD)
1640 state = container_of(x, struct xfrm_state, km);
1641 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
1643 if (!__xfrm_state_filter_match(state, walk->filter))
1645 err = func(state, walk->seq, data);
1647 list_move_tail(&walk->all, &x->all);
1652 if (walk->seq == 0) {
1656 list_del_init(&walk->all);
1658 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1661 EXPORT_SYMBOL(xfrm_state_walk);
1663 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1664 struct xfrm_address_filter *filter)
1666 INIT_LIST_HEAD(&walk->all);
1667 walk->proto = proto;
1668 walk->state = XFRM_STATE_DEAD;
1670 walk->filter = filter;
1672 EXPORT_SYMBOL(xfrm_state_walk_init);
1674 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
1676 kfree(walk->filter);
1678 if (list_empty(&walk->all))
1681 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1682 list_del(&walk->all);
1683 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1685 EXPORT_SYMBOL(xfrm_state_walk_done);
1687 static void xfrm_replay_timer_handler(unsigned long data)
1689 struct xfrm_state *x = (struct xfrm_state *)data;
1691 spin_lock(&x->lock);
1693 if (x->km.state == XFRM_STATE_VALID) {
1694 if (xfrm_aevent_is_on(xs_net(x)))
1695 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
1697 x->xflags |= XFRM_TIME_DEFER;
1700 spin_unlock(&x->lock);
1703 static LIST_HEAD(xfrm_km_list);
1705 void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1707 struct xfrm_mgr *km;
1710 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1711 if (km->notify_policy)
1712 km->notify_policy(xp, dir, c);
1716 void km_state_notify(struct xfrm_state *x, const struct km_event *c)
1718 struct xfrm_mgr *km;
1720 list_for_each_entry_rcu(km, &xfrm_km_list, list)
1726 EXPORT_SYMBOL(km_policy_notify);
1727 EXPORT_SYMBOL(km_state_notify);
1729 void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
1735 c.event = XFRM_MSG_EXPIRE;
1736 km_state_notify(x, &c);
1739 EXPORT_SYMBOL(km_state_expired);
1741 * We send to all registered managers regardless of failure
1742 * We are happy with one success
1744 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1746 int err = -EINVAL, acqret;
1747 struct xfrm_mgr *km;
1750 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1751 acqret = km->acquire(x, t, pol);
1758 EXPORT_SYMBOL(km_query);
1760 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1763 struct xfrm_mgr *km;
1766 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1767 if (km->new_mapping)
1768 err = km->new_mapping(x, ipaddr, sport);
1775 EXPORT_SYMBOL(km_new_mapping);
1777 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1783 c.event = XFRM_MSG_POLEXPIRE;
1784 km_policy_notify(pol, dir, &c);
1786 EXPORT_SYMBOL(km_policy_expired);
1788 #ifdef CONFIG_XFRM_MIGRATE
1789 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1790 const struct xfrm_migrate *m, int num_migrate,
1791 const struct xfrm_kmaddress *k)
1795 struct xfrm_mgr *km;
1798 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1800 ret = km->migrate(sel, dir, type, m, num_migrate, k);
1808 EXPORT_SYMBOL(km_migrate);
1811 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
1815 struct xfrm_mgr *km;
1818 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1820 ret = km->report(net, proto, sel, addr);
1828 EXPORT_SYMBOL(km_report);
1830 bool km_is_alive(const struct km_event *c)
1832 struct xfrm_mgr *km;
1833 bool is_alive = false;
1836 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1837 if (km->is_alive && km->is_alive(c)) {
1846 EXPORT_SYMBOL(km_is_alive);
1848 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1852 struct xfrm_mgr *km;
1853 struct xfrm_policy *pol = NULL;
1855 if (optlen <= 0 || optlen > PAGE_SIZE)
1858 data = kmalloc(optlen, GFP_KERNEL);
1863 if (copy_from_user(data, optval, optlen))
1868 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1869 pol = km->compile_policy(sk, optname, data,
1877 xfrm_sk_policy_insert(sk, err, pol);
1886 EXPORT_SYMBOL(xfrm_user_policy);
1888 static DEFINE_SPINLOCK(xfrm_km_lock);
1890 int xfrm_register_km(struct xfrm_mgr *km)
1892 spin_lock_bh(&xfrm_km_lock);
1893 list_add_tail_rcu(&km->list, &xfrm_km_list);
1894 spin_unlock_bh(&xfrm_km_lock);
1897 EXPORT_SYMBOL(xfrm_register_km);
1899 int xfrm_unregister_km(struct xfrm_mgr *km)
1901 spin_lock_bh(&xfrm_km_lock);
1902 list_del_rcu(&km->list);
1903 spin_unlock_bh(&xfrm_km_lock);
1907 EXPORT_SYMBOL(xfrm_unregister_km);
1909 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1912 if (unlikely(afinfo == NULL))
1914 if (unlikely(afinfo->family >= NPROTO))
1915 return -EAFNOSUPPORT;
1916 spin_lock_bh(&xfrm_state_afinfo_lock);
1917 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1920 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
1921 spin_unlock_bh(&xfrm_state_afinfo_lock);
1924 EXPORT_SYMBOL(xfrm_state_register_afinfo);
1926 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1929 if (unlikely(afinfo == NULL))
1931 if (unlikely(afinfo->family >= NPROTO))
1932 return -EAFNOSUPPORT;
1933 spin_lock_bh(&xfrm_state_afinfo_lock);
1934 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1935 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1938 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1940 spin_unlock_bh(&xfrm_state_afinfo_lock);
1944 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1946 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1948 struct xfrm_state_afinfo *afinfo;
1949 if (unlikely(family >= NPROTO))
1952 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
1953 if (unlikely(!afinfo))
1958 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1963 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1964 void xfrm_state_delete_tunnel(struct xfrm_state *x)
1967 struct xfrm_state *t = x->tunnel;
1969 if (atomic_read(&t->tunnel_users) == 2)
1970 xfrm_state_delete(t);
1971 atomic_dec(&t->tunnel_users);
1976 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1978 int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1982 spin_lock_bh(&x->lock);
1983 if (x->km.state == XFRM_STATE_VALID &&
1984 x->type && x->type->get_mtu)
1985 res = x->type->get_mtu(x, mtu);
1987 res = mtu - x->props.header_len;
1988 spin_unlock_bh(&x->lock);
1992 int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
1994 struct xfrm_state_afinfo *afinfo;
1995 struct xfrm_mode *inner_mode;
1996 int family = x->props.family;
1999 err = -EAFNOSUPPORT;
2000 afinfo = xfrm_state_get_afinfo(family);
2005 if (afinfo->init_flags)
2006 err = afinfo->init_flags(x);
2008 xfrm_state_put_afinfo(afinfo);
2013 err = -EPROTONOSUPPORT;
2015 if (x->sel.family != AF_UNSPEC) {
2016 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2017 if (inner_mode == NULL)
2020 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2021 family != x->sel.family) {
2022 xfrm_put_mode(inner_mode);
2026 x->inner_mode = inner_mode;
2028 struct xfrm_mode *inner_mode_iaf;
2029 int iafamily = AF_INET;
2031 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
2032 if (inner_mode == NULL)
2035 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2036 xfrm_put_mode(inner_mode);
2039 x->inner_mode = inner_mode;
2041 if (x->props.family == AF_INET)
2042 iafamily = AF_INET6;
2044 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2045 if (inner_mode_iaf) {
2046 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2047 x->inner_mode_iaf = inner_mode_iaf;
2049 xfrm_put_mode(inner_mode_iaf);
2053 x->type = xfrm_get_type(x->id.proto, family);
2054 if (x->type == NULL)
2057 err = x->type->init_state(x);
2061 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2062 if (x->outer_mode == NULL) {
2063 err = -EPROTONOSUPPORT;
2068 err = xfrm_init_replay(x);
2073 x->km.state = XFRM_STATE_VALID;
2079 EXPORT_SYMBOL(__xfrm_init_state);
2081 int xfrm_init_state(struct xfrm_state *x)
2083 return __xfrm_init_state(x, true);
2086 EXPORT_SYMBOL(xfrm_init_state);
2088 int __net_init xfrm_state_init(struct net *net)
2092 INIT_LIST_HEAD(&net->xfrm.state_all);
2094 sz = sizeof(struct hlist_head) * 8;
2096 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2097 if (!net->xfrm.state_bydst)
2099 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2100 if (!net->xfrm.state_bysrc)
2102 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2103 if (!net->xfrm.state_byspi)
2105 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2107 net->xfrm.state_num = 0;
2108 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
2109 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
2110 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
2111 spin_lock_init(&net->xfrm.xfrm_state_lock);
2115 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2117 xfrm_hash_free(net->xfrm.state_bydst, sz);
2122 void xfrm_state_fini(struct net *net)
2126 flush_work(&net->xfrm.state_hash_work);
2127 xfrm_state_flush(net, IPSEC_PROTO_ANY, false);
2128 flush_work(&net->xfrm.state_gc_work);
2130 WARN_ON(!list_empty(&net->xfrm.state_all));
2132 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
2133 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2134 xfrm_hash_free(net->xfrm.state_byspi, sz);
2135 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2136 xfrm_hash_free(net->xfrm.state_bysrc, sz);
2137 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2138 xfrm_hash_free(net->xfrm.state_bydst, sz);
2141 #ifdef CONFIG_AUDITSYSCALL
2142 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2143 struct audit_buffer *audit_buf)
2145 struct xfrm_sec_ctx *ctx = x->security;
2146 u32 spi = ntohl(x->id.spi);
2149 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2150 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2152 switch (x->props.family) {
2154 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2155 &x->props.saddr.a4, &x->id.daddr.a4);
2158 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
2159 x->props.saddr.a6, x->id.daddr.a6);
2163 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2166 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2167 struct audit_buffer *audit_buf)
2169 const struct iphdr *iph4;
2170 const struct ipv6hdr *iph6;
2175 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2176 &iph4->saddr, &iph4->daddr);
2179 iph6 = ipv6_hdr(skb);
2180 audit_log_format(audit_buf,
2181 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2182 &iph6->saddr, &iph6->daddr,
2183 iph6->flow_lbl[0] & 0x0f,
2190 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
2192 struct audit_buffer *audit_buf;
2194 audit_buf = xfrm_audit_start("SAD-add");
2195 if (audit_buf == NULL)
2197 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2198 xfrm_audit_helper_sainfo(x, audit_buf);
2199 audit_log_format(audit_buf, " res=%u", result);
2200 audit_log_end(audit_buf);
2202 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2204 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
2206 struct audit_buffer *audit_buf;
2208 audit_buf = xfrm_audit_start("SAD-delete");
2209 if (audit_buf == NULL)
2211 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
2212 xfrm_audit_helper_sainfo(x, audit_buf);
2213 audit_log_format(audit_buf, " res=%u", result);
2214 audit_log_end(audit_buf);
2216 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2218 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2219 struct sk_buff *skb)
2221 struct audit_buffer *audit_buf;
2224 audit_buf = xfrm_audit_start("SA-replay-overflow");
2225 if (audit_buf == NULL)
2227 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2228 /* don't record the sequence number because it's inherent in this kind
2229 * of audit message */
2230 spi = ntohl(x->id.spi);
2231 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2232 audit_log_end(audit_buf);
2234 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2236 void xfrm_audit_state_replay(struct xfrm_state *x,
2237 struct sk_buff *skb, __be32 net_seq)
2239 struct audit_buffer *audit_buf;
2242 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2243 if (audit_buf == NULL)
2245 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2246 spi = ntohl(x->id.spi);
2247 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2248 spi, spi, ntohl(net_seq));
2249 audit_log_end(audit_buf);
2251 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
2253 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2255 struct audit_buffer *audit_buf;
2257 audit_buf = xfrm_audit_start("SA-notfound");
2258 if (audit_buf == NULL)
2260 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2261 audit_log_end(audit_buf);
2263 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2265 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2266 __be32 net_spi, __be32 net_seq)
2268 struct audit_buffer *audit_buf;
2271 audit_buf = xfrm_audit_start("SA-notfound");
2272 if (audit_buf == NULL)
2274 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2275 spi = ntohl(net_spi);
2276 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2277 spi, spi, ntohl(net_seq));
2278 audit_log_end(audit_buf);
2280 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2282 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2283 struct sk_buff *skb, u8 proto)
2285 struct audit_buffer *audit_buf;
2289 audit_buf = xfrm_audit_start("SA-icv-failure");
2290 if (audit_buf == NULL)
2292 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2293 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2294 u32 spi = ntohl(net_spi);
2295 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2296 spi, spi, ntohl(net_seq));
2298 audit_log_end(audit_buf);
2300 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2301 #endif /* CONFIG_AUDITSYSCALL */