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>
25 #include "xfrm_hash.h"
28 EXPORT_SYMBOL(xfrm_nl);
30 u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;
31 EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
33 u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE;
34 EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
36 u32 sysctl_xfrm_acq_expires __read_mostly = 30;
38 /* Each xfrm_state may be linked to two tables:
40 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
41 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
42 destination/tunnel endpoint. (output)
45 static DEFINE_SPINLOCK(xfrm_state_lock);
47 /* Hash table to find appropriate SA towards given target (endpoint
48 * of tunnel or destination of transport mode) allowed by selector.
50 * Main use is finding SA after policy selected tunnel or transport mode.
51 * Also, it can be used by ah/esp icmp error handler to find offending SA.
53 static LIST_HEAD(xfrm_state_all);
54 static struct hlist_head *xfrm_state_bydst __read_mostly;
55 static struct hlist_head *xfrm_state_bysrc __read_mostly;
56 static struct hlist_head *xfrm_state_byspi __read_mostly;
57 static unsigned int xfrm_state_hmask __read_mostly;
58 static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
59 static unsigned int xfrm_state_num;
60 static unsigned int xfrm_state_genid;
62 static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
63 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
65 #ifdef CONFIG_AUDITSYSCALL
66 static void xfrm_audit_state_replay(struct xfrm_state *x,
67 struct sk_buff *skb, __be32 net_seq);
69 #define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
70 #endif /* CONFIG_AUDITSYSCALL */
72 static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
73 xfrm_address_t *saddr,
75 unsigned short family)
77 return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask);
80 static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr,
81 xfrm_address_t *saddr,
82 unsigned short family)
84 return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask);
87 static inline unsigned int
88 xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
90 return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask);
93 static void xfrm_hash_transfer(struct hlist_head *list,
94 struct hlist_head *ndsttable,
95 struct hlist_head *nsrctable,
96 struct hlist_head *nspitable,
97 unsigned int nhashmask)
99 struct hlist_node *entry, *tmp;
100 struct xfrm_state *x;
102 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
105 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
106 x->props.reqid, x->props.family,
108 hlist_add_head(&x->bydst, ndsttable+h);
110 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
113 hlist_add_head(&x->bysrc, nsrctable+h);
116 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
117 x->id.proto, x->props.family,
119 hlist_add_head(&x->byspi, nspitable+h);
124 static unsigned long xfrm_hash_new_size(void)
126 return ((xfrm_state_hmask + 1) << 1) *
127 sizeof(struct hlist_head);
130 static DEFINE_MUTEX(hash_resize_mutex);
132 static void xfrm_hash_resize(struct work_struct *__unused)
134 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
135 unsigned long nsize, osize;
136 unsigned int nhashmask, ohashmask;
139 mutex_lock(&hash_resize_mutex);
141 nsize = xfrm_hash_new_size();
142 ndst = xfrm_hash_alloc(nsize);
145 nsrc = xfrm_hash_alloc(nsize);
147 xfrm_hash_free(ndst, nsize);
150 nspi = xfrm_hash_alloc(nsize);
152 xfrm_hash_free(ndst, nsize);
153 xfrm_hash_free(nsrc, nsize);
157 spin_lock_bh(&xfrm_state_lock);
159 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
160 for (i = xfrm_state_hmask; i >= 0; i--)
161 xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi,
164 odst = xfrm_state_bydst;
165 osrc = xfrm_state_bysrc;
166 ospi = xfrm_state_byspi;
167 ohashmask = xfrm_state_hmask;
169 xfrm_state_bydst = ndst;
170 xfrm_state_bysrc = nsrc;
171 xfrm_state_byspi = nspi;
172 xfrm_state_hmask = nhashmask;
174 spin_unlock_bh(&xfrm_state_lock);
176 osize = (ohashmask + 1) * sizeof(struct hlist_head);
177 xfrm_hash_free(odst, osize);
178 xfrm_hash_free(osrc, osize);
179 xfrm_hash_free(ospi, osize);
182 mutex_unlock(&hash_resize_mutex);
185 static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize);
187 DECLARE_WAIT_QUEUE_HEAD(km_waitq);
188 EXPORT_SYMBOL(km_waitq);
190 static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
191 static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
193 static struct work_struct xfrm_state_gc_work;
194 static HLIST_HEAD(xfrm_state_gc_list);
195 static DEFINE_SPINLOCK(xfrm_state_gc_lock);
197 int __xfrm_state_delete(struct xfrm_state *x);
199 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
200 void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
202 static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
204 struct xfrm_state_afinfo *afinfo;
205 if (unlikely(family >= NPROTO))
207 write_lock_bh(&xfrm_state_afinfo_lock);
208 afinfo = xfrm_state_afinfo[family];
209 if (unlikely(!afinfo))
210 write_unlock_bh(&xfrm_state_afinfo_lock);
214 static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
215 __releases(xfrm_state_afinfo_lock)
217 write_unlock_bh(&xfrm_state_afinfo_lock);
220 int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
222 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
223 const struct xfrm_type **typemap;
226 if (unlikely(afinfo == NULL))
227 return -EAFNOSUPPORT;
228 typemap = afinfo->type_map;
230 if (likely(typemap[type->proto] == NULL))
231 typemap[type->proto] = type;
234 xfrm_state_unlock_afinfo(afinfo);
237 EXPORT_SYMBOL(xfrm_register_type);
239 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
241 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
242 const struct xfrm_type **typemap;
245 if (unlikely(afinfo == NULL))
246 return -EAFNOSUPPORT;
247 typemap = afinfo->type_map;
249 if (unlikely(typemap[type->proto] != type))
252 typemap[type->proto] = NULL;
253 xfrm_state_unlock_afinfo(afinfo);
256 EXPORT_SYMBOL(xfrm_unregister_type);
258 static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
260 struct xfrm_state_afinfo *afinfo;
261 const struct xfrm_type **typemap;
262 const struct xfrm_type *type;
263 int modload_attempted = 0;
266 afinfo = xfrm_state_get_afinfo(family);
267 if (unlikely(afinfo == NULL))
269 typemap = afinfo->type_map;
271 type = typemap[proto];
272 if (unlikely(type && !try_module_get(type->owner)))
274 if (!type && !modload_attempted) {
275 xfrm_state_put_afinfo(afinfo);
276 request_module("xfrm-type-%d-%d", family, proto);
277 modload_attempted = 1;
281 xfrm_state_put_afinfo(afinfo);
285 static void xfrm_put_type(const struct xfrm_type *type)
287 module_put(type->owner);
290 int xfrm_register_mode(struct xfrm_mode *mode, int family)
292 struct xfrm_state_afinfo *afinfo;
293 struct xfrm_mode **modemap;
296 if (unlikely(mode->encap >= XFRM_MODE_MAX))
299 afinfo = xfrm_state_lock_afinfo(family);
300 if (unlikely(afinfo == NULL))
301 return -EAFNOSUPPORT;
304 modemap = afinfo->mode_map;
305 if (modemap[mode->encap])
309 if (!try_module_get(afinfo->owner))
312 mode->afinfo = afinfo;
313 modemap[mode->encap] = mode;
317 xfrm_state_unlock_afinfo(afinfo);
320 EXPORT_SYMBOL(xfrm_register_mode);
322 int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
324 struct xfrm_state_afinfo *afinfo;
325 struct xfrm_mode **modemap;
328 if (unlikely(mode->encap >= XFRM_MODE_MAX))
331 afinfo = xfrm_state_lock_afinfo(family);
332 if (unlikely(afinfo == NULL))
333 return -EAFNOSUPPORT;
336 modemap = afinfo->mode_map;
337 if (likely(modemap[mode->encap] == mode)) {
338 modemap[mode->encap] = NULL;
339 module_put(mode->afinfo->owner);
343 xfrm_state_unlock_afinfo(afinfo);
346 EXPORT_SYMBOL(xfrm_unregister_mode);
348 static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
350 struct xfrm_state_afinfo *afinfo;
351 struct xfrm_mode *mode;
352 int modload_attempted = 0;
354 if (unlikely(encap >= XFRM_MODE_MAX))
358 afinfo = xfrm_state_get_afinfo(family);
359 if (unlikely(afinfo == NULL))
362 mode = afinfo->mode_map[encap];
363 if (unlikely(mode && !try_module_get(mode->owner)))
365 if (!mode && !modload_attempted) {
366 xfrm_state_put_afinfo(afinfo);
367 request_module("xfrm-mode-%d-%d", family, encap);
368 modload_attempted = 1;
372 xfrm_state_put_afinfo(afinfo);
376 static void xfrm_put_mode(struct xfrm_mode *mode)
378 module_put(mode->owner);
381 static void xfrm_state_gc_destroy(struct xfrm_state *x)
383 del_timer_sync(&x->timer);
384 del_timer_sync(&x->rtimer);
391 xfrm_put_mode(x->inner_mode);
392 if (x->inner_mode_iaf)
393 xfrm_put_mode(x->inner_mode_iaf);
395 xfrm_put_mode(x->outer_mode);
397 x->type->destructor(x);
398 xfrm_put_type(x->type);
400 security_xfrm_state_free(x);
404 static void xfrm_state_gc_task(struct work_struct *data)
406 struct xfrm_state *x;
407 struct hlist_node *entry, *tmp;
408 struct hlist_head gc_list;
410 spin_lock_bh(&xfrm_state_gc_lock);
411 gc_list.first = xfrm_state_gc_list.first;
412 INIT_HLIST_HEAD(&xfrm_state_gc_list);
413 spin_unlock_bh(&xfrm_state_gc_lock);
415 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst)
416 xfrm_state_gc_destroy(x);
421 static inline unsigned long make_jiffies(long secs)
423 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
424 return MAX_SCHEDULE_TIMEOUT-1;
429 static void xfrm_timer_handler(unsigned long data)
431 struct xfrm_state *x = (struct xfrm_state*)data;
432 unsigned long now = get_seconds();
433 long next = LONG_MAX;
438 if (x->km.state == XFRM_STATE_DEAD)
440 if (x->km.state == XFRM_STATE_EXPIRED)
442 if (x->lft.hard_add_expires_seconds) {
443 long tmo = x->lft.hard_add_expires_seconds +
444 x->curlft.add_time - now;
450 if (x->lft.hard_use_expires_seconds) {
451 long tmo = x->lft.hard_use_expires_seconds +
452 (x->curlft.use_time ? : now) - now;
460 if (x->lft.soft_add_expires_seconds) {
461 long tmo = x->lft.soft_add_expires_seconds +
462 x->curlft.add_time - now;
468 if (x->lft.soft_use_expires_seconds) {
469 long tmo = x->lft.soft_use_expires_seconds +
470 (x->curlft.use_time ? : now) - now;
479 km_state_expired(x, 0, 0);
481 if (next != LONG_MAX)
482 mod_timer(&x->timer, jiffies + make_jiffies(next));
487 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
488 x->km.state = XFRM_STATE_EXPIRED;
494 err = __xfrm_state_delete(x);
495 if (!err && x->id.spi)
496 km_state_expired(x, 1, 0);
498 xfrm_audit_state_delete(x, err ? 0 : 1,
499 audit_get_loginuid(current),
500 audit_get_sessionid(current), 0);
503 spin_unlock(&x->lock);
506 static void xfrm_replay_timer_handler(unsigned long data);
508 struct xfrm_state *xfrm_state_alloc(void)
510 struct xfrm_state *x;
512 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
515 atomic_set(&x->refcnt, 1);
516 atomic_set(&x->tunnel_users, 0);
517 INIT_LIST_HEAD(&x->all);
518 INIT_HLIST_NODE(&x->bydst);
519 INIT_HLIST_NODE(&x->bysrc);
520 INIT_HLIST_NODE(&x->byspi);
521 setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x);
522 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
524 x->curlft.add_time = get_seconds();
525 x->lft.soft_byte_limit = XFRM_INF;
526 x->lft.soft_packet_limit = XFRM_INF;
527 x->lft.hard_byte_limit = XFRM_INF;
528 x->lft.hard_packet_limit = XFRM_INF;
529 x->replay_maxage = 0;
530 x->replay_maxdiff = 0;
531 x->inner_mode = NULL;
532 x->inner_mode_iaf = NULL;
533 spin_lock_init(&x->lock);
537 EXPORT_SYMBOL(xfrm_state_alloc);
539 void __xfrm_state_destroy(struct xfrm_state *x)
541 WARN_ON(x->km.state != XFRM_STATE_DEAD);
543 spin_lock_bh(&xfrm_state_lock);
545 spin_unlock_bh(&xfrm_state_lock);
547 spin_lock_bh(&xfrm_state_gc_lock);
548 hlist_add_head(&x->bydst, &xfrm_state_gc_list);
549 spin_unlock_bh(&xfrm_state_gc_lock);
550 schedule_work(&xfrm_state_gc_work);
552 EXPORT_SYMBOL(__xfrm_state_destroy);
554 int __xfrm_state_delete(struct xfrm_state *x)
558 if (x->km.state != XFRM_STATE_DEAD) {
559 x->km.state = XFRM_STATE_DEAD;
560 spin_lock(&xfrm_state_lock);
561 hlist_del(&x->bydst);
562 hlist_del(&x->bysrc);
564 hlist_del(&x->byspi);
566 spin_unlock(&xfrm_state_lock);
568 /* All xfrm_state objects are created by xfrm_state_alloc.
569 * The xfrm_state_alloc call gives a reference, and that
570 * is what we are dropping here.
578 EXPORT_SYMBOL(__xfrm_state_delete);
580 int xfrm_state_delete(struct xfrm_state *x)
584 spin_lock_bh(&x->lock);
585 err = __xfrm_state_delete(x);
586 spin_unlock_bh(&x->lock);
590 EXPORT_SYMBOL(xfrm_state_delete);
592 #ifdef CONFIG_SECURITY_NETWORK_XFRM
594 xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
598 for (i = 0; i <= xfrm_state_hmask; i++) {
599 struct hlist_node *entry;
600 struct xfrm_state *x;
602 hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
603 if (xfrm_id_proto_match(x->id.proto, proto) &&
604 (err = security_xfrm_state_delete(x)) != 0) {
605 xfrm_audit_state_delete(x, 0,
606 audit_info->loginuid,
607 audit_info->sessionid,
618 xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
624 int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
628 spin_lock_bh(&xfrm_state_lock);
629 err = xfrm_state_flush_secctx_check(proto, audit_info);
633 for (i = 0; i <= xfrm_state_hmask; i++) {
634 struct hlist_node *entry;
635 struct xfrm_state *x;
637 hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
638 if (!xfrm_state_kern(x) &&
639 xfrm_id_proto_match(x->id.proto, proto)) {
641 spin_unlock_bh(&xfrm_state_lock);
643 err = xfrm_state_delete(x);
644 xfrm_audit_state_delete(x, err ? 0 : 1,
645 audit_info->loginuid,
646 audit_info->sessionid,
650 spin_lock_bh(&xfrm_state_lock);
658 spin_unlock_bh(&xfrm_state_lock);
662 EXPORT_SYMBOL(xfrm_state_flush);
664 void xfrm_sad_getinfo(struct xfrmk_sadinfo *si)
666 spin_lock_bh(&xfrm_state_lock);
667 si->sadcnt = xfrm_state_num;
668 si->sadhcnt = xfrm_state_hmask;
669 si->sadhmcnt = xfrm_state_hashmax;
670 spin_unlock_bh(&xfrm_state_lock);
672 EXPORT_SYMBOL(xfrm_sad_getinfo);
675 xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
676 struct xfrm_tmpl *tmpl,
677 xfrm_address_t *daddr, xfrm_address_t *saddr,
678 unsigned short family)
680 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
683 afinfo->init_tempsel(x, fl, tmpl, daddr, saddr);
684 xfrm_state_put_afinfo(afinfo);
688 static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
690 unsigned int h = xfrm_spi_hash(daddr, spi, proto, family);
691 struct xfrm_state *x;
692 struct hlist_node *entry;
694 hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) {
695 if (x->props.family != family ||
697 x->id.proto != proto)
702 if (x->id.daddr.a4 != daddr->a4)
706 if (!ipv6_addr_equal((struct in6_addr *)daddr,
720 static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family)
722 unsigned int h = xfrm_src_hash(daddr, saddr, family);
723 struct xfrm_state *x;
724 struct hlist_node *entry;
726 hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) {
727 if (x->props.family != family ||
728 x->id.proto != proto)
733 if (x->id.daddr.a4 != daddr->a4 ||
734 x->props.saddr.a4 != saddr->a4)
738 if (!ipv6_addr_equal((struct in6_addr *)daddr,
741 !ipv6_addr_equal((struct in6_addr *)saddr,
755 static inline struct xfrm_state *
756 __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
759 return __xfrm_state_lookup(&x->id.daddr, x->id.spi,
760 x->id.proto, family);
762 return __xfrm_state_lookup_byaddr(&x->id.daddr,
764 x->id.proto, family);
767 static void xfrm_hash_grow_check(int have_hash_collision)
769 if (have_hash_collision &&
770 (xfrm_state_hmask + 1) < xfrm_state_hashmax &&
771 xfrm_state_num > xfrm_state_hmask)
772 schedule_work(&xfrm_hash_work);
776 xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
777 struct flowi *fl, struct xfrm_tmpl *tmpl,
778 struct xfrm_policy *pol, int *err,
779 unsigned short family)
782 struct hlist_node *entry;
783 struct xfrm_state *x, *x0, *to_put;
784 int acquire_in_progress = 0;
786 struct xfrm_state *best = NULL;
790 spin_lock_bh(&xfrm_state_lock);
791 h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family);
792 hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
793 if (x->props.family == family &&
794 x->props.reqid == tmpl->reqid &&
795 !(x->props.flags & XFRM_STATE_WILDRECV) &&
796 xfrm_state_addr_check(x, daddr, saddr, family) &&
797 tmpl->mode == x->props.mode &&
798 tmpl->id.proto == x->id.proto &&
799 (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) {
801 1. There is a valid state with matching selector.
803 2. Valid state with inappropriate selector. Skip.
805 Entering area of "sysdeps".
807 3. If state is not valid, selector is temporary,
808 it selects only session which triggered
809 previous resolution. Key manager will do
810 something to install a state with proper
813 if (x->km.state == XFRM_STATE_VALID) {
814 if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
815 !security_xfrm_state_pol_flow_match(x, pol, fl))
818 best->km.dying > x->km.dying ||
819 (best->km.dying == x->km.dying &&
820 best->curlft.add_time < x->curlft.add_time))
822 } else if (x->km.state == XFRM_STATE_ACQ) {
823 acquire_in_progress = 1;
824 } else if (x->km.state == XFRM_STATE_ERROR ||
825 x->km.state == XFRM_STATE_EXPIRED) {
826 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
827 security_xfrm_state_pol_flow_match(x, pol, fl))
834 if (!x && !error && !acquire_in_progress) {
836 (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi,
837 tmpl->id.proto, family)) != NULL) {
842 x = xfrm_state_alloc();
847 /* Initialize temporary selector matching only
848 * to current session. */
849 xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
851 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
853 x->km.state = XFRM_STATE_DEAD;
859 if (km_query(x, tmpl, pol) == 0) {
860 x->km.state = XFRM_STATE_ACQ;
861 hlist_add_head(&x->bydst, xfrm_state_bydst+h);
862 h = xfrm_src_hash(daddr, saddr, family);
863 hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
865 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family);
866 hlist_add_head(&x->byspi, xfrm_state_byspi+h);
868 x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
869 x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
870 add_timer(&x->timer);
872 xfrm_hash_grow_check(x->bydst.next != NULL);
874 x->km.state = XFRM_STATE_DEAD;
884 *err = acquire_in_progress ? -EAGAIN : error;
885 spin_unlock_bh(&xfrm_state_lock);
887 xfrm_state_put(to_put);
892 xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
893 unsigned short family, u8 mode, u8 proto, u32 reqid)
896 struct xfrm_state *rx = NULL, *x = NULL;
897 struct hlist_node *entry;
899 spin_lock(&xfrm_state_lock);
900 h = xfrm_dst_hash(daddr, saddr, reqid, family);
901 hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
902 if (x->props.family == family &&
903 x->props.reqid == reqid &&
904 !(x->props.flags & XFRM_STATE_WILDRECV) &&
905 xfrm_state_addr_check(x, daddr, saddr, family) &&
906 mode == x->props.mode &&
907 proto == x->id.proto &&
908 x->km.state == XFRM_STATE_VALID) {
916 spin_unlock(&xfrm_state_lock);
921 EXPORT_SYMBOL(xfrm_stateonly_find);
923 static void __xfrm_state_insert(struct xfrm_state *x)
927 x->genid = ++xfrm_state_genid;
929 list_add_tail(&x->all, &xfrm_state_all);
931 h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
932 x->props.reqid, x->props.family);
933 hlist_add_head(&x->bydst, xfrm_state_bydst+h);
935 h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family);
936 hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
939 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto,
942 hlist_add_head(&x->byspi, xfrm_state_byspi+h);
945 mod_timer(&x->timer, jiffies + HZ);
946 if (x->replay_maxage)
947 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
953 xfrm_hash_grow_check(x->bydst.next != NULL);
956 /* xfrm_state_lock is held */
957 static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
959 unsigned short family = xnew->props.family;
960 u32 reqid = xnew->props.reqid;
961 struct xfrm_state *x;
962 struct hlist_node *entry;
965 h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family);
966 hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
967 if (x->props.family == family &&
968 x->props.reqid == reqid &&
969 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
970 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
971 x->genid = xfrm_state_genid;
975 void xfrm_state_insert(struct xfrm_state *x)
977 spin_lock_bh(&xfrm_state_lock);
978 __xfrm_state_bump_genids(x);
979 __xfrm_state_insert(x);
980 spin_unlock_bh(&xfrm_state_lock);
982 EXPORT_SYMBOL(xfrm_state_insert);
984 /* xfrm_state_lock is held */
985 static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create)
987 unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family);
988 struct hlist_node *entry;
989 struct xfrm_state *x;
991 hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
992 if (x->props.reqid != reqid ||
993 x->props.mode != mode ||
994 x->props.family != family ||
995 x->km.state != XFRM_STATE_ACQ ||
997 x->id.proto != proto)
1002 if (x->id.daddr.a4 != daddr->a4 ||
1003 x->props.saddr.a4 != saddr->a4)
1007 if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6,
1008 (struct in6_addr *)daddr) ||
1009 !ipv6_addr_equal((struct in6_addr *)
1011 (struct in6_addr *)saddr))
1023 x = xfrm_state_alloc();
1027 x->sel.daddr.a4 = daddr->a4;
1028 x->sel.saddr.a4 = saddr->a4;
1029 x->sel.prefixlen_d = 32;
1030 x->sel.prefixlen_s = 32;
1031 x->props.saddr.a4 = saddr->a4;
1032 x->id.daddr.a4 = daddr->a4;
1036 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1037 (struct in6_addr *)daddr);
1038 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1039 (struct in6_addr *)saddr);
1040 x->sel.prefixlen_d = 128;
1041 x->sel.prefixlen_s = 128;
1042 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1043 (struct in6_addr *)saddr);
1044 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1045 (struct in6_addr *)daddr);
1049 x->km.state = XFRM_STATE_ACQ;
1050 x->id.proto = proto;
1051 x->props.family = family;
1052 x->props.mode = mode;
1053 x->props.reqid = reqid;
1054 x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
1056 x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
1057 add_timer(&x->timer);
1058 hlist_add_head(&x->bydst, xfrm_state_bydst+h);
1059 h = xfrm_src_hash(daddr, saddr, family);
1060 hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
1064 xfrm_hash_grow_check(x->bydst.next != NULL);
1070 static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
1072 int xfrm_state_add(struct xfrm_state *x)
1074 struct xfrm_state *x1, *to_put;
1077 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1079 family = x->props.family;
1083 spin_lock_bh(&xfrm_state_lock);
1085 x1 = __xfrm_state_locate(x, use_spi, family);
1093 if (use_spi && x->km.seq) {
1094 x1 = __xfrm_find_acq_byseq(x->km.seq);
1095 if (x1 && ((x1->id.proto != x->id.proto) ||
1096 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
1103 x1 = __find_acq_core(family, x->props.mode, x->props.reqid,
1105 &x->id.daddr, &x->props.saddr, 0);
1107 __xfrm_state_bump_genids(x);
1108 __xfrm_state_insert(x);
1112 spin_unlock_bh(&xfrm_state_lock);
1115 xfrm_state_delete(x1);
1120 xfrm_state_put(to_put);
1124 EXPORT_SYMBOL(xfrm_state_add);
1126 #ifdef CONFIG_XFRM_MIGRATE
1127 static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
1130 struct xfrm_state *x = xfrm_state_alloc();
1134 memcpy(&x->id, &orig->id, sizeof(x->id));
1135 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1136 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1137 x->props.mode = orig->props.mode;
1138 x->props.replay_window = orig->props.replay_window;
1139 x->props.reqid = orig->props.reqid;
1140 x->props.family = orig->props.family;
1141 x->props.saddr = orig->props.saddr;
1144 x->aalg = xfrm_algo_clone(orig->aalg);
1148 x->props.aalgo = orig->props.aalgo;
1151 x->ealg = xfrm_algo_clone(orig->ealg);
1155 x->props.ealgo = orig->props.ealgo;
1158 x->calg = xfrm_algo_clone(orig->calg);
1162 x->props.calgo = orig->props.calgo;
1165 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1171 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1177 err = xfrm_init_state(x);
1181 x->props.flags = orig->props.flags;
1183 x->curlft.add_time = orig->curlft.add_time;
1184 x->km.state = orig->km.state;
1185 x->km.seq = orig->km.seq;
1203 /* xfrm_state_lock is held */
1204 struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1207 struct xfrm_state *x;
1208 struct hlist_node *entry;
1211 h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr,
1212 m->reqid, m->old_family);
1213 hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
1214 if (x->props.mode != m->mode ||
1215 x->id.proto != m->proto)
1217 if (m->reqid && x->props.reqid != m->reqid)
1219 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1221 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1228 h = xfrm_src_hash(&m->old_daddr, &m->old_saddr,
1230 hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) {
1231 if (x->props.mode != m->mode ||
1232 x->id.proto != m->proto)
1234 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1236 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1246 EXPORT_SYMBOL(xfrm_migrate_state_find);
1248 struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1249 struct xfrm_migrate *m)
1251 struct xfrm_state *xc;
1254 xc = xfrm_state_clone(x, &err);
1258 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1259 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1262 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1263 /* a care is needed when the destination address of the
1264 state is to be updated as it is a part of triplet */
1265 xfrm_state_insert(xc);
1267 if ((err = xfrm_state_add(xc)) < 0)
1276 EXPORT_SYMBOL(xfrm_state_migrate);
1279 int xfrm_state_update(struct xfrm_state *x)
1281 struct xfrm_state *x1, *to_put;
1283 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1287 spin_lock_bh(&xfrm_state_lock);
1288 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1294 if (xfrm_state_kern(x1)) {
1300 if (x1->km.state == XFRM_STATE_ACQ) {
1301 __xfrm_state_insert(x);
1307 spin_unlock_bh(&xfrm_state_lock);
1310 xfrm_state_put(to_put);
1316 xfrm_state_delete(x1);
1322 spin_lock_bh(&x1->lock);
1323 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1324 if (x->encap && x1->encap)
1325 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
1326 if (x->coaddr && x1->coaddr) {
1327 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1329 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1330 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1331 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1334 mod_timer(&x1->timer, jiffies + HZ);
1335 if (x1->curlft.use_time)
1336 xfrm_state_check_expire(x1);
1340 spin_unlock_bh(&x1->lock);
1346 EXPORT_SYMBOL(xfrm_state_update);
1348 int xfrm_state_check_expire(struct xfrm_state *x)
1350 if (!x->curlft.use_time)
1351 x->curlft.use_time = get_seconds();
1353 if (x->km.state != XFRM_STATE_VALID)
1356 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1357 x->curlft.packets >= x->lft.hard_packet_limit) {
1358 x->km.state = XFRM_STATE_EXPIRED;
1359 mod_timer(&x->timer, jiffies);
1364 (x->curlft.bytes >= x->lft.soft_byte_limit ||
1365 x->curlft.packets >= x->lft.soft_packet_limit)) {
1367 km_state_expired(x, 0, 0);
1371 EXPORT_SYMBOL(xfrm_state_check_expire);
1374 xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto,
1375 unsigned short family)
1377 struct xfrm_state *x;
1379 spin_lock_bh(&xfrm_state_lock);
1380 x = __xfrm_state_lookup(daddr, spi, proto, family);
1381 spin_unlock_bh(&xfrm_state_lock);
1384 EXPORT_SYMBOL(xfrm_state_lookup);
1387 xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr,
1388 u8 proto, unsigned short family)
1390 struct xfrm_state *x;
1392 spin_lock_bh(&xfrm_state_lock);
1393 x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family);
1394 spin_unlock_bh(&xfrm_state_lock);
1397 EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1400 xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
1401 xfrm_address_t *daddr, xfrm_address_t *saddr,
1402 int create, unsigned short family)
1404 struct xfrm_state *x;
1406 spin_lock_bh(&xfrm_state_lock);
1407 x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create);
1408 spin_unlock_bh(&xfrm_state_lock);
1412 EXPORT_SYMBOL(xfrm_find_acq);
1414 #ifdef CONFIG_XFRM_SUB_POLICY
1416 xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1417 unsigned short family)
1420 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1422 return -EAFNOSUPPORT;
1424 spin_lock_bh(&xfrm_state_lock);
1425 if (afinfo->tmpl_sort)
1426 err = afinfo->tmpl_sort(dst, src, n);
1427 spin_unlock_bh(&xfrm_state_lock);
1428 xfrm_state_put_afinfo(afinfo);
1431 EXPORT_SYMBOL(xfrm_tmpl_sort);
1434 xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1435 unsigned short family)
1438 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1440 return -EAFNOSUPPORT;
1442 spin_lock_bh(&xfrm_state_lock);
1443 if (afinfo->state_sort)
1444 err = afinfo->state_sort(dst, src, n);
1445 spin_unlock_bh(&xfrm_state_lock);
1446 xfrm_state_put_afinfo(afinfo);
1449 EXPORT_SYMBOL(xfrm_state_sort);
1452 /* Silly enough, but I'm lazy to build resolution list */
1454 static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq)
1458 for (i = 0; i <= xfrm_state_hmask; i++) {
1459 struct hlist_node *entry;
1460 struct xfrm_state *x;
1462 hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
1463 if (x->km.seq == seq &&
1464 x->km.state == XFRM_STATE_ACQ) {
1473 struct xfrm_state *xfrm_find_acq_byseq(u32 seq)
1475 struct xfrm_state *x;
1477 spin_lock_bh(&xfrm_state_lock);
1478 x = __xfrm_find_acq_byseq(seq);
1479 spin_unlock_bh(&xfrm_state_lock);
1482 EXPORT_SYMBOL(xfrm_find_acq_byseq);
1484 u32 xfrm_get_acqseq(void)
1488 static DEFINE_SPINLOCK(acqseq_lock);
1490 spin_lock_bh(&acqseq_lock);
1491 res = (++acqseq ? : ++acqseq);
1492 spin_unlock_bh(&acqseq_lock);
1495 EXPORT_SYMBOL(xfrm_get_acqseq);
1497 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1500 struct xfrm_state *x0;
1502 __be32 minspi = htonl(low);
1503 __be32 maxspi = htonl(high);
1505 spin_lock_bh(&x->lock);
1506 if (x->km.state == XFRM_STATE_DEAD)
1515 if (minspi == maxspi) {
1516 x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family);
1524 for (h=0; h<high-low+1; h++) {
1525 spi = low + net_random()%(high-low+1);
1526 x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1528 x->id.spi = htonl(spi);
1535 spin_lock_bh(&xfrm_state_lock);
1536 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1537 hlist_add_head(&x->byspi, xfrm_state_byspi+h);
1538 spin_unlock_bh(&xfrm_state_lock);
1544 spin_unlock_bh(&x->lock);
1548 EXPORT_SYMBOL(xfrm_alloc_spi);
1550 int xfrm_state_walk(struct xfrm_state_walk *walk,
1551 int (*func)(struct xfrm_state *, int, void*),
1554 struct xfrm_state *old, *x, *last = NULL;
1557 if (walk->state == NULL && walk->count != 0)
1560 old = x = walk->state;
1562 spin_lock_bh(&xfrm_state_lock);
1564 x = list_first_entry(&xfrm_state_all, struct xfrm_state, all);
1565 list_for_each_entry_from(x, &xfrm_state_all, all) {
1566 if (x->km.state == XFRM_STATE_DEAD)
1568 if (!xfrm_id_proto_match(x->id.proto, walk->proto))
1571 err = func(last, walk->count, data);
1573 xfrm_state_hold(last);
1581 if (walk->count == 0) {
1586 err = func(last, 0, data);
1588 spin_unlock_bh(&xfrm_state_lock);
1590 xfrm_state_put(old);
1593 EXPORT_SYMBOL(xfrm_state_walk);
1596 void xfrm_replay_notify(struct xfrm_state *x, int event)
1599 /* we send notify messages in case
1600 * 1. we updated on of the sequence numbers, and the seqno difference
1601 * is at least x->replay_maxdiff, in this case we also update the
1602 * timeout of our timer function
1603 * 2. if x->replay_maxage has elapsed since last update,
1604 * and there were changes
1606 * The state structure must be locked!
1610 case XFRM_REPLAY_UPDATE:
1611 if (x->replay_maxdiff &&
1612 (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
1613 (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
1614 if (x->xflags & XFRM_TIME_DEFER)
1615 event = XFRM_REPLAY_TIMEOUT;
1622 case XFRM_REPLAY_TIMEOUT:
1623 if ((x->replay.seq == x->preplay.seq) &&
1624 (x->replay.bitmap == x->preplay.bitmap) &&
1625 (x->replay.oseq == x->preplay.oseq)) {
1626 x->xflags |= XFRM_TIME_DEFER;
1633 memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
1634 c.event = XFRM_MSG_NEWAE;
1635 c.data.aevent = event;
1636 km_state_notify(x, &c);
1638 if (x->replay_maxage &&
1639 !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
1640 x->xflags &= ~XFRM_TIME_DEFER;
1643 static void xfrm_replay_timer_handler(unsigned long data)
1645 struct xfrm_state *x = (struct xfrm_state*)data;
1647 spin_lock(&x->lock);
1649 if (x->km.state == XFRM_STATE_VALID) {
1650 if (xfrm_aevent_is_on())
1651 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
1653 x->xflags |= XFRM_TIME_DEFER;
1656 spin_unlock(&x->lock);
1659 int xfrm_replay_check(struct xfrm_state *x,
1660 struct sk_buff *skb, __be32 net_seq)
1663 u32 seq = ntohl(net_seq);
1665 if (unlikely(seq == 0))
1668 if (likely(seq > x->replay.seq))
1671 diff = x->replay.seq - seq;
1672 if (diff >= min_t(unsigned int, x->props.replay_window,
1673 sizeof(x->replay.bitmap) * 8)) {
1674 x->stats.replay_window++;
1678 if (x->replay.bitmap & (1U << diff)) {
1685 xfrm_audit_state_replay(x, skb, net_seq);
1689 void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
1692 u32 seq = ntohl(net_seq);
1694 if (seq > x->replay.seq) {
1695 diff = seq - x->replay.seq;
1696 if (diff < x->props.replay_window)
1697 x->replay.bitmap = ((x->replay.bitmap) << diff) | 1;
1699 x->replay.bitmap = 1;
1700 x->replay.seq = seq;
1702 diff = x->replay.seq - seq;
1703 x->replay.bitmap |= (1U << diff);
1706 if (xfrm_aevent_is_on())
1707 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1710 static LIST_HEAD(xfrm_km_list);
1711 static DEFINE_RWLOCK(xfrm_km_lock);
1713 void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1715 struct xfrm_mgr *km;
1717 read_lock(&xfrm_km_lock);
1718 list_for_each_entry(km, &xfrm_km_list, list)
1719 if (km->notify_policy)
1720 km->notify_policy(xp, dir, c);
1721 read_unlock(&xfrm_km_lock);
1724 void km_state_notify(struct xfrm_state *x, struct km_event *c)
1726 struct xfrm_mgr *km;
1727 read_lock(&xfrm_km_lock);
1728 list_for_each_entry(km, &xfrm_km_list, list)
1731 read_unlock(&xfrm_km_lock);
1734 EXPORT_SYMBOL(km_policy_notify);
1735 EXPORT_SYMBOL(km_state_notify);
1737 void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
1743 c.event = XFRM_MSG_EXPIRE;
1744 km_state_notify(x, &c);
1750 EXPORT_SYMBOL(km_state_expired);
1752 * We send to all registered managers regardless of failure
1753 * We are happy with one success
1755 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1757 int err = -EINVAL, acqret;
1758 struct xfrm_mgr *km;
1760 read_lock(&xfrm_km_lock);
1761 list_for_each_entry(km, &xfrm_km_list, list) {
1762 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1766 read_unlock(&xfrm_km_lock);
1769 EXPORT_SYMBOL(km_query);
1771 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1774 struct xfrm_mgr *km;
1776 read_lock(&xfrm_km_lock);
1777 list_for_each_entry(km, &xfrm_km_list, list) {
1778 if (km->new_mapping)
1779 err = km->new_mapping(x, ipaddr, sport);
1783 read_unlock(&xfrm_km_lock);
1786 EXPORT_SYMBOL(km_new_mapping);
1788 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1794 c.event = XFRM_MSG_POLEXPIRE;
1795 km_policy_notify(pol, dir, &c);
1800 EXPORT_SYMBOL(km_policy_expired);
1802 #ifdef CONFIG_XFRM_MIGRATE
1803 int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1804 struct xfrm_migrate *m, int num_migrate)
1808 struct xfrm_mgr *km;
1810 read_lock(&xfrm_km_lock);
1811 list_for_each_entry(km, &xfrm_km_list, list) {
1813 ret = km->migrate(sel, dir, type, m, num_migrate);
1818 read_unlock(&xfrm_km_lock);
1821 EXPORT_SYMBOL(km_migrate);
1824 int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
1828 struct xfrm_mgr *km;
1830 read_lock(&xfrm_km_lock);
1831 list_for_each_entry(km, &xfrm_km_list, list) {
1833 ret = km->report(proto, sel, addr);
1838 read_unlock(&xfrm_km_lock);
1841 EXPORT_SYMBOL(km_report);
1843 int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1847 struct xfrm_mgr *km;
1848 struct xfrm_policy *pol = NULL;
1850 if (optlen <= 0 || optlen > PAGE_SIZE)
1853 data = kmalloc(optlen, GFP_KERNEL);
1858 if (copy_from_user(data, optval, optlen))
1862 read_lock(&xfrm_km_lock);
1863 list_for_each_entry(km, &xfrm_km_list, list) {
1864 pol = km->compile_policy(sk, optname, data,
1869 read_unlock(&xfrm_km_lock);
1872 xfrm_sk_policy_insert(sk, err, pol);
1881 EXPORT_SYMBOL(xfrm_user_policy);
1883 int xfrm_register_km(struct xfrm_mgr *km)
1885 write_lock_bh(&xfrm_km_lock);
1886 list_add_tail(&km->list, &xfrm_km_list);
1887 write_unlock_bh(&xfrm_km_lock);
1890 EXPORT_SYMBOL(xfrm_register_km);
1892 int xfrm_unregister_km(struct xfrm_mgr *km)
1894 write_lock_bh(&xfrm_km_lock);
1895 list_del(&km->list);
1896 write_unlock_bh(&xfrm_km_lock);
1899 EXPORT_SYMBOL(xfrm_unregister_km);
1901 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1904 if (unlikely(afinfo == NULL))
1906 if (unlikely(afinfo->family >= NPROTO))
1907 return -EAFNOSUPPORT;
1908 write_lock_bh(&xfrm_state_afinfo_lock);
1909 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1912 xfrm_state_afinfo[afinfo->family] = afinfo;
1913 write_unlock_bh(&xfrm_state_afinfo_lock);
1916 EXPORT_SYMBOL(xfrm_state_register_afinfo);
1918 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1921 if (unlikely(afinfo == NULL))
1923 if (unlikely(afinfo->family >= NPROTO))
1924 return -EAFNOSUPPORT;
1925 write_lock_bh(&xfrm_state_afinfo_lock);
1926 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1927 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1930 xfrm_state_afinfo[afinfo->family] = NULL;
1932 write_unlock_bh(&xfrm_state_afinfo_lock);
1935 EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1937 static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1939 struct xfrm_state_afinfo *afinfo;
1940 if (unlikely(family >= NPROTO))
1942 read_lock(&xfrm_state_afinfo_lock);
1943 afinfo = xfrm_state_afinfo[family];
1944 if (unlikely(!afinfo))
1945 read_unlock(&xfrm_state_afinfo_lock);
1949 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1950 __releases(xfrm_state_afinfo_lock)
1952 read_unlock(&xfrm_state_afinfo_lock);
1955 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1956 void xfrm_state_delete_tunnel(struct xfrm_state *x)
1959 struct xfrm_state *t = x->tunnel;
1961 if (atomic_read(&t->tunnel_users) == 2)
1962 xfrm_state_delete(t);
1963 atomic_dec(&t->tunnel_users);
1968 EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1970 int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1974 spin_lock_bh(&x->lock);
1975 if (x->km.state == XFRM_STATE_VALID &&
1976 x->type && x->type->get_mtu)
1977 res = x->type->get_mtu(x, mtu);
1979 res = mtu - x->props.header_len;
1980 spin_unlock_bh(&x->lock);
1984 int xfrm_init_state(struct xfrm_state *x)
1986 struct xfrm_state_afinfo *afinfo;
1987 struct xfrm_mode *inner_mode;
1988 int family = x->props.family;
1991 err = -EAFNOSUPPORT;
1992 afinfo = xfrm_state_get_afinfo(family);
1997 if (afinfo->init_flags)
1998 err = afinfo->init_flags(x);
2000 xfrm_state_put_afinfo(afinfo);
2005 err = -EPROTONOSUPPORT;
2007 if (x->sel.family != AF_UNSPEC) {
2008 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2009 if (inner_mode == NULL)
2012 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2013 family != x->sel.family) {
2014 xfrm_put_mode(inner_mode);
2018 x->inner_mode = inner_mode;
2020 struct xfrm_mode *inner_mode_iaf;
2022 inner_mode = xfrm_get_mode(x->props.mode, AF_INET);
2023 if (inner_mode == NULL)
2026 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2027 xfrm_put_mode(inner_mode);
2031 inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6);
2032 if (inner_mode_iaf == NULL)
2035 if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) {
2036 xfrm_put_mode(inner_mode_iaf);
2040 if (x->props.family == AF_INET) {
2041 x->inner_mode = inner_mode;
2042 x->inner_mode_iaf = inner_mode_iaf;
2044 x->inner_mode = inner_mode_iaf;
2045 x->inner_mode_iaf = inner_mode;
2049 x->type = xfrm_get_type(x->id.proto, family);
2050 if (x->type == NULL)
2053 err = x->type->init_state(x);
2057 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2058 if (x->outer_mode == NULL)
2061 x->km.state = XFRM_STATE_VALID;
2067 EXPORT_SYMBOL(xfrm_init_state);
2069 void __init xfrm_state_init(void)
2073 sz = sizeof(struct hlist_head) * 8;
2075 xfrm_state_bydst = xfrm_hash_alloc(sz);
2076 xfrm_state_bysrc = xfrm_hash_alloc(sz);
2077 xfrm_state_byspi = xfrm_hash_alloc(sz);
2078 if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi)
2079 panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes.");
2080 xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
2082 INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task);
2085 #ifdef CONFIG_AUDITSYSCALL
2086 static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2087 struct audit_buffer *audit_buf)
2089 struct xfrm_sec_ctx *ctx = x->security;
2090 u32 spi = ntohl(x->id.spi);
2093 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
2094 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
2096 switch(x->props.family) {
2098 audit_log_format(audit_buf,
2099 " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
2100 NIPQUAD(x->props.saddr.a4),
2101 NIPQUAD(x->id.daddr.a4));
2104 audit_log_format(audit_buf,
2105 " src=" NIP6_FMT " dst=" NIP6_FMT,
2106 NIP6(*(struct in6_addr *)x->props.saddr.a6),
2107 NIP6(*(struct in6_addr *)x->id.daddr.a6));
2111 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2114 static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2115 struct audit_buffer *audit_buf)
2118 struct ipv6hdr *iph6;
2123 audit_log_format(audit_buf,
2124 " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
2125 NIPQUAD(iph4->saddr),
2126 NIPQUAD(iph4->daddr));
2129 iph6 = ipv6_hdr(skb);
2130 audit_log_format(audit_buf,
2131 " src=" NIP6_FMT " dst=" NIP6_FMT
2132 " flowlbl=0x%x%02x%02x",
2135 iph6->flow_lbl[0] & 0x0f,
2142 void xfrm_audit_state_add(struct xfrm_state *x, int result,
2143 uid_t auid, u32 sessionid, u32 secid)
2145 struct audit_buffer *audit_buf;
2147 audit_buf = xfrm_audit_start("SAD-add");
2148 if (audit_buf == NULL)
2150 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2151 xfrm_audit_helper_sainfo(x, audit_buf);
2152 audit_log_format(audit_buf, " res=%u", result);
2153 audit_log_end(audit_buf);
2155 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2157 void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2158 uid_t auid, u32 sessionid, u32 secid)
2160 struct audit_buffer *audit_buf;
2162 audit_buf = xfrm_audit_start("SAD-delete");
2163 if (audit_buf == NULL)
2165 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
2166 xfrm_audit_helper_sainfo(x, audit_buf);
2167 audit_log_format(audit_buf, " res=%u", result);
2168 audit_log_end(audit_buf);
2170 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
2172 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2173 struct sk_buff *skb)
2175 struct audit_buffer *audit_buf;
2178 audit_buf = xfrm_audit_start("SA-replay-overflow");
2179 if (audit_buf == NULL)
2181 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2182 /* don't record the sequence number because it's inherent in this kind
2183 * of audit message */
2184 spi = ntohl(x->id.spi);
2185 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2186 audit_log_end(audit_buf);
2188 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2190 static void xfrm_audit_state_replay(struct xfrm_state *x,
2191 struct sk_buff *skb, __be32 net_seq)
2193 struct audit_buffer *audit_buf;
2196 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2197 if (audit_buf == NULL)
2199 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2200 spi = ntohl(x->id.spi);
2201 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2202 spi, spi, ntohl(net_seq));
2203 audit_log_end(audit_buf);
2206 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2208 struct audit_buffer *audit_buf;
2210 audit_buf = xfrm_audit_start("SA-notfound");
2211 if (audit_buf == NULL)
2213 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2214 audit_log_end(audit_buf);
2216 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2218 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2219 __be32 net_spi, __be32 net_seq)
2221 struct audit_buffer *audit_buf;
2224 audit_buf = xfrm_audit_start("SA-notfound");
2225 if (audit_buf == NULL)
2227 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2228 spi = ntohl(net_spi);
2229 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2230 spi, spi, ntohl(net_seq));
2231 audit_log_end(audit_buf);
2233 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2235 void xfrm_audit_state_icvfail(struct xfrm_state *x,
2236 struct sk_buff *skb, u8 proto)
2238 struct audit_buffer *audit_buf;
2242 audit_buf = xfrm_audit_start("SA-icv-failure");
2243 if (audit_buf == NULL)
2245 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2246 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2247 u32 spi = ntohl(net_spi);
2248 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2249 spi, spi, ntohl(net_seq));
2251 audit_log_end(audit_buf);
2253 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
2254 #endif /* CONFIG_AUDITSYSCALL */