6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
16 #include <linux/workqueue.h>
18 #include <linux/pfkeyv2.h>
19 #include <linux/ipsec.h>
20 #include <linux/module.h>
21 #include <linux/cache.h>
22 #include <linux/audit.h>
23 #include <asm/uaccess.h>
24 #include <linux/ktime.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/kernel.h>
29 #include "xfrm_hash.h"
31 /* Each xfrm_state may be linked to two tables:
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
34 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
35 destination/tunnel endpoint. (output)
38 static DEFINE_SPINLOCK(xfrm_state_lock
);
40 static unsigned int xfrm_state_hashmax __read_mostly
= 1 * 1024 * 1024;
42 static struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
);
43 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
);
45 #ifdef CONFIG_AUDITSYSCALL
46 static void xfrm_audit_state_replay(struct xfrm_state
*x
,
47 struct sk_buff
*skb
, __be32 net_seq
);
49 #define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
50 #endif /* CONFIG_AUDITSYSCALL */
52 static inline unsigned int xfrm_dst_hash(struct net
*net
,
53 const xfrm_address_t
*daddr
,
54 const xfrm_address_t
*saddr
,
56 unsigned short family
)
58 return __xfrm_dst_hash(daddr
, saddr
, reqid
, family
, net
->xfrm
.state_hmask
);
61 static inline unsigned int xfrm_src_hash(struct net
*net
,
62 const xfrm_address_t
*daddr
,
63 const xfrm_address_t
*saddr
,
64 unsigned short family
)
66 return __xfrm_src_hash(daddr
, saddr
, family
, net
->xfrm
.state_hmask
);
69 static inline unsigned int
70 xfrm_spi_hash(struct net
*net
, const xfrm_address_t
*daddr
,
71 __be32 spi
, u8 proto
, unsigned short family
)
73 return __xfrm_spi_hash(daddr
, spi
, proto
, family
, net
->xfrm
.state_hmask
);
76 static void xfrm_hash_transfer(struct hlist_head
*list
,
77 struct hlist_head
*ndsttable
,
78 struct hlist_head
*nsrctable
,
79 struct hlist_head
*nspitable
,
80 unsigned int nhashmask
)
82 struct hlist_node
*entry
, *tmp
;
85 hlist_for_each_entry_safe(x
, entry
, tmp
, list
, bydst
) {
88 h
= __xfrm_dst_hash(&x
->id
.daddr
, &x
->props
.saddr
,
89 x
->props
.reqid
, x
->props
.family
,
91 hlist_add_head(&x
->bydst
, ndsttable
+h
);
93 h
= __xfrm_src_hash(&x
->id
.daddr
, &x
->props
.saddr
,
96 hlist_add_head(&x
->bysrc
, nsrctable
+h
);
99 h
= __xfrm_spi_hash(&x
->id
.daddr
, x
->id
.spi
,
100 x
->id
.proto
, x
->props
.family
,
102 hlist_add_head(&x
->byspi
, nspitable
+h
);
107 static unsigned long xfrm_hash_new_size(unsigned int state_hmask
)
109 return ((state_hmask
+ 1) << 1) * sizeof(struct hlist_head
);
112 static DEFINE_MUTEX(hash_resize_mutex
);
114 static void xfrm_hash_resize(struct work_struct
*work
)
116 struct net
*net
= container_of(work
, struct net
, xfrm
.state_hash_work
);
117 struct hlist_head
*ndst
, *nsrc
, *nspi
, *odst
, *osrc
, *ospi
;
118 unsigned long nsize
, osize
;
119 unsigned int nhashmask
, ohashmask
;
122 mutex_lock(&hash_resize_mutex
);
124 nsize
= xfrm_hash_new_size(net
->xfrm
.state_hmask
);
125 ndst
= xfrm_hash_alloc(nsize
);
128 nsrc
= xfrm_hash_alloc(nsize
);
130 xfrm_hash_free(ndst
, nsize
);
133 nspi
= xfrm_hash_alloc(nsize
);
135 xfrm_hash_free(ndst
, nsize
);
136 xfrm_hash_free(nsrc
, nsize
);
140 spin_lock_bh(&xfrm_state_lock
);
142 nhashmask
= (nsize
/ sizeof(struct hlist_head
)) - 1U;
143 for (i
= net
->xfrm
.state_hmask
; i
>= 0; i
--)
144 xfrm_hash_transfer(net
->xfrm
.state_bydst
+i
, ndst
, nsrc
, nspi
,
147 odst
= net
->xfrm
.state_bydst
;
148 osrc
= net
->xfrm
.state_bysrc
;
149 ospi
= net
->xfrm
.state_byspi
;
150 ohashmask
= net
->xfrm
.state_hmask
;
152 net
->xfrm
.state_bydst
= ndst
;
153 net
->xfrm
.state_bysrc
= nsrc
;
154 net
->xfrm
.state_byspi
= nspi
;
155 net
->xfrm
.state_hmask
= nhashmask
;
157 spin_unlock_bh(&xfrm_state_lock
);
159 osize
= (ohashmask
+ 1) * sizeof(struct hlist_head
);
160 xfrm_hash_free(odst
, osize
);
161 xfrm_hash_free(osrc
, osize
);
162 xfrm_hash_free(ospi
, osize
);
165 mutex_unlock(&hash_resize_mutex
);
168 static DEFINE_RWLOCK(xfrm_state_afinfo_lock
);
169 static struct xfrm_state_afinfo
*xfrm_state_afinfo
[NPROTO
];
171 static DEFINE_SPINLOCK(xfrm_state_gc_lock
);
173 int __xfrm_state_delete(struct xfrm_state
*x
);
175 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
176 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
178 static struct xfrm_state_afinfo
*xfrm_state_lock_afinfo(unsigned int family
)
180 struct xfrm_state_afinfo
*afinfo
;
181 if (unlikely(family
>= NPROTO
))
183 write_lock_bh(&xfrm_state_afinfo_lock
);
184 afinfo
= xfrm_state_afinfo
[family
];
185 if (unlikely(!afinfo
))
186 write_unlock_bh(&xfrm_state_afinfo_lock
);
190 static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo
*afinfo
)
191 __releases(xfrm_state_afinfo_lock
)
193 write_unlock_bh(&xfrm_state_afinfo_lock
);
196 int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
)
198 struct xfrm_state_afinfo
*afinfo
= xfrm_state_lock_afinfo(family
);
199 const struct xfrm_type
**typemap
;
202 if (unlikely(afinfo
== NULL
))
203 return -EAFNOSUPPORT
;
204 typemap
= afinfo
->type_map
;
206 if (likely(typemap
[type
->proto
] == NULL
))
207 typemap
[type
->proto
] = type
;
210 xfrm_state_unlock_afinfo(afinfo
);
213 EXPORT_SYMBOL(xfrm_register_type
);
215 int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
)
217 struct xfrm_state_afinfo
*afinfo
= xfrm_state_lock_afinfo(family
);
218 const struct xfrm_type
**typemap
;
221 if (unlikely(afinfo
== NULL
))
222 return -EAFNOSUPPORT
;
223 typemap
= afinfo
->type_map
;
225 if (unlikely(typemap
[type
->proto
] != type
))
228 typemap
[type
->proto
] = NULL
;
229 xfrm_state_unlock_afinfo(afinfo
);
232 EXPORT_SYMBOL(xfrm_unregister_type
);
234 static const struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
)
236 struct xfrm_state_afinfo
*afinfo
;
237 const struct xfrm_type
**typemap
;
238 const struct xfrm_type
*type
;
239 int modload_attempted
= 0;
242 afinfo
= xfrm_state_get_afinfo(family
);
243 if (unlikely(afinfo
== NULL
))
245 typemap
= afinfo
->type_map
;
247 type
= typemap
[proto
];
248 if (unlikely(type
&& !try_module_get(type
->owner
)))
250 if (!type
&& !modload_attempted
) {
251 xfrm_state_put_afinfo(afinfo
);
252 request_module("xfrm-type-%d-%d", family
, proto
);
253 modload_attempted
= 1;
257 xfrm_state_put_afinfo(afinfo
);
261 static void xfrm_put_type(const struct xfrm_type
*type
)
263 module_put(type
->owner
);
266 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
)
268 struct xfrm_state_afinfo
*afinfo
;
269 struct xfrm_mode
**modemap
;
272 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
275 afinfo
= xfrm_state_lock_afinfo(family
);
276 if (unlikely(afinfo
== NULL
))
277 return -EAFNOSUPPORT
;
280 modemap
= afinfo
->mode_map
;
281 if (modemap
[mode
->encap
])
285 if (!try_module_get(afinfo
->owner
))
288 mode
->afinfo
= afinfo
;
289 modemap
[mode
->encap
] = mode
;
293 xfrm_state_unlock_afinfo(afinfo
);
296 EXPORT_SYMBOL(xfrm_register_mode
);
298 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
)
300 struct xfrm_state_afinfo
*afinfo
;
301 struct xfrm_mode
**modemap
;
304 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
307 afinfo
= xfrm_state_lock_afinfo(family
);
308 if (unlikely(afinfo
== NULL
))
309 return -EAFNOSUPPORT
;
312 modemap
= afinfo
->mode_map
;
313 if (likely(modemap
[mode
->encap
] == mode
)) {
314 modemap
[mode
->encap
] = NULL
;
315 module_put(mode
->afinfo
->owner
);
319 xfrm_state_unlock_afinfo(afinfo
);
322 EXPORT_SYMBOL(xfrm_unregister_mode
);
324 static struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
)
326 struct xfrm_state_afinfo
*afinfo
;
327 struct xfrm_mode
*mode
;
328 int modload_attempted
= 0;
330 if (unlikely(encap
>= XFRM_MODE_MAX
))
334 afinfo
= xfrm_state_get_afinfo(family
);
335 if (unlikely(afinfo
== NULL
))
338 mode
= afinfo
->mode_map
[encap
];
339 if (unlikely(mode
&& !try_module_get(mode
->owner
)))
341 if (!mode
&& !modload_attempted
) {
342 xfrm_state_put_afinfo(afinfo
);
343 request_module("xfrm-mode-%d-%d", family
, encap
);
344 modload_attempted
= 1;
348 xfrm_state_put_afinfo(afinfo
);
352 static void xfrm_put_mode(struct xfrm_mode
*mode
)
354 module_put(mode
->owner
);
357 static void xfrm_state_gc_destroy(struct xfrm_state
*x
)
359 tasklet_hrtimer_cancel(&x
->mtimer
);
360 del_timer_sync(&x
->rtimer
);
367 xfrm_put_mode(x
->inner_mode
);
368 if (x
->inner_mode_iaf
)
369 xfrm_put_mode(x
->inner_mode_iaf
);
371 xfrm_put_mode(x
->outer_mode
);
373 x
->type
->destructor(x
);
374 xfrm_put_type(x
->type
);
376 security_xfrm_state_free(x
);
380 static void xfrm_state_gc_task(struct work_struct
*work
)
382 struct net
*net
= container_of(work
, struct net
, xfrm
.state_gc_work
);
383 struct xfrm_state
*x
;
384 struct hlist_node
*entry
, *tmp
;
385 struct hlist_head gc_list
;
387 spin_lock_bh(&xfrm_state_gc_lock
);
388 hlist_move_list(&net
->xfrm
.state_gc_list
, &gc_list
);
389 spin_unlock_bh(&xfrm_state_gc_lock
);
391 hlist_for_each_entry_safe(x
, entry
, tmp
, &gc_list
, gclist
)
392 xfrm_state_gc_destroy(x
);
394 wake_up(&net
->xfrm
.km_waitq
);
397 static inline unsigned long make_jiffies(long secs
)
399 if (secs
>= (MAX_SCHEDULE_TIMEOUT
-1)/HZ
)
400 return MAX_SCHEDULE_TIMEOUT
-1;
405 static enum hrtimer_restart
xfrm_timer_handler(struct hrtimer
* me
)
407 struct tasklet_hrtimer
*thr
= container_of(me
, struct tasklet_hrtimer
, timer
);
408 struct xfrm_state
*x
= container_of(thr
, struct xfrm_state
, mtimer
);
409 struct net
*net
= xs_net(x
);
410 unsigned long now
= get_seconds();
411 long next
= LONG_MAX
;
416 if (x
->km
.state
== XFRM_STATE_DEAD
)
418 if (x
->km
.state
== XFRM_STATE_EXPIRED
)
420 if (x
->lft
.hard_add_expires_seconds
) {
421 long tmo
= x
->lft
.hard_add_expires_seconds
+
422 x
->curlft
.add_time
- now
;
428 if (x
->lft
.hard_use_expires_seconds
) {
429 long tmo
= x
->lft
.hard_use_expires_seconds
+
430 (x
->curlft
.use_time
? : now
) - now
;
438 if (x
->lft
.soft_add_expires_seconds
) {
439 long tmo
= x
->lft
.soft_add_expires_seconds
+
440 x
->curlft
.add_time
- now
;
446 if (x
->lft
.soft_use_expires_seconds
) {
447 long tmo
= x
->lft
.soft_use_expires_seconds
+
448 (x
->curlft
.use_time
? : now
) - now
;
457 km_state_expired(x
, 0, 0);
459 if (next
!= LONG_MAX
){
460 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(next
, 0), HRTIMER_MODE_REL
);
466 if (x
->km
.state
== XFRM_STATE_ACQ
&& x
->id
.spi
== 0) {
467 x
->km
.state
= XFRM_STATE_EXPIRED
;
468 wake_up(&net
->xfrm
.km_waitq
);
473 err
= __xfrm_state_delete(x
);
474 if (!err
&& x
->id
.spi
)
475 km_state_expired(x
, 1, 0);
477 xfrm_audit_state_delete(x
, err
? 0 : 1,
478 audit_get_loginuid(current
),
479 audit_get_sessionid(current
), 0);
482 spin_unlock(&x
->lock
);
483 return HRTIMER_NORESTART
;
486 static void xfrm_replay_timer_handler(unsigned long data
);
488 struct xfrm_state
*xfrm_state_alloc(struct net
*net
)
490 struct xfrm_state
*x
;
492 x
= kzalloc(sizeof(struct xfrm_state
), GFP_ATOMIC
);
495 write_pnet(&x
->xs_net
, net
);
496 atomic_set(&x
->refcnt
, 1);
497 atomic_set(&x
->tunnel_users
, 0);
498 INIT_LIST_HEAD(&x
->km
.all
);
499 INIT_HLIST_NODE(&x
->bydst
);
500 INIT_HLIST_NODE(&x
->bysrc
);
501 INIT_HLIST_NODE(&x
->byspi
);
502 tasklet_hrtimer_init(&x
->mtimer
, xfrm_timer_handler
, CLOCK_REALTIME
, HRTIMER_MODE_ABS
);
503 setup_timer(&x
->rtimer
, xfrm_replay_timer_handler
,
505 x
->curlft
.add_time
= get_seconds();
506 x
->lft
.soft_byte_limit
= XFRM_INF
;
507 x
->lft
.soft_packet_limit
= XFRM_INF
;
508 x
->lft
.hard_byte_limit
= XFRM_INF
;
509 x
->lft
.hard_packet_limit
= XFRM_INF
;
510 x
->replay_maxage
= 0;
511 x
->replay_maxdiff
= 0;
512 x
->inner_mode
= NULL
;
513 x
->inner_mode_iaf
= NULL
;
514 spin_lock_init(&x
->lock
);
518 EXPORT_SYMBOL(xfrm_state_alloc
);
520 void __xfrm_state_destroy(struct xfrm_state
*x
)
522 struct net
*net
= xs_net(x
);
524 WARN_ON(x
->km
.state
!= XFRM_STATE_DEAD
);
526 spin_lock_bh(&xfrm_state_gc_lock
);
527 hlist_add_head(&x
->gclist
, &net
->xfrm
.state_gc_list
);
528 spin_unlock_bh(&xfrm_state_gc_lock
);
529 schedule_work(&net
->xfrm
.state_gc_work
);
531 EXPORT_SYMBOL(__xfrm_state_destroy
);
533 int __xfrm_state_delete(struct xfrm_state
*x
)
535 struct net
*net
= xs_net(x
);
538 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
539 x
->km
.state
= XFRM_STATE_DEAD
;
540 spin_lock(&xfrm_state_lock
);
541 list_del(&x
->km
.all
);
542 hlist_del(&x
->bydst
);
543 hlist_del(&x
->bysrc
);
545 hlist_del(&x
->byspi
);
546 net
->xfrm
.state_num
--;
547 spin_unlock(&xfrm_state_lock
);
549 /* All xfrm_state objects are created by xfrm_state_alloc.
550 * The xfrm_state_alloc call gives a reference, and that
551 * is what we are dropping here.
559 EXPORT_SYMBOL(__xfrm_state_delete
);
561 int xfrm_state_delete(struct xfrm_state
*x
)
565 spin_lock_bh(&x
->lock
);
566 err
= __xfrm_state_delete(x
);
567 spin_unlock_bh(&x
->lock
);
571 EXPORT_SYMBOL(xfrm_state_delete
);
573 #ifdef CONFIG_SECURITY_NETWORK_XFRM
575 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
)
579 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
580 struct hlist_node
*entry
;
581 struct xfrm_state
*x
;
583 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+i
, bydst
) {
584 if (xfrm_id_proto_match(x
->id
.proto
, proto
) &&
585 (err
= security_xfrm_state_delete(x
)) != 0) {
586 xfrm_audit_state_delete(x
, 0,
587 audit_info
->loginuid
,
588 audit_info
->sessionid
,
599 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
)
605 int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
)
607 int i
, err
= 0, cnt
= 0;
609 spin_lock_bh(&xfrm_state_lock
);
610 err
= xfrm_state_flush_secctx_check(net
, proto
, audit_info
);
615 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
616 struct hlist_node
*entry
;
617 struct xfrm_state
*x
;
619 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+i
, bydst
) {
620 if (!xfrm_state_kern(x
) &&
621 xfrm_id_proto_match(x
->id
.proto
, proto
)) {
623 spin_unlock_bh(&xfrm_state_lock
);
625 err
= xfrm_state_delete(x
);
626 xfrm_audit_state_delete(x
, err
? 0 : 1,
627 audit_info
->loginuid
,
628 audit_info
->sessionid
,
634 spin_lock_bh(&xfrm_state_lock
);
643 spin_unlock_bh(&xfrm_state_lock
);
644 wake_up(&net
->xfrm
.km_waitq
);
647 EXPORT_SYMBOL(xfrm_state_flush
);
649 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
)
651 spin_lock_bh(&xfrm_state_lock
);
652 si
->sadcnt
= net
->xfrm
.state_num
;
653 si
->sadhcnt
= net
->xfrm
.state_hmask
;
654 si
->sadhmcnt
= xfrm_state_hashmax
;
655 spin_unlock_bh(&xfrm_state_lock
);
657 EXPORT_SYMBOL(xfrm_sad_getinfo
);
660 xfrm_init_tempstate(struct xfrm_state
*x
, const struct flowi
*fl
,
661 struct xfrm_tmpl
*tmpl
,
662 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
663 unsigned short family
)
665 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
668 afinfo
->init_tempsel(&x
->sel
, fl
);
670 if (family
!= tmpl
->encap_family
) {
671 xfrm_state_put_afinfo(afinfo
);
672 afinfo
= xfrm_state_get_afinfo(tmpl
->encap_family
);
676 afinfo
->init_temprop(x
, tmpl
, daddr
, saddr
);
677 xfrm_state_put_afinfo(afinfo
);
681 static struct xfrm_state
*__xfrm_state_lookup(struct net
*net
, u32 mark
, xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
)
683 unsigned int h
= xfrm_spi_hash(net
, daddr
, spi
, proto
, family
);
684 struct xfrm_state
*x
;
685 struct hlist_node
*entry
;
687 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_byspi
+h
, byspi
) {
688 if (x
->props
.family
!= family
||
690 x
->id
.proto
!= proto
||
691 xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
))
694 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
703 static struct xfrm_state
*__xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
, xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
)
705 unsigned int h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
706 struct xfrm_state
*x
;
707 struct hlist_node
*entry
;
709 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bysrc
+h
, bysrc
) {
710 if (x
->props
.family
!= family
||
711 x
->id
.proto
!= proto
||
712 xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
) ||
713 xfrm_addr_cmp(&x
->props
.saddr
, saddr
, family
))
716 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
725 static inline struct xfrm_state
*
726 __xfrm_state_locate(struct xfrm_state
*x
, int use_spi
, int family
)
728 struct net
*net
= xs_net(x
);
729 u32 mark
= x
->mark
.v
& x
->mark
.m
;
732 return __xfrm_state_lookup(net
, mark
, &x
->id
.daddr
,
733 x
->id
.spi
, x
->id
.proto
, family
);
735 return __xfrm_state_lookup_byaddr(net
, mark
,
738 x
->id
.proto
, family
);
741 static void xfrm_hash_grow_check(struct net
*net
, int have_hash_collision
)
743 if (have_hash_collision
&&
744 (net
->xfrm
.state_hmask
+ 1) < xfrm_state_hashmax
&&
745 net
->xfrm
.state_num
> net
->xfrm
.state_hmask
)
746 schedule_work(&net
->xfrm
.state_hash_work
);
749 static void xfrm_state_look_at(struct xfrm_policy
*pol
, struct xfrm_state
*x
,
750 const struct flowi
*fl
, unsigned short family
,
751 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
752 struct xfrm_state
**best
, int *acq_in_progress
,
756 * 1. There is a valid state with matching selector. Done.
757 * 2. Valid state with inappropriate selector. Skip.
759 * Entering area of "sysdeps".
761 * 3. If state is not valid, selector is temporary, it selects
762 * only session which triggered previous resolution. Key
763 * manager will do something to install a state with proper
766 if (x
->km
.state
== XFRM_STATE_VALID
) {
767 if ((x
->sel
.family
&&
768 !xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
)) ||
769 !security_xfrm_state_pol_flow_match(x
, pol
, fl
))
773 (*best
)->km
.dying
> x
->km
.dying
||
774 ((*best
)->km
.dying
== x
->km
.dying
&&
775 (*best
)->curlft
.add_time
< x
->curlft
.add_time
))
777 } else if (x
->km
.state
== XFRM_STATE_ACQ
) {
778 *acq_in_progress
= 1;
779 } else if (x
->km
.state
== XFRM_STATE_ERROR
||
780 x
->km
.state
== XFRM_STATE_EXPIRED
) {
781 if (xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
) &&
782 security_xfrm_state_pol_flow_match(x
, pol
, fl
))
788 xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
789 const struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
790 struct xfrm_policy
*pol
, int *err
,
791 unsigned short family
)
793 static xfrm_address_t saddr_wildcard
= { };
794 struct net
*net
= xp_net(pol
);
795 unsigned int h
, h_wildcard
;
796 struct hlist_node
*entry
;
797 struct xfrm_state
*x
, *x0
, *to_put
;
798 int acquire_in_progress
= 0;
800 struct xfrm_state
*best
= NULL
;
801 u32 mark
= pol
->mark
.v
& pol
->mark
.m
;
802 unsigned short encap_family
= tmpl
->encap_family
;
806 spin_lock_bh(&xfrm_state_lock
);
807 h
= xfrm_dst_hash(net
, daddr
, saddr
, tmpl
->reqid
, encap_family
);
808 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+h
, bydst
) {
809 if (x
->props
.family
== encap_family
&&
810 x
->props
.reqid
== tmpl
->reqid
&&
811 (mark
& x
->mark
.m
) == x
->mark
.v
&&
812 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
813 xfrm_state_addr_check(x
, daddr
, saddr
, encap_family
) &&
814 tmpl
->mode
== x
->props
.mode
&&
815 tmpl
->id
.proto
== x
->id
.proto
&&
816 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
817 xfrm_state_look_at(pol
, x
, fl
, encap_family
, daddr
, saddr
,
818 &best
, &acquire_in_progress
, &error
);
823 h_wildcard
= xfrm_dst_hash(net
, daddr
, &saddr_wildcard
, tmpl
->reqid
, encap_family
);
824 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+h_wildcard
, bydst
) {
825 if (x
->props
.family
== encap_family
&&
826 x
->props
.reqid
== tmpl
->reqid
&&
827 (mark
& x
->mark
.m
) == x
->mark
.v
&&
828 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
829 xfrm_state_addr_check(x
, daddr
, saddr
, encap_family
) &&
830 tmpl
->mode
== x
->props
.mode
&&
831 tmpl
->id
.proto
== x
->id
.proto
&&
832 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
833 xfrm_state_look_at(pol
, x
, fl
, encap_family
, daddr
, saddr
,
834 &best
, &acquire_in_progress
, &error
);
839 if (!x
&& !error
&& !acquire_in_progress
) {
841 (x0
= __xfrm_state_lookup(net
, mark
, daddr
, tmpl
->id
.spi
,
842 tmpl
->id
.proto
, encap_family
)) != NULL
) {
847 x
= xfrm_state_alloc(net
);
852 /* Initialize temporary state matching only
853 * to current session. */
854 xfrm_init_tempstate(x
, fl
, tmpl
, daddr
, saddr
, family
);
855 memcpy(&x
->mark
, &pol
->mark
, sizeof(x
->mark
));
857 error
= security_xfrm_state_alloc_acquire(x
, pol
->security
, fl
->secid
);
859 x
->km
.state
= XFRM_STATE_DEAD
;
865 if (km_query(x
, tmpl
, pol
) == 0) {
866 x
->km
.state
= XFRM_STATE_ACQ
;
867 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
868 hlist_add_head(&x
->bydst
, net
->xfrm
.state_bydst
+h
);
869 h
= xfrm_src_hash(net
, daddr
, saddr
, encap_family
);
870 hlist_add_head(&x
->bysrc
, net
->xfrm
.state_bysrc
+h
);
872 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, encap_family
);
873 hlist_add_head(&x
->byspi
, net
->xfrm
.state_byspi
+h
);
875 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
876 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
877 net
->xfrm
.state_num
++;
878 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
880 x
->km
.state
= XFRM_STATE_DEAD
;
890 *err
= acquire_in_progress
? -EAGAIN
: error
;
891 spin_unlock_bh(&xfrm_state_lock
);
893 xfrm_state_put(to_put
);
898 xfrm_stateonly_find(struct net
*net
, u32 mark
,
899 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
900 unsigned short family
, u8 mode
, u8 proto
, u32 reqid
)
903 struct xfrm_state
*rx
= NULL
, *x
= NULL
;
904 struct hlist_node
*entry
;
906 spin_lock(&xfrm_state_lock
);
907 h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
908 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+h
, bydst
) {
909 if (x
->props
.family
== family
&&
910 x
->props
.reqid
== reqid
&&
911 (mark
& x
->mark
.m
) == x
->mark
.v
&&
912 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
913 xfrm_state_addr_check(x
, daddr
, saddr
, family
) &&
914 mode
== x
->props
.mode
&&
915 proto
== x
->id
.proto
&&
916 x
->km
.state
== XFRM_STATE_VALID
) {
924 spin_unlock(&xfrm_state_lock
);
929 EXPORT_SYMBOL(xfrm_stateonly_find
);
931 static void __xfrm_state_insert(struct xfrm_state
*x
)
933 struct net
*net
= xs_net(x
);
936 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
938 h
= xfrm_dst_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
,
939 x
->props
.reqid
, x
->props
.family
);
940 hlist_add_head(&x
->bydst
, net
->xfrm
.state_bydst
+h
);
942 h
= xfrm_src_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
, x
->props
.family
);
943 hlist_add_head(&x
->bysrc
, net
->xfrm
.state_bysrc
+h
);
946 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
,
949 hlist_add_head(&x
->byspi
, net
->xfrm
.state_byspi
+h
);
952 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
953 if (x
->replay_maxage
)
954 mod_timer(&x
->rtimer
, jiffies
+ x
->replay_maxage
);
956 wake_up(&net
->xfrm
.km_waitq
);
958 net
->xfrm
.state_num
++;
960 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
963 /* xfrm_state_lock is held */
964 static void __xfrm_state_bump_genids(struct xfrm_state
*xnew
)
966 struct net
*net
= xs_net(xnew
);
967 unsigned short family
= xnew
->props
.family
;
968 u32 reqid
= xnew
->props
.reqid
;
969 struct xfrm_state
*x
;
970 struct hlist_node
*entry
;
972 u32 mark
= xnew
->mark
.v
& xnew
->mark
.m
;
974 h
= xfrm_dst_hash(net
, &xnew
->id
.daddr
, &xnew
->props
.saddr
, reqid
, family
);
975 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+h
, bydst
) {
976 if (x
->props
.family
== family
&&
977 x
->props
.reqid
== reqid
&&
978 (mark
& x
->mark
.m
) == x
->mark
.v
&&
979 !xfrm_addr_cmp(&x
->id
.daddr
, &xnew
->id
.daddr
, family
) &&
980 !xfrm_addr_cmp(&x
->props
.saddr
, &xnew
->props
.saddr
, family
))
985 void xfrm_state_insert(struct xfrm_state
*x
)
987 spin_lock_bh(&xfrm_state_lock
);
988 __xfrm_state_bump_genids(x
);
989 __xfrm_state_insert(x
);
990 spin_unlock_bh(&xfrm_state_lock
);
992 EXPORT_SYMBOL(xfrm_state_insert
);
994 /* xfrm_state_lock is held */
995 static struct xfrm_state
*__find_acq_core(struct net
*net
, struct xfrm_mark
*m
, unsigned short family
, u8 mode
, u32 reqid
, u8 proto
, xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, int create
)
997 unsigned int h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
998 struct hlist_node
*entry
;
999 struct xfrm_state
*x
;
1000 u32 mark
= m
->v
& m
->m
;
1002 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+h
, bydst
) {
1003 if (x
->props
.reqid
!= reqid
||
1004 x
->props
.mode
!= mode
||
1005 x
->props
.family
!= family
||
1006 x
->km
.state
!= XFRM_STATE_ACQ
||
1008 x
->id
.proto
!= proto
||
1009 (mark
& x
->mark
.m
) != x
->mark
.v
||
1010 xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
) ||
1011 xfrm_addr_cmp(&x
->props
.saddr
, saddr
, family
))
1021 x
= xfrm_state_alloc(net
);
1025 x
->sel
.daddr
.a4
= daddr
->a4
;
1026 x
->sel
.saddr
.a4
= saddr
->a4
;
1027 x
->sel
.prefixlen_d
= 32;
1028 x
->sel
.prefixlen_s
= 32;
1029 x
->props
.saddr
.a4
= saddr
->a4
;
1030 x
->id
.daddr
.a4
= daddr
->a4
;
1034 ipv6_addr_copy((struct in6_addr
*)x
->sel
.daddr
.a6
,
1035 (struct in6_addr
*)daddr
);
1036 ipv6_addr_copy((struct in6_addr
*)x
->sel
.saddr
.a6
,
1037 (struct in6_addr
*)saddr
);
1038 x
->sel
.prefixlen_d
= 128;
1039 x
->sel
.prefixlen_s
= 128;
1040 ipv6_addr_copy((struct in6_addr
*)x
->props
.saddr
.a6
,
1041 (struct in6_addr
*)saddr
);
1042 ipv6_addr_copy((struct in6_addr
*)x
->id
.daddr
.a6
,
1043 (struct in6_addr
*)daddr
);
1047 x
->km
.state
= XFRM_STATE_ACQ
;
1048 x
->id
.proto
= proto
;
1049 x
->props
.family
= family
;
1050 x
->props
.mode
= mode
;
1051 x
->props
.reqid
= reqid
;
1054 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
1056 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
1057 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
1058 hlist_add_head(&x
->bydst
, net
->xfrm
.state_bydst
+h
);
1059 h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
1060 hlist_add_head(&x
->bysrc
, net
->xfrm
.state_bysrc
+h
);
1062 net
->xfrm
.state_num
++;
1064 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1070 static struct xfrm_state
*__xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1072 int xfrm_state_add(struct xfrm_state
*x
)
1074 struct net
*net
= xs_net(x
);
1075 struct xfrm_state
*x1
, *to_put
;
1078 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1079 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1081 family
= x
->props
.family
;
1085 spin_lock_bh(&xfrm_state_lock
);
1087 x1
= __xfrm_state_locate(x
, use_spi
, family
);
1095 if (use_spi
&& x
->km
.seq
) {
1096 x1
= __xfrm_find_acq_byseq(net
, mark
, x
->km
.seq
);
1097 if (x1
&& ((x1
->id
.proto
!= x
->id
.proto
) ||
1098 xfrm_addr_cmp(&x1
->id
.daddr
, &x
->id
.daddr
, family
))) {
1105 x1
= __find_acq_core(net
, &x
->mark
, family
, x
->props
.mode
,
1106 x
->props
.reqid
, x
->id
.proto
,
1107 &x
->id
.daddr
, &x
->props
.saddr
, 0);
1109 __xfrm_state_bump_genids(x
);
1110 __xfrm_state_insert(x
);
1114 spin_unlock_bh(&xfrm_state_lock
);
1117 xfrm_state_delete(x1
);
1122 xfrm_state_put(to_put
);
1126 EXPORT_SYMBOL(xfrm_state_add
);
1128 #ifdef CONFIG_XFRM_MIGRATE
1129 static struct xfrm_state
*xfrm_state_clone(struct xfrm_state
*orig
, int *errp
)
1131 struct net
*net
= xs_net(orig
);
1133 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1137 memcpy(&x
->id
, &orig
->id
, sizeof(x
->id
));
1138 memcpy(&x
->sel
, &orig
->sel
, sizeof(x
->sel
));
1139 memcpy(&x
->lft
, &orig
->lft
, sizeof(x
->lft
));
1140 x
->props
.mode
= orig
->props
.mode
;
1141 x
->props
.replay_window
= orig
->props
.replay_window
;
1142 x
->props
.reqid
= orig
->props
.reqid
;
1143 x
->props
.family
= orig
->props
.family
;
1144 x
->props
.saddr
= orig
->props
.saddr
;
1147 x
->aalg
= xfrm_algo_auth_clone(orig
->aalg
);
1151 x
->props
.aalgo
= orig
->props
.aalgo
;
1154 x
->ealg
= xfrm_algo_clone(orig
->ealg
);
1158 x
->props
.ealgo
= orig
->props
.ealgo
;
1161 x
->calg
= xfrm_algo_clone(orig
->calg
);
1165 x
->props
.calgo
= orig
->props
.calgo
;
1168 x
->encap
= kmemdup(orig
->encap
, sizeof(*x
->encap
), GFP_KERNEL
);
1174 x
->coaddr
= kmemdup(orig
->coaddr
, sizeof(*x
->coaddr
),
1180 memcpy(&x
->mark
, &orig
->mark
, sizeof(x
->mark
));
1182 err
= xfrm_init_state(x
);
1186 x
->props
.flags
= orig
->props
.flags
;
1188 x
->curlft
.add_time
= orig
->curlft
.add_time
;
1189 x
->km
.state
= orig
->km
.state
;
1190 x
->km
.seq
= orig
->km
.seq
;
1202 /* xfrm_state_lock is held */
1203 struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
)
1206 struct xfrm_state
*x
;
1207 struct hlist_node
*entry
;
1210 h
= xfrm_dst_hash(&init_net
, &m
->old_daddr
, &m
->old_saddr
,
1211 m
->reqid
, m
->old_family
);
1212 hlist_for_each_entry(x
, entry
, init_net
.xfrm
.state_bydst
+h
, bydst
) {
1213 if (x
->props
.mode
!= m
->mode
||
1214 x
->id
.proto
!= m
->proto
)
1216 if (m
->reqid
&& x
->props
.reqid
!= m
->reqid
)
1218 if (xfrm_addr_cmp(&x
->id
.daddr
, &m
->old_daddr
,
1220 xfrm_addr_cmp(&x
->props
.saddr
, &m
->old_saddr
,
1227 h
= xfrm_src_hash(&init_net
, &m
->old_daddr
, &m
->old_saddr
,
1229 hlist_for_each_entry(x
, entry
, init_net
.xfrm
.state_bysrc
+h
, bysrc
) {
1230 if (x
->props
.mode
!= m
->mode
||
1231 x
->id
.proto
!= m
->proto
)
1233 if (xfrm_addr_cmp(&x
->id
.daddr
, &m
->old_daddr
,
1235 xfrm_addr_cmp(&x
->props
.saddr
, &m
->old_saddr
,
1245 EXPORT_SYMBOL(xfrm_migrate_state_find
);
1247 struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1248 struct xfrm_migrate
*m
)
1250 struct xfrm_state
*xc
;
1253 xc
= xfrm_state_clone(x
, &err
);
1257 memcpy(&xc
->id
.daddr
, &m
->new_daddr
, sizeof(xc
->id
.daddr
));
1258 memcpy(&xc
->props
.saddr
, &m
->new_saddr
, sizeof(xc
->props
.saddr
));
1261 if (!xfrm_addr_cmp(&x
->id
.daddr
, &m
->new_daddr
, m
->new_family
)) {
1262 /* a care is needed when the destination address of the
1263 state is to be updated as it is a part of triplet */
1264 xfrm_state_insert(xc
);
1266 if ((err
= xfrm_state_add(xc
)) < 0)
1275 EXPORT_SYMBOL(xfrm_state_migrate
);
1278 int xfrm_state_update(struct xfrm_state
*x
)
1280 struct xfrm_state
*x1
, *to_put
;
1282 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1286 spin_lock_bh(&xfrm_state_lock
);
1287 x1
= __xfrm_state_locate(x
, use_spi
, x
->props
.family
);
1293 if (xfrm_state_kern(x1
)) {
1299 if (x1
->km
.state
== XFRM_STATE_ACQ
) {
1300 __xfrm_state_insert(x
);
1306 spin_unlock_bh(&xfrm_state_lock
);
1309 xfrm_state_put(to_put
);
1315 xfrm_state_delete(x1
);
1321 spin_lock_bh(&x1
->lock
);
1322 if (likely(x1
->km
.state
== XFRM_STATE_VALID
)) {
1323 if (x
->encap
&& x1
->encap
)
1324 memcpy(x1
->encap
, x
->encap
, sizeof(*x1
->encap
));
1325 if (x
->coaddr
&& x1
->coaddr
) {
1326 memcpy(x1
->coaddr
, x
->coaddr
, sizeof(*x1
->coaddr
));
1328 if (!use_spi
&& memcmp(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
)))
1329 memcpy(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
));
1330 memcpy(&x1
->lft
, &x
->lft
, sizeof(x1
->lft
));
1333 tasklet_hrtimer_start(&x1
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
1334 if (x1
->curlft
.use_time
)
1335 xfrm_state_check_expire(x1
);
1339 spin_unlock_bh(&x1
->lock
);
1345 EXPORT_SYMBOL(xfrm_state_update
);
1347 int xfrm_state_check_expire(struct xfrm_state
*x
)
1349 if (!x
->curlft
.use_time
)
1350 x
->curlft
.use_time
= get_seconds();
1352 if (x
->km
.state
!= XFRM_STATE_VALID
)
1355 if (x
->curlft
.bytes
>= x
->lft
.hard_byte_limit
||
1356 x
->curlft
.packets
>= x
->lft
.hard_packet_limit
) {
1357 x
->km
.state
= XFRM_STATE_EXPIRED
;
1358 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(0,0), HRTIMER_MODE_REL
);
1363 (x
->curlft
.bytes
>= x
->lft
.soft_byte_limit
||
1364 x
->curlft
.packets
>= x
->lft
.soft_packet_limit
)) {
1366 km_state_expired(x
, 0, 0);
1370 EXPORT_SYMBOL(xfrm_state_check_expire
);
1373 xfrm_state_lookup(struct net
*net
, u32 mark
, xfrm_address_t
*daddr
, __be32 spi
,
1374 u8 proto
, unsigned short family
)
1376 struct xfrm_state
*x
;
1378 spin_lock_bh(&xfrm_state_lock
);
1379 x
= __xfrm_state_lookup(net
, mark
, daddr
, spi
, proto
, family
);
1380 spin_unlock_bh(&xfrm_state_lock
);
1383 EXPORT_SYMBOL(xfrm_state_lookup
);
1386 xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1387 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(net
, mark
, daddr
, saddr
, proto
, family
);
1394 spin_unlock_bh(&xfrm_state_lock
);
1397 EXPORT_SYMBOL(xfrm_state_lookup_byaddr
);
1400 xfrm_find_acq(struct net
*net
, struct xfrm_mark
*mark
, 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(net
, mark
, 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(struct net
*net
, u32 mark
, u32 seq
)
1458 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
1459 struct hlist_node
*entry
;
1460 struct xfrm_state
*x
;
1462 hlist_for_each_entry(x
, entry
, net
->xfrm
.state_bydst
+i
, bydst
) {
1463 if (x
->km
.seq
== seq
&&
1464 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1465 x
->km
.state
== XFRM_STATE_ACQ
) {
1474 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
)
1476 struct xfrm_state
*x
;
1478 spin_lock_bh(&xfrm_state_lock
);
1479 x
= __xfrm_find_acq_byseq(net
, mark
, seq
);
1480 spin_unlock_bh(&xfrm_state_lock
);
1483 EXPORT_SYMBOL(xfrm_find_acq_byseq
);
1485 u32
xfrm_get_acqseq(void)
1488 static atomic_t acqseq
;
1491 res
= atomic_inc_return(&acqseq
);
1496 EXPORT_SYMBOL(xfrm_get_acqseq
);
1498 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 low
, u32 high
)
1500 struct net
*net
= xs_net(x
);
1502 struct xfrm_state
*x0
;
1504 __be32 minspi
= htonl(low
);
1505 __be32 maxspi
= htonl(high
);
1506 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1508 spin_lock_bh(&x
->lock
);
1509 if (x
->km
.state
== XFRM_STATE_DEAD
)
1518 if (minspi
== maxspi
) {
1519 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, minspi
, x
->id
.proto
, x
->props
.family
);
1527 for (h
=0; h
<high
-low
+1; h
++) {
1528 spi
= low
+ net_random()%(high
-low
+1);
1529 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, htonl(spi
), x
->id
.proto
, x
->props
.family
);
1531 x
->id
.spi
= htonl(spi
);
1538 spin_lock_bh(&xfrm_state_lock
);
1539 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, x
->props
.family
);
1540 hlist_add_head(&x
->byspi
, net
->xfrm
.state_byspi
+h
);
1541 spin_unlock_bh(&xfrm_state_lock
);
1547 spin_unlock_bh(&x
->lock
);
1551 EXPORT_SYMBOL(xfrm_alloc_spi
);
1553 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1554 int (*func
)(struct xfrm_state
*, int, void*),
1557 struct xfrm_state
*state
;
1558 struct xfrm_state_walk
*x
;
1561 if (walk
->seq
!= 0 && list_empty(&walk
->all
))
1564 spin_lock_bh(&xfrm_state_lock
);
1565 if (list_empty(&walk
->all
))
1566 x
= list_first_entry(&net
->xfrm
.state_all
, struct xfrm_state_walk
, all
);
1568 x
= list_entry(&walk
->all
, struct xfrm_state_walk
, all
);
1569 list_for_each_entry_from(x
, &net
->xfrm
.state_all
, all
) {
1570 if (x
->state
== XFRM_STATE_DEAD
)
1572 state
= container_of(x
, struct xfrm_state
, km
);
1573 if (!xfrm_id_proto_match(state
->id
.proto
, walk
->proto
))
1575 err
= func(state
, walk
->seq
, data
);
1577 list_move_tail(&walk
->all
, &x
->all
);
1582 if (walk
->seq
== 0) {
1586 list_del_init(&walk
->all
);
1588 spin_unlock_bh(&xfrm_state_lock
);
1591 EXPORT_SYMBOL(xfrm_state_walk
);
1593 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
)
1595 INIT_LIST_HEAD(&walk
->all
);
1596 walk
->proto
= proto
;
1597 walk
->state
= XFRM_STATE_DEAD
;
1600 EXPORT_SYMBOL(xfrm_state_walk_init
);
1602 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
)
1604 if (list_empty(&walk
->all
))
1607 spin_lock_bh(&xfrm_state_lock
);
1608 list_del(&walk
->all
);
1609 spin_unlock_bh(&xfrm_state_lock
);
1611 EXPORT_SYMBOL(xfrm_state_walk_done
);
1614 void xfrm_replay_notify(struct xfrm_state
*x
, int event
)
1617 /* we send notify messages in case
1618 * 1. we updated on of the sequence numbers, and the seqno difference
1619 * is at least x->replay_maxdiff, in this case we also update the
1620 * timeout of our timer function
1621 * 2. if x->replay_maxage has elapsed since last update,
1622 * and there were changes
1624 * The state structure must be locked!
1628 case XFRM_REPLAY_UPDATE
:
1629 if (x
->replay_maxdiff
&&
1630 (x
->replay
.seq
- x
->preplay
.seq
< x
->replay_maxdiff
) &&
1631 (x
->replay
.oseq
- x
->preplay
.oseq
< x
->replay_maxdiff
)) {
1632 if (x
->xflags
& XFRM_TIME_DEFER
)
1633 event
= XFRM_REPLAY_TIMEOUT
;
1640 case XFRM_REPLAY_TIMEOUT
:
1641 if ((x
->replay
.seq
== x
->preplay
.seq
) &&
1642 (x
->replay
.bitmap
== x
->preplay
.bitmap
) &&
1643 (x
->replay
.oseq
== x
->preplay
.oseq
)) {
1644 x
->xflags
|= XFRM_TIME_DEFER
;
1651 memcpy(&x
->preplay
, &x
->replay
, sizeof(struct xfrm_replay_state
));
1652 c
.event
= XFRM_MSG_NEWAE
;
1653 c
.data
.aevent
= event
;
1654 km_state_notify(x
, &c
);
1656 if (x
->replay_maxage
&&
1657 !mod_timer(&x
->rtimer
, jiffies
+ x
->replay_maxage
))
1658 x
->xflags
&= ~XFRM_TIME_DEFER
;
1661 static void xfrm_replay_timer_handler(unsigned long data
)
1663 struct xfrm_state
*x
= (struct xfrm_state
*)data
;
1665 spin_lock(&x
->lock
);
1667 if (x
->km
.state
== XFRM_STATE_VALID
) {
1668 if (xfrm_aevent_is_on(xs_net(x
)))
1669 xfrm_replay_notify(x
, XFRM_REPLAY_TIMEOUT
);
1671 x
->xflags
|= XFRM_TIME_DEFER
;
1674 spin_unlock(&x
->lock
);
1677 int xfrm_replay_check(struct xfrm_state
*x
,
1678 struct sk_buff
*skb
, __be32 net_seq
)
1681 u32 seq
= ntohl(net_seq
);
1683 if (unlikely(seq
== 0))
1686 if (likely(seq
> x
->replay
.seq
))
1689 diff
= x
->replay
.seq
- seq
;
1690 if (diff
>= min_t(unsigned int, x
->props
.replay_window
,
1691 sizeof(x
->replay
.bitmap
) * 8)) {
1692 x
->stats
.replay_window
++;
1696 if (x
->replay
.bitmap
& (1U << diff
)) {
1703 xfrm_audit_state_replay(x
, skb
, net_seq
);
1707 void xfrm_replay_advance(struct xfrm_state
*x
, __be32 net_seq
)
1710 u32 seq
= ntohl(net_seq
);
1712 if (seq
> x
->replay
.seq
) {
1713 diff
= seq
- x
->replay
.seq
;
1714 if (diff
< x
->props
.replay_window
)
1715 x
->replay
.bitmap
= ((x
->replay
.bitmap
) << diff
) | 1;
1717 x
->replay
.bitmap
= 1;
1718 x
->replay
.seq
= seq
;
1720 diff
= x
->replay
.seq
- seq
;
1721 x
->replay
.bitmap
|= (1U << diff
);
1724 if (xfrm_aevent_is_on(xs_net(x
)))
1725 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1728 static LIST_HEAD(xfrm_km_list
);
1729 static DEFINE_RWLOCK(xfrm_km_lock
);
1731 void km_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
1733 struct xfrm_mgr
*km
;
1735 read_lock(&xfrm_km_lock
);
1736 list_for_each_entry(km
, &xfrm_km_list
, list
)
1737 if (km
->notify_policy
)
1738 km
->notify_policy(xp
, dir
, c
);
1739 read_unlock(&xfrm_km_lock
);
1742 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
1744 struct xfrm_mgr
*km
;
1745 read_lock(&xfrm_km_lock
);
1746 list_for_each_entry(km
, &xfrm_km_list
, list
)
1749 read_unlock(&xfrm_km_lock
);
1752 EXPORT_SYMBOL(km_policy_notify
);
1753 EXPORT_SYMBOL(km_state_notify
);
1755 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
)
1757 struct net
*net
= xs_net(x
);
1762 c
.event
= XFRM_MSG_EXPIRE
;
1763 km_state_notify(x
, &c
);
1766 wake_up(&net
->xfrm
.km_waitq
);
1769 EXPORT_SYMBOL(km_state_expired
);
1771 * We send to all registered managers regardless of failure
1772 * We are happy with one success
1774 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
)
1776 int err
= -EINVAL
, acqret
;
1777 struct xfrm_mgr
*km
;
1779 read_lock(&xfrm_km_lock
);
1780 list_for_each_entry(km
, &xfrm_km_list
, list
) {
1781 acqret
= km
->acquire(x
, t
, pol
, XFRM_POLICY_OUT
);
1785 read_unlock(&xfrm_km_lock
);
1788 EXPORT_SYMBOL(km_query
);
1790 int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
)
1793 struct xfrm_mgr
*km
;
1795 read_lock(&xfrm_km_lock
);
1796 list_for_each_entry(km
, &xfrm_km_list
, list
) {
1797 if (km
->new_mapping
)
1798 err
= km
->new_mapping(x
, ipaddr
, sport
);
1802 read_unlock(&xfrm_km_lock
);
1805 EXPORT_SYMBOL(km_new_mapping
);
1807 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
)
1809 struct net
*net
= xp_net(pol
);
1814 c
.event
= XFRM_MSG_POLEXPIRE
;
1815 km_policy_notify(pol
, dir
, &c
);
1818 wake_up(&net
->xfrm
.km_waitq
);
1820 EXPORT_SYMBOL(km_policy_expired
);
1822 #ifdef CONFIG_XFRM_MIGRATE
1823 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1824 const struct xfrm_migrate
*m
, int num_migrate
,
1825 const struct xfrm_kmaddress
*k
)
1829 struct xfrm_mgr
*km
;
1831 read_lock(&xfrm_km_lock
);
1832 list_for_each_entry(km
, &xfrm_km_list
, list
) {
1834 ret
= km
->migrate(sel
, dir
, type
, m
, num_migrate
, k
);
1839 read_unlock(&xfrm_km_lock
);
1842 EXPORT_SYMBOL(km_migrate
);
1845 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
1849 struct xfrm_mgr
*km
;
1851 read_lock(&xfrm_km_lock
);
1852 list_for_each_entry(km
, &xfrm_km_list
, list
) {
1854 ret
= km
->report(net
, proto
, sel
, addr
);
1859 read_unlock(&xfrm_km_lock
);
1862 EXPORT_SYMBOL(km_report
);
1864 int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1868 struct xfrm_mgr
*km
;
1869 struct xfrm_policy
*pol
= NULL
;
1871 if (optlen
<= 0 || optlen
> PAGE_SIZE
)
1874 data
= kmalloc(optlen
, GFP_KERNEL
);
1879 if (copy_from_user(data
, optval
, optlen
))
1883 read_lock(&xfrm_km_lock
);
1884 list_for_each_entry(km
, &xfrm_km_list
, list
) {
1885 pol
= km
->compile_policy(sk
, optname
, data
,
1890 read_unlock(&xfrm_km_lock
);
1893 xfrm_sk_policy_insert(sk
, err
, pol
);
1902 EXPORT_SYMBOL(xfrm_user_policy
);
1904 int xfrm_register_km(struct xfrm_mgr
*km
)
1906 write_lock_bh(&xfrm_km_lock
);
1907 list_add_tail(&km
->list
, &xfrm_km_list
);
1908 write_unlock_bh(&xfrm_km_lock
);
1911 EXPORT_SYMBOL(xfrm_register_km
);
1913 int xfrm_unregister_km(struct xfrm_mgr
*km
)
1915 write_lock_bh(&xfrm_km_lock
);
1916 list_del(&km
->list
);
1917 write_unlock_bh(&xfrm_km_lock
);
1920 EXPORT_SYMBOL(xfrm_unregister_km
);
1922 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
)
1925 if (unlikely(afinfo
== NULL
))
1927 if (unlikely(afinfo
->family
>= NPROTO
))
1928 return -EAFNOSUPPORT
;
1929 write_lock_bh(&xfrm_state_afinfo_lock
);
1930 if (unlikely(xfrm_state_afinfo
[afinfo
->family
] != NULL
))
1933 xfrm_state_afinfo
[afinfo
->family
] = afinfo
;
1934 write_unlock_bh(&xfrm_state_afinfo_lock
);
1937 EXPORT_SYMBOL(xfrm_state_register_afinfo
);
1939 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
)
1942 if (unlikely(afinfo
== NULL
))
1944 if (unlikely(afinfo
->family
>= NPROTO
))
1945 return -EAFNOSUPPORT
;
1946 write_lock_bh(&xfrm_state_afinfo_lock
);
1947 if (likely(xfrm_state_afinfo
[afinfo
->family
] != NULL
)) {
1948 if (unlikely(xfrm_state_afinfo
[afinfo
->family
] != afinfo
))
1951 xfrm_state_afinfo
[afinfo
->family
] = NULL
;
1953 write_unlock_bh(&xfrm_state_afinfo_lock
);
1956 EXPORT_SYMBOL(xfrm_state_unregister_afinfo
);
1958 static struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
)
1960 struct xfrm_state_afinfo
*afinfo
;
1961 if (unlikely(family
>= NPROTO
))
1963 read_lock(&xfrm_state_afinfo_lock
);
1964 afinfo
= xfrm_state_afinfo
[family
];
1965 if (unlikely(!afinfo
))
1966 read_unlock(&xfrm_state_afinfo_lock
);
1970 static void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
)
1971 __releases(xfrm_state_afinfo_lock
)
1973 read_unlock(&xfrm_state_afinfo_lock
);
1976 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1977 void xfrm_state_delete_tunnel(struct xfrm_state
*x
)
1980 struct xfrm_state
*t
= x
->tunnel
;
1982 if (atomic_read(&t
->tunnel_users
) == 2)
1983 xfrm_state_delete(t
);
1984 atomic_dec(&t
->tunnel_users
);
1989 EXPORT_SYMBOL(xfrm_state_delete_tunnel
);
1991 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
)
1995 spin_lock_bh(&x
->lock
);
1996 if (x
->km
.state
== XFRM_STATE_VALID
&&
1997 x
->type
&& x
->type
->get_mtu
)
1998 res
= x
->type
->get_mtu(x
, mtu
);
2000 res
= mtu
- x
->props
.header_len
;
2001 spin_unlock_bh(&x
->lock
);
2005 int xfrm_init_state(struct xfrm_state
*x
)
2007 struct xfrm_state_afinfo
*afinfo
;
2008 struct xfrm_mode
*inner_mode
;
2009 int family
= x
->props
.family
;
2012 err
= -EAFNOSUPPORT
;
2013 afinfo
= xfrm_state_get_afinfo(family
);
2018 if (afinfo
->init_flags
)
2019 err
= afinfo
->init_flags(x
);
2021 xfrm_state_put_afinfo(afinfo
);
2026 err
= -EPROTONOSUPPORT
;
2028 if (x
->sel
.family
!= AF_UNSPEC
) {
2029 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->sel
.family
);
2030 if (inner_mode
== NULL
)
2033 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
) &&
2034 family
!= x
->sel
.family
) {
2035 xfrm_put_mode(inner_mode
);
2039 x
->inner_mode
= inner_mode
;
2041 struct xfrm_mode
*inner_mode_iaf
;
2042 int iafamily
= AF_INET
;
2044 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->props
.family
);
2045 if (inner_mode
== NULL
)
2048 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
)) {
2049 xfrm_put_mode(inner_mode
);
2052 x
->inner_mode
= inner_mode
;
2054 if (x
->props
.family
== AF_INET
)
2055 iafamily
= AF_INET6
;
2057 inner_mode_iaf
= xfrm_get_mode(x
->props
.mode
, iafamily
);
2058 if (inner_mode_iaf
) {
2059 if (inner_mode_iaf
->flags
& XFRM_MODE_FLAG_TUNNEL
)
2060 x
->inner_mode_iaf
= inner_mode_iaf
;
2062 xfrm_put_mode(inner_mode_iaf
);
2066 x
->type
= xfrm_get_type(x
->id
.proto
, family
);
2067 if (x
->type
== NULL
)
2070 err
= x
->type
->init_state(x
);
2074 x
->outer_mode
= xfrm_get_mode(x
->props
.mode
, family
);
2075 if (x
->outer_mode
== NULL
)
2078 x
->km
.state
= XFRM_STATE_VALID
;
2084 EXPORT_SYMBOL(xfrm_init_state
);
2086 int __net_init
xfrm_state_init(struct net
*net
)
2090 INIT_LIST_HEAD(&net
->xfrm
.state_all
);
2092 sz
= sizeof(struct hlist_head
) * 8;
2094 net
->xfrm
.state_bydst
= xfrm_hash_alloc(sz
);
2095 if (!net
->xfrm
.state_bydst
)
2097 net
->xfrm
.state_bysrc
= xfrm_hash_alloc(sz
);
2098 if (!net
->xfrm
.state_bysrc
)
2100 net
->xfrm
.state_byspi
= xfrm_hash_alloc(sz
);
2101 if (!net
->xfrm
.state_byspi
)
2103 net
->xfrm
.state_hmask
= ((sz
/ sizeof(struct hlist_head
)) - 1);
2105 net
->xfrm
.state_num
= 0;
2106 INIT_WORK(&net
->xfrm
.state_hash_work
, xfrm_hash_resize
);
2107 INIT_HLIST_HEAD(&net
->xfrm
.state_gc_list
);
2108 INIT_WORK(&net
->xfrm
.state_gc_work
, xfrm_state_gc_task
);
2109 init_waitqueue_head(&net
->xfrm
.km_waitq
);
2113 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2115 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2120 void xfrm_state_fini(struct net
*net
)
2122 struct xfrm_audit audit_info
;
2125 flush_work(&net
->xfrm
.state_hash_work
);
2126 audit_info
.loginuid
= -1;
2127 audit_info
.sessionid
= -1;
2128 audit_info
.secid
= 0;
2129 xfrm_state_flush(net
, IPSEC_PROTO_ANY
, &audit_info
);
2130 flush_work(&net
->xfrm
.state_gc_work
);
2132 WARN_ON(!list_empty(&net
->xfrm
.state_all
));
2134 sz
= (net
->xfrm
.state_hmask
+ 1) * sizeof(struct hlist_head
);
2135 WARN_ON(!hlist_empty(net
->xfrm
.state_byspi
));
2136 xfrm_hash_free(net
->xfrm
.state_byspi
, sz
);
2137 WARN_ON(!hlist_empty(net
->xfrm
.state_bysrc
));
2138 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2139 WARN_ON(!hlist_empty(net
->xfrm
.state_bydst
));
2140 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2143 #ifdef CONFIG_AUDITSYSCALL
2144 static void xfrm_audit_helper_sainfo(struct xfrm_state
*x
,
2145 struct audit_buffer
*audit_buf
)
2147 struct xfrm_sec_ctx
*ctx
= x
->security
;
2148 u32 spi
= ntohl(x
->id
.spi
);
2151 audit_log_format(audit_buf
, " sec_alg=%u sec_doi=%u sec_obj=%s",
2152 ctx
->ctx_alg
, ctx
->ctx_doi
, ctx
->ctx_str
);
2154 switch(x
->props
.family
) {
2156 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2157 &x
->props
.saddr
.a4
, &x
->id
.daddr
.a4
);
2160 audit_log_format(audit_buf
, " src=%pI6 dst=%pI6",
2161 x
->props
.saddr
.a6
, x
->id
.daddr
.a6
);
2165 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2168 static void xfrm_audit_helper_pktinfo(struct sk_buff
*skb
, u16 family
,
2169 struct audit_buffer
*audit_buf
)
2172 struct ipv6hdr
*iph6
;
2177 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2178 &iph4
->saddr
, &iph4
->daddr
);
2181 iph6
= ipv6_hdr(skb
);
2182 audit_log_format(audit_buf
,
2183 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2184 &iph6
->saddr
,&iph6
->daddr
,
2185 iph6
->flow_lbl
[0] & 0x0f,
2192 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
2193 uid_t auid
, u32 sessionid
, u32 secid
)
2195 struct audit_buffer
*audit_buf
;
2197 audit_buf
= xfrm_audit_start("SAD-add");
2198 if (audit_buf
== NULL
)
2200 xfrm_audit_helper_usrinfo(auid
, sessionid
, secid
, audit_buf
);
2201 xfrm_audit_helper_sainfo(x
, audit_buf
);
2202 audit_log_format(audit_buf
, " res=%u", result
);
2203 audit_log_end(audit_buf
);
2205 EXPORT_SYMBOL_GPL(xfrm_audit_state_add
);
2207 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
2208 uid_t auid
, u32 sessionid
, u32 secid
)
2210 struct audit_buffer
*audit_buf
;
2212 audit_buf
= xfrm_audit_start("SAD-delete");
2213 if (audit_buf
== NULL
)
2215 xfrm_audit_helper_usrinfo(auid
, sessionid
, secid
, audit_buf
);
2216 xfrm_audit_helper_sainfo(x
, audit_buf
);
2217 audit_log_format(audit_buf
, " res=%u", result
);
2218 audit_log_end(audit_buf
);
2220 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete
);
2222 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
2223 struct sk_buff
*skb
)
2225 struct audit_buffer
*audit_buf
;
2228 audit_buf
= xfrm_audit_start("SA-replay-overflow");
2229 if (audit_buf
== NULL
)
2231 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2232 /* don't record the sequence number because it's inherent in this kind
2233 * of audit message */
2234 spi
= ntohl(x
->id
.spi
);
2235 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2236 audit_log_end(audit_buf
);
2238 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow
);
2240 static void xfrm_audit_state_replay(struct xfrm_state
*x
,
2241 struct sk_buff
*skb
, __be32 net_seq
)
2243 struct audit_buffer
*audit_buf
;
2246 audit_buf
= xfrm_audit_start("SA-replayed-pkt");
2247 if (audit_buf
== NULL
)
2249 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2250 spi
= ntohl(x
->id
.spi
);
2251 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2252 spi
, spi
, ntohl(net_seq
));
2253 audit_log_end(audit_buf
);
2256 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
)
2258 struct audit_buffer
*audit_buf
;
2260 audit_buf
= xfrm_audit_start("SA-notfound");
2261 if (audit_buf
== NULL
)
2263 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2264 audit_log_end(audit_buf
);
2266 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple
);
2268 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
2269 __be32 net_spi
, __be32 net_seq
)
2271 struct audit_buffer
*audit_buf
;
2274 audit_buf
= xfrm_audit_start("SA-notfound");
2275 if (audit_buf
== NULL
)
2277 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2278 spi
= ntohl(net_spi
);
2279 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2280 spi
, spi
, ntohl(net_seq
));
2281 audit_log_end(audit_buf
);
2283 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound
);
2285 void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
2286 struct sk_buff
*skb
, u8 proto
)
2288 struct audit_buffer
*audit_buf
;
2292 audit_buf
= xfrm_audit_start("SA-icv-failure");
2293 if (audit_buf
== NULL
)
2295 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2296 if (xfrm_parse_spi(skb
, proto
, &net_spi
, &net_seq
) == 0) {
2297 u32 spi
= ntohl(net_spi
);
2298 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2299 spi
, spi
, ntohl(net_seq
));
2301 audit_log_end(audit_buf
);
2303 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail
);
2304 #endif /* CONFIG_AUDITSYSCALL */