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 #define xfrm_state_deref_prot(table, net) \
32 rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
34 static void xfrm_state_gc_task(struct work_struct
*work
);
36 /* Each xfrm_state may be linked to two tables:
38 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
39 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
40 destination/tunnel endpoint. (output)
43 static unsigned int xfrm_state_hashmax __read_mostly
= 1 * 1024 * 1024;
44 static __read_mostly seqcount_t xfrm_state_hash_generation
= SEQCNT_ZERO(xfrm_state_hash_generation
);
46 static DECLARE_WORK(xfrm_state_gc_work
, xfrm_state_gc_task
);
47 static HLIST_HEAD(xfrm_state_gc_list
);
49 static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu
*x
)
51 return atomic_inc_not_zero(&x
->refcnt
);
54 static inline unsigned int xfrm_dst_hash(struct net
*net
,
55 const xfrm_address_t
*daddr
,
56 const xfrm_address_t
*saddr
,
58 unsigned short family
)
60 return __xfrm_dst_hash(daddr
, saddr
, reqid
, family
, net
->xfrm
.state_hmask
);
63 static inline unsigned int xfrm_src_hash(struct net
*net
,
64 const xfrm_address_t
*daddr
,
65 const xfrm_address_t
*saddr
,
66 unsigned short family
)
68 return __xfrm_src_hash(daddr
, saddr
, family
, net
->xfrm
.state_hmask
);
71 static inline unsigned int
72 xfrm_spi_hash(struct net
*net
, const xfrm_address_t
*daddr
,
73 __be32 spi
, u8 proto
, unsigned short family
)
75 return __xfrm_spi_hash(daddr
, spi
, proto
, family
, net
->xfrm
.state_hmask
);
78 static void xfrm_hash_transfer(struct hlist_head
*list
,
79 struct hlist_head
*ndsttable
,
80 struct hlist_head
*nsrctable
,
81 struct hlist_head
*nspitable
,
82 unsigned int nhashmask
)
84 struct hlist_node
*tmp
;
87 hlist_for_each_entry_safe(x
, tmp
, list
, bydst
) {
90 h
= __xfrm_dst_hash(&x
->id
.daddr
, &x
->props
.saddr
,
91 x
->props
.reqid
, x
->props
.family
,
93 hlist_add_head_rcu(&x
->bydst
, ndsttable
+ h
);
95 h
= __xfrm_src_hash(&x
->id
.daddr
, &x
->props
.saddr
,
98 hlist_add_head_rcu(&x
->bysrc
, nsrctable
+ h
);
101 h
= __xfrm_spi_hash(&x
->id
.daddr
, x
->id
.spi
,
102 x
->id
.proto
, x
->props
.family
,
104 hlist_add_head_rcu(&x
->byspi
, nspitable
+ h
);
109 static unsigned long xfrm_hash_new_size(unsigned int state_hmask
)
111 return ((state_hmask
+ 1) << 1) * sizeof(struct hlist_head
);
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 nsize
= xfrm_hash_new_size(net
->xfrm
.state_hmask
);
123 ndst
= xfrm_hash_alloc(nsize
);
126 nsrc
= xfrm_hash_alloc(nsize
);
128 xfrm_hash_free(ndst
, nsize
);
131 nspi
= xfrm_hash_alloc(nsize
);
133 xfrm_hash_free(ndst
, nsize
);
134 xfrm_hash_free(nsrc
, nsize
);
138 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
139 write_seqcount_begin(&xfrm_state_hash_generation
);
141 nhashmask
= (nsize
/ sizeof(struct hlist_head
)) - 1U;
142 odst
= xfrm_state_deref_prot(net
->xfrm
.state_bydst
, net
);
143 for (i
= net
->xfrm
.state_hmask
; i
>= 0; i
--)
144 xfrm_hash_transfer(odst
+ i
, ndst
, nsrc
, nspi
, nhashmask
);
146 osrc
= xfrm_state_deref_prot(net
->xfrm
.state_bysrc
, net
);
147 ospi
= xfrm_state_deref_prot(net
->xfrm
.state_byspi
, net
);
148 ohashmask
= net
->xfrm
.state_hmask
;
150 rcu_assign_pointer(net
->xfrm
.state_bydst
, ndst
);
151 rcu_assign_pointer(net
->xfrm
.state_bysrc
, nsrc
);
152 rcu_assign_pointer(net
->xfrm
.state_byspi
, nspi
);
153 net
->xfrm
.state_hmask
= nhashmask
;
155 write_seqcount_end(&xfrm_state_hash_generation
);
156 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
158 osize
= (ohashmask
+ 1) * sizeof(struct hlist_head
);
162 xfrm_hash_free(odst
, osize
);
163 xfrm_hash_free(osrc
, osize
);
164 xfrm_hash_free(ospi
, osize
);
167 static DEFINE_SPINLOCK(xfrm_state_afinfo_lock
);
168 static struct xfrm_state_afinfo __rcu
*xfrm_state_afinfo
[NPROTO
];
170 static DEFINE_SPINLOCK(xfrm_state_gc_lock
);
172 int __xfrm_state_delete(struct xfrm_state
*x
);
174 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
175 bool km_is_alive(const struct km_event
*c
);
176 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
);
178 static DEFINE_SPINLOCK(xfrm_type_lock
);
179 int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
)
181 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
182 const struct xfrm_type
**typemap
;
185 if (unlikely(afinfo
== NULL
))
186 return -EAFNOSUPPORT
;
187 typemap
= afinfo
->type_map
;
188 spin_lock_bh(&xfrm_type_lock
);
190 if (likely(typemap
[type
->proto
] == NULL
))
191 typemap
[type
->proto
] = type
;
194 spin_unlock_bh(&xfrm_type_lock
);
195 xfrm_state_put_afinfo(afinfo
);
198 EXPORT_SYMBOL(xfrm_register_type
);
200 int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
)
202 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
203 const struct xfrm_type
**typemap
;
206 if (unlikely(afinfo
== NULL
))
207 return -EAFNOSUPPORT
;
208 typemap
= afinfo
->type_map
;
209 spin_lock_bh(&xfrm_type_lock
);
211 if (unlikely(typemap
[type
->proto
] != type
))
214 typemap
[type
->proto
] = NULL
;
215 spin_unlock_bh(&xfrm_type_lock
);
216 xfrm_state_put_afinfo(afinfo
);
219 EXPORT_SYMBOL(xfrm_unregister_type
);
221 static const struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
)
223 struct xfrm_state_afinfo
*afinfo
;
224 const struct xfrm_type
**typemap
;
225 const struct xfrm_type
*type
;
226 int modload_attempted
= 0;
229 afinfo
= xfrm_state_get_afinfo(family
);
230 if (unlikely(afinfo
== NULL
))
232 typemap
= afinfo
->type_map
;
234 type
= typemap
[proto
];
235 if (unlikely(type
&& !try_module_get(type
->owner
)))
237 if (!type
&& !modload_attempted
) {
238 xfrm_state_put_afinfo(afinfo
);
239 request_module("xfrm-type-%d-%d", family
, proto
);
240 modload_attempted
= 1;
244 xfrm_state_put_afinfo(afinfo
);
248 static void xfrm_put_type(const struct xfrm_type
*type
)
250 module_put(type
->owner
);
253 static DEFINE_SPINLOCK(xfrm_mode_lock
);
254 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
)
256 struct xfrm_state_afinfo
*afinfo
;
257 struct xfrm_mode
**modemap
;
260 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
263 afinfo
= xfrm_state_get_afinfo(family
);
264 if (unlikely(afinfo
== NULL
))
265 return -EAFNOSUPPORT
;
268 modemap
= afinfo
->mode_map
;
269 spin_lock_bh(&xfrm_mode_lock
);
270 if (modemap
[mode
->encap
])
274 if (!try_module_get(afinfo
->owner
))
277 mode
->afinfo
= afinfo
;
278 modemap
[mode
->encap
] = mode
;
282 spin_unlock_bh(&xfrm_mode_lock
);
283 xfrm_state_put_afinfo(afinfo
);
286 EXPORT_SYMBOL(xfrm_register_mode
);
288 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
)
290 struct xfrm_state_afinfo
*afinfo
;
291 struct xfrm_mode
**modemap
;
294 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
297 afinfo
= xfrm_state_get_afinfo(family
);
298 if (unlikely(afinfo
== NULL
))
299 return -EAFNOSUPPORT
;
302 modemap
= afinfo
->mode_map
;
303 spin_lock_bh(&xfrm_mode_lock
);
304 if (likely(modemap
[mode
->encap
] == mode
)) {
305 modemap
[mode
->encap
] = NULL
;
306 module_put(mode
->afinfo
->owner
);
310 spin_unlock_bh(&xfrm_mode_lock
);
311 xfrm_state_put_afinfo(afinfo
);
314 EXPORT_SYMBOL(xfrm_unregister_mode
);
316 static struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
)
318 struct xfrm_state_afinfo
*afinfo
;
319 struct xfrm_mode
*mode
;
320 int modload_attempted
= 0;
322 if (unlikely(encap
>= XFRM_MODE_MAX
))
326 afinfo
= xfrm_state_get_afinfo(family
);
327 if (unlikely(afinfo
== NULL
))
330 mode
= afinfo
->mode_map
[encap
];
331 if (unlikely(mode
&& !try_module_get(mode
->owner
)))
333 if (!mode
&& !modload_attempted
) {
334 xfrm_state_put_afinfo(afinfo
);
335 request_module("xfrm-mode-%d-%d", family
, encap
);
336 modload_attempted
= 1;
340 xfrm_state_put_afinfo(afinfo
);
344 static void xfrm_put_mode(struct xfrm_mode
*mode
)
346 module_put(mode
->owner
);
349 static void xfrm_state_gc_destroy(struct xfrm_state
*x
)
351 tasklet_hrtimer_cancel(&x
->mtimer
);
352 del_timer_sync(&x
->rtimer
);
358 kfree(x
->replay_esn
);
359 kfree(x
->preplay_esn
);
361 xfrm_put_mode(x
->inner_mode
);
362 if (x
->inner_mode_iaf
)
363 xfrm_put_mode(x
->inner_mode_iaf
);
365 xfrm_put_mode(x
->outer_mode
);
367 x
->type
->destructor(x
);
368 xfrm_put_type(x
->type
);
370 security_xfrm_state_free(x
);
374 static void xfrm_state_gc_task(struct work_struct
*work
)
376 struct xfrm_state
*x
;
377 struct hlist_node
*tmp
;
378 struct hlist_head gc_list
;
380 spin_lock_bh(&xfrm_state_gc_lock
);
381 hlist_move_list(&xfrm_state_gc_list
, &gc_list
);
382 spin_unlock_bh(&xfrm_state_gc_lock
);
386 hlist_for_each_entry_safe(x
, tmp
, &gc_list
, gclist
)
387 xfrm_state_gc_destroy(x
);
390 static inline unsigned long make_jiffies(long secs
)
392 if (secs
>= (MAX_SCHEDULE_TIMEOUT
-1)/HZ
)
393 return MAX_SCHEDULE_TIMEOUT
-1;
398 static enum hrtimer_restart
xfrm_timer_handler(struct hrtimer
*me
)
400 struct tasklet_hrtimer
*thr
= container_of(me
, struct tasklet_hrtimer
, timer
);
401 struct xfrm_state
*x
= container_of(thr
, struct xfrm_state
, mtimer
);
402 unsigned long now
= get_seconds();
403 long next
= LONG_MAX
;
408 if (x
->km
.state
== XFRM_STATE_DEAD
)
410 if (x
->km
.state
== XFRM_STATE_EXPIRED
)
412 if (x
->lft
.hard_add_expires_seconds
) {
413 long tmo
= x
->lft
.hard_add_expires_seconds
+
414 x
->curlft
.add_time
- now
;
416 if (x
->xflags
& XFRM_SOFT_EXPIRE
) {
417 /* enter hard expire without soft expire first?!
418 * setting a new date could trigger this.
419 * workarbound: fix x->curflt.add_time by below:
421 x
->curlft
.add_time
= now
- x
->saved_tmo
- 1;
422 tmo
= x
->lft
.hard_add_expires_seconds
- x
->saved_tmo
;
429 if (x
->lft
.hard_use_expires_seconds
) {
430 long tmo
= x
->lft
.hard_use_expires_seconds
+
431 (x
->curlft
.use_time
? : now
) - now
;
439 if (x
->lft
.soft_add_expires_seconds
) {
440 long tmo
= x
->lft
.soft_add_expires_seconds
+
441 x
->curlft
.add_time
- now
;
444 x
->xflags
&= ~XFRM_SOFT_EXPIRE
;
445 } else if (tmo
< next
) {
447 x
->xflags
|= XFRM_SOFT_EXPIRE
;
451 if (x
->lft
.soft_use_expires_seconds
) {
452 long tmo
= x
->lft
.soft_use_expires_seconds
+
453 (x
->curlft
.use_time
? : now
) - now
;
462 km_state_expired(x
, 0, 0);
464 if (next
!= LONG_MAX
) {
465 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(next
, 0), HRTIMER_MODE_REL
);
471 if (x
->km
.state
== XFRM_STATE_ACQ
&& x
->id
.spi
== 0)
472 x
->km
.state
= XFRM_STATE_EXPIRED
;
474 err
= __xfrm_state_delete(x
);
476 km_state_expired(x
, 1, 0);
478 xfrm_audit_state_delete(x
, err
? 0 : 1, true);
481 spin_unlock(&x
->lock
);
482 return HRTIMER_NORESTART
;
485 static void xfrm_replay_timer_handler(unsigned long data
);
487 struct xfrm_state
*xfrm_state_alloc(struct net
*net
)
489 struct xfrm_state
*x
;
491 x
= kzalloc(sizeof(struct xfrm_state
), GFP_ATOMIC
);
494 write_pnet(&x
->xs_net
, net
);
495 atomic_set(&x
->refcnt
, 1);
496 atomic_set(&x
->tunnel_users
, 0);
497 INIT_LIST_HEAD(&x
->km
.all
);
498 INIT_HLIST_NODE(&x
->bydst
);
499 INIT_HLIST_NODE(&x
->bysrc
);
500 INIT_HLIST_NODE(&x
->byspi
);
501 tasklet_hrtimer_init(&x
->mtimer
, xfrm_timer_handler
,
502 CLOCK_BOOTTIME
, 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 WARN_ON(x
->km
.state
!= XFRM_STATE_DEAD
);
524 spin_lock_bh(&xfrm_state_gc_lock
);
525 hlist_add_head(&x
->gclist
, &xfrm_state_gc_list
);
526 spin_unlock_bh(&xfrm_state_gc_lock
);
527 schedule_work(&xfrm_state_gc_work
);
529 EXPORT_SYMBOL(__xfrm_state_destroy
);
531 int __xfrm_state_delete(struct xfrm_state
*x
)
533 struct net
*net
= xs_net(x
);
536 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
537 x
->km
.state
= XFRM_STATE_DEAD
;
538 spin_lock(&net
->xfrm
.xfrm_state_lock
);
539 list_del(&x
->km
.all
);
540 hlist_del_rcu(&x
->bydst
);
541 hlist_del_rcu(&x
->bysrc
);
543 hlist_del_rcu(&x
->byspi
);
544 net
->xfrm
.state_num
--;
545 spin_unlock(&net
->xfrm
.xfrm_state_lock
);
547 /* All xfrm_state objects are created by xfrm_state_alloc.
548 * The xfrm_state_alloc call gives a reference, and that
549 * is what we are dropping here.
557 EXPORT_SYMBOL(__xfrm_state_delete
);
559 int xfrm_state_delete(struct xfrm_state
*x
)
563 spin_lock_bh(&x
->lock
);
564 err
= __xfrm_state_delete(x
);
565 spin_unlock_bh(&x
->lock
);
569 EXPORT_SYMBOL(xfrm_state_delete
);
571 #ifdef CONFIG_SECURITY_NETWORK_XFRM
573 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, bool task_valid
)
577 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
578 struct xfrm_state
*x
;
580 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
581 if (xfrm_id_proto_match(x
->id
.proto
, proto
) &&
582 (err
= security_xfrm_state_delete(x
)) != 0) {
583 xfrm_audit_state_delete(x
, 0, task_valid
);
593 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, bool task_valid
)
599 int xfrm_state_flush(struct net
*net
, u8 proto
, bool task_valid
)
601 int i
, err
= 0, cnt
= 0;
603 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
604 err
= xfrm_state_flush_secctx_check(net
, proto
, task_valid
);
609 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
610 struct xfrm_state
*x
;
612 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
613 if (!xfrm_state_kern(x
) &&
614 xfrm_id_proto_match(x
->id
.proto
, proto
)) {
616 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
618 err
= xfrm_state_delete(x
);
619 xfrm_audit_state_delete(x
, err
? 0 : 1,
625 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
634 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
637 EXPORT_SYMBOL(xfrm_state_flush
);
639 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
)
641 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
642 si
->sadcnt
= net
->xfrm
.state_num
;
643 si
->sadhcnt
= net
->xfrm
.state_hmask
;
644 si
->sadhmcnt
= xfrm_state_hashmax
;
645 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
647 EXPORT_SYMBOL(xfrm_sad_getinfo
);
650 xfrm_init_tempstate(struct xfrm_state
*x
, const struct flowi
*fl
,
651 const struct xfrm_tmpl
*tmpl
,
652 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
653 unsigned short family
)
655 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
658 afinfo
->init_tempsel(&x
->sel
, fl
);
660 if (family
!= tmpl
->encap_family
) {
661 xfrm_state_put_afinfo(afinfo
);
662 afinfo
= xfrm_state_get_afinfo(tmpl
->encap_family
);
666 afinfo
->init_temprop(x
, tmpl
, daddr
, saddr
);
667 xfrm_state_put_afinfo(afinfo
);
671 static struct xfrm_state
*__xfrm_state_lookup(struct net
*net
, u32 mark
,
672 const xfrm_address_t
*daddr
,
673 __be32 spi
, u8 proto
,
674 unsigned short family
)
676 unsigned int h
= xfrm_spi_hash(net
, daddr
, spi
, proto
, family
);
677 struct xfrm_state
*x
;
679 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_byspi
+ h
, byspi
) {
680 if (x
->props
.family
!= family
||
682 x
->id
.proto
!= proto
||
683 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
))
686 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
688 if (!xfrm_state_hold_rcu(x
))
696 static struct xfrm_state
*__xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
697 const xfrm_address_t
*daddr
,
698 const xfrm_address_t
*saddr
,
699 u8 proto
, unsigned short family
)
701 unsigned int h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
702 struct xfrm_state
*x
;
704 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bysrc
+ h
, bysrc
) {
705 if (x
->props
.family
!= family
||
706 x
->id
.proto
!= proto
||
707 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
) ||
708 !xfrm_addr_equal(&x
->props
.saddr
, saddr
, family
))
711 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
713 if (!xfrm_state_hold_rcu(x
))
721 static inline struct xfrm_state
*
722 __xfrm_state_locate(struct xfrm_state
*x
, int use_spi
, int family
)
724 struct net
*net
= xs_net(x
);
725 u32 mark
= x
->mark
.v
& x
->mark
.m
;
728 return __xfrm_state_lookup(net
, mark
, &x
->id
.daddr
,
729 x
->id
.spi
, x
->id
.proto
, family
);
731 return __xfrm_state_lookup_byaddr(net
, mark
,
734 x
->id
.proto
, family
);
737 static void xfrm_hash_grow_check(struct net
*net
, int have_hash_collision
)
739 if (have_hash_collision
&&
740 (net
->xfrm
.state_hmask
+ 1) < xfrm_state_hashmax
&&
741 net
->xfrm
.state_num
> net
->xfrm
.state_hmask
)
742 schedule_work(&net
->xfrm
.state_hash_work
);
745 static void xfrm_state_look_at(struct xfrm_policy
*pol
, struct xfrm_state
*x
,
746 const struct flowi
*fl
, unsigned short family
,
747 struct xfrm_state
**best
, int *acq_in_progress
,
751 * 1. There is a valid state with matching selector. Done.
752 * 2. Valid state with inappropriate selector. Skip.
754 * Entering area of "sysdeps".
756 * 3. If state is not valid, selector is temporary, it selects
757 * only session which triggered previous resolution. Key
758 * manager will do something to install a state with proper
761 if (x
->km
.state
== XFRM_STATE_VALID
) {
762 if ((x
->sel
.family
&&
763 !xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
)) ||
764 !security_xfrm_state_pol_flow_match(x
, pol
, fl
))
768 (*best
)->km
.dying
> x
->km
.dying
||
769 ((*best
)->km
.dying
== x
->km
.dying
&&
770 (*best
)->curlft
.add_time
< x
->curlft
.add_time
))
772 } else if (x
->km
.state
== XFRM_STATE_ACQ
) {
773 *acq_in_progress
= 1;
774 } else if (x
->km
.state
== XFRM_STATE_ERROR
||
775 x
->km
.state
== XFRM_STATE_EXPIRED
) {
776 if (xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
) &&
777 security_xfrm_state_pol_flow_match(x
, pol
, fl
))
783 xfrm_state_find(const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
784 const struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
785 struct xfrm_policy
*pol
, int *err
,
786 unsigned short family
)
788 static xfrm_address_t saddr_wildcard
= { };
789 struct net
*net
= xp_net(pol
);
790 unsigned int h
, h_wildcard
;
791 struct xfrm_state
*x
, *x0
, *to_put
;
792 int acquire_in_progress
= 0;
794 struct xfrm_state
*best
= NULL
;
795 u32 mark
= pol
->mark
.v
& pol
->mark
.m
;
796 unsigned short encap_family
= tmpl
->encap_family
;
797 unsigned int sequence
;
802 sequence
= read_seqcount_begin(&xfrm_state_hash_generation
);
805 h
= xfrm_dst_hash(net
, daddr
, saddr
, tmpl
->reqid
, encap_family
);
806 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bydst
+ h
, bydst
) {
807 if (x
->props
.family
== encap_family
&&
808 x
->props
.reqid
== tmpl
->reqid
&&
809 (mark
& x
->mark
.m
) == x
->mark
.v
&&
810 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
811 xfrm_state_addr_check(x
, daddr
, saddr
, encap_family
) &&
812 tmpl
->mode
== x
->props
.mode
&&
813 tmpl
->id
.proto
== x
->id
.proto
&&
814 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
815 xfrm_state_look_at(pol
, x
, fl
, encap_family
,
816 &best
, &acquire_in_progress
, &error
);
818 if (best
|| acquire_in_progress
)
821 h_wildcard
= xfrm_dst_hash(net
, daddr
, &saddr_wildcard
, tmpl
->reqid
, encap_family
);
822 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bydst
+ h_wildcard
, bydst
) {
823 if (x
->props
.family
== encap_family
&&
824 x
->props
.reqid
== tmpl
->reqid
&&
825 (mark
& x
->mark
.m
) == x
->mark
.v
&&
826 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
827 xfrm_addr_equal(&x
->id
.daddr
, daddr
, encap_family
) &&
828 tmpl
->mode
== x
->props
.mode
&&
829 tmpl
->id
.proto
== x
->id
.proto
&&
830 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
831 xfrm_state_look_at(pol
, x
, fl
, encap_family
,
832 &best
, &acquire_in_progress
, &error
);
837 if (!x
&& !error
&& !acquire_in_progress
) {
839 (x0
= __xfrm_state_lookup(net
, mark
, daddr
, tmpl
->id
.spi
,
840 tmpl
->id
.proto
, encap_family
)) != NULL
) {
847 /* If the KMs have no listeners (yet...), avoid allocating an SA
848 * for each and every packet - garbage collection might not
851 if (!km_is_alive(&c
)) {
856 x
= xfrm_state_alloc(net
);
861 /* Initialize temporary state matching only
862 * to current session. */
863 xfrm_init_tempstate(x
, fl
, tmpl
, daddr
, saddr
, family
);
864 memcpy(&x
->mark
, &pol
->mark
, sizeof(x
->mark
));
866 error
= security_xfrm_state_alloc_acquire(x
, pol
->security
, fl
->flowi_secid
);
868 x
->km
.state
= XFRM_STATE_DEAD
;
874 if (km_query(x
, tmpl
, pol
) == 0) {
875 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
876 x
->km
.state
= XFRM_STATE_ACQ
;
877 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
878 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
879 h
= xfrm_src_hash(net
, daddr
, saddr
, encap_family
);
880 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
882 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, encap_family
);
883 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
885 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
886 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
887 net
->xfrm
.state_num
++;
888 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
889 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
891 x
->km
.state
= XFRM_STATE_DEAD
;
899 if (!xfrm_state_hold_rcu(x
)) {
904 *err
= acquire_in_progress
? -EAGAIN
: error
;
908 xfrm_state_put(to_put
);
910 if (read_seqcount_retry(&xfrm_state_hash_generation
, sequence
)) {
922 xfrm_stateonly_find(struct net
*net
, u32 mark
,
923 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
924 unsigned short family
, u8 mode
, u8 proto
, u32 reqid
)
927 struct xfrm_state
*rx
= NULL
, *x
= NULL
;
929 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
930 h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
931 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
932 if (x
->props
.family
== family
&&
933 x
->props
.reqid
== reqid
&&
934 (mark
& x
->mark
.m
) == x
->mark
.v
&&
935 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
936 xfrm_state_addr_check(x
, daddr
, saddr
, family
) &&
937 mode
== x
->props
.mode
&&
938 proto
== x
->id
.proto
&&
939 x
->km
.state
== XFRM_STATE_VALID
) {
947 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
952 EXPORT_SYMBOL(xfrm_stateonly_find
);
954 struct xfrm_state
*xfrm_state_lookup_byspi(struct net
*net
, __be32 spi
,
955 unsigned short family
)
957 struct xfrm_state
*x
;
958 struct xfrm_state_walk
*w
;
960 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
961 list_for_each_entry(w
, &net
->xfrm
.state_all
, all
) {
962 x
= container_of(w
, struct xfrm_state
, km
);
963 if (x
->props
.family
!= family
||
968 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
971 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
974 EXPORT_SYMBOL(xfrm_state_lookup_byspi
);
976 static void __xfrm_state_insert(struct xfrm_state
*x
)
978 struct net
*net
= xs_net(x
);
981 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
983 h
= xfrm_dst_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
,
984 x
->props
.reqid
, x
->props
.family
);
985 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
987 h
= xfrm_src_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
, x
->props
.family
);
988 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
991 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
,
994 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
997 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
998 if (x
->replay_maxage
)
999 mod_timer(&x
->rtimer
, jiffies
+ x
->replay_maxage
);
1001 net
->xfrm
.state_num
++;
1003 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1006 /* net->xfrm.xfrm_state_lock is held */
1007 static void __xfrm_state_bump_genids(struct xfrm_state
*xnew
)
1009 struct net
*net
= xs_net(xnew
);
1010 unsigned short family
= xnew
->props
.family
;
1011 u32 reqid
= xnew
->props
.reqid
;
1012 struct xfrm_state
*x
;
1014 u32 mark
= xnew
->mark
.v
& xnew
->mark
.m
;
1016 h
= xfrm_dst_hash(net
, &xnew
->id
.daddr
, &xnew
->props
.saddr
, reqid
, family
);
1017 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1018 if (x
->props
.family
== family
&&
1019 x
->props
.reqid
== reqid
&&
1020 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1021 xfrm_addr_equal(&x
->id
.daddr
, &xnew
->id
.daddr
, family
) &&
1022 xfrm_addr_equal(&x
->props
.saddr
, &xnew
->props
.saddr
, family
))
1027 void xfrm_state_insert(struct xfrm_state
*x
)
1029 struct net
*net
= xs_net(x
);
1031 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1032 __xfrm_state_bump_genids(x
);
1033 __xfrm_state_insert(x
);
1034 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1036 EXPORT_SYMBOL(xfrm_state_insert
);
1038 /* net->xfrm.xfrm_state_lock is held */
1039 static struct xfrm_state
*__find_acq_core(struct net
*net
,
1040 const struct xfrm_mark
*m
,
1041 unsigned short family
, u8 mode
,
1042 u32 reqid
, u8 proto
,
1043 const xfrm_address_t
*daddr
,
1044 const xfrm_address_t
*saddr
,
1047 unsigned int h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
1048 struct xfrm_state
*x
;
1049 u32 mark
= m
->v
& m
->m
;
1051 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1052 if (x
->props
.reqid
!= reqid
||
1053 x
->props
.mode
!= mode
||
1054 x
->props
.family
!= family
||
1055 x
->km
.state
!= XFRM_STATE_ACQ
||
1057 x
->id
.proto
!= proto
||
1058 (mark
& x
->mark
.m
) != x
->mark
.v
||
1059 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
) ||
1060 !xfrm_addr_equal(&x
->props
.saddr
, saddr
, family
))
1070 x
= xfrm_state_alloc(net
);
1074 x
->sel
.daddr
.a4
= daddr
->a4
;
1075 x
->sel
.saddr
.a4
= saddr
->a4
;
1076 x
->sel
.prefixlen_d
= 32;
1077 x
->sel
.prefixlen_s
= 32;
1078 x
->props
.saddr
.a4
= saddr
->a4
;
1079 x
->id
.daddr
.a4
= daddr
->a4
;
1083 x
->sel
.daddr
.in6
= daddr
->in6
;
1084 x
->sel
.saddr
.in6
= saddr
->in6
;
1085 x
->sel
.prefixlen_d
= 128;
1086 x
->sel
.prefixlen_s
= 128;
1087 x
->props
.saddr
.in6
= saddr
->in6
;
1088 x
->id
.daddr
.in6
= daddr
->in6
;
1092 x
->km
.state
= XFRM_STATE_ACQ
;
1093 x
->id
.proto
= proto
;
1094 x
->props
.family
= family
;
1095 x
->props
.mode
= mode
;
1096 x
->props
.reqid
= reqid
;
1099 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
1101 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
1102 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
1103 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
1104 h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
1105 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
1107 net
->xfrm
.state_num
++;
1109 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1115 static struct xfrm_state
*__xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1117 int xfrm_state_add(struct xfrm_state
*x
)
1119 struct net
*net
= xs_net(x
);
1120 struct xfrm_state
*x1
, *to_put
;
1123 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1124 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1126 family
= x
->props
.family
;
1130 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1132 x1
= __xfrm_state_locate(x
, use_spi
, family
);
1140 if (use_spi
&& x
->km
.seq
) {
1141 x1
= __xfrm_find_acq_byseq(net
, mark
, x
->km
.seq
);
1142 if (x1
&& ((x1
->id
.proto
!= x
->id
.proto
) ||
1143 !xfrm_addr_equal(&x1
->id
.daddr
, &x
->id
.daddr
, family
))) {
1150 x1
= __find_acq_core(net
, &x
->mark
, family
, x
->props
.mode
,
1151 x
->props
.reqid
, x
->id
.proto
,
1152 &x
->id
.daddr
, &x
->props
.saddr
, 0);
1154 __xfrm_state_bump_genids(x
);
1155 __xfrm_state_insert(x
);
1159 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1162 xfrm_state_delete(x1
);
1167 xfrm_state_put(to_put
);
1171 EXPORT_SYMBOL(xfrm_state_add
);
1173 #ifdef CONFIG_XFRM_MIGRATE
1174 static struct xfrm_state
*xfrm_state_clone(struct xfrm_state
*orig
)
1176 struct net
*net
= xs_net(orig
);
1177 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1181 memcpy(&x
->id
, &orig
->id
, sizeof(x
->id
));
1182 memcpy(&x
->sel
, &orig
->sel
, sizeof(x
->sel
));
1183 memcpy(&x
->lft
, &orig
->lft
, sizeof(x
->lft
));
1184 x
->props
.mode
= orig
->props
.mode
;
1185 x
->props
.replay_window
= orig
->props
.replay_window
;
1186 x
->props
.reqid
= orig
->props
.reqid
;
1187 x
->props
.family
= orig
->props
.family
;
1188 x
->props
.saddr
= orig
->props
.saddr
;
1191 x
->aalg
= xfrm_algo_auth_clone(orig
->aalg
);
1195 x
->props
.aalgo
= orig
->props
.aalgo
;
1198 x
->aead
= xfrm_algo_aead_clone(orig
->aead
);
1203 x
->ealg
= xfrm_algo_clone(orig
->ealg
);
1207 x
->props
.ealgo
= orig
->props
.ealgo
;
1210 x
->calg
= xfrm_algo_clone(orig
->calg
);
1214 x
->props
.calgo
= orig
->props
.calgo
;
1217 x
->encap
= kmemdup(orig
->encap
, sizeof(*x
->encap
), GFP_KERNEL
);
1223 x
->coaddr
= kmemdup(orig
->coaddr
, sizeof(*x
->coaddr
),
1229 if (orig
->replay_esn
) {
1230 if (xfrm_replay_clone(x
, orig
))
1234 memcpy(&x
->mark
, &orig
->mark
, sizeof(x
->mark
));
1236 if (xfrm_init_state(x
) < 0)
1239 x
->props
.flags
= orig
->props
.flags
;
1240 x
->props
.extra_flags
= orig
->props
.extra_flags
;
1242 x
->tfcpad
= orig
->tfcpad
;
1243 x
->replay_maxdiff
= orig
->replay_maxdiff
;
1244 x
->replay_maxage
= orig
->replay_maxage
;
1245 x
->curlft
.add_time
= orig
->curlft
.add_time
;
1246 x
->km
.state
= orig
->km
.state
;
1247 x
->km
.seq
= orig
->km
.seq
;
1257 struct xfrm_state
*xfrm_migrate_state_find(struct xfrm_migrate
*m
, struct net
*net
)
1260 struct xfrm_state
*x
= NULL
;
1262 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1265 h
= xfrm_dst_hash(net
, &m
->old_daddr
, &m
->old_saddr
,
1266 m
->reqid
, m
->old_family
);
1267 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1268 if (x
->props
.mode
!= m
->mode
||
1269 x
->id
.proto
!= m
->proto
)
1271 if (m
->reqid
&& x
->props
.reqid
!= m
->reqid
)
1273 if (!xfrm_addr_equal(&x
->id
.daddr
, &m
->old_daddr
,
1275 !xfrm_addr_equal(&x
->props
.saddr
, &m
->old_saddr
,
1282 h
= xfrm_src_hash(net
, &m
->old_daddr
, &m
->old_saddr
,
1284 hlist_for_each_entry(x
, net
->xfrm
.state_bysrc
+h
, bysrc
) {
1285 if (x
->props
.mode
!= m
->mode
||
1286 x
->id
.proto
!= m
->proto
)
1288 if (!xfrm_addr_equal(&x
->id
.daddr
, &m
->old_daddr
,
1290 !xfrm_addr_equal(&x
->props
.saddr
, &m
->old_saddr
,
1298 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1302 EXPORT_SYMBOL(xfrm_migrate_state_find
);
1304 struct xfrm_state
*xfrm_state_migrate(struct xfrm_state
*x
,
1305 struct xfrm_migrate
*m
)
1307 struct xfrm_state
*xc
;
1309 xc
= xfrm_state_clone(x
);
1313 memcpy(&xc
->id
.daddr
, &m
->new_daddr
, sizeof(xc
->id
.daddr
));
1314 memcpy(&xc
->props
.saddr
, &m
->new_saddr
, sizeof(xc
->props
.saddr
));
1317 if (xfrm_addr_equal(&x
->id
.daddr
, &m
->new_daddr
, m
->new_family
)) {
1318 /* a care is needed when the destination address of the
1319 state is to be updated as it is a part of triplet */
1320 xfrm_state_insert(xc
);
1322 if (xfrm_state_add(xc
) < 0)
1331 EXPORT_SYMBOL(xfrm_state_migrate
);
1334 int xfrm_state_update(struct xfrm_state
*x
)
1336 struct xfrm_state
*x1
, *to_put
;
1338 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1339 struct net
*net
= xs_net(x
);
1343 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1344 x1
= __xfrm_state_locate(x
, use_spi
, x
->props
.family
);
1350 if (xfrm_state_kern(x1
)) {
1356 if (x1
->km
.state
== XFRM_STATE_ACQ
) {
1357 __xfrm_state_insert(x
);
1363 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1366 xfrm_state_put(to_put
);
1372 xfrm_state_delete(x1
);
1378 spin_lock_bh(&x1
->lock
);
1379 if (likely(x1
->km
.state
== XFRM_STATE_VALID
)) {
1380 if (x
->encap
&& x1
->encap
)
1381 memcpy(x1
->encap
, x
->encap
, sizeof(*x1
->encap
));
1382 if (x
->coaddr
&& x1
->coaddr
) {
1383 memcpy(x1
->coaddr
, x
->coaddr
, sizeof(*x1
->coaddr
));
1385 if (!use_spi
&& memcmp(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
)))
1386 memcpy(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
));
1387 memcpy(&x1
->lft
, &x
->lft
, sizeof(x1
->lft
));
1390 tasklet_hrtimer_start(&x1
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
1391 if (x1
->curlft
.use_time
)
1392 xfrm_state_check_expire(x1
);
1395 x
->km
.state
= XFRM_STATE_DEAD
;
1396 __xfrm_state_put(x
);
1398 spin_unlock_bh(&x1
->lock
);
1404 EXPORT_SYMBOL(xfrm_state_update
);
1406 int xfrm_state_check_expire(struct xfrm_state
*x
)
1408 if (!x
->curlft
.use_time
)
1409 x
->curlft
.use_time
= get_seconds();
1411 if (x
->curlft
.bytes
>= x
->lft
.hard_byte_limit
||
1412 x
->curlft
.packets
>= x
->lft
.hard_packet_limit
) {
1413 x
->km
.state
= XFRM_STATE_EXPIRED
;
1414 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(0, 0), HRTIMER_MODE_REL
);
1419 (x
->curlft
.bytes
>= x
->lft
.soft_byte_limit
||
1420 x
->curlft
.packets
>= x
->lft
.soft_packet_limit
)) {
1422 km_state_expired(x
, 0, 0);
1426 EXPORT_SYMBOL(xfrm_state_check_expire
);
1429 xfrm_state_lookup(struct net
*net
, u32 mark
, const xfrm_address_t
*daddr
, __be32 spi
,
1430 u8 proto
, unsigned short family
)
1432 struct xfrm_state
*x
;
1434 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1435 x
= __xfrm_state_lookup(net
, mark
, daddr
, spi
, proto
, family
);
1436 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1439 EXPORT_SYMBOL(xfrm_state_lookup
);
1442 xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1443 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1444 u8 proto
, unsigned short family
)
1446 struct xfrm_state
*x
;
1448 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1449 x
= __xfrm_state_lookup_byaddr(net
, mark
, daddr
, saddr
, proto
, family
);
1450 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1453 EXPORT_SYMBOL(xfrm_state_lookup_byaddr
);
1456 xfrm_find_acq(struct net
*net
, const struct xfrm_mark
*mark
, u8 mode
, u32 reqid
,
1457 u8 proto
, const xfrm_address_t
*daddr
,
1458 const xfrm_address_t
*saddr
, int create
, unsigned short family
)
1460 struct xfrm_state
*x
;
1462 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1463 x
= __find_acq_core(net
, mark
, family
, mode
, reqid
, proto
, daddr
, saddr
, create
);
1464 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1468 EXPORT_SYMBOL(xfrm_find_acq
);
1470 #ifdef CONFIG_XFRM_SUB_POLICY
1472 xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
,
1473 unsigned short family
, struct net
*net
)
1476 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
1478 return -EAFNOSUPPORT
;
1480 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
); /*FIXME*/
1481 if (afinfo
->tmpl_sort
)
1482 err
= afinfo
->tmpl_sort(dst
, src
, n
);
1483 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1484 xfrm_state_put_afinfo(afinfo
);
1487 EXPORT_SYMBOL(xfrm_tmpl_sort
);
1490 xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
,
1491 unsigned short family
)
1494 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
1495 struct net
*net
= xs_net(*src
);
1498 return -EAFNOSUPPORT
;
1500 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1501 if (afinfo
->state_sort
)
1502 err
= afinfo
->state_sort(dst
, src
, n
);
1503 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1504 xfrm_state_put_afinfo(afinfo
);
1507 EXPORT_SYMBOL(xfrm_state_sort
);
1510 /* Silly enough, but I'm lazy to build resolution list */
1512 static struct xfrm_state
*__xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
)
1516 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
1517 struct xfrm_state
*x
;
1519 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
1520 if (x
->km
.seq
== seq
&&
1521 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1522 x
->km
.state
== XFRM_STATE_ACQ
) {
1531 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
)
1533 struct xfrm_state
*x
;
1535 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1536 x
= __xfrm_find_acq_byseq(net
, mark
, seq
);
1537 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1540 EXPORT_SYMBOL(xfrm_find_acq_byseq
);
1542 u32
xfrm_get_acqseq(void)
1545 static atomic_t acqseq
;
1548 res
= atomic_inc_return(&acqseq
);
1553 EXPORT_SYMBOL(xfrm_get_acqseq
);
1555 int verify_spi_info(u8 proto
, u32 min
, u32 max
)
1563 /* IPCOMP spi is 16-bits. */
1577 EXPORT_SYMBOL(verify_spi_info
);
1579 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 low
, u32 high
)
1581 struct net
*net
= xs_net(x
);
1583 struct xfrm_state
*x0
;
1585 __be32 minspi
= htonl(low
);
1586 __be32 maxspi
= htonl(high
);
1587 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1589 spin_lock_bh(&x
->lock
);
1590 if (x
->km
.state
== XFRM_STATE_DEAD
)
1599 if (minspi
== maxspi
) {
1600 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, minspi
, x
->id
.proto
, x
->props
.family
);
1608 for (h
= 0; h
< high
-low
+1; h
++) {
1609 spi
= low
+ prandom_u32()%(high
-low
+1);
1610 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, htonl(spi
), x
->id
.proto
, x
->props
.family
);
1612 x
->id
.spi
= htonl(spi
);
1619 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1620 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, x
->props
.family
);
1621 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
1622 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1628 spin_unlock_bh(&x
->lock
);
1632 EXPORT_SYMBOL(xfrm_alloc_spi
);
1634 static bool __xfrm_state_filter_match(struct xfrm_state
*x
,
1635 struct xfrm_address_filter
*filter
)
1638 if ((filter
->family
== AF_INET
||
1639 filter
->family
== AF_INET6
) &&
1640 x
->props
.family
!= filter
->family
)
1643 return addr_match(&x
->props
.saddr
, &filter
->saddr
,
1645 addr_match(&x
->id
.daddr
, &filter
->daddr
,
1651 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1652 int (*func
)(struct xfrm_state
*, int, void*),
1655 struct xfrm_state
*state
;
1656 struct xfrm_state_walk
*x
;
1659 if (walk
->seq
!= 0 && list_empty(&walk
->all
))
1662 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1663 if (list_empty(&walk
->all
))
1664 x
= list_first_entry(&net
->xfrm
.state_all
, struct xfrm_state_walk
, all
);
1666 x
= list_first_entry(&walk
->all
, struct xfrm_state_walk
, all
);
1667 list_for_each_entry_from(x
, &net
->xfrm
.state_all
, all
) {
1668 if (x
->state
== XFRM_STATE_DEAD
)
1670 state
= container_of(x
, struct xfrm_state
, km
);
1671 if (!xfrm_id_proto_match(state
->id
.proto
, walk
->proto
))
1673 if (!__xfrm_state_filter_match(state
, walk
->filter
))
1675 err
= func(state
, walk
->seq
, data
);
1677 list_move_tail(&walk
->all
, &x
->all
);
1682 if (walk
->seq
== 0) {
1686 list_del_init(&walk
->all
);
1688 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1691 EXPORT_SYMBOL(xfrm_state_walk
);
1693 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
,
1694 struct xfrm_address_filter
*filter
)
1696 INIT_LIST_HEAD(&walk
->all
);
1697 walk
->proto
= proto
;
1698 walk
->state
= XFRM_STATE_DEAD
;
1700 walk
->filter
= filter
;
1702 EXPORT_SYMBOL(xfrm_state_walk_init
);
1704 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
, struct net
*net
)
1706 kfree(walk
->filter
);
1708 if (list_empty(&walk
->all
))
1711 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1712 list_del(&walk
->all
);
1713 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1715 EXPORT_SYMBOL(xfrm_state_walk_done
);
1717 static void xfrm_replay_timer_handler(unsigned long data
)
1719 struct xfrm_state
*x
= (struct xfrm_state
*)data
;
1721 spin_lock(&x
->lock
);
1723 if (x
->km
.state
== XFRM_STATE_VALID
) {
1724 if (xfrm_aevent_is_on(xs_net(x
)))
1725 x
->repl
->notify(x
, XFRM_REPLAY_TIMEOUT
);
1727 x
->xflags
|= XFRM_TIME_DEFER
;
1730 spin_unlock(&x
->lock
);
1733 static LIST_HEAD(xfrm_km_list
);
1735 void km_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
1737 struct xfrm_mgr
*km
;
1740 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
)
1741 if (km
->notify_policy
)
1742 km
->notify_policy(xp
, dir
, c
);
1746 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
1748 struct xfrm_mgr
*km
;
1750 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
)
1756 EXPORT_SYMBOL(km_policy_notify
);
1757 EXPORT_SYMBOL(km_state_notify
);
1759 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
)
1765 c
.event
= XFRM_MSG_EXPIRE
;
1766 km_state_notify(x
, &c
);
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
;
1780 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1781 acqret
= km
->acquire(x
, t
, pol
);
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
;
1796 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1797 if (km
->new_mapping
)
1798 err
= km
->new_mapping(x
, ipaddr
, sport
);
1805 EXPORT_SYMBOL(km_new_mapping
);
1807 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 portid
)
1813 c
.event
= XFRM_MSG_POLEXPIRE
;
1814 km_policy_notify(pol
, dir
, &c
);
1816 EXPORT_SYMBOL(km_policy_expired
);
1818 #ifdef CONFIG_XFRM_MIGRATE
1819 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1820 const struct xfrm_migrate
*m
, int num_migrate
,
1821 const struct xfrm_kmaddress
*k
)
1825 struct xfrm_mgr
*km
;
1828 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1830 ret
= km
->migrate(sel
, dir
, type
, m
, num_migrate
, k
);
1838 EXPORT_SYMBOL(km_migrate
);
1841 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
1845 struct xfrm_mgr
*km
;
1848 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1850 ret
= km
->report(net
, proto
, sel
, addr
);
1858 EXPORT_SYMBOL(km_report
);
1860 bool km_is_alive(const struct km_event
*c
)
1862 struct xfrm_mgr
*km
;
1863 bool is_alive
= false;
1866 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1867 if (km
->is_alive
&& km
->is_alive(c
)) {
1876 EXPORT_SYMBOL(km_is_alive
);
1878 int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1882 struct xfrm_mgr
*km
;
1883 struct xfrm_policy
*pol
= NULL
;
1885 if (optlen
<= 0 || optlen
> PAGE_SIZE
)
1888 data
= kmalloc(optlen
, GFP_KERNEL
);
1893 if (copy_from_user(data
, optval
, optlen
))
1898 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1899 pol
= km
->compile_policy(sk
, optname
, data
,
1907 xfrm_sk_policy_insert(sk
, err
, pol
);
1916 EXPORT_SYMBOL(xfrm_user_policy
);
1918 static DEFINE_SPINLOCK(xfrm_km_lock
);
1920 int xfrm_register_km(struct xfrm_mgr
*km
)
1922 spin_lock_bh(&xfrm_km_lock
);
1923 list_add_tail_rcu(&km
->list
, &xfrm_km_list
);
1924 spin_unlock_bh(&xfrm_km_lock
);
1927 EXPORT_SYMBOL(xfrm_register_km
);
1929 int xfrm_unregister_km(struct xfrm_mgr
*km
)
1931 spin_lock_bh(&xfrm_km_lock
);
1932 list_del_rcu(&km
->list
);
1933 spin_unlock_bh(&xfrm_km_lock
);
1937 EXPORT_SYMBOL(xfrm_unregister_km
);
1939 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
)
1942 if (unlikely(afinfo
== NULL
))
1944 if (unlikely(afinfo
->family
>= NPROTO
))
1945 return -EAFNOSUPPORT
;
1946 spin_lock_bh(&xfrm_state_afinfo_lock
);
1947 if (unlikely(xfrm_state_afinfo
[afinfo
->family
] != NULL
))
1950 rcu_assign_pointer(xfrm_state_afinfo
[afinfo
->family
], afinfo
);
1951 spin_unlock_bh(&xfrm_state_afinfo_lock
);
1954 EXPORT_SYMBOL(xfrm_state_register_afinfo
);
1956 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
)
1959 if (unlikely(afinfo
== NULL
))
1961 if (unlikely(afinfo
->family
>= NPROTO
))
1962 return -EAFNOSUPPORT
;
1963 spin_lock_bh(&xfrm_state_afinfo_lock
);
1964 if (likely(xfrm_state_afinfo
[afinfo
->family
] != NULL
)) {
1965 if (unlikely(xfrm_state_afinfo
[afinfo
->family
] != afinfo
))
1968 RCU_INIT_POINTER(xfrm_state_afinfo
[afinfo
->family
], NULL
);
1970 spin_unlock_bh(&xfrm_state_afinfo_lock
);
1974 EXPORT_SYMBOL(xfrm_state_unregister_afinfo
);
1976 struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
)
1978 struct xfrm_state_afinfo
*afinfo
;
1979 if (unlikely(family
>= NPROTO
))
1982 afinfo
= rcu_dereference(xfrm_state_afinfo
[family
]);
1983 if (unlikely(!afinfo
))
1988 void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
)
1993 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1994 void xfrm_state_delete_tunnel(struct xfrm_state
*x
)
1997 struct xfrm_state
*t
= x
->tunnel
;
1999 if (atomic_read(&t
->tunnel_users
) == 2)
2000 xfrm_state_delete(t
);
2001 atomic_dec(&t
->tunnel_users
);
2006 EXPORT_SYMBOL(xfrm_state_delete_tunnel
);
2008 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
)
2012 spin_lock_bh(&x
->lock
);
2013 if (x
->km
.state
== XFRM_STATE_VALID
&&
2014 x
->type
&& x
->type
->get_mtu
)
2015 res
= x
->type
->get_mtu(x
, mtu
);
2017 res
= mtu
- x
->props
.header_len
;
2018 spin_unlock_bh(&x
->lock
);
2022 int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
)
2024 struct xfrm_state_afinfo
*afinfo
;
2025 struct xfrm_mode
*inner_mode
;
2026 int family
= x
->props
.family
;
2029 err
= -EAFNOSUPPORT
;
2030 afinfo
= xfrm_state_get_afinfo(family
);
2035 if (afinfo
->init_flags
)
2036 err
= afinfo
->init_flags(x
);
2038 xfrm_state_put_afinfo(afinfo
);
2043 err
= -EPROTONOSUPPORT
;
2045 if (x
->sel
.family
!= AF_UNSPEC
) {
2046 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->sel
.family
);
2047 if (inner_mode
== NULL
)
2050 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
) &&
2051 family
!= x
->sel
.family
) {
2052 xfrm_put_mode(inner_mode
);
2056 x
->inner_mode
= inner_mode
;
2058 struct xfrm_mode
*inner_mode_iaf
;
2059 int iafamily
= AF_INET
;
2061 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->props
.family
);
2062 if (inner_mode
== NULL
)
2065 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
)) {
2066 xfrm_put_mode(inner_mode
);
2069 x
->inner_mode
= inner_mode
;
2071 if (x
->props
.family
== AF_INET
)
2072 iafamily
= AF_INET6
;
2074 inner_mode_iaf
= xfrm_get_mode(x
->props
.mode
, iafamily
);
2075 if (inner_mode_iaf
) {
2076 if (inner_mode_iaf
->flags
& XFRM_MODE_FLAG_TUNNEL
)
2077 x
->inner_mode_iaf
= inner_mode_iaf
;
2079 xfrm_put_mode(inner_mode_iaf
);
2083 x
->type
= xfrm_get_type(x
->id
.proto
, family
);
2084 if (x
->type
== NULL
)
2087 err
= x
->type
->init_state(x
);
2091 x
->outer_mode
= xfrm_get_mode(x
->props
.mode
, family
);
2092 if (x
->outer_mode
== NULL
) {
2093 err
= -EPROTONOSUPPORT
;
2098 err
= xfrm_init_replay(x
);
2103 x
->km
.state
= XFRM_STATE_VALID
;
2109 EXPORT_SYMBOL(__xfrm_init_state
);
2111 int xfrm_init_state(struct xfrm_state
*x
)
2113 return __xfrm_init_state(x
, true);
2116 EXPORT_SYMBOL(xfrm_init_state
);
2118 int __net_init
xfrm_state_init(struct net
*net
)
2122 INIT_LIST_HEAD(&net
->xfrm
.state_all
);
2124 sz
= sizeof(struct hlist_head
) * 8;
2126 net
->xfrm
.state_bydst
= xfrm_hash_alloc(sz
);
2127 if (!net
->xfrm
.state_bydst
)
2129 net
->xfrm
.state_bysrc
= xfrm_hash_alloc(sz
);
2130 if (!net
->xfrm
.state_bysrc
)
2132 net
->xfrm
.state_byspi
= xfrm_hash_alloc(sz
);
2133 if (!net
->xfrm
.state_byspi
)
2135 net
->xfrm
.state_hmask
= ((sz
/ sizeof(struct hlist_head
)) - 1);
2137 net
->xfrm
.state_num
= 0;
2138 INIT_WORK(&net
->xfrm
.state_hash_work
, xfrm_hash_resize
);
2139 spin_lock_init(&net
->xfrm
.xfrm_state_lock
);
2143 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2145 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2150 void xfrm_state_fini(struct net
*net
)
2154 flush_work(&net
->xfrm
.state_hash_work
);
2155 xfrm_state_flush(net
, IPSEC_PROTO_ANY
, false);
2156 flush_work(&xfrm_state_gc_work
);
2158 WARN_ON(!list_empty(&net
->xfrm
.state_all
));
2160 sz
= (net
->xfrm
.state_hmask
+ 1) * sizeof(struct hlist_head
);
2161 WARN_ON(!hlist_empty(net
->xfrm
.state_byspi
));
2162 xfrm_hash_free(net
->xfrm
.state_byspi
, sz
);
2163 WARN_ON(!hlist_empty(net
->xfrm
.state_bysrc
));
2164 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2165 WARN_ON(!hlist_empty(net
->xfrm
.state_bydst
));
2166 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2169 #ifdef CONFIG_AUDITSYSCALL
2170 static void xfrm_audit_helper_sainfo(struct xfrm_state
*x
,
2171 struct audit_buffer
*audit_buf
)
2173 struct xfrm_sec_ctx
*ctx
= x
->security
;
2174 u32 spi
= ntohl(x
->id
.spi
);
2177 audit_log_format(audit_buf
, " sec_alg=%u sec_doi=%u sec_obj=%s",
2178 ctx
->ctx_alg
, ctx
->ctx_doi
, ctx
->ctx_str
);
2180 switch (x
->props
.family
) {
2182 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2183 &x
->props
.saddr
.a4
, &x
->id
.daddr
.a4
);
2186 audit_log_format(audit_buf
, " src=%pI6 dst=%pI6",
2187 x
->props
.saddr
.a6
, x
->id
.daddr
.a6
);
2191 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2194 static void xfrm_audit_helper_pktinfo(struct sk_buff
*skb
, u16 family
,
2195 struct audit_buffer
*audit_buf
)
2197 const struct iphdr
*iph4
;
2198 const struct ipv6hdr
*iph6
;
2203 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2204 &iph4
->saddr
, &iph4
->daddr
);
2207 iph6
= ipv6_hdr(skb
);
2208 audit_log_format(audit_buf
,
2209 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2210 &iph6
->saddr
, &iph6
->daddr
,
2211 iph6
->flow_lbl
[0] & 0x0f,
2218 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
, bool task_valid
)
2220 struct audit_buffer
*audit_buf
;
2222 audit_buf
= xfrm_audit_start("SAD-add");
2223 if (audit_buf
== NULL
)
2225 xfrm_audit_helper_usrinfo(task_valid
, audit_buf
);
2226 xfrm_audit_helper_sainfo(x
, audit_buf
);
2227 audit_log_format(audit_buf
, " res=%u", result
);
2228 audit_log_end(audit_buf
);
2230 EXPORT_SYMBOL_GPL(xfrm_audit_state_add
);
2232 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
, bool task_valid
)
2234 struct audit_buffer
*audit_buf
;
2236 audit_buf
= xfrm_audit_start("SAD-delete");
2237 if (audit_buf
== NULL
)
2239 xfrm_audit_helper_usrinfo(task_valid
, audit_buf
);
2240 xfrm_audit_helper_sainfo(x
, audit_buf
);
2241 audit_log_format(audit_buf
, " res=%u", result
);
2242 audit_log_end(audit_buf
);
2244 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete
);
2246 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
2247 struct sk_buff
*skb
)
2249 struct audit_buffer
*audit_buf
;
2252 audit_buf
= xfrm_audit_start("SA-replay-overflow");
2253 if (audit_buf
== NULL
)
2255 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2256 /* don't record the sequence number because it's inherent in this kind
2257 * of audit message */
2258 spi
= ntohl(x
->id
.spi
);
2259 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2260 audit_log_end(audit_buf
);
2262 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow
);
2264 void xfrm_audit_state_replay(struct xfrm_state
*x
,
2265 struct sk_buff
*skb
, __be32 net_seq
)
2267 struct audit_buffer
*audit_buf
;
2270 audit_buf
= xfrm_audit_start("SA-replayed-pkt");
2271 if (audit_buf
== NULL
)
2273 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2274 spi
= ntohl(x
->id
.spi
);
2275 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2276 spi
, spi
, ntohl(net_seq
));
2277 audit_log_end(audit_buf
);
2279 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay
);
2281 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
)
2283 struct audit_buffer
*audit_buf
;
2285 audit_buf
= xfrm_audit_start("SA-notfound");
2286 if (audit_buf
== NULL
)
2288 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2289 audit_log_end(audit_buf
);
2291 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple
);
2293 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
2294 __be32 net_spi
, __be32 net_seq
)
2296 struct audit_buffer
*audit_buf
;
2299 audit_buf
= xfrm_audit_start("SA-notfound");
2300 if (audit_buf
== NULL
)
2302 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2303 spi
= ntohl(net_spi
);
2304 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2305 spi
, spi
, ntohl(net_seq
));
2306 audit_log_end(audit_buf
);
2308 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound
);
2310 void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
2311 struct sk_buff
*skb
, u8 proto
)
2313 struct audit_buffer
*audit_buf
;
2317 audit_buf
= xfrm_audit_start("SA-icv-failure");
2318 if (audit_buf
== NULL
)
2320 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2321 if (xfrm_parse_spi(skb
, proto
, &net_spi
, &net_seq
) == 0) {
2322 u32 spi
= ntohl(net_spi
);
2323 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2324 spi
, spi
, ntohl(net_seq
));
2326 audit_log_end(audit_buf
);
2328 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail
);
2329 #endif /* CONFIG_AUDITSYSCALL */