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 <linux/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 refcount_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
);
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
);
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
= READ_ONCE(typemap
[proto
]);
235 if (unlikely(type
&& !try_module_get(type
->owner
)))
240 if (!type
&& !modload_attempted
) {
241 request_module("xfrm-type-%d-%d", family
, proto
);
242 modload_attempted
= 1;
249 static void xfrm_put_type(const struct xfrm_type
*type
)
251 module_put(type
->owner
);
254 static DEFINE_SPINLOCK(xfrm_type_offload_lock
);
255 int xfrm_register_type_offload(const struct xfrm_type_offload
*type
,
256 unsigned short family
)
258 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
259 const struct xfrm_type_offload
**typemap
;
262 if (unlikely(afinfo
== NULL
))
263 return -EAFNOSUPPORT
;
264 typemap
= afinfo
->type_offload_map
;
265 spin_lock_bh(&xfrm_type_offload_lock
);
267 if (likely(typemap
[type
->proto
] == NULL
))
268 typemap
[type
->proto
] = type
;
271 spin_unlock_bh(&xfrm_type_offload_lock
);
275 EXPORT_SYMBOL(xfrm_register_type_offload
);
277 int xfrm_unregister_type_offload(const struct xfrm_type_offload
*type
,
278 unsigned short family
)
280 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
281 const struct xfrm_type_offload
**typemap
;
284 if (unlikely(afinfo
== NULL
))
285 return -EAFNOSUPPORT
;
286 typemap
= afinfo
->type_offload_map
;
287 spin_lock_bh(&xfrm_type_offload_lock
);
289 if (unlikely(typemap
[type
->proto
] != type
))
292 typemap
[type
->proto
] = NULL
;
293 spin_unlock_bh(&xfrm_type_offload_lock
);
297 EXPORT_SYMBOL(xfrm_unregister_type_offload
);
299 static const struct xfrm_type_offload
*xfrm_get_type_offload(u8 proto
, unsigned short family
)
301 struct xfrm_state_afinfo
*afinfo
;
302 const struct xfrm_type_offload
**typemap
;
303 const struct xfrm_type_offload
*type
;
305 afinfo
= xfrm_state_get_afinfo(family
);
306 if (unlikely(afinfo
== NULL
))
308 typemap
= afinfo
->type_offload_map
;
310 type
= typemap
[proto
];
311 if ((type
&& !try_module_get(type
->owner
)))
318 static void xfrm_put_type_offload(const struct xfrm_type_offload
*type
)
320 module_put(type
->owner
);
323 static DEFINE_SPINLOCK(xfrm_mode_lock
);
324 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
)
326 struct xfrm_state_afinfo
*afinfo
;
327 struct xfrm_mode
**modemap
;
330 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
333 afinfo
= xfrm_state_get_afinfo(family
);
334 if (unlikely(afinfo
== NULL
))
335 return -EAFNOSUPPORT
;
338 modemap
= afinfo
->mode_map
;
339 spin_lock_bh(&xfrm_mode_lock
);
340 if (modemap
[mode
->encap
])
344 if (!try_module_get(afinfo
->owner
))
347 mode
->afinfo
= afinfo
;
348 modemap
[mode
->encap
] = mode
;
352 spin_unlock_bh(&xfrm_mode_lock
);
356 EXPORT_SYMBOL(xfrm_register_mode
);
358 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
)
360 struct xfrm_state_afinfo
*afinfo
;
361 struct xfrm_mode
**modemap
;
364 if (unlikely(mode
->encap
>= XFRM_MODE_MAX
))
367 afinfo
= xfrm_state_get_afinfo(family
);
368 if (unlikely(afinfo
== NULL
))
369 return -EAFNOSUPPORT
;
372 modemap
= afinfo
->mode_map
;
373 spin_lock_bh(&xfrm_mode_lock
);
374 if (likely(modemap
[mode
->encap
] == mode
)) {
375 modemap
[mode
->encap
] = NULL
;
376 module_put(mode
->afinfo
->owner
);
380 spin_unlock_bh(&xfrm_mode_lock
);
384 EXPORT_SYMBOL(xfrm_unregister_mode
);
386 static struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
)
388 struct xfrm_state_afinfo
*afinfo
;
389 struct xfrm_mode
*mode
;
390 int modload_attempted
= 0;
392 if (unlikely(encap
>= XFRM_MODE_MAX
))
396 afinfo
= xfrm_state_get_afinfo(family
);
397 if (unlikely(afinfo
== NULL
))
400 mode
= READ_ONCE(afinfo
->mode_map
[encap
]);
401 if (unlikely(mode
&& !try_module_get(mode
->owner
)))
405 if (!mode
&& !modload_attempted
) {
406 request_module("xfrm-mode-%d-%d", family
, encap
);
407 modload_attempted
= 1;
414 static void xfrm_put_mode(struct xfrm_mode
*mode
)
416 module_put(mode
->owner
);
419 static void xfrm_state_gc_destroy(struct xfrm_state
*x
)
421 tasklet_hrtimer_cancel(&x
->mtimer
);
422 del_timer_sync(&x
->rtimer
);
429 kfree(x
->replay_esn
);
430 kfree(x
->preplay_esn
);
432 xfrm_put_mode(x
->inner_mode
);
433 if (x
->inner_mode_iaf
)
434 xfrm_put_mode(x
->inner_mode_iaf
);
436 xfrm_put_mode(x
->outer_mode
);
438 xfrm_put_type_offload(x
->type_offload
);
440 x
->type
->destructor(x
);
441 xfrm_put_type(x
->type
);
443 xfrm_dev_state_free(x
);
444 security_xfrm_state_free(x
);
448 static void xfrm_state_gc_task(struct work_struct
*work
)
450 struct xfrm_state
*x
;
451 struct hlist_node
*tmp
;
452 struct hlist_head gc_list
;
454 spin_lock_bh(&xfrm_state_gc_lock
);
455 hlist_move_list(&xfrm_state_gc_list
, &gc_list
);
456 spin_unlock_bh(&xfrm_state_gc_lock
);
460 hlist_for_each_entry_safe(x
, tmp
, &gc_list
, gclist
)
461 xfrm_state_gc_destroy(x
);
464 static enum hrtimer_restart
xfrm_timer_handler(struct hrtimer
*me
)
466 struct tasklet_hrtimer
*thr
= container_of(me
, struct tasklet_hrtimer
, timer
);
467 struct xfrm_state
*x
= container_of(thr
, struct xfrm_state
, mtimer
);
468 unsigned long now
= get_seconds();
469 long next
= LONG_MAX
;
474 if (x
->km
.state
== XFRM_STATE_DEAD
)
476 if (x
->km
.state
== XFRM_STATE_EXPIRED
)
478 if (x
->lft
.hard_add_expires_seconds
) {
479 long tmo
= x
->lft
.hard_add_expires_seconds
+
480 x
->curlft
.add_time
- now
;
482 if (x
->xflags
& XFRM_SOFT_EXPIRE
) {
483 /* enter hard expire without soft expire first?!
484 * setting a new date could trigger this.
485 * workaround: fix x->curflt.add_time by below:
487 x
->curlft
.add_time
= now
- x
->saved_tmo
- 1;
488 tmo
= x
->lft
.hard_add_expires_seconds
- x
->saved_tmo
;
495 if (x
->lft
.hard_use_expires_seconds
) {
496 long tmo
= x
->lft
.hard_use_expires_seconds
+
497 (x
->curlft
.use_time
? : now
) - now
;
505 if (x
->lft
.soft_add_expires_seconds
) {
506 long tmo
= x
->lft
.soft_add_expires_seconds
+
507 x
->curlft
.add_time
- now
;
510 x
->xflags
&= ~XFRM_SOFT_EXPIRE
;
511 } else if (tmo
< next
) {
513 x
->xflags
|= XFRM_SOFT_EXPIRE
;
517 if (x
->lft
.soft_use_expires_seconds
) {
518 long tmo
= x
->lft
.soft_use_expires_seconds
+
519 (x
->curlft
.use_time
? : now
) - now
;
528 km_state_expired(x
, 0, 0);
530 if (next
!= LONG_MAX
) {
531 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(next
, 0), HRTIMER_MODE_REL
);
537 if (x
->km
.state
== XFRM_STATE_ACQ
&& x
->id
.spi
== 0)
538 x
->km
.state
= XFRM_STATE_EXPIRED
;
540 err
= __xfrm_state_delete(x
);
542 km_state_expired(x
, 1, 0);
544 xfrm_audit_state_delete(x
, err
? 0 : 1, true);
547 spin_unlock(&x
->lock
);
548 return HRTIMER_NORESTART
;
551 static void xfrm_replay_timer_handler(unsigned long data
);
553 struct xfrm_state
*xfrm_state_alloc(struct net
*net
)
555 struct xfrm_state
*x
;
557 x
= kzalloc(sizeof(struct xfrm_state
), GFP_ATOMIC
);
560 write_pnet(&x
->xs_net
, net
);
561 refcount_set(&x
->refcnt
, 1);
562 atomic_set(&x
->tunnel_users
, 0);
563 INIT_LIST_HEAD(&x
->km
.all
);
564 INIT_HLIST_NODE(&x
->bydst
);
565 INIT_HLIST_NODE(&x
->bysrc
);
566 INIT_HLIST_NODE(&x
->byspi
);
567 tasklet_hrtimer_init(&x
->mtimer
, xfrm_timer_handler
,
568 CLOCK_BOOTTIME
, HRTIMER_MODE_ABS
);
569 setup_timer(&x
->rtimer
, xfrm_replay_timer_handler
,
571 x
->curlft
.add_time
= get_seconds();
572 x
->lft
.soft_byte_limit
= XFRM_INF
;
573 x
->lft
.soft_packet_limit
= XFRM_INF
;
574 x
->lft
.hard_byte_limit
= XFRM_INF
;
575 x
->lft
.hard_packet_limit
= XFRM_INF
;
576 x
->replay_maxage
= 0;
577 x
->replay_maxdiff
= 0;
578 x
->inner_mode
= NULL
;
579 x
->inner_mode_iaf
= NULL
;
580 spin_lock_init(&x
->lock
);
584 EXPORT_SYMBOL(xfrm_state_alloc
);
586 void __xfrm_state_destroy(struct xfrm_state
*x
)
588 WARN_ON(x
->km
.state
!= XFRM_STATE_DEAD
);
590 spin_lock_bh(&xfrm_state_gc_lock
);
591 hlist_add_head(&x
->gclist
, &xfrm_state_gc_list
);
592 spin_unlock_bh(&xfrm_state_gc_lock
);
593 schedule_work(&xfrm_state_gc_work
);
595 EXPORT_SYMBOL(__xfrm_state_destroy
);
597 int __xfrm_state_delete(struct xfrm_state
*x
)
599 struct net
*net
= xs_net(x
);
602 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
603 x
->km
.state
= XFRM_STATE_DEAD
;
604 spin_lock(&net
->xfrm
.xfrm_state_lock
);
605 list_del(&x
->km
.all
);
606 hlist_del_rcu(&x
->bydst
);
607 hlist_del_rcu(&x
->bysrc
);
609 hlist_del_rcu(&x
->byspi
);
610 net
->xfrm
.state_num
--;
611 spin_unlock(&net
->xfrm
.xfrm_state_lock
);
613 xfrm_dev_state_delete(x
);
615 /* All xfrm_state objects are created by xfrm_state_alloc.
616 * The xfrm_state_alloc call gives a reference, and that
617 * is what we are dropping here.
625 EXPORT_SYMBOL(__xfrm_state_delete
);
627 int xfrm_state_delete(struct xfrm_state
*x
)
631 spin_lock_bh(&x
->lock
);
632 err
= __xfrm_state_delete(x
);
633 spin_unlock_bh(&x
->lock
);
637 EXPORT_SYMBOL(xfrm_state_delete
);
639 #ifdef CONFIG_SECURITY_NETWORK_XFRM
641 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, bool task_valid
)
645 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
646 struct xfrm_state
*x
;
648 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
649 if (xfrm_id_proto_match(x
->id
.proto
, proto
) &&
650 (err
= security_xfrm_state_delete(x
)) != 0) {
651 xfrm_audit_state_delete(x
, 0, task_valid
);
661 xfrm_dev_state_flush_secctx_check(struct net
*net
, struct net_device
*dev
, bool task_valid
)
665 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
666 struct xfrm_state
*x
;
667 struct xfrm_state_offload
*xso
;
669 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
672 if (xso
->dev
== dev
&&
673 (err
= security_xfrm_state_delete(x
)) != 0) {
674 xfrm_audit_state_delete(x
, 0, task_valid
);
684 xfrm_state_flush_secctx_check(struct net
*net
, u8 proto
, bool task_valid
)
690 xfrm_dev_state_flush_secctx_check(struct net
*net
, struct net_device
*dev
, bool task_valid
)
696 int xfrm_state_flush(struct net
*net
, u8 proto
, bool task_valid
)
698 int i
, err
= 0, cnt
= 0;
700 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
701 err
= xfrm_state_flush_secctx_check(net
, proto
, task_valid
);
706 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
707 struct xfrm_state
*x
;
709 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
710 if (!xfrm_state_kern(x
) &&
711 xfrm_id_proto_match(x
->id
.proto
, proto
)) {
713 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
715 err
= xfrm_state_delete(x
);
716 xfrm_audit_state_delete(x
, err
? 0 : 1,
722 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
731 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
734 EXPORT_SYMBOL(xfrm_state_flush
);
736 int xfrm_dev_state_flush(struct net
*net
, struct net_device
*dev
, bool task_valid
)
738 int i
, err
= 0, cnt
= 0;
740 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
741 err
= xfrm_dev_state_flush_secctx_check(net
, dev
, task_valid
);
746 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
747 struct xfrm_state
*x
;
748 struct xfrm_state_offload
*xso
;
750 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
753 if (!xfrm_state_kern(x
) && xso
->dev
== dev
) {
755 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
757 err
= xfrm_state_delete(x
);
758 xfrm_audit_state_delete(x
, err
? 0 : 1,
764 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
773 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
776 EXPORT_SYMBOL(xfrm_dev_state_flush
);
778 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
)
780 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
781 si
->sadcnt
= net
->xfrm
.state_num
;
782 si
->sadhcnt
= net
->xfrm
.state_hmask
;
783 si
->sadhmcnt
= xfrm_state_hashmax
;
784 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
786 EXPORT_SYMBOL(xfrm_sad_getinfo
);
789 xfrm_init_tempstate(struct xfrm_state
*x
, const struct flowi
*fl
,
790 const struct xfrm_tmpl
*tmpl
,
791 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
792 unsigned short family
)
794 struct xfrm_state_afinfo
*afinfo
= xfrm_state_afinfo_get_rcu(family
);
799 afinfo
->init_tempsel(&x
->sel
, fl
);
801 if (family
!= tmpl
->encap_family
) {
802 afinfo
= xfrm_state_afinfo_get_rcu(tmpl
->encap_family
);
806 afinfo
->init_temprop(x
, tmpl
, daddr
, saddr
);
809 static struct xfrm_state
*__xfrm_state_lookup(struct net
*net
, u32 mark
,
810 const xfrm_address_t
*daddr
,
811 __be32 spi
, u8 proto
,
812 unsigned short family
)
814 unsigned int h
= xfrm_spi_hash(net
, daddr
, spi
, proto
, family
);
815 struct xfrm_state
*x
;
817 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_byspi
+ h
, byspi
) {
818 if (x
->props
.family
!= family
||
820 x
->id
.proto
!= proto
||
821 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
))
824 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
826 if (!xfrm_state_hold_rcu(x
))
834 static struct xfrm_state
*__xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
835 const xfrm_address_t
*daddr
,
836 const xfrm_address_t
*saddr
,
837 u8 proto
, unsigned short family
)
839 unsigned int h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
840 struct xfrm_state
*x
;
842 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bysrc
+ h
, bysrc
) {
843 if (x
->props
.family
!= family
||
844 x
->id
.proto
!= proto
||
845 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
) ||
846 !xfrm_addr_equal(&x
->props
.saddr
, saddr
, family
))
849 if ((mark
& x
->mark
.m
) != x
->mark
.v
)
851 if (!xfrm_state_hold_rcu(x
))
859 static inline struct xfrm_state
*
860 __xfrm_state_locate(struct xfrm_state
*x
, int use_spi
, int family
)
862 struct net
*net
= xs_net(x
);
863 u32 mark
= x
->mark
.v
& x
->mark
.m
;
866 return __xfrm_state_lookup(net
, mark
, &x
->id
.daddr
,
867 x
->id
.spi
, x
->id
.proto
, family
);
869 return __xfrm_state_lookup_byaddr(net
, mark
,
872 x
->id
.proto
, family
);
875 static void xfrm_hash_grow_check(struct net
*net
, int have_hash_collision
)
877 if (have_hash_collision
&&
878 (net
->xfrm
.state_hmask
+ 1) < xfrm_state_hashmax
&&
879 net
->xfrm
.state_num
> net
->xfrm
.state_hmask
)
880 schedule_work(&net
->xfrm
.state_hash_work
);
883 static void xfrm_state_look_at(struct xfrm_policy
*pol
, struct xfrm_state
*x
,
884 const struct flowi
*fl
, unsigned short family
,
885 struct xfrm_state
**best
, int *acq_in_progress
,
889 * 1. There is a valid state with matching selector. Done.
890 * 2. Valid state with inappropriate selector. Skip.
892 * Entering area of "sysdeps".
894 * 3. If state is not valid, selector is temporary, it selects
895 * only session which triggered previous resolution. Key
896 * manager will do something to install a state with proper
899 if (x
->km
.state
== XFRM_STATE_VALID
) {
900 if ((x
->sel
.family
&&
901 !xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
)) ||
902 !security_xfrm_state_pol_flow_match(x
, pol
, fl
))
906 (*best
)->km
.dying
> x
->km
.dying
||
907 ((*best
)->km
.dying
== x
->km
.dying
&&
908 (*best
)->curlft
.add_time
< x
->curlft
.add_time
))
910 } else if (x
->km
.state
== XFRM_STATE_ACQ
) {
911 *acq_in_progress
= 1;
912 } else if (x
->km
.state
== XFRM_STATE_ERROR
||
913 x
->km
.state
== XFRM_STATE_EXPIRED
) {
914 if (xfrm_selector_match(&x
->sel
, fl
, x
->sel
.family
) &&
915 security_xfrm_state_pol_flow_match(x
, pol
, fl
))
921 xfrm_state_find(const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
922 const struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
923 struct xfrm_policy
*pol
, int *err
,
924 unsigned short family
)
926 static xfrm_address_t saddr_wildcard
= { };
927 struct net
*net
= xp_net(pol
);
928 unsigned int h
, h_wildcard
;
929 struct xfrm_state
*x
, *x0
, *to_put
;
930 int acquire_in_progress
= 0;
932 struct xfrm_state
*best
= NULL
;
933 u32 mark
= pol
->mark
.v
& pol
->mark
.m
;
934 unsigned short encap_family
= tmpl
->encap_family
;
935 unsigned int sequence
;
940 sequence
= read_seqcount_begin(&xfrm_state_hash_generation
);
943 h
= xfrm_dst_hash(net
, daddr
, saddr
, tmpl
->reqid
, encap_family
);
944 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bydst
+ h
, bydst
) {
945 if (x
->props
.family
== encap_family
&&
946 x
->props
.reqid
== tmpl
->reqid
&&
947 (mark
& x
->mark
.m
) == x
->mark
.v
&&
948 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
949 xfrm_state_addr_check(x
, daddr
, saddr
, encap_family
) &&
950 tmpl
->mode
== x
->props
.mode
&&
951 tmpl
->id
.proto
== x
->id
.proto
&&
952 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
953 xfrm_state_look_at(pol
, x
, fl
, encap_family
,
954 &best
, &acquire_in_progress
, &error
);
956 if (best
|| acquire_in_progress
)
959 h_wildcard
= xfrm_dst_hash(net
, daddr
, &saddr_wildcard
, tmpl
->reqid
, encap_family
);
960 hlist_for_each_entry_rcu(x
, net
->xfrm
.state_bydst
+ h_wildcard
, bydst
) {
961 if (x
->props
.family
== encap_family
&&
962 x
->props
.reqid
== tmpl
->reqid
&&
963 (mark
& x
->mark
.m
) == x
->mark
.v
&&
964 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
965 xfrm_addr_equal(&x
->id
.daddr
, daddr
, encap_family
) &&
966 tmpl
->mode
== x
->props
.mode
&&
967 tmpl
->id
.proto
== x
->id
.proto
&&
968 (tmpl
->id
.spi
== x
->id
.spi
|| !tmpl
->id
.spi
))
969 xfrm_state_look_at(pol
, x
, fl
, encap_family
,
970 &best
, &acquire_in_progress
, &error
);
975 if (!x
&& !error
&& !acquire_in_progress
) {
977 (x0
= __xfrm_state_lookup(net
, mark
, daddr
, tmpl
->id
.spi
,
978 tmpl
->id
.proto
, encap_family
)) != NULL
) {
985 /* If the KMs have no listeners (yet...), avoid allocating an SA
986 * for each and every packet - garbage collection might not
989 if (!km_is_alive(&c
)) {
994 x
= xfrm_state_alloc(net
);
999 /* Initialize temporary state matching only
1000 * to current session. */
1001 xfrm_init_tempstate(x
, fl
, tmpl
, daddr
, saddr
, family
);
1002 memcpy(&x
->mark
, &pol
->mark
, sizeof(x
->mark
));
1004 error
= security_xfrm_state_alloc_acquire(x
, pol
->security
, fl
->flowi_secid
);
1006 x
->km
.state
= XFRM_STATE_DEAD
;
1012 if (km_query(x
, tmpl
, pol
) == 0) {
1013 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1014 x
->km
.state
= XFRM_STATE_ACQ
;
1015 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
1016 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
1017 h
= xfrm_src_hash(net
, daddr
, saddr
, encap_family
);
1018 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
1020 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, encap_family
);
1021 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
1023 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
1024 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
1025 net
->xfrm
.state_num
++;
1026 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1027 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1029 x
->km
.state
= XFRM_STATE_DEAD
;
1037 if (!xfrm_state_hold_rcu(x
)) {
1042 *err
= acquire_in_progress
? -EAGAIN
: error
;
1046 xfrm_state_put(to_put
);
1048 if (read_seqcount_retry(&xfrm_state_hash_generation
, sequence
)) {
1060 xfrm_stateonly_find(struct net
*net
, u32 mark
,
1061 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1062 unsigned short family
, u8 mode
, u8 proto
, u32 reqid
)
1065 struct xfrm_state
*rx
= NULL
, *x
= NULL
;
1067 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1068 h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
1069 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1070 if (x
->props
.family
== family
&&
1071 x
->props
.reqid
== reqid
&&
1072 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1073 !(x
->props
.flags
& XFRM_STATE_WILDRECV
) &&
1074 xfrm_state_addr_check(x
, daddr
, saddr
, family
) &&
1075 mode
== x
->props
.mode
&&
1076 proto
== x
->id
.proto
&&
1077 x
->km
.state
== XFRM_STATE_VALID
) {
1084 xfrm_state_hold(rx
);
1085 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1090 EXPORT_SYMBOL(xfrm_stateonly_find
);
1092 struct xfrm_state
*xfrm_state_lookup_byspi(struct net
*net
, __be32 spi
,
1093 unsigned short family
)
1095 struct xfrm_state
*x
;
1096 struct xfrm_state_walk
*w
;
1098 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1099 list_for_each_entry(w
, &net
->xfrm
.state_all
, all
) {
1100 x
= container_of(w
, struct xfrm_state
, km
);
1101 if (x
->props
.family
!= family
||
1106 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1109 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1112 EXPORT_SYMBOL(xfrm_state_lookup_byspi
);
1114 static void __xfrm_state_insert(struct xfrm_state
*x
)
1116 struct net
*net
= xs_net(x
);
1119 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
1121 h
= xfrm_dst_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
,
1122 x
->props
.reqid
, x
->props
.family
);
1123 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
1125 h
= xfrm_src_hash(net
, &x
->id
.daddr
, &x
->props
.saddr
, x
->props
.family
);
1126 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
1129 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
,
1132 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
1135 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
1136 if (x
->replay_maxage
)
1137 mod_timer(&x
->rtimer
, jiffies
+ x
->replay_maxage
);
1139 net
->xfrm
.state_num
++;
1141 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1144 /* net->xfrm.xfrm_state_lock is held */
1145 static void __xfrm_state_bump_genids(struct xfrm_state
*xnew
)
1147 struct net
*net
= xs_net(xnew
);
1148 unsigned short family
= xnew
->props
.family
;
1149 u32 reqid
= xnew
->props
.reqid
;
1150 struct xfrm_state
*x
;
1152 u32 mark
= xnew
->mark
.v
& xnew
->mark
.m
;
1154 h
= xfrm_dst_hash(net
, &xnew
->id
.daddr
, &xnew
->props
.saddr
, reqid
, family
);
1155 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1156 if (x
->props
.family
== family
&&
1157 x
->props
.reqid
== reqid
&&
1158 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1159 xfrm_addr_equal(&x
->id
.daddr
, &xnew
->id
.daddr
, family
) &&
1160 xfrm_addr_equal(&x
->props
.saddr
, &xnew
->props
.saddr
, family
))
1165 void xfrm_state_insert(struct xfrm_state
*x
)
1167 struct net
*net
= xs_net(x
);
1169 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1170 __xfrm_state_bump_genids(x
);
1171 __xfrm_state_insert(x
);
1172 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1174 EXPORT_SYMBOL(xfrm_state_insert
);
1176 /* net->xfrm.xfrm_state_lock is held */
1177 static struct xfrm_state
*__find_acq_core(struct net
*net
,
1178 const struct xfrm_mark
*m
,
1179 unsigned short family
, u8 mode
,
1180 u32 reqid
, u8 proto
,
1181 const xfrm_address_t
*daddr
,
1182 const xfrm_address_t
*saddr
,
1185 unsigned int h
= xfrm_dst_hash(net
, daddr
, saddr
, reqid
, family
);
1186 struct xfrm_state
*x
;
1187 u32 mark
= m
->v
& m
->m
;
1189 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1190 if (x
->props
.reqid
!= reqid
||
1191 x
->props
.mode
!= mode
||
1192 x
->props
.family
!= family
||
1193 x
->km
.state
!= XFRM_STATE_ACQ
||
1195 x
->id
.proto
!= proto
||
1196 (mark
& x
->mark
.m
) != x
->mark
.v
||
1197 !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
) ||
1198 !xfrm_addr_equal(&x
->props
.saddr
, saddr
, family
))
1208 x
= xfrm_state_alloc(net
);
1212 x
->sel
.daddr
.a4
= daddr
->a4
;
1213 x
->sel
.saddr
.a4
= saddr
->a4
;
1214 x
->sel
.prefixlen_d
= 32;
1215 x
->sel
.prefixlen_s
= 32;
1216 x
->props
.saddr
.a4
= saddr
->a4
;
1217 x
->id
.daddr
.a4
= daddr
->a4
;
1221 x
->sel
.daddr
.in6
= daddr
->in6
;
1222 x
->sel
.saddr
.in6
= saddr
->in6
;
1223 x
->sel
.prefixlen_d
= 128;
1224 x
->sel
.prefixlen_s
= 128;
1225 x
->props
.saddr
.in6
= saddr
->in6
;
1226 x
->id
.daddr
.in6
= daddr
->in6
;
1230 x
->km
.state
= XFRM_STATE_ACQ
;
1231 x
->id
.proto
= proto
;
1232 x
->props
.family
= family
;
1233 x
->props
.mode
= mode
;
1234 x
->props
.reqid
= reqid
;
1237 x
->lft
.hard_add_expires_seconds
= net
->xfrm
.sysctl_acq_expires
;
1239 tasklet_hrtimer_start(&x
->mtimer
, ktime_set(net
->xfrm
.sysctl_acq_expires
, 0), HRTIMER_MODE_REL
);
1240 list_add(&x
->km
.all
, &net
->xfrm
.state_all
);
1241 hlist_add_head_rcu(&x
->bydst
, net
->xfrm
.state_bydst
+ h
);
1242 h
= xfrm_src_hash(net
, daddr
, saddr
, family
);
1243 hlist_add_head_rcu(&x
->bysrc
, net
->xfrm
.state_bysrc
+ h
);
1245 net
->xfrm
.state_num
++;
1247 xfrm_hash_grow_check(net
, x
->bydst
.next
!= NULL
);
1253 static struct xfrm_state
*__xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1255 int xfrm_state_add(struct xfrm_state
*x
)
1257 struct net
*net
= xs_net(x
);
1258 struct xfrm_state
*x1
, *to_put
;
1261 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1262 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1264 family
= x
->props
.family
;
1268 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1270 x1
= __xfrm_state_locate(x
, use_spi
, family
);
1278 if (use_spi
&& x
->km
.seq
) {
1279 x1
= __xfrm_find_acq_byseq(net
, mark
, x
->km
.seq
);
1280 if (x1
&& ((x1
->id
.proto
!= x
->id
.proto
) ||
1281 !xfrm_addr_equal(&x1
->id
.daddr
, &x
->id
.daddr
, family
))) {
1288 x1
= __find_acq_core(net
, &x
->mark
, family
, x
->props
.mode
,
1289 x
->props
.reqid
, x
->id
.proto
,
1290 &x
->id
.daddr
, &x
->props
.saddr
, 0);
1292 __xfrm_state_bump_genids(x
);
1293 __xfrm_state_insert(x
);
1297 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1300 xfrm_state_delete(x1
);
1305 xfrm_state_put(to_put
);
1309 EXPORT_SYMBOL(xfrm_state_add
);
1311 #ifdef CONFIG_XFRM_MIGRATE
1312 static struct xfrm_state
*xfrm_state_clone(struct xfrm_state
*orig
,
1313 struct xfrm_encap_tmpl
*encap
)
1315 struct net
*net
= xs_net(orig
);
1316 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1320 memcpy(&x
->id
, &orig
->id
, sizeof(x
->id
));
1321 memcpy(&x
->sel
, &orig
->sel
, sizeof(x
->sel
));
1322 memcpy(&x
->lft
, &orig
->lft
, sizeof(x
->lft
));
1323 x
->props
.mode
= orig
->props
.mode
;
1324 x
->props
.replay_window
= orig
->props
.replay_window
;
1325 x
->props
.reqid
= orig
->props
.reqid
;
1326 x
->props
.family
= orig
->props
.family
;
1327 x
->props
.saddr
= orig
->props
.saddr
;
1330 x
->aalg
= xfrm_algo_auth_clone(orig
->aalg
);
1334 x
->props
.aalgo
= orig
->props
.aalgo
;
1337 x
->aead
= xfrm_algo_aead_clone(orig
->aead
);
1342 x
->ealg
= xfrm_algo_clone(orig
->ealg
);
1346 x
->props
.ealgo
= orig
->props
.ealgo
;
1349 x
->calg
= xfrm_algo_clone(orig
->calg
);
1353 x
->props
.calgo
= orig
->props
.calgo
;
1355 if (encap
|| orig
->encap
) {
1357 x
->encap
= kmemdup(encap
, sizeof(*x
->encap
),
1360 x
->encap
= kmemdup(orig
->encap
, sizeof(*x
->encap
),
1368 x
->coaddr
= kmemdup(orig
->coaddr
, sizeof(*x
->coaddr
),
1374 if (orig
->replay_esn
) {
1375 if (xfrm_replay_clone(x
, orig
))
1379 memcpy(&x
->mark
, &orig
->mark
, sizeof(x
->mark
));
1381 if (xfrm_init_state(x
) < 0)
1384 x
->props
.flags
= orig
->props
.flags
;
1385 x
->props
.extra_flags
= orig
->props
.extra_flags
;
1387 x
->tfcpad
= orig
->tfcpad
;
1388 x
->replay_maxdiff
= orig
->replay_maxdiff
;
1389 x
->replay_maxage
= orig
->replay_maxage
;
1390 x
->curlft
.add_time
= orig
->curlft
.add_time
;
1391 x
->km
.state
= orig
->km
.state
;
1392 x
->km
.seq
= orig
->km
.seq
;
1393 x
->replay
= orig
->replay
;
1394 x
->preplay
= orig
->preplay
;
1404 struct xfrm_state
*xfrm_migrate_state_find(struct xfrm_migrate
*m
, struct net
*net
)
1407 struct xfrm_state
*x
= NULL
;
1409 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1412 h
= xfrm_dst_hash(net
, &m
->old_daddr
, &m
->old_saddr
,
1413 m
->reqid
, m
->old_family
);
1414 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+h
, bydst
) {
1415 if (x
->props
.mode
!= m
->mode
||
1416 x
->id
.proto
!= m
->proto
)
1418 if (m
->reqid
&& x
->props
.reqid
!= m
->reqid
)
1420 if (!xfrm_addr_equal(&x
->id
.daddr
, &m
->old_daddr
,
1422 !xfrm_addr_equal(&x
->props
.saddr
, &m
->old_saddr
,
1429 h
= xfrm_src_hash(net
, &m
->old_daddr
, &m
->old_saddr
,
1431 hlist_for_each_entry(x
, net
->xfrm
.state_bysrc
+h
, bysrc
) {
1432 if (x
->props
.mode
!= m
->mode
||
1433 x
->id
.proto
!= m
->proto
)
1435 if (!xfrm_addr_equal(&x
->id
.daddr
, &m
->old_daddr
,
1437 !xfrm_addr_equal(&x
->props
.saddr
, &m
->old_saddr
,
1445 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1449 EXPORT_SYMBOL(xfrm_migrate_state_find
);
1451 struct xfrm_state
*xfrm_state_migrate(struct xfrm_state
*x
,
1452 struct xfrm_migrate
*m
,
1453 struct xfrm_encap_tmpl
*encap
)
1455 struct xfrm_state
*xc
;
1457 xc
= xfrm_state_clone(x
, encap
);
1461 memcpy(&xc
->id
.daddr
, &m
->new_daddr
, sizeof(xc
->id
.daddr
));
1462 memcpy(&xc
->props
.saddr
, &m
->new_saddr
, sizeof(xc
->props
.saddr
));
1465 if (xfrm_addr_equal(&x
->id
.daddr
, &m
->new_daddr
, m
->new_family
)) {
1466 /* a care is needed when the destination address of the
1467 state is to be updated as it is a part of triplet */
1468 xfrm_state_insert(xc
);
1470 if (xfrm_state_add(xc
) < 0)
1479 EXPORT_SYMBOL(xfrm_state_migrate
);
1482 int xfrm_state_update(struct xfrm_state
*x
)
1484 struct xfrm_state
*x1
, *to_put
;
1486 int use_spi
= xfrm_id_proto_match(x
->id
.proto
, IPSEC_PROTO_ANY
);
1487 struct net
*net
= xs_net(x
);
1491 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1492 x1
= __xfrm_state_locate(x
, use_spi
, x
->props
.family
);
1498 if (xfrm_state_kern(x1
)) {
1504 if (x1
->km
.state
== XFRM_STATE_ACQ
) {
1505 __xfrm_state_insert(x
);
1511 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1514 xfrm_state_put(to_put
);
1520 xfrm_state_delete(x1
);
1526 spin_lock_bh(&x1
->lock
);
1527 if (likely(x1
->km
.state
== XFRM_STATE_VALID
)) {
1528 if (x
->encap
&& x1
->encap
)
1529 memcpy(x1
->encap
, x
->encap
, sizeof(*x1
->encap
));
1530 if (x
->coaddr
&& x1
->coaddr
) {
1531 memcpy(x1
->coaddr
, x
->coaddr
, sizeof(*x1
->coaddr
));
1533 if (!use_spi
&& memcmp(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
)))
1534 memcpy(&x1
->sel
, &x
->sel
, sizeof(x1
->sel
));
1535 memcpy(&x1
->lft
, &x
->lft
, sizeof(x1
->lft
));
1538 tasklet_hrtimer_start(&x1
->mtimer
, ktime_set(1, 0), HRTIMER_MODE_REL
);
1539 if (x1
->curlft
.use_time
)
1540 xfrm_state_check_expire(x1
);
1543 x
->km
.state
= XFRM_STATE_DEAD
;
1544 __xfrm_state_put(x
);
1546 spin_unlock_bh(&x1
->lock
);
1552 EXPORT_SYMBOL(xfrm_state_update
);
1554 int xfrm_state_check_expire(struct xfrm_state
*x
)
1556 if (!x
->curlft
.use_time
)
1557 x
->curlft
.use_time
= get_seconds();
1559 if (x
->curlft
.bytes
>= x
->lft
.hard_byte_limit
||
1560 x
->curlft
.packets
>= x
->lft
.hard_packet_limit
) {
1561 x
->km
.state
= XFRM_STATE_EXPIRED
;
1562 tasklet_hrtimer_start(&x
->mtimer
, 0, HRTIMER_MODE_REL
);
1567 (x
->curlft
.bytes
>= x
->lft
.soft_byte_limit
||
1568 x
->curlft
.packets
>= x
->lft
.soft_packet_limit
)) {
1570 km_state_expired(x
, 0, 0);
1574 EXPORT_SYMBOL(xfrm_state_check_expire
);
1577 xfrm_state_lookup(struct net
*net
, u32 mark
, const xfrm_address_t
*daddr
, __be32 spi
,
1578 u8 proto
, unsigned short family
)
1580 struct xfrm_state
*x
;
1583 x
= __xfrm_state_lookup(net
, mark
, daddr
, spi
, proto
, family
);
1587 EXPORT_SYMBOL(xfrm_state_lookup
);
1590 xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1591 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1592 u8 proto
, unsigned short family
)
1594 struct xfrm_state
*x
;
1596 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1597 x
= __xfrm_state_lookup_byaddr(net
, mark
, daddr
, saddr
, proto
, family
);
1598 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1601 EXPORT_SYMBOL(xfrm_state_lookup_byaddr
);
1604 xfrm_find_acq(struct net
*net
, const struct xfrm_mark
*mark
, u8 mode
, u32 reqid
,
1605 u8 proto
, const xfrm_address_t
*daddr
,
1606 const xfrm_address_t
*saddr
, int create
, unsigned short family
)
1608 struct xfrm_state
*x
;
1610 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1611 x
= __find_acq_core(net
, mark
, family
, mode
, reqid
, proto
, daddr
, saddr
, create
);
1612 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1616 EXPORT_SYMBOL(xfrm_find_acq
);
1618 #ifdef CONFIG_XFRM_SUB_POLICY
1620 xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
,
1621 unsigned short family
, struct net
*net
)
1624 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
1626 return -EAFNOSUPPORT
;
1628 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
); /*FIXME*/
1629 if (afinfo
->tmpl_sort
)
1630 err
= afinfo
->tmpl_sort(dst
, src
, n
);
1631 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1635 EXPORT_SYMBOL(xfrm_tmpl_sort
);
1638 xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
,
1639 unsigned short family
)
1642 struct xfrm_state_afinfo
*afinfo
= xfrm_state_get_afinfo(family
);
1643 struct net
*net
= xs_net(*src
);
1646 return -EAFNOSUPPORT
;
1648 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1649 if (afinfo
->state_sort
)
1650 err
= afinfo
->state_sort(dst
, src
, n
);
1651 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1655 EXPORT_SYMBOL(xfrm_state_sort
);
1658 /* Silly enough, but I'm lazy to build resolution list */
1660 static struct xfrm_state
*__xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
)
1664 for (i
= 0; i
<= net
->xfrm
.state_hmask
; i
++) {
1665 struct xfrm_state
*x
;
1667 hlist_for_each_entry(x
, net
->xfrm
.state_bydst
+i
, bydst
) {
1668 if (x
->km
.seq
== seq
&&
1669 (mark
& x
->mark
.m
) == x
->mark
.v
&&
1670 x
->km
.state
== XFRM_STATE_ACQ
) {
1679 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
)
1681 struct xfrm_state
*x
;
1683 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1684 x
= __xfrm_find_acq_byseq(net
, mark
, seq
);
1685 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1688 EXPORT_SYMBOL(xfrm_find_acq_byseq
);
1690 u32
xfrm_get_acqseq(void)
1693 static atomic_t acqseq
;
1696 res
= atomic_inc_return(&acqseq
);
1701 EXPORT_SYMBOL(xfrm_get_acqseq
);
1703 int verify_spi_info(u8 proto
, u32 min
, u32 max
)
1711 /* IPCOMP spi is 16-bits. */
1725 EXPORT_SYMBOL(verify_spi_info
);
1727 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 low
, u32 high
)
1729 struct net
*net
= xs_net(x
);
1731 struct xfrm_state
*x0
;
1733 __be32 minspi
= htonl(low
);
1734 __be32 maxspi
= htonl(high
);
1735 u32 mark
= x
->mark
.v
& x
->mark
.m
;
1737 spin_lock_bh(&x
->lock
);
1738 if (x
->km
.state
== XFRM_STATE_DEAD
)
1747 if (minspi
== maxspi
) {
1748 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, minspi
, x
->id
.proto
, x
->props
.family
);
1756 for (h
= 0; h
< high
-low
+1; h
++) {
1757 spi
= low
+ prandom_u32()%(high
-low
+1);
1758 x0
= xfrm_state_lookup(net
, mark
, &x
->id
.daddr
, htonl(spi
), x
->id
.proto
, x
->props
.family
);
1760 x
->id
.spi
= htonl(spi
);
1767 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1768 h
= xfrm_spi_hash(net
, &x
->id
.daddr
, x
->id
.spi
, x
->id
.proto
, x
->props
.family
);
1769 hlist_add_head_rcu(&x
->byspi
, net
->xfrm
.state_byspi
+ h
);
1770 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1776 spin_unlock_bh(&x
->lock
);
1780 EXPORT_SYMBOL(xfrm_alloc_spi
);
1782 static bool __xfrm_state_filter_match(struct xfrm_state
*x
,
1783 struct xfrm_address_filter
*filter
)
1786 if ((filter
->family
== AF_INET
||
1787 filter
->family
== AF_INET6
) &&
1788 x
->props
.family
!= filter
->family
)
1791 return addr_match(&x
->props
.saddr
, &filter
->saddr
,
1793 addr_match(&x
->id
.daddr
, &filter
->daddr
,
1799 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1800 int (*func
)(struct xfrm_state
*, int, void*),
1803 struct xfrm_state
*state
;
1804 struct xfrm_state_walk
*x
;
1807 if (walk
->seq
!= 0 && list_empty(&walk
->all
))
1810 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1811 if (list_empty(&walk
->all
))
1812 x
= list_first_entry(&net
->xfrm
.state_all
, struct xfrm_state_walk
, all
);
1814 x
= list_first_entry(&walk
->all
, struct xfrm_state_walk
, all
);
1815 list_for_each_entry_from(x
, &net
->xfrm
.state_all
, all
) {
1816 if (x
->state
== XFRM_STATE_DEAD
)
1818 state
= container_of(x
, struct xfrm_state
, km
);
1819 if (!xfrm_id_proto_match(state
->id
.proto
, walk
->proto
))
1821 if (!__xfrm_state_filter_match(state
, walk
->filter
))
1823 err
= func(state
, walk
->seq
, data
);
1825 list_move_tail(&walk
->all
, &x
->all
);
1830 if (walk
->seq
== 0) {
1834 list_del_init(&walk
->all
);
1836 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1839 EXPORT_SYMBOL(xfrm_state_walk
);
1841 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
,
1842 struct xfrm_address_filter
*filter
)
1844 INIT_LIST_HEAD(&walk
->all
);
1845 walk
->proto
= proto
;
1846 walk
->state
= XFRM_STATE_DEAD
;
1848 walk
->filter
= filter
;
1850 EXPORT_SYMBOL(xfrm_state_walk_init
);
1852 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
, struct net
*net
)
1854 kfree(walk
->filter
);
1856 if (list_empty(&walk
->all
))
1859 spin_lock_bh(&net
->xfrm
.xfrm_state_lock
);
1860 list_del(&walk
->all
);
1861 spin_unlock_bh(&net
->xfrm
.xfrm_state_lock
);
1863 EXPORT_SYMBOL(xfrm_state_walk_done
);
1865 static void xfrm_replay_timer_handler(unsigned long data
)
1867 struct xfrm_state
*x
= (struct xfrm_state
*)data
;
1869 spin_lock(&x
->lock
);
1871 if (x
->km
.state
== XFRM_STATE_VALID
) {
1872 if (xfrm_aevent_is_on(xs_net(x
)))
1873 x
->repl
->notify(x
, XFRM_REPLAY_TIMEOUT
);
1875 x
->xflags
|= XFRM_TIME_DEFER
;
1878 spin_unlock(&x
->lock
);
1881 static LIST_HEAD(xfrm_km_list
);
1883 void km_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
1885 struct xfrm_mgr
*km
;
1888 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
)
1889 if (km
->notify_policy
)
1890 km
->notify_policy(xp
, dir
, c
);
1894 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
1896 struct xfrm_mgr
*km
;
1898 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
)
1904 EXPORT_SYMBOL(km_policy_notify
);
1905 EXPORT_SYMBOL(km_state_notify
);
1907 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
)
1913 c
.event
= XFRM_MSG_EXPIRE
;
1914 km_state_notify(x
, &c
);
1917 EXPORT_SYMBOL(km_state_expired
);
1919 * We send to all registered managers regardless of failure
1920 * We are happy with one success
1922 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
)
1924 int err
= -EINVAL
, acqret
;
1925 struct xfrm_mgr
*km
;
1928 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1929 acqret
= km
->acquire(x
, t
, pol
);
1936 EXPORT_SYMBOL(km_query
);
1938 int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
)
1941 struct xfrm_mgr
*km
;
1944 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1945 if (km
->new_mapping
)
1946 err
= km
->new_mapping(x
, ipaddr
, sport
);
1953 EXPORT_SYMBOL(km_new_mapping
);
1955 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 portid
)
1961 c
.event
= XFRM_MSG_POLEXPIRE
;
1962 km_policy_notify(pol
, dir
, &c
);
1964 EXPORT_SYMBOL(km_policy_expired
);
1966 #ifdef CONFIG_XFRM_MIGRATE
1967 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1968 const struct xfrm_migrate
*m
, int num_migrate
,
1969 const struct xfrm_kmaddress
*k
,
1970 const struct xfrm_encap_tmpl
*encap
)
1974 struct xfrm_mgr
*km
;
1977 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
1979 ret
= km
->migrate(sel
, dir
, type
, m
, num_migrate
, k
,
1988 EXPORT_SYMBOL(km_migrate
);
1991 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
1995 struct xfrm_mgr
*km
;
1998 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
2000 ret
= km
->report(net
, proto
, sel
, addr
);
2008 EXPORT_SYMBOL(km_report
);
2010 bool km_is_alive(const struct km_event
*c
)
2012 struct xfrm_mgr
*km
;
2013 bool is_alive
= false;
2016 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
2017 if (km
->is_alive
&& km
->is_alive(c
)) {
2026 EXPORT_SYMBOL(km_is_alive
);
2028 int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
2032 struct xfrm_mgr
*km
;
2033 struct xfrm_policy
*pol
= NULL
;
2035 if (optlen
<= 0 || optlen
> PAGE_SIZE
)
2038 data
= memdup_user(optval
, optlen
);
2040 return PTR_ERR(data
);
2044 list_for_each_entry_rcu(km
, &xfrm_km_list
, list
) {
2045 pol
= km
->compile_policy(sk
, optname
, data
,
2053 xfrm_sk_policy_insert(sk
, err
, pol
);
2061 EXPORT_SYMBOL(xfrm_user_policy
);
2063 static DEFINE_SPINLOCK(xfrm_km_lock
);
2065 int xfrm_register_km(struct xfrm_mgr
*km
)
2067 spin_lock_bh(&xfrm_km_lock
);
2068 list_add_tail_rcu(&km
->list
, &xfrm_km_list
);
2069 spin_unlock_bh(&xfrm_km_lock
);
2072 EXPORT_SYMBOL(xfrm_register_km
);
2074 int xfrm_unregister_km(struct xfrm_mgr
*km
)
2076 spin_lock_bh(&xfrm_km_lock
);
2077 list_del_rcu(&km
->list
);
2078 spin_unlock_bh(&xfrm_km_lock
);
2082 EXPORT_SYMBOL(xfrm_unregister_km
);
2084 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
)
2088 if (WARN_ON(afinfo
->family
>= NPROTO
))
2089 return -EAFNOSUPPORT
;
2091 spin_lock_bh(&xfrm_state_afinfo_lock
);
2092 if (unlikely(xfrm_state_afinfo
[afinfo
->family
] != NULL
))
2095 rcu_assign_pointer(xfrm_state_afinfo
[afinfo
->family
], afinfo
);
2096 spin_unlock_bh(&xfrm_state_afinfo_lock
);
2099 EXPORT_SYMBOL(xfrm_state_register_afinfo
);
2101 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
)
2103 int err
= 0, family
= afinfo
->family
;
2105 if (WARN_ON(family
>= NPROTO
))
2106 return -EAFNOSUPPORT
;
2108 spin_lock_bh(&xfrm_state_afinfo_lock
);
2109 if (likely(xfrm_state_afinfo
[afinfo
->family
] != NULL
)) {
2110 if (rcu_access_pointer(xfrm_state_afinfo
[family
]) != afinfo
)
2113 RCU_INIT_POINTER(xfrm_state_afinfo
[afinfo
->family
], NULL
);
2115 spin_unlock_bh(&xfrm_state_afinfo_lock
);
2119 EXPORT_SYMBOL(xfrm_state_unregister_afinfo
);
2121 struct xfrm_state_afinfo
*xfrm_state_afinfo_get_rcu(unsigned int family
)
2123 if (unlikely(family
>= NPROTO
))
2126 return rcu_dereference(xfrm_state_afinfo
[family
]);
2129 struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
)
2131 struct xfrm_state_afinfo
*afinfo
;
2132 if (unlikely(family
>= NPROTO
))
2135 afinfo
= rcu_dereference(xfrm_state_afinfo
[family
]);
2136 if (unlikely(!afinfo
))
2141 /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
2142 void xfrm_state_delete_tunnel(struct xfrm_state
*x
)
2145 struct xfrm_state
*t
= x
->tunnel
;
2147 if (atomic_read(&t
->tunnel_users
) == 2)
2148 xfrm_state_delete(t
);
2149 atomic_dec(&t
->tunnel_users
);
2154 EXPORT_SYMBOL(xfrm_state_delete_tunnel
);
2156 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
)
2158 const struct xfrm_type
*type
= READ_ONCE(x
->type
);
2160 if (x
->km
.state
== XFRM_STATE_VALID
&&
2161 type
&& type
->get_mtu
)
2162 return type
->get_mtu(x
, mtu
);
2164 return mtu
- x
->props
.header_len
;
2167 int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
)
2169 struct xfrm_state_afinfo
*afinfo
;
2170 struct xfrm_mode
*inner_mode
;
2171 int family
= x
->props
.family
;
2174 err
= -EAFNOSUPPORT
;
2175 afinfo
= xfrm_state_get_afinfo(family
);
2180 if (afinfo
->init_flags
)
2181 err
= afinfo
->init_flags(x
);
2188 err
= -EPROTONOSUPPORT
;
2190 if (x
->sel
.family
!= AF_UNSPEC
) {
2191 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->sel
.family
);
2192 if (inner_mode
== NULL
)
2195 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
) &&
2196 family
!= x
->sel
.family
) {
2197 xfrm_put_mode(inner_mode
);
2201 x
->inner_mode
= inner_mode
;
2203 struct xfrm_mode
*inner_mode_iaf
;
2204 int iafamily
= AF_INET
;
2206 inner_mode
= xfrm_get_mode(x
->props
.mode
, x
->props
.family
);
2207 if (inner_mode
== NULL
)
2210 if (!(inner_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
)) {
2211 xfrm_put_mode(inner_mode
);
2214 x
->inner_mode
= inner_mode
;
2216 if (x
->props
.family
== AF_INET
)
2217 iafamily
= AF_INET6
;
2219 inner_mode_iaf
= xfrm_get_mode(x
->props
.mode
, iafamily
);
2220 if (inner_mode_iaf
) {
2221 if (inner_mode_iaf
->flags
& XFRM_MODE_FLAG_TUNNEL
)
2222 x
->inner_mode_iaf
= inner_mode_iaf
;
2224 xfrm_put_mode(inner_mode_iaf
);
2228 x
->type
= xfrm_get_type(x
->id
.proto
, family
);
2229 if (x
->type
== NULL
)
2232 x
->type_offload
= xfrm_get_type_offload(x
->id
.proto
, family
);
2234 err
= x
->type
->init_state(x
);
2238 x
->outer_mode
= xfrm_get_mode(x
->props
.mode
, family
);
2239 if (x
->outer_mode
== NULL
) {
2240 err
= -EPROTONOSUPPORT
;
2245 err
= xfrm_init_replay(x
);
2250 x
->km
.state
= XFRM_STATE_VALID
;
2256 EXPORT_SYMBOL(__xfrm_init_state
);
2258 int xfrm_init_state(struct xfrm_state
*x
)
2260 return __xfrm_init_state(x
, true);
2263 EXPORT_SYMBOL(xfrm_init_state
);
2265 int __net_init
xfrm_state_init(struct net
*net
)
2269 INIT_LIST_HEAD(&net
->xfrm
.state_all
);
2271 sz
= sizeof(struct hlist_head
) * 8;
2273 net
->xfrm
.state_bydst
= xfrm_hash_alloc(sz
);
2274 if (!net
->xfrm
.state_bydst
)
2276 net
->xfrm
.state_bysrc
= xfrm_hash_alloc(sz
);
2277 if (!net
->xfrm
.state_bysrc
)
2279 net
->xfrm
.state_byspi
= xfrm_hash_alloc(sz
);
2280 if (!net
->xfrm
.state_byspi
)
2282 net
->xfrm
.state_hmask
= ((sz
/ sizeof(struct hlist_head
)) - 1);
2284 net
->xfrm
.state_num
= 0;
2285 INIT_WORK(&net
->xfrm
.state_hash_work
, xfrm_hash_resize
);
2286 spin_lock_init(&net
->xfrm
.xfrm_state_lock
);
2290 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2292 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2297 void xfrm_state_fini(struct net
*net
)
2301 flush_work(&net
->xfrm
.state_hash_work
);
2302 xfrm_state_flush(net
, IPSEC_PROTO_ANY
, false);
2303 flush_work(&xfrm_state_gc_work
);
2305 WARN_ON(!list_empty(&net
->xfrm
.state_all
));
2307 sz
= (net
->xfrm
.state_hmask
+ 1) * sizeof(struct hlist_head
);
2308 WARN_ON(!hlist_empty(net
->xfrm
.state_byspi
));
2309 xfrm_hash_free(net
->xfrm
.state_byspi
, sz
);
2310 WARN_ON(!hlist_empty(net
->xfrm
.state_bysrc
));
2311 xfrm_hash_free(net
->xfrm
.state_bysrc
, sz
);
2312 WARN_ON(!hlist_empty(net
->xfrm
.state_bydst
));
2313 xfrm_hash_free(net
->xfrm
.state_bydst
, sz
);
2316 #ifdef CONFIG_AUDITSYSCALL
2317 static void xfrm_audit_helper_sainfo(struct xfrm_state
*x
,
2318 struct audit_buffer
*audit_buf
)
2320 struct xfrm_sec_ctx
*ctx
= x
->security
;
2321 u32 spi
= ntohl(x
->id
.spi
);
2324 audit_log_format(audit_buf
, " sec_alg=%u sec_doi=%u sec_obj=%s",
2325 ctx
->ctx_alg
, ctx
->ctx_doi
, ctx
->ctx_str
);
2327 switch (x
->props
.family
) {
2329 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2330 &x
->props
.saddr
.a4
, &x
->id
.daddr
.a4
);
2333 audit_log_format(audit_buf
, " src=%pI6 dst=%pI6",
2334 x
->props
.saddr
.a6
, x
->id
.daddr
.a6
);
2338 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2341 static void xfrm_audit_helper_pktinfo(struct sk_buff
*skb
, u16 family
,
2342 struct audit_buffer
*audit_buf
)
2344 const struct iphdr
*iph4
;
2345 const struct ipv6hdr
*iph6
;
2350 audit_log_format(audit_buf
, " src=%pI4 dst=%pI4",
2351 &iph4
->saddr
, &iph4
->daddr
);
2354 iph6
= ipv6_hdr(skb
);
2355 audit_log_format(audit_buf
,
2356 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
2357 &iph6
->saddr
, &iph6
->daddr
,
2358 iph6
->flow_lbl
[0] & 0x0f,
2365 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
, bool task_valid
)
2367 struct audit_buffer
*audit_buf
;
2369 audit_buf
= xfrm_audit_start("SAD-add");
2370 if (audit_buf
== NULL
)
2372 xfrm_audit_helper_usrinfo(task_valid
, audit_buf
);
2373 xfrm_audit_helper_sainfo(x
, audit_buf
);
2374 audit_log_format(audit_buf
, " res=%u", result
);
2375 audit_log_end(audit_buf
);
2377 EXPORT_SYMBOL_GPL(xfrm_audit_state_add
);
2379 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
, bool task_valid
)
2381 struct audit_buffer
*audit_buf
;
2383 audit_buf
= xfrm_audit_start("SAD-delete");
2384 if (audit_buf
== NULL
)
2386 xfrm_audit_helper_usrinfo(task_valid
, audit_buf
);
2387 xfrm_audit_helper_sainfo(x
, audit_buf
);
2388 audit_log_format(audit_buf
, " res=%u", result
);
2389 audit_log_end(audit_buf
);
2391 EXPORT_SYMBOL_GPL(xfrm_audit_state_delete
);
2393 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
2394 struct sk_buff
*skb
)
2396 struct audit_buffer
*audit_buf
;
2399 audit_buf
= xfrm_audit_start("SA-replay-overflow");
2400 if (audit_buf
== NULL
)
2402 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2403 /* don't record the sequence number because it's inherent in this kind
2404 * of audit message */
2405 spi
= ntohl(x
->id
.spi
);
2406 audit_log_format(audit_buf
, " spi=%u(0x%x)", spi
, spi
);
2407 audit_log_end(audit_buf
);
2409 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow
);
2411 void xfrm_audit_state_replay(struct xfrm_state
*x
,
2412 struct sk_buff
*skb
, __be32 net_seq
)
2414 struct audit_buffer
*audit_buf
;
2417 audit_buf
= xfrm_audit_start("SA-replayed-pkt");
2418 if (audit_buf
== NULL
)
2420 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2421 spi
= ntohl(x
->id
.spi
);
2422 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2423 spi
, spi
, ntohl(net_seq
));
2424 audit_log_end(audit_buf
);
2426 EXPORT_SYMBOL_GPL(xfrm_audit_state_replay
);
2428 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
)
2430 struct audit_buffer
*audit_buf
;
2432 audit_buf
= xfrm_audit_start("SA-notfound");
2433 if (audit_buf
== NULL
)
2435 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2436 audit_log_end(audit_buf
);
2438 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple
);
2440 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
2441 __be32 net_spi
, __be32 net_seq
)
2443 struct audit_buffer
*audit_buf
;
2446 audit_buf
= xfrm_audit_start("SA-notfound");
2447 if (audit_buf
== NULL
)
2449 xfrm_audit_helper_pktinfo(skb
, family
, audit_buf
);
2450 spi
= ntohl(net_spi
);
2451 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2452 spi
, spi
, ntohl(net_seq
));
2453 audit_log_end(audit_buf
);
2455 EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound
);
2457 void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
2458 struct sk_buff
*skb
, u8 proto
)
2460 struct audit_buffer
*audit_buf
;
2464 audit_buf
= xfrm_audit_start("SA-icv-failure");
2465 if (audit_buf
== NULL
)
2467 xfrm_audit_helper_pktinfo(skb
, x
->props
.family
, audit_buf
);
2468 if (xfrm_parse_spi(skb
, proto
, &net_spi
, &net_seq
) == 0) {
2469 u32 spi
= ntohl(net_spi
);
2470 audit_log_format(audit_buf
, " spi=%u(0x%x) seqno=%u",
2471 spi
, spi
, ntohl(net_seq
));
2473 audit_log_end(audit_buf
);
2475 EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail
);
2476 #endif /* CONFIG_AUDITSYSCALL */