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xfrm: avoid spinlock in get_acqseq() used by xfrm user
[net-next-2.6.git] / net / xfrm / xfrm_state.c
CommitLineData
1da177e4
LT		 1/*
2 * xfrm_state.c
3 *
4 * Changes:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
df71837d 13 *
1da177e4
LT		 14 */
15
16#include <linux/workqueue.h>
17#include <net/xfrm.h>
18#include <linux/pfkeyv2.h>
19#include <linux/ipsec.h>
20#include <linux/module.h>
f034b5d4 21#include <linux/cache.h>
68277acc 22#include <linux/audit.h>
b5890d8b 23#include <asm/uaccess.h>
9e0d57fd
YP		 24#include <linux/ktime.h>
25#include <linux/interrupt.h>
26#include <linux/kernel.h>
1da177e4 27
44e36b42
DM		 28#include "xfrm_hash.h"
29
1da177e4
LT		 30/* Each xfrm_state may be linked to two tables:
31
32 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 33 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 34 destination/tunnel endpoint. (output)
35 */
36
37static DEFINE_SPINLOCK(xfrm_state_lock);
38
f034b5d4 39static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
9d4a706d 40static unsigned int xfrm_state_genid;
f034b5d4 41
17c2a42a
HX		 42static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
43static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
44
afeb14b4
PM		 45#ifdef CONFIG_AUDITSYSCALL
46static void xfrm_audit_state_replay(struct xfrm_state *x,
47 struct sk_buff *skb, __be32 net_seq);
48#else
49#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
50#endif /* CONFIG_AUDITSYSCALL */
51
64d0cd00
AD		 52static inline unsigned int xfrm_dst_hash(struct net *net,
53 xfrm_address_t *daddr,
c1969f29
DM		 54 xfrm_address_t *saddr,
55 u32 reqid,
a624c108 56 unsigned short family)
f034b5d4 57{
64d0cd00 58 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 59}
60
64d0cd00
AD		 61static inline unsigned int xfrm_src_hash(struct net *net,
62 xfrm_address_t *daddr,
667bbcb6 63 xfrm_address_t *saddr,
44e36b42 64 unsigned short family)
f034b5d4 65{
64d0cd00 66 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 67}
68
f034b5d4 69static inline unsigned int
64d0cd00 70xfrm_spi_hash(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
f034b5d4 71{
64d0cd00 72 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 73}
74
f034b5d4
DM		 75static void xfrm_hash_transfer(struct hlist_head *list,
76 struct hlist_head *ndsttable,
77 struct hlist_head *nsrctable,
78 struct hlist_head *nspitable,
79 unsigned int nhashmask)
80{
81 struct hlist_node *entry, *tmp;
82 struct xfrm_state *x;
83
84 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
85 unsigned int h;
86
c1969f29
DM		 87 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
88 x->props.reqid, x->props.family,
89 nhashmask);
f034b5d4
DM		 90 hlist_add_head(&x->bydst, ndsttable+h);
91
667bbcb6
MN		 92 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
93 x->props.family,
f034b5d4
DM		 94 nhashmask);
95 hlist_add_head(&x->bysrc, nsrctable+h);
96
7b4dc360
MN		 97 if (x->id.spi) {
98 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
99 x->id.proto, x->props.family,
100 nhashmask);
101 hlist_add_head(&x->byspi, nspitable+h);
102 }
f034b5d4
DM		 103 }
104}
105
63082733 106static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 107{
63082733 108 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 109}
110
111static DEFINE_MUTEX(hash_resize_mutex);
112
63082733 113static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 114{
63082733 115 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 116 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
117 unsigned long nsize, osize;
118 unsigned int nhashmask, ohashmask;
119 int i;
120
121 mutex_lock(&hash_resize_mutex);
122
63082733 123 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 124 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 125 if (!ndst)
126 goto out_unlock;
44e36b42 127 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 128 if (!nsrc) {
44e36b42 129 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 130 goto out_unlock;
131 }
44e36b42 132 nspi = xfrm_hash_alloc(nsize);
f034b5d4 133 if (!nspi) {
44e36b42
DM		 134 xfrm_hash_free(ndst, nsize);
135 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 136 goto out_unlock;
137 }
138
139 spin_lock_bh(&xfrm_state_lock);
140
141 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 142 for (i = net->xfrm.state_hmask; i >= 0; i--)
143 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 144 nhashmask);
145
63082733
AD		 146 odst = net->xfrm.state_bydst;
147 osrc = net->xfrm.state_bysrc;
148 ospi = net->xfrm.state_byspi;
149 ohashmask = net->xfrm.state_hmask;
f034b5d4 150
63082733
AD		 151 net->xfrm.state_bydst = ndst;
152 net->xfrm.state_bysrc = nsrc;
153 net->xfrm.state_byspi = nspi;
154 net->xfrm.state_hmask = nhashmask;
f034b5d4
DM		 155
156 spin_unlock_bh(&xfrm_state_lock);
157
158 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 159 xfrm_hash_free(odst, osize);
160 xfrm_hash_free(osrc, osize);
161 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 162
163out_unlock:
164 mutex_unlock(&hash_resize_mutex);
165}
166
1da177e4
LT		 167static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
168static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
169
1da177e4
LT		 170static DEFINE_SPINLOCK(xfrm_state_gc_lock);
171
53bc6b4d 172int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 173
980ebd25 174int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
53bc6b4d 175void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
1da177e4 176
aa5d62cc
HX		 177static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
178{
179 struct xfrm_state_afinfo *afinfo;
180 if (unlikely(family >= NPROTO))
181 return NULL;
182 write_lock_bh(&xfrm_state_afinfo_lock);
183 afinfo = xfrm_state_afinfo[family];
184 if (unlikely(!afinfo))
185 write_unlock_bh(&xfrm_state_afinfo_lock);
186 return afinfo;
187}
188
189static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 190 __releases(xfrm_state_afinfo_lock)
aa5d62cc
HX		 191{
192 write_unlock_bh(&xfrm_state_afinfo_lock);
193}
194
533cb5b0 195int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 196{
197 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 198 const struct xfrm_type **typemap;
aa5d62cc
HX		 199 int err = 0;
200
201 if (unlikely(afinfo == NULL))
202 return -EAFNOSUPPORT;
203 typemap = afinfo->type_map;
204
205 if (likely(typemap[type->proto] == NULL))
206 typemap[type->proto] = type;
207 else
208 err = -EEXIST;
209 xfrm_state_unlock_afinfo(afinfo);
210 return err;
211}
212EXPORT_SYMBOL(xfrm_register_type);
213
533cb5b0 214int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 215{
216 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 217 const struct xfrm_type **typemap;
aa5d62cc
HX		 218 int err = 0;
219
220 if (unlikely(afinfo == NULL))
221 return -EAFNOSUPPORT;
222 typemap = afinfo->type_map;
223
224 if (unlikely(typemap[type->proto] != type))
225 err = -ENOENT;
226 else
227 typemap[type->proto] = NULL;
228 xfrm_state_unlock_afinfo(afinfo);
229 return err;
230}
231EXPORT_SYMBOL(xfrm_unregister_type);
232
533cb5b0 233static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 234{
235 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 236 const struct xfrm_type **typemap;
237 const struct xfrm_type *type;
aa5d62cc
HX		 238 int modload_attempted = 0;
239
240retry:
241 afinfo = xfrm_state_get_afinfo(family);
242 if (unlikely(afinfo == NULL))
243 return NULL;
244 typemap = afinfo->type_map;
245
246 type = typemap[proto];
247 if (unlikely(type && !try_module_get(type->owner)))
248 type = NULL;
249 if (!type && !modload_attempted) {
250 xfrm_state_put_afinfo(afinfo);
251 request_module("xfrm-type-%d-%d", family, proto);
252 modload_attempted = 1;
253 goto retry;
254 }
255
256 xfrm_state_put_afinfo(afinfo);
257 return type;
258}
259
533cb5b0 260static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 261{
262 module_put(type->owner);
263}
264
265int xfrm_register_mode(struct xfrm_mode *mode, int family)
266{
267 struct xfrm_state_afinfo *afinfo;
268 struct xfrm_mode **modemap;
269 int err;
270
271 if (unlikely(mode->encap >= XFRM_MODE_MAX))
272 return -EINVAL;
273
274 afinfo = xfrm_state_lock_afinfo(family);
275 if (unlikely(afinfo == NULL))
276 return -EAFNOSUPPORT;
277
278 err = -EEXIST;
279 modemap = afinfo->mode_map;
17c2a42a
HX		 280 if (modemap[mode->encap])
281 goto out;
aa5d62cc 282
17c2a42a
HX		 283 err = -ENOENT;
284 if (!try_module_get(afinfo->owner))
285 goto out;
286
287 mode->afinfo = afinfo;
288 modemap[mode->encap] = mode;
289 err = 0;
290
291out:
aa5d62cc
HX		 292 xfrm_state_unlock_afinfo(afinfo);
293 return err;
294}
295EXPORT_SYMBOL(xfrm_register_mode);
296
297int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
298{
299 struct xfrm_state_afinfo *afinfo;
300 struct xfrm_mode **modemap;
301 int err;
302
303 if (unlikely(mode->encap >= XFRM_MODE_MAX))
304 return -EINVAL;
305
306 afinfo = xfrm_state_lock_afinfo(family);
307 if (unlikely(afinfo == NULL))
308 return -EAFNOSUPPORT;
309
310 err = -ENOENT;
311 modemap = afinfo->mode_map;
312 if (likely(modemap[mode->encap] == mode)) {
313 modemap[mode->encap] = NULL;
17c2a42a 314 module_put(mode->afinfo->owner);
aa5d62cc
HX		 315 err = 0;
316 }
317
318 xfrm_state_unlock_afinfo(afinfo);
319 return err;
320}
321EXPORT_SYMBOL(xfrm_unregister_mode);
322
323static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
324{
325 struct xfrm_state_afinfo *afinfo;
326 struct xfrm_mode *mode;
327 int modload_attempted = 0;
328
329 if (unlikely(encap >= XFRM_MODE_MAX))
330 return NULL;
331
332retry:
333 afinfo = xfrm_state_get_afinfo(family);
334 if (unlikely(afinfo == NULL))
335 return NULL;
336
337 mode = afinfo->mode_map[encap];
338 if (unlikely(mode && !try_module_get(mode->owner)))
339 mode = NULL;
340 if (!mode && !modload_attempted) {
341 xfrm_state_put_afinfo(afinfo);
342 request_module("xfrm-mode-%d-%d", family, encap);
343 modload_attempted = 1;
344 goto retry;
345 }
346
347 xfrm_state_put_afinfo(afinfo);
348 return mode;
349}
350
351static void xfrm_put_mode(struct xfrm_mode *mode)
352{
353 module_put(mode->owner);
354}
355
1da177e4
LT		 356static void xfrm_state_gc_destroy(struct xfrm_state *x)
357{
9e0d57fd 358 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 359 del_timer_sync(&x->rtimer);
a51482bd
JJ		 360 kfree(x->aalg);
361 kfree(x->ealg);
362 kfree(x->calg);
363 kfree(x->encap);
060f02a3 364 kfree(x->coaddr);
13996378
HX		 365 if (x->inner_mode)
366 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 367 if (x->inner_mode_iaf)
368 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 369 if (x->outer_mode)
370 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 371 if (x->type) {
372 x->type->destructor(x);
373 xfrm_put_type(x->type);
374 }
df71837d 375 security_xfrm_state_free(x);
1da177e4
LT		 376 kfree(x);
377}
378
c7837144 379static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 380{
c7837144 381 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7
HX		 382 struct xfrm_state *x;
383 struct hlist_node *entry, *tmp;
384 struct hlist_head gc_list;
1da177e4 385
1da177e4 386 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 387 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 388 spin_unlock_bh(&xfrm_state_gc_lock);
389
12a169e7 390 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
1da177e4 391 xfrm_state_gc_destroy(x);
8f126e37 392
50a30657 393 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 394}
395
396static inline unsigned long make_jiffies(long secs)
397{
398 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
399 return MAX_SCHEDULE_TIMEOUT-1;
400 else
a716c119 401 return secs*HZ;
1da177e4
LT		 402}
403
9e0d57fd 404static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
1da177e4 405{
9e0d57fd
YP		 406 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
407 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
98806f75 408 struct net *net = xs_net(x);
9d729f72 409 unsigned long now = get_seconds();
1da177e4
LT		 410 long next = LONG_MAX;
411 int warn = 0;
161a09e7 412 int err = 0;
1da177e4
LT		 413
414 spin_lock(&x->lock);
415 if (x->km.state == XFRM_STATE_DEAD)
416 goto out;
417 if (x->km.state == XFRM_STATE_EXPIRED)
418 goto expired;
419 if (x->lft.hard_add_expires_seconds) {
420 long tmo = x->lft.hard_add_expires_seconds +
421 x->curlft.add_time - now;
422 if (tmo <= 0)
423 goto expired;
424 if (tmo < next)
425 next = tmo;
426 }
427 if (x->lft.hard_use_expires_seconds) {
428 long tmo = x->lft.hard_use_expires_seconds +
429 (x->curlft.use_time ? : now) - now;
430 if (tmo <= 0)
431 goto expired;
432 if (tmo < next)
433 next = tmo;
434 }
435 if (x->km.dying)
436 goto resched;
437 if (x->lft.soft_add_expires_seconds) {
438 long tmo = x->lft.soft_add_expires_seconds +
439 x->curlft.add_time - now;
440 if (tmo <= 0)
441 warn = 1;
442 else if (tmo < next)
443 next = tmo;
444 }
445 if (x->lft.soft_use_expires_seconds) {
446 long tmo = x->lft.soft_use_expires_seconds +
447 (x->curlft.use_time ? : now) - now;
448 if (tmo <= 0)
449 warn = 1;
450 else if (tmo < next)
451 next = tmo;
452 }
453
4666faab 454 x->km.dying = warn;
1da177e4 455 if (warn)
53bc6b4d 456 km_state_expired(x, 0, 0);
1da177e4 457resched:
9e0d57fd
YP		 458 if (next != LONG_MAX){
459 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
460 }
a47f0ce0 461
1da177e4
LT		 462 goto out;
463
464expired:
465 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
466 x->km.state = XFRM_STATE_EXPIRED;
98806f75 467 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 468 next = 2;
469 goto resched;
470 }
161a09e7
JL		 471
472 err = __xfrm_state_delete(x);
473 if (!err && x->id.spi)
53bc6b4d 474 km_state_expired(x, 1, 0);
1da177e4 475
ab5f5e8b 476 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 477 audit_get_loginuid(current),
478 audit_get_sessionid(current), 0);
161a09e7 479
1da177e4
LT		 480out:
481 spin_unlock(&x->lock);
9e0d57fd 482 return HRTIMER_NORESTART;
1da177e4
LT		 483}
484
0ac84752
DM		 485static void xfrm_replay_timer_handler(unsigned long data);
486
673c09be 487struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 488{
489 struct xfrm_state *x;
490
0da974f4 491 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 492
493 if (x) {
673c09be 494 write_pnet(&x->xs_net, net);
1da177e4
LT		 495 atomic_set(&x->refcnt, 1);
496 atomic_set(&x->tunnel_users, 0);
12a169e7 497 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 498 INIT_HLIST_NODE(&x->bydst);
499 INIT_HLIST_NODE(&x->bysrc);
500 INIT_HLIST_NODE(&x->byspi);
9e0d57fd 501 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 502 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
503 (unsigned long)x);
9d729f72 504 x->curlft.add_time = get_seconds();
1da177e4
LT		 505 x->lft.soft_byte_limit = XFRM_INF;
506 x->lft.soft_packet_limit = XFRM_INF;
507 x->lft.hard_byte_limit = XFRM_INF;
508 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 509 x->replay_maxage = 0;
510 x->replay_maxdiff = 0;
df9dcb45
KM		 511 x->inner_mode = NULL;
512 x->inner_mode_iaf = NULL;
1da177e4
LT		 513 spin_lock_init(&x->lock);
514 }
515 return x;
516}
517EXPORT_SYMBOL(xfrm_state_alloc);
518
519void __xfrm_state_destroy(struct xfrm_state *x)
520{
98806f75
AD		 521 struct net *net = xs_net(x);
522
547b792c 523 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 524
525 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 526 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 527 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 528 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 529}
530EXPORT_SYMBOL(__xfrm_state_destroy);
531
53bc6b4d 532int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 533{
98806f75 534 struct net *net = xs_net(x);
26b15dad
JHS		 535 int err = -ESRCH;
536
1da177e4
LT		 537 if (x->km.state != XFRM_STATE_DEAD) {
538 x->km.state = XFRM_STATE_DEAD;
539 spin_lock(&xfrm_state_lock);
12a169e7 540 list_del(&x->km.all);
8f126e37 541 hlist_del(&x->bydst);
8f126e37 542 hlist_del(&x->bysrc);
a47f0ce0 543 if (x->id.spi)
8f126e37 544 hlist_del(&x->byspi);
98806f75 545 net->xfrm.state_num--;
1da177e4 546 spin_unlock(&xfrm_state_lock);
1da177e4 547
1da177e4
LT		 548 /* All xfrm_state objects are created by xfrm_state_alloc.
549 * The xfrm_state_alloc call gives a reference, and that
550 * is what we are dropping here.
551 */
5dba4797 552 xfrm_state_put(x);
26b15dad 553 err = 0;
1da177e4 554 }
26b15dad
JHS		 555
556 return err;
1da177e4 557}
53bc6b4d 558EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 559
26b15dad 560int xfrm_state_delete(struct xfrm_state *x)
1da177e4 561{
26b15dad
JHS		 562 int err;
563
1da177e4 564 spin_lock_bh(&x->lock);
26b15dad 565 err = __xfrm_state_delete(x);
1da177e4 566 spin_unlock_bh(&x->lock);
26b15dad
JHS		 567
568 return err;
1da177e4
LT		 569}
570EXPORT_SYMBOL(xfrm_state_delete);
571
4aa2e62c
JL		 572#ifdef CONFIG_SECURITY_NETWORK_XFRM
573static inline int
0e602451 574xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 575{
4aa2e62c
JL		 576 int i, err = 0;
577
0e602451 578 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 579 struct hlist_node *entry;
580 struct xfrm_state *x;
581
0e602451 582 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 583 if (xfrm_id_proto_match(x->id.proto, proto) &&
584 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 585 xfrm_audit_state_delete(x, 0,
586 audit_info->loginuid,
2532386f 587 audit_info->sessionid,
ab5f5e8b 588 audit_info->secid);
4aa2e62c
JL		 589 return err;
590 }
591 }
592 }
593
594 return err;
595}
596#else
597static inline int
0e602451 598xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 599{
600 return 0;
601}
602#endif
603
0e602451 604int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c 605{
19f4c713 606 int i, err = 0, cnt = 0;
1da177e4
LT		 607
608 spin_lock_bh(&xfrm_state_lock);
0e602451 609 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 610 if (err)
611 goto out;
612
19f4c713 613 err = -ESRCH;
0e602451 614 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 615 struct hlist_node *entry;
616 struct xfrm_state *x;
1da177e4 617restart:
0e602451 618 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1da177e4 619 if (!xfrm_state_kern(x) &&
5794708f 620 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4
LT		 621 xfrm_state_hold(x);
622 spin_unlock_bh(&xfrm_state_lock);
623
161a09e7 624 err = xfrm_state_delete(x);
ab5f5e8b
JL		 625 xfrm_audit_state_delete(x, err ? 0 : 1,
626 audit_info->loginuid,
2532386f 627 audit_info->sessionid,
ab5f5e8b 628 audit_info->secid);
1da177e4 629 xfrm_state_put(x);
19f4c713 630 if (!err)
631 cnt++;
1da177e4
LT		 632
633 spin_lock_bh(&xfrm_state_lock);
634 goto restart;
635 }
636 }
637 }
19f4c713 638 if (cnt)
639 err = 0;
4aa2e62c
JL		 640
641out:
1da177e4 642 spin_unlock_bh(&xfrm_state_lock);
0e602451 643 wake_up(&net->xfrm.km_waitq);
4aa2e62c 644 return err;
1da177e4
LT		 645}
646EXPORT_SYMBOL(xfrm_state_flush);
647
e071041b 648void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b
JHS		 649{
650 spin_lock_bh(&xfrm_state_lock);
e071041b
AD		 651 si->sadcnt = net->xfrm.state_num;
652 si->sadhcnt = net->xfrm.state_hmask;
28d8909b
JHS		 653 si->sadhmcnt = xfrm_state_hashmax;
654 spin_unlock_bh(&xfrm_state_lock);
655}
656EXPORT_SYMBOL(xfrm_sad_getinfo);
657
1da177e4
LT		 658static int
659xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
660 struct xfrm_tmpl *tmpl,
661 xfrm_address_t *daddr, xfrm_address_t *saddr,
662 unsigned short family)
663{
664 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
665 if (!afinfo)
666 return -1;
667 afinfo->init_tempsel(x, fl, tmpl, daddr, saddr);
668 xfrm_state_put_afinfo(afinfo);
669 return 0;
670}
671
221df1ed 672static struct xfrm_state *__xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
edcd5821 673{
221df1ed 674 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821 675 struct xfrm_state *x;
8f126e37 676 struct hlist_node *entry;
edcd5821 677
221df1ed 678 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 679 if (x->props.family != family ||
680 x->id.spi != spi ||
1802571b
WY		 681 x->id.proto != proto ||
682 xfrm_addr_cmp(&x->id.daddr, daddr, family))
edcd5821
DM		 683 continue;
684
edcd5821
DM		 685 xfrm_state_hold(x);
686 return x;
687 }
688
689 return NULL;
690}
691
221df1ed 692static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family)
edcd5821 693{
221df1ed 694 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821 695 struct xfrm_state *x;
8f126e37 696 struct hlist_node *entry;
edcd5821 697
221df1ed 698 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 699 if (x->props.family != family ||
1802571b
WY		 700 x->id.proto != proto ||
701 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
702 xfrm_addr_cmp(&x->props.saddr, saddr, family))
edcd5821
DM		 703 continue;
704
edcd5821
DM		 705 xfrm_state_hold(x);
706 return x;
707 }
708
709 return NULL;
710}
711
712static inline struct xfrm_state *
713__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
714{
221df1ed
AD		 715 struct net *net = xs_net(x);
716
edcd5821 717 if (use_spi)
221df1ed 718 return __xfrm_state_lookup(net, &x->id.daddr, x->id.spi,
edcd5821
DM		 719 x->id.proto, family);
720 else
221df1ed 721 return __xfrm_state_lookup_byaddr(net, &x->id.daddr,
edcd5821
DM		 722 &x->props.saddr,
723 x->id.proto, family);
724}
725
98806f75 726static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 727{
728 if (have_hash_collision &&
98806f75
AD		 729 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
730 net->xfrm.state_num > net->xfrm.state_hmask)
731 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 732}
733
08ec9af1
DM		 734static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
735 struct flowi *fl, unsigned short family,
736 xfrm_address_t *daddr, xfrm_address_t *saddr,
737 struct xfrm_state **best, int *acq_in_progress,
738 int *error)
739{
740 /* Resolution logic:
741 * 1. There is a valid state with matching selector. Done.
742 * 2. Valid state with inappropriate selector. Skip.
743 *
744 * Entering area of "sysdeps".
745 *
746 * 3. If state is not valid, selector is temporary, it selects
747 * only session which triggered previous resolution. Key
748 * manager will do something to install a state with proper
749 * selector.
750 */
751 if (x->km.state == XFRM_STATE_VALID) {
752 if ((x->sel.family &&
753 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
754 !security_xfrm_state_pol_flow_match(x, pol, fl))
755 return;
756
757 if (!*best ||
758 (*best)->km.dying > x->km.dying ||
759 ((*best)->km.dying == x->km.dying &&
760 (*best)->curlft.add_time < x->curlft.add_time))
761 *best = x;
762 } else if (x->km.state == XFRM_STATE_ACQ) {
763 *acq_in_progress = 1;
764 } else if (x->km.state == XFRM_STATE_ERROR ||
765 x->km.state == XFRM_STATE_EXPIRED) {
766 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
767 security_xfrm_state_pol_flow_match(x, pol, fl))
768 *error = -ESRCH;
769 }
770}
771
1da177e4 772struct xfrm_state *
a716c119 773xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 774 struct flowi *fl, struct xfrm_tmpl *tmpl,
775 struct xfrm_policy *pol, int *err,
776 unsigned short family)
777{
08ec9af1 778 static xfrm_address_t saddr_wildcard = { };
5447c5e4 779 struct net *net = xp_net(pol);
6a783c90 780 unsigned int h, h_wildcard;
8f126e37 781 struct hlist_node *entry;
37b08e34 782 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 783 int acquire_in_progress = 0;
784 int error = 0;
785 struct xfrm_state *best = NULL;
a716c119 786
37b08e34
DM		 787 to_put = NULL;
788
1da177e4 789 spin_lock_bh(&xfrm_state_lock);
5447c5e4
AD		 790 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, family);
791 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
1da177e4
LT		 792 if (x->props.family == family &&
793 x->props.reqid == tmpl->reqid &&
fbd9a5b4 794 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1da177e4
LT		 795 xfrm_state_addr_check(x, daddr, saddr, family) &&
796 tmpl->mode == x->props.mode &&
797 tmpl->id.proto == x->id.proto &&
08ec9af1
DM		 798 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
799 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
800 &best, &acquire_in_progress, &error);
801 }
802 if (best)
803 goto found;
804
6a783c90
ND		 805 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, family);
806 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
08ec9af1
DM		 807 if (x->props.family == family &&
808 x->props.reqid == tmpl->reqid &&
809 !(x->props.flags & XFRM_STATE_WILDRECV) &&
810 xfrm_state_addr_check(x, daddr, saddr, family) &&
811 tmpl->mode == x->props.mode &&
812 tmpl->id.proto == x->id.proto &&
813 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
814 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
815 &best, &acquire_in_progress, &error);
1da177e4
LT		 816 }
817
08ec9af1 818found:
1da177e4
LT		 819 x = best;
820 if (!x && !error && !acquire_in_progress) {
5c5d281a 821 if (tmpl->id.spi &&
5447c5e4 822 (x0 = __xfrm_state_lookup(net, daddr, tmpl->id.spi,
edcd5821 823 tmpl->id.proto, family)) != NULL) {
37b08e34 824 to_put = x0;
1da177e4
LT		 825 error = -EEXIST;
826 goto out;
827 }
5447c5e4 828 x = xfrm_state_alloc(net);
1da177e4
LT		 829 if (x == NULL) {
830 error = -ENOMEM;
831 goto out;
832 }
833 /* Initialize temporary selector matching only
834 * to current session. */
835 xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
836
e0d1caa7
VY		 837 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
838 if (error) {
839 x->km.state = XFRM_STATE_DEAD;
37b08e34 840 to_put = x;
e0d1caa7
VY		 841 x = NULL;
842 goto out;
843 }
844
1da177e4
LT		 845 if (km_query(x, tmpl, pol) == 0) {
846 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 847 list_add(&x->km.all, &net->xfrm.state_all);
848 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
849 h = xfrm_src_hash(net, daddr, saddr, family);
850 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 851 if (x->id.spi) {
5447c5e4
AD		 852 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, family);
853 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 854 }
b27aeadb 855 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 856 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 857 net->xfrm.state_num++;
858 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 859 } else {
860 x->km.state = XFRM_STATE_DEAD;
37b08e34 861 to_put = x;
1da177e4
LT		 862 x = NULL;
863 error = -ESRCH;
864 }
865 }
866out:
867 if (x)
868 xfrm_state_hold(x);
869 else
870 *err = acquire_in_progress ? -EAGAIN : error;
871 spin_unlock_bh(&xfrm_state_lock);
37b08e34
DM		 872 if (to_put)
873 xfrm_state_put(to_put);
1da177e4
LT		 874 return x;
875}
876
628529b6 877struct xfrm_state *
5447c5e4
AD		 878xfrm_stateonly_find(struct net *net,
879 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 880 unsigned short family, u8 mode, u8 proto, u32 reqid)
881{
4bda4f25 882 unsigned int h;
628529b6
JHS		 883 struct xfrm_state *rx = NULL, *x = NULL;
884 struct hlist_node *entry;
885
886 spin_lock(&xfrm_state_lock);
5447c5e4
AD		 887 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
888 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 889 if (x->props.family == family &&
890 x->props.reqid == reqid &&
891 !(x->props.flags & XFRM_STATE_WILDRECV) &&
892 xfrm_state_addr_check(x, daddr, saddr, family) &&
893 mode == x->props.mode &&
894 proto == x->id.proto &&
895 x->km.state == XFRM_STATE_VALID) {
896 rx = x;
897 break;
898 }
899 }
900
901 if (rx)
902 xfrm_state_hold(rx);
903 spin_unlock(&xfrm_state_lock);
904
905
906 return rx;
907}
908EXPORT_SYMBOL(xfrm_stateonly_find);
909
1da177e4
LT		 910static void __xfrm_state_insert(struct xfrm_state *x)
911{
98806f75 912 struct net *net = xs_net(x);
a624c108 913 unsigned int h;
1da177e4 914
9d4a706d
DM		 915 x->genid = ++xfrm_state_genid;
916
98806f75 917 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 918
98806f75 919 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 920 x->props.reqid, x->props.family);
98806f75 921 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 922
98806f75
AD		 923 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
924 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 925
7b4dc360 926 if (x->id.spi) {
98806f75 927 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 928 x->props.family);
929
98806f75 930 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 931 }
932
9e0d57fd 933 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 934 if (x->replay_maxage)
935 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 936
98806f75 937 wake_up(&net->xfrm.km_waitq);
f034b5d4 938
98806f75 939 net->xfrm.state_num++;
f034b5d4 940
98806f75 941 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 942}
943
c7f5ea3a
DM		 944/* xfrm_state_lock is held */
945static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
946{
98806f75 947 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 948 unsigned short family = xnew->props.family;
949 u32 reqid = xnew->props.reqid;
950 struct xfrm_state *x;
951 struct hlist_node *entry;
952 unsigned int h;
953
98806f75
AD		 954 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
955 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 956 if (x->props.family == family &&
957 x->props.reqid == reqid &&
c1969f29
DM		 958 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
959 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
c7f5ea3a
DM		 960 x->genid = xfrm_state_genid;
961 }
962}
963
1da177e4
LT		 964void xfrm_state_insert(struct xfrm_state *x)
965{
966 spin_lock_bh(&xfrm_state_lock);
c7f5ea3a 967 __xfrm_state_bump_genids(x);
1da177e4
LT		 968 __xfrm_state_insert(x);
969 spin_unlock_bh(&xfrm_state_lock);
970}
971EXPORT_SYMBOL(xfrm_state_insert);
972
2770834c 973/* xfrm_state_lock is held */
5447c5e4 974static struct xfrm_state *__find_acq_core(struct net *net, unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create)
2770834c 975{
5447c5e4 976 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
8f126e37 977 struct hlist_node *entry;
2770834c
DM		 978 struct xfrm_state *x;
979
5447c5e4 980 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 981 if (x->props.reqid != reqid ||
982 x->props.mode != mode ||
983 x->props.family != family ||
984 x->km.state != XFRM_STATE_ACQ ||
75e252d9 985 x->id.spi != 0 ||
1802571b
WY		 986 x->id.proto != proto ||
987 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
988 xfrm_addr_cmp(&x->props.saddr, saddr, family))
2770834c
DM		 989 continue;
990
2770834c
DM		 991 xfrm_state_hold(x);
992 return x;
993 }
994
995 if (!create)
996 return NULL;
997
5447c5e4 998 x = xfrm_state_alloc(net);
2770834c
DM		 999 if (likely(x)) {
1000 switch (family) {
1001 case AF_INET:
1002 x->sel.daddr.a4 = daddr->a4;
1003 x->sel.saddr.a4 = saddr->a4;
1004 x->sel.prefixlen_d = 32;
1005 x->sel.prefixlen_s = 32;
1006 x->props.saddr.a4 = saddr->a4;
1007 x->id.daddr.a4 = daddr->a4;
1008 break;
1009
1010 case AF_INET6:
1011 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1012 (struct in6_addr *)daddr);
1013 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1014 (struct in6_addr *)saddr);
1015 x->sel.prefixlen_d = 128;
1016 x->sel.prefixlen_s = 128;
1017 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1018 (struct in6_addr *)saddr);
1019 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1020 (struct in6_addr *)daddr);
1021 break;
3ff50b79 1022 }
2770834c
DM		 1023
1024 x->km.state = XFRM_STATE_ACQ;
1025 x->id.proto = proto;
1026 x->props.family = family;
1027 x->props.mode = mode;
1028 x->props.reqid = reqid;
b27aeadb 1029 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1030 xfrm_state_hold(x);
9e0d57fd 1031 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1032 list_add(&x->km.all, &net->xfrm.state_all);
1033 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1034 h = xfrm_src_hash(net, daddr, saddr, family);
1035 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1036
5447c5e4 1037 net->xfrm.state_num++;
918049f0 1038
5447c5e4 1039 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1040 }
1041
1042 return x;
1043}
1044
5447c5e4 1045static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 seq);
1da177e4
LT		 1046
1047int xfrm_state_add(struct xfrm_state *x)
1048{
5447c5e4 1049 struct net *net = xs_net(x);
37b08e34 1050 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1051 int family;
1052 int err;
eb2971b6 1053 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1054
1055 family = x->props.family;
1da177e4 1056
37b08e34
DM		 1057 to_put = NULL;
1058
1da177e4
LT		 1059 spin_lock_bh(&xfrm_state_lock);
1060
edcd5821 1061 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1062 if (x1) {
37b08e34 1063 to_put = x1;
1da177e4
LT		 1064 x1 = NULL;
1065 err = -EEXIST;
1066 goto out;
1067 }
1068
eb2971b6 1069 if (use_spi && x->km.seq) {
5447c5e4 1070 x1 = __xfrm_find_acq_byseq(net, x->km.seq);
75e252d9
JL		 1071 if (x1 && ((x1->id.proto != x->id.proto) ||
1072 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1073 to_put = x1;
1da177e4
LT		 1074 x1 = NULL;
1075 }
1076 }
1077
eb2971b6 1078 if (use_spi && !x1)
5447c5e4 1079 x1 = __find_acq_core(net, family, x->props.mode, x->props.reqid,
2770834c
DM		 1080 x->id.proto,
1081 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1082
c7f5ea3a 1083 __xfrm_state_bump_genids(x);
1da177e4
LT		 1084 __xfrm_state_insert(x);
1085 err = 0;
1086
1087out:
1088 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1089
1090 if (x1) {
1091 xfrm_state_delete(x1);
1092 xfrm_state_put(x1);
1093 }
1094
37b08e34
DM		 1095 if (to_put)
1096 xfrm_state_put(to_put);
1097
1da177e4
LT		 1098 return err;
1099}
1100EXPORT_SYMBOL(xfrm_state_add);
1101
80c9abaa 1102#ifdef CONFIG_XFRM_MIGRATE
6666351d 1103static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1104{
98806f75 1105 struct net *net = xs_net(orig);
80c9abaa 1106 int err = -ENOMEM;
98806f75 1107 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa
SS		 1108 if (!x)
1109 goto error;
1110
1111 memcpy(&x->id, &orig->id, sizeof(x->id));
1112 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1113 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1114 x->props.mode = orig->props.mode;
1115 x->props.replay_window = orig->props.replay_window;
1116 x->props.reqid = orig->props.reqid;
1117 x->props.family = orig->props.family;
1118 x->props.saddr = orig->props.saddr;
1119
1120 if (orig->aalg) {
4447bb33 1121 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1122 if (!x->aalg)
1123 goto error;
1124 }
1125 x->props.aalgo = orig->props.aalgo;
1126
1127 if (orig->ealg) {
1128 x->ealg = xfrm_algo_clone(orig->ealg);
1129 if (!x->ealg)
1130 goto error;
1131 }
1132 x->props.ealgo = orig->props.ealgo;
1133
1134 if (orig->calg) {
1135 x->calg = xfrm_algo_clone(orig->calg);
1136 if (!x->calg)
1137 goto error;
1138 }
1139 x->props.calgo = orig->props.calgo;
1140
a716c119 1141 if (orig->encap) {
80c9abaa
SS		 1142 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1143 if (!x->encap)
1144 goto error;
1145 }
1146
1147 if (orig->coaddr) {
1148 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1149 GFP_KERNEL);
1150 if (!x->coaddr)
1151 goto error;
1152 }
1153
1154 err = xfrm_init_state(x);
1155 if (err)
1156 goto error;
1157
1158 x->props.flags = orig->props.flags;
1159
1160 x->curlft.add_time = orig->curlft.add_time;
1161 x->km.state = orig->km.state;
1162 x->km.seq = orig->km.seq;
1163
1164 return x;
1165
1166 error:
1167 if (errp)
1168 *errp = err;
1169 if (x) {
1170 kfree(x->aalg);
1171 kfree(x->ealg);
1172 kfree(x->calg);
1173 kfree(x->encap);
1174 kfree(x->coaddr);
1175 }
1176 kfree(x);
1177 return NULL;
1178}
80c9abaa
SS		 1179
1180/* xfrm_state_lock is held */
1181struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1182{
1183 unsigned int h;
1184 struct xfrm_state *x;
1185 struct hlist_node *entry;
1186
1187 if (m->reqid) {
64d0cd00 1188 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1189 m->reqid, m->old_family);
73d189dc 1190 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1191 if (x->props.mode != m->mode ||
1192 x->id.proto != m->proto)
1193 continue;
1194 if (m->reqid && x->props.reqid != m->reqid)
1195 continue;
1196 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1197 m->old_family) ||
1198 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1199 m->old_family))
1200 continue;
1201 xfrm_state_hold(x);
1202 return x;
1203 }
1204 } else {
64d0cd00 1205 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1206 m->old_family);
d320bbb3 1207 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1208 if (x->props.mode != m->mode ||
1209 x->id.proto != m->proto)
1210 continue;
1211 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1212 m->old_family) ||
1213 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1214 m->old_family))
1215 continue;
1216 xfrm_state_hold(x);
1217 return x;
1218 }
1219 }
1220
a716c119 1221 return NULL;
80c9abaa
SS		 1222}
1223EXPORT_SYMBOL(xfrm_migrate_state_find);
1224
1225struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1226 struct xfrm_migrate *m)
1227{
1228 struct xfrm_state *xc;
1229 int err;
1230
1231 xc = xfrm_state_clone(x, &err);
1232 if (!xc)
1233 return NULL;
1234
1235 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1236 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1237
1238 /* add state */
1239 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1240 /* a care is needed when the destination address of the
1241 state is to be updated as it is a part of triplet */
1242 xfrm_state_insert(xc);
1243 } else {
1244 if ((err = xfrm_state_add(xc)) < 0)
1245 goto error;
1246 }
1247
1248 return xc;
1249error:
1250 kfree(xc);
1251 return NULL;
1252}
1253EXPORT_SYMBOL(xfrm_state_migrate);
1254#endif
1255
1da177e4
LT		 1256int xfrm_state_update(struct xfrm_state *x)
1257{
37b08e34 1258 struct xfrm_state *x1, *to_put;
1da177e4 1259 int err;
eb2971b6 1260 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4 1261
37b08e34
DM		 1262 to_put = NULL;
1263
1da177e4 1264 spin_lock_bh(&xfrm_state_lock);
edcd5821 1265 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1266
1267 err = -ESRCH;
1268 if (!x1)
1269 goto out;
1270
1271 if (xfrm_state_kern(x1)) {
37b08e34 1272 to_put = x1;
1da177e4
LT		 1273 err = -EEXIST;
1274 goto out;
1275 }
1276
1277 if (x1->km.state == XFRM_STATE_ACQ) {
1278 __xfrm_state_insert(x);
1279 x = NULL;
1280 }
1281 err = 0;
1282
1283out:
1284 spin_unlock_bh(&xfrm_state_lock);
1da177e4 1285
37b08e34
DM		 1286 if (to_put)
1287 xfrm_state_put(to_put);
1288
1da177e4
LT		 1289 if (err)
1290 return err;
1291
1292 if (!x) {
1293 xfrm_state_delete(x1);
1294 xfrm_state_put(x1);
1295 return 0;
1296 }
1297
1298 err = -EINVAL;
1299 spin_lock_bh(&x1->lock);
1300 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1301 if (x->encap && x1->encap)
1302 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1303 if (x->coaddr && x1->coaddr) {
1304 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1305 }
1306 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1307 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1308 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1309 x1->km.dying = 0;
1310
9e0d57fd 1311 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1312 if (x1->curlft.use_time)
1313 xfrm_state_check_expire(x1);
1314
1315 err = 0;
1316 }
1317 spin_unlock_bh(&x1->lock);
1318
1319 xfrm_state_put(x1);
1320
1321 return err;
1322}
1323EXPORT_SYMBOL(xfrm_state_update);
1324
1325int xfrm_state_check_expire(struct xfrm_state *x)
1326{
1327 if (!x->curlft.use_time)
9d729f72 1328 x->curlft.use_time = get_seconds();
1da177e4
LT		 1329
1330 if (x->km.state != XFRM_STATE_VALID)
1331 return -EINVAL;
1332
1333 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1334 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1335 x->km.state = XFRM_STATE_EXPIRED;
9e0d57fd 1336 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1da177e4
LT		 1337 return -EINVAL;
1338 }
1339
1340 if (!x->km.dying &&
1341 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1342 x->curlft.packets >= x->lft.soft_packet_limit)) {
1343 x->km.dying = 1;
53bc6b4d 1344 km_state_expired(x, 0, 0);
4666faab 1345 }
1da177e4
LT		 1346 return 0;
1347}
1348EXPORT_SYMBOL(xfrm_state_check_expire);
1349
1da177e4 1350struct xfrm_state *
221df1ed 1351xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto,
1da177e4
LT		 1352 unsigned short family)
1353{
1354 struct xfrm_state *x;
1da177e4
LT		 1355
1356 spin_lock_bh(&xfrm_state_lock);
221df1ed 1357 x = __xfrm_state_lookup(net, daddr, spi, proto, family);
1da177e4 1358 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1359 return x;
1360}
1361EXPORT_SYMBOL(xfrm_state_lookup);
1362
1363struct xfrm_state *
221df1ed
AD		 1364xfrm_state_lookup_byaddr(struct net *net,
1365 xfrm_address_t *daddr, xfrm_address_t *saddr,
eb2971b6
MN		 1366 u8 proto, unsigned short family)
1367{
1368 struct xfrm_state *x;
eb2971b6
MN		 1369
1370 spin_lock_bh(&xfrm_state_lock);
221df1ed 1371 x = __xfrm_state_lookup_byaddr(net, daddr, saddr, proto, family);
eb2971b6 1372 spin_unlock_bh(&xfrm_state_lock);
eb2971b6
MN		 1373 return x;
1374}
1375EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1376
1377struct xfrm_state *
5447c5e4 1378xfrm_find_acq(struct net *net, u8 mode, u32 reqid, u8 proto,
a716c119 1379 xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 1380 int create, unsigned short family)
1381{
1382 struct xfrm_state *x;
1da177e4
LT		 1383
1384 spin_lock_bh(&xfrm_state_lock);
5447c5e4 1385 x = __find_acq_core(net, family, mode, reqid, proto, daddr, saddr, create);
1da177e4 1386 spin_unlock_bh(&xfrm_state_lock);
2770834c 1387
1da177e4
LT		 1388 return x;
1389}
1390EXPORT_SYMBOL(xfrm_find_acq);
1391
41a49cc3
MN		 1392#ifdef CONFIG_XFRM_SUB_POLICY
1393int
1394xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1395 unsigned short family)
1396{
1397 int err = 0;
1398 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1399 if (!afinfo)
1400 return -EAFNOSUPPORT;
1401
1402 spin_lock_bh(&xfrm_state_lock);
1403 if (afinfo->tmpl_sort)
1404 err = afinfo->tmpl_sort(dst, src, n);
1405 spin_unlock_bh(&xfrm_state_lock);
1406 xfrm_state_put_afinfo(afinfo);
1407 return err;
1408}
1409EXPORT_SYMBOL(xfrm_tmpl_sort);
1410
1411int
1412xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1413 unsigned short family)
1414{
1415 int err = 0;
1416 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1417 if (!afinfo)
1418 return -EAFNOSUPPORT;
1419
1420 spin_lock_bh(&xfrm_state_lock);
1421 if (afinfo->state_sort)
1422 err = afinfo->state_sort(dst, src, n);
1423 spin_unlock_bh(&xfrm_state_lock);
1424 xfrm_state_put_afinfo(afinfo);
1425 return err;
1426}
1427EXPORT_SYMBOL(xfrm_state_sort);
1428#endif
1429
1da177e4
LT		 1430/* Silly enough, but I'm lazy to build resolution list */
1431
5447c5e4 1432static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 seq)
1da177e4
LT		 1433{
1434 int i;
1da177e4 1435
5447c5e4 1436 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1437 struct hlist_node *entry;
1438 struct xfrm_state *x;
1439
5447c5e4 1440 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
8f126e37
DM		 1441 if (x->km.seq == seq &&
1442 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1443 xfrm_state_hold(x);
1444 return x;
1445 }
1446 }
1447 }
1448 return NULL;
1449}
1450
5447c5e4 1451struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 seq)
1da177e4
LT		 1452{
1453 struct xfrm_state *x;
1454
1455 spin_lock_bh(&xfrm_state_lock);
5447c5e4 1456 x = __xfrm_find_acq_byseq(net, seq);
1da177e4
LT		 1457 spin_unlock_bh(&xfrm_state_lock);
1458 return x;
1459}
1460EXPORT_SYMBOL(xfrm_find_acq_byseq);
1461
1462u32 xfrm_get_acqseq(void)
1463{
1464 u32 res;
6836b9bd 1465 static atomic_t acqseq;
1466
1467 do {
1468 res = atomic_inc_return(&acqseq);
1469 } while (!res);
1da177e4 1470
1da177e4
LT		 1471 return res;
1472}
1473EXPORT_SYMBOL(xfrm_get_acqseq);
1474
658b219e 1475int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1476{
221df1ed 1477 struct net *net = xs_net(x);
f034b5d4 1478 unsigned int h;
1da177e4 1479 struct xfrm_state *x0;
658b219e
HX		 1480 int err = -ENOENT;
1481 __be32 minspi = htonl(low);
1482 __be32 maxspi = htonl(high);
1da177e4 1483
658b219e
HX		 1484 spin_lock_bh(&x->lock);
1485 if (x->km.state == XFRM_STATE_DEAD)
1486 goto unlock;
1487
1488 err = 0;
1da177e4 1489 if (x->id.spi)
658b219e
HX		 1490 goto unlock;
1491
1492 err = -ENOENT;
1da177e4
LT		 1493
1494 if (minspi == maxspi) {
221df1ed 1495 x0 = xfrm_state_lookup(net, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1496 if (x0) {
1497 xfrm_state_put(x0);
658b219e 1498 goto unlock;
1da177e4
LT		 1499 }
1500 x->id.spi = minspi;
1501 } else {
1502 u32 spi = 0;
26977b4e
AV		 1503 for (h=0; h<high-low+1; h++) {
1504 spi = low + net_random()%(high-low+1);
221df1ed 1505 x0 = xfrm_state_lookup(net, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1506 if (x0 == NULL) {
1507 x->id.spi = htonl(spi);
1508 break;
1509 }
1510 xfrm_state_put(x0);
1511 }
1512 }
1513 if (x->id.spi) {
1514 spin_lock_bh(&xfrm_state_lock);
12604d8a
AD		 1515 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1516 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 1517 spin_unlock_bh(&xfrm_state_lock);
658b219e
HX		 1518
1519 err = 0;
1da177e4 1520 }
658b219e
HX		 1521
1522unlock:
1523 spin_unlock_bh(&x->lock);
1524
1525 return err;
1da177e4
LT		 1526}
1527EXPORT_SYMBOL(xfrm_alloc_spi);
1528
284fa7da 1529int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1530 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1531 void *data)
1532{
12a169e7
HX		 1533 struct xfrm_state *state;
1534 struct xfrm_state_walk *x;
1da177e4
LT		 1535 int err = 0;
1536
12a169e7 1537 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1538 return 0;
1539
1da177e4 1540 spin_lock_bh(&xfrm_state_lock);
12a169e7 1541 if (list_empty(&walk->all))
284fa7da 1542 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1543 else
1544 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1545 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1546 if (x->state == XFRM_STATE_DEAD)
4c563f76 1547 continue;
12a169e7
HX		 1548 state = container_of(x, struct xfrm_state, km);
1549 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1550 continue;
12a169e7
HX		 1551 err = func(state, walk->seq, data);
1552 if (err) {
1553 list_move_tail(&walk->all, &x->all);
1554 goto out;
1da177e4 1555 }
12a169e7 1556 walk->seq++;
1da177e4 1557 }
12a169e7 1558 if (walk->seq == 0) {
1da177e4
LT		 1559 err = -ENOENT;
1560 goto out;
1561 }
12a169e7 1562 list_del_init(&walk->all);
1da177e4
LT		 1563out:
1564 spin_unlock_bh(&xfrm_state_lock);
1565 return err;
1566}
1567EXPORT_SYMBOL(xfrm_state_walk);
1568
5c182458
HX		 1569void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1570{
12a169e7 1571 INIT_LIST_HEAD(&walk->all);
5c182458 1572 walk->proto = proto;
12a169e7
HX		 1573 walk->state = XFRM_STATE_DEAD;
1574 walk->seq = 0;
5c182458
HX		 1575}
1576EXPORT_SYMBOL(xfrm_state_walk_init);
1577
abb81c4f
HX		 1578void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1579{
12a169e7 1580 if (list_empty(&walk->all))
5c182458 1581 return;
5c182458 1582
12a169e7
HX		 1583 spin_lock_bh(&xfrm_state_lock);
1584 list_del(&walk->all);
7d0b591c 1585 spin_unlock_bh(&xfrm_state_lock);
abb81c4f
HX		 1586}
1587EXPORT_SYMBOL(xfrm_state_walk_done);
1588
f8cd5488
JHS		 1589
1590void xfrm_replay_notify(struct xfrm_state *x, int event)
1591{
1592 struct km_event c;
1593 /* we send notify messages in case
1594 * 1. we updated on of the sequence numbers, and the seqno difference
1595 * is at least x->replay_maxdiff, in this case we also update the
1596 * timeout of our timer function
1597 * 2. if x->replay_maxage has elapsed since last update,
1598 * and there were changes
1599 *
1600 * The state structure must be locked!
1601 */
1602
1603 switch (event) {
1604 case XFRM_REPLAY_UPDATE:
1605 if (x->replay_maxdiff &&
1606 (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
2717096a
JHS		 1607 (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
1608 if (x->xflags & XFRM_TIME_DEFER)
1609 event = XFRM_REPLAY_TIMEOUT;
1610 else
1611 return;
1612 }
f8cd5488
JHS		 1613
1614 break;
1615
1616 case XFRM_REPLAY_TIMEOUT:
1617 if ((x->replay.seq == x->preplay.seq) &&
1618 (x->replay.bitmap == x->preplay.bitmap) &&
2717096a
JHS		 1619 (x->replay.oseq == x->preplay.oseq)) {
1620 x->xflags |= XFRM_TIME_DEFER;
f8cd5488 1621 return;
2717096a 1622 }
f8cd5488
JHS		 1623
1624 break;
1625 }
1626
1627 memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
1628 c.event = XFRM_MSG_NEWAE;
1629 c.data.aevent = event;
1630 km_state_notify(x, &c);
1631
f8cd5488 1632 if (x->replay_maxage &&
a47f0ce0 1633 !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
2717096a 1634 x->xflags &= ~XFRM_TIME_DEFER;
f8cd5488
JHS		 1635}
1636
1637static void xfrm_replay_timer_handler(unsigned long data)
1638{
1639 struct xfrm_state *x = (struct xfrm_state*)data;
1640
1641 spin_lock(&x->lock);
1642
2717096a 1643 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1644 if (xfrm_aevent_is_on(xs_net(x)))
2717096a
JHS		 1645 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
1646 else
1647 x->xflags |= XFRM_TIME_DEFER;
1648 }
f8cd5488
JHS		 1649
1650 spin_unlock(&x->lock);
1651}
1652
afeb14b4
PM		 1653int xfrm_replay_check(struct xfrm_state *x,
1654 struct sk_buff *skb, __be32 net_seq)
1da177e4
LT		 1655{
1656 u32 diff;
a252cc23 1657 u32 seq = ntohl(net_seq);
1da177e4
LT		 1658
1659 if (unlikely(seq == 0))
afeb14b4 1660 goto err;
1da177e4
LT		 1661
1662 if (likely(seq > x->replay.seq))
1663 return 0;
1664
1665 diff = x->replay.seq - seq;
4c4d51a7
HX		 1666 if (diff >= min_t(unsigned int, x->props.replay_window,
1667 sizeof(x->replay.bitmap) * 8)) {
1da177e4 1668 x->stats.replay_window++;
afeb14b4 1669 goto err;
1da177e4
LT		 1670 }
1671
1672 if (x->replay.bitmap & (1U << diff)) {
1673 x->stats.replay++;
afeb14b4 1674 goto err;
1da177e4
LT		 1675 }
1676 return 0;
afeb14b4
PM		 1677
1678err:
1679 xfrm_audit_state_replay(x, skb, net_seq);
1680 return -EINVAL;
1da177e4 1681}
1da177e4 1682
61f4627b 1683void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
1da177e4
LT		 1684{
1685 u32 diff;
61f4627b 1686 u32 seq = ntohl(net_seq);
1da177e4
LT		 1687
1688 if (seq > x->replay.seq) {
1689 diff = seq - x->replay.seq;
1690 if (diff < x->props.replay_window)
1691 x->replay.bitmap = ((x->replay.bitmap) << diff) | 1;
1692 else
1693 x->replay.bitmap = 1;
1694 x->replay.seq = seq;
1695 } else {
1696 diff = x->replay.seq - seq;
1697 x->replay.bitmap |= (1U << diff);
1698 }
f8cd5488 1699
a6483b79 1700 if (xfrm_aevent_is_on(xs_net(x)))
f8cd5488 1701 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1da177e4 1702}
1da177e4 1703
df01812e 1704static LIST_HEAD(xfrm_km_list);
1da177e4
LT		 1705static DEFINE_RWLOCK(xfrm_km_lock);
1706
26b15dad 1707void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 1708{
1709 struct xfrm_mgr *km;
1710
26b15dad
JHS		 1711 read_lock(&xfrm_km_lock);
1712 list_for_each_entry(km, &xfrm_km_list, list)
1713 if (km->notify_policy)
1714 km->notify_policy(xp, dir, c);
1715 read_unlock(&xfrm_km_lock);
1716}
1da177e4 1717
26b15dad
JHS		 1718void km_state_notify(struct xfrm_state *x, struct km_event *c)
1719{
1720 struct xfrm_mgr *km;
1da177e4
LT		 1721 read_lock(&xfrm_km_lock);
1722 list_for_each_entry(km, &xfrm_km_list, list)
26b15dad
JHS		 1723 if (km->notify)
1724 km->notify(x, c);
1da177e4 1725 read_unlock(&xfrm_km_lock);
26b15dad
JHS		 1726}
1727
1728EXPORT_SYMBOL(km_policy_notify);
1729EXPORT_SYMBOL(km_state_notify);
1730
53bc6b4d 1731void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
26b15dad 1732{
98806f75 1733 struct net *net = xs_net(x);
26b15dad
JHS		 1734 struct km_event c;
1735
bf08867f 1736 c.data.hard = hard;
53bc6b4d 1737 c.pid = pid;
f60f6b8f 1738 c.event = XFRM_MSG_EXPIRE;
26b15dad 1739 km_state_notify(x, &c);
1da177e4
LT		 1740
1741 if (hard)
98806f75 1742 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1743}
1744
53bc6b4d 1745EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1746/*
1747 * We send to all registered managers regardless of failure
1748 * We are happy with one success
1749*/
980ebd25 1750int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1751{
26b15dad 1752 int err = -EINVAL, acqret;
1da177e4
LT		 1753 struct xfrm_mgr *km;
1754
1755 read_lock(&xfrm_km_lock);
1756 list_for_each_entry(km, &xfrm_km_list, list) {
26b15dad
JHS		 1757 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1758 if (!acqret)
1759 err = acqret;
1da177e4
LT		 1760 }
1761 read_unlock(&xfrm_km_lock);
1762 return err;
1763}
980ebd25 1764EXPORT_SYMBOL(km_query);
1da177e4 1765
5d36b180 1766int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1767{
1768 int err = -EINVAL;
1769 struct xfrm_mgr *km;
1770
1771 read_lock(&xfrm_km_lock);
1772 list_for_each_entry(km, &xfrm_km_list, list) {
1773 if (km->new_mapping)
1774 err = km->new_mapping(x, ipaddr, sport);
1775 if (!err)
1776 break;
1777 }
1778 read_unlock(&xfrm_km_lock);
1779 return err;
1780}
1781EXPORT_SYMBOL(km_new_mapping);
1782
6c5c8ca7 1783void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1da177e4 1784{
98806f75 1785 struct net *net = xp_net(pol);
26b15dad 1786 struct km_event c;
1da177e4 1787
bf08867f 1788 c.data.hard = hard;
6c5c8ca7 1789 c.pid = pid;
f60f6b8f 1790 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1791 km_policy_notify(pol, dir, &c);
1da177e4
LT		 1792
1793 if (hard)
98806f75 1794 wake_up(&net->xfrm.km_waitq);
1da177e4 1795}
a70fcb0b 1796EXPORT_SYMBOL(km_policy_expired);
1da177e4 1797
2d60abc2 1798#ifdef CONFIG_XFRM_MIGRATE
80c9abaa 1799int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1800 struct xfrm_migrate *m, int num_migrate,
1801 struct xfrm_kmaddress *k)
80c9abaa
SS		 1802{
1803 int err = -EINVAL;
1804 int ret;
1805 struct xfrm_mgr *km;
1806
1807 read_lock(&xfrm_km_lock);
1808 list_for_each_entry(km, &xfrm_km_list, list) {
1809 if (km->migrate) {
13c1d189 1810 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1811 if (!ret)
1812 err = ret;
1813 }
1814 }
1815 read_unlock(&xfrm_km_lock);
1816 return err;
1817}
1818EXPORT_SYMBOL(km_migrate);
2d60abc2 1819#endif
80c9abaa 1820
db983c11 1821int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1822{
1823 int err = -EINVAL;
1824 int ret;
1825 struct xfrm_mgr *km;
1826
1827 read_lock(&xfrm_km_lock);
1828 list_for_each_entry(km, &xfrm_km_list, list) {
1829 if (km->report) {
db983c11 1830 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1831 if (!ret)
1832 err = ret;
1833 }
1834 }
1835 read_unlock(&xfrm_km_lock);
1836 return err;
1837}
1838EXPORT_SYMBOL(km_report);
1839
1da177e4
LT		 1840int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1841{
1842 int err;
1843 u8 *data;
1844 struct xfrm_mgr *km;
1845 struct xfrm_policy *pol = NULL;
1846
1847 if (optlen <= 0 || optlen > PAGE_SIZE)
1848 return -EMSGSIZE;
1849
1850 data = kmalloc(optlen, GFP_KERNEL);
1851 if (!data)
1852 return -ENOMEM;
1853
1854 err = -EFAULT;
1855 if (copy_from_user(data, optval, optlen))
1856 goto out;
1857
1858 err = -EINVAL;
1859 read_lock(&xfrm_km_lock);
1860 list_for_each_entry(km, &xfrm_km_list, list) {
cb969f07 1861 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1862 optlen, &err);
1863 if (err >= 0)
1864 break;
1865 }
1866 read_unlock(&xfrm_km_lock);
1867
1868 if (err >= 0) {
1869 xfrm_sk_policy_insert(sk, err, pol);
1870 xfrm_pol_put(pol);
1871 err = 0;
1872 }
1873
1874out:
1875 kfree(data);
1876 return err;
1877}
1878EXPORT_SYMBOL(xfrm_user_policy);
1879
1880int xfrm_register_km(struct xfrm_mgr *km)
1881{
1882 write_lock_bh(&xfrm_km_lock);
1883 list_add_tail(&km->list, &xfrm_km_list);
1884 write_unlock_bh(&xfrm_km_lock);
1885 return 0;
1886}
1887EXPORT_SYMBOL(xfrm_register_km);
1888
1889int xfrm_unregister_km(struct xfrm_mgr *km)
1890{
1891 write_lock_bh(&xfrm_km_lock);
1892 list_del(&km->list);
1893 write_unlock_bh(&xfrm_km_lock);
1894 return 0;
1895}
1896EXPORT_SYMBOL(xfrm_unregister_km);
1897
1898int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1899{
1900 int err = 0;
1901 if (unlikely(afinfo == NULL))
1902 return -EINVAL;
1903 if (unlikely(afinfo->family >= NPROTO))
1904 return -EAFNOSUPPORT;
f3111502 1905 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1906 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1907 err = -ENOBUFS;
edcd5821 1908 else
1da177e4 1909 xfrm_state_afinfo[afinfo->family] = afinfo;
f3111502 1910 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1911 return err;
1912}
1913EXPORT_SYMBOL(xfrm_state_register_afinfo);
1914
1915int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1916{
1917 int err = 0;
1918 if (unlikely(afinfo == NULL))
1919 return -EINVAL;
1920 if (unlikely(afinfo->family >= NPROTO))
1921 return -EAFNOSUPPORT;
f3111502 1922 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1923 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1924 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1925 err = -EINVAL;
edcd5821 1926 else
1da177e4 1927 xfrm_state_afinfo[afinfo->family] = NULL;
1da177e4 1928 }
f3111502 1929 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1930 return err;
1931}
1932EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1933
17c2a42a 1934static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1935{
1936 struct xfrm_state_afinfo *afinfo;
1937 if (unlikely(family >= NPROTO))
1938 return NULL;
1939 read_lock(&xfrm_state_afinfo_lock);
1940 afinfo = xfrm_state_afinfo[family];
546be240
HX		 1941 if (unlikely(!afinfo))
1942 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1943 return afinfo;
1944}
1945
17c2a42a 1946static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 1947 __releases(xfrm_state_afinfo_lock)
1da177e4 1948{
546be240 1949 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1950}
1951
1952/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1953void xfrm_state_delete_tunnel(struct xfrm_state *x)
1954{
1955 if (x->tunnel) {
1956 struct xfrm_state *t = x->tunnel;
1957
1958 if (atomic_read(&t->tunnel_users) == 2)
1959 xfrm_state_delete(t);
1960 atomic_dec(&t->tunnel_users);
1961 xfrm_state_put(t);
1962 x->tunnel = NULL;
1963 }
1964}
1965EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1966
1967int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1968{
c5c25238 1969 int res;
1da177e4 1970
c5c25238
PM		 1971 spin_lock_bh(&x->lock);
1972 if (x->km.state == XFRM_STATE_VALID &&
1973 x->type && x->type->get_mtu)
1974 res = x->type->get_mtu(x, mtu);
1975 else
28121617 1976 res = mtu - x->props.header_len;
c5c25238 1977 spin_unlock_bh(&x->lock);
1da177e4
LT		 1978 return res;
1979}
1980
72cb6962
HX		 1981int xfrm_init_state(struct xfrm_state *x)
1982{
d094cd83 1983 struct xfrm_state_afinfo *afinfo;
df9dcb45 1984 struct xfrm_mode *inner_mode;
d094cd83 1985 int family = x->props.family;
72cb6962
HX		 1986 int err;
1987
d094cd83
HX		 1988 err = -EAFNOSUPPORT;
1989 afinfo = xfrm_state_get_afinfo(family);
1990 if (!afinfo)
1991 goto error;
1992
1993 err = 0;
1994 if (afinfo->init_flags)
1995 err = afinfo->init_flags(x);
1996
1997 xfrm_state_put_afinfo(afinfo);
1998
1999 if (err)
2000 goto error;
2001
2002 err = -EPROTONOSUPPORT;
13996378 2003
df9dcb45
KM		 2004 if (x->sel.family != AF_UNSPEC) {
2005 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2006 if (inner_mode == NULL)
2007 goto error;
2008
2009 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2010 family != x->sel.family) {
2011 xfrm_put_mode(inner_mode);
2012 goto error;
2013 }
2014
2015 x->inner_mode = inner_mode;
2016 } else {
2017 struct xfrm_mode *inner_mode_iaf;
d81d2285 2018 int iafamily = AF_INET;
df9dcb45 2019
d81d2285 2020 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2021 if (inner_mode == NULL)
2022 goto error;
2023
2024 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2025 xfrm_put_mode(inner_mode);
2026 goto error;
2027 }
d81d2285 2028 x->inner_mode = inner_mode;
df9dcb45 2029
d81d2285
MW		 2030 if (x->props.family == AF_INET)
2031 iafamily = AF_INET6;
df9dcb45 2032
d81d2285
MW		 2033 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2034 if (inner_mode_iaf) {
2035 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2036 x->inner_mode_iaf = inner_mode_iaf;
2037 else
2038 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 2039 }
2040 }
13996378 2041
d094cd83 2042 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2043 if (x->type == NULL)
2044 goto error;
2045
2046 err = x->type->init_state(x);
2047 if (err)
2048 goto error;
2049
13996378
HX		 2050 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2051 if (x->outer_mode == NULL)
b59f45d0
HX		 2052 goto error;
2053
72cb6962
HX		 2054 x->km.state = XFRM_STATE_VALID;
2055
2056error:
2057 return err;
2058}
2059
2060EXPORT_SYMBOL(xfrm_init_state);
a716c119 2061
d62ddc21 2062int __net_init xfrm_state_init(struct net *net)
1da177e4 2063{
f034b5d4
DM		 2064 unsigned int sz;
2065
9d4139c7
AD		 2066 INIT_LIST_HEAD(&net->xfrm.state_all);
2067
f034b5d4
DM		 2068 sz = sizeof(struct hlist_head) * 8;
2069
73d189dc
AD		 2070 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2071 if (!net->xfrm.state_bydst)
2072 goto out_bydst;
d320bbb3
AD		 2073 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2074 if (!net->xfrm.state_bysrc)
2075 goto out_bysrc;
b754a4fd
AD		 2076 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2077 if (!net->xfrm.state_byspi)
2078 goto out_byspi;
529983ec 2079 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2080
0bf7c5b0 2081 net->xfrm.state_num = 0;
63082733 2082 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2083 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2084 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
50a30657 2085 init_waitqueue_head(&net->xfrm.km_waitq);
d62ddc21 2086 return 0;
73d189dc 2087
b754a4fd
AD		 2088out_byspi:
2089 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2090out_bysrc:
2091 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2092out_bydst:
2093 return -ENOMEM;
d62ddc21
AD		 2094}
2095
2096void xfrm_state_fini(struct net *net)
2097{
7c2776ee 2098 struct xfrm_audit audit_info;
73d189dc
AD		 2099 unsigned int sz;
2100
7c2776ee
AD		 2101 flush_work(&net->xfrm.state_hash_work);
2102 audit_info.loginuid = -1;
2103 audit_info.sessionid = -1;
2104 audit_info.secid = 0;
2105 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2106 flush_work(&net->xfrm.state_gc_work);
2107
9d4139c7 2108 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2109
529983ec 2110 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2111 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2112 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2113 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2114 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2115 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2116 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2117}
2118
ab5f5e8b 2119#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2120static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2121 struct audit_buffer *audit_buf)
ab5f5e8b 2122{
68277acc
PM		 2123 struct xfrm_sec_ctx *ctx = x->security;
2124 u32 spi = ntohl(x->id.spi);
2125
2126 if (ctx)
ab5f5e8b 2127 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2128 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2129
2130 switch(x->props.family) {
2131 case AF_INET:
21454aaa
HH		 2132 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2133 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2134 break;
2135 case AF_INET6:
5b095d98 2136 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2137 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2138 break;
2139 }
68277acc
PM		 2140
2141 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2142}
2143
cf35f43e
IJ		 2144static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2145 struct audit_buffer *audit_buf)
afeb14b4
PM		 2146{
2147 struct iphdr *iph4;
2148 struct ipv6hdr *iph6;
2149
2150 switch (family) {
2151 case AF_INET:
2152 iph4 = ip_hdr(skb);
21454aaa
HH		 2153 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2154 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2155 break;
2156 case AF_INET6:
2157 iph6 = ipv6_hdr(skb);
2158 audit_log_format(audit_buf,
5b095d98 2159 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2160 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2161 iph6->flow_lbl[0] & 0x0f,
2162 iph6->flow_lbl[1],
2163 iph6->flow_lbl[2]);
2164 break;
2165 }
2166}
2167
68277acc 2168void xfrm_audit_state_add(struct xfrm_state *x, int result,
2532386f 2169 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2170{
2171 struct audit_buffer *audit_buf;
ab5f5e8b 2172
afeb14b4 2173 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2174 if (audit_buf == NULL)
2175 return;
2532386f 2176 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2177 xfrm_audit_helper_sainfo(x, audit_buf);
2178 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2179 audit_log_end(audit_buf);
2180}
2181EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2182
68277acc 2183void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2532386f 2184 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2185{
2186 struct audit_buffer *audit_buf;
ab5f5e8b 2187
afeb14b4 2188 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2189 if (audit_buf == NULL)
2190 return;
2532386f 2191 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2192 xfrm_audit_helper_sainfo(x, audit_buf);
2193 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2194 audit_log_end(audit_buf);
2195}
2196EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2197
2198void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2199 struct sk_buff *skb)
2200{
2201 struct audit_buffer *audit_buf;
2202 u32 spi;
2203
2204 audit_buf = xfrm_audit_start("SA-replay-overflow");
2205 if (audit_buf == NULL)
2206 return;
2207 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2208 /* don't record the sequence number because it's inherent in this kind
2209 * of audit message */
2210 spi = ntohl(x->id.spi);
2211 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2212 audit_log_end(audit_buf);
2213}
2214EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2215
2216static void xfrm_audit_state_replay(struct xfrm_state *x,
2217 struct sk_buff *skb, __be32 net_seq)
2218{
2219 struct audit_buffer *audit_buf;
2220 u32 spi;
2221
2222 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2223 if (audit_buf == NULL)
2224 return;
2225 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2226 spi = ntohl(x->id.spi);
2227 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2228 spi, spi, ntohl(net_seq));
2229 audit_log_end(audit_buf);
2230}
2231
2232void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2233{
2234 struct audit_buffer *audit_buf;
2235
2236 audit_buf = xfrm_audit_start("SA-notfound");
2237 if (audit_buf == NULL)
2238 return;
2239 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2240 audit_log_end(audit_buf);
2241}
2242EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2243
2244void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2245 __be32 net_spi, __be32 net_seq)
2246{
2247 struct audit_buffer *audit_buf;
2248 u32 spi;
2249
2250 audit_buf = xfrm_audit_start("SA-notfound");
2251 if (audit_buf == NULL)
2252 return;
2253 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2254 spi = ntohl(net_spi);
2255 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2256 spi, spi, ntohl(net_seq));
2257 audit_log_end(audit_buf);
2258}
2259EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2260
2261void xfrm_audit_state_icvfail(struct xfrm_state *x,
2262 struct sk_buff *skb, u8 proto)
2263{
2264 struct audit_buffer *audit_buf;
2265 __be32 net_spi;
2266 __be32 net_seq;
2267
2268 audit_buf = xfrm_audit_start("SA-icv-failure");
2269 if (audit_buf == NULL)
2270 return;
2271 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2272 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2273 u32 spi = ntohl(net_spi);
2274 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2275 spi, spi, ntohl(net_seq));
2276 }
2277 audit_log_end(audit_buf);
2278}
2279EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2280#endif /* CONFIG_AUDITSYSCALL */
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