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net/compat_ioctl: support SIOCWANDEV
[deliverable/linux.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>
1da177e4 24
44e36b42
DM		 25#include "xfrm_hash.h"
26
1da177e4
LT		 27/* Each xfrm_state may be linked to two tables:
28
29 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 30 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 31 destination/tunnel endpoint. (output)
32 */
33
34static DEFINE_SPINLOCK(xfrm_state_lock);
35
f034b5d4 36static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
9d4a706d 37static unsigned int xfrm_state_genid;
f034b5d4 38
17c2a42a
HX		 39static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
40static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
41
afeb14b4
PM		 42#ifdef CONFIG_AUDITSYSCALL
43static void xfrm_audit_state_replay(struct xfrm_state *x,
44 struct sk_buff *skb, __be32 net_seq);
45#else
46#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
47#endif /* CONFIG_AUDITSYSCALL */
48
64d0cd00
AD		 49static inline unsigned int xfrm_dst_hash(struct net *net,
50 xfrm_address_t *daddr,
c1969f29
DM		 51 xfrm_address_t *saddr,
52 u32 reqid,
a624c108 53 unsigned short family)
f034b5d4 54{
64d0cd00 55 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 56}
57
64d0cd00
AD		 58static inline unsigned int xfrm_src_hash(struct net *net,
59 xfrm_address_t *daddr,
667bbcb6 60 xfrm_address_t *saddr,
44e36b42 61 unsigned short family)
f034b5d4 62{
64d0cd00 63 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 64}
65
f034b5d4 66static inline unsigned int
64d0cd00 67xfrm_spi_hash(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
f034b5d4 68{
64d0cd00 69 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 70}
71
f034b5d4
DM		 72static void xfrm_hash_transfer(struct hlist_head *list,
73 struct hlist_head *ndsttable,
74 struct hlist_head *nsrctable,
75 struct hlist_head *nspitable,
76 unsigned int nhashmask)
77{
78 struct hlist_node *entry, *tmp;
79 struct xfrm_state *x;
80
81 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
82 unsigned int h;
83
c1969f29
DM		 84 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
85 x->props.reqid, x->props.family,
86 nhashmask);
f034b5d4
DM		 87 hlist_add_head(&x->bydst, ndsttable+h);
88
667bbcb6
MN		 89 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
90 x->props.family,
f034b5d4
DM		 91 nhashmask);
92 hlist_add_head(&x->bysrc, nsrctable+h);
93
7b4dc360
MN		 94 if (x->id.spi) {
95 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
96 x->id.proto, x->props.family,
97 nhashmask);
98 hlist_add_head(&x->byspi, nspitable+h);
99 }
f034b5d4
DM		 100 }
101}
102
63082733 103static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 104{
63082733 105 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 106}
107
108static DEFINE_MUTEX(hash_resize_mutex);
109
63082733 110static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 111{
63082733 112 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 113 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
114 unsigned long nsize, osize;
115 unsigned int nhashmask, ohashmask;
116 int i;
117
118 mutex_lock(&hash_resize_mutex);
119
63082733 120 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 121 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 122 if (!ndst)
123 goto out_unlock;
44e36b42 124 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 125 if (!nsrc) {
44e36b42 126 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 127 goto out_unlock;
128 }
44e36b42 129 nspi = xfrm_hash_alloc(nsize);
f034b5d4 130 if (!nspi) {
44e36b42
DM		 131 xfrm_hash_free(ndst, nsize);
132 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 133 goto out_unlock;
134 }
135
136 spin_lock_bh(&xfrm_state_lock);
137
138 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 139 for (i = net->xfrm.state_hmask; i >= 0; i--)
140 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 141 nhashmask);
142
63082733
AD		 143 odst = net->xfrm.state_bydst;
144 osrc = net->xfrm.state_bysrc;
145 ospi = net->xfrm.state_byspi;
146 ohashmask = net->xfrm.state_hmask;
f034b5d4 147
63082733
AD		 148 net->xfrm.state_bydst = ndst;
149 net->xfrm.state_bysrc = nsrc;
150 net->xfrm.state_byspi = nspi;
151 net->xfrm.state_hmask = nhashmask;
f034b5d4
DM		 152
153 spin_unlock_bh(&xfrm_state_lock);
154
155 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 156 xfrm_hash_free(odst, osize);
157 xfrm_hash_free(osrc, osize);
158 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 159
160out_unlock:
161 mutex_unlock(&hash_resize_mutex);
162}
163
1da177e4
LT		 164static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
165static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
166
1da177e4
LT		 167static DEFINE_SPINLOCK(xfrm_state_gc_lock);
168
53bc6b4d 169int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 170
980ebd25 171int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
53bc6b4d 172void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
1da177e4 173
aa5d62cc
HX		 174static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
175{
176 struct xfrm_state_afinfo *afinfo;
177 if (unlikely(family >= NPROTO))
178 return NULL;
179 write_lock_bh(&xfrm_state_afinfo_lock);
180 afinfo = xfrm_state_afinfo[family];
181 if (unlikely(!afinfo))
182 write_unlock_bh(&xfrm_state_afinfo_lock);
183 return afinfo;
184}
185
186static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 187 __releases(xfrm_state_afinfo_lock)
aa5d62cc
HX		 188{
189 write_unlock_bh(&xfrm_state_afinfo_lock);
190}
191
533cb5b0 192int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 193{
194 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 195 const struct xfrm_type **typemap;
aa5d62cc
HX		 196 int err = 0;
197
198 if (unlikely(afinfo == NULL))
199 return -EAFNOSUPPORT;
200 typemap = afinfo->type_map;
201
202 if (likely(typemap[type->proto] == NULL))
203 typemap[type->proto] = type;
204 else
205 err = -EEXIST;
206 xfrm_state_unlock_afinfo(afinfo);
207 return err;
208}
209EXPORT_SYMBOL(xfrm_register_type);
210
533cb5b0 211int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 212{
213 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 214 const struct xfrm_type **typemap;
aa5d62cc
HX		 215 int err = 0;
216
217 if (unlikely(afinfo == NULL))
218 return -EAFNOSUPPORT;
219 typemap = afinfo->type_map;
220
221 if (unlikely(typemap[type->proto] != type))
222 err = -ENOENT;
223 else
224 typemap[type->proto] = NULL;
225 xfrm_state_unlock_afinfo(afinfo);
226 return err;
227}
228EXPORT_SYMBOL(xfrm_unregister_type);
229
533cb5b0 230static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 231{
232 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 233 const struct xfrm_type **typemap;
234 const struct xfrm_type *type;
aa5d62cc
HX		 235 int modload_attempted = 0;
236
237retry:
238 afinfo = xfrm_state_get_afinfo(family);
239 if (unlikely(afinfo == NULL))
240 return NULL;
241 typemap = afinfo->type_map;
242
243 type = typemap[proto];
244 if (unlikely(type && !try_module_get(type->owner)))
245 type = NULL;
246 if (!type && !modload_attempted) {
247 xfrm_state_put_afinfo(afinfo);
248 request_module("xfrm-type-%d-%d", family, proto);
249 modload_attempted = 1;
250 goto retry;
251 }
252
253 xfrm_state_put_afinfo(afinfo);
254 return type;
255}
256
533cb5b0 257static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 258{
259 module_put(type->owner);
260}
261
262int xfrm_register_mode(struct xfrm_mode *mode, int family)
263{
264 struct xfrm_state_afinfo *afinfo;
265 struct xfrm_mode **modemap;
266 int err;
267
268 if (unlikely(mode->encap >= XFRM_MODE_MAX))
269 return -EINVAL;
270
271 afinfo = xfrm_state_lock_afinfo(family);
272 if (unlikely(afinfo == NULL))
273 return -EAFNOSUPPORT;
274
275 err = -EEXIST;
276 modemap = afinfo->mode_map;
17c2a42a
HX		 277 if (modemap[mode->encap])
278 goto out;
aa5d62cc 279
17c2a42a
HX		 280 err = -ENOENT;
281 if (!try_module_get(afinfo->owner))
282 goto out;
283
284 mode->afinfo = afinfo;
285 modemap[mode->encap] = mode;
286 err = 0;
287
288out:
aa5d62cc
HX		 289 xfrm_state_unlock_afinfo(afinfo);
290 return err;
291}
292EXPORT_SYMBOL(xfrm_register_mode);
293
294int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
295{
296 struct xfrm_state_afinfo *afinfo;
297 struct xfrm_mode **modemap;
298 int err;
299
300 if (unlikely(mode->encap >= XFRM_MODE_MAX))
301 return -EINVAL;
302
303 afinfo = xfrm_state_lock_afinfo(family);
304 if (unlikely(afinfo == NULL))
305 return -EAFNOSUPPORT;
306
307 err = -ENOENT;
308 modemap = afinfo->mode_map;
309 if (likely(modemap[mode->encap] == mode)) {
310 modemap[mode->encap] = NULL;
17c2a42a 311 module_put(mode->afinfo->owner);
aa5d62cc
HX		 312 err = 0;
313 }
314
315 xfrm_state_unlock_afinfo(afinfo);
316 return err;
317}
318EXPORT_SYMBOL(xfrm_unregister_mode);
319
320static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
321{
322 struct xfrm_state_afinfo *afinfo;
323 struct xfrm_mode *mode;
324 int modload_attempted = 0;
325
326 if (unlikely(encap >= XFRM_MODE_MAX))
327 return NULL;
328
329retry:
330 afinfo = xfrm_state_get_afinfo(family);
331 if (unlikely(afinfo == NULL))
332 return NULL;
333
334 mode = afinfo->mode_map[encap];
335 if (unlikely(mode && !try_module_get(mode->owner)))
336 mode = NULL;
337 if (!mode && !modload_attempted) {
338 xfrm_state_put_afinfo(afinfo);
339 request_module("xfrm-mode-%d-%d", family, encap);
340 modload_attempted = 1;
341 goto retry;
342 }
343
344 xfrm_state_put_afinfo(afinfo);
345 return mode;
346}
347
348static void xfrm_put_mode(struct xfrm_mode *mode)
349{
350 module_put(mode->owner);
351}
352
1da177e4
LT		 353static void xfrm_state_gc_destroy(struct xfrm_state *x)
354{
a47f0ce0
DM		 355 del_timer_sync(&x->timer);
356 del_timer_sync(&x->rtimer);
a51482bd
JJ		 357 kfree(x->aalg);
358 kfree(x->ealg);
359 kfree(x->calg);
360 kfree(x->encap);
060f02a3 361 kfree(x->coaddr);
13996378
HX		 362 if (x->inner_mode)
363 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 364 if (x->inner_mode_iaf)
365 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 366 if (x->outer_mode)
367 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 368 if (x->type) {
369 x->type->destructor(x);
370 xfrm_put_type(x->type);
371 }
df71837d 372 security_xfrm_state_free(x);
1da177e4
LT		 373 kfree(x);
374}
375
c7837144 376static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 377{
c7837144 378 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7
HX		 379 struct xfrm_state *x;
380 struct hlist_node *entry, *tmp;
381 struct hlist_head gc_list;
1da177e4 382
1da177e4 383 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 384 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 385 spin_unlock_bh(&xfrm_state_gc_lock);
386
12a169e7 387 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
1da177e4 388 xfrm_state_gc_destroy(x);
8f126e37 389
50a30657 390 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 391}
392
393static inline unsigned long make_jiffies(long secs)
394{
395 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
396 return MAX_SCHEDULE_TIMEOUT-1;
397 else
a716c119 398 return secs*HZ;
1da177e4
LT		 399}
400
401static void xfrm_timer_handler(unsigned long data)
402{
403 struct xfrm_state *x = (struct xfrm_state*)data;
98806f75 404 struct net *net = xs_net(x);
9d729f72 405 unsigned long now = get_seconds();
1da177e4
LT		 406 long next = LONG_MAX;
407 int warn = 0;
161a09e7 408 int err = 0;
1da177e4
LT		 409
410 spin_lock(&x->lock);
411 if (x->km.state == XFRM_STATE_DEAD)
412 goto out;
413 if (x->km.state == XFRM_STATE_EXPIRED)
414 goto expired;
415 if (x->lft.hard_add_expires_seconds) {
416 long tmo = x->lft.hard_add_expires_seconds +
417 x->curlft.add_time - now;
418 if (tmo <= 0)
419 goto expired;
420 if (tmo < next)
421 next = tmo;
422 }
423 if (x->lft.hard_use_expires_seconds) {
424 long tmo = x->lft.hard_use_expires_seconds +
425 (x->curlft.use_time ? : now) - now;
426 if (tmo <= 0)
427 goto expired;
428 if (tmo < next)
429 next = tmo;
430 }
431 if (x->km.dying)
432 goto resched;
433 if (x->lft.soft_add_expires_seconds) {
434 long tmo = x->lft.soft_add_expires_seconds +
435 x->curlft.add_time - now;
436 if (tmo <= 0)
437 warn = 1;
438 else if (tmo < next)
439 next = tmo;
440 }
441 if (x->lft.soft_use_expires_seconds) {
442 long tmo = x->lft.soft_use_expires_seconds +
443 (x->curlft.use_time ? : now) - now;
444 if (tmo <= 0)
445 warn = 1;
446 else if (tmo < next)
447 next = tmo;
448 }
449
4666faab 450 x->km.dying = warn;
1da177e4 451 if (warn)
53bc6b4d 452 km_state_expired(x, 0, 0);
1da177e4 453resched:
a47f0ce0
DM		 454 if (next != LONG_MAX)
455 mod_timer(&x->timer, jiffies + make_jiffies(next));
456
1da177e4
LT		 457 goto out;
458
459expired:
460 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
461 x->km.state = XFRM_STATE_EXPIRED;
98806f75 462 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 463 next = 2;
464 goto resched;
465 }
161a09e7
JL		 466
467 err = __xfrm_state_delete(x);
468 if (!err && x->id.spi)
53bc6b4d 469 km_state_expired(x, 1, 0);
1da177e4 470
ab5f5e8b 471 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 472 audit_get_loginuid(current),
473 audit_get_sessionid(current), 0);
161a09e7 474
1da177e4
LT		 475out:
476 spin_unlock(&x->lock);
1da177e4
LT		 477}
478
0ac84752
DM		 479static void xfrm_replay_timer_handler(unsigned long data);
480
673c09be 481struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 482{
483 struct xfrm_state *x;
484
0da974f4 485 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 486
487 if (x) {
673c09be 488 write_pnet(&x->xs_net, net);
1da177e4
LT		 489 atomic_set(&x->refcnt, 1);
490 atomic_set(&x->tunnel_users, 0);
12a169e7 491 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 492 INIT_HLIST_NODE(&x->bydst);
493 INIT_HLIST_NODE(&x->bysrc);
494 INIT_HLIST_NODE(&x->byspi);
b24b8a24
PE		 495 setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x);
496 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
497 (unsigned long)x);
9d729f72 498 x->curlft.add_time = get_seconds();
1da177e4
LT		 499 x->lft.soft_byte_limit = XFRM_INF;
500 x->lft.soft_packet_limit = XFRM_INF;
501 x->lft.hard_byte_limit = XFRM_INF;
502 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 503 x->replay_maxage = 0;
504 x->replay_maxdiff = 0;
df9dcb45
KM		 505 x->inner_mode = NULL;
506 x->inner_mode_iaf = NULL;
1da177e4
LT		 507 spin_lock_init(&x->lock);
508 }
509 return x;
510}
511EXPORT_SYMBOL(xfrm_state_alloc);
512
513void __xfrm_state_destroy(struct xfrm_state *x)
514{
98806f75
AD		 515 struct net *net = xs_net(x);
516
547b792c 517 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 518
519 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 520 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 521 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 522 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 523}
524EXPORT_SYMBOL(__xfrm_state_destroy);
525
53bc6b4d 526int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 527{
98806f75 528 struct net *net = xs_net(x);
26b15dad
JHS		 529 int err = -ESRCH;
530
1da177e4
LT		 531 if (x->km.state != XFRM_STATE_DEAD) {
532 x->km.state = XFRM_STATE_DEAD;
533 spin_lock(&xfrm_state_lock);
12a169e7 534 list_del(&x->km.all);
8f126e37 535 hlist_del(&x->bydst);
8f126e37 536 hlist_del(&x->bysrc);
a47f0ce0 537 if (x->id.spi)
8f126e37 538 hlist_del(&x->byspi);
98806f75 539 net->xfrm.state_num--;
1da177e4 540 spin_unlock(&xfrm_state_lock);
1da177e4 541
1da177e4
LT		 542 /* All xfrm_state objects are created by xfrm_state_alloc.
543 * The xfrm_state_alloc call gives a reference, and that
544 * is what we are dropping here.
545 */
5dba4797 546 xfrm_state_put(x);
26b15dad 547 err = 0;
1da177e4 548 }
26b15dad
JHS		 549
550 return err;
1da177e4 551}
53bc6b4d 552EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 553
26b15dad 554int xfrm_state_delete(struct xfrm_state *x)
1da177e4 555{
26b15dad
JHS		 556 int err;
557
1da177e4 558 spin_lock_bh(&x->lock);
26b15dad 559 err = __xfrm_state_delete(x);
1da177e4 560 spin_unlock_bh(&x->lock);
26b15dad
JHS		 561
562 return err;
1da177e4
LT		 563}
564EXPORT_SYMBOL(xfrm_state_delete);
565
4aa2e62c
JL		 566#ifdef CONFIG_SECURITY_NETWORK_XFRM
567static inline int
0e602451 568xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 569{
4aa2e62c
JL		 570 int i, err = 0;
571
0e602451 572 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 573 struct hlist_node *entry;
574 struct xfrm_state *x;
575
0e602451 576 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 577 if (xfrm_id_proto_match(x->id.proto, proto) &&
578 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 579 xfrm_audit_state_delete(x, 0,
580 audit_info->loginuid,
2532386f 581 audit_info->sessionid,
ab5f5e8b 582 audit_info->secid);
4aa2e62c
JL		 583 return err;
584 }
585 }
586 }
587
588 return err;
589}
590#else
591static inline int
0e602451 592xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 593{
594 return 0;
595}
596#endif
597
0e602451 598int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 599{
600 int i, err = 0;
1da177e4
LT		 601
602 spin_lock_bh(&xfrm_state_lock);
0e602451 603 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 604 if (err)
605 goto out;
606
0e602451 607 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 608 struct hlist_node *entry;
609 struct xfrm_state *x;
1da177e4 610restart:
0e602451 611 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1da177e4 612 if (!xfrm_state_kern(x) &&
5794708f 613 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4
LT		 614 xfrm_state_hold(x);
615 spin_unlock_bh(&xfrm_state_lock);
616
161a09e7 617 err = xfrm_state_delete(x);
ab5f5e8b
JL		 618 xfrm_audit_state_delete(x, err ? 0 : 1,
619 audit_info->loginuid,
2532386f 620 audit_info->sessionid,
ab5f5e8b 621 audit_info->secid);
1da177e4
LT		 622 xfrm_state_put(x);
623
624 spin_lock_bh(&xfrm_state_lock);
625 goto restart;
626 }
627 }
628 }
4aa2e62c
JL		 629 err = 0;
630
631out:
1da177e4 632 spin_unlock_bh(&xfrm_state_lock);
0e602451 633 wake_up(&net->xfrm.km_waitq);
4aa2e62c 634 return err;
1da177e4
LT		 635}
636EXPORT_SYMBOL(xfrm_state_flush);
637
af11e316 638void xfrm_sad_getinfo(struct xfrmk_sadinfo *si)
28d8909b
JHS		 639{
640 spin_lock_bh(&xfrm_state_lock);
0bf7c5b0 641 si->sadcnt = init_net.xfrm.state_num;
529983ec 642 si->sadhcnt = init_net.xfrm.state_hmask;
28d8909b
JHS		 643 si->sadhmcnt = xfrm_state_hashmax;
644 spin_unlock_bh(&xfrm_state_lock);
645}
646EXPORT_SYMBOL(xfrm_sad_getinfo);
647
1da177e4
LT		 648static int
649xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
650 struct xfrm_tmpl *tmpl,
651 xfrm_address_t *daddr, xfrm_address_t *saddr,
652 unsigned short family)
653{
654 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
655 if (!afinfo)
656 return -1;
657 afinfo->init_tempsel(x, fl, tmpl, daddr, saddr);
658 xfrm_state_put_afinfo(afinfo);
659 return 0;
660}
661
221df1ed 662static struct xfrm_state *__xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
edcd5821 663{
221df1ed 664 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821 665 struct xfrm_state *x;
8f126e37 666 struct hlist_node *entry;
edcd5821 667
221df1ed 668 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 669 if (x->props.family != family ||
670 x->id.spi != spi ||
1802571b
WY		 671 x->id.proto != proto ||
672 xfrm_addr_cmp(&x->id.daddr, daddr, family))
edcd5821
DM		 673 continue;
674
edcd5821
DM		 675 xfrm_state_hold(x);
676 return x;
677 }
678
679 return NULL;
680}
681
221df1ed 682static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family)
edcd5821 683{
221df1ed 684 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821 685 struct xfrm_state *x;
8f126e37 686 struct hlist_node *entry;
edcd5821 687
221df1ed 688 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 689 if (x->props.family != family ||
1802571b
WY		 690 x->id.proto != proto ||
691 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
692 xfrm_addr_cmp(&x->props.saddr, saddr, family))
edcd5821
DM		 693 continue;
694
edcd5821
DM		 695 xfrm_state_hold(x);
696 return x;
697 }
698
699 return NULL;
700}
701
702static inline struct xfrm_state *
703__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
704{
221df1ed
AD		 705 struct net *net = xs_net(x);
706
edcd5821 707 if (use_spi)
221df1ed 708 return __xfrm_state_lookup(net, &x->id.daddr, x->id.spi,
edcd5821
DM		 709 x->id.proto, family);
710 else
221df1ed 711 return __xfrm_state_lookup_byaddr(net, &x->id.daddr,
edcd5821
DM		 712 &x->props.saddr,
713 x->id.proto, family);
714}
715
98806f75 716static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 717{
718 if (have_hash_collision &&
98806f75
AD		 719 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
720 net->xfrm.state_num > net->xfrm.state_hmask)
721 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 722}
723
08ec9af1
DM		 724static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
725 struct flowi *fl, unsigned short family,
726 xfrm_address_t *daddr, xfrm_address_t *saddr,
727 struct xfrm_state **best, int *acq_in_progress,
728 int *error)
729{
730 /* Resolution logic:
731 * 1. There is a valid state with matching selector. Done.
732 * 2. Valid state with inappropriate selector. Skip.
733 *
734 * Entering area of "sysdeps".
735 *
736 * 3. If state is not valid, selector is temporary, it selects
737 * only session which triggered previous resolution. Key
738 * manager will do something to install a state with proper
739 * selector.
740 */
741 if (x->km.state == XFRM_STATE_VALID) {
742 if ((x->sel.family &&
743 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
744 !security_xfrm_state_pol_flow_match(x, pol, fl))
745 return;
746
747 if (!*best ||
748 (*best)->km.dying > x->km.dying ||
749 ((*best)->km.dying == x->km.dying &&
750 (*best)->curlft.add_time < x->curlft.add_time))
751 *best = x;
752 } else if (x->km.state == XFRM_STATE_ACQ) {
753 *acq_in_progress = 1;
754 } else if (x->km.state == XFRM_STATE_ERROR ||
755 x->km.state == XFRM_STATE_EXPIRED) {
756 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
757 security_xfrm_state_pol_flow_match(x, pol, fl))
758 *error = -ESRCH;
759 }
760}
761
1da177e4 762struct xfrm_state *
a716c119 763xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 764 struct flowi *fl, struct xfrm_tmpl *tmpl,
765 struct xfrm_policy *pol, int *err,
766 unsigned short family)
767{
08ec9af1 768 static xfrm_address_t saddr_wildcard = { };
5447c5e4 769 struct net *net = xp_net(pol);
6a783c90 770 unsigned int h, h_wildcard;
8f126e37 771 struct hlist_node *entry;
37b08e34 772 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 773 int acquire_in_progress = 0;
774 int error = 0;
775 struct xfrm_state *best = NULL;
a716c119 776
37b08e34
DM		 777 to_put = NULL;
778
1da177e4 779 spin_lock_bh(&xfrm_state_lock);
5447c5e4
AD		 780 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, family);
781 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
1da177e4
LT		 782 if (x->props.family == family &&
783 x->props.reqid == tmpl->reqid &&
fbd9a5b4 784 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1da177e4
LT		 785 xfrm_state_addr_check(x, daddr, saddr, family) &&
786 tmpl->mode == x->props.mode &&
787 tmpl->id.proto == x->id.proto &&
08ec9af1
DM		 788 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
789 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
790 &best, &acquire_in_progress, &error);
791 }
792 if (best)
793 goto found;
794
6a783c90
ND		 795 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, family);
796 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
08ec9af1
DM		 797 if (x->props.family == family &&
798 x->props.reqid == tmpl->reqid &&
799 !(x->props.flags & XFRM_STATE_WILDRECV) &&
800 xfrm_state_addr_check(x, daddr, saddr, family) &&
801 tmpl->mode == x->props.mode &&
802 tmpl->id.proto == x->id.proto &&
803 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
804 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
805 &best, &acquire_in_progress, &error);
1da177e4
LT		 806 }
807
08ec9af1 808found:
1da177e4
LT		 809 x = best;
810 if (!x && !error && !acquire_in_progress) {
5c5d281a 811 if (tmpl->id.spi &&
5447c5e4 812 (x0 = __xfrm_state_lookup(net, daddr, tmpl->id.spi,
edcd5821 813 tmpl->id.proto, family)) != NULL) {
37b08e34 814 to_put = x0;
1da177e4
LT		 815 error = -EEXIST;
816 goto out;
817 }
5447c5e4 818 x = xfrm_state_alloc(net);
1da177e4
LT		 819 if (x == NULL) {
820 error = -ENOMEM;
821 goto out;
822 }
823 /* Initialize temporary selector matching only
824 * to current session. */
825 xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
826
e0d1caa7
VY		 827 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
828 if (error) {
829 x->km.state = XFRM_STATE_DEAD;
37b08e34 830 to_put = x;
e0d1caa7
VY		 831 x = NULL;
832 goto out;
833 }
834
1da177e4
LT		 835 if (km_query(x, tmpl, pol) == 0) {
836 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 837 list_add(&x->km.all, &net->xfrm.state_all);
838 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
839 h = xfrm_src_hash(net, daddr, saddr, family);
840 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 841 if (x->id.spi) {
5447c5e4
AD		 842 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, family);
843 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 844 }
b27aeadb
AD		 845 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
846 x->timer.expires = jiffies + net->xfrm.sysctl_acq_expires*HZ;
1da177e4 847 add_timer(&x->timer);
5447c5e4
AD		 848 net->xfrm.state_num++;
849 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 850 } else {
851 x->km.state = XFRM_STATE_DEAD;
37b08e34 852 to_put = x;
1da177e4
LT		 853 x = NULL;
854 error = -ESRCH;
855 }
856 }
857out:
858 if (x)
859 xfrm_state_hold(x);
860 else
861 *err = acquire_in_progress ? -EAGAIN : error;
862 spin_unlock_bh(&xfrm_state_lock);
37b08e34
DM		 863 if (to_put)
864 xfrm_state_put(to_put);
1da177e4
LT		 865 return x;
866}
867
628529b6 868struct xfrm_state *
5447c5e4
AD		 869xfrm_stateonly_find(struct net *net,
870 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 871 unsigned short family, u8 mode, u8 proto, u32 reqid)
872{
4bda4f25 873 unsigned int h;
628529b6
JHS		 874 struct xfrm_state *rx = NULL, *x = NULL;
875 struct hlist_node *entry;
876
877 spin_lock(&xfrm_state_lock);
5447c5e4
AD		 878 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
879 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 880 if (x->props.family == family &&
881 x->props.reqid == reqid &&
882 !(x->props.flags & XFRM_STATE_WILDRECV) &&
883 xfrm_state_addr_check(x, daddr, saddr, family) &&
884 mode == x->props.mode &&
885 proto == x->id.proto &&
886 x->km.state == XFRM_STATE_VALID) {
887 rx = x;
888 break;
889 }
890 }
891
892 if (rx)
893 xfrm_state_hold(rx);
894 spin_unlock(&xfrm_state_lock);
895
896
897 return rx;
898}
899EXPORT_SYMBOL(xfrm_stateonly_find);
900
1da177e4
LT		 901static void __xfrm_state_insert(struct xfrm_state *x)
902{
98806f75 903 struct net *net = xs_net(x);
a624c108 904 unsigned int h;
1da177e4 905
9d4a706d
DM		 906 x->genid = ++xfrm_state_genid;
907
98806f75 908 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 909
98806f75 910 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 911 x->props.reqid, x->props.family);
98806f75 912 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 913
98806f75
AD		 914 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
915 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 916
7b4dc360 917 if (x->id.spi) {
98806f75 918 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 919 x->props.family);
920
98806f75 921 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 922 }
923
a47f0ce0
DM		 924 mod_timer(&x->timer, jiffies + HZ);
925 if (x->replay_maxage)
926 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 927
98806f75 928 wake_up(&net->xfrm.km_waitq);
f034b5d4 929
98806f75 930 net->xfrm.state_num++;
f034b5d4 931
98806f75 932 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 933}
934
c7f5ea3a
DM		 935/* xfrm_state_lock is held */
936static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
937{
98806f75 938 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 939 unsigned short family = xnew->props.family;
940 u32 reqid = xnew->props.reqid;
941 struct xfrm_state *x;
942 struct hlist_node *entry;
943 unsigned int h;
944
98806f75
AD		 945 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
946 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 947 if (x->props.family == family &&
948 x->props.reqid == reqid &&
c1969f29
DM		 949 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
950 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
c7f5ea3a
DM		 951 x->genid = xfrm_state_genid;
952 }
953}
954
1da177e4
LT		 955void xfrm_state_insert(struct xfrm_state *x)
956{
957 spin_lock_bh(&xfrm_state_lock);
c7f5ea3a 958 __xfrm_state_bump_genids(x);
1da177e4
LT		 959 __xfrm_state_insert(x);
960 spin_unlock_bh(&xfrm_state_lock);
961}
962EXPORT_SYMBOL(xfrm_state_insert);
963
2770834c 964/* xfrm_state_lock is held */
5447c5e4 965static 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 966{
5447c5e4 967 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
8f126e37 968 struct hlist_node *entry;
2770834c
DM		 969 struct xfrm_state *x;
970
5447c5e4 971 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 972 if (x->props.reqid != reqid ||
973 x->props.mode != mode ||
974 x->props.family != family ||
975 x->km.state != XFRM_STATE_ACQ ||
75e252d9 976 x->id.spi != 0 ||
1802571b
WY		 977 x->id.proto != proto ||
978 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
979 xfrm_addr_cmp(&x->props.saddr, saddr, family))
2770834c
DM		 980 continue;
981
2770834c
DM		 982 xfrm_state_hold(x);
983 return x;
984 }
985
986 if (!create)
987 return NULL;
988
5447c5e4 989 x = xfrm_state_alloc(net);
2770834c
DM		 990 if (likely(x)) {
991 switch (family) {
992 case AF_INET:
993 x->sel.daddr.a4 = daddr->a4;
994 x->sel.saddr.a4 = saddr->a4;
995 x->sel.prefixlen_d = 32;
996 x->sel.prefixlen_s = 32;
997 x->props.saddr.a4 = saddr->a4;
998 x->id.daddr.a4 = daddr->a4;
999 break;
1000
1001 case AF_INET6:
1002 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1003 (struct in6_addr *)daddr);
1004 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1005 (struct in6_addr *)saddr);
1006 x->sel.prefixlen_d = 128;
1007 x->sel.prefixlen_s = 128;
1008 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1009 (struct in6_addr *)saddr);
1010 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1011 (struct in6_addr *)daddr);
1012 break;
3ff50b79 1013 }
2770834c
DM		 1014
1015 x->km.state = XFRM_STATE_ACQ;
1016 x->id.proto = proto;
1017 x->props.family = family;
1018 x->props.mode = mode;
1019 x->props.reqid = reqid;
b27aeadb 1020 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1021 xfrm_state_hold(x);
b27aeadb 1022 x->timer.expires = jiffies + net->xfrm.sysctl_acq_expires*HZ;
2770834c 1023 add_timer(&x->timer);
5447c5e4
AD		 1024 list_add(&x->km.all, &net->xfrm.state_all);
1025 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1026 h = xfrm_src_hash(net, daddr, saddr, family);
1027 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1028
5447c5e4 1029 net->xfrm.state_num++;
918049f0 1030
5447c5e4 1031 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1032 }
1033
1034 return x;
1035}
1036
5447c5e4 1037static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 seq);
1da177e4
LT		 1038
1039int xfrm_state_add(struct xfrm_state *x)
1040{
5447c5e4 1041 struct net *net = xs_net(x);
37b08e34 1042 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1043 int family;
1044 int err;
eb2971b6 1045 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1046
1047 family = x->props.family;
1da177e4 1048
37b08e34
DM		 1049 to_put = NULL;
1050
1da177e4
LT		 1051 spin_lock_bh(&xfrm_state_lock);
1052
edcd5821 1053 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1054 if (x1) {
37b08e34 1055 to_put = x1;
1da177e4
LT		 1056 x1 = NULL;
1057 err = -EEXIST;
1058 goto out;
1059 }
1060
eb2971b6 1061 if (use_spi && x->km.seq) {
5447c5e4 1062 x1 = __xfrm_find_acq_byseq(net, x->km.seq);
75e252d9
JL		 1063 if (x1 && ((x1->id.proto != x->id.proto) ||
1064 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1065 to_put = x1;
1da177e4
LT		 1066 x1 = NULL;
1067 }
1068 }
1069
eb2971b6 1070 if (use_spi && !x1)
5447c5e4 1071 x1 = __find_acq_core(net, family, x->props.mode, x->props.reqid,
2770834c
DM		 1072 x->id.proto,
1073 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1074
c7f5ea3a 1075 __xfrm_state_bump_genids(x);
1da177e4
LT		 1076 __xfrm_state_insert(x);
1077 err = 0;
1078
1079out:
1080 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1081
1082 if (x1) {
1083 xfrm_state_delete(x1);
1084 xfrm_state_put(x1);
1085 }
1086
37b08e34
DM		 1087 if (to_put)
1088 xfrm_state_put(to_put);
1089
1da177e4
LT		 1090 return err;
1091}
1092EXPORT_SYMBOL(xfrm_state_add);
1093
80c9abaa 1094#ifdef CONFIG_XFRM_MIGRATE
6666351d 1095static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1096{
98806f75 1097 struct net *net = xs_net(orig);
80c9abaa 1098 int err = -ENOMEM;
98806f75 1099 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa
SS		 1100 if (!x)
1101 goto error;
1102
1103 memcpy(&x->id, &orig->id, sizeof(x->id));
1104 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1105 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1106 x->props.mode = orig->props.mode;
1107 x->props.replay_window = orig->props.replay_window;
1108 x->props.reqid = orig->props.reqid;
1109 x->props.family = orig->props.family;
1110 x->props.saddr = orig->props.saddr;
1111
1112 if (orig->aalg) {
1113 x->aalg = xfrm_algo_clone(orig->aalg);
1114 if (!x->aalg)
1115 goto error;
1116 }
1117 x->props.aalgo = orig->props.aalgo;
1118
1119 if (orig->ealg) {
1120 x->ealg = xfrm_algo_clone(orig->ealg);
1121 if (!x->ealg)
1122 goto error;
1123 }
1124 x->props.ealgo = orig->props.ealgo;
1125
1126 if (orig->calg) {
1127 x->calg = xfrm_algo_clone(orig->calg);
1128 if (!x->calg)
1129 goto error;
1130 }
1131 x->props.calgo = orig->props.calgo;
1132
a716c119 1133 if (orig->encap) {
80c9abaa
SS		 1134 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1135 if (!x->encap)
1136 goto error;
1137 }
1138
1139 if (orig->coaddr) {
1140 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1141 GFP_KERNEL);
1142 if (!x->coaddr)
1143 goto error;
1144 }
1145
1146 err = xfrm_init_state(x);
1147 if (err)
1148 goto error;
1149
1150 x->props.flags = orig->props.flags;
1151
1152 x->curlft.add_time = orig->curlft.add_time;
1153 x->km.state = orig->km.state;
1154 x->km.seq = orig->km.seq;
1155
1156 return x;
1157
1158 error:
1159 if (errp)
1160 *errp = err;
1161 if (x) {
1162 kfree(x->aalg);
1163 kfree(x->ealg);
1164 kfree(x->calg);
1165 kfree(x->encap);
1166 kfree(x->coaddr);
1167 }
1168 kfree(x);
1169 return NULL;
1170}
80c9abaa
SS		 1171
1172/* xfrm_state_lock is held */
1173struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1174{
1175 unsigned int h;
1176 struct xfrm_state *x;
1177 struct hlist_node *entry;
1178
1179 if (m->reqid) {
64d0cd00 1180 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1181 m->reqid, m->old_family);
73d189dc 1182 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1183 if (x->props.mode != m->mode ||
1184 x->id.proto != m->proto)
1185 continue;
1186 if (m->reqid && x->props.reqid != m->reqid)
1187 continue;
1188 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1189 m->old_family) ||
1190 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1191 m->old_family))
1192 continue;
1193 xfrm_state_hold(x);
1194 return x;
1195 }
1196 } else {
64d0cd00 1197 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1198 m->old_family);
d320bbb3 1199 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1200 if (x->props.mode != m->mode ||
1201 x->id.proto != m->proto)
1202 continue;
1203 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1204 m->old_family) ||
1205 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1206 m->old_family))
1207 continue;
1208 xfrm_state_hold(x);
1209 return x;
1210 }
1211 }
1212
a716c119 1213 return NULL;
80c9abaa
SS		 1214}
1215EXPORT_SYMBOL(xfrm_migrate_state_find);
1216
1217struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1218 struct xfrm_migrate *m)
1219{
1220 struct xfrm_state *xc;
1221 int err;
1222
1223 xc = xfrm_state_clone(x, &err);
1224 if (!xc)
1225 return NULL;
1226
1227 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1228 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1229
1230 /* add state */
1231 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1232 /* a care is needed when the destination address of the
1233 state is to be updated as it is a part of triplet */
1234 xfrm_state_insert(xc);
1235 } else {
1236 if ((err = xfrm_state_add(xc)) < 0)
1237 goto error;
1238 }
1239
1240 return xc;
1241error:
1242 kfree(xc);
1243 return NULL;
1244}
1245EXPORT_SYMBOL(xfrm_state_migrate);
1246#endif
1247
1da177e4
LT		 1248int xfrm_state_update(struct xfrm_state *x)
1249{
37b08e34 1250 struct xfrm_state *x1, *to_put;
1da177e4 1251 int err;
eb2971b6 1252 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4 1253
37b08e34
DM		 1254 to_put = NULL;
1255
1da177e4 1256 spin_lock_bh(&xfrm_state_lock);
edcd5821 1257 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1258
1259 err = -ESRCH;
1260 if (!x1)
1261 goto out;
1262
1263 if (xfrm_state_kern(x1)) {
37b08e34 1264 to_put = x1;
1da177e4
LT		 1265 err = -EEXIST;
1266 goto out;
1267 }
1268
1269 if (x1->km.state == XFRM_STATE_ACQ) {
1270 __xfrm_state_insert(x);
1271 x = NULL;
1272 }
1273 err = 0;
1274
1275out:
1276 spin_unlock_bh(&xfrm_state_lock);
1da177e4 1277
37b08e34
DM		 1278 if (to_put)
1279 xfrm_state_put(to_put);
1280
1da177e4
LT		 1281 if (err)
1282 return err;
1283
1284 if (!x) {
1285 xfrm_state_delete(x1);
1286 xfrm_state_put(x1);
1287 return 0;
1288 }
1289
1290 err = -EINVAL;
1291 spin_lock_bh(&x1->lock);
1292 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1293 if (x->encap && x1->encap)
1294 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1295 if (x->coaddr && x1->coaddr) {
1296 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1297 }
1298 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1299 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1300 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1301 x1->km.dying = 0;
1302
a47f0ce0 1303 mod_timer(&x1->timer, jiffies + HZ);
1da177e4
LT		 1304 if (x1->curlft.use_time)
1305 xfrm_state_check_expire(x1);
1306
1307 err = 0;
1308 }
1309 spin_unlock_bh(&x1->lock);
1310
1311 xfrm_state_put(x1);
1312
1313 return err;
1314}
1315EXPORT_SYMBOL(xfrm_state_update);
1316
1317int xfrm_state_check_expire(struct xfrm_state *x)
1318{
1319 if (!x->curlft.use_time)
9d729f72 1320 x->curlft.use_time = get_seconds();
1da177e4
LT		 1321
1322 if (x->km.state != XFRM_STATE_VALID)
1323 return -EINVAL;
1324
1325 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1326 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1327 x->km.state = XFRM_STATE_EXPIRED;
a47f0ce0 1328 mod_timer(&x->timer, jiffies);
1da177e4
LT		 1329 return -EINVAL;
1330 }
1331
1332 if (!x->km.dying &&
1333 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1334 x->curlft.packets >= x->lft.soft_packet_limit)) {
1335 x->km.dying = 1;
53bc6b4d 1336 km_state_expired(x, 0, 0);
4666faab 1337 }
1da177e4
LT		 1338 return 0;
1339}
1340EXPORT_SYMBOL(xfrm_state_check_expire);
1341
1da177e4 1342struct xfrm_state *
221df1ed 1343xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto,
1da177e4
LT		 1344 unsigned short family)
1345{
1346 struct xfrm_state *x;
1da177e4
LT		 1347
1348 spin_lock_bh(&xfrm_state_lock);
221df1ed 1349 x = __xfrm_state_lookup(net, daddr, spi, proto, family);
1da177e4 1350 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1351 return x;
1352}
1353EXPORT_SYMBOL(xfrm_state_lookup);
1354
1355struct xfrm_state *
221df1ed
AD		 1356xfrm_state_lookup_byaddr(struct net *net,
1357 xfrm_address_t *daddr, xfrm_address_t *saddr,
eb2971b6
MN		 1358 u8 proto, unsigned short family)
1359{
1360 struct xfrm_state *x;
eb2971b6
MN		 1361
1362 spin_lock_bh(&xfrm_state_lock);
221df1ed 1363 x = __xfrm_state_lookup_byaddr(net, daddr, saddr, proto, family);
eb2971b6 1364 spin_unlock_bh(&xfrm_state_lock);
eb2971b6
MN		 1365 return x;
1366}
1367EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1368
1369struct xfrm_state *
5447c5e4 1370xfrm_find_acq(struct net *net, u8 mode, u32 reqid, u8 proto,
a716c119 1371 xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 1372 int create, unsigned short family)
1373{
1374 struct xfrm_state *x;
1da177e4
LT		 1375
1376 spin_lock_bh(&xfrm_state_lock);
5447c5e4 1377 x = __find_acq_core(net, family, mode, reqid, proto, daddr, saddr, create);
1da177e4 1378 spin_unlock_bh(&xfrm_state_lock);
2770834c 1379
1da177e4
LT		 1380 return x;
1381}
1382EXPORT_SYMBOL(xfrm_find_acq);
1383
41a49cc3
MN		 1384#ifdef CONFIG_XFRM_SUB_POLICY
1385int
1386xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1387 unsigned short family)
1388{
1389 int err = 0;
1390 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1391 if (!afinfo)
1392 return -EAFNOSUPPORT;
1393
1394 spin_lock_bh(&xfrm_state_lock);
1395 if (afinfo->tmpl_sort)
1396 err = afinfo->tmpl_sort(dst, src, n);
1397 spin_unlock_bh(&xfrm_state_lock);
1398 xfrm_state_put_afinfo(afinfo);
1399 return err;
1400}
1401EXPORT_SYMBOL(xfrm_tmpl_sort);
1402
1403int
1404xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1405 unsigned short family)
1406{
1407 int err = 0;
1408 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1409 if (!afinfo)
1410 return -EAFNOSUPPORT;
1411
1412 spin_lock_bh(&xfrm_state_lock);
1413 if (afinfo->state_sort)
1414 err = afinfo->state_sort(dst, src, n);
1415 spin_unlock_bh(&xfrm_state_lock);
1416 xfrm_state_put_afinfo(afinfo);
1417 return err;
1418}
1419EXPORT_SYMBOL(xfrm_state_sort);
1420#endif
1421
1da177e4
LT		 1422/* Silly enough, but I'm lazy to build resolution list */
1423
5447c5e4 1424static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 seq)
1da177e4
LT		 1425{
1426 int i;
1da177e4 1427
5447c5e4 1428 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1429 struct hlist_node *entry;
1430 struct xfrm_state *x;
1431
5447c5e4 1432 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
8f126e37
DM		 1433 if (x->km.seq == seq &&
1434 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1435 xfrm_state_hold(x);
1436 return x;
1437 }
1438 }
1439 }
1440 return NULL;
1441}
1442
5447c5e4 1443struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 seq)
1da177e4
LT		 1444{
1445 struct xfrm_state *x;
1446
1447 spin_lock_bh(&xfrm_state_lock);
5447c5e4 1448 x = __xfrm_find_acq_byseq(net, seq);
1da177e4
LT		 1449 spin_unlock_bh(&xfrm_state_lock);
1450 return x;
1451}
1452EXPORT_SYMBOL(xfrm_find_acq_byseq);
1453
1454u32 xfrm_get_acqseq(void)
1455{
1456 u32 res;
1457 static u32 acqseq;
1458 static DEFINE_SPINLOCK(acqseq_lock);
1459
1460 spin_lock_bh(&acqseq_lock);
1461 res = (++acqseq ? : ++acqseq);
1462 spin_unlock_bh(&acqseq_lock);
1463 return res;
1464}
1465EXPORT_SYMBOL(xfrm_get_acqseq);
1466
658b219e 1467int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1468{
221df1ed 1469 struct net *net = xs_net(x);
f034b5d4 1470 unsigned int h;
1da177e4 1471 struct xfrm_state *x0;
658b219e
HX		 1472 int err = -ENOENT;
1473 __be32 minspi = htonl(low);
1474 __be32 maxspi = htonl(high);
1da177e4 1475
658b219e
HX		 1476 spin_lock_bh(&x->lock);
1477 if (x->km.state == XFRM_STATE_DEAD)
1478 goto unlock;
1479
1480 err = 0;
1da177e4 1481 if (x->id.spi)
658b219e
HX		 1482 goto unlock;
1483
1484 err = -ENOENT;
1da177e4
LT		 1485
1486 if (minspi == maxspi) {
221df1ed 1487 x0 = xfrm_state_lookup(net, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1488 if (x0) {
1489 xfrm_state_put(x0);
658b219e 1490 goto unlock;
1da177e4
LT		 1491 }
1492 x->id.spi = minspi;
1493 } else {
1494 u32 spi = 0;
26977b4e
AV		 1495 for (h=0; h<high-low+1; h++) {
1496 spi = low + net_random()%(high-low+1);
221df1ed 1497 x0 = xfrm_state_lookup(net, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1498 if (x0 == NULL) {
1499 x->id.spi = htonl(spi);
1500 break;
1501 }
1502 xfrm_state_put(x0);
1503 }
1504 }
1505 if (x->id.spi) {
1506 spin_lock_bh(&xfrm_state_lock);
12604d8a
AD		 1507 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1508 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 1509 spin_unlock_bh(&xfrm_state_lock);
658b219e
HX		 1510
1511 err = 0;
1da177e4 1512 }
658b219e
HX		 1513
1514unlock:
1515 spin_unlock_bh(&x->lock);
1516
1517 return err;
1da177e4
LT		 1518}
1519EXPORT_SYMBOL(xfrm_alloc_spi);
1520
284fa7da 1521int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1522 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1523 void *data)
1524{
12a169e7
HX		 1525 struct xfrm_state *state;
1526 struct xfrm_state_walk *x;
1da177e4
LT		 1527 int err = 0;
1528
12a169e7 1529 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1530 return 0;
1531
1da177e4 1532 spin_lock_bh(&xfrm_state_lock);
12a169e7 1533 if (list_empty(&walk->all))
284fa7da 1534 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1535 else
1536 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1537 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1538 if (x->state == XFRM_STATE_DEAD)
4c563f76 1539 continue;
12a169e7
HX		 1540 state = container_of(x, struct xfrm_state, km);
1541 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1542 continue;
12a169e7
HX		 1543 err = func(state, walk->seq, data);
1544 if (err) {
1545 list_move_tail(&walk->all, &x->all);
1546 goto out;
1da177e4 1547 }
12a169e7 1548 walk->seq++;
1da177e4 1549 }
12a169e7 1550 if (walk->seq == 0) {
1da177e4
LT		 1551 err = -ENOENT;
1552 goto out;
1553 }
12a169e7 1554 list_del_init(&walk->all);
1da177e4
LT		 1555out:
1556 spin_unlock_bh(&xfrm_state_lock);
1557 return err;
1558}
1559EXPORT_SYMBOL(xfrm_state_walk);
1560
5c182458
HX		 1561void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1562{
12a169e7 1563 INIT_LIST_HEAD(&walk->all);
5c182458 1564 walk->proto = proto;
12a169e7
HX		 1565 walk->state = XFRM_STATE_DEAD;
1566 walk->seq = 0;
5c182458
HX		 1567}
1568EXPORT_SYMBOL(xfrm_state_walk_init);
1569
abb81c4f
HX		 1570void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1571{
12a169e7 1572 if (list_empty(&walk->all))
5c182458 1573 return;
5c182458 1574
12a169e7
HX		 1575 spin_lock_bh(&xfrm_state_lock);
1576 list_del(&walk->all);
7d0b591c 1577 spin_unlock_bh(&xfrm_state_lock);
abb81c4f
HX		 1578}
1579EXPORT_SYMBOL(xfrm_state_walk_done);
1580
f8cd5488
JHS		 1581
1582void xfrm_replay_notify(struct xfrm_state *x, int event)
1583{
1584 struct km_event c;
1585 /* we send notify messages in case
1586 * 1. we updated on of the sequence numbers, and the seqno difference
1587 * is at least x->replay_maxdiff, in this case we also update the
1588 * timeout of our timer function
1589 * 2. if x->replay_maxage has elapsed since last update,
1590 * and there were changes
1591 *
1592 * The state structure must be locked!
1593 */
1594
1595 switch (event) {
1596 case XFRM_REPLAY_UPDATE:
1597 if (x->replay_maxdiff &&
1598 (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
2717096a
JHS		 1599 (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
1600 if (x->xflags & XFRM_TIME_DEFER)
1601 event = XFRM_REPLAY_TIMEOUT;
1602 else
1603 return;
1604 }
f8cd5488
JHS		 1605
1606 break;
1607
1608 case XFRM_REPLAY_TIMEOUT:
1609 if ((x->replay.seq == x->preplay.seq) &&
1610 (x->replay.bitmap == x->preplay.bitmap) &&
2717096a
JHS		 1611 (x->replay.oseq == x->preplay.oseq)) {
1612 x->xflags |= XFRM_TIME_DEFER;
f8cd5488 1613 return;
2717096a 1614 }
f8cd5488
JHS		 1615
1616 break;
1617 }
1618
1619 memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
1620 c.event = XFRM_MSG_NEWAE;
1621 c.data.aevent = event;
1622 km_state_notify(x, &c);
1623
f8cd5488 1624 if (x->replay_maxage &&
a47f0ce0 1625 !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
2717096a 1626 x->xflags &= ~XFRM_TIME_DEFER;
f8cd5488
JHS		 1627}
1628
1629static void xfrm_replay_timer_handler(unsigned long data)
1630{
1631 struct xfrm_state *x = (struct xfrm_state*)data;
1632
1633 spin_lock(&x->lock);
1634
2717096a 1635 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1636 if (xfrm_aevent_is_on(xs_net(x)))
2717096a
JHS		 1637 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
1638 else
1639 x->xflags |= XFRM_TIME_DEFER;
1640 }
f8cd5488
JHS		 1641
1642 spin_unlock(&x->lock);
1643}
1644
afeb14b4
PM		 1645int xfrm_replay_check(struct xfrm_state *x,
1646 struct sk_buff *skb, __be32 net_seq)
1da177e4
LT		 1647{
1648 u32 diff;
a252cc23 1649 u32 seq = ntohl(net_seq);
1da177e4
LT		 1650
1651 if (unlikely(seq == 0))
afeb14b4 1652 goto err;
1da177e4
LT		 1653
1654 if (likely(seq > x->replay.seq))
1655 return 0;
1656
1657 diff = x->replay.seq - seq;
4c4d51a7
HX		 1658 if (diff >= min_t(unsigned int, x->props.replay_window,
1659 sizeof(x->replay.bitmap) * 8)) {
1da177e4 1660 x->stats.replay_window++;
afeb14b4 1661 goto err;
1da177e4
LT		 1662 }
1663
1664 if (x->replay.bitmap & (1U << diff)) {
1665 x->stats.replay++;
afeb14b4 1666 goto err;
1da177e4
LT		 1667 }
1668 return 0;
afeb14b4
PM		 1669
1670err:
1671 xfrm_audit_state_replay(x, skb, net_seq);
1672 return -EINVAL;
1da177e4 1673}
1da177e4 1674
61f4627b 1675void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
1da177e4
LT		 1676{
1677 u32 diff;
61f4627b 1678 u32 seq = ntohl(net_seq);
1da177e4
LT		 1679
1680 if (seq > x->replay.seq) {
1681 diff = seq - x->replay.seq;
1682 if (diff < x->props.replay_window)
1683 x->replay.bitmap = ((x->replay.bitmap) << diff) | 1;
1684 else
1685 x->replay.bitmap = 1;
1686 x->replay.seq = seq;
1687 } else {
1688 diff = x->replay.seq - seq;
1689 x->replay.bitmap |= (1U << diff);
1690 }
f8cd5488 1691
a6483b79 1692 if (xfrm_aevent_is_on(xs_net(x)))
f8cd5488 1693 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1da177e4 1694}
1da177e4 1695
df01812e 1696static LIST_HEAD(xfrm_km_list);
1da177e4
LT		 1697static DEFINE_RWLOCK(xfrm_km_lock);
1698
26b15dad 1699void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 1700{
1701 struct xfrm_mgr *km;
1702
26b15dad
JHS		 1703 read_lock(&xfrm_km_lock);
1704 list_for_each_entry(km, &xfrm_km_list, list)
1705 if (km->notify_policy)
1706 km->notify_policy(xp, dir, c);
1707 read_unlock(&xfrm_km_lock);
1708}
1da177e4 1709
26b15dad
JHS		 1710void km_state_notify(struct xfrm_state *x, struct km_event *c)
1711{
1712 struct xfrm_mgr *km;
1da177e4
LT		 1713 read_lock(&xfrm_km_lock);
1714 list_for_each_entry(km, &xfrm_km_list, list)
26b15dad
JHS		 1715 if (km->notify)
1716 km->notify(x, c);
1da177e4 1717 read_unlock(&xfrm_km_lock);
26b15dad
JHS		 1718}
1719
1720EXPORT_SYMBOL(km_policy_notify);
1721EXPORT_SYMBOL(km_state_notify);
1722
53bc6b4d 1723void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
26b15dad 1724{
98806f75 1725 struct net *net = xs_net(x);
26b15dad
JHS		 1726 struct km_event c;
1727
bf08867f 1728 c.data.hard = hard;
53bc6b4d 1729 c.pid = pid;
f60f6b8f 1730 c.event = XFRM_MSG_EXPIRE;
26b15dad 1731 km_state_notify(x, &c);
1da177e4
LT		 1732
1733 if (hard)
98806f75 1734 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1735}
1736
53bc6b4d 1737EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1738/*
1739 * We send to all registered managers regardless of failure
1740 * We are happy with one success
1741*/
980ebd25 1742int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1743{
26b15dad 1744 int err = -EINVAL, acqret;
1da177e4
LT		 1745 struct xfrm_mgr *km;
1746
1747 read_lock(&xfrm_km_lock);
1748 list_for_each_entry(km, &xfrm_km_list, list) {
26b15dad
JHS		 1749 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1750 if (!acqret)
1751 err = acqret;
1da177e4
LT		 1752 }
1753 read_unlock(&xfrm_km_lock);
1754 return err;
1755}
980ebd25 1756EXPORT_SYMBOL(km_query);
1da177e4 1757
5d36b180 1758int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1759{
1760 int err = -EINVAL;
1761 struct xfrm_mgr *km;
1762
1763 read_lock(&xfrm_km_lock);
1764 list_for_each_entry(km, &xfrm_km_list, list) {
1765 if (km->new_mapping)
1766 err = km->new_mapping(x, ipaddr, sport);
1767 if (!err)
1768 break;
1769 }
1770 read_unlock(&xfrm_km_lock);
1771 return err;
1772}
1773EXPORT_SYMBOL(km_new_mapping);
1774
6c5c8ca7 1775void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1da177e4 1776{
98806f75 1777 struct net *net = xp_net(pol);
26b15dad 1778 struct km_event c;
1da177e4 1779
bf08867f 1780 c.data.hard = hard;
6c5c8ca7 1781 c.pid = pid;
f60f6b8f 1782 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1783 km_policy_notify(pol, dir, &c);
1da177e4
LT		 1784
1785 if (hard)
98806f75 1786 wake_up(&net->xfrm.km_waitq);
1da177e4 1787}
a70fcb0b 1788EXPORT_SYMBOL(km_policy_expired);
1da177e4 1789
2d60abc2 1790#ifdef CONFIG_XFRM_MIGRATE
80c9abaa 1791int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1792 struct xfrm_migrate *m, int num_migrate,
1793 struct xfrm_kmaddress *k)
80c9abaa
SS		 1794{
1795 int err = -EINVAL;
1796 int ret;
1797 struct xfrm_mgr *km;
1798
1799 read_lock(&xfrm_km_lock);
1800 list_for_each_entry(km, &xfrm_km_list, list) {
1801 if (km->migrate) {
13c1d189 1802 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1803 if (!ret)
1804 err = ret;
1805 }
1806 }
1807 read_unlock(&xfrm_km_lock);
1808 return err;
1809}
1810EXPORT_SYMBOL(km_migrate);
2d60abc2 1811#endif
80c9abaa 1812
db983c11 1813int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1814{
1815 int err = -EINVAL;
1816 int ret;
1817 struct xfrm_mgr *km;
1818
1819 read_lock(&xfrm_km_lock);
1820 list_for_each_entry(km, &xfrm_km_list, list) {
1821 if (km->report) {
db983c11 1822 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1823 if (!ret)
1824 err = ret;
1825 }
1826 }
1827 read_unlock(&xfrm_km_lock);
1828 return err;
1829}
1830EXPORT_SYMBOL(km_report);
1831
1da177e4
LT		 1832int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1833{
1834 int err;
1835 u8 *data;
1836 struct xfrm_mgr *km;
1837 struct xfrm_policy *pol = NULL;
1838
1839 if (optlen <= 0 || optlen > PAGE_SIZE)
1840 return -EMSGSIZE;
1841
1842 data = kmalloc(optlen, GFP_KERNEL);
1843 if (!data)
1844 return -ENOMEM;
1845
1846 err = -EFAULT;
1847 if (copy_from_user(data, optval, optlen))
1848 goto out;
1849
1850 err = -EINVAL;
1851 read_lock(&xfrm_km_lock);
1852 list_for_each_entry(km, &xfrm_km_list, list) {
cb969f07 1853 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1854 optlen, &err);
1855 if (err >= 0)
1856 break;
1857 }
1858 read_unlock(&xfrm_km_lock);
1859
1860 if (err >= 0) {
1861 xfrm_sk_policy_insert(sk, err, pol);
1862 xfrm_pol_put(pol);
1863 err = 0;
1864 }
1865
1866out:
1867 kfree(data);
1868 return err;
1869}
1870EXPORT_SYMBOL(xfrm_user_policy);
1871
1872int xfrm_register_km(struct xfrm_mgr *km)
1873{
1874 write_lock_bh(&xfrm_km_lock);
1875 list_add_tail(&km->list, &xfrm_km_list);
1876 write_unlock_bh(&xfrm_km_lock);
1877 return 0;
1878}
1879EXPORT_SYMBOL(xfrm_register_km);
1880
1881int xfrm_unregister_km(struct xfrm_mgr *km)
1882{
1883 write_lock_bh(&xfrm_km_lock);
1884 list_del(&km->list);
1885 write_unlock_bh(&xfrm_km_lock);
1886 return 0;
1887}
1888EXPORT_SYMBOL(xfrm_unregister_km);
1889
1890int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1891{
1892 int err = 0;
1893 if (unlikely(afinfo == NULL))
1894 return -EINVAL;
1895 if (unlikely(afinfo->family >= NPROTO))
1896 return -EAFNOSUPPORT;
f3111502 1897 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1898 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1899 err = -ENOBUFS;
edcd5821 1900 else
1da177e4 1901 xfrm_state_afinfo[afinfo->family] = afinfo;
f3111502 1902 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1903 return err;
1904}
1905EXPORT_SYMBOL(xfrm_state_register_afinfo);
1906
1907int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1908{
1909 int err = 0;
1910 if (unlikely(afinfo == NULL))
1911 return -EINVAL;
1912 if (unlikely(afinfo->family >= NPROTO))
1913 return -EAFNOSUPPORT;
f3111502 1914 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1915 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1916 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1917 err = -EINVAL;
edcd5821 1918 else
1da177e4 1919 xfrm_state_afinfo[afinfo->family] = NULL;
1da177e4 1920 }
f3111502 1921 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1922 return err;
1923}
1924EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1925
17c2a42a 1926static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1927{
1928 struct xfrm_state_afinfo *afinfo;
1929 if (unlikely(family >= NPROTO))
1930 return NULL;
1931 read_lock(&xfrm_state_afinfo_lock);
1932 afinfo = xfrm_state_afinfo[family];
546be240
HX		 1933 if (unlikely(!afinfo))
1934 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1935 return afinfo;
1936}
1937
17c2a42a 1938static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 1939 __releases(xfrm_state_afinfo_lock)
1da177e4 1940{
546be240 1941 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1942}
1943
1944/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1945void xfrm_state_delete_tunnel(struct xfrm_state *x)
1946{
1947 if (x->tunnel) {
1948 struct xfrm_state *t = x->tunnel;
1949
1950 if (atomic_read(&t->tunnel_users) == 2)
1951 xfrm_state_delete(t);
1952 atomic_dec(&t->tunnel_users);
1953 xfrm_state_put(t);
1954 x->tunnel = NULL;
1955 }
1956}
1957EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1958
1959int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1960{
c5c25238 1961 int res;
1da177e4 1962
c5c25238
PM		 1963 spin_lock_bh(&x->lock);
1964 if (x->km.state == XFRM_STATE_VALID &&
1965 x->type && x->type->get_mtu)
1966 res = x->type->get_mtu(x, mtu);
1967 else
28121617 1968 res = mtu - x->props.header_len;
c5c25238 1969 spin_unlock_bh(&x->lock);
1da177e4
LT		 1970 return res;
1971}
1972
72cb6962
HX		 1973int xfrm_init_state(struct xfrm_state *x)
1974{
d094cd83 1975 struct xfrm_state_afinfo *afinfo;
df9dcb45 1976 struct xfrm_mode *inner_mode;
d094cd83 1977 int family = x->props.family;
72cb6962
HX		 1978 int err;
1979
d094cd83
HX		 1980 err = -EAFNOSUPPORT;
1981 afinfo = xfrm_state_get_afinfo(family);
1982 if (!afinfo)
1983 goto error;
1984
1985 err = 0;
1986 if (afinfo->init_flags)
1987 err = afinfo->init_flags(x);
1988
1989 xfrm_state_put_afinfo(afinfo);
1990
1991 if (err)
1992 goto error;
1993
1994 err = -EPROTONOSUPPORT;
13996378 1995
df9dcb45
KM		 1996 if (x->sel.family != AF_UNSPEC) {
1997 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1998 if (inner_mode == NULL)
1999 goto error;
2000
2001 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2002 family != x->sel.family) {
2003 xfrm_put_mode(inner_mode);
2004 goto error;
2005 }
2006
2007 x->inner_mode = inner_mode;
2008 } else {
2009 struct xfrm_mode *inner_mode_iaf;
d81d2285 2010 int iafamily = AF_INET;
df9dcb45 2011
d81d2285 2012 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2013 if (inner_mode == NULL)
2014 goto error;
2015
2016 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2017 xfrm_put_mode(inner_mode);
2018 goto error;
2019 }
d81d2285 2020 x->inner_mode = inner_mode;
df9dcb45 2021
d81d2285
MW		 2022 if (x->props.family == AF_INET)
2023 iafamily = AF_INET6;
df9dcb45 2024
d81d2285
MW		 2025 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2026 if (inner_mode_iaf) {
2027 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2028 x->inner_mode_iaf = inner_mode_iaf;
2029 else
2030 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 2031 }
2032 }
13996378 2033
d094cd83 2034 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2035 if (x->type == NULL)
2036 goto error;
2037
2038 err = x->type->init_state(x);
2039 if (err)
2040 goto error;
2041
13996378
HX		 2042 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2043 if (x->outer_mode == NULL)
b59f45d0
HX		 2044 goto error;
2045
72cb6962
HX		 2046 x->km.state = XFRM_STATE_VALID;
2047
2048error:
2049 return err;
2050}
2051
2052EXPORT_SYMBOL(xfrm_init_state);
a716c119 2053
d62ddc21 2054int __net_init xfrm_state_init(struct net *net)
1da177e4 2055{
f034b5d4
DM		 2056 unsigned int sz;
2057
9d4139c7
AD		 2058 INIT_LIST_HEAD(&net->xfrm.state_all);
2059
f034b5d4
DM		 2060 sz = sizeof(struct hlist_head) * 8;
2061
73d189dc
AD		 2062 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2063 if (!net->xfrm.state_bydst)
2064 goto out_bydst;
d320bbb3
AD		 2065 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2066 if (!net->xfrm.state_bysrc)
2067 goto out_bysrc;
b754a4fd
AD		 2068 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2069 if (!net->xfrm.state_byspi)
2070 goto out_byspi;
529983ec 2071 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2072
0bf7c5b0 2073 net->xfrm.state_num = 0;
63082733 2074 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2075 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2076 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
50a30657 2077 init_waitqueue_head(&net->xfrm.km_waitq);
d62ddc21 2078 return 0;
73d189dc 2079
b754a4fd
AD		 2080out_byspi:
2081 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2082out_bysrc:
2083 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2084out_bydst:
2085 return -ENOMEM;
d62ddc21
AD		 2086}
2087
2088void xfrm_state_fini(struct net *net)
2089{
7c2776ee 2090 struct xfrm_audit audit_info;
73d189dc
AD		 2091 unsigned int sz;
2092
7c2776ee
AD		 2093 flush_work(&net->xfrm.state_hash_work);
2094 audit_info.loginuid = -1;
2095 audit_info.sessionid = -1;
2096 audit_info.secid = 0;
2097 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2098 flush_work(&net->xfrm.state_gc_work);
2099
9d4139c7 2100 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2101
529983ec 2102 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2103 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2104 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2105 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2106 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2107 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2108 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2109}
2110
ab5f5e8b 2111#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2112static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2113 struct audit_buffer *audit_buf)
ab5f5e8b 2114{
68277acc
PM		 2115 struct xfrm_sec_ctx *ctx = x->security;
2116 u32 spi = ntohl(x->id.spi);
2117
2118 if (ctx)
ab5f5e8b 2119 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2120 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2121
2122 switch(x->props.family) {
2123 case AF_INET:
21454aaa
HH		 2124 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2125 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2126 break;
2127 case AF_INET6:
5b095d98 2128 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2129 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2130 break;
2131 }
68277acc
PM		 2132
2133 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2134}
2135
cf35f43e
IJ		 2136static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2137 struct audit_buffer *audit_buf)
afeb14b4
PM		 2138{
2139 struct iphdr *iph4;
2140 struct ipv6hdr *iph6;
2141
2142 switch (family) {
2143 case AF_INET:
2144 iph4 = ip_hdr(skb);
21454aaa
HH		 2145 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2146 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2147 break;
2148 case AF_INET6:
2149 iph6 = ipv6_hdr(skb);
2150 audit_log_format(audit_buf,
5b095d98 2151 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2152 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2153 iph6->flow_lbl[0] & 0x0f,
2154 iph6->flow_lbl[1],
2155 iph6->flow_lbl[2]);
2156 break;
2157 }
2158}
2159
68277acc 2160void xfrm_audit_state_add(struct xfrm_state *x, int result,
2532386f 2161 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2162{
2163 struct audit_buffer *audit_buf;
ab5f5e8b 2164
afeb14b4 2165 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2166 if (audit_buf == NULL)
2167 return;
2532386f 2168 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2169 xfrm_audit_helper_sainfo(x, audit_buf);
2170 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2171 audit_log_end(audit_buf);
2172}
2173EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2174
68277acc 2175void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2532386f 2176 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2177{
2178 struct audit_buffer *audit_buf;
ab5f5e8b 2179
afeb14b4 2180 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2181 if (audit_buf == NULL)
2182 return;
2532386f 2183 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2184 xfrm_audit_helper_sainfo(x, audit_buf);
2185 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2186 audit_log_end(audit_buf);
2187}
2188EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2189
2190void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2191 struct sk_buff *skb)
2192{
2193 struct audit_buffer *audit_buf;
2194 u32 spi;
2195
2196 audit_buf = xfrm_audit_start("SA-replay-overflow");
2197 if (audit_buf == NULL)
2198 return;
2199 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2200 /* don't record the sequence number because it's inherent in this kind
2201 * of audit message */
2202 spi = ntohl(x->id.spi);
2203 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2204 audit_log_end(audit_buf);
2205}
2206EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2207
2208static void xfrm_audit_state_replay(struct xfrm_state *x,
2209 struct sk_buff *skb, __be32 net_seq)
2210{
2211 struct audit_buffer *audit_buf;
2212 u32 spi;
2213
2214 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2215 if (audit_buf == NULL)
2216 return;
2217 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2218 spi = ntohl(x->id.spi);
2219 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2220 spi, spi, ntohl(net_seq));
2221 audit_log_end(audit_buf);
2222}
2223
2224void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2225{
2226 struct audit_buffer *audit_buf;
2227
2228 audit_buf = xfrm_audit_start("SA-notfound");
2229 if (audit_buf == NULL)
2230 return;
2231 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2232 audit_log_end(audit_buf);
2233}
2234EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2235
2236void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2237 __be32 net_spi, __be32 net_seq)
2238{
2239 struct audit_buffer *audit_buf;
2240 u32 spi;
2241
2242 audit_buf = xfrm_audit_start("SA-notfound");
2243 if (audit_buf == NULL)
2244 return;
2245 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2246 spi = ntohl(net_spi);
2247 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2248 spi, spi, ntohl(net_seq));
2249 audit_log_end(audit_buf);
2250}
2251EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2252
2253void xfrm_audit_state_icvfail(struct xfrm_state *x,
2254 struct sk_buff *skb, u8 proto)
2255{
2256 struct audit_buffer *audit_buf;
2257 __be32 net_spi;
2258 __be32 net_seq;
2259
2260 audit_buf = xfrm_audit_start("SA-icv-failure");
2261 if (audit_buf == NULL)
2262 return;
2263 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2264 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2265 u32 spi = ntohl(net_spi);
2266 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2267 spi, spi, ntohl(net_seq));
2268 }
2269 audit_log_end(audit_buf);
2270}
2271EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2272#endif /* CONFIG_AUDITSYSCALL */
Linux kernel - Deliverables
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