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atm: Allow MSG_PEEK for atm sockets
[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>
9e0d57fd 24#include <linux/ktime.h>
5a0e3ad6 25#include <linux/slab.h>
9e0d57fd
YP		 26#include <linux/interrupt.h>
27#include <linux/kernel.h>
1da177e4 28
44e36b42
DM		 29#include "xfrm_hash.h"
30
1da177e4
LT		 31/* Each xfrm_state may be linked to two tables:
32
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 34 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 35 destination/tunnel endpoint. (output)
36 */
37
38static DEFINE_SPINLOCK(xfrm_state_lock);
39
f034b5d4 40static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
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
64d0cd00 45static inline unsigned int xfrm_dst_hash(struct net *net,
2ab38503
DM		 46 const xfrm_address_t *daddr,
47 const xfrm_address_t *saddr,
c1969f29 48 u32 reqid,
a624c108 49 unsigned short family)
f034b5d4 50{
64d0cd00 51 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 52}
53
64d0cd00 54static inline unsigned int xfrm_src_hash(struct net *net,
2ab38503
DM		 55 const xfrm_address_t *daddr,
56 const xfrm_address_t *saddr,
44e36b42 57 unsigned short family)
f034b5d4 58{
64d0cd00 59 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 60}
61
f034b5d4 62static inline unsigned int
2ab38503
DM		 63xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
64 __be32 spi, u8 proto, unsigned short family)
f034b5d4 65{
64d0cd00 66 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 67}
68
f034b5d4
DM		 69static void xfrm_hash_transfer(struct hlist_head *list,
70 struct hlist_head *ndsttable,
71 struct hlist_head *nsrctable,
72 struct hlist_head *nspitable,
73 unsigned int nhashmask)
74{
75 struct hlist_node *entry, *tmp;
76 struct xfrm_state *x;
77
78 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
79 unsigned int h;
80
c1969f29
DM		 81 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
82 x->props.reqid, x->props.family,
83 nhashmask);
f034b5d4
DM		 84 hlist_add_head(&x->bydst, ndsttable+h);
85
667bbcb6
MN		 86 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
87 x->props.family,
f034b5d4
DM		 88 nhashmask);
89 hlist_add_head(&x->bysrc, nsrctable+h);
90
7b4dc360
MN		 91 if (x->id.spi) {
92 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
93 x->id.proto, x->props.family,
94 nhashmask);
95 hlist_add_head(&x->byspi, nspitable+h);
96 }
f034b5d4
DM		 97 }
98}
99
63082733 100static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 101{
63082733 102 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 103}
104
105static DEFINE_MUTEX(hash_resize_mutex);
106
63082733 107static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 108{
63082733 109 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 110 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
111 unsigned long nsize, osize;
112 unsigned int nhashmask, ohashmask;
113 int i;
114
115 mutex_lock(&hash_resize_mutex);
116
63082733 117 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 118 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 119 if (!ndst)
120 goto out_unlock;
44e36b42 121 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 122 if (!nsrc) {
44e36b42 123 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 124 goto out_unlock;
125 }
44e36b42 126 nspi = xfrm_hash_alloc(nsize);
f034b5d4 127 if (!nspi) {
44e36b42
DM		 128 xfrm_hash_free(ndst, nsize);
129 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 130 goto out_unlock;
131 }
132
133 spin_lock_bh(&xfrm_state_lock);
134
135 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 136 for (i = net->xfrm.state_hmask; i >= 0; i--)
137 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 138 nhashmask);
139
63082733
AD		 140 odst = net->xfrm.state_bydst;
141 osrc = net->xfrm.state_bysrc;
142 ospi = net->xfrm.state_byspi;
143 ohashmask = net->xfrm.state_hmask;
f034b5d4 144
63082733
AD		 145 net->xfrm.state_bydst = ndst;
146 net->xfrm.state_bysrc = nsrc;
147 net->xfrm.state_byspi = nspi;
148 net->xfrm.state_hmask = nhashmask;
f034b5d4
DM		 149
150 spin_unlock_bh(&xfrm_state_lock);
151
152 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 153 xfrm_hash_free(odst, osize);
154 xfrm_hash_free(osrc, osize);
155 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 156
157out_unlock:
158 mutex_unlock(&hash_resize_mutex);
159}
160
1da177e4
LT		 161static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
162static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
163
1da177e4
LT		 164static DEFINE_SPINLOCK(xfrm_state_gc_lock);
165
53bc6b4d 166int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 167
980ebd25 168int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
53bc6b4d 169void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
1da177e4 170
aa5d62cc
HX		 171static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
172{
173 struct xfrm_state_afinfo *afinfo;
174 if (unlikely(family >= NPROTO))
175 return NULL;
176 write_lock_bh(&xfrm_state_afinfo_lock);
177 afinfo = xfrm_state_afinfo[family];
178 if (unlikely(!afinfo))
179 write_unlock_bh(&xfrm_state_afinfo_lock);
180 return afinfo;
181}
182
183static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 184 __releases(xfrm_state_afinfo_lock)
aa5d62cc
HX		 185{
186 write_unlock_bh(&xfrm_state_afinfo_lock);
187}
188
533cb5b0 189int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 190{
191 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 192 const struct xfrm_type **typemap;
aa5d62cc
HX		 193 int err = 0;
194
195 if (unlikely(afinfo == NULL))
196 return -EAFNOSUPPORT;
197 typemap = afinfo->type_map;
198
199 if (likely(typemap[type->proto] == NULL))
200 typemap[type->proto] = type;
201 else
202 err = -EEXIST;
203 xfrm_state_unlock_afinfo(afinfo);
204 return err;
205}
206EXPORT_SYMBOL(xfrm_register_type);
207
533cb5b0 208int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 209{
210 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 211 const struct xfrm_type **typemap;
aa5d62cc
HX		 212 int err = 0;
213
214 if (unlikely(afinfo == NULL))
215 return -EAFNOSUPPORT;
216 typemap = afinfo->type_map;
217
218 if (unlikely(typemap[type->proto] != type))
219 err = -ENOENT;
220 else
221 typemap[type->proto] = NULL;
222 xfrm_state_unlock_afinfo(afinfo);
223 return err;
224}
225EXPORT_SYMBOL(xfrm_unregister_type);
226
533cb5b0 227static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 228{
229 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 230 const struct xfrm_type **typemap;
231 const struct xfrm_type *type;
aa5d62cc
HX		 232 int modload_attempted = 0;
233
234retry:
235 afinfo = xfrm_state_get_afinfo(family);
236 if (unlikely(afinfo == NULL))
237 return NULL;
238 typemap = afinfo->type_map;
239
240 type = typemap[proto];
241 if (unlikely(type && !try_module_get(type->owner)))
242 type = NULL;
243 if (!type && !modload_attempted) {
244 xfrm_state_put_afinfo(afinfo);
245 request_module("xfrm-type-%d-%d", family, proto);
246 modload_attempted = 1;
247 goto retry;
248 }
249
250 xfrm_state_put_afinfo(afinfo);
251 return type;
252}
253
533cb5b0 254static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 255{
256 module_put(type->owner);
257}
258
259int xfrm_register_mode(struct xfrm_mode *mode, int family)
260{
261 struct xfrm_state_afinfo *afinfo;
262 struct xfrm_mode **modemap;
263 int err;
264
265 if (unlikely(mode->encap >= XFRM_MODE_MAX))
266 return -EINVAL;
267
268 afinfo = xfrm_state_lock_afinfo(family);
269 if (unlikely(afinfo == NULL))
270 return -EAFNOSUPPORT;
271
272 err = -EEXIST;
273 modemap = afinfo->mode_map;
17c2a42a
HX		 274 if (modemap[mode->encap])
275 goto out;
aa5d62cc 276
17c2a42a
HX		 277 err = -ENOENT;
278 if (!try_module_get(afinfo->owner))
279 goto out;
280
281 mode->afinfo = afinfo;
282 modemap[mode->encap] = mode;
283 err = 0;
284
285out:
aa5d62cc
HX		 286 xfrm_state_unlock_afinfo(afinfo);
287 return err;
288}
289EXPORT_SYMBOL(xfrm_register_mode);
290
291int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
292{
293 struct xfrm_state_afinfo *afinfo;
294 struct xfrm_mode **modemap;
295 int err;
296
297 if (unlikely(mode->encap >= XFRM_MODE_MAX))
298 return -EINVAL;
299
300 afinfo = xfrm_state_lock_afinfo(family);
301 if (unlikely(afinfo == NULL))
302 return -EAFNOSUPPORT;
303
304 err = -ENOENT;
305 modemap = afinfo->mode_map;
306 if (likely(modemap[mode->encap] == mode)) {
307 modemap[mode->encap] = NULL;
17c2a42a 308 module_put(mode->afinfo->owner);
aa5d62cc
HX		 309 err = 0;
310 }
311
312 xfrm_state_unlock_afinfo(afinfo);
313 return err;
314}
315EXPORT_SYMBOL(xfrm_unregister_mode);
316
317static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
318{
319 struct xfrm_state_afinfo *afinfo;
320 struct xfrm_mode *mode;
321 int modload_attempted = 0;
322
323 if (unlikely(encap >= XFRM_MODE_MAX))
324 return NULL;
325
326retry:
327 afinfo = xfrm_state_get_afinfo(family);
328 if (unlikely(afinfo == NULL))
329 return NULL;
330
331 mode = afinfo->mode_map[encap];
332 if (unlikely(mode && !try_module_get(mode->owner)))
333 mode = NULL;
334 if (!mode && !modload_attempted) {
335 xfrm_state_put_afinfo(afinfo);
336 request_module("xfrm-mode-%d-%d", family, encap);
337 modload_attempted = 1;
338 goto retry;
339 }
340
341 xfrm_state_put_afinfo(afinfo);
342 return mode;
343}
344
345static void xfrm_put_mode(struct xfrm_mode *mode)
346{
347 module_put(mode->owner);
348}
349
1da177e4
LT		 350static void xfrm_state_gc_destroy(struct xfrm_state *x)
351{
9e0d57fd 352 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 353 del_timer_sync(&x->rtimer);
a51482bd
JJ		 354 kfree(x->aalg);
355 kfree(x->ealg);
356 kfree(x->calg);
357 kfree(x->encap);
060f02a3 358 kfree(x->coaddr);
d8647b79
SK		 359 kfree(x->replay_esn);
360 kfree(x->preplay_esn);
13996378
HX		 361 if (x->inner_mode)
362 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 363 if (x->inner_mode_iaf)
364 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 365 if (x->outer_mode)
366 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 367 if (x->type) {
368 x->type->destructor(x);
369 xfrm_put_type(x->type);
370 }
df71837d 371 security_xfrm_state_free(x);
1da177e4
LT		 372 kfree(x);
373}
374
c7837144 375static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 376{
c7837144 377 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7
HX		 378 struct xfrm_state *x;
379 struct hlist_node *entry, *tmp;
380 struct hlist_head gc_list;
1da177e4 381
1da177e4 382 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 383 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 384 spin_unlock_bh(&xfrm_state_gc_lock);
385
12a169e7 386 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
1da177e4 387 xfrm_state_gc_destroy(x);
8f126e37 388
50a30657 389 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 390}
391
392static inline unsigned long make_jiffies(long secs)
393{
394 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
395 return MAX_SCHEDULE_TIMEOUT-1;
396 else
a716c119 397 return secs*HZ;
1da177e4
LT		 398}
399
9e0d57fd 400static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
1da177e4 401{
9e0d57fd
YP		 402 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
403 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
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:
9e0d57fd
YP		 454 if (next != LONG_MAX){
455 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
456 }
a47f0ce0 457
1da177e4
LT		 458 goto out;
459
460expired:
461 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
462 x->km.state = XFRM_STATE_EXPIRED;
98806f75 463 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 464 next = 2;
465 goto resched;
466 }
161a09e7
JL		 467
468 err = __xfrm_state_delete(x);
469 if (!err && x->id.spi)
53bc6b4d 470 km_state_expired(x, 1, 0);
1da177e4 471
ab5f5e8b 472 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 473 audit_get_loginuid(current),
474 audit_get_sessionid(current), 0);
161a09e7 475
1da177e4
LT		 476out:
477 spin_unlock(&x->lock);
9e0d57fd 478 return HRTIMER_NORESTART;
1da177e4
LT		 479}
480
0ac84752
DM		 481static void xfrm_replay_timer_handler(unsigned long data);
482
673c09be 483struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 484{
485 struct xfrm_state *x;
486
0da974f4 487 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 488
489 if (x) {
673c09be 490 write_pnet(&x->xs_net, net);
1da177e4
LT		 491 atomic_set(&x->refcnt, 1);
492 atomic_set(&x->tunnel_users, 0);
12a169e7 493 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 494 INIT_HLIST_NODE(&x->bydst);
495 INIT_HLIST_NODE(&x->bysrc);
496 INIT_HLIST_NODE(&x->byspi);
9e0d57fd 497 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 498 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
499 (unsigned long)x);
9d729f72 500 x->curlft.add_time = get_seconds();
1da177e4
LT		 501 x->lft.soft_byte_limit = XFRM_INF;
502 x->lft.soft_packet_limit = XFRM_INF;
503 x->lft.hard_byte_limit = XFRM_INF;
504 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 505 x->replay_maxage = 0;
506 x->replay_maxdiff = 0;
df9dcb45
KM		 507 x->inner_mode = NULL;
508 x->inner_mode_iaf = NULL;
1da177e4
LT		 509 spin_lock_init(&x->lock);
510 }
511 return x;
512}
513EXPORT_SYMBOL(xfrm_state_alloc);
514
515void __xfrm_state_destroy(struct xfrm_state *x)
516{
98806f75
AD		 517 struct net *net = xs_net(x);
518
547b792c 519 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 520
521 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 522 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 523 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 524 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 525}
526EXPORT_SYMBOL(__xfrm_state_destroy);
527
53bc6b4d 528int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 529{
98806f75 530 struct net *net = xs_net(x);
26b15dad
JHS		 531 int err = -ESRCH;
532
1da177e4
LT		 533 if (x->km.state != XFRM_STATE_DEAD) {
534 x->km.state = XFRM_STATE_DEAD;
535 spin_lock(&xfrm_state_lock);
12a169e7 536 list_del(&x->km.all);
8f126e37 537 hlist_del(&x->bydst);
8f126e37 538 hlist_del(&x->bysrc);
a47f0ce0 539 if (x->id.spi)
8f126e37 540 hlist_del(&x->byspi);
98806f75 541 net->xfrm.state_num--;
1da177e4 542 spin_unlock(&xfrm_state_lock);
1da177e4 543
1da177e4
LT		 544 /* All xfrm_state objects are created by xfrm_state_alloc.
545 * The xfrm_state_alloc call gives a reference, and that
546 * is what we are dropping here.
547 */
5dba4797 548 xfrm_state_put(x);
26b15dad 549 err = 0;
1da177e4 550 }
26b15dad
JHS		 551
552 return err;
1da177e4 553}
53bc6b4d 554EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 555
26b15dad 556int xfrm_state_delete(struct xfrm_state *x)
1da177e4 557{
26b15dad
JHS		 558 int err;
559
1da177e4 560 spin_lock_bh(&x->lock);
26b15dad 561 err = __xfrm_state_delete(x);
1da177e4 562 spin_unlock_bh(&x->lock);
26b15dad
JHS		 563
564 return err;
1da177e4
LT		 565}
566EXPORT_SYMBOL(xfrm_state_delete);
567
4aa2e62c
JL		 568#ifdef CONFIG_SECURITY_NETWORK_XFRM
569static inline int
0e602451 570xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 571{
4aa2e62c
JL		 572 int i, err = 0;
573
0e602451 574 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 575 struct hlist_node *entry;
576 struct xfrm_state *x;
577
0e602451 578 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 579 if (xfrm_id_proto_match(x->id.proto, proto) &&
580 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 581 xfrm_audit_state_delete(x, 0,
582 audit_info->loginuid,
2532386f 583 audit_info->sessionid,
ab5f5e8b 584 audit_info->secid);
4aa2e62c
JL		 585 return err;
586 }
587 }
588 }
589
590 return err;
591}
592#else
593static inline int
0e602451 594xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 595{
596 return 0;
597}
598#endif
599
0e602451 600int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c 601{
9e64cc95 602 int i, err = 0, cnt = 0;
1da177e4
LT		 603
604 spin_lock_bh(&xfrm_state_lock);
0e602451 605 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 606 if (err)
607 goto out;
608
9e64cc95 609 err = -ESRCH;
0e602451 610 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 611 struct hlist_node *entry;
612 struct xfrm_state *x;
1da177e4 613restart:
0e602451 614 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1da177e4 615 if (!xfrm_state_kern(x) &&
5794708f 616 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4
LT		 617 xfrm_state_hold(x);
618 spin_unlock_bh(&xfrm_state_lock);
619
161a09e7 620 err = xfrm_state_delete(x);
ab5f5e8b
JL		 621 xfrm_audit_state_delete(x, err ? 0 : 1,
622 audit_info->loginuid,
2532386f 623 audit_info->sessionid,
ab5f5e8b 624 audit_info->secid);
1da177e4 625 xfrm_state_put(x);
9e64cc95
JHS		 626 if (!err)
627 cnt++;
1da177e4
LT		 628
629 spin_lock_bh(&xfrm_state_lock);
630 goto restart;
631 }
632 }
633 }
9e64cc95
JHS		 634 if (cnt)
635 err = 0;
4aa2e62c
JL		 636
637out:
1da177e4 638 spin_unlock_bh(&xfrm_state_lock);
0e602451 639 wake_up(&net->xfrm.km_waitq);
4aa2e62c 640 return err;
1da177e4
LT		 641}
642EXPORT_SYMBOL(xfrm_state_flush);
643
e071041b 644void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b
JHS		 645{
646 spin_lock_bh(&xfrm_state_lock);
e071041b
AD		 647 si->sadcnt = net->xfrm.state_num;
648 si->sadhcnt = net->xfrm.state_hmask;
28d8909b
JHS		 649 si->sadhmcnt = xfrm_state_hashmax;
650 spin_unlock_bh(&xfrm_state_lock);
651}
652EXPORT_SYMBOL(xfrm_sad_getinfo);
653
1da177e4 654static int
1a898592 655xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
04686013 656 const struct xfrm_tmpl *tmpl,
33765d06 657 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
8444cf71 658 unsigned short family)
1da177e4
LT		 659{
660 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
661 if (!afinfo)
662 return -1;
8444cf71
TE		 663 afinfo->init_tempsel(&x->sel, fl);
664
665 if (family != tmpl->encap_family) {
666 xfrm_state_put_afinfo(afinfo);
667 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
668 if (!afinfo)
669 return -1;
670 }
671 afinfo->init_temprop(x, tmpl, daddr, saddr);
1da177e4
LT		 672 xfrm_state_put_afinfo(afinfo);
673 return 0;
674}
675
9aa60088
DM		 676static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
677 const xfrm_address_t *daddr,
678 __be32 spi, u8 proto,
679 unsigned short family)
edcd5821 680{
221df1ed 681 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821 682 struct xfrm_state *x;
8f126e37 683 struct hlist_node *entry;
edcd5821 684
221df1ed 685 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 686 if (x->props.family != family ||
687 x->id.spi != spi ||
1802571b
WY		 688 x->id.proto != proto ||
689 xfrm_addr_cmp(&x->id.daddr, daddr, family))
edcd5821
DM		 690 continue;
691
3d6acfa7
JHS		 692 if ((mark & x->mark.m) != x->mark.v)
693 continue;
edcd5821
DM		 694 xfrm_state_hold(x);
695 return x;
696 }
697
698 return NULL;
699}
700
9aa60088
DM		 701static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
702 const xfrm_address_t *daddr,
703 const xfrm_address_t *saddr,
704 u8 proto, unsigned short family)
edcd5821 705{
221df1ed 706 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821 707 struct xfrm_state *x;
8f126e37 708 struct hlist_node *entry;
edcd5821 709
221df1ed 710 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 711 if (x->props.family != family ||
1802571b
WY		 712 x->id.proto != proto ||
713 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
714 xfrm_addr_cmp(&x->props.saddr, saddr, family))
edcd5821
DM		 715 continue;
716
3d6acfa7
JHS		 717 if ((mark & x->mark.m) != x->mark.v)
718 continue;
edcd5821
DM		 719 xfrm_state_hold(x);
720 return x;
721 }
722
723 return NULL;
724}
725
726static inline struct xfrm_state *
727__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
728{
221df1ed 729 struct net *net = xs_net(x);
bd55775c 730 u32 mark = x->mark.v & x->mark.m;
221df1ed 731
edcd5821 732 if (use_spi)
bd55775c
JHS		 733 return __xfrm_state_lookup(net, mark, &x->id.daddr,
734 x->id.spi, x->id.proto, family);
edcd5821 735 else
bd55775c
JHS		 736 return __xfrm_state_lookup_byaddr(net, mark,
737 &x->id.daddr,
edcd5821
DM		 738 &x->props.saddr,
739 x->id.proto, family);
740}
741
98806f75 742static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 743{
744 if (have_hash_collision &&
98806f75
AD		 745 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
746 net->xfrm.state_num > net->xfrm.state_hmask)
747 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 748}
749
08ec9af1 750static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
4a08ab0f 751 const struct flowi *fl, unsigned short family,
08ec9af1
DM		 752 struct xfrm_state **best, int *acq_in_progress,
753 int *error)
754{
755 /* Resolution logic:
756 * 1. There is a valid state with matching selector. Done.
757 * 2. Valid state with inappropriate selector. Skip.
758 *
759 * Entering area of "sysdeps".
760 *
761 * 3. If state is not valid, selector is temporary, it selects
762 * only session which triggered previous resolution. Key
763 * manager will do something to install a state with proper
764 * selector.
765 */
766 if (x->km.state == XFRM_STATE_VALID) {
767 if ((x->sel.family &&
768 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
769 !security_xfrm_state_pol_flow_match(x, pol, fl))
770 return;
771
772 if (!*best ||
773 (*best)->km.dying > x->km.dying ||
774 ((*best)->km.dying == x->km.dying &&
775 (*best)->curlft.add_time < x->curlft.add_time))
776 *best = x;
777 } else if (x->km.state == XFRM_STATE_ACQ) {
778 *acq_in_progress = 1;
779 } else if (x->km.state == XFRM_STATE_ERROR ||
780 x->km.state == XFRM_STATE_EXPIRED) {
781 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
782 security_xfrm_state_pol_flow_match(x, pol, fl))
783 *error = -ESRCH;
784 }
785}
786
1da177e4 787struct xfrm_state *
33765d06 788xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
b520e9f6 789 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1da177e4
LT		 790 struct xfrm_policy *pol, int *err,
791 unsigned short family)
792{
08ec9af1 793 static xfrm_address_t saddr_wildcard = { };
5447c5e4 794 struct net *net = xp_net(pol);
6a783c90 795 unsigned int h, h_wildcard;
8f126e37 796 struct hlist_node *entry;
37b08e34 797 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 798 int acquire_in_progress = 0;
799 int error = 0;
800 struct xfrm_state *best = NULL;
bd55775c 801 u32 mark = pol->mark.v & pol->mark.m;
8444cf71 802 unsigned short encap_family = tmpl->encap_family;
a716c119 803
37b08e34
DM		 804 to_put = NULL;
805
1da177e4 806 spin_lock_bh(&xfrm_state_lock);
8444cf71 807 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
5447c5e4 808 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
8444cf71 809 if (x->props.family == encap_family &&
1da177e4 810 x->props.reqid == tmpl->reqid &&
3d6acfa7 811 (mark & x->mark.m) == x->mark.v &&
fbd9a5b4 812 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 813 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1da177e4
LT		 814 tmpl->mode == x->props.mode &&
815 tmpl->id.proto == x->id.proto &&
08ec9af1 816 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 817 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1
DM		 818 &best, &acquire_in_progress, &error);
819 }
820 if (best)
821 goto found;
822
8444cf71 823 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
6a783c90 824 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
8444cf71 825 if (x->props.family == encap_family &&
08ec9af1 826 x->props.reqid == tmpl->reqid &&
3d6acfa7 827 (mark & x->mark.m) == x->mark.v &&
08ec9af1 828 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 829 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
08ec9af1
DM		 830 tmpl->mode == x->props.mode &&
831 tmpl->id.proto == x->id.proto &&
832 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 833 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1 834 &best, &acquire_in_progress, &error);
1da177e4
LT		 835 }
836
08ec9af1 837found:
1da177e4
LT		 838 x = best;
839 if (!x && !error && !acquire_in_progress) {
5c5d281a 840 if (tmpl->id.spi &&
bd55775c 841 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
8444cf71 842 tmpl->id.proto, encap_family)) != NULL) {
37b08e34 843 to_put = x0;
1da177e4
LT		 844 error = -EEXIST;
845 goto out;
846 }
5447c5e4 847 x = xfrm_state_alloc(net);
1da177e4
LT		 848 if (x == NULL) {
849 error = -ENOMEM;
850 goto out;
851 }
8444cf71 852 /* Initialize temporary state matching only
1da177e4 853 * to current session. */
8444cf71 854 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
bd55775c 855 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1da177e4 856
1d28f42c 857 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
e0d1caa7
VY		 858 if (error) {
859 x->km.state = XFRM_STATE_DEAD;
37b08e34 860 to_put = x;
e0d1caa7
VY		 861 x = NULL;
862 goto out;
863 }
864
1da177e4
LT		 865 if (km_query(x, tmpl, pol) == 0) {
866 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 867 list_add(&x->km.all, &net->xfrm.state_all);
868 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
8444cf71 869 h = xfrm_src_hash(net, daddr, saddr, encap_family);
5447c5e4 870 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 871 if (x->id.spi) {
8444cf71 872 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
5447c5e4 873 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 874 }
b27aeadb 875 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 876 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 877 net->xfrm.state_num++;
878 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 879 } else {
880 x->km.state = XFRM_STATE_DEAD;
37b08e34 881 to_put = x;
1da177e4
LT		 882 x = NULL;
883 error = -ESRCH;
884 }
885 }
886out:
887 if (x)
888 xfrm_state_hold(x);
889 else
890 *err = acquire_in_progress ? -EAGAIN : error;
891 spin_unlock_bh(&xfrm_state_lock);
37b08e34
DM		 892 if (to_put)
893 xfrm_state_put(to_put);
1da177e4
LT		 894 return x;
895}
896
628529b6 897struct xfrm_state *
bd55775c 898xfrm_stateonly_find(struct net *net, u32 mark,
5447c5e4 899 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 900 unsigned short family, u8 mode, u8 proto, u32 reqid)
901{
4bda4f25 902 unsigned int h;
628529b6
JHS		 903 struct xfrm_state *rx = NULL, *x = NULL;
904 struct hlist_node *entry;
905
906 spin_lock(&xfrm_state_lock);
5447c5e4
AD		 907 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
908 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 909 if (x->props.family == family &&
910 x->props.reqid == reqid &&
3d6acfa7 911 (mark & x->mark.m) == x->mark.v &&
628529b6
JHS		 912 !(x->props.flags & XFRM_STATE_WILDRECV) &&
913 xfrm_state_addr_check(x, daddr, saddr, family) &&
914 mode == x->props.mode &&
915 proto == x->id.proto &&
916 x->km.state == XFRM_STATE_VALID) {
917 rx = x;
918 break;
919 }
920 }
921
922 if (rx)
923 xfrm_state_hold(rx);
924 spin_unlock(&xfrm_state_lock);
925
926
927 return rx;
928}
929EXPORT_SYMBOL(xfrm_stateonly_find);
930
1da177e4
LT		 931static void __xfrm_state_insert(struct xfrm_state *x)
932{
98806f75 933 struct net *net = xs_net(x);
a624c108 934 unsigned int h;
1da177e4 935
98806f75 936 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 937
98806f75 938 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 939 x->props.reqid, x->props.family);
98806f75 940 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 941
98806f75
AD		 942 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
943 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 944
7b4dc360 945 if (x->id.spi) {
98806f75 946 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 947 x->props.family);
948
98806f75 949 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 950 }
951
9e0d57fd 952 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 953 if (x->replay_maxage)
954 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 955
98806f75 956 wake_up(&net->xfrm.km_waitq);
f034b5d4 957
98806f75 958 net->xfrm.state_num++;
f034b5d4 959
98806f75 960 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 961}
962
c7f5ea3a
DM		 963/* xfrm_state_lock is held */
964static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
965{
98806f75 966 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 967 unsigned short family = xnew->props.family;
968 u32 reqid = xnew->props.reqid;
969 struct xfrm_state *x;
970 struct hlist_node *entry;
971 unsigned int h;
3d6acfa7 972 u32 mark = xnew->mark.v & xnew->mark.m;
c7f5ea3a 973
98806f75
AD		 974 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
975 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 976 if (x->props.family == family &&
977 x->props.reqid == reqid &&
3d6acfa7 978 (mark & x->mark.m) == x->mark.v &&
c1969f29
DM		 979 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
980 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 981 x->genid++;
c7f5ea3a
DM		 982 }
983}
984
1da177e4
LT		 985void xfrm_state_insert(struct xfrm_state *x)
986{
987 spin_lock_bh(&xfrm_state_lock);
c7f5ea3a 988 __xfrm_state_bump_genids(x);
1da177e4
LT		 989 __xfrm_state_insert(x);
990 spin_unlock_bh(&xfrm_state_lock);
991}
992EXPORT_SYMBOL(xfrm_state_insert);
993
2770834c 994/* xfrm_state_lock is held */
a70486f0
DM		 995static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m,
996 unsigned short family, u8 mode,
997 u32 reqid, u8 proto,
998 const xfrm_address_t *daddr,
999 const xfrm_address_t *saddr, int create)
2770834c 1000{
5447c5e4 1001 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
8f126e37 1002 struct hlist_node *entry;
2770834c 1003 struct xfrm_state *x;
3d6acfa7 1004 u32 mark = m->v & m->m;
2770834c 1005
5447c5e4 1006 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 1007 if (x->props.reqid != reqid ||
1008 x->props.mode != mode ||
1009 x->props.family != family ||
1010 x->km.state != XFRM_STATE_ACQ ||
75e252d9 1011 x->id.spi != 0 ||
1802571b 1012 x->id.proto != proto ||
3d6acfa7 1013 (mark & x->mark.m) != x->mark.v ||
1802571b
WY		 1014 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
1015 xfrm_addr_cmp(&x->props.saddr, saddr, family))
2770834c
DM		 1016 continue;
1017
2770834c
DM		 1018 xfrm_state_hold(x);
1019 return x;
1020 }
1021
1022 if (!create)
1023 return NULL;
1024
5447c5e4 1025 x = xfrm_state_alloc(net);
2770834c
DM		 1026 if (likely(x)) {
1027 switch (family) {
1028 case AF_INET:
1029 x->sel.daddr.a4 = daddr->a4;
1030 x->sel.saddr.a4 = saddr->a4;
1031 x->sel.prefixlen_d = 32;
1032 x->sel.prefixlen_s = 32;
1033 x->props.saddr.a4 = saddr->a4;
1034 x->id.daddr.a4 = daddr->a4;
1035 break;
1036
1037 case AF_INET6:
1038 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
b71d1d42 1039 (const struct in6_addr *)daddr);
2770834c 1040 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
b71d1d42 1041 (const struct in6_addr *)saddr);
2770834c
DM		 1042 x->sel.prefixlen_d = 128;
1043 x->sel.prefixlen_s = 128;
1044 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
b71d1d42 1045 (const struct in6_addr *)saddr);
2770834c 1046 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
b71d1d42 1047 (const struct in6_addr *)daddr);
2770834c 1048 break;
3ff50b79 1049 }
2770834c
DM		 1050
1051 x->km.state = XFRM_STATE_ACQ;
1052 x->id.proto = proto;
1053 x->props.family = family;
1054 x->props.mode = mode;
1055 x->props.reqid = reqid;
bd55775c
JHS		 1056 x->mark.v = m->v;
1057 x->mark.m = m->m;
b27aeadb 1058 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1059 xfrm_state_hold(x);
9e0d57fd 1060 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1061 list_add(&x->km.all, &net->xfrm.state_all);
1062 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1063 h = xfrm_src_hash(net, daddr, saddr, family);
1064 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1065
5447c5e4 1066 net->xfrm.state_num++;
918049f0 1067
5447c5e4 1068 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1069 }
1070
1071 return x;
1072}
1073
bd55775c 1074static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1075
1076int xfrm_state_add(struct xfrm_state *x)
1077{
5447c5e4 1078 struct net *net = xs_net(x);
37b08e34 1079 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1080 int family;
1081 int err;
bd55775c 1082 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1083 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1084
1085 family = x->props.family;
1da177e4 1086
37b08e34
DM		 1087 to_put = NULL;
1088
1da177e4
LT		 1089 spin_lock_bh(&xfrm_state_lock);
1090
edcd5821 1091 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1092 if (x1) {
37b08e34 1093 to_put = x1;
1da177e4
LT		 1094 x1 = NULL;
1095 err = -EEXIST;
1096 goto out;
1097 }
1098
eb2971b6 1099 if (use_spi && x->km.seq) {
bd55775c 1100 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9
JL		 1101 if (x1 && ((x1->id.proto != x->id.proto) ||
1102 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1103 to_put = x1;
1da177e4
LT		 1104 x1 = NULL;
1105 }
1106 }
1107
eb2971b6 1108 if (use_spi && !x1)
bd55775c
JHS		 1109 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1110 x->props.reqid, x->id.proto,
2770834c 1111 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1112
c7f5ea3a 1113 __xfrm_state_bump_genids(x);
1da177e4
LT		 1114 __xfrm_state_insert(x);
1115 err = 0;
1116
1117out:
1118 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1119
1120 if (x1) {
1121 xfrm_state_delete(x1);
1122 xfrm_state_put(x1);
1123 }
1124
37b08e34
DM		 1125 if (to_put)
1126 xfrm_state_put(to_put);
1127
1da177e4
LT		 1128 return err;
1129}
1130EXPORT_SYMBOL(xfrm_state_add);
1131
80c9abaa 1132#ifdef CONFIG_XFRM_MIGRATE
6666351d 1133static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1134{
98806f75 1135 struct net *net = xs_net(orig);
80c9abaa 1136 int err = -ENOMEM;
98806f75 1137 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1138 if (!x)
553f9118 1139 goto out;
80c9abaa
SS		 1140
1141 memcpy(&x->id, &orig->id, sizeof(x->id));
1142 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1143 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1144 x->props.mode = orig->props.mode;
1145 x->props.replay_window = orig->props.replay_window;
1146 x->props.reqid = orig->props.reqid;
1147 x->props.family = orig->props.family;
1148 x->props.saddr = orig->props.saddr;
1149
1150 if (orig->aalg) {
4447bb33 1151 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1152 if (!x->aalg)
1153 goto error;
1154 }
1155 x->props.aalgo = orig->props.aalgo;
1156
1157 if (orig->ealg) {
1158 x->ealg = xfrm_algo_clone(orig->ealg);
1159 if (!x->ealg)
1160 goto error;
1161 }
1162 x->props.ealgo = orig->props.ealgo;
1163
1164 if (orig->calg) {
1165 x->calg = xfrm_algo_clone(orig->calg);
1166 if (!x->calg)
1167 goto error;
1168 }
1169 x->props.calgo = orig->props.calgo;
1170
a716c119 1171 if (orig->encap) {
80c9abaa
SS		 1172 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1173 if (!x->encap)
1174 goto error;
1175 }
1176
1177 if (orig->coaddr) {
1178 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1179 GFP_KERNEL);
1180 if (!x->coaddr)
1181 goto error;
1182 }
1183
af2f464e
SK		 1184 if (orig->replay_esn) {
1185 err = xfrm_replay_clone(x, orig);
1186 if (err)
1187 goto error;
1188 }
1189
bd55775c
JHS		 1190 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1191
80c9abaa
SS		 1192 err = xfrm_init_state(x);
1193 if (err)
1194 goto error;
1195
1196 x->props.flags = orig->props.flags;
1197
1198 x->curlft.add_time = orig->curlft.add_time;
1199 x->km.state = orig->km.state;
1200 x->km.seq = orig->km.seq;
1201
1202 return x;
1203
1204 error:
553f9118
HX		 1205 xfrm_state_put(x);
1206out:
80c9abaa
SS		 1207 if (errp)
1208 *errp = err;
80c9abaa
SS		 1209 return NULL;
1210}
80c9abaa
SS		 1211
1212/* xfrm_state_lock is held */
1213struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1214{
1215 unsigned int h;
1216 struct xfrm_state *x;
1217 struct hlist_node *entry;
1218
1219 if (m->reqid) {
64d0cd00 1220 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1221 m->reqid, m->old_family);
73d189dc 1222 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1223 if (x->props.mode != m->mode ||
1224 x->id.proto != m->proto)
1225 continue;
1226 if (m->reqid && x->props.reqid != m->reqid)
1227 continue;
1228 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1229 m->old_family) ||
1230 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1231 m->old_family))
1232 continue;
1233 xfrm_state_hold(x);
1234 return x;
1235 }
1236 } else {
64d0cd00 1237 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1238 m->old_family);
d320bbb3 1239 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1240 if (x->props.mode != m->mode ||
1241 x->id.proto != m->proto)
1242 continue;
1243 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1244 m->old_family) ||
1245 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1246 m->old_family))
1247 continue;
1248 xfrm_state_hold(x);
1249 return x;
1250 }
1251 }
1252
a716c119 1253 return NULL;
80c9abaa
SS		 1254}
1255EXPORT_SYMBOL(xfrm_migrate_state_find);
1256
1257struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1258 struct xfrm_migrate *m)
1259{
1260 struct xfrm_state *xc;
1261 int err;
1262
1263 xc = xfrm_state_clone(x, &err);
1264 if (!xc)
1265 return NULL;
1266
1267 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1268 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1269
1270 /* add state */
1271 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1272 /* a care is needed when the destination address of the
1273 state is to be updated as it is a part of triplet */
1274 xfrm_state_insert(xc);
1275 } else {
1276 if ((err = xfrm_state_add(xc)) < 0)
1277 goto error;
1278 }
1279
1280 return xc;
1281error:
78347c8c 1282 xfrm_state_put(xc);
80c9abaa
SS		 1283 return NULL;
1284}
1285EXPORT_SYMBOL(xfrm_state_migrate);
1286#endif
1287
1da177e4
LT		 1288int xfrm_state_update(struct xfrm_state *x)
1289{
37b08e34 1290 struct xfrm_state *x1, *to_put;
1da177e4 1291 int err;
eb2971b6 1292 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4 1293
37b08e34
DM		 1294 to_put = NULL;
1295
1da177e4 1296 spin_lock_bh(&xfrm_state_lock);
edcd5821 1297 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1298
1299 err = -ESRCH;
1300 if (!x1)
1301 goto out;
1302
1303 if (xfrm_state_kern(x1)) {
37b08e34 1304 to_put = x1;
1da177e4
LT		 1305 err = -EEXIST;
1306 goto out;
1307 }
1308
1309 if (x1->km.state == XFRM_STATE_ACQ) {
1310 __xfrm_state_insert(x);
1311 x = NULL;
1312 }
1313 err = 0;
1314
1315out:
1316 spin_unlock_bh(&xfrm_state_lock);
1da177e4 1317
37b08e34
DM		 1318 if (to_put)
1319 xfrm_state_put(to_put);
1320
1da177e4
LT		 1321 if (err)
1322 return err;
1323
1324 if (!x) {
1325 xfrm_state_delete(x1);
1326 xfrm_state_put(x1);
1327 return 0;
1328 }
1329
1330 err = -EINVAL;
1331 spin_lock_bh(&x1->lock);
1332 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1333 if (x->encap && x1->encap)
1334 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1335 if (x->coaddr && x1->coaddr) {
1336 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1337 }
1338 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1339 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1340 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1341 x1->km.dying = 0;
1342
9e0d57fd 1343 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1344 if (x1->curlft.use_time)
1345 xfrm_state_check_expire(x1);
1346
1347 err = 0;
8fcbc637
TG		 1348 x->km.state = XFRM_STATE_DEAD;
1349 __xfrm_state_put(x);
1da177e4
LT		 1350 }
1351 spin_unlock_bh(&x1->lock);
1352
1353 xfrm_state_put(x1);
1354
1355 return err;
1356}
1357EXPORT_SYMBOL(xfrm_state_update);
1358
1359int xfrm_state_check_expire(struct xfrm_state *x)
1360{
1361 if (!x->curlft.use_time)
9d729f72 1362 x->curlft.use_time = get_seconds();
1da177e4
LT		 1363
1364 if (x->km.state != XFRM_STATE_VALID)
1365 return -EINVAL;
1366
1367 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1368 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1369 x->km.state = XFRM_STATE_EXPIRED;
9e0d57fd 1370 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1da177e4
LT		 1371 return -EINVAL;
1372 }
1373
1374 if (!x->km.dying &&
1375 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1376 x->curlft.packets >= x->lft.soft_packet_limit)) {
1377 x->km.dying = 1;
53bc6b4d 1378 km_state_expired(x, 0, 0);
4666faab 1379 }
1da177e4
LT		 1380 return 0;
1381}
1382EXPORT_SYMBOL(xfrm_state_check_expire);
1383
1da177e4 1384struct xfrm_state *
a70486f0 1385xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
bd55775c 1386 u8 proto, unsigned short family)
1da177e4
LT		 1387{
1388 struct xfrm_state *x;
1da177e4
LT		 1389
1390 spin_lock_bh(&xfrm_state_lock);
bd55775c 1391 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1da177e4 1392 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1393 return x;
1394}
1395EXPORT_SYMBOL(xfrm_state_lookup);
1396
1397struct xfrm_state *
bd55775c 1398xfrm_state_lookup_byaddr(struct net *net, u32 mark,
a70486f0 1399 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
eb2971b6
MN		 1400 u8 proto, unsigned short family)
1401{
1402 struct xfrm_state *x;
eb2971b6
MN		 1403
1404 spin_lock_bh(&xfrm_state_lock);
bd55775c 1405 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
eb2971b6 1406 spin_unlock_bh(&xfrm_state_lock);
eb2971b6
MN		 1407 return x;
1408}
1409EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1410
1411struct xfrm_state *
bd55775c 1412xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
a70486f0 1413 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1da177e4
LT		 1414 int create, unsigned short family)
1415{
1416 struct xfrm_state *x;
1da177e4
LT		 1417
1418 spin_lock_bh(&xfrm_state_lock);
bd55775c 1419 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1da177e4 1420 spin_unlock_bh(&xfrm_state_lock);
2770834c 1421
1da177e4
LT		 1422 return x;
1423}
1424EXPORT_SYMBOL(xfrm_find_acq);
1425
41a49cc3
MN		 1426#ifdef CONFIG_XFRM_SUB_POLICY
1427int
1428xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1429 unsigned short family)
1430{
1431 int err = 0;
1432 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1433 if (!afinfo)
1434 return -EAFNOSUPPORT;
1435
1436 spin_lock_bh(&xfrm_state_lock);
1437 if (afinfo->tmpl_sort)
1438 err = afinfo->tmpl_sort(dst, src, n);
1439 spin_unlock_bh(&xfrm_state_lock);
1440 xfrm_state_put_afinfo(afinfo);
1441 return err;
1442}
1443EXPORT_SYMBOL(xfrm_tmpl_sort);
1444
1445int
1446xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1447 unsigned short family)
1448{
1449 int err = 0;
1450 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1451 if (!afinfo)
1452 return -EAFNOSUPPORT;
1453
1454 spin_lock_bh(&xfrm_state_lock);
1455 if (afinfo->state_sort)
1456 err = afinfo->state_sort(dst, src, n);
1457 spin_unlock_bh(&xfrm_state_lock);
1458 xfrm_state_put_afinfo(afinfo);
1459 return err;
1460}
1461EXPORT_SYMBOL(xfrm_state_sort);
1462#endif
1463
1da177e4
LT		 1464/* Silly enough, but I'm lazy to build resolution list */
1465
bd55775c 1466static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1467{
1468 int i;
1da177e4 1469
5447c5e4 1470 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1471 struct hlist_node *entry;
1472 struct xfrm_state *x;
1473
5447c5e4 1474 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
8f126e37 1475 if (x->km.seq == seq &&
3d6acfa7 1476 (mark & x->mark.m) == x->mark.v &&
8f126e37 1477 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1478 xfrm_state_hold(x);
1479 return x;
1480 }
1481 }
1482 }
1483 return NULL;
1484}
1485
bd55775c 1486struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1487{
1488 struct xfrm_state *x;
1489
1490 spin_lock_bh(&xfrm_state_lock);
bd55775c 1491 x = __xfrm_find_acq_byseq(net, mark, seq);
1da177e4
LT		 1492 spin_unlock_bh(&xfrm_state_lock);
1493 return x;
1494}
1495EXPORT_SYMBOL(xfrm_find_acq_byseq);
1496
1497u32 xfrm_get_acqseq(void)
1498{
1499 u32 res;
6836b9bd 1500 static atomic_t acqseq;
1501
1502 do {
1503 res = atomic_inc_return(&acqseq);
1504 } while (!res);
1da177e4 1505
1da177e4
LT		 1506 return res;
1507}
1508EXPORT_SYMBOL(xfrm_get_acqseq);
1509
658b219e 1510int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1511{
221df1ed 1512 struct net *net = xs_net(x);
f034b5d4 1513 unsigned int h;
1da177e4 1514 struct xfrm_state *x0;
658b219e
HX		 1515 int err = -ENOENT;
1516 __be32 minspi = htonl(low);
1517 __be32 maxspi = htonl(high);
bd55775c 1518 u32 mark = x->mark.v & x->mark.m;
1da177e4 1519
658b219e
HX		 1520 spin_lock_bh(&x->lock);
1521 if (x->km.state == XFRM_STATE_DEAD)
1522 goto unlock;
1523
1524 err = 0;
1da177e4 1525 if (x->id.spi)
658b219e
HX		 1526 goto unlock;
1527
1528 err = -ENOENT;
1da177e4
LT		 1529
1530 if (minspi == maxspi) {
bd55775c 1531 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1532 if (x0) {
1533 xfrm_state_put(x0);
658b219e 1534 goto unlock;
1da177e4
LT		 1535 }
1536 x->id.spi = minspi;
1537 } else {
1538 u32 spi = 0;
26977b4e
AV		 1539 for (h=0; h<high-low+1; h++) {
1540 spi = low + net_random()%(high-low+1);
bd55775c 1541 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1542 if (x0 == NULL) {
1543 x->id.spi = htonl(spi);
1544 break;
1545 }
1546 xfrm_state_put(x0);
1547 }
1548 }
1549 if (x->id.spi) {
1550 spin_lock_bh(&xfrm_state_lock);
12604d8a
AD		 1551 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1552 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 1553 spin_unlock_bh(&xfrm_state_lock);
658b219e
HX		 1554
1555 err = 0;
1da177e4 1556 }
658b219e
HX		 1557
1558unlock:
1559 spin_unlock_bh(&x->lock);
1560
1561 return err;
1da177e4
LT		 1562}
1563EXPORT_SYMBOL(xfrm_alloc_spi);
1564
284fa7da 1565int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1566 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1567 void *data)
1568{
12a169e7
HX		 1569 struct xfrm_state *state;
1570 struct xfrm_state_walk *x;
1da177e4
LT		 1571 int err = 0;
1572
12a169e7 1573 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1574 return 0;
1575
1da177e4 1576 spin_lock_bh(&xfrm_state_lock);
12a169e7 1577 if (list_empty(&walk->all))
284fa7da 1578 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1579 else
1580 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1581 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1582 if (x->state == XFRM_STATE_DEAD)
4c563f76 1583 continue;
12a169e7
HX		 1584 state = container_of(x, struct xfrm_state, km);
1585 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1586 continue;
12a169e7
HX		 1587 err = func(state, walk->seq, data);
1588 if (err) {
1589 list_move_tail(&walk->all, &x->all);
1590 goto out;
1da177e4 1591 }
12a169e7 1592 walk->seq++;
1da177e4 1593 }
12a169e7 1594 if (walk->seq == 0) {
1da177e4
LT		 1595 err = -ENOENT;
1596 goto out;
1597 }
12a169e7 1598 list_del_init(&walk->all);
1da177e4
LT		 1599out:
1600 spin_unlock_bh(&xfrm_state_lock);
1601 return err;
1602}
1603EXPORT_SYMBOL(xfrm_state_walk);
1604
5c182458
HX		 1605void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1606{
12a169e7 1607 INIT_LIST_HEAD(&walk->all);
5c182458 1608 walk->proto = proto;
12a169e7
HX		 1609 walk->state = XFRM_STATE_DEAD;
1610 walk->seq = 0;
5c182458
HX		 1611}
1612EXPORT_SYMBOL(xfrm_state_walk_init);
1613
abb81c4f
HX		 1614void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1615{
12a169e7 1616 if (list_empty(&walk->all))
5c182458 1617 return;
5c182458 1618
12a169e7
HX		 1619 spin_lock_bh(&xfrm_state_lock);
1620 list_del(&walk->all);
7d0b591c 1621 spin_unlock_bh(&xfrm_state_lock);
abb81c4f
HX		 1622}
1623EXPORT_SYMBOL(xfrm_state_walk_done);
1624
f8cd5488
JHS		 1625static void xfrm_replay_timer_handler(unsigned long data)
1626{
1627 struct xfrm_state *x = (struct xfrm_state*)data;
1628
1629 spin_lock(&x->lock);
1630
2717096a 1631 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1632 if (xfrm_aevent_is_on(xs_net(x)))
9fdc4883 1633 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
2717096a
JHS		 1634 else
1635 x->xflags |= XFRM_TIME_DEFER;
1636 }
f8cd5488
JHS		 1637
1638 spin_unlock(&x->lock);
1639}
1640
df01812e 1641static LIST_HEAD(xfrm_km_list);
1da177e4
LT		 1642static DEFINE_RWLOCK(xfrm_km_lock);
1643
214e005b 1644void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4
LT		 1645{
1646 struct xfrm_mgr *km;
1647
26b15dad
JHS		 1648 read_lock(&xfrm_km_lock);
1649 list_for_each_entry(km, &xfrm_km_list, list)
1650 if (km->notify_policy)
1651 km->notify_policy(xp, dir, c);
1652 read_unlock(&xfrm_km_lock);
1653}
1da177e4 1654
214e005b 1655void km_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1656{
1657 struct xfrm_mgr *km;
1da177e4
LT		 1658 read_lock(&xfrm_km_lock);
1659 list_for_each_entry(km, &xfrm_km_list, list)
26b15dad
JHS		 1660 if (km->notify)
1661 km->notify(x, c);
1da177e4 1662 read_unlock(&xfrm_km_lock);
26b15dad
JHS		 1663}
1664
1665EXPORT_SYMBOL(km_policy_notify);
1666EXPORT_SYMBOL(km_state_notify);
1667
53bc6b4d 1668void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
26b15dad 1669{
98806f75 1670 struct net *net = xs_net(x);
26b15dad
JHS		 1671 struct km_event c;
1672
bf08867f 1673 c.data.hard = hard;
53bc6b4d 1674 c.pid = pid;
f60f6b8f 1675 c.event = XFRM_MSG_EXPIRE;
26b15dad 1676 km_state_notify(x, &c);
1da177e4
LT		 1677
1678 if (hard)
98806f75 1679 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1680}
1681
53bc6b4d 1682EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1683/*
1684 * We send to all registered managers regardless of failure
1685 * We are happy with one success
1686*/
980ebd25 1687int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1688{
26b15dad 1689 int err = -EINVAL, acqret;
1da177e4
LT		 1690 struct xfrm_mgr *km;
1691
1692 read_lock(&xfrm_km_lock);
1693 list_for_each_entry(km, &xfrm_km_list, list) {
26b15dad
JHS		 1694 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1695 if (!acqret)
1696 err = acqret;
1da177e4
LT		 1697 }
1698 read_unlock(&xfrm_km_lock);
1699 return err;
1700}
980ebd25 1701EXPORT_SYMBOL(km_query);
1da177e4 1702
5d36b180 1703int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1704{
1705 int err = -EINVAL;
1706 struct xfrm_mgr *km;
1707
1708 read_lock(&xfrm_km_lock);
1709 list_for_each_entry(km, &xfrm_km_list, list) {
1710 if (km->new_mapping)
1711 err = km->new_mapping(x, ipaddr, sport);
1712 if (!err)
1713 break;
1714 }
1715 read_unlock(&xfrm_km_lock);
1716 return err;
1717}
1718EXPORT_SYMBOL(km_new_mapping);
1719
6c5c8ca7 1720void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1da177e4 1721{
98806f75 1722 struct net *net = xp_net(pol);
26b15dad 1723 struct km_event c;
1da177e4 1724
bf08867f 1725 c.data.hard = hard;
6c5c8ca7 1726 c.pid = pid;
f60f6b8f 1727 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1728 km_policy_notify(pol, dir, &c);
1da177e4
LT		 1729
1730 if (hard)
98806f75 1731 wake_up(&net->xfrm.km_waitq);
1da177e4 1732}
a70fcb0b 1733EXPORT_SYMBOL(km_policy_expired);
1da177e4 1734
2d60abc2 1735#ifdef CONFIG_XFRM_MIGRATE
183cad12
DM		 1736int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1737 const struct xfrm_migrate *m, int num_migrate,
1738 const struct xfrm_kmaddress *k)
80c9abaa
SS		 1739{
1740 int err = -EINVAL;
1741 int ret;
1742 struct xfrm_mgr *km;
1743
1744 read_lock(&xfrm_km_lock);
1745 list_for_each_entry(km, &xfrm_km_list, list) {
1746 if (km->migrate) {
13c1d189 1747 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1748 if (!ret)
1749 err = ret;
1750 }
1751 }
1752 read_unlock(&xfrm_km_lock);
1753 return err;
1754}
1755EXPORT_SYMBOL(km_migrate);
2d60abc2 1756#endif
80c9abaa 1757
db983c11 1758int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1759{
1760 int err = -EINVAL;
1761 int ret;
1762 struct xfrm_mgr *km;
1763
1764 read_lock(&xfrm_km_lock);
1765 list_for_each_entry(km, &xfrm_km_list, list) {
1766 if (km->report) {
db983c11 1767 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1768 if (!ret)
1769 err = ret;
1770 }
1771 }
1772 read_unlock(&xfrm_km_lock);
1773 return err;
1774}
1775EXPORT_SYMBOL(km_report);
1776
1da177e4
LT		 1777int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1778{
1779 int err;
1780 u8 *data;
1781 struct xfrm_mgr *km;
1782 struct xfrm_policy *pol = NULL;
1783
1784 if (optlen <= 0 || optlen > PAGE_SIZE)
1785 return -EMSGSIZE;
1786
1787 data = kmalloc(optlen, GFP_KERNEL);
1788 if (!data)
1789 return -ENOMEM;
1790
1791 err = -EFAULT;
1792 if (copy_from_user(data, optval, optlen))
1793 goto out;
1794
1795 err = -EINVAL;
1796 read_lock(&xfrm_km_lock);
1797 list_for_each_entry(km, &xfrm_km_list, list) {
cb969f07 1798 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1799 optlen, &err);
1800 if (err >= 0)
1801 break;
1802 }
1803 read_unlock(&xfrm_km_lock);
1804
1805 if (err >= 0) {
1806 xfrm_sk_policy_insert(sk, err, pol);
1807 xfrm_pol_put(pol);
1808 err = 0;
1809 }
1810
1811out:
1812 kfree(data);
1813 return err;
1814}
1815EXPORT_SYMBOL(xfrm_user_policy);
1816
1817int xfrm_register_km(struct xfrm_mgr *km)
1818{
1819 write_lock_bh(&xfrm_km_lock);
1820 list_add_tail(&km->list, &xfrm_km_list);
1821 write_unlock_bh(&xfrm_km_lock);
1822 return 0;
1823}
1824EXPORT_SYMBOL(xfrm_register_km);
1825
1826int xfrm_unregister_km(struct xfrm_mgr *km)
1827{
1828 write_lock_bh(&xfrm_km_lock);
1829 list_del(&km->list);
1830 write_unlock_bh(&xfrm_km_lock);
1831 return 0;
1832}
1833EXPORT_SYMBOL(xfrm_unregister_km);
1834
1835int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1836{
1837 int err = 0;
1838 if (unlikely(afinfo == NULL))
1839 return -EINVAL;
1840 if (unlikely(afinfo->family >= NPROTO))
1841 return -EAFNOSUPPORT;
f3111502 1842 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1843 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1844 err = -ENOBUFS;
edcd5821 1845 else
1da177e4 1846 xfrm_state_afinfo[afinfo->family] = afinfo;
f3111502 1847 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1848 return err;
1849}
1850EXPORT_SYMBOL(xfrm_state_register_afinfo);
1851
1852int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1853{
1854 int err = 0;
1855 if (unlikely(afinfo == NULL))
1856 return -EINVAL;
1857 if (unlikely(afinfo->family >= NPROTO))
1858 return -EAFNOSUPPORT;
f3111502 1859 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1860 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1861 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1862 err = -EINVAL;
edcd5821 1863 else
1da177e4 1864 xfrm_state_afinfo[afinfo->family] = NULL;
1da177e4 1865 }
f3111502 1866 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1867 return err;
1868}
1869EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1870
17c2a42a 1871static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1872{
1873 struct xfrm_state_afinfo *afinfo;
1874 if (unlikely(family >= NPROTO))
1875 return NULL;
1876 read_lock(&xfrm_state_afinfo_lock);
1877 afinfo = xfrm_state_afinfo[family];
546be240
HX		 1878 if (unlikely(!afinfo))
1879 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1880 return afinfo;
1881}
1882
17c2a42a 1883static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 1884 __releases(xfrm_state_afinfo_lock)
1da177e4 1885{
546be240 1886 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1887}
1888
1889/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1890void xfrm_state_delete_tunnel(struct xfrm_state *x)
1891{
1892 if (x->tunnel) {
1893 struct xfrm_state *t = x->tunnel;
1894
1895 if (atomic_read(&t->tunnel_users) == 2)
1896 xfrm_state_delete(t);
1897 atomic_dec(&t->tunnel_users);
1898 xfrm_state_put(t);
1899 x->tunnel = NULL;
1900 }
1901}
1902EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1903
1904int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1905{
c5c25238 1906 int res;
1da177e4 1907
c5c25238
PM		 1908 spin_lock_bh(&x->lock);
1909 if (x->km.state == XFRM_STATE_VALID &&
1910 x->type && x->type->get_mtu)
1911 res = x->type->get_mtu(x, mtu);
1912 else
28121617 1913 res = mtu - x->props.header_len;
c5c25238 1914 spin_unlock_bh(&x->lock);
1da177e4
LT		 1915 return res;
1916}
1917
a454f0cc 1918int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
72cb6962 1919{
d094cd83 1920 struct xfrm_state_afinfo *afinfo;
df9dcb45 1921 struct xfrm_mode *inner_mode;
d094cd83 1922 int family = x->props.family;
72cb6962
HX		 1923 int err;
1924
d094cd83
HX		 1925 err = -EAFNOSUPPORT;
1926 afinfo = xfrm_state_get_afinfo(family);
1927 if (!afinfo)
1928 goto error;
1929
1930 err = 0;
1931 if (afinfo->init_flags)
1932 err = afinfo->init_flags(x);
1933
1934 xfrm_state_put_afinfo(afinfo);
1935
1936 if (err)
1937 goto error;
1938
1939 err = -EPROTONOSUPPORT;
13996378 1940
df9dcb45
KM		 1941 if (x->sel.family != AF_UNSPEC) {
1942 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1943 if (inner_mode == NULL)
1944 goto error;
1945
1946 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
1947 family != x->sel.family) {
1948 xfrm_put_mode(inner_mode);
1949 goto error;
1950 }
1951
1952 x->inner_mode = inner_mode;
1953 } else {
1954 struct xfrm_mode *inner_mode_iaf;
d81d2285 1955 int iafamily = AF_INET;
df9dcb45 1956
d81d2285 1957 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 1958 if (inner_mode == NULL)
1959 goto error;
1960
1961 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
1962 xfrm_put_mode(inner_mode);
1963 goto error;
1964 }
d81d2285 1965 x->inner_mode = inner_mode;
df9dcb45 1966
d81d2285
MW		 1967 if (x->props.family == AF_INET)
1968 iafamily = AF_INET6;
df9dcb45 1969
d81d2285
MW		 1970 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
1971 if (inner_mode_iaf) {
1972 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
1973 x->inner_mode_iaf = inner_mode_iaf;
1974 else
1975 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 1976 }
1977 }
13996378 1978
d094cd83 1979 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 1980 if (x->type == NULL)
1981 goto error;
1982
1983 err = x->type->init_state(x);
1984 if (err)
1985 goto error;
1986
13996378
HX		 1987 x->outer_mode = xfrm_get_mode(x->props.mode, family);
1988 if (x->outer_mode == NULL)
b59f45d0
HX		 1989 goto error;
1990
a454f0cc
WY		 1991 if (init_replay) {
1992 err = xfrm_init_replay(x);
1993 if (err)
1994 goto error;
1995 }
1996
72cb6962
HX		 1997 x->km.state = XFRM_STATE_VALID;
1998
1999error:
2000 return err;
2001}
2002
a454f0cc
WY		 2003EXPORT_SYMBOL(__xfrm_init_state);
2004
2005int xfrm_init_state(struct xfrm_state *x)
2006{
2007 return __xfrm_init_state(x, true);
2008}
2009
72cb6962 2010EXPORT_SYMBOL(xfrm_init_state);
a716c119 2011
d62ddc21 2012int __net_init xfrm_state_init(struct net *net)
1da177e4 2013{
f034b5d4
DM		 2014 unsigned int sz;
2015
9d4139c7
AD		 2016 INIT_LIST_HEAD(&net->xfrm.state_all);
2017
f034b5d4
DM		 2018 sz = sizeof(struct hlist_head) * 8;
2019
73d189dc
AD		 2020 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2021 if (!net->xfrm.state_bydst)
2022 goto out_bydst;
d320bbb3
AD		 2023 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2024 if (!net->xfrm.state_bysrc)
2025 goto out_bysrc;
b754a4fd
AD		 2026 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2027 if (!net->xfrm.state_byspi)
2028 goto out_byspi;
529983ec 2029 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2030
0bf7c5b0 2031 net->xfrm.state_num = 0;
63082733 2032 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2033 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2034 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
50a30657 2035 init_waitqueue_head(&net->xfrm.km_waitq);
d62ddc21 2036 return 0;
73d189dc 2037
b754a4fd
AD		 2038out_byspi:
2039 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2040out_bysrc:
2041 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2042out_bydst:
2043 return -ENOMEM;
d62ddc21
AD		 2044}
2045
2046void xfrm_state_fini(struct net *net)
2047{
7c2776ee 2048 struct xfrm_audit audit_info;
73d189dc
AD		 2049 unsigned int sz;
2050
7c2776ee
AD		 2051 flush_work(&net->xfrm.state_hash_work);
2052 audit_info.loginuid = -1;
2053 audit_info.sessionid = -1;
2054 audit_info.secid = 0;
2055 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2056 flush_work(&net->xfrm.state_gc_work);
2057
9d4139c7 2058 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2059
529983ec 2060 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2061 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2062 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2063 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2064 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2065 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2066 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2067}
2068
ab5f5e8b 2069#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2070static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2071 struct audit_buffer *audit_buf)
ab5f5e8b 2072{
68277acc
PM		 2073 struct xfrm_sec_ctx *ctx = x->security;
2074 u32 spi = ntohl(x->id.spi);
2075
2076 if (ctx)
ab5f5e8b 2077 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2078 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2079
2080 switch(x->props.family) {
2081 case AF_INET:
21454aaa
HH		 2082 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2083 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2084 break;
2085 case AF_INET6:
5b095d98 2086 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2087 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2088 break;
2089 }
68277acc
PM		 2090
2091 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2092}
2093
cf35f43e
IJ		 2094static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2095 struct audit_buffer *audit_buf)
afeb14b4 2096{
b71d1d42
ED		 2097 const struct iphdr *iph4;
2098 const struct ipv6hdr *iph6;
afeb14b4
PM		 2099
2100 switch (family) {
2101 case AF_INET:
2102 iph4 = ip_hdr(skb);
21454aaa
HH		 2103 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2104 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2105 break;
2106 case AF_INET6:
2107 iph6 = ipv6_hdr(skb);
2108 audit_log_format(audit_buf,
5b095d98 2109 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2110 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2111 iph6->flow_lbl[0] & 0x0f,
2112 iph6->flow_lbl[1],
2113 iph6->flow_lbl[2]);
2114 break;
2115 }
2116}
2117
68277acc 2118void xfrm_audit_state_add(struct xfrm_state *x, int result,
2532386f 2119 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2120{
2121 struct audit_buffer *audit_buf;
ab5f5e8b 2122
afeb14b4 2123 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2124 if (audit_buf == NULL)
2125 return;
2532386f 2126 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2127 xfrm_audit_helper_sainfo(x, audit_buf);
2128 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2129 audit_log_end(audit_buf);
2130}
2131EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2132
68277acc 2133void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2532386f 2134 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2135{
2136 struct audit_buffer *audit_buf;
ab5f5e8b 2137
afeb14b4 2138 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2139 if (audit_buf == NULL)
2140 return;
2532386f 2141 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2142 xfrm_audit_helper_sainfo(x, audit_buf);
2143 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2144 audit_log_end(audit_buf);
2145}
2146EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2147
2148void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2149 struct sk_buff *skb)
2150{
2151 struct audit_buffer *audit_buf;
2152 u32 spi;
2153
2154 audit_buf = xfrm_audit_start("SA-replay-overflow");
2155 if (audit_buf == NULL)
2156 return;
2157 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2158 /* don't record the sequence number because it's inherent in this kind
2159 * of audit message */
2160 spi = ntohl(x->id.spi);
2161 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2162 audit_log_end(audit_buf);
2163}
2164EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2165
9fdc4883 2166void xfrm_audit_state_replay(struct xfrm_state *x,
afeb14b4
PM		 2167 struct sk_buff *skb, __be32 net_seq)
2168{
2169 struct audit_buffer *audit_buf;
2170 u32 spi;
2171
2172 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2173 if (audit_buf == NULL)
2174 return;
2175 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2176 spi = ntohl(x->id.spi);
2177 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2178 spi, spi, ntohl(net_seq));
2179 audit_log_end(audit_buf);
2180}
9fdc4883 2181EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
afeb14b4
PM		 2182
2183void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2184{
2185 struct audit_buffer *audit_buf;
2186
2187 audit_buf = xfrm_audit_start("SA-notfound");
2188 if (audit_buf == NULL)
2189 return;
2190 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2191 audit_log_end(audit_buf);
2192}
2193EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2194
2195void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2196 __be32 net_spi, __be32 net_seq)
2197{
2198 struct audit_buffer *audit_buf;
2199 u32 spi;
2200
2201 audit_buf = xfrm_audit_start("SA-notfound");
2202 if (audit_buf == NULL)
2203 return;
2204 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2205 spi = ntohl(net_spi);
2206 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2207 spi, spi, ntohl(net_seq));
2208 audit_log_end(audit_buf);
2209}
2210EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2211
2212void xfrm_audit_state_icvfail(struct xfrm_state *x,
2213 struct sk_buff *skb, u8 proto)
2214{
2215 struct audit_buffer *audit_buf;
2216 __be32 net_spi;
2217 __be32 net_seq;
2218
2219 audit_buf = xfrm_audit_start("SA-icv-failure");
2220 if (audit_buf == NULL)
2221 return;
2222 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2223 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2224 u32 spi = ntohl(net_spi);
2225 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2226 spi, spi, ntohl(net_seq));
2227 }
2228 audit_log_end(audit_buf);
2229}
2230EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2231#endif /* CONFIG_AUDITSYSCALL */
Linux kernel - Deliverables
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