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xfrm: SA lookups signature with mark
[linux-2.6-block.git] / net / xfrm / xfrm_state.c
CommitLineData
1da177e4
LT		 1/*
2 * xfrm_state.c
3 *
4 * Changes:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
df71837d 13 *
1da177e4
LT		 14 */
15
16#include <linux/workqueue.h>
17#include <net/xfrm.h>
18#include <linux/pfkeyv2.h>
19#include <linux/ipsec.h>
20#include <linux/module.h>
f034b5d4 21#include <linux/cache.h>
68277acc 22#include <linux/audit.h>
b5890d8b 23#include <asm/uaccess.h>
9e0d57fd
YP		 24#include <linux/ktime.h>
25#include <linux/interrupt.h>
26#include <linux/kernel.h>
1da177e4 27
44e36b42
DM		 28#include "xfrm_hash.h"
29
1da177e4
LT		 30/* Each xfrm_state may be linked to two tables:
31
32 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 33 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 34 destination/tunnel endpoint. (output)
35 */
36
37static DEFINE_SPINLOCK(xfrm_state_lock);
38
f034b5d4 39static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
9d4a706d 40static unsigned int xfrm_state_genid;
f034b5d4 41
17c2a42a
HX		 42static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
43static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
44
afeb14b4
PM		 45#ifdef CONFIG_AUDITSYSCALL
46static void xfrm_audit_state_replay(struct xfrm_state *x,
47 struct sk_buff *skb, __be32 net_seq);
48#else
49#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
50#endif /* CONFIG_AUDITSYSCALL */
51
64d0cd00
AD		 52static inline unsigned int xfrm_dst_hash(struct net *net,
53 xfrm_address_t *daddr,
c1969f29
DM		 54 xfrm_address_t *saddr,
55 u32 reqid,
a624c108 56 unsigned short family)
f034b5d4 57{
64d0cd00 58 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 59}
60
64d0cd00
AD		 61static inline unsigned int xfrm_src_hash(struct net *net,
62 xfrm_address_t *daddr,
667bbcb6 63 xfrm_address_t *saddr,
44e36b42 64 unsigned short family)
f034b5d4 65{
64d0cd00 66 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 67}
68
f034b5d4 69static inline unsigned int
64d0cd00 70xfrm_spi_hash(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
f034b5d4 71{
64d0cd00 72 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 73}
74
f034b5d4
DM		 75static void xfrm_hash_transfer(struct hlist_head *list,
76 struct hlist_head *ndsttable,
77 struct hlist_head *nsrctable,
78 struct hlist_head *nspitable,
79 unsigned int nhashmask)
80{
81 struct hlist_node *entry, *tmp;
82 struct xfrm_state *x;
83
84 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
85 unsigned int h;
86
c1969f29
DM		 87 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
88 x->props.reqid, x->props.family,
89 nhashmask);
f034b5d4
DM		 90 hlist_add_head(&x->bydst, ndsttable+h);
91
667bbcb6
MN		 92 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
93 x->props.family,
f034b5d4
DM		 94 nhashmask);
95 hlist_add_head(&x->bysrc, nsrctable+h);
96
7b4dc360
MN		 97 if (x->id.spi) {
98 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
99 x->id.proto, x->props.family,
100 nhashmask);
101 hlist_add_head(&x->byspi, nspitable+h);
102 }
f034b5d4
DM		 103 }
104}
105
63082733 106static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 107{
63082733 108 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 109}
110
111static DEFINE_MUTEX(hash_resize_mutex);
112
63082733 113static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 114{
63082733 115 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 116 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
117 unsigned long nsize, osize;
118 unsigned int nhashmask, ohashmask;
119 int i;
120
121 mutex_lock(&hash_resize_mutex);
122
63082733 123 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 124 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 125 if (!ndst)
126 goto out_unlock;
44e36b42 127 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 128 if (!nsrc) {
44e36b42 129 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 130 goto out_unlock;
131 }
44e36b42 132 nspi = xfrm_hash_alloc(nsize);
f034b5d4 133 if (!nspi) {
44e36b42
DM		 134 xfrm_hash_free(ndst, nsize);
135 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 136 goto out_unlock;
137 }
138
139 spin_lock_bh(&xfrm_state_lock);
140
141 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 142 for (i = net->xfrm.state_hmask; i >= 0; i--)
143 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 144 nhashmask);
145
63082733
AD		 146 odst = net->xfrm.state_bydst;
147 osrc = net->xfrm.state_bysrc;
148 ospi = net->xfrm.state_byspi;
149 ohashmask = net->xfrm.state_hmask;
f034b5d4 150
63082733
AD		 151 net->xfrm.state_bydst = ndst;
152 net->xfrm.state_bysrc = nsrc;
153 net->xfrm.state_byspi = nspi;
154 net->xfrm.state_hmask = nhashmask;
f034b5d4
DM		 155
156 spin_unlock_bh(&xfrm_state_lock);
157
158 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 159 xfrm_hash_free(odst, osize);
160 xfrm_hash_free(osrc, osize);
161 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 162
163out_unlock:
164 mutex_unlock(&hash_resize_mutex);
165}
166
1da177e4
LT		 167static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
168static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
169
1da177e4
LT		 170static DEFINE_SPINLOCK(xfrm_state_gc_lock);
171
53bc6b4d 172int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 173
980ebd25 174int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
53bc6b4d 175void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
1da177e4 176
aa5d62cc
HX		 177static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
178{
179 struct xfrm_state_afinfo *afinfo;
180 if (unlikely(family >= NPROTO))
181 return NULL;
182 write_lock_bh(&xfrm_state_afinfo_lock);
183 afinfo = xfrm_state_afinfo[family];
184 if (unlikely(!afinfo))
185 write_unlock_bh(&xfrm_state_afinfo_lock);
186 return afinfo;
187}
188
189static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 190 __releases(xfrm_state_afinfo_lock)
aa5d62cc
HX		 191{
192 write_unlock_bh(&xfrm_state_afinfo_lock);
193}
194
533cb5b0 195int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 196{
197 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 198 const struct xfrm_type **typemap;
aa5d62cc
HX		 199 int err = 0;
200
201 if (unlikely(afinfo == NULL))
202 return -EAFNOSUPPORT;
203 typemap = afinfo->type_map;
204
205 if (likely(typemap[type->proto] == NULL))
206 typemap[type->proto] = type;
207 else
208 err = -EEXIST;
209 xfrm_state_unlock_afinfo(afinfo);
210 return err;
211}
212EXPORT_SYMBOL(xfrm_register_type);
213
533cb5b0 214int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 215{
216 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 217 const struct xfrm_type **typemap;
aa5d62cc
HX		 218 int err = 0;
219
220 if (unlikely(afinfo == NULL))
221 return -EAFNOSUPPORT;
222 typemap = afinfo->type_map;
223
224 if (unlikely(typemap[type->proto] != type))
225 err = -ENOENT;
226 else
227 typemap[type->proto] = NULL;
228 xfrm_state_unlock_afinfo(afinfo);
229 return err;
230}
231EXPORT_SYMBOL(xfrm_unregister_type);
232
533cb5b0 233static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 234{
235 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 236 const struct xfrm_type **typemap;
237 const struct xfrm_type *type;
aa5d62cc
HX		 238 int modload_attempted = 0;
239
240retry:
241 afinfo = xfrm_state_get_afinfo(family);
242 if (unlikely(afinfo == NULL))
243 return NULL;
244 typemap = afinfo->type_map;
245
246 type = typemap[proto];
247 if (unlikely(type && !try_module_get(type->owner)))
248 type = NULL;
249 if (!type && !modload_attempted) {
250 xfrm_state_put_afinfo(afinfo);
251 request_module("xfrm-type-%d-%d", family, proto);
252 modload_attempted = 1;
253 goto retry;
254 }
255
256 xfrm_state_put_afinfo(afinfo);
257 return type;
258}
259
533cb5b0 260static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 261{
262 module_put(type->owner);
263}
264
265int xfrm_register_mode(struct xfrm_mode *mode, int family)
266{
267 struct xfrm_state_afinfo *afinfo;
268 struct xfrm_mode **modemap;
269 int err;
270
271 if (unlikely(mode->encap >= XFRM_MODE_MAX))
272 return -EINVAL;
273
274 afinfo = xfrm_state_lock_afinfo(family);
275 if (unlikely(afinfo == NULL))
276 return -EAFNOSUPPORT;
277
278 err = -EEXIST;
279 modemap = afinfo->mode_map;
17c2a42a
HX		 280 if (modemap[mode->encap])
281 goto out;
aa5d62cc 282
17c2a42a
HX		 283 err = -ENOENT;
284 if (!try_module_get(afinfo->owner))
285 goto out;
286
287 mode->afinfo = afinfo;
288 modemap[mode->encap] = mode;
289 err = 0;
290
291out:
aa5d62cc
HX		 292 xfrm_state_unlock_afinfo(afinfo);
293 return err;
294}
295EXPORT_SYMBOL(xfrm_register_mode);
296
297int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
298{
299 struct xfrm_state_afinfo *afinfo;
300 struct xfrm_mode **modemap;
301 int err;
302
303 if (unlikely(mode->encap >= XFRM_MODE_MAX))
304 return -EINVAL;
305
306 afinfo = xfrm_state_lock_afinfo(family);
307 if (unlikely(afinfo == NULL))
308 return -EAFNOSUPPORT;
309
310 err = -ENOENT;
311 modemap = afinfo->mode_map;
312 if (likely(modemap[mode->encap] == mode)) {
313 modemap[mode->encap] = NULL;
17c2a42a 314 module_put(mode->afinfo->owner);
aa5d62cc
HX		 315 err = 0;
316 }
317
318 xfrm_state_unlock_afinfo(afinfo);
319 return err;
320}
321EXPORT_SYMBOL(xfrm_unregister_mode);
322
323static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
324{
325 struct xfrm_state_afinfo *afinfo;
326 struct xfrm_mode *mode;
327 int modload_attempted = 0;
328
329 if (unlikely(encap >= XFRM_MODE_MAX))
330 return NULL;
331
332retry:
333 afinfo = xfrm_state_get_afinfo(family);
334 if (unlikely(afinfo == NULL))
335 return NULL;
336
337 mode = afinfo->mode_map[encap];
338 if (unlikely(mode && !try_module_get(mode->owner)))
339 mode = NULL;
340 if (!mode && !modload_attempted) {
341 xfrm_state_put_afinfo(afinfo);
342 request_module("xfrm-mode-%d-%d", family, encap);
343 modload_attempted = 1;
344 goto retry;
345 }
346
347 xfrm_state_put_afinfo(afinfo);
348 return mode;
349}
350
351static void xfrm_put_mode(struct xfrm_mode *mode)
352{
353 module_put(mode->owner);
354}
355
1da177e4
LT		 356static void xfrm_state_gc_destroy(struct xfrm_state *x)
357{
9e0d57fd 358 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 359 del_timer_sync(&x->rtimer);
a51482bd
JJ		 360 kfree(x->aalg);
361 kfree(x->ealg);
362 kfree(x->calg);
363 kfree(x->encap);
060f02a3 364 kfree(x->coaddr);
13996378
HX		 365 if (x->inner_mode)
366 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 367 if (x->inner_mode_iaf)
368 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 369 if (x->outer_mode)
370 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 371 if (x->type) {
372 x->type->destructor(x);
373 xfrm_put_type(x->type);
374 }
df71837d 375 security_xfrm_state_free(x);
1da177e4
LT		 376 kfree(x);
377}
378
c7837144 379static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 380{
c7837144 381 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7
HX		 382 struct xfrm_state *x;
383 struct hlist_node *entry, *tmp;
384 struct hlist_head gc_list;
1da177e4 385
1da177e4 386 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 387 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 388 spin_unlock_bh(&xfrm_state_gc_lock);
389
12a169e7 390 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
1da177e4 391 xfrm_state_gc_destroy(x);
8f126e37 392
50a30657 393 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 394}
395
396static inline unsigned long make_jiffies(long secs)
397{
398 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
399 return MAX_SCHEDULE_TIMEOUT-1;
400 else
a716c119 401 return secs*HZ;
1da177e4
LT		 402}
403
9e0d57fd 404static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
1da177e4 405{
9e0d57fd
YP		 406 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
407 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
98806f75 408 struct net *net = xs_net(x);
9d729f72 409 unsigned long now = get_seconds();
1da177e4
LT		 410 long next = LONG_MAX;
411 int warn = 0;
161a09e7 412 int err = 0;
1da177e4
LT		 413
414 spin_lock(&x->lock);
415 if (x->km.state == XFRM_STATE_DEAD)
416 goto out;
417 if (x->km.state == XFRM_STATE_EXPIRED)
418 goto expired;
419 if (x->lft.hard_add_expires_seconds) {
420 long tmo = x->lft.hard_add_expires_seconds +
421 x->curlft.add_time - now;
422 if (tmo <= 0)
423 goto expired;
424 if (tmo < next)
425 next = tmo;
426 }
427 if (x->lft.hard_use_expires_seconds) {
428 long tmo = x->lft.hard_use_expires_seconds +
429 (x->curlft.use_time ? : now) - now;
430 if (tmo <= 0)
431 goto expired;
432 if (tmo < next)
433 next = tmo;
434 }
435 if (x->km.dying)
436 goto resched;
437 if (x->lft.soft_add_expires_seconds) {
438 long tmo = x->lft.soft_add_expires_seconds +
439 x->curlft.add_time - now;
440 if (tmo <= 0)
441 warn = 1;
442 else if (tmo < next)
443 next = tmo;
444 }
445 if (x->lft.soft_use_expires_seconds) {
446 long tmo = x->lft.soft_use_expires_seconds +
447 (x->curlft.use_time ? : now) - now;
448 if (tmo <= 0)
449 warn = 1;
450 else if (tmo < next)
451 next = tmo;
452 }
453
4666faab 454 x->km.dying = warn;
1da177e4 455 if (warn)
53bc6b4d 456 km_state_expired(x, 0, 0);
1da177e4 457resched:
9e0d57fd
YP		 458 if (next != LONG_MAX){
459 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
460 }
a47f0ce0 461
1da177e4
LT		 462 goto out;
463
464expired:
465 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
466 x->km.state = XFRM_STATE_EXPIRED;
98806f75 467 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 468 next = 2;
469 goto resched;
470 }
161a09e7
JL		 471
472 err = __xfrm_state_delete(x);
473 if (!err && x->id.spi)
53bc6b4d 474 km_state_expired(x, 1, 0);
1da177e4 475
ab5f5e8b 476 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 477 audit_get_loginuid(current),
478 audit_get_sessionid(current), 0);
161a09e7 479
1da177e4
LT		 480out:
481 spin_unlock(&x->lock);
9e0d57fd 482 return HRTIMER_NORESTART;
1da177e4
LT		 483}
484
0ac84752
DM		 485static void xfrm_replay_timer_handler(unsigned long data);
486
673c09be 487struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 488{
489 struct xfrm_state *x;
490
0da974f4 491 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 492
493 if (x) {
673c09be 494 write_pnet(&x->xs_net, net);
1da177e4
LT		 495 atomic_set(&x->refcnt, 1);
496 atomic_set(&x->tunnel_users, 0);
12a169e7 497 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 498 INIT_HLIST_NODE(&x->bydst);
499 INIT_HLIST_NODE(&x->bysrc);
500 INIT_HLIST_NODE(&x->byspi);
9e0d57fd 501 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 502 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
503 (unsigned long)x);
9d729f72 504 x->curlft.add_time = get_seconds();
1da177e4
LT		 505 x->lft.soft_byte_limit = XFRM_INF;
506 x->lft.soft_packet_limit = XFRM_INF;
507 x->lft.hard_byte_limit = XFRM_INF;
508 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 509 x->replay_maxage = 0;
510 x->replay_maxdiff = 0;
df9dcb45
KM		 511 x->inner_mode = NULL;
512 x->inner_mode_iaf = NULL;
1da177e4
LT		 513 spin_lock_init(&x->lock);
514 }
515 return x;
516}
517EXPORT_SYMBOL(xfrm_state_alloc);
518
519void __xfrm_state_destroy(struct xfrm_state *x)
520{
98806f75
AD		 521 struct net *net = xs_net(x);
522
547b792c 523 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 524
525 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 526 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 527 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 528 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 529}
530EXPORT_SYMBOL(__xfrm_state_destroy);
531
53bc6b4d 532int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 533{
98806f75 534 struct net *net = xs_net(x);
26b15dad
JHS		 535 int err = -ESRCH;
536
1da177e4
LT		 537 if (x->km.state != XFRM_STATE_DEAD) {
538 x->km.state = XFRM_STATE_DEAD;
539 spin_lock(&xfrm_state_lock);
12a169e7 540 list_del(&x->km.all);
8f126e37 541 hlist_del(&x->bydst);
8f126e37 542 hlist_del(&x->bysrc);
a47f0ce0 543 if (x->id.spi)
8f126e37 544 hlist_del(&x->byspi);
98806f75 545 net->xfrm.state_num--;
1da177e4 546 spin_unlock(&xfrm_state_lock);
1da177e4 547
1da177e4
LT		 548 /* All xfrm_state objects are created by xfrm_state_alloc.
549 * The xfrm_state_alloc call gives a reference, and that
550 * is what we are dropping here.
551 */
5dba4797 552 xfrm_state_put(x);
26b15dad 553 err = 0;
1da177e4 554 }
26b15dad
JHS		 555
556 return err;
1da177e4 557}
53bc6b4d 558EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 559
26b15dad 560int xfrm_state_delete(struct xfrm_state *x)
1da177e4 561{
26b15dad
JHS		 562 int err;
563
1da177e4 564 spin_lock_bh(&x->lock);
26b15dad 565 err = __xfrm_state_delete(x);
1da177e4 566 spin_unlock_bh(&x->lock);
26b15dad
JHS		 567
568 return err;
1da177e4
LT		 569}
570EXPORT_SYMBOL(xfrm_state_delete);
571
4aa2e62c
JL		 572#ifdef CONFIG_SECURITY_NETWORK_XFRM
573static inline int
0e602451 574xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 575{
4aa2e62c
JL		 576 int i, err = 0;
577
0e602451 578 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 579 struct hlist_node *entry;
580 struct xfrm_state *x;
581
0e602451 582 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 583 if (xfrm_id_proto_match(x->id.proto, proto) &&
584 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 585 xfrm_audit_state_delete(x, 0,
586 audit_info->loginuid,
2532386f 587 audit_info->sessionid,
ab5f5e8b 588 audit_info->secid);
4aa2e62c
JL		 589 return err;
590 }
591 }
592 }
593
594 return err;
595}
596#else
597static inline int
0e602451 598xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 599{
600 return 0;
601}
602#endif
603
0e602451 604int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c 605{
9e64cc95 606 int i, err = 0, cnt = 0;
1da177e4
LT		 607
608 spin_lock_bh(&xfrm_state_lock);
0e602451 609 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 610 if (err)
611 goto out;
612
9e64cc95 613 err = -ESRCH;
0e602451 614 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 615 struct hlist_node *entry;
616 struct xfrm_state *x;
1da177e4 617restart:
0e602451 618 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1da177e4 619 if (!xfrm_state_kern(x) &&
5794708f 620 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4
LT		 621 xfrm_state_hold(x);
622 spin_unlock_bh(&xfrm_state_lock);
623
161a09e7 624 err = xfrm_state_delete(x);
ab5f5e8b
JL		 625 xfrm_audit_state_delete(x, err ? 0 : 1,
626 audit_info->loginuid,
2532386f 627 audit_info->sessionid,
ab5f5e8b 628 audit_info->secid);
1da177e4 629 xfrm_state_put(x);
9e64cc95
JHS		 630 if (!err)
631 cnt++;
1da177e4
LT		 632
633 spin_lock_bh(&xfrm_state_lock);
634 goto restart;
635 }
636 }
637 }
9e64cc95
JHS		 638 if (cnt)
639 err = 0;
4aa2e62c
JL		 640
641out:
1da177e4 642 spin_unlock_bh(&xfrm_state_lock);
0e602451 643 wake_up(&net->xfrm.km_waitq);
4aa2e62c 644 return err;
1da177e4
LT		 645}
646EXPORT_SYMBOL(xfrm_state_flush);
647
e071041b 648void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b
JHS		 649{
650 spin_lock_bh(&xfrm_state_lock);
e071041b
AD		 651 si->sadcnt = net->xfrm.state_num;
652 si->sadhcnt = net->xfrm.state_hmask;
28d8909b
JHS		 653 si->sadhmcnt = xfrm_state_hashmax;
654 spin_unlock_bh(&xfrm_state_lock);
655}
656EXPORT_SYMBOL(xfrm_sad_getinfo);
657
1da177e4
LT		 658static int
659xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
660 struct xfrm_tmpl *tmpl,
661 xfrm_address_t *daddr, xfrm_address_t *saddr,
662 unsigned short family)
663{
664 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
665 if (!afinfo)
666 return -1;
667 afinfo->init_tempsel(x, fl, tmpl, daddr, saddr);
668 xfrm_state_put_afinfo(afinfo);
669 return 0;
670}
671
bd55775c 672static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
edcd5821 673{
221df1ed 674 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821 675 struct xfrm_state *x;
8f126e37 676 struct hlist_node *entry;
edcd5821 677
221df1ed 678 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 679 if (x->props.family != family ||
680 x->id.spi != spi ||
1802571b
WY		 681 x->id.proto != proto ||
682 xfrm_addr_cmp(&x->id.daddr, daddr, family))
edcd5821
DM		 683 continue;
684
edcd5821
DM		 685 xfrm_state_hold(x);
686 return x;
687 }
688
689 return NULL;
690}
691
bd55775c 692static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family)
edcd5821 693{
221df1ed 694 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821 695 struct xfrm_state *x;
8f126e37 696 struct hlist_node *entry;
edcd5821 697
221df1ed 698 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 699 if (x->props.family != family ||
1802571b
WY		 700 x->id.proto != proto ||
701 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
702 xfrm_addr_cmp(&x->props.saddr, saddr, family))
edcd5821
DM		 703 continue;
704
edcd5821
DM		 705 xfrm_state_hold(x);
706 return x;
707 }
708
709 return NULL;
710}
711
712static inline struct xfrm_state *
713__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
714{
221df1ed 715 struct net *net = xs_net(x);
bd55775c 716 u32 mark = x->mark.v & x->mark.m;
221df1ed 717
edcd5821 718 if (use_spi)
bd55775c
JHS		 719 return __xfrm_state_lookup(net, mark, &x->id.daddr,
720 x->id.spi, x->id.proto, family);
edcd5821 721 else
bd55775c
JHS		 722 return __xfrm_state_lookup_byaddr(net, mark,
723 &x->id.daddr,
edcd5821
DM		 724 &x->props.saddr,
725 x->id.proto, family);
726}
727
98806f75 728static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 729{
730 if (have_hash_collision &&
98806f75
AD		 731 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
732 net->xfrm.state_num > net->xfrm.state_hmask)
733 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 734}
735
08ec9af1
DM		 736static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
737 struct flowi *fl, unsigned short family,
738 xfrm_address_t *daddr, xfrm_address_t *saddr,
739 struct xfrm_state **best, int *acq_in_progress,
740 int *error)
741{
742 /* Resolution logic:
743 * 1. There is a valid state with matching selector. Done.
744 * 2. Valid state with inappropriate selector. Skip.
745 *
746 * Entering area of "sysdeps".
747 *
748 * 3. If state is not valid, selector is temporary, it selects
749 * only session which triggered previous resolution. Key
750 * manager will do something to install a state with proper
751 * selector.
752 */
753 if (x->km.state == XFRM_STATE_VALID) {
754 if ((x->sel.family &&
755 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
756 !security_xfrm_state_pol_flow_match(x, pol, fl))
757 return;
758
759 if (!*best ||
760 (*best)->km.dying > x->km.dying ||
761 ((*best)->km.dying == x->km.dying &&
762 (*best)->curlft.add_time < x->curlft.add_time))
763 *best = x;
764 } else if (x->km.state == XFRM_STATE_ACQ) {
765 *acq_in_progress = 1;
766 } else if (x->km.state == XFRM_STATE_ERROR ||
767 x->km.state == XFRM_STATE_EXPIRED) {
768 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
769 security_xfrm_state_pol_flow_match(x, pol, fl))
770 *error = -ESRCH;
771 }
772}
773
1da177e4 774struct xfrm_state *
a716c119 775xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 776 struct flowi *fl, struct xfrm_tmpl *tmpl,
777 struct xfrm_policy *pol, int *err,
778 unsigned short family)
779{
08ec9af1 780 static xfrm_address_t saddr_wildcard = { };
5447c5e4 781 struct net *net = xp_net(pol);
6a783c90 782 unsigned int h, h_wildcard;
8f126e37 783 struct hlist_node *entry;
37b08e34 784 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 785 int acquire_in_progress = 0;
786 int error = 0;
787 struct xfrm_state *best = NULL;
bd55775c 788 u32 mark = pol->mark.v & pol->mark.m;
a716c119 789
37b08e34
DM		 790 to_put = NULL;
791
1da177e4 792 spin_lock_bh(&xfrm_state_lock);
5447c5e4
AD		 793 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, family);
794 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
1da177e4
LT		 795 if (x->props.family == family &&
796 x->props.reqid == tmpl->reqid &&
fbd9a5b4 797 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1da177e4
LT		 798 xfrm_state_addr_check(x, daddr, saddr, family) &&
799 tmpl->mode == x->props.mode &&
800 tmpl->id.proto == x->id.proto &&
08ec9af1
DM		 801 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
802 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
803 &best, &acquire_in_progress, &error);
804 }
805 if (best)
806 goto found;
807
6a783c90
ND		 808 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, family);
809 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
08ec9af1
DM		 810 if (x->props.family == family &&
811 x->props.reqid == tmpl->reqid &&
812 !(x->props.flags & XFRM_STATE_WILDRECV) &&
813 xfrm_state_addr_check(x, daddr, saddr, family) &&
814 tmpl->mode == x->props.mode &&
815 tmpl->id.proto == x->id.proto &&
816 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
817 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
818 &best, &acquire_in_progress, &error);
1da177e4
LT		 819 }
820
08ec9af1 821found:
1da177e4
LT		 822 x = best;
823 if (!x && !error && !acquire_in_progress) {
5c5d281a 824 if (tmpl->id.spi &&
bd55775c 825 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
edcd5821 826 tmpl->id.proto, family)) != NULL) {
37b08e34 827 to_put = x0;
1da177e4
LT		 828 error = -EEXIST;
829 goto out;
830 }
5447c5e4 831 x = xfrm_state_alloc(net);
1da177e4
LT		 832 if (x == NULL) {
833 error = -ENOMEM;
834 goto out;
835 }
836 /* Initialize temporary selector matching only
837 * to current session. */
838 xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
bd55775c 839 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1da177e4 840
e0d1caa7
VY		 841 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
842 if (error) {
843 x->km.state = XFRM_STATE_DEAD;
37b08e34 844 to_put = x;
e0d1caa7
VY		 845 x = NULL;
846 goto out;
847 }
848
1da177e4
LT		 849 if (km_query(x, tmpl, pol) == 0) {
850 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 851 list_add(&x->km.all, &net->xfrm.state_all);
852 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
853 h = xfrm_src_hash(net, daddr, saddr, family);
854 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 855 if (x->id.spi) {
5447c5e4
AD		 856 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, family);
857 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 858 }
b27aeadb 859 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 860 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 861 net->xfrm.state_num++;
862 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 863 } else {
864 x->km.state = XFRM_STATE_DEAD;
37b08e34 865 to_put = x;
1da177e4
LT		 866 x = NULL;
867 error = -ESRCH;
868 }
869 }
870out:
871 if (x)
872 xfrm_state_hold(x);
873 else
874 *err = acquire_in_progress ? -EAGAIN : error;
875 spin_unlock_bh(&xfrm_state_lock);
37b08e34
DM		 876 if (to_put)
877 xfrm_state_put(to_put);
1da177e4
LT		 878 return x;
879}
880
628529b6 881struct xfrm_state *
bd55775c 882xfrm_stateonly_find(struct net *net, u32 mark,
5447c5e4 883 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 884 unsigned short family, u8 mode, u8 proto, u32 reqid)
885{
4bda4f25 886 unsigned int h;
628529b6
JHS		 887 struct xfrm_state *rx = NULL, *x = NULL;
888 struct hlist_node *entry;
889
890 spin_lock(&xfrm_state_lock);
5447c5e4
AD		 891 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
892 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 893 if (x->props.family == family &&
894 x->props.reqid == reqid &&
895 !(x->props.flags & XFRM_STATE_WILDRECV) &&
896 xfrm_state_addr_check(x, daddr, saddr, family) &&
897 mode == x->props.mode &&
898 proto == x->id.proto &&
899 x->km.state == XFRM_STATE_VALID) {
900 rx = x;
901 break;
902 }
903 }
904
905 if (rx)
906 xfrm_state_hold(rx);
907 spin_unlock(&xfrm_state_lock);
908
909
910 return rx;
911}
912EXPORT_SYMBOL(xfrm_stateonly_find);
913
1da177e4
LT		 914static void __xfrm_state_insert(struct xfrm_state *x)
915{
98806f75 916 struct net *net = xs_net(x);
a624c108 917 unsigned int h;
1da177e4 918
9d4a706d
DM		 919 x->genid = ++xfrm_state_genid;
920
98806f75 921 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 922
98806f75 923 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 924 x->props.reqid, x->props.family);
98806f75 925 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 926
98806f75
AD		 927 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
928 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 929
7b4dc360 930 if (x->id.spi) {
98806f75 931 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 932 x->props.family);
933
98806f75 934 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 935 }
936
9e0d57fd 937 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 938 if (x->replay_maxage)
939 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 940
98806f75 941 wake_up(&net->xfrm.km_waitq);
f034b5d4 942
98806f75 943 net->xfrm.state_num++;
f034b5d4 944
98806f75 945 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 946}
947
c7f5ea3a
DM		 948/* xfrm_state_lock is held */
949static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
950{
98806f75 951 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 952 unsigned short family = xnew->props.family;
953 u32 reqid = xnew->props.reqid;
954 struct xfrm_state *x;
955 struct hlist_node *entry;
956 unsigned int h;
957
98806f75
AD		 958 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
959 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 960 if (x->props.family == family &&
961 x->props.reqid == reqid &&
c1969f29
DM		 962 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
963 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
c7f5ea3a
DM		 964 x->genid = xfrm_state_genid;
965 }
966}
967
1da177e4
LT		 968void xfrm_state_insert(struct xfrm_state *x)
969{
970 spin_lock_bh(&xfrm_state_lock);
c7f5ea3a 971 __xfrm_state_bump_genids(x);
1da177e4
LT		 972 __xfrm_state_insert(x);
973 spin_unlock_bh(&xfrm_state_lock);
974}
975EXPORT_SYMBOL(xfrm_state_insert);
976
2770834c 977/* xfrm_state_lock is held */
bd55775c 978static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m, unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create)
2770834c 979{
5447c5e4 980 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
8f126e37 981 struct hlist_node *entry;
2770834c
DM		 982 struct xfrm_state *x;
983
5447c5e4 984 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 985 if (x->props.reqid != reqid ||
986 x->props.mode != mode ||
987 x->props.family != family ||
988 x->km.state != XFRM_STATE_ACQ ||
75e252d9 989 x->id.spi != 0 ||
1802571b
WY		 990 x->id.proto != proto ||
991 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
992 xfrm_addr_cmp(&x->props.saddr, saddr, family))
2770834c
DM		 993 continue;
994
2770834c
DM		 995 xfrm_state_hold(x);
996 return x;
997 }
998
999 if (!create)
1000 return NULL;
1001
5447c5e4 1002 x = xfrm_state_alloc(net);
2770834c
DM		 1003 if (likely(x)) {
1004 switch (family) {
1005 case AF_INET:
1006 x->sel.daddr.a4 = daddr->a4;
1007 x->sel.saddr.a4 = saddr->a4;
1008 x->sel.prefixlen_d = 32;
1009 x->sel.prefixlen_s = 32;
1010 x->props.saddr.a4 = saddr->a4;
1011 x->id.daddr.a4 = daddr->a4;
1012 break;
1013
1014 case AF_INET6:
1015 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1016 (struct in6_addr *)daddr);
1017 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1018 (struct in6_addr *)saddr);
1019 x->sel.prefixlen_d = 128;
1020 x->sel.prefixlen_s = 128;
1021 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1022 (struct in6_addr *)saddr);
1023 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1024 (struct in6_addr *)daddr);
1025 break;
3ff50b79 1026 }
2770834c
DM		 1027
1028 x->km.state = XFRM_STATE_ACQ;
1029 x->id.proto = proto;
1030 x->props.family = family;
1031 x->props.mode = mode;
1032 x->props.reqid = reqid;
bd55775c
JHS		 1033 x->mark.v = m->v;
1034 x->mark.m = m->m;
b27aeadb 1035 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1036 xfrm_state_hold(x);
9e0d57fd 1037 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1038 list_add(&x->km.all, &net->xfrm.state_all);
1039 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1040 h = xfrm_src_hash(net, daddr, saddr, family);
1041 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1042
5447c5e4 1043 net->xfrm.state_num++;
918049f0 1044
5447c5e4 1045 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1046 }
1047
1048 return x;
1049}
1050
bd55775c 1051static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1052
1053int xfrm_state_add(struct xfrm_state *x)
1054{
5447c5e4 1055 struct net *net = xs_net(x);
37b08e34 1056 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1057 int family;
1058 int err;
bd55775c 1059 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1060 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1061
1062 family = x->props.family;
1da177e4 1063
37b08e34
DM		 1064 to_put = NULL;
1065
1da177e4
LT		 1066 spin_lock_bh(&xfrm_state_lock);
1067
edcd5821 1068 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1069 if (x1) {
37b08e34 1070 to_put = x1;
1da177e4
LT		 1071 x1 = NULL;
1072 err = -EEXIST;
1073 goto out;
1074 }
1075
eb2971b6 1076 if (use_spi && x->km.seq) {
bd55775c 1077 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9
JL		 1078 if (x1 && ((x1->id.proto != x->id.proto) ||
1079 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1080 to_put = x1;
1da177e4
LT		 1081 x1 = NULL;
1082 }
1083 }
1084
eb2971b6 1085 if (use_spi && !x1)
bd55775c
JHS		 1086 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1087 x->props.reqid, x->id.proto,
2770834c 1088 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1089
c7f5ea3a 1090 __xfrm_state_bump_genids(x);
1da177e4
LT		 1091 __xfrm_state_insert(x);
1092 err = 0;
1093
1094out:
1095 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1096
1097 if (x1) {
1098 xfrm_state_delete(x1);
1099 xfrm_state_put(x1);
1100 }
1101
37b08e34
DM		 1102 if (to_put)
1103 xfrm_state_put(to_put);
1104
1da177e4
LT		 1105 return err;
1106}
1107EXPORT_SYMBOL(xfrm_state_add);
1108
80c9abaa 1109#ifdef CONFIG_XFRM_MIGRATE
6666351d 1110static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1111{
98806f75 1112 struct net *net = xs_net(orig);
80c9abaa 1113 int err = -ENOMEM;
98806f75 1114 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1115 if (!x)
553f9118 1116 goto out;
80c9abaa
SS		 1117
1118 memcpy(&x->id, &orig->id, sizeof(x->id));
1119 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1120 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1121 x->props.mode = orig->props.mode;
1122 x->props.replay_window = orig->props.replay_window;
1123 x->props.reqid = orig->props.reqid;
1124 x->props.family = orig->props.family;
1125 x->props.saddr = orig->props.saddr;
1126
1127 if (orig->aalg) {
4447bb33 1128 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1129 if (!x->aalg)
1130 goto error;
1131 }
1132 x->props.aalgo = orig->props.aalgo;
1133
1134 if (orig->ealg) {
1135 x->ealg = xfrm_algo_clone(orig->ealg);
1136 if (!x->ealg)
1137 goto error;
1138 }
1139 x->props.ealgo = orig->props.ealgo;
1140
1141 if (orig->calg) {
1142 x->calg = xfrm_algo_clone(orig->calg);
1143 if (!x->calg)
1144 goto error;
1145 }
1146 x->props.calgo = orig->props.calgo;
1147
a716c119 1148 if (orig->encap) {
80c9abaa
SS		 1149 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1150 if (!x->encap)
1151 goto error;
1152 }
1153
1154 if (orig->coaddr) {
1155 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1156 GFP_KERNEL);
1157 if (!x->coaddr)
1158 goto error;
1159 }
1160
bd55775c
JHS		 1161 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1162
80c9abaa
SS		 1163 err = xfrm_init_state(x);
1164 if (err)
1165 goto error;
1166
1167 x->props.flags = orig->props.flags;
1168
1169 x->curlft.add_time = orig->curlft.add_time;
1170 x->km.state = orig->km.state;
1171 x->km.seq = orig->km.seq;
1172
1173 return x;
1174
1175 error:
553f9118
HX		 1176 xfrm_state_put(x);
1177out:
80c9abaa
SS		 1178 if (errp)
1179 *errp = err;
80c9abaa
SS		 1180 return NULL;
1181}
80c9abaa
SS		 1182
1183/* xfrm_state_lock is held */
1184struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1185{
1186 unsigned int h;
1187 struct xfrm_state *x;
1188 struct hlist_node *entry;
1189
1190 if (m->reqid) {
64d0cd00 1191 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1192 m->reqid, m->old_family);
73d189dc 1193 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1194 if (x->props.mode != m->mode ||
1195 x->id.proto != m->proto)
1196 continue;
1197 if (m->reqid && x->props.reqid != m->reqid)
1198 continue;
1199 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1200 m->old_family) ||
1201 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1202 m->old_family))
1203 continue;
1204 xfrm_state_hold(x);
1205 return x;
1206 }
1207 } else {
64d0cd00 1208 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1209 m->old_family);
d320bbb3 1210 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1211 if (x->props.mode != m->mode ||
1212 x->id.proto != m->proto)
1213 continue;
1214 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1215 m->old_family) ||
1216 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1217 m->old_family))
1218 continue;
1219 xfrm_state_hold(x);
1220 return x;
1221 }
1222 }
1223
a716c119 1224 return NULL;
80c9abaa
SS		 1225}
1226EXPORT_SYMBOL(xfrm_migrate_state_find);
1227
1228struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1229 struct xfrm_migrate *m)
1230{
1231 struct xfrm_state *xc;
1232 int err;
1233
1234 xc = xfrm_state_clone(x, &err);
1235 if (!xc)
1236 return NULL;
1237
1238 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1239 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1240
1241 /* add state */
1242 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1243 /* a care is needed when the destination address of the
1244 state is to be updated as it is a part of triplet */
1245 xfrm_state_insert(xc);
1246 } else {
1247 if ((err = xfrm_state_add(xc)) < 0)
1248 goto error;
1249 }
1250
1251 return xc;
1252error:
1253 kfree(xc);
1254 return NULL;
1255}
1256EXPORT_SYMBOL(xfrm_state_migrate);
1257#endif
1258
1da177e4
LT		 1259int xfrm_state_update(struct xfrm_state *x)
1260{
37b08e34 1261 struct xfrm_state *x1, *to_put;
1da177e4 1262 int err;
eb2971b6 1263 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4 1264
37b08e34
DM		 1265 to_put = NULL;
1266
1da177e4 1267 spin_lock_bh(&xfrm_state_lock);
edcd5821 1268 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1269
1270 err = -ESRCH;
1271 if (!x1)
1272 goto out;
1273
1274 if (xfrm_state_kern(x1)) {
37b08e34 1275 to_put = x1;
1da177e4
LT		 1276 err = -EEXIST;
1277 goto out;
1278 }
1279
1280 if (x1->km.state == XFRM_STATE_ACQ) {
1281 __xfrm_state_insert(x);
1282 x = NULL;
1283 }
1284 err = 0;
1285
1286out:
1287 spin_unlock_bh(&xfrm_state_lock);
1da177e4 1288
37b08e34
DM		 1289 if (to_put)
1290 xfrm_state_put(to_put);
1291
1da177e4
LT		 1292 if (err)
1293 return err;
1294
1295 if (!x) {
1296 xfrm_state_delete(x1);
1297 xfrm_state_put(x1);
1298 return 0;
1299 }
1300
1301 err = -EINVAL;
1302 spin_lock_bh(&x1->lock);
1303 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1304 if (x->encap && x1->encap)
1305 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1306 if (x->coaddr && x1->coaddr) {
1307 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1308 }
1309 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1310 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1311 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1312 x1->km.dying = 0;
1313
9e0d57fd 1314 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1315 if (x1->curlft.use_time)
1316 xfrm_state_check_expire(x1);
1317
1318 err = 0;
1319 }
1320 spin_unlock_bh(&x1->lock);
1321
1322 xfrm_state_put(x1);
1323
1324 return err;
1325}
1326EXPORT_SYMBOL(xfrm_state_update);
1327
1328int xfrm_state_check_expire(struct xfrm_state *x)
1329{
1330 if (!x->curlft.use_time)
9d729f72 1331 x->curlft.use_time = get_seconds();
1da177e4
LT		 1332
1333 if (x->km.state != XFRM_STATE_VALID)
1334 return -EINVAL;
1335
1336 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1337 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1338 x->km.state = XFRM_STATE_EXPIRED;
9e0d57fd 1339 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1da177e4
LT		 1340 return -EINVAL;
1341 }
1342
1343 if (!x->km.dying &&
1344 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1345 x->curlft.packets >= x->lft.soft_packet_limit)) {
1346 x->km.dying = 1;
53bc6b4d 1347 km_state_expired(x, 0, 0);
4666faab 1348 }
1da177e4
LT		 1349 return 0;
1350}
1351EXPORT_SYMBOL(xfrm_state_check_expire);
1352
1da177e4 1353struct xfrm_state *
bd55775c
JHS		 1354xfrm_state_lookup(struct net *net, u32 mark, xfrm_address_t *daddr, __be32 spi,
1355 u8 proto, unsigned short family)
1da177e4
LT		 1356{
1357 struct xfrm_state *x;
1da177e4
LT		 1358
1359 spin_lock_bh(&xfrm_state_lock);
bd55775c 1360 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1da177e4 1361 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1362 return x;
1363}
1364EXPORT_SYMBOL(xfrm_state_lookup);
1365
1366struct xfrm_state *
bd55775c 1367xfrm_state_lookup_byaddr(struct net *net, u32 mark,
221df1ed 1368 xfrm_address_t *daddr, xfrm_address_t *saddr,
eb2971b6
MN		 1369 u8 proto, unsigned short family)
1370{
1371 struct xfrm_state *x;
eb2971b6
MN		 1372
1373 spin_lock_bh(&xfrm_state_lock);
bd55775c 1374 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
eb2971b6 1375 spin_unlock_bh(&xfrm_state_lock);
eb2971b6
MN		 1376 return x;
1377}
1378EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1379
1380struct xfrm_state *
bd55775c 1381xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
a716c119 1382 xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 1383 int create, unsigned short family)
1384{
1385 struct xfrm_state *x;
1da177e4
LT		 1386
1387 spin_lock_bh(&xfrm_state_lock);
bd55775c 1388 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1da177e4 1389 spin_unlock_bh(&xfrm_state_lock);
2770834c 1390
1da177e4
LT		 1391 return x;
1392}
1393EXPORT_SYMBOL(xfrm_find_acq);
1394
41a49cc3
MN		 1395#ifdef CONFIG_XFRM_SUB_POLICY
1396int
1397xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1398 unsigned short family)
1399{
1400 int err = 0;
1401 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1402 if (!afinfo)
1403 return -EAFNOSUPPORT;
1404
1405 spin_lock_bh(&xfrm_state_lock);
1406 if (afinfo->tmpl_sort)
1407 err = afinfo->tmpl_sort(dst, src, n);
1408 spin_unlock_bh(&xfrm_state_lock);
1409 xfrm_state_put_afinfo(afinfo);
1410 return err;
1411}
1412EXPORT_SYMBOL(xfrm_tmpl_sort);
1413
1414int
1415xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1416 unsigned short family)
1417{
1418 int err = 0;
1419 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1420 if (!afinfo)
1421 return -EAFNOSUPPORT;
1422
1423 spin_lock_bh(&xfrm_state_lock);
1424 if (afinfo->state_sort)
1425 err = afinfo->state_sort(dst, src, n);
1426 spin_unlock_bh(&xfrm_state_lock);
1427 xfrm_state_put_afinfo(afinfo);
1428 return err;
1429}
1430EXPORT_SYMBOL(xfrm_state_sort);
1431#endif
1432
1da177e4
LT		 1433/* Silly enough, but I'm lazy to build resolution list */
1434
bd55775c 1435static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1436{
1437 int i;
1da177e4 1438
5447c5e4 1439 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1440 struct hlist_node *entry;
1441 struct xfrm_state *x;
1442
5447c5e4 1443 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
8f126e37
DM		 1444 if (x->km.seq == seq &&
1445 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1446 xfrm_state_hold(x);
1447 return x;
1448 }
1449 }
1450 }
1451 return NULL;
1452}
1453
bd55775c 1454struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1455{
1456 struct xfrm_state *x;
1457
1458 spin_lock_bh(&xfrm_state_lock);
bd55775c 1459 x = __xfrm_find_acq_byseq(net, mark, seq);
1da177e4
LT		 1460 spin_unlock_bh(&xfrm_state_lock);
1461 return x;
1462}
1463EXPORT_SYMBOL(xfrm_find_acq_byseq);
1464
1465u32 xfrm_get_acqseq(void)
1466{
1467 u32 res;
6836b9bd 1468 static atomic_t acqseq;
1469
1470 do {
1471 res = atomic_inc_return(&acqseq);
1472 } while (!res);
1da177e4 1473
1da177e4
LT		 1474 return res;
1475}
1476EXPORT_SYMBOL(xfrm_get_acqseq);
1477
658b219e 1478int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1479{
221df1ed 1480 struct net *net = xs_net(x);
f034b5d4 1481 unsigned int h;
1da177e4 1482 struct xfrm_state *x0;
658b219e
HX		 1483 int err = -ENOENT;
1484 __be32 minspi = htonl(low);
1485 __be32 maxspi = htonl(high);
bd55775c 1486 u32 mark = x->mark.v & x->mark.m;
1da177e4 1487
658b219e
HX		 1488 spin_lock_bh(&x->lock);
1489 if (x->km.state == XFRM_STATE_DEAD)
1490 goto unlock;
1491
1492 err = 0;
1da177e4 1493 if (x->id.spi)
658b219e
HX		 1494 goto unlock;
1495
1496 err = -ENOENT;
1da177e4
LT		 1497
1498 if (minspi == maxspi) {
bd55775c 1499 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1500 if (x0) {
1501 xfrm_state_put(x0);
658b219e 1502 goto unlock;
1da177e4
LT		 1503 }
1504 x->id.spi = minspi;
1505 } else {
1506 u32 spi = 0;
26977b4e
AV		 1507 for (h=0; h<high-low+1; h++) {
1508 spi = low + net_random()%(high-low+1);
bd55775c 1509 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1510 if (x0 == NULL) {
1511 x->id.spi = htonl(spi);
1512 break;
1513 }
1514 xfrm_state_put(x0);
1515 }
1516 }
1517 if (x->id.spi) {
1518 spin_lock_bh(&xfrm_state_lock);
12604d8a
AD		 1519 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1520 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 1521 spin_unlock_bh(&xfrm_state_lock);
658b219e
HX		 1522
1523 err = 0;
1da177e4 1524 }
658b219e
HX		 1525
1526unlock:
1527 spin_unlock_bh(&x->lock);
1528
1529 return err;
1da177e4
LT		 1530}
1531EXPORT_SYMBOL(xfrm_alloc_spi);
1532
284fa7da 1533int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1534 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1535 void *data)
1536{
12a169e7
HX		 1537 struct xfrm_state *state;
1538 struct xfrm_state_walk *x;
1da177e4
LT		 1539 int err = 0;
1540
12a169e7 1541 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1542 return 0;
1543
1da177e4 1544 spin_lock_bh(&xfrm_state_lock);
12a169e7 1545 if (list_empty(&walk->all))
284fa7da 1546 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1547 else
1548 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1549 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1550 if (x->state == XFRM_STATE_DEAD)
4c563f76 1551 continue;
12a169e7
HX		 1552 state = container_of(x, struct xfrm_state, km);
1553 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1554 continue;
12a169e7
HX		 1555 err = func(state, walk->seq, data);
1556 if (err) {
1557 list_move_tail(&walk->all, &x->all);
1558 goto out;
1da177e4 1559 }
12a169e7 1560 walk->seq++;
1da177e4 1561 }
12a169e7 1562 if (walk->seq == 0) {
1da177e4
LT		 1563 err = -ENOENT;
1564 goto out;
1565 }
12a169e7 1566 list_del_init(&walk->all);
1da177e4
LT		 1567out:
1568 spin_unlock_bh(&xfrm_state_lock);
1569 return err;
1570}
1571EXPORT_SYMBOL(xfrm_state_walk);
1572
5c182458
HX		 1573void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1574{
12a169e7 1575 INIT_LIST_HEAD(&walk->all);
5c182458 1576 walk->proto = proto;
12a169e7
HX		 1577 walk->state = XFRM_STATE_DEAD;
1578 walk->seq = 0;
5c182458
HX		 1579}
1580EXPORT_SYMBOL(xfrm_state_walk_init);
1581
abb81c4f
HX		 1582void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1583{
12a169e7 1584 if (list_empty(&walk->all))
5c182458 1585 return;
5c182458 1586
12a169e7
HX		 1587 spin_lock_bh(&xfrm_state_lock);
1588 list_del(&walk->all);
7d0b591c 1589 spin_unlock_bh(&xfrm_state_lock);
abb81c4f
HX		 1590}
1591EXPORT_SYMBOL(xfrm_state_walk_done);
1592
f8cd5488
JHS		 1593
1594void xfrm_replay_notify(struct xfrm_state *x, int event)
1595{
1596 struct km_event c;
1597 /* we send notify messages in case
1598 * 1. we updated on of the sequence numbers, and the seqno difference
1599 * is at least x->replay_maxdiff, in this case we also update the
1600 * timeout of our timer function
1601 * 2. if x->replay_maxage has elapsed since last update,
1602 * and there were changes
1603 *
1604 * The state structure must be locked!
1605 */
1606
1607 switch (event) {
1608 case XFRM_REPLAY_UPDATE:
1609 if (x->replay_maxdiff &&
1610 (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
2717096a
JHS		 1611 (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
1612 if (x->xflags & XFRM_TIME_DEFER)
1613 event = XFRM_REPLAY_TIMEOUT;
1614 else
1615 return;
1616 }
f8cd5488
JHS		 1617
1618 break;
1619
1620 case XFRM_REPLAY_TIMEOUT:
1621 if ((x->replay.seq == x->preplay.seq) &&
1622 (x->replay.bitmap == x->preplay.bitmap) &&
2717096a
JHS		 1623 (x->replay.oseq == x->preplay.oseq)) {
1624 x->xflags |= XFRM_TIME_DEFER;
f8cd5488 1625 return;
2717096a 1626 }
f8cd5488
JHS		 1627
1628 break;
1629 }
1630
1631 memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
1632 c.event = XFRM_MSG_NEWAE;
1633 c.data.aevent = event;
1634 km_state_notify(x, &c);
1635
f8cd5488 1636 if (x->replay_maxage &&
a47f0ce0 1637 !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
2717096a 1638 x->xflags &= ~XFRM_TIME_DEFER;
f8cd5488
JHS		 1639}
1640
1641static void xfrm_replay_timer_handler(unsigned long data)
1642{
1643 struct xfrm_state *x = (struct xfrm_state*)data;
1644
1645 spin_lock(&x->lock);
1646
2717096a 1647 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1648 if (xfrm_aevent_is_on(xs_net(x)))
2717096a
JHS		 1649 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
1650 else
1651 x->xflags |= XFRM_TIME_DEFER;
1652 }
f8cd5488
JHS		 1653
1654 spin_unlock(&x->lock);
1655}
1656
afeb14b4
PM		 1657int xfrm_replay_check(struct xfrm_state *x,
1658 struct sk_buff *skb, __be32 net_seq)
1da177e4
LT		 1659{
1660 u32 diff;
a252cc23 1661 u32 seq = ntohl(net_seq);
1da177e4
LT		 1662
1663 if (unlikely(seq == 0))
afeb14b4 1664 goto err;
1da177e4
LT		 1665
1666 if (likely(seq > x->replay.seq))
1667 return 0;
1668
1669 diff = x->replay.seq - seq;
4c4d51a7
HX		 1670 if (diff >= min_t(unsigned int, x->props.replay_window,
1671 sizeof(x->replay.bitmap) * 8)) {
1da177e4 1672 x->stats.replay_window++;
afeb14b4 1673 goto err;
1da177e4
LT		 1674 }
1675
1676 if (x->replay.bitmap & (1U << diff)) {
1677 x->stats.replay++;
afeb14b4 1678 goto err;
1da177e4
LT		 1679 }
1680 return 0;
afeb14b4
PM		 1681
1682err:
1683 xfrm_audit_state_replay(x, skb, net_seq);
1684 return -EINVAL;
1da177e4 1685}
1da177e4 1686
61f4627b 1687void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
1da177e4
LT		 1688{
1689 u32 diff;
61f4627b 1690 u32 seq = ntohl(net_seq);
1da177e4
LT		 1691
1692 if (seq > x->replay.seq) {
1693 diff = seq - x->replay.seq;
1694 if (diff < x->props.replay_window)
1695 x->replay.bitmap = ((x->replay.bitmap) << diff) | 1;
1696 else
1697 x->replay.bitmap = 1;
1698 x->replay.seq = seq;
1699 } else {
1700 diff = x->replay.seq - seq;
1701 x->replay.bitmap |= (1U << diff);
1702 }
f8cd5488 1703
a6483b79 1704 if (xfrm_aevent_is_on(xs_net(x)))
f8cd5488 1705 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1da177e4 1706}
1da177e4 1707
df01812e 1708static LIST_HEAD(xfrm_km_list);
1da177e4
LT		 1709static DEFINE_RWLOCK(xfrm_km_lock);
1710
26b15dad 1711void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 1712{
1713 struct xfrm_mgr *km;
1714
26b15dad
JHS		 1715 read_lock(&xfrm_km_lock);
1716 list_for_each_entry(km, &xfrm_km_list, list)
1717 if (km->notify_policy)
1718 km->notify_policy(xp, dir, c);
1719 read_unlock(&xfrm_km_lock);
1720}
1da177e4 1721
26b15dad
JHS		 1722void km_state_notify(struct xfrm_state *x, struct km_event *c)
1723{
1724 struct xfrm_mgr *km;
1da177e4
LT		 1725 read_lock(&xfrm_km_lock);
1726 list_for_each_entry(km, &xfrm_km_list, list)
26b15dad
JHS		 1727 if (km->notify)
1728 km->notify(x, c);
1da177e4 1729 read_unlock(&xfrm_km_lock);
26b15dad
JHS		 1730}
1731
1732EXPORT_SYMBOL(km_policy_notify);
1733EXPORT_SYMBOL(km_state_notify);
1734
53bc6b4d 1735void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
26b15dad 1736{
98806f75 1737 struct net *net = xs_net(x);
26b15dad
JHS		 1738 struct km_event c;
1739
bf08867f 1740 c.data.hard = hard;
53bc6b4d 1741 c.pid = pid;
f60f6b8f 1742 c.event = XFRM_MSG_EXPIRE;
26b15dad 1743 km_state_notify(x, &c);
1da177e4
LT		 1744
1745 if (hard)
98806f75 1746 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1747}
1748
53bc6b4d 1749EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1750/*
1751 * We send to all registered managers regardless of failure
1752 * We are happy with one success
1753*/
980ebd25 1754int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1755{
26b15dad 1756 int err = -EINVAL, acqret;
1da177e4
LT		 1757 struct xfrm_mgr *km;
1758
1759 read_lock(&xfrm_km_lock);
1760 list_for_each_entry(km, &xfrm_km_list, list) {
26b15dad
JHS		 1761 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1762 if (!acqret)
1763 err = acqret;
1da177e4
LT		 1764 }
1765 read_unlock(&xfrm_km_lock);
1766 return err;
1767}
980ebd25 1768EXPORT_SYMBOL(km_query);
1da177e4 1769
5d36b180 1770int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1771{
1772 int err = -EINVAL;
1773 struct xfrm_mgr *km;
1774
1775 read_lock(&xfrm_km_lock);
1776 list_for_each_entry(km, &xfrm_km_list, list) {
1777 if (km->new_mapping)
1778 err = km->new_mapping(x, ipaddr, sport);
1779 if (!err)
1780 break;
1781 }
1782 read_unlock(&xfrm_km_lock);
1783 return err;
1784}
1785EXPORT_SYMBOL(km_new_mapping);
1786
6c5c8ca7 1787void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1da177e4 1788{
98806f75 1789 struct net *net = xp_net(pol);
26b15dad 1790 struct km_event c;
1da177e4 1791
bf08867f 1792 c.data.hard = hard;
6c5c8ca7 1793 c.pid = pid;
f60f6b8f 1794 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1795 km_policy_notify(pol, dir, &c);
1da177e4
LT		 1796
1797 if (hard)
98806f75 1798 wake_up(&net->xfrm.km_waitq);
1da177e4 1799}
a70fcb0b 1800EXPORT_SYMBOL(km_policy_expired);
1da177e4 1801
2d60abc2 1802#ifdef CONFIG_XFRM_MIGRATE
80c9abaa 1803int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1804 struct xfrm_migrate *m, int num_migrate,
1805 struct xfrm_kmaddress *k)
80c9abaa
SS		 1806{
1807 int err = -EINVAL;
1808 int ret;
1809 struct xfrm_mgr *km;
1810
1811 read_lock(&xfrm_km_lock);
1812 list_for_each_entry(km, &xfrm_km_list, list) {
1813 if (km->migrate) {
13c1d189 1814 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1815 if (!ret)
1816 err = ret;
1817 }
1818 }
1819 read_unlock(&xfrm_km_lock);
1820 return err;
1821}
1822EXPORT_SYMBOL(km_migrate);
2d60abc2 1823#endif
80c9abaa 1824
db983c11 1825int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1826{
1827 int err = -EINVAL;
1828 int ret;
1829 struct xfrm_mgr *km;
1830
1831 read_lock(&xfrm_km_lock);
1832 list_for_each_entry(km, &xfrm_km_list, list) {
1833 if (km->report) {
db983c11 1834 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1835 if (!ret)
1836 err = ret;
1837 }
1838 }
1839 read_unlock(&xfrm_km_lock);
1840 return err;
1841}
1842EXPORT_SYMBOL(km_report);
1843
1da177e4
LT		 1844int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1845{
1846 int err;
1847 u8 *data;
1848 struct xfrm_mgr *km;
1849 struct xfrm_policy *pol = NULL;
1850
1851 if (optlen <= 0 || optlen > PAGE_SIZE)
1852 return -EMSGSIZE;
1853
1854 data = kmalloc(optlen, GFP_KERNEL);
1855 if (!data)
1856 return -ENOMEM;
1857
1858 err = -EFAULT;
1859 if (copy_from_user(data, optval, optlen))
1860 goto out;
1861
1862 err = -EINVAL;
1863 read_lock(&xfrm_km_lock);
1864 list_for_each_entry(km, &xfrm_km_list, list) {
cb969f07 1865 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1866 optlen, &err);
1867 if (err >= 0)
1868 break;
1869 }
1870 read_unlock(&xfrm_km_lock);
1871
1872 if (err >= 0) {
1873 xfrm_sk_policy_insert(sk, err, pol);
1874 xfrm_pol_put(pol);
1875 err = 0;
1876 }
1877
1878out:
1879 kfree(data);
1880 return err;
1881}
1882EXPORT_SYMBOL(xfrm_user_policy);
1883
1884int xfrm_register_km(struct xfrm_mgr *km)
1885{
1886 write_lock_bh(&xfrm_km_lock);
1887 list_add_tail(&km->list, &xfrm_km_list);
1888 write_unlock_bh(&xfrm_km_lock);
1889 return 0;
1890}
1891EXPORT_SYMBOL(xfrm_register_km);
1892
1893int xfrm_unregister_km(struct xfrm_mgr *km)
1894{
1895 write_lock_bh(&xfrm_km_lock);
1896 list_del(&km->list);
1897 write_unlock_bh(&xfrm_km_lock);
1898 return 0;
1899}
1900EXPORT_SYMBOL(xfrm_unregister_km);
1901
1902int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1903{
1904 int err = 0;
1905 if (unlikely(afinfo == NULL))
1906 return -EINVAL;
1907 if (unlikely(afinfo->family >= NPROTO))
1908 return -EAFNOSUPPORT;
f3111502 1909 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1910 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1911 err = -ENOBUFS;
edcd5821 1912 else
1da177e4 1913 xfrm_state_afinfo[afinfo->family] = afinfo;
f3111502 1914 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1915 return err;
1916}
1917EXPORT_SYMBOL(xfrm_state_register_afinfo);
1918
1919int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1920{
1921 int err = 0;
1922 if (unlikely(afinfo == NULL))
1923 return -EINVAL;
1924 if (unlikely(afinfo->family >= NPROTO))
1925 return -EAFNOSUPPORT;
f3111502 1926 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1927 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1928 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1929 err = -EINVAL;
edcd5821 1930 else
1da177e4 1931 xfrm_state_afinfo[afinfo->family] = NULL;
1da177e4 1932 }
f3111502 1933 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1934 return err;
1935}
1936EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1937
17c2a42a 1938static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1939{
1940 struct xfrm_state_afinfo *afinfo;
1941 if (unlikely(family >= NPROTO))
1942 return NULL;
1943 read_lock(&xfrm_state_afinfo_lock);
1944 afinfo = xfrm_state_afinfo[family];
546be240
HX		 1945 if (unlikely(!afinfo))
1946 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1947 return afinfo;
1948}
1949
17c2a42a 1950static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 1951 __releases(xfrm_state_afinfo_lock)
1da177e4 1952{
546be240 1953 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1954}
1955
1956/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1957void xfrm_state_delete_tunnel(struct xfrm_state *x)
1958{
1959 if (x->tunnel) {
1960 struct xfrm_state *t = x->tunnel;
1961
1962 if (atomic_read(&t->tunnel_users) == 2)
1963 xfrm_state_delete(t);
1964 atomic_dec(&t->tunnel_users);
1965 xfrm_state_put(t);
1966 x->tunnel = NULL;
1967 }
1968}
1969EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1970
1971int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1972{
c5c25238 1973 int res;
1da177e4 1974
c5c25238
PM		 1975 spin_lock_bh(&x->lock);
1976 if (x->km.state == XFRM_STATE_VALID &&
1977 x->type && x->type->get_mtu)
1978 res = x->type->get_mtu(x, mtu);
1979 else
28121617 1980 res = mtu - x->props.header_len;
c5c25238 1981 spin_unlock_bh(&x->lock);
1da177e4
LT		 1982 return res;
1983}
1984
72cb6962
HX		 1985int xfrm_init_state(struct xfrm_state *x)
1986{
d094cd83 1987 struct xfrm_state_afinfo *afinfo;
df9dcb45 1988 struct xfrm_mode *inner_mode;
d094cd83 1989 int family = x->props.family;
72cb6962
HX		 1990 int err;
1991
d094cd83
HX		 1992 err = -EAFNOSUPPORT;
1993 afinfo = xfrm_state_get_afinfo(family);
1994 if (!afinfo)
1995 goto error;
1996
1997 err = 0;
1998 if (afinfo->init_flags)
1999 err = afinfo->init_flags(x);
2000
2001 xfrm_state_put_afinfo(afinfo);
2002
2003 if (err)
2004 goto error;
2005
2006 err = -EPROTONOSUPPORT;
13996378 2007
df9dcb45
KM		 2008 if (x->sel.family != AF_UNSPEC) {
2009 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2010 if (inner_mode == NULL)
2011 goto error;
2012
2013 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2014 family != x->sel.family) {
2015 xfrm_put_mode(inner_mode);
2016 goto error;
2017 }
2018
2019 x->inner_mode = inner_mode;
2020 } else {
2021 struct xfrm_mode *inner_mode_iaf;
d81d2285 2022 int iafamily = AF_INET;
df9dcb45 2023
d81d2285 2024 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2025 if (inner_mode == NULL)
2026 goto error;
2027
2028 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2029 xfrm_put_mode(inner_mode);
2030 goto error;
2031 }
d81d2285 2032 x->inner_mode = inner_mode;
df9dcb45 2033
d81d2285
MW		 2034 if (x->props.family == AF_INET)
2035 iafamily = AF_INET6;
df9dcb45 2036
d81d2285
MW		 2037 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2038 if (inner_mode_iaf) {
2039 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2040 x->inner_mode_iaf = inner_mode_iaf;
2041 else
2042 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 2043 }
2044 }
13996378 2045
d094cd83 2046 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2047 if (x->type == NULL)
2048 goto error;
2049
2050 err = x->type->init_state(x);
2051 if (err)
2052 goto error;
2053
13996378
HX		 2054 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2055 if (x->outer_mode == NULL)
b59f45d0
HX		 2056 goto error;
2057
72cb6962
HX		 2058 x->km.state = XFRM_STATE_VALID;
2059
2060error:
2061 return err;
2062}
2063
2064EXPORT_SYMBOL(xfrm_init_state);
a716c119 2065
d62ddc21 2066int __net_init xfrm_state_init(struct net *net)
1da177e4 2067{
f034b5d4
DM		 2068 unsigned int sz;
2069
9d4139c7
AD		 2070 INIT_LIST_HEAD(&net->xfrm.state_all);
2071
f034b5d4
DM		 2072 sz = sizeof(struct hlist_head) * 8;
2073
73d189dc
AD		 2074 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2075 if (!net->xfrm.state_bydst)
2076 goto out_bydst;
d320bbb3
AD		 2077 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2078 if (!net->xfrm.state_bysrc)
2079 goto out_bysrc;
b754a4fd
AD		 2080 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2081 if (!net->xfrm.state_byspi)
2082 goto out_byspi;
529983ec 2083 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2084
0bf7c5b0 2085 net->xfrm.state_num = 0;
63082733 2086 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2087 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2088 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
50a30657 2089 init_waitqueue_head(&net->xfrm.km_waitq);
d62ddc21 2090 return 0;
73d189dc 2091
b754a4fd
AD		 2092out_byspi:
2093 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2094out_bysrc:
2095 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2096out_bydst:
2097 return -ENOMEM;
d62ddc21
AD		 2098}
2099
2100void xfrm_state_fini(struct net *net)
2101{
7c2776ee 2102 struct xfrm_audit audit_info;
73d189dc
AD		 2103 unsigned int sz;
2104
7c2776ee
AD		 2105 flush_work(&net->xfrm.state_hash_work);
2106 audit_info.loginuid = -1;
2107 audit_info.sessionid = -1;
2108 audit_info.secid = 0;
2109 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2110 flush_work(&net->xfrm.state_gc_work);
2111
9d4139c7 2112 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2113
529983ec 2114 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2115 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2116 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2117 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2118 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2119 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2120 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2121}
2122
ab5f5e8b 2123#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2124static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2125 struct audit_buffer *audit_buf)
ab5f5e8b 2126{
68277acc
PM		 2127 struct xfrm_sec_ctx *ctx = x->security;
2128 u32 spi = ntohl(x->id.spi);
2129
2130 if (ctx)
ab5f5e8b 2131 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2132 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2133
2134 switch(x->props.family) {
2135 case AF_INET:
21454aaa
HH		 2136 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2137 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2138 break;
2139 case AF_INET6:
5b095d98 2140 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2141 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2142 break;
2143 }
68277acc
PM		 2144
2145 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2146}
2147
cf35f43e
IJ		 2148static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2149 struct audit_buffer *audit_buf)
afeb14b4
PM		 2150{
2151 struct iphdr *iph4;
2152 struct ipv6hdr *iph6;
2153
2154 switch (family) {
2155 case AF_INET:
2156 iph4 = ip_hdr(skb);
21454aaa
HH		 2157 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2158 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2159 break;
2160 case AF_INET6:
2161 iph6 = ipv6_hdr(skb);
2162 audit_log_format(audit_buf,
5b095d98 2163 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2164 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2165 iph6->flow_lbl[0] & 0x0f,
2166 iph6->flow_lbl[1],
2167 iph6->flow_lbl[2]);
2168 break;
2169 }
2170}
2171
68277acc 2172void xfrm_audit_state_add(struct xfrm_state *x, int result,
2532386f 2173 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2174{
2175 struct audit_buffer *audit_buf;
ab5f5e8b 2176
afeb14b4 2177 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2178 if (audit_buf == NULL)
2179 return;
2532386f 2180 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2181 xfrm_audit_helper_sainfo(x, audit_buf);
2182 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2183 audit_log_end(audit_buf);
2184}
2185EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2186
68277acc 2187void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2532386f 2188 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2189{
2190 struct audit_buffer *audit_buf;
ab5f5e8b 2191
afeb14b4 2192 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2193 if (audit_buf == NULL)
2194 return;
2532386f 2195 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2196 xfrm_audit_helper_sainfo(x, audit_buf);
2197 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2198 audit_log_end(audit_buf);
2199}
2200EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2201
2202void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2203 struct sk_buff *skb)
2204{
2205 struct audit_buffer *audit_buf;
2206 u32 spi;
2207
2208 audit_buf = xfrm_audit_start("SA-replay-overflow");
2209 if (audit_buf == NULL)
2210 return;
2211 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2212 /* don't record the sequence number because it's inherent in this kind
2213 * of audit message */
2214 spi = ntohl(x->id.spi);
2215 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2216 audit_log_end(audit_buf);
2217}
2218EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2219
2220static void xfrm_audit_state_replay(struct xfrm_state *x,
2221 struct sk_buff *skb, __be32 net_seq)
2222{
2223 struct audit_buffer *audit_buf;
2224 u32 spi;
2225
2226 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2227 if (audit_buf == NULL)
2228 return;
2229 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2230 spi = ntohl(x->id.spi);
2231 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2232 spi, spi, ntohl(net_seq));
2233 audit_log_end(audit_buf);
2234}
2235
2236void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2237{
2238 struct audit_buffer *audit_buf;
2239
2240 audit_buf = xfrm_audit_start("SA-notfound");
2241 if (audit_buf == NULL)
2242 return;
2243 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2244 audit_log_end(audit_buf);
2245}
2246EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2247
2248void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2249 __be32 net_spi, __be32 net_seq)
2250{
2251 struct audit_buffer *audit_buf;
2252 u32 spi;
2253
2254 audit_buf = xfrm_audit_start("SA-notfound");
2255 if (audit_buf == NULL)
2256 return;
2257 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2258 spi = ntohl(net_spi);
2259 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2260 spi, spi, ntohl(net_seq));
2261 audit_log_end(audit_buf);
2262}
2263EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2264
2265void xfrm_audit_state_icvfail(struct xfrm_state *x,
2266 struct sk_buff *skb, u8 proto)
2267{
2268 struct audit_buffer *audit_buf;
2269 __be32 net_spi;
2270 __be32 net_seq;
2271
2272 audit_buf = xfrm_audit_start("SA-icv-failure");
2273 if (audit_buf == NULL)
2274 return;
2275 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2276 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2277 u32 spi = ntohl(net_spi);
2278 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2279 spi, spi, ntohl(net_seq));
2280 }
2281 audit_log_end(audit_buf);
2282}
2283EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2284#endif /* CONFIG_AUDITSYSCALL */
Linux 6.x block layer and io_uring tree(s)