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xfrm: Remove xfrm_state_genid
[GitHub/mt8127/android_kernel_alcatel_ttab.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;
f034b5d4 40
17c2a42a
HX		 41static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
42static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
43
afeb14b4
PM		 44#ifdef CONFIG_AUDITSYSCALL
45static void xfrm_audit_state_replay(struct xfrm_state *x,
46 struct sk_buff *skb, __be32 net_seq);
47#else
48#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
49#endif /* CONFIG_AUDITSYSCALL */
50
64d0cd00
AD		 51static inline unsigned int xfrm_dst_hash(struct net *net,
52 xfrm_address_t *daddr,
c1969f29
DM		 53 xfrm_address_t *saddr,
54 u32 reqid,
a624c108 55 unsigned short family)
f034b5d4 56{
64d0cd00 57 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 58}
59
64d0cd00
AD		 60static inline unsigned int xfrm_src_hash(struct net *net,
61 xfrm_address_t *daddr,
667bbcb6 62 xfrm_address_t *saddr,
44e36b42 63 unsigned short family)
f034b5d4 64{
64d0cd00 65 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 66}
67
f034b5d4 68static inline unsigned int
64d0cd00 69xfrm_spi_hash(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
f034b5d4 70{
64d0cd00 71 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 72}
73
f034b5d4
DM		 74static void xfrm_hash_transfer(struct hlist_head *list,
75 struct hlist_head *ndsttable,
76 struct hlist_head *nsrctable,
77 struct hlist_head *nspitable,
78 unsigned int nhashmask)
79{
80 struct hlist_node *entry, *tmp;
81 struct xfrm_state *x;
82
83 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
84 unsigned int h;
85
c1969f29
DM		 86 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
87 x->props.reqid, x->props.family,
88 nhashmask);
f034b5d4
DM		 89 hlist_add_head(&x->bydst, ndsttable+h);
90
667bbcb6
MN		 91 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
92 x->props.family,
f034b5d4
DM		 93 nhashmask);
94 hlist_add_head(&x->bysrc, nsrctable+h);
95
7b4dc360
MN		 96 if (x->id.spi) {
97 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
98 x->id.proto, x->props.family,
99 nhashmask);
100 hlist_add_head(&x->byspi, nspitable+h);
101 }
f034b5d4
DM		 102 }
103}
104
63082733 105static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 106{
63082733 107 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 108}
109
110static DEFINE_MUTEX(hash_resize_mutex);
111
63082733 112static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 113{
63082733 114 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 115 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
116 unsigned long nsize, osize;
117 unsigned int nhashmask, ohashmask;
118 int i;
119
120 mutex_lock(&hash_resize_mutex);
121
63082733 122 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 123 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 124 if (!ndst)
125 goto out_unlock;
44e36b42 126 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 127 if (!nsrc) {
44e36b42 128 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 129 goto out_unlock;
130 }
44e36b42 131 nspi = xfrm_hash_alloc(nsize);
f034b5d4 132 if (!nspi) {
44e36b42
DM		 133 xfrm_hash_free(ndst, nsize);
134 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 135 goto out_unlock;
136 }
137
138 spin_lock_bh(&xfrm_state_lock);
139
140 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 141 for (i = net->xfrm.state_hmask; i >= 0; i--)
142 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 143 nhashmask);
144
63082733
AD		 145 odst = net->xfrm.state_bydst;
146 osrc = net->xfrm.state_bysrc;
147 ospi = net->xfrm.state_byspi;
148 ohashmask = net->xfrm.state_hmask;
f034b5d4 149
63082733
AD		 150 net->xfrm.state_bydst = ndst;
151 net->xfrm.state_bysrc = nsrc;
152 net->xfrm.state_byspi = nspi;
153 net->xfrm.state_hmask = nhashmask;
f034b5d4
DM		 154
155 spin_unlock_bh(&xfrm_state_lock);
156
157 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 158 xfrm_hash_free(odst, osize);
159 xfrm_hash_free(osrc, osize);
160 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 161
162out_unlock:
163 mutex_unlock(&hash_resize_mutex);
164}
165
1da177e4
LT		 166static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
167static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
168
1da177e4
LT		 169static DEFINE_SPINLOCK(xfrm_state_gc_lock);
170
53bc6b4d 171int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 172
980ebd25 173int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
53bc6b4d 174void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
1da177e4 175
aa5d62cc
HX		 176static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
177{
178 struct xfrm_state_afinfo *afinfo;
179 if (unlikely(family >= NPROTO))
180 return NULL;
181 write_lock_bh(&xfrm_state_afinfo_lock);
182 afinfo = xfrm_state_afinfo[family];
183 if (unlikely(!afinfo))
184 write_unlock_bh(&xfrm_state_afinfo_lock);
185 return afinfo;
186}
187
188static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 189 __releases(xfrm_state_afinfo_lock)
aa5d62cc
HX		 190{
191 write_unlock_bh(&xfrm_state_afinfo_lock);
192}
193
533cb5b0 194int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 195{
196 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 197 const struct xfrm_type **typemap;
aa5d62cc
HX		 198 int err = 0;
199
200 if (unlikely(afinfo == NULL))
201 return -EAFNOSUPPORT;
202 typemap = afinfo->type_map;
203
204 if (likely(typemap[type->proto] == NULL))
205 typemap[type->proto] = type;
206 else
207 err = -EEXIST;
208 xfrm_state_unlock_afinfo(afinfo);
209 return err;
210}
211EXPORT_SYMBOL(xfrm_register_type);
212
533cb5b0 213int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc
HX		 214{
215 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
533cb5b0 216 const struct xfrm_type **typemap;
aa5d62cc
HX		 217 int err = 0;
218
219 if (unlikely(afinfo == NULL))
220 return -EAFNOSUPPORT;
221 typemap = afinfo->type_map;
222
223 if (unlikely(typemap[type->proto] != type))
224 err = -ENOENT;
225 else
226 typemap[type->proto] = NULL;
227 xfrm_state_unlock_afinfo(afinfo);
228 return err;
229}
230EXPORT_SYMBOL(xfrm_unregister_type);
231
533cb5b0 232static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 233{
234 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 235 const struct xfrm_type **typemap;
236 const struct xfrm_type *type;
aa5d62cc
HX		 237 int modload_attempted = 0;
238
239retry:
240 afinfo = xfrm_state_get_afinfo(family);
241 if (unlikely(afinfo == NULL))
242 return NULL;
243 typemap = afinfo->type_map;
244
245 type = typemap[proto];
246 if (unlikely(type && !try_module_get(type->owner)))
247 type = NULL;
248 if (!type && !modload_attempted) {
249 xfrm_state_put_afinfo(afinfo);
250 request_module("xfrm-type-%d-%d", family, proto);
251 modload_attempted = 1;
252 goto retry;
253 }
254
255 xfrm_state_put_afinfo(afinfo);
256 return type;
257}
258
533cb5b0 259static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 260{
261 module_put(type->owner);
262}
263
264int xfrm_register_mode(struct xfrm_mode *mode, int family)
265{
266 struct xfrm_state_afinfo *afinfo;
267 struct xfrm_mode **modemap;
268 int err;
269
270 if (unlikely(mode->encap >= XFRM_MODE_MAX))
271 return -EINVAL;
272
273 afinfo = xfrm_state_lock_afinfo(family);
274 if (unlikely(afinfo == NULL))
275 return -EAFNOSUPPORT;
276
277 err = -EEXIST;
278 modemap = afinfo->mode_map;
17c2a42a
HX		 279 if (modemap[mode->encap])
280 goto out;
aa5d62cc 281
17c2a42a
HX		 282 err = -ENOENT;
283 if (!try_module_get(afinfo->owner))
284 goto out;
285
286 mode->afinfo = afinfo;
287 modemap[mode->encap] = mode;
288 err = 0;
289
290out:
aa5d62cc
HX		 291 xfrm_state_unlock_afinfo(afinfo);
292 return err;
293}
294EXPORT_SYMBOL(xfrm_register_mode);
295
296int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
297{
298 struct xfrm_state_afinfo *afinfo;
299 struct xfrm_mode **modemap;
300 int err;
301
302 if (unlikely(mode->encap >= XFRM_MODE_MAX))
303 return -EINVAL;
304
305 afinfo = xfrm_state_lock_afinfo(family);
306 if (unlikely(afinfo == NULL))
307 return -EAFNOSUPPORT;
308
309 err = -ENOENT;
310 modemap = afinfo->mode_map;
311 if (likely(modemap[mode->encap] == mode)) {
312 modemap[mode->encap] = NULL;
17c2a42a 313 module_put(mode->afinfo->owner);
aa5d62cc
HX		 314 err = 0;
315 }
316
317 xfrm_state_unlock_afinfo(afinfo);
318 return err;
319}
320EXPORT_SYMBOL(xfrm_unregister_mode);
321
322static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
323{
324 struct xfrm_state_afinfo *afinfo;
325 struct xfrm_mode *mode;
326 int modload_attempted = 0;
327
328 if (unlikely(encap >= XFRM_MODE_MAX))
329 return NULL;
330
331retry:
332 afinfo = xfrm_state_get_afinfo(family);
333 if (unlikely(afinfo == NULL))
334 return NULL;
335
336 mode = afinfo->mode_map[encap];
337 if (unlikely(mode && !try_module_get(mode->owner)))
338 mode = NULL;
339 if (!mode && !modload_attempted) {
340 xfrm_state_put_afinfo(afinfo);
341 request_module("xfrm-mode-%d-%d", family, encap);
342 modload_attempted = 1;
343 goto retry;
344 }
345
346 xfrm_state_put_afinfo(afinfo);
347 return mode;
348}
349
350static void xfrm_put_mode(struct xfrm_mode *mode)
351{
352 module_put(mode->owner);
353}
354
1da177e4
LT		 355static void xfrm_state_gc_destroy(struct xfrm_state *x)
356{
9e0d57fd 357 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 358 del_timer_sync(&x->rtimer);
a51482bd
JJ		 359 kfree(x->aalg);
360 kfree(x->ealg);
361 kfree(x->calg);
362 kfree(x->encap);
060f02a3 363 kfree(x->coaddr);
13996378
HX		 364 if (x->inner_mode)
365 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 366 if (x->inner_mode_iaf)
367 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 368 if (x->outer_mode)
369 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 370 if (x->type) {
371 x->type->destructor(x);
372 xfrm_put_type(x->type);
373 }
df71837d 374 security_xfrm_state_free(x);
1da177e4
LT		 375 kfree(x);
376}
377
c7837144 378static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 379{
c7837144 380 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7
HX		 381 struct xfrm_state *x;
382 struct hlist_node *entry, *tmp;
383 struct hlist_head gc_list;
1da177e4 384
1da177e4 385 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 386 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 387 spin_unlock_bh(&xfrm_state_gc_lock);
388
12a169e7 389 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
1da177e4 390 xfrm_state_gc_destroy(x);
8f126e37 391
50a30657 392 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 393}
394
395static inline unsigned long make_jiffies(long secs)
396{
397 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
398 return MAX_SCHEDULE_TIMEOUT-1;
399 else
a716c119 400 return secs*HZ;
1da177e4
LT		 401}
402
9e0d57fd 403static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
1da177e4 404{
9e0d57fd
YP		 405 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
406 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
98806f75 407 struct net *net = xs_net(x);
9d729f72 408 unsigned long now = get_seconds();
1da177e4
LT		 409 long next = LONG_MAX;
410 int warn = 0;
161a09e7 411 int err = 0;
1da177e4
LT		 412
413 spin_lock(&x->lock);
414 if (x->km.state == XFRM_STATE_DEAD)
415 goto out;
416 if (x->km.state == XFRM_STATE_EXPIRED)
417 goto expired;
418 if (x->lft.hard_add_expires_seconds) {
419 long tmo = x->lft.hard_add_expires_seconds +
420 x->curlft.add_time - now;
421 if (tmo <= 0)
422 goto expired;
423 if (tmo < next)
424 next = tmo;
425 }
426 if (x->lft.hard_use_expires_seconds) {
427 long tmo = x->lft.hard_use_expires_seconds +
428 (x->curlft.use_time ? : now) - now;
429 if (tmo <= 0)
430 goto expired;
431 if (tmo < next)
432 next = tmo;
433 }
434 if (x->km.dying)
435 goto resched;
436 if (x->lft.soft_add_expires_seconds) {
437 long tmo = x->lft.soft_add_expires_seconds +
438 x->curlft.add_time - now;
439 if (tmo <= 0)
440 warn = 1;
441 else if (tmo < next)
442 next = tmo;
443 }
444 if (x->lft.soft_use_expires_seconds) {
445 long tmo = x->lft.soft_use_expires_seconds +
446 (x->curlft.use_time ? : now) - now;
447 if (tmo <= 0)
448 warn = 1;
449 else if (tmo < next)
450 next = tmo;
451 }
452
4666faab 453 x->km.dying = warn;
1da177e4 454 if (warn)
53bc6b4d 455 km_state_expired(x, 0, 0);
1da177e4 456resched:
9e0d57fd
YP		 457 if (next != LONG_MAX){
458 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
459 }
a47f0ce0 460
1da177e4
LT		 461 goto out;
462
463expired:
464 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
465 x->km.state = XFRM_STATE_EXPIRED;
98806f75 466 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 467 next = 2;
468 goto resched;
469 }
161a09e7
JL		 470
471 err = __xfrm_state_delete(x);
472 if (!err && x->id.spi)
53bc6b4d 473 km_state_expired(x, 1, 0);
1da177e4 474
ab5f5e8b 475 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 476 audit_get_loginuid(current),
477 audit_get_sessionid(current), 0);
161a09e7 478
1da177e4
LT		 479out:
480 spin_unlock(&x->lock);
9e0d57fd 481 return HRTIMER_NORESTART;
1da177e4
LT		 482}
483
0ac84752
DM		 484static void xfrm_replay_timer_handler(unsigned long data);
485
673c09be 486struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 487{
488 struct xfrm_state *x;
489
0da974f4 490 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 491
492 if (x) {
673c09be 493 write_pnet(&x->xs_net, net);
1da177e4
LT		 494 atomic_set(&x->refcnt, 1);
495 atomic_set(&x->tunnel_users, 0);
12a169e7 496 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 497 INIT_HLIST_NODE(&x->bydst);
498 INIT_HLIST_NODE(&x->bysrc);
499 INIT_HLIST_NODE(&x->byspi);
9e0d57fd 500 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 501 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
502 (unsigned long)x);
9d729f72 503 x->curlft.add_time = get_seconds();
1da177e4
LT		 504 x->lft.soft_byte_limit = XFRM_INF;
505 x->lft.soft_packet_limit = XFRM_INF;
506 x->lft.hard_byte_limit = XFRM_INF;
507 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 508 x->replay_maxage = 0;
509 x->replay_maxdiff = 0;
df9dcb45
KM		 510 x->inner_mode = NULL;
511 x->inner_mode_iaf = NULL;
1da177e4
LT		 512 spin_lock_init(&x->lock);
513 }
514 return x;
515}
516EXPORT_SYMBOL(xfrm_state_alloc);
517
518void __xfrm_state_destroy(struct xfrm_state *x)
519{
98806f75
AD		 520 struct net *net = xs_net(x);
521
547b792c 522 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 523
524 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 525 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 526 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 527 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 528}
529EXPORT_SYMBOL(__xfrm_state_destroy);
530
53bc6b4d 531int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 532{
98806f75 533 struct net *net = xs_net(x);
26b15dad
JHS		 534 int err = -ESRCH;
535
1da177e4
LT		 536 if (x->km.state != XFRM_STATE_DEAD) {
537 x->km.state = XFRM_STATE_DEAD;
538 spin_lock(&xfrm_state_lock);
12a169e7 539 list_del(&x->km.all);
8f126e37 540 hlist_del(&x->bydst);
8f126e37 541 hlist_del(&x->bysrc);
a47f0ce0 542 if (x->id.spi)
8f126e37 543 hlist_del(&x->byspi);
98806f75 544 net->xfrm.state_num--;
1da177e4 545 spin_unlock(&xfrm_state_lock);
1da177e4 546
1da177e4
LT		 547 /* All xfrm_state objects are created by xfrm_state_alloc.
548 * The xfrm_state_alloc call gives a reference, and that
549 * is what we are dropping here.
550 */
5dba4797 551 xfrm_state_put(x);
26b15dad 552 err = 0;
1da177e4 553 }
26b15dad
JHS		 554
555 return err;
1da177e4 556}
53bc6b4d 557EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 558
26b15dad 559int xfrm_state_delete(struct xfrm_state *x)
1da177e4 560{
26b15dad
JHS		 561 int err;
562
1da177e4 563 spin_lock_bh(&x->lock);
26b15dad 564 err = __xfrm_state_delete(x);
1da177e4 565 spin_unlock_bh(&x->lock);
26b15dad
JHS		 566
567 return err;
1da177e4
LT		 568}
569EXPORT_SYMBOL(xfrm_state_delete);
570
4aa2e62c
JL		 571#ifdef CONFIG_SECURITY_NETWORK_XFRM
572static inline int
0e602451 573xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 574{
4aa2e62c
JL		 575 int i, err = 0;
576
0e602451 577 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 578 struct hlist_node *entry;
579 struct xfrm_state *x;
580
0e602451 581 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 582 if (xfrm_id_proto_match(x->id.proto, proto) &&
583 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 584 xfrm_audit_state_delete(x, 0,
585 audit_info->loginuid,
2532386f 586 audit_info->sessionid,
ab5f5e8b 587 audit_info->secid);
4aa2e62c
JL		 588 return err;
589 }
590 }
591 }
592
593 return err;
594}
595#else
596static inline int
0e602451 597xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 598{
599 return 0;
600}
601#endif
602
0e602451 603int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c 604{
9e64cc95 605 int i, err = 0, cnt = 0;
1da177e4
LT		 606
607 spin_lock_bh(&xfrm_state_lock);
0e602451 608 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 609 if (err)
610 goto out;
611
9e64cc95 612 err = -ESRCH;
0e602451 613 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 614 struct hlist_node *entry;
615 struct xfrm_state *x;
1da177e4 616restart:
0e602451 617 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
1da177e4 618 if (!xfrm_state_kern(x) &&
5794708f 619 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4
LT		 620 xfrm_state_hold(x);
621 spin_unlock_bh(&xfrm_state_lock);
622
161a09e7 623 err = xfrm_state_delete(x);
ab5f5e8b
JL		 624 xfrm_audit_state_delete(x, err ? 0 : 1,
625 audit_info->loginuid,
2532386f 626 audit_info->sessionid,
ab5f5e8b 627 audit_info->secid);
1da177e4 628 xfrm_state_put(x);
9e64cc95
JHS		 629 if (!err)
630 cnt++;
1da177e4
LT		 631
632 spin_lock_bh(&xfrm_state_lock);
633 goto restart;
634 }
635 }
636 }
9e64cc95
JHS		 637 if (cnt)
638 err = 0;
4aa2e62c
JL		 639
640out:
1da177e4 641 spin_unlock_bh(&xfrm_state_lock);
0e602451 642 wake_up(&net->xfrm.km_waitq);
4aa2e62c 643 return err;
1da177e4
LT		 644}
645EXPORT_SYMBOL(xfrm_state_flush);
646
e071041b 647void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b
JHS		 648{
649 spin_lock_bh(&xfrm_state_lock);
e071041b
AD		 650 si->sadcnt = net->xfrm.state_num;
651 si->sadhcnt = net->xfrm.state_hmask;
28d8909b
JHS		 652 si->sadhmcnt = xfrm_state_hashmax;
653 spin_unlock_bh(&xfrm_state_lock);
654}
655EXPORT_SYMBOL(xfrm_sad_getinfo);
656
1da177e4
LT		 657static int
658xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
659 struct xfrm_tmpl *tmpl,
660 xfrm_address_t *daddr, xfrm_address_t *saddr,
661 unsigned short family)
662{
663 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
664 if (!afinfo)
665 return -1;
666 afinfo->init_tempsel(x, fl, tmpl, daddr, saddr);
667 xfrm_state_put_afinfo(afinfo);
668 return 0;
669}
670
bd55775c 671static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
edcd5821 672{
221df1ed 673 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821 674 struct xfrm_state *x;
8f126e37 675 struct hlist_node *entry;
edcd5821 676
221df1ed 677 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 678 if (x->props.family != family ||
679 x->id.spi != spi ||
1802571b
WY		 680 x->id.proto != proto ||
681 xfrm_addr_cmp(&x->id.daddr, daddr, family))
edcd5821
DM		 682 continue;
683
3d6acfa7
JHS		 684 if ((mark & x->mark.m) != x->mark.v)
685 continue;
edcd5821
DM		 686 xfrm_state_hold(x);
687 return x;
688 }
689
690 return NULL;
691}
692
bd55775c 693static 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 694{
221df1ed 695 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821 696 struct xfrm_state *x;
8f126e37 697 struct hlist_node *entry;
edcd5821 698
221df1ed 699 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 700 if (x->props.family != family ||
1802571b
WY		 701 x->id.proto != proto ||
702 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
703 xfrm_addr_cmp(&x->props.saddr, saddr, family))
edcd5821
DM		 704 continue;
705
3d6acfa7
JHS		 706 if ((mark & x->mark.m) != x->mark.v)
707 continue;
edcd5821
DM		 708 xfrm_state_hold(x);
709 return x;
710 }
711
712 return NULL;
713}
714
715static inline struct xfrm_state *
716__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
717{
221df1ed 718 struct net *net = xs_net(x);
bd55775c 719 u32 mark = x->mark.v & x->mark.m;
221df1ed 720
edcd5821 721 if (use_spi)
bd55775c
JHS		 722 return __xfrm_state_lookup(net, mark, &x->id.daddr,
723 x->id.spi, x->id.proto, family);
edcd5821 724 else
bd55775c
JHS		 725 return __xfrm_state_lookup_byaddr(net, mark,
726 &x->id.daddr,
edcd5821
DM		 727 &x->props.saddr,
728 x->id.proto, family);
729}
730
98806f75 731static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 732{
733 if (have_hash_collision &&
98806f75
AD		 734 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
735 net->xfrm.state_num > net->xfrm.state_hmask)
736 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 737}
738
08ec9af1
DM		 739static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
740 struct flowi *fl, unsigned short family,
741 xfrm_address_t *daddr, xfrm_address_t *saddr,
742 struct xfrm_state **best, int *acq_in_progress,
743 int *error)
744{
745 /* Resolution logic:
746 * 1. There is a valid state with matching selector. Done.
747 * 2. Valid state with inappropriate selector. Skip.
748 *
749 * Entering area of "sysdeps".
750 *
751 * 3. If state is not valid, selector is temporary, it selects
752 * only session which triggered previous resolution. Key
753 * manager will do something to install a state with proper
754 * selector.
755 */
756 if (x->km.state == XFRM_STATE_VALID) {
757 if ((x->sel.family &&
758 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
759 !security_xfrm_state_pol_flow_match(x, pol, fl))
760 return;
761
762 if (!*best ||
763 (*best)->km.dying > x->km.dying ||
764 ((*best)->km.dying == x->km.dying &&
765 (*best)->curlft.add_time < x->curlft.add_time))
766 *best = x;
767 } else if (x->km.state == XFRM_STATE_ACQ) {
768 *acq_in_progress = 1;
769 } else if (x->km.state == XFRM_STATE_ERROR ||
770 x->km.state == XFRM_STATE_EXPIRED) {
771 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
772 security_xfrm_state_pol_flow_match(x, pol, fl))
773 *error = -ESRCH;
774 }
775}
776
1da177e4 777struct xfrm_state *
a716c119 778xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 779 struct flowi *fl, struct xfrm_tmpl *tmpl,
780 struct xfrm_policy *pol, int *err,
781 unsigned short family)
782{
08ec9af1 783 static xfrm_address_t saddr_wildcard = { };
5447c5e4 784 struct net *net = xp_net(pol);
6a783c90 785 unsigned int h, h_wildcard;
8f126e37 786 struct hlist_node *entry;
37b08e34 787 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 788 int acquire_in_progress = 0;
789 int error = 0;
790 struct xfrm_state *best = NULL;
bd55775c 791 u32 mark = pol->mark.v & pol->mark.m;
a716c119 792
37b08e34
DM		 793 to_put = NULL;
794
1da177e4 795 spin_lock_bh(&xfrm_state_lock);
5447c5e4
AD		 796 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, family);
797 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
1da177e4
LT		 798 if (x->props.family == family &&
799 x->props.reqid == tmpl->reqid &&
3d6acfa7 800 (mark & x->mark.m) == x->mark.v &&
fbd9a5b4 801 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1da177e4
LT		 802 xfrm_state_addr_check(x, daddr, saddr, family) &&
803 tmpl->mode == x->props.mode &&
804 tmpl->id.proto == x->id.proto &&
08ec9af1
DM		 805 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
806 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
807 &best, &acquire_in_progress, &error);
808 }
809 if (best)
810 goto found;
811
6a783c90
ND		 812 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, family);
813 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
08ec9af1
DM		 814 if (x->props.family == family &&
815 x->props.reqid == tmpl->reqid &&
3d6acfa7 816 (mark & x->mark.m) == x->mark.v &&
08ec9af1
DM		 817 !(x->props.flags & XFRM_STATE_WILDRECV) &&
818 xfrm_state_addr_check(x, daddr, saddr, family) &&
819 tmpl->mode == x->props.mode &&
820 tmpl->id.proto == x->id.proto &&
821 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
822 xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
823 &best, &acquire_in_progress, &error);
1da177e4
LT		 824 }
825
08ec9af1 826found:
1da177e4
LT		 827 x = best;
828 if (!x && !error && !acquire_in_progress) {
5c5d281a 829 if (tmpl->id.spi &&
bd55775c 830 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
edcd5821 831 tmpl->id.proto, family)) != NULL) {
37b08e34 832 to_put = x0;
1da177e4
LT		 833 error = -EEXIST;
834 goto out;
835 }
5447c5e4 836 x = xfrm_state_alloc(net);
1da177e4
LT		 837 if (x == NULL) {
838 error = -ENOMEM;
839 goto out;
840 }
841 /* Initialize temporary selector matching only
842 * to current session. */
843 xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
bd55775c 844 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1da177e4 845
e0d1caa7
VY		 846 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
847 if (error) {
848 x->km.state = XFRM_STATE_DEAD;
37b08e34 849 to_put = x;
e0d1caa7
VY		 850 x = NULL;
851 goto out;
852 }
853
1da177e4
LT		 854 if (km_query(x, tmpl, pol) == 0) {
855 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 856 list_add(&x->km.all, &net->xfrm.state_all);
857 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
858 h = xfrm_src_hash(net, daddr, saddr, family);
859 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 860 if (x->id.spi) {
5447c5e4
AD		 861 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, family);
862 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 863 }
b27aeadb 864 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 865 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 866 net->xfrm.state_num++;
867 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 868 } else {
869 x->km.state = XFRM_STATE_DEAD;
37b08e34 870 to_put = x;
1da177e4
LT		 871 x = NULL;
872 error = -ESRCH;
873 }
874 }
875out:
876 if (x)
877 xfrm_state_hold(x);
878 else
879 *err = acquire_in_progress ? -EAGAIN : error;
880 spin_unlock_bh(&xfrm_state_lock);
37b08e34
DM		 881 if (to_put)
882 xfrm_state_put(to_put);
1da177e4
LT		 883 return x;
884}
885
628529b6 886struct xfrm_state *
bd55775c 887xfrm_stateonly_find(struct net *net, u32 mark,
5447c5e4 888 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 889 unsigned short family, u8 mode, u8 proto, u32 reqid)
890{
4bda4f25 891 unsigned int h;
628529b6
JHS		 892 struct xfrm_state *rx = NULL, *x = NULL;
893 struct hlist_node *entry;
894
895 spin_lock(&xfrm_state_lock);
5447c5e4
AD		 896 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
897 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 898 if (x->props.family == family &&
899 x->props.reqid == reqid &&
3d6acfa7 900 (mark & x->mark.m) == x->mark.v &&
628529b6
JHS		 901 !(x->props.flags & XFRM_STATE_WILDRECV) &&
902 xfrm_state_addr_check(x, daddr, saddr, family) &&
903 mode == x->props.mode &&
904 proto == x->id.proto &&
905 x->km.state == XFRM_STATE_VALID) {
906 rx = x;
907 break;
908 }
909 }
910
911 if (rx)
912 xfrm_state_hold(rx);
913 spin_unlock(&xfrm_state_lock);
914
915
916 return rx;
917}
918EXPORT_SYMBOL(xfrm_stateonly_find);
919
1da177e4
LT		 920static void __xfrm_state_insert(struct xfrm_state *x)
921{
98806f75 922 struct net *net = xs_net(x);
a624c108 923 unsigned int h;
1da177e4 924
98806f75 925 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 926
98806f75 927 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 928 x->props.reqid, x->props.family);
98806f75 929 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 930
98806f75
AD		 931 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
932 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 933
7b4dc360 934 if (x->id.spi) {
98806f75 935 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 936 x->props.family);
937
98806f75 938 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 939 }
940
9e0d57fd 941 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 942 if (x->replay_maxage)
943 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 944
98806f75 945 wake_up(&net->xfrm.km_waitq);
f034b5d4 946
98806f75 947 net->xfrm.state_num++;
f034b5d4 948
98806f75 949 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 950}
951
c7f5ea3a
DM		 952/* xfrm_state_lock is held */
953static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
954{
98806f75 955 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 956 unsigned short family = xnew->props.family;
957 u32 reqid = xnew->props.reqid;
958 struct xfrm_state *x;
959 struct hlist_node *entry;
960 unsigned int h;
3d6acfa7 961 u32 mark = xnew->mark.v & xnew->mark.m;
c7f5ea3a 962
98806f75
AD		 963 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
964 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 965 if (x->props.family == family &&
966 x->props.reqid == reqid &&
3d6acfa7 967 (mark & x->mark.m) == x->mark.v &&
c1969f29
DM		 968 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
969 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 970 x->genid++;
c7f5ea3a
DM		 971 }
972}
973
1da177e4
LT		 974void xfrm_state_insert(struct xfrm_state *x)
975{
976 spin_lock_bh(&xfrm_state_lock);
c7f5ea3a 977 __xfrm_state_bump_genids(x);
1da177e4
LT		 978 __xfrm_state_insert(x);
979 spin_unlock_bh(&xfrm_state_lock);
980}
981EXPORT_SYMBOL(xfrm_state_insert);
982
2770834c 983/* xfrm_state_lock is held */
bd55775c 984static 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 985{
5447c5e4 986 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
8f126e37 987 struct hlist_node *entry;
2770834c 988 struct xfrm_state *x;
3d6acfa7 989 u32 mark = m->v & m->m;
2770834c 990
5447c5e4 991 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 992 if (x->props.reqid != reqid ||
993 x->props.mode != mode ||
994 x->props.family != family ||
995 x->km.state != XFRM_STATE_ACQ ||
75e252d9 996 x->id.spi != 0 ||
1802571b 997 x->id.proto != proto ||
3d6acfa7 998 (mark & x->mark.m) != x->mark.v ||
1802571b
WY		 999 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
1000 xfrm_addr_cmp(&x->props.saddr, saddr, family))
2770834c
DM		 1001 continue;
1002
2770834c
DM		 1003 xfrm_state_hold(x);
1004 return x;
1005 }
1006
1007 if (!create)
1008 return NULL;
1009
5447c5e4 1010 x = xfrm_state_alloc(net);
2770834c
DM		 1011 if (likely(x)) {
1012 switch (family) {
1013 case AF_INET:
1014 x->sel.daddr.a4 = daddr->a4;
1015 x->sel.saddr.a4 = saddr->a4;
1016 x->sel.prefixlen_d = 32;
1017 x->sel.prefixlen_s = 32;
1018 x->props.saddr.a4 = saddr->a4;
1019 x->id.daddr.a4 = daddr->a4;
1020 break;
1021
1022 case AF_INET6:
1023 ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
1024 (struct in6_addr *)daddr);
1025 ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
1026 (struct in6_addr *)saddr);
1027 x->sel.prefixlen_d = 128;
1028 x->sel.prefixlen_s = 128;
1029 ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
1030 (struct in6_addr *)saddr);
1031 ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
1032 (struct in6_addr *)daddr);
1033 break;
3ff50b79 1034 }
2770834c
DM		 1035
1036 x->km.state = XFRM_STATE_ACQ;
1037 x->id.proto = proto;
1038 x->props.family = family;
1039 x->props.mode = mode;
1040 x->props.reqid = reqid;
bd55775c
JHS		 1041 x->mark.v = m->v;
1042 x->mark.m = m->m;
b27aeadb 1043 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1044 xfrm_state_hold(x);
9e0d57fd 1045 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1046 list_add(&x->km.all, &net->xfrm.state_all);
1047 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1048 h = xfrm_src_hash(net, daddr, saddr, family);
1049 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1050
5447c5e4 1051 net->xfrm.state_num++;
918049f0 1052
5447c5e4 1053 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1054 }
1055
1056 return x;
1057}
1058
bd55775c 1059static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1060
1061int xfrm_state_add(struct xfrm_state *x)
1062{
5447c5e4 1063 struct net *net = xs_net(x);
37b08e34 1064 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1065 int family;
1066 int err;
bd55775c 1067 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1068 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1069
1070 family = x->props.family;
1da177e4 1071
37b08e34
DM		 1072 to_put = NULL;
1073
1da177e4
LT		 1074 spin_lock_bh(&xfrm_state_lock);
1075
edcd5821 1076 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1077 if (x1) {
37b08e34 1078 to_put = x1;
1da177e4
LT		 1079 x1 = NULL;
1080 err = -EEXIST;
1081 goto out;
1082 }
1083
eb2971b6 1084 if (use_spi && x->km.seq) {
bd55775c 1085 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9
JL		 1086 if (x1 && ((x1->id.proto != x->id.proto) ||
1087 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1088 to_put = x1;
1da177e4
LT		 1089 x1 = NULL;
1090 }
1091 }
1092
eb2971b6 1093 if (use_spi && !x1)
bd55775c
JHS		 1094 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1095 x->props.reqid, x->id.proto,
2770834c 1096 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1097
c7f5ea3a 1098 __xfrm_state_bump_genids(x);
1da177e4
LT		 1099 __xfrm_state_insert(x);
1100 err = 0;
1101
1102out:
1103 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1104
1105 if (x1) {
1106 xfrm_state_delete(x1);
1107 xfrm_state_put(x1);
1108 }
1109
37b08e34
DM		 1110 if (to_put)
1111 xfrm_state_put(to_put);
1112
1da177e4
LT		 1113 return err;
1114}
1115EXPORT_SYMBOL(xfrm_state_add);
1116
80c9abaa 1117#ifdef CONFIG_XFRM_MIGRATE
6666351d 1118static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1119{
98806f75 1120 struct net *net = xs_net(orig);
80c9abaa 1121 int err = -ENOMEM;
98806f75 1122 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1123 if (!x)
553f9118 1124 goto out;
80c9abaa
SS		 1125
1126 memcpy(&x->id, &orig->id, sizeof(x->id));
1127 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1128 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1129 x->props.mode = orig->props.mode;
1130 x->props.replay_window = orig->props.replay_window;
1131 x->props.reqid = orig->props.reqid;
1132 x->props.family = orig->props.family;
1133 x->props.saddr = orig->props.saddr;
1134
1135 if (orig->aalg) {
4447bb33 1136 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1137 if (!x->aalg)
1138 goto error;
1139 }
1140 x->props.aalgo = orig->props.aalgo;
1141
1142 if (orig->ealg) {
1143 x->ealg = xfrm_algo_clone(orig->ealg);
1144 if (!x->ealg)
1145 goto error;
1146 }
1147 x->props.ealgo = orig->props.ealgo;
1148
1149 if (orig->calg) {
1150 x->calg = xfrm_algo_clone(orig->calg);
1151 if (!x->calg)
1152 goto error;
1153 }
1154 x->props.calgo = orig->props.calgo;
1155
a716c119 1156 if (orig->encap) {
80c9abaa
SS		 1157 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1158 if (!x->encap)
1159 goto error;
1160 }
1161
1162 if (orig->coaddr) {
1163 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1164 GFP_KERNEL);
1165 if (!x->coaddr)
1166 goto error;
1167 }
1168
bd55775c
JHS		 1169 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1170
80c9abaa
SS		 1171 err = xfrm_init_state(x);
1172 if (err)
1173 goto error;
1174
1175 x->props.flags = orig->props.flags;
1176
1177 x->curlft.add_time = orig->curlft.add_time;
1178 x->km.state = orig->km.state;
1179 x->km.seq = orig->km.seq;
1180
1181 return x;
1182
1183 error:
553f9118
HX		 1184 xfrm_state_put(x);
1185out:
80c9abaa
SS		 1186 if (errp)
1187 *errp = err;
80c9abaa
SS		 1188 return NULL;
1189}
80c9abaa
SS		 1190
1191/* xfrm_state_lock is held */
1192struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1193{
1194 unsigned int h;
1195 struct xfrm_state *x;
1196 struct hlist_node *entry;
1197
1198 if (m->reqid) {
64d0cd00 1199 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1200 m->reqid, m->old_family);
73d189dc 1201 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1202 if (x->props.mode != m->mode ||
1203 x->id.proto != m->proto)
1204 continue;
1205 if (m->reqid && x->props.reqid != m->reqid)
1206 continue;
1207 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1208 m->old_family) ||
1209 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1210 m->old_family))
1211 continue;
1212 xfrm_state_hold(x);
1213 return x;
1214 }
1215 } else {
64d0cd00 1216 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
80c9abaa 1217 m->old_family);
d320bbb3 1218 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1219 if (x->props.mode != m->mode ||
1220 x->id.proto != m->proto)
1221 continue;
1222 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1223 m->old_family) ||
1224 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1225 m->old_family))
1226 continue;
1227 xfrm_state_hold(x);
1228 return x;
1229 }
1230 }
1231
a716c119 1232 return NULL;
80c9abaa
SS		 1233}
1234EXPORT_SYMBOL(xfrm_migrate_state_find);
1235
1236struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1237 struct xfrm_migrate *m)
1238{
1239 struct xfrm_state *xc;
1240 int err;
1241
1242 xc = xfrm_state_clone(x, &err);
1243 if (!xc)
1244 return NULL;
1245
1246 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1247 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1248
1249 /* add state */
1250 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1251 /* a care is needed when the destination address of the
1252 state is to be updated as it is a part of triplet */
1253 xfrm_state_insert(xc);
1254 } else {
1255 if ((err = xfrm_state_add(xc)) < 0)
1256 goto error;
1257 }
1258
1259 return xc;
1260error:
1261 kfree(xc);
1262 return NULL;
1263}
1264EXPORT_SYMBOL(xfrm_state_migrate);
1265#endif
1266
1da177e4
LT		 1267int xfrm_state_update(struct xfrm_state *x)
1268{
37b08e34 1269 struct xfrm_state *x1, *to_put;
1da177e4 1270 int err;
eb2971b6 1271 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4 1272
37b08e34
DM		 1273 to_put = NULL;
1274
1da177e4 1275 spin_lock_bh(&xfrm_state_lock);
edcd5821 1276 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1277
1278 err = -ESRCH;
1279 if (!x1)
1280 goto out;
1281
1282 if (xfrm_state_kern(x1)) {
37b08e34 1283 to_put = x1;
1da177e4
LT		 1284 err = -EEXIST;
1285 goto out;
1286 }
1287
1288 if (x1->km.state == XFRM_STATE_ACQ) {
1289 __xfrm_state_insert(x);
1290 x = NULL;
1291 }
1292 err = 0;
1293
1294out:
1295 spin_unlock_bh(&xfrm_state_lock);
1da177e4 1296
37b08e34
DM		 1297 if (to_put)
1298 xfrm_state_put(to_put);
1299
1da177e4
LT		 1300 if (err)
1301 return err;
1302
1303 if (!x) {
1304 xfrm_state_delete(x1);
1305 xfrm_state_put(x1);
1306 return 0;
1307 }
1308
1309 err = -EINVAL;
1310 spin_lock_bh(&x1->lock);
1311 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1312 if (x->encap && x1->encap)
1313 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1314 if (x->coaddr && x1->coaddr) {
1315 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1316 }
1317 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1318 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1319 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1320 x1->km.dying = 0;
1321
9e0d57fd 1322 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1323 if (x1->curlft.use_time)
1324 xfrm_state_check_expire(x1);
1325
1326 err = 0;
1327 }
1328 spin_unlock_bh(&x1->lock);
1329
1330 xfrm_state_put(x1);
1331
1332 return err;
1333}
1334EXPORT_SYMBOL(xfrm_state_update);
1335
1336int xfrm_state_check_expire(struct xfrm_state *x)
1337{
1338 if (!x->curlft.use_time)
9d729f72 1339 x->curlft.use_time = get_seconds();
1da177e4
LT		 1340
1341 if (x->km.state != XFRM_STATE_VALID)
1342 return -EINVAL;
1343
1344 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1345 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1346 x->km.state = XFRM_STATE_EXPIRED;
9e0d57fd 1347 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1da177e4
LT		 1348 return -EINVAL;
1349 }
1350
1351 if (!x->km.dying &&
1352 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1353 x->curlft.packets >= x->lft.soft_packet_limit)) {
1354 x->km.dying = 1;
53bc6b4d 1355 km_state_expired(x, 0, 0);
4666faab 1356 }
1da177e4
LT		 1357 return 0;
1358}
1359EXPORT_SYMBOL(xfrm_state_check_expire);
1360
1da177e4 1361struct xfrm_state *
bd55775c
JHS		 1362xfrm_state_lookup(struct net *net, u32 mark, xfrm_address_t *daddr, __be32 spi,
1363 u8 proto, unsigned short family)
1da177e4
LT		 1364{
1365 struct xfrm_state *x;
1da177e4
LT		 1366
1367 spin_lock_bh(&xfrm_state_lock);
bd55775c 1368 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
1da177e4 1369 spin_unlock_bh(&xfrm_state_lock);
1da177e4
LT		 1370 return x;
1371}
1372EXPORT_SYMBOL(xfrm_state_lookup);
1373
1374struct xfrm_state *
bd55775c 1375xfrm_state_lookup_byaddr(struct net *net, u32 mark,
221df1ed 1376 xfrm_address_t *daddr, xfrm_address_t *saddr,
eb2971b6
MN		 1377 u8 proto, unsigned short family)
1378{
1379 struct xfrm_state *x;
eb2971b6
MN		 1380
1381 spin_lock_bh(&xfrm_state_lock);
bd55775c 1382 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
eb2971b6 1383 spin_unlock_bh(&xfrm_state_lock);
eb2971b6
MN		 1384 return x;
1385}
1386EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1387
1388struct xfrm_state *
bd55775c 1389xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
a716c119 1390 xfrm_address_t *daddr, xfrm_address_t *saddr,
1da177e4
LT		 1391 int create, unsigned short family)
1392{
1393 struct xfrm_state *x;
1da177e4
LT		 1394
1395 spin_lock_bh(&xfrm_state_lock);
bd55775c 1396 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
1da177e4 1397 spin_unlock_bh(&xfrm_state_lock);
2770834c 1398
1da177e4
LT		 1399 return x;
1400}
1401EXPORT_SYMBOL(xfrm_find_acq);
1402
41a49cc3
MN		 1403#ifdef CONFIG_XFRM_SUB_POLICY
1404int
1405xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1406 unsigned short family)
1407{
1408 int err = 0;
1409 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1410 if (!afinfo)
1411 return -EAFNOSUPPORT;
1412
1413 spin_lock_bh(&xfrm_state_lock);
1414 if (afinfo->tmpl_sort)
1415 err = afinfo->tmpl_sort(dst, src, n);
1416 spin_unlock_bh(&xfrm_state_lock);
1417 xfrm_state_put_afinfo(afinfo);
1418 return err;
1419}
1420EXPORT_SYMBOL(xfrm_tmpl_sort);
1421
1422int
1423xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1424 unsigned short family)
1425{
1426 int err = 0;
1427 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1428 if (!afinfo)
1429 return -EAFNOSUPPORT;
1430
1431 spin_lock_bh(&xfrm_state_lock);
1432 if (afinfo->state_sort)
1433 err = afinfo->state_sort(dst, src, n);
1434 spin_unlock_bh(&xfrm_state_lock);
1435 xfrm_state_put_afinfo(afinfo);
1436 return err;
1437}
1438EXPORT_SYMBOL(xfrm_state_sort);
1439#endif
1440
1da177e4
LT		 1441/* Silly enough, but I'm lazy to build resolution list */
1442
bd55775c 1443static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1444{
1445 int i;
1da177e4 1446
5447c5e4 1447 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1448 struct hlist_node *entry;
1449 struct xfrm_state *x;
1450
5447c5e4 1451 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
8f126e37 1452 if (x->km.seq == seq &&
3d6acfa7 1453 (mark & x->mark.m) == x->mark.v &&
8f126e37 1454 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1455 xfrm_state_hold(x);
1456 return x;
1457 }
1458 }
1459 }
1460 return NULL;
1461}
1462
bd55775c 1463struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1464{
1465 struct xfrm_state *x;
1466
1467 spin_lock_bh(&xfrm_state_lock);
bd55775c 1468 x = __xfrm_find_acq_byseq(net, mark, seq);
1da177e4
LT		 1469 spin_unlock_bh(&xfrm_state_lock);
1470 return x;
1471}
1472EXPORT_SYMBOL(xfrm_find_acq_byseq);
1473
1474u32 xfrm_get_acqseq(void)
1475{
1476 u32 res;
6836b9bd 1477 static atomic_t acqseq;
1478
1479 do {
1480 res = atomic_inc_return(&acqseq);
1481 } while (!res);
1da177e4 1482
1da177e4
LT		 1483 return res;
1484}
1485EXPORT_SYMBOL(xfrm_get_acqseq);
1486
658b219e 1487int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1488{
221df1ed 1489 struct net *net = xs_net(x);
f034b5d4 1490 unsigned int h;
1da177e4 1491 struct xfrm_state *x0;
658b219e
HX		 1492 int err = -ENOENT;
1493 __be32 minspi = htonl(low);
1494 __be32 maxspi = htonl(high);
bd55775c 1495 u32 mark = x->mark.v & x->mark.m;
1da177e4 1496
658b219e
HX		 1497 spin_lock_bh(&x->lock);
1498 if (x->km.state == XFRM_STATE_DEAD)
1499 goto unlock;
1500
1501 err = 0;
1da177e4 1502 if (x->id.spi)
658b219e
HX		 1503 goto unlock;
1504
1505 err = -ENOENT;
1da177e4
LT		 1506
1507 if (minspi == maxspi) {
bd55775c 1508 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1509 if (x0) {
1510 xfrm_state_put(x0);
658b219e 1511 goto unlock;
1da177e4
LT		 1512 }
1513 x->id.spi = minspi;
1514 } else {
1515 u32 spi = 0;
26977b4e
AV		 1516 for (h=0; h<high-low+1; h++) {
1517 spi = low + net_random()%(high-low+1);
bd55775c 1518 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1519 if (x0 == NULL) {
1520 x->id.spi = htonl(spi);
1521 break;
1522 }
1523 xfrm_state_put(x0);
1524 }
1525 }
1526 if (x->id.spi) {
1527 spin_lock_bh(&xfrm_state_lock);
12604d8a
AD		 1528 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1529 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 1530 spin_unlock_bh(&xfrm_state_lock);
658b219e
HX		 1531
1532 err = 0;
1da177e4 1533 }
658b219e
HX		 1534
1535unlock:
1536 spin_unlock_bh(&x->lock);
1537
1538 return err;
1da177e4
LT		 1539}
1540EXPORT_SYMBOL(xfrm_alloc_spi);
1541
284fa7da 1542int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1543 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1544 void *data)
1545{
12a169e7
HX		 1546 struct xfrm_state *state;
1547 struct xfrm_state_walk *x;
1da177e4
LT		 1548 int err = 0;
1549
12a169e7 1550 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1551 return 0;
1552
1da177e4 1553 spin_lock_bh(&xfrm_state_lock);
12a169e7 1554 if (list_empty(&walk->all))
284fa7da 1555 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1556 else
1557 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1558 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1559 if (x->state == XFRM_STATE_DEAD)
4c563f76 1560 continue;
12a169e7
HX		 1561 state = container_of(x, struct xfrm_state, km);
1562 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1563 continue;
12a169e7
HX		 1564 err = func(state, walk->seq, data);
1565 if (err) {
1566 list_move_tail(&walk->all, &x->all);
1567 goto out;
1da177e4 1568 }
12a169e7 1569 walk->seq++;
1da177e4 1570 }
12a169e7 1571 if (walk->seq == 0) {
1da177e4
LT		 1572 err = -ENOENT;
1573 goto out;
1574 }
12a169e7 1575 list_del_init(&walk->all);
1da177e4
LT		 1576out:
1577 spin_unlock_bh(&xfrm_state_lock);
1578 return err;
1579}
1580EXPORT_SYMBOL(xfrm_state_walk);
1581
5c182458
HX		 1582void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1583{
12a169e7 1584 INIT_LIST_HEAD(&walk->all);
5c182458 1585 walk->proto = proto;
12a169e7
HX		 1586 walk->state = XFRM_STATE_DEAD;
1587 walk->seq = 0;
5c182458
HX		 1588}
1589EXPORT_SYMBOL(xfrm_state_walk_init);
1590
abb81c4f
HX		 1591void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1592{
12a169e7 1593 if (list_empty(&walk->all))
5c182458 1594 return;
5c182458 1595
12a169e7
HX		 1596 spin_lock_bh(&xfrm_state_lock);
1597 list_del(&walk->all);
7d0b591c 1598 spin_unlock_bh(&xfrm_state_lock);
abb81c4f
HX		 1599}
1600EXPORT_SYMBOL(xfrm_state_walk_done);
1601
f8cd5488
JHS		 1602
1603void xfrm_replay_notify(struct xfrm_state *x, int event)
1604{
1605 struct km_event c;
1606 /* we send notify messages in case
1607 * 1. we updated on of the sequence numbers, and the seqno difference
1608 * is at least x->replay_maxdiff, in this case we also update the
1609 * timeout of our timer function
1610 * 2. if x->replay_maxage has elapsed since last update,
1611 * and there were changes
1612 *
1613 * The state structure must be locked!
1614 */
1615
1616 switch (event) {
1617 case XFRM_REPLAY_UPDATE:
1618 if (x->replay_maxdiff &&
1619 (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
2717096a
JHS		 1620 (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
1621 if (x->xflags & XFRM_TIME_DEFER)
1622 event = XFRM_REPLAY_TIMEOUT;
1623 else
1624 return;
1625 }
f8cd5488
JHS		 1626
1627 break;
1628
1629 case XFRM_REPLAY_TIMEOUT:
1630 if ((x->replay.seq == x->preplay.seq) &&
1631 (x->replay.bitmap == x->preplay.bitmap) &&
2717096a
JHS		 1632 (x->replay.oseq == x->preplay.oseq)) {
1633 x->xflags |= XFRM_TIME_DEFER;
f8cd5488 1634 return;
2717096a 1635 }
f8cd5488
JHS		 1636
1637 break;
1638 }
1639
1640 memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
1641 c.event = XFRM_MSG_NEWAE;
1642 c.data.aevent = event;
1643 km_state_notify(x, &c);
1644
f8cd5488 1645 if (x->replay_maxage &&
a47f0ce0 1646 !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
2717096a 1647 x->xflags &= ~XFRM_TIME_DEFER;
f8cd5488
JHS		 1648}
1649
1650static void xfrm_replay_timer_handler(unsigned long data)
1651{
1652 struct xfrm_state *x = (struct xfrm_state*)data;
1653
1654 spin_lock(&x->lock);
1655
2717096a 1656 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1657 if (xfrm_aevent_is_on(xs_net(x)))
2717096a
JHS		 1658 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
1659 else
1660 x->xflags |= XFRM_TIME_DEFER;
1661 }
f8cd5488
JHS		 1662
1663 spin_unlock(&x->lock);
1664}
1665
afeb14b4
PM		 1666int xfrm_replay_check(struct xfrm_state *x,
1667 struct sk_buff *skb, __be32 net_seq)
1da177e4
LT		 1668{
1669 u32 diff;
a252cc23 1670 u32 seq = ntohl(net_seq);
1da177e4
LT		 1671
1672 if (unlikely(seq == 0))
afeb14b4 1673 goto err;
1da177e4
LT		 1674
1675 if (likely(seq > x->replay.seq))
1676 return 0;
1677
1678 diff = x->replay.seq - seq;
4c4d51a7
HX		 1679 if (diff >= min_t(unsigned int, x->props.replay_window,
1680 sizeof(x->replay.bitmap) * 8)) {
1da177e4 1681 x->stats.replay_window++;
afeb14b4 1682 goto err;
1da177e4
LT		 1683 }
1684
1685 if (x->replay.bitmap & (1U << diff)) {
1686 x->stats.replay++;
afeb14b4 1687 goto err;
1da177e4
LT		 1688 }
1689 return 0;
afeb14b4
PM		 1690
1691err:
1692 xfrm_audit_state_replay(x, skb, net_seq);
1693 return -EINVAL;
1da177e4 1694}
1da177e4 1695
61f4627b 1696void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
1da177e4
LT		 1697{
1698 u32 diff;
61f4627b 1699 u32 seq = ntohl(net_seq);
1da177e4
LT		 1700
1701 if (seq > x->replay.seq) {
1702 diff = seq - x->replay.seq;
1703 if (diff < x->props.replay_window)
1704 x->replay.bitmap = ((x->replay.bitmap) << diff) | 1;
1705 else
1706 x->replay.bitmap = 1;
1707 x->replay.seq = seq;
1708 } else {
1709 diff = x->replay.seq - seq;
1710 x->replay.bitmap |= (1U << diff);
1711 }
f8cd5488 1712
a6483b79 1713 if (xfrm_aevent_is_on(xs_net(x)))
f8cd5488 1714 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1da177e4 1715}
1da177e4 1716
df01812e 1717static LIST_HEAD(xfrm_km_list);
1da177e4
LT		 1718static DEFINE_RWLOCK(xfrm_km_lock);
1719
26b15dad 1720void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 1721{
1722 struct xfrm_mgr *km;
1723
26b15dad
JHS		 1724 read_lock(&xfrm_km_lock);
1725 list_for_each_entry(km, &xfrm_km_list, list)
1726 if (km->notify_policy)
1727 km->notify_policy(xp, dir, c);
1728 read_unlock(&xfrm_km_lock);
1729}
1da177e4 1730
26b15dad
JHS		 1731void km_state_notify(struct xfrm_state *x, struct km_event *c)
1732{
1733 struct xfrm_mgr *km;
1da177e4
LT		 1734 read_lock(&xfrm_km_lock);
1735 list_for_each_entry(km, &xfrm_km_list, list)
26b15dad
JHS		 1736 if (km->notify)
1737 km->notify(x, c);
1da177e4 1738 read_unlock(&xfrm_km_lock);
26b15dad
JHS		 1739}
1740
1741EXPORT_SYMBOL(km_policy_notify);
1742EXPORT_SYMBOL(km_state_notify);
1743
53bc6b4d 1744void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
26b15dad 1745{
98806f75 1746 struct net *net = xs_net(x);
26b15dad
JHS		 1747 struct km_event c;
1748
bf08867f 1749 c.data.hard = hard;
53bc6b4d 1750 c.pid = pid;
f60f6b8f 1751 c.event = XFRM_MSG_EXPIRE;
26b15dad 1752 km_state_notify(x, &c);
1da177e4
LT		 1753
1754 if (hard)
98806f75 1755 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1756}
1757
53bc6b4d 1758EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1759/*
1760 * We send to all registered managers regardless of failure
1761 * We are happy with one success
1762*/
980ebd25 1763int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1764{
26b15dad 1765 int err = -EINVAL, acqret;
1da177e4
LT		 1766 struct xfrm_mgr *km;
1767
1768 read_lock(&xfrm_km_lock);
1769 list_for_each_entry(km, &xfrm_km_list, list) {
26b15dad
JHS		 1770 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1771 if (!acqret)
1772 err = acqret;
1da177e4
LT		 1773 }
1774 read_unlock(&xfrm_km_lock);
1775 return err;
1776}
980ebd25 1777EXPORT_SYMBOL(km_query);
1da177e4 1778
5d36b180 1779int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1780{
1781 int err = -EINVAL;
1782 struct xfrm_mgr *km;
1783
1784 read_lock(&xfrm_km_lock);
1785 list_for_each_entry(km, &xfrm_km_list, list) {
1786 if (km->new_mapping)
1787 err = km->new_mapping(x, ipaddr, sport);
1788 if (!err)
1789 break;
1790 }
1791 read_unlock(&xfrm_km_lock);
1792 return err;
1793}
1794EXPORT_SYMBOL(km_new_mapping);
1795
6c5c8ca7 1796void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
1da177e4 1797{
98806f75 1798 struct net *net = xp_net(pol);
26b15dad 1799 struct km_event c;
1da177e4 1800
bf08867f 1801 c.data.hard = hard;
6c5c8ca7 1802 c.pid = pid;
f60f6b8f 1803 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1804 km_policy_notify(pol, dir, &c);
1da177e4
LT		 1805
1806 if (hard)
98806f75 1807 wake_up(&net->xfrm.km_waitq);
1da177e4 1808}
a70fcb0b 1809EXPORT_SYMBOL(km_policy_expired);
1da177e4 1810
2d60abc2 1811#ifdef CONFIG_XFRM_MIGRATE
80c9abaa 1812int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1813 struct xfrm_migrate *m, int num_migrate,
1814 struct xfrm_kmaddress *k)
80c9abaa
SS		 1815{
1816 int err = -EINVAL;
1817 int ret;
1818 struct xfrm_mgr *km;
1819
1820 read_lock(&xfrm_km_lock);
1821 list_for_each_entry(km, &xfrm_km_list, list) {
1822 if (km->migrate) {
13c1d189 1823 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1824 if (!ret)
1825 err = ret;
1826 }
1827 }
1828 read_unlock(&xfrm_km_lock);
1829 return err;
1830}
1831EXPORT_SYMBOL(km_migrate);
2d60abc2 1832#endif
80c9abaa 1833
db983c11 1834int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1835{
1836 int err = -EINVAL;
1837 int ret;
1838 struct xfrm_mgr *km;
1839
1840 read_lock(&xfrm_km_lock);
1841 list_for_each_entry(km, &xfrm_km_list, list) {
1842 if (km->report) {
db983c11 1843 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1844 if (!ret)
1845 err = ret;
1846 }
1847 }
1848 read_unlock(&xfrm_km_lock);
1849 return err;
1850}
1851EXPORT_SYMBOL(km_report);
1852
1da177e4
LT		 1853int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1854{
1855 int err;
1856 u8 *data;
1857 struct xfrm_mgr *km;
1858 struct xfrm_policy *pol = NULL;
1859
1860 if (optlen <= 0 || optlen > PAGE_SIZE)
1861 return -EMSGSIZE;
1862
1863 data = kmalloc(optlen, GFP_KERNEL);
1864 if (!data)
1865 return -ENOMEM;
1866
1867 err = -EFAULT;
1868 if (copy_from_user(data, optval, optlen))
1869 goto out;
1870
1871 err = -EINVAL;
1872 read_lock(&xfrm_km_lock);
1873 list_for_each_entry(km, &xfrm_km_list, list) {
cb969f07 1874 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1875 optlen, &err);
1876 if (err >= 0)
1877 break;
1878 }
1879 read_unlock(&xfrm_km_lock);
1880
1881 if (err >= 0) {
1882 xfrm_sk_policy_insert(sk, err, pol);
1883 xfrm_pol_put(pol);
1884 err = 0;
1885 }
1886
1887out:
1888 kfree(data);
1889 return err;
1890}
1891EXPORT_SYMBOL(xfrm_user_policy);
1892
1893int xfrm_register_km(struct xfrm_mgr *km)
1894{
1895 write_lock_bh(&xfrm_km_lock);
1896 list_add_tail(&km->list, &xfrm_km_list);
1897 write_unlock_bh(&xfrm_km_lock);
1898 return 0;
1899}
1900EXPORT_SYMBOL(xfrm_register_km);
1901
1902int xfrm_unregister_km(struct xfrm_mgr *km)
1903{
1904 write_lock_bh(&xfrm_km_lock);
1905 list_del(&km->list);
1906 write_unlock_bh(&xfrm_km_lock);
1907 return 0;
1908}
1909EXPORT_SYMBOL(xfrm_unregister_km);
1910
1911int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1912{
1913 int err = 0;
1914 if (unlikely(afinfo == NULL))
1915 return -EINVAL;
1916 if (unlikely(afinfo->family >= NPROTO))
1917 return -EAFNOSUPPORT;
f3111502 1918 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1919 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1920 err = -ENOBUFS;
edcd5821 1921 else
1da177e4 1922 xfrm_state_afinfo[afinfo->family] = afinfo;
f3111502 1923 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1924 return err;
1925}
1926EXPORT_SYMBOL(xfrm_state_register_afinfo);
1927
1928int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1929{
1930 int err = 0;
1931 if (unlikely(afinfo == NULL))
1932 return -EINVAL;
1933 if (unlikely(afinfo->family >= NPROTO))
1934 return -EAFNOSUPPORT;
f3111502 1935 write_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1936 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1937 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1938 err = -EINVAL;
edcd5821 1939 else
1da177e4 1940 xfrm_state_afinfo[afinfo->family] = NULL;
1da177e4 1941 }
f3111502 1942 write_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1943 return err;
1944}
1945EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1946
17c2a42a 1947static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1948{
1949 struct xfrm_state_afinfo *afinfo;
1950 if (unlikely(family >= NPROTO))
1951 return NULL;
1952 read_lock(&xfrm_state_afinfo_lock);
1953 afinfo = xfrm_state_afinfo[family];
546be240
HX		 1954 if (unlikely(!afinfo))
1955 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1956 return afinfo;
1957}
1958
17c2a42a 1959static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
9a429c49 1960 __releases(xfrm_state_afinfo_lock)
1da177e4 1961{
546be240 1962 read_unlock(&xfrm_state_afinfo_lock);
1da177e4
LT		 1963}
1964
1965/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1966void xfrm_state_delete_tunnel(struct xfrm_state *x)
1967{
1968 if (x->tunnel) {
1969 struct xfrm_state *t = x->tunnel;
1970
1971 if (atomic_read(&t->tunnel_users) == 2)
1972 xfrm_state_delete(t);
1973 atomic_dec(&t->tunnel_users);
1974 xfrm_state_put(t);
1975 x->tunnel = NULL;
1976 }
1977}
1978EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1979
1980int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1981{
c5c25238 1982 int res;
1da177e4 1983
c5c25238
PM		 1984 spin_lock_bh(&x->lock);
1985 if (x->km.state == XFRM_STATE_VALID &&
1986 x->type && x->type->get_mtu)
1987 res = x->type->get_mtu(x, mtu);
1988 else
28121617 1989 res = mtu - x->props.header_len;
c5c25238 1990 spin_unlock_bh(&x->lock);
1da177e4
LT		 1991 return res;
1992}
1993
72cb6962
HX		 1994int xfrm_init_state(struct xfrm_state *x)
1995{
d094cd83 1996 struct xfrm_state_afinfo *afinfo;
df9dcb45 1997 struct xfrm_mode *inner_mode;
d094cd83 1998 int family = x->props.family;
72cb6962
HX		 1999 int err;
2000
d094cd83
HX		 2001 err = -EAFNOSUPPORT;
2002 afinfo = xfrm_state_get_afinfo(family);
2003 if (!afinfo)
2004 goto error;
2005
2006 err = 0;
2007 if (afinfo->init_flags)
2008 err = afinfo->init_flags(x);
2009
2010 xfrm_state_put_afinfo(afinfo);
2011
2012 if (err)
2013 goto error;
2014
2015 err = -EPROTONOSUPPORT;
13996378 2016
df9dcb45
KM		 2017 if (x->sel.family != AF_UNSPEC) {
2018 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2019 if (inner_mode == NULL)
2020 goto error;
2021
2022 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2023 family != x->sel.family) {
2024 xfrm_put_mode(inner_mode);
2025 goto error;
2026 }
2027
2028 x->inner_mode = inner_mode;
2029 } else {
2030 struct xfrm_mode *inner_mode_iaf;
d81d2285 2031 int iafamily = AF_INET;
df9dcb45 2032
d81d2285 2033 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2034 if (inner_mode == NULL)
2035 goto error;
2036
2037 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2038 xfrm_put_mode(inner_mode);
2039 goto error;
2040 }
d81d2285 2041 x->inner_mode = inner_mode;
df9dcb45 2042
d81d2285
MW		 2043 if (x->props.family == AF_INET)
2044 iafamily = AF_INET6;
df9dcb45 2045
d81d2285
MW		 2046 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2047 if (inner_mode_iaf) {
2048 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2049 x->inner_mode_iaf = inner_mode_iaf;
2050 else
2051 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 2052 }
2053 }
13996378 2054
d094cd83 2055 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2056 if (x->type == NULL)
2057 goto error;
2058
2059 err = x->type->init_state(x);
2060 if (err)
2061 goto error;
2062
13996378
HX		 2063 x->outer_mode = xfrm_get_mode(x->props.mode, family);
2064 if (x->outer_mode == NULL)
b59f45d0
HX		 2065 goto error;
2066
72cb6962
HX		 2067 x->km.state = XFRM_STATE_VALID;
2068
2069error:
2070 return err;
2071}
2072
2073EXPORT_SYMBOL(xfrm_init_state);
a716c119 2074
d62ddc21 2075int __net_init xfrm_state_init(struct net *net)
1da177e4 2076{
f034b5d4
DM		 2077 unsigned int sz;
2078
9d4139c7
AD		 2079 INIT_LIST_HEAD(&net->xfrm.state_all);
2080
f034b5d4
DM		 2081 sz = sizeof(struct hlist_head) * 8;
2082
73d189dc
AD		 2083 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2084 if (!net->xfrm.state_bydst)
2085 goto out_bydst;
d320bbb3
AD		 2086 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2087 if (!net->xfrm.state_bysrc)
2088 goto out_bysrc;
b754a4fd
AD		 2089 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2090 if (!net->xfrm.state_byspi)
2091 goto out_byspi;
529983ec 2092 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2093
0bf7c5b0 2094 net->xfrm.state_num = 0;
63082733 2095 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2096 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2097 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
50a30657 2098 init_waitqueue_head(&net->xfrm.km_waitq);
d62ddc21 2099 return 0;
73d189dc 2100
b754a4fd
AD		 2101out_byspi:
2102 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2103out_bysrc:
2104 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2105out_bydst:
2106 return -ENOMEM;
d62ddc21
AD		 2107}
2108
2109void xfrm_state_fini(struct net *net)
2110{
7c2776ee 2111 struct xfrm_audit audit_info;
73d189dc
AD		 2112 unsigned int sz;
2113
7c2776ee
AD		 2114 flush_work(&net->xfrm.state_hash_work);
2115 audit_info.loginuid = -1;
2116 audit_info.sessionid = -1;
2117 audit_info.secid = 0;
2118 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2119 flush_work(&net->xfrm.state_gc_work);
2120
9d4139c7 2121 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2122
529983ec 2123 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2124 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2125 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2126 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2127 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2128 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2129 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2130}
2131
ab5f5e8b 2132#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2133static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2134 struct audit_buffer *audit_buf)
ab5f5e8b 2135{
68277acc
PM		 2136 struct xfrm_sec_ctx *ctx = x->security;
2137 u32 spi = ntohl(x->id.spi);
2138
2139 if (ctx)
ab5f5e8b 2140 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2141 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2142
2143 switch(x->props.family) {
2144 case AF_INET:
21454aaa
HH		 2145 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2146 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2147 break;
2148 case AF_INET6:
5b095d98 2149 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2150 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2151 break;
2152 }
68277acc
PM		 2153
2154 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2155}
2156
cf35f43e
IJ		 2157static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2158 struct audit_buffer *audit_buf)
afeb14b4
PM		 2159{
2160 struct iphdr *iph4;
2161 struct ipv6hdr *iph6;
2162
2163 switch (family) {
2164 case AF_INET:
2165 iph4 = ip_hdr(skb);
21454aaa
HH		 2166 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2167 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2168 break;
2169 case AF_INET6:
2170 iph6 = ipv6_hdr(skb);
2171 audit_log_format(audit_buf,
5b095d98 2172 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2173 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2174 iph6->flow_lbl[0] & 0x0f,
2175 iph6->flow_lbl[1],
2176 iph6->flow_lbl[2]);
2177 break;
2178 }
2179}
2180
68277acc 2181void xfrm_audit_state_add(struct xfrm_state *x, int result,
2532386f 2182 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2183{
2184 struct audit_buffer *audit_buf;
ab5f5e8b 2185
afeb14b4 2186 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2187 if (audit_buf == NULL)
2188 return;
2532386f 2189 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2190 xfrm_audit_helper_sainfo(x, audit_buf);
2191 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2192 audit_log_end(audit_buf);
2193}
2194EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2195
68277acc 2196void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2532386f 2197 uid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2198{
2199 struct audit_buffer *audit_buf;
ab5f5e8b 2200
afeb14b4 2201 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2202 if (audit_buf == NULL)
2203 return;
2532386f 2204 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2205 xfrm_audit_helper_sainfo(x, audit_buf);
2206 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2207 audit_log_end(audit_buf);
2208}
2209EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2210
2211void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2212 struct sk_buff *skb)
2213{
2214 struct audit_buffer *audit_buf;
2215 u32 spi;
2216
2217 audit_buf = xfrm_audit_start("SA-replay-overflow");
2218 if (audit_buf == NULL)
2219 return;
2220 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2221 /* don't record the sequence number because it's inherent in this kind
2222 * of audit message */
2223 spi = ntohl(x->id.spi);
2224 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2225 audit_log_end(audit_buf);
2226}
2227EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2228
2229static void xfrm_audit_state_replay(struct xfrm_state *x,
2230 struct sk_buff *skb, __be32 net_seq)
2231{
2232 struct audit_buffer *audit_buf;
2233 u32 spi;
2234
2235 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2236 if (audit_buf == NULL)
2237 return;
2238 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2239 spi = ntohl(x->id.spi);
2240 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2241 spi, spi, ntohl(net_seq));
2242 audit_log_end(audit_buf);
2243}
2244
2245void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2246{
2247 struct audit_buffer *audit_buf;
2248
2249 audit_buf = xfrm_audit_start("SA-notfound");
2250 if (audit_buf == NULL)
2251 return;
2252 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2253 audit_log_end(audit_buf);
2254}
2255EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2256
2257void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2258 __be32 net_spi, __be32 net_seq)
2259{
2260 struct audit_buffer *audit_buf;
2261 u32 spi;
2262
2263 audit_buf = xfrm_audit_start("SA-notfound");
2264 if (audit_buf == NULL)
2265 return;
2266 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2267 spi = ntohl(net_spi);
2268 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2269 spi, spi, ntohl(net_seq));
2270 audit_log_end(audit_buf);
2271}
2272EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2273
2274void xfrm_audit_state_icvfail(struct xfrm_state *x,
2275 struct sk_buff *skb, u8 proto)
2276{
2277 struct audit_buffer *audit_buf;
2278 __be32 net_spi;
2279 __be32 net_seq;
2280
2281 audit_buf = xfrm_audit_start("SA-icv-failure");
2282 if (audit_buf == NULL)
2283 return;
2284 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2285 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2286 u32 spi = ntohl(net_spi);
2287 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2288 spi, spi, ntohl(net_seq));
2289 }
2290 audit_log_end(audit_buf);
2291}
2292EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2293#endif /* CONFIG_AUDITSYSCALL */
kernel source for telekom puls (alcatel/mediatek)