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Merge branch 'bridge_cleanups'
[mirror_ubuntu-artful-kernel.git] / net / xfrm / xfrm_state.c
CommitLineData
1da177e4
LT		 1/*
2 * xfrm_state.c
3 *
4 * Changes:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
df71837d 13 *
1da177e4
LT		 14 */
15
16#include <linux/workqueue.h>
17#include <net/xfrm.h>
18#include <linux/pfkeyv2.h>
19#include <linux/ipsec.h>
20#include <linux/module.h>
f034b5d4 21#include <linux/cache.h>
68277acc 22#include <linux/audit.h>
b5890d8b 23#include <asm/uaccess.h>
9e0d57fd 24#include <linux/ktime.h>
5a0e3ad6 25#include <linux/slab.h>
9e0d57fd
YP		 26#include <linux/interrupt.h>
27#include <linux/kernel.h>
1da177e4 28
44e36b42
DM		 29#include "xfrm_hash.h"
30
1da177e4
LT		 31/* Each xfrm_state may be linked to two tables:
32
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 34 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 35 destination/tunnel endpoint. (output)
36 */
37
f034b5d4 38static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
f034b5d4 39
64d0cd00 40static inline unsigned int xfrm_dst_hash(struct net *net,
2ab38503
DM		 41 const xfrm_address_t *daddr,
42 const xfrm_address_t *saddr,
c1969f29 43 u32 reqid,
a624c108 44 unsigned short family)
f034b5d4 45{
64d0cd00 46 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 47}
48
64d0cd00 49static inline unsigned int xfrm_src_hash(struct net *net,
2ab38503
DM		 50 const xfrm_address_t *daddr,
51 const xfrm_address_t *saddr,
44e36b42 52 unsigned short family)
f034b5d4 53{
64d0cd00 54 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 55}
56
f034b5d4 57static inline unsigned int
2ab38503
DM		 58xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
59 __be32 spi, u8 proto, unsigned short family)
f034b5d4 60{
64d0cd00 61 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 62}
63
f034b5d4
DM		 64static void xfrm_hash_transfer(struct hlist_head *list,
65 struct hlist_head *ndsttable,
66 struct hlist_head *nsrctable,
67 struct hlist_head *nspitable,
68 unsigned int nhashmask)
69{
b67bfe0d 70 struct hlist_node *tmp;
f034b5d4
DM		 71 struct xfrm_state *x;
72
b67bfe0d 73 hlist_for_each_entry_safe(x, tmp, list, bydst) {
f034b5d4
DM		 74 unsigned int h;
75
c1969f29
DM		 76 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
77 x->props.reqid, x->props.family,
78 nhashmask);
f034b5d4
DM		 79 hlist_add_head(&x->bydst, ndsttable+h);
80
667bbcb6
MN		 81 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
82 x->props.family,
f034b5d4
DM		 83 nhashmask);
84 hlist_add_head(&x->bysrc, nsrctable+h);
85
7b4dc360
MN		 86 if (x->id.spi) {
87 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
88 x->id.proto, x->props.family,
89 nhashmask);
90 hlist_add_head(&x->byspi, nspitable+h);
91 }
f034b5d4
DM		 92 }
93}
94
63082733 95static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 96{
63082733 97 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 98}
99
100static DEFINE_MUTEX(hash_resize_mutex);
101
63082733 102static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 103{
63082733 104 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
f034b5d4
DM		 105 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
106 unsigned long nsize, osize;
107 unsigned int nhashmask, ohashmask;
108 int i;
109
110 mutex_lock(&hash_resize_mutex);
111
63082733 112 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 113 ndst = xfrm_hash_alloc(nsize);
f034b5d4
DM		 114 if (!ndst)
115 goto out_unlock;
44e36b42 116 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 117 if (!nsrc) {
44e36b42 118 xfrm_hash_free(ndst, nsize);
f034b5d4
DM		 119 goto out_unlock;
120 }
44e36b42 121 nspi = xfrm_hash_alloc(nsize);
f034b5d4 122 if (!nspi) {
44e36b42
DM		 123 xfrm_hash_free(ndst, nsize);
124 xfrm_hash_free(nsrc, nsize);
f034b5d4
DM		 125 goto out_unlock;
126 }
127
283bc9f3 128 spin_lock_bh(&net->xfrm.xfrm_state_lock);
f034b5d4
DM		 129
130 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
63082733
AD		 131 for (i = net->xfrm.state_hmask; i >= 0; i--)
132 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
f034b5d4
DM		 133 nhashmask);
134
63082733
AD		 135 odst = net->xfrm.state_bydst;
136 osrc = net->xfrm.state_bysrc;
137 ospi = net->xfrm.state_byspi;
138 ohashmask = net->xfrm.state_hmask;
f034b5d4 139
63082733
AD		 140 net->xfrm.state_bydst = ndst;
141 net->xfrm.state_bysrc = nsrc;
142 net->xfrm.state_byspi = nspi;
143 net->xfrm.state_hmask = nhashmask;
f034b5d4 144
283bc9f3 145 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
f034b5d4
DM		 146
147 osize = (ohashmask + 1) * sizeof(struct hlist_head);
44e36b42
DM		 148 xfrm_hash_free(odst, osize);
149 xfrm_hash_free(osrc, osize);
150 xfrm_hash_free(ospi, osize);
f034b5d4
DM		 151
152out_unlock:
153 mutex_unlock(&hash_resize_mutex);
154}
155
44abdc30
CW		 156static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
157static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
1da177e4 158
1da177e4
LT		 159static DEFINE_SPINLOCK(xfrm_state_gc_lock);
160
53bc6b4d 161int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 162
980ebd25 163int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
15e47304 164void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
1da177e4 165
7a9885b9 166static DEFINE_SPINLOCK(xfrm_type_lock);
533cb5b0 167int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 168{
7a9885b9 169 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
533cb5b0 170 const struct xfrm_type **typemap;
aa5d62cc
HX		 171 int err = 0;
172
173 if (unlikely(afinfo == NULL))
174 return -EAFNOSUPPORT;
175 typemap = afinfo->type_map;
7a9885b9 176 spin_lock_bh(&xfrm_type_lock);
aa5d62cc
HX		 177
178 if (likely(typemap[type->proto] == NULL))
179 typemap[type->proto] = type;
180 else
181 err = -EEXIST;
7a9885b9
CW		 182 spin_unlock_bh(&xfrm_type_lock);
183 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 184 return err;
185}
186EXPORT_SYMBOL(xfrm_register_type);
187
533cb5b0 188int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 189{
7a9885b9 190 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
533cb5b0 191 const struct xfrm_type **typemap;
aa5d62cc
HX		 192 int err = 0;
193
194 if (unlikely(afinfo == NULL))
195 return -EAFNOSUPPORT;
196 typemap = afinfo->type_map;
7a9885b9 197 spin_lock_bh(&xfrm_type_lock);
aa5d62cc
HX		 198
199 if (unlikely(typemap[type->proto] != type))
200 err = -ENOENT;
201 else
202 typemap[type->proto] = NULL;
7a9885b9
CW		 203 spin_unlock_bh(&xfrm_type_lock);
204 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 205 return err;
206}
207EXPORT_SYMBOL(xfrm_unregister_type);
208
533cb5b0 209static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 210{
211 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 212 const struct xfrm_type **typemap;
213 const struct xfrm_type *type;
aa5d62cc
HX		 214 int modload_attempted = 0;
215
216retry:
217 afinfo = xfrm_state_get_afinfo(family);
218 if (unlikely(afinfo == NULL))
219 return NULL;
220 typemap = afinfo->type_map;
221
222 type = typemap[proto];
223 if (unlikely(type && !try_module_get(type->owner)))
224 type = NULL;
225 if (!type && !modload_attempted) {
226 xfrm_state_put_afinfo(afinfo);
227 request_module("xfrm-type-%d-%d", family, proto);
228 modload_attempted = 1;
229 goto retry;
230 }
231
232 xfrm_state_put_afinfo(afinfo);
233 return type;
234}
235
533cb5b0 236static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 237{
238 module_put(type->owner);
239}
240
7a9885b9 241static DEFINE_SPINLOCK(xfrm_mode_lock);
aa5d62cc
HX		 242int xfrm_register_mode(struct xfrm_mode *mode, int family)
243{
244 struct xfrm_state_afinfo *afinfo;
245 struct xfrm_mode **modemap;
246 int err;
247
248 if (unlikely(mode->encap >= XFRM_MODE_MAX))
249 return -EINVAL;
250
7a9885b9 251 afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 252 if (unlikely(afinfo == NULL))
253 return -EAFNOSUPPORT;
254
255 err = -EEXIST;
256 modemap = afinfo->mode_map;
7a9885b9 257 spin_lock_bh(&xfrm_mode_lock);
17c2a42a
HX		 258 if (modemap[mode->encap])
259 goto out;
aa5d62cc 260
17c2a42a
HX		 261 err = -ENOENT;
262 if (!try_module_get(afinfo->owner))
263 goto out;
264
265 mode->afinfo = afinfo;
266 modemap[mode->encap] = mode;
267 err = 0;
268
269out:
7a9885b9
CW		 270 spin_unlock_bh(&xfrm_mode_lock);
271 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 272 return err;
273}
274EXPORT_SYMBOL(xfrm_register_mode);
275
276int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
277{
278 struct xfrm_state_afinfo *afinfo;
279 struct xfrm_mode **modemap;
280 int err;
281
282 if (unlikely(mode->encap >= XFRM_MODE_MAX))
283 return -EINVAL;
284
7a9885b9 285 afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 286 if (unlikely(afinfo == NULL))
287 return -EAFNOSUPPORT;
288
289 err = -ENOENT;
290 modemap = afinfo->mode_map;
7a9885b9 291 spin_lock_bh(&xfrm_mode_lock);
aa5d62cc
HX		 292 if (likely(modemap[mode->encap] == mode)) {
293 modemap[mode->encap] = NULL;
17c2a42a 294 module_put(mode->afinfo->owner);
aa5d62cc
HX		 295 err = 0;
296 }
297
7a9885b9
CW		 298 spin_unlock_bh(&xfrm_mode_lock);
299 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 300 return err;
301}
302EXPORT_SYMBOL(xfrm_unregister_mode);
303
304static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
305{
306 struct xfrm_state_afinfo *afinfo;
307 struct xfrm_mode *mode;
308 int modload_attempted = 0;
309
310 if (unlikely(encap >= XFRM_MODE_MAX))
311 return NULL;
312
313retry:
314 afinfo = xfrm_state_get_afinfo(family);
315 if (unlikely(afinfo == NULL))
316 return NULL;
317
318 mode = afinfo->mode_map[encap];
319 if (unlikely(mode && !try_module_get(mode->owner)))
320 mode = NULL;
321 if (!mode && !modload_attempted) {
322 xfrm_state_put_afinfo(afinfo);
323 request_module("xfrm-mode-%d-%d", family, encap);
324 modload_attempted = 1;
325 goto retry;
326 }
327
328 xfrm_state_put_afinfo(afinfo);
329 return mode;
330}
331
332static void xfrm_put_mode(struct xfrm_mode *mode)
333{
334 module_put(mode->owner);
335}
336
1da177e4
LT		 337static void xfrm_state_gc_destroy(struct xfrm_state *x)
338{
9e0d57fd 339 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 340 del_timer_sync(&x->rtimer);
a51482bd
JJ		 341 kfree(x->aalg);
342 kfree(x->ealg);
343 kfree(x->calg);
344 kfree(x->encap);
060f02a3 345 kfree(x->coaddr);
d8647b79
SK		 346 kfree(x->replay_esn);
347 kfree(x->preplay_esn);
13996378
HX		 348 if (x->inner_mode)
349 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 350 if (x->inner_mode_iaf)
351 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 352 if (x->outer_mode)
353 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 354 if (x->type) {
355 x->type->destructor(x);
356 xfrm_put_type(x->type);
357 }
df71837d 358 security_xfrm_state_free(x);
1da177e4
LT		 359 kfree(x);
360}
361
c7837144 362static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 363{
c7837144 364 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7 365 struct xfrm_state *x;
b67bfe0d 366 struct hlist_node *tmp;
12a169e7 367 struct hlist_head gc_list;
1da177e4 368
1da177e4 369 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 370 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 371 spin_unlock_bh(&xfrm_state_gc_lock);
372
b67bfe0d 373 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
1da177e4 374 xfrm_state_gc_destroy(x);
1da177e4
LT		 375}
376
377static inline unsigned long make_jiffies(long secs)
378{
379 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
380 return MAX_SCHEDULE_TIMEOUT-1;
381 else
a716c119 382 return secs*HZ;
1da177e4
LT		 383}
384
9e0d57fd 385static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
1da177e4 386{
9e0d57fd
YP		 387 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
388 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
9d729f72 389 unsigned long now = get_seconds();
1da177e4
LT		 390 long next = LONG_MAX;
391 int warn = 0;
161a09e7 392 int err = 0;
1da177e4
LT		 393
394 spin_lock(&x->lock);
395 if (x->km.state == XFRM_STATE_DEAD)
396 goto out;
397 if (x->km.state == XFRM_STATE_EXPIRED)
398 goto expired;
399 if (x->lft.hard_add_expires_seconds) {
400 long tmo = x->lft.hard_add_expires_seconds +
401 x->curlft.add_time - now;
e3c0d047
FD		 402 if (tmo <= 0) {
403 if (x->xflags & XFRM_SOFT_EXPIRE) {
404 /* enter hard expire without soft expire first?!
405 * setting a new date could trigger this.
406 * workarbound: fix x->curflt.add_time by below:
407 */
408 x->curlft.add_time = now - x->saved_tmo - 1;
409 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
410 } else
411 goto expired;
412 }
1da177e4
LT		 413 if (tmo < next)
414 next = tmo;
415 }
416 if (x->lft.hard_use_expires_seconds) {
417 long tmo = x->lft.hard_use_expires_seconds +
418 (x->curlft.use_time ? : now) - now;
419 if (tmo <= 0)
420 goto expired;
421 if (tmo < next)
422 next = tmo;
423 }
424 if (x->km.dying)
425 goto resched;
426 if (x->lft.soft_add_expires_seconds) {
427 long tmo = x->lft.soft_add_expires_seconds +
428 x->curlft.add_time - now;
e3c0d047 429 if (tmo <= 0) {
1da177e4 430 warn = 1;
e3c0d047
FD		 431 x->xflags &= ~XFRM_SOFT_EXPIRE;
432 } else if (tmo < next) {
1da177e4 433 next = tmo;
e3c0d047
FD		 434 x->xflags |= XFRM_SOFT_EXPIRE;
435 x->saved_tmo = tmo;
436 }
1da177e4
LT		 437 }
438 if (x->lft.soft_use_expires_seconds) {
439 long tmo = x->lft.soft_use_expires_seconds +
440 (x->curlft.use_time ? : now) - now;
441 if (tmo <= 0)
442 warn = 1;
443 else if (tmo < next)
444 next = tmo;
445 }
446
4666faab 447 x->km.dying = warn;
1da177e4 448 if (warn)
53bc6b4d 449 km_state_expired(x, 0, 0);
1da177e4 450resched:
9e0d57fd
YP		 451 if (next != LONG_MAX){
452 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
453 }
a47f0ce0 454
1da177e4
LT		 455 goto out;
456
457expired:
5b8ef341 458 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
1da177e4 459 x->km.state = XFRM_STATE_EXPIRED;
161a09e7
JL		 460
461 err = __xfrm_state_delete(x);
0806ae4c 462 if (!err)
53bc6b4d 463 km_state_expired(x, 1, 0);
1da177e4 464
ab5f5e8b 465 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 466 audit_get_loginuid(current),
467 audit_get_sessionid(current), 0);
161a09e7 468
1da177e4
LT		 469out:
470 spin_unlock(&x->lock);
9e0d57fd 471 return HRTIMER_NORESTART;
1da177e4
LT		 472}
473
0ac84752
DM		 474static void xfrm_replay_timer_handler(unsigned long data);
475
673c09be 476struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 477{
478 struct xfrm_state *x;
479
0da974f4 480 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 481
482 if (x) {
673c09be 483 write_pnet(&x->xs_net, net);
1da177e4
LT		 484 atomic_set(&x->refcnt, 1);
485 atomic_set(&x->tunnel_users, 0);
12a169e7 486 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 487 INIT_HLIST_NODE(&x->bydst);
488 INIT_HLIST_NODE(&x->bysrc);
489 INIT_HLIST_NODE(&x->byspi);
99565a6c
FD		 490 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
491 CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 492 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
493 (unsigned long)x);
9d729f72 494 x->curlft.add_time = get_seconds();
1da177e4
LT		 495 x->lft.soft_byte_limit = XFRM_INF;
496 x->lft.soft_packet_limit = XFRM_INF;
497 x->lft.hard_byte_limit = XFRM_INF;
498 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 499 x->replay_maxage = 0;
500 x->replay_maxdiff = 0;
df9dcb45
KM		 501 x->inner_mode = NULL;
502 x->inner_mode_iaf = NULL;
1da177e4
LT		 503 spin_lock_init(&x->lock);
504 }
505 return x;
506}
507EXPORT_SYMBOL(xfrm_state_alloc);
508
509void __xfrm_state_destroy(struct xfrm_state *x)
510{
98806f75
AD		 511 struct net *net = xs_net(x);
512
547b792c 513 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 514
515 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 516 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 517 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 518 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 519}
520EXPORT_SYMBOL(__xfrm_state_destroy);
521
53bc6b4d 522int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 523{
98806f75 524 struct net *net = xs_net(x);
26b15dad
JHS		 525 int err = -ESRCH;
526
1da177e4
LT		 527 if (x->km.state != XFRM_STATE_DEAD) {
528 x->km.state = XFRM_STATE_DEAD;
283bc9f3 529 spin_lock(&net->xfrm.xfrm_state_lock);
12a169e7 530 list_del(&x->km.all);
8f126e37 531 hlist_del(&x->bydst);
8f126e37 532 hlist_del(&x->bysrc);
a47f0ce0 533 if (x->id.spi)
8f126e37 534 hlist_del(&x->byspi);
98806f75 535 net->xfrm.state_num--;
283bc9f3 536 spin_unlock(&net->xfrm.xfrm_state_lock);
1da177e4 537
1da177e4
LT		 538 /* All xfrm_state objects are created by xfrm_state_alloc.
539 * The xfrm_state_alloc call gives a reference, and that
540 * is what we are dropping here.
541 */
5dba4797 542 xfrm_state_put(x);
26b15dad 543 err = 0;
1da177e4 544 }
26b15dad
JHS		 545
546 return err;
1da177e4 547}
53bc6b4d 548EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 549
26b15dad 550int xfrm_state_delete(struct xfrm_state *x)
1da177e4 551{
26b15dad
JHS		 552 int err;
553
1da177e4 554 spin_lock_bh(&x->lock);
26b15dad 555 err = __xfrm_state_delete(x);
1da177e4 556 spin_unlock_bh(&x->lock);
26b15dad
JHS		 557
558 return err;
1da177e4
LT		 559}
560EXPORT_SYMBOL(xfrm_state_delete);
561
4aa2e62c
JL		 562#ifdef CONFIG_SECURITY_NETWORK_XFRM
563static inline int
0e602451 564xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
1da177e4 565{
4aa2e62c
JL		 566 int i, err = 0;
567
0e602451 568 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 569 struct xfrm_state *x;
570
b67bfe0d 571 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 572 if (xfrm_id_proto_match(x->id.proto, proto) &&
573 (err = security_xfrm_state_delete(x)) != 0) {
ab5f5e8b
JL		 574 xfrm_audit_state_delete(x, 0,
575 audit_info->loginuid,
2532386f 576 audit_info->sessionid,
ab5f5e8b 577 audit_info->secid);
4aa2e62c
JL		 578 return err;
579 }
580 }
581 }
582
583 return err;
584}
585#else
586static inline int
0e602451 587xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c
JL		 588{
589 return 0;
590}
591#endif
592
0e602451 593int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
4aa2e62c 594{
9e64cc95 595 int i, err = 0, cnt = 0;
1da177e4 596
283bc9f3 597 spin_lock_bh(&net->xfrm.xfrm_state_lock);
0e602451 598 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
4aa2e62c
JL		 599 if (err)
600 goto out;
601
9e64cc95 602 err = -ESRCH;
0e602451 603 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37 604 struct xfrm_state *x;
1da177e4 605restart:
b67bfe0d 606 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1da177e4 607 if (!xfrm_state_kern(x) &&
5794708f 608 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4 609 xfrm_state_hold(x);
283bc9f3 610 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 611
161a09e7 612 err = xfrm_state_delete(x);
ab5f5e8b
JL		 613 xfrm_audit_state_delete(x, err ? 0 : 1,
614 audit_info->loginuid,
2532386f 615 audit_info->sessionid,
ab5f5e8b 616 audit_info->secid);
1da177e4 617 xfrm_state_put(x);
9e64cc95
JHS		 618 if (!err)
619 cnt++;
1da177e4 620
283bc9f3 621 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 622 goto restart;
623 }
624 }
625 }
9e64cc95
JHS		 626 if (cnt)
627 err = 0;
4aa2e62c
JL		 628
629out:
283bc9f3 630 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
4aa2e62c 631 return err;
1da177e4
LT		 632}
633EXPORT_SYMBOL(xfrm_state_flush);
634
e071041b 635void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b 636{
283bc9f3 637 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e071041b
AD		 638 si->sadcnt = net->xfrm.state_num;
639 si->sadhcnt = net->xfrm.state_hmask;
28d8909b 640 si->sadhmcnt = xfrm_state_hashmax;
283bc9f3 641 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
28d8909b
JHS		 642}
643EXPORT_SYMBOL(xfrm_sad_getinfo);
644
1da177e4 645static int
1a898592 646xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
04686013 647 const struct xfrm_tmpl *tmpl,
33765d06 648 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
8444cf71 649 unsigned short family)
1da177e4
LT		 650{
651 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
652 if (!afinfo)
653 return -1;
8444cf71
TE		 654 afinfo->init_tempsel(&x->sel, fl);
655
656 if (family != tmpl->encap_family) {
657 xfrm_state_put_afinfo(afinfo);
658 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
659 if (!afinfo)
660 return -1;
661 }
662 afinfo->init_temprop(x, tmpl, daddr, saddr);
1da177e4
LT		 663 xfrm_state_put_afinfo(afinfo);
664 return 0;
665}
666
9aa60088
DM		 667static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
668 const xfrm_address_t *daddr,
669 __be32 spi, u8 proto,
670 unsigned short family)
edcd5821 671{
221df1ed 672 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821
DM		 673 struct xfrm_state *x;
674
b67bfe0d 675 hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 676 if (x->props.family != family ||
677 x->id.spi != spi ||
1802571b 678 x->id.proto != proto ||
70e94e66 679 !xfrm_addr_equal(&x->id.daddr, daddr, family))
edcd5821
DM		 680 continue;
681
3d6acfa7
JHS		 682 if ((mark & x->mark.m) != x->mark.v)
683 continue;
edcd5821
DM		 684 xfrm_state_hold(x);
685 return x;
686 }
687
688 return NULL;
689}
690
9aa60088
DM		 691static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
692 const xfrm_address_t *daddr,
693 const xfrm_address_t *saddr,
694 u8 proto, unsigned short family)
edcd5821 695{
221df1ed 696 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821
DM		 697 struct xfrm_state *x;
698
b67bfe0d 699 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 700 if (x->props.family != family ||
1802571b 701 x->id.proto != proto ||
70e94e66
YH		 702 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
703 !xfrm_addr_equal(&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 739static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
4a08ab0f 740 const struct flowi *fl, unsigned short family,
08ec9af1
DM		 741 struct xfrm_state **best, int *acq_in_progress,
742 int *error)
743{
744 /* Resolution logic:
745 * 1. There is a valid state with matching selector. Done.
746 * 2. Valid state with inappropriate selector. Skip.
747 *
748 * Entering area of "sysdeps".
749 *
750 * 3. If state is not valid, selector is temporary, it selects
751 * only session which triggered previous resolution. Key
752 * manager will do something to install a state with proper
753 * selector.
754 */
755 if (x->km.state == XFRM_STATE_VALID) {
756 if ((x->sel.family &&
757 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
758 !security_xfrm_state_pol_flow_match(x, pol, fl))
759 return;
760
761 if (!*best ||
762 (*best)->km.dying > x->km.dying ||
763 ((*best)->km.dying == x->km.dying &&
764 (*best)->curlft.add_time < x->curlft.add_time))
765 *best = x;
766 } else if (x->km.state == XFRM_STATE_ACQ) {
767 *acq_in_progress = 1;
768 } else if (x->km.state == XFRM_STATE_ERROR ||
769 x->km.state == XFRM_STATE_EXPIRED) {
770 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
771 security_xfrm_state_pol_flow_match(x, pol, fl))
772 *error = -ESRCH;
773 }
774}
775
1da177e4 776struct xfrm_state *
33765d06 777xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
b520e9f6 778 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1da177e4
LT		 779 struct xfrm_policy *pol, int *err,
780 unsigned short family)
781{
08ec9af1 782 static xfrm_address_t saddr_wildcard = { };
5447c5e4 783 struct net *net = xp_net(pol);
6a783c90 784 unsigned int h, h_wildcard;
37b08e34 785 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 786 int acquire_in_progress = 0;
787 int error = 0;
788 struct xfrm_state *best = NULL;
bd55775c 789 u32 mark = pol->mark.v & pol->mark.m;
8444cf71 790 unsigned short encap_family = tmpl->encap_family;
a716c119 791
37b08e34
DM		 792 to_put = NULL;
793
283bc9f3 794 spin_lock_bh(&net->xfrm.xfrm_state_lock);
8444cf71 795 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
b67bfe0d 796 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
8444cf71 797 if (x->props.family == encap_family &&
1da177e4 798 x->props.reqid == tmpl->reqid &&
3d6acfa7 799 (mark & x->mark.m) == x->mark.v &&
fbd9a5b4 800 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 801 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1da177e4
LT		 802 tmpl->mode == x->props.mode &&
803 tmpl->id.proto == x->id.proto &&
08ec9af1 804 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 805 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1
DM		 806 &best, &acquire_in_progress, &error);
807 }
6f115638 808 if (best || acquire_in_progress)
08ec9af1
DM		 809 goto found;
810
8444cf71 811 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
b67bfe0d 812 hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) {
8444cf71 813 if (x->props.family == encap_family &&
08ec9af1 814 x->props.reqid == tmpl->reqid &&
3d6acfa7 815 (mark & x->mark.m) == x->mark.v &&
08ec9af1 816 !(x->props.flags & XFRM_STATE_WILDRECV) &&
f59bbdfa 817 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
08ec9af1
DM		 818 tmpl->mode == x->props.mode &&
819 tmpl->id.proto == x->id.proto &&
820 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 821 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1 822 &best, &acquire_in_progress, &error);
1da177e4
LT		 823 }
824
08ec9af1 825found:
1da177e4
LT		 826 x = best;
827 if (!x && !error && !acquire_in_progress) {
5c5d281a 828 if (tmpl->id.spi &&
bd55775c 829 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
8444cf71 830 tmpl->id.proto, encap_family)) != NULL) {
37b08e34 831 to_put = x0;
1da177e4
LT		 832 error = -EEXIST;
833 goto out;
834 }
5447c5e4 835 x = xfrm_state_alloc(net);
1da177e4
LT		 836 if (x == NULL) {
837 error = -ENOMEM;
838 goto out;
839 }
8444cf71 840 /* Initialize temporary state matching only
1da177e4 841 * to current session. */
8444cf71 842 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
bd55775c 843 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1da177e4 844
1d28f42c 845 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
e0d1caa7
VY		 846 if (error) {
847 x->km.state = XFRM_STATE_DEAD;
37b08e34 848 to_put = x;
e0d1caa7
VY		 849 x = NULL;
850 goto out;
851 }
852
1da177e4
LT		 853 if (km_query(x, tmpl, pol) == 0) {
854 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 855 list_add(&x->km.all, &net->xfrm.state_all);
856 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
8444cf71 857 h = xfrm_src_hash(net, daddr, saddr, encap_family);
5447c5e4 858 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 859 if (x->id.spi) {
8444cf71 860 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
5447c5e4 861 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 862 }
b27aeadb 863 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 864 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 865 net->xfrm.state_num++;
866 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 867 } else {
868 x->km.state = XFRM_STATE_DEAD;
37b08e34 869 to_put = x;
1da177e4
LT		 870 x = NULL;
871 error = -ESRCH;
872 }
873 }
874out:
875 if (x)
876 xfrm_state_hold(x);
877 else
878 *err = acquire_in_progress ? -EAGAIN : error;
283bc9f3 879 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
37b08e34
DM		 880 if (to_put)
881 xfrm_state_put(to_put);
1da177e4
LT		 882 return x;
883}
884
628529b6 885struct xfrm_state *
bd55775c 886xfrm_stateonly_find(struct net *net, u32 mark,
5447c5e4 887 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 888 unsigned short family, u8 mode, u8 proto, u32 reqid)
889{
4bda4f25 890 unsigned int h;
628529b6 891 struct xfrm_state *rx = NULL, *x = NULL;
628529b6 892
283bc9f3 893 spin_lock(&net->xfrm.xfrm_state_lock);
5447c5e4 894 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
b67bfe0d 895 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 896 if (x->props.family == family &&
897 x->props.reqid == reqid &&
3d6acfa7 898 (mark & x->mark.m) == x->mark.v &&
628529b6
JHS		 899 !(x->props.flags & XFRM_STATE_WILDRECV) &&
900 xfrm_state_addr_check(x, daddr, saddr, family) &&
901 mode == x->props.mode &&
902 proto == x->id.proto &&
903 x->km.state == XFRM_STATE_VALID) {
904 rx = x;
905 break;
906 }
907 }
908
909 if (rx)
910 xfrm_state_hold(rx);
283bc9f3 911 spin_unlock(&net->xfrm.xfrm_state_lock);
628529b6
JHS		 912
913
914 return rx;
915}
916EXPORT_SYMBOL(xfrm_stateonly_find);
917
1da177e4
LT		 918static void __xfrm_state_insert(struct xfrm_state *x)
919{
98806f75 920 struct net *net = xs_net(x);
a624c108 921 unsigned int h;
1da177e4 922
98806f75 923 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 924
98806f75 925 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 926 x->props.reqid, x->props.family);
98806f75 927 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 928
98806f75
AD		 929 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
930 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 931
7b4dc360 932 if (x->id.spi) {
98806f75 933 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 934 x->props.family);
935
98806f75 936 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 937 }
938
9e0d57fd 939 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 940 if (x->replay_maxage)
941 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 942
98806f75 943 net->xfrm.state_num++;
f034b5d4 944
98806f75 945 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 946}
947
283bc9f3 948/* net->xfrm.xfrm_state_lock is held */
c7f5ea3a
DM		 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;
c7f5ea3a 955 unsigned int h;
3d6acfa7 956 u32 mark = xnew->mark.v & xnew->mark.m;
c7f5ea3a 957
98806f75 958 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
b67bfe0d 959 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 960 if (x->props.family == family &&
961 x->props.reqid == reqid &&
3d6acfa7 962 (mark & x->mark.m) == x->mark.v &&
70e94e66
YH		 963 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
964 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 965 x->genid++;
c7f5ea3a
DM		 966 }
967}
968
1da177e4
LT		 969void xfrm_state_insert(struct xfrm_state *x)
970{
283bc9f3
FD		 971 struct net *net = xs_net(x);
972
973 spin_lock_bh(&net->xfrm.xfrm_state_lock);
c7f5ea3a 974 __xfrm_state_bump_genids(x);
1da177e4 975 __xfrm_state_insert(x);
283bc9f3 976 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 977}
978EXPORT_SYMBOL(xfrm_state_insert);
979
283bc9f3 980/* net->xfrm.xfrm_state_lock is held */
e473fcb4
MK		 981static struct xfrm_state *__find_acq_core(struct net *net,
982 const struct xfrm_mark *m,
a70486f0
DM		 983 unsigned short family, u8 mode,
984 u32 reqid, u8 proto,
985 const xfrm_address_t *daddr,
e473fcb4
MK		 986 const xfrm_address_t *saddr,
987 int create)
2770834c 988{
5447c5e4 989 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
2770834c 990 struct xfrm_state *x;
3d6acfa7 991 u32 mark = m->v & m->m;
2770834c 992
b67bfe0d 993 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 994 if (x->props.reqid != reqid ||
995 x->props.mode != mode ||
996 x->props.family != family ||
997 x->km.state != XFRM_STATE_ACQ ||
75e252d9 998 x->id.spi != 0 ||
1802571b 999 x->id.proto != proto ||
3d6acfa7 1000 (mark & x->mark.m) != x->mark.v ||
70e94e66
YH		 1001 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1002 !xfrm_addr_equal(&x->props.saddr, saddr, family))
2770834c
DM		 1003 continue;
1004
2770834c
DM		 1005 xfrm_state_hold(x);
1006 return x;
1007 }
1008
1009 if (!create)
1010 return NULL;
1011
5447c5e4 1012 x = xfrm_state_alloc(net);
2770834c
DM		 1013 if (likely(x)) {
1014 switch (family) {
1015 case AF_INET:
1016 x->sel.daddr.a4 = daddr->a4;
1017 x->sel.saddr.a4 = saddr->a4;
1018 x->sel.prefixlen_d = 32;
1019 x->sel.prefixlen_s = 32;
1020 x->props.saddr.a4 = saddr->a4;
1021 x->id.daddr.a4 = daddr->a4;
1022 break;
1023
1024 case AF_INET6:
4e3fd7a0
AD		 1025 *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
1026 *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
2770834c
DM		 1027 x->sel.prefixlen_d = 128;
1028 x->sel.prefixlen_s = 128;
4e3fd7a0
AD		 1029 *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
1030 *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
2770834c 1031 break;
3ff50b79 1032 }
2770834c
DM		 1033
1034 x->km.state = XFRM_STATE_ACQ;
1035 x->id.proto = proto;
1036 x->props.family = family;
1037 x->props.mode = mode;
1038 x->props.reqid = reqid;
bd55775c
JHS		 1039 x->mark.v = m->v;
1040 x->mark.m = m->m;
b27aeadb 1041 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1042 xfrm_state_hold(x);
9e0d57fd 1043 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1044 list_add(&x->km.all, &net->xfrm.state_all);
1045 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1046 h = xfrm_src_hash(net, daddr, saddr, family);
1047 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1048
5447c5e4 1049 net->xfrm.state_num++;
918049f0 1050
5447c5e4 1051 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1052 }
1053
1054 return x;
1055}
1056
bd55775c 1057static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1058
1059int xfrm_state_add(struct xfrm_state *x)
1060{
5447c5e4 1061 struct net *net = xs_net(x);
37b08e34 1062 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1063 int family;
1064 int err;
bd55775c 1065 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1066 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1067
1068 family = x->props.family;
1da177e4 1069
37b08e34
DM		 1070 to_put = NULL;
1071
283bc9f3 1072 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1073
edcd5821 1074 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1075 if (x1) {
37b08e34 1076 to_put = x1;
1da177e4
LT		 1077 x1 = NULL;
1078 err = -EEXIST;
1079 goto out;
1080 }
1081
eb2971b6 1082 if (use_spi && x->km.seq) {
bd55775c 1083 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9 1084 if (x1 && ((x1->id.proto != x->id.proto) ||
70e94e66 1085 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1086 to_put = x1;
1da177e4
LT		 1087 x1 = NULL;
1088 }
1089 }
1090
eb2971b6 1091 if (use_spi && !x1)
bd55775c
JHS		 1092 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1093 x->props.reqid, x->id.proto,
2770834c 1094 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1095
c7f5ea3a 1096 __xfrm_state_bump_genids(x);
1da177e4
LT		 1097 __xfrm_state_insert(x);
1098 err = 0;
1099
1100out:
283bc9f3 1101 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1102
1103 if (x1) {
1104 xfrm_state_delete(x1);
1105 xfrm_state_put(x1);
1106 }
1107
37b08e34
DM		 1108 if (to_put)
1109 xfrm_state_put(to_put);
1110
1da177e4
LT		 1111 return err;
1112}
1113EXPORT_SYMBOL(xfrm_state_add);
1114
80c9abaa 1115#ifdef CONFIG_XFRM_MIGRATE
6666351d 1116static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
80c9abaa 1117{
98806f75 1118 struct net *net = xs_net(orig);
80c9abaa 1119 int err = -ENOMEM;
98806f75 1120 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1121 if (!x)
553f9118 1122 goto out;
80c9abaa
SS		 1123
1124 memcpy(&x->id, &orig->id, sizeof(x->id));
1125 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1126 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1127 x->props.mode = orig->props.mode;
1128 x->props.replay_window = orig->props.replay_window;
1129 x->props.reqid = orig->props.reqid;
1130 x->props.family = orig->props.family;
1131 x->props.saddr = orig->props.saddr;
1132
1133 if (orig->aalg) {
4447bb33 1134 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1135 if (!x->aalg)
1136 goto error;
1137 }
1138 x->props.aalgo = orig->props.aalgo;
1139
1140 if (orig->ealg) {
1141 x->ealg = xfrm_algo_clone(orig->ealg);
1142 if (!x->ealg)
1143 goto error;
1144 }
1145 x->props.ealgo = orig->props.ealgo;
1146
1147 if (orig->calg) {
1148 x->calg = xfrm_algo_clone(orig->calg);
1149 if (!x->calg)
1150 goto error;
1151 }
1152 x->props.calgo = orig->props.calgo;
1153
a716c119 1154 if (orig->encap) {
80c9abaa
SS		 1155 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1156 if (!x->encap)
1157 goto error;
1158 }
1159
1160 if (orig->coaddr) {
1161 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1162 GFP_KERNEL);
1163 if (!x->coaddr)
1164 goto error;
1165 }
1166
af2f464e
SK		 1167 if (orig->replay_esn) {
1168 err = xfrm_replay_clone(x, orig);
1169 if (err)
1170 goto error;
1171 }
1172
bd55775c
JHS		 1173 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1174
80c9abaa
SS		 1175 err = xfrm_init_state(x);
1176 if (err)
1177 goto error;
1178
1179 x->props.flags = orig->props.flags;
a947b0a9 1180 x->props.extra_flags = orig->props.extra_flags;
80c9abaa
SS		 1181
1182 x->curlft.add_time = orig->curlft.add_time;
1183 x->km.state = orig->km.state;
1184 x->km.seq = orig->km.seq;
1185
1186 return x;
1187
1188 error:
553f9118
HX		 1189 xfrm_state_put(x);
1190out:
80c9abaa
SS		 1191 if (errp)
1192 *errp = err;
80c9abaa
SS		 1193 return NULL;
1194}
80c9abaa 1195
283bc9f3
FD		 1196/* net->xfrm.xfrm_state_lock is held */
1197struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
80c9abaa
SS		 1198{
1199 unsigned int h;
1200 struct xfrm_state *x;
80c9abaa
SS		 1201
1202 if (m->reqid) {
283bc9f3 1203 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1204 m->reqid, m->old_family);
283bc9f3 1205 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1206 if (x->props.mode != m->mode ||
1207 x->id.proto != m->proto)
1208 continue;
1209 if (m->reqid && x->props.reqid != m->reqid)
1210 continue;
70e94e66
YH		 1211 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1212 m->old_family) ||
1213 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1214 m->old_family))
80c9abaa
SS		 1215 continue;
1216 xfrm_state_hold(x);
1217 return x;
1218 }
1219 } else {
283bc9f3 1220 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1221 m->old_family);
283bc9f3 1222 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1223 if (x->props.mode != m->mode ||
1224 x->id.proto != m->proto)
1225 continue;
70e94e66
YH		 1226 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1227 m->old_family) ||
1228 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1229 m->old_family))
80c9abaa
SS		 1230 continue;
1231 xfrm_state_hold(x);
1232 return x;
1233 }
1234 }
1235
a716c119 1236 return NULL;
80c9abaa
SS		 1237}
1238EXPORT_SYMBOL(xfrm_migrate_state_find);
1239
1240struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1241 struct xfrm_migrate *m)
1242{
1243 struct xfrm_state *xc;
1244 int err;
1245
1246 xc = xfrm_state_clone(x, &err);
1247 if (!xc)
1248 return NULL;
1249
1250 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1251 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1252
1253 /* add state */
70e94e66 1254 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
80c9abaa
SS		 1255 /* a care is needed when the destination address of the
1256 state is to be updated as it is a part of triplet */
1257 xfrm_state_insert(xc);
1258 } else {
1259 if ((err = xfrm_state_add(xc)) < 0)
1260 goto error;
1261 }
1262
1263 return xc;
1264error:
78347c8c 1265 xfrm_state_put(xc);
80c9abaa
SS		 1266 return NULL;
1267}
1268EXPORT_SYMBOL(xfrm_state_migrate);
1269#endif
1270
1da177e4
LT		 1271int xfrm_state_update(struct xfrm_state *x)
1272{
37b08e34 1273 struct xfrm_state *x1, *to_put;
1da177e4 1274 int err;
eb2971b6 1275 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
283bc9f3 1276 struct net *net = xs_net(x);
1da177e4 1277
37b08e34
DM		 1278 to_put = NULL;
1279
283bc9f3 1280 spin_lock_bh(&net->xfrm.xfrm_state_lock);
edcd5821 1281 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1282
1283 err = -ESRCH;
1284 if (!x1)
1285 goto out;
1286
1287 if (xfrm_state_kern(x1)) {
37b08e34 1288 to_put = x1;
1da177e4
LT		 1289 err = -EEXIST;
1290 goto out;
1291 }
1292
1293 if (x1->km.state == XFRM_STATE_ACQ) {
1294 __xfrm_state_insert(x);
1295 x = NULL;
1296 }
1297 err = 0;
1298
1299out:
283bc9f3 1300 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1301
37b08e34
DM		 1302 if (to_put)
1303 xfrm_state_put(to_put);
1304
1da177e4
LT		 1305 if (err)
1306 return err;
1307
1308 if (!x) {
1309 xfrm_state_delete(x1);
1310 xfrm_state_put(x1);
1311 return 0;
1312 }
1313
1314 err = -EINVAL;
1315 spin_lock_bh(&x1->lock);
1316 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1317 if (x->encap && x1->encap)
1318 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1319 if (x->coaddr && x1->coaddr) {
1320 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1321 }
1322 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1323 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1324 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1325 x1->km.dying = 0;
1326
9e0d57fd 1327 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1328 if (x1->curlft.use_time)
1329 xfrm_state_check_expire(x1);
1330
1331 err = 0;
8fcbc637
TG		 1332 x->km.state = XFRM_STATE_DEAD;
1333 __xfrm_state_put(x);
1da177e4
LT		 1334 }
1335 spin_unlock_bh(&x1->lock);
1336
1337 xfrm_state_put(x1);
1338
1339 return err;
1340}
1341EXPORT_SYMBOL(xfrm_state_update);
1342
1343int xfrm_state_check_expire(struct xfrm_state *x)
1344{
1345 if (!x->curlft.use_time)
9d729f72 1346 x->curlft.use_time = get_seconds();
1da177e4 1347
1da177e4
LT		 1348 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1349 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1350 x->km.state = XFRM_STATE_EXPIRED;
9e0d57fd 1351 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
1da177e4
LT		 1352 return -EINVAL;
1353 }
1354
1355 if (!x->km.dying &&
1356 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1357 x->curlft.packets >= x->lft.soft_packet_limit)) {
1358 x->km.dying = 1;
53bc6b4d 1359 km_state_expired(x, 0, 0);
4666faab 1360 }
1da177e4
LT		 1361 return 0;
1362}
1363EXPORT_SYMBOL(xfrm_state_check_expire);
1364
1da177e4 1365struct xfrm_state *
a70486f0 1366xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
bd55775c 1367 u8 proto, unsigned short family)
1da177e4
LT		 1368{
1369 struct xfrm_state *x;
1da177e4 1370
283bc9f3 1371 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1372 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
283bc9f3 1373 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1374 return x;
1375}
1376EXPORT_SYMBOL(xfrm_state_lookup);
1377
1378struct xfrm_state *
bd55775c 1379xfrm_state_lookup_byaddr(struct net *net, u32 mark,
a70486f0 1380 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
eb2971b6
MN		 1381 u8 proto, unsigned short family)
1382{
1383 struct xfrm_state *x;
eb2971b6 1384
283bc9f3 1385 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1386 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
283bc9f3 1387 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
eb2971b6
MN		 1388 return x;
1389}
1390EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1391
1392struct xfrm_state *
e473fcb4
MK		 1393xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1394 u8 proto, const xfrm_address_t *daddr,
1395 const xfrm_address_t *saddr, int create, unsigned short family)
1da177e4
LT		 1396{
1397 struct xfrm_state *x;
1da177e4 1398
283bc9f3 1399 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1400 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
283bc9f3 1401 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2770834c 1402
1da177e4
LT		 1403 return x;
1404}
1405EXPORT_SYMBOL(xfrm_find_acq);
1406
41a49cc3
MN		 1407#ifdef CONFIG_XFRM_SUB_POLICY
1408int
1409xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
283bc9f3 1410 unsigned short family, struct net *net)
41a49cc3
MN		 1411{
1412 int err = 0;
1413 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1414 if (!afinfo)
1415 return -EAFNOSUPPORT;
1416
283bc9f3 1417 spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/
41a49cc3
MN		 1418 if (afinfo->tmpl_sort)
1419 err = afinfo->tmpl_sort(dst, src, n);
283bc9f3 1420 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1421 xfrm_state_put_afinfo(afinfo);
1422 return err;
1423}
1424EXPORT_SYMBOL(xfrm_tmpl_sort);
1425
1426int
1427xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1428 unsigned short family)
1429{
1430 int err = 0;
1431 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
283bc9f3
FD		 1432 struct net *net = xs_net(*dst);
1433
41a49cc3
MN		 1434 if (!afinfo)
1435 return -EAFNOSUPPORT;
1436
283bc9f3 1437 spin_lock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1438 if (afinfo->state_sort)
1439 err = afinfo->state_sort(dst, src, n);
283bc9f3 1440 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1441 xfrm_state_put_afinfo(afinfo);
1442 return err;
1443}
1444EXPORT_SYMBOL(xfrm_state_sort);
1445#endif
1446
1da177e4
LT		 1447/* Silly enough, but I'm lazy to build resolution list */
1448
bd55775c 1449static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1450{
1451 int i;
1da177e4 1452
5447c5e4 1453 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1454 struct xfrm_state *x;
1455
b67bfe0d 1456 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
8f126e37 1457 if (x->km.seq == seq &&
3d6acfa7 1458 (mark & x->mark.m) == x->mark.v &&
8f126e37 1459 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1460 xfrm_state_hold(x);
1461 return x;
1462 }
1463 }
1464 }
1465 return NULL;
1466}
1467
bd55775c 1468struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1469{
1470 struct xfrm_state *x;
1471
283bc9f3 1472 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1473 x = __xfrm_find_acq_byseq(net, mark, seq);
283bc9f3 1474 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1475 return x;
1476}
1477EXPORT_SYMBOL(xfrm_find_acq_byseq);
1478
1479u32 xfrm_get_acqseq(void)
1480{
1481 u32 res;
6836b9bd 1482 static atomic_t acqseq;
1483
1484 do {
1485 res = atomic_inc_return(&acqseq);
1486 } while (!res);
1da177e4 1487
1da177e4
LT		 1488 return res;
1489}
1490EXPORT_SYMBOL(xfrm_get_acqseq);
1491
776e9dd9
FD		 1492int verify_spi_info(u8 proto, u32 min, u32 max)
1493{
1494 switch (proto) {
1495 case IPPROTO_AH:
1496 case IPPROTO_ESP:
1497 break;
1498
1499 case IPPROTO_COMP:
1500 /* IPCOMP spi is 16-bits. */
1501 if (max >= 0x10000)
1502 return -EINVAL;
1503 break;
1504
1505 default:
1506 return -EINVAL;
1507 }
1508
1509 if (min > max)
1510 return -EINVAL;
1511
1512 return 0;
1513}
1514EXPORT_SYMBOL(verify_spi_info);
1515
658b219e 1516int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1517{
221df1ed 1518 struct net *net = xs_net(x);
f034b5d4 1519 unsigned int h;
1da177e4 1520 struct xfrm_state *x0;
658b219e
HX		 1521 int err = -ENOENT;
1522 __be32 minspi = htonl(low);
1523 __be32 maxspi = htonl(high);
bd55775c 1524 u32 mark = x->mark.v & x->mark.m;
1da177e4 1525
658b219e
HX		 1526 spin_lock_bh(&x->lock);
1527 if (x->km.state == XFRM_STATE_DEAD)
1528 goto unlock;
1529
1530 err = 0;
1da177e4 1531 if (x->id.spi)
658b219e
HX		 1532 goto unlock;
1533
1534 err = -ENOENT;
1da177e4
LT		 1535
1536 if (minspi == maxspi) {
bd55775c 1537 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1538 if (x0) {
1539 xfrm_state_put(x0);
658b219e 1540 goto unlock;
1da177e4
LT		 1541 }
1542 x->id.spi = minspi;
1543 } else {
1544 u32 spi = 0;
26977b4e
AV		 1545 for (h=0; h<high-low+1; h++) {
1546 spi = low + net_random()%(high-low+1);
bd55775c 1547 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1548 if (x0 == NULL) {
1549 x->id.spi = htonl(spi);
1550 break;
1551 }
1552 xfrm_state_put(x0);
1553 }
1554 }
1555 if (x->id.spi) {
283bc9f3 1556 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12604d8a
AD		 1557 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1558 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
283bc9f3 1559 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
658b219e
HX		 1560
1561 err = 0;
1da177e4 1562 }
658b219e
HX		 1563
1564unlock:
1565 spin_unlock_bh(&x->lock);
1566
1567 return err;
1da177e4
LT		 1568}
1569EXPORT_SYMBOL(xfrm_alloc_spi);
1570
284fa7da 1571int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1572 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1573 void *data)
1574{
12a169e7
HX		 1575 struct xfrm_state *state;
1576 struct xfrm_state_walk *x;
1da177e4
LT		 1577 int err = 0;
1578
12a169e7 1579 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1580 return 0;
1581
283bc9f3 1582 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 1583 if (list_empty(&walk->all))
284fa7da 1584 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1585 else
1586 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1587 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1588 if (x->state == XFRM_STATE_DEAD)
4c563f76 1589 continue;
12a169e7
HX		 1590 state = container_of(x, struct xfrm_state, km);
1591 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1592 continue;
12a169e7
HX		 1593 err = func(state, walk->seq, data);
1594 if (err) {
1595 list_move_tail(&walk->all, &x->all);
1596 goto out;
1da177e4 1597 }
12a169e7 1598 walk->seq++;
1da177e4 1599 }
12a169e7 1600 if (walk->seq == 0) {
1da177e4
LT		 1601 err = -ENOENT;
1602 goto out;
1603 }
12a169e7 1604 list_del_init(&walk->all);
1da177e4 1605out:
283bc9f3 1606 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1607 return err;
1608}
1609EXPORT_SYMBOL(xfrm_state_walk);
1610
5c182458
HX		 1611void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1612{
12a169e7 1613 INIT_LIST_HEAD(&walk->all);
5c182458 1614 walk->proto = proto;
12a169e7
HX		 1615 walk->state = XFRM_STATE_DEAD;
1616 walk->seq = 0;
5c182458
HX		 1617}
1618EXPORT_SYMBOL(xfrm_state_walk_init);
1619
283bc9f3 1620void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
abb81c4f 1621{
12a169e7 1622 if (list_empty(&walk->all))
5c182458 1623 return;
5c182458 1624
283bc9f3 1625 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 1626 list_del(&walk->all);
283bc9f3 1627 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
abb81c4f
HX		 1628}
1629EXPORT_SYMBOL(xfrm_state_walk_done);
1630
f8cd5488
JHS		 1631static void xfrm_replay_timer_handler(unsigned long data)
1632{
1633 struct xfrm_state *x = (struct xfrm_state*)data;
1634
1635 spin_lock(&x->lock);
1636
2717096a 1637 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1638 if (xfrm_aevent_is_on(xs_net(x)))
9fdc4883 1639 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
2717096a
JHS		 1640 else
1641 x->xflags |= XFRM_TIME_DEFER;
1642 }
f8cd5488
JHS		 1643
1644 spin_unlock(&x->lock);
1645}
1646
df01812e 1647static LIST_HEAD(xfrm_km_list);
1da177e4 1648
214e005b 1649void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4
LT		 1650{
1651 struct xfrm_mgr *km;
1652
85168c00
CW		 1653 rcu_read_lock();
1654 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 1655 if (km->notify_policy)
1656 km->notify_policy(xp, dir, c);
85168c00 1657 rcu_read_unlock();
26b15dad 1658}
1da177e4 1659
214e005b 1660void km_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1661{
1662 struct xfrm_mgr *km;
85168c00
CW		 1663 rcu_read_lock();
1664 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 1665 if (km->notify)
1666 km->notify(x, c);
85168c00 1667 rcu_read_unlock();
26b15dad
JHS		 1668}
1669
1670EXPORT_SYMBOL(km_policy_notify);
1671EXPORT_SYMBOL(km_state_notify);
1672
15e47304 1673void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
26b15dad
JHS		 1674{
1675 struct km_event c;
1676
bf08867f 1677 c.data.hard = hard;
15e47304 1678 c.portid = portid;
f60f6b8f 1679 c.event = XFRM_MSG_EXPIRE;
26b15dad 1680 km_state_notify(x, &c);
1da177e4
LT		 1681}
1682
53bc6b4d 1683EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1684/*
1685 * We send to all registered managers regardless of failure
1686 * We are happy with one success
1687*/
980ebd25 1688int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1689{
26b15dad 1690 int err = -EINVAL, acqret;
1da177e4
LT		 1691 struct xfrm_mgr *km;
1692
85168c00
CW		 1693 rcu_read_lock();
1694 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
65e0736b 1695 acqret = km->acquire(x, t, pol);
26b15dad
JHS		 1696 if (!acqret)
1697 err = acqret;
1da177e4 1698 }
85168c00 1699 rcu_read_unlock();
1da177e4
LT		 1700 return err;
1701}
980ebd25 1702EXPORT_SYMBOL(km_query);
1da177e4 1703
5d36b180 1704int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1705{
1706 int err = -EINVAL;
1707 struct xfrm_mgr *km;
1708
85168c00
CW		 1709 rcu_read_lock();
1710 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1da177e4
LT		 1711 if (km->new_mapping)
1712 err = km->new_mapping(x, ipaddr, sport);
1713 if (!err)
1714 break;
1715 }
85168c00 1716 rcu_read_unlock();
1da177e4
LT		 1717 return err;
1718}
1719EXPORT_SYMBOL(km_new_mapping);
1720
15e47304 1721void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1da177e4 1722{
26b15dad 1723 struct km_event c;
1da177e4 1724
bf08867f 1725 c.data.hard = hard;
15e47304 1726 c.portid = portid;
f60f6b8f 1727 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1728 km_policy_notify(pol, dir, &c);
1da177e4 1729}
a70fcb0b 1730EXPORT_SYMBOL(km_policy_expired);
1da177e4 1731
2d60abc2 1732#ifdef CONFIG_XFRM_MIGRATE
183cad12
DM		 1733int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1734 const struct xfrm_migrate *m, int num_migrate,
1735 const struct xfrm_kmaddress *k)
80c9abaa
SS		 1736{
1737 int err = -EINVAL;
1738 int ret;
1739 struct xfrm_mgr *km;
1740
85168c00
CW		 1741 rcu_read_lock();
1742 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
80c9abaa 1743 if (km->migrate) {
13c1d189 1744 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1745 if (!ret)
1746 err = ret;
1747 }
1748 }
85168c00 1749 rcu_read_unlock();
80c9abaa
SS		 1750 return err;
1751}
1752EXPORT_SYMBOL(km_migrate);
2d60abc2 1753#endif
80c9abaa 1754
db983c11 1755int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1756{
1757 int err = -EINVAL;
1758 int ret;
1759 struct xfrm_mgr *km;
1760
85168c00
CW		 1761 rcu_read_lock();
1762 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
97a64b45 1763 if (km->report) {
db983c11 1764 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1765 if (!ret)
1766 err = ret;
1767 }
1768 }
85168c00 1769 rcu_read_unlock();
97a64b45
MN		 1770 return err;
1771}
1772EXPORT_SYMBOL(km_report);
1773
1da177e4
LT		 1774int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1775{
1776 int err;
1777 u8 *data;
1778 struct xfrm_mgr *km;
1779 struct xfrm_policy *pol = NULL;
1780
1781 if (optlen <= 0 || optlen > PAGE_SIZE)
1782 return -EMSGSIZE;
1783
1784 data = kmalloc(optlen, GFP_KERNEL);
1785 if (!data)
1786 return -ENOMEM;
1787
1788 err = -EFAULT;
1789 if (copy_from_user(data, optval, optlen))
1790 goto out;
1791
1792 err = -EINVAL;
85168c00
CW		 1793 rcu_read_lock();
1794 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
cb969f07 1795 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1796 optlen, &err);
1797 if (err >= 0)
1798 break;
1799 }
85168c00 1800 rcu_read_unlock();
1da177e4
LT		 1801
1802 if (err >= 0) {
1803 xfrm_sk_policy_insert(sk, err, pol);
1804 xfrm_pol_put(pol);
1805 err = 0;
1806 }
1807
1808out:
1809 kfree(data);
1810 return err;
1811}
1812EXPORT_SYMBOL(xfrm_user_policy);
1813
85168c00
CW		 1814static DEFINE_SPINLOCK(xfrm_km_lock);
1815
1da177e4
LT		 1816int xfrm_register_km(struct xfrm_mgr *km)
1817{
85168c00
CW		 1818 spin_lock_bh(&xfrm_km_lock);
1819 list_add_tail_rcu(&km->list, &xfrm_km_list);
1820 spin_unlock_bh(&xfrm_km_lock);
1da177e4
LT		 1821 return 0;
1822}
1823EXPORT_SYMBOL(xfrm_register_km);
1824
1825int xfrm_unregister_km(struct xfrm_mgr *km)
1826{
85168c00
CW		 1827 spin_lock_bh(&xfrm_km_lock);
1828 list_del_rcu(&km->list);
1829 spin_unlock_bh(&xfrm_km_lock);
1830 synchronize_rcu();
1da177e4
LT		 1831 return 0;
1832}
1833EXPORT_SYMBOL(xfrm_unregister_km);
1834
1835int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1836{
1837 int err = 0;
1838 if (unlikely(afinfo == NULL))
1839 return -EINVAL;
1840 if (unlikely(afinfo->family >= NPROTO))
1841 return -EAFNOSUPPORT;
44abdc30 1842 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1843 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1844 err = -ENOBUFS;
edcd5821 1845 else
44abdc30
CW		 1846 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
1847 spin_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1848 return err;
1849}
1850EXPORT_SYMBOL(xfrm_state_register_afinfo);
1851
1852int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1853{
1854 int err = 0;
1855 if (unlikely(afinfo == NULL))
1856 return -EINVAL;
1857 if (unlikely(afinfo->family >= NPROTO))
1858 return -EAFNOSUPPORT;
44abdc30 1859 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1860 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1861 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1862 err = -EINVAL;
edcd5821 1863 else
44abdc30 1864 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1da177e4 1865 }
44abdc30
CW		 1866 spin_unlock_bh(&xfrm_state_afinfo_lock);
1867 synchronize_rcu();
1da177e4
LT		 1868 return err;
1869}
1870EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1871
628e341f 1872struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1873{
1874 struct xfrm_state_afinfo *afinfo;
1875 if (unlikely(family >= NPROTO))
1876 return NULL;
44abdc30
CW		 1877 rcu_read_lock();
1878 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
546be240 1879 if (unlikely(!afinfo))
44abdc30 1880 rcu_read_unlock();
1da177e4
LT		 1881 return afinfo;
1882}
1883
628e341f 1884void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1da177e4 1885{
44abdc30 1886 rcu_read_unlock();
1da177e4
LT		 1887}
1888
1889/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1890void xfrm_state_delete_tunnel(struct xfrm_state *x)
1891{
1892 if (x->tunnel) {
1893 struct xfrm_state *t = x->tunnel;
1894
1895 if (atomic_read(&t->tunnel_users) == 2)
1896 xfrm_state_delete(t);
1897 atomic_dec(&t->tunnel_users);
1898 xfrm_state_put(t);
1899 x->tunnel = NULL;
1900 }
1901}
1902EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1903
1904int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1905{
c5c25238 1906 int res;
1da177e4 1907
c5c25238
PM		 1908 spin_lock_bh(&x->lock);
1909 if (x->km.state == XFRM_STATE_VALID &&
1910 x->type && x->type->get_mtu)
1911 res = x->type->get_mtu(x, mtu);
1912 else
28121617 1913 res = mtu - x->props.header_len;
c5c25238 1914 spin_unlock_bh(&x->lock);
1da177e4
LT		 1915 return res;
1916}
1917
a454f0cc 1918int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
72cb6962 1919{
d094cd83 1920 struct xfrm_state_afinfo *afinfo;
df9dcb45 1921 struct xfrm_mode *inner_mode;
d094cd83 1922 int family = x->props.family;
72cb6962
HX		 1923 int err;
1924
d094cd83
HX		 1925 err = -EAFNOSUPPORT;
1926 afinfo = xfrm_state_get_afinfo(family);
1927 if (!afinfo)
1928 goto error;
1929
1930 err = 0;
1931 if (afinfo->init_flags)
1932 err = afinfo->init_flags(x);
1933
1934 xfrm_state_put_afinfo(afinfo);
1935
1936 if (err)
1937 goto error;
1938
1939 err = -EPROTONOSUPPORT;
13996378 1940
df9dcb45
KM		 1941 if (x->sel.family != AF_UNSPEC) {
1942 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1943 if (inner_mode == NULL)
1944 goto error;
1945
1946 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
1947 family != x->sel.family) {
1948 xfrm_put_mode(inner_mode);
1949 goto error;
1950 }
1951
1952 x->inner_mode = inner_mode;
1953 } else {
1954 struct xfrm_mode *inner_mode_iaf;
d81d2285 1955 int iafamily = AF_INET;
df9dcb45 1956
d81d2285 1957 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 1958 if (inner_mode == NULL)
1959 goto error;
1960
1961 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
1962 xfrm_put_mode(inner_mode);
1963 goto error;
1964 }
d81d2285 1965 x->inner_mode = inner_mode;
df9dcb45 1966
d81d2285
MW		 1967 if (x->props.family == AF_INET)
1968 iafamily = AF_INET6;
df9dcb45 1969
d81d2285
MW		 1970 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
1971 if (inner_mode_iaf) {
1972 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
1973 x->inner_mode_iaf = inner_mode_iaf;
1974 else
1975 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 1976 }
1977 }
13996378 1978
d094cd83 1979 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 1980 if (x->type == NULL)
1981 goto error;
1982
1983 err = x->type->init_state(x);
1984 if (err)
1985 goto error;
1986
13996378 1987 x->outer_mode = xfrm_get_mode(x->props.mode, family);
599901c3
JL		 1988 if (x->outer_mode == NULL) {
1989 err = -EPROTONOSUPPORT;
b59f45d0 1990 goto error;
599901c3 1991 }
b59f45d0 1992
a454f0cc
WY		 1993 if (init_replay) {
1994 err = xfrm_init_replay(x);
1995 if (err)
1996 goto error;
1997 }
1998
72cb6962
HX		 1999 x->km.state = XFRM_STATE_VALID;
2000
2001error:
2002 return err;
2003}
2004
a454f0cc
WY		 2005EXPORT_SYMBOL(__xfrm_init_state);
2006
2007int xfrm_init_state(struct xfrm_state *x)
2008{
2009 return __xfrm_init_state(x, true);
2010}
2011
72cb6962 2012EXPORT_SYMBOL(xfrm_init_state);
a716c119 2013
d62ddc21 2014int __net_init xfrm_state_init(struct net *net)
1da177e4 2015{
f034b5d4
DM		 2016 unsigned int sz;
2017
9d4139c7
AD		 2018 INIT_LIST_HEAD(&net->xfrm.state_all);
2019
f034b5d4
DM		 2020 sz = sizeof(struct hlist_head) * 8;
2021
73d189dc
AD		 2022 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2023 if (!net->xfrm.state_bydst)
2024 goto out_bydst;
d320bbb3
AD		 2025 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2026 if (!net->xfrm.state_bysrc)
2027 goto out_bysrc;
b754a4fd
AD		 2028 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2029 if (!net->xfrm.state_byspi)
2030 goto out_byspi;
529983ec 2031 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2032
0bf7c5b0 2033 net->xfrm.state_num = 0;
63082733 2034 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2035 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2036 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
283bc9f3 2037 spin_lock_init(&net->xfrm.xfrm_state_lock);
d62ddc21 2038 return 0;
73d189dc 2039
b754a4fd
AD		 2040out_byspi:
2041 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2042out_bysrc:
2043 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2044out_bydst:
2045 return -ENOMEM;
d62ddc21
AD		 2046}
2047
2048void xfrm_state_fini(struct net *net)
2049{
7c2776ee 2050 struct xfrm_audit audit_info;
73d189dc
AD		 2051 unsigned int sz;
2052
7c2776ee 2053 flush_work(&net->xfrm.state_hash_work);
e1760bd5 2054 audit_info.loginuid = INVALID_UID;
7c2776ee
AD		 2055 audit_info.sessionid = -1;
2056 audit_info.secid = 0;
2057 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2058 flush_work(&net->xfrm.state_gc_work);
2059
9d4139c7 2060 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2061
529983ec 2062 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2063 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2064 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2065 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2066 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2067 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2068 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2069}
2070
ab5f5e8b 2071#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2072static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2073 struct audit_buffer *audit_buf)
ab5f5e8b 2074{
68277acc
PM		 2075 struct xfrm_sec_ctx *ctx = x->security;
2076 u32 spi = ntohl(x->id.spi);
2077
2078 if (ctx)
ab5f5e8b 2079 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2080 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b
JL		 2081
2082 switch(x->props.family) {
2083 case AF_INET:
21454aaa
HH		 2084 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2085 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2086 break;
2087 case AF_INET6:
5b095d98 2088 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2089 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2090 break;
2091 }
68277acc
PM		 2092
2093 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2094}
2095
cf35f43e
IJ		 2096static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2097 struct audit_buffer *audit_buf)
afeb14b4 2098{
b71d1d42
ED		 2099 const struct iphdr *iph4;
2100 const struct ipv6hdr *iph6;
afeb14b4
PM		 2101
2102 switch (family) {
2103 case AF_INET:
2104 iph4 = ip_hdr(skb);
21454aaa
HH		 2105 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2106 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2107 break;
2108 case AF_INET6:
2109 iph6 = ipv6_hdr(skb);
2110 audit_log_format(audit_buf,
5b095d98 2111 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
fdb46ee7 2112 &iph6->saddr,&iph6->daddr,
afeb14b4
PM		 2113 iph6->flow_lbl[0] & 0x0f,
2114 iph6->flow_lbl[1],
2115 iph6->flow_lbl[2]);
2116 break;
2117 }
2118}
2119
68277acc 2120void xfrm_audit_state_add(struct xfrm_state *x, int result,
e1760bd5 2121 kuid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2122{
2123 struct audit_buffer *audit_buf;
ab5f5e8b 2124
afeb14b4 2125 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2126 if (audit_buf == NULL)
2127 return;
2532386f 2128 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2129 xfrm_audit_helper_sainfo(x, audit_buf);
2130 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2131 audit_log_end(audit_buf);
2132}
2133EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2134
68277acc 2135void xfrm_audit_state_delete(struct xfrm_state *x, int result,
e1760bd5 2136 kuid_t auid, u32 sessionid, u32 secid)
ab5f5e8b
JL		 2137{
2138 struct audit_buffer *audit_buf;
ab5f5e8b 2139
afeb14b4 2140 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2141 if (audit_buf == NULL)
2142 return;
2532386f 2143 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
afeb14b4
PM		 2144 xfrm_audit_helper_sainfo(x, audit_buf);
2145 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2146 audit_log_end(audit_buf);
2147}
2148EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2149
2150void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2151 struct sk_buff *skb)
2152{
2153 struct audit_buffer *audit_buf;
2154 u32 spi;
2155
2156 audit_buf = xfrm_audit_start("SA-replay-overflow");
2157 if (audit_buf == NULL)
2158 return;
2159 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2160 /* don't record the sequence number because it's inherent in this kind
2161 * of audit message */
2162 spi = ntohl(x->id.spi);
2163 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2164 audit_log_end(audit_buf);
2165}
2166EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2167
9fdc4883 2168void xfrm_audit_state_replay(struct xfrm_state *x,
afeb14b4
PM		 2169 struct sk_buff *skb, __be32 net_seq)
2170{
2171 struct audit_buffer *audit_buf;
2172 u32 spi;
2173
2174 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2175 if (audit_buf == NULL)
2176 return;
2177 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2178 spi = ntohl(x->id.spi);
2179 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2180 spi, spi, ntohl(net_seq));
2181 audit_log_end(audit_buf);
2182}
9fdc4883 2183EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
afeb14b4
PM		 2184
2185void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2186{
2187 struct audit_buffer *audit_buf;
2188
2189 audit_buf = xfrm_audit_start("SA-notfound");
2190 if (audit_buf == NULL)
2191 return;
2192 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2193 audit_log_end(audit_buf);
2194}
2195EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2196
2197void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2198 __be32 net_spi, __be32 net_seq)
2199{
2200 struct audit_buffer *audit_buf;
2201 u32 spi;
2202
2203 audit_buf = xfrm_audit_start("SA-notfound");
2204 if (audit_buf == NULL)
2205 return;
2206 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2207 spi = ntohl(net_spi);
2208 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2209 spi, spi, ntohl(net_seq));
2210 audit_log_end(audit_buf);
2211}
2212EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2213
2214void xfrm_audit_state_icvfail(struct xfrm_state *x,
2215 struct sk_buff *skb, u8 proto)
2216{
2217 struct audit_buffer *audit_buf;
2218 __be32 net_spi;
2219 __be32 net_seq;
2220
2221 audit_buf = xfrm_audit_start("SA-icv-failure");
2222 if (audit_buf == NULL)
2223 return;
2224 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2225 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2226 u32 spi = ntohl(net_spi);
2227 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2228 spi, spi, ntohl(net_seq));
2229 }
2230 audit_log_end(audit_buf);
2231}
2232EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2233#endif /* CONFIG_AUDITSYSCALL */
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