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[deliverable/linux.git] / net / xfrm / xfrm_state.c
CommitLineData
1da177e4
LT		 1/*
2 * xfrm_state.c
3 *
4 * Changes:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific functions
11 * Derek Atkins <derek@ihtfp.com>
12 * Add UDP Encapsulation
df71837d 13 *
1da177e4
LT		 14 */
15
16#include <linux/workqueue.h>
17#include <net/xfrm.h>
18#include <linux/pfkeyv2.h>
19#include <linux/ipsec.h>
20#include <linux/module.h>
f034b5d4 21#include <linux/cache.h>
68277acc 22#include <linux/audit.h>
b5890d8b 23#include <asm/uaccess.h>
9e0d57fd 24#include <linux/ktime.h>
5a0e3ad6 25#include <linux/slab.h>
9e0d57fd
YP		 26#include <linux/interrupt.h>
27#include <linux/kernel.h>
1da177e4 28
44e36b42
DM		 29#include "xfrm_hash.h"
30
1da177e4
LT		 31/* Each xfrm_state may be linked to two tables:
32
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 34 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 35 destination/tunnel endpoint. (output)
36 */
37
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);
0f24558e 164bool km_is_alive(const struct km_event *c);
15e47304 165void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
1da177e4 166
7a9885b9 167static DEFINE_SPINLOCK(xfrm_type_lock);
533cb5b0 168int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 169{
7a9885b9 170 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
533cb5b0 171 const struct xfrm_type **typemap;
aa5d62cc
HX		 172 int err = 0;
173
174 if (unlikely(afinfo == NULL))
175 return -EAFNOSUPPORT;
176 typemap = afinfo->type_map;
7a9885b9 177 spin_lock_bh(&xfrm_type_lock);
aa5d62cc
HX		 178
179 if (likely(typemap[type->proto] == NULL))
180 typemap[type->proto] = type;
181 else
182 err = -EEXIST;
7a9885b9
CW		 183 spin_unlock_bh(&xfrm_type_lock);
184 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 185 return err;
186}
187EXPORT_SYMBOL(xfrm_register_type);
188
533cb5b0 189int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 190{
7a9885b9 191 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
533cb5b0 192 const struct xfrm_type **typemap;
aa5d62cc
HX		 193 int err = 0;
194
195 if (unlikely(afinfo == NULL))
196 return -EAFNOSUPPORT;
197 typemap = afinfo->type_map;
7a9885b9 198 spin_lock_bh(&xfrm_type_lock);
aa5d62cc
HX		 199
200 if (unlikely(typemap[type->proto] != type))
201 err = -ENOENT;
202 else
203 typemap[type->proto] = NULL;
7a9885b9
CW		 204 spin_unlock_bh(&xfrm_type_lock);
205 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 206 return err;
207}
208EXPORT_SYMBOL(xfrm_unregister_type);
209
533cb5b0 210static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc
HX		 211{
212 struct xfrm_state_afinfo *afinfo;
533cb5b0
ED		 213 const struct xfrm_type **typemap;
214 const struct xfrm_type *type;
aa5d62cc
HX		 215 int modload_attempted = 0;
216
217retry:
218 afinfo = xfrm_state_get_afinfo(family);
219 if (unlikely(afinfo == NULL))
220 return NULL;
221 typemap = afinfo->type_map;
222
223 type = typemap[proto];
224 if (unlikely(type && !try_module_get(type->owner)))
225 type = NULL;
226 if (!type && !modload_attempted) {
227 xfrm_state_put_afinfo(afinfo);
228 request_module("xfrm-type-%d-%d", family, proto);
229 modload_attempted = 1;
230 goto retry;
231 }
232
233 xfrm_state_put_afinfo(afinfo);
234 return type;
235}
236
533cb5b0 237static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 238{
239 module_put(type->owner);
240}
241
7a9885b9 242static DEFINE_SPINLOCK(xfrm_mode_lock);
aa5d62cc
HX		 243int xfrm_register_mode(struct xfrm_mode *mode, int family)
244{
245 struct xfrm_state_afinfo *afinfo;
246 struct xfrm_mode **modemap;
247 int err;
248
249 if (unlikely(mode->encap >= XFRM_MODE_MAX))
250 return -EINVAL;
251
7a9885b9 252 afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 253 if (unlikely(afinfo == NULL))
254 return -EAFNOSUPPORT;
255
256 err = -EEXIST;
257 modemap = afinfo->mode_map;
7a9885b9 258 spin_lock_bh(&xfrm_mode_lock);
17c2a42a
HX		 259 if (modemap[mode->encap])
260 goto out;
aa5d62cc 261
17c2a42a
HX		 262 err = -ENOENT;
263 if (!try_module_get(afinfo->owner))
264 goto out;
265
266 mode->afinfo = afinfo;
267 modemap[mode->encap] = mode;
268 err = 0;
269
270out:
7a9885b9
CW		 271 spin_unlock_bh(&xfrm_mode_lock);
272 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 273 return err;
274}
275EXPORT_SYMBOL(xfrm_register_mode);
276
277int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
278{
279 struct xfrm_state_afinfo *afinfo;
280 struct xfrm_mode **modemap;
281 int err;
282
283 if (unlikely(mode->encap >= XFRM_MODE_MAX))
284 return -EINVAL;
285
7a9885b9 286 afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 287 if (unlikely(afinfo == NULL))
288 return -EAFNOSUPPORT;
289
290 err = -ENOENT;
291 modemap = afinfo->mode_map;
7a9885b9 292 spin_lock_bh(&xfrm_mode_lock);
aa5d62cc
HX		 293 if (likely(modemap[mode->encap] == mode)) {
294 modemap[mode->encap] = NULL;
17c2a42a 295 module_put(mode->afinfo->owner);
aa5d62cc
HX		 296 err = 0;
297 }
298
7a9885b9
CW		 299 spin_unlock_bh(&xfrm_mode_lock);
300 xfrm_state_put_afinfo(afinfo);
aa5d62cc
HX		 301 return err;
302}
303EXPORT_SYMBOL(xfrm_unregister_mode);
304
305static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
306{
307 struct xfrm_state_afinfo *afinfo;
308 struct xfrm_mode *mode;
309 int modload_attempted = 0;
310
311 if (unlikely(encap >= XFRM_MODE_MAX))
312 return NULL;
313
314retry:
315 afinfo = xfrm_state_get_afinfo(family);
316 if (unlikely(afinfo == NULL))
317 return NULL;
318
319 mode = afinfo->mode_map[encap];
320 if (unlikely(mode && !try_module_get(mode->owner)))
321 mode = NULL;
322 if (!mode && !modload_attempted) {
323 xfrm_state_put_afinfo(afinfo);
324 request_module("xfrm-mode-%d-%d", family, encap);
325 modload_attempted = 1;
326 goto retry;
327 }
328
329 xfrm_state_put_afinfo(afinfo);
330 return mode;
331}
332
333static void xfrm_put_mode(struct xfrm_mode *mode)
334{
335 module_put(mode->owner);
336}
337
1da177e4
LT		 338static void xfrm_state_gc_destroy(struct xfrm_state *x)
339{
9e0d57fd 340 tasklet_hrtimer_cancel(&x->mtimer);
a47f0ce0 341 del_timer_sync(&x->rtimer);
a51482bd
JJ		 342 kfree(x->aalg);
343 kfree(x->ealg);
344 kfree(x->calg);
345 kfree(x->encap);
060f02a3 346 kfree(x->coaddr);
d8647b79
SK		 347 kfree(x->replay_esn);
348 kfree(x->preplay_esn);
13996378
HX		 349 if (x->inner_mode)
350 xfrm_put_mode(x->inner_mode);
df9dcb45
KM		 351 if (x->inner_mode_iaf)
352 xfrm_put_mode(x->inner_mode_iaf);
13996378
HX		 353 if (x->outer_mode)
354 xfrm_put_mode(x->outer_mode);
1da177e4
LT		 355 if (x->type) {
356 x->type->destructor(x);
357 xfrm_put_type(x->type);
358 }
df71837d 359 security_xfrm_state_free(x);
1da177e4
LT		 360 kfree(x);
361}
362
c7837144 363static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 364{
c7837144 365 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
12a169e7 366 struct xfrm_state *x;
b67bfe0d 367 struct hlist_node *tmp;
12a169e7 368 struct hlist_head gc_list;
1da177e4 369
1da177e4 370 spin_lock_bh(&xfrm_state_gc_lock);
c7837144 371 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
1da177e4
LT		 372 spin_unlock_bh(&xfrm_state_gc_lock);
373
b67bfe0d 374 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
1da177e4 375 xfrm_state_gc_destroy(x);
1da177e4
LT		 376}
377
378static inline unsigned long make_jiffies(long secs)
379{
380 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
381 return MAX_SCHEDULE_TIMEOUT-1;
382 else
a716c119 383 return secs*HZ;
1da177e4
LT		 384}
385
3e94c2dc 386static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
1da177e4 387{
9e0d57fd
YP		 388 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
389 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
9d729f72 390 unsigned long now = get_seconds();
1da177e4
LT		 391 long next = LONG_MAX;
392 int warn = 0;
161a09e7 393 int err = 0;
1da177e4
LT		 394
395 spin_lock(&x->lock);
396 if (x->km.state == XFRM_STATE_DEAD)
397 goto out;
398 if (x->km.state == XFRM_STATE_EXPIRED)
399 goto expired;
400 if (x->lft.hard_add_expires_seconds) {
401 long tmo = x->lft.hard_add_expires_seconds +
402 x->curlft.add_time - now;
e3c0d047
FD		 403 if (tmo <= 0) {
404 if (x->xflags & XFRM_SOFT_EXPIRE) {
405 /* enter hard expire without soft expire first?!
406 * setting a new date could trigger this.
407 * workarbound: fix x->curflt.add_time by below:
408 */
409 x->curlft.add_time = now - x->saved_tmo - 1;
410 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
411 } else
412 goto expired;
413 }
1da177e4
LT		 414 if (tmo < next)
415 next = tmo;
416 }
417 if (x->lft.hard_use_expires_seconds) {
418 long tmo = x->lft.hard_use_expires_seconds +
419 (x->curlft.use_time ? : now) - now;
420 if (tmo <= 0)
421 goto expired;
422 if (tmo < next)
423 next = tmo;
424 }
425 if (x->km.dying)
426 goto resched;
427 if (x->lft.soft_add_expires_seconds) {
428 long tmo = x->lft.soft_add_expires_seconds +
429 x->curlft.add_time - now;
e3c0d047 430 if (tmo <= 0) {
1da177e4 431 warn = 1;
e3c0d047
FD		 432 x->xflags &= ~XFRM_SOFT_EXPIRE;
433 } else if (tmo < next) {
1da177e4 434 next = tmo;
e3c0d047
FD		 435 x->xflags |= XFRM_SOFT_EXPIRE;
436 x->saved_tmo = tmo;
437 }
1da177e4
LT		 438 }
439 if (x->lft.soft_use_expires_seconds) {
440 long tmo = x->lft.soft_use_expires_seconds +
441 (x->curlft.use_time ? : now) - now;
442 if (tmo <= 0)
443 warn = 1;
444 else if (tmo < next)
445 next = tmo;
446 }
447
4666faab 448 x->km.dying = warn;
1da177e4 449 if (warn)
53bc6b4d 450 km_state_expired(x, 0, 0);
1da177e4 451resched:
9b7a787d 452 if (next != LONG_MAX) {
9e0d57fd
YP		 453 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
454 }
a47f0ce0 455
1da177e4
LT		 456 goto out;
457
458expired:
5b8ef341 459 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
1da177e4 460 x->km.state = XFRM_STATE_EXPIRED;
161a09e7
JL		 461
462 err = __xfrm_state_delete(x);
0806ae4c 463 if (!err)
53bc6b4d 464 km_state_expired(x, 1, 0);
1da177e4 465
2e71029e 466 xfrm_audit_state_delete(x, err ? 0 : 1, true);
161a09e7 467
1da177e4
LT		 468out:
469 spin_unlock(&x->lock);
9e0d57fd 470 return HRTIMER_NORESTART;
1da177e4
LT		 471}
472
0ac84752
DM		 473static void xfrm_replay_timer_handler(unsigned long data);
474
673c09be 475struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 476{
477 struct xfrm_state *x;
478
0da974f4 479 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
1da177e4
LT		 480
481 if (x) {
673c09be 482 write_pnet(&x->xs_net, net);
1da177e4
LT		 483 atomic_set(&x->refcnt, 1);
484 atomic_set(&x->tunnel_users, 0);
12a169e7 485 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 486 INIT_HLIST_NODE(&x->bydst);
487 INIT_HLIST_NODE(&x->bysrc);
488 INIT_HLIST_NODE(&x->byspi);
99565a6c
FD		 489 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
490 CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
b24b8a24
PE		 491 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
492 (unsigned long)x);
9d729f72 493 x->curlft.add_time = get_seconds();
1da177e4
LT		 494 x->lft.soft_byte_limit = XFRM_INF;
495 x->lft.soft_packet_limit = XFRM_INF;
496 x->lft.hard_byte_limit = XFRM_INF;
497 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 498 x->replay_maxage = 0;
499 x->replay_maxdiff = 0;
df9dcb45
KM		 500 x->inner_mode = NULL;
501 x->inner_mode_iaf = NULL;
1da177e4
LT		 502 spin_lock_init(&x->lock);
503 }
504 return x;
505}
506EXPORT_SYMBOL(xfrm_state_alloc);
507
508void __xfrm_state_destroy(struct xfrm_state *x)
509{
98806f75
AD		 510 struct net *net = xs_net(x);
511
547b792c 512 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4
LT		 513
514 spin_lock_bh(&xfrm_state_gc_lock);
98806f75 515 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
1da177e4 516 spin_unlock_bh(&xfrm_state_gc_lock);
98806f75 517 schedule_work(&net->xfrm.state_gc_work);
1da177e4
LT		 518}
519EXPORT_SYMBOL(__xfrm_state_destroy);
520
53bc6b4d 521int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 522{
98806f75 523 struct net *net = xs_net(x);
26b15dad
JHS		 524 int err = -ESRCH;
525
1da177e4
LT		 526 if (x->km.state != XFRM_STATE_DEAD) {
527 x->km.state = XFRM_STATE_DEAD;
283bc9f3 528 spin_lock(&net->xfrm.xfrm_state_lock);
12a169e7 529 list_del(&x->km.all);
8f126e37 530 hlist_del(&x->bydst);
8f126e37 531 hlist_del(&x->bysrc);
a47f0ce0 532 if (x->id.spi)
8f126e37 533 hlist_del(&x->byspi);
98806f75 534 net->xfrm.state_num--;
283bc9f3 535 spin_unlock(&net->xfrm.xfrm_state_lock);
1da177e4 536
1da177e4
LT		 537 /* All xfrm_state objects are created by xfrm_state_alloc.
538 * The xfrm_state_alloc call gives a reference, and that
539 * is what we are dropping here.
540 */
5dba4797 541 xfrm_state_put(x);
26b15dad 542 err = 0;
1da177e4 543 }
26b15dad
JHS		 544
545 return err;
1da177e4 546}
53bc6b4d 547EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 548
26b15dad 549int xfrm_state_delete(struct xfrm_state *x)
1da177e4 550{
26b15dad
JHS		 551 int err;
552
1da177e4 553 spin_lock_bh(&x->lock);
26b15dad 554 err = __xfrm_state_delete(x);
1da177e4 555 spin_unlock_bh(&x->lock);
26b15dad
JHS		 556
557 return err;
1da177e4
LT		 558}
559EXPORT_SYMBOL(xfrm_state_delete);
560
4aa2e62c
JL		 561#ifdef CONFIG_SECURITY_NETWORK_XFRM
562static inline int
2e71029e 563xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
1da177e4 564{
4aa2e62c
JL		 565 int i, err = 0;
566
0e602451 567 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 568 struct xfrm_state *x;
569
b67bfe0d 570 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 571 if (xfrm_id_proto_match(x->id.proto, proto) &&
572 (err = security_xfrm_state_delete(x)) != 0) {
2e71029e 573 xfrm_audit_state_delete(x, 0, task_valid);
4aa2e62c
JL		 574 return err;
575 }
576 }
577 }
578
579 return err;
580}
581#else
582static inline int
2e71029e 583xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
4aa2e62c
JL		 584{
585 return 0;
586}
587#endif
588
2e71029e 589int xfrm_state_flush(struct net *net, u8 proto, bool task_valid)
4aa2e62c 590{
9e64cc95 591 int i, err = 0, cnt = 0;
1da177e4 592
283bc9f3 593 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2e71029e 594 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
4aa2e62c
JL		 595 if (err)
596 goto out;
597
9e64cc95 598 err = -ESRCH;
0e602451 599 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37 600 struct xfrm_state *x;
1da177e4 601restart:
b67bfe0d 602 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1da177e4 603 if (!xfrm_state_kern(x) &&
5794708f 604 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4 605 xfrm_state_hold(x);
283bc9f3 606 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 607
161a09e7 608 err = xfrm_state_delete(x);
ab5f5e8b 609 xfrm_audit_state_delete(x, err ? 0 : 1,
2e71029e 610 task_valid);
1da177e4 611 xfrm_state_put(x);
9e64cc95
JHS		 612 if (!err)
613 cnt++;
1da177e4 614
283bc9f3 615 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 616 goto restart;
617 }
618 }
619 }
9e64cc95
JHS		 620 if (cnt)
621 err = 0;
4aa2e62c
JL		 622
623out:
283bc9f3 624 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
4aa2e62c 625 return err;
1da177e4
LT		 626}
627EXPORT_SYMBOL(xfrm_state_flush);
628
e071041b 629void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b 630{
283bc9f3 631 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e071041b
AD		 632 si->sadcnt = net->xfrm.state_num;
633 si->sadhcnt = net->xfrm.state_hmask;
28d8909b 634 si->sadhmcnt = xfrm_state_hashmax;
283bc9f3 635 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
28d8909b
JHS		 636}
637EXPORT_SYMBOL(xfrm_sad_getinfo);
638
1da177e4 639static int
1a898592 640xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
04686013 641 const struct xfrm_tmpl *tmpl,
33765d06 642 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
8444cf71 643 unsigned short family)
1da177e4
LT		 644{
645 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
646 if (!afinfo)
647 return -1;
8444cf71
TE		 648 afinfo->init_tempsel(&x->sel, fl);
649
650 if (family != tmpl->encap_family) {
651 xfrm_state_put_afinfo(afinfo);
652 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
653 if (!afinfo)
654 return -1;
655 }
656 afinfo->init_temprop(x, tmpl, daddr, saddr);
1da177e4
LT		 657 xfrm_state_put_afinfo(afinfo);
658 return 0;
659}
660
9aa60088
DM		 661static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
662 const xfrm_address_t *daddr,
663 __be32 spi, u8 proto,
664 unsigned short family)
edcd5821 665{
221df1ed 666 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821
DM		 667 struct xfrm_state *x;
668
b67bfe0d 669 hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) {
edcd5821
DM		 670 if (x->props.family != family ||
671 x->id.spi != spi ||
1802571b 672 x->id.proto != proto ||
70e94e66 673 !xfrm_addr_equal(&x->id.daddr, daddr, family))
edcd5821
DM		 674 continue;
675
3d6acfa7
JHS		 676 if ((mark & x->mark.m) != x->mark.v)
677 continue;
edcd5821
DM		 678 xfrm_state_hold(x);
679 return x;
680 }
681
682 return NULL;
683}
684
9aa60088
DM		 685static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
686 const xfrm_address_t *daddr,
687 const xfrm_address_t *saddr,
688 u8 proto, unsigned short family)
edcd5821 689{
221df1ed 690 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821
DM		 691 struct xfrm_state *x;
692
b67bfe0d 693 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
edcd5821 694 if (x->props.family != family ||
1802571b 695 x->id.proto != proto ||
70e94e66
YH		 696 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
697 !xfrm_addr_equal(&x->props.saddr, saddr, family))
edcd5821
DM		 698 continue;
699
3d6acfa7
JHS		 700 if ((mark & x->mark.m) != x->mark.v)
701 continue;
edcd5821
DM		 702 xfrm_state_hold(x);
703 return x;
704 }
705
706 return NULL;
707}
708
709static inline struct xfrm_state *
710__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
711{
221df1ed 712 struct net *net = xs_net(x);
bd55775c 713 u32 mark = x->mark.v & x->mark.m;
221df1ed 714
edcd5821 715 if (use_spi)
bd55775c
JHS		 716 return __xfrm_state_lookup(net, mark, &x->id.daddr,
717 x->id.spi, x->id.proto, family);
edcd5821 718 else
bd55775c
JHS		 719 return __xfrm_state_lookup_byaddr(net, mark,
720 &x->id.daddr,
edcd5821
DM		 721 &x->props.saddr,
722 x->id.proto, family);
723}
724
98806f75 725static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 726{
727 if (have_hash_collision &&
98806f75
AD		 728 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
729 net->xfrm.state_num > net->xfrm.state_hmask)
730 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 731}
732
08ec9af1 733static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
4a08ab0f 734 const struct flowi *fl, unsigned short family,
08ec9af1
DM		 735 struct xfrm_state **best, int *acq_in_progress,
736 int *error)
737{
738 /* Resolution logic:
739 * 1. There is a valid state with matching selector. Done.
740 * 2. Valid state with inappropriate selector. Skip.
741 *
742 * Entering area of "sysdeps".
743 *
744 * 3. If state is not valid, selector is temporary, it selects
745 * only session which triggered previous resolution. Key
746 * manager will do something to install a state with proper
747 * selector.
748 */
749 if (x->km.state == XFRM_STATE_VALID) {
750 if ((x->sel.family &&
751 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
752 !security_xfrm_state_pol_flow_match(x, pol, fl))
753 return;
754
755 if (!*best ||
756 (*best)->km.dying > x->km.dying ||
757 ((*best)->km.dying == x->km.dying &&
758 (*best)->curlft.add_time < x->curlft.add_time))
759 *best = x;
760 } else if (x->km.state == XFRM_STATE_ACQ) {
761 *acq_in_progress = 1;
762 } else if (x->km.state == XFRM_STATE_ERROR ||
763 x->km.state == XFRM_STATE_EXPIRED) {
764 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
765 security_xfrm_state_pol_flow_match(x, pol, fl))
766 *error = -ESRCH;
767 }
768}
769
1da177e4 770struct xfrm_state *
33765d06 771xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
b520e9f6 772 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1da177e4
LT		 773 struct xfrm_policy *pol, int *err,
774 unsigned short family)
775{
08ec9af1 776 static xfrm_address_t saddr_wildcard = { };
5447c5e4 777 struct net *net = xp_net(pol);
6a783c90 778 unsigned int h, h_wildcard;
37b08e34 779 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 780 int acquire_in_progress = 0;
781 int error = 0;
782 struct xfrm_state *best = NULL;
bd55775c 783 u32 mark = pol->mark.v & pol->mark.m;
8444cf71 784 unsigned short encap_family = tmpl->encap_family;
0f24558e 785 struct km_event c;
a716c119 786
37b08e34
DM		 787 to_put = NULL;
788
283bc9f3 789 spin_lock_bh(&net->xfrm.xfrm_state_lock);
8444cf71 790 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
b67bfe0d 791 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
8444cf71 792 if (x->props.family == encap_family &&
1da177e4 793 x->props.reqid == tmpl->reqid &&
3d6acfa7 794 (mark & x->mark.m) == x->mark.v &&
fbd9a5b4 795 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 796 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1da177e4
LT		 797 tmpl->mode == x->props.mode &&
798 tmpl->id.proto == x->id.proto &&
08ec9af1 799 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 800 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1
DM		 801 &best, &acquire_in_progress, &error);
802 }
6f115638 803 if (best || acquire_in_progress)
08ec9af1
DM		 804 goto found;
805
8444cf71 806 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
b67bfe0d 807 hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) {
8444cf71 808 if (x->props.family == encap_family &&
08ec9af1 809 x->props.reqid == tmpl->reqid &&
3d6acfa7 810 (mark & x->mark.m) == x->mark.v &&
08ec9af1 811 !(x->props.flags & XFRM_STATE_WILDRECV) &&
f59bbdfa 812 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
08ec9af1
DM		 813 tmpl->mode == x->props.mode &&
814 tmpl->id.proto == x->id.proto &&
815 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1f673c5f 816 xfrm_state_look_at(pol, x, fl, encap_family,
08ec9af1 817 &best, &acquire_in_progress, &error);
1da177e4
LT		 818 }
819
08ec9af1 820found:
1da177e4
LT		 821 x = best;
822 if (!x && !error && !acquire_in_progress) {
5c5d281a 823 if (tmpl->id.spi &&
bd55775c 824 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
8444cf71 825 tmpl->id.proto, encap_family)) != NULL) {
37b08e34 826 to_put = x0;
1da177e4
LT		 827 error = -EEXIST;
828 goto out;
829 }
0f24558e
HG		 830
831 c.net = net;
832 /* If the KMs have no listeners (yet...), avoid allocating an SA
833 * for each and every packet - garbage collection might not
834 * handle the flood.
835 */
836 if (!km_is_alive(&c)) {
837 error = -ESRCH;
838 goto out;
839 }
840
5447c5e4 841 x = xfrm_state_alloc(net);
1da177e4
LT		 842 if (x == NULL) {
843 error = -ENOMEM;
844 goto out;
845 }
8444cf71 846 /* Initialize temporary state matching only
1da177e4 847 * to current session. */
8444cf71 848 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
bd55775c 849 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
1da177e4 850
1d28f42c 851 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
e0d1caa7
VY		 852 if (error) {
853 x->km.state = XFRM_STATE_DEAD;
37b08e34 854 to_put = x;
e0d1caa7
VY		 855 x = NULL;
856 goto out;
857 }
858
1da177e4
LT		 859 if (km_query(x, tmpl, pol) == 0) {
860 x->km.state = XFRM_STATE_ACQ;
5447c5e4
AD		 861 list_add(&x->km.all, &net->xfrm.state_all);
862 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
8444cf71 863 h = xfrm_src_hash(net, daddr, saddr, encap_family);
5447c5e4 864 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 865 if (x->id.spi) {
8444cf71 866 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
5447c5e4 867 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
1da177e4 868 }
b27aeadb 869 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
9e0d57fd 870 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 871 net->xfrm.state_num++;
872 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 873 } else {
874 x->km.state = XFRM_STATE_DEAD;
37b08e34 875 to_put = x;
1da177e4
LT		 876 x = NULL;
877 error = -ESRCH;
878 }
879 }
880out:
881 if (x)
882 xfrm_state_hold(x);
883 else
884 *err = acquire_in_progress ? -EAGAIN : error;
283bc9f3 885 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
37b08e34
DM		 886 if (to_put)
887 xfrm_state_put(to_put);
1da177e4
LT		 888 return x;
889}
890
628529b6 891struct xfrm_state *
bd55775c 892xfrm_stateonly_find(struct net *net, u32 mark,
5447c5e4 893 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 894 unsigned short family, u8 mode, u8 proto, u32 reqid)
895{
4bda4f25 896 unsigned int h;
628529b6 897 struct xfrm_state *rx = NULL, *x = NULL;
628529b6 898
4ae770bf 899 spin_lock_bh(&net->xfrm.xfrm_state_lock);
5447c5e4 900 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
b67bfe0d 901 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 902 if (x->props.family == family &&
903 x->props.reqid == reqid &&
3d6acfa7 904 (mark & x->mark.m) == x->mark.v &&
628529b6
JHS		 905 !(x->props.flags & XFRM_STATE_WILDRECV) &&
906 xfrm_state_addr_check(x, daddr, saddr, family) &&
907 mode == x->props.mode &&
908 proto == x->id.proto &&
909 x->km.state == XFRM_STATE_VALID) {
910 rx = x;
911 break;
912 }
913 }
914
915 if (rx)
916 xfrm_state_hold(rx);
4ae770bf 917 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
628529b6
JHS		 918
919
920 return rx;
921}
922EXPORT_SYMBOL(xfrm_stateonly_find);
923
c454997e
FD		 924struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
925 unsigned short family)
926{
927 struct xfrm_state *x;
928 struct xfrm_state_walk *w;
929
930 spin_lock_bh(&net->xfrm.xfrm_state_lock);
931 list_for_each_entry(w, &net->xfrm.state_all, all) {
932 x = container_of(w, struct xfrm_state, km);
933 if (x->props.family != family ||
934 x->id.spi != spi)
935 continue;
936
937 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
938 xfrm_state_hold(x);
939 return x;
940 }
941 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
942 return NULL;
943}
944EXPORT_SYMBOL(xfrm_state_lookup_byspi);
945
1da177e4
LT		 946static void __xfrm_state_insert(struct xfrm_state *x)
947{
98806f75 948 struct net *net = xs_net(x);
a624c108 949 unsigned int h;
1da177e4 950
98806f75 951 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 952
98806f75 953 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 954 x->props.reqid, x->props.family);
98806f75 955 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1da177e4 956
98806f75
AD		 957 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
958 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
1da177e4 959
7b4dc360 960 if (x->id.spi) {
98806f75 961 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 962 x->props.family);
963
98806f75 964 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
6c44e6b7
MN		 965 }
966
9e0d57fd 967 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
a47f0ce0
DM		 968 if (x->replay_maxage)
969 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 970
98806f75 971 net->xfrm.state_num++;
f034b5d4 972
98806f75 973 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 974}
975
283bc9f3 976/* net->xfrm.xfrm_state_lock is held */
c7f5ea3a
DM		 977static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
978{
98806f75 979 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 980 unsigned short family = xnew->props.family;
981 u32 reqid = xnew->props.reqid;
982 struct xfrm_state *x;
c7f5ea3a 983 unsigned int h;
3d6acfa7 984 u32 mark = xnew->mark.v & xnew->mark.m;
c7f5ea3a 985
98806f75 986 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
b67bfe0d 987 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 988 if (x->props.family == family &&
989 x->props.reqid == reqid &&
3d6acfa7 990 (mark & x->mark.m) == x->mark.v &&
70e94e66
YH		 991 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
992 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 993 x->genid++;
c7f5ea3a
DM		 994 }
995}
996
1da177e4
LT		 997void xfrm_state_insert(struct xfrm_state *x)
998{
283bc9f3
FD		 999 struct net *net = xs_net(x);
1000
1001 spin_lock_bh(&net->xfrm.xfrm_state_lock);
c7f5ea3a 1002 __xfrm_state_bump_genids(x);
1da177e4 1003 __xfrm_state_insert(x);
283bc9f3 1004 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1005}
1006EXPORT_SYMBOL(xfrm_state_insert);
1007
283bc9f3 1008/* net->xfrm.xfrm_state_lock is held */
e473fcb4
MK		 1009static struct xfrm_state *__find_acq_core(struct net *net,
1010 const struct xfrm_mark *m,
a70486f0
DM		 1011 unsigned short family, u8 mode,
1012 u32 reqid, u8 proto,
1013 const xfrm_address_t *daddr,
e473fcb4
MK		 1014 const xfrm_address_t *saddr,
1015 int create)
2770834c 1016{
5447c5e4 1017 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
2770834c 1018 struct xfrm_state *x;
3d6acfa7 1019 u32 mark = m->v & m->m;
2770834c 1020
b67bfe0d 1021 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 1022 if (x->props.reqid != reqid ||
1023 x->props.mode != mode ||
1024 x->props.family != family ||
1025 x->km.state != XFRM_STATE_ACQ ||
75e252d9 1026 x->id.spi != 0 ||
1802571b 1027 x->id.proto != proto ||
3d6acfa7 1028 (mark & x->mark.m) != x->mark.v ||
70e94e66
YH		 1029 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1030 !xfrm_addr_equal(&x->props.saddr, saddr, family))
2770834c
DM		 1031 continue;
1032
2770834c
DM		 1033 xfrm_state_hold(x);
1034 return x;
1035 }
1036
1037 if (!create)
1038 return NULL;
1039
5447c5e4 1040 x = xfrm_state_alloc(net);
2770834c
DM		 1041 if (likely(x)) {
1042 switch (family) {
1043 case AF_INET:
1044 x->sel.daddr.a4 = daddr->a4;
1045 x->sel.saddr.a4 = saddr->a4;
1046 x->sel.prefixlen_d = 32;
1047 x->sel.prefixlen_s = 32;
1048 x->props.saddr.a4 = saddr->a4;
1049 x->id.daddr.a4 = daddr->a4;
1050 break;
1051
1052 case AF_INET6:
4e3fd7a0
AD		 1053 *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
1054 *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
2770834c
DM		 1055 x->sel.prefixlen_d = 128;
1056 x->sel.prefixlen_s = 128;
4e3fd7a0
AD		 1057 *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
1058 *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
2770834c 1059 break;
3ff50b79 1060 }
2770834c
DM		 1061
1062 x->km.state = XFRM_STATE_ACQ;
1063 x->id.proto = proto;
1064 x->props.family = family;
1065 x->props.mode = mode;
1066 x->props.reqid = reqid;
bd55775c
JHS		 1067 x->mark.v = m->v;
1068 x->mark.m = m->m;
b27aeadb 1069 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1070 xfrm_state_hold(x);
9e0d57fd 1071 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
5447c5e4
AD		 1072 list_add(&x->km.all, &net->xfrm.state_all);
1073 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1074 h = xfrm_src_hash(net, daddr, saddr, family);
1075 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
918049f0 1076
5447c5e4 1077 net->xfrm.state_num++;
918049f0 1078
5447c5e4 1079 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1080 }
1081
1082 return x;
1083}
1084
bd55775c 1085static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1086
1087int xfrm_state_add(struct xfrm_state *x)
1088{
5447c5e4 1089 struct net *net = xs_net(x);
37b08e34 1090 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1091 int family;
1092 int err;
bd55775c 1093 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1094 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1095
1096 family = x->props.family;
1da177e4 1097
37b08e34
DM		 1098 to_put = NULL;
1099
283bc9f3 1100 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1101
edcd5821 1102 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1103 if (x1) {
37b08e34 1104 to_put = x1;
1da177e4
LT		 1105 x1 = NULL;
1106 err = -EEXIST;
1107 goto out;
1108 }
1109
eb2971b6 1110 if (use_spi && x->km.seq) {
bd55775c 1111 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9 1112 if (x1 && ((x1->id.proto != x->id.proto) ||
70e94e66 1113 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1114 to_put = x1;
1da177e4
LT		 1115 x1 = NULL;
1116 }
1117 }
1118
eb2971b6 1119 if (use_spi && !x1)
bd55775c
JHS		 1120 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1121 x->props.reqid, x->id.proto,
2770834c 1122 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1123
c7f5ea3a 1124 __xfrm_state_bump_genids(x);
1da177e4
LT		 1125 __xfrm_state_insert(x);
1126 err = 0;
1127
1128out:
283bc9f3 1129 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1130
1131 if (x1) {
1132 xfrm_state_delete(x1);
1133 xfrm_state_put(x1);
1134 }
1135
37b08e34
DM		 1136 if (to_put)
1137 xfrm_state_put(to_put);
1138
1da177e4
LT		 1139 return err;
1140}
1141EXPORT_SYMBOL(xfrm_state_add);
1142
80c9abaa 1143#ifdef CONFIG_XFRM_MIGRATE
cc9ab60e 1144static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig)
80c9abaa 1145{
98806f75 1146 struct net *net = xs_net(orig);
98806f75 1147 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1148 if (!x)
553f9118 1149 goto out;
80c9abaa
SS		 1150
1151 memcpy(&x->id, &orig->id, sizeof(x->id));
1152 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1153 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1154 x->props.mode = orig->props.mode;
1155 x->props.replay_window = orig->props.replay_window;
1156 x->props.reqid = orig->props.reqid;
1157 x->props.family = orig->props.family;
1158 x->props.saddr = orig->props.saddr;
1159
1160 if (orig->aalg) {
4447bb33 1161 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1162 if (!x->aalg)
1163 goto error;
1164 }
1165 x->props.aalgo = orig->props.aalgo;
1166
ee5c2317
SK		 1167 if (orig->aead) {
1168 x->aead = xfrm_algo_aead_clone(orig->aead);
1169 if (!x->aead)
1170 goto error;
1171 }
80c9abaa
SS		 1172 if (orig->ealg) {
1173 x->ealg = xfrm_algo_clone(orig->ealg);
1174 if (!x->ealg)
1175 goto error;
1176 }
1177 x->props.ealgo = orig->props.ealgo;
1178
1179 if (orig->calg) {
1180 x->calg = xfrm_algo_clone(orig->calg);
1181 if (!x->calg)
1182 goto error;
1183 }
1184 x->props.calgo = orig->props.calgo;
1185
a716c119 1186 if (orig->encap) {
80c9abaa
SS		 1187 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1188 if (!x->encap)
1189 goto error;
1190 }
1191
1192 if (orig->coaddr) {
1193 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1194 GFP_KERNEL);
1195 if (!x->coaddr)
1196 goto error;
1197 }
1198
af2f464e 1199 if (orig->replay_esn) {
cc9ab60e 1200 if (xfrm_replay_clone(x, orig))
af2f464e
SK		 1201 goto error;
1202 }
1203
bd55775c
JHS		 1204 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1205
cc9ab60e 1206 if (xfrm_init_state(x) < 0)
80c9abaa
SS		 1207 goto error;
1208
1209 x->props.flags = orig->props.flags;
a947b0a9 1210 x->props.extra_flags = orig->props.extra_flags;
80c9abaa 1211
ee5c2317
SK		 1212 x->tfcpad = orig->tfcpad;
1213 x->replay_maxdiff = orig->replay_maxdiff;
1214 x->replay_maxage = orig->replay_maxage;
80c9abaa
SS		 1215 x->curlft.add_time = orig->curlft.add_time;
1216 x->km.state = orig->km.state;
1217 x->km.seq = orig->km.seq;
1218
1219 return x;
1220
1221 error:
553f9118
HX		 1222 xfrm_state_put(x);
1223out:
80c9abaa
SS		 1224 return NULL;
1225}
80c9abaa 1226
283bc9f3 1227struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
80c9abaa
SS		 1228{
1229 unsigned int h;
8c0cba22
SK		 1230 struct xfrm_state *x = NULL;
1231
1232 spin_lock_bh(&net->xfrm.xfrm_state_lock);
80c9abaa
SS		 1233
1234 if (m->reqid) {
283bc9f3 1235 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1236 m->reqid, m->old_family);
283bc9f3 1237 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1238 if (x->props.mode != m->mode ||
1239 x->id.proto != m->proto)
1240 continue;
1241 if (m->reqid && x->props.reqid != m->reqid)
1242 continue;
70e94e66
YH		 1243 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1244 m->old_family) ||
1245 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1246 m->old_family))
80c9abaa
SS		 1247 continue;
1248 xfrm_state_hold(x);
8c0cba22 1249 break;
80c9abaa
SS		 1250 }
1251 } else {
283bc9f3 1252 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1253 m->old_family);
283bc9f3 1254 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1255 if (x->props.mode != m->mode ||
1256 x->id.proto != m->proto)
1257 continue;
70e94e66
YH		 1258 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1259 m->old_family) ||
1260 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1261 m->old_family))
80c9abaa
SS		 1262 continue;
1263 xfrm_state_hold(x);
8c0cba22 1264 break;
80c9abaa
SS		 1265 }
1266 }
1267
8c0cba22
SK		 1268 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1269
1270 return x;
80c9abaa
SS		 1271}
1272EXPORT_SYMBOL(xfrm_migrate_state_find);
1273
3e94c2dc
WC		 1274struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1275 struct xfrm_migrate *m)
80c9abaa
SS		 1276{
1277 struct xfrm_state *xc;
80c9abaa 1278
cc9ab60e 1279 xc = xfrm_state_clone(x);
80c9abaa
SS		 1280 if (!xc)
1281 return NULL;
1282
1283 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1284 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1285
1286 /* add state */
70e94e66 1287 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
80c9abaa
SS		 1288 /* a care is needed when the destination address of the
1289 state is to be updated as it is a part of triplet */
1290 xfrm_state_insert(xc);
1291 } else {
cc9ab60e 1292 if (xfrm_state_add(xc) < 0)
80c9abaa
SS		 1293 goto error;
1294 }
1295
1296 return xc;
1297error:
78347c8c 1298 xfrm_state_put(xc);
80c9abaa
SS		 1299 return NULL;
1300}
1301EXPORT_SYMBOL(xfrm_state_migrate);
1302#endif
1303
1da177e4
LT		 1304int xfrm_state_update(struct xfrm_state *x)
1305{
37b08e34 1306 struct xfrm_state *x1, *to_put;
1da177e4 1307 int err;
eb2971b6 1308 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
283bc9f3 1309 struct net *net = xs_net(x);
1da177e4 1310
37b08e34
DM		 1311 to_put = NULL;
1312
283bc9f3 1313 spin_lock_bh(&net->xfrm.xfrm_state_lock);
edcd5821 1314 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1315
1316 err = -ESRCH;
1317 if (!x1)
1318 goto out;
1319
1320 if (xfrm_state_kern(x1)) {
37b08e34 1321 to_put = x1;
1da177e4
LT		 1322 err = -EEXIST;
1323 goto out;
1324 }
1325
1326 if (x1->km.state == XFRM_STATE_ACQ) {
1327 __xfrm_state_insert(x);
1328 x = NULL;
1329 }
1330 err = 0;
1331
1332out:
283bc9f3 1333 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1334
37b08e34
DM		 1335 if (to_put)
1336 xfrm_state_put(to_put);
1337
1da177e4
LT		 1338 if (err)
1339 return err;
1340
1341 if (!x) {
1342 xfrm_state_delete(x1);
1343 xfrm_state_put(x1);
1344 return 0;
1345 }
1346
1347 err = -EINVAL;
1348 spin_lock_bh(&x1->lock);
1349 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1350 if (x->encap && x1->encap)
1351 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
060f02a3
NT		 1352 if (x->coaddr && x1->coaddr) {
1353 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1354 }
1355 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1356 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1357 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1358 x1->km.dying = 0;
1359
9e0d57fd 1360 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1361 if (x1->curlft.use_time)
1362 xfrm_state_check_expire(x1);
1363
1364 err = 0;
8fcbc637
TG		 1365 x->km.state = XFRM_STATE_DEAD;
1366 __xfrm_state_put(x);
1da177e4
LT		 1367 }
1368 spin_unlock_bh(&x1->lock);
1369
1370 xfrm_state_put(x1);
1371
1372 return err;
1373}
1374EXPORT_SYMBOL(xfrm_state_update);
1375
1376int xfrm_state_check_expire(struct xfrm_state *x)
1377{
1378 if (!x->curlft.use_time)
9d729f72 1379 x->curlft.use_time = get_seconds();
1da177e4 1380
1da177e4
LT		 1381 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1382 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1383 x->km.state = XFRM_STATE_EXPIRED;
9b7a787d 1384 tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL);
1da177e4
LT		 1385 return -EINVAL;
1386 }
1387
1388 if (!x->km.dying &&
1389 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1390 x->curlft.packets >= x->lft.soft_packet_limit)) {
1391 x->km.dying = 1;
53bc6b4d 1392 km_state_expired(x, 0, 0);
4666faab 1393 }
1da177e4
LT		 1394 return 0;
1395}
1396EXPORT_SYMBOL(xfrm_state_check_expire);
1397
1da177e4 1398struct xfrm_state *
a70486f0 1399xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
bd55775c 1400 u8 proto, unsigned short family)
1da177e4
LT		 1401{
1402 struct xfrm_state *x;
1da177e4 1403
283bc9f3 1404 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1405 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
283bc9f3 1406 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1407 return x;
1408}
1409EXPORT_SYMBOL(xfrm_state_lookup);
1410
1411struct xfrm_state *
bd55775c 1412xfrm_state_lookup_byaddr(struct net *net, u32 mark,
a70486f0 1413 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
eb2971b6
MN		 1414 u8 proto, unsigned short family)
1415{
1416 struct xfrm_state *x;
eb2971b6 1417
283bc9f3 1418 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1419 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
283bc9f3 1420 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
eb2971b6
MN		 1421 return x;
1422}
1423EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1424
1425struct xfrm_state *
e473fcb4
MK		 1426xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1427 u8 proto, const xfrm_address_t *daddr,
1428 const xfrm_address_t *saddr, int create, unsigned short family)
1da177e4
LT		 1429{
1430 struct xfrm_state *x;
1da177e4 1431
283bc9f3 1432 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1433 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
283bc9f3 1434 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2770834c 1435
1da177e4
LT		 1436 return x;
1437}
1438EXPORT_SYMBOL(xfrm_find_acq);
1439
41a49cc3
MN		 1440#ifdef CONFIG_XFRM_SUB_POLICY
1441int
1442xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
283bc9f3 1443 unsigned short family, struct net *net)
41a49cc3
MN		 1444{
1445 int err = 0;
1446 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1447 if (!afinfo)
1448 return -EAFNOSUPPORT;
1449
283bc9f3 1450 spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/
41a49cc3
MN		 1451 if (afinfo->tmpl_sort)
1452 err = afinfo->tmpl_sort(dst, src, n);
283bc9f3 1453 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1454 xfrm_state_put_afinfo(afinfo);
1455 return err;
1456}
1457EXPORT_SYMBOL(xfrm_tmpl_sort);
1458
1459int
1460xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1461 unsigned short family)
1462{
1463 int err = 0;
1464 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
35ea790d 1465 struct net *net = xs_net(*src);
283bc9f3 1466
41a49cc3
MN		 1467 if (!afinfo)
1468 return -EAFNOSUPPORT;
1469
283bc9f3 1470 spin_lock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1471 if (afinfo->state_sort)
1472 err = afinfo->state_sort(dst, src, n);
283bc9f3 1473 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
41a49cc3
MN		 1474 xfrm_state_put_afinfo(afinfo);
1475 return err;
1476}
1477EXPORT_SYMBOL(xfrm_state_sort);
1478#endif
1479
1da177e4
LT		 1480/* Silly enough, but I'm lazy to build resolution list */
1481
bd55775c 1482static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1483{
1484 int i;
1da177e4 1485
5447c5e4 1486 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37
DM		 1487 struct xfrm_state *x;
1488
b67bfe0d 1489 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
8f126e37 1490 if (x->km.seq == seq &&
3d6acfa7 1491 (mark & x->mark.m) == x->mark.v &&
8f126e37 1492 x->km.state == XFRM_STATE_ACQ) {
1da177e4
LT		 1493 xfrm_state_hold(x);
1494 return x;
1495 }
1496 }
1497 }
1498 return NULL;
1499}
1500
bd55775c 1501struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1502{
1503 struct xfrm_state *x;
1504
283bc9f3 1505 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1506 x = __xfrm_find_acq_byseq(net, mark, seq);
283bc9f3 1507 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1508 return x;
1509}
1510EXPORT_SYMBOL(xfrm_find_acq_byseq);
1511
1512u32 xfrm_get_acqseq(void)
1513{
1514 u32 res;
6836b9bd 1515 static atomic_t acqseq;
1516
1517 do {
1518 res = atomic_inc_return(&acqseq);
1519 } while (!res);
1da177e4 1520
1da177e4
LT		 1521 return res;
1522}
1523EXPORT_SYMBOL(xfrm_get_acqseq);
1524
776e9dd9
FD		 1525int verify_spi_info(u8 proto, u32 min, u32 max)
1526{
1527 switch (proto) {
1528 case IPPROTO_AH:
1529 case IPPROTO_ESP:
1530 break;
1531
1532 case IPPROTO_COMP:
1533 /* IPCOMP spi is 16-bits. */
1534 if (max >= 0x10000)
1535 return -EINVAL;
1536 break;
1537
1538 default:
1539 return -EINVAL;
1540 }
1541
1542 if (min > max)
1543 return -EINVAL;
1544
1545 return 0;
1546}
1547EXPORT_SYMBOL(verify_spi_info);
1548
658b219e 1549int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 1550{
221df1ed 1551 struct net *net = xs_net(x);
f034b5d4 1552 unsigned int h;
1da177e4 1553 struct xfrm_state *x0;
658b219e
HX		 1554 int err = -ENOENT;
1555 __be32 minspi = htonl(low);
1556 __be32 maxspi = htonl(high);
bd55775c 1557 u32 mark = x->mark.v & x->mark.m;
1da177e4 1558
658b219e
HX		 1559 spin_lock_bh(&x->lock);
1560 if (x->km.state == XFRM_STATE_DEAD)
1561 goto unlock;
1562
1563 err = 0;
1da177e4 1564 if (x->id.spi)
658b219e
HX		 1565 goto unlock;
1566
1567 err = -ENOENT;
1da177e4
LT		 1568
1569 if (minspi == maxspi) {
bd55775c 1570 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 1571 if (x0) {
1572 xfrm_state_put(x0);
658b219e 1573 goto unlock;
1da177e4
LT		 1574 }
1575 x->id.spi = minspi;
1576 } else {
1577 u32 spi = 0;
9b7a787d 1578 for (h = 0; h < high-low+1; h++) {
63862b5b 1579 spi = low + prandom_u32()%(high-low+1);
bd55775c 1580 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4
LT		 1581 if (x0 == NULL) {
1582 x->id.spi = htonl(spi);
1583 break;
1584 }
1585 xfrm_state_put(x0);
1586 }
1587 }
1588 if (x->id.spi) {
283bc9f3 1589 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12604d8a
AD		 1590 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1591 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
283bc9f3 1592 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
658b219e
HX		 1593
1594 err = 0;
1da177e4 1595 }
658b219e
HX		 1596
1597unlock:
1598 spin_unlock_bh(&x->lock);
1599
1600 return err;
1da177e4
LT		 1601}
1602EXPORT_SYMBOL(xfrm_alloc_spi);
1603
d3623099 1604static bool __xfrm_state_filter_match(struct xfrm_state *x,
870a2df4 1605 struct xfrm_address_filter *filter)
d3623099
ND		 1606{
1607 if (filter) {
1608 if ((filter->family == AF_INET ||
1609 filter->family == AF_INET6) &&
1610 x->props.family != filter->family)
1611 return false;
1612
1613 return addr_match(&x->props.saddr, &filter->saddr,
1614 filter->splen) &&
1615 addr_match(&x->id.daddr, &filter->daddr,
1616 filter->dplen);
1617 }
1618 return true;
1619}
1620
284fa7da 1621int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 1622 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 1623 void *data)
1624{
12a169e7
HX		 1625 struct xfrm_state *state;
1626 struct xfrm_state_walk *x;
1da177e4
LT		 1627 int err = 0;
1628
12a169e7 1629 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 1630 return 0;
1631
283bc9f3 1632 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 1633 if (list_empty(&walk->all))
284fa7da 1634 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7
HX		 1635 else
1636 x = list_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 1637 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 1638 if (x->state == XFRM_STATE_DEAD)
4c563f76 1639 continue;
12a169e7
HX		 1640 state = container_of(x, struct xfrm_state, km);
1641 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 1642 continue;
d3623099
ND		 1643 if (!__xfrm_state_filter_match(state, walk->filter))
1644 continue;
12a169e7
HX		 1645 err = func(state, walk->seq, data);
1646 if (err) {
1647 list_move_tail(&walk->all, &x->all);
1648 goto out;
1da177e4 1649 }
12a169e7 1650 walk->seq++;
1da177e4 1651 }
12a169e7 1652 if (walk->seq == 0) {
1da177e4
LT		 1653 err = -ENOENT;
1654 goto out;
1655 }
12a169e7 1656 list_del_init(&walk->all);
1da177e4 1657out:
283bc9f3 1658 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1659 return err;
1660}
1661EXPORT_SYMBOL(xfrm_state_walk);
1662
d3623099 1663void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
870a2df4 1664 struct xfrm_address_filter *filter)
5c182458 1665{
12a169e7 1666 INIT_LIST_HEAD(&walk->all);
5c182458 1667 walk->proto = proto;
12a169e7
HX		 1668 walk->state = XFRM_STATE_DEAD;
1669 walk->seq = 0;
d3623099 1670 walk->filter = filter;
5c182458
HX		 1671}
1672EXPORT_SYMBOL(xfrm_state_walk_init);
1673
283bc9f3 1674void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
abb81c4f 1675{
d3623099
ND		 1676 kfree(walk->filter);
1677
12a169e7 1678 if (list_empty(&walk->all))
5c182458 1679 return;
5c182458 1680
283bc9f3 1681 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 1682 list_del(&walk->all);
283bc9f3 1683 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
abb81c4f
HX		 1684}
1685EXPORT_SYMBOL(xfrm_state_walk_done);
1686
f8cd5488
JHS		 1687static void xfrm_replay_timer_handler(unsigned long data)
1688{
3e94c2dc 1689 struct xfrm_state *x = (struct xfrm_state *)data;
f8cd5488
JHS		 1690
1691 spin_lock(&x->lock);
1692
2717096a 1693 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 1694 if (xfrm_aevent_is_on(xs_net(x)))
9fdc4883 1695 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
2717096a
JHS		 1696 else
1697 x->xflags |= XFRM_TIME_DEFER;
1698 }
f8cd5488
JHS		 1699
1700 spin_unlock(&x->lock);
1701}
1702
df01812e 1703static LIST_HEAD(xfrm_km_list);
1da177e4 1704
214e005b 1705void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4
LT		 1706{
1707 struct xfrm_mgr *km;
1708
85168c00
CW		 1709 rcu_read_lock();
1710 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 1711 if (km->notify_policy)
1712 km->notify_policy(xp, dir, c);
85168c00 1713 rcu_read_unlock();
26b15dad 1714}
1da177e4 1715
214e005b 1716void km_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1717{
1718 struct xfrm_mgr *km;
85168c00
CW		 1719 rcu_read_lock();
1720 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 1721 if (km->notify)
1722 km->notify(x, c);
85168c00 1723 rcu_read_unlock();
26b15dad
JHS		 1724}
1725
1726EXPORT_SYMBOL(km_policy_notify);
1727EXPORT_SYMBOL(km_state_notify);
1728
15e47304 1729void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
26b15dad
JHS		 1730{
1731 struct km_event c;
1732
bf08867f 1733 c.data.hard = hard;
15e47304 1734 c.portid = portid;
f60f6b8f 1735 c.event = XFRM_MSG_EXPIRE;
26b15dad 1736 km_state_notify(x, &c);
1da177e4
LT		 1737}
1738
53bc6b4d 1739EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 1740/*
1741 * We send to all registered managers regardless of failure
1742 * We are happy with one success
1743*/
980ebd25 1744int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 1745{
26b15dad 1746 int err = -EINVAL, acqret;
1da177e4
LT		 1747 struct xfrm_mgr *km;
1748
85168c00
CW		 1749 rcu_read_lock();
1750 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
65e0736b 1751 acqret = km->acquire(x, t, pol);
26b15dad
JHS		 1752 if (!acqret)
1753 err = acqret;
1da177e4 1754 }
85168c00 1755 rcu_read_unlock();
1da177e4
LT		 1756 return err;
1757}
980ebd25 1758EXPORT_SYMBOL(km_query);
1da177e4 1759
5d36b180 1760int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 1761{
1762 int err = -EINVAL;
1763 struct xfrm_mgr *km;
1764
85168c00
CW		 1765 rcu_read_lock();
1766 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1da177e4
LT		 1767 if (km->new_mapping)
1768 err = km->new_mapping(x, ipaddr, sport);
1769 if (!err)
1770 break;
1771 }
85168c00 1772 rcu_read_unlock();
1da177e4
LT		 1773 return err;
1774}
1775EXPORT_SYMBOL(km_new_mapping);
1776
15e47304 1777void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1da177e4 1778{
26b15dad 1779 struct km_event c;
1da177e4 1780
bf08867f 1781 c.data.hard = hard;
15e47304 1782 c.portid = portid;
f60f6b8f 1783 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 1784 km_policy_notify(pol, dir, &c);
1da177e4 1785}
a70fcb0b 1786EXPORT_SYMBOL(km_policy_expired);
1da177e4 1787
2d60abc2 1788#ifdef CONFIG_XFRM_MIGRATE
183cad12
DM		 1789int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1790 const struct xfrm_migrate *m, int num_migrate,
1791 const struct xfrm_kmaddress *k)
80c9abaa
SS		 1792{
1793 int err = -EINVAL;
1794 int ret;
1795 struct xfrm_mgr *km;
1796
85168c00
CW		 1797 rcu_read_lock();
1798 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
80c9abaa 1799 if (km->migrate) {
13c1d189 1800 ret = km->migrate(sel, dir, type, m, num_migrate, k);
80c9abaa
SS		 1801 if (!ret)
1802 err = ret;
1803 }
1804 }
85168c00 1805 rcu_read_unlock();
80c9abaa
SS		 1806 return err;
1807}
1808EXPORT_SYMBOL(km_migrate);
2d60abc2 1809#endif
80c9abaa 1810
db983c11 1811int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 1812{
1813 int err = -EINVAL;
1814 int ret;
1815 struct xfrm_mgr *km;
1816
85168c00
CW		 1817 rcu_read_lock();
1818 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
97a64b45 1819 if (km->report) {
db983c11 1820 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 1821 if (!ret)
1822 err = ret;
1823 }
1824 }
85168c00 1825 rcu_read_unlock();
97a64b45
MN		 1826 return err;
1827}
1828EXPORT_SYMBOL(km_report);
1829
0f24558e
HG		 1830bool km_is_alive(const struct km_event *c)
1831{
1832 struct xfrm_mgr *km;
1833 bool is_alive = false;
1834
1835 rcu_read_lock();
1836 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1837 if (km->is_alive && km->is_alive(c)) {
1838 is_alive = true;
1839 break;
1840 }
1841 }
1842 rcu_read_unlock();
1843
1844 return is_alive;
1845}
1846EXPORT_SYMBOL(km_is_alive);
1847
1da177e4
LT		 1848int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1849{
1850 int err;
1851 u8 *data;
1852 struct xfrm_mgr *km;
1853 struct xfrm_policy *pol = NULL;
1854
1855 if (optlen <= 0 || optlen > PAGE_SIZE)
1856 return -EMSGSIZE;
1857
1858 data = kmalloc(optlen, GFP_KERNEL);
1859 if (!data)
1860 return -ENOMEM;
1861
1862 err = -EFAULT;
1863 if (copy_from_user(data, optval, optlen))
1864 goto out;
1865
1866 err = -EINVAL;
85168c00
CW		 1867 rcu_read_lock();
1868 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
cb969f07 1869 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 1870 optlen, &err);
1871 if (err >= 0)
1872 break;
1873 }
85168c00 1874 rcu_read_unlock();
1da177e4
LT		 1875
1876 if (err >= 0) {
1877 xfrm_sk_policy_insert(sk, err, pol);
1878 xfrm_pol_put(pol);
1879 err = 0;
1880 }
1881
1882out:
1883 kfree(data);
1884 return err;
1885}
1886EXPORT_SYMBOL(xfrm_user_policy);
1887
85168c00
CW		 1888static DEFINE_SPINLOCK(xfrm_km_lock);
1889
1da177e4
LT		 1890int xfrm_register_km(struct xfrm_mgr *km)
1891{
85168c00
CW		 1892 spin_lock_bh(&xfrm_km_lock);
1893 list_add_tail_rcu(&km->list, &xfrm_km_list);
1894 spin_unlock_bh(&xfrm_km_lock);
1da177e4
LT		 1895 return 0;
1896}
1897EXPORT_SYMBOL(xfrm_register_km);
1898
1899int xfrm_unregister_km(struct xfrm_mgr *km)
1900{
85168c00
CW		 1901 spin_lock_bh(&xfrm_km_lock);
1902 list_del_rcu(&km->list);
1903 spin_unlock_bh(&xfrm_km_lock);
1904 synchronize_rcu();
1da177e4
LT		 1905 return 0;
1906}
1907EXPORT_SYMBOL(xfrm_unregister_km);
1908
1909int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1910{
1911 int err = 0;
1912 if (unlikely(afinfo == NULL))
1913 return -EINVAL;
1914 if (unlikely(afinfo->family >= NPROTO))
1915 return -EAFNOSUPPORT;
44abdc30 1916 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1917 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1918 err = -ENOBUFS;
edcd5821 1919 else
44abdc30
CW		 1920 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
1921 spin_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1922 return err;
1923}
1924EXPORT_SYMBOL(xfrm_state_register_afinfo);
1925
1926int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1927{
1928 int err = 0;
1929 if (unlikely(afinfo == NULL))
1930 return -EINVAL;
1931 if (unlikely(afinfo->family >= NPROTO))
1932 return -EAFNOSUPPORT;
44abdc30 1933 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 1934 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1935 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1936 err = -EINVAL;
edcd5821 1937 else
44abdc30 1938 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1da177e4 1939 }
44abdc30
CW		 1940 spin_unlock_bh(&xfrm_state_afinfo_lock);
1941 synchronize_rcu();
1da177e4
LT		 1942 return err;
1943}
1944EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1945
628e341f 1946struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 1947{
1948 struct xfrm_state_afinfo *afinfo;
1949 if (unlikely(family >= NPROTO))
1950 return NULL;
44abdc30
CW		 1951 rcu_read_lock();
1952 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
546be240 1953 if (unlikely(!afinfo))
44abdc30 1954 rcu_read_unlock();
1da177e4
LT		 1955 return afinfo;
1956}
1957
628e341f 1958void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
1da177e4 1959{
44abdc30 1960 rcu_read_unlock();
1da177e4
LT		 1961}
1962
1963/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1964void xfrm_state_delete_tunnel(struct xfrm_state *x)
1965{
1966 if (x->tunnel) {
1967 struct xfrm_state *t = x->tunnel;
1968
1969 if (atomic_read(&t->tunnel_users) == 2)
1970 xfrm_state_delete(t);
1971 atomic_dec(&t->tunnel_users);
1972 xfrm_state_put(t);
1973 x->tunnel = NULL;
1974 }
1975}
1976EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1977
1978int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1979{
c5c25238 1980 int res;
1da177e4 1981
c5c25238
PM		 1982 spin_lock_bh(&x->lock);
1983 if (x->km.state == XFRM_STATE_VALID &&
1984 x->type && x->type->get_mtu)
1985 res = x->type->get_mtu(x, mtu);
1986 else
28121617 1987 res = mtu - x->props.header_len;
c5c25238 1988 spin_unlock_bh(&x->lock);
1da177e4
LT		 1989 return res;
1990}
1991
a454f0cc 1992int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
72cb6962 1993{
d094cd83 1994 struct xfrm_state_afinfo *afinfo;
df9dcb45 1995 struct xfrm_mode *inner_mode;
d094cd83 1996 int family = x->props.family;
72cb6962
HX		 1997 int err;
1998
d094cd83
HX		 1999 err = -EAFNOSUPPORT;
2000 afinfo = xfrm_state_get_afinfo(family);
2001 if (!afinfo)
2002 goto error;
2003
2004 err = 0;
2005 if (afinfo->init_flags)
2006 err = afinfo->init_flags(x);
2007
2008 xfrm_state_put_afinfo(afinfo);
2009
2010 if (err)
2011 goto error;
2012
2013 err = -EPROTONOSUPPORT;
13996378 2014
df9dcb45
KM		 2015 if (x->sel.family != AF_UNSPEC) {
2016 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2017 if (inner_mode == NULL)
2018 goto error;
2019
2020 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
2021 family != x->sel.family) {
2022 xfrm_put_mode(inner_mode);
2023 goto error;
2024 }
2025
2026 x->inner_mode = inner_mode;
2027 } else {
2028 struct xfrm_mode *inner_mode_iaf;
d81d2285 2029 int iafamily = AF_INET;
df9dcb45 2030
d81d2285 2031 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2032 if (inner_mode == NULL)
2033 goto error;
2034
2035 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
2036 xfrm_put_mode(inner_mode);
2037 goto error;
2038 }
d81d2285 2039 x->inner_mode = inner_mode;
df9dcb45 2040
d81d2285
MW		 2041 if (x->props.family == AF_INET)
2042 iafamily = AF_INET6;
df9dcb45 2043
d81d2285
MW		 2044 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2045 if (inner_mode_iaf) {
2046 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
2047 x->inner_mode_iaf = inner_mode_iaf;
2048 else
2049 xfrm_put_mode(inner_mode_iaf);
df9dcb45
KM		 2050 }
2051 }
13996378 2052
d094cd83 2053 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2054 if (x->type == NULL)
2055 goto error;
2056
2057 err = x->type->init_state(x);
2058 if (err)
2059 goto error;
2060
13996378 2061 x->outer_mode = xfrm_get_mode(x->props.mode, family);
599901c3
JL		 2062 if (x->outer_mode == NULL) {
2063 err = -EPROTONOSUPPORT;
b59f45d0 2064 goto error;
599901c3 2065 }
b59f45d0 2066
a454f0cc
WY		 2067 if (init_replay) {
2068 err = xfrm_init_replay(x);
2069 if (err)
2070 goto error;
2071 }
2072
72cb6962
HX		 2073 x->km.state = XFRM_STATE_VALID;
2074
2075error:
2076 return err;
2077}
2078
a454f0cc
WY		 2079EXPORT_SYMBOL(__xfrm_init_state);
2080
2081int xfrm_init_state(struct xfrm_state *x)
2082{
2083 return __xfrm_init_state(x, true);
2084}
2085
72cb6962 2086EXPORT_SYMBOL(xfrm_init_state);
a716c119 2087
d62ddc21 2088int __net_init xfrm_state_init(struct net *net)
1da177e4 2089{
f034b5d4
DM		 2090 unsigned int sz;
2091
9d4139c7
AD		 2092 INIT_LIST_HEAD(&net->xfrm.state_all);
2093
f034b5d4
DM		 2094 sz = sizeof(struct hlist_head) * 8;
2095
73d189dc
AD		 2096 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2097 if (!net->xfrm.state_bydst)
2098 goto out_bydst;
d320bbb3
AD		 2099 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2100 if (!net->xfrm.state_bysrc)
2101 goto out_bysrc;
b754a4fd
AD		 2102 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2103 if (!net->xfrm.state_byspi)
2104 goto out_byspi;
529983ec 2105 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2106
0bf7c5b0 2107 net->xfrm.state_num = 0;
63082733 2108 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
b8a0ae20 2109 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
c7837144 2110 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
283bc9f3 2111 spin_lock_init(&net->xfrm.xfrm_state_lock);
d62ddc21 2112 return 0;
73d189dc 2113
b754a4fd
AD		 2114out_byspi:
2115 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2116out_bysrc:
2117 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2118out_bydst:
2119 return -ENOMEM;
d62ddc21
AD		 2120}
2121
2122void xfrm_state_fini(struct net *net)
2123{
73d189dc
AD		 2124 unsigned int sz;
2125
7c2776ee 2126 flush_work(&net->xfrm.state_hash_work);
2e71029e 2127 xfrm_state_flush(net, IPSEC_PROTO_ANY, false);
7c2776ee
AD		 2128 flush_work(&net->xfrm.state_gc_work);
2129
9d4139c7 2130 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2131
529983ec 2132 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
b754a4fd
AD		 2133 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2134 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2135 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2136 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2137 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2138 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2139}
2140
ab5f5e8b 2141#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2142static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2143 struct audit_buffer *audit_buf)
ab5f5e8b 2144{
68277acc
PM		 2145 struct xfrm_sec_ctx *ctx = x->security;
2146 u32 spi = ntohl(x->id.spi);
2147
2148 if (ctx)
ab5f5e8b 2149 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2150 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b 2151
9b7a787d 2152 switch (x->props.family) {
ab5f5e8b 2153 case AF_INET:
21454aaa
HH		 2154 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2155 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2156 break;
2157 case AF_INET6:
5b095d98 2158 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2159 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2160 break;
2161 }
68277acc
PM		 2162
2163 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2164}
2165
cf35f43e
IJ		 2166static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2167 struct audit_buffer *audit_buf)
afeb14b4 2168{
b71d1d42
ED		 2169 const struct iphdr *iph4;
2170 const struct ipv6hdr *iph6;
afeb14b4
PM		 2171
2172 switch (family) {
2173 case AF_INET:
2174 iph4 = ip_hdr(skb);
21454aaa
HH		 2175 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2176 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2177 break;
2178 case AF_INET6:
2179 iph6 = ipv6_hdr(skb);
2180 audit_log_format(audit_buf,
5b095d98 2181 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
9b7a787d 2182 &iph6->saddr, &iph6->daddr,
afeb14b4
PM		 2183 iph6->flow_lbl[0] & 0x0f,
2184 iph6->flow_lbl[1],
2185 iph6->flow_lbl[2]);
2186 break;
2187 }
2188}
2189
2e71029e 2190void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 2191{
2192 struct audit_buffer *audit_buf;
ab5f5e8b 2193
afeb14b4 2194 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2195 if (audit_buf == NULL)
2196 return;
2e71029e 2197 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 2198 xfrm_audit_helper_sainfo(x, audit_buf);
2199 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2200 audit_log_end(audit_buf);
2201}
2202EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2203
2e71029e 2204void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 2205{
2206 struct audit_buffer *audit_buf;
ab5f5e8b 2207
afeb14b4 2208 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2209 if (audit_buf == NULL)
2210 return;
2e71029e 2211 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 2212 xfrm_audit_helper_sainfo(x, audit_buf);
2213 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2214 audit_log_end(audit_buf);
2215}
2216EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2217
2218void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2219 struct sk_buff *skb)
2220{
2221 struct audit_buffer *audit_buf;
2222 u32 spi;
2223
2224 audit_buf = xfrm_audit_start("SA-replay-overflow");
2225 if (audit_buf == NULL)
2226 return;
2227 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2228 /* don't record the sequence number because it's inherent in this kind
2229 * of audit message */
2230 spi = ntohl(x->id.spi);
2231 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2232 audit_log_end(audit_buf);
2233}
2234EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2235
9fdc4883 2236void xfrm_audit_state_replay(struct xfrm_state *x,
afeb14b4
PM		 2237 struct sk_buff *skb, __be32 net_seq)
2238{
2239 struct audit_buffer *audit_buf;
2240 u32 spi;
2241
2242 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2243 if (audit_buf == NULL)
2244 return;
2245 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2246 spi = ntohl(x->id.spi);
2247 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2248 spi, spi, ntohl(net_seq));
2249 audit_log_end(audit_buf);
2250}
9fdc4883 2251EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
afeb14b4
PM		 2252
2253void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2254{
2255 struct audit_buffer *audit_buf;
2256
2257 audit_buf = xfrm_audit_start("SA-notfound");
2258 if (audit_buf == NULL)
2259 return;
2260 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2261 audit_log_end(audit_buf);
2262}
2263EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2264
2265void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2266 __be32 net_spi, __be32 net_seq)
2267{
2268 struct audit_buffer *audit_buf;
2269 u32 spi;
2270
2271 audit_buf = xfrm_audit_start("SA-notfound");
2272 if (audit_buf == NULL)
2273 return;
2274 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2275 spi = ntohl(net_spi);
2276 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2277 spi, spi, ntohl(net_seq));
2278 audit_log_end(audit_buf);
2279}
2280EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2281
2282void xfrm_audit_state_icvfail(struct xfrm_state *x,
2283 struct sk_buff *skb, u8 proto)
2284{
2285 struct audit_buffer *audit_buf;
2286 __be32 net_spi;
2287 __be32 net_seq;
2288
2289 audit_buf = xfrm_audit_start("SA-icv-failure");
2290 if (audit_buf == NULL)
2291 return;
2292 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2293 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2294 u32 spi = ntohl(net_spi);
2295 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2296 spi, spi, ntohl(net_seq));
2297 }
2298 audit_log_end(audit_buf);
2299}
2300EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2301#endif /* CONFIG_AUDITSYSCALL */
Linux kernel - Deliverables
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