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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux.git] / net / xfrm / xfrm_state.c
CommitLineData
457c8996 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/*
3 * xfrm_state.c
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <[email protected]>
9 * IPv6 support
10 * YOSHIFUJI Hideaki @USAGI
11 * Split up af-specific functions
12 * Derek Atkins <[email protected]>
13 * Add UDP Encapsulation
df71837d 14 *
1da177e4
LT		 15 */
16
17#include <linux/workqueue.h>
18#include <net/xfrm.h>
19#include <linux/pfkeyv2.h>
20#include <linux/ipsec.h>
21#include <linux/module.h>
f034b5d4 22#include <linux/cache.h>
68277acc 23#include <linux/audit.h>
7c0f6ba6 24#include <linux/uaccess.h>
9e0d57fd 25#include <linux/ktime.h>
5a0e3ad6 26#include <linux/slab.h>
9e0d57fd
YP		 27#include <linux/interrupt.h>
28#include <linux/kernel.h>
1da177e4 29
c7b37c76
FW		 30#include <crypto/aead.h>
31
44e36b42
DM		 32#include "xfrm_hash.h"
33
c8406998
FW		 34#define xfrm_state_deref_prot(table, net) \
35 rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
36
35db57bb
FW		 37static void xfrm_state_gc_task(struct work_struct *work);
38
1da177e4
LT		 39/* Each xfrm_state may be linked to two tables:
40
41 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 42 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 43 destination/tunnel endpoint. (output)
44 */
45
f034b5d4 46static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
565f0fa9 47static struct kmem_cache *xfrm_state_cache __ro_after_init;
f034b5d4 48
35db57bb
FW		 49static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task);
50static HLIST_HEAD(xfrm_state_gc_list);
51
02efdff7
FW		 52static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
53{
88755e9c 54 return refcount_inc_not_zero(&x->refcnt);
02efdff7
FW		 55}
56
64d0cd00 57static inline unsigned int xfrm_dst_hash(struct net *net,
2ab38503
DM		 58 const xfrm_address_t *daddr,
59 const xfrm_address_t *saddr,
c1969f29 60 u32 reqid,
a624c108 61 unsigned short family)
f034b5d4 62{
64d0cd00 63 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 64}
65
64d0cd00 66static inline unsigned int xfrm_src_hash(struct net *net,
2ab38503
DM		 67 const xfrm_address_t *daddr,
68 const xfrm_address_t *saddr,
44e36b42 69 unsigned short family)
f034b5d4 70{
64d0cd00 71 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 72}
73
f034b5d4 74static inline unsigned int
2ab38503
DM		 75xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
76 __be32 spi, u8 proto, unsigned short family)
f034b5d4 77{
64d0cd00 78 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 79}
80
fe9f1d87
SD		 81static unsigned int xfrm_seq_hash(struct net *net, u32 seq)
82{
83 return __xfrm_seq_hash(seq, net->xfrm.state_hmask);
84}
85
f034b5d4
DM		 86static void xfrm_hash_transfer(struct hlist_head *list,
87 struct hlist_head *ndsttable,
88 struct hlist_head *nsrctable,
89 struct hlist_head *nspitable,
fe9f1d87 90 struct hlist_head *nseqtable,
f034b5d4
DM		 91 unsigned int nhashmask)
92{
b67bfe0d 93 struct hlist_node *tmp;
f034b5d4
DM		 94 struct xfrm_state *x;
95
b67bfe0d 96 hlist_for_each_entry_safe(x, tmp, list, bydst) {
f034b5d4
DM		 97 unsigned int h;
98
c1969f29
DM		 99 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
100 x->props.reqid, x->props.family,
101 nhashmask);
ae3fb6d3 102 hlist_add_head_rcu(&x->bydst, ndsttable + h);
f034b5d4 103
667bbcb6
MN		 104 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
105 x->props.family,
f034b5d4 106 nhashmask);
ae3fb6d3 107 hlist_add_head_rcu(&x->bysrc, nsrctable + h);
f034b5d4 108
7b4dc360
MN		 109 if (x->id.spi) {
110 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
111 x->id.proto, x->props.family,
112 nhashmask);
ae3fb6d3 113 hlist_add_head_rcu(&x->byspi, nspitable + h);
7b4dc360 114 }
fe9f1d87
SD		 115
116 if (x->km.seq) {
117 h = __xfrm_seq_hash(x->km.seq, nhashmask);
118 hlist_add_head_rcu(&x->byseq, nseqtable + h);
119 }
f034b5d4
DM		 120 }
121}
122
63082733 123static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 124{
63082733 125 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 126}
127
63082733 128static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 129{
63082733 130 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
fe9f1d87 131 struct hlist_head *ndst, *nsrc, *nspi, *nseq, *odst, *osrc, *ospi, *oseq;
f034b5d4
DM		 132 unsigned long nsize, osize;
133 unsigned int nhashmask, ohashmask;
134 int i;
135
63082733 136 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 137 ndst = xfrm_hash_alloc(nsize);
f034b5d4 138 if (!ndst)
0244790c 139 return;
44e36b42 140 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 141 if (!nsrc) {
44e36b42 142 xfrm_hash_free(ndst, nsize);
0244790c 143 return;
f034b5d4 144 }
44e36b42 145 nspi = xfrm_hash_alloc(nsize);
f034b5d4 146 if (!nspi) {
44e36b42
DM		 147 xfrm_hash_free(ndst, nsize);
148 xfrm_hash_free(nsrc, nsize);
0244790c 149 return;
f034b5d4 150 }
fe9f1d87
SD		 151 nseq = xfrm_hash_alloc(nsize);
152 if (!nseq) {
153 xfrm_hash_free(ndst, nsize);
154 xfrm_hash_free(nsrc, nsize);
155 xfrm_hash_free(nspi, nsize);
156 return;
157 }
f034b5d4 158
283bc9f3 159 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e88add19 160 write_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
f034b5d4
DM		 161
162 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
c8406998 163 odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
63082733 164 for (i = net->xfrm.state_hmask; i >= 0; i--)
fe9f1d87 165 xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nseq, nhashmask);
f034b5d4 166
c8406998
FW		 167 osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
168 ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
fe9f1d87 169 oseq = xfrm_state_deref_prot(net->xfrm.state_byseq, net);
63082733 170 ohashmask = net->xfrm.state_hmask;
f034b5d4 171
c8406998
FW		 172 rcu_assign_pointer(net->xfrm.state_bydst, ndst);
173 rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
174 rcu_assign_pointer(net->xfrm.state_byspi, nspi);
fe9f1d87 175 rcu_assign_pointer(net->xfrm.state_byseq, nseq);
63082733 176 net->xfrm.state_hmask = nhashmask;
f034b5d4 177
e88add19 178 write_seqcount_end(&net->xfrm.xfrm_state_hash_generation);
283bc9f3 179 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
f034b5d4
DM		 180
181 osize = (ohashmask + 1) * sizeof(struct hlist_head);
df7274eb
FW		 182
183 synchronize_rcu();
184
44e36b42
DM		 185 xfrm_hash_free(odst, osize);
186 xfrm_hash_free(osrc, osize);
187 xfrm_hash_free(ospi, osize);
fe9f1d87 188 xfrm_hash_free(oseq, osize);
f034b5d4
DM		 189}
190
44abdc30
CW		 191static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
192static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
1da177e4 193
1da177e4
LT		 194static DEFINE_SPINLOCK(xfrm_state_gc_lock);
195
53bc6b4d 196int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 197
980ebd25 198int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
bb9cd077 199static bool km_is_alive(const struct km_event *c);
15e47304 200void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
1da177e4 201
533cb5b0 202int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 203{
7a9885b9 204 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 205 int err = 0;
206
4f518e80 207 if (!afinfo)
aa5d62cc 208 return -EAFNOSUPPORT;
4f518e80
FW		 209
210#define X(afi, T, name) do { \
211 WARN_ON((afi)->type_ ## name); \
212 (afi)->type_ ## name = (T); \
213 } while (0)
214
215 switch (type->proto) {
216 case IPPROTO_COMP:
217 X(afinfo, type, comp);
218 break;
219 case IPPROTO_AH:
220 X(afinfo, type, ah);
221 break;
222 case IPPROTO_ESP:
223 X(afinfo, type, esp);
224 break;
225 case IPPROTO_IPIP:
226 X(afinfo, type, ipip);
227 break;
228 case IPPROTO_DSTOPTS:
229 X(afinfo, type, dstopts);
230 break;
231 case IPPROTO_ROUTING:
232 X(afinfo, type, routing);
233 break;
234 case IPPROTO_IPV6:
235 X(afinfo, type, ipip6);
236 break;
237 default:
238 WARN_ON(1);
239 err = -EPROTONOSUPPORT;
240 break;
241 }
242#undef X
af5d27c4 243 rcu_read_unlock();
aa5d62cc
HX		 244 return err;
245}
246EXPORT_SYMBOL(xfrm_register_type);
247
4f518e80 248void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 249{
7a9885b9 250 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 251
252 if (unlikely(afinfo == NULL))
4f518e80
FW		 253 return;
254
255#define X(afi, T, name) do { \
256 WARN_ON((afi)->type_ ## name != (T)); \
257 (afi)->type_ ## name = NULL; \
258 } while (0)
259
260 switch (type->proto) {
261 case IPPROTO_COMP:
262 X(afinfo, type, comp);
263 break;
264 case IPPROTO_AH:
265 X(afinfo, type, ah);
266 break;
267 case IPPROTO_ESP:
268 X(afinfo, type, esp);
269 break;
270 case IPPROTO_IPIP:
271 X(afinfo, type, ipip);
272 break;
273 case IPPROTO_DSTOPTS:
274 X(afinfo, type, dstopts);
275 break;
276 case IPPROTO_ROUTING:
277 X(afinfo, type, routing);
278 break;
279 case IPPROTO_IPV6:
280 X(afinfo, type, ipip6);
281 break;
282 default:
283 WARN_ON(1);
284 break;
285 }
286#undef X
af5d27c4 287 rcu_read_unlock();
aa5d62cc
HX		 288}
289EXPORT_SYMBOL(xfrm_unregister_type);
290
533cb5b0 291static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc 292{
4f518e80 293 const struct xfrm_type *type = NULL;
aa5d62cc 294 struct xfrm_state_afinfo *afinfo;
aa5d62cc
HX		 295 int modload_attempted = 0;
296
297retry:
298 afinfo = xfrm_state_get_afinfo(family);
299 if (unlikely(afinfo == NULL))
300 return NULL;
aa5d62cc 301
4f518e80
FW		 302 switch (proto) {
303 case IPPROTO_COMP:
304 type = afinfo->type_comp;
305 break;
306 case IPPROTO_AH:
307 type = afinfo->type_ah;
308 break;
309 case IPPROTO_ESP:
310 type = afinfo->type_esp;
311 break;
312 case IPPROTO_IPIP:
313 type = afinfo->type_ipip;
314 break;
315 case IPPROTO_DSTOPTS:
316 type = afinfo->type_dstopts;
317 break;
318 case IPPROTO_ROUTING:
319 type = afinfo->type_routing;
320 break;
321 case IPPROTO_IPV6:
322 type = afinfo->type_ipip6;
323 break;
324 default:
325 break;
326 }
327
aa5d62cc
HX		 328 if (unlikely(type && !try_module_get(type->owner)))
329 type = NULL;
75cda62d
FW		 330
331 rcu_read_unlock();
332
aa5d62cc 333 if (!type && !modload_attempted) {
aa5d62cc
HX		 334 request_module("xfrm-type-%d-%d", family, proto);
335 modload_attempted = 1;
336 goto retry;
337 }
338
aa5d62cc
HX		 339 return type;
340}
341
533cb5b0 342static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 343{
344 module_put(type->owner);
345}
346
9d389d7f
SK		 347int xfrm_register_type_offload(const struct xfrm_type_offload *type,
348 unsigned short family)
349{
350 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
9d389d7f
SK		 351 int err = 0;
352
353 if (unlikely(afinfo == NULL))
354 return -EAFNOSUPPORT;
4f518e80
FW		 355
356 switch (type->proto) {
357 case IPPROTO_ESP:
358 WARN_ON(afinfo->type_offload_esp);
359 afinfo->type_offload_esp = type;
360 break;
361 default:
362 WARN_ON(1);
363 err = -EPROTONOSUPPORT;
364 break;
365 }
366
9d389d7f
SK		 367 rcu_read_unlock();
368 return err;
369}
370EXPORT_SYMBOL(xfrm_register_type_offload);
371
4f518e80
FW		 372void xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
373 unsigned short family)
9d389d7f
SK		 374{
375 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
9d389d7f
SK		 376
377 if (unlikely(afinfo == NULL))
4f518e80
FW		 378 return;
379
380 switch (type->proto) {
381 case IPPROTO_ESP:
382 WARN_ON(afinfo->type_offload_esp != type);
383 afinfo->type_offload_esp = NULL;
384 break;
385 default:
386 WARN_ON(1);
387 break;
388 }
9d389d7f 389 rcu_read_unlock();
9d389d7f
SK		 390}
391EXPORT_SYMBOL(xfrm_unregister_type_offload);
392
ffdb5211
IT		 393static const struct xfrm_type_offload *
394xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
9d389d7f 395{
4f518e80 396 const struct xfrm_type_offload *type = NULL;
9d389d7f 397 struct xfrm_state_afinfo *afinfo;
9d389d7f 398
ffdb5211 399retry:
9d389d7f
SK		 400 afinfo = xfrm_state_get_afinfo(family);
401 if (unlikely(afinfo == NULL))
402 return NULL;
9d389d7f 403
4f518e80
FW		 404 switch (proto) {
405 case IPPROTO_ESP:
406 type = afinfo->type_offload_esp;
407 break;
408 default:
409 break;
410 }
411
9d389d7f
SK		 412 if ((type && !try_module_get(type->owner)))
413 type = NULL;
414
2f10a61c
SD		 415 rcu_read_unlock();
416
ffdb5211
IT		 417 if (!type && try_load) {
418 request_module("xfrm-offload-%d-%d", family, proto);
545d8ae7 419 try_load = false;
ffdb5211
IT		 420 goto retry;
421 }
422
9d389d7f
SK		 423 return type;
424}
425
426static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
427{
428 module_put(type->owner);
429}
430
4c145dce
FW		 431static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
432 [XFRM_MODE_BEET] = {
433 .encap = XFRM_MODE_BEET,
434 .flags = XFRM_MODE_FLAG_TUNNEL,
435 .family = AF_INET,
436 },
437 [XFRM_MODE_TRANSPORT] = {
438 .encap = XFRM_MODE_TRANSPORT,
439 .family = AF_INET,
440 },
441 [XFRM_MODE_TUNNEL] = {
442 .encap = XFRM_MODE_TUNNEL,
443 .flags = XFRM_MODE_FLAG_TUNNEL,
444 .family = AF_INET,
445 },
446};
447
448static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
449 [XFRM_MODE_BEET] = {
450 .encap = XFRM_MODE_BEET,
451 .flags = XFRM_MODE_FLAG_TUNNEL,
452 .family = AF_INET6,
453 },
454 [XFRM_MODE_ROUTEOPTIMIZATION] = {
455 .encap = XFRM_MODE_ROUTEOPTIMIZATION,
456 .family = AF_INET6,
457 },
458 [XFRM_MODE_TRANSPORT] = {
459 .encap = XFRM_MODE_TRANSPORT,
460 .family = AF_INET6,
461 },
462 [XFRM_MODE_TUNNEL] = {
463 .encap = XFRM_MODE_TUNNEL,
464 .flags = XFRM_MODE_FLAG_TUNNEL,
465 .family = AF_INET6,
466 },
467};
468
469static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
470{
471 const struct xfrm_mode *mode;
aa5d62cc
HX		 472
473 if (unlikely(encap >= XFRM_MODE_MAX))
474 return NULL;
475
4c145dce
FW		 476 switch (family) {
477 case AF_INET:
478 mode = &xfrm4_mode_map[encap];
479 if (mode->family == family)
480 return mode;
481 break;
482 case AF_INET6:
483 mode = &xfrm6_mode_map[encap];
484 if (mode->family == family)
485 return mode;
486 break;
487 default:
488 break;
aa5d62cc
HX		 489 }
490
4c145dce 491 return NULL;
aa5d62cc
HX		 492}
493
4a135e53
MK		 494void xfrm_state_free(struct xfrm_state *x)
495{
496 kmem_cache_free(xfrm_state_cache, x);
497}
498EXPORT_SYMBOL(xfrm_state_free);
499
f75a2804 500static void ___xfrm_state_destroy(struct xfrm_state *x)
1da177e4 501{
671422b2 502 hrtimer_cancel(&x->mtimer);
a47f0ce0 503 del_timer_sync(&x->rtimer);
b5884793 504 kfree(x->aead);
a51482bd
JJ		 505 kfree(x->aalg);
506 kfree(x->ealg);
507 kfree(x->calg);
508 kfree(x->encap);
060f02a3 509 kfree(x->coaddr);
d8647b79
SK		 510 kfree(x->replay_esn);
511 kfree(x->preplay_esn);
9d389d7f
SK		 512 if (x->type_offload)
513 xfrm_put_type_offload(x->type_offload);
1da177e4
LT		 514 if (x->type) {
515 x->type->destructor(x);
516 xfrm_put_type(x->type);
517 }
86c6739e
SK		 518 if (x->xfrag.page)
519 put_page(x->xfrag.page);
d77e38e6 520 xfrm_dev_state_free(x);
df71837d 521 security_xfrm_state_free(x);
4a135e53 522 xfrm_state_free(x);
1da177e4
LT		 523}
524
c7837144 525static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 526{
12a169e7 527 struct xfrm_state *x;
b67bfe0d 528 struct hlist_node *tmp;
12a169e7 529 struct hlist_head gc_list;
1da177e4 530
1da177e4 531 spin_lock_bh(&xfrm_state_gc_lock);
35db57bb 532 hlist_move_list(&xfrm_state_gc_list, &gc_list);
1da177e4
LT		 533 spin_unlock_bh(&xfrm_state_gc_lock);
534
df7274eb
FW		 535 synchronize_rcu();
536
b67bfe0d 537 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
f75a2804 538 ___xfrm_state_destroy(x);
1da177e4
LT		 539}
540
3e94c2dc 541static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
1da177e4 542{
671422b2
TG		 543 struct xfrm_state *x = container_of(me, struct xfrm_state, mtimer);
544 enum hrtimer_restart ret = HRTIMER_NORESTART;
386c5680
AB		 545 time64_t now = ktime_get_real_seconds();
546 time64_t next = TIME64_MAX;
1da177e4 547 int warn = 0;
161a09e7 548 int err = 0;
1da177e4
LT		 549
550 spin_lock(&x->lock);
551 if (x->km.state == XFRM_STATE_DEAD)
552 goto out;
553 if (x->km.state == XFRM_STATE_EXPIRED)
554 goto expired;
555 if (x->lft.hard_add_expires_seconds) {
556 long tmo = x->lft.hard_add_expires_seconds +
557 x->curlft.add_time - now;
e3c0d047
FD		 558 if (tmo <= 0) {
559 if (x->xflags & XFRM_SOFT_EXPIRE) {
560 /* enter hard expire without soft expire first?!
561 * setting a new date could trigger this.
1365e547 562 * workaround: fix x->curflt.add_time by below:
e3c0d047
FD		 563 */
564 x->curlft.add_time = now - x->saved_tmo - 1;
565 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
566 } else
567 goto expired;
568 }
1da177e4
LT		 569 if (tmo < next)
570 next = tmo;
571 }
572 if (x->lft.hard_use_expires_seconds) {
573 long tmo = x->lft.hard_use_expires_seconds +
574 (x->curlft.use_time ? : now) - now;
575 if (tmo <= 0)
576 goto expired;
577 if (tmo < next)
578 next = tmo;
579 }
580 if (x->km.dying)
581 goto resched;
582 if (x->lft.soft_add_expires_seconds) {
583 long tmo = x->lft.soft_add_expires_seconds +
584 x->curlft.add_time - now;
e3c0d047 585 if (tmo <= 0) {
1da177e4 586 warn = 1;
e3c0d047
FD		 587 x->xflags &= ~XFRM_SOFT_EXPIRE;
588 } else if (tmo < next) {
1da177e4 589 next = tmo;
e3c0d047
FD		 590 x->xflags |= XFRM_SOFT_EXPIRE;
591 x->saved_tmo = tmo;
592 }
1da177e4
LT		 593 }
594 if (x->lft.soft_use_expires_seconds) {
595 long tmo = x->lft.soft_use_expires_seconds +
596 (x->curlft.use_time ? : now) - now;
597 if (tmo <= 0)
598 warn = 1;
599 else if (tmo < next)
600 next = tmo;
601 }
602
4666faab 603 x->km.dying = warn;
1da177e4 604 if (warn)
53bc6b4d 605 km_state_expired(x, 0, 0);
1da177e4 606resched:
386c5680 607 if (next != TIME64_MAX) {
671422b2
TG		 608 hrtimer_forward_now(&x->mtimer, ktime_set(next, 0));
609 ret = HRTIMER_RESTART;
9e0d57fd 610 }
a47f0ce0 611
1da177e4
LT		 612 goto out;
613
614expired:
5b8ef341 615 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
1da177e4 616 x->km.state = XFRM_STATE_EXPIRED;
161a09e7
JL		 617
618 err = __xfrm_state_delete(x);
0806ae4c 619 if (!err)
53bc6b4d 620 km_state_expired(x, 1, 0);
1da177e4 621
2e71029e 622 xfrm_audit_state_delete(x, err ? 0 : 1, true);
161a09e7 623
1da177e4
LT		 624out:
625 spin_unlock(&x->lock);
671422b2 626 return ret;
1da177e4
LT		 627}
628
e99e88a9 629static void xfrm_replay_timer_handler(struct timer_list *t);
0ac84752 630
673c09be 631struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 632{
633 struct xfrm_state *x;
634
a4c278d1 635 x = kmem_cache_zalloc(xfrm_state_cache, GFP_ATOMIC);
1da177e4
LT		 636
637 if (x) {
673c09be 638 write_pnet(&x->xs_net, net);
88755e9c 639 refcount_set(&x->refcnt, 1);
1da177e4 640 atomic_set(&x->tunnel_users, 0);
12a169e7 641 INIT_LIST_HEAD(&x->km.all);
8f126e37
DM		 642 INIT_HLIST_NODE(&x->bydst);
643 INIT_HLIST_NODE(&x->bysrc);
644 INIT_HLIST_NODE(&x->byspi);
fe9f1d87 645 INIT_HLIST_NODE(&x->byseq);
671422b2
TG		 646 hrtimer_init(&x->mtimer, CLOCK_BOOTTIME, HRTIMER_MODE_ABS_SOFT);
647 x->mtimer.function = xfrm_timer_handler;
e99e88a9 648 timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
386c5680 649 x->curlft.add_time = ktime_get_real_seconds();
1da177e4
LT		 650 x->lft.soft_byte_limit = XFRM_INF;
651 x->lft.soft_packet_limit = XFRM_INF;
652 x->lft.hard_byte_limit = XFRM_INF;
653 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 654 x->replay_maxage = 0;
655 x->replay_maxdiff = 0;
1da177e4
LT		 656 spin_lock_init(&x->lock);
657 }
658 return x;
659}
660EXPORT_SYMBOL(xfrm_state_alloc);
661
f75a2804 662void __xfrm_state_destroy(struct xfrm_state *x, bool sync)
1da177e4 663{
547b792c 664 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4 665
f75a2804
CW		 666 if (sync) {
667 synchronize_rcu();
668 ___xfrm_state_destroy(x);
669 } else {
670 spin_lock_bh(&xfrm_state_gc_lock);
671 hlist_add_head(&x->gclist, &xfrm_state_gc_list);
672 spin_unlock_bh(&xfrm_state_gc_lock);
673 schedule_work(&xfrm_state_gc_work);
674 }
1da177e4
LT		 675}
676EXPORT_SYMBOL(__xfrm_state_destroy);
677
53bc6b4d 678int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 679{
98806f75 680 struct net *net = xs_net(x);
26b15dad
JHS		 681 int err = -ESRCH;
682
1da177e4
LT		 683 if (x->km.state != XFRM_STATE_DEAD) {
684 x->km.state = XFRM_STATE_DEAD;
283bc9f3 685 spin_lock(&net->xfrm.xfrm_state_lock);
12a169e7 686 list_del(&x->km.all);
ae3fb6d3
FW		 687 hlist_del_rcu(&x->bydst);
688 hlist_del_rcu(&x->bysrc);
fe9f1d87
SD		 689 if (x->km.seq)
690 hlist_del_rcu(&x->byseq);
a47f0ce0 691 if (x->id.spi)
ae3fb6d3 692 hlist_del_rcu(&x->byspi);
98806f75 693 net->xfrm.state_num--;
283bc9f3 694 spin_unlock(&net->xfrm.xfrm_state_lock);
1da177e4 695
e27cca96
SD		 696 if (x->encap_sk)
697 sock_put(rcu_dereference_raw(x->encap_sk));
698
d77e38e6
SK		 699 xfrm_dev_state_delete(x);
700
1da177e4
LT		 701 /* All xfrm_state objects are created by xfrm_state_alloc.
702 * The xfrm_state_alloc call gives a reference, and that
703 * is what we are dropping here.
704 */
5dba4797 705 xfrm_state_put(x);
26b15dad 706 err = 0;
1da177e4 707 }
26b15dad
JHS		 708
709 return err;
1da177e4 710}
53bc6b4d 711EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 712
26b15dad 713int xfrm_state_delete(struct xfrm_state *x)
1da177e4 714{
26b15dad
JHS		 715 int err;
716
1da177e4 717 spin_lock_bh(&x->lock);
26b15dad 718 err = __xfrm_state_delete(x);
1da177e4 719 spin_unlock_bh(&x->lock);
26b15dad
JHS		 720
721 return err;
1da177e4
LT		 722}
723EXPORT_SYMBOL(xfrm_state_delete);
724
4aa2e62c
JL		 725#ifdef CONFIG_SECURITY_NETWORK_XFRM
726static inline int
2e71029e 727xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
1da177e4 728{
4aa2e62c
JL		 729 int i, err = 0;
730
0e602451 731 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 732 struct xfrm_state *x;
733
b67bfe0d 734 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 735 if (xfrm_id_proto_match(x->id.proto, proto) &&
736 (err = security_xfrm_state_delete(x)) != 0) {
2e71029e 737 xfrm_audit_state_delete(x, 0, task_valid);
4aa2e62c
JL		 738 return err;
739 }
740 }
741 }
742
743 return err;
744}
d77e38e6
SK		 745
746static inline int
747xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
748{
749 int i, err = 0;
750
751 for (i = 0; i <= net->xfrm.state_hmask; i++) {
752 struct xfrm_state *x;
753 struct xfrm_state_offload *xso;
754
755 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
756 xso = &x->xso;
757
758 if (xso->dev == dev &&
759 (err = security_xfrm_state_delete(x)) != 0) {
760 xfrm_audit_state_delete(x, 0, task_valid);
761 return err;
762 }
763 }
764 }
765
766 return err;
767}
4aa2e62c
JL		 768#else
769static inline int
2e71029e 770xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
4aa2e62c
JL		 771{
772 return 0;
773}
d77e38e6
SK		 774
775static inline int
776xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
777{
778 return 0;
779}
4aa2e62c
JL		 780#endif
781
f75a2804 782int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync)
4aa2e62c 783{
9e64cc95 784 int i, err = 0, cnt = 0;
1da177e4 785
283bc9f3 786 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2e71029e 787 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
4aa2e62c
JL		 788 if (err)
789 goto out;
790
9e64cc95 791 err = -ESRCH;
0e602451 792 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37 793 struct xfrm_state *x;
1da177e4 794restart:
b67bfe0d 795 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1da177e4 796 if (!xfrm_state_kern(x) &&
5794708f 797 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4 798 xfrm_state_hold(x);
283bc9f3 799 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 800
161a09e7 801 err = xfrm_state_delete(x);
ab5f5e8b 802 xfrm_audit_state_delete(x, err ? 0 : 1,
2e71029e 803 task_valid);
f75a2804
CW		 804 if (sync)
805 xfrm_state_put_sync(x);
806 else
807 xfrm_state_put(x);
9e64cc95
JHS		 808 if (!err)
809 cnt++;
1da177e4 810
283bc9f3 811 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 812 goto restart;
813 }
814 }
815 }
dd269db8
AS		 816out:
817 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
e4db5b61 818 if (cnt)
9e64cc95 819 err = 0;
e4db5b61 820
4aa2e62c 821 return err;
1da177e4
LT		 822}
823EXPORT_SYMBOL(xfrm_state_flush);
824
d77e38e6
SK		 825int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
826{
827 int i, err = 0, cnt = 0;
828
829 spin_lock_bh(&net->xfrm.xfrm_state_lock);
830 err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
831 if (err)
832 goto out;
833
834 err = -ESRCH;
835 for (i = 0; i <= net->xfrm.state_hmask; i++) {
836 struct xfrm_state *x;
837 struct xfrm_state_offload *xso;
838restart:
839 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
840 xso = &x->xso;
841
842 if (!xfrm_state_kern(x) && xso->dev == dev) {
843 xfrm_state_hold(x);
844 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
845
846 err = xfrm_state_delete(x);
847 xfrm_audit_state_delete(x, err ? 0 : 1,
848 task_valid);
849 xfrm_state_put(x);
850 if (!err)
851 cnt++;
852
853 spin_lock_bh(&net->xfrm.xfrm_state_lock);
854 goto restart;
855 }
856 }
857 }
858 if (cnt)
859 err = 0;
860
861out:
862 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
863 return err;
864}
865EXPORT_SYMBOL(xfrm_dev_state_flush);
866
e071041b 867void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b 868{
283bc9f3 869 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e071041b 870 si->sadcnt = net->xfrm.state_num;
ca92e173 871 si->sadhcnt = net->xfrm.state_hmask + 1;
28d8909b 872 si->sadhmcnt = xfrm_state_hashmax;
283bc9f3 873 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
28d8909b
JHS		 874}
875EXPORT_SYMBOL(xfrm_sad_getinfo);
876
bac95935
FW		 877static void
878__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
879{
880 const struct flowi4 *fl4 = &fl->u.ip4;
881
882 sel->daddr.a4 = fl4->daddr;
883 sel->saddr.a4 = fl4->saddr;
884 sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
885 sel->dport_mask = htons(0xffff);
886 sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
887 sel->sport_mask = htons(0xffff);
888 sel->family = AF_INET;
889 sel->prefixlen_d = 32;
890 sel->prefixlen_s = 32;
891 sel->proto = fl4->flowi4_proto;
892 sel->ifindex = fl4->flowi4_oif;
893}
894
895static void
896__xfrm6_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
897{
898 const struct flowi6 *fl6 = &fl->u.ip6;
899
900 /* Initialize temporary selector matching only to current session. */
901 *(struct in6_addr *)&sel->daddr = fl6->daddr;
902 *(struct in6_addr *)&sel->saddr = fl6->saddr;
903 sel->dport = xfrm_flowi_dport(fl, &fl6->uli);
904 sel->dport_mask = htons(0xffff);
905 sel->sport = xfrm_flowi_sport(fl, &fl6->uli);
906 sel->sport_mask = htons(0xffff);
907 sel->family = AF_INET6;
908 sel->prefixlen_d = 128;
909 sel->prefixlen_s = 128;
910 sel->proto = fl6->flowi6_proto;
911 sel->ifindex = fl6->flowi6_oif;
912}
913
711059b9 914static void
1a898592 915xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
04686013 916 const struct xfrm_tmpl *tmpl,
33765d06 917 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
8444cf71 918 unsigned short family)
1da177e4 919{
bac95935
FW		 920 switch (family) {
921 case AF_INET:
922 __xfrm4_init_tempsel(&x->sel, fl);
923 break;
924 case AF_INET6:
925 __xfrm6_init_tempsel(&x->sel, fl);
926 break;
927 }
928
5c1b9ab3 929 x->id = tmpl->id;
bac95935 930
5c1b9ab3
FW		 931 switch (tmpl->encap_family) {
932 case AF_INET:
933 if (x->id.daddr.a4 == 0)
934 x->id.daddr.a4 = daddr->a4;
935 x->props.saddr = tmpl->saddr;
936 if (x->props.saddr.a4 == 0)
937 x->props.saddr.a4 = saddr->a4;
938 break;
939 case AF_INET6:
940 if (ipv6_addr_any((struct in6_addr *)&x->id.daddr))
941 memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
942 memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
943 if (ipv6_addr_any((struct in6_addr *)&x->props.saddr))
944 memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
945 break;
946 }
3819a35f 947
5c1b9ab3
FW		 948 x->props.mode = tmpl->mode;
949 x->props.reqid = tmpl->reqid;
950 x->props.family = tmpl->encap_family;
1da177e4
LT		 951}
952
9aa60088
DM		 953static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
954 const xfrm_address_t *daddr,
955 __be32 spi, u8 proto,
956 unsigned short family)
edcd5821 957{
221df1ed 958 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
edcd5821
DM		 959 struct xfrm_state *x;
960
ae3fb6d3 961 hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) {
edcd5821
DM		 962 if (x->props.family != family ||
963 x->id.spi != spi ||
1802571b 964 x->id.proto != proto ||
70e94e66 965 !xfrm_addr_equal(&x->id.daddr, daddr, family))
edcd5821
DM		 966 continue;
967
3d6acfa7
JHS		 968 if ((mark & x->mark.m) != x->mark.v)
969 continue;
02efdff7
FW		 970 if (!xfrm_state_hold_rcu(x))
971 continue;
edcd5821
DM		 972 return x;
973 }
974
975 return NULL;
976}
977
9aa60088
DM		 978static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
979 const xfrm_address_t *daddr,
980 const xfrm_address_t *saddr,
981 u8 proto, unsigned short family)
edcd5821 982{
221df1ed 983 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
edcd5821
DM		 984 struct xfrm_state *x;
985
ae3fb6d3 986 hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) {
edcd5821 987 if (x->props.family != family ||
1802571b 988 x->id.proto != proto ||
70e94e66
YH		 989 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
990 !xfrm_addr_equal(&x->props.saddr, saddr, family))
edcd5821
DM		 991 continue;
992
3d6acfa7
JHS		 993 if ((mark & x->mark.m) != x->mark.v)
994 continue;
02efdff7
FW		 995 if (!xfrm_state_hold_rcu(x))
996 continue;
edcd5821
DM		 997 return x;
998 }
999
1000 return NULL;
1001}
1002
1003static inline struct xfrm_state *
1004__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
1005{
221df1ed 1006 struct net *net = xs_net(x);
bd55775c 1007 u32 mark = x->mark.v & x->mark.m;
221df1ed 1008
edcd5821 1009 if (use_spi)
bd55775c
JHS		 1010 return __xfrm_state_lookup(net, mark, &x->id.daddr,
1011 x->id.spi, x->id.proto, family);
edcd5821 1012 else
bd55775c
JHS		 1013 return __xfrm_state_lookup_byaddr(net, mark,
1014 &x->id.daddr,
edcd5821
DM		 1015 &x->props.saddr,
1016 x->id.proto, family);
1017}
1018
98806f75 1019static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 1020{
1021 if (have_hash_collision &&
98806f75
AD		 1022 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
1023 net->xfrm.state_num > net->xfrm.state_hmask)
1024 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 1025}
1026
08ec9af1 1027static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
4a08ab0f 1028 const struct flowi *fl, unsigned short family,
08ec9af1
DM		 1029 struct xfrm_state **best, int *acq_in_progress,
1030 int *error)
1031{
1032 /* Resolution logic:
1033 * 1. There is a valid state with matching selector. Done.
1034 * 2. Valid state with inappropriate selector. Skip.
1035 *
1036 * Entering area of "sysdeps".
1037 *
1038 * 3. If state is not valid, selector is temporary, it selects
1039 * only session which triggered previous resolution. Key
1040 * manager will do something to install a state with proper
1041 * selector.
1042 */
1043 if (x->km.state == XFRM_STATE_VALID) {
1044 if ((x->sel.family &&
e94ee171
HX		 1045 (x->sel.family != family ||
1046 !xfrm_selector_match(&x->sel, fl, family))) ||
3df98d79
PM		 1047 !security_xfrm_state_pol_flow_match(x, pol,
1048 &fl->u.__fl_common))
08ec9af1
DM		 1049 return;
1050
1051 if (!*best ||
1052 (*best)->km.dying > x->km.dying ||
1053 ((*best)->km.dying == x->km.dying &&
1054 (*best)->curlft.add_time < x->curlft.add_time))
1055 *best = x;
1056 } else if (x->km.state == XFRM_STATE_ACQ) {
1057 *acq_in_progress = 1;
1058 } else if (x->km.state == XFRM_STATE_ERROR ||
1059 x->km.state == XFRM_STATE_EXPIRED) {
e94ee171
HX		 1060 if ((!x->sel.family ||
1061 (x->sel.family == family &&
1062 xfrm_selector_match(&x->sel, fl, family))) &&
3df98d79
PM		 1063 security_xfrm_state_pol_flow_match(x, pol,
1064 &fl->u.__fl_common))
08ec9af1
DM		 1065 *error = -ESRCH;
1066 }
1067}
1068
1da177e4 1069struct xfrm_state *
33765d06 1070xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
b520e9f6 1071 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1da177e4 1072 struct xfrm_policy *pol, int *err,
bc56b334 1073 unsigned short family, u32 if_id)
1da177e4 1074{
08ec9af1 1075 static xfrm_address_t saddr_wildcard = { };
5447c5e4 1076 struct net *net = xp_net(pol);
6a783c90 1077 unsigned int h, h_wildcard;
37b08e34 1078 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 1079 int acquire_in_progress = 0;
1080 int error = 0;
1081 struct xfrm_state *best = NULL;
bd55775c 1082 u32 mark = pol->mark.v & pol->mark.m;
8444cf71 1083 unsigned short encap_family = tmpl->encap_family;
b65e3d7b 1084 unsigned int sequence;
0f24558e 1085 struct km_event c;
a716c119 1086
37b08e34
DM		 1087 to_put = NULL;
1088
e88add19 1089 sequence = read_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
b65e3d7b 1090
d737a580 1091 rcu_read_lock();
8444cf71 1092 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
ae3fb6d3 1093 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
8444cf71 1094 if (x->props.family == encap_family &&
1da177e4 1095 x->props.reqid == tmpl->reqid &&
3d6acfa7 1096 (mark & x->mark.m) == x->mark.v &&
7e652640 1097 x->if_id == if_id &&
fbd9a5b4 1098 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 1099 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1da177e4
LT		 1100 tmpl->mode == x->props.mode &&
1101 tmpl->id.proto == x->id.proto &&
08ec9af1 1102 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
e94ee171 1103 xfrm_state_look_at(pol, x, fl, family,
08ec9af1
DM		 1104 &best, &acquire_in_progress, &error);
1105 }
6f115638 1106 if (best || acquire_in_progress)
08ec9af1
DM		 1107 goto found;
1108
8444cf71 1109 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
ae3fb6d3 1110 hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) {
8444cf71 1111 if (x->props.family == encap_family &&
08ec9af1 1112 x->props.reqid == tmpl->reqid &&
3d6acfa7 1113 (mark & x->mark.m) == x->mark.v &&
7e652640 1114 x->if_id == if_id &&
08ec9af1 1115 !(x->props.flags & XFRM_STATE_WILDRECV) &&
f59bbdfa 1116 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
08ec9af1
DM		 1117 tmpl->mode == x->props.mode &&
1118 tmpl->id.proto == x->id.proto &&
1119 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
e94ee171 1120 xfrm_state_look_at(pol, x, fl, family,
08ec9af1 1121 &best, &acquire_in_progress, &error);
1da177e4
LT		 1122 }
1123
08ec9af1 1124found:
1da177e4
LT		 1125 x = best;
1126 if (!x && !error && !acquire_in_progress) {
5c5d281a 1127 if (tmpl->id.spi &&
bd55775c 1128 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
8444cf71 1129 tmpl->id.proto, encap_family)) != NULL) {
37b08e34 1130 to_put = x0;
1da177e4
LT		 1131 error = -EEXIST;
1132 goto out;
1133 }
0f24558e
HG		 1134
1135 c.net = net;
1136 /* If the KMs have no listeners (yet...), avoid allocating an SA
1137 * for each and every packet - garbage collection might not
1138 * handle the flood.
1139 */
1140 if (!km_is_alive(&c)) {
1141 error = -ESRCH;
1142 goto out;
1143 }
1144
5447c5e4 1145 x = xfrm_state_alloc(net);
1da177e4
LT		 1146 if (x == NULL) {
1147 error = -ENOMEM;
1148 goto out;
1149 }
8444cf71 1150 /* Initialize temporary state matching only
1da177e4 1151 * to current session. */
8444cf71 1152 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
bd55775c 1153 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
7e652640 1154 x->if_id = if_id;
1da177e4 1155
1d28f42c 1156 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
e0d1caa7
VY		 1157 if (error) {
1158 x->km.state = XFRM_STATE_DEAD;
37b08e34 1159 to_put = x;
e0d1caa7
VY		 1160 x = NULL;
1161 goto out;
1162 }
1163
1da177e4 1164 if (km_query(x, tmpl, pol) == 0) {
d737a580 1165 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1166 x->km.state = XFRM_STATE_ACQ;
5447c5e4 1167 list_add(&x->km.all, &net->xfrm.state_all);
ae3fb6d3 1168 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
8444cf71 1169 h = xfrm_src_hash(net, daddr, saddr, encap_family);
ae3fb6d3 1170 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1da177e4 1171 if (x->id.spi) {
8444cf71 1172 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
ae3fb6d3 1173 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
1da177e4 1174 }
fe9f1d87
SD		 1175 if (x->km.seq) {
1176 h = xfrm_seq_hash(net, x->km.seq);
1177 hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h);
1178 }
b27aeadb 1179 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
671422b2
TG		 1180 hrtimer_start(&x->mtimer,
1181 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1182 HRTIMER_MODE_REL_SOFT);
5447c5e4
AD		 1183 net->xfrm.state_num++;
1184 xfrm_hash_grow_check(net, x->bydst.next != NULL);
d737a580 1185 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1186 } else {
1187 x->km.state = XFRM_STATE_DEAD;
37b08e34 1188 to_put = x;
1da177e4
LT		 1189 x = NULL;
1190 error = -ESRCH;
1191 }
1192 }
1193out:
02efdff7
FW		 1194 if (x) {
1195 if (!xfrm_state_hold_rcu(x)) {
1196 *err = -EAGAIN;
1197 x = NULL;
1198 }
1199 } else {
1da177e4 1200 *err = acquire_in_progress ? -EAGAIN : error;
02efdff7 1201 }
d737a580 1202 rcu_read_unlock();
37b08e34
DM		 1203 if (to_put)
1204 xfrm_state_put(to_put);
b65e3d7b 1205
e88add19 1206 if (read_seqcount_retry(&net->xfrm.xfrm_state_hash_generation, sequence)) {
b65e3d7b
FW		 1207 *err = -EAGAIN;
1208 if (x) {
1209 xfrm_state_put(x);
1210 x = NULL;
1211 }
1212 }
1213
1da177e4
LT		 1214 return x;
1215}
1216
628529b6 1217struct xfrm_state *
7e652640 1218xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
5447c5e4 1219 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 1220 unsigned short family, u8 mode, u8 proto, u32 reqid)
1221{
4bda4f25 1222 unsigned int h;
628529b6 1223 struct xfrm_state *rx = NULL, *x = NULL;
628529b6 1224
4ae770bf 1225 spin_lock_bh(&net->xfrm.xfrm_state_lock);
5447c5e4 1226 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
b67bfe0d 1227 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 1228 if (x->props.family == family &&
1229 x->props.reqid == reqid &&
3d6acfa7 1230 (mark & x->mark.m) == x->mark.v &&
7e652640 1231 x->if_id == if_id &&
628529b6
JHS		 1232 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1233 xfrm_state_addr_check(x, daddr, saddr, family) &&
1234 mode == x->props.mode &&
1235 proto == x->id.proto &&
1236 x->km.state == XFRM_STATE_VALID) {
1237 rx = x;
1238 break;
1239 }
1240 }
1241
1242 if (rx)
1243 xfrm_state_hold(rx);
4ae770bf 1244 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
628529b6
JHS		 1245
1246
1247 return rx;
1248}
1249EXPORT_SYMBOL(xfrm_stateonly_find);
1250
c454997e
FD		 1251struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1252 unsigned short family)
1253{
1254 struct xfrm_state *x;
1255 struct xfrm_state_walk *w;
1256
1257 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1258 list_for_each_entry(w, &net->xfrm.state_all, all) {
1259 x = container_of(w, struct xfrm_state, km);
1260 if (x->props.family != family ||
1261 x->id.spi != spi)
1262 continue;
1263
c454997e 1264 xfrm_state_hold(x);
bdddbf69 1265 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
c454997e
FD		 1266 return x;
1267 }
1268 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1269 return NULL;
1270}
1271EXPORT_SYMBOL(xfrm_state_lookup_byspi);
1272
1da177e4
LT		 1273static void __xfrm_state_insert(struct xfrm_state *x)
1274{
98806f75 1275 struct net *net = xs_net(x);
a624c108 1276 unsigned int h;
1da177e4 1277
98806f75 1278 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 1279
98806f75 1280 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 1281 x->props.reqid, x->props.family);
ae3fb6d3 1282 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
1da177e4 1283
98806f75 1284 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
ae3fb6d3 1285 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
1da177e4 1286
7b4dc360 1287 if (x->id.spi) {
98806f75 1288 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 1289 x->props.family);
1290
ae3fb6d3 1291 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
6c44e6b7
MN		 1292 }
1293
fe9f1d87
SD		 1294 if (x->km.seq) {
1295 h = xfrm_seq_hash(net, x->km.seq);
1296
1297 hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h);
1298 }
1299
671422b2 1300 hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL_SOFT);
a47f0ce0
DM		 1301 if (x->replay_maxage)
1302 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 1303
98806f75 1304 net->xfrm.state_num++;
f034b5d4 1305
98806f75 1306 xfrm_hash_grow_check(net, x->bydst.next != NULL);
1da177e4
LT		 1307}
1308
283bc9f3 1309/* net->xfrm.xfrm_state_lock is held */
c7f5ea3a
DM		 1310static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
1311{
98806f75 1312 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 1313 unsigned short family = xnew->props.family;
1314 u32 reqid = xnew->props.reqid;
1315 struct xfrm_state *x;
c7f5ea3a 1316 unsigned int h;
3d6acfa7 1317 u32 mark = xnew->mark.v & xnew->mark.m;
7e652640 1318 u32 if_id = xnew->if_id;
c7f5ea3a 1319
98806f75 1320 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
b67bfe0d 1321 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 1322 if (x->props.family == family &&
1323 x->props.reqid == reqid &&
7e652640 1324 x->if_id == if_id &&
3d6acfa7 1325 (mark & x->mark.m) == x->mark.v &&
70e94e66
YH		 1326 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
1327 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 1328 x->genid++;
c7f5ea3a
DM		 1329 }
1330}
1331
1da177e4
LT		 1332void xfrm_state_insert(struct xfrm_state *x)
1333{
283bc9f3
FD		 1334 struct net *net = xs_net(x);
1335
1336 spin_lock_bh(&net->xfrm.xfrm_state_lock);
c7f5ea3a 1337 __xfrm_state_bump_genids(x);
1da177e4 1338 __xfrm_state_insert(x);
283bc9f3 1339 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1340}
1341EXPORT_SYMBOL(xfrm_state_insert);
1342
283bc9f3 1343/* net->xfrm.xfrm_state_lock is held */
e473fcb4
MK		 1344static struct xfrm_state *__find_acq_core(struct net *net,
1345 const struct xfrm_mark *m,
a70486f0 1346 unsigned short family, u8 mode,
7e652640 1347 u32 reqid, u32 if_id, u8 proto,
a70486f0 1348 const xfrm_address_t *daddr,
e473fcb4
MK		 1349 const xfrm_address_t *saddr,
1350 int create)
2770834c 1351{
5447c5e4 1352 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
2770834c 1353 struct xfrm_state *x;
3d6acfa7 1354 u32 mark = m->v & m->m;
2770834c 1355
b67bfe0d 1356 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 1357 if (x->props.reqid != reqid ||
1358 x->props.mode != mode ||
1359 x->props.family != family ||
1360 x->km.state != XFRM_STATE_ACQ ||
75e252d9 1361 x->id.spi != 0 ||
1802571b 1362 x->id.proto != proto ||
3d6acfa7 1363 (mark & x->mark.m) != x->mark.v ||
70e94e66
YH		 1364 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1365 !xfrm_addr_equal(&x->props.saddr, saddr, family))
2770834c
DM		 1366 continue;
1367
2770834c
DM		 1368 xfrm_state_hold(x);
1369 return x;
1370 }
1371
1372 if (!create)
1373 return NULL;
1374
5447c5e4 1375 x = xfrm_state_alloc(net);
2770834c
DM		 1376 if (likely(x)) {
1377 switch (family) {
1378 case AF_INET:
1379 x->sel.daddr.a4 = daddr->a4;
1380 x->sel.saddr.a4 = saddr->a4;
1381 x->sel.prefixlen_d = 32;
1382 x->sel.prefixlen_s = 32;
1383 x->props.saddr.a4 = saddr->a4;
1384 x->id.daddr.a4 = daddr->a4;
1385 break;
1386
1387 case AF_INET6:
15e318bd
JB		 1388 x->sel.daddr.in6 = daddr->in6;
1389 x->sel.saddr.in6 = saddr->in6;
2770834c
DM		 1390 x->sel.prefixlen_d = 128;
1391 x->sel.prefixlen_s = 128;
15e318bd
JB		 1392 x->props.saddr.in6 = saddr->in6;
1393 x->id.daddr.in6 = daddr->in6;
2770834c 1394 break;
3ff50b79 1395 }
2770834c
DM		 1396
1397 x->km.state = XFRM_STATE_ACQ;
1398 x->id.proto = proto;
1399 x->props.family = family;
1400 x->props.mode = mode;
1401 x->props.reqid = reqid;
7e652640 1402 x->if_id = if_id;
bd55775c
JHS		 1403 x->mark.v = m->v;
1404 x->mark.m = m->m;
b27aeadb 1405 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1406 xfrm_state_hold(x);
671422b2
TG		 1407 hrtimer_start(&x->mtimer,
1408 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1409 HRTIMER_MODE_REL_SOFT);
5447c5e4 1410 list_add(&x->km.all, &net->xfrm.state_all);
ae3fb6d3 1411 hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
5447c5e4 1412 h = xfrm_src_hash(net, daddr, saddr, family);
ae3fb6d3 1413 hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
918049f0 1414
5447c5e4 1415 net->xfrm.state_num++;
918049f0 1416
5447c5e4 1417 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1418 }
1419
1420 return x;
1421}
1422
bd55775c 1423static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1da177e4
LT		 1424
1425int xfrm_state_add(struct xfrm_state *x)
1426{
5447c5e4 1427 struct net *net = xs_net(x);
37b08e34 1428 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1429 int family;
1430 int err;
bd55775c 1431 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1432 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1433
1434 family = x->props.family;
1da177e4 1435
37b08e34
DM		 1436 to_put = NULL;
1437
283bc9f3 1438 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1439
edcd5821 1440 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1441 if (x1) {
37b08e34 1442 to_put = x1;
1da177e4
LT		 1443 x1 = NULL;
1444 err = -EEXIST;
1445 goto out;
1446 }
1447
eb2971b6 1448 if (use_spi && x->km.seq) {
bd55775c 1449 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
75e252d9 1450 if (x1 && ((x1->id.proto != x->id.proto) ||
70e94e66 1451 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1452 to_put = x1;
1da177e4
LT		 1453 x1 = NULL;
1454 }
1455 }
1456
eb2971b6 1457 if (use_spi && !x1)
bd55775c 1458 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
7e652640 1459 x->props.reqid, x->if_id, x->id.proto,
2770834c 1460 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1461
c7f5ea3a 1462 __xfrm_state_bump_genids(x);
1da177e4
LT		 1463 __xfrm_state_insert(x);
1464 err = 0;
1465
1466out:
283bc9f3 1467 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1468
1469 if (x1) {
1470 xfrm_state_delete(x1);
1471 xfrm_state_put(x1);
1472 }
1473
37b08e34
DM		 1474 if (to_put)
1475 xfrm_state_put(to_put);
1476
1da177e4
LT		 1477 return err;
1478}
1479EXPORT_SYMBOL(xfrm_state_add);
1480
80c9abaa 1481#ifdef CONFIG_XFRM_MIGRATE
7aa05d30
AA		 1482static inline int clone_security(struct xfrm_state *x, struct xfrm_sec_ctx *security)
1483{
1484 struct xfrm_user_sec_ctx *uctx;
1485 int size = sizeof(*uctx) + security->ctx_len;
1486 int err;
1487
1488 uctx = kmalloc(size, GFP_KERNEL);
1489 if (!uctx)
1490 return -ENOMEM;
1491
1492 uctx->exttype = XFRMA_SEC_CTX;
1493 uctx->len = size;
1494 uctx->ctx_doi = security->ctx_doi;
1495 uctx->ctx_alg = security->ctx_alg;
1496 uctx->ctx_len = security->ctx_len;
1497 memcpy(uctx + 1, security->ctx_str, security->ctx_len);
1498 err = security_xfrm_state_alloc(x, uctx);
1499 kfree(uctx);
1500 if (err)
1501 return err;
1502
1503 return 0;
1504}
1505
4ab47d47
AA		 1506static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
1507 struct xfrm_encap_tmpl *encap)
80c9abaa 1508{
98806f75 1509 struct net *net = xs_net(orig);
98806f75 1510 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1511 if (!x)
553f9118 1512 goto out;
80c9abaa
SS		 1513
1514 memcpy(&x->id, &orig->id, sizeof(x->id));
1515 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1516 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1517 x->props.mode = orig->props.mode;
1518 x->props.replay_window = orig->props.replay_window;
1519 x->props.reqid = orig->props.reqid;
1520 x->props.family = orig->props.family;
1521 x->props.saddr = orig->props.saddr;
1522
1523 if (orig->aalg) {
4447bb33 1524 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1525 if (!x->aalg)
1526 goto error;
1527 }
1528 x->props.aalgo = orig->props.aalgo;
1529
ee5c2317
SK		 1530 if (orig->aead) {
1531 x->aead = xfrm_algo_aead_clone(orig->aead);
75bf50f4 1532 x->geniv = orig->geniv;
ee5c2317
SK		 1533 if (!x->aead)
1534 goto error;
1535 }
80c9abaa
SS		 1536 if (orig->ealg) {
1537 x->ealg = xfrm_algo_clone(orig->ealg);
1538 if (!x->ealg)
1539 goto error;
1540 }
1541 x->props.ealgo = orig->props.ealgo;
1542
1543 if (orig->calg) {
1544 x->calg = xfrm_algo_clone(orig->calg);
1545 if (!x->calg)
1546 goto error;
1547 }
1548 x->props.calgo = orig->props.calgo;
1549
4ab47d47
AA		 1550 if (encap || orig->encap) {
1551 if (encap)
1552 x->encap = kmemdup(encap, sizeof(*x->encap),
1553 GFP_KERNEL);
1554 else
1555 x->encap = kmemdup(orig->encap, sizeof(*x->encap),
1556 GFP_KERNEL);
1557
80c9abaa
SS		 1558 if (!x->encap)
1559 goto error;
1560 }
1561
7aa05d30
AA		 1562 if (orig->security)
1563 if (clone_security(x, orig->security))
1564 goto error;
1565
80c9abaa
SS		 1566 if (orig->coaddr) {
1567 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1568 GFP_KERNEL);
1569 if (!x->coaddr)
1570 goto error;
1571 }
1572
af2f464e 1573 if (orig->replay_esn) {
cc9ab60e 1574 if (xfrm_replay_clone(x, orig))
af2f464e
SK		 1575 goto error;
1576 }
1577
bd55775c 1578 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
545e5c57 1579 memcpy(&x->props.smark, &orig->props.smark, sizeof(x->props.smark));
bd55775c 1580
cc9ab60e 1581 if (xfrm_init_state(x) < 0)
80c9abaa
SS		 1582 goto error;
1583
1584 x->props.flags = orig->props.flags;
a947b0a9 1585 x->props.extra_flags = orig->props.extra_flags;
80c9abaa 1586
7e652640 1587 x->if_id = orig->if_id;
ee5c2317
SK		 1588 x->tfcpad = orig->tfcpad;
1589 x->replay_maxdiff = orig->replay_maxdiff;
1590 x->replay_maxage = orig->replay_maxage;
8366685b 1591 memcpy(&x->curlft, &orig->curlft, sizeof(x->curlft));
80c9abaa
SS		 1592 x->km.state = orig->km.state;
1593 x->km.seq = orig->km.seq;
a486cd23
AA		 1594 x->replay = orig->replay;
1595 x->preplay = orig->preplay;
80c9abaa
SS		 1596
1597 return x;
1598
1599 error:
553f9118
HX		 1600 xfrm_state_put(x);
1601out:
80c9abaa
SS		 1602 return NULL;
1603}
80c9abaa 1604
283bc9f3 1605struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
80c9abaa
SS		 1606{
1607 unsigned int h;
8c0cba22
SK		 1608 struct xfrm_state *x = NULL;
1609
1610 spin_lock_bh(&net->xfrm.xfrm_state_lock);
80c9abaa
SS		 1611
1612 if (m->reqid) {
283bc9f3 1613 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1614 m->reqid, m->old_family);
283bc9f3 1615 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 1616 if (x->props.mode != m->mode ||
1617 x->id.proto != m->proto)
1618 continue;
1619 if (m->reqid && x->props.reqid != m->reqid)
1620 continue;
70e94e66
YH		 1621 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1622 m->old_family) ||
1623 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1624 m->old_family))
80c9abaa
SS		 1625 continue;
1626 xfrm_state_hold(x);
8c0cba22 1627 break;
80c9abaa
SS		 1628 }
1629 } else {
283bc9f3 1630 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 1631 m->old_family);
283bc9f3 1632 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 1633 if (x->props.mode != m->mode ||
1634 x->id.proto != m->proto)
1635 continue;
70e94e66
YH		 1636 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
1637 m->old_family) ||
1638 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
1639 m->old_family))
80c9abaa
SS		 1640 continue;
1641 xfrm_state_hold(x);
8c0cba22 1642 break;
80c9abaa
SS		 1643 }
1644 }
1645
8c0cba22
SK		 1646 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1647
1648 return x;
80c9abaa
SS		 1649}
1650EXPORT_SYMBOL(xfrm_migrate_state_find);
1651
3e94c2dc 1652struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
4ab47d47
AA		 1653 struct xfrm_migrate *m,
1654 struct xfrm_encap_tmpl *encap)
80c9abaa
SS		 1655{
1656 struct xfrm_state *xc;
80c9abaa 1657
4ab47d47 1658 xc = xfrm_state_clone(x, encap);
80c9abaa
SS		 1659 if (!xc)
1660 return NULL;
1661
1662 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1663 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1664
1665 /* add state */
70e94e66 1666 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
80c9abaa
SS		 1667 /* a care is needed when the destination address of the
1668 state is to be updated as it is a part of triplet */
1669 xfrm_state_insert(xc);
1670 } else {
cc9ab60e 1671 if (xfrm_state_add(xc) < 0)
80c9abaa
SS		 1672 goto error;
1673 }
1674
1675 return xc;
1676error:
78347c8c 1677 xfrm_state_put(xc);
80c9abaa
SS		 1678 return NULL;
1679}
1680EXPORT_SYMBOL(xfrm_state_migrate);
1681#endif
1682
1da177e4
LT		 1683int xfrm_state_update(struct xfrm_state *x)
1684{
37b08e34 1685 struct xfrm_state *x1, *to_put;
1da177e4 1686 int err;
eb2971b6 1687 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
283bc9f3 1688 struct net *net = xs_net(x);
1da177e4 1689
37b08e34
DM		 1690 to_put = NULL;
1691
283bc9f3 1692 spin_lock_bh(&net->xfrm.xfrm_state_lock);
edcd5821 1693 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 1694
1695 err = -ESRCH;
1696 if (!x1)
1697 goto out;
1698
1699 if (xfrm_state_kern(x1)) {
37b08e34 1700 to_put = x1;
1da177e4
LT		 1701 err = -EEXIST;
1702 goto out;
1703 }
1704
1705 if (x1->km.state == XFRM_STATE_ACQ) {
1706 __xfrm_state_insert(x);
1707 x = NULL;
1708 }
1709 err = 0;
1710
1711out:
283bc9f3 1712 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1713
37b08e34
DM		 1714 if (to_put)
1715 xfrm_state_put(to_put);
1716
1da177e4
LT		 1717 if (err)
1718 return err;
1719
1720 if (!x) {
1721 xfrm_state_delete(x1);
1722 xfrm_state_put(x1);
1723 return 0;
1724 }
1725
1726 err = -EINVAL;
1727 spin_lock_bh(&x1->lock);
1728 if (likely(x1->km.state == XFRM_STATE_VALID)) {
257a4b01
HX		 1729 if (x->encap && x1->encap &&
1730 x->encap->encap_type == x1->encap->encap_type)
1da177e4 1731 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
257a4b01
HX		 1732 else if (x->encap || x1->encap)
1733 goto fail;
1734
060f02a3
NT		 1735 if (x->coaddr && x1->coaddr) {
1736 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1737 }
1738 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1739 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 1740 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1741 x1->km.dying = 0;
1742
671422b2
TG		 1743 hrtimer_start(&x1->mtimer, ktime_set(1, 0),
1744 HRTIMER_MODE_REL_SOFT);
1da177e4
LT		 1745 if (x1->curlft.use_time)
1746 xfrm_state_check_expire(x1);
1747
5baf4f9c 1748 if (x->props.smark.m || x->props.smark.v || x->if_id) {
6d8e85ff
NH		 1749 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1750
5baf4f9c
NH		 1751 if (x->props.smark.m || x->props.smark.v)
1752 x1->props.smark = x->props.smark;
1753
1754 if (x->if_id)
1755 x1->if_id = x->if_id;
6d8e85ff
NH		 1756
1757 __xfrm_state_bump_genids(x1);
1758 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1759 }
1760
1da177e4 1761 err = 0;
8fcbc637
TG		 1762 x->km.state = XFRM_STATE_DEAD;
1763 __xfrm_state_put(x);
1da177e4 1764 }
257a4b01
HX		 1765
1766fail:
1da177e4
LT		 1767 spin_unlock_bh(&x1->lock);
1768
1769 xfrm_state_put(x1);
1770
1771 return err;
1772}
1773EXPORT_SYMBOL(xfrm_state_update);
1774
1775int xfrm_state_check_expire(struct xfrm_state *x)
1776{
1777 if (!x->curlft.use_time)
386c5680 1778 x->curlft.use_time = ktime_get_real_seconds();
1da177e4 1779
1da177e4
LT		 1780 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1781 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 1782 x->km.state = XFRM_STATE_EXPIRED;
671422b2 1783 hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL_SOFT);
1da177e4
LT		 1784 return -EINVAL;
1785 }
1786
1787 if (!x->km.dying &&
1788 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 1789 x->curlft.packets >= x->lft.soft_packet_limit)) {
1790 x->km.dying = 1;
53bc6b4d 1791 km_state_expired(x, 0, 0);
4666faab 1792 }
1da177e4
LT		 1793 return 0;
1794}
1795EXPORT_SYMBOL(xfrm_state_check_expire);
1796
1da177e4 1797struct xfrm_state *
a70486f0 1798xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
bd55775c 1799 u8 proto, unsigned short family)
1da177e4
LT		 1800{
1801 struct xfrm_state *x;
1da177e4 1802
c2f672fc 1803 rcu_read_lock();
bd55775c 1804 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
c2f672fc 1805 rcu_read_unlock();
1da177e4
LT		 1806 return x;
1807}
1808EXPORT_SYMBOL(xfrm_state_lookup);
1809
1810struct xfrm_state *
bd55775c 1811xfrm_state_lookup_byaddr(struct net *net, u32 mark,
a70486f0 1812 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
eb2971b6
MN		 1813 u8 proto, unsigned short family)
1814{
1815 struct xfrm_state *x;
eb2971b6 1816
283bc9f3 1817 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1818 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
283bc9f3 1819 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
eb2971b6
MN		 1820 return x;
1821}
1822EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1823
1824struct xfrm_state *
e473fcb4 1825xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
7e652640 1826 u32 if_id, u8 proto, const xfrm_address_t *daddr,
e473fcb4 1827 const xfrm_address_t *saddr, int create, unsigned short family)
1da177e4
LT		 1828{
1829 struct xfrm_state *x;
1da177e4 1830
283bc9f3 1831 spin_lock_bh(&net->xfrm.xfrm_state_lock);
7e652640 1832 x = __find_acq_core(net, mark, family, mode, reqid, if_id, proto, daddr, saddr, create);
283bc9f3 1833 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2770834c 1834
1da177e4
LT		 1835 return x;
1836}
1837EXPORT_SYMBOL(xfrm_find_acq);
1838
41a49cc3 1839#ifdef CONFIG_XFRM_SUB_POLICY
3aaf3915
FW		 1840#if IS_ENABLED(CONFIG_IPV6)
1841/* distribution counting sort function for xfrm_state and xfrm_tmpl */
1842static void
1843__xfrm6_sort(void **dst, void **src, int n,
1844 int (*cmp)(const void *p), int maxclass)
1845{
1846 int count[XFRM_MAX_DEPTH] = { };
1847 int class[XFRM_MAX_DEPTH];
1848 int i;
1849
1850 for (i = 0; i < n; i++) {
1851 int c = cmp(src[i]);
1852
1853 class[i] = c;
1854 count[c]++;
1855 }
1856
1857 for (i = 2; i < maxclass; i++)
1858 count[i] += count[i - 1];
1859
1860 for (i = 0; i < n; i++) {
1861 dst[count[class[i] - 1]++] = src[i];
1862 src[i] = NULL;
1863 }
1864}
1865
1866/* Rule for xfrm_state:
1867 *
1868 * rule 1: select IPsec transport except AH
1869 * rule 2: select MIPv6 RO or inbound trigger
1870 * rule 3: select IPsec transport AH
1871 * rule 4: select IPsec tunnel
1872 * rule 5: others
1873 */
1874static int __xfrm6_state_sort_cmp(const void *p)
1875{
1876 const struct xfrm_state *v = p;
1877
1878 switch (v->props.mode) {
1879 case XFRM_MODE_TRANSPORT:
1880 if (v->id.proto != IPPROTO_AH)
1881 return 1;
1882 else
1883 return 3;
1884#if IS_ENABLED(CONFIG_IPV6_MIP6)
1885 case XFRM_MODE_ROUTEOPTIMIZATION:
1886 case XFRM_MODE_IN_TRIGGER:
1887 return 2;
1888#endif
1889 case XFRM_MODE_TUNNEL:
1890 case XFRM_MODE_BEET:
1891 return 4;
1892 }
1893 return 5;
1894}
1895
1896/* Rule for xfrm_tmpl:
1897 *
1898 * rule 1: select IPsec transport
1899 * rule 2: select MIPv6 RO or inbound trigger
1900 * rule 3: select IPsec tunnel
1901 * rule 4: others
1902 */
1903static int __xfrm6_tmpl_sort_cmp(const void *p)
1904{
1905 const struct xfrm_tmpl *v = p;
1906
1907 switch (v->mode) {
1908 case XFRM_MODE_TRANSPORT:
1909 return 1;
1910#if IS_ENABLED(CONFIG_IPV6_MIP6)
1911 case XFRM_MODE_ROUTEOPTIMIZATION:
1912 case XFRM_MODE_IN_TRIGGER:
1913 return 2;
1914#endif
1915 case XFRM_MODE_TUNNEL:
1916 case XFRM_MODE_BEET:
1917 return 3;
1918 }
1919 return 4;
1920}
1921#else
1922static inline int __xfrm6_state_sort_cmp(const void *p) { return 5; }
1923static inline int __xfrm6_tmpl_sort_cmp(const void *p) { return 4; }
1924
1925static inline void
1926__xfrm6_sort(void **dst, void **src, int n,
1927 int (*cmp)(const void *p), int maxclass)
1928{
1929 int i;
1930
1931 for (i = 0; i < n; i++)
1932 dst[i] = src[i];
1933}
1934#endif /* CONFIG_IPV6 */
1935
1936void
41a49cc3 1937xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
3aaf3915 1938 unsigned short family)
41a49cc3 1939{
3f5a95ad 1940 int i;
41a49cc3 1941
3aaf3915
FW		 1942 if (family == AF_INET6)
1943 __xfrm6_sort((void **)dst, (void **)src, n,
1944 __xfrm6_tmpl_sort_cmp, 5);
3f5a95ad
KD		 1945 else
1946 for (i = 0; i < n; i++)
1947 dst[i] = src[i];
41a49cc3 1948}
41a49cc3 1949
3aaf3915 1950void
41a49cc3
MN		 1951xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1952 unsigned short family)
1953{
3f5a95ad 1954 int i;
283bc9f3 1955
3aaf3915
FW		 1956 if (family == AF_INET6)
1957 __xfrm6_sort((void **)dst, (void **)src, n,
1958 __xfrm6_state_sort_cmp, 6);
3f5a95ad
KD		 1959 else
1960 for (i = 0; i < n; i++)
1961 dst[i] = src[i];
41a49cc3 1962}
41a49cc3
MN		 1963#endif
1964
1da177e4
LT		 1965/* Silly enough, but I'm lazy to build resolution list */
1966
bd55775c 1967static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4 1968{
fe9f1d87
SD		 1969 unsigned int h = xfrm_seq_hash(net, seq);
1970 struct xfrm_state *x;
8f126e37 1971
fe9f1d87
SD		 1972 hlist_for_each_entry_rcu(x, net->xfrm.state_byseq + h, byseq) {
1973 if (x->km.seq == seq &&
1974 (mark & x->mark.m) == x->mark.v &&
1975 x->km.state == XFRM_STATE_ACQ) {
1976 xfrm_state_hold(x);
1977 return x;
1da177e4
LT		 1978 }
1979 }
fe9f1d87 1980
1da177e4
LT		 1981 return NULL;
1982}
1983
bd55775c 1984struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
1da177e4
LT		 1985{
1986 struct xfrm_state *x;
1987
283bc9f3 1988 spin_lock_bh(&net->xfrm.xfrm_state_lock);
bd55775c 1989 x = __xfrm_find_acq_byseq(net, mark, seq);
283bc9f3 1990 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1991 return x;
1992}
1993EXPORT_SYMBOL(xfrm_find_acq_byseq);
1994
1995u32 xfrm_get_acqseq(void)
1996{
1997 u32 res;
6836b9bd 1998 static atomic_t acqseq;
1999
2000 do {
2001 res = atomic_inc_return(&acqseq);
2002 } while (!res);
1da177e4 2003
1da177e4
LT		 2004 return res;
2005}
2006EXPORT_SYMBOL(xfrm_get_acqseq);
2007
776e9dd9
FD		 2008int verify_spi_info(u8 proto, u32 min, u32 max)
2009{
2010 switch (proto) {
2011 case IPPROTO_AH:
2012 case IPPROTO_ESP:
2013 break;
2014
2015 case IPPROTO_COMP:
2016 /* IPCOMP spi is 16-bits. */
2017 if (max >= 0x10000)
2018 return -EINVAL;
2019 break;
2020
2021 default:
2022 return -EINVAL;
2023 }
2024
2025 if (min > max)
2026 return -EINVAL;
2027
2028 return 0;
2029}
2030EXPORT_SYMBOL(verify_spi_info);
2031
658b219e 2032int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
1da177e4 2033{
221df1ed 2034 struct net *net = xs_net(x);
f034b5d4 2035 unsigned int h;
1da177e4 2036 struct xfrm_state *x0;
658b219e
HX		 2037 int err = -ENOENT;
2038 __be32 minspi = htonl(low);
2039 __be32 maxspi = htonl(high);
a779d913 2040 __be32 newspi = 0;
bd55775c 2041 u32 mark = x->mark.v & x->mark.m;
1da177e4 2042
658b219e
HX		 2043 spin_lock_bh(&x->lock);
2044 if (x->km.state == XFRM_STATE_DEAD)
2045 goto unlock;
2046
2047 err = 0;
1da177e4 2048 if (x->id.spi)
658b219e
HX		 2049 goto unlock;
2050
2051 err = -ENOENT;
1da177e4
LT		 2052
2053 if (minspi == maxspi) {
bd55775c 2054 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4
LT		 2055 if (x0) {
2056 xfrm_state_put(x0);
658b219e 2057 goto unlock;
1da177e4 2058 }
a779d913 2059 newspi = minspi;
1da177e4
LT		 2060 } else {
2061 u32 spi = 0;
9b7a787d 2062 for (h = 0; h < high-low+1; h++) {
63862b5b 2063 spi = low + prandom_u32()%(high-low+1);
bd55775c 2064 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4 2065 if (x0 == NULL) {
a779d913 2066 newspi = htonl(spi);
1da177e4
LT		 2067 break;
2068 }
2069 xfrm_state_put(x0);
2070 }
2071 }
a779d913 2072 if (newspi) {
283bc9f3 2073 spin_lock_bh(&net->xfrm.xfrm_state_lock);
a779d913 2074 x->id.spi = newspi;
12604d8a 2075 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
ae3fb6d3 2076 hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
283bc9f3 2077 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
658b219e
HX		 2078
2079 err = 0;
1da177e4 2080 }
658b219e
HX		 2081
2082unlock:
2083 spin_unlock_bh(&x->lock);
2084
2085 return err;
1da177e4
LT		 2086}
2087EXPORT_SYMBOL(xfrm_alloc_spi);
2088
d3623099 2089static bool __xfrm_state_filter_match(struct xfrm_state *x,
870a2df4 2090 struct xfrm_address_filter *filter)
d3623099
ND		 2091{
2092 if (filter) {
2093 if ((filter->family == AF_INET ||
2094 filter->family == AF_INET6) &&
2095 x->props.family != filter->family)
2096 return false;
2097
2098 return addr_match(&x->props.saddr, &filter->saddr,
2099 filter->splen) &&
2100 addr_match(&x->id.daddr, &filter->daddr,
2101 filter->dplen);
2102 }
2103 return true;
2104}
2105
284fa7da 2106int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 2107 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 2108 void *data)
2109{
12a169e7
HX		 2110 struct xfrm_state *state;
2111 struct xfrm_state_walk *x;
1da177e4
LT		 2112 int err = 0;
2113
12a169e7 2114 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 2115 return 0;
2116
283bc9f3 2117 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 2118 if (list_empty(&walk->all))
284fa7da 2119 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7 2120 else
80077702 2121 x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 2122 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 2123 if (x->state == XFRM_STATE_DEAD)
4c563f76 2124 continue;
12a169e7
HX		 2125 state = container_of(x, struct xfrm_state, km);
2126 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 2127 continue;
d3623099
ND		 2128 if (!__xfrm_state_filter_match(state, walk->filter))
2129 continue;
12a169e7
HX		 2130 err = func(state, walk->seq, data);
2131 if (err) {
2132 list_move_tail(&walk->all, &x->all);
2133 goto out;
1da177e4 2134 }
12a169e7 2135 walk->seq++;
1da177e4 2136 }
12a169e7 2137 if (walk->seq == 0) {
1da177e4
LT		 2138 err = -ENOENT;
2139 goto out;
2140 }
12a169e7 2141 list_del_init(&walk->all);
1da177e4 2142out:
283bc9f3 2143 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 2144 return err;
2145}
2146EXPORT_SYMBOL(xfrm_state_walk);
2147
d3623099 2148void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
870a2df4 2149 struct xfrm_address_filter *filter)
5c182458 2150{
12a169e7 2151 INIT_LIST_HEAD(&walk->all);
5c182458 2152 walk->proto = proto;
12a169e7
HX		 2153 walk->state = XFRM_STATE_DEAD;
2154 walk->seq = 0;
d3623099 2155 walk->filter = filter;
5c182458
HX		 2156}
2157EXPORT_SYMBOL(xfrm_state_walk_init);
2158
283bc9f3 2159void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
abb81c4f 2160{
d3623099
ND		 2161 kfree(walk->filter);
2162
12a169e7 2163 if (list_empty(&walk->all))
5c182458 2164 return;
5c182458 2165
283bc9f3 2166 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 2167 list_del(&walk->all);
283bc9f3 2168 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
abb81c4f
HX		 2169}
2170EXPORT_SYMBOL(xfrm_state_walk_done);
2171
e99e88a9 2172static void xfrm_replay_timer_handler(struct timer_list *t)
f8cd5488 2173{
e99e88a9 2174 struct xfrm_state *x = from_timer(x, t, rtimer);
f8cd5488
JHS		 2175
2176 spin_lock(&x->lock);
2177
2717096a 2178 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 2179 if (xfrm_aevent_is_on(xs_net(x)))
cfc61c59 2180 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
2717096a
JHS		 2181 else
2182 x->xflags |= XFRM_TIME_DEFER;
2183 }
f8cd5488
JHS		 2184
2185 spin_unlock(&x->lock);
2186}
2187
df01812e 2188static LIST_HEAD(xfrm_km_list);
1da177e4 2189
214e005b 2190void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4
LT		 2191{
2192 struct xfrm_mgr *km;
2193
85168c00
CW		 2194 rcu_read_lock();
2195 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 2196 if (km->notify_policy)
2197 km->notify_policy(xp, dir, c);
85168c00 2198 rcu_read_unlock();
26b15dad 2199}
1da177e4 2200
214e005b 2201void km_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2202{
2203 struct xfrm_mgr *km;
85168c00
CW		 2204 rcu_read_lock();
2205 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 2206 if (km->notify)
2207 km->notify(x, c);
85168c00 2208 rcu_read_unlock();
26b15dad
JHS		 2209}
2210
2211EXPORT_SYMBOL(km_policy_notify);
2212EXPORT_SYMBOL(km_state_notify);
2213
15e47304 2214void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
26b15dad
JHS		 2215{
2216 struct km_event c;
2217
bf08867f 2218 c.data.hard = hard;
15e47304 2219 c.portid = portid;
f60f6b8f 2220 c.event = XFRM_MSG_EXPIRE;
26b15dad 2221 km_state_notify(x, &c);
1da177e4
LT		 2222}
2223
53bc6b4d 2224EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 2225/*
2226 * We send to all registered managers regardless of failure
2227 * We are happy with one success
2228*/
980ebd25 2229int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 2230{
26b15dad 2231 int err = -EINVAL, acqret;
1da177e4
LT		 2232 struct xfrm_mgr *km;
2233
85168c00
CW		 2234 rcu_read_lock();
2235 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
65e0736b 2236 acqret = km->acquire(x, t, pol);
26b15dad
JHS		 2237 if (!acqret)
2238 err = acqret;
1da177e4 2239 }
85168c00 2240 rcu_read_unlock();
1da177e4
LT		 2241 return err;
2242}
980ebd25 2243EXPORT_SYMBOL(km_query);
1da177e4 2244
5d36b180 2245int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 2246{
2247 int err = -EINVAL;
2248 struct xfrm_mgr *km;
2249
85168c00
CW		 2250 rcu_read_lock();
2251 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1da177e4
LT		 2252 if (km->new_mapping)
2253 err = km->new_mapping(x, ipaddr, sport);
2254 if (!err)
2255 break;
2256 }
85168c00 2257 rcu_read_unlock();
1da177e4
LT		 2258 return err;
2259}
2260EXPORT_SYMBOL(km_new_mapping);
2261
15e47304 2262void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1da177e4 2263{
26b15dad 2264 struct km_event c;
1da177e4 2265
bf08867f 2266 c.data.hard = hard;
15e47304 2267 c.portid = portid;
f60f6b8f 2268 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 2269 km_policy_notify(pol, dir, &c);
1da177e4 2270}
a70fcb0b 2271EXPORT_SYMBOL(km_policy_expired);
1da177e4 2272
2d60abc2 2273#ifdef CONFIG_XFRM_MIGRATE
183cad12
DM		 2274int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2275 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2276 const struct xfrm_kmaddress *k,
2277 const struct xfrm_encap_tmpl *encap)
80c9abaa
SS		 2278{
2279 int err = -EINVAL;
2280 int ret;
2281 struct xfrm_mgr *km;
2282
85168c00
CW		 2283 rcu_read_lock();
2284 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
80c9abaa 2285 if (km->migrate) {
8bafd730
AA		 2286 ret = km->migrate(sel, dir, type, m, num_migrate, k,
2287 encap);
80c9abaa
SS		 2288 if (!ret)
2289 err = ret;
2290 }
2291 }
85168c00 2292 rcu_read_unlock();
80c9abaa
SS		 2293 return err;
2294}
2295EXPORT_SYMBOL(km_migrate);
2d60abc2 2296#endif
80c9abaa 2297
db983c11 2298int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2299{
2300 int err = -EINVAL;
2301 int ret;
2302 struct xfrm_mgr *km;
2303
85168c00
CW		 2304 rcu_read_lock();
2305 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
97a64b45 2306 if (km->report) {
db983c11 2307 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 2308 if (!ret)
2309 err = ret;
2310 }
2311 }
85168c00 2312 rcu_read_unlock();
97a64b45
MN		 2313 return err;
2314}
2315EXPORT_SYMBOL(km_report);
2316
bb9cd077 2317static bool km_is_alive(const struct km_event *c)
0f24558e
HG		 2318{
2319 struct xfrm_mgr *km;
2320 bool is_alive = false;
2321
2322 rcu_read_lock();
2323 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2324 if (km->is_alive && km->is_alive(c)) {
2325 is_alive = true;
2326 break;
2327 }
2328 }
2329 rcu_read_unlock();
2330
2331 return is_alive;
2332}
0f24558e 2333
c9e7c76d
DS		 2334#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
2335static DEFINE_SPINLOCK(xfrm_translator_lock);
2336static struct xfrm_translator __rcu *xfrm_translator;
2337
2338struct xfrm_translator *xfrm_get_translator(void)
2339{
2340 struct xfrm_translator *xtr;
2341
2342 rcu_read_lock();
2343 xtr = rcu_dereference(xfrm_translator);
2344 if (unlikely(!xtr))
2345 goto out;
2346 if (!try_module_get(xtr->owner))
2347 xtr = NULL;
2348out:
2349 rcu_read_unlock();
2350 return xtr;
2351}
2352EXPORT_SYMBOL_GPL(xfrm_get_translator);
2353
2354void xfrm_put_translator(struct xfrm_translator *xtr)
2355{
2356 module_put(xtr->owner);
2357}
2358EXPORT_SYMBOL_GPL(xfrm_put_translator);
2359
2360int xfrm_register_translator(struct xfrm_translator *xtr)
2361{
2362 int err = 0;
2363
2364 spin_lock_bh(&xfrm_translator_lock);
2365 if (unlikely(xfrm_translator != NULL))
2366 err = -EEXIST;
2367 else
2368 rcu_assign_pointer(xfrm_translator, xtr);
2369 spin_unlock_bh(&xfrm_translator_lock);
2370
2371 return err;
2372}
2373EXPORT_SYMBOL_GPL(xfrm_register_translator);
2374
2375int xfrm_unregister_translator(struct xfrm_translator *xtr)
2376{
2377 int err = 0;
2378
2379 spin_lock_bh(&xfrm_translator_lock);
2380 if (likely(xfrm_translator != NULL)) {
2381 if (rcu_access_pointer(xfrm_translator) != xtr)
2382 err = -EINVAL;
2383 else
2384 RCU_INIT_POINTER(xfrm_translator, NULL);
2385 }
2386 spin_unlock_bh(&xfrm_translator_lock);
2387 synchronize_rcu();
2388
2389 return err;
2390}
2391EXPORT_SYMBOL_GPL(xfrm_unregister_translator);
2392#endif
2393
c6d1b26a 2394int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
1da177e4
LT		 2395{
2396 int err;
2397 u8 *data;
2398 struct xfrm_mgr *km;
2399 struct xfrm_policy *pol = NULL;
2400
c6d1b26a 2401 if (sockptr_is_null(optval) && !optlen) {
be8f8284
LC		 2402 xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
2403 xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
2404 __sk_dst_reset(sk);
2405 return 0;
2406 }
2407
1da177e4
LT		 2408 if (optlen <= 0 || optlen > PAGE_SIZE)
2409 return -EMSGSIZE;
2410
c6d1b26a 2411 data = memdup_sockptr(optval, optlen);
a133d930
GT		 2412 if (IS_ERR(data))
2413 return PTR_ERR(data);
1da177e4 2414
96392ee5
DS		 2415 if (in_compat_syscall()) {
2416 struct xfrm_translator *xtr = xfrm_get_translator();
2417
48f486e1
YK		 2418 if (!xtr) {
2419 kfree(data);
96392ee5 2420 return -EOPNOTSUPP;
48f486e1 2421 }
96392ee5
DS		 2422
2423 err = xtr->xlate_user_policy_sockptr(&data, optlen);
2424 xfrm_put_translator(xtr);
2425 if (err) {
2426 kfree(data);
2427 return err;
2428 }
2429 }
2430
1da177e4 2431 err = -EINVAL;
85168c00
CW		 2432 rcu_read_lock();
2433 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
cb969f07 2434 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 2435 optlen, &err);
2436 if (err >= 0)
2437 break;
2438 }
85168c00 2439 rcu_read_unlock();
1da177e4
LT		 2440
2441 if (err >= 0) {
2442 xfrm_sk_policy_insert(sk, err, pol);
2443 xfrm_pol_put(pol);
2b06cdf3 2444 __sk_dst_reset(sk);
1da177e4
LT		 2445 err = 0;
2446 }
2447
1da177e4
LT		 2448 kfree(data);
2449 return err;
2450}
2451EXPORT_SYMBOL(xfrm_user_policy);
2452
85168c00
CW		 2453static DEFINE_SPINLOCK(xfrm_km_lock);
2454
1da177e4
LT		 2455int xfrm_register_km(struct xfrm_mgr *km)
2456{
85168c00
CW		 2457 spin_lock_bh(&xfrm_km_lock);
2458 list_add_tail_rcu(&km->list, &xfrm_km_list);
2459 spin_unlock_bh(&xfrm_km_lock);
1da177e4
LT		 2460 return 0;
2461}
2462EXPORT_SYMBOL(xfrm_register_km);
2463
2464int xfrm_unregister_km(struct xfrm_mgr *km)
2465{
85168c00
CW		 2466 spin_lock_bh(&xfrm_km_lock);
2467 list_del_rcu(&km->list);
2468 spin_unlock_bh(&xfrm_km_lock);
2469 synchronize_rcu();
1da177e4
LT		 2470 return 0;
2471}
2472EXPORT_SYMBOL(xfrm_unregister_km);
2473
2474int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
2475{
2476 int err = 0;
423826a7
FW		 2477
2478 if (WARN_ON(afinfo->family >= NPROTO))
1da177e4 2479 return -EAFNOSUPPORT;
423826a7 2480
44abdc30 2481 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4 2482 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
f31e8d4f 2483 err = -EEXIST;
edcd5821 2484 else
44abdc30
CW		 2485 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
2486 spin_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 2487 return err;
2488}
2489EXPORT_SYMBOL(xfrm_state_register_afinfo);
2490
2491int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
2492{
423826a7
FW		 2493 int err = 0, family = afinfo->family;
2494
2495 if (WARN_ON(family >= NPROTO))
1da177e4 2496 return -EAFNOSUPPORT;
423826a7 2497
44abdc30 2498 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4 2499 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
423826a7 2500 if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
1da177e4 2501 err = -EINVAL;
edcd5821 2502 else
44abdc30 2503 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1da177e4 2504 }
44abdc30
CW		 2505 spin_unlock_bh(&xfrm_state_afinfo_lock);
2506 synchronize_rcu();
1da177e4
LT		 2507 return err;
2508}
2509EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
2510
711059b9
FW		 2511struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
2512{
2513 if (unlikely(family >= NPROTO))
2514 return NULL;
2515
2516 return rcu_dereference(xfrm_state_afinfo[family]);
2517}
733a5fac 2518EXPORT_SYMBOL_GPL(xfrm_state_afinfo_get_rcu);
711059b9 2519
628e341f 2520struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 2521{
2522 struct xfrm_state_afinfo *afinfo;
2523 if (unlikely(family >= NPROTO))
2524 return NULL;
44abdc30
CW		 2525 rcu_read_lock();
2526 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
546be240 2527 if (unlikely(!afinfo))
44abdc30 2528 rcu_read_unlock();
1da177e4
LT		 2529 return afinfo;
2530}
2531
b48c05ab
SK		 2532void xfrm_flush_gc(void)
2533{
2534 flush_work(&xfrm_state_gc_work);
2535}
2536EXPORT_SYMBOL(xfrm_flush_gc);
2537
1da177e4
LT		 2538/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
2539void xfrm_state_delete_tunnel(struct xfrm_state *x)
2540{
2541 if (x->tunnel) {
2542 struct xfrm_state *t = x->tunnel;
2543
2544 if (atomic_read(&t->tunnel_users) == 2)
2545 xfrm_state_delete(t);
2546 atomic_dec(&t->tunnel_users);
f75a2804 2547 xfrm_state_put_sync(t);
1da177e4
LT		 2548 x->tunnel = NULL;
2549 }
2550}
2551EXPORT_SYMBOL(xfrm_state_delete_tunnel);
2552
b515d263 2553u32 __xfrm_state_mtu(struct xfrm_state *x, int mtu)
1da177e4 2554{
b3b73b8e 2555 const struct xfrm_type *type = READ_ONCE(x->type);
c7b37c76
FW		 2556 struct crypto_aead *aead;
2557 u32 blksize, net_adj = 0;
2558
2559 if (x->km.state != XFRM_STATE_VALID ||
2560 !type || type->proto != IPPROTO_ESP)
2561 return mtu - x->props.header_len;
2562
2563 aead = x->data;
2564 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
1da177e4 2565
c7b37c76
FW		 2566 switch (x->props.mode) {
2567 case XFRM_MODE_TRANSPORT:
2568 case XFRM_MODE_BEET:
2569 if (x->props.family == AF_INET)
2570 net_adj = sizeof(struct iphdr);
2571 else if (x->props.family == AF_INET6)
2572 net_adj = sizeof(struct ipv6hdr);
2573 break;
2574 case XFRM_MODE_TUNNEL:
2575 break;
2576 default:
2577 WARN_ON_ONCE(1);
2578 break;
2579 }
b3b73b8e 2580
c7b37c76
FW		 2581 return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
2582 net_adj) & ~(blksize - 1)) + net_adj - 2;
1da177e4 2583}
b515d263
SD		 2584EXPORT_SYMBOL_GPL(__xfrm_state_mtu);
2585
2586u32 xfrm_state_mtu(struct xfrm_state *x, int mtu)
2587{
2588 mtu = __xfrm_state_mtu(x, mtu);
2589
2590 if (x->props.family == AF_INET6 && mtu < IPV6_MIN_MTU)
2591 return IPV6_MIN_MTU;
2592
2593 return mtu;
2594}
1da177e4 2595
ffdb5211 2596int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
72cb6962 2597{
c9500d7b
FW		 2598 const struct xfrm_mode *inner_mode;
2599 const struct xfrm_mode *outer_mode;
d094cd83 2600 int family = x->props.family;
72cb6962
HX		 2601 int err;
2602
e4681747
FW		 2603 if (family == AF_INET &&
2604 xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
2605 x->props.flags |= XFRM_STATE_NOPMTUDISC;
d094cd83
HX		 2606
2607 err = -EPROTONOSUPPORT;
13996378 2608
df9dcb45
KM		 2609 if (x->sel.family != AF_UNSPEC) {
2610 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
2611 if (inner_mode == NULL)
2612 goto error;
2613
2614 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
4c145dce 2615 family != x->sel.family)
df9dcb45 2616 goto error;
df9dcb45 2617
c9500d7b 2618 x->inner_mode = *inner_mode;
df9dcb45 2619 } else {
4c145dce 2620 const struct xfrm_mode *inner_mode_iaf;
d81d2285 2621 int iafamily = AF_INET;
df9dcb45 2622
d81d2285 2623 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
df9dcb45
KM		 2624 if (inner_mode == NULL)
2625 goto error;
2626
4c145dce 2627 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL))
df9dcb45 2628 goto error;
4c145dce 2629
c9500d7b 2630 x->inner_mode = *inner_mode;
df9dcb45 2631
d81d2285
MW		 2632 if (x->props.family == AF_INET)
2633 iafamily = AF_INET6;
df9dcb45 2634
d81d2285
MW		 2635 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
2636 if (inner_mode_iaf) {
2637 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
c9500d7b 2638 x->inner_mode_iaf = *inner_mode_iaf;
df9dcb45
KM		 2639 }
2640 }
13996378 2641
d094cd83 2642 x->type = xfrm_get_type(x->id.proto, family);
72cb6962
HX		 2643 if (x->type == NULL)
2644 goto error;
2645
ffdb5211 2646 x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);
9d389d7f 2647
72cb6962
HX		 2648 err = x->type->init_state(x);
2649 if (err)
2650 goto error;
2651
c9500d7b
FW		 2652 outer_mode = xfrm_get_mode(x->props.mode, family);
2653 if (!outer_mode) {
599901c3 2654 err = -EPROTONOSUPPORT;
b59f45d0 2655 goto error;
599901c3 2656 }
b59f45d0 2657
c9500d7b 2658 x->outer_mode = *outer_mode;
a454f0cc
WY		 2659 if (init_replay) {
2660 err = xfrm_init_replay(x);
2661 if (err)
2662 goto error;
2663 }
2664
72cb6962
HX		 2665error:
2666 return err;
2667}
2668
a454f0cc
WY		 2669EXPORT_SYMBOL(__xfrm_init_state);
2670
2671int xfrm_init_state(struct xfrm_state *x)
2672{
cc01572e
YK		 2673 int err;
2674
2675 err = __xfrm_init_state(x, true, false);
2676 if (!err)
2677 x->km.state = XFRM_STATE_VALID;
2678
2679 return err;
a454f0cc
WY		 2680}
2681
72cb6962 2682EXPORT_SYMBOL(xfrm_init_state);
a716c119 2683
d62ddc21 2684int __net_init xfrm_state_init(struct net *net)
1da177e4 2685{
f034b5d4
DM		 2686 unsigned int sz;
2687
565f0fa9
MK		 2688 if (net_eq(net, &init_net))
2689 xfrm_state_cache = KMEM_CACHE(xfrm_state,
2690 SLAB_HWCACHE_ALIGN | SLAB_PANIC);
2691
9d4139c7
AD		 2692 INIT_LIST_HEAD(&net->xfrm.state_all);
2693
f034b5d4
DM		 2694 sz = sizeof(struct hlist_head) * 8;
2695
73d189dc
AD		 2696 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2697 if (!net->xfrm.state_bydst)
2698 goto out_bydst;
d320bbb3
AD		 2699 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2700 if (!net->xfrm.state_bysrc)
2701 goto out_bysrc;
b754a4fd
AD		 2702 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2703 if (!net->xfrm.state_byspi)
2704 goto out_byspi;
fe9f1d87
SD		 2705 net->xfrm.state_byseq = xfrm_hash_alloc(sz);
2706 if (!net->xfrm.state_byseq)
2707 goto out_byseq;
529983ec 2708 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 2709
0bf7c5b0 2710 net->xfrm.state_num = 0;
63082733 2711 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
283bc9f3 2712 spin_lock_init(&net->xfrm.xfrm_state_lock);
bc8e0adf
AD		 2713 seqcount_spinlock_init(&net->xfrm.xfrm_state_hash_generation,
2714 &net->xfrm.xfrm_state_lock);
d62ddc21 2715 return 0;
73d189dc 2716
fe9f1d87
SD		 2717out_byseq:
2718 xfrm_hash_free(net->xfrm.state_byspi, sz);
b754a4fd
AD		 2719out_byspi:
2720 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 2721out_bysrc:
2722 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 2723out_bydst:
2724 return -ENOMEM;
d62ddc21
AD		 2725}
2726
2727void xfrm_state_fini(struct net *net)
2728{
73d189dc
AD		 2729 unsigned int sz;
2730
7c2776ee 2731 flush_work(&net->xfrm.state_hash_work);
35db57bb 2732 flush_work(&xfrm_state_gc_work);
dbb2483b 2733 xfrm_state_flush(net, 0, false, true);
7c2776ee 2734
9d4139c7 2735 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 2736
529983ec 2737 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
fe9f1d87
SD		 2738 WARN_ON(!hlist_empty(net->xfrm.state_byseq));
2739 xfrm_hash_free(net->xfrm.state_byseq, sz);
b754a4fd
AD		 2740 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2741 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 2742 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2743 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 2744 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2745 xfrm_hash_free(net->xfrm.state_bydst, sz);
1da177e4
LT		 2746}
2747
ab5f5e8b 2748#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 2749static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2750 struct audit_buffer *audit_buf)
ab5f5e8b 2751{
68277acc
PM		 2752 struct xfrm_sec_ctx *ctx = x->security;
2753 u32 spi = ntohl(x->id.spi);
2754
2755 if (ctx)
ab5f5e8b 2756 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 2757 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b 2758
9b7a787d 2759 switch (x->props.family) {
ab5f5e8b 2760 case AF_INET:
21454aaa
HH		 2761 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2762 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 2763 break;
2764 case AF_INET6:
5b095d98 2765 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 2766 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 2767 break;
2768 }
68277acc
PM		 2769
2770 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 2771}
2772
cf35f43e
IJ		 2773static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2774 struct audit_buffer *audit_buf)
afeb14b4 2775{
b71d1d42
ED		 2776 const struct iphdr *iph4;
2777 const struct ipv6hdr *iph6;
afeb14b4
PM		 2778
2779 switch (family) {
2780 case AF_INET:
2781 iph4 = ip_hdr(skb);
21454aaa
HH		 2782 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2783 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 2784 break;
2785 case AF_INET6:
2786 iph6 = ipv6_hdr(skb);
2787 audit_log_format(audit_buf,
5b095d98 2788 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
9b7a787d 2789 &iph6->saddr, &iph6->daddr,
afeb14b4
PM		 2790 iph6->flow_lbl[0] & 0x0f,
2791 iph6->flow_lbl[1],
2792 iph6->flow_lbl[2]);
2793 break;
2794 }
2795}
2796
2e71029e 2797void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 2798{
2799 struct audit_buffer *audit_buf;
ab5f5e8b 2800
afeb14b4 2801 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 2802 if (audit_buf == NULL)
2803 return;
2e71029e 2804 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 2805 xfrm_audit_helper_sainfo(x, audit_buf);
2806 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2807 audit_log_end(audit_buf);
2808}
2809EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2810
2e71029e 2811void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 2812{
2813 struct audit_buffer *audit_buf;
ab5f5e8b 2814
afeb14b4 2815 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 2816 if (audit_buf == NULL)
2817 return;
2e71029e 2818 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 2819 xfrm_audit_helper_sainfo(x, audit_buf);
2820 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 2821 audit_log_end(audit_buf);
2822}
2823EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 2824
2825void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2826 struct sk_buff *skb)
2827{
2828 struct audit_buffer *audit_buf;
2829 u32 spi;
2830
2831 audit_buf = xfrm_audit_start("SA-replay-overflow");
2832 if (audit_buf == NULL)
2833 return;
2834 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2835 /* don't record the sequence number because it's inherent in this kind
2836 * of audit message */
2837 spi = ntohl(x->id.spi);
2838 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2839 audit_log_end(audit_buf);
2840}
2841EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2842
9fdc4883 2843void xfrm_audit_state_replay(struct xfrm_state *x,
afeb14b4
PM		 2844 struct sk_buff *skb, __be32 net_seq)
2845{
2846 struct audit_buffer *audit_buf;
2847 u32 spi;
2848
2849 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2850 if (audit_buf == NULL)
2851 return;
2852 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2853 spi = ntohl(x->id.spi);
2854 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2855 spi, spi, ntohl(net_seq));
2856 audit_log_end(audit_buf);
2857}
9fdc4883 2858EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
afeb14b4
PM		 2859
2860void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2861{
2862 struct audit_buffer *audit_buf;
2863
2864 audit_buf = xfrm_audit_start("SA-notfound");
2865 if (audit_buf == NULL)
2866 return;
2867 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2868 audit_log_end(audit_buf);
2869}
2870EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2871
2872void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2873 __be32 net_spi, __be32 net_seq)
2874{
2875 struct audit_buffer *audit_buf;
2876 u32 spi;
2877
2878 audit_buf = xfrm_audit_start("SA-notfound");
2879 if (audit_buf == NULL)
2880 return;
2881 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2882 spi = ntohl(net_spi);
2883 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2884 spi, spi, ntohl(net_seq));
2885 audit_log_end(audit_buf);
2886}
2887EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2888
2889void xfrm_audit_state_icvfail(struct xfrm_state *x,
2890 struct sk_buff *skb, u8 proto)
2891{
2892 struct audit_buffer *audit_buf;
2893 __be32 net_spi;
2894 __be32 net_seq;
2895
2896 audit_buf = xfrm_audit_start("SA-icv-failure");
2897 if (audit_buf == NULL)
2898 return;
2899 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2900 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2901 u32 spi = ntohl(net_spi);
2902 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2903 spi, spi, ntohl(net_seq));
2904 }
2905 audit_log_end(audit_buf);
2906}
2907EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 2908#endif /* CONFIG_AUDITSYSCALL */
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