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xfrm: Don't disable preemption while looking up cache state.
[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
b6459415 17#include <linux/compat.h>
1da177e4
LT		 18#include <linux/workqueue.h>
19#include <net/xfrm.h>
20#include <linux/pfkeyv2.h>
21#include <linux/ipsec.h>
22#include <linux/module.h>
f034b5d4 23#include <linux/cache.h>
68277acc 24#include <linux/audit.h>
7c0f6ba6 25#include <linux/uaccess.h>
9e0d57fd 26#include <linux/ktime.h>
5a0e3ad6 27#include <linux/slab.h>
9e0d57fd
YP		 28#include <linux/interrupt.h>
29#include <linux/kernel.h>
1da177e4 30
c7b37c76
FW		 31#include <crypto/aead.h>
32
44e36b42
DM		 33#include "xfrm_hash.h"
34
c8406998
FW		 35#define xfrm_state_deref_prot(table, net) \
36 rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
e952837f
FW		 37#define xfrm_state_deref_check(table, net) \
38 rcu_dereference_check((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
c8406998 39
35db57bb
FW		 40static void xfrm_state_gc_task(struct work_struct *work);
41
1da177e4
LT		 42/* Each xfrm_state may be linked to two tables:
43
44 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
a624c108 45 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
1da177e4
LT		 46 destination/tunnel endpoint. (output)
47 */
48
f034b5d4 49static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
565f0fa9 50static struct kmem_cache *xfrm_state_cache __ro_after_init;
f034b5d4 51
35db57bb
FW		 52static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task);
53static HLIST_HEAD(xfrm_state_gc_list);
07b87f9e 54static HLIST_HEAD(xfrm_state_dev_gc_list);
35db57bb 55
02efdff7
FW		 56static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
57{
88755e9c 58 return refcount_inc_not_zero(&x->refcnt);
02efdff7
FW		 59}
60
64d0cd00 61static inline unsigned int xfrm_dst_hash(struct net *net,
2ab38503
DM		 62 const xfrm_address_t *daddr,
63 const xfrm_address_t *saddr,
c1969f29 64 u32 reqid,
a624c108 65 unsigned short family)
f034b5d4 66{
e952837f
FW		 67 lockdep_assert_held(&net->xfrm.xfrm_state_lock);
68
64d0cd00 69 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
f034b5d4
DM		 70}
71
64d0cd00 72static inline unsigned int xfrm_src_hash(struct net *net,
2ab38503
DM		 73 const xfrm_address_t *daddr,
74 const xfrm_address_t *saddr,
44e36b42 75 unsigned short family)
f034b5d4 76{
e952837f
FW		 77 lockdep_assert_held(&net->xfrm.xfrm_state_lock);
78
64d0cd00 79 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
f034b5d4
DM		 80}
81
f034b5d4 82static inline unsigned int
2ab38503
DM		 83xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
84 __be32 spi, u8 proto, unsigned short family)
f034b5d4 85{
e952837f
FW		 86 lockdep_assert_held(&net->xfrm.xfrm_state_lock);
87
64d0cd00 88 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
f034b5d4
DM		 89}
90
fe9f1d87
SD		 91static unsigned int xfrm_seq_hash(struct net *net, u32 seq)
92{
e952837f
FW		 93 lockdep_assert_held(&net->xfrm.xfrm_state_lock);
94
fe9f1d87
SD		 95 return __xfrm_seq_hash(seq, net->xfrm.state_hmask);
96}
97
3c611d40
LR		 98#define XFRM_STATE_INSERT(by, _n, _h, _type) \
99 { \
100 struct xfrm_state *_x = NULL; \
101 \
102 if (_type != XFRM_DEV_OFFLOAD_PACKET) { \
103 hlist_for_each_entry_rcu(_x, _h, by) { \
104 if (_x->xso.type == XFRM_DEV_OFFLOAD_PACKET) \
105 continue; \
106 break; \
107 } \
108 } \
109 \
110 if (!_x || _x->xso.type == XFRM_DEV_OFFLOAD_PACKET) \
111 /* SAD is empty or consist from HW SAs only */ \
112 hlist_add_head_rcu(_n, _h); \
113 else \
114 hlist_add_before_rcu(_n, &_x->by); \
115 }
116
f034b5d4
DM		 117static void xfrm_hash_transfer(struct hlist_head *list,
118 struct hlist_head *ndsttable,
119 struct hlist_head *nsrctable,
120 struct hlist_head *nspitable,
fe9f1d87 121 struct hlist_head *nseqtable,
f034b5d4
DM		 122 unsigned int nhashmask)
123{
b67bfe0d 124 struct hlist_node *tmp;
f034b5d4
DM		 125 struct xfrm_state *x;
126
b67bfe0d 127 hlist_for_each_entry_safe(x, tmp, list, bydst) {
f034b5d4
DM		 128 unsigned int h;
129
c1969f29
DM		 130 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
131 x->props.reqid, x->props.family,
132 nhashmask);
3c611d40 133 XFRM_STATE_INSERT(bydst, &x->bydst, ndsttable + h, x->xso.type);
f034b5d4 134
667bbcb6
MN		 135 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
136 x->props.family,
f034b5d4 137 nhashmask);
3c611d40 138 XFRM_STATE_INSERT(bysrc, &x->bysrc, nsrctable + h, x->xso.type);
f034b5d4 139
7b4dc360
MN		 140 if (x->id.spi) {
141 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
142 x->id.proto, x->props.family,
143 nhashmask);
3c611d40
LR		 144 XFRM_STATE_INSERT(byspi, &x->byspi, nspitable + h,
145 x->xso.type);
7b4dc360 146 }
fe9f1d87
SD		 147
148 if (x->km.seq) {
149 h = __xfrm_seq_hash(x->km.seq, nhashmask);
3c611d40
LR		 150 XFRM_STATE_INSERT(byseq, &x->byseq, nseqtable + h,
151 x->xso.type);
fe9f1d87 152 }
f034b5d4
DM		 153 }
154}
155
63082733 156static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
f034b5d4 157{
63082733 158 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
f034b5d4
DM		 159}
160
63082733 161static void xfrm_hash_resize(struct work_struct *work)
f034b5d4 162{
63082733 163 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
fe9f1d87 164 struct hlist_head *ndst, *nsrc, *nspi, *nseq, *odst, *osrc, *ospi, *oseq;
f034b5d4
DM		 165 unsigned long nsize, osize;
166 unsigned int nhashmask, ohashmask;
167 int i;
168
63082733 169 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42 170 ndst = xfrm_hash_alloc(nsize);
f034b5d4 171 if (!ndst)
0244790c 172 return;
44e36b42 173 nsrc = xfrm_hash_alloc(nsize);
f034b5d4 174 if (!nsrc) {
44e36b42 175 xfrm_hash_free(ndst, nsize);
0244790c 176 return;
f034b5d4 177 }
44e36b42 178 nspi = xfrm_hash_alloc(nsize);
f034b5d4 179 if (!nspi) {
44e36b42
DM		 180 xfrm_hash_free(ndst, nsize);
181 xfrm_hash_free(nsrc, nsize);
0244790c 182 return;
f034b5d4 183 }
fe9f1d87
SD		 184 nseq = xfrm_hash_alloc(nsize);
185 if (!nseq) {
186 xfrm_hash_free(ndst, nsize);
187 xfrm_hash_free(nsrc, nsize);
188 xfrm_hash_free(nspi, nsize);
189 return;
190 }
f034b5d4 191
283bc9f3 192 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e88add19 193 write_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
f034b5d4
DM		 194
195 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
c8406998 196 odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
63082733 197 for (i = net->xfrm.state_hmask; i >= 0; i--)
fe9f1d87 198 xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nseq, nhashmask);
f034b5d4 199
c8406998
FW		 200 osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
201 ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
fe9f1d87 202 oseq = xfrm_state_deref_prot(net->xfrm.state_byseq, net);
63082733 203 ohashmask = net->xfrm.state_hmask;
f034b5d4 204
c8406998
FW		 205 rcu_assign_pointer(net->xfrm.state_bydst, ndst);
206 rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
207 rcu_assign_pointer(net->xfrm.state_byspi, nspi);
fe9f1d87 208 rcu_assign_pointer(net->xfrm.state_byseq, nseq);
63082733 209 net->xfrm.state_hmask = nhashmask;
f034b5d4 210
e88add19 211 write_seqcount_end(&net->xfrm.xfrm_state_hash_generation);
283bc9f3 212 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
f034b5d4
DM		 213
214 osize = (ohashmask + 1) * sizeof(struct hlist_head);
df7274eb
FW		 215
216 synchronize_rcu();
217
44e36b42
DM		 218 xfrm_hash_free(odst, osize);
219 xfrm_hash_free(osrc, osize);
220 xfrm_hash_free(ospi, osize);
fe9f1d87 221 xfrm_hash_free(oseq, osize);
f034b5d4
DM		 222}
223
44abdc30
CW		 224static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
225static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
1da177e4 226
1da177e4 227static DEFINE_SPINLOCK(xfrm_state_gc_lock);
07b87f9e 228static DEFINE_SPINLOCK(xfrm_state_dev_gc_lock);
1da177e4 229
53bc6b4d 230int __xfrm_state_delete(struct xfrm_state *x);
1da177e4 231
980ebd25 232int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
bb9cd077 233static bool km_is_alive(const struct km_event *c);
15e47304 234void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
1da177e4 235
533cb5b0 236int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 237{
7a9885b9 238 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 239 int err = 0;
240
4f518e80 241 if (!afinfo)
aa5d62cc 242 return -EAFNOSUPPORT;
4f518e80
FW		 243
244#define X(afi, T, name) do { \
245 WARN_ON((afi)->type_ ## name); \
246 (afi)->type_ ## name = (T); \
247 } while (0)
248
249 switch (type->proto) {
250 case IPPROTO_COMP:
251 X(afinfo, type, comp);
252 break;
253 case IPPROTO_AH:
254 X(afinfo, type, ah);
255 break;
256 case IPPROTO_ESP:
257 X(afinfo, type, esp);
258 break;
259 case IPPROTO_IPIP:
260 X(afinfo, type, ipip);
261 break;
262 case IPPROTO_DSTOPTS:
263 X(afinfo, type, dstopts);
264 break;
265 case IPPROTO_ROUTING:
266 X(afinfo, type, routing);
267 break;
268 case IPPROTO_IPV6:
269 X(afinfo, type, ipip6);
270 break;
271 default:
272 WARN_ON(1);
273 err = -EPROTONOSUPPORT;
274 break;
275 }
276#undef X
af5d27c4 277 rcu_read_unlock();
aa5d62cc
HX		 278 return err;
279}
280EXPORT_SYMBOL(xfrm_register_type);
281
4f518e80 282void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
aa5d62cc 283{
7a9885b9 284 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
aa5d62cc
HX		 285
286 if (unlikely(afinfo == NULL))
4f518e80
FW		 287 return;
288
289#define X(afi, T, name) do { \
290 WARN_ON((afi)->type_ ## name != (T)); \
291 (afi)->type_ ## name = NULL; \
292 } while (0)
293
294 switch (type->proto) {
295 case IPPROTO_COMP:
296 X(afinfo, type, comp);
297 break;
298 case IPPROTO_AH:
299 X(afinfo, type, ah);
300 break;
301 case IPPROTO_ESP:
302 X(afinfo, type, esp);
303 break;
304 case IPPROTO_IPIP:
305 X(afinfo, type, ipip);
306 break;
307 case IPPROTO_DSTOPTS:
308 X(afinfo, type, dstopts);
309 break;
310 case IPPROTO_ROUTING:
311 X(afinfo, type, routing);
312 break;
313 case IPPROTO_IPV6:
314 X(afinfo, type, ipip6);
315 break;
316 default:
317 WARN_ON(1);
318 break;
319 }
320#undef X
af5d27c4 321 rcu_read_unlock();
aa5d62cc
HX		 322}
323EXPORT_SYMBOL(xfrm_unregister_type);
324
533cb5b0 325static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
aa5d62cc 326{
4f518e80 327 const struct xfrm_type *type = NULL;
aa5d62cc 328 struct xfrm_state_afinfo *afinfo;
aa5d62cc
HX		 329 int modload_attempted = 0;
330
331retry:
332 afinfo = xfrm_state_get_afinfo(family);
333 if (unlikely(afinfo == NULL))
334 return NULL;
aa5d62cc 335
4f518e80
FW		 336 switch (proto) {
337 case IPPROTO_COMP:
338 type = afinfo->type_comp;
339 break;
340 case IPPROTO_AH:
341 type = afinfo->type_ah;
342 break;
343 case IPPROTO_ESP:
344 type = afinfo->type_esp;
345 break;
346 case IPPROTO_IPIP:
347 type = afinfo->type_ipip;
348 break;
349 case IPPROTO_DSTOPTS:
350 type = afinfo->type_dstopts;
351 break;
352 case IPPROTO_ROUTING:
353 type = afinfo->type_routing;
354 break;
355 case IPPROTO_IPV6:
356 type = afinfo->type_ipip6;
357 break;
358 default:
359 break;
360 }
361
aa5d62cc
HX		 362 if (unlikely(type && !try_module_get(type->owner)))
363 type = NULL;
75cda62d
FW		 364
365 rcu_read_unlock();
366
aa5d62cc 367 if (!type && !modload_attempted) {
aa5d62cc
HX		 368 request_module("xfrm-type-%d-%d", family, proto);
369 modload_attempted = 1;
370 goto retry;
371 }
372
aa5d62cc
HX		 373 return type;
374}
375
533cb5b0 376static void xfrm_put_type(const struct xfrm_type *type)
aa5d62cc
HX		 377{
378 module_put(type->owner);
379}
380
9d389d7f
SK		 381int xfrm_register_type_offload(const struct xfrm_type_offload *type,
382 unsigned short family)
383{
384 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
9d389d7f
SK		 385 int err = 0;
386
387 if (unlikely(afinfo == NULL))
388 return -EAFNOSUPPORT;
4f518e80
FW		 389
390 switch (type->proto) {
391 case IPPROTO_ESP:
392 WARN_ON(afinfo->type_offload_esp);
393 afinfo->type_offload_esp = type;
394 break;
395 default:
396 WARN_ON(1);
397 err = -EPROTONOSUPPORT;
398 break;
399 }
400
9d389d7f
SK		 401 rcu_read_unlock();
402 return err;
403}
404EXPORT_SYMBOL(xfrm_register_type_offload);
405
4f518e80
FW		 406void xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
407 unsigned short family)
9d389d7f
SK		 408{
409 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
9d389d7f
SK		 410
411 if (unlikely(afinfo == NULL))
4f518e80
FW		 412 return;
413
414 switch (type->proto) {
415 case IPPROTO_ESP:
416 WARN_ON(afinfo->type_offload_esp != type);
417 afinfo->type_offload_esp = NULL;
418 break;
419 default:
420 WARN_ON(1);
421 break;
422 }
9d389d7f 423 rcu_read_unlock();
9d389d7f
SK		 424}
425EXPORT_SYMBOL(xfrm_unregister_type_offload);
426
ffdb5211
IT		 427static const struct xfrm_type_offload *
428xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
9d389d7f 429{
4f518e80 430 const struct xfrm_type_offload *type = NULL;
9d389d7f 431 struct xfrm_state_afinfo *afinfo;
9d389d7f 432
ffdb5211 433retry:
9d389d7f
SK		 434 afinfo = xfrm_state_get_afinfo(family);
435 if (unlikely(afinfo == NULL))
436 return NULL;
9d389d7f 437
4f518e80
FW		 438 switch (proto) {
439 case IPPROTO_ESP:
440 type = afinfo->type_offload_esp;
441 break;
442 default:
443 break;
444 }
445
9d389d7f
SK		 446 if ((type && !try_module_get(type->owner)))
447 type = NULL;
448
2f10a61c
SD		 449 rcu_read_unlock();
450
ffdb5211
IT		 451 if (!type && try_load) {
452 request_module("xfrm-offload-%d-%d", family, proto);
545d8ae7 453 try_load = false;
ffdb5211
IT		 454 goto retry;
455 }
456
9d389d7f
SK		 457 return type;
458}
459
460static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
461{
462 module_put(type->owner);
463}
464
4c145dce
FW		 465static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
466 [XFRM_MODE_BEET] = {
467 .encap = XFRM_MODE_BEET,
468 .flags = XFRM_MODE_FLAG_TUNNEL,
469 .family = AF_INET,
470 },
471 [XFRM_MODE_TRANSPORT] = {
472 .encap = XFRM_MODE_TRANSPORT,
473 .family = AF_INET,
474 },
475 [XFRM_MODE_TUNNEL] = {
476 .encap = XFRM_MODE_TUNNEL,
477 .flags = XFRM_MODE_FLAG_TUNNEL,
478 .family = AF_INET,
479 },
480};
481
482static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
483 [XFRM_MODE_BEET] = {
484 .encap = XFRM_MODE_BEET,
485 .flags = XFRM_MODE_FLAG_TUNNEL,
486 .family = AF_INET6,
487 },
488 [XFRM_MODE_ROUTEOPTIMIZATION] = {
489 .encap = XFRM_MODE_ROUTEOPTIMIZATION,
490 .family = AF_INET6,
491 },
492 [XFRM_MODE_TRANSPORT] = {
493 .encap = XFRM_MODE_TRANSPORT,
494 .family = AF_INET6,
495 },
496 [XFRM_MODE_TUNNEL] = {
497 .encap = XFRM_MODE_TUNNEL,
498 .flags = XFRM_MODE_FLAG_TUNNEL,
499 .family = AF_INET6,
500 },
501};
502
503static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
504{
505 const struct xfrm_mode *mode;
aa5d62cc
HX		 506
507 if (unlikely(encap >= XFRM_MODE_MAX))
508 return NULL;
509
4c145dce
FW		 510 switch (family) {
511 case AF_INET:
512 mode = &xfrm4_mode_map[encap];
513 if (mode->family == family)
514 return mode;
515 break;
516 case AF_INET6:
517 mode = &xfrm6_mode_map[encap];
518 if (mode->family == family)
519 return mode;
520 break;
521 default:
522 break;
aa5d62cc
HX		 523 }
524
4c145dce 525 return NULL;
aa5d62cc
HX		 526}
527
4a135e53
MK		 528void xfrm_state_free(struct xfrm_state *x)
529{
530 kmem_cache_free(xfrm_state_cache, x);
531}
532EXPORT_SYMBOL(xfrm_state_free);
533
f75a2804 534static void ___xfrm_state_destroy(struct xfrm_state *x)
1da177e4 535{
671422b2 536 hrtimer_cancel(&x->mtimer);
a47f0ce0 537 del_timer_sync(&x->rtimer);
b5884793 538 kfree(x->aead);
a51482bd
JJ		 539 kfree(x->aalg);
540 kfree(x->ealg);
541 kfree(x->calg);
542 kfree(x->encap);
060f02a3 543 kfree(x->coaddr);
d8647b79
SK		 544 kfree(x->replay_esn);
545 kfree(x->preplay_esn);
9d389d7f
SK		 546 if (x->type_offload)
547 xfrm_put_type_offload(x->type_offload);
1da177e4
LT		 548 if (x->type) {
549 x->type->destructor(x);
550 xfrm_put_type(x->type);
551 }
86c6739e
SK		 552 if (x->xfrag.page)
553 put_page(x->xfrag.page);
d77e38e6 554 xfrm_dev_state_free(x);
df71837d 555 security_xfrm_state_free(x);
4a135e53 556 xfrm_state_free(x);
1da177e4
LT		 557}
558
c7837144 559static void xfrm_state_gc_task(struct work_struct *work)
1da177e4 560{
12a169e7 561 struct xfrm_state *x;
b67bfe0d 562 struct hlist_node *tmp;
12a169e7 563 struct hlist_head gc_list;
1da177e4 564
1da177e4 565 spin_lock_bh(&xfrm_state_gc_lock);
35db57bb 566 hlist_move_list(&xfrm_state_gc_list, &gc_list);
1da177e4
LT		 567 spin_unlock_bh(&xfrm_state_gc_lock);
568
df7274eb
FW		 569 synchronize_rcu();
570
b67bfe0d 571 hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
f75a2804 572 ___xfrm_state_destroy(x);
1da177e4
LT		 573}
574
3e94c2dc 575static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
1da177e4 576{
671422b2
TG		 577 struct xfrm_state *x = container_of(me, struct xfrm_state, mtimer);
578 enum hrtimer_restart ret = HRTIMER_NORESTART;
386c5680
AB		 579 time64_t now = ktime_get_real_seconds();
580 time64_t next = TIME64_MAX;
1da177e4 581 int warn = 0;
161a09e7 582 int err = 0;
1da177e4
LT		 583
584 spin_lock(&x->lock);
fd2bc419 585 xfrm_dev_state_update_stats(x);
f3da86dc 586
1da177e4
LT		 587 if (x->km.state == XFRM_STATE_DEAD)
588 goto out;
589 if (x->km.state == XFRM_STATE_EXPIRED)
590 goto expired;
591 if (x->lft.hard_add_expires_seconds) {
195e4aac 592 time64_t tmo = x->lft.hard_add_expires_seconds +
1da177e4 593 x->curlft.add_time - now;
e3c0d047
FD		 594 if (tmo <= 0) {
595 if (x->xflags & XFRM_SOFT_EXPIRE) {
596 /* enter hard expire without soft expire first?!
597 * setting a new date could trigger this.
1365e547 598 * workaround: fix x->curflt.add_time by below:
e3c0d047
FD		 599 */
600 x->curlft.add_time = now - x->saved_tmo - 1;
601 tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
602 } else
603 goto expired;
604 }
1da177e4
LT		 605 if (tmo < next)
606 next = tmo;
607 }
608 if (x->lft.hard_use_expires_seconds) {
195e4aac 609 time64_t tmo = x->lft.hard_use_expires_seconds +
0a9e5794 610 (READ_ONCE(x->curlft.use_time) ? : now) - now;
1da177e4
LT		 611 if (tmo <= 0)
612 goto expired;
613 if (tmo < next)
614 next = tmo;
615 }
616 if (x->km.dying)
617 goto resched;
618 if (x->lft.soft_add_expires_seconds) {
195e4aac 619 time64_t tmo = x->lft.soft_add_expires_seconds +
1da177e4 620 x->curlft.add_time - now;
e3c0d047 621 if (tmo <= 0) {
1da177e4 622 warn = 1;
e3c0d047
FD		 623 x->xflags &= ~XFRM_SOFT_EXPIRE;
624 } else if (tmo < next) {
1da177e4 625 next = tmo;
e3c0d047
FD		 626 x->xflags |= XFRM_SOFT_EXPIRE;
627 x->saved_tmo = tmo;
628 }
1da177e4
LT		 629 }
630 if (x->lft.soft_use_expires_seconds) {
195e4aac 631 time64_t tmo = x->lft.soft_use_expires_seconds +
0a9e5794 632 (READ_ONCE(x->curlft.use_time) ? : now) - now;
1da177e4
LT		 633 if (tmo <= 0)
634 warn = 1;
635 else if (tmo < next)
636 next = tmo;
637 }
638
4666faab 639 x->km.dying = warn;
1da177e4 640 if (warn)
53bc6b4d 641 km_state_expired(x, 0, 0);
1da177e4 642resched:
386c5680 643 if (next != TIME64_MAX) {
671422b2
TG		 644 hrtimer_forward_now(&x->mtimer, ktime_set(next, 0));
645 ret = HRTIMER_RESTART;
9e0d57fd 646 }
a47f0ce0 647
1da177e4
LT		 648 goto out;
649
650expired:
5b8ef341 651 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
1da177e4 652 x->km.state = XFRM_STATE_EXPIRED;
161a09e7
JL		 653
654 err = __xfrm_state_delete(x);
0806ae4c 655 if (!err)
53bc6b4d 656 km_state_expired(x, 1, 0);
1da177e4 657
2e71029e 658 xfrm_audit_state_delete(x, err ? 0 : 1, true);
161a09e7 659
1da177e4
LT		 660out:
661 spin_unlock(&x->lock);
671422b2 662 return ret;
1da177e4
LT		 663}
664
e99e88a9 665static void xfrm_replay_timer_handler(struct timer_list *t);
0ac84752 666
673c09be 667struct xfrm_state *xfrm_state_alloc(struct net *net)
1da177e4
LT		 668{
669 struct xfrm_state *x;
670
a4c278d1 671 x = kmem_cache_zalloc(xfrm_state_cache, GFP_ATOMIC);
1da177e4
LT		 672
673 if (x) {
673c09be 674 write_pnet(&x->xs_net, net);
88755e9c 675 refcount_set(&x->refcnt, 1);
1da177e4 676 atomic_set(&x->tunnel_users, 0);
12a169e7 677 INIT_LIST_HEAD(&x->km.all);
0045e3d8 678 INIT_HLIST_NODE(&x->state_cache);
8f126e37
DM		 679 INIT_HLIST_NODE(&x->bydst);
680 INIT_HLIST_NODE(&x->bysrc);
681 INIT_HLIST_NODE(&x->byspi);
fe9f1d87 682 INIT_HLIST_NODE(&x->byseq);
671422b2
TG		 683 hrtimer_init(&x->mtimer, CLOCK_BOOTTIME, HRTIMER_MODE_ABS_SOFT);
684 x->mtimer.function = xfrm_timer_handler;
e99e88a9 685 timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
386c5680 686 x->curlft.add_time = ktime_get_real_seconds();
1da177e4
LT		 687 x->lft.soft_byte_limit = XFRM_INF;
688 x->lft.soft_packet_limit = XFRM_INF;
689 x->lft.hard_byte_limit = XFRM_INF;
690 x->lft.hard_packet_limit = XFRM_INF;
f8cd5488
JHS		 691 x->replay_maxage = 0;
692 x->replay_maxdiff = 0;
1ddf9916 693 x->pcpu_num = UINT_MAX;
1da177e4
LT		 694 spin_lock_init(&x->lock);
695 }
696 return x;
697}
698EXPORT_SYMBOL(xfrm_state_alloc);
699
07b87f9e
SK		 700#ifdef CONFIG_XFRM_OFFLOAD
701void xfrm_dev_state_delete(struct xfrm_state *x)
702{
703 struct xfrm_dev_offload *xso = &x->xso;
704 struct net_device *dev = READ_ONCE(xso->dev);
705
706 if (dev) {
707 dev->xfrmdev_ops->xdo_dev_state_delete(x);
708 spin_lock_bh(&xfrm_state_dev_gc_lock);
709 hlist_add_head(&x->dev_gclist, &xfrm_state_dev_gc_list);
710 spin_unlock_bh(&xfrm_state_dev_gc_lock);
711 }
712}
2d531775 713EXPORT_SYMBOL_GPL(xfrm_dev_state_delete);
07b87f9e
SK		 714
715void xfrm_dev_state_free(struct xfrm_state *x)
716{
717 struct xfrm_dev_offload *xso = &x->xso;
718 struct net_device *dev = READ_ONCE(xso->dev);
719
720 if (dev && dev->xfrmdev_ops) {
721 spin_lock_bh(&xfrm_state_dev_gc_lock);
722 if (!hlist_unhashed(&x->dev_gclist))
723 hlist_del(&x->dev_gclist);
724 spin_unlock_bh(&xfrm_state_dev_gc_lock);
725
726 if (dev->xfrmdev_ops->xdo_dev_state_free)
727 dev->xfrmdev_ops->xdo_dev_state_free(x);
728 WRITE_ONCE(xso->dev, NULL);
729 xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
730 netdev_put(dev, &xso->dev_tracker);
731 }
732}
733#endif
734
f75a2804 735void __xfrm_state_destroy(struct xfrm_state *x, bool sync)
1da177e4 736{
547b792c 737 WARN_ON(x->km.state != XFRM_STATE_DEAD);
1da177e4 738
f75a2804
CW		 739 if (sync) {
740 synchronize_rcu();
741 ___xfrm_state_destroy(x);
742 } else {
743 spin_lock_bh(&xfrm_state_gc_lock);
744 hlist_add_head(&x->gclist, &xfrm_state_gc_list);
745 spin_unlock_bh(&xfrm_state_gc_lock);
746 schedule_work(&xfrm_state_gc_work);
747 }
1da177e4
LT		 748}
749EXPORT_SYMBOL(__xfrm_state_destroy);
750
53bc6b4d 751int __xfrm_state_delete(struct xfrm_state *x)
1da177e4 752{
98806f75 753 struct net *net = xs_net(x);
26b15dad
JHS		 754 int err = -ESRCH;
755
1da177e4
LT		 756 if (x->km.state != XFRM_STATE_DEAD) {
757 x->km.state = XFRM_STATE_DEAD;
0045e3d8 758
283bc9f3 759 spin_lock(&net->xfrm.xfrm_state_lock);
12a169e7 760 list_del(&x->km.all);
ae3fb6d3
FW		 761 hlist_del_rcu(&x->bydst);
762 hlist_del_rcu(&x->bysrc);
fe9f1d87
SD		 763 if (x->km.seq)
764 hlist_del_rcu(&x->byseq);
0045e3d8
SK		 765 if (!hlist_unhashed(&x->state_cache))
766 hlist_del_rcu(&x->state_cache);
81a331a0
SK		 767 if (!hlist_unhashed(&x->state_cache_input))
768 hlist_del_rcu(&x->state_cache_input);
769
a47f0ce0 770 if (x->id.spi)
ae3fb6d3 771 hlist_del_rcu(&x->byspi);
98806f75 772 net->xfrm.state_num--;
f531d13b 773 xfrm_nat_keepalive_state_updated(x);
283bc9f3 774 spin_unlock(&net->xfrm.xfrm_state_lock);
1da177e4 775
e27cca96
SD		 776 if (x->encap_sk)
777 sock_put(rcu_dereference_raw(x->encap_sk));
778
d77e38e6
SK		 779 xfrm_dev_state_delete(x);
780
1da177e4
LT		 781 /* All xfrm_state objects are created by xfrm_state_alloc.
782 * The xfrm_state_alloc call gives a reference, and that
783 * is what we are dropping here.
784 */
5dba4797 785 xfrm_state_put(x);
26b15dad 786 err = 0;
1da177e4 787 }
26b15dad
JHS		 788
789 return err;
1da177e4 790}
53bc6b4d 791EXPORT_SYMBOL(__xfrm_state_delete);
1da177e4 792
26b15dad 793int xfrm_state_delete(struct xfrm_state *x)
1da177e4 794{
26b15dad
JHS		 795 int err;
796
1da177e4 797 spin_lock_bh(&x->lock);
26b15dad 798 err = __xfrm_state_delete(x);
1da177e4 799 spin_unlock_bh(&x->lock);
26b15dad
JHS		 800
801 return err;
1da177e4
LT		 802}
803EXPORT_SYMBOL(xfrm_state_delete);
804
4aa2e62c
JL		 805#ifdef CONFIG_SECURITY_NETWORK_XFRM
806static inline int
2e71029e 807xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
1da177e4 808{
4aa2e62c
JL		 809 int i, err = 0;
810
0e602451 811 for (i = 0; i <= net->xfrm.state_hmask; i++) {
4aa2e62c
JL		 812 struct xfrm_state *x;
813
b67bfe0d 814 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
4aa2e62c
JL		 815 if (xfrm_id_proto_match(x->id.proto, proto) &&
816 (err = security_xfrm_state_delete(x)) != 0) {
2e71029e 817 xfrm_audit_state_delete(x, 0, task_valid);
4aa2e62c
JL		 818 return err;
819 }
820 }
821 }
822
823 return err;
824}
d77e38e6
SK		 825
826static inline int
827xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
828{
829 int i, err = 0;
830
831 for (i = 0; i <= net->xfrm.state_hmask; i++) {
832 struct xfrm_state *x;
87e0a94e 833 struct xfrm_dev_offload *xso;
d77e38e6
SK		 834
835 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
836 xso = &x->xso;
837
838 if (xso->dev == dev &&
839 (err = security_xfrm_state_delete(x)) != 0) {
840 xfrm_audit_state_delete(x, 0, task_valid);
841 return err;
842 }
843 }
844 }
845
846 return err;
847}
4aa2e62c
JL		 848#else
849static inline int
2e71029e 850xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
4aa2e62c
JL		 851{
852 return 0;
853}
d77e38e6
SK		 854
855static inline int
856xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
857{
858 return 0;
859}
4aa2e62c
JL		 860#endif
861
f75a2804 862int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync)
4aa2e62c 863{
9e64cc95 864 int i, err = 0, cnt = 0;
1da177e4 865
283bc9f3 866 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2e71029e 867 err = xfrm_state_flush_secctx_check(net, proto, task_valid);
4aa2e62c
JL		 868 if (err)
869 goto out;
870
9e64cc95 871 err = -ESRCH;
0e602451 872 for (i = 0; i <= net->xfrm.state_hmask; i++) {
8f126e37 873 struct xfrm_state *x;
1da177e4 874restart:
b67bfe0d 875 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
1da177e4 876 if (!xfrm_state_kern(x) &&
5794708f 877 xfrm_id_proto_match(x->id.proto, proto)) {
1da177e4 878 xfrm_state_hold(x);
283bc9f3 879 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 880
161a09e7 881 err = xfrm_state_delete(x);
ab5f5e8b 882 xfrm_audit_state_delete(x, err ? 0 : 1,
2e71029e 883 task_valid);
f75a2804
CW		 884 if (sync)
885 xfrm_state_put_sync(x);
886 else
887 xfrm_state_put(x);
9e64cc95
JHS		 888 if (!err)
889 cnt++;
1da177e4 890
283bc9f3 891 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 892 goto restart;
893 }
894 }
895 }
dd269db8
AS		 896out:
897 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
e4db5b61 898 if (cnt)
9e64cc95 899 err = 0;
e4db5b61 900
4aa2e62c 901 return err;
1da177e4
LT		 902}
903EXPORT_SYMBOL(xfrm_state_flush);
904
d77e38e6
SK		 905int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
906{
07b87f9e
SK		 907 struct xfrm_state *x;
908 struct hlist_node *tmp;
909 struct xfrm_dev_offload *xso;
d77e38e6
SK		 910 int i, err = 0, cnt = 0;
911
912 spin_lock_bh(&net->xfrm.xfrm_state_lock);
913 err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
914 if (err)
915 goto out;
916
917 err = -ESRCH;
918 for (i = 0; i <= net->xfrm.state_hmask; i++) {
d77e38e6
SK		 919restart:
920 hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
921 xso = &x->xso;
922
923 if (!xfrm_state_kern(x) && xso->dev == dev) {
924 xfrm_state_hold(x);
925 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
926
927 err = xfrm_state_delete(x);
07b87f9e
SK		 928 xfrm_dev_state_free(x);
929
d77e38e6
SK		 930 xfrm_audit_state_delete(x, err ? 0 : 1,
931 task_valid);
932 xfrm_state_put(x);
933 if (!err)
934 cnt++;
935
936 spin_lock_bh(&net->xfrm.xfrm_state_lock);
937 goto restart;
938 }
939 }
940 }
941 if (cnt)
942 err = 0;
943
944out:
945 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
07b87f9e
SK		 946
947 spin_lock_bh(&xfrm_state_dev_gc_lock);
948restart_gc:
949 hlist_for_each_entry_safe(x, tmp, &xfrm_state_dev_gc_list, dev_gclist) {
950 xso = &x->xso;
951
952 if (xso->dev == dev) {
953 spin_unlock_bh(&xfrm_state_dev_gc_lock);
954 xfrm_dev_state_free(x);
955 spin_lock_bh(&xfrm_state_dev_gc_lock);
956 goto restart_gc;
957 }
958
959 }
960 spin_unlock_bh(&xfrm_state_dev_gc_lock);
961
962 xfrm_flush_gc();
963
d77e38e6
SK		 964 return err;
965}
966EXPORT_SYMBOL(xfrm_dev_state_flush);
967
e071041b 968void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
28d8909b 969{
283bc9f3 970 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e071041b 971 si->sadcnt = net->xfrm.state_num;
ca92e173 972 si->sadhcnt = net->xfrm.state_hmask + 1;
28d8909b 973 si->sadhmcnt = xfrm_state_hashmax;
283bc9f3 974 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
28d8909b
JHS		 975}
976EXPORT_SYMBOL(xfrm_sad_getinfo);
977
bac95935
FW		 978static void
979__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
980{
981 const struct flowi4 *fl4 = &fl->u.ip4;
982
983 sel->daddr.a4 = fl4->daddr;
984 sel->saddr.a4 = fl4->saddr;
985 sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
986 sel->dport_mask = htons(0xffff);
987 sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
988 sel->sport_mask = htons(0xffff);
989 sel->family = AF_INET;
990 sel->prefixlen_d = 32;
991 sel->prefixlen_s = 32;
992 sel->proto = fl4->flowi4_proto;
993 sel->ifindex = fl4->flowi4_oif;
994}
995
996static void
997__xfrm6_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
998{
999 const struct flowi6 *fl6 = &fl->u.ip6;
1000
1001 /* Initialize temporary selector matching only to current session. */
1002 *(struct in6_addr *)&sel->daddr = fl6->daddr;
1003 *(struct in6_addr *)&sel->saddr = fl6->saddr;
1004 sel->dport = xfrm_flowi_dport(fl, &fl6->uli);
1005 sel->dport_mask = htons(0xffff);
1006 sel->sport = xfrm_flowi_sport(fl, &fl6->uli);
1007 sel->sport_mask = htons(0xffff);
1008 sel->family = AF_INET6;
1009 sel->prefixlen_d = 128;
1010 sel->prefixlen_s = 128;
1011 sel->proto = fl6->flowi6_proto;
1012 sel->ifindex = fl6->flowi6_oif;
1013}
1014
711059b9 1015static void
1a898592 1016xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
04686013 1017 const struct xfrm_tmpl *tmpl,
33765d06 1018 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
8444cf71 1019 unsigned short family)
1da177e4 1020{
bac95935
FW		 1021 switch (family) {
1022 case AF_INET:
1023 __xfrm4_init_tempsel(&x->sel, fl);
1024 break;
1025 case AF_INET6:
1026 __xfrm6_init_tempsel(&x->sel, fl);
1027 break;
1028 }
1029
5c1b9ab3 1030 x->id = tmpl->id;
bac95935 1031
5c1b9ab3
FW		 1032 switch (tmpl->encap_family) {
1033 case AF_INET:
1034 if (x->id.daddr.a4 == 0)
1035 x->id.daddr.a4 = daddr->a4;
1036 x->props.saddr = tmpl->saddr;
1037 if (x->props.saddr.a4 == 0)
1038 x->props.saddr.a4 = saddr->a4;
1039 break;
1040 case AF_INET6:
1041 if (ipv6_addr_any((struct in6_addr *)&x->id.daddr))
1042 memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
1043 memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
1044 if (ipv6_addr_any((struct in6_addr *)&x->props.saddr))
1045 memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
1046 break;
1047 }
3819a35f 1048
5c1b9ab3
FW		 1049 x->props.mode = tmpl->mode;
1050 x->props.reqid = tmpl->reqid;
1051 x->props.family = tmpl->encap_family;
1da177e4
LT		 1052}
1053
e952837f
FW		 1054struct xfrm_hash_state_ptrs {
1055 const struct hlist_head *bydst;
1056 const struct hlist_head *bysrc;
1057 const struct hlist_head *byspi;
1058 unsigned int hmask;
1059};
1060
1061static void xfrm_hash_ptrs_get(const struct net *net, struct xfrm_hash_state_ptrs *ptrs)
1062{
1063 unsigned int sequence;
1064
1065 do {
1066 sequence = read_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
1067
1068 ptrs->bydst = xfrm_state_deref_check(net->xfrm.state_bydst, net);
1069 ptrs->bysrc = xfrm_state_deref_check(net->xfrm.state_bysrc, net);
1070 ptrs->byspi = xfrm_state_deref_check(net->xfrm.state_byspi, net);
1071 ptrs->hmask = net->xfrm.state_hmask;
1072 } while (read_seqcount_retry(&net->xfrm.xfrm_state_hash_generation, sequence));
1073}
1074
1075static struct xfrm_state *__xfrm_state_lookup_all(const struct xfrm_hash_state_ptrs *state_ptrs,
1076 u32 mark,
f8a70afa
LR		 1077 const xfrm_address_t *daddr,
1078 __be32 spi, u8 proto,
1079 unsigned short family,
1080 struct xfrm_dev_offload *xdo)
1081{
e952837f 1082 unsigned int h = __xfrm_spi_hash(daddr, spi, proto, family, state_ptrs->hmask);
f8a70afa
LR		 1083 struct xfrm_state *x;
1084
e952837f 1085 hlist_for_each_entry_rcu(x, state_ptrs->byspi + h, byspi) {
f8a70afa
LR		 1086#ifdef CONFIG_XFRM_OFFLOAD
1087 if (xdo->type == XFRM_DEV_OFFLOAD_PACKET) {
1088 if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
1089 /* HW states are in the head of list, there is
1090 * no need to iterate further.
1091 */
1092 break;
1093
1094 /* Packet offload: both policy and SA should
1095 * have same device.
1096 */
1097 if (xdo->dev != x->xso.dev)
1098 continue;
1099 } else if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET)
1100 /* Skip HW policy for SW lookups */
1101 continue;
1102#endif
1103 if (x->props.family != family ||
1104 x->id.spi != spi ||
1105 x->id.proto != proto ||
1106 !xfrm_addr_equal(&x->id.daddr, daddr, family))
1107 continue;
1108
1109 if ((mark & x->mark.m) != x->mark.v)
1110 continue;
1111 if (!xfrm_state_hold_rcu(x))
1112 continue;
1113 return x;
1114 }
1115
1116 return NULL;
1117}
1118
e952837f
FW		 1119static struct xfrm_state *__xfrm_state_lookup(const struct xfrm_hash_state_ptrs *state_ptrs,
1120 u32 mark,
9aa60088
DM		 1121 const xfrm_address_t *daddr,
1122 __be32 spi, u8 proto,
1123 unsigned short family)
edcd5821 1124{
e952837f 1125 unsigned int h = __xfrm_spi_hash(daddr, spi, proto, family, state_ptrs->hmask);
edcd5821
DM		 1126 struct xfrm_state *x;
1127
e952837f 1128 hlist_for_each_entry_rcu(x, state_ptrs->byspi + h, byspi) {
edcd5821
DM		 1129 if (x->props.family != family ||
1130 x->id.spi != spi ||
1802571b 1131 x->id.proto != proto ||
70e94e66 1132 !xfrm_addr_equal(&x->id.daddr, daddr, family))
edcd5821
DM		 1133 continue;
1134
3d6acfa7
JHS		 1135 if ((mark & x->mark.m) != x->mark.v)
1136 continue;
02efdff7
FW		 1137 if (!xfrm_state_hold_rcu(x))
1138 continue;
edcd5821
DM		 1139 return x;
1140 }
1141
1142 return NULL;
1143}
1144
81a331a0
SK		 1145struct xfrm_state *xfrm_input_state_lookup(struct net *net, u32 mark,
1146 const xfrm_address_t *daddr,
1147 __be32 spi, u8 proto,
1148 unsigned short family)
1149{
e952837f 1150 struct xfrm_hash_state_ptrs state_ptrs;
81a331a0
SK		 1151 struct hlist_head *state_cache_input;
1152 struct xfrm_state *x = NULL;
81a331a0 1153
6c9b7db9 1154 state_cache_input = raw_cpu_ptr(net->xfrm.state_cache_input);
81a331a0
SK		 1155
1156 rcu_read_lock();
1157 hlist_for_each_entry_rcu(x, state_cache_input, state_cache_input) {
1158 if (x->props.family != family ||
1159 x->id.spi != spi ||
1160 x->id.proto != proto ||
1161 !xfrm_addr_equal(&x->id.daddr, daddr, family))
1162 continue;
1163
1164 if ((mark & x->mark.m) != x->mark.v)
1165 continue;
1166 if (!xfrm_state_hold_rcu(x))
1167 continue;
1168 goto out;
1169 }
1170
e952837f
FW		 1171 xfrm_hash_ptrs_get(net, &state_ptrs);
1172
1173 x = __xfrm_state_lookup(&state_ptrs, mark, daddr, spi, proto, family);
81a331a0
SK		 1174
1175 if (x && x->km.state == XFRM_STATE_VALID) {
1176 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1177 if (hlist_unhashed(&x->state_cache_input)) {
1178 hlist_add_head_rcu(&x->state_cache_input, state_cache_input);
1179 } else {
1180 hlist_del_rcu(&x->state_cache_input);
1181 hlist_add_head_rcu(&x->state_cache_input, state_cache_input);
1182 }
1183 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1184 }
1185
1186out:
1187 rcu_read_unlock();
81a331a0
SK		 1188 return x;
1189}
1190EXPORT_SYMBOL(xfrm_input_state_lookup);
1191
e952837f
FW		 1192static struct xfrm_state *__xfrm_state_lookup_byaddr(const struct xfrm_hash_state_ptrs *state_ptrs,
1193 u32 mark,
9aa60088
DM		 1194 const xfrm_address_t *daddr,
1195 const xfrm_address_t *saddr,
1196 u8 proto, unsigned short family)
edcd5821 1197{
e952837f 1198 unsigned int h = __xfrm_src_hash(daddr, saddr, family, state_ptrs->hmask);
edcd5821
DM		 1199 struct xfrm_state *x;
1200
e952837f 1201 hlist_for_each_entry_rcu(x, state_ptrs->bysrc + h, bysrc) {
edcd5821 1202 if (x->props.family != family ||
1802571b 1203 x->id.proto != proto ||
70e94e66
YH		 1204 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1205 !xfrm_addr_equal(&x->props.saddr, saddr, family))
edcd5821
DM		 1206 continue;
1207
3d6acfa7
JHS		 1208 if ((mark & x->mark.m) != x->mark.v)
1209 continue;
02efdff7
FW		 1210 if (!xfrm_state_hold_rcu(x))
1211 continue;
edcd5821
DM		 1212 return x;
1213 }
1214
1215 return NULL;
1216}
1217
1218static inline struct xfrm_state *
1219__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
1220{
e952837f 1221 struct xfrm_hash_state_ptrs state_ptrs;
221df1ed 1222 struct net *net = xs_net(x);
bd55775c 1223 u32 mark = x->mark.v & x->mark.m;
221df1ed 1224
e952837f
FW		 1225 xfrm_hash_ptrs_get(net, &state_ptrs);
1226
edcd5821 1227 if (use_spi)
e952837f 1228 return __xfrm_state_lookup(&state_ptrs, mark, &x->id.daddr,
bd55775c 1229 x->id.spi, x->id.proto, family);
edcd5821 1230 else
e952837f 1231 return __xfrm_state_lookup_byaddr(&state_ptrs, mark,
bd55775c 1232 &x->id.daddr,
edcd5821
DM		 1233 &x->props.saddr,
1234 x->id.proto, family);
1235}
1236
98806f75 1237static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
2fab22f2
PM		 1238{
1239 if (have_hash_collision &&
98806f75
AD		 1240 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
1241 net->xfrm.state_num > net->xfrm.state_hmask)
1242 schedule_work(&net->xfrm.state_hash_work);
2fab22f2
PM		 1243}
1244
08ec9af1 1245static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
4a08ab0f 1246 const struct flowi *fl, unsigned short family,
08ec9af1
DM		 1247 struct xfrm_state **best, int *acq_in_progress,
1248 int *error)
1249{
1ddf9916
SK		 1250 /* We need the cpu id just as a lookup key,
1251 * we don't require it to be stable.
1252 */
1253 unsigned int pcpu_id = get_cpu();
1254 put_cpu();
1255
08ec9af1
DM		 1256 /* Resolution logic:
1257 * 1. There is a valid state with matching selector. Done.
1258 * 2. Valid state with inappropriate selector. Skip.
1259 *
1260 * Entering area of "sysdeps".
1261 *
1262 * 3. If state is not valid, selector is temporary, it selects
1263 * only session which triggered previous resolution. Key
1264 * manager will do something to install a state with proper
1265 * selector.
1266 */
1267 if (x->km.state == XFRM_STATE_VALID) {
1268 if ((x->sel.family &&
e94ee171
HX		 1269 (x->sel.family != family ||
1270 !xfrm_selector_match(&x->sel, fl, family))) ||
3df98d79
PM		 1271 !security_xfrm_state_pol_flow_match(x, pol,
1272 &fl->u.__fl_common))
08ec9af1
DM		 1273 return;
1274
1ddf9916
SK		 1275 if (x->pcpu_num != UINT_MAX && x->pcpu_num != pcpu_id)
1276 return;
1277
08ec9af1 1278 if (!*best ||
1ddf9916 1279 ((*best)->pcpu_num == UINT_MAX && x->pcpu_num == pcpu_id) ||
08ec9af1
DM		 1280 (*best)->km.dying > x->km.dying ||
1281 ((*best)->km.dying == x->km.dying &&
1282 (*best)->curlft.add_time < x->curlft.add_time))
1283 *best = x;
1284 } else if (x->km.state == XFRM_STATE_ACQ) {
1ddf9916
SK		 1285 if (!*best || x->pcpu_num == pcpu_id)
1286 *acq_in_progress = 1;
08ec9af1
DM		 1287 } else if (x->km.state == XFRM_STATE_ERROR ||
1288 x->km.state == XFRM_STATE_EXPIRED) {
e94ee171
HX		 1289 if ((!x->sel.family ||
1290 (x->sel.family == family &&
1291 xfrm_selector_match(&x->sel, fl, family))) &&
3df98d79
PM		 1292 security_xfrm_state_pol_flow_match(x, pol,
1293 &fl->u.__fl_common))
08ec9af1
DM		 1294 *error = -ESRCH;
1295 }
1296}
1297
1da177e4 1298struct xfrm_state *
33765d06 1299xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
b520e9f6 1300 const struct flowi *fl, struct xfrm_tmpl *tmpl,
1da177e4 1301 struct xfrm_policy *pol, int *err,
bc56b334 1302 unsigned short family, u32 if_id)
1da177e4 1303{
08ec9af1 1304 static xfrm_address_t saddr_wildcard = { };
e952837f 1305 struct xfrm_hash_state_ptrs state_ptrs;
5447c5e4 1306 struct net *net = xp_net(pol);
6a783c90 1307 unsigned int h, h_wildcard;
37b08e34 1308 struct xfrm_state *x, *x0, *to_put;
1da177e4
LT		 1309 int acquire_in_progress = 0;
1310 int error = 0;
1311 struct xfrm_state *best = NULL;
bd55775c 1312 u32 mark = pol->mark.v & pol->mark.m;
8444cf71 1313 unsigned short encap_family = tmpl->encap_family;
b65e3d7b 1314 unsigned int sequence;
0f24558e 1315 struct km_event c;
1ddf9916 1316 unsigned int pcpu_id;
0045e3d8 1317 bool cached = false;
1ddf9916
SK		 1318
1319 /* We need the cpu id just as a lookup key,
1320 * we don't require it to be stable.
1321 */
1322 pcpu_id = get_cpu();
1323 put_cpu();
a716c119 1324
37b08e34
DM		 1325 to_put = NULL;
1326
e88add19 1327 sequence = read_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
b65e3d7b 1328
d737a580 1329 rcu_read_lock();
0045e3d8
SK		 1330 hlist_for_each_entry_rcu(x, &pol->state_cache_list, state_cache) {
1331 if (x->props.family == encap_family &&
1332 x->props.reqid == tmpl->reqid &&
1333 (mark & x->mark.m) == x->mark.v &&
1334 x->if_id == if_id &&
1335 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1336 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1337 tmpl->mode == x->props.mode &&
1338 tmpl->id.proto == x->id.proto &&
1339 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1340 xfrm_state_look_at(pol, x, fl, encap_family,
1341 &best, &acquire_in_progress, &error);
1342 }
1343
1344 if (best)
1345 goto cached;
1346
1347 hlist_for_each_entry_rcu(x, &pol->state_cache_list, state_cache) {
1348 if (x->props.family == encap_family &&
1349 x->props.reqid == tmpl->reqid &&
1350 (mark & x->mark.m) == x->mark.v &&
1351 x->if_id == if_id &&
1352 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1353 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
1354 tmpl->mode == x->props.mode &&
1355 tmpl->id.proto == x->id.proto &&
1356 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
1357 xfrm_state_look_at(pol, x, fl, family,
1358 &best, &acquire_in_progress, &error);
1359 }
1360
1361cached:
1362 cached = true;
1363 if (best)
1364 goto found;
1365 else if (error)
1366 best = NULL;
1367 else if (acquire_in_progress) /* XXX: acquire_in_progress should not happen */
1368 WARN_ON(1);
1369
e952837f
FW		 1370 xfrm_hash_ptrs_get(net, &state_ptrs);
1371
1372 h = __xfrm_dst_hash(daddr, saddr, tmpl->reqid, encap_family, state_ptrs.hmask);
1373 hlist_for_each_entry_rcu(x, state_ptrs.bydst + h, bydst) {
f8a70afa
LR		 1374#ifdef CONFIG_XFRM_OFFLOAD
1375 if (pol->xdo.type == XFRM_DEV_OFFLOAD_PACKET) {
1376 if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
1377 /* HW states are in the head of list, there is
1378 * no need to iterate further.
1379 */
1380 break;
1381
1382 /* Packet offload: both policy and SA should
1383 * have same device.
1384 */
1385 if (pol->xdo.dev != x->xso.dev)
1386 continue;
1387 } else if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET)
1388 /* Skip HW policy for SW lookups */
1389 continue;
1390#endif
8444cf71 1391 if (x->props.family == encap_family &&
1da177e4 1392 x->props.reqid == tmpl->reqid &&
3d6acfa7 1393 (mark & x->mark.m) == x->mark.v &&
7e652640 1394 x->if_id == if_id &&
fbd9a5b4 1395 !(x->props.flags & XFRM_STATE_WILDRECV) &&
8444cf71 1396 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
1da177e4
LT		 1397 tmpl->mode == x->props.mode &&
1398 tmpl->id.proto == x->id.proto &&
08ec9af1 1399 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
e94ee171 1400 xfrm_state_look_at(pol, x, fl, family,
08ec9af1
DM		 1401 &best, &acquire_in_progress, &error);
1402 }
6f115638 1403 if (best || acquire_in_progress)
08ec9af1
DM		 1404 goto found;
1405
e952837f
FW		 1406 h_wildcard = __xfrm_dst_hash(daddr, &saddr_wildcard, tmpl->reqid,
1407 encap_family, state_ptrs.hmask);
1408 hlist_for_each_entry_rcu(x, state_ptrs.bydst + h_wildcard, bydst) {
f8a70afa
LR		 1409#ifdef CONFIG_XFRM_OFFLOAD
1410 if (pol->xdo.type == XFRM_DEV_OFFLOAD_PACKET) {
1411 if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
1412 /* HW states are in the head of list, there is
1413 * no need to iterate further.
1414 */
1415 break;
1416
1417 /* Packet offload: both policy and SA should
1418 * have same device.
1419 */
1420 if (pol->xdo.dev != x->xso.dev)
1421 continue;
1422 } else if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET)
1423 /* Skip HW policy for SW lookups */
1424 continue;
1425#endif
8444cf71 1426 if (x->props.family == encap_family &&
08ec9af1 1427 x->props.reqid == tmpl->reqid &&
3d6acfa7 1428 (mark & x->mark.m) == x->mark.v &&
7e652640 1429 x->if_id == if_id &&
08ec9af1 1430 !(x->props.flags & XFRM_STATE_WILDRECV) &&
f59bbdfa 1431 xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
08ec9af1
DM		 1432 tmpl->mode == x->props.mode &&
1433 tmpl->id.proto == x->id.proto &&
1434 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
e94ee171 1435 xfrm_state_look_at(pol, x, fl, family,
08ec9af1 1436 &best, &acquire_in_progress, &error);
1da177e4
LT		 1437 }
1438
08ec9af1 1439found:
1ddf9916
SK		 1440 if (!(pol->flags & XFRM_POLICY_CPU_ACQUIRE) ||
1441 (best && (best->pcpu_num == pcpu_id)))
1442 x = best;
1443
1da177e4 1444 if (!x && !error && !acquire_in_progress) {
5c5d281a 1445 if (tmpl->id.spi &&
e952837f 1446 (x0 = __xfrm_state_lookup_all(&state_ptrs, mark, daddr,
f8a70afa
LR		 1447 tmpl->id.spi, tmpl->id.proto,
1448 encap_family,
1449 &pol->xdo)) != NULL) {
37b08e34 1450 to_put = x0;
1da177e4
LT		 1451 error = -EEXIST;
1452 goto out;
1453 }
0f24558e
HG		 1454
1455 c.net = net;
1456 /* If the KMs have no listeners (yet...), avoid allocating an SA
1457 * for each and every packet - garbage collection might not
1458 * handle the flood.
1459 */
1460 if (!km_is_alive(&c)) {
1461 error = -ESRCH;
1462 goto out;
1463 }
1464
5447c5e4 1465 x = xfrm_state_alloc(net);
1da177e4
LT		 1466 if (x == NULL) {
1467 error = -ENOMEM;
1468 goto out;
1469 }
8444cf71 1470 /* Initialize temporary state matching only
1da177e4 1471 * to current session. */
8444cf71 1472 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
bd55775c 1473 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
7e652640 1474 x->if_id = if_id;
1ddf9916
SK		 1475 if ((pol->flags & XFRM_POLICY_CPU_ACQUIRE) && best)
1476 x->pcpu_num = pcpu_id;
1da177e4 1477
1d28f42c 1478 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
e0d1caa7
VY		 1479 if (error) {
1480 x->km.state = XFRM_STATE_DEAD;
37b08e34 1481 to_put = x;
e0d1caa7
VY		 1482 x = NULL;
1483 goto out;
1484 }
f8a70afa
LR		 1485#ifdef CONFIG_XFRM_OFFLOAD
1486 if (pol->xdo.type == XFRM_DEV_OFFLOAD_PACKET) {
1487 struct xfrm_dev_offload *xdo = &pol->xdo;
1488 struct xfrm_dev_offload *xso = &x->xso;
1489
1490 xso->type = XFRM_DEV_OFFLOAD_PACKET;
1491 xso->dir = xdo->dir;
1492 xso->dev = xdo->dev;
1493 xso->real_dev = xdo->real_dev;
e0aeb9b9 1494 xso->flags = XFRM_DEV_OFFLOAD_FLAG_ACQ;
9199b915 1495 netdev_hold(xso->dev, &xso->dev_tracker, GFP_ATOMIC);
7681a4f5 1496 error = xso->dev->xfrmdev_ops->xdo_dev_state_add(x, NULL);
f8a70afa
LR		 1497 if (error) {
1498 xso->dir = 0;
1499 netdev_put(xso->dev, &xso->dev_tracker);
1500 xso->dev = NULL;
1501 xso->real_dev = NULL;
1502 xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
1503 x->km.state = XFRM_STATE_DEAD;
1504 to_put = x;
1505 x = NULL;
1506 goto out;
1507 }
1508 }
1509#endif
1da177e4 1510 if (km_query(x, tmpl, pol) == 0) {
d737a580 1511 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1512 x->km.state = XFRM_STATE_ACQ;
a4a87fa4 1513 x->dir = XFRM_SA_DIR_OUT;
5447c5e4 1514 list_add(&x->km.all, &net->xfrm.state_all);
a3567281 1515 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
3c611d40
LR		 1516 XFRM_STATE_INSERT(bydst, &x->bydst,
1517 net->xfrm.state_bydst + h,
1518 x->xso.type);
8444cf71 1519 h = xfrm_src_hash(net, daddr, saddr, encap_family);
3c611d40
LR		 1520 XFRM_STATE_INSERT(bysrc, &x->bysrc,
1521 net->xfrm.state_bysrc + h,
1522 x->xso.type);
0045e3d8 1523 INIT_HLIST_NODE(&x->state_cache);
1da177e4 1524 if (x->id.spi) {
8444cf71 1525 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
3c611d40
LR		 1526 XFRM_STATE_INSERT(byspi, &x->byspi,
1527 net->xfrm.state_byspi + h,
1528 x->xso.type);
1da177e4 1529 }
fe9f1d87
SD		 1530 if (x->km.seq) {
1531 h = xfrm_seq_hash(net, x->km.seq);
3c611d40
LR		 1532 XFRM_STATE_INSERT(byseq, &x->byseq,
1533 net->xfrm.state_byseq + h,
1534 x->xso.type);
fe9f1d87 1535 }
b27aeadb 1536 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
671422b2
TG		 1537 hrtimer_start(&x->mtimer,
1538 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1539 HRTIMER_MODE_REL_SOFT);
5447c5e4
AD		 1540 net->xfrm.state_num++;
1541 xfrm_hash_grow_check(net, x->bydst.next != NULL);
d737a580 1542 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1543 } else {
f8a70afa
LR		 1544#ifdef CONFIG_XFRM_OFFLOAD
1545 struct xfrm_dev_offload *xso = &x->xso;
1546
1547 if (xso->type == XFRM_DEV_OFFLOAD_PACKET) {
f3ec2b5d
LR		 1548 xfrm_dev_state_delete(x);
1549 xfrm_dev_state_free(x);
f8a70afa
LR		 1550 }
1551#endif
1da177e4 1552 x->km.state = XFRM_STATE_DEAD;
37b08e34 1553 to_put = x;
1da177e4
LT		 1554 x = NULL;
1555 error = -ESRCH;
1556 }
1ddf9916
SK		 1557
1558 /* Use the already installed 'fallback' while the CPU-specific
1559 * SA acquire is handled*/
1560 if (best)
1561 x = best;
1da177e4
LT		 1562 }
1563out:
02efdff7
FW		 1564 if (x) {
1565 if (!xfrm_state_hold_rcu(x)) {
1566 *err = -EAGAIN;
1567 x = NULL;
1568 }
1569 } else {
1da177e4 1570 *err = acquire_in_progress ? -EAGAIN : error;
02efdff7 1571 }
0045e3d8
SK		 1572
1573 if (x && x->km.state == XFRM_STATE_VALID && !cached &&
1574 (!(pol->flags & XFRM_POLICY_CPU_ACQUIRE) || x->pcpu_num == pcpu_id)) {
1575 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1576 if (hlist_unhashed(&x->state_cache))
1577 hlist_add_head_rcu(&x->state_cache, &pol->state_cache_list);
1578 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1579 }
1580
d737a580 1581 rcu_read_unlock();
37b08e34
DM		 1582 if (to_put)
1583 xfrm_state_put(to_put);
b65e3d7b 1584
e88add19 1585 if (read_seqcount_retry(&net->xfrm.xfrm_state_hash_generation, sequence)) {
b65e3d7b
FW		 1586 *err = -EAGAIN;
1587 if (x) {
1588 xfrm_state_put(x);
1589 x = NULL;
1590 }
1591 }
1592
1da177e4
LT		 1593 return x;
1594}
1595
628529b6 1596struct xfrm_state *
7e652640 1597xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
5447c5e4 1598 xfrm_address_t *daddr, xfrm_address_t *saddr,
628529b6
JHS		 1599 unsigned short family, u8 mode, u8 proto, u32 reqid)
1600{
4bda4f25 1601 unsigned int h;
628529b6 1602 struct xfrm_state *rx = NULL, *x = NULL;
628529b6 1603
4ae770bf 1604 spin_lock_bh(&net->xfrm.xfrm_state_lock);
5447c5e4 1605 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
b67bfe0d 1606 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
628529b6
JHS		 1607 if (x->props.family == family &&
1608 x->props.reqid == reqid &&
3d6acfa7 1609 (mark & x->mark.m) == x->mark.v &&
7e652640 1610 x->if_id == if_id &&
628529b6
JHS		 1611 !(x->props.flags & XFRM_STATE_WILDRECV) &&
1612 xfrm_state_addr_check(x, daddr, saddr, family) &&
1613 mode == x->props.mode &&
1614 proto == x->id.proto &&
1615 x->km.state == XFRM_STATE_VALID) {
1616 rx = x;
1617 break;
1618 }
1619 }
1620
1621 if (rx)
1622 xfrm_state_hold(rx);
4ae770bf 1623 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
628529b6
JHS		 1624
1625
1626 return rx;
1627}
1628EXPORT_SYMBOL(xfrm_stateonly_find);
1629
c454997e
FD		 1630struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1631 unsigned short family)
1632{
1633 struct xfrm_state *x;
1634 struct xfrm_state_walk *w;
1635
1636 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1637 list_for_each_entry(w, &net->xfrm.state_all, all) {
1638 x = container_of(w, struct xfrm_state, km);
1639 if (x->props.family != family ||
1640 x->id.spi != spi)
1641 continue;
1642
c454997e 1643 xfrm_state_hold(x);
bdddbf69 1644 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
c454997e
FD		 1645 return x;
1646 }
1647 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1648 return NULL;
1649}
1650EXPORT_SYMBOL(xfrm_state_lookup_byspi);
1651
1da177e4
LT		 1652static void __xfrm_state_insert(struct xfrm_state *x)
1653{
98806f75 1654 struct net *net = xs_net(x);
a624c108 1655 unsigned int h;
1da177e4 1656
98806f75 1657 list_add(&x->km.all, &net->xfrm.state_all);
4c563f76 1658
98806f75 1659 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
c1969f29 1660 x->props.reqid, x->props.family);
3c611d40
LR		 1661 XFRM_STATE_INSERT(bydst, &x->bydst, net->xfrm.state_bydst + h,
1662 x->xso.type);
1da177e4 1663
98806f75 1664 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
3c611d40
LR		 1665 XFRM_STATE_INSERT(bysrc, &x->bysrc, net->xfrm.state_bysrc + h,
1666 x->xso.type);
1da177e4 1667
7b4dc360 1668 if (x->id.spi) {
98806f75 1669 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
6c44e6b7
MN		 1670 x->props.family);
1671
3c611d40
LR		 1672 XFRM_STATE_INSERT(byspi, &x->byspi, net->xfrm.state_byspi + h,
1673 x->xso.type);
6c44e6b7
MN		 1674 }
1675
fe9f1d87
SD		 1676 if (x->km.seq) {
1677 h = xfrm_seq_hash(net, x->km.seq);
1678
3c611d40
LR		 1679 XFRM_STATE_INSERT(byseq, &x->byseq, net->xfrm.state_byseq + h,
1680 x->xso.type);
fe9f1d87
SD		 1681 }
1682
671422b2 1683 hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL_SOFT);
a47f0ce0
DM		 1684 if (x->replay_maxage)
1685 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
f8cd5488 1686
98806f75 1687 net->xfrm.state_num++;
f034b5d4 1688
98806f75 1689 xfrm_hash_grow_check(net, x->bydst.next != NULL);
f531d13b 1690 xfrm_nat_keepalive_state_updated(x);
1da177e4
LT		 1691}
1692
283bc9f3 1693/* net->xfrm.xfrm_state_lock is held */
c7f5ea3a
DM		 1694static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
1695{
98806f75 1696 struct net *net = xs_net(xnew);
c7f5ea3a
DM		 1697 unsigned short family = xnew->props.family;
1698 u32 reqid = xnew->props.reqid;
1699 struct xfrm_state *x;
c7f5ea3a 1700 unsigned int h;
3d6acfa7 1701 u32 mark = xnew->mark.v & xnew->mark.m;
7e652640 1702 u32 if_id = xnew->if_id;
1ddf9916 1703 u32 cpu_id = xnew->pcpu_num;
c7f5ea3a 1704
98806f75 1705 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
b67bfe0d 1706 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
c7f5ea3a
DM		 1707 if (x->props.family == family &&
1708 x->props.reqid == reqid &&
7e652640 1709 x->if_id == if_id &&
1ddf9916 1710 x->pcpu_num == cpu_id &&
3d6acfa7 1711 (mark & x->mark.m) == x->mark.v &&
70e94e66
YH		 1712 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
1713 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
34996cb9 1714 x->genid++;
c7f5ea3a
DM		 1715 }
1716}
1717
1da177e4
LT		 1718void xfrm_state_insert(struct xfrm_state *x)
1719{
283bc9f3
FD		 1720 struct net *net = xs_net(x);
1721
1722 spin_lock_bh(&net->xfrm.xfrm_state_lock);
c7f5ea3a 1723 __xfrm_state_bump_genids(x);
1da177e4 1724 __xfrm_state_insert(x);
283bc9f3 1725 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1726}
1727EXPORT_SYMBOL(xfrm_state_insert);
1728
283bc9f3 1729/* net->xfrm.xfrm_state_lock is held */
e473fcb4
MK		 1730static struct xfrm_state *__find_acq_core(struct net *net,
1731 const struct xfrm_mark *m,
a70486f0 1732 unsigned short family, u8 mode,
1ddf9916 1733 u32 reqid, u32 if_id, u32 pcpu_num, u8 proto,
a70486f0 1734 const xfrm_address_t *daddr,
e473fcb4
MK		 1735 const xfrm_address_t *saddr,
1736 int create)
2770834c 1737{
5447c5e4 1738 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
2770834c 1739 struct xfrm_state *x;
3d6acfa7 1740 u32 mark = m->v & m->m;
2770834c 1741
b67bfe0d 1742 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
2770834c
DM		 1743 if (x->props.reqid != reqid ||
1744 x->props.mode != mode ||
1745 x->props.family != family ||
1746 x->km.state != XFRM_STATE_ACQ ||
75e252d9 1747 x->id.spi != 0 ||
1802571b 1748 x->id.proto != proto ||
3d6acfa7 1749 (mark & x->mark.m) != x->mark.v ||
1ddf9916 1750 x->pcpu_num != pcpu_num ||
70e94e66
YH		 1751 !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
1752 !xfrm_addr_equal(&x->props.saddr, saddr, family))
2770834c
DM		 1753 continue;
1754
2770834c
DM		 1755 xfrm_state_hold(x);
1756 return x;
1757 }
1758
1759 if (!create)
1760 return NULL;
1761
5447c5e4 1762 x = xfrm_state_alloc(net);
2770834c
DM		 1763 if (likely(x)) {
1764 switch (family) {
1765 case AF_INET:
1766 x->sel.daddr.a4 = daddr->a4;
1767 x->sel.saddr.a4 = saddr->a4;
1768 x->sel.prefixlen_d = 32;
1769 x->sel.prefixlen_s = 32;
1770 x->props.saddr.a4 = saddr->a4;
1771 x->id.daddr.a4 = daddr->a4;
1772 break;
1773
1774 case AF_INET6:
15e318bd
JB		 1775 x->sel.daddr.in6 = daddr->in6;
1776 x->sel.saddr.in6 = saddr->in6;
2770834c
DM		 1777 x->sel.prefixlen_d = 128;
1778 x->sel.prefixlen_s = 128;
15e318bd
JB		 1779 x->props.saddr.in6 = saddr->in6;
1780 x->id.daddr.in6 = daddr->in6;
2770834c 1781 break;
3ff50b79 1782 }
2770834c 1783
1ddf9916 1784 x->pcpu_num = pcpu_num;
2770834c
DM		 1785 x->km.state = XFRM_STATE_ACQ;
1786 x->id.proto = proto;
1787 x->props.family = family;
1788 x->props.mode = mode;
1789 x->props.reqid = reqid;
7e652640 1790 x->if_id = if_id;
bd55775c
JHS		 1791 x->mark.v = m->v;
1792 x->mark.m = m->m;
b27aeadb 1793 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
2770834c 1794 xfrm_state_hold(x);
671422b2
TG		 1795 hrtimer_start(&x->mtimer,
1796 ktime_set(net->xfrm.sysctl_acq_expires, 0),
1797 HRTIMER_MODE_REL_SOFT);
5447c5e4 1798 list_add(&x->km.all, &net->xfrm.state_all);
3c611d40
LR		 1799 XFRM_STATE_INSERT(bydst, &x->bydst, net->xfrm.state_bydst + h,
1800 x->xso.type);
5447c5e4 1801 h = xfrm_src_hash(net, daddr, saddr, family);
3c611d40
LR		 1802 XFRM_STATE_INSERT(bysrc, &x->bysrc, net->xfrm.state_bysrc + h,
1803 x->xso.type);
918049f0 1804
5447c5e4 1805 net->xfrm.state_num++;
918049f0 1806
5447c5e4 1807 xfrm_hash_grow_check(net, x->bydst.next != NULL);
2770834c
DM		 1808 }
1809
1810 return x;
1811}
1812
1ddf9916 1813static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq, u32 pcpu_num);
1da177e4
LT		 1814
1815int xfrm_state_add(struct xfrm_state *x)
1816{
5447c5e4 1817 struct net *net = xs_net(x);
37b08e34 1818 struct xfrm_state *x1, *to_put;
1da177e4
LT		 1819 int family;
1820 int err;
bd55775c 1821 u32 mark = x->mark.v & x->mark.m;
eb2971b6 1822 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
1da177e4
LT		 1823
1824 family = x->props.family;
1da177e4 1825
37b08e34
DM		 1826 to_put = NULL;
1827
283bc9f3 1828 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 1829
edcd5821 1830 x1 = __xfrm_state_locate(x, use_spi, family);
1da177e4 1831 if (x1) {
37b08e34 1832 to_put = x1;
1da177e4
LT		 1833 x1 = NULL;
1834 err = -EEXIST;
1835 goto out;
1836 }
1837
eb2971b6 1838 if (use_spi && x->km.seq) {
1ddf9916 1839 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq, x->pcpu_num);
75e252d9 1840 if (x1 && ((x1->id.proto != x->id.proto) ||
70e94e66 1841 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
37b08e34 1842 to_put = x1;
1da177e4
LT		 1843 x1 = NULL;
1844 }
1845 }
1846
eb2971b6 1847 if (use_spi && !x1)
bd55775c 1848 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1ddf9916 1849 x->props.reqid, x->if_id, x->pcpu_num, x->id.proto,
2770834c 1850 &x->id.daddr, &x->props.saddr, 0);
1da177e4 1851
c7f5ea3a 1852 __xfrm_state_bump_genids(x);
1da177e4
LT		 1853 __xfrm_state_insert(x);
1854 err = 0;
1855
1856out:
283bc9f3 1857 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 1858
1859 if (x1) {
1860 xfrm_state_delete(x1);
1861 xfrm_state_put(x1);
1862 }
1863
37b08e34
DM		 1864 if (to_put)
1865 xfrm_state_put(to_put);
1866
1da177e4
LT		 1867 return err;
1868}
1869EXPORT_SYMBOL(xfrm_state_add);
1870
80c9abaa 1871#ifdef CONFIG_XFRM_MIGRATE
7aa05d30
AA		 1872static inline int clone_security(struct xfrm_state *x, struct xfrm_sec_ctx *security)
1873{
1874 struct xfrm_user_sec_ctx *uctx;
1875 int size = sizeof(*uctx) + security->ctx_len;
1876 int err;
1877
1878 uctx = kmalloc(size, GFP_KERNEL);
1879 if (!uctx)
1880 return -ENOMEM;
1881
1882 uctx->exttype = XFRMA_SEC_CTX;
1883 uctx->len = size;
1884 uctx->ctx_doi = security->ctx_doi;
1885 uctx->ctx_alg = security->ctx_alg;
1886 uctx->ctx_len = security->ctx_len;
1887 memcpy(uctx + 1, security->ctx_str, security->ctx_len);
1888 err = security_xfrm_state_alloc(x, uctx);
1889 kfree(uctx);
1890 if (err)
1891 return err;
1892
1893 return 0;
1894}
1895
4ab47d47
AA		 1896static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
1897 struct xfrm_encap_tmpl *encap)
80c9abaa 1898{
98806f75 1899 struct net *net = xs_net(orig);
98806f75 1900 struct xfrm_state *x = xfrm_state_alloc(net);
80c9abaa 1901 if (!x)
553f9118 1902 goto out;
80c9abaa
SS		 1903
1904 memcpy(&x->id, &orig->id, sizeof(x->id));
1905 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1906 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1907 x->props.mode = orig->props.mode;
1908 x->props.replay_window = orig->props.replay_window;
1909 x->props.reqid = orig->props.reqid;
1910 x->props.family = orig->props.family;
1911 x->props.saddr = orig->props.saddr;
1912
1913 if (orig->aalg) {
4447bb33 1914 x->aalg = xfrm_algo_auth_clone(orig->aalg);
80c9abaa
SS		 1915 if (!x->aalg)
1916 goto error;
1917 }
1918 x->props.aalgo = orig->props.aalgo;
1919
ee5c2317
SK		 1920 if (orig->aead) {
1921 x->aead = xfrm_algo_aead_clone(orig->aead);
75bf50f4 1922 x->geniv = orig->geniv;
ee5c2317
SK		 1923 if (!x->aead)
1924 goto error;
1925 }
80c9abaa
SS		 1926 if (orig->ealg) {
1927 x->ealg = xfrm_algo_clone(orig->ealg);
1928 if (!x->ealg)
1929 goto error;
1930 }
1931 x->props.ealgo = orig->props.ealgo;
1932
1933 if (orig->calg) {
1934 x->calg = xfrm_algo_clone(orig->calg);
1935 if (!x->calg)
1936 goto error;
1937 }
1938 x->props.calgo = orig->props.calgo;
1939
4ab47d47
AA		 1940 if (encap || orig->encap) {
1941 if (encap)
1942 x->encap = kmemdup(encap, sizeof(*x->encap),
1943 GFP_KERNEL);
1944 else
1945 x->encap = kmemdup(orig->encap, sizeof(*x->encap),
1946 GFP_KERNEL);
1947
80c9abaa
SS		 1948 if (!x->encap)
1949 goto error;
1950 }
1951
7aa05d30
AA		 1952 if (orig->security)
1953 if (clone_security(x, orig->security))
1954 goto error;
1955
80c9abaa
SS		 1956 if (orig->coaddr) {
1957 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1958 GFP_KERNEL);
1959 if (!x->coaddr)
1960 goto error;
1961 }
1962
af2f464e 1963 if (orig->replay_esn) {
cc9ab60e 1964 if (xfrm_replay_clone(x, orig))
af2f464e
SK		 1965 goto error;
1966 }
1967
bd55775c 1968 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
545e5c57 1969 memcpy(&x->props.smark, &orig->props.smark, sizeof(x->props.smark));
bd55775c 1970
80c9abaa 1971 x->props.flags = orig->props.flags;
a947b0a9 1972 x->props.extra_flags = orig->props.extra_flags;
80c9abaa 1973
1ddf9916 1974 x->pcpu_num = orig->pcpu_num;
7e652640 1975 x->if_id = orig->if_id;
ee5c2317
SK		 1976 x->tfcpad = orig->tfcpad;
1977 x->replay_maxdiff = orig->replay_maxdiff;
1978 x->replay_maxage = orig->replay_maxage;
8366685b 1979 memcpy(&x->curlft, &orig->curlft, sizeof(x->curlft));
80c9abaa
SS		 1980 x->km.state = orig->km.state;
1981 x->km.seq = orig->km.seq;
a486cd23
AA		 1982 x->replay = orig->replay;
1983 x->preplay = orig->preplay;
4e484b3e 1984 x->mapping_maxage = orig->mapping_maxage;
6aa811ac 1985 x->lastused = orig->lastused;
4e484b3e
AA		 1986 x->new_mapping = 0;
1987 x->new_mapping_sport = 0;
a4a87fa4 1988 x->dir = orig->dir;
80c9abaa
SS		 1989
1990 return x;
1991
1992 error:
553f9118
HX		 1993 xfrm_state_put(x);
1994out:
80c9abaa
SS		 1995 return NULL;
1996}
80c9abaa 1997
c1aca308
YY		 1998struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
1999 u32 if_id)
80c9abaa
SS		 2000{
2001 unsigned int h;
8c0cba22
SK		 2002 struct xfrm_state *x = NULL;
2003
2004 spin_lock_bh(&net->xfrm.xfrm_state_lock);
80c9abaa
SS		 2005
2006 if (m->reqid) {
283bc9f3 2007 h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 2008 m->reqid, m->old_family);
283bc9f3 2009 hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
80c9abaa
SS		 2010 if (x->props.mode != m->mode ||
2011 x->id.proto != m->proto)
2012 continue;
2013 if (m->reqid && x->props.reqid != m->reqid)
2014 continue;
c1aca308
YY		 2015 if (if_id != 0 && x->if_id != if_id)
2016 continue;
70e94e66
YH		 2017 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
2018 m->old_family) ||
2019 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
2020 m->old_family))
80c9abaa
SS		 2021 continue;
2022 xfrm_state_hold(x);
8c0cba22 2023 break;
80c9abaa
SS		 2024 }
2025 } else {
283bc9f3 2026 h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
80c9abaa 2027 m->old_family);
283bc9f3 2028 hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
80c9abaa
SS		 2029 if (x->props.mode != m->mode ||
2030 x->id.proto != m->proto)
2031 continue;
c1aca308
YY		 2032 if (if_id != 0 && x->if_id != if_id)
2033 continue;
70e94e66
YH		 2034 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
2035 m->old_family) ||
2036 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
2037 m->old_family))
80c9abaa
SS		 2038 continue;
2039 xfrm_state_hold(x);
8c0cba22 2040 break;
80c9abaa
SS		 2041 }
2042 }
2043
8c0cba22
SK		 2044 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2045
2046 return x;
80c9abaa
SS		 2047}
2048EXPORT_SYMBOL(xfrm_migrate_state_find);
2049
3e94c2dc 2050struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
4ab47d47
AA		 2051 struct xfrm_migrate *m,
2052 struct xfrm_encap_tmpl *encap)
80c9abaa
SS		 2053{
2054 struct xfrm_state *xc;
80c9abaa 2055
4ab47d47 2056 xc = xfrm_state_clone(x, encap);
80c9abaa
SS		 2057 if (!xc)
2058 return NULL;
2059
e03c3bba
YY		 2060 xc->props.family = m->new_family;
2061
2062 if (xfrm_init_state(xc) < 0)
2063 goto error;
2064
80c9abaa
SS		 2065 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
2066 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
2067
2068 /* add state */
70e94e66 2069 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
80c9abaa
SS		 2070 /* a care is needed when the destination address of the
2071 state is to be updated as it is a part of triplet */
2072 xfrm_state_insert(xc);
2073 } else {
cc9ab60e 2074 if (xfrm_state_add(xc) < 0)
80c9abaa
SS		 2075 goto error;
2076 }
2077
2078 return xc;
2079error:
78347c8c 2080 xfrm_state_put(xc);
80c9abaa
SS		 2081 return NULL;
2082}
2083EXPORT_SYMBOL(xfrm_state_migrate);
2084#endif
2085
1da177e4
LT		 2086int xfrm_state_update(struct xfrm_state *x)
2087{
37b08e34 2088 struct xfrm_state *x1, *to_put;
1da177e4 2089 int err;
eb2971b6 2090 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
283bc9f3 2091 struct net *net = xs_net(x);
1da177e4 2092
37b08e34
DM		 2093 to_put = NULL;
2094
283bc9f3 2095 spin_lock_bh(&net->xfrm.xfrm_state_lock);
edcd5821 2096 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
1da177e4
LT		 2097
2098 err = -ESRCH;
2099 if (!x1)
2100 goto out;
2101
2102 if (xfrm_state_kern(x1)) {
37b08e34 2103 to_put = x1;
1da177e4
LT		 2104 err = -EEXIST;
2105 goto out;
2106 }
2107
2108 if (x1->km.state == XFRM_STATE_ACQ) {
a4a87fa4
AA		 2109 if (x->dir && x1->dir != x->dir)
2110 goto out;
2111
1da177e4
LT		 2112 __xfrm_state_insert(x);
2113 x = NULL;
a4a87fa4
AA		 2114 } else {
2115 if (x1->dir != x->dir)
2116 goto out;
1da177e4
LT		 2117 }
2118 err = 0;
2119
2120out:
283bc9f3 2121 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4 2122
37b08e34
DM		 2123 if (to_put)
2124 xfrm_state_put(to_put);
2125
1da177e4
LT		 2126 if (err)
2127 return err;
2128
2129 if (!x) {
2130 xfrm_state_delete(x1);
2131 xfrm_state_put(x1);
2132 return 0;
2133 }
2134
2135 err = -EINVAL;
2136 spin_lock_bh(&x1->lock);
2137 if (likely(x1->km.state == XFRM_STATE_VALID)) {
257a4b01
HX		 2138 if (x->encap && x1->encap &&
2139 x->encap->encap_type == x1->encap->encap_type)
1da177e4 2140 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
257a4b01
HX		 2141 else if (x->encap || x1->encap)
2142 goto fail;
2143
060f02a3
NT		 2144 if (x->coaddr && x1->coaddr) {
2145 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
2146 }
2147 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
2148 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
1da177e4
LT		 2149 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
2150 x1->km.dying = 0;
2151
671422b2
TG		 2152 hrtimer_start(&x1->mtimer, ktime_set(1, 0),
2153 HRTIMER_MODE_REL_SOFT);
0a9e5794 2154 if (READ_ONCE(x1->curlft.use_time))
1da177e4
LT		 2155 xfrm_state_check_expire(x1);
2156
5baf4f9c 2157 if (x->props.smark.m || x->props.smark.v || x->if_id) {
6d8e85ff
NH		 2158 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2159
5baf4f9c
NH		 2160 if (x->props.smark.m || x->props.smark.v)
2161 x1->props.smark = x->props.smark;
2162
2163 if (x->if_id)
2164 x1->if_id = x->if_id;
6d8e85ff
NH		 2165
2166 __xfrm_state_bump_genids(x1);
2167 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2168 }
2169
1da177e4 2170 err = 0;
8fcbc637
TG		 2171 x->km.state = XFRM_STATE_DEAD;
2172 __xfrm_state_put(x);
1da177e4 2173 }
257a4b01
HX		 2174
2175fail:
1da177e4
LT		 2176 spin_unlock_bh(&x1->lock);
2177
2178 xfrm_state_put(x1);
2179
2180 return err;
2181}
2182EXPORT_SYMBOL(xfrm_state_update);
2183
2184int xfrm_state_check_expire(struct xfrm_state *x)
2185{
fd2bc419 2186 xfrm_dev_state_update_stats(x);
f3da86dc 2187
0a9e5794
ED		 2188 if (!READ_ONCE(x->curlft.use_time))
2189 WRITE_ONCE(x->curlft.use_time, ktime_get_real_seconds());
1da177e4 2190
1da177e4
LT		 2191 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
2192 x->curlft.packets >= x->lft.hard_packet_limit) {
4666faab 2193 x->km.state = XFRM_STATE_EXPIRED;
671422b2 2194 hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL_SOFT);
1da177e4
LT		 2195 return -EINVAL;
2196 }
2197
2198 if (!x->km.dying &&
2199 (x->curlft.bytes >= x->lft.soft_byte_limit ||
4666faab
HX		 2200 x->curlft.packets >= x->lft.soft_packet_limit)) {
2201 x->km.dying = 1;
53bc6b4d 2202 km_state_expired(x, 0, 0);
4666faab 2203 }
1da177e4
LT		 2204 return 0;
2205}
2206EXPORT_SYMBOL(xfrm_state_check_expire);
2207
f9f221c9
LR		 2208void xfrm_state_update_stats(struct net *net)
2209{
2210 struct xfrm_state *x;
2211 int i;
2212
2213 spin_lock_bh(&net->xfrm.xfrm_state_lock);
2214 for (i = 0; i <= net->xfrm.state_hmask; i++) {
2215 hlist_for_each_entry(x, net->xfrm.state_bydst + i, bydst)
2216 xfrm_dev_state_update_stats(x);
2217 }
2218 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2219}
2220
1da177e4 2221struct xfrm_state *
a70486f0 2222xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
bd55775c 2223 u8 proto, unsigned short family)
1da177e4 2224{
e952837f 2225 struct xfrm_hash_state_ptrs state_ptrs;
1da177e4 2226 struct xfrm_state *x;
1da177e4 2227
c2f672fc 2228 rcu_read_lock();
e952837f
FW		 2229 xfrm_hash_ptrs_get(net, &state_ptrs);
2230
2231 x = __xfrm_state_lookup(&state_ptrs, mark, daddr, spi, proto, family);
c2f672fc 2232 rcu_read_unlock();
1da177e4
LT		 2233 return x;
2234}
2235EXPORT_SYMBOL(xfrm_state_lookup);
2236
2237struct xfrm_state *
bd55775c 2238xfrm_state_lookup_byaddr(struct net *net, u32 mark,
a70486f0 2239 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
eb2971b6
MN		 2240 u8 proto, unsigned short family)
2241{
e952837f 2242 struct xfrm_hash_state_ptrs state_ptrs;
eb2971b6 2243 struct xfrm_state *x;
eb2971b6 2244
283bc9f3 2245 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e952837f
FW		 2246
2247 xfrm_hash_ptrs_get(net, &state_ptrs);
2248
2249 x = __xfrm_state_lookup_byaddr(&state_ptrs, mark, daddr, saddr, proto, family);
283bc9f3 2250 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
eb2971b6
MN		 2251 return x;
2252}
2253EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
2254
2255struct xfrm_state *
e473fcb4 2256xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
1ddf9916 2257 u32 if_id, u32 pcpu_num, u8 proto, const xfrm_address_t *daddr,
e473fcb4 2258 const xfrm_address_t *saddr, int create, unsigned short family)
1da177e4
LT		 2259{
2260 struct xfrm_state *x;
1da177e4 2261
283bc9f3 2262 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1ddf9916
SK		 2263 x = __find_acq_core(net, mark, family, mode, reqid, if_id, pcpu_num,
2264 proto, daddr, saddr, create);
283bc9f3 2265 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
2770834c 2266
1da177e4
LT		 2267 return x;
2268}
2269EXPORT_SYMBOL(xfrm_find_acq);
2270
41a49cc3 2271#ifdef CONFIG_XFRM_SUB_POLICY
3aaf3915
FW		 2272#if IS_ENABLED(CONFIG_IPV6)
2273/* distribution counting sort function for xfrm_state and xfrm_tmpl */
2274static void
2275__xfrm6_sort(void **dst, void **src, int n,
2276 int (*cmp)(const void *p), int maxclass)
2277{
2278 int count[XFRM_MAX_DEPTH] = { };
2279 int class[XFRM_MAX_DEPTH];
2280 int i;
2281
2282 for (i = 0; i < n; i++) {
2283 int c = cmp(src[i]);
2284
2285 class[i] = c;
2286 count[c]++;
2287 }
2288
2289 for (i = 2; i < maxclass; i++)
2290 count[i] += count[i - 1];
2291
2292 for (i = 0; i < n; i++) {
2293 dst[count[class[i] - 1]++] = src[i];
2294 src[i] = NULL;
2295 }
2296}
2297
2298/* Rule for xfrm_state:
2299 *
2300 * rule 1: select IPsec transport except AH
2301 * rule 2: select MIPv6 RO or inbound trigger
2302 * rule 3: select IPsec transport AH
2303 * rule 4: select IPsec tunnel
2304 * rule 5: others
2305 */
2306static int __xfrm6_state_sort_cmp(const void *p)
2307{
2308 const struct xfrm_state *v = p;
2309
2310 switch (v->props.mode) {
2311 case XFRM_MODE_TRANSPORT:
2312 if (v->id.proto != IPPROTO_AH)
2313 return 1;
2314 else
2315 return 3;
2316#if IS_ENABLED(CONFIG_IPV6_MIP6)
2317 case XFRM_MODE_ROUTEOPTIMIZATION:
2318 case XFRM_MODE_IN_TRIGGER:
2319 return 2;
2320#endif
2321 case XFRM_MODE_TUNNEL:
2322 case XFRM_MODE_BEET:
2323 return 4;
2324 }
2325 return 5;
2326}
2327
2328/* Rule for xfrm_tmpl:
2329 *
2330 * rule 1: select IPsec transport
2331 * rule 2: select MIPv6 RO or inbound trigger
2332 * rule 3: select IPsec tunnel
2333 * rule 4: others
2334 */
2335static int __xfrm6_tmpl_sort_cmp(const void *p)
2336{
2337 const struct xfrm_tmpl *v = p;
2338
2339 switch (v->mode) {
2340 case XFRM_MODE_TRANSPORT:
2341 return 1;
2342#if IS_ENABLED(CONFIG_IPV6_MIP6)
2343 case XFRM_MODE_ROUTEOPTIMIZATION:
2344 case XFRM_MODE_IN_TRIGGER:
2345 return 2;
2346#endif
2347 case XFRM_MODE_TUNNEL:
2348 case XFRM_MODE_BEET:
2349 return 3;
2350 }
2351 return 4;
2352}
2353#else
2354static inline int __xfrm6_state_sort_cmp(const void *p) { return 5; }
2355static inline int __xfrm6_tmpl_sort_cmp(const void *p) { return 4; }
2356
2357static inline void
2358__xfrm6_sort(void **dst, void **src, int n,
2359 int (*cmp)(const void *p), int maxclass)
2360{
2361 int i;
2362
2363 for (i = 0; i < n; i++)
2364 dst[i] = src[i];
2365}
2366#endif /* CONFIG_IPV6 */
2367
2368void
41a49cc3 2369xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
3aaf3915 2370 unsigned short family)
41a49cc3 2371{
3f5a95ad 2372 int i;
41a49cc3 2373
3aaf3915
FW		 2374 if (family == AF_INET6)
2375 __xfrm6_sort((void **)dst, (void **)src, n,
2376 __xfrm6_tmpl_sort_cmp, 5);
3f5a95ad
KD		 2377 else
2378 for (i = 0; i < n; i++)
2379 dst[i] = src[i];
41a49cc3 2380}
41a49cc3 2381
3aaf3915 2382void
41a49cc3
MN		 2383xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
2384 unsigned short family)
2385{
3f5a95ad 2386 int i;
283bc9f3 2387
3aaf3915
FW		 2388 if (family == AF_INET6)
2389 __xfrm6_sort((void **)dst, (void **)src, n,
2390 __xfrm6_state_sort_cmp, 6);
3f5a95ad
KD		 2391 else
2392 for (i = 0; i < n; i++)
2393 dst[i] = src[i];
41a49cc3 2394}
41a49cc3
MN		 2395#endif
2396
1da177e4
LT		 2397/* Silly enough, but I'm lazy to build resolution list */
2398
1ddf9916 2399static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq, u32 pcpu_num)
1da177e4 2400{
fe9f1d87
SD		 2401 unsigned int h = xfrm_seq_hash(net, seq);
2402 struct xfrm_state *x;
8f126e37 2403
fe9f1d87
SD		 2404 hlist_for_each_entry_rcu(x, net->xfrm.state_byseq + h, byseq) {
2405 if (x->km.seq == seq &&
2406 (mark & x->mark.m) == x->mark.v &&
1ddf9916 2407 x->pcpu_num == pcpu_num &&
fe9f1d87
SD		 2408 x->km.state == XFRM_STATE_ACQ) {
2409 xfrm_state_hold(x);
2410 return x;
1da177e4
LT		 2411 }
2412 }
fe9f1d87 2413
1da177e4
LT		 2414 return NULL;
2415}
2416
1ddf9916 2417struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq, u32 pcpu_num)
1da177e4
LT		 2418{
2419 struct xfrm_state *x;
2420
283bc9f3 2421 spin_lock_bh(&net->xfrm.xfrm_state_lock);
1ddf9916 2422 x = __xfrm_find_acq_byseq(net, mark, seq, pcpu_num);
283bc9f3 2423 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 2424 return x;
2425}
2426EXPORT_SYMBOL(xfrm_find_acq_byseq);
2427
2428u32 xfrm_get_acqseq(void)
2429{
2430 u32 res;
6836b9bd 2431 static atomic_t acqseq;
2432
2433 do {
2434 res = atomic_inc_return(&acqseq);
2435 } while (!res);
1da177e4 2436
1da177e4
LT		 2437 return res;
2438}
2439EXPORT_SYMBOL(xfrm_get_acqseq);
2440
c2dad11e 2441int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack)
776e9dd9
FD		 2442{
2443 switch (proto) {
2444 case IPPROTO_AH:
2445 case IPPROTO_ESP:
2446 break;
2447
2448 case IPPROTO_COMP:
2449 /* IPCOMP spi is 16-bits. */
c2dad11e
SD		 2450 if (max >= 0x10000) {
2451 NL_SET_ERR_MSG(extack, "IPCOMP SPI must be <= 65535");
776e9dd9 2452 return -EINVAL;
c2dad11e 2453 }
776e9dd9
FD		 2454 break;
2455
2456 default:
c2dad11e 2457 NL_SET_ERR_MSG(extack, "Invalid protocol, must be one of AH, ESP, IPCOMP");
776e9dd9
FD		 2458 return -EINVAL;
2459 }
2460
c2dad11e
SD		 2461 if (min > max) {
2462 NL_SET_ERR_MSG(extack, "Invalid SPI range: min > max");
776e9dd9 2463 return -EINVAL;
c2dad11e 2464 }
776e9dd9
FD		 2465
2466 return 0;
2467}
2468EXPORT_SYMBOL(verify_spi_info);
2469
c2dad11e
SD		 2470int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high,
2471 struct netlink_ext_ack *extack)
1da177e4 2472{
221df1ed 2473 struct net *net = xs_net(x);
f034b5d4 2474 unsigned int h;
1da177e4 2475 struct xfrm_state *x0;
658b219e
HX		 2476 int err = -ENOENT;
2477 __be32 minspi = htonl(low);
2478 __be32 maxspi = htonl(high);
a779d913 2479 __be32 newspi = 0;
bd55775c 2480 u32 mark = x->mark.v & x->mark.m;
1da177e4 2481
658b219e 2482 spin_lock_bh(&x->lock);
c2dad11e
SD		 2483 if (x->km.state == XFRM_STATE_DEAD) {
2484 NL_SET_ERR_MSG(extack, "Target ACQUIRE is in DEAD state");
658b219e 2485 goto unlock;
c2dad11e 2486 }
658b219e
HX		 2487
2488 err = 0;
1da177e4 2489 if (x->id.spi)
658b219e
HX		 2490 goto unlock;
2491
2492 err = -ENOENT;
1da177e4
LT		 2493
2494 if (minspi == maxspi) {
bd55775c 2495 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
1da177e4 2496 if (x0) {
c2dad11e 2497 NL_SET_ERR_MSG(extack, "Requested SPI is already in use");
1da177e4 2498 xfrm_state_put(x0);
658b219e 2499 goto unlock;
1da177e4 2500 }
a779d913 2501 newspi = minspi;
1da177e4
LT		 2502 } else {
2503 u32 spi = 0;
9b7a787d 2504 for (h = 0; h < high-low+1; h++) {
e8a533cb 2505 spi = get_random_u32_inclusive(low, high);
bd55775c 2506 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
1da177e4 2507 if (x0 == NULL) {
a779d913 2508 newspi = htonl(spi);
1da177e4
LT		 2509 break;
2510 }
2511 xfrm_state_put(x0);
2512 }
2513 }
a779d913 2514 if (newspi) {
283bc9f3 2515 spin_lock_bh(&net->xfrm.xfrm_state_lock);
a779d913 2516 x->id.spi = newspi;
12604d8a 2517 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
3c611d40
LR		 2518 XFRM_STATE_INSERT(byspi, &x->byspi, net->xfrm.state_byspi + h,
2519 x->xso.type);
283bc9f3 2520 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
658b219e
HX		 2521
2522 err = 0;
c2dad11e
SD		 2523 } else {
2524 NL_SET_ERR_MSG(extack, "No SPI available in the requested range");
1da177e4 2525 }
658b219e
HX		 2526
2527unlock:
2528 spin_unlock_bh(&x->lock);
2529
2530 return err;
1da177e4
LT		 2531}
2532EXPORT_SYMBOL(xfrm_alloc_spi);
2533
d3623099 2534static bool __xfrm_state_filter_match(struct xfrm_state *x,
870a2df4 2535 struct xfrm_address_filter *filter)
d3623099
ND		 2536{
2537 if (filter) {
2538 if ((filter->family == AF_INET ||
2539 filter->family == AF_INET6) &&
2540 x->props.family != filter->family)
2541 return false;
2542
2543 return addr_match(&x->props.saddr, &filter->saddr,
2544 filter->splen) &&
2545 addr_match(&x->id.daddr, &filter->daddr,
2546 filter->dplen);
2547 }
2548 return true;
2549}
2550
284fa7da 2551int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
4c563f76 2552 int (*func)(struct xfrm_state *, int, void*),
1da177e4
LT		 2553 void *data)
2554{
12a169e7
HX		 2555 struct xfrm_state *state;
2556 struct xfrm_state_walk *x;
1da177e4
LT		 2557 int err = 0;
2558
12a169e7 2559 if (walk->seq != 0 && list_empty(&walk->all))
4c563f76
TT		 2560 return 0;
2561
283bc9f3 2562 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 2563 if (list_empty(&walk->all))
284fa7da 2564 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
12a169e7 2565 else
80077702 2566 x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
284fa7da 2567 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
12a169e7 2568 if (x->state == XFRM_STATE_DEAD)
4c563f76 2569 continue;
12a169e7
HX		 2570 state = container_of(x, struct xfrm_state, km);
2571 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
4c563f76 2572 continue;
d3623099
ND		 2573 if (!__xfrm_state_filter_match(state, walk->filter))
2574 continue;
12a169e7
HX		 2575 err = func(state, walk->seq, data);
2576 if (err) {
2577 list_move_tail(&walk->all, &x->all);
2578 goto out;
1da177e4 2579 }
12a169e7 2580 walk->seq++;
1da177e4 2581 }
12a169e7 2582 if (walk->seq == 0) {
1da177e4
LT		 2583 err = -ENOENT;
2584 goto out;
2585 }
12a169e7 2586 list_del_init(&walk->all);
1da177e4 2587out:
283bc9f3 2588 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
1da177e4
LT		 2589 return err;
2590}
2591EXPORT_SYMBOL(xfrm_state_walk);
2592
d3623099 2593void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
870a2df4 2594 struct xfrm_address_filter *filter)
5c182458 2595{
12a169e7 2596 INIT_LIST_HEAD(&walk->all);
5c182458 2597 walk->proto = proto;
12a169e7
HX		 2598 walk->state = XFRM_STATE_DEAD;
2599 walk->seq = 0;
d3623099 2600 walk->filter = filter;
5c182458
HX		 2601}
2602EXPORT_SYMBOL(xfrm_state_walk_init);
2603
283bc9f3 2604void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
abb81c4f 2605{
d3623099
ND		 2606 kfree(walk->filter);
2607
12a169e7 2608 if (list_empty(&walk->all))
5c182458 2609 return;
5c182458 2610
283bc9f3 2611 spin_lock_bh(&net->xfrm.xfrm_state_lock);
12a169e7 2612 list_del(&walk->all);
283bc9f3 2613 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
abb81c4f
HX		 2614}
2615EXPORT_SYMBOL(xfrm_state_walk_done);
2616
e99e88a9 2617static void xfrm_replay_timer_handler(struct timer_list *t)
f8cd5488 2618{
e99e88a9 2619 struct xfrm_state *x = from_timer(x, t, rtimer);
f8cd5488
JHS		 2620
2621 spin_lock(&x->lock);
2622
2717096a 2623 if (x->km.state == XFRM_STATE_VALID) {
a6483b79 2624 if (xfrm_aevent_is_on(xs_net(x)))
cfc61c59 2625 xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
2717096a
JHS		 2626 else
2627 x->xflags |= XFRM_TIME_DEFER;
2628 }
f8cd5488
JHS		 2629
2630 spin_unlock(&x->lock);
2631}
2632
df01812e 2633static LIST_HEAD(xfrm_km_list);
1da177e4 2634
214e005b 2635void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4
LT		 2636{
2637 struct xfrm_mgr *km;
2638
85168c00
CW		 2639 rcu_read_lock();
2640 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 2641 if (km->notify_policy)
2642 km->notify_policy(xp, dir, c);
85168c00 2643 rcu_read_unlock();
26b15dad 2644}
1da177e4 2645
214e005b 2646void km_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2647{
2648 struct xfrm_mgr *km;
85168c00
CW		 2649 rcu_read_lock();
2650 list_for_each_entry_rcu(km, &xfrm_km_list, list)
26b15dad
JHS		 2651 if (km->notify)
2652 km->notify(x, c);
85168c00 2653 rcu_read_unlock();
26b15dad
JHS		 2654}
2655
2656EXPORT_SYMBOL(km_policy_notify);
2657EXPORT_SYMBOL(km_state_notify);
2658
15e47304 2659void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
26b15dad
JHS		 2660{
2661 struct km_event c;
2662
bf08867f 2663 c.data.hard = hard;
15e47304 2664 c.portid = portid;
f60f6b8f 2665 c.event = XFRM_MSG_EXPIRE;
26b15dad 2666 km_state_notify(x, &c);
1da177e4
LT		 2667}
2668
53bc6b4d 2669EXPORT_SYMBOL(km_state_expired);
26b15dad
JHS		 2670/*
2671 * We send to all registered managers regardless of failure
2672 * We are happy with one success
2673*/
980ebd25 2674int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
1da177e4 2675{
26b15dad 2676 int err = -EINVAL, acqret;
1da177e4
LT		 2677 struct xfrm_mgr *km;
2678
85168c00
CW		 2679 rcu_read_lock();
2680 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
65e0736b 2681 acqret = km->acquire(x, t, pol);
26b15dad
JHS		 2682 if (!acqret)
2683 err = acqret;
1da177e4 2684 }
85168c00 2685 rcu_read_unlock();
1da177e4
LT		 2686 return err;
2687}
980ebd25 2688EXPORT_SYMBOL(km_query);
1da177e4 2689
4e484b3e 2690static int __km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 2691{
2692 int err = -EINVAL;
2693 struct xfrm_mgr *km;
2694
85168c00
CW		 2695 rcu_read_lock();
2696 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
1da177e4
LT		 2697 if (km->new_mapping)
2698 err = km->new_mapping(x, ipaddr, sport);
2699 if (!err)
2700 break;
2701 }
85168c00 2702 rcu_read_unlock();
1da177e4
LT		 2703 return err;
2704}
4e484b3e
AA		 2705
2706int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
2707{
2708 int ret = 0;
2709
2710 if (x->mapping_maxage) {
2711 if ((jiffies / HZ - x->new_mapping) > x->mapping_maxage ||
2712 x->new_mapping_sport != sport) {
2713 x->new_mapping_sport = sport;
2714 x->new_mapping = jiffies / HZ;
2715 ret = __km_new_mapping(x, ipaddr, sport);
2716 }
2717 } else {
2718 ret = __km_new_mapping(x, ipaddr, sport);
2719 }
2720
2721 return ret;
2722}
1da177e4
LT		 2723EXPORT_SYMBOL(km_new_mapping);
2724
15e47304 2725void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
1da177e4 2726{
26b15dad 2727 struct km_event c;
1da177e4 2728
bf08867f 2729 c.data.hard = hard;
15e47304 2730 c.portid = portid;
f60f6b8f 2731 c.event = XFRM_MSG_POLEXPIRE;
26b15dad 2732 km_policy_notify(pol, dir, &c);
1da177e4 2733}
a70fcb0b 2734EXPORT_SYMBOL(km_policy_expired);
1da177e4 2735
2d60abc2 2736#ifdef CONFIG_XFRM_MIGRATE
183cad12
DM		 2737int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2738 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2739 const struct xfrm_kmaddress *k,
2740 const struct xfrm_encap_tmpl *encap)
80c9abaa
SS		 2741{
2742 int err = -EINVAL;
2743 int ret;
2744 struct xfrm_mgr *km;
2745
85168c00
CW		 2746 rcu_read_lock();
2747 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
80c9abaa 2748 if (km->migrate) {
8bafd730
AA		 2749 ret = km->migrate(sel, dir, type, m, num_migrate, k,
2750 encap);
80c9abaa
SS		 2751 if (!ret)
2752 err = ret;
2753 }
2754 }
85168c00 2755 rcu_read_unlock();
80c9abaa
SS		 2756 return err;
2757}
2758EXPORT_SYMBOL(km_migrate);
2d60abc2 2759#endif
80c9abaa 2760
db983c11 2761int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2762{
2763 int err = -EINVAL;
2764 int ret;
2765 struct xfrm_mgr *km;
2766
85168c00
CW		 2767 rcu_read_lock();
2768 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
97a64b45 2769 if (km->report) {
db983c11 2770 ret = km->report(net, proto, sel, addr);
97a64b45
MN		 2771 if (!ret)
2772 err = ret;
2773 }
2774 }
85168c00 2775 rcu_read_unlock();
97a64b45
MN		 2776 return err;
2777}
2778EXPORT_SYMBOL(km_report);
2779
bb9cd077 2780static bool km_is_alive(const struct km_event *c)
0f24558e
HG		 2781{
2782 struct xfrm_mgr *km;
2783 bool is_alive = false;
2784
2785 rcu_read_lock();
2786 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
2787 if (km->is_alive && km->is_alive(c)) {
2788 is_alive = true;
2789 break;
2790 }
2791 }
2792 rcu_read_unlock();
2793
2794 return is_alive;
2795}
0f24558e 2796
c9e7c76d
DS		 2797#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
2798static DEFINE_SPINLOCK(xfrm_translator_lock);
2799static struct xfrm_translator __rcu *xfrm_translator;
2800
2801struct xfrm_translator *xfrm_get_translator(void)
2802{
2803 struct xfrm_translator *xtr;
2804
2805 rcu_read_lock();
2806 xtr = rcu_dereference(xfrm_translator);
2807 if (unlikely(!xtr))
2808 goto out;
2809 if (!try_module_get(xtr->owner))
2810 xtr = NULL;
2811out:
2812 rcu_read_unlock();
2813 return xtr;
2814}
2815EXPORT_SYMBOL_GPL(xfrm_get_translator);
2816
2817void xfrm_put_translator(struct xfrm_translator *xtr)
2818{
2819 module_put(xtr->owner);
2820}
2821EXPORT_SYMBOL_GPL(xfrm_put_translator);
2822
2823int xfrm_register_translator(struct xfrm_translator *xtr)
2824{
2825 int err = 0;
2826
2827 spin_lock_bh(&xfrm_translator_lock);
2828 if (unlikely(xfrm_translator != NULL))
2829 err = -EEXIST;
2830 else
2831 rcu_assign_pointer(xfrm_translator, xtr);
2832 spin_unlock_bh(&xfrm_translator_lock);
2833
2834 return err;
2835}
2836EXPORT_SYMBOL_GPL(xfrm_register_translator);
2837
2838int xfrm_unregister_translator(struct xfrm_translator *xtr)
2839{
2840 int err = 0;
2841
2842 spin_lock_bh(&xfrm_translator_lock);
2843 if (likely(xfrm_translator != NULL)) {
2844 if (rcu_access_pointer(xfrm_translator) != xtr)
2845 err = -EINVAL;
2846 else
2847 RCU_INIT_POINTER(xfrm_translator, NULL);
2848 }
2849 spin_unlock_bh(&xfrm_translator_lock);
2850 synchronize_rcu();
2851
2852 return err;
2853}
2854EXPORT_SYMBOL_GPL(xfrm_unregister_translator);
2855#endif
2856
c6d1b26a 2857int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
1da177e4
LT		 2858{
2859 int err;
2860 u8 *data;
2861 struct xfrm_mgr *km;
2862 struct xfrm_policy *pol = NULL;
2863
c6d1b26a 2864 if (sockptr_is_null(optval) && !optlen) {
be8f8284
LC		 2865 xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
2866 xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
2867 __sk_dst_reset(sk);
2868 return 0;
2869 }
2870
1da177e4
LT		 2871 if (optlen <= 0 || optlen > PAGE_SIZE)
2872 return -EMSGSIZE;
2873
c6d1b26a 2874 data = memdup_sockptr(optval, optlen);
a133d930
GT		 2875 if (IS_ERR(data))
2876 return PTR_ERR(data);
1da177e4 2877
96392ee5
DS		 2878 if (in_compat_syscall()) {
2879 struct xfrm_translator *xtr = xfrm_get_translator();
2880
48f486e1
YK		 2881 if (!xtr) {
2882 kfree(data);
96392ee5 2883 return -EOPNOTSUPP;
48f486e1 2884 }
96392ee5
DS		 2885
2886 err = xtr->xlate_user_policy_sockptr(&data, optlen);
2887 xfrm_put_translator(xtr);
2888 if (err) {
2889 kfree(data);
2890 return err;
2891 }
2892 }
2893
1da177e4 2894 err = -EINVAL;
85168c00
CW		 2895 rcu_read_lock();
2896 list_for_each_entry_rcu(km, &xfrm_km_list, list) {
cb969f07 2897 pol = km->compile_policy(sk, optname, data,
1da177e4
LT		 2898 optlen, &err);
2899 if (err >= 0)
2900 break;
2901 }
85168c00 2902 rcu_read_unlock();
1da177e4
LT		 2903
2904 if (err >= 0) {
2905 xfrm_sk_policy_insert(sk, err, pol);
2906 xfrm_pol_put(pol);
2b06cdf3 2907 __sk_dst_reset(sk);
1da177e4
LT		 2908 err = 0;
2909 }
2910
1da177e4
LT		 2911 kfree(data);
2912 return err;
2913}
2914EXPORT_SYMBOL(xfrm_user_policy);
2915
85168c00
CW		 2916static DEFINE_SPINLOCK(xfrm_km_lock);
2917
f41b284a 2918void xfrm_register_km(struct xfrm_mgr *km)
1da177e4 2919{
85168c00
CW		 2920 spin_lock_bh(&xfrm_km_lock);
2921 list_add_tail_rcu(&km->list, &xfrm_km_list);
2922 spin_unlock_bh(&xfrm_km_lock);
1da177e4
LT		 2923}
2924EXPORT_SYMBOL(xfrm_register_km);
2925
f41b284a 2926void xfrm_unregister_km(struct xfrm_mgr *km)
1da177e4 2927{
85168c00
CW		 2928 spin_lock_bh(&xfrm_km_lock);
2929 list_del_rcu(&km->list);
2930 spin_unlock_bh(&xfrm_km_lock);
2931 synchronize_rcu();
1da177e4
LT		 2932}
2933EXPORT_SYMBOL(xfrm_unregister_km);
2934
2935int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
2936{
2937 int err = 0;
423826a7
FW		 2938
2939 if (WARN_ON(afinfo->family >= NPROTO))
1da177e4 2940 return -EAFNOSUPPORT;
423826a7 2941
44abdc30 2942 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4 2943 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
f31e8d4f 2944 err = -EEXIST;
edcd5821 2945 else
44abdc30
CW		 2946 rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
2947 spin_unlock_bh(&xfrm_state_afinfo_lock);
1da177e4
LT		 2948 return err;
2949}
2950EXPORT_SYMBOL(xfrm_state_register_afinfo);
2951
2952int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
2953{
423826a7
FW		 2954 int err = 0, family = afinfo->family;
2955
2956 if (WARN_ON(family >= NPROTO))
1da177e4 2957 return -EAFNOSUPPORT;
423826a7 2958
44abdc30 2959 spin_lock_bh(&xfrm_state_afinfo_lock);
1da177e4 2960 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
423826a7 2961 if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
1da177e4 2962 err = -EINVAL;
edcd5821 2963 else
44abdc30 2964 RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
1da177e4 2965 }
44abdc30
CW		 2966 spin_unlock_bh(&xfrm_state_afinfo_lock);
2967 synchronize_rcu();
1da177e4
LT		 2968 return err;
2969}
2970EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
2971
711059b9
FW		 2972struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
2973{
2974 if (unlikely(family >= NPROTO))
2975 return NULL;
2976
2977 return rcu_dereference(xfrm_state_afinfo[family]);
2978}
733a5fac 2979EXPORT_SYMBOL_GPL(xfrm_state_afinfo_get_rcu);
711059b9 2980
628e341f 2981struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
1da177e4
LT		 2982{
2983 struct xfrm_state_afinfo *afinfo;
2984 if (unlikely(family >= NPROTO))
2985 return NULL;
44abdc30
CW		 2986 rcu_read_lock();
2987 afinfo = rcu_dereference(xfrm_state_afinfo[family]);
546be240 2988 if (unlikely(!afinfo))
44abdc30 2989 rcu_read_unlock();
1da177e4
LT		 2990 return afinfo;
2991}
2992
b48c05ab
SK		 2993void xfrm_flush_gc(void)
2994{
2995 flush_work(&xfrm_state_gc_work);
2996}
2997EXPORT_SYMBOL(xfrm_flush_gc);
2998
1da177e4
LT		 2999/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
3000void xfrm_state_delete_tunnel(struct xfrm_state *x)
3001{
3002 if (x->tunnel) {
3003 struct xfrm_state *t = x->tunnel;
3004
3005 if (atomic_read(&t->tunnel_users) == 2)
3006 xfrm_state_delete(t);
3007 atomic_dec(&t->tunnel_users);
f75a2804 3008 xfrm_state_put_sync(t);
1da177e4
LT		 3009 x->tunnel = NULL;
3010 }
3011}
3012EXPORT_SYMBOL(xfrm_state_delete_tunnel);
3013
a6d95c5a 3014u32 xfrm_state_mtu(struct xfrm_state *x, int mtu)
1da177e4 3015{
b3b73b8e 3016 const struct xfrm_type *type = READ_ONCE(x->type);
c7b37c76
FW		 3017 struct crypto_aead *aead;
3018 u32 blksize, net_adj = 0;
3019
3020 if (x->km.state != XFRM_STATE_VALID ||
3021 !type || type->proto != IPPROTO_ESP)
3022 return mtu - x->props.header_len;
3023
3024 aead = x->data;
3025 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
1da177e4 3026
c7b37c76
FW		 3027 switch (x->props.mode) {
3028 case XFRM_MODE_TRANSPORT:
3029 case XFRM_MODE_BEET:
3030 if (x->props.family == AF_INET)
3031 net_adj = sizeof(struct iphdr);
3032 else if (x->props.family == AF_INET6)
3033 net_adj = sizeof(struct ipv6hdr);
3034 break;
3035 case XFRM_MODE_TUNNEL:
3036 break;
3037 default:
3038 WARN_ON_ONCE(1);
3039 break;
3040 }
b3b73b8e 3041
c7b37c76
FW		 3042 return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
3043 net_adj) & ~(blksize - 1)) + net_adj - 2;
1da177e4 3044}
a6d95c5a 3045EXPORT_SYMBOL_GPL(xfrm_state_mtu);
1da177e4 3046
741f9a10
SD		 3047int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload,
3048 struct netlink_ext_ack *extack)
72cb6962 3049{
c9500d7b
FW		 3050 const struct xfrm_mode *inner_mode;
3051 const struct xfrm_mode *outer_mode;
d094cd83 3052 int family = x->props.family;
72cb6962
HX		 3053 int err;
3054
e4681747 3055 if (family == AF_INET &&
0968d2a4 3056 READ_ONCE(xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc))
e4681747 3057 x->props.flags |= XFRM_STATE_NOPMTUDISC;
d094cd83
HX		 3058
3059 err = -EPROTONOSUPPORT;
13996378 3060
df9dcb45
KM		 3061 if (x->sel.family != AF_UNSPEC) {
3062 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
741f9a10
SD		 3063 if (inner_mode == NULL) {
3064 NL_SET_ERR_MSG(extack, "Requested mode not found");
df9dcb45 3065 goto error;
741f9a10 3066 }
df9dcb45
KM		 3067
3068 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
741f9a10
SD		 3069 family != x->sel.family) {
3070 NL_SET_ERR_MSG(extack, "Only tunnel modes can accommodate a change of family");
df9dcb45 3071 goto error;
741f9a10 3072 }
df9dcb45 3073
c9500d7b 3074 x->inner_mode = *inner_mode;
df9dcb45 3075 } else {
4c145dce 3076 const struct xfrm_mode *inner_mode_iaf;
d81d2285 3077 int iafamily = AF_INET;
df9dcb45 3078
d81d2285 3079 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
741f9a10
SD		 3080 if (inner_mode == NULL) {
3081 NL_SET_ERR_MSG(extack, "Requested mode not found");
df9dcb45 3082 goto error;
741f9a10 3083 }
df9dcb45 3084
c9500d7b 3085 x->inner_mode = *inner_mode;
df9dcb45 3086
d81d2285
MW		 3087 if (x->props.family == AF_INET)
3088 iafamily = AF_INET6;
df9dcb45 3089
d81d2285
MW		 3090 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
3091 if (inner_mode_iaf) {
3092 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
c9500d7b 3093 x->inner_mode_iaf = *inner_mode_iaf;
df9dcb45
KM		 3094 }
3095 }
13996378 3096
d094cd83 3097 x->type = xfrm_get_type(x->id.proto, family);
741f9a10
SD		 3098 if (x->type == NULL) {
3099 NL_SET_ERR_MSG(extack, "Requested type not found");
72cb6962 3100 goto error;
741f9a10 3101 }
72cb6962 3102
ffdb5211 3103 x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);
9d389d7f 3104
e1e10b44 3105 err = x->type->init_state(x, extack);
72cb6962
HX		 3106 if (err)
3107 goto error;
3108
c9500d7b
FW		 3109 outer_mode = xfrm_get_mode(x->props.mode, family);
3110 if (!outer_mode) {
741f9a10 3111 NL_SET_ERR_MSG(extack, "Requested mode not found");
599901c3 3112 err = -EPROTONOSUPPORT;
b59f45d0 3113 goto error;
599901c3 3114 }
b59f45d0 3115
c9500d7b 3116 x->outer_mode = *outer_mode;
a454f0cc 3117 if (init_replay) {
1cf9a3ae 3118 err = xfrm_init_replay(x, extack);
a454f0cc
WY		 3119 if (err)
3120 goto error;
3121 }
3122
f531d13b
EB		 3123 if (x->nat_keepalive_interval) {
3124 if (x->dir != XFRM_SA_DIR_OUT) {
3125 NL_SET_ERR_MSG(extack, "NAT keepalive is only supported for outbound SAs");
3126 err = -EINVAL;
3127 goto error;
3128 }
3129
3130 if (!x->encap || x->encap->encap_type != UDP_ENCAP_ESPINUDP) {
3131 NL_SET_ERR_MSG(extack,
3132 "NAT keepalive is only supported for UDP encapsulation");
3133 err = -EINVAL;
3134 goto error;
3135 }
3136 }
3137
72cb6962
HX		 3138error:
3139 return err;
3140}
3141
a454f0cc
WY		 3142EXPORT_SYMBOL(__xfrm_init_state);
3143
3144int xfrm_init_state(struct xfrm_state *x)
3145{
cc01572e
YK		 3146 int err;
3147
741f9a10 3148 err = __xfrm_init_state(x, true, false, NULL);
cc01572e
YK		 3149 if (!err)
3150 x->km.state = XFRM_STATE_VALID;
3151
3152 return err;
a454f0cc
WY		 3153}
3154
72cb6962 3155EXPORT_SYMBOL(xfrm_init_state);
a716c119 3156
d62ddc21 3157int __net_init xfrm_state_init(struct net *net)
1da177e4 3158{
f034b5d4
DM		 3159 unsigned int sz;
3160
565f0fa9
MK		 3161 if (net_eq(net, &init_net))
3162 xfrm_state_cache = KMEM_CACHE(xfrm_state,
3163 SLAB_HWCACHE_ALIGN | SLAB_PANIC);
3164
9d4139c7
AD		 3165 INIT_LIST_HEAD(&net->xfrm.state_all);
3166
f034b5d4
DM		 3167 sz = sizeof(struct hlist_head) * 8;
3168
73d189dc
AD		 3169 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
3170 if (!net->xfrm.state_bydst)
3171 goto out_bydst;
d320bbb3
AD		 3172 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
3173 if (!net->xfrm.state_bysrc)
3174 goto out_bysrc;
b754a4fd
AD		 3175 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
3176 if (!net->xfrm.state_byspi)
3177 goto out_byspi;
fe9f1d87
SD		 3178 net->xfrm.state_byseq = xfrm_hash_alloc(sz);
3179 if (!net->xfrm.state_byseq)
3180 goto out_byseq;
81a331a0
SK		 3181
3182 net->xfrm.state_cache_input = alloc_percpu(struct hlist_head);
3183 if (!net->xfrm.state_cache_input)
3184 goto out_state_cache_input;
3185
529983ec 3186 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
1da177e4 3187
0bf7c5b0 3188 net->xfrm.state_num = 0;
63082733 3189 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
283bc9f3 3190 spin_lock_init(&net->xfrm.xfrm_state_lock);
bc8e0adf
AD		 3191 seqcount_spinlock_init(&net->xfrm.xfrm_state_hash_generation,
3192 &net->xfrm.xfrm_state_lock);
d62ddc21 3193 return 0;
73d189dc 3194
81a331a0
SK		 3195out_state_cache_input:
3196 xfrm_hash_free(net->xfrm.state_byseq, sz);
fe9f1d87
SD		 3197out_byseq:
3198 xfrm_hash_free(net->xfrm.state_byspi, sz);
b754a4fd
AD		 3199out_byspi:
3200 xfrm_hash_free(net->xfrm.state_bysrc, sz);
d320bbb3
AD		 3201out_bysrc:
3202 xfrm_hash_free(net->xfrm.state_bydst, sz);
73d189dc
AD		 3203out_bydst:
3204 return -ENOMEM;
d62ddc21
AD		 3205}
3206
3207void xfrm_state_fini(struct net *net)
3208{
73d189dc
AD		 3209 unsigned int sz;
3210
7c2776ee 3211 flush_work(&net->xfrm.state_hash_work);
35db57bb 3212 flush_work(&xfrm_state_gc_work);
dbb2483b 3213 xfrm_state_flush(net, 0, false, true);
7c2776ee 3214
9d4139c7 3215 WARN_ON(!list_empty(&net->xfrm.state_all));
73d189dc 3216
529983ec 3217 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
fe9f1d87
SD		 3218 WARN_ON(!hlist_empty(net->xfrm.state_byseq));
3219 xfrm_hash_free(net->xfrm.state_byseq, sz);
b754a4fd
AD		 3220 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
3221 xfrm_hash_free(net->xfrm.state_byspi, sz);
d320bbb3
AD		 3222 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
3223 xfrm_hash_free(net->xfrm.state_bysrc, sz);
73d189dc
AD		 3224 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
3225 xfrm_hash_free(net->xfrm.state_bydst, sz);
81a331a0 3226 free_percpu(net->xfrm.state_cache_input);
1da177e4
LT		 3227}
3228
ab5f5e8b 3229#ifdef CONFIG_AUDITSYSCALL
cf35f43e
IJ		 3230static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
3231 struct audit_buffer *audit_buf)
ab5f5e8b 3232{
68277acc
PM		 3233 struct xfrm_sec_ctx *ctx = x->security;
3234 u32 spi = ntohl(x->id.spi);
3235
3236 if (ctx)
ab5f5e8b 3237 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
68277acc 3238 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
ab5f5e8b 3239
9b7a787d 3240 switch (x->props.family) {
ab5f5e8b 3241 case AF_INET:
21454aaa
HH		 3242 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
3243 &x->props.saddr.a4, &x->id.daddr.a4);
ab5f5e8b
JL		 3244 break;
3245 case AF_INET6:
5b095d98 3246 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
fdb46ee7 3247 x->props.saddr.a6, x->id.daddr.a6);
ab5f5e8b
JL		 3248 break;
3249 }
68277acc
PM		 3250
3251 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
ab5f5e8b
JL		 3252}
3253
cf35f43e
IJ		 3254static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
3255 struct audit_buffer *audit_buf)
afeb14b4 3256{
b71d1d42
ED		 3257 const struct iphdr *iph4;
3258 const struct ipv6hdr *iph6;
afeb14b4
PM		 3259
3260 switch (family) {
3261 case AF_INET:
3262 iph4 = ip_hdr(skb);
21454aaa
HH		 3263 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
3264 &iph4->saddr, &iph4->daddr);
afeb14b4
PM		 3265 break;
3266 case AF_INET6:
3267 iph6 = ipv6_hdr(skb);
3268 audit_log_format(audit_buf,
5b095d98 3269 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
9b7a787d 3270 &iph6->saddr, &iph6->daddr,
afeb14b4
PM		 3271 iph6->flow_lbl[0] & 0x0f,
3272 iph6->flow_lbl[1],
3273 iph6->flow_lbl[2]);
3274 break;
3275 }
3276}
3277
2e71029e 3278void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 3279{
3280 struct audit_buffer *audit_buf;
ab5f5e8b 3281
afeb14b4 3282 audit_buf = xfrm_audit_start("SAD-add");
ab5f5e8b
JL		 3283 if (audit_buf == NULL)
3284 return;
2e71029e 3285 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 3286 xfrm_audit_helper_sainfo(x, audit_buf);
3287 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 3288 audit_log_end(audit_buf);
3289}
3290EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
3291
2e71029e 3292void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
ab5f5e8b
JL		 3293{
3294 struct audit_buffer *audit_buf;
ab5f5e8b 3295
afeb14b4 3296 audit_buf = xfrm_audit_start("SAD-delete");
ab5f5e8b
JL		 3297 if (audit_buf == NULL)
3298 return;
2e71029e 3299 xfrm_audit_helper_usrinfo(task_valid, audit_buf);
afeb14b4
PM		 3300 xfrm_audit_helper_sainfo(x, audit_buf);
3301 audit_log_format(audit_buf, " res=%u", result);
ab5f5e8b
JL		 3302 audit_log_end(audit_buf);
3303}
3304EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
afeb14b4
PM		 3305
3306void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
3307 struct sk_buff *skb)
3308{
3309 struct audit_buffer *audit_buf;
3310 u32 spi;
3311
3312 audit_buf = xfrm_audit_start("SA-replay-overflow");
3313 if (audit_buf == NULL)
3314 return;
3315 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
3316 /* don't record the sequence number because it's inherent in this kind
3317 * of audit message */
3318 spi = ntohl(x->id.spi);
3319 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
3320 audit_log_end(audit_buf);
3321}
3322EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
3323
9fdc4883 3324void xfrm_audit_state_replay(struct xfrm_state *x,
afeb14b4
PM		 3325 struct sk_buff *skb, __be32 net_seq)
3326{
3327 struct audit_buffer *audit_buf;
3328 u32 spi;
3329
3330 audit_buf = xfrm_audit_start("SA-replayed-pkt");
3331 if (audit_buf == NULL)
3332 return;
3333 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
3334 spi = ntohl(x->id.spi);
3335 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
3336 spi, spi, ntohl(net_seq));
3337 audit_log_end(audit_buf);
3338}
9fdc4883 3339EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
afeb14b4
PM		 3340
3341void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
3342{
3343 struct audit_buffer *audit_buf;
3344
3345 audit_buf = xfrm_audit_start("SA-notfound");
3346 if (audit_buf == NULL)
3347 return;
3348 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
3349 audit_log_end(audit_buf);
3350}
3351EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
3352
3353void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
3354 __be32 net_spi, __be32 net_seq)
3355{
3356 struct audit_buffer *audit_buf;
3357 u32 spi;
3358
3359 audit_buf = xfrm_audit_start("SA-notfound");
3360 if (audit_buf == NULL)
3361 return;
3362 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
3363 spi = ntohl(net_spi);
3364 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
3365 spi, spi, ntohl(net_seq));
3366 audit_log_end(audit_buf);
3367}
3368EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
3369
3370void xfrm_audit_state_icvfail(struct xfrm_state *x,
3371 struct sk_buff *skb, u8 proto)
3372{
3373 struct audit_buffer *audit_buf;
3374 __be32 net_spi;
3375 __be32 net_seq;
3376
3377 audit_buf = xfrm_audit_start("SA-icv-failure");
3378 if (audit_buf == NULL)
3379 return;
3380 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
3381 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
3382 u32 spi = ntohl(net_spi);
3383 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
3384 spi, spi, ntohl(net_seq));
3385 }
3386 audit_log_end(audit_buf);
3387}
3388EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
ab5f5e8b 3389#endif /* CONFIG_AUDITSYSCALL */
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