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net/netfilter/nf_conntrack_core: Fix net_conntrack_lock()
[linux/fpc-iii.git] / net / xfrm / xfrm_user.c
blob2be4c6af008a7917ae5cc1e3306c5466cae387e4
1 /* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
10 *
11 */
12
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
26 #include <net/sock.h>
27 #include <net/xfrm.h>
28 #include <net/netlink.h>
29 #include <net/ah.h>
30 #include <linux/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
33 #endif
34 #include <asm/unaligned.h>
35
36 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
37 {
38 struct nlattr *rt = attrs[type];
39 struct xfrm_algo *algp;
40
41 if (!rt)
42 return 0;
43
44 algp = nla_data(rt);
45 if (nla_len(rt) < xfrm_alg_len(algp))
46 return -EINVAL;
47
48 switch (type) {
49 case XFRMA_ALG_AUTH:
50 case XFRMA_ALG_CRYPT:
51 case XFRMA_ALG_COMP:
52 break;
53
54 default:
55 return -EINVAL;
56 }
57
58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
59 return 0;
60 }
61
62 static int verify_auth_trunc(struct nlattr **attrs)
63 {
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
66
67 if (!rt)
68 return 0;
69
70 algp = nla_data(rt);
71 if (nla_len(rt) < xfrm_alg_auth_len(algp))
72 return -EINVAL;
73
74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
75 return 0;
76 }
77
78 static int verify_aead(struct nlattr **attrs)
79 {
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
82
83 if (!rt)
84 return 0;
85
86 algp = nla_data(rt);
87 if (nla_len(rt) < aead_len(algp))
88 return -EINVAL;
89
90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
91 return 0;
92 }
93
94 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
96 {
97 struct nlattr *rt = attrs[type];
98
99 if (rt && addrp)
100 *addrp = nla_data(rt);
101 }
102
103 static inline int verify_sec_ctx_len(struct nlattr **attrs)
104 {
105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
106 struct xfrm_user_sec_ctx *uctx;
107
108 if (!rt)
109 return 0;
110
111 uctx = nla_data(rt);
112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
113 return -EINVAL;
114
115 return 0;
116 }
117
118 static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
120 {
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
122 struct xfrm_replay_state_esn *rs;
123
124 if (p->flags & XFRM_STATE_ESN) {
125 if (!rt)
126 return -EINVAL;
127
128 rs = nla_data(rt);
129
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
131 return -EINVAL;
132
133 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
135 return -EINVAL;
136 }
137
138 if (!rt)
139 return 0;
140
141 /* As only ESP and AH support ESN feature. */
142 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
143 return -EINVAL;
144
145 if (p->replay_window != 0)
146 return -EINVAL;
147
148 return 0;
149 }
150
151 static int verify_newsa_info(struct xfrm_usersa_info *p,
152 struct nlattr **attrs)
153 {
154 int err;
155
156 err = -EINVAL;
157 switch (p->family) {
158 case AF_INET:
159 break;
160
161 case AF_INET6:
162 #if IS_ENABLED(CONFIG_IPV6)
163 break;
164 #else
165 err = -EAFNOSUPPORT;
166 goto out;
167 #endif
168
169 default:
170 goto out;
171 }
172
173 err = -EINVAL;
174 switch (p->id.proto) {
175 case IPPROTO_AH:
176 if ((!attrs[XFRMA_ALG_AUTH] &&
177 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
178 attrs[XFRMA_ALG_AEAD] ||
179 attrs[XFRMA_ALG_CRYPT] ||
180 attrs[XFRMA_ALG_COMP] ||
181 attrs[XFRMA_TFCPAD])
182 goto out;
183 break;
184
185 case IPPROTO_ESP:
186 if (attrs[XFRMA_ALG_COMP])
187 goto out;
188 if (!attrs[XFRMA_ALG_AUTH] &&
189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
192 goto out;
193 if ((attrs[XFRMA_ALG_AUTH] ||
194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
197 goto out;
198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
200 goto out;
201 break;
202
203 case IPPROTO_COMP:
204 if (!attrs[XFRMA_ALG_COMP] ||
205 attrs[XFRMA_ALG_AEAD] ||
206 attrs[XFRMA_ALG_AUTH] ||
207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
208 attrs[XFRMA_ALG_CRYPT] ||
209 attrs[XFRMA_TFCPAD] ||
210 (ntohl(p->id.spi) >= 0x10000))
211 goto out;
212 break;
213
214 #if IS_ENABLED(CONFIG_IPV6)
215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
220 attrs[XFRMA_ALG_AEAD] ||
221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
224 attrs[XFRMA_TFCPAD] ||
225 !attrs[XFRMA_COADDR])
226 goto out;
227 break;
228 #endif
229
230 default:
231 goto out;
232 }
233
234 if ((err = verify_aead(attrs)))
235 goto out;
236 if ((err = verify_auth_trunc(attrs)))
237 goto out;
238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
239 goto out;
240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
241 goto out;
242 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
243 goto out;
244 if ((err = verify_sec_ctx_len(attrs)))
245 goto out;
246 if ((err = verify_replay(p, attrs)))
247 goto out;
248
249 err = -EINVAL;
250 switch (p->mode) {
251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
253 case XFRM_MODE_ROUTEOPTIMIZATION:
254 case XFRM_MODE_BEET:
255 break;
256
257 default:
258 goto out;
259 }
260
261 err = 0;
262
263 out:
264 return err;
265 }
266
267 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
269 struct nlattr *rta)
270 {
271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
273
274 if (!rta)
275 return 0;
276
277 ualg = nla_data(rta);
278
279 algo = get_byname(ualg->alg_name, 1);
280 if (!algo)
281 return -ENOSYS;
282 *props = algo->desc.sadb_alg_id;
283
284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
285 if (!p)
286 return -ENOMEM;
287
288 strcpy(p->alg_name, algo->name);
289 *algpp = p;
290 return 0;
291 }
292
293 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
294 {
295 struct xfrm_algo *p, *ualg;
296 struct xfrm_algo_desc *algo;
297
298 if (!rta)
299 return 0;
300
301 ualg = nla_data(rta);
302
303 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
304 if (!algo)
305 return -ENOSYS;
306 x->props.ealgo = algo->desc.sadb_alg_id;
307
308 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
309 if (!p)
310 return -ENOMEM;
311
312 strcpy(p->alg_name, algo->name);
313 x->ealg = p;
314 x->geniv = algo->uinfo.encr.geniv;
315 return 0;
316 }
317
318 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
319 struct nlattr *rta)
320 {
321 struct xfrm_algo *ualg;
322 struct xfrm_algo_auth *p;
323 struct xfrm_algo_desc *algo;
324
325 if (!rta)
326 return 0;
327
328 ualg = nla_data(rta);
329
330 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
331 if (!algo)
332 return -ENOSYS;
333 *props = algo->desc.sadb_alg_id;
334
335 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
336 if (!p)
337 return -ENOMEM;
338
339 strcpy(p->alg_name, algo->name);
340 p->alg_key_len = ualg->alg_key_len;
341 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
342 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
343
344 *algpp = p;
345 return 0;
346 }
347
348 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
349 struct nlattr *rta)
350 {
351 struct xfrm_algo_auth *p, *ualg;
352 struct xfrm_algo_desc *algo;
353
354 if (!rta)
355 return 0;
356
357 ualg = nla_data(rta);
358
359 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
360 if (!algo)
361 return -ENOSYS;
362 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
363 return -EINVAL;
364 *props = algo->desc.sadb_alg_id;
365
366 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
367 if (!p)
368 return -ENOMEM;
369
370 strcpy(p->alg_name, algo->name);
371 if (!p->alg_trunc_len)
372 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
373
374 *algpp = p;
375 return 0;
376 }
377
378 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
379 {
380 struct xfrm_algo_aead *p, *ualg;
381 struct xfrm_algo_desc *algo;
382
383 if (!rta)
384 return 0;
385
386 ualg = nla_data(rta);
387
388 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
389 if (!algo)
390 return -ENOSYS;
391 x->props.ealgo = algo->desc.sadb_alg_id;
392
393 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
394 if (!p)
395 return -ENOMEM;
396
397 strcpy(p->alg_name, algo->name);
398 x->aead = p;
399 x->geniv = algo->uinfo.aead.geniv;
400 return 0;
401 }
402
403 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
404 struct nlattr *rp)
405 {
406 struct xfrm_replay_state_esn *up;
407 int ulen;
408
409 if (!replay_esn || !rp)
410 return 0;
411
412 up = nla_data(rp);
413 ulen = xfrm_replay_state_esn_len(up);
414
415 /* Check the overall length and the internal bitmap length to avoid
416 * potential overflow. */
417 if (nla_len(rp) < ulen ||
418 xfrm_replay_state_esn_len(replay_esn) != ulen ||
419 replay_esn->bmp_len != up->bmp_len)
420 return -EINVAL;
421
422 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
423 return -EINVAL;
424
425 return 0;
426 }
427
428 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
429 struct xfrm_replay_state_esn **preplay_esn,
430 struct nlattr *rta)
431 {
432 struct xfrm_replay_state_esn *p, *pp, *up;
433 int klen, ulen;
434
435 if (!rta)
436 return 0;
437
438 up = nla_data(rta);
439 klen = xfrm_replay_state_esn_len(up);
440 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
441
442 p = kzalloc(klen, GFP_KERNEL);
443 if (!p)
444 return -ENOMEM;
445
446 pp = kzalloc(klen, GFP_KERNEL);
447 if (!pp) {
448 kfree(p);
449 return -ENOMEM;
450 }
451
452 memcpy(p, up, ulen);
453 memcpy(pp, up, ulen);
454
455 *replay_esn = p;
456 *preplay_esn = pp;
457
458 return 0;
459 }
460
461 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
462 {
463 int len = 0;
464
465 if (xfrm_ctx) {
466 len += sizeof(struct xfrm_user_sec_ctx);
467 len += xfrm_ctx->ctx_len;
468 }
469 return len;
470 }
471
472 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
473 {
474 memcpy(&x->id, &p->id, sizeof(x->id));
475 memcpy(&x->sel, &p->sel, sizeof(x->sel));
476 memcpy(&x->lft, &p->lft, sizeof(x->lft));
477 x->props.mode = p->mode;
478 x->props.replay_window = min_t(unsigned int, p->replay_window,
479 sizeof(x->replay.bitmap) * 8);
480 x->props.reqid = p->reqid;
481 x->props.family = p->family;
482 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
483 x->props.flags = p->flags;
484
485 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
486 x->sel.family = p->family;
487 }
488
489 /*
490 * someday when pfkey also has support, we could have the code
491 * somehow made shareable and move it to xfrm_state.c - JHS
492 *
493 */
494 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
495 int update_esn)
496 {
497 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
498 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
499 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
500 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
501 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
502
503 if (re) {
504 struct xfrm_replay_state_esn *replay_esn;
505 replay_esn = nla_data(re);
506 memcpy(x->replay_esn, replay_esn,
507 xfrm_replay_state_esn_len(replay_esn));
508 memcpy(x->preplay_esn, replay_esn,
509 xfrm_replay_state_esn_len(replay_esn));
510 }
511
512 if (rp) {
513 struct xfrm_replay_state *replay;
514 replay = nla_data(rp);
515 memcpy(&x->replay, replay, sizeof(*replay));
516 memcpy(&x->preplay, replay, sizeof(*replay));
517 }
518
519 if (lt) {
520 struct xfrm_lifetime_cur *ltime;
521 ltime = nla_data(lt);
522 x->curlft.bytes = ltime->bytes;
523 x->curlft.packets = ltime->packets;
524 x->curlft.add_time = ltime->add_time;
525 x->curlft.use_time = ltime->use_time;
526 }
527
528 if (et)
529 x->replay_maxage = nla_get_u32(et);
530
531 if (rt)
532 x->replay_maxdiff = nla_get_u32(rt);
533 }
534
535 static struct xfrm_state *xfrm_state_construct(struct net *net,
536 struct xfrm_usersa_info *p,
537 struct nlattr **attrs,
538 int *errp)
539 {
540 struct xfrm_state *x = xfrm_state_alloc(net);
541 int err = -ENOMEM;
542
543 if (!x)
544 goto error_no_put;
545
546 copy_from_user_state(x, p);
547
548 if (attrs[XFRMA_SA_EXTRA_FLAGS])
549 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
550
551 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
552 goto error;
553 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
554 attrs[XFRMA_ALG_AUTH_TRUNC])))
555 goto error;
556 if (!x->props.aalgo) {
557 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
558 attrs[XFRMA_ALG_AUTH])))
559 goto error;
560 }
561 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
562 goto error;
563 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
564 xfrm_calg_get_byname,
565 attrs[XFRMA_ALG_COMP])))
566 goto error;
567
568 if (attrs[XFRMA_ENCAP]) {
569 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
570 sizeof(*x->encap), GFP_KERNEL);
571 if (x->encap == NULL)
572 goto error;
573 }
574
575 if (attrs[XFRMA_TFCPAD])
576 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
577
578 if (attrs[XFRMA_COADDR]) {
579 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
580 sizeof(*x->coaddr), GFP_KERNEL);
581 if (x->coaddr == NULL)
582 goto error;
583 }
584
585 xfrm_mark_get(attrs, &x->mark);
586
587 err = __xfrm_init_state(x, false);
588 if (err)
589 goto error;
590
591 if (attrs[XFRMA_SEC_CTX]) {
592 err = security_xfrm_state_alloc(x,
593 nla_data(attrs[XFRMA_SEC_CTX]));
594 if (err)
595 goto error;
596 }
597
598 if (attrs[XFRMA_OFFLOAD_DEV]) {
599 err = xfrm_dev_state_add(net, x,
600 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
601 if (err)
602 goto error;
603 }
604
605 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
606 attrs[XFRMA_REPLAY_ESN_VAL])))
607 goto error;
608
609 x->km.seq = p->seq;
610 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
611 /* sysctl_xfrm_aevent_etime is in 100ms units */
612 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
613
614 if ((err = xfrm_init_replay(x)))
615 goto error;
616
617 /* override default values from above */
618 xfrm_update_ae_params(x, attrs, 0);
619
620 return x;
621
622 error:
623 x->km.state = XFRM_STATE_DEAD;
624 xfrm_state_put(x);
625 error_no_put:
626 *errp = err;
627 return NULL;
628 }
629
630 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
631 struct nlattr **attrs)
632 {
633 struct net *net = sock_net(skb->sk);
634 struct xfrm_usersa_info *p = nlmsg_data(nlh);
635 struct xfrm_state *x;
636 int err;
637 struct km_event c;
638
639 err = verify_newsa_info(p, attrs);
640 if (err)
641 return err;
642
643 x = xfrm_state_construct(net, p, attrs, &err);
644 if (!x)
645 return err;
646
647 xfrm_state_hold(x);
648 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
649 err = xfrm_state_add(x);
650 else
651 err = xfrm_state_update(x);
652
653 xfrm_audit_state_add(x, err ? 0 : 1, true);
654
655 if (err < 0) {
656 x->km.state = XFRM_STATE_DEAD;
657 __xfrm_state_put(x);
658 goto out;
659 }
660
661 c.seq = nlh->nlmsg_seq;
662 c.portid = nlh->nlmsg_pid;
663 c.event = nlh->nlmsg_type;
664
665 km_state_notify(x, &c);
666 out:
667 xfrm_state_put(x);
668 return err;
669 }
670
671 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
672 struct xfrm_usersa_id *p,
673 struct nlattr **attrs,
674 int *errp)
675 {
676 struct xfrm_state *x = NULL;
677 struct xfrm_mark m;
678 int err;
679 u32 mark = xfrm_mark_get(attrs, &m);
680
681 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
682 err = -ESRCH;
683 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
684 } else {
685 xfrm_address_t *saddr = NULL;
686
687 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
688 if (!saddr) {
689 err = -EINVAL;
690 goto out;
691 }
692
693 err = -ESRCH;
694 x = xfrm_state_lookup_byaddr(net, mark,
695 &p->daddr, saddr,
696 p->proto, p->family);
697 }
698
699 out:
700 if (!x && errp)
701 *errp = err;
702 return x;
703 }
704
705 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
706 struct nlattr **attrs)
707 {
708 struct net *net = sock_net(skb->sk);
709 struct xfrm_state *x;
710 int err = -ESRCH;
711 struct km_event c;
712 struct xfrm_usersa_id *p = nlmsg_data(nlh);
713
714 x = xfrm_user_state_lookup(net, p, attrs, &err);
715 if (x == NULL)
716 return err;
717
718 if ((err = security_xfrm_state_delete(x)) != 0)
719 goto out;
720
721 if (xfrm_state_kern(x)) {
722 err = -EPERM;
723 goto out;
724 }
725
726 err = xfrm_state_delete(x);
727
728 if (err < 0)
729 goto out;
730
731 c.seq = nlh->nlmsg_seq;
732 c.portid = nlh->nlmsg_pid;
733 c.event = nlh->nlmsg_type;
734 km_state_notify(x, &c);
735
736 out:
737 xfrm_audit_state_delete(x, err ? 0 : 1, true);
738 xfrm_state_put(x);
739 return err;
740 }
741
742 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
743 {
744 memset(p, 0, sizeof(*p));
745 memcpy(&p->id, &x->id, sizeof(p->id));
746 memcpy(&p->sel, &x->sel, sizeof(p->sel));
747 memcpy(&p->lft, &x->lft, sizeof(p->lft));
748 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
749 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
750 put_unaligned(x->stats.replay, &p->stats.replay);
751 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
752 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
753 p->mode = x->props.mode;
754 p->replay_window = x->props.replay_window;
755 p->reqid = x->props.reqid;
756 p->family = x->props.family;
757 p->flags = x->props.flags;
758 p->seq = x->km.seq;
759 }
760
761 struct xfrm_dump_info {
762 struct sk_buff *in_skb;
763 struct sk_buff *out_skb;
764 u32 nlmsg_seq;
765 u16 nlmsg_flags;
766 };
767
768 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
769 {
770 struct xfrm_user_sec_ctx *uctx;
771 struct nlattr *attr;
772 int ctx_size = sizeof(*uctx) + s->ctx_len;
773
774 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
775 if (attr == NULL)
776 return -EMSGSIZE;
777
778 uctx = nla_data(attr);
779 uctx->exttype = XFRMA_SEC_CTX;
780 uctx->len = ctx_size;
781 uctx->ctx_doi = s->ctx_doi;
782 uctx->ctx_alg = s->ctx_alg;
783 uctx->ctx_len = s->ctx_len;
784 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
785
786 return 0;
787 }
788
789 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
790 {
791 struct xfrm_user_offload *xuo;
792 struct nlattr *attr;
793
794 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
795 if (attr == NULL)
796 return -EMSGSIZE;
797
798 xuo = nla_data(attr);
799
800 xuo->ifindex = xso->dev->ifindex;
801 xuo->flags = xso->flags;
802
803 return 0;
804 }
805
806 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
807 {
808 struct xfrm_algo *algo;
809 struct nlattr *nla;
810
811 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
812 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
813 if (!nla)
814 return -EMSGSIZE;
815
816 algo = nla_data(nla);
817 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
818 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
819 algo->alg_key_len = auth->alg_key_len;
820
821 return 0;
822 }
823
824 /* Don't change this without updating xfrm_sa_len! */
825 static int copy_to_user_state_extra(struct xfrm_state *x,
826 struct xfrm_usersa_info *p,
827 struct sk_buff *skb)
828 {
829 int ret = 0;
830
831 copy_to_user_state(x, p);
832
833 if (x->props.extra_flags) {
834 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
835 x->props.extra_flags);
836 if (ret)
837 goto out;
838 }
839
840 if (x->coaddr) {
841 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
842 if (ret)
843 goto out;
844 }
845 if (x->lastused) {
846 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
847 XFRMA_PAD);
848 if (ret)
849 goto out;
850 }
851 if (x->aead) {
852 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
853 if (ret)
854 goto out;
855 }
856 if (x->aalg) {
857 ret = copy_to_user_auth(x->aalg, skb);
858 if (!ret)
859 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
860 xfrm_alg_auth_len(x->aalg), x->aalg);
861 if (ret)
862 goto out;
863 }
864 if (x->ealg) {
865 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
866 if (ret)
867 goto out;
868 }
869 if (x->calg) {
870 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
871 if (ret)
872 goto out;
873 }
874 if (x->encap) {
875 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
876 if (ret)
877 goto out;
878 }
879 if (x->tfcpad) {
880 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
881 if (ret)
882 goto out;
883 }
884 ret = xfrm_mark_put(skb, &x->mark);
885 if (ret)
886 goto out;
887 if (x->replay_esn)
888 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
889 xfrm_replay_state_esn_len(x->replay_esn),
890 x->replay_esn);
891 else
892 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
893 &x->replay);
894 if (ret)
895 goto out;
896 if(x->xso.dev)
897 ret = copy_user_offload(&x->xso, skb);
898 if (ret)
899 goto out;
900 if (x->security)
901 ret = copy_sec_ctx(x->security, skb);
902 out:
903 return ret;
904 }
905
906 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
907 {
908 struct xfrm_dump_info *sp = ptr;
909 struct sk_buff *in_skb = sp->in_skb;
910 struct sk_buff *skb = sp->out_skb;
911 struct xfrm_usersa_info *p;
912 struct nlmsghdr *nlh;
913 int err;
914
915 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
916 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
917 if (nlh == NULL)
918 return -EMSGSIZE;
919
920 p = nlmsg_data(nlh);
921
922 err = copy_to_user_state_extra(x, p, skb);
923 if (err) {
924 nlmsg_cancel(skb, nlh);
925 return err;
926 }
927 nlmsg_end(skb, nlh);
928 return 0;
929 }
930
931 static int xfrm_dump_sa_done(struct netlink_callback *cb)
932 {
933 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
934 struct sock *sk = cb->skb->sk;
935 struct net *net = sock_net(sk);
936
937 if (cb->args[0])
938 xfrm_state_walk_done(walk, net);
939 return 0;
940 }
941
942 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
943 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
944 {
945 struct net *net = sock_net(skb->sk);
946 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
947 struct xfrm_dump_info info;
948
949 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
950 sizeof(cb->args) - sizeof(cb->args[0]));
951
952 info.in_skb = cb->skb;
953 info.out_skb = skb;
954 info.nlmsg_seq = cb->nlh->nlmsg_seq;
955 info.nlmsg_flags = NLM_F_MULTI;
956
957 if (!cb->args[0]) {
958 struct nlattr *attrs[XFRMA_MAX+1];
959 struct xfrm_address_filter *filter = NULL;
960 u8 proto = 0;
961 int err;
962
963 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
964 NULL);
965 if (err < 0)
966 return err;
967
968 if (attrs[XFRMA_ADDRESS_FILTER]) {
969 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
970 sizeof(*filter), GFP_KERNEL);
971 if (filter == NULL)
972 return -ENOMEM;
973 }
974
975 if (attrs[XFRMA_PROTO])
976 proto = nla_get_u8(attrs[XFRMA_PROTO]);
977
978 xfrm_state_walk_init(walk, proto, filter);
979 cb->args[0] = 1;
980 }
981
982 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
983
984 return skb->len;
985 }
986
987 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
988 struct xfrm_state *x, u32 seq)
989 {
990 struct xfrm_dump_info info;
991 struct sk_buff *skb;
992 int err;
993
994 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
995 if (!skb)
996 return ERR_PTR(-ENOMEM);
997
998 info.in_skb = in_skb;
999 info.out_skb = skb;
1000 info.nlmsg_seq = seq;
1001 info.nlmsg_flags = 0;
1002
1003 err = dump_one_state(x, 0, &info);
1004 if (err) {
1005 kfree_skb(skb);
1006 return ERR_PTR(err);
1007 }
1008
1009 return skb;
1010 }
1011
1012 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1013 * Must be called with RCU read lock.
1014 */
1015 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1016 u32 pid, unsigned int group)
1017 {
1018 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1019
1020 if (nlsk)
1021 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1022 else
1023 return -1;
1024 }
1025
1026 static inline size_t xfrm_spdinfo_msgsize(void)
1027 {
1028 return NLMSG_ALIGN(4)
1029 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1030 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1031 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1032 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1033 }
1034
1035 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1036 u32 portid, u32 seq, u32 flags)
1037 {
1038 struct xfrmk_spdinfo si;
1039 struct xfrmu_spdinfo spc;
1040 struct xfrmu_spdhinfo sph;
1041 struct xfrmu_spdhthresh spt4, spt6;
1042 struct nlmsghdr *nlh;
1043 int err;
1044 u32 *f;
1045 unsigned lseq;
1046
1047 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1048 if (nlh == NULL) /* shouldn't really happen ... */
1049 return -EMSGSIZE;
1050
1051 f = nlmsg_data(nlh);
1052 *f = flags;
1053 xfrm_spd_getinfo(net, &si);
1054 spc.incnt = si.incnt;
1055 spc.outcnt = si.outcnt;
1056 spc.fwdcnt = si.fwdcnt;
1057 spc.inscnt = si.inscnt;
1058 spc.outscnt = si.outscnt;
1059 spc.fwdscnt = si.fwdscnt;
1060 sph.spdhcnt = si.spdhcnt;
1061 sph.spdhmcnt = si.spdhmcnt;
1062
1063 do {
1064 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1065
1066 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1067 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1068 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1069 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1070 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1071
1072 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1073 if (!err)
1074 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1075 if (!err)
1076 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1077 if (!err)
1078 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1079 if (err) {
1080 nlmsg_cancel(skb, nlh);
1081 return err;
1082 }
1083
1084 nlmsg_end(skb, nlh);
1085 return 0;
1086 }
1087
1088 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1089 struct nlattr **attrs)
1090 {
1091 struct net *net = sock_net(skb->sk);
1092 struct xfrmu_spdhthresh *thresh4 = NULL;
1093 struct xfrmu_spdhthresh *thresh6 = NULL;
1094
1095 /* selector prefixlen thresholds to hash policies */
1096 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1097 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1098
1099 if (nla_len(rta) < sizeof(*thresh4))
1100 return -EINVAL;
1101 thresh4 = nla_data(rta);
1102 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1103 return -EINVAL;
1104 }
1105 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1106 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1107
1108 if (nla_len(rta) < sizeof(*thresh6))
1109 return -EINVAL;
1110 thresh6 = nla_data(rta);
1111 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1112 return -EINVAL;
1113 }
1114
1115 if (thresh4 || thresh6) {
1116 write_seqlock(&net->xfrm.policy_hthresh.lock);
1117 if (thresh4) {
1118 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1119 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1120 }
1121 if (thresh6) {
1122 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1123 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1124 }
1125 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1126
1127 xfrm_policy_hash_rebuild(net);
1128 }
1129
1130 return 0;
1131 }
1132
1133 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1134 struct nlattr **attrs)
1135 {
1136 struct net *net = sock_net(skb->sk);
1137 struct sk_buff *r_skb;
1138 u32 *flags = nlmsg_data(nlh);
1139 u32 sportid = NETLINK_CB(skb).portid;
1140 u32 seq = nlh->nlmsg_seq;
1141
1142 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1143 if (r_skb == NULL)
1144 return -ENOMEM;
1145
1146 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
1147 BUG();
1148
1149 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1150 }
1151
1152 static inline size_t xfrm_sadinfo_msgsize(void)
1153 {
1154 return NLMSG_ALIGN(4)
1155 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1156 + nla_total_size(4); /* XFRMA_SAD_CNT */
1157 }
1158
1159 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1160 u32 portid, u32 seq, u32 flags)
1161 {
1162 struct xfrmk_sadinfo si;
1163 struct xfrmu_sadhinfo sh;
1164 struct nlmsghdr *nlh;
1165 int err;
1166 u32 *f;
1167
1168 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1169 if (nlh == NULL) /* shouldn't really happen ... */
1170 return -EMSGSIZE;
1171
1172 f = nlmsg_data(nlh);
1173 *f = flags;
1174 xfrm_sad_getinfo(net, &si);
1175
1176 sh.sadhmcnt = si.sadhmcnt;
1177 sh.sadhcnt = si.sadhcnt;
1178
1179 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1180 if (!err)
1181 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1182 if (err) {
1183 nlmsg_cancel(skb, nlh);
1184 return err;
1185 }
1186
1187 nlmsg_end(skb, nlh);
1188 return 0;
1189 }
1190
1191 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1192 struct nlattr **attrs)
1193 {
1194 struct net *net = sock_net(skb->sk);
1195 struct sk_buff *r_skb;
1196 u32 *flags = nlmsg_data(nlh);
1197 u32 sportid = NETLINK_CB(skb).portid;
1198 u32 seq = nlh->nlmsg_seq;
1199
1200 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1201 if (r_skb == NULL)
1202 return -ENOMEM;
1203
1204 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
1205 BUG();
1206
1207 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1208 }
1209
1210 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1211 struct nlattr **attrs)
1212 {
1213 struct net *net = sock_net(skb->sk);
1214 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1215 struct xfrm_state *x;
1216 struct sk_buff *resp_skb;
1217 int err = -ESRCH;
1218
1219 x = xfrm_user_state_lookup(net, p, attrs, &err);
1220 if (x == NULL)
1221 goto out_noput;
1222
1223 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1224 if (IS_ERR(resp_skb)) {
1225 err = PTR_ERR(resp_skb);
1226 } else {
1227 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1228 }
1229 xfrm_state_put(x);
1230 out_noput:
1231 return err;
1232 }
1233
1234 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1235 struct nlattr **attrs)
1236 {
1237 struct net *net = sock_net(skb->sk);
1238 struct xfrm_state *x;
1239 struct xfrm_userspi_info *p;
1240 struct sk_buff *resp_skb;
1241 xfrm_address_t *daddr;
1242 int family;
1243 int err;
1244 u32 mark;
1245 struct xfrm_mark m;
1246
1247 p = nlmsg_data(nlh);
1248 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1249 if (err)
1250 goto out_noput;
1251
1252 family = p->info.family;
1253 daddr = &p->info.id.daddr;
1254
1255 x = NULL;
1256
1257 mark = xfrm_mark_get(attrs, &m);
1258 if (p->info.seq) {
1259 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1260 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1261 xfrm_state_put(x);
1262 x = NULL;
1263 }
1264 }
1265
1266 if (!x)
1267 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1268 p->info.id.proto, daddr,
1269 &p->info.saddr, 1,
1270 family);
1271 err = -ENOENT;
1272 if (x == NULL)
1273 goto out_noput;
1274
1275 err = xfrm_alloc_spi(x, p->min, p->max);
1276 if (err)
1277 goto out;
1278
1279 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1280 if (IS_ERR(resp_skb)) {
1281 err = PTR_ERR(resp_skb);
1282 goto out;
1283 }
1284
1285 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1286
1287 out:
1288 xfrm_state_put(x);
1289 out_noput:
1290 return err;
1291 }
1292
1293 static int verify_policy_dir(u8 dir)
1294 {
1295 switch (dir) {
1296 case XFRM_POLICY_IN:
1297 case XFRM_POLICY_OUT:
1298 case XFRM_POLICY_FWD:
1299 break;
1300
1301 default:
1302 return -EINVAL;
1303 }
1304
1305 return 0;
1306 }
1307
1308 static int verify_policy_type(u8 type)
1309 {
1310 switch (type) {
1311 case XFRM_POLICY_TYPE_MAIN:
1312 #ifdef CONFIG_XFRM_SUB_POLICY
1313 case XFRM_POLICY_TYPE_SUB:
1314 #endif
1315 break;
1316
1317 default:
1318 return -EINVAL;
1319 }
1320
1321 return 0;
1322 }
1323
1324 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1325 {
1326 int ret;
1327
1328 switch (p->share) {
1329 case XFRM_SHARE_ANY:
1330 case XFRM_SHARE_SESSION:
1331 case XFRM_SHARE_USER:
1332 case XFRM_SHARE_UNIQUE:
1333 break;
1334
1335 default:
1336 return -EINVAL;
1337 }
1338
1339 switch (p->action) {
1340 case XFRM_POLICY_ALLOW:
1341 case XFRM_POLICY_BLOCK:
1342 break;
1343
1344 default:
1345 return -EINVAL;
1346 }
1347
1348 switch (p->sel.family) {
1349 case AF_INET:
1350 break;
1351
1352 case AF_INET6:
1353 #if IS_ENABLED(CONFIG_IPV6)
1354 break;
1355 #else
1356 return -EAFNOSUPPORT;
1357 #endif
1358
1359 default:
1360 return -EINVAL;
1361 }
1362
1363 ret = verify_policy_dir(p->dir);
1364 if (ret)
1365 return ret;
1366 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1367 return -EINVAL;
1368
1369 return 0;
1370 }
1371
1372 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1373 {
1374 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1375 struct xfrm_user_sec_ctx *uctx;
1376
1377 if (!rt)
1378 return 0;
1379
1380 uctx = nla_data(rt);
1381 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1382 }
1383
1384 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1385 int nr)
1386 {
1387 int i;
1388
1389 xp->xfrm_nr = nr;
1390 for (i = 0; i < nr; i++, ut++) {
1391 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1392
1393 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1394 memcpy(&t->saddr, &ut->saddr,
1395 sizeof(xfrm_address_t));
1396 t->reqid = ut->reqid;
1397 t->mode = ut->mode;
1398 t->share = ut->share;
1399 t->optional = ut->optional;
1400 t->aalgos = ut->aalgos;
1401 t->ealgos = ut->ealgos;
1402 t->calgos = ut->calgos;
1403 /* If all masks are ~0, then we allow all algorithms. */
1404 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1405 t->encap_family = ut->family;
1406 }
1407 }
1408
1409 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1410 {
1411 int i;
1412
1413 if (nr > XFRM_MAX_DEPTH)
1414 return -EINVAL;
1415
1416 for (i = 0; i < nr; i++) {
1417 /* We never validated the ut->family value, so many
1418 * applications simply leave it at zero. The check was
1419 * never made and ut->family was ignored because all
1420 * templates could be assumed to have the same family as
1421 * the policy itself. Now that we will have ipv4-in-ipv6
1422 * and ipv6-in-ipv4 tunnels, this is no longer true.
1423 */
1424 if (!ut[i].family)
1425 ut[i].family = family;
1426
1427 switch (ut[i].family) {
1428 case AF_INET:
1429 break;
1430 #if IS_ENABLED(CONFIG_IPV6)
1431 case AF_INET6:
1432 break;
1433 #endif
1434 default:
1435 return -EINVAL;
1436 }
1437 }
1438
1439 return 0;
1440 }
1441
1442 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1443 {
1444 struct nlattr *rt = attrs[XFRMA_TMPL];
1445
1446 if (!rt) {
1447 pol->xfrm_nr = 0;
1448 } else {
1449 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1450 int nr = nla_len(rt) / sizeof(*utmpl);
1451 int err;
1452
1453 err = validate_tmpl(nr, utmpl, pol->family);
1454 if (err)
1455 return err;
1456
1457 copy_templates(pol, utmpl, nr);
1458 }
1459 return 0;
1460 }
1461
1462 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1463 {
1464 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1465 struct xfrm_userpolicy_type *upt;
1466 u8 type = XFRM_POLICY_TYPE_MAIN;
1467 int err;
1468
1469 if (rt) {
1470 upt = nla_data(rt);
1471 type = upt->type;
1472 }
1473
1474 err = verify_policy_type(type);
1475 if (err)
1476 return err;
1477
1478 *tp = type;
1479 return 0;
1480 }
1481
1482 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1483 {
1484 xp->priority = p->priority;
1485 xp->index = p->index;
1486 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1487 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1488 xp->action = p->action;
1489 xp->flags = p->flags;
1490 xp->family = p->sel.family;
1491 /* XXX xp->share = p->share; */
1492 }
1493
1494 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1495 {
1496 memset(p, 0, sizeof(*p));
1497 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1498 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1499 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1500 p->priority = xp->priority;
1501 p->index = xp->index;
1502 p->sel.family = xp->family;
1503 p->dir = dir;
1504 p->action = xp->action;
1505 p->flags = xp->flags;
1506 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1507 }
1508
1509 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1510 {
1511 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1512 int err;
1513
1514 if (!xp) {
1515 *errp = -ENOMEM;
1516 return NULL;
1517 }
1518
1519 copy_from_user_policy(xp, p);
1520
1521 err = copy_from_user_policy_type(&xp->type, attrs);
1522 if (err)
1523 goto error;
1524
1525 if (!(err = copy_from_user_tmpl(xp, attrs)))
1526 err = copy_from_user_sec_ctx(xp, attrs);
1527 if (err)
1528 goto error;
1529
1530 xfrm_mark_get(attrs, &xp->mark);
1531
1532 return xp;
1533 error:
1534 *errp = err;
1535 xp->walk.dead = 1;
1536 xfrm_policy_destroy(xp);
1537 return NULL;
1538 }
1539
1540 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1541 struct nlattr **attrs)
1542 {
1543 struct net *net = sock_net(skb->sk);
1544 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1545 struct xfrm_policy *xp;
1546 struct km_event c;
1547 int err;
1548 int excl;
1549
1550 err = verify_newpolicy_info(p);
1551 if (err)
1552 return err;
1553 err = verify_sec_ctx_len(attrs);
1554 if (err)
1555 return err;
1556
1557 xp = xfrm_policy_construct(net, p, attrs, &err);
1558 if (!xp)
1559 return err;
1560
1561 /* shouldn't excl be based on nlh flags??
1562 * Aha! this is anti-netlink really i.e more pfkey derived
1563 * in netlink excl is a flag and you wouldnt need
1564 * a type XFRM_MSG_UPDPOLICY - JHS */
1565 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1566 err = xfrm_policy_insert(p->dir, xp, excl);
1567 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1568
1569 if (err) {
1570 security_xfrm_policy_free(xp->security);
1571 kfree(xp);
1572 return err;
1573 }
1574
1575 c.event = nlh->nlmsg_type;
1576 c.seq = nlh->nlmsg_seq;
1577 c.portid = nlh->nlmsg_pid;
1578 km_policy_notify(xp, p->dir, &c);
1579
1580 xfrm_pol_put(xp);
1581
1582 return 0;
1583 }
1584
1585 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1586 {
1587 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1588 int i;
1589
1590 if (xp->xfrm_nr == 0)
1591 return 0;
1592
1593 for (i = 0; i < xp->xfrm_nr; i++) {
1594 struct xfrm_user_tmpl *up = &vec[i];
1595 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1596
1597 memset(up, 0, sizeof(*up));
1598 memcpy(&up->id, &kp->id, sizeof(up->id));
1599 up->family = kp->encap_family;
1600 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1601 up->reqid = kp->reqid;
1602 up->mode = kp->mode;
1603 up->share = kp->share;
1604 up->optional = kp->optional;
1605 up->aalgos = kp->aalgos;
1606 up->ealgos = kp->ealgos;
1607 up->calgos = kp->calgos;
1608 }
1609
1610 return nla_put(skb, XFRMA_TMPL,
1611 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1612 }
1613
1614 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1615 {
1616 if (x->security) {
1617 return copy_sec_ctx(x->security, skb);
1618 }
1619 return 0;
1620 }
1621
1622 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1623 {
1624 if (xp->security)
1625 return copy_sec_ctx(xp->security, skb);
1626 return 0;
1627 }
1628 static inline size_t userpolicy_type_attrsize(void)
1629 {
1630 #ifdef CONFIG_XFRM_SUB_POLICY
1631 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1632 #else
1633 return 0;
1634 #endif
1635 }
1636
1637 #ifdef CONFIG_XFRM_SUB_POLICY
1638 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1639 {
1640 struct xfrm_userpolicy_type upt = {
1641 .type = type,
1642 };
1643
1644 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1645 }
1646
1647 #else
1648 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1649 {
1650 return 0;
1651 }
1652 #endif
1653
1654 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1655 {
1656 struct xfrm_dump_info *sp = ptr;
1657 struct xfrm_userpolicy_info *p;
1658 struct sk_buff *in_skb = sp->in_skb;
1659 struct sk_buff *skb = sp->out_skb;
1660 struct nlmsghdr *nlh;
1661 int err;
1662
1663 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1664 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1665 if (nlh == NULL)
1666 return -EMSGSIZE;
1667
1668 p = nlmsg_data(nlh);
1669 copy_to_user_policy(xp, p, dir);
1670 err = copy_to_user_tmpl(xp, skb);
1671 if (!err)
1672 err = copy_to_user_sec_ctx(xp, skb);
1673 if (!err)
1674 err = copy_to_user_policy_type(xp->type, skb);
1675 if (!err)
1676 err = xfrm_mark_put(skb, &xp->mark);
1677 if (err) {
1678 nlmsg_cancel(skb, nlh);
1679 return err;
1680 }
1681 nlmsg_end(skb, nlh);
1682 return 0;
1683 }
1684
1685 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1686 {
1687 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1688 struct net *net = sock_net(cb->skb->sk);
1689
1690 xfrm_policy_walk_done(walk, net);
1691 return 0;
1692 }
1693
1694 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1695 {
1696 struct net *net = sock_net(skb->sk);
1697 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1698 struct xfrm_dump_info info;
1699
1700 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1701 sizeof(cb->args) - sizeof(cb->args[0]));
1702
1703 info.in_skb = cb->skb;
1704 info.out_skb = skb;
1705 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1706 info.nlmsg_flags = NLM_F_MULTI;
1707
1708 if (!cb->args[0]) {
1709 cb->args[0] = 1;
1710 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1711 }
1712
1713 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1714
1715 return skb->len;
1716 }
1717
1718 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1719 struct xfrm_policy *xp,
1720 int dir, u32 seq)
1721 {
1722 struct xfrm_dump_info info;
1723 struct sk_buff *skb;
1724 int err;
1725
1726 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1727 if (!skb)
1728 return ERR_PTR(-ENOMEM);
1729
1730 info.in_skb = in_skb;
1731 info.out_skb = skb;
1732 info.nlmsg_seq = seq;
1733 info.nlmsg_flags = 0;
1734
1735 err = dump_one_policy(xp, dir, 0, &info);
1736 if (err) {
1737 kfree_skb(skb);
1738 return ERR_PTR(err);
1739 }
1740
1741 return skb;
1742 }
1743
1744 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1745 struct nlattr **attrs)
1746 {
1747 struct net *net = sock_net(skb->sk);
1748 struct xfrm_policy *xp;
1749 struct xfrm_userpolicy_id *p;
1750 u8 type = XFRM_POLICY_TYPE_MAIN;
1751 int err;
1752 struct km_event c;
1753 int delete;
1754 struct xfrm_mark m;
1755 u32 mark = xfrm_mark_get(attrs, &m);
1756
1757 p = nlmsg_data(nlh);
1758 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1759
1760 err = copy_from_user_policy_type(&type, attrs);
1761 if (err)
1762 return err;
1763
1764 err = verify_policy_dir(p->dir);
1765 if (err)
1766 return err;
1767
1768 if (p->index)
1769 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1770 else {
1771 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1772 struct xfrm_sec_ctx *ctx;
1773
1774 err = verify_sec_ctx_len(attrs);
1775 if (err)
1776 return err;
1777
1778 ctx = NULL;
1779 if (rt) {
1780 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1781
1782 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1783 if (err)
1784 return err;
1785 }
1786 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1787 ctx, delete, &err);
1788 security_xfrm_policy_free(ctx);
1789 }
1790 if (xp == NULL)
1791 return -ENOENT;
1792
1793 if (!delete) {
1794 struct sk_buff *resp_skb;
1795
1796 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1797 if (IS_ERR(resp_skb)) {
1798 err = PTR_ERR(resp_skb);
1799 } else {
1800 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1801 NETLINK_CB(skb).portid);
1802 }
1803 } else {
1804 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1805
1806 if (err != 0)
1807 goto out;
1808
1809 c.data.byid = p->index;
1810 c.event = nlh->nlmsg_type;
1811 c.seq = nlh->nlmsg_seq;
1812 c.portid = nlh->nlmsg_pid;
1813 km_policy_notify(xp, p->dir, &c);
1814 }
1815
1816 out:
1817 xfrm_pol_put(xp);
1818 if (delete && err == 0)
1819 xfrm_garbage_collect(net);
1820 return err;
1821 }
1822
1823 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1824 struct nlattr **attrs)
1825 {
1826 struct net *net = sock_net(skb->sk);
1827 struct km_event c;
1828 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1829 int err;
1830
1831 err = xfrm_state_flush(net, p->proto, true);
1832 if (err) {
1833 if (err == -ESRCH) /* empty table */
1834 return 0;
1835 return err;
1836 }
1837 c.data.proto = p->proto;
1838 c.event = nlh->nlmsg_type;
1839 c.seq = nlh->nlmsg_seq;
1840 c.portid = nlh->nlmsg_pid;
1841 c.net = net;
1842 km_state_notify(NULL, &c);
1843
1844 return 0;
1845 }
1846
1847 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1848 {
1849 size_t replay_size = x->replay_esn ?
1850 xfrm_replay_state_esn_len(x->replay_esn) :
1851 sizeof(struct xfrm_replay_state);
1852
1853 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1854 + nla_total_size(replay_size)
1855 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1856 + nla_total_size(sizeof(struct xfrm_mark))
1857 + nla_total_size(4) /* XFRM_AE_RTHR */
1858 + nla_total_size(4); /* XFRM_AE_ETHR */
1859 }
1860
1861 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1862 {
1863 struct xfrm_aevent_id *id;
1864 struct nlmsghdr *nlh;
1865 int err;
1866
1867 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1868 if (nlh == NULL)
1869 return -EMSGSIZE;
1870
1871 id = nlmsg_data(nlh);
1872 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1873 id->sa_id.spi = x->id.spi;
1874 id->sa_id.family = x->props.family;
1875 id->sa_id.proto = x->id.proto;
1876 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1877 id->reqid = x->props.reqid;
1878 id->flags = c->data.aevent;
1879
1880 if (x->replay_esn) {
1881 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1882 xfrm_replay_state_esn_len(x->replay_esn),
1883 x->replay_esn);
1884 } else {
1885 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1886 &x->replay);
1887 }
1888 if (err)
1889 goto out_cancel;
1890 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1891 XFRMA_PAD);
1892 if (err)
1893 goto out_cancel;
1894
1895 if (id->flags & XFRM_AE_RTHR) {
1896 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1897 if (err)
1898 goto out_cancel;
1899 }
1900 if (id->flags & XFRM_AE_ETHR) {
1901 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1902 x->replay_maxage * 10 / HZ);
1903 if (err)
1904 goto out_cancel;
1905 }
1906 err = xfrm_mark_put(skb, &x->mark);
1907 if (err)
1908 goto out_cancel;
1909
1910 nlmsg_end(skb, nlh);
1911 return 0;
1912
1913 out_cancel:
1914 nlmsg_cancel(skb, nlh);
1915 return err;
1916 }
1917
1918 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1919 struct nlattr **attrs)
1920 {
1921 struct net *net = sock_net(skb->sk);
1922 struct xfrm_state *x;
1923 struct sk_buff *r_skb;
1924 int err;
1925 struct km_event c;
1926 u32 mark;
1927 struct xfrm_mark m;
1928 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1929 struct xfrm_usersa_id *id = &p->sa_id;
1930
1931 mark = xfrm_mark_get(attrs, &m);
1932
1933 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1934 if (x == NULL)
1935 return -ESRCH;
1936
1937 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1938 if (r_skb == NULL) {
1939 xfrm_state_put(x);
1940 return -ENOMEM;
1941 }
1942
1943 /*
1944 * XXX: is this lock really needed - none of the other
1945 * gets lock (the concern is things getting updated
1946 * while we are still reading) - jhs
1947 */
1948 spin_lock_bh(&x->lock);
1949 c.data.aevent = p->flags;
1950 c.seq = nlh->nlmsg_seq;
1951 c.portid = nlh->nlmsg_pid;
1952
1953 if (build_aevent(r_skb, x, &c) < 0)
1954 BUG();
1955 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
1956 spin_unlock_bh(&x->lock);
1957 xfrm_state_put(x);
1958 return err;
1959 }
1960
1961 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1962 struct nlattr **attrs)
1963 {
1964 struct net *net = sock_net(skb->sk);
1965 struct xfrm_state *x;
1966 struct km_event c;
1967 int err = -EINVAL;
1968 u32 mark = 0;
1969 struct xfrm_mark m;
1970 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1971 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1972 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1973 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1974 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1975 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
1976
1977 if (!lt && !rp && !re && !et && !rt)
1978 return err;
1979
1980 /* pedantic mode - thou shalt sayeth replaceth */
1981 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1982 return err;
1983
1984 mark = xfrm_mark_get(attrs, &m);
1985
1986 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1987 if (x == NULL)
1988 return -ESRCH;
1989
1990 if (x->km.state != XFRM_STATE_VALID)
1991 goto out;
1992
1993 err = xfrm_replay_verify_len(x->replay_esn, re);
1994 if (err)
1995 goto out;
1996
1997 spin_lock_bh(&x->lock);
1998 xfrm_update_ae_params(x, attrs, 1);
1999 spin_unlock_bh(&x->lock);
2000
2001 c.event = nlh->nlmsg_type;
2002 c.seq = nlh->nlmsg_seq;
2003 c.portid = nlh->nlmsg_pid;
2004 c.data.aevent = XFRM_AE_CU;
2005 km_state_notify(x, &c);
2006 err = 0;
2007 out:
2008 xfrm_state_put(x);
2009 return err;
2010 }
2011
2012 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2013 struct nlattr **attrs)
2014 {
2015 struct net *net = sock_net(skb->sk);
2016 struct km_event c;
2017 u8 type = XFRM_POLICY_TYPE_MAIN;
2018 int err;
2019
2020 err = copy_from_user_policy_type(&type, attrs);
2021 if (err)
2022 return err;
2023
2024 err = xfrm_policy_flush(net, type, true);
2025 if (err) {
2026 if (err == -ESRCH) /* empty table */
2027 return 0;
2028 return err;
2029 }
2030 xfrm_garbage_collect(net);
2031
2032 c.data.type = type;
2033 c.event = nlh->nlmsg_type;
2034 c.seq = nlh->nlmsg_seq;
2035 c.portid = nlh->nlmsg_pid;
2036 c.net = net;
2037 km_policy_notify(NULL, 0, &c);
2038 return 0;
2039 }
2040
2041 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2042 struct nlattr **attrs)
2043 {
2044 struct net *net = sock_net(skb->sk);
2045 struct xfrm_policy *xp;
2046 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2047 struct xfrm_userpolicy_info *p = &up->pol;
2048 u8 type = XFRM_POLICY_TYPE_MAIN;
2049 int err = -ENOENT;
2050 struct xfrm_mark m;
2051 u32 mark = xfrm_mark_get(attrs, &m);
2052
2053 err = copy_from_user_policy_type(&type, attrs);
2054 if (err)
2055 return err;
2056
2057 err = verify_policy_dir(p->dir);
2058 if (err)
2059 return err;
2060
2061 if (p->index)
2062 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
2063 else {
2064 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2065 struct xfrm_sec_ctx *ctx;
2066
2067 err = verify_sec_ctx_len(attrs);
2068 if (err)
2069 return err;
2070
2071 ctx = NULL;
2072 if (rt) {
2073 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2074
2075 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2076 if (err)
2077 return err;
2078 }
2079 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
2080 &p->sel, ctx, 0, &err);
2081 security_xfrm_policy_free(ctx);
2082 }
2083 if (xp == NULL)
2084 return -ENOENT;
2085
2086 if (unlikely(xp->walk.dead))
2087 goto out;
2088
2089 err = 0;
2090 if (up->hard) {
2091 xfrm_policy_delete(xp, p->dir);
2092 xfrm_audit_policy_delete(xp, 1, true);
2093 }
2094 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2095
2096 out:
2097 xfrm_pol_put(xp);
2098 return err;
2099 }
2100
2101 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2102 struct nlattr **attrs)
2103 {
2104 struct net *net = sock_net(skb->sk);
2105 struct xfrm_state *x;
2106 int err;
2107 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2108 struct xfrm_usersa_info *p = &ue->state;
2109 struct xfrm_mark m;
2110 u32 mark = xfrm_mark_get(attrs, &m);
2111
2112 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2113
2114 err = -ENOENT;
2115 if (x == NULL)
2116 return err;
2117
2118 spin_lock_bh(&x->lock);
2119 err = -EINVAL;
2120 if (x->km.state != XFRM_STATE_VALID)
2121 goto out;
2122 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2123
2124 if (ue->hard) {
2125 __xfrm_state_delete(x);
2126 xfrm_audit_state_delete(x, 1, true);
2127 }
2128 err = 0;
2129 out:
2130 spin_unlock_bh(&x->lock);
2131 xfrm_state_put(x);
2132 return err;
2133 }
2134
2135 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2136 struct nlattr **attrs)
2137 {
2138 struct net *net = sock_net(skb->sk);
2139 struct xfrm_policy *xp;
2140 struct xfrm_user_tmpl *ut;
2141 int i;
2142 struct nlattr *rt = attrs[XFRMA_TMPL];
2143 struct xfrm_mark mark;
2144
2145 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2146 struct xfrm_state *x = xfrm_state_alloc(net);
2147 int err = -ENOMEM;
2148
2149 if (!x)
2150 goto nomem;
2151
2152 xfrm_mark_get(attrs, &mark);
2153
2154 err = verify_newpolicy_info(&ua->policy);
2155 if (err)
2156 goto free_state;
2157
2158 /* build an XP */
2159 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2160 if (!xp)
2161 goto free_state;
2162
2163 memcpy(&x->id, &ua->id, sizeof(ua->id));
2164 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2165 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2166 xp->mark.m = x->mark.m = mark.m;
2167 xp->mark.v = x->mark.v = mark.v;
2168 ut = nla_data(rt);
2169 /* extract the templates and for each call km_key */
2170 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2171 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2172 memcpy(&x->id, &t->id, sizeof(x->id));
2173 x->props.mode = t->mode;
2174 x->props.reqid = t->reqid;
2175 x->props.family = ut->family;
2176 t->aalgos = ua->aalgos;
2177 t->ealgos = ua->ealgos;
2178 t->calgos = ua->calgos;
2179 err = km_query(x, t, xp);
2180
2181 }
2182
2183 kfree(x);
2184 kfree(xp);
2185
2186 return 0;
2187
2188 free_state:
2189 kfree(x);
2190 nomem:
2191 return err;
2192 }
2193
2194 #ifdef CONFIG_XFRM_MIGRATE
2195 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2196 struct xfrm_kmaddress *k,
2197 struct nlattr **attrs, int *num)
2198 {
2199 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2200 struct xfrm_user_migrate *um;
2201 int i, num_migrate;
2202
2203 if (k != NULL) {
2204 struct xfrm_user_kmaddress *uk;
2205
2206 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2207 memcpy(&k->local, &uk->local, sizeof(k->local));
2208 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2209 k->family = uk->family;
2210 k->reserved = uk->reserved;
2211 }
2212
2213 um = nla_data(rt);
2214 num_migrate = nla_len(rt) / sizeof(*um);
2215
2216 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2217 return -EINVAL;
2218
2219 for (i = 0; i < num_migrate; i++, um++, ma++) {
2220 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2221 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2222 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2223 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2224
2225 ma->proto = um->proto;
2226 ma->mode = um->mode;
2227 ma->reqid = um->reqid;
2228
2229 ma->old_family = um->old_family;
2230 ma->new_family = um->new_family;
2231 }
2232
2233 *num = i;
2234 return 0;
2235 }
2236
2237 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2238 struct nlattr **attrs)
2239 {
2240 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2241 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2242 struct xfrm_kmaddress km, *kmp;
2243 u8 type;
2244 int err;
2245 int n = 0;
2246 struct net *net = sock_net(skb->sk);
2247 struct xfrm_encap_tmpl *encap = NULL;
2248
2249 if (attrs[XFRMA_MIGRATE] == NULL)
2250 return -EINVAL;
2251
2252 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2253
2254 err = copy_from_user_policy_type(&type, attrs);
2255 if (err)
2256 return err;
2257
2258 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2259 if (err)
2260 return err;
2261
2262 if (!n)
2263 return 0;
2264
2265 if (attrs[XFRMA_ENCAP]) {
2266 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2267 sizeof(*encap), GFP_KERNEL);
2268 if (!encap)
2269 return 0;
2270 }
2271
2272 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2273
2274 kfree(encap);
2275
2276 return err;
2277 }
2278 #else
2279 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2280 struct nlattr **attrs)
2281 {
2282 return -ENOPROTOOPT;
2283 }
2284 #endif
2285
2286 #ifdef CONFIG_XFRM_MIGRATE
2287 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2288 {
2289 struct xfrm_user_migrate um;
2290
2291 memset(&um, 0, sizeof(um));
2292 um.proto = m->proto;
2293 um.mode = m->mode;
2294 um.reqid = m->reqid;
2295 um.old_family = m->old_family;
2296 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2297 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2298 um.new_family = m->new_family;
2299 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2300 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2301
2302 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2303 }
2304
2305 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2306 {
2307 struct xfrm_user_kmaddress uk;
2308
2309 memset(&uk, 0, sizeof(uk));
2310 uk.family = k->family;
2311 uk.reserved = k->reserved;
2312 memcpy(&uk.local, &k->local, sizeof(uk.local));
2313 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2314
2315 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2316 }
2317
2318 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma,
2319 int with_encp)
2320 {
2321 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2322 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2323 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2324 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2325 + userpolicy_type_attrsize();
2326 }
2327
2328 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2329 int num_migrate, const struct xfrm_kmaddress *k,
2330 const struct xfrm_selector *sel,
2331 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2332 {
2333 const struct xfrm_migrate *mp;
2334 struct xfrm_userpolicy_id *pol_id;
2335 struct nlmsghdr *nlh;
2336 int i, err;
2337
2338 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2339 if (nlh == NULL)
2340 return -EMSGSIZE;
2341
2342 pol_id = nlmsg_data(nlh);
2343 /* copy data from selector, dir, and type to the pol_id */
2344 memset(pol_id, 0, sizeof(*pol_id));
2345 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2346 pol_id->dir = dir;
2347
2348 if (k != NULL) {
2349 err = copy_to_user_kmaddress(k, skb);
2350 if (err)
2351 goto out_cancel;
2352 }
2353 if (encap) {
2354 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2355 if (err)
2356 goto out_cancel;
2357 }
2358 err = copy_to_user_policy_type(type, skb);
2359 if (err)
2360 goto out_cancel;
2361 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2362 err = copy_to_user_migrate(mp, skb);
2363 if (err)
2364 goto out_cancel;
2365 }
2366
2367 nlmsg_end(skb, nlh);
2368 return 0;
2369
2370 out_cancel:
2371 nlmsg_cancel(skb, nlh);
2372 return err;
2373 }
2374
2375 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2376 const struct xfrm_migrate *m, int num_migrate,
2377 const struct xfrm_kmaddress *k,
2378 const struct xfrm_encap_tmpl *encap)
2379 {
2380 struct net *net = &init_net;
2381 struct sk_buff *skb;
2382
2383 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2384 GFP_ATOMIC);
2385 if (skb == NULL)
2386 return -ENOMEM;
2387
2388 /* build migrate */
2389 if (build_migrate(skb, m, num_migrate, k, sel, encap, dir, type) < 0)
2390 BUG();
2391
2392 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2393 }
2394 #else
2395 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2396 const struct xfrm_migrate *m, int num_migrate,
2397 const struct xfrm_kmaddress *k,
2398 const struct xfrm_encap_tmpl *encap)
2399 {
2400 return -ENOPROTOOPT;
2401 }
2402 #endif
2403
2404 #define XMSGSIZE(type) sizeof(struct type)
2405
2406 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2407 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2408 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2409 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2410 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2411 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2412 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2413 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2414 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2415 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2416 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2417 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2418 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2419 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2420 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2421 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2422 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2423 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2424 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2425 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2426 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2427 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2428 };
2429
2430 #undef XMSGSIZE
2431
2432 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2433 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2434 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2435 [XFRMA_LASTUSED] = { .type = NLA_U64},
2436 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2437 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2438 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2439 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2440 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2441 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2442 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2443 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2444 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2445 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2446 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2447 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2448 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2449 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2450 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2451 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2452 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2453 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2454 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2455 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2456 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2457 [XFRMA_PROTO] = { .type = NLA_U8 },
2458 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2459 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2460 };
2461
2462 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2463 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2464 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2465 };
2466
2467 static const struct xfrm_link {
2468 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2469 int (*dump)(struct sk_buff *, struct netlink_callback *);
2470 int (*done)(struct netlink_callback *);
2471 const struct nla_policy *nla_pol;
2472 int nla_max;
2473 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2474 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2475 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2476 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2477 .dump = xfrm_dump_sa,
2478 .done = xfrm_dump_sa_done },
2479 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2480 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2481 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2482 .dump = xfrm_dump_policy,
2483 .done = xfrm_dump_policy_done },
2484 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2485 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2486 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2487 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2488 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2489 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2490 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2491 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2492 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2493 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2494 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2495 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2496 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2497 .nla_pol = xfrma_spd_policy,
2498 .nla_max = XFRMA_SPD_MAX },
2499 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2500 };
2501
2502 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2503 struct netlink_ext_ack *extack)
2504 {
2505 struct net *net = sock_net(skb->sk);
2506 struct nlattr *attrs[XFRMA_MAX+1];
2507 const struct xfrm_link *link;
2508 int type, err;
2509
2510 #ifdef CONFIG_COMPAT
2511 if (in_compat_syscall())
2512 return -EOPNOTSUPP;
2513 #endif
2514
2515 type = nlh->nlmsg_type;
2516 if (type > XFRM_MSG_MAX)
2517 return -EINVAL;
2518
2519 type -= XFRM_MSG_BASE;
2520 link = &xfrm_dispatch[type];
2521
2522 /* All operations require privileges, even GET */
2523 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2524 return -EPERM;
2525
2526 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2527 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2528 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2529 if (link->dump == NULL)
2530 return -EINVAL;
2531
2532 {
2533 struct netlink_dump_control c = {
2534 .dump = link->dump,
2535 .done = link->done,
2536 };
2537 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2538 }
2539 }
2540
2541 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2542 link->nla_max ? : XFRMA_MAX,
2543 link->nla_pol ? : xfrma_policy, extack);
2544 if (err < 0)
2545 return err;
2546
2547 if (link->doit == NULL)
2548 return -EINVAL;
2549
2550 return link->doit(skb, nlh, attrs);
2551 }
2552
2553 static void xfrm_netlink_rcv(struct sk_buff *skb)
2554 {
2555 struct net *net = sock_net(skb->sk);
2556
2557 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2558 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2559 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2560 }
2561
2562 static inline size_t xfrm_expire_msgsize(void)
2563 {
2564 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2565 + nla_total_size(sizeof(struct xfrm_mark));
2566 }
2567
2568 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2569 {
2570 struct xfrm_user_expire *ue;
2571 struct nlmsghdr *nlh;
2572 int err;
2573
2574 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2575 if (nlh == NULL)
2576 return -EMSGSIZE;
2577
2578 ue = nlmsg_data(nlh);
2579 copy_to_user_state(x, &ue->state);
2580 ue->hard = (c->data.hard != 0) ? 1 : 0;
2581
2582 err = xfrm_mark_put(skb, &x->mark);
2583 if (err)
2584 return err;
2585
2586 nlmsg_end(skb, nlh);
2587 return 0;
2588 }
2589
2590 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2591 {
2592 struct net *net = xs_net(x);
2593 struct sk_buff *skb;
2594
2595 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2596 if (skb == NULL)
2597 return -ENOMEM;
2598
2599 if (build_expire(skb, x, c) < 0) {
2600 kfree_skb(skb);
2601 return -EMSGSIZE;
2602 }
2603
2604 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2605 }
2606
2607 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2608 {
2609 struct net *net = xs_net(x);
2610 struct sk_buff *skb;
2611
2612 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2613 if (skb == NULL)
2614 return -ENOMEM;
2615
2616 if (build_aevent(skb, x, c) < 0)
2617 BUG();
2618
2619 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2620 }
2621
2622 static int xfrm_notify_sa_flush(const struct km_event *c)
2623 {
2624 struct net *net = c->net;
2625 struct xfrm_usersa_flush *p;
2626 struct nlmsghdr *nlh;
2627 struct sk_buff *skb;
2628 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2629
2630 skb = nlmsg_new(len, GFP_ATOMIC);
2631 if (skb == NULL)
2632 return -ENOMEM;
2633
2634 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2635 if (nlh == NULL) {
2636 kfree_skb(skb);
2637 return -EMSGSIZE;
2638 }
2639
2640 p = nlmsg_data(nlh);
2641 p->proto = c->data.proto;
2642
2643 nlmsg_end(skb, nlh);
2644
2645 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2646 }
2647
2648 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2649 {
2650 size_t l = 0;
2651 if (x->aead)
2652 l += nla_total_size(aead_len(x->aead));
2653 if (x->aalg) {
2654 l += nla_total_size(sizeof(struct xfrm_algo) +
2655 (x->aalg->alg_key_len + 7) / 8);
2656 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2657 }
2658 if (x->ealg)
2659 l += nla_total_size(xfrm_alg_len(x->ealg));
2660 if (x->calg)
2661 l += nla_total_size(sizeof(*x->calg));
2662 if (x->encap)
2663 l += nla_total_size(sizeof(*x->encap));
2664 if (x->tfcpad)
2665 l += nla_total_size(sizeof(x->tfcpad));
2666 if (x->replay_esn)
2667 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2668 else
2669 l += nla_total_size(sizeof(struct xfrm_replay_state));
2670 if (x->security)
2671 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2672 x->security->ctx_len);
2673 if (x->coaddr)
2674 l += nla_total_size(sizeof(*x->coaddr));
2675 if (x->props.extra_flags)
2676 l += nla_total_size(sizeof(x->props.extra_flags));
2677 if (x->xso.dev)
2678 l += nla_total_size(sizeof(x->xso));
2679
2680 /* Must count x->lastused as it may become non-zero behind our back. */
2681 l += nla_total_size_64bit(sizeof(u64));
2682
2683 return l;
2684 }
2685
2686 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2687 {
2688 struct net *net = xs_net(x);
2689 struct xfrm_usersa_info *p;
2690 struct xfrm_usersa_id *id;
2691 struct nlmsghdr *nlh;
2692 struct sk_buff *skb;
2693 int len = xfrm_sa_len(x);
2694 int headlen, err;
2695
2696 headlen = sizeof(*p);
2697 if (c->event == XFRM_MSG_DELSA) {
2698 len += nla_total_size(headlen);
2699 headlen = sizeof(*id);
2700 len += nla_total_size(sizeof(struct xfrm_mark));
2701 }
2702 len += NLMSG_ALIGN(headlen);
2703
2704 skb = nlmsg_new(len, GFP_ATOMIC);
2705 if (skb == NULL)
2706 return -ENOMEM;
2707
2708 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2709 err = -EMSGSIZE;
2710 if (nlh == NULL)
2711 goto out_free_skb;
2712
2713 p = nlmsg_data(nlh);
2714 if (c->event == XFRM_MSG_DELSA) {
2715 struct nlattr *attr;
2716
2717 id = nlmsg_data(nlh);
2718 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2719 id->spi = x->id.spi;
2720 id->family = x->props.family;
2721 id->proto = x->id.proto;
2722
2723 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2724 err = -EMSGSIZE;
2725 if (attr == NULL)
2726 goto out_free_skb;
2727
2728 p = nla_data(attr);
2729 }
2730 err = copy_to_user_state_extra(x, p, skb);
2731 if (err)
2732 goto out_free_skb;
2733
2734 nlmsg_end(skb, nlh);
2735
2736 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2737
2738 out_free_skb:
2739 kfree_skb(skb);
2740 return err;
2741 }
2742
2743 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2744 {
2745
2746 switch (c->event) {
2747 case XFRM_MSG_EXPIRE:
2748 return xfrm_exp_state_notify(x, c);
2749 case XFRM_MSG_NEWAE:
2750 return xfrm_aevent_state_notify(x, c);
2751 case XFRM_MSG_DELSA:
2752 case XFRM_MSG_UPDSA:
2753 case XFRM_MSG_NEWSA:
2754 return xfrm_notify_sa(x, c);
2755 case XFRM_MSG_FLUSHSA:
2756 return xfrm_notify_sa_flush(c);
2757 default:
2758 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2759 c->event);
2760 break;
2761 }
2762
2763 return 0;
2764
2765 }
2766
2767 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2768 struct xfrm_policy *xp)
2769 {
2770 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2771 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2772 + nla_total_size(sizeof(struct xfrm_mark))
2773 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2774 + userpolicy_type_attrsize();
2775 }
2776
2777 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2778 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2779 {
2780 __u32 seq = xfrm_get_acqseq();
2781 struct xfrm_user_acquire *ua;
2782 struct nlmsghdr *nlh;
2783 int err;
2784
2785 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2786 if (nlh == NULL)
2787 return -EMSGSIZE;
2788
2789 ua = nlmsg_data(nlh);
2790 memcpy(&ua->id, &x->id, sizeof(ua->id));
2791 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2792 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2793 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2794 ua->aalgos = xt->aalgos;
2795 ua->ealgos = xt->ealgos;
2796 ua->calgos = xt->calgos;
2797 ua->seq = x->km.seq = seq;
2798
2799 err = copy_to_user_tmpl(xp, skb);
2800 if (!err)
2801 err = copy_to_user_state_sec_ctx(x, skb);
2802 if (!err)
2803 err = copy_to_user_policy_type(xp->type, skb);
2804 if (!err)
2805 err = xfrm_mark_put(skb, &xp->mark);
2806 if (err) {
2807 nlmsg_cancel(skb, nlh);
2808 return err;
2809 }
2810
2811 nlmsg_end(skb, nlh);
2812 return 0;
2813 }
2814
2815 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2816 struct xfrm_policy *xp)
2817 {
2818 struct net *net = xs_net(x);
2819 struct sk_buff *skb;
2820
2821 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2822 if (skb == NULL)
2823 return -ENOMEM;
2824
2825 if (build_acquire(skb, x, xt, xp) < 0)
2826 BUG();
2827
2828 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2829 }
2830
2831 /* User gives us xfrm_user_policy_info followed by an array of 0
2832 * or more templates.
2833 */
2834 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2835 u8 *data, int len, int *dir)
2836 {
2837 struct net *net = sock_net(sk);
2838 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2839 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2840 struct xfrm_policy *xp;
2841 int nr;
2842
2843 switch (sk->sk_family) {
2844 case AF_INET:
2845 if (opt != IP_XFRM_POLICY) {
2846 *dir = -EOPNOTSUPP;
2847 return NULL;
2848 }
2849 break;
2850 #if IS_ENABLED(CONFIG_IPV6)
2851 case AF_INET6:
2852 if (opt != IPV6_XFRM_POLICY) {
2853 *dir = -EOPNOTSUPP;
2854 return NULL;
2855 }
2856 break;
2857 #endif
2858 default:
2859 *dir = -EINVAL;
2860 return NULL;
2861 }
2862
2863 *dir = -EINVAL;
2864
2865 if (len < sizeof(*p) ||
2866 verify_newpolicy_info(p))
2867 return NULL;
2868
2869 nr = ((len - sizeof(*p)) / sizeof(*ut));
2870 if (validate_tmpl(nr, ut, p->sel.family))
2871 return NULL;
2872
2873 if (p->dir > XFRM_POLICY_OUT)
2874 return NULL;
2875
2876 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2877 if (xp == NULL) {
2878 *dir = -ENOBUFS;
2879 return NULL;
2880 }
2881
2882 copy_from_user_policy(xp, p);
2883 xp->type = XFRM_POLICY_TYPE_MAIN;
2884 copy_templates(xp, ut, nr);
2885
2886 *dir = p->dir;
2887
2888 return xp;
2889 }
2890
2891 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2892 {
2893 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2894 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2895 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2896 + nla_total_size(sizeof(struct xfrm_mark))
2897 + userpolicy_type_attrsize();
2898 }
2899
2900 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2901 int dir, const struct km_event *c)
2902 {
2903 struct xfrm_user_polexpire *upe;
2904 int hard = c->data.hard;
2905 struct nlmsghdr *nlh;
2906 int err;
2907
2908 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2909 if (nlh == NULL)
2910 return -EMSGSIZE;
2911
2912 upe = nlmsg_data(nlh);
2913 copy_to_user_policy(xp, &upe->pol, dir);
2914 err = copy_to_user_tmpl(xp, skb);
2915 if (!err)
2916 err = copy_to_user_sec_ctx(xp, skb);
2917 if (!err)
2918 err = copy_to_user_policy_type(xp->type, skb);
2919 if (!err)
2920 err = xfrm_mark_put(skb, &xp->mark);
2921 if (err) {
2922 nlmsg_cancel(skb, nlh);
2923 return err;
2924 }
2925 upe->hard = !!hard;
2926
2927 nlmsg_end(skb, nlh);
2928 return 0;
2929 }
2930
2931 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2932 {
2933 struct net *net = xp_net(xp);
2934 struct sk_buff *skb;
2935
2936 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2937 if (skb == NULL)
2938 return -ENOMEM;
2939
2940 if (build_polexpire(skb, xp, dir, c) < 0)
2941 BUG();
2942
2943 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2944 }
2945
2946 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2947 {
2948 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2949 struct net *net = xp_net(xp);
2950 struct xfrm_userpolicy_info *p;
2951 struct xfrm_userpolicy_id *id;
2952 struct nlmsghdr *nlh;
2953 struct sk_buff *skb;
2954 int headlen, err;
2955
2956 headlen = sizeof(*p);
2957 if (c->event == XFRM_MSG_DELPOLICY) {
2958 len += nla_total_size(headlen);
2959 headlen = sizeof(*id);
2960 }
2961 len += userpolicy_type_attrsize();
2962 len += nla_total_size(sizeof(struct xfrm_mark));
2963 len += NLMSG_ALIGN(headlen);
2964
2965 skb = nlmsg_new(len, GFP_ATOMIC);
2966 if (skb == NULL)
2967 return -ENOMEM;
2968
2969 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2970 err = -EMSGSIZE;
2971 if (nlh == NULL)
2972 goto out_free_skb;
2973
2974 p = nlmsg_data(nlh);
2975 if (c->event == XFRM_MSG_DELPOLICY) {
2976 struct nlattr *attr;
2977
2978 id = nlmsg_data(nlh);
2979 memset(id, 0, sizeof(*id));
2980 id->dir = dir;
2981 if (c->data.byid)
2982 id->index = xp->index;
2983 else
2984 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2985
2986 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2987 err = -EMSGSIZE;
2988 if (attr == NULL)
2989 goto out_free_skb;
2990
2991 p = nla_data(attr);
2992 }
2993
2994 copy_to_user_policy(xp, p, dir);
2995 err = copy_to_user_tmpl(xp, skb);
2996 if (!err)
2997 err = copy_to_user_policy_type(xp->type, skb);
2998 if (!err)
2999 err = xfrm_mark_put(skb, &xp->mark);
3000 if (err)
3001 goto out_free_skb;
3002
3003 nlmsg_end(skb, nlh);
3004
3005 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3006
3007 out_free_skb:
3008 kfree_skb(skb);
3009 return err;
3010 }
3011
3012 static int xfrm_notify_policy_flush(const struct km_event *c)
3013 {
3014 struct net *net = c->net;
3015 struct nlmsghdr *nlh;
3016 struct sk_buff *skb;
3017 int err;
3018
3019 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3020 if (skb == NULL)
3021 return -ENOMEM;
3022
3023 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3024 err = -EMSGSIZE;
3025 if (nlh == NULL)
3026 goto out_free_skb;
3027 err = copy_to_user_policy_type(c->data.type, skb);
3028 if (err)
3029 goto out_free_skb;
3030
3031 nlmsg_end(skb, nlh);
3032
3033 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3034
3035 out_free_skb:
3036 kfree_skb(skb);
3037 return err;
3038 }
3039
3040 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3041 {
3042
3043 switch (c->event) {
3044 case XFRM_MSG_NEWPOLICY:
3045 case XFRM_MSG_UPDPOLICY:
3046 case XFRM_MSG_DELPOLICY:
3047 return xfrm_notify_policy(xp, dir, c);
3048 case XFRM_MSG_FLUSHPOLICY:
3049 return xfrm_notify_policy_flush(c);
3050 case XFRM_MSG_POLEXPIRE:
3051 return xfrm_exp_policy_notify(xp, dir, c);
3052 default:
3053 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3054 c->event);
3055 }
3056
3057 return 0;
3058
3059 }
3060
3061 static inline size_t xfrm_report_msgsize(void)
3062 {
3063 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3064 }
3065
3066 static int build_report(struct sk_buff *skb, u8 proto,
3067 struct xfrm_selector *sel, xfrm_address_t *addr)
3068 {
3069 struct xfrm_user_report *ur;
3070 struct nlmsghdr *nlh;
3071
3072 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3073 if (nlh == NULL)
3074 return -EMSGSIZE;
3075
3076 ur = nlmsg_data(nlh);
3077 ur->proto = proto;
3078 memcpy(&ur->sel, sel, sizeof(ur->sel));
3079
3080 if (addr) {
3081 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3082 if (err) {
3083 nlmsg_cancel(skb, nlh);
3084 return err;
3085 }
3086 }
3087 nlmsg_end(skb, nlh);
3088 return 0;
3089 }
3090
3091 static int xfrm_send_report(struct net *net, u8 proto,
3092 struct xfrm_selector *sel, xfrm_address_t *addr)
3093 {
3094 struct sk_buff *skb;
3095
3096 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3097 if (skb == NULL)
3098 return -ENOMEM;
3099
3100 if (build_report(skb, proto, sel, addr) < 0)
3101 BUG();
3102
3103 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3104 }
3105
3106 static inline size_t xfrm_mapping_msgsize(void)
3107 {
3108 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3109 }
3110
3111 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3112 xfrm_address_t *new_saddr, __be16 new_sport)
3113 {
3114 struct xfrm_user_mapping *um;
3115 struct nlmsghdr *nlh;
3116
3117 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3118 if (nlh == NULL)
3119 return -EMSGSIZE;
3120
3121 um = nlmsg_data(nlh);
3122
3123 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3124 um->id.spi = x->id.spi;
3125 um->id.family = x->props.family;
3126 um->id.proto = x->id.proto;
3127 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3128 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3129 um->new_sport = new_sport;
3130 um->old_sport = x->encap->encap_sport;
3131 um->reqid = x->props.reqid;
3132
3133 nlmsg_end(skb, nlh);
3134 return 0;
3135 }
3136
3137 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3138 __be16 sport)
3139 {
3140 struct net *net = xs_net(x);
3141 struct sk_buff *skb;
3142
3143 if (x->id.proto != IPPROTO_ESP)
3144 return -EINVAL;
3145
3146 if (!x->encap)
3147 return -EINVAL;
3148
3149 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3150 if (skb == NULL)
3151 return -ENOMEM;
3152
3153 if (build_mapping(skb, x, ipaddr, sport) < 0)
3154 BUG();
3155
3156 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3157 }
3158
3159 static bool xfrm_is_alive(const struct km_event *c)
3160 {
3161 return (bool)xfrm_acquire_is_on(c->net);
3162 }
3163
3164 static struct xfrm_mgr netlink_mgr = {
3165 .notify = xfrm_send_state_notify,
3166 .acquire = xfrm_send_acquire,
3167 .compile_policy = xfrm_compile_policy,
3168 .notify_policy = xfrm_send_policy_notify,
3169 .report = xfrm_send_report,
3170 .migrate = xfrm_send_migrate,
3171 .new_mapping = xfrm_send_mapping,
3172 .is_alive = xfrm_is_alive,
3173 };
3174
3175 static int __net_init xfrm_user_net_init(struct net *net)
3176 {
3177 struct sock *nlsk;
3178 struct netlink_kernel_cfg cfg = {
3179 .groups = XFRMNLGRP_MAX,
3180 .input = xfrm_netlink_rcv,
3181 };
3182
3183 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3184 if (nlsk == NULL)
3185 return -ENOMEM;
3186 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3187 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3188 return 0;
3189 }
3190
3191 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3192 {
3193 struct net *net;
3194 list_for_each_entry(net, net_exit_list, exit_list)
3195 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3196 synchronize_net();
3197 list_for_each_entry(net, net_exit_list, exit_list)
3198 netlink_kernel_release(net->xfrm.nlsk_stash);
3199 }
3200
3201 static struct pernet_operations xfrm_user_net_ops = {
3202 .init = xfrm_user_net_init,
3203 .exit_batch = xfrm_user_net_exit,
3204 };
3205
3206 static int __init xfrm_user_init(void)
3207 {
3208 int rv;
3209
3210 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3211
3212 rv = register_pernet_subsys(&xfrm_user_net_ops);
3213 if (rv < 0)
3214 return rv;
3215 rv = xfrm_register_km(&netlink_mgr);
3216 if (rv < 0)
3217 unregister_pernet_subsys(&xfrm_user_net_ops);
3218 return rv;
3219 }
3220
3221 static void __exit xfrm_user_exit(void)
3222 {
3223 xfrm_unregister_km(&netlink_mgr);
3224 unregister_pernet_subsys(&xfrm_user_net_ops);
3225 }
3226
3227 module_init(xfrm_user_init);
3228 module_exit(xfrm_user_exit);
3229 MODULE_LICENSE("GPL");
3230 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
3231
Linux with added FPC-III support