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Merge tag 'wberr-v4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton...
[linux-2.6-block.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 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
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 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>
1da177e4
LT		 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>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
7c0f6ba6 30#include <linux/uaccess.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
e33d4f13 34#include <asm/unaligned.h>
1da177e4 35
5424f32e 36static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 37{
5424f32e 38 struct nlattr *rt = attrs[type];
1da177e4
LT		 39 struct xfrm_algo *algp;
40
41 if (!rt)
42 return 0;
43
5424f32e 44 algp = nla_data(rt);
0f99be0d 45 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 46 return -EINVAL;
47
1da177e4
LT		 48 switch (type) {
49 case XFRMA_ALG_AUTH:
1da177e4 50 case XFRMA_ALG_CRYPT:
1da177e4 51 case XFRMA_ALG_COMP:
1da177e4
LT		 52 break;
53
54 default:
55 return -EINVAL;
3ff50b79 56 }
1da177e4 57
633439f5 58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1da177e4
LT		 59 return 0;
60}
61
4447bb33
MW		 62static 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
633439f5 74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
4447bb33
MW		 75 return 0;
76}
77
1a6509d9
HX		 78static 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
633439f5 90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1a6509d9
HX		 91 return 0;
92}
93
5424f32e 94static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 95 xfrm_address_t **addrp)
96{
5424f32e 97 struct nlattr *rt = attrs[type];
eb2971b6 98
cf5cb79f 99 if (rt && addrp)
5424f32e 100 *addrp = nla_data(rt);
eb2971b6 101}
df71837d 102
5424f32e 103static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 104{
5424f32e 105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 106 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 107
108 if (!rt)
109 return 0;
110
5424f32e 111 uctx = nla_data(rt);
cf5cb79f 112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 113 return -EINVAL;
114
115 return 0;
116}
117
d8647b79
SK		 118static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
120{
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 122 struct xfrm_replay_state_esn *rs;
d8647b79 123
ecd79187
MK		 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 }
7833aa05 137
d8647b79
SK		 138 if (!rt)
139 return 0;
140
01714109
FD		 141 /* As only ESP and AH support ESN feature. */
142 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 143 return -EINVAL;
144
d8647b79
SK		 145 if (p->replay_window != 0)
146 return -EINVAL;
147
148 return 0;
149}
df71837d 150
1da177e4 151static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 152 struct nlattr **attrs)
1da177e4
LT		 153{
154 int err;
155
156 err = -EINVAL;
157 switch (p->family) {
158 case AF_INET:
159 break;
160
161 case AF_INET6:
dfd56b8b 162#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 163 break;
164#else
165 err = -EAFNOSUPPORT;
166 goto out;
167#endif
168
169 default:
170 goto out;
3ff50b79 171 }
1da177e4
LT		 172
173 err = -EINVAL;
174 switch (p->id.proto) {
175 case IPPROTO_AH:
4447bb33
MW		 176 if ((!attrs[XFRMA_ALG_AUTH] &&
177 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 178 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 179 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 180 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 181 attrs[XFRMA_TFCPAD])
1da177e4
LT		 182 goto out;
183 break;
184
185 case IPPROTO_ESP:
1a6509d9
HX		 186 if (attrs[XFRMA_ALG_COMP])
187 goto out;
188 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
192 goto out;
193 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
1da177e4 197 goto out;
35d2856b
MW		 198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
200 goto out;
1da177e4
LT		 201 break;
202
203 case IPPROTO_COMP:
35a7aa08 204 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 205 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 206 attrs[XFRMA_ALG_AUTH] ||
4447bb33 207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 208 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 209 attrs[XFRMA_TFCPAD] ||
210 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 211 goto out;
212 break;
213
dfd56b8b 214#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
35a7aa08
TG		 217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
4447bb33 219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 220 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
35d2856b 224 attrs[XFRMA_TFCPAD] ||
35a7aa08 225 !attrs[XFRMA_COADDR])
e23c7194
MN		 226 goto out;
227 break;
228#endif
229
1da177e4
LT		 230 default:
231 goto out;
3ff50b79 232 }
1da177e4 233
1a6509d9
HX		 234 if ((err = verify_aead(attrs)))
235 goto out;
4447bb33
MW		 236 if ((err = verify_auth_trunc(attrs)))
237 goto out;
35a7aa08 238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 239 goto out;
35a7aa08 240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 241 goto out;
35a7aa08 242 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 243 goto out;
35a7aa08 244 if ((err = verify_sec_ctx_len(attrs)))
df71837d 245 goto out;
d8647b79
SK		 246 if ((err = verify_replay(p, attrs)))
247 goto out;
1da177e4
LT		 248
249 err = -EINVAL;
250 switch (p->mode) {
7e49e6de
MN		 251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
060f02a3 253 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 254 case XFRM_MODE_BEET:
1da177e4
LT		 255 break;
256
257 default:
258 goto out;
3ff50b79 259 }
1da177e4
LT		 260
261 err = 0;
262
263out:
264 return err;
265}
266
267static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 269 struct nlattr *rta)
1da177e4 270{
1da177e4
LT		 271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
273
274 if (!rta)
275 return 0;
276
5424f32e 277 ualg = nla_data(rta);
1da177e4
LT		 278
279 algo = get_byname(ualg->alg_name, 1);
280 if (!algo)
281 return -ENOSYS;
282 *props = algo->desc.sadb_alg_id;
283
0f99be0d 284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 285 if (!p)
286 return -ENOMEM;
287
04ff1260 288 strcpy(p->alg_name, algo->name);
1da177e4
LT		 289 *algpp = p;
290 return 0;
291}
292
69b0137f
HX		 293static 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
4447bb33
MW		 318static 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
348static 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;
689f1c9d 362 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 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
69b0137f 378static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 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;
69b0137f 391 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 392
393 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
394 if (!p)
395 return -ENOMEM;
396
397 strcpy(p->alg_name, algo->name);
69b0137f
HX		 398 x->aead = p;
399 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 400 return 0;
401}
402
e2b19125
SK		 403static 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;
ecd79187 407 int ulen;
e2b19125
SK		 408
409 if (!replay_esn || !rp)
410 return 0;
411
412 up = nla_data(rp);
ecd79187 413 ulen = xfrm_replay_state_esn_len(up);
e2b19125 414
f843ee6d
AW		 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)
e2b19125
SK		 420 return -EINVAL;
421
677e806d
AW		 422 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
423 return -EINVAL;
424
e2b19125
SK		 425 return 0;
426}
427
d8647b79
SK		 428static 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;
ecd79187 433 int klen, ulen;
d8647b79
SK		 434
435 if (!rta)
436 return 0;
437
438 up = nla_data(rta);
ecd79187
MK		 439 klen = xfrm_replay_state_esn_len(up);
440 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 441
ecd79187 442 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 443 if (!p)
444 return -ENOMEM;
445
ecd79187 446 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 447 if (!pp) {
448 kfree(p);
449 return -ENOMEM;
450 }
451
ecd79187
MK		 452 memcpy(p, up, ulen);
453 memcpy(pp, up, ulen);
454
d8647b79
SK		 455 *replay_esn = p;
456 *preplay_esn = pp;
457
458 return 0;
459}
460
661697f7 461static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 462{
df71837d
TJ		 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
1da177e4
LT		 472static 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;
33fce60d
FD		 478 x->props.replay_window = min_t(unsigned int, p->replay_window,
479 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 480 x->props.reqid = p->reqid;
481 x->props.family = p->family;
54489c14 482 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 483 x->props.flags = p->flags;
196b0036 484
ccf9b3b8 485 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 486 x->sel.family = p->family;
1da177e4
LT		 487}
488
d51d081d
JHS		 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*/
e3ac104d
MK		 494static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
495 int update_esn)
d51d081d 496{
5424f32e 497 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 498 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 499 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
500 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
501 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 502
d8647b79
SK		 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
d51d081d
JHS		 512 if (rp) {
513 struct xfrm_replay_state *replay;
5424f32e 514 replay = nla_data(rp);
d51d081d
JHS		 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;
5424f32e 521 ltime = nla_data(lt);
d51d081d
JHS		 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
cf5cb79f 528 if (et)
5424f32e 529 x->replay_maxage = nla_get_u32(et);
d51d081d 530
cf5cb79f 531 if (rt)
5424f32e 532 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 533}
534
fc34acd3
AD		 535static struct xfrm_state *xfrm_state_construct(struct net *net,
536 struct xfrm_usersa_info *p,
5424f32e 537 struct nlattr **attrs,
1da177e4
LT		 538 int *errp)
539{
fc34acd3 540 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 541 int err = -ENOMEM;
542
543 if (!x)
544 goto error_no_put;
545
546 copy_from_user_state(x, p);
547
a947b0a9
ND		 548 if (attrs[XFRMA_SA_EXTRA_FLAGS])
549 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
550
69b0137f 551 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 552 goto error;
4447bb33
MW		 553 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
554 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 555 goto error;
4447bb33
MW		 556 if (!x->props.aalgo) {
557 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
558 attrs[XFRMA_ALG_AUTH])))
559 goto error;
560 }
69b0137f 561 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 562 goto error;
563 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
564 xfrm_calg_get_byname,
35a7aa08 565 attrs[XFRMA_ALG_COMP])))
1da177e4 566 goto error;
fd21150a
TG		 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
35d2856b
MW		 575 if (attrs[XFRMA_TFCPAD])
576 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
577
fd21150a
TG		 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
6f26b61e
JHS		 585 xfrm_mark_get(attrs, &x->mark);
586
a454f0cc 587 err = __xfrm_init_state(x, false);
1da177e4
LT		 588 if (err)
589 goto error;
590
2f30ea50
MK		 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 }
df71837d 597
152afb9b
IT		 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 }
d77e38e6 604
d8647b79
SK		 605 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
606 attrs[XFRMA_REPLAY_ESN_VAL])))
607 goto error;
608
1da177e4 609 x->km.seq = p->seq;
b27aeadb 610 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 611 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 612 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 613
9fdc4883
SK		 614 if ((err = xfrm_init_replay(x)))
615 goto error;
d51d081d 616
9fdc4883 617 /* override default values from above */
e3ac104d 618 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 619
620 return x;
621
622error:
623 x->km.state = XFRM_STATE_DEAD;
624 xfrm_state_put(x);
625error_no_put:
626 *errp = err;
627 return NULL;
628}
629
22e70050 630static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 631 struct nlattr **attrs)
1da177e4 632{
fc34acd3 633 struct net *net = sock_net(skb->sk);
7b67c857 634 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 635 struct xfrm_state *x;
636 int err;
26b15dad 637 struct km_event c;
1da177e4 638
35a7aa08 639 err = verify_newsa_info(p, attrs);
1da177e4
LT		 640 if (err)
641 return err;
642
fc34acd3 643 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 644 if (!x)
645 return err;
646
26b15dad 647 xfrm_state_hold(x);
1da177e4
LT		 648 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
649 err = xfrm_state_add(x);
650 else
651 err = xfrm_state_update(x);
652
2e71029e 653 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 654
1da177e4
LT		 655 if (err < 0) {
656 x->km.state = XFRM_STATE_DEAD;
21380b81 657 __xfrm_state_put(x);
7d6dfe1f 658 goto out;
1da177e4
LT		 659 }
660
26b15dad 661 c.seq = nlh->nlmsg_seq;
15e47304 662 c.portid = nlh->nlmsg_pid;
f60f6b8f 663 c.event = nlh->nlmsg_type;
26b15dad
JHS		 664
665 km_state_notify(x, &c);
7d6dfe1f 666out:
26b15dad 667 xfrm_state_put(x);
1da177e4
LT		 668 return err;
669}
670
fc34acd3
AD		 671static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
672 struct xfrm_usersa_id *p,
5424f32e 673 struct nlattr **attrs,
eb2971b6
MN		 674 int *errp)
675{
676 struct xfrm_state *x = NULL;
6f26b61e 677 struct xfrm_mark m;
eb2971b6 678 int err;
6f26b61e 679 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 680
681 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
682 err = -ESRCH;
6f26b61e 683 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 684 } else {
685 xfrm_address_t *saddr = NULL;
686
35a7aa08 687 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 688 if (!saddr) {
689 err = -EINVAL;
690 goto out;
691 }
692
9abbffee 693 err = -ESRCH;
6f26b61e
JHS		 694 x = xfrm_state_lookup_byaddr(net, mark,
695 &p->daddr, saddr,
221df1ed 696 p->proto, p->family);
eb2971b6
MN		 697 }
698
699 out:
700 if (!x && errp)
701 *errp = err;
702 return x;
703}
704
22e70050 705static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 706 struct nlattr **attrs)
1da177e4 707{
fc34acd3 708 struct net *net = sock_net(skb->sk);
1da177e4 709 struct xfrm_state *x;
eb2971b6 710 int err = -ESRCH;
26b15dad 711 struct km_event c;
7b67c857 712 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 713
fc34acd3 714 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 715 if (x == NULL)
eb2971b6 716 return err;
1da177e4 717
6f68dc37 718 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 719 goto out;
720
1da177e4 721 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 722 err = -EPERM;
723 goto out;
1da177e4
LT		 724 }
725
26b15dad 726 err = xfrm_state_delete(x);
161a09e7 727
c8c05a8e
CZ		 728 if (err < 0)
729 goto out;
26b15dad
JHS		 730
731 c.seq = nlh->nlmsg_seq;
15e47304 732 c.portid = nlh->nlmsg_pid;
f60f6b8f 733 c.event = nlh->nlmsg_type;
26b15dad 734 km_state_notify(x, &c);
1da177e4 735
c8c05a8e 736out:
2e71029e 737 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 738 xfrm_state_put(x);
26b15dad 739 return err;
1da177e4
LT		 740}
741
742static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
743{
f778a636 744 memset(p, 0, sizeof(*p));
1da177e4
LT		 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));
e33d4f13
SV		 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);
54489c14 752 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 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
761struct xfrm_dump_info {
762 struct sk_buff *in_skb;
763 struct sk_buff *out_skb;
764 u32 nlmsg_seq;
765 u16 nlmsg_flags;
1da177e4
LT		 766};
767
c0144bea
TG		 768static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
769{
c0144bea
TG		 770 struct xfrm_user_sec_ctx *uctx;
771 struct nlattr *attr;
68325d3b 772 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 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
d77e38e6
SK		 789static 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);
5fe0d4bd 799 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 800 xuo->ifindex = xso->dev->ifindex;
801 xuo->flags = xso->flags;
802
803 return 0;
804}
805
4447bb33
MW		 806static 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);
4c87308b 817 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 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
68325d3b
HX		 824/* Don't change this without updating xfrm_sa_len! */
825static int copy_to_user_state_extra(struct xfrm_state *x,
826 struct xfrm_usersa_info *p,
827 struct sk_buff *skb)
1da177e4 828{
1d1e34dd 829 int ret = 0;
d0fde795 830
1d1e34dd 831 copy_to_user_state(x, p);
68325d3b 832
a947b0a9
ND		 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
1d1e34dd
DM		 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) {
de95c4a4
ND		 846 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
847 XFRMA_PAD);
1d1e34dd
DM		 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;
f293a5e3 887 if (x->replay_esn)
1d1e34dd
DM		 888 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
889 xfrm_replay_state_esn_len(x->replay_esn),
890 x->replay_esn);
f293a5e3 891 else
892 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
893 &x->replay);
894 if (ret)
895 goto out;
d77e38e6
SK		 896 if(x->xso.dev)
897 ret = copy_user_offload(&x->xso, skb);
898 if (ret)
899 goto out;
1d1e34dd
DM		 900 if (x->security)
901 ret = copy_sec_ctx(x->security, skb);
902out:
903 return ret;
68325d3b
HX		 904}
905
906static 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
15e47304 915 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 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);
1d1e34dd
DM		 923 if (err) {
924 nlmsg_cancel(skb, nlh);
925 return err;
926 }
9825069d 927 nlmsg_end(skb, nlh);
1da177e4 928 return 0;
1da177e4
LT		 929}
930
4c563f76
TT		 931static int xfrm_dump_sa_done(struct netlink_callback *cb)
932{
933 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 934 struct sock *sk = cb->skb->sk;
935 struct net *net = sock_net(sk);
936
1ba5bf99
VN		 937 if (cb->args[0])
938 xfrm_state_walk_done(walk, net);
4c563f76
TT		 939 return 0;
940}
941
d3623099 942static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 943static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
944{
fc34acd3 945 struct net *net = sock_net(skb->sk);
4c563f76 946 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 947 struct xfrm_dump_info info;
948
4c563f76
TT		 949 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
950 sizeof(cb->args) - sizeof(cb->args[0]));
951
1da177e4
LT		 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;
4c563f76
TT		 956
957 if (!cb->args[0]) {
d3623099 958 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 959 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 960 u8 proto = 0;
961 int err;
962
fceb6435
JB		 963 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
964 NULL);
d3623099
ND		 965 if (err < 0)
966 return err;
967
870a2df4 968 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 969 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
970 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 971 if (filter == NULL)
972 return -ENOMEM;
d3623099
ND		 973 }
974
975 if (attrs[XFRMA_PROTO])
976 proto = nla_get_u8(attrs[XFRMA_PROTO]);
977
978 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 979 cb->args[0] = 1;
4c563f76
TT		 980 }
981
fc34acd3 982 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 983
984 return skb->len;
985}
986
987static 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;
864745d2 992 int err;
1da177e4 993
7deb2264 994 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 995 if (!skb)
996 return ERR_PTR(-ENOMEM);
997
1da177e4
LT		 998 info.in_skb = in_skb;
999 info.out_skb = skb;
1000 info.nlmsg_seq = seq;
1001 info.nlmsg_flags = 0;
1da177e4 1002
864745d2
MK		 1003 err = dump_one_state(x, 0, &info);
1004 if (err) {
1da177e4 1005 kfree_skb(skb);
864745d2 1006 return ERR_PTR(err);
1da177e4
LT		 1007 }
1008
1009 return skb;
1010}
1011
21ee543e
MK		 1012/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1013 * Must be called with RCU read lock.
1014 */
1015static 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
7deb2264
TG		 1026static inline size_t xfrm_spdinfo_msgsize(void)
1027{
1028 return NLMSG_ALIGN(4)
1029 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1030 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1031 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1032 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1033}
1034
e071041b 1035static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1036 u32 portid, u32 seq, u32 flags)
ecfd6b18 1037{
5a6d3416
JHS		 1038 struct xfrmk_spdinfo si;
1039 struct xfrmu_spdinfo spc;
1040 struct xfrmu_spdhinfo sph;
880a6fab 1041 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1042 struct nlmsghdr *nlh;
1d1e34dd 1043 int err;
ecfd6b18 1044 u32 *f;
880a6fab 1045 unsigned lseq;
ecfd6b18 1046
15e47304 1047 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1048 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1049 return -EMSGSIZE;
1050
1051 f = nlmsg_data(nlh);
1052 *f = flags;
e071041b 1053 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 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
880a6fab
CG		 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
1d1e34dd
DM		 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);
880a6fab
CG		 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);
1d1e34dd
DM		 1079 if (err) {
1080 nlmsg_cancel(skb, nlh);
1081 return err;
1082 }
ecfd6b18 1083
053c095a
JB		 1084 nlmsg_end(skb, nlh);
1085 return 0;
ecfd6b18
JHS		 1086}
1087
880a6fab
CG		 1088static 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
ecfd6b18 1133static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1134 struct nlattr **attrs)
ecfd6b18 1135{
a6483b79 1136 struct net *net = sock_net(skb->sk);
ecfd6b18 1137 struct sk_buff *r_skb;
7b67c857 1138 u32 *flags = nlmsg_data(nlh);
15e47304 1139 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1140 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1141
7deb2264 1142 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1143 if (r_skb == NULL)
1144 return -ENOMEM;
1145
15e47304 1146 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1147 BUG();
1148
15e47304 1149 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1150}
1151
7deb2264
TG		 1152static 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
e071041b 1159static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1160 u32 portid, u32 seq, u32 flags)
28d8909b 1161{
af11e316
JHS		 1162 struct xfrmk_sadinfo si;
1163 struct xfrmu_sadhinfo sh;
28d8909b 1164 struct nlmsghdr *nlh;
1d1e34dd 1165 int err;
28d8909b
JHS		 1166 u32 *f;
1167
15e47304 1168 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1169 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1170 return -EMSGSIZE;
1171
1172 f = nlmsg_data(nlh);
1173 *f = flags;
e071041b 1174 xfrm_sad_getinfo(net, &si);
28d8909b 1175
af11e316
JHS		 1176 sh.sadhmcnt = si.sadhmcnt;
1177 sh.sadhcnt = si.sadhcnt;
1178
1d1e34dd
DM		 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 }
28d8909b 1186
053c095a
JB		 1187 nlmsg_end(skb, nlh);
1188 return 0;
28d8909b
JHS		 1189}
1190
1191static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1192 struct nlattr **attrs)
28d8909b 1193{
a6483b79 1194 struct net *net = sock_net(skb->sk);
28d8909b 1195 struct sk_buff *r_skb;
7b67c857 1196 u32 *flags = nlmsg_data(nlh);
15e47304 1197 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1198 u32 seq = nlh->nlmsg_seq;
28d8909b 1199
7deb2264 1200 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1201 if (r_skb == NULL)
1202 return -ENOMEM;
1203
15e47304 1204 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1205 BUG();
1206
15e47304 1207 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1208}
1209
22e70050 1210static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1211 struct nlattr **attrs)
1da177e4 1212{
fc34acd3 1213 struct net *net = sock_net(skb->sk);
7b67c857 1214 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1215 struct xfrm_state *x;
1216 struct sk_buff *resp_skb;
eb2971b6 1217 int err = -ESRCH;
1da177e4 1218
fc34acd3 1219 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 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 {
15e47304 1227 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1228 }
1229 xfrm_state_put(x);
1230out_noput:
1231 return err;
1232}
1233
22e70050 1234static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1235 struct nlattr **attrs)
1da177e4 1236{
fc34acd3 1237 struct net *net = sock_net(skb->sk);
1da177e4
LT		 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;
6f26b61e
JHS		 1244 u32 mark;
1245 struct xfrm_mark m;
1da177e4 1246
7b67c857 1247 p = nlmsg_data(nlh);
776e9dd9 1248 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1249 if (err)
1250 goto out_noput;
1251
1252 family = p->info.family;
1253 daddr = &p->info.id.daddr;
1254
1255 x = NULL;
6f26b61e
JHS		 1256
1257 mark = xfrm_mark_get(attrs, &m);
1da177e4 1258 if (p->info.seq) {
6f26b61e 1259 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1260 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1261 xfrm_state_put(x);
1262 x = NULL;
1263 }
1264 }
1265
1266 if (!x)
6f26b61e 1267 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 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
658b219e
HX		 1275 err = xfrm_alloc_spi(x, p->min, p->max);
1276 if (err)
1277 goto out;
1da177e4 1278
658b219e 1279 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1280 if (IS_ERR(resp_skb)) {
1281 err = PTR_ERR(resp_skb);
1282 goto out;
1283 }
1284
15e47304 1285 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1286
1287out:
1288 xfrm_state_put(x);
1289out_noput:
1290 return err;
1291}
1292
b798a9ed 1293static int verify_policy_dir(u8 dir)
1da177e4
LT		 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;
3ff50b79 1303 }
1da177e4
LT		 1304
1305 return 0;
1306}
1307
b798a9ed 1308static int verify_policy_type(u8 type)
f7b6983f
MN		 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;
3ff50b79 1319 }
f7b6983f
MN		 1320
1321 return 0;
1322}
1323
1da177e4
LT		 1324static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1325{
e682adf0
FD		 1326 int ret;
1327
1da177e4
LT		 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;
3ff50b79 1337 }
1da177e4
LT		 1338
1339 switch (p->action) {
1340 case XFRM_POLICY_ALLOW:
1341 case XFRM_POLICY_BLOCK:
1342 break;
1343
1344 default:
1345 return -EINVAL;
3ff50b79 1346 }
1da177e4
LT		 1347
1348 switch (p->sel.family) {
1349 case AF_INET:
1350 break;
1351
1352 case AF_INET6:
dfd56b8b 1353#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1354 break;
1355#else
1356 return -EAFNOSUPPORT;
1357#endif
1358
1359 default:
1360 return -EINVAL;
3ff50b79 1361 }
1da177e4 1362
e682adf0
FD		 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;
1da177e4
LT		 1370}
1371
5424f32e 1372static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1373{
5424f32e 1374 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1375 struct xfrm_user_sec_ctx *uctx;
1376
1377 if (!rt)
1378 return 0;
1379
5424f32e 1380 uctx = nla_data(rt);
52a4c640 1381 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1382}
1383
1da177e4
LT		 1384static 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;
c5d18e98
HX		 1403 /* If all masks are ~0, then we allow all algorithms. */
1404 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1405 t->encap_family = ut->family;
1da177e4
LT		 1406 }
1407}
1408
b4ad86bf
DM		 1409static 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;
dfd56b8b 1430#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1431 case AF_INET6:
1432 break;
1433#endif
1434 default:
1435 return -EINVAL;
3ff50b79 1436 }
b4ad86bf
DM		 1437 }
1438
1439 return 0;
1440}
1441
5424f32e 1442static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1443{
5424f32e 1444 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1445
1446 if (!rt) {
1447 pol->xfrm_nr = 0;
1448 } else {
5424f32e
TG		 1449 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1450 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1451 int err;
1da177e4 1452
b4ad86bf
DM		 1453 err = validate_tmpl(nr, utmpl, pol->family);
1454 if (err)
1455 return err;
1da177e4 1456
5424f32e 1457 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1458 }
1459 return 0;
1460}
1461
5424f32e 1462static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1463{
5424f32e 1464 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1465 struct xfrm_userpolicy_type *upt;
b798a9ed 1466 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1467 int err;
1468
1469 if (rt) {
5424f32e 1470 upt = nla_data(rt);
f7b6983f
MN		 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
1da177e4
LT		 1482static 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
1494static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1495{
7b789836 1496 memset(p, 0, sizeof(*p));
1da177e4
LT		 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
fc34acd3 1509static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1510{
fc34acd3 1511 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1512 int err;
1513
1514 if (!xp) {
1515 *errp = -ENOMEM;
1516 return NULL;
1517 }
1518
1519 copy_from_user_policy(xp, p);
df71837d 1520
35a7aa08 1521 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1522 if (err)
1523 goto error;
1524
35a7aa08
TG		 1525 if (!(err = copy_from_user_tmpl(xp, attrs)))
1526 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1527 if (err)
1528 goto error;
1da177e4 1529
295fae56
JHS		 1530 xfrm_mark_get(attrs, &xp->mark);
1531
1da177e4 1532 return xp;
f7b6983f
MN		 1533 error:
1534 *errp = err;
12a169e7 1535 xp->walk.dead = 1;
64c31b3f 1536 xfrm_policy_destroy(xp);
f7b6983f 1537 return NULL;
1da177e4
LT		 1538}
1539
22e70050 1540static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1541 struct nlattr **attrs)
1da177e4 1542{
fc34acd3 1543 struct net *net = sock_net(skb->sk);
7b67c857 1544 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1545 struct xfrm_policy *xp;
26b15dad 1546 struct km_event c;
1da177e4
LT		 1547 int err;
1548 int excl;
1549
1550 err = verify_newpolicy_info(p);
df71837d
TJ		 1551 if (err)
1552 return err;
35a7aa08 1553 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1554 if (err)
1555 return err;
1556
fc34acd3 1557 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1558 if (!xp)
1559 return err;
1560
25985edc 1561 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 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 */
1da177e4
LT		 1565 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1566 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1567 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1568
1da177e4 1569 if (err) {
03e1ad7b 1570 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1571 kfree(xp);
1572 return err;
1573 }
1574
f60f6b8f 1575 c.event = nlh->nlmsg_type;
26b15dad 1576 c.seq = nlh->nlmsg_seq;
15e47304 1577 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1578 km_policy_notify(xp, p->dir, &c);
1579
1da177e4
LT		 1580 xfrm_pol_put(xp);
1581
1582 return 0;
1583}
1584
1585static 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
1f86840f 1597 memset(up, 0, sizeof(*up));
1da177e4 1598 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1599 up->family = kp->encap_family;
1da177e4
LT		 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 }
df71837d 1609
c0144bea
TG		 1610 return nla_put(skb, XFRMA_TMPL,
1611 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1612}
1613
1614static 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);
df71837d
TJ		 1618 }
1619 return 0;
0d681623 1620}
df71837d 1621
0d681623
SH		 1622static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1623{
1d1e34dd 1624 if (xp->security)
0d681623 1625 return copy_sec_ctx(xp->security, skb);
0d681623 1626 return 0;
df71837d 1627}
cfbfd45a
TG		 1628static 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}
df71837d 1636
f7b6983f 1637#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1638static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1639{
c0144bea
TG		 1640 struct xfrm_userpolicy_type upt = {
1641 .type = type,
1642 };
f7b6983f 1643
c0144bea 1644 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1645}
1646
1647#else
b798a9ed 1648static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1649{
1650 return 0;
1651}
1652#endif
1653
1da177e4
LT		 1654static 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;
1d1e34dd 1661 int err;
1da177e4 1662
15e47304 1663 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1664 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1665 if (nlh == NULL)
1666 return -EMSGSIZE;
1da177e4 1667
7b67c857 1668 p = nlmsg_data(nlh);
1da177e4 1669 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 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 }
9825069d 1681 nlmsg_end(skb, nlh);
1da177e4 1682 return 0;
1da177e4
LT		 1683}
1684
4c563f76
TT		 1685static int xfrm_dump_policy_done(struct netlink_callback *cb)
1686{
1687 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1688 struct net *net = sock_net(cb->skb->sk);
4c563f76 1689
283bc9f3 1690 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1691 return 0;
1692}
1693
1da177e4
LT		 1694static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1695{
fc34acd3 1696 struct net *net = sock_net(skb->sk);
4c563f76 1697 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1698 struct xfrm_dump_info info;
1699
4c563f76
TT		 1700 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1701 sizeof(cb->args) - sizeof(cb->args[0]));
1702
1da177e4
LT		 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;
4c563f76
TT		 1707
1708 if (!cb->args[0]) {
1709 cb->args[0] = 1;
1710 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1711 }
1712
fc34acd3 1713 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1714
1715 return skb->len;
1716}
1717
1718static 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;
c2546372 1724 int err;
1da177e4 1725
7deb2264 1726 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1727 if (!skb)
1728 return ERR_PTR(-ENOMEM);
1729
1da177e4
LT		 1730 info.in_skb = in_skb;
1731 info.out_skb = skb;
1732 info.nlmsg_seq = seq;
1733 info.nlmsg_flags = 0;
1da177e4 1734
c2546372
MK		 1735 err = dump_one_policy(xp, dir, 0, &info);
1736 if (err) {
1da177e4 1737 kfree_skb(skb);
c2546372 1738 return ERR_PTR(err);
1da177e4
LT		 1739 }
1740
1741 return skb;
1742}
1743
22e70050 1744static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1745 struct nlattr **attrs)
1da177e4 1746{
fc34acd3 1747 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1748 struct xfrm_policy *xp;
1749 struct xfrm_userpolicy_id *p;
b798a9ed 1750 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1751 int err;
26b15dad 1752 struct km_event c;
1da177e4 1753 int delete;
295fae56
JHS		 1754 struct xfrm_mark m;
1755 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1756
7b67c857 1757 p = nlmsg_data(nlh);
1da177e4
LT		 1758 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1759
35a7aa08 1760 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1761 if (err)
1762 return err;
1763
1da177e4
LT		 1764 err = verify_policy_dir(p->dir);
1765 if (err)
1766 return err;
1767
1768 if (p->index)
295fae56 1769 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1770 else {
5424f32e 1771 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1772 struct xfrm_sec_ctx *ctx;
df71837d 1773
35a7aa08 1774 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1775 if (err)
1776 return err;
1777
2c8dd116 1778 ctx = NULL;
df71837d 1779 if (rt) {
5424f32e 1780 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1781
52a4c640 1782 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1783 if (err)
df71837d 1784 return err;
2c8dd116 1785 }
295fae56 1786 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1787 ctx, delete, &err);
03e1ad7b 1788 security_xfrm_policy_free(ctx);
df71837d 1789 }
1da177e4
LT		 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 {
a6483b79 1800 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1801 NETLINK_CB(skb).portid);
1da177e4 1802 }
26b15dad 1803 } else {
2e71029e 1804 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1805
1806 if (err != 0)
c8c05a8e 1807 goto out;
13fcfbb0 1808
e7443892 1809 c.data.byid = p->index;
f60f6b8f 1810 c.event = nlh->nlmsg_type;
26b15dad 1811 c.seq = nlh->nlmsg_seq;
15e47304 1812 c.portid = nlh->nlmsg_pid;
26b15dad 1813 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1814 }
1815
c8c05a8e 1816out:
ef41aaa0 1817 xfrm_pol_put(xp);
e4c17216
PM		 1818 if (delete && err == 0)
1819 xfrm_garbage_collect(net);
1da177e4
LT		 1820 return err;
1821}
1822
22e70050 1823static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1824 struct nlattr **attrs)
1da177e4 1825{
fc34acd3 1826 struct net *net = sock_net(skb->sk);
26b15dad 1827 struct km_event c;
7b67c857 1828 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1829 int err;
1da177e4 1830
2e71029e 1831 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1832 if (err) {
1833 if (err == -ESRCH) /* empty table */
1834 return 0;
069c474e 1835 return err;
9e64cc95 1836 }
bf08867f 1837 c.data.proto = p->proto;
f60f6b8f 1838 c.event = nlh->nlmsg_type;
26b15dad 1839 c.seq = nlh->nlmsg_seq;
15e47304 1840 c.portid = nlh->nlmsg_pid;
7067802e 1841 c.net = net;
26b15dad
JHS		 1842 km_state_notify(NULL, &c);
1843
1da177e4
LT		 1844 return 0;
1845}
1846
d8647b79 1847static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1848{
d8647b79
SK		 1849 size_t replay_size = x->replay_esn ?
1850 xfrm_replay_state_esn_len(x->replay_esn) :
1851 sizeof(struct xfrm_replay_state);
1852
7deb2264 1853 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1854 + nla_total_size(replay_size)
de95c4a4 1855 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1856 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1857 + nla_total_size(4) /* XFRM_AE_RTHR */
1858 + nla_total_size(4); /* XFRM_AE_ETHR */
1859}
d51d081d 1860
214e005b 1861static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1862{
1863 struct xfrm_aevent_id *id;
1864 struct nlmsghdr *nlh;
1d1e34dd 1865 int err;
d51d081d 1866
15e47304 1867 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1868 if (nlh == NULL)
1869 return -EMSGSIZE;
d51d081d 1870
7b67c857 1871 id = nlmsg_data(nlh);
931e79d7 1872 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 1873 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1874 id->sa_id.spi = x->id.spi;
1875 id->sa_id.family = x->props.family;
1876 id->sa_id.proto = x->id.proto;
9b7a787d 1877 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1878 id->reqid = x->props.reqid;
d51d081d
JHS		 1879 id->flags = c->data.aevent;
1880
d0fde795 1881 if (x->replay_esn) {
1d1e34dd
DM		 1882 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1883 xfrm_replay_state_esn_len(x->replay_esn),
1884 x->replay_esn);
d0fde795 1885 } else {
1d1e34dd
DM		 1886 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1887 &x->replay);
d0fde795 1888 }
1d1e34dd
DM		 1889 if (err)
1890 goto out_cancel;
de95c4a4
ND		 1891 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1892 XFRMA_PAD);
1d1e34dd
DM		 1893 if (err)
1894 goto out_cancel;
d51d081d 1895
1d1e34dd
DM		 1896 if (id->flags & XFRM_AE_RTHR) {
1897 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1898 if (err)
1899 goto out_cancel;
1900 }
1901 if (id->flags & XFRM_AE_ETHR) {
1902 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1903 x->replay_maxage * 10 / HZ);
1904 if (err)
1905 goto out_cancel;
1906 }
1907 err = xfrm_mark_put(skb, &x->mark);
1908 if (err)
1909 goto out_cancel;
6f26b61e 1910
053c095a
JB		 1911 nlmsg_end(skb, nlh);
1912 return 0;
d51d081d 1913
1d1e34dd 1914out_cancel:
9825069d 1915 nlmsg_cancel(skb, nlh);
1d1e34dd 1916 return err;
d51d081d
JHS		 1917}
1918
22e70050 1919static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1920 struct nlattr **attrs)
d51d081d 1921{
fc34acd3 1922 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1923 struct xfrm_state *x;
1924 struct sk_buff *r_skb;
1925 int err;
1926 struct km_event c;
6f26b61e
JHS		 1927 u32 mark;
1928 struct xfrm_mark m;
7b67c857 1929 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1930 struct xfrm_usersa_id *id = &p->sa_id;
1931
6f26b61e
JHS		 1932 mark = xfrm_mark_get(attrs, &m);
1933
1934 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1935 if (x == NULL)
d51d081d 1936 return -ESRCH;
d8647b79
SK		 1937
1938 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1939 if (r_skb == NULL) {
1940 xfrm_state_put(x);
1941 return -ENOMEM;
d51d081d
JHS		 1942 }
1943
1944 /*
1945 * XXX: is this lock really needed - none of the other
1946 * gets lock (the concern is things getting updated
1947 * while we are still reading) - jhs
1948 */
1949 spin_lock_bh(&x->lock);
1950 c.data.aevent = p->flags;
1951 c.seq = nlh->nlmsg_seq;
15e47304 1952 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1953
1954 if (build_aevent(r_skb, x, &c) < 0)
1955 BUG();
15e47304 1956 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1957 spin_unlock_bh(&x->lock);
1958 xfrm_state_put(x);
1959 return err;
1960}
1961
22e70050 1962static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1963 struct nlattr **attrs)
d51d081d 1964{
fc34acd3 1965 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1966 struct xfrm_state *x;
1967 struct km_event c;
02d0892f 1968 int err = -EINVAL;
6f26b61e
JHS		 1969 u32 mark = 0;
1970 struct xfrm_mark m;
7b67c857 1971 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1972 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1973 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1974 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 1975 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1976 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 1977
4e077237 1978 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 1979 return err;
1980
1981 /* pedantic mode - thou shalt sayeth replaceth */
1982 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1983 return err;
1984
6f26b61e
JHS		 1985 mark = xfrm_mark_get(attrs, &m);
1986
1987 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1988 if (x == NULL)
1989 return -ESRCH;
1990
1991 if (x->km.state != XFRM_STATE_VALID)
1992 goto out;
1993
4479ff76 1994 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1995 if (err)
1996 goto out;
1997
d51d081d 1998 spin_lock_bh(&x->lock);
e3ac104d 1999 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2000 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2001
2002 c.event = nlh->nlmsg_type;
2003 c.seq = nlh->nlmsg_seq;
15e47304 2004 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2005 c.data.aevent = XFRM_AE_CU;
2006 km_state_notify(x, &c);
2007 err = 0;
2008out:
2009 xfrm_state_put(x);
2010 return err;
2011}
2012
22e70050 2013static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2014 struct nlattr **attrs)
1da177e4 2015{
fc34acd3 2016 struct net *net = sock_net(skb->sk);
f7b6983f 2017 struct km_event c;
b798a9ed 2018 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2019 int err;
2020
35a7aa08 2021 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2022 if (err)
2023 return err;
26b15dad 2024
2e71029e 2025 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2026 if (err) {
2027 if (err == -ESRCH) /* empty table */
2028 return 0;
069c474e 2029 return err;
2f1eb65f 2030 }
138437f5 2031 xfrm_garbage_collect(net);
2f1eb65f 2032
f7b6983f 2033 c.data.type = type;
f60f6b8f 2034 c.event = nlh->nlmsg_type;
26b15dad 2035 c.seq = nlh->nlmsg_seq;
15e47304 2036 c.portid = nlh->nlmsg_pid;
7067802e 2037 c.net = net;
26b15dad 2038 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2039 return 0;
2040}
2041
22e70050 2042static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2043 struct nlattr **attrs)
6c5c8ca7 2044{
fc34acd3 2045 struct net *net = sock_net(skb->sk);
6c5c8ca7 2046 struct xfrm_policy *xp;
7b67c857 2047 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2048 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2049 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2050 int err = -ENOENT;
295fae56
JHS		 2051 struct xfrm_mark m;
2052 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 2053
35a7aa08 2054 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2055 if (err)
2056 return err;
2057
c8bf4d04
TT		 2058 err = verify_policy_dir(p->dir);
2059 if (err)
2060 return err;
2061
6c5c8ca7 2062 if (p->index)
295fae56 2063 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 2064 else {
5424f32e 2065 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2066 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2067
35a7aa08 2068 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2069 if (err)
2070 return err;
2071
2c8dd116 2072 ctx = NULL;
6c5c8ca7 2073 if (rt) {
5424f32e 2074 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2075
52a4c640 2076 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2077 if (err)
6c5c8ca7 2078 return err;
2c8dd116 2079 }
295fae56 2080 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2081 &p->sel, ctx, 0, &err);
03e1ad7b 2082 security_xfrm_policy_free(ctx);
6c5c8ca7 2083 }
6c5c8ca7 2084 if (xp == NULL)
ef41aaa0 2085 return -ENOENT;
03e1ad7b 2086
ea2dea9d 2087 if (unlikely(xp->walk.dead))
6c5c8ca7 2088 goto out;
6c5c8ca7 2089
6c5c8ca7
JHS		 2090 err = 0;
2091 if (up->hard) {
2092 xfrm_policy_delete(xp, p->dir);
2e71029e 2093 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2094 }
c6bb8136 2095 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2096
2097out:
2098 xfrm_pol_put(xp);
2099 return err;
2100}
2101
22e70050 2102static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2103 struct nlattr **attrs)
53bc6b4d 2104{
fc34acd3 2105 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2106 struct xfrm_state *x;
2107 int err;
7b67c857 2108 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2109 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2110 struct xfrm_mark m;
928497f0 2111 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2112
6f26b61e 2113 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2114
3a765aa5 2115 err = -ENOENT;
53bc6b4d
JHS		 2116 if (x == NULL)
2117 return err;
2118
53bc6b4d 2119 spin_lock_bh(&x->lock);
3a765aa5 2120 err = -EINVAL;
53bc6b4d
JHS		 2121 if (x->km.state != XFRM_STATE_VALID)
2122 goto out;
c6bb8136 2123 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2124
161a09e7 2125 if (ue->hard) {
53bc6b4d 2126 __xfrm_state_delete(x);
2e71029e 2127 xfrm_audit_state_delete(x, 1, true);
161a09e7 2128 }
3a765aa5 2129 err = 0;
53bc6b4d
JHS		 2130out:
2131 spin_unlock_bh(&x->lock);
2132 xfrm_state_put(x);
2133 return err;
2134}
2135
22e70050 2136static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2137 struct nlattr **attrs)
980ebd25 2138{
fc34acd3 2139 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2140 struct xfrm_policy *xp;
2141 struct xfrm_user_tmpl *ut;
2142 int i;
5424f32e 2143 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2144 struct xfrm_mark mark;
980ebd25 2145
7b67c857 2146 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2147 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2148 int err = -ENOMEM;
2149
2150 if (!x)
d8eb9307 2151 goto nomem;
980ebd25 2152
6f26b61e
JHS		 2153 xfrm_mark_get(attrs, &mark);
2154
980ebd25 2155 err = verify_newpolicy_info(&ua->policy);
d8eb9307 2156 if (err)
73efc324 2157 goto free_state;
980ebd25
JHS		 2158
2159 /* build an XP */
fc34acd3 2160 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2161 if (!xp)
2162 goto free_state;
980ebd25
JHS		 2163
2164 memcpy(&x->id, &ua->id, sizeof(ua->id));
2165 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2166 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2167 xp->mark.m = x->mark.m = mark.m;
2168 xp->mark.v = x->mark.v = mark.v;
5424f32e 2169 ut = nla_data(rt);
980ebd25
JHS		 2170 /* extract the templates and for each call km_key */
2171 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2172 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2173 memcpy(&x->id, &t->id, sizeof(x->id));
2174 x->props.mode = t->mode;
2175 x->props.reqid = t->reqid;
2176 x->props.family = ut->family;
2177 t->aalgos = ua->aalgos;
2178 t->ealgos = ua->ealgos;
2179 t->calgos = ua->calgos;
2180 err = km_query(x, t, xp);
2181
2182 }
2183
2184 kfree(x);
2185 kfree(xp);
2186
2187 return 0;
d8eb9307 2188
d8eb9307
IJ		 2189free_state:
2190 kfree(x);
2191nomem:
2192 return err;
980ebd25
JHS		 2193}
2194
5c79de6e 2195#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2196static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2197 struct xfrm_kmaddress *k,
5424f32e 2198 struct nlattr **attrs, int *num)
5c79de6e 2199{
5424f32e 2200 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2201 struct xfrm_user_migrate *um;
2202 int i, num_migrate;
2203
13c1d189
AE		 2204 if (k != NULL) {
2205 struct xfrm_user_kmaddress *uk;
2206
2207 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2208 memcpy(&k->local, &uk->local, sizeof(k->local));
2209 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2210 k->family = uk->family;
2211 k->reserved = uk->reserved;
2212 }
2213
5424f32e
TG		 2214 um = nla_data(rt);
2215 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2216
2217 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2218 return -EINVAL;
2219
2220 for (i = 0; i < num_migrate; i++, um++, ma++) {
2221 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2222 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2223 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2224 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2225
2226 ma->proto = um->proto;
2227 ma->mode = um->mode;
2228 ma->reqid = um->reqid;
2229
2230 ma->old_family = um->old_family;
2231 ma->new_family = um->new_family;
2232 }
2233
2234 *num = i;
2235 return 0;
2236}
2237
2238static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2239 struct nlattr **attrs)
5c79de6e 2240{
7b67c857 2241 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2242 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2243 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2244 u8 type;
2245 int err;
2246 int n = 0;
8d549c4f 2247 struct net *net = sock_net(skb->sk);
4ab47d47 2248 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2249
35a7aa08 2250 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2251 return -EINVAL;
5c79de6e 2252
13c1d189
AE		 2253 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2254
5424f32e 2255 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2256 if (err)
2257 return err;
2258
13c1d189 2259 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2260 if (err)
2261 return err;
2262
2263 if (!n)
2264 return 0;
2265
4ab47d47
AA		 2266 if (attrs[XFRMA_ENCAP]) {
2267 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2268 sizeof(*encap), GFP_KERNEL);
2269 if (!encap)
2270 return 0;
2271 }
5c79de6e 2272
4ab47d47
AA		 2273 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2274
2275 kfree(encap);
2276
2277 return err;
5c79de6e
SS		 2278}
2279#else
2280static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2281 struct nlattr **attrs)
5c79de6e
SS		 2282{
2283 return -ENOPROTOOPT;
2284}
2285#endif
2286
2287#ifdef CONFIG_XFRM_MIGRATE
183cad12 2288static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2289{
2290 struct xfrm_user_migrate um;
2291
2292 memset(&um, 0, sizeof(um));
2293 um.proto = m->proto;
2294 um.mode = m->mode;
2295 um.reqid = m->reqid;
2296 um.old_family = m->old_family;
2297 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2298 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2299 um.new_family = m->new_family;
2300 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2301 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2302
c0144bea 2303 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2304}
2305
183cad12 2306static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2307{
2308 struct xfrm_user_kmaddress uk;
2309
2310 memset(&uk, 0, sizeof(uk));
2311 uk.family = k->family;
2312 uk.reserved = k->reserved;
2313 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2314 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2315
2316 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2317}
2318
8bafd730
AA		 2319static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma,
2320 int with_encp)
7deb2264
TG		 2321{
2322 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2323 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2324 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2325 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2326 + userpolicy_type_attrsize();
7deb2264
TG		 2327}
2328
183cad12
DM		 2329static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2330 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2331 const struct xfrm_selector *sel,
2332 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2333{
183cad12 2334 const struct xfrm_migrate *mp;
5c79de6e
SS		 2335 struct xfrm_userpolicy_id *pol_id;
2336 struct nlmsghdr *nlh;
1d1e34dd 2337 int i, err;
5c79de6e 2338
79b8b7f4
TG		 2339 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2340 if (nlh == NULL)
2341 return -EMSGSIZE;
5c79de6e 2342
7b67c857 2343 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2344 /* copy data from selector, dir, and type to the pol_id */
2345 memset(pol_id, 0, sizeof(*pol_id));
2346 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2347 pol_id->dir = dir;
2348
1d1e34dd
DM		 2349 if (k != NULL) {
2350 err = copy_to_user_kmaddress(k, skb);
2351 if (err)
2352 goto out_cancel;
2353 }
8bafd730
AA		 2354 if (encap) {
2355 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2356 if (err)
2357 goto out_cancel;
2358 }
1d1e34dd
DM		 2359 err = copy_to_user_policy_type(type, skb);
2360 if (err)
2361 goto out_cancel;
5c79de6e 2362 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2363 err = copy_to_user_migrate(mp, skb);
2364 if (err)
2365 goto out_cancel;
5c79de6e
SS		 2366 }
2367
053c095a
JB		 2368 nlmsg_end(skb, nlh);
2369 return 0;
1d1e34dd
DM		 2370
2371out_cancel:
9825069d 2372 nlmsg_cancel(skb, nlh);
1d1e34dd 2373 return err;
5c79de6e
SS		 2374}
2375
183cad12
DM		 2376static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2377 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2378 const struct xfrm_kmaddress *k,
2379 const struct xfrm_encap_tmpl *encap)
5c79de6e 2380{
a6483b79 2381 struct net *net = &init_net;
5c79de6e 2382 struct sk_buff *skb;
5c79de6e 2383
8bafd730
AA		 2384 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2385 GFP_ATOMIC);
5c79de6e
SS		 2386 if (skb == NULL)
2387 return -ENOMEM;
2388
2389 /* build migrate */
8bafd730 2390 if (build_migrate(skb, m, num_migrate, k, sel, encap, dir, type) < 0)
5c79de6e
SS		 2391 BUG();
2392
21ee543e 2393 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2394}
2395#else
183cad12
DM		 2396static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2397 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2398 const struct xfrm_kmaddress *k,
2399 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2400{
2401 return -ENOPROTOOPT;
2402}
2403#endif
d51d081d 2404
a7bd9a45 2405#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2406
2407static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2408 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2409 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2410 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2411 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2412 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2413 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2414 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2415 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2416 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2417 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2418 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2419 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2420 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2421 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2422 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2423 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2424 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2425 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2426 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2427 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2428 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2429};
2430
492b558b
TG		 2431#undef XMSGSIZE
2432
cf5cb79f 2433static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2434 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2435 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2436 [XFRMA_LASTUSED] = { .type = NLA_U64},
2437 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2438 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2439 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2440 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2441 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2442 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2443 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2444 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2445 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2446 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2447 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2448 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2449 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2450 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2451 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2452 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2453 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2454 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2455 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2456 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2457 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2458 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2459 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2460 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
cf5cb79f
TG		 2461};
2462
880a6fab
CG		 2463static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2464 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2465 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2466};
2467
05600a79 2468static const struct xfrm_link {
5424f32e 2469 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2470 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2471 int (*done)(struct netlink_callback *);
880a6fab
CG		 2472 const struct nla_policy *nla_pol;
2473 int nla_max;
492b558b
TG		 2474} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2475 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2476 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2477 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2478 .dump = xfrm_dump_sa,
2479 .done = xfrm_dump_sa_done },
492b558b
TG		 2480 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2481 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2482 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2483 .dump = xfrm_dump_policy,
2484 .done = xfrm_dump_policy_done },
492b558b 2485 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2486 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2487 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2488 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2489 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2490 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2491 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2492 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2493 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2494 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2495 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2496 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2497 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2498 .nla_pol = xfrma_spd_policy,
2499 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2500 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2501};
2502
2d4bc933
JB		 2503static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2504 struct netlink_ext_ack *extack)
1da177e4 2505{
a6483b79 2506 struct net *net = sock_net(skb->sk);
35a7aa08 2507 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2508 const struct xfrm_link *link;
a7bd9a45 2509 int type, err;
1da177e4 2510
74005991 2511#ifdef CONFIG_COMPAT
2bf8c476 2512 if (in_compat_syscall())
83e2d058 2513 return -EOPNOTSUPP;
74005991
FD		 2514#endif
2515
1da177e4 2516 type = nlh->nlmsg_type;
1da177e4 2517 if (type > XFRM_MSG_MAX)
1d00a4eb 2518 return -EINVAL;
1da177e4
LT		 2519
2520 type -= XFRM_MSG_BASE;
2521 link = &xfrm_dispatch[type];
2522
2523 /* All operations require privileges, even GET */
90f62cf3 2524 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2525 return -EPERM;
1da177e4 2526
492b558b
TG		 2527 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2528 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2529 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2530 if (link->dump == NULL)
1d00a4eb 2531 return -EINVAL;
88fc2c84 2532
80d326fa
PNA		 2533 {
2534 struct netlink_dump_control c = {
2535 .dump = link->dump,
2536 .done = link->done,
2537 };
2538 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2539 }
1da177e4
LT		 2540 }
2541
880a6fab
CG		 2542 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2543 link->nla_max ? : XFRMA_MAX,
fe52145f 2544 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45
TG		 2545 if (err < 0)
2546 return err;
1da177e4
LT		 2547
2548 if (link->doit == NULL)
1d00a4eb 2549 return -EINVAL;
1da177e4 2550
5424f32e 2551 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2552}
2553
cd40b7d3 2554static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2555{
283bc9f3
FD		 2556 struct net *net = sock_net(skb->sk);
2557
2558 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2559 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2560 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2561}
2562
7deb2264
TG		 2563static inline size_t xfrm_expire_msgsize(void)
2564{
6f26b61e
JHS		 2565 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2566 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2567}
2568
214e005b 2569static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2570{
2571 struct xfrm_user_expire *ue;
2572 struct nlmsghdr *nlh;
1d1e34dd 2573 int err;
1da177e4 2574
15e47304 2575 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2576 if (nlh == NULL)
2577 return -EMSGSIZE;
1da177e4 2578
7b67c857 2579 ue = nlmsg_data(nlh);
1da177e4 2580 copy_to_user_state(x, &ue->state);
d51d081d 2581 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16
MK		 2582 /* clear the padding bytes */
2583 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
1da177e4 2584
1d1e34dd
DM		 2585 err = xfrm_mark_put(skb, &x->mark);
2586 if (err)
2587 return err;
6f26b61e 2588
053c095a
JB		 2589 nlmsg_end(skb, nlh);
2590 return 0;
1da177e4
LT		 2591}
2592
214e005b 2593static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2594{
fc34acd3 2595 struct net *net = xs_net(x);
1da177e4
LT		 2596 struct sk_buff *skb;
2597
7deb2264 2598 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2599 if (skb == NULL)
2600 return -ENOMEM;
2601
6f26b61e
JHS		 2602 if (build_expire(skb, x, c) < 0) {
2603 kfree_skb(skb);
2604 return -EMSGSIZE;
2605 }
1da177e4 2606
21ee543e 2607 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2608}
2609
214e005b 2610static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2611{
fc34acd3 2612 struct net *net = xs_net(x);
d51d081d 2613 struct sk_buff *skb;
d51d081d 2614
d8647b79 2615 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2616 if (skb == NULL)
2617 return -ENOMEM;
2618
2619 if (build_aevent(skb, x, c) < 0)
2620 BUG();
2621
21ee543e 2622 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2623}
2624
214e005b 2625static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2626{
7067802e 2627 struct net *net = c->net;
26b15dad
JHS		 2628 struct xfrm_usersa_flush *p;
2629 struct nlmsghdr *nlh;
2630 struct sk_buff *skb;
7deb2264 2631 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2632
7deb2264 2633 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2634 if (skb == NULL)
2635 return -ENOMEM;
26b15dad 2636
15e47304 2637 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2638 if (nlh == NULL) {
2639 kfree_skb(skb);
2640 return -EMSGSIZE;
2641 }
26b15dad 2642
7b67c857 2643 p = nlmsg_data(nlh);
bf08867f 2644 p->proto = c->data.proto;
26b15dad 2645
9825069d 2646 nlmsg_end(skb, nlh);
26b15dad 2647
21ee543e 2648 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2649}
2650
7deb2264 2651static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2652{
7deb2264 2653 size_t l = 0;
1a6509d9
HX		 2654 if (x->aead)
2655 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2656 if (x->aalg) {
2657 l += nla_total_size(sizeof(struct xfrm_algo) +
2658 (x->aalg->alg_key_len + 7) / 8);
2659 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2660 }
26b15dad 2661 if (x->ealg)
0f99be0d 2662 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2663 if (x->calg)
7deb2264 2664 l += nla_total_size(sizeof(*x->calg));
26b15dad 2665 if (x->encap)
7deb2264 2666 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2667 if (x->tfcpad)
2668 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2669 if (x->replay_esn)
2670 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2671 else
2672 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2673 if (x->security)
2674 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2675 x->security->ctx_len);
2676 if (x->coaddr)
2677 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2678 if (x->props.extra_flags)
2679 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 2680 if (x->xso.dev)
2681 l += nla_total_size(sizeof(x->xso));
68325d3b 2682
d26f3984 2683 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 2684 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 2685
2686 return l;
2687}
2688
214e005b 2689static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2690{
fc34acd3 2691 struct net *net = xs_net(x);
26b15dad 2692 struct xfrm_usersa_info *p;
0603eac0 2693 struct xfrm_usersa_id *id;
26b15dad
JHS		 2694 struct nlmsghdr *nlh;
2695 struct sk_buff *skb;
26b15dad 2696 int len = xfrm_sa_len(x);
1d1e34dd 2697 int headlen, err;
0603eac0
HX		 2698
2699 headlen = sizeof(*p);
2700 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2701 len += nla_total_size(headlen);
0603eac0 2702 headlen = sizeof(*id);
6f26b61e 2703 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2704 }
7deb2264 2705 len += NLMSG_ALIGN(headlen);
26b15dad 2706
7deb2264 2707 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2708 if (skb == NULL)
2709 return -ENOMEM;
26b15dad 2710
15e47304 2711 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2712 err = -EMSGSIZE;
79b8b7f4 2713 if (nlh == NULL)
1d1e34dd 2714 goto out_free_skb;
26b15dad 2715
7b67c857 2716 p = nlmsg_data(nlh);
0603eac0 2717 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2718 struct nlattr *attr;
2719
7b67c857 2720 id = nlmsg_data(nlh);
50329c8a 2721 memset(id, 0, sizeof(*id));
0603eac0
HX		 2722 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2723 id->spi = x->id.spi;
2724 id->family = x->props.family;
2725 id->proto = x->id.proto;
2726
c0144bea 2727 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2728 err = -EMSGSIZE;
c0144bea 2729 if (attr == NULL)
1d1e34dd 2730 goto out_free_skb;
c0144bea
TG		 2731
2732 p = nla_data(attr);
0603eac0 2733 }
1d1e34dd
DM		 2734 err = copy_to_user_state_extra(x, p, skb);
2735 if (err)
2736 goto out_free_skb;
26b15dad 2737
9825069d 2738 nlmsg_end(skb, nlh);
26b15dad 2739
21ee543e 2740 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2741
1d1e34dd 2742out_free_skb:
26b15dad 2743 kfree_skb(skb);
1d1e34dd 2744 return err;
26b15dad
JHS		 2745}
2746
214e005b 2747static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2748{
2749
2750 switch (c->event) {
f60f6b8f 2751 case XFRM_MSG_EXPIRE:
26b15dad 2752 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2753 case XFRM_MSG_NEWAE:
2754 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2755 case XFRM_MSG_DELSA:
2756 case XFRM_MSG_UPDSA:
2757 case XFRM_MSG_NEWSA:
26b15dad 2758 return xfrm_notify_sa(x, c);
f60f6b8f 2759 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2760 return xfrm_notify_sa_flush(c);
2761 default:
62db5cfd 2762 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2763 c->event);
2764 break;
26b15dad
JHS		 2765 }
2766
2767 return 0;
2768
2769}
2770
7deb2264
TG		 2771static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2772 struct xfrm_policy *xp)
2773{
2774 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2775 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2776 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2777 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2778 + userpolicy_type_attrsize();
2779}
2780
1da177e4 2781static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2782 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2783{
1d1e34dd 2784 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2785 struct xfrm_user_acquire *ua;
2786 struct nlmsghdr *nlh;
1d1e34dd 2787 int err;
1da177e4 2788
79b8b7f4
TG		 2789 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2790 if (nlh == NULL)
2791 return -EMSGSIZE;
1da177e4 2792
7b67c857 2793 ua = nlmsg_data(nlh);
1da177e4
LT		 2794 memcpy(&ua->id, &x->id, sizeof(ua->id));
2795 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2796 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2797 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2798 ua->aalgos = xt->aalgos;
2799 ua->ealgos = xt->ealgos;
2800 ua->calgos = xt->calgos;
2801 ua->seq = x->km.seq = seq;
2802
1d1e34dd
DM		 2803 err = copy_to_user_tmpl(xp, skb);
2804 if (!err)
2805 err = copy_to_user_state_sec_ctx(x, skb);
2806 if (!err)
2807 err = copy_to_user_policy_type(xp->type, skb);
2808 if (!err)
2809 err = xfrm_mark_put(skb, &xp->mark);
2810 if (err) {
2811 nlmsg_cancel(skb, nlh);
2812 return err;
2813 }
1da177e4 2814
053c095a
JB		 2815 nlmsg_end(skb, nlh);
2816 return 0;
1da177e4
LT		 2817}
2818
2819static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2820 struct xfrm_policy *xp)
1da177e4 2821{
a6483b79 2822 struct net *net = xs_net(x);
1da177e4 2823 struct sk_buff *skb;
1da177e4 2824
7deb2264 2825 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2826 if (skb == NULL)
2827 return -ENOMEM;
2828
65e0736b 2829 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2830 BUG();
2831
21ee543e 2832 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2833}
2834
2835/* User gives us xfrm_user_policy_info followed by an array of 0
2836 * or more templates.
2837 */
cb969f07 2838static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2839 u8 *data, int len, int *dir)
2840{
fc34acd3 2841 struct net *net = sock_net(sk);
1da177e4
LT		 2842 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2843 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2844 struct xfrm_policy *xp;
2845 int nr;
2846
cb969f07 2847 switch (sk->sk_family) {
1da177e4
LT		 2848 case AF_INET:
2849 if (opt != IP_XFRM_POLICY) {
2850 *dir = -EOPNOTSUPP;
2851 return NULL;
2852 }
2853 break;
dfd56b8b 2854#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2855 case AF_INET6:
2856 if (opt != IPV6_XFRM_POLICY) {
2857 *dir = -EOPNOTSUPP;
2858 return NULL;
2859 }
2860 break;
2861#endif
2862 default:
2863 *dir = -EINVAL;
2864 return NULL;
2865 }
2866
2867 *dir = -EINVAL;
2868
2869 if (len < sizeof(*p) ||
2870 verify_newpolicy_info(p))
2871 return NULL;
2872
2873 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2874 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2875 return NULL;
2876
a4f1bac6
HX		 2877 if (p->dir > XFRM_POLICY_OUT)
2878 return NULL;
2879
2f09a4d5 2880 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2881 if (xp == NULL) {
2882 *dir = -ENOBUFS;
2883 return NULL;
2884 }
2885
2886 copy_from_user_policy(xp, p);
f7b6983f 2887 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2888 copy_templates(xp, ut, nr);
2889
2890 *dir = p->dir;
2891
2892 return xp;
2893}
2894
7deb2264
TG		 2895static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2896{
2897 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2898 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2899 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2900 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2901 + userpolicy_type_attrsize();
2902}
2903
1da177e4 2904static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2905 int dir, const struct km_event *c)
1da177e4
LT		 2906{
2907 struct xfrm_user_polexpire *upe;
d51d081d 2908 int hard = c->data.hard;
1d1e34dd
DM		 2909 struct nlmsghdr *nlh;
2910 int err;
1da177e4 2911
15e47304 2912 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2913 if (nlh == NULL)
2914 return -EMSGSIZE;
1da177e4 2915
7b67c857 2916 upe = nlmsg_data(nlh);
1da177e4 2917 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2918 err = copy_to_user_tmpl(xp, skb);
2919 if (!err)
2920 err = copy_to_user_sec_ctx(xp, skb);
2921 if (!err)
2922 err = copy_to_user_policy_type(xp->type, skb);
2923 if (!err)
2924 err = xfrm_mark_put(skb, &xp->mark);
2925 if (err) {
2926 nlmsg_cancel(skb, nlh);
2927 return err;
2928 }
1da177e4
LT		 2929 upe->hard = !!hard;
2930
053c095a
JB		 2931 nlmsg_end(skb, nlh);
2932 return 0;
1da177e4
LT		 2933}
2934
214e005b 2935static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2936{
fc34acd3 2937 struct net *net = xp_net(xp);
1da177e4 2938 struct sk_buff *skb;
1da177e4 2939
7deb2264 2940 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2941 if (skb == NULL)
2942 return -ENOMEM;
2943
d51d081d 2944 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2945 BUG();
2946
21ee543e 2947 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2948}
2949
214e005b 2950static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2951{
1d1e34dd 2952 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2953 struct net *net = xp_net(xp);
26b15dad 2954 struct xfrm_userpolicy_info *p;
0603eac0 2955 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2956 struct nlmsghdr *nlh;
2957 struct sk_buff *skb;
1d1e34dd 2958 int headlen, err;
0603eac0
HX		 2959
2960 headlen = sizeof(*p);
2961 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2962 len += nla_total_size(headlen);
0603eac0
HX		 2963 headlen = sizeof(*id);
2964 }
cfbfd45a 2965 len += userpolicy_type_attrsize();
295fae56 2966 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2967 len += NLMSG_ALIGN(headlen);
26b15dad 2968
7deb2264 2969 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2970 if (skb == NULL)
2971 return -ENOMEM;
26b15dad 2972
15e47304 2973 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2974 err = -EMSGSIZE;
79b8b7f4 2975 if (nlh == NULL)
1d1e34dd 2976 goto out_free_skb;
26b15dad 2977
7b67c857 2978 p = nlmsg_data(nlh);
0603eac0 2979 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2980 struct nlattr *attr;
2981
7b67c857 2982 id = nlmsg_data(nlh);
0603eac0
HX		 2983 memset(id, 0, sizeof(*id));
2984 id->dir = dir;
2985 if (c->data.byid)
2986 id->index = xp->index;
2987 else
2988 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2989
c0144bea 2990 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2991 err = -EMSGSIZE;
c0144bea 2992 if (attr == NULL)
1d1e34dd 2993 goto out_free_skb;
c0144bea
TG		 2994
2995 p = nla_data(attr);
0603eac0 2996 }
26b15dad 2997
26b15dad 2998 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2999 err = copy_to_user_tmpl(xp, skb);
3000 if (!err)
3001 err = copy_to_user_policy_type(xp->type, skb);
3002 if (!err)
3003 err = xfrm_mark_put(skb, &xp->mark);
3004 if (err)
3005 goto out_free_skb;
295fae56 3006
9825069d 3007 nlmsg_end(skb, nlh);
26b15dad 3008
21ee543e 3009 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3010
1d1e34dd 3011out_free_skb:
26b15dad 3012 kfree_skb(skb);
1d1e34dd 3013 return err;
26b15dad
JHS		 3014}
3015
214e005b 3016static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3017{
7067802e 3018 struct net *net = c->net;
26b15dad
JHS		 3019 struct nlmsghdr *nlh;
3020 struct sk_buff *skb;
1d1e34dd 3021 int err;
26b15dad 3022
7deb2264 3023 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3024 if (skb == NULL)
3025 return -ENOMEM;
26b15dad 3026
15e47304 3027 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3028 err = -EMSGSIZE;
79b8b7f4 3029 if (nlh == NULL)
1d1e34dd
DM		 3030 goto out_free_skb;
3031 err = copy_to_user_policy_type(c->data.type, skb);
3032 if (err)
3033 goto out_free_skb;
26b15dad 3034
9825069d 3035 nlmsg_end(skb, nlh);
26b15dad 3036
21ee543e 3037 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3038
1d1e34dd 3039out_free_skb:
26b15dad 3040 kfree_skb(skb);
1d1e34dd 3041 return err;
26b15dad
JHS		 3042}
3043
214e005b 3044static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3045{
3046
3047 switch (c->event) {
f60f6b8f
HX		 3048 case XFRM_MSG_NEWPOLICY:
3049 case XFRM_MSG_UPDPOLICY:
3050 case XFRM_MSG_DELPOLICY:
26b15dad 3051 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3052 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3053 return xfrm_notify_policy_flush(c);
f60f6b8f 3054 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3055 return xfrm_exp_policy_notify(xp, dir, c);
3056 default:
62db5cfd 3057 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3058 c->event);
26b15dad
JHS		 3059 }
3060
3061 return 0;
3062
3063}
3064
7deb2264
TG		 3065static inline size_t xfrm_report_msgsize(void)
3066{
3067 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3068}
3069
97a64b45
MN		 3070static int build_report(struct sk_buff *skb, u8 proto,
3071 struct xfrm_selector *sel, xfrm_address_t *addr)
3072{
3073 struct xfrm_user_report *ur;
3074 struct nlmsghdr *nlh;
97a64b45 3075
79b8b7f4
TG		 3076 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3077 if (nlh == NULL)
3078 return -EMSGSIZE;
97a64b45 3079
7b67c857 3080 ur = nlmsg_data(nlh);
97a64b45
MN		 3081 ur->proto = proto;
3082 memcpy(&ur->sel, sel, sizeof(ur->sel));
3083
1d1e34dd
DM		 3084 if (addr) {
3085 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3086 if (err) {
3087 nlmsg_cancel(skb, nlh);
3088 return err;
3089 }
3090 }
053c095a
JB		 3091 nlmsg_end(skb, nlh);
3092 return 0;
97a64b45
MN		 3093}
3094
db983c11
AD		 3095static int xfrm_send_report(struct net *net, u8 proto,
3096 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3097{
3098 struct sk_buff *skb;
97a64b45 3099
7deb2264 3100 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3101 if (skb == NULL)
3102 return -ENOMEM;
3103
3104 if (build_report(skb, proto, sel, addr) < 0)
3105 BUG();
3106
21ee543e 3107 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3108}
3109
3a2dfbe8
MW		 3110static inline size_t xfrm_mapping_msgsize(void)
3111{
3112 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3113}
3114
3115static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3116 xfrm_address_t *new_saddr, __be16 new_sport)
3117{
3118 struct xfrm_user_mapping *um;
3119 struct nlmsghdr *nlh;
3120
3121 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3122 if (nlh == NULL)
3123 return -EMSGSIZE;
3124
3125 um = nlmsg_data(nlh);
3126
3127 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3128 um->id.spi = x->id.spi;
3129 um->id.family = x->props.family;
3130 um->id.proto = x->id.proto;
3131 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3132 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3133 um->new_sport = new_sport;
3134 um->old_sport = x->encap->encap_sport;
3135 um->reqid = x->props.reqid;
3136
053c095a
JB		 3137 nlmsg_end(skb, nlh);
3138 return 0;
3a2dfbe8
MW		 3139}
3140
3141static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3142 __be16 sport)
3143{
a6483b79 3144 struct net *net = xs_net(x);
3a2dfbe8
MW		 3145 struct sk_buff *skb;
3146
3147 if (x->id.proto != IPPROTO_ESP)
3148 return -EINVAL;
3149
3150 if (!x->encap)
3151 return -EINVAL;
3152
3153 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3154 if (skb == NULL)
3155 return -ENOMEM;
3156
3157 if (build_mapping(skb, x, ipaddr, sport) < 0)
3158 BUG();
3159
21ee543e 3160 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3161}
3162
0f24558e
HG		 3163static bool xfrm_is_alive(const struct km_event *c)
3164{
3165 return (bool)xfrm_acquire_is_on(c->net);
3166}
3167
1da177e4 3168static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3169 .notify = xfrm_send_state_notify,
3170 .acquire = xfrm_send_acquire,
3171 .compile_policy = xfrm_compile_policy,
3172 .notify_policy = xfrm_send_policy_notify,
97a64b45 3173 .report = xfrm_send_report,
5c79de6e 3174 .migrate = xfrm_send_migrate,
3a2dfbe8 3175 .new_mapping = xfrm_send_mapping,
0f24558e 3176 .is_alive = xfrm_is_alive,
1da177e4
LT		 3177};
3178
a6483b79 3179static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3180{
be33690d 3181 struct sock *nlsk;
a31f2d17
PNA		 3182 struct netlink_kernel_cfg cfg = {
3183 .groups = XFRMNLGRP_MAX,
3184 .input = xfrm_netlink_rcv,
3185 };
be33690d 3186
9f00d977 3187 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3188 if (nlsk == NULL)
1da177e4 3189 return -ENOMEM;
d79d792e 3190 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3191 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3192 return 0;
3193}
3194
d79d792e 3195static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3196{
d79d792e
EB		 3197 struct net *net;
3198 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3199 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3200 synchronize_net();
3201 list_for_each_entry(net, net_exit_list, exit_list)
3202 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3203}
3204
a6483b79 3205static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3206 .init = xfrm_user_net_init,
3207 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3208};
3209
3210static int __init xfrm_user_init(void)
3211{
3212 int rv;
3213
3214 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3215
3216 rv = register_pernet_subsys(&xfrm_user_net_ops);
3217 if (rv < 0)
3218 return rv;
3219 rv = xfrm_register_km(&netlink_mgr);
3220 if (rv < 0)
3221 unregister_pernet_subsys(&xfrm_user_net_ops);
3222 return rv;
3223}
3224
3225static void __exit xfrm_user_exit(void)
3226{
3227 xfrm_unregister_km(&netlink_mgr);
3228 unregister_pernet_subsys(&xfrm_user_net_ops);
3229}
3230
1da177e4
LT		 3231module_init(xfrm_user_init);
3232module_exit(xfrm_user_exit);
3233MODULE_LICENSE("GPL");
4fdb3bb7 3234MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3235
Linux 6.x block layer and io_uring tree(s)