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Merge tag 'nfs-for-4.14-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[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
077fbac4
LC		 587 if (attrs[XFRMA_OUTPUT_MARK])
588 x->props.output_mark = nla_get_u32(attrs[XFRMA_OUTPUT_MARK]);
589
ffdb5211 590 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
1da177e4
LT		 591 if (err)
592 goto error;
593
2f30ea50
MK		 594 if (attrs[XFRMA_SEC_CTX]) {
595 err = security_xfrm_state_alloc(x,
596 nla_data(attrs[XFRMA_SEC_CTX]));
597 if (err)
598 goto error;
599 }
df71837d 600
152afb9b
IT		 601 if (attrs[XFRMA_OFFLOAD_DEV]) {
602 err = xfrm_dev_state_add(net, x,
603 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
604 if (err)
605 goto error;
606 }
d77e38e6 607
d8647b79
SK		 608 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
609 attrs[XFRMA_REPLAY_ESN_VAL])))
610 goto error;
611
1da177e4 612 x->km.seq = p->seq;
b27aeadb 613 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 614 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 615 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 616
9fdc4883
SK		 617 if ((err = xfrm_init_replay(x)))
618 goto error;
d51d081d 619
9fdc4883 620 /* override default values from above */
e3ac104d 621 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 622
623 return x;
624
625error:
626 x->km.state = XFRM_STATE_DEAD;
627 xfrm_state_put(x);
628error_no_put:
629 *errp = err;
630 return NULL;
631}
632
22e70050 633static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 634 struct nlattr **attrs)
1da177e4 635{
fc34acd3 636 struct net *net = sock_net(skb->sk);
7b67c857 637 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 638 struct xfrm_state *x;
639 int err;
26b15dad 640 struct km_event c;
1da177e4 641
35a7aa08 642 err = verify_newsa_info(p, attrs);
1da177e4
LT		 643 if (err)
644 return err;
645
fc34acd3 646 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 647 if (!x)
648 return err;
649
26b15dad 650 xfrm_state_hold(x);
1da177e4
LT		 651 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
652 err = xfrm_state_add(x);
653 else
654 err = xfrm_state_update(x);
655
2e71029e 656 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 657
1da177e4
LT		 658 if (err < 0) {
659 x->km.state = XFRM_STATE_DEAD;
21380b81 660 __xfrm_state_put(x);
7d6dfe1f 661 goto out;
1da177e4
LT		 662 }
663
26b15dad 664 c.seq = nlh->nlmsg_seq;
15e47304 665 c.portid = nlh->nlmsg_pid;
f60f6b8f 666 c.event = nlh->nlmsg_type;
26b15dad
JHS		 667
668 km_state_notify(x, &c);
7d6dfe1f 669out:
26b15dad 670 xfrm_state_put(x);
1da177e4
LT		 671 return err;
672}
673
fc34acd3
AD		 674static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
675 struct xfrm_usersa_id *p,
5424f32e 676 struct nlattr **attrs,
eb2971b6
MN		 677 int *errp)
678{
679 struct xfrm_state *x = NULL;
6f26b61e 680 struct xfrm_mark m;
eb2971b6 681 int err;
6f26b61e 682 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 683
684 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
685 err = -ESRCH;
6f26b61e 686 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 687 } else {
688 xfrm_address_t *saddr = NULL;
689
35a7aa08 690 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 691 if (!saddr) {
692 err = -EINVAL;
693 goto out;
694 }
695
9abbffee 696 err = -ESRCH;
6f26b61e
JHS		 697 x = xfrm_state_lookup_byaddr(net, mark,
698 &p->daddr, saddr,
221df1ed 699 p->proto, p->family);
eb2971b6
MN		 700 }
701
702 out:
703 if (!x && errp)
704 *errp = err;
705 return x;
706}
707
22e70050 708static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 709 struct nlattr **attrs)
1da177e4 710{
fc34acd3 711 struct net *net = sock_net(skb->sk);
1da177e4 712 struct xfrm_state *x;
eb2971b6 713 int err = -ESRCH;
26b15dad 714 struct km_event c;
7b67c857 715 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 716
fc34acd3 717 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 718 if (x == NULL)
eb2971b6 719 return err;
1da177e4 720
6f68dc37 721 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 722 goto out;
723
1da177e4 724 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 725 err = -EPERM;
726 goto out;
1da177e4
LT		 727 }
728
26b15dad 729 err = xfrm_state_delete(x);
161a09e7 730
c8c05a8e
CZ		 731 if (err < 0)
732 goto out;
26b15dad
JHS		 733
734 c.seq = nlh->nlmsg_seq;
15e47304 735 c.portid = nlh->nlmsg_pid;
f60f6b8f 736 c.event = nlh->nlmsg_type;
26b15dad 737 km_state_notify(x, &c);
1da177e4 738
c8c05a8e 739out:
2e71029e 740 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 741 xfrm_state_put(x);
26b15dad 742 return err;
1da177e4
LT		 743}
744
745static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
746{
f778a636 747 memset(p, 0, sizeof(*p));
1da177e4
LT		 748 memcpy(&p->id, &x->id, sizeof(p->id));
749 memcpy(&p->sel, &x->sel, sizeof(p->sel));
750 memcpy(&p->lft, &x->lft, sizeof(p->lft));
751 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
e33d4f13
SV		 752 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
753 put_unaligned(x->stats.replay, &p->stats.replay);
754 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
54489c14 755 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 756 p->mode = x->props.mode;
757 p->replay_window = x->props.replay_window;
758 p->reqid = x->props.reqid;
759 p->family = x->props.family;
760 p->flags = x->props.flags;
761 p->seq = x->km.seq;
762}
763
764struct xfrm_dump_info {
765 struct sk_buff *in_skb;
766 struct sk_buff *out_skb;
767 u32 nlmsg_seq;
768 u16 nlmsg_flags;
1da177e4
LT		 769};
770
c0144bea
TG		 771static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
772{
c0144bea
TG		 773 struct xfrm_user_sec_ctx *uctx;
774 struct nlattr *attr;
68325d3b 775 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 776
777 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
778 if (attr == NULL)
779 return -EMSGSIZE;
780
781 uctx = nla_data(attr);
782 uctx->exttype = XFRMA_SEC_CTX;
783 uctx->len = ctx_size;
784 uctx->ctx_doi = s->ctx_doi;
785 uctx->ctx_alg = s->ctx_alg;
786 uctx->ctx_len = s->ctx_len;
787 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
788
789 return 0;
790}
791
d77e38e6
SK		 792static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
793{
794 struct xfrm_user_offload *xuo;
795 struct nlattr *attr;
796
797 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
798 if (attr == NULL)
799 return -EMSGSIZE;
800
801 xuo = nla_data(attr);
5fe0d4bd 802 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 803 xuo->ifindex = xso->dev->ifindex;
804 xuo->flags = xso->flags;
805
806 return 0;
807}
808
4447bb33
MW		 809static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
810{
811 struct xfrm_algo *algo;
812 struct nlattr *nla;
813
814 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
815 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
816 if (!nla)
817 return -EMSGSIZE;
818
819 algo = nla_data(nla);
4c87308b 820 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 821 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
822 algo->alg_key_len = auth->alg_key_len;
823
824 return 0;
825}
826
68325d3b
HX		 827/* Don't change this without updating xfrm_sa_len! */
828static int copy_to_user_state_extra(struct xfrm_state *x,
829 struct xfrm_usersa_info *p,
830 struct sk_buff *skb)
1da177e4 831{
1d1e34dd 832 int ret = 0;
d0fde795 833
1d1e34dd 834 copy_to_user_state(x, p);
68325d3b 835
a947b0a9
ND		 836 if (x->props.extra_flags) {
837 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
838 x->props.extra_flags);
839 if (ret)
840 goto out;
841 }
842
1d1e34dd
DM		 843 if (x->coaddr) {
844 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
845 if (ret)
846 goto out;
847 }
848 if (x->lastused) {
de95c4a4
ND		 849 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
850 XFRMA_PAD);
1d1e34dd
DM		 851 if (ret)
852 goto out;
853 }
854 if (x->aead) {
855 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
856 if (ret)
857 goto out;
858 }
859 if (x->aalg) {
860 ret = copy_to_user_auth(x->aalg, skb);
861 if (!ret)
862 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
863 xfrm_alg_auth_len(x->aalg), x->aalg);
864 if (ret)
865 goto out;
866 }
867 if (x->ealg) {
868 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
869 if (ret)
870 goto out;
871 }
872 if (x->calg) {
873 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
874 if (ret)
875 goto out;
876 }
877 if (x->encap) {
878 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
879 if (ret)
880 goto out;
881 }
882 if (x->tfcpad) {
883 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
884 if (ret)
885 goto out;
886 }
887 ret = xfrm_mark_put(skb, &x->mark);
888 if (ret)
889 goto out;
f293a5e3 890 if (x->replay_esn)
1d1e34dd
DM		 891 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
892 xfrm_replay_state_esn_len(x->replay_esn),
893 x->replay_esn);
f293a5e3 894 else
895 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
896 &x->replay);
897 if (ret)
898 goto out;
d77e38e6
SK		 899 if(x->xso.dev)
900 ret = copy_user_offload(&x->xso, skb);
901 if (ret)
902 goto out;
077fbac4
LC		 903 if (x->props.output_mark) {
904 ret = nla_put_u32(skb, XFRMA_OUTPUT_MARK, x->props.output_mark);
905 if (ret)
906 goto out;
907 }
8598112d
SK		 908 if (x->security)
909 ret = copy_sec_ctx(x->security, skb);
1d1e34dd
DM		 910out:
911 return ret;
68325d3b
HX		 912}
913
914static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
915{
916 struct xfrm_dump_info *sp = ptr;
917 struct sk_buff *in_skb = sp->in_skb;
918 struct sk_buff *skb = sp->out_skb;
919 struct xfrm_usersa_info *p;
920 struct nlmsghdr *nlh;
921 int err;
922
15e47304 923 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 924 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
925 if (nlh == NULL)
926 return -EMSGSIZE;
927
928 p = nlmsg_data(nlh);
929
930 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 931 if (err) {
932 nlmsg_cancel(skb, nlh);
933 return err;
934 }
9825069d 935 nlmsg_end(skb, nlh);
1da177e4 936 return 0;
1da177e4
LT		 937}
938
4c563f76
TT		 939static int xfrm_dump_sa_done(struct netlink_callback *cb)
940{
941 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 942 struct sock *sk = cb->skb->sk;
943 struct net *net = sock_net(sk);
944
1ba5bf99
VN		 945 if (cb->args[0])
946 xfrm_state_walk_done(walk, net);
4c563f76
TT		 947 return 0;
948}
949
d3623099 950static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 951static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
952{
fc34acd3 953 struct net *net = sock_net(skb->sk);
4c563f76 954 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 955 struct xfrm_dump_info info;
956
4c563f76
TT		 957 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
958 sizeof(cb->args) - sizeof(cb->args[0]));
959
1da177e4
LT		 960 info.in_skb = cb->skb;
961 info.out_skb = skb;
962 info.nlmsg_seq = cb->nlh->nlmsg_seq;
963 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 964
965 if (!cb->args[0]) {
d3623099 966 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 967 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 968 u8 proto = 0;
969 int err;
970
fceb6435
JB		 971 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
972 NULL);
d3623099
ND		 973 if (err < 0)
974 return err;
975
870a2df4 976 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 977 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
978 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 979 if (filter == NULL)
980 return -ENOMEM;
d3623099
ND		 981 }
982
983 if (attrs[XFRMA_PROTO])
984 proto = nla_get_u8(attrs[XFRMA_PROTO]);
985
986 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 987 cb->args[0] = 1;
4c563f76
TT		 988 }
989
fc34acd3 990 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 991
992 return skb->len;
993}
994
995static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
996 struct xfrm_state *x, u32 seq)
997{
998 struct xfrm_dump_info info;
999 struct sk_buff *skb;
864745d2 1000 int err;
1da177e4 1001
7deb2264 1002 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 1003 if (!skb)
1004 return ERR_PTR(-ENOMEM);
1005
1da177e4
LT		 1006 info.in_skb = in_skb;
1007 info.out_skb = skb;
1008 info.nlmsg_seq = seq;
1009 info.nlmsg_flags = 0;
1da177e4 1010
864745d2
MK		 1011 err = dump_one_state(x, 0, &info);
1012 if (err) {
1da177e4 1013 kfree_skb(skb);
864745d2 1014 return ERR_PTR(err);
1da177e4
LT		 1015 }
1016
1017 return skb;
1018}
1019
21ee543e
MK		 1020/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1021 * Must be called with RCU read lock.
1022 */
1023static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1024 u32 pid, unsigned int group)
1025{
1026 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1027
1028 if (nlsk)
1029 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1030 else
1031 return -1;
1032}
1033
7deb2264
TG		 1034static inline size_t xfrm_spdinfo_msgsize(void)
1035{
1036 return NLMSG_ALIGN(4)
1037 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1038 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1039 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1040 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1041}
1042
e071041b 1043static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1044 u32 portid, u32 seq, u32 flags)
ecfd6b18 1045{
5a6d3416
JHS		 1046 struct xfrmk_spdinfo si;
1047 struct xfrmu_spdinfo spc;
1048 struct xfrmu_spdhinfo sph;
880a6fab 1049 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1050 struct nlmsghdr *nlh;
1d1e34dd 1051 int err;
ecfd6b18 1052 u32 *f;
880a6fab 1053 unsigned lseq;
ecfd6b18 1054
15e47304 1055 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1056 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1057 return -EMSGSIZE;
1058
1059 f = nlmsg_data(nlh);
1060 *f = flags;
e071041b 1061 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1062 spc.incnt = si.incnt;
1063 spc.outcnt = si.outcnt;
1064 spc.fwdcnt = si.fwdcnt;
1065 spc.inscnt = si.inscnt;
1066 spc.outscnt = si.outscnt;
1067 spc.fwdscnt = si.fwdscnt;
1068 sph.spdhcnt = si.spdhcnt;
1069 sph.spdhmcnt = si.spdhmcnt;
1070
880a6fab
CG		 1071 do {
1072 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1073
1074 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1075 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1076 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1077 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1078 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1079
1d1e34dd
DM		 1080 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1081 if (!err)
1082 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1083 if (!err)
1084 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1085 if (!err)
1086 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1087 if (err) {
1088 nlmsg_cancel(skb, nlh);
1089 return err;
1090 }
ecfd6b18 1091
053c095a
JB		 1092 nlmsg_end(skb, nlh);
1093 return 0;
ecfd6b18
JHS		 1094}
1095
880a6fab
CG		 1096static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1097 struct nlattr **attrs)
1098{
1099 struct net *net = sock_net(skb->sk);
1100 struct xfrmu_spdhthresh *thresh4 = NULL;
1101 struct xfrmu_spdhthresh *thresh6 = NULL;
1102
1103 /* selector prefixlen thresholds to hash policies */
1104 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1105 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1106
1107 if (nla_len(rta) < sizeof(*thresh4))
1108 return -EINVAL;
1109 thresh4 = nla_data(rta);
1110 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1111 return -EINVAL;
1112 }
1113 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1114 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1115
1116 if (nla_len(rta) < sizeof(*thresh6))
1117 return -EINVAL;
1118 thresh6 = nla_data(rta);
1119 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1120 return -EINVAL;
1121 }
1122
1123 if (thresh4 || thresh6) {
1124 write_seqlock(&net->xfrm.policy_hthresh.lock);
1125 if (thresh4) {
1126 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1127 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1128 }
1129 if (thresh6) {
1130 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1131 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1132 }
1133 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1134
1135 xfrm_policy_hash_rebuild(net);
1136 }
1137
1138 return 0;
1139}
1140
ecfd6b18 1141static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1142 struct nlattr **attrs)
ecfd6b18 1143{
a6483b79 1144 struct net *net = sock_net(skb->sk);
ecfd6b18 1145 struct sk_buff *r_skb;
7b67c857 1146 u32 *flags = nlmsg_data(nlh);
15e47304 1147 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1148 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1149
7deb2264 1150 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1151 if (r_skb == NULL)
1152 return -ENOMEM;
1153
15e47304 1154 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1155 BUG();
1156
15e47304 1157 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1158}
1159
7deb2264
TG		 1160static inline size_t xfrm_sadinfo_msgsize(void)
1161{
1162 return NLMSG_ALIGN(4)
1163 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1164 + nla_total_size(4); /* XFRMA_SAD_CNT */
1165}
1166
e071041b 1167static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1168 u32 portid, u32 seq, u32 flags)
28d8909b 1169{
af11e316
JHS		 1170 struct xfrmk_sadinfo si;
1171 struct xfrmu_sadhinfo sh;
28d8909b 1172 struct nlmsghdr *nlh;
1d1e34dd 1173 int err;
28d8909b
JHS		 1174 u32 *f;
1175
15e47304 1176 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1177 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1178 return -EMSGSIZE;
1179
1180 f = nlmsg_data(nlh);
1181 *f = flags;
e071041b 1182 xfrm_sad_getinfo(net, &si);
28d8909b 1183
af11e316
JHS		 1184 sh.sadhmcnt = si.sadhmcnt;
1185 sh.sadhcnt = si.sadhcnt;
1186
1d1e34dd
DM		 1187 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1188 if (!err)
1189 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1190 if (err) {
1191 nlmsg_cancel(skb, nlh);
1192 return err;
1193 }
28d8909b 1194
053c095a
JB		 1195 nlmsg_end(skb, nlh);
1196 return 0;
28d8909b
JHS		 1197}
1198
1199static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1200 struct nlattr **attrs)
28d8909b 1201{
a6483b79 1202 struct net *net = sock_net(skb->sk);
28d8909b 1203 struct sk_buff *r_skb;
7b67c857 1204 u32 *flags = nlmsg_data(nlh);
15e47304 1205 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1206 u32 seq = nlh->nlmsg_seq;
28d8909b 1207
7deb2264 1208 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1209 if (r_skb == NULL)
1210 return -ENOMEM;
1211
15e47304 1212 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1213 BUG();
1214
15e47304 1215 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1216}
1217
22e70050 1218static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1219 struct nlattr **attrs)
1da177e4 1220{
fc34acd3 1221 struct net *net = sock_net(skb->sk);
7b67c857 1222 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1223 struct xfrm_state *x;
1224 struct sk_buff *resp_skb;
eb2971b6 1225 int err = -ESRCH;
1da177e4 1226
fc34acd3 1227 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1228 if (x == NULL)
1229 goto out_noput;
1230
1231 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1232 if (IS_ERR(resp_skb)) {
1233 err = PTR_ERR(resp_skb);
1234 } else {
15e47304 1235 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1236 }
1237 xfrm_state_put(x);
1238out_noput:
1239 return err;
1240}
1241
22e70050 1242static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1243 struct nlattr **attrs)
1da177e4 1244{
fc34acd3 1245 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1246 struct xfrm_state *x;
1247 struct xfrm_userspi_info *p;
1248 struct sk_buff *resp_skb;
1249 xfrm_address_t *daddr;
1250 int family;
1251 int err;
6f26b61e
JHS		 1252 u32 mark;
1253 struct xfrm_mark m;
1da177e4 1254
7b67c857 1255 p = nlmsg_data(nlh);
776e9dd9 1256 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1257 if (err)
1258 goto out_noput;
1259
1260 family = p->info.family;
1261 daddr = &p->info.id.daddr;
1262
1263 x = NULL;
6f26b61e
JHS		 1264
1265 mark = xfrm_mark_get(attrs, &m);
1da177e4 1266 if (p->info.seq) {
6f26b61e 1267 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1268 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1269 xfrm_state_put(x);
1270 x = NULL;
1271 }
1272 }
1273
1274 if (!x)
6f26b61e 1275 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1276 p->info.id.proto, daddr,
1277 &p->info.saddr, 1,
1278 family);
1279 err = -ENOENT;
1280 if (x == NULL)
1281 goto out_noput;
1282
658b219e
HX		 1283 err = xfrm_alloc_spi(x, p->min, p->max);
1284 if (err)
1285 goto out;
1da177e4 1286
658b219e 1287 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1288 if (IS_ERR(resp_skb)) {
1289 err = PTR_ERR(resp_skb);
1290 goto out;
1291 }
1292
15e47304 1293 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1294
1295out:
1296 xfrm_state_put(x);
1297out_noput:
1298 return err;
1299}
1300
b798a9ed 1301static int verify_policy_dir(u8 dir)
1da177e4
LT		 1302{
1303 switch (dir) {
1304 case XFRM_POLICY_IN:
1305 case XFRM_POLICY_OUT:
1306 case XFRM_POLICY_FWD:
1307 break;
1308
1309 default:
1310 return -EINVAL;
3ff50b79 1311 }
1da177e4
LT		 1312
1313 return 0;
1314}
1315
b798a9ed 1316static int verify_policy_type(u8 type)
f7b6983f
MN		 1317{
1318 switch (type) {
1319 case XFRM_POLICY_TYPE_MAIN:
1320#ifdef CONFIG_XFRM_SUB_POLICY
1321 case XFRM_POLICY_TYPE_SUB:
1322#endif
1323 break;
1324
1325 default:
1326 return -EINVAL;
3ff50b79 1327 }
f7b6983f
MN		 1328
1329 return 0;
1330}
1331
1da177e4
LT		 1332static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1333{
e682adf0
FD		 1334 int ret;
1335
1da177e4
LT		 1336 switch (p->share) {
1337 case XFRM_SHARE_ANY:
1338 case XFRM_SHARE_SESSION:
1339 case XFRM_SHARE_USER:
1340 case XFRM_SHARE_UNIQUE:
1341 break;
1342
1343 default:
1344 return -EINVAL;
3ff50b79 1345 }
1da177e4
LT		 1346
1347 switch (p->action) {
1348 case XFRM_POLICY_ALLOW:
1349 case XFRM_POLICY_BLOCK:
1350 break;
1351
1352 default:
1353 return -EINVAL;
3ff50b79 1354 }
1da177e4
LT		 1355
1356 switch (p->sel.family) {
1357 case AF_INET:
1358 break;
1359
1360 case AF_INET6:
dfd56b8b 1361#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1362 break;
1363#else
1364 return -EAFNOSUPPORT;
1365#endif
1366
1367 default:
1368 return -EINVAL;
3ff50b79 1369 }
1da177e4 1370
e682adf0
FD		 1371 ret = verify_policy_dir(p->dir);
1372 if (ret)
1373 return ret;
1374 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1375 return -EINVAL;
1376
1377 return 0;
1da177e4
LT		 1378}
1379
5424f32e 1380static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1381{
5424f32e 1382 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1383 struct xfrm_user_sec_ctx *uctx;
1384
1385 if (!rt)
1386 return 0;
1387
5424f32e 1388 uctx = nla_data(rt);
52a4c640 1389 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1390}
1391
1da177e4
LT		 1392static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1393 int nr)
1394{
1395 int i;
1396
1397 xp->xfrm_nr = nr;
1398 for (i = 0; i < nr; i++, ut++) {
1399 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1400
1401 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1402 memcpy(&t->saddr, &ut->saddr,
1403 sizeof(xfrm_address_t));
1404 t->reqid = ut->reqid;
1405 t->mode = ut->mode;
1406 t->share = ut->share;
1407 t->optional = ut->optional;
1408 t->aalgos = ut->aalgos;
1409 t->ealgos = ut->ealgos;
1410 t->calgos = ut->calgos;
c5d18e98
HX		 1411 /* If all masks are ~0, then we allow all algorithms. */
1412 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1413 t->encap_family = ut->family;
1da177e4
LT		 1414 }
1415}
1416
b4ad86bf
DM		 1417static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1418{
1419 int i;
1420
1421 if (nr > XFRM_MAX_DEPTH)
1422 return -EINVAL;
1423
1424 for (i = 0; i < nr; i++) {
1425 /* We never validated the ut->family value, so many
1426 * applications simply leave it at zero. The check was
1427 * never made and ut->family was ignored because all
1428 * templates could be assumed to have the same family as
1429 * the policy itself. Now that we will have ipv4-in-ipv6
1430 * and ipv6-in-ipv4 tunnels, this is no longer true.
1431 */
1432 if (!ut[i].family)
1433 ut[i].family = family;
1434
1435 switch (ut[i].family) {
1436 case AF_INET:
1437 break;
dfd56b8b 1438#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1439 case AF_INET6:
1440 break;
1441#endif
1442 default:
1443 return -EINVAL;
3ff50b79 1444 }
b4ad86bf
DM		 1445 }
1446
1447 return 0;
1448}
1449
5424f32e 1450static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1451{
5424f32e 1452 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1453
1454 if (!rt) {
1455 pol->xfrm_nr = 0;
1456 } else {
5424f32e
TG		 1457 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1458 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1459 int err;
1da177e4 1460
b4ad86bf
DM		 1461 err = validate_tmpl(nr, utmpl, pol->family);
1462 if (err)
1463 return err;
1da177e4 1464
5424f32e 1465 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1466 }
1467 return 0;
1468}
1469
5424f32e 1470static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1471{
5424f32e 1472 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1473 struct xfrm_userpolicy_type *upt;
b798a9ed 1474 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1475 int err;
1476
1477 if (rt) {
5424f32e 1478 upt = nla_data(rt);
f7b6983f
MN		 1479 type = upt->type;
1480 }
1481
1482 err = verify_policy_type(type);
1483 if (err)
1484 return err;
1485
1486 *tp = type;
1487 return 0;
1488}
1489
1da177e4
LT		 1490static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1491{
1492 xp->priority = p->priority;
1493 xp->index = p->index;
1494 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1495 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1496 xp->action = p->action;
1497 xp->flags = p->flags;
1498 xp->family = p->sel.family;
1499 /* XXX xp->share = p->share; */
1500}
1501
1502static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1503{
7b789836 1504 memset(p, 0, sizeof(*p));
1da177e4
LT		 1505 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1506 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1507 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1508 p->priority = xp->priority;
1509 p->index = xp->index;
1510 p->sel.family = xp->family;
1511 p->dir = dir;
1512 p->action = xp->action;
1513 p->flags = xp->flags;
1514 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1515}
1516
fc34acd3 1517static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1518{
fc34acd3 1519 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1520 int err;
1521
1522 if (!xp) {
1523 *errp = -ENOMEM;
1524 return NULL;
1525 }
1526
1527 copy_from_user_policy(xp, p);
df71837d 1528
35a7aa08 1529 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1530 if (err)
1531 goto error;
1532
35a7aa08
TG		 1533 if (!(err = copy_from_user_tmpl(xp, attrs)))
1534 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1535 if (err)
1536 goto error;
1da177e4 1537
295fae56
JHS		 1538 xfrm_mark_get(attrs, &xp->mark);
1539
1da177e4 1540 return xp;
f7b6983f
MN		 1541 error:
1542 *errp = err;
12a169e7 1543 xp->walk.dead = 1;
64c31b3f 1544 xfrm_policy_destroy(xp);
f7b6983f 1545 return NULL;
1da177e4
LT		 1546}
1547
22e70050 1548static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1549 struct nlattr **attrs)
1da177e4 1550{
fc34acd3 1551 struct net *net = sock_net(skb->sk);
7b67c857 1552 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1553 struct xfrm_policy *xp;
26b15dad 1554 struct km_event c;
1da177e4
LT		 1555 int err;
1556 int excl;
1557
1558 err = verify_newpolicy_info(p);
df71837d
TJ		 1559 if (err)
1560 return err;
35a7aa08 1561 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1562 if (err)
1563 return err;
1564
fc34acd3 1565 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1566 if (!xp)
1567 return err;
1568
25985edc 1569 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1570 * Aha! this is anti-netlink really i.e more pfkey derived
1571 * in netlink excl is a flag and you wouldnt need
1572 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1573 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1574 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1575 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1576
1da177e4 1577 if (err) {
03e1ad7b 1578 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1579 kfree(xp);
1580 return err;
1581 }
1582
f60f6b8f 1583 c.event = nlh->nlmsg_type;
26b15dad 1584 c.seq = nlh->nlmsg_seq;
15e47304 1585 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1586 km_policy_notify(xp, p->dir, &c);
1587
1da177e4
LT		 1588 xfrm_pol_put(xp);
1589
1590 return 0;
1591}
1592
1593static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1594{
1595 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1596 int i;
1597
1598 if (xp->xfrm_nr == 0)
1599 return 0;
1600
1601 for (i = 0; i < xp->xfrm_nr; i++) {
1602 struct xfrm_user_tmpl *up = &vec[i];
1603 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1604
1f86840f 1605 memset(up, 0, sizeof(*up));
1da177e4 1606 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1607 up->family = kp->encap_family;
1da177e4
LT		 1608 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1609 up->reqid = kp->reqid;
1610 up->mode = kp->mode;
1611 up->share = kp->share;
1612 up->optional = kp->optional;
1613 up->aalgos = kp->aalgos;
1614 up->ealgos = kp->ealgos;
1615 up->calgos = kp->calgos;
1616 }
df71837d 1617
c0144bea
TG		 1618 return nla_put(skb, XFRMA_TMPL,
1619 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1620}
1621
1622static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1623{
1624 if (x->security) {
1625 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1626 }
1627 return 0;
0d681623 1628}
df71837d 1629
0d681623
SH		 1630static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1631{
1d1e34dd 1632 if (xp->security)
0d681623 1633 return copy_sec_ctx(xp->security, skb);
0d681623 1634 return 0;
df71837d 1635}
cfbfd45a
TG		 1636static inline size_t userpolicy_type_attrsize(void)
1637{
1638#ifdef CONFIG_XFRM_SUB_POLICY
1639 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1640#else
1641 return 0;
1642#endif
1643}
df71837d 1644
f7b6983f 1645#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1646static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1647{
c0144bea
TG		 1648 struct xfrm_userpolicy_type upt = {
1649 .type = type,
1650 };
f7b6983f 1651
c0144bea 1652 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1653}
1654
1655#else
b798a9ed 1656static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1657{
1658 return 0;
1659}
1660#endif
1661
1da177e4
LT		 1662static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1663{
1664 struct xfrm_dump_info *sp = ptr;
1665 struct xfrm_userpolicy_info *p;
1666 struct sk_buff *in_skb = sp->in_skb;
1667 struct sk_buff *skb = sp->out_skb;
1668 struct nlmsghdr *nlh;
1d1e34dd 1669 int err;
1da177e4 1670
15e47304 1671 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1672 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1673 if (nlh == NULL)
1674 return -EMSGSIZE;
1da177e4 1675
7b67c857 1676 p = nlmsg_data(nlh);
1da177e4 1677 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1678 err = copy_to_user_tmpl(xp, skb);
1679 if (!err)
1680 err = copy_to_user_sec_ctx(xp, skb);
1681 if (!err)
1682 err = copy_to_user_policy_type(xp->type, skb);
1683 if (!err)
1684 err = xfrm_mark_put(skb, &xp->mark);
1685 if (err) {
1686 nlmsg_cancel(skb, nlh);
1687 return err;
1688 }
9825069d 1689 nlmsg_end(skb, nlh);
1da177e4 1690 return 0;
1da177e4
LT		 1691}
1692
4c563f76
TT		 1693static int xfrm_dump_policy_done(struct netlink_callback *cb)
1694{
1695 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1696 struct net *net = sock_net(cb->skb->sk);
4c563f76 1697
283bc9f3 1698 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1699 return 0;
1700}
1701
1da177e4
LT		 1702static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1703{
fc34acd3 1704 struct net *net = sock_net(skb->sk);
4c563f76 1705 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1706 struct xfrm_dump_info info;
1707
4c563f76
TT		 1708 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1709 sizeof(cb->args) - sizeof(cb->args[0]));
1710
1da177e4
LT		 1711 info.in_skb = cb->skb;
1712 info.out_skb = skb;
1713 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1714 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1715
1716 if (!cb->args[0]) {
1717 cb->args[0] = 1;
1718 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1719 }
1720
fc34acd3 1721 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1722
1723 return skb->len;
1724}
1725
1726static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1727 struct xfrm_policy *xp,
1728 int dir, u32 seq)
1729{
1730 struct xfrm_dump_info info;
1731 struct sk_buff *skb;
c2546372 1732 int err;
1da177e4 1733
7deb2264 1734 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1735 if (!skb)
1736 return ERR_PTR(-ENOMEM);
1737
1da177e4
LT		 1738 info.in_skb = in_skb;
1739 info.out_skb = skb;
1740 info.nlmsg_seq = seq;
1741 info.nlmsg_flags = 0;
1da177e4 1742
c2546372
MK		 1743 err = dump_one_policy(xp, dir, 0, &info);
1744 if (err) {
1da177e4 1745 kfree_skb(skb);
c2546372 1746 return ERR_PTR(err);
1da177e4
LT		 1747 }
1748
1749 return skb;
1750}
1751
22e70050 1752static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1753 struct nlattr **attrs)
1da177e4 1754{
fc34acd3 1755 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1756 struct xfrm_policy *xp;
1757 struct xfrm_userpolicy_id *p;
b798a9ed 1758 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1759 int err;
26b15dad 1760 struct km_event c;
1da177e4 1761 int delete;
295fae56
JHS		 1762 struct xfrm_mark m;
1763 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1764
7b67c857 1765 p = nlmsg_data(nlh);
1da177e4
LT		 1766 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1767
35a7aa08 1768 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1769 if (err)
1770 return err;
1771
1da177e4
LT		 1772 err = verify_policy_dir(p->dir);
1773 if (err)
1774 return err;
1775
1776 if (p->index)
295fae56 1777 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1778 else {
5424f32e 1779 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1780 struct xfrm_sec_ctx *ctx;
df71837d 1781
35a7aa08 1782 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1783 if (err)
1784 return err;
1785
2c8dd116 1786 ctx = NULL;
df71837d 1787 if (rt) {
5424f32e 1788 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1789
52a4c640 1790 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1791 if (err)
df71837d 1792 return err;
2c8dd116 1793 }
295fae56 1794 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1795 ctx, delete, &err);
03e1ad7b 1796 security_xfrm_policy_free(ctx);
df71837d 1797 }
1da177e4
LT		 1798 if (xp == NULL)
1799 return -ENOENT;
1800
1801 if (!delete) {
1802 struct sk_buff *resp_skb;
1803
1804 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1805 if (IS_ERR(resp_skb)) {
1806 err = PTR_ERR(resp_skb);
1807 } else {
a6483b79 1808 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1809 NETLINK_CB(skb).portid);
1da177e4 1810 }
26b15dad 1811 } else {
2e71029e 1812 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1813
1814 if (err != 0)
c8c05a8e 1815 goto out;
13fcfbb0 1816
e7443892 1817 c.data.byid = p->index;
f60f6b8f 1818 c.event = nlh->nlmsg_type;
26b15dad 1819 c.seq = nlh->nlmsg_seq;
15e47304 1820 c.portid = nlh->nlmsg_pid;
26b15dad 1821 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1822 }
1823
c8c05a8e 1824out:
ef41aaa0 1825 xfrm_pol_put(xp);
1da177e4
LT		 1826 return err;
1827}
1828
22e70050 1829static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1830 struct nlattr **attrs)
1da177e4 1831{
fc34acd3 1832 struct net *net = sock_net(skb->sk);
26b15dad 1833 struct km_event c;
7b67c857 1834 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1835 int err;
1da177e4 1836
2e71029e 1837 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1838 if (err) {
1839 if (err == -ESRCH) /* empty table */
1840 return 0;
069c474e 1841 return err;
9e64cc95 1842 }
bf08867f 1843 c.data.proto = p->proto;
f60f6b8f 1844 c.event = nlh->nlmsg_type;
26b15dad 1845 c.seq = nlh->nlmsg_seq;
15e47304 1846 c.portid = nlh->nlmsg_pid;
7067802e 1847 c.net = net;
26b15dad
JHS		 1848 km_state_notify(NULL, &c);
1849
1da177e4
LT		 1850 return 0;
1851}
1852
d8647b79 1853static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1854{
d8647b79
SK		 1855 size_t replay_size = x->replay_esn ?
1856 xfrm_replay_state_esn_len(x->replay_esn) :
1857 sizeof(struct xfrm_replay_state);
1858
7deb2264 1859 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1860 + nla_total_size(replay_size)
de95c4a4 1861 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1862 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1863 + nla_total_size(4) /* XFRM_AE_RTHR */
1864 + nla_total_size(4); /* XFRM_AE_ETHR */
1865}
d51d081d 1866
214e005b 1867static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1868{
1869 struct xfrm_aevent_id *id;
1870 struct nlmsghdr *nlh;
1d1e34dd 1871 int err;
d51d081d 1872
15e47304 1873 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1874 if (nlh == NULL)
1875 return -EMSGSIZE;
d51d081d 1876
7b67c857 1877 id = nlmsg_data(nlh);
931e79d7 1878 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 1879 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1880 id->sa_id.spi = x->id.spi;
1881 id->sa_id.family = x->props.family;
1882 id->sa_id.proto = x->id.proto;
9b7a787d 1883 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1884 id->reqid = x->props.reqid;
d51d081d
JHS		 1885 id->flags = c->data.aevent;
1886
d0fde795 1887 if (x->replay_esn) {
1d1e34dd
DM		 1888 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1889 xfrm_replay_state_esn_len(x->replay_esn),
1890 x->replay_esn);
d0fde795 1891 } else {
1d1e34dd
DM		 1892 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1893 &x->replay);
d0fde795 1894 }
1d1e34dd
DM		 1895 if (err)
1896 goto out_cancel;
de95c4a4
ND		 1897 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1898 XFRMA_PAD);
1d1e34dd
DM		 1899 if (err)
1900 goto out_cancel;
d51d081d 1901
1d1e34dd
DM		 1902 if (id->flags & XFRM_AE_RTHR) {
1903 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1904 if (err)
1905 goto out_cancel;
1906 }
1907 if (id->flags & XFRM_AE_ETHR) {
1908 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1909 x->replay_maxage * 10 / HZ);
1910 if (err)
1911 goto out_cancel;
1912 }
1913 err = xfrm_mark_put(skb, &x->mark);
1914 if (err)
1915 goto out_cancel;
6f26b61e 1916
053c095a
JB		 1917 nlmsg_end(skb, nlh);
1918 return 0;
d51d081d 1919
1d1e34dd 1920out_cancel:
9825069d 1921 nlmsg_cancel(skb, nlh);
1d1e34dd 1922 return err;
d51d081d
JHS		 1923}
1924
22e70050 1925static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1926 struct nlattr **attrs)
d51d081d 1927{
fc34acd3 1928 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1929 struct xfrm_state *x;
1930 struct sk_buff *r_skb;
1931 int err;
1932 struct km_event c;
6f26b61e
JHS		 1933 u32 mark;
1934 struct xfrm_mark m;
7b67c857 1935 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1936 struct xfrm_usersa_id *id = &p->sa_id;
1937
6f26b61e
JHS		 1938 mark = xfrm_mark_get(attrs, &m);
1939
1940 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1941 if (x == NULL)
d51d081d 1942 return -ESRCH;
d8647b79
SK		 1943
1944 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1945 if (r_skb == NULL) {
1946 xfrm_state_put(x);
1947 return -ENOMEM;
d51d081d
JHS		 1948 }
1949
1950 /*
1951 * XXX: is this lock really needed - none of the other
1952 * gets lock (the concern is things getting updated
1953 * while we are still reading) - jhs
1954 */
1955 spin_lock_bh(&x->lock);
1956 c.data.aevent = p->flags;
1957 c.seq = nlh->nlmsg_seq;
15e47304 1958 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1959
1960 if (build_aevent(r_skb, x, &c) < 0)
1961 BUG();
15e47304 1962 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1963 spin_unlock_bh(&x->lock);
1964 xfrm_state_put(x);
1965 return err;
1966}
1967
22e70050 1968static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1969 struct nlattr **attrs)
d51d081d 1970{
fc34acd3 1971 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1972 struct xfrm_state *x;
1973 struct km_event c;
02d0892f 1974 int err = -EINVAL;
6f26b61e
JHS		 1975 u32 mark = 0;
1976 struct xfrm_mark m;
7b67c857 1977 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1978 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1979 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1980 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 1981 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1982 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 1983
4e077237 1984 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 1985 return err;
1986
1987 /* pedantic mode - thou shalt sayeth replaceth */
1988 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1989 return err;
1990
6f26b61e
JHS		 1991 mark = xfrm_mark_get(attrs, &m);
1992
1993 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1994 if (x == NULL)
1995 return -ESRCH;
1996
1997 if (x->km.state != XFRM_STATE_VALID)
1998 goto out;
1999
4479ff76 2000 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 2001 if (err)
2002 goto out;
2003
d51d081d 2004 spin_lock_bh(&x->lock);
e3ac104d 2005 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2006 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2007
2008 c.event = nlh->nlmsg_type;
2009 c.seq = nlh->nlmsg_seq;
15e47304 2010 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2011 c.data.aevent = XFRM_AE_CU;
2012 km_state_notify(x, &c);
2013 err = 0;
2014out:
2015 xfrm_state_put(x);
2016 return err;
2017}
2018
22e70050 2019static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2020 struct nlattr **attrs)
1da177e4 2021{
fc34acd3 2022 struct net *net = sock_net(skb->sk);
f7b6983f 2023 struct km_event c;
b798a9ed 2024 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2025 int err;
2026
35a7aa08 2027 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2028 if (err)
2029 return err;
26b15dad 2030
2e71029e 2031 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2032 if (err) {
2033 if (err == -ESRCH) /* empty table */
2034 return 0;
069c474e 2035 return err;
2f1eb65f
JHS		 2036 }
2037
f7b6983f 2038 c.data.type = type;
f60f6b8f 2039 c.event = nlh->nlmsg_type;
26b15dad 2040 c.seq = nlh->nlmsg_seq;
15e47304 2041 c.portid = nlh->nlmsg_pid;
7067802e 2042 c.net = net;
26b15dad 2043 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2044 return 0;
2045}
2046
22e70050 2047static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2048 struct nlattr **attrs)
6c5c8ca7 2049{
fc34acd3 2050 struct net *net = sock_net(skb->sk);
6c5c8ca7 2051 struct xfrm_policy *xp;
7b67c857 2052 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2053 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2054 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2055 int err = -ENOENT;
295fae56
JHS		 2056 struct xfrm_mark m;
2057 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 2058
35a7aa08 2059 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2060 if (err)
2061 return err;
2062
c8bf4d04
TT		 2063 err = verify_policy_dir(p->dir);
2064 if (err)
2065 return err;
2066
6c5c8ca7 2067 if (p->index)
295fae56 2068 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 2069 else {
5424f32e 2070 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2071 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2072
35a7aa08 2073 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2074 if (err)
2075 return err;
2076
2c8dd116 2077 ctx = NULL;
6c5c8ca7 2078 if (rt) {
5424f32e 2079 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2080
52a4c640 2081 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2082 if (err)
6c5c8ca7 2083 return err;
2c8dd116 2084 }
295fae56 2085 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2086 &p->sel, ctx, 0, &err);
03e1ad7b 2087 security_xfrm_policy_free(ctx);
6c5c8ca7 2088 }
6c5c8ca7 2089 if (xp == NULL)
ef41aaa0 2090 return -ENOENT;
03e1ad7b 2091
ea2dea9d 2092 if (unlikely(xp->walk.dead))
6c5c8ca7 2093 goto out;
6c5c8ca7 2094
6c5c8ca7
JHS		 2095 err = 0;
2096 if (up->hard) {
2097 xfrm_policy_delete(xp, p->dir);
2e71029e 2098 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2099 }
c6bb8136 2100 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2101
2102out:
2103 xfrm_pol_put(xp);
2104 return err;
2105}
2106
22e70050 2107static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2108 struct nlattr **attrs)
53bc6b4d 2109{
fc34acd3 2110 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2111 struct xfrm_state *x;
2112 int err;
7b67c857 2113 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2114 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2115 struct xfrm_mark m;
928497f0 2116 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2117
6f26b61e 2118 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2119
3a765aa5 2120 err = -ENOENT;
53bc6b4d
JHS		 2121 if (x == NULL)
2122 return err;
2123
53bc6b4d 2124 spin_lock_bh(&x->lock);
3a765aa5 2125 err = -EINVAL;
53bc6b4d
JHS		 2126 if (x->km.state != XFRM_STATE_VALID)
2127 goto out;
c6bb8136 2128 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2129
161a09e7 2130 if (ue->hard) {
53bc6b4d 2131 __xfrm_state_delete(x);
2e71029e 2132 xfrm_audit_state_delete(x, 1, true);
161a09e7 2133 }
3a765aa5 2134 err = 0;
53bc6b4d
JHS		 2135out:
2136 spin_unlock_bh(&x->lock);
2137 xfrm_state_put(x);
2138 return err;
2139}
2140
22e70050 2141static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2142 struct nlattr **attrs)
980ebd25 2143{
fc34acd3 2144 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2145 struct xfrm_policy *xp;
2146 struct xfrm_user_tmpl *ut;
2147 int i;
5424f32e 2148 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2149 struct xfrm_mark mark;
980ebd25 2150
7b67c857 2151 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2152 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2153 int err = -ENOMEM;
2154
2155 if (!x)
d8eb9307 2156 goto nomem;
980ebd25 2157
6f26b61e
JHS		 2158 xfrm_mark_get(attrs, &mark);
2159
980ebd25 2160 err = verify_newpolicy_info(&ua->policy);
d8eb9307 2161 if (err)
73efc324 2162 goto free_state;
980ebd25
JHS		 2163
2164 /* build an XP */
fc34acd3 2165 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2166 if (!xp)
2167 goto free_state;
980ebd25
JHS		 2168
2169 memcpy(&x->id, &ua->id, sizeof(ua->id));
2170 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2171 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2172 xp->mark.m = x->mark.m = mark.m;
2173 xp->mark.v = x->mark.v = mark.v;
5424f32e 2174 ut = nla_data(rt);
980ebd25
JHS		 2175 /* extract the templates and for each call km_key */
2176 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2177 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2178 memcpy(&x->id, &t->id, sizeof(x->id));
2179 x->props.mode = t->mode;
2180 x->props.reqid = t->reqid;
2181 x->props.family = ut->family;
2182 t->aalgos = ua->aalgos;
2183 t->ealgos = ua->ealgos;
2184 t->calgos = ua->calgos;
2185 err = km_query(x, t, xp);
2186
2187 }
2188
2189 kfree(x);
2190 kfree(xp);
2191
2192 return 0;
d8eb9307 2193
d8eb9307
IJ		 2194free_state:
2195 kfree(x);
2196nomem:
2197 return err;
980ebd25
JHS		 2198}
2199
5c79de6e 2200#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2201static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2202 struct xfrm_kmaddress *k,
5424f32e 2203 struct nlattr **attrs, int *num)
5c79de6e 2204{
5424f32e 2205 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2206 struct xfrm_user_migrate *um;
2207 int i, num_migrate;
2208
13c1d189
AE		 2209 if (k != NULL) {
2210 struct xfrm_user_kmaddress *uk;
2211
2212 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2213 memcpy(&k->local, &uk->local, sizeof(k->local));
2214 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2215 k->family = uk->family;
2216 k->reserved = uk->reserved;
2217 }
2218
5424f32e
TG		 2219 um = nla_data(rt);
2220 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2221
2222 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2223 return -EINVAL;
2224
2225 for (i = 0; i < num_migrate; i++, um++, ma++) {
2226 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2227 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2228 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2229 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2230
2231 ma->proto = um->proto;
2232 ma->mode = um->mode;
2233 ma->reqid = um->reqid;
2234
2235 ma->old_family = um->old_family;
2236 ma->new_family = um->new_family;
2237 }
2238
2239 *num = i;
2240 return 0;
2241}
2242
2243static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2244 struct nlattr **attrs)
5c79de6e 2245{
7b67c857 2246 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2247 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2248 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2249 u8 type;
2250 int err;
2251 int n = 0;
8d549c4f 2252 struct net *net = sock_net(skb->sk);
4ab47d47 2253 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2254
35a7aa08 2255 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2256 return -EINVAL;
5c79de6e 2257
13c1d189
AE		 2258 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2259
5424f32e 2260 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2261 if (err)
2262 return err;
2263
13c1d189 2264 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2265 if (err)
2266 return err;
2267
2268 if (!n)
2269 return 0;
2270
4ab47d47
AA		 2271 if (attrs[XFRMA_ENCAP]) {
2272 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2273 sizeof(*encap), GFP_KERNEL);
2274 if (!encap)
2275 return 0;
2276 }
5c79de6e 2277
4ab47d47
AA		 2278 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2279
2280 kfree(encap);
2281
2282 return err;
5c79de6e
SS		 2283}
2284#else
2285static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2286 struct nlattr **attrs)
5c79de6e
SS		 2287{
2288 return -ENOPROTOOPT;
2289}
2290#endif
2291
2292#ifdef CONFIG_XFRM_MIGRATE
183cad12 2293static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2294{
2295 struct xfrm_user_migrate um;
2296
2297 memset(&um, 0, sizeof(um));
2298 um.proto = m->proto;
2299 um.mode = m->mode;
2300 um.reqid = m->reqid;
2301 um.old_family = m->old_family;
2302 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2303 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2304 um.new_family = m->new_family;
2305 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2306 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2307
c0144bea 2308 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2309}
2310
183cad12 2311static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2312{
2313 struct xfrm_user_kmaddress uk;
2314
2315 memset(&uk, 0, sizeof(uk));
2316 uk.family = k->family;
2317 uk.reserved = k->reserved;
2318 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2319 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2320
2321 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2322}
2323
8bafd730
AA		 2324static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma,
2325 int with_encp)
7deb2264
TG		 2326{
2327 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2328 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2329 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2330 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2331 + userpolicy_type_attrsize();
7deb2264
TG		 2332}
2333
183cad12
DM		 2334static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2335 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2336 const struct xfrm_selector *sel,
2337 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2338{
183cad12 2339 const struct xfrm_migrate *mp;
5c79de6e
SS		 2340 struct xfrm_userpolicy_id *pol_id;
2341 struct nlmsghdr *nlh;
1d1e34dd 2342 int i, err;
5c79de6e 2343
79b8b7f4
TG		 2344 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2345 if (nlh == NULL)
2346 return -EMSGSIZE;
5c79de6e 2347
7b67c857 2348 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2349 /* copy data from selector, dir, and type to the pol_id */
2350 memset(pol_id, 0, sizeof(*pol_id));
2351 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2352 pol_id->dir = dir;
2353
1d1e34dd
DM		 2354 if (k != NULL) {
2355 err = copy_to_user_kmaddress(k, skb);
2356 if (err)
2357 goto out_cancel;
2358 }
8bafd730
AA		 2359 if (encap) {
2360 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2361 if (err)
2362 goto out_cancel;
2363 }
1d1e34dd
DM		 2364 err = copy_to_user_policy_type(type, skb);
2365 if (err)
2366 goto out_cancel;
5c79de6e 2367 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2368 err = copy_to_user_migrate(mp, skb);
2369 if (err)
2370 goto out_cancel;
5c79de6e
SS		 2371 }
2372
053c095a
JB		 2373 nlmsg_end(skb, nlh);
2374 return 0;
1d1e34dd
DM		 2375
2376out_cancel:
9825069d 2377 nlmsg_cancel(skb, nlh);
1d1e34dd 2378 return err;
5c79de6e
SS		 2379}
2380
183cad12
DM		 2381static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2382 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2383 const struct xfrm_kmaddress *k,
2384 const struct xfrm_encap_tmpl *encap)
5c79de6e 2385{
a6483b79 2386 struct net *net = &init_net;
5c79de6e 2387 struct sk_buff *skb;
5c79de6e 2388
8bafd730
AA		 2389 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2390 GFP_ATOMIC);
5c79de6e
SS		 2391 if (skb == NULL)
2392 return -ENOMEM;
2393
2394 /* build migrate */
8bafd730 2395 if (build_migrate(skb, m, num_migrate, k, sel, encap, dir, type) < 0)
5c79de6e
SS		 2396 BUG();
2397
21ee543e 2398 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2399}
2400#else
183cad12
DM		 2401static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2402 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2403 const struct xfrm_kmaddress *k,
2404 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2405{
2406 return -ENOPROTOOPT;
2407}
2408#endif
d51d081d 2409
a7bd9a45 2410#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2411
2412static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2413 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2414 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2415 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2416 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2417 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2418 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2419 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2420 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2421 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2422 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2423 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2424 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2425 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2426 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2427 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2428 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2429 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2430 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2431 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2432 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2433 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2434};
2435
492b558b
TG		 2436#undef XMSGSIZE
2437
cf5cb79f 2438static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2439 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2440 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2441 [XFRMA_LASTUSED] = { .type = NLA_U64},
2442 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2443 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2444 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2445 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2446 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2447 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2448 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2449 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2450 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2451 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2452 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2453 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2454 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2455 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2456 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2457 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2458 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2459 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2460 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2461 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2462 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2463 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2464 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2465 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
077fbac4 2466 [XFRMA_OUTPUT_MARK] = { .len = NLA_U32 },
cf5cb79f
TG		 2467};
2468
880a6fab
CG		 2469static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2470 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2471 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2472};
2473
05600a79 2474static const struct xfrm_link {
5424f32e 2475 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2476 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2477 int (*done)(struct netlink_callback *);
880a6fab
CG		 2478 const struct nla_policy *nla_pol;
2479 int nla_max;
492b558b
TG		 2480} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2481 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2482 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2483 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2484 .dump = xfrm_dump_sa,
2485 .done = xfrm_dump_sa_done },
492b558b
TG		 2486 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2487 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2488 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2489 .dump = xfrm_dump_policy,
2490 .done = xfrm_dump_policy_done },
492b558b 2491 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2492 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2493 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2494 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2495 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2496 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2497 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2498 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2499 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2500 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2501 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2502 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2503 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2504 .nla_pol = xfrma_spd_policy,
2505 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2506 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2507};
2508
2d4bc933
JB		 2509static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2510 struct netlink_ext_ack *extack)
1da177e4 2511{
a6483b79 2512 struct net *net = sock_net(skb->sk);
35a7aa08 2513 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2514 const struct xfrm_link *link;
a7bd9a45 2515 int type, err;
1da177e4 2516
74005991 2517#ifdef CONFIG_COMPAT
2bf8c476 2518 if (in_compat_syscall())
83e2d058 2519 return -EOPNOTSUPP;
74005991
FD		 2520#endif
2521
1da177e4 2522 type = nlh->nlmsg_type;
1da177e4 2523 if (type > XFRM_MSG_MAX)
1d00a4eb 2524 return -EINVAL;
1da177e4
LT		 2525
2526 type -= XFRM_MSG_BASE;
2527 link = &xfrm_dispatch[type];
2528
2529 /* All operations require privileges, even GET */
90f62cf3 2530 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2531 return -EPERM;
1da177e4 2532
492b558b
TG		 2533 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2534 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2535 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2536 if (link->dump == NULL)
1d00a4eb 2537 return -EINVAL;
88fc2c84 2538
80d326fa
PNA		 2539 {
2540 struct netlink_dump_control c = {
2541 .dump = link->dump,
2542 .done = link->done,
2543 };
2544 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2545 }
1da177e4
LT		 2546 }
2547
880a6fab
CG		 2548 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2549 link->nla_max ? : XFRMA_MAX,
fe52145f 2550 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45
TG		 2551 if (err < 0)
2552 return err;
1da177e4
LT		 2553
2554 if (link->doit == NULL)
1d00a4eb 2555 return -EINVAL;
1da177e4 2556
5424f32e 2557 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2558}
2559
cd40b7d3 2560static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2561{
283bc9f3
FD		 2562 struct net *net = sock_net(skb->sk);
2563
2564 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2565 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2566 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2567}
2568
7deb2264
TG		 2569static inline size_t xfrm_expire_msgsize(void)
2570{
6f26b61e
JHS		 2571 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2572 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2573}
2574
214e005b 2575static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2576{
2577 struct xfrm_user_expire *ue;
2578 struct nlmsghdr *nlh;
1d1e34dd 2579 int err;
1da177e4 2580
15e47304 2581 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2582 if (nlh == NULL)
2583 return -EMSGSIZE;
1da177e4 2584
7b67c857 2585 ue = nlmsg_data(nlh);
1da177e4 2586 copy_to_user_state(x, &ue->state);
d51d081d 2587 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16
MK		 2588 /* clear the padding bytes */
2589 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
1da177e4 2590
1d1e34dd
DM		 2591 err = xfrm_mark_put(skb, &x->mark);
2592 if (err)
2593 return err;
6f26b61e 2594
053c095a
JB		 2595 nlmsg_end(skb, nlh);
2596 return 0;
1da177e4
LT		 2597}
2598
214e005b 2599static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2600{
fc34acd3 2601 struct net *net = xs_net(x);
1da177e4
LT		 2602 struct sk_buff *skb;
2603
7deb2264 2604 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2605 if (skb == NULL)
2606 return -ENOMEM;
2607
6f26b61e
JHS		 2608 if (build_expire(skb, x, c) < 0) {
2609 kfree_skb(skb);
2610 return -EMSGSIZE;
2611 }
1da177e4 2612
21ee543e 2613 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2614}
2615
214e005b 2616static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2617{
fc34acd3 2618 struct net *net = xs_net(x);
d51d081d 2619 struct sk_buff *skb;
d51d081d 2620
d8647b79 2621 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2622 if (skb == NULL)
2623 return -ENOMEM;
2624
2625 if (build_aevent(skb, x, c) < 0)
2626 BUG();
2627
21ee543e 2628 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2629}
2630
214e005b 2631static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2632{
7067802e 2633 struct net *net = c->net;
26b15dad
JHS		 2634 struct xfrm_usersa_flush *p;
2635 struct nlmsghdr *nlh;
2636 struct sk_buff *skb;
7deb2264 2637 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2638
7deb2264 2639 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2640 if (skb == NULL)
2641 return -ENOMEM;
26b15dad 2642
15e47304 2643 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2644 if (nlh == NULL) {
2645 kfree_skb(skb);
2646 return -EMSGSIZE;
2647 }
26b15dad 2648
7b67c857 2649 p = nlmsg_data(nlh);
bf08867f 2650 p->proto = c->data.proto;
26b15dad 2651
9825069d 2652 nlmsg_end(skb, nlh);
26b15dad 2653
21ee543e 2654 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2655}
2656
7deb2264 2657static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2658{
7deb2264 2659 size_t l = 0;
1a6509d9
HX		 2660 if (x->aead)
2661 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2662 if (x->aalg) {
2663 l += nla_total_size(sizeof(struct xfrm_algo) +
2664 (x->aalg->alg_key_len + 7) / 8);
2665 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2666 }
26b15dad 2667 if (x->ealg)
0f99be0d 2668 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2669 if (x->calg)
7deb2264 2670 l += nla_total_size(sizeof(*x->calg));
26b15dad 2671 if (x->encap)
7deb2264 2672 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2673 if (x->tfcpad)
2674 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2675 if (x->replay_esn)
2676 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2677 else
2678 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2679 if (x->security)
2680 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2681 x->security->ctx_len);
2682 if (x->coaddr)
2683 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2684 if (x->props.extra_flags)
2685 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 2686 if (x->xso.dev)
2687 l += nla_total_size(sizeof(x->xso));
077fbac4
LC		 2688 if (x->props.output_mark)
2689 l += nla_total_size(sizeof(x->props.output_mark));
68325d3b 2690
d26f3984 2691 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 2692 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 2693
2694 return l;
2695}
2696
214e005b 2697static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2698{
fc34acd3 2699 struct net *net = xs_net(x);
26b15dad 2700 struct xfrm_usersa_info *p;
0603eac0 2701 struct xfrm_usersa_id *id;
26b15dad
JHS		 2702 struct nlmsghdr *nlh;
2703 struct sk_buff *skb;
26b15dad 2704 int len = xfrm_sa_len(x);
1d1e34dd 2705 int headlen, err;
0603eac0
HX		 2706
2707 headlen = sizeof(*p);
2708 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2709 len += nla_total_size(headlen);
0603eac0 2710 headlen = sizeof(*id);
6f26b61e 2711 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2712 }
7deb2264 2713 len += NLMSG_ALIGN(headlen);
26b15dad 2714
7deb2264 2715 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2716 if (skb == NULL)
2717 return -ENOMEM;
26b15dad 2718
15e47304 2719 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2720 err = -EMSGSIZE;
79b8b7f4 2721 if (nlh == NULL)
1d1e34dd 2722 goto out_free_skb;
26b15dad 2723
7b67c857 2724 p = nlmsg_data(nlh);
0603eac0 2725 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2726 struct nlattr *attr;
2727
7b67c857 2728 id = nlmsg_data(nlh);
50329c8a 2729 memset(id, 0, sizeof(*id));
0603eac0
HX		 2730 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2731 id->spi = x->id.spi;
2732 id->family = x->props.family;
2733 id->proto = x->id.proto;
2734
c0144bea 2735 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2736 err = -EMSGSIZE;
c0144bea 2737 if (attr == NULL)
1d1e34dd 2738 goto out_free_skb;
c0144bea
TG		 2739
2740 p = nla_data(attr);
0603eac0 2741 }
1d1e34dd
DM		 2742 err = copy_to_user_state_extra(x, p, skb);
2743 if (err)
2744 goto out_free_skb;
26b15dad 2745
9825069d 2746 nlmsg_end(skb, nlh);
26b15dad 2747
21ee543e 2748 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2749
1d1e34dd 2750out_free_skb:
26b15dad 2751 kfree_skb(skb);
1d1e34dd 2752 return err;
26b15dad
JHS		 2753}
2754
214e005b 2755static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2756{
2757
2758 switch (c->event) {
f60f6b8f 2759 case XFRM_MSG_EXPIRE:
26b15dad 2760 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2761 case XFRM_MSG_NEWAE:
2762 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2763 case XFRM_MSG_DELSA:
2764 case XFRM_MSG_UPDSA:
2765 case XFRM_MSG_NEWSA:
26b15dad 2766 return xfrm_notify_sa(x, c);
f60f6b8f 2767 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2768 return xfrm_notify_sa_flush(c);
2769 default:
62db5cfd 2770 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2771 c->event);
2772 break;
26b15dad
JHS		 2773 }
2774
2775 return 0;
2776
2777}
2778
7deb2264
TG		 2779static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2780 struct xfrm_policy *xp)
2781{
2782 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2783 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2784 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2785 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2786 + userpolicy_type_attrsize();
2787}
2788
1da177e4 2789static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2790 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2791{
1d1e34dd 2792 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2793 struct xfrm_user_acquire *ua;
2794 struct nlmsghdr *nlh;
1d1e34dd 2795 int err;
1da177e4 2796
79b8b7f4
TG		 2797 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2798 if (nlh == NULL)
2799 return -EMSGSIZE;
1da177e4 2800
7b67c857 2801 ua = nlmsg_data(nlh);
1da177e4
LT		 2802 memcpy(&ua->id, &x->id, sizeof(ua->id));
2803 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2804 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2805 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2806 ua->aalgos = xt->aalgos;
2807 ua->ealgos = xt->ealgos;
2808 ua->calgos = xt->calgos;
2809 ua->seq = x->km.seq = seq;
2810
1d1e34dd
DM		 2811 err = copy_to_user_tmpl(xp, skb);
2812 if (!err)
2813 err = copy_to_user_state_sec_ctx(x, skb);
2814 if (!err)
2815 err = copy_to_user_policy_type(xp->type, skb);
2816 if (!err)
2817 err = xfrm_mark_put(skb, &xp->mark);
2818 if (err) {
2819 nlmsg_cancel(skb, nlh);
2820 return err;
2821 }
1da177e4 2822
053c095a
JB		 2823 nlmsg_end(skb, nlh);
2824 return 0;
1da177e4
LT		 2825}
2826
2827static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2828 struct xfrm_policy *xp)
1da177e4 2829{
a6483b79 2830 struct net *net = xs_net(x);
1da177e4 2831 struct sk_buff *skb;
1da177e4 2832
7deb2264 2833 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2834 if (skb == NULL)
2835 return -ENOMEM;
2836
65e0736b 2837 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2838 BUG();
2839
21ee543e 2840 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2841}
2842
2843/* User gives us xfrm_user_policy_info followed by an array of 0
2844 * or more templates.
2845 */
cb969f07 2846static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2847 u8 *data, int len, int *dir)
2848{
fc34acd3 2849 struct net *net = sock_net(sk);
1da177e4
LT		 2850 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2851 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2852 struct xfrm_policy *xp;
2853 int nr;
2854
cb969f07 2855 switch (sk->sk_family) {
1da177e4
LT		 2856 case AF_INET:
2857 if (opt != IP_XFRM_POLICY) {
2858 *dir = -EOPNOTSUPP;
2859 return NULL;
2860 }
2861 break;
dfd56b8b 2862#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2863 case AF_INET6:
2864 if (opt != IPV6_XFRM_POLICY) {
2865 *dir = -EOPNOTSUPP;
2866 return NULL;
2867 }
2868 break;
2869#endif
2870 default:
2871 *dir = -EINVAL;
2872 return NULL;
2873 }
2874
2875 *dir = -EINVAL;
2876
2877 if (len < sizeof(*p) ||
2878 verify_newpolicy_info(p))
2879 return NULL;
2880
2881 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2882 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2883 return NULL;
2884
a4f1bac6
HX		 2885 if (p->dir > XFRM_POLICY_OUT)
2886 return NULL;
2887
2f09a4d5 2888 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2889 if (xp == NULL) {
2890 *dir = -ENOBUFS;
2891 return NULL;
2892 }
2893
2894 copy_from_user_policy(xp, p);
f7b6983f 2895 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2896 copy_templates(xp, ut, nr);
2897
2898 *dir = p->dir;
2899
2900 return xp;
2901}
2902
7deb2264
TG		 2903static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2904{
2905 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2906 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2907 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2908 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2909 + userpolicy_type_attrsize();
2910}
2911
1da177e4 2912static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2913 int dir, const struct km_event *c)
1da177e4
LT		 2914{
2915 struct xfrm_user_polexpire *upe;
d51d081d 2916 int hard = c->data.hard;
1d1e34dd
DM		 2917 struct nlmsghdr *nlh;
2918 int err;
1da177e4 2919
15e47304 2920 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2921 if (nlh == NULL)
2922 return -EMSGSIZE;
1da177e4 2923
7b67c857 2924 upe = nlmsg_data(nlh);
1da177e4 2925 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2926 err = copy_to_user_tmpl(xp, skb);
2927 if (!err)
2928 err = copy_to_user_sec_ctx(xp, skb);
2929 if (!err)
2930 err = copy_to_user_policy_type(xp->type, skb);
2931 if (!err)
2932 err = xfrm_mark_put(skb, &xp->mark);
2933 if (err) {
2934 nlmsg_cancel(skb, nlh);
2935 return err;
2936 }
1da177e4
LT		 2937 upe->hard = !!hard;
2938
053c095a
JB		 2939 nlmsg_end(skb, nlh);
2940 return 0;
1da177e4
LT		 2941}
2942
214e005b 2943static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2944{
fc34acd3 2945 struct net *net = xp_net(xp);
1da177e4 2946 struct sk_buff *skb;
1da177e4 2947
7deb2264 2948 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2949 if (skb == NULL)
2950 return -ENOMEM;
2951
d51d081d 2952 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2953 BUG();
2954
21ee543e 2955 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2956}
2957
214e005b 2958static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2959{
1d1e34dd 2960 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2961 struct net *net = xp_net(xp);
26b15dad 2962 struct xfrm_userpolicy_info *p;
0603eac0 2963 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2964 struct nlmsghdr *nlh;
2965 struct sk_buff *skb;
1d1e34dd 2966 int headlen, err;
0603eac0
HX		 2967
2968 headlen = sizeof(*p);
2969 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2970 len += nla_total_size(headlen);
0603eac0
HX		 2971 headlen = sizeof(*id);
2972 }
cfbfd45a 2973 len += userpolicy_type_attrsize();
295fae56 2974 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2975 len += NLMSG_ALIGN(headlen);
26b15dad 2976
7deb2264 2977 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2978 if (skb == NULL)
2979 return -ENOMEM;
26b15dad 2980
15e47304 2981 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2982 err = -EMSGSIZE;
79b8b7f4 2983 if (nlh == NULL)
1d1e34dd 2984 goto out_free_skb;
26b15dad 2985
7b67c857 2986 p = nlmsg_data(nlh);
0603eac0 2987 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2988 struct nlattr *attr;
2989
7b67c857 2990 id = nlmsg_data(nlh);
0603eac0
HX		 2991 memset(id, 0, sizeof(*id));
2992 id->dir = dir;
2993 if (c->data.byid)
2994 id->index = xp->index;
2995 else
2996 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2997
c0144bea 2998 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2999 err = -EMSGSIZE;
c0144bea 3000 if (attr == NULL)
1d1e34dd 3001 goto out_free_skb;
c0144bea
TG		 3002
3003 p = nla_data(attr);
0603eac0 3004 }
26b15dad 3005
26b15dad 3006 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 3007 err = copy_to_user_tmpl(xp, skb);
3008 if (!err)
3009 err = copy_to_user_policy_type(xp->type, skb);
3010 if (!err)
3011 err = xfrm_mark_put(skb, &xp->mark);
3012 if (err)
3013 goto out_free_skb;
295fae56 3014
9825069d 3015 nlmsg_end(skb, nlh);
26b15dad 3016
21ee543e 3017 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3018
1d1e34dd 3019out_free_skb:
26b15dad 3020 kfree_skb(skb);
1d1e34dd 3021 return err;
26b15dad
JHS		 3022}
3023
214e005b 3024static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3025{
7067802e 3026 struct net *net = c->net;
26b15dad
JHS		 3027 struct nlmsghdr *nlh;
3028 struct sk_buff *skb;
1d1e34dd 3029 int err;
26b15dad 3030
7deb2264 3031 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3032 if (skb == NULL)
3033 return -ENOMEM;
26b15dad 3034
15e47304 3035 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3036 err = -EMSGSIZE;
79b8b7f4 3037 if (nlh == NULL)
1d1e34dd
DM		 3038 goto out_free_skb;
3039 err = copy_to_user_policy_type(c->data.type, skb);
3040 if (err)
3041 goto out_free_skb;
26b15dad 3042
9825069d 3043 nlmsg_end(skb, nlh);
26b15dad 3044
21ee543e 3045 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3046
1d1e34dd 3047out_free_skb:
26b15dad 3048 kfree_skb(skb);
1d1e34dd 3049 return err;
26b15dad
JHS		 3050}
3051
214e005b 3052static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3053{
3054
3055 switch (c->event) {
f60f6b8f
HX		 3056 case XFRM_MSG_NEWPOLICY:
3057 case XFRM_MSG_UPDPOLICY:
3058 case XFRM_MSG_DELPOLICY:
26b15dad 3059 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3060 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3061 return xfrm_notify_policy_flush(c);
f60f6b8f 3062 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3063 return xfrm_exp_policy_notify(xp, dir, c);
3064 default:
62db5cfd 3065 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3066 c->event);
26b15dad
JHS		 3067 }
3068
3069 return 0;
3070
3071}
3072
7deb2264
TG		 3073static inline size_t xfrm_report_msgsize(void)
3074{
3075 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3076}
3077
97a64b45
MN		 3078static int build_report(struct sk_buff *skb, u8 proto,
3079 struct xfrm_selector *sel, xfrm_address_t *addr)
3080{
3081 struct xfrm_user_report *ur;
3082 struct nlmsghdr *nlh;
97a64b45 3083
79b8b7f4
TG		 3084 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3085 if (nlh == NULL)
3086 return -EMSGSIZE;
97a64b45 3087
7b67c857 3088 ur = nlmsg_data(nlh);
97a64b45
MN		 3089 ur->proto = proto;
3090 memcpy(&ur->sel, sel, sizeof(ur->sel));
3091
1d1e34dd
DM		 3092 if (addr) {
3093 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3094 if (err) {
3095 nlmsg_cancel(skb, nlh);
3096 return err;
3097 }
3098 }
053c095a
JB		 3099 nlmsg_end(skb, nlh);
3100 return 0;
97a64b45
MN		 3101}
3102
db983c11
AD		 3103static int xfrm_send_report(struct net *net, u8 proto,
3104 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3105{
3106 struct sk_buff *skb;
97a64b45 3107
7deb2264 3108 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3109 if (skb == NULL)
3110 return -ENOMEM;
3111
3112 if (build_report(skb, proto, sel, addr) < 0)
3113 BUG();
3114
21ee543e 3115 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3116}
3117
3a2dfbe8
MW		 3118static inline size_t xfrm_mapping_msgsize(void)
3119{
3120 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3121}
3122
3123static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3124 xfrm_address_t *new_saddr, __be16 new_sport)
3125{
3126 struct xfrm_user_mapping *um;
3127 struct nlmsghdr *nlh;
3128
3129 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3130 if (nlh == NULL)
3131 return -EMSGSIZE;
3132
3133 um = nlmsg_data(nlh);
3134
3135 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3136 um->id.spi = x->id.spi;
3137 um->id.family = x->props.family;
3138 um->id.proto = x->id.proto;
3139 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3140 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3141 um->new_sport = new_sport;
3142 um->old_sport = x->encap->encap_sport;
3143 um->reqid = x->props.reqid;
3144
053c095a
JB		 3145 nlmsg_end(skb, nlh);
3146 return 0;
3a2dfbe8
MW		 3147}
3148
3149static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3150 __be16 sport)
3151{
a6483b79 3152 struct net *net = xs_net(x);
3a2dfbe8
MW		 3153 struct sk_buff *skb;
3154
3155 if (x->id.proto != IPPROTO_ESP)
3156 return -EINVAL;
3157
3158 if (!x->encap)
3159 return -EINVAL;
3160
3161 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3162 if (skb == NULL)
3163 return -ENOMEM;
3164
3165 if (build_mapping(skb, x, ipaddr, sport) < 0)
3166 BUG();
3167
21ee543e 3168 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3169}
3170
0f24558e
HG		 3171static bool xfrm_is_alive(const struct km_event *c)
3172{
3173 return (bool)xfrm_acquire_is_on(c->net);
3174}
3175
1da177e4 3176static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3177 .notify = xfrm_send_state_notify,
3178 .acquire = xfrm_send_acquire,
3179 .compile_policy = xfrm_compile_policy,
3180 .notify_policy = xfrm_send_policy_notify,
97a64b45 3181 .report = xfrm_send_report,
5c79de6e 3182 .migrate = xfrm_send_migrate,
3a2dfbe8 3183 .new_mapping = xfrm_send_mapping,
0f24558e 3184 .is_alive = xfrm_is_alive,
1da177e4
LT		 3185};
3186
a6483b79 3187static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3188{
be33690d 3189 struct sock *nlsk;
a31f2d17
PNA		 3190 struct netlink_kernel_cfg cfg = {
3191 .groups = XFRMNLGRP_MAX,
3192 .input = xfrm_netlink_rcv,
3193 };
be33690d 3194
9f00d977 3195 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3196 if (nlsk == NULL)
1da177e4 3197 return -ENOMEM;
d79d792e 3198 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3199 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3200 return 0;
3201}
3202
d79d792e 3203static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3204{
d79d792e
EB		 3205 struct net *net;
3206 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3207 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3208 synchronize_net();
3209 list_for_each_entry(net, net_exit_list, exit_list)
3210 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3211}
3212
a6483b79 3213static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3214 .init = xfrm_user_net_init,
3215 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3216};
3217
3218static int __init xfrm_user_init(void)
3219{
3220 int rv;
3221
3222 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3223
3224 rv = register_pernet_subsys(&xfrm_user_net_ops);
3225 if (rv < 0)
3226 return rv;
3227 rv = xfrm_register_km(&netlink_mgr);
3228 if (rv < 0)
3229 unregister_pernet_subsys(&xfrm_user_net_ops);
3230 return rv;
3231}
3232
3233static void __exit xfrm_user_exit(void)
3234{
3235 xfrm_unregister_km(&netlink_mgr);
3236 unregister_pernet_subsys(&xfrm_user_net_ops);
3237}
3238
1da177e4
LT		 3239module_init(xfrm_user_init);
3240module_exit(xfrm_user_exit);
3241MODULE_LICENSE("GPL");
4fdb3bb7 3242MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3243
Linux 6.x block layer and io_uring tree(s)