1 /* xfrm_user.c: User interface to configure xfrm engine.
7 * Kazunori MIYAZAWA @USAGI
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
30 #include <linux/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
34 #include <asm/unaligned.h>
36 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
38 struct nlattr *rt = attrs[type];
39 struct xfrm_algo *algp;
45 if (nla_len(rt) < (int)xfrm_alg_len(algp))
58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
62 static int verify_auth_trunc(struct nlattr **attrs)
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
71 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
78 static int verify_aead(struct nlattr **attrs)
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
87 if (nla_len(rt) < (int)aead_len(algp))
90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
94 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
97 struct nlattr *rt = attrs[type];
100 *addrp = nla_data(rt);
103 static inline int verify_sec_ctx_len(struct nlattr **attrs)
105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
106 struct xfrm_user_sec_ctx *uctx;
112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
118 static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
122 struct xfrm_replay_state_esn *rs;
125 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
129 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
132 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
133 nla_len(rt) != sizeof(*rs))
136 /* As only ESP and AH support ESN feature. */
137 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
140 if (p->replay_window != 0)
146 static int verify_newsa_info(struct xfrm_usersa_info *p,
147 struct nlattr **attrs)
154 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
160 #if IS_ENABLED(CONFIG_IPV6)
161 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
175 switch (p->id.proto) {
177 if ((!attrs[XFRMA_ALG_AUTH] &&
178 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
179 attrs[XFRMA_ALG_AEAD] ||
180 attrs[XFRMA_ALG_CRYPT] ||
181 attrs[XFRMA_ALG_COMP] ||
187 if (attrs[XFRMA_ALG_COMP])
189 if (!attrs[XFRMA_ALG_AUTH] &&
190 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
191 !attrs[XFRMA_ALG_CRYPT] &&
192 !attrs[XFRMA_ALG_AEAD])
194 if ((attrs[XFRMA_ALG_AUTH] ||
195 attrs[XFRMA_ALG_AUTH_TRUNC] ||
196 attrs[XFRMA_ALG_CRYPT]) &&
197 attrs[XFRMA_ALG_AEAD])
199 if (attrs[XFRMA_TFCPAD] &&
200 p->mode != XFRM_MODE_TUNNEL)
205 if (!attrs[XFRMA_ALG_COMP] ||
206 attrs[XFRMA_ALG_AEAD] ||
207 attrs[XFRMA_ALG_AUTH] ||
208 attrs[XFRMA_ALG_AUTH_TRUNC] ||
209 attrs[XFRMA_ALG_CRYPT] ||
210 attrs[XFRMA_TFCPAD] ||
211 (ntohl(p->id.spi) >= 0x10000))
215 #if IS_ENABLED(CONFIG_IPV6)
216 case IPPROTO_DSTOPTS:
217 case IPPROTO_ROUTING:
218 if (attrs[XFRMA_ALG_COMP] ||
219 attrs[XFRMA_ALG_AUTH] ||
220 attrs[XFRMA_ALG_AUTH_TRUNC] ||
221 attrs[XFRMA_ALG_AEAD] ||
222 attrs[XFRMA_ALG_CRYPT] ||
223 attrs[XFRMA_ENCAP] ||
224 attrs[XFRMA_SEC_CTX] ||
225 attrs[XFRMA_TFCPAD] ||
226 !attrs[XFRMA_COADDR])
235 if ((err = verify_aead(attrs)))
237 if ((err = verify_auth_trunc(attrs)))
239 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
241 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
243 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
245 if ((err = verify_sec_ctx_len(attrs)))
247 if ((err = verify_replay(p, attrs)))
252 case XFRM_MODE_TRANSPORT:
253 case XFRM_MODE_TUNNEL:
254 case XFRM_MODE_ROUTEOPTIMIZATION:
268 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
269 struct xfrm_algo_desc *(*get_byname)(const char *, int),
272 struct xfrm_algo *p, *ualg;
273 struct xfrm_algo_desc *algo;
278 ualg = nla_data(rta);
280 algo = get_byname(ualg->alg_name, 1);
283 *props = algo->desc.sadb_alg_id;
285 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
289 strcpy(p->alg_name, algo->name);
294 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
296 struct xfrm_algo *p, *ualg;
297 struct xfrm_algo_desc *algo;
302 ualg = nla_data(rta);
304 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
307 x->props.ealgo = algo->desc.sadb_alg_id;
309 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
313 strcpy(p->alg_name, algo->name);
315 x->geniv = algo->uinfo.encr.geniv;
319 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
322 struct xfrm_algo *ualg;
323 struct xfrm_algo_auth *p;
324 struct xfrm_algo_desc *algo;
329 ualg = nla_data(rta);
331 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
334 *props = algo->desc.sadb_alg_id;
336 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
340 strcpy(p->alg_name, algo->name);
341 p->alg_key_len = ualg->alg_key_len;
342 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
343 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
349 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
352 struct xfrm_algo_auth *p, *ualg;
353 struct xfrm_algo_desc *algo;
358 ualg = nla_data(rta);
360 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
363 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
365 *props = algo->desc.sadb_alg_id;
367 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
371 strcpy(p->alg_name, algo->name);
372 if (!p->alg_trunc_len)
373 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
379 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
381 struct xfrm_algo_aead *p, *ualg;
382 struct xfrm_algo_desc *algo;
387 ualg = nla_data(rta);
389 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
392 x->props.ealgo = algo->desc.sadb_alg_id;
394 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
398 strcpy(p->alg_name, algo->name);
400 x->geniv = algo->uinfo.aead.geniv;
404 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
407 struct xfrm_replay_state_esn *up;
410 if (!replay_esn || !rp)
414 ulen = xfrm_replay_state_esn_len(up);
416 /* Check the overall length and the internal bitmap length to avoid
417 * potential overflow. */
418 if (nla_len(rp) < (int)ulen ||
419 xfrm_replay_state_esn_len(replay_esn) != ulen ||
420 replay_esn->bmp_len != up->bmp_len)
423 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
429 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
430 struct xfrm_replay_state_esn **preplay_esn,
433 struct xfrm_replay_state_esn *p, *pp, *up;
434 unsigned int klen, ulen;
440 klen = xfrm_replay_state_esn_len(up);
441 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
443 p = kzalloc(klen, GFP_KERNEL);
447 pp = kzalloc(klen, GFP_KERNEL);
454 memcpy(pp, up, ulen);
462 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
464 unsigned int len = 0;
467 len += sizeof(struct xfrm_user_sec_ctx);
468 len += xfrm_ctx->ctx_len;
473 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
475 memcpy(&x->id, &p->id, sizeof(x->id));
476 memcpy(&x->sel, &p->sel, sizeof(x->sel));
477 memcpy(&x->lft, &p->lft, sizeof(x->lft));
478 x->props.mode = p->mode;
479 x->props.replay_window = min_t(unsigned int, p->replay_window,
480 sizeof(x->replay.bitmap) * 8);
481 x->props.reqid = p->reqid;
482 x->props.family = p->family;
483 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
484 x->props.flags = p->flags;
486 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
487 x->sel.family = p->family;
491 * someday when pfkey also has support, we could have the code
492 * somehow made shareable and move it to xfrm_state.c - JHS
495 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
498 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
499 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
500 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
501 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
502 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
505 struct xfrm_replay_state_esn *replay_esn;
506 replay_esn = nla_data(re);
507 memcpy(x->replay_esn, replay_esn,
508 xfrm_replay_state_esn_len(replay_esn));
509 memcpy(x->preplay_esn, replay_esn,
510 xfrm_replay_state_esn_len(replay_esn));
514 struct xfrm_replay_state *replay;
515 replay = nla_data(rp);
516 memcpy(&x->replay, replay, sizeof(*replay));
517 memcpy(&x->preplay, replay, sizeof(*replay));
521 struct xfrm_lifetime_cur *ltime;
522 ltime = nla_data(lt);
523 x->curlft.bytes = ltime->bytes;
524 x->curlft.packets = ltime->packets;
525 x->curlft.add_time = ltime->add_time;
526 x->curlft.use_time = ltime->use_time;
530 x->replay_maxage = nla_get_u32(et);
533 x->replay_maxdiff = nla_get_u32(rt);
536 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
538 if (attrs[XFRMA_SET_MARK]) {
539 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
540 if (attrs[XFRMA_SET_MARK_MASK])
541 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
549 static struct xfrm_state *xfrm_state_construct(struct net *net,
550 struct xfrm_usersa_info *p,
551 struct nlattr **attrs,
554 struct xfrm_state *x = xfrm_state_alloc(net);
560 copy_from_user_state(x, p);
562 if (attrs[XFRMA_SA_EXTRA_FLAGS])
563 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
565 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
567 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
568 attrs[XFRMA_ALG_AUTH_TRUNC])))
570 if (!x->props.aalgo) {
571 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
572 attrs[XFRMA_ALG_AUTH])))
575 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
577 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
578 xfrm_calg_get_byname,
579 attrs[XFRMA_ALG_COMP])))
582 if (attrs[XFRMA_ENCAP]) {
583 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
584 sizeof(*x->encap), GFP_KERNEL);
585 if (x->encap == NULL)
589 if (attrs[XFRMA_TFCPAD])
590 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
592 if (attrs[XFRMA_COADDR]) {
593 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
594 sizeof(*x->coaddr), GFP_KERNEL);
595 if (x->coaddr == NULL)
599 xfrm_mark_get(attrs, &x->mark);
601 xfrm_smark_init(attrs, &x->props.smark);
603 if (attrs[XFRMA_IF_ID])
604 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
606 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
610 if (attrs[XFRMA_SEC_CTX]) {
611 err = security_xfrm_state_alloc(x,
612 nla_data(attrs[XFRMA_SEC_CTX]));
617 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
618 attrs[XFRMA_REPLAY_ESN_VAL])))
622 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
623 /* sysctl_xfrm_aevent_etime is in 100ms units */
624 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
626 if ((err = xfrm_init_replay(x)))
629 /* override default values from above */
630 xfrm_update_ae_params(x, attrs, 0);
632 /* configure the hardware if offload is requested */
633 if (attrs[XFRMA_OFFLOAD_DEV]) {
634 err = xfrm_dev_state_add(net, x,
635 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
643 x->km.state = XFRM_STATE_DEAD;
650 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
651 struct nlattr **attrs)
653 struct net *net = sock_net(skb->sk);
654 struct xfrm_usersa_info *p = nlmsg_data(nlh);
655 struct xfrm_state *x;
659 err = verify_newsa_info(p, attrs);
663 x = xfrm_state_construct(net, p, attrs, &err);
668 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
669 err = xfrm_state_add(x);
671 err = xfrm_state_update(x);
673 xfrm_audit_state_add(x, err ? 0 : 1, true);
676 x->km.state = XFRM_STATE_DEAD;
677 xfrm_dev_state_delete(x);
682 if (x->km.state == XFRM_STATE_VOID)
683 x->km.state = XFRM_STATE_VALID;
685 c.seq = nlh->nlmsg_seq;
686 c.portid = nlh->nlmsg_pid;
687 c.event = nlh->nlmsg_type;
689 km_state_notify(x, &c);
695 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
696 struct xfrm_usersa_id *p,
697 struct nlattr **attrs,
700 struct xfrm_state *x = NULL;
703 u32 mark = xfrm_mark_get(attrs, &m);
705 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
707 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
709 xfrm_address_t *saddr = NULL;
711 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
718 x = xfrm_state_lookup_byaddr(net, mark,
720 p->proto, p->family);
729 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
730 struct nlattr **attrs)
732 struct net *net = sock_net(skb->sk);
733 struct xfrm_state *x;
736 struct xfrm_usersa_id *p = nlmsg_data(nlh);
738 x = xfrm_user_state_lookup(net, p, attrs, &err);
742 if ((err = security_xfrm_state_delete(x)) != 0)
745 if (xfrm_state_kern(x)) {
750 err = xfrm_state_delete(x);
755 c.seq = nlh->nlmsg_seq;
756 c.portid = nlh->nlmsg_pid;
757 c.event = nlh->nlmsg_type;
758 km_state_notify(x, &c);
761 xfrm_audit_state_delete(x, err ? 0 : 1, true);
766 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
768 memset(p, 0, sizeof(*p));
769 memcpy(&p->id, &x->id, sizeof(p->id));
770 memcpy(&p->sel, &x->sel, sizeof(p->sel));
771 memcpy(&p->lft, &x->lft, sizeof(p->lft));
772 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
773 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
774 put_unaligned(x->stats.replay, &p->stats.replay);
775 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
776 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
777 p->mode = x->props.mode;
778 p->replay_window = x->props.replay_window;
779 p->reqid = x->props.reqid;
780 p->family = x->props.family;
781 p->flags = x->props.flags;
785 struct xfrm_dump_info {
786 struct sk_buff *in_skb;
787 struct sk_buff *out_skb;
792 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
794 struct xfrm_user_sec_ctx *uctx;
796 int ctx_size = sizeof(*uctx) + s->ctx_len;
798 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
802 uctx = nla_data(attr);
803 uctx->exttype = XFRMA_SEC_CTX;
804 uctx->len = ctx_size;
805 uctx->ctx_doi = s->ctx_doi;
806 uctx->ctx_alg = s->ctx_alg;
807 uctx->ctx_len = s->ctx_len;
808 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
813 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
815 struct xfrm_user_offload *xuo;
818 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
822 xuo = nla_data(attr);
823 memset(xuo, 0, sizeof(*xuo));
824 xuo->ifindex = xso->dev->ifindex;
825 xuo->flags = xso->flags;
830 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
832 struct xfrm_algo *algo;
835 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
836 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
840 algo = nla_data(nla);
841 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
842 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
843 algo->alg_key_len = auth->alg_key_len;
848 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
853 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
855 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
860 /* Don't change this without updating xfrm_sa_len! */
861 static int copy_to_user_state_extra(struct xfrm_state *x,
862 struct xfrm_usersa_info *p,
867 copy_to_user_state(x, p);
869 if (x->props.extra_flags) {
870 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
871 x->props.extra_flags);
877 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
882 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
888 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
893 ret = copy_to_user_auth(x->aalg, skb);
895 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
896 xfrm_alg_auth_len(x->aalg), x->aalg);
901 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
906 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
911 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
916 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
920 ret = xfrm_mark_put(skb, &x->mark);
924 ret = xfrm_smark_put(skb, &x->props.smark);
929 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
930 xfrm_replay_state_esn_len(x->replay_esn),
933 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
938 ret = copy_user_offload(&x->xso, skb);
942 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
947 ret = copy_sec_ctx(x->security, skb);
952 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
954 struct xfrm_dump_info *sp = ptr;
955 struct sk_buff *in_skb = sp->in_skb;
956 struct sk_buff *skb = sp->out_skb;
957 struct xfrm_usersa_info *p;
958 struct nlmsghdr *nlh;
961 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
962 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
968 err = copy_to_user_state_extra(x, p, skb);
970 nlmsg_cancel(skb, nlh);
977 static int xfrm_dump_sa_done(struct netlink_callback *cb)
979 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
980 struct sock *sk = cb->skb->sk;
981 struct net *net = sock_net(sk);
984 xfrm_state_walk_done(walk, net);
988 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
989 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
991 struct net *net = sock_net(skb->sk);
992 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
993 struct xfrm_dump_info info;
995 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
996 sizeof(cb->args) - sizeof(cb->args[0]));
998 info.in_skb = cb->skb;
1000 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1001 info.nlmsg_flags = NLM_F_MULTI;
1004 struct nlattr *attrs[XFRMA_MAX+1];
1005 struct xfrm_address_filter *filter = NULL;
1009 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
1014 if (attrs[XFRMA_ADDRESS_FILTER]) {
1015 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1016 sizeof(*filter), GFP_KERNEL);
1021 if (attrs[XFRMA_PROTO])
1022 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1024 xfrm_state_walk_init(walk, proto, filter);
1028 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1033 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1034 struct xfrm_state *x, u32 seq)
1036 struct xfrm_dump_info info;
1037 struct sk_buff *skb;
1040 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1042 return ERR_PTR(-ENOMEM);
1044 info.in_skb = in_skb;
1046 info.nlmsg_seq = seq;
1047 info.nlmsg_flags = 0;
1049 err = dump_one_state(x, 0, &info);
1052 return ERR_PTR(err);
1058 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1059 * Must be called with RCU read lock.
1061 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1062 u32 pid, unsigned int group)
1064 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1071 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1074 static inline unsigned int xfrm_spdinfo_msgsize(void)
1076 return NLMSG_ALIGN(4)
1077 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1078 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1079 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1080 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1083 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1084 u32 portid, u32 seq, u32 flags)
1086 struct xfrmk_spdinfo si;
1087 struct xfrmu_spdinfo spc;
1088 struct xfrmu_spdhinfo sph;
1089 struct xfrmu_spdhthresh spt4, spt6;
1090 struct nlmsghdr *nlh;
1095 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1096 if (nlh == NULL) /* shouldn't really happen ... */
1099 f = nlmsg_data(nlh);
1101 xfrm_spd_getinfo(net, &si);
1102 spc.incnt = si.incnt;
1103 spc.outcnt = si.outcnt;
1104 spc.fwdcnt = si.fwdcnt;
1105 spc.inscnt = si.inscnt;
1106 spc.outscnt = si.outscnt;
1107 spc.fwdscnt = si.fwdscnt;
1108 sph.spdhcnt = si.spdhcnt;
1109 sph.spdhmcnt = si.spdhmcnt;
1112 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1114 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1115 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1116 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1117 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1118 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1120 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1122 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1124 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1126 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1128 nlmsg_cancel(skb, nlh);
1132 nlmsg_end(skb, nlh);
1136 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1137 struct nlattr **attrs)
1139 struct net *net = sock_net(skb->sk);
1140 struct xfrmu_spdhthresh *thresh4 = NULL;
1141 struct xfrmu_spdhthresh *thresh6 = NULL;
1143 /* selector prefixlen thresholds to hash policies */
1144 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1145 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1147 if (nla_len(rta) < sizeof(*thresh4))
1149 thresh4 = nla_data(rta);
1150 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1153 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1154 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1156 if (nla_len(rta) < sizeof(*thresh6))
1158 thresh6 = nla_data(rta);
1159 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1163 if (thresh4 || thresh6) {
1164 write_seqlock(&net->xfrm.policy_hthresh.lock);
1166 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1167 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1170 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1171 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1173 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1175 xfrm_policy_hash_rebuild(net);
1181 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1182 struct nlattr **attrs)
1184 struct net *net = sock_net(skb->sk);
1185 struct sk_buff *r_skb;
1186 u32 *flags = nlmsg_data(nlh);
1187 u32 sportid = NETLINK_CB(skb).portid;
1188 u32 seq = nlh->nlmsg_seq;
1191 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1195 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1198 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1201 static inline unsigned int xfrm_sadinfo_msgsize(void)
1203 return NLMSG_ALIGN(4)
1204 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1205 + nla_total_size(4); /* XFRMA_SAD_CNT */
1208 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1209 u32 portid, u32 seq, u32 flags)
1211 struct xfrmk_sadinfo si;
1212 struct xfrmu_sadhinfo sh;
1213 struct nlmsghdr *nlh;
1217 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1218 if (nlh == NULL) /* shouldn't really happen ... */
1221 f = nlmsg_data(nlh);
1223 xfrm_sad_getinfo(net, &si);
1225 sh.sadhmcnt = si.sadhmcnt;
1226 sh.sadhcnt = si.sadhcnt;
1228 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1230 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1232 nlmsg_cancel(skb, nlh);
1236 nlmsg_end(skb, nlh);
1240 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1241 struct nlattr **attrs)
1243 struct net *net = sock_net(skb->sk);
1244 struct sk_buff *r_skb;
1245 u32 *flags = nlmsg_data(nlh);
1246 u32 sportid = NETLINK_CB(skb).portid;
1247 u32 seq = nlh->nlmsg_seq;
1250 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1254 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1257 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1260 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1261 struct nlattr **attrs)
1263 struct net *net = sock_net(skb->sk);
1264 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1265 struct xfrm_state *x;
1266 struct sk_buff *resp_skb;
1269 x = xfrm_user_state_lookup(net, p, attrs, &err);
1273 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1274 if (IS_ERR(resp_skb)) {
1275 err = PTR_ERR(resp_skb);
1277 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1284 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1285 struct nlattr **attrs)
1287 struct net *net = sock_net(skb->sk);
1288 struct xfrm_state *x;
1289 struct xfrm_userspi_info *p;
1290 struct sk_buff *resp_skb;
1291 xfrm_address_t *daddr;
1298 p = nlmsg_data(nlh);
1299 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1303 family = p->info.family;
1304 daddr = &p->info.id.daddr;
1308 mark = xfrm_mark_get(attrs, &m);
1310 if (attrs[XFRMA_IF_ID])
1311 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1314 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1315 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1322 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1323 if_id, p->info.id.proto, daddr,
1330 err = xfrm_alloc_spi(x, p->min, p->max);
1334 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1335 if (IS_ERR(resp_skb)) {
1336 err = PTR_ERR(resp_skb);
1340 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1348 static int verify_policy_dir(u8 dir)
1351 case XFRM_POLICY_IN:
1352 case XFRM_POLICY_OUT:
1353 case XFRM_POLICY_FWD:
1363 static int verify_policy_type(u8 type)
1366 case XFRM_POLICY_TYPE_MAIN:
1367 #ifdef CONFIG_XFRM_SUB_POLICY
1368 case XFRM_POLICY_TYPE_SUB:
1379 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1384 case XFRM_SHARE_ANY:
1385 case XFRM_SHARE_SESSION:
1386 case XFRM_SHARE_USER:
1387 case XFRM_SHARE_UNIQUE:
1394 switch (p->action) {
1395 case XFRM_POLICY_ALLOW:
1396 case XFRM_POLICY_BLOCK:
1403 switch (p->sel.family) {
1405 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1411 #if IS_ENABLED(CONFIG_IPV6)
1412 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1417 return -EAFNOSUPPORT;
1424 ret = verify_policy_dir(p->dir);
1427 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1433 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1435 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1436 struct xfrm_user_sec_ctx *uctx;
1441 uctx = nla_data(rt);
1442 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1445 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1451 for (i = 0; i < nr; i++, ut++) {
1452 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1454 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1455 memcpy(&t->saddr, &ut->saddr,
1456 sizeof(xfrm_address_t));
1457 t->reqid = ut->reqid;
1459 t->share = ut->share;
1460 t->optional = ut->optional;
1461 t->aalgos = ut->aalgos;
1462 t->ealgos = ut->ealgos;
1463 t->calgos = ut->calgos;
1464 /* If all masks are ~0, then we allow all algorithms. */
1465 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1466 t->encap_family = ut->family;
1470 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1475 if (nr > XFRM_MAX_DEPTH)
1478 prev_family = family;
1480 for (i = 0; i < nr; i++) {
1481 /* We never validated the ut->family value, so many
1482 * applications simply leave it at zero. The check was
1483 * never made and ut->family was ignored because all
1484 * templates could be assumed to have the same family as
1485 * the policy itself. Now that we will have ipv4-in-ipv6
1486 * and ipv6-in-ipv4 tunnels, this is no longer true.
1489 ut[i].family = family;
1491 if ((ut[i].mode == XFRM_MODE_TRANSPORT) &&
1492 (ut[i].family != prev_family))
1495 if (ut[i].mode >= XFRM_MODE_MAX)
1498 prev_family = ut[i].family;
1500 switch (ut[i].family) {
1503 #if IS_ENABLED(CONFIG_IPV6)
1511 switch (ut[i].id.proto) {
1515 #if IS_ENABLED(CONFIG_IPV6)
1516 case IPPROTO_ROUTING:
1517 case IPPROTO_DSTOPTS:
1519 case IPSEC_PROTO_ANY:
1530 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1532 struct nlattr *rt = attrs[XFRMA_TMPL];
1537 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1538 int nr = nla_len(rt) / sizeof(*utmpl);
1541 err = validate_tmpl(nr, utmpl, pol->family);
1545 copy_templates(pol, utmpl, nr);
1550 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1552 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1553 struct xfrm_userpolicy_type *upt;
1554 u8 type = XFRM_POLICY_TYPE_MAIN;
1562 err = verify_policy_type(type);
1570 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1572 xp->priority = p->priority;
1573 xp->index = p->index;
1574 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1575 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1576 xp->action = p->action;
1577 xp->flags = p->flags;
1578 xp->family = p->sel.family;
1579 /* XXX xp->share = p->share; */
1582 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1584 memset(p, 0, sizeof(*p));
1585 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1586 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1587 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1588 p->priority = xp->priority;
1589 p->index = xp->index;
1590 p->sel.family = xp->family;
1592 p->action = xp->action;
1593 p->flags = xp->flags;
1594 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1597 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1599 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1607 copy_from_user_policy(xp, p);
1609 err = copy_from_user_policy_type(&xp->type, attrs);
1613 if (!(err = copy_from_user_tmpl(xp, attrs)))
1614 err = copy_from_user_sec_ctx(xp, attrs);
1618 xfrm_mark_get(attrs, &xp->mark);
1620 if (attrs[XFRMA_IF_ID])
1621 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1627 xfrm_policy_destroy(xp);
1631 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1632 struct nlattr **attrs)
1634 struct net *net = sock_net(skb->sk);
1635 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1636 struct xfrm_policy *xp;
1641 err = verify_newpolicy_info(p);
1644 err = verify_sec_ctx_len(attrs);
1648 xp = xfrm_policy_construct(net, p, attrs, &err);
1652 /* shouldn't excl be based on nlh flags??
1653 * Aha! this is anti-netlink really i.e more pfkey derived
1654 * in netlink excl is a flag and you wouldnt need
1655 * a type XFRM_MSG_UPDPOLICY - JHS */
1656 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1657 err = xfrm_policy_insert(p->dir, xp, excl);
1658 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1661 security_xfrm_policy_free(xp->security);
1666 c.event = nlh->nlmsg_type;
1667 c.seq = nlh->nlmsg_seq;
1668 c.portid = nlh->nlmsg_pid;
1669 km_policy_notify(xp, p->dir, &c);
1676 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1678 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1681 if (xp->xfrm_nr == 0)
1684 for (i = 0; i < xp->xfrm_nr; i++) {
1685 struct xfrm_user_tmpl *up = &vec[i];
1686 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1688 memset(up, 0, sizeof(*up));
1689 memcpy(&up->id, &kp->id, sizeof(up->id));
1690 up->family = kp->encap_family;
1691 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1692 up->reqid = kp->reqid;
1693 up->mode = kp->mode;
1694 up->share = kp->share;
1695 up->optional = kp->optional;
1696 up->aalgos = kp->aalgos;
1697 up->ealgos = kp->ealgos;
1698 up->calgos = kp->calgos;
1701 return nla_put(skb, XFRMA_TMPL,
1702 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1705 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1708 return copy_sec_ctx(x->security, skb);
1713 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1716 return copy_sec_ctx(xp->security, skb);
1719 static inline unsigned int userpolicy_type_attrsize(void)
1721 #ifdef CONFIG_XFRM_SUB_POLICY
1722 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1728 #ifdef CONFIG_XFRM_SUB_POLICY
1729 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1731 struct xfrm_userpolicy_type upt;
1733 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1734 memset(&upt, 0, sizeof(upt));
1737 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1741 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1747 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1749 struct xfrm_dump_info *sp = ptr;
1750 struct xfrm_userpolicy_info *p;
1751 struct sk_buff *in_skb = sp->in_skb;
1752 struct sk_buff *skb = sp->out_skb;
1753 struct nlmsghdr *nlh;
1756 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1757 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1761 p = nlmsg_data(nlh);
1762 copy_to_user_policy(xp, p, dir);
1763 err = copy_to_user_tmpl(xp, skb);
1765 err = copy_to_user_sec_ctx(xp, skb);
1767 err = copy_to_user_policy_type(xp->type, skb);
1769 err = xfrm_mark_put(skb, &xp->mark);
1771 err = xfrm_if_id_put(skb, xp->if_id);
1773 nlmsg_cancel(skb, nlh);
1776 nlmsg_end(skb, nlh);
1780 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1782 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1783 struct net *net = sock_net(cb->skb->sk);
1785 xfrm_policy_walk_done(walk, net);
1789 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1791 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1793 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1795 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1799 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1801 struct net *net = sock_net(skb->sk);
1802 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1803 struct xfrm_dump_info info;
1805 info.in_skb = cb->skb;
1807 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1808 info.nlmsg_flags = NLM_F_MULTI;
1810 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1815 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1816 struct xfrm_policy *xp,
1819 struct xfrm_dump_info info;
1820 struct sk_buff *skb;
1823 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1825 return ERR_PTR(-ENOMEM);
1827 info.in_skb = in_skb;
1829 info.nlmsg_seq = seq;
1830 info.nlmsg_flags = 0;
1832 err = dump_one_policy(xp, dir, 0, &info);
1835 return ERR_PTR(err);
1841 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1842 struct nlattr **attrs)
1844 struct net *net = sock_net(skb->sk);
1845 struct xfrm_policy *xp;
1846 struct xfrm_userpolicy_id *p;
1847 u8 type = XFRM_POLICY_TYPE_MAIN;
1852 u32 mark = xfrm_mark_get(attrs, &m);
1855 p = nlmsg_data(nlh);
1856 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1858 err = copy_from_user_policy_type(&type, attrs);
1862 err = verify_policy_dir(p->dir);
1866 if (attrs[XFRMA_IF_ID])
1867 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1870 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1872 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1873 struct xfrm_sec_ctx *ctx;
1875 err = verify_sec_ctx_len(attrs);
1881 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1883 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1887 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1889 security_xfrm_policy_free(ctx);
1895 struct sk_buff *resp_skb;
1897 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1898 if (IS_ERR(resp_skb)) {
1899 err = PTR_ERR(resp_skb);
1901 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1902 NETLINK_CB(skb).portid);
1905 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1910 c.data.byid = p->index;
1911 c.event = nlh->nlmsg_type;
1912 c.seq = nlh->nlmsg_seq;
1913 c.portid = nlh->nlmsg_pid;
1914 km_policy_notify(xp, p->dir, &c);
1922 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1923 struct nlattr **attrs)
1925 struct net *net = sock_net(skb->sk);
1927 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1930 err = xfrm_state_flush(net, p->proto, true);
1932 if (err == -ESRCH) /* empty table */
1936 c.data.proto = p->proto;
1937 c.event = nlh->nlmsg_type;
1938 c.seq = nlh->nlmsg_seq;
1939 c.portid = nlh->nlmsg_pid;
1941 km_state_notify(NULL, &c);
1946 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
1948 unsigned int replay_size = x->replay_esn ?
1949 xfrm_replay_state_esn_len(x->replay_esn) :
1950 sizeof(struct xfrm_replay_state);
1952 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1953 + nla_total_size(replay_size)
1954 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1955 + nla_total_size(sizeof(struct xfrm_mark))
1956 + nla_total_size(4) /* XFRM_AE_RTHR */
1957 + nla_total_size(4); /* XFRM_AE_ETHR */
1960 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1962 struct xfrm_aevent_id *id;
1963 struct nlmsghdr *nlh;
1966 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1970 id = nlmsg_data(nlh);
1971 memset(&id->sa_id, 0, sizeof(id->sa_id));
1972 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1973 id->sa_id.spi = x->id.spi;
1974 id->sa_id.family = x->props.family;
1975 id->sa_id.proto = x->id.proto;
1976 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1977 id->reqid = x->props.reqid;
1978 id->flags = c->data.aevent;
1980 if (x->replay_esn) {
1981 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1982 xfrm_replay_state_esn_len(x->replay_esn),
1985 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1990 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1995 if (id->flags & XFRM_AE_RTHR) {
1996 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2000 if (id->flags & XFRM_AE_ETHR) {
2001 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2002 x->replay_maxage * 10 / HZ);
2006 err = xfrm_mark_put(skb, &x->mark);
2010 err = xfrm_if_id_put(skb, x->if_id);
2014 nlmsg_end(skb, nlh);
2018 nlmsg_cancel(skb, nlh);
2022 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2023 struct nlattr **attrs)
2025 struct net *net = sock_net(skb->sk);
2026 struct xfrm_state *x;
2027 struct sk_buff *r_skb;
2032 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2033 struct xfrm_usersa_id *id = &p->sa_id;
2035 mark = xfrm_mark_get(attrs, &m);
2037 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2041 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2042 if (r_skb == NULL) {
2048 * XXX: is this lock really needed - none of the other
2049 * gets lock (the concern is things getting updated
2050 * while we are still reading) - jhs
2052 spin_lock_bh(&x->lock);
2053 c.data.aevent = p->flags;
2054 c.seq = nlh->nlmsg_seq;
2055 c.portid = nlh->nlmsg_pid;
2057 err = build_aevent(r_skb, x, &c);
2060 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2061 spin_unlock_bh(&x->lock);
2066 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2067 struct nlattr **attrs)
2069 struct net *net = sock_net(skb->sk);
2070 struct xfrm_state *x;
2075 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2076 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2077 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2078 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2079 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2080 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2082 if (!lt && !rp && !re && !et && !rt)
2085 /* pedantic mode - thou shalt sayeth replaceth */
2086 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2089 mark = xfrm_mark_get(attrs, &m);
2091 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2095 if (x->km.state != XFRM_STATE_VALID)
2098 err = xfrm_replay_verify_len(x->replay_esn, re);
2102 spin_lock_bh(&x->lock);
2103 xfrm_update_ae_params(x, attrs, 1);
2104 spin_unlock_bh(&x->lock);
2106 c.event = nlh->nlmsg_type;
2107 c.seq = nlh->nlmsg_seq;
2108 c.portid = nlh->nlmsg_pid;
2109 c.data.aevent = XFRM_AE_CU;
2110 km_state_notify(x, &c);
2117 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2118 struct nlattr **attrs)
2120 struct net *net = sock_net(skb->sk);
2122 u8 type = XFRM_POLICY_TYPE_MAIN;
2125 err = copy_from_user_policy_type(&type, attrs);
2129 err = xfrm_policy_flush(net, type, true);
2131 if (err == -ESRCH) /* empty table */
2137 c.event = nlh->nlmsg_type;
2138 c.seq = nlh->nlmsg_seq;
2139 c.portid = nlh->nlmsg_pid;
2141 km_policy_notify(NULL, 0, &c);
2145 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2146 struct nlattr **attrs)
2148 struct net *net = sock_net(skb->sk);
2149 struct xfrm_policy *xp;
2150 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2151 struct xfrm_userpolicy_info *p = &up->pol;
2152 u8 type = XFRM_POLICY_TYPE_MAIN;
2155 u32 mark = xfrm_mark_get(attrs, &m);
2158 err = copy_from_user_policy_type(&type, attrs);
2162 err = verify_policy_dir(p->dir);
2166 if (attrs[XFRMA_IF_ID])
2167 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2170 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2172 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2173 struct xfrm_sec_ctx *ctx;
2175 err = verify_sec_ctx_len(attrs);
2181 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2183 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2187 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2188 &p->sel, ctx, 0, &err);
2189 security_xfrm_policy_free(ctx);
2194 if (unlikely(xp->walk.dead))
2199 xfrm_policy_delete(xp, p->dir);
2200 xfrm_audit_policy_delete(xp, 1, true);
2202 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2209 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2210 struct nlattr **attrs)
2212 struct net *net = sock_net(skb->sk);
2213 struct xfrm_state *x;
2215 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2216 struct xfrm_usersa_info *p = &ue->state;
2218 u32 mark = xfrm_mark_get(attrs, &m);
2220 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2226 spin_lock_bh(&x->lock);
2228 if (x->km.state != XFRM_STATE_VALID)
2230 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2233 __xfrm_state_delete(x);
2234 xfrm_audit_state_delete(x, 1, true);
2238 spin_unlock_bh(&x->lock);
2243 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2244 struct nlattr **attrs)
2246 struct net *net = sock_net(skb->sk);
2247 struct xfrm_policy *xp;
2248 struct xfrm_user_tmpl *ut;
2250 struct nlattr *rt = attrs[XFRMA_TMPL];
2251 struct xfrm_mark mark;
2253 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2254 struct xfrm_state *x = xfrm_state_alloc(net);
2260 xfrm_mark_get(attrs, &mark);
2262 err = verify_newpolicy_info(&ua->policy);
2267 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2271 memcpy(&x->id, &ua->id, sizeof(ua->id));
2272 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2273 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2274 xp->mark.m = x->mark.m = mark.m;
2275 xp->mark.v = x->mark.v = mark.v;
2277 /* extract the templates and for each call km_key */
2278 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2279 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2280 memcpy(&x->id, &t->id, sizeof(x->id));
2281 x->props.mode = t->mode;
2282 x->props.reqid = t->reqid;
2283 x->props.family = ut->family;
2284 t->aalgos = ua->aalgos;
2285 t->ealgos = ua->ealgos;
2286 t->calgos = ua->calgos;
2287 err = km_query(x, t, xp);
2302 #ifdef CONFIG_XFRM_MIGRATE
2303 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2304 struct xfrm_kmaddress *k,
2305 struct nlattr **attrs, int *num)
2307 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2308 struct xfrm_user_migrate *um;
2312 struct xfrm_user_kmaddress *uk;
2314 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2315 memcpy(&k->local, &uk->local, sizeof(k->local));
2316 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2317 k->family = uk->family;
2318 k->reserved = uk->reserved;
2322 num_migrate = nla_len(rt) / sizeof(*um);
2324 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2327 for (i = 0; i < num_migrate; i++, um++, ma++) {
2328 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2329 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2330 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2331 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2333 ma->proto = um->proto;
2334 ma->mode = um->mode;
2335 ma->reqid = um->reqid;
2337 ma->old_family = um->old_family;
2338 ma->new_family = um->new_family;
2345 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2346 struct nlattr **attrs)
2348 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2349 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2350 struct xfrm_kmaddress km, *kmp;
2354 struct net *net = sock_net(skb->sk);
2355 struct xfrm_encap_tmpl *encap = NULL;
2357 if (attrs[XFRMA_MIGRATE] == NULL)
2360 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2362 err = copy_from_user_policy_type(&type, attrs);
2366 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2373 if (attrs[XFRMA_ENCAP]) {
2374 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2375 sizeof(*encap), GFP_KERNEL);
2380 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2387 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2388 struct nlattr **attrs)
2390 return -ENOPROTOOPT;
2394 #ifdef CONFIG_XFRM_MIGRATE
2395 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2397 struct xfrm_user_migrate um;
2399 memset(&um, 0, sizeof(um));
2400 um.proto = m->proto;
2402 um.reqid = m->reqid;
2403 um.old_family = m->old_family;
2404 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2405 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2406 um.new_family = m->new_family;
2407 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2408 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2410 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2413 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2415 struct xfrm_user_kmaddress uk;
2417 memset(&uk, 0, sizeof(uk));
2418 uk.family = k->family;
2419 uk.reserved = k->reserved;
2420 memcpy(&uk.local, &k->local, sizeof(uk.local));
2421 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2423 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2426 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2429 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2430 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2431 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2432 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2433 + userpolicy_type_attrsize();
2436 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2437 int num_migrate, const struct xfrm_kmaddress *k,
2438 const struct xfrm_selector *sel,
2439 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2441 const struct xfrm_migrate *mp;
2442 struct xfrm_userpolicy_id *pol_id;
2443 struct nlmsghdr *nlh;
2446 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2450 pol_id = nlmsg_data(nlh);
2451 /* copy data from selector, dir, and type to the pol_id */
2452 memset(pol_id, 0, sizeof(*pol_id));
2453 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2457 err = copy_to_user_kmaddress(k, skb);
2462 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2466 err = copy_to_user_policy_type(type, skb);
2469 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2470 err = copy_to_user_migrate(mp, skb);
2475 nlmsg_end(skb, nlh);
2479 nlmsg_cancel(skb, nlh);
2483 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2484 const struct xfrm_migrate *m, int num_migrate,
2485 const struct xfrm_kmaddress *k,
2486 const struct xfrm_encap_tmpl *encap)
2488 struct net *net = &init_net;
2489 struct sk_buff *skb;
2492 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2498 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2501 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2504 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2505 const struct xfrm_migrate *m, int num_migrate,
2506 const struct xfrm_kmaddress *k,
2507 const struct xfrm_encap_tmpl *encap)
2509 return -ENOPROTOOPT;
2513 #define XMSGSIZE(type) sizeof(struct type)
2515 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2516 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2517 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2518 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2519 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2520 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2521 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2522 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2523 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2524 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2525 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2526 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2527 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2528 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2529 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2530 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2531 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2532 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2533 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2534 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2535 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2536 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2541 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2542 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2543 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2544 [XFRMA_LASTUSED] = { .type = NLA_U64},
2545 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2546 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2547 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2548 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2549 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2550 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2551 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2552 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2553 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2554 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2555 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2556 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2557 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2558 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2559 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2560 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2561 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2562 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2563 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2564 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2565 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2566 [XFRMA_PROTO] = { .type = NLA_U8 },
2567 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2568 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2569 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2570 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2571 [XFRMA_IF_ID] = { .type = NLA_U32 },
2574 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2575 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2576 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2579 static const struct xfrm_link {
2580 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2581 int (*start)(struct netlink_callback *);
2582 int (*dump)(struct sk_buff *, struct netlink_callback *);
2583 int (*done)(struct netlink_callback *);
2584 const struct nla_policy *nla_pol;
2586 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2587 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2588 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2589 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2590 .dump = xfrm_dump_sa,
2591 .done = xfrm_dump_sa_done },
2592 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2593 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2594 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2595 .start = xfrm_dump_policy_start,
2596 .dump = xfrm_dump_policy,
2597 .done = xfrm_dump_policy_done },
2598 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2599 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2600 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2601 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2602 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2603 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2604 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2605 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2606 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2607 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2608 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2609 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2610 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2611 .nla_pol = xfrma_spd_policy,
2612 .nla_max = XFRMA_SPD_MAX },
2613 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2616 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2617 struct netlink_ext_ack *extack)
2619 struct net *net = sock_net(skb->sk);
2620 struct nlattr *attrs[XFRMA_MAX+1];
2621 const struct xfrm_link *link;
2624 if (in_compat_syscall())
2627 type = nlh->nlmsg_type;
2628 if (type > XFRM_MSG_MAX)
2631 type -= XFRM_MSG_BASE;
2632 link = &xfrm_dispatch[type];
2634 /* All operations require privileges, even GET */
2635 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2638 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2639 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2640 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2641 if (link->dump == NULL)
2645 struct netlink_dump_control c = {
2646 .start = link->start,
2650 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2654 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2655 link->nla_max ? : XFRMA_MAX,
2656 link->nla_pol ? : xfrma_policy, extack);
2660 if (link->doit == NULL)
2663 return link->doit(skb, nlh, attrs);
2666 static void xfrm_netlink_rcv(struct sk_buff *skb)
2668 struct net *net = sock_net(skb->sk);
2670 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2671 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2672 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2675 static inline unsigned int xfrm_expire_msgsize(void)
2677 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2678 + nla_total_size(sizeof(struct xfrm_mark));
2681 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2683 struct xfrm_user_expire *ue;
2684 struct nlmsghdr *nlh;
2687 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2691 ue = nlmsg_data(nlh);
2692 copy_to_user_state(x, &ue->state);
2693 ue->hard = (c->data.hard != 0) ? 1 : 0;
2694 /* clear the padding bytes */
2695 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
2697 err = xfrm_mark_put(skb, &x->mark);
2701 err = xfrm_if_id_put(skb, x->if_id);
2705 nlmsg_end(skb, nlh);
2709 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2711 struct net *net = xs_net(x);
2712 struct sk_buff *skb;
2714 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2718 if (build_expire(skb, x, c) < 0) {
2723 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2726 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2728 struct net *net = xs_net(x);
2729 struct sk_buff *skb;
2732 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2736 err = build_aevent(skb, x, c);
2739 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2742 static int xfrm_notify_sa_flush(const struct km_event *c)
2744 struct net *net = c->net;
2745 struct xfrm_usersa_flush *p;
2746 struct nlmsghdr *nlh;
2747 struct sk_buff *skb;
2748 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2750 skb = nlmsg_new(len, GFP_ATOMIC);
2754 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2760 p = nlmsg_data(nlh);
2761 p->proto = c->data.proto;
2763 nlmsg_end(skb, nlh);
2765 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2768 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
2772 l += nla_total_size(aead_len(x->aead));
2774 l += nla_total_size(sizeof(struct xfrm_algo) +
2775 (x->aalg->alg_key_len + 7) / 8);
2776 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2779 l += nla_total_size(xfrm_alg_len(x->ealg));
2781 l += nla_total_size(sizeof(*x->calg));
2783 l += nla_total_size(sizeof(*x->encap));
2785 l += nla_total_size(sizeof(x->tfcpad));
2787 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2789 l += nla_total_size(sizeof(struct xfrm_replay_state));
2791 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2792 x->security->ctx_len);
2794 l += nla_total_size(sizeof(*x->coaddr));
2795 if (x->props.extra_flags)
2796 l += nla_total_size(sizeof(x->props.extra_flags));
2798 l += nla_total_size(sizeof(x->xso));
2799 if (x->props.smark.v | x->props.smark.m) {
2800 l += nla_total_size(sizeof(x->props.smark.v));
2801 l += nla_total_size(sizeof(x->props.smark.m));
2804 l += nla_total_size(sizeof(x->if_id));
2806 /* Must count x->lastused as it may become non-zero behind our back. */
2807 l += nla_total_size_64bit(sizeof(u64));
2812 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2814 struct net *net = xs_net(x);
2815 struct xfrm_usersa_info *p;
2816 struct xfrm_usersa_id *id;
2817 struct nlmsghdr *nlh;
2818 struct sk_buff *skb;
2819 unsigned int len = xfrm_sa_len(x);
2820 unsigned int headlen;
2823 headlen = sizeof(*p);
2824 if (c->event == XFRM_MSG_DELSA) {
2825 len += nla_total_size(headlen);
2826 headlen = sizeof(*id);
2827 len += nla_total_size(sizeof(struct xfrm_mark));
2829 len += NLMSG_ALIGN(headlen);
2831 skb = nlmsg_new(len, GFP_ATOMIC);
2835 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2840 p = nlmsg_data(nlh);
2841 if (c->event == XFRM_MSG_DELSA) {
2842 struct nlattr *attr;
2844 id = nlmsg_data(nlh);
2845 memset(id, 0, sizeof(*id));
2846 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2847 id->spi = x->id.spi;
2848 id->family = x->props.family;
2849 id->proto = x->id.proto;
2851 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2858 err = copy_to_user_state_extra(x, p, skb);
2862 nlmsg_end(skb, nlh);
2864 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2871 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2875 case XFRM_MSG_EXPIRE:
2876 return xfrm_exp_state_notify(x, c);
2877 case XFRM_MSG_NEWAE:
2878 return xfrm_aevent_state_notify(x, c);
2879 case XFRM_MSG_DELSA:
2880 case XFRM_MSG_UPDSA:
2881 case XFRM_MSG_NEWSA:
2882 return xfrm_notify_sa(x, c);
2883 case XFRM_MSG_FLUSHSA:
2884 return xfrm_notify_sa_flush(c);
2886 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2895 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2896 struct xfrm_policy *xp)
2898 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2899 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2900 + nla_total_size(sizeof(struct xfrm_mark))
2901 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2902 + userpolicy_type_attrsize();
2905 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2906 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2908 __u32 seq = xfrm_get_acqseq();
2909 struct xfrm_user_acquire *ua;
2910 struct nlmsghdr *nlh;
2913 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2917 ua = nlmsg_data(nlh);
2918 memcpy(&ua->id, &x->id, sizeof(ua->id));
2919 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2920 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2921 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2922 ua->aalgos = xt->aalgos;
2923 ua->ealgos = xt->ealgos;
2924 ua->calgos = xt->calgos;
2925 ua->seq = x->km.seq = seq;
2927 err = copy_to_user_tmpl(xp, skb);
2929 err = copy_to_user_state_sec_ctx(x, skb);
2931 err = copy_to_user_policy_type(xp->type, skb);
2933 err = xfrm_mark_put(skb, &xp->mark);
2935 err = xfrm_if_id_put(skb, xp->if_id);
2937 nlmsg_cancel(skb, nlh);
2941 nlmsg_end(skb, nlh);
2945 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2946 struct xfrm_policy *xp)
2948 struct net *net = xs_net(x);
2949 struct sk_buff *skb;
2952 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2956 err = build_acquire(skb, x, xt, xp);
2959 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2962 /* User gives us xfrm_user_policy_info followed by an array of 0
2963 * or more templates.
2965 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2966 u8 *data, int len, int *dir)
2968 struct net *net = sock_net(sk);
2969 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2970 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2971 struct xfrm_policy *xp;
2974 switch (sk->sk_family) {
2976 if (opt != IP_XFRM_POLICY) {
2981 #if IS_ENABLED(CONFIG_IPV6)
2983 if (opt != IPV6_XFRM_POLICY) {
2996 if (len < sizeof(*p) ||
2997 verify_newpolicy_info(p))
3000 nr = ((len - sizeof(*p)) / sizeof(*ut));
3001 if (validate_tmpl(nr, ut, p->sel.family))
3004 if (p->dir > XFRM_POLICY_OUT)
3007 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3013 copy_from_user_policy(xp, p);
3014 xp->type = XFRM_POLICY_TYPE_MAIN;
3015 copy_templates(xp, ut, nr);
3022 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3024 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3025 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3026 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3027 + nla_total_size(sizeof(struct xfrm_mark))
3028 + userpolicy_type_attrsize();
3031 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3032 int dir, const struct km_event *c)
3034 struct xfrm_user_polexpire *upe;
3035 int hard = c->data.hard;
3036 struct nlmsghdr *nlh;
3039 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3043 upe = nlmsg_data(nlh);
3044 copy_to_user_policy(xp, &upe->pol, dir);
3045 err = copy_to_user_tmpl(xp, skb);
3047 err = copy_to_user_sec_ctx(xp, skb);
3049 err = copy_to_user_policy_type(xp->type, skb);
3051 err = xfrm_mark_put(skb, &xp->mark);
3053 err = xfrm_if_id_put(skb, xp->if_id);
3055 nlmsg_cancel(skb, nlh);
3060 nlmsg_end(skb, nlh);
3064 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3066 struct net *net = xp_net(xp);
3067 struct sk_buff *skb;
3070 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3074 err = build_polexpire(skb, xp, dir, c);
3077 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3080 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3082 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3083 struct net *net = xp_net(xp);
3084 struct xfrm_userpolicy_info *p;
3085 struct xfrm_userpolicy_id *id;
3086 struct nlmsghdr *nlh;
3087 struct sk_buff *skb;
3088 unsigned int headlen;
3091 headlen = sizeof(*p);
3092 if (c->event == XFRM_MSG_DELPOLICY) {
3093 len += nla_total_size(headlen);
3094 headlen = sizeof(*id);
3096 len += userpolicy_type_attrsize();
3097 len += nla_total_size(sizeof(struct xfrm_mark));
3098 len += NLMSG_ALIGN(headlen);
3100 skb = nlmsg_new(len, GFP_ATOMIC);
3104 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3109 p = nlmsg_data(nlh);
3110 if (c->event == XFRM_MSG_DELPOLICY) {
3111 struct nlattr *attr;
3113 id = nlmsg_data(nlh);
3114 memset(id, 0, sizeof(*id));
3117 id->index = xp->index;
3119 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3121 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3129 copy_to_user_policy(xp, p, dir);
3130 err = copy_to_user_tmpl(xp, skb);
3132 err = copy_to_user_policy_type(xp->type, skb);
3134 err = xfrm_mark_put(skb, &xp->mark);
3136 err = xfrm_if_id_put(skb, xp->if_id);
3140 nlmsg_end(skb, nlh);
3142 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3149 static int xfrm_notify_policy_flush(const struct km_event *c)
3151 struct net *net = c->net;
3152 struct nlmsghdr *nlh;
3153 struct sk_buff *skb;
3156 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3160 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3164 err = copy_to_user_policy_type(c->data.type, skb);
3168 nlmsg_end(skb, nlh);
3170 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3177 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3181 case XFRM_MSG_NEWPOLICY:
3182 case XFRM_MSG_UPDPOLICY:
3183 case XFRM_MSG_DELPOLICY:
3184 return xfrm_notify_policy(xp, dir, c);
3185 case XFRM_MSG_FLUSHPOLICY:
3186 return xfrm_notify_policy_flush(c);
3187 case XFRM_MSG_POLEXPIRE:
3188 return xfrm_exp_policy_notify(xp, dir, c);
3190 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3198 static inline unsigned int xfrm_report_msgsize(void)
3200 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3203 static int build_report(struct sk_buff *skb, u8 proto,
3204 struct xfrm_selector *sel, xfrm_address_t *addr)
3206 struct xfrm_user_report *ur;
3207 struct nlmsghdr *nlh;
3209 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3213 ur = nlmsg_data(nlh);
3215 memcpy(&ur->sel, sel, sizeof(ur->sel));
3218 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3220 nlmsg_cancel(skb, nlh);
3224 nlmsg_end(skb, nlh);
3228 static int xfrm_send_report(struct net *net, u8 proto,
3229 struct xfrm_selector *sel, xfrm_address_t *addr)
3231 struct sk_buff *skb;
3234 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3238 err = build_report(skb, proto, sel, addr);
3241 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3244 static inline unsigned int xfrm_mapping_msgsize(void)
3246 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3249 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3250 xfrm_address_t *new_saddr, __be16 new_sport)
3252 struct xfrm_user_mapping *um;
3253 struct nlmsghdr *nlh;
3255 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3259 um = nlmsg_data(nlh);
3261 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3262 um->id.spi = x->id.spi;
3263 um->id.family = x->props.family;
3264 um->id.proto = x->id.proto;
3265 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3266 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3267 um->new_sport = new_sport;
3268 um->old_sport = x->encap->encap_sport;
3269 um->reqid = x->props.reqid;
3271 nlmsg_end(skb, nlh);
3275 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3278 struct net *net = xs_net(x);
3279 struct sk_buff *skb;
3282 if (x->id.proto != IPPROTO_ESP)
3288 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3292 err = build_mapping(skb, x, ipaddr, sport);
3295 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3298 static bool xfrm_is_alive(const struct km_event *c)
3300 return (bool)xfrm_acquire_is_on(c->net);
3303 static struct xfrm_mgr netlink_mgr = {
3304 .notify = xfrm_send_state_notify,
3305 .acquire = xfrm_send_acquire,
3306 .compile_policy = xfrm_compile_policy,
3307 .notify_policy = xfrm_send_policy_notify,
3308 .report = xfrm_send_report,
3309 .migrate = xfrm_send_migrate,
3310 .new_mapping = xfrm_send_mapping,
3311 .is_alive = xfrm_is_alive,
3314 static int __net_init xfrm_user_net_init(struct net *net)
3317 struct netlink_kernel_cfg cfg = {
3318 .groups = XFRMNLGRP_MAX,
3319 .input = xfrm_netlink_rcv,
3322 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3325 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3326 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3330 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3333 list_for_each_entry(net, net_exit_list, exit_list)
3334 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3336 list_for_each_entry(net, net_exit_list, exit_list)
3337 netlink_kernel_release(net->xfrm.nlsk_stash);
3340 static struct pernet_operations xfrm_user_net_ops = {
3341 .init = xfrm_user_net_init,
3342 .exit_batch = xfrm_user_net_exit,
3345 static int __init xfrm_user_init(void)
3349 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3351 rv = register_pernet_subsys(&xfrm_user_net_ops);
3354 rv = xfrm_register_km(&netlink_mgr);
3356 unregister_pernet_subsys(&xfrm_user_net_ops);
3360 static void __exit xfrm_user_exit(void)
3362 xfrm_unregister_km(&netlink_mgr);
3363 unregister_pernet_subsys(&xfrm_user_net_ops);
3366 module_init(xfrm_user_init);
3367 module_exit(xfrm_user_exit);
3368 MODULE_LICENSE("GPL");
3369 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);