1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
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 switch (ut[i].mode) {
1492 case XFRM_MODE_TUNNEL:
1493 case XFRM_MODE_BEET:
1496 if (ut[i].family != prev_family)
1500 if (ut[i].mode >= XFRM_MODE_MAX)
1503 prev_family = ut[i].family;
1505 switch (ut[i].family) {
1508 #if IS_ENABLED(CONFIG_IPV6)
1516 switch (ut[i].id.proto) {
1520 #if IS_ENABLED(CONFIG_IPV6)
1521 case IPPROTO_ROUTING:
1522 case IPPROTO_DSTOPTS:
1524 case IPSEC_PROTO_ANY:
1535 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1537 struct nlattr *rt = attrs[XFRMA_TMPL];
1542 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1543 int nr = nla_len(rt) / sizeof(*utmpl);
1546 err = validate_tmpl(nr, utmpl, pol->family);
1550 copy_templates(pol, utmpl, nr);
1555 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1557 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1558 struct xfrm_userpolicy_type *upt;
1559 u8 type = XFRM_POLICY_TYPE_MAIN;
1567 err = verify_policy_type(type);
1575 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1577 xp->priority = p->priority;
1578 xp->index = p->index;
1579 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1580 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1581 xp->action = p->action;
1582 xp->flags = p->flags;
1583 xp->family = p->sel.family;
1584 /* XXX xp->share = p->share; */
1587 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1589 memset(p, 0, sizeof(*p));
1590 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1591 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1592 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1593 p->priority = xp->priority;
1594 p->index = xp->index;
1595 p->sel.family = xp->family;
1597 p->action = xp->action;
1598 p->flags = xp->flags;
1599 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1602 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1604 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1612 copy_from_user_policy(xp, p);
1614 err = copy_from_user_policy_type(&xp->type, attrs);
1618 if (!(err = copy_from_user_tmpl(xp, attrs)))
1619 err = copy_from_user_sec_ctx(xp, attrs);
1623 xfrm_mark_get(attrs, &xp->mark);
1625 if (attrs[XFRMA_IF_ID])
1626 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1632 xfrm_policy_destroy(xp);
1636 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1637 struct nlattr **attrs)
1639 struct net *net = sock_net(skb->sk);
1640 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1641 struct xfrm_policy *xp;
1646 err = verify_newpolicy_info(p);
1649 err = verify_sec_ctx_len(attrs);
1653 xp = xfrm_policy_construct(net, p, attrs, &err);
1657 /* shouldn't excl be based on nlh flags??
1658 * Aha! this is anti-netlink really i.e more pfkey derived
1659 * in netlink excl is a flag and you wouldnt need
1660 * a type XFRM_MSG_UPDPOLICY - JHS */
1661 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1662 err = xfrm_policy_insert(p->dir, xp, excl);
1663 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1666 security_xfrm_policy_free(xp->security);
1671 c.event = nlh->nlmsg_type;
1672 c.seq = nlh->nlmsg_seq;
1673 c.portid = nlh->nlmsg_pid;
1674 km_policy_notify(xp, p->dir, &c);
1681 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1683 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1686 if (xp->xfrm_nr == 0)
1689 for (i = 0; i < xp->xfrm_nr; i++) {
1690 struct xfrm_user_tmpl *up = &vec[i];
1691 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1693 memset(up, 0, sizeof(*up));
1694 memcpy(&up->id, &kp->id, sizeof(up->id));
1695 up->family = kp->encap_family;
1696 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1697 up->reqid = kp->reqid;
1698 up->mode = kp->mode;
1699 up->share = kp->share;
1700 up->optional = kp->optional;
1701 up->aalgos = kp->aalgos;
1702 up->ealgos = kp->ealgos;
1703 up->calgos = kp->calgos;
1706 return nla_put(skb, XFRMA_TMPL,
1707 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1710 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1713 return copy_sec_ctx(x->security, skb);
1718 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1721 return copy_sec_ctx(xp->security, skb);
1724 static inline unsigned int userpolicy_type_attrsize(void)
1726 #ifdef CONFIG_XFRM_SUB_POLICY
1727 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1733 #ifdef CONFIG_XFRM_SUB_POLICY
1734 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1736 struct xfrm_userpolicy_type upt;
1738 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1739 memset(&upt, 0, sizeof(upt));
1742 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1746 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1752 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1754 struct xfrm_dump_info *sp = ptr;
1755 struct xfrm_userpolicy_info *p;
1756 struct sk_buff *in_skb = sp->in_skb;
1757 struct sk_buff *skb = sp->out_skb;
1758 struct nlmsghdr *nlh;
1761 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1762 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1766 p = nlmsg_data(nlh);
1767 copy_to_user_policy(xp, p, dir);
1768 err = copy_to_user_tmpl(xp, skb);
1770 err = copy_to_user_sec_ctx(xp, skb);
1772 err = copy_to_user_policy_type(xp->type, skb);
1774 err = xfrm_mark_put(skb, &xp->mark);
1776 err = xfrm_if_id_put(skb, xp->if_id);
1778 nlmsg_cancel(skb, nlh);
1781 nlmsg_end(skb, nlh);
1785 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1787 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1788 struct net *net = sock_net(cb->skb->sk);
1790 xfrm_policy_walk_done(walk, net);
1794 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1796 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1798 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1800 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1804 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1806 struct net *net = sock_net(skb->sk);
1807 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1808 struct xfrm_dump_info info;
1810 info.in_skb = cb->skb;
1812 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1813 info.nlmsg_flags = NLM_F_MULTI;
1815 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1820 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1821 struct xfrm_policy *xp,
1824 struct xfrm_dump_info info;
1825 struct sk_buff *skb;
1828 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1830 return ERR_PTR(-ENOMEM);
1832 info.in_skb = in_skb;
1834 info.nlmsg_seq = seq;
1835 info.nlmsg_flags = 0;
1837 err = dump_one_policy(xp, dir, 0, &info);
1840 return ERR_PTR(err);
1846 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1847 struct nlattr **attrs)
1849 struct net *net = sock_net(skb->sk);
1850 struct xfrm_policy *xp;
1851 struct xfrm_userpolicy_id *p;
1852 u8 type = XFRM_POLICY_TYPE_MAIN;
1857 u32 mark = xfrm_mark_get(attrs, &m);
1860 p = nlmsg_data(nlh);
1861 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1863 err = copy_from_user_policy_type(&type, attrs);
1867 err = verify_policy_dir(p->dir);
1871 if (attrs[XFRMA_IF_ID])
1872 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1875 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1877 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1878 struct xfrm_sec_ctx *ctx;
1880 err = verify_sec_ctx_len(attrs);
1886 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1888 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1892 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1894 security_xfrm_policy_free(ctx);
1900 struct sk_buff *resp_skb;
1902 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1903 if (IS_ERR(resp_skb)) {
1904 err = PTR_ERR(resp_skb);
1906 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1907 NETLINK_CB(skb).portid);
1910 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1915 c.data.byid = p->index;
1916 c.event = nlh->nlmsg_type;
1917 c.seq = nlh->nlmsg_seq;
1918 c.portid = nlh->nlmsg_pid;
1919 km_policy_notify(xp, p->dir, &c);
1927 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1928 struct nlattr **attrs)
1930 struct net *net = sock_net(skb->sk);
1932 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1935 err = xfrm_state_flush(net, p->proto, true, false);
1937 if (err == -ESRCH) /* empty table */
1941 c.data.proto = p->proto;
1942 c.event = nlh->nlmsg_type;
1943 c.seq = nlh->nlmsg_seq;
1944 c.portid = nlh->nlmsg_pid;
1946 km_state_notify(NULL, &c);
1951 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
1953 unsigned int replay_size = x->replay_esn ?
1954 xfrm_replay_state_esn_len(x->replay_esn) :
1955 sizeof(struct xfrm_replay_state);
1957 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1958 + nla_total_size(replay_size)
1959 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1960 + nla_total_size(sizeof(struct xfrm_mark))
1961 + nla_total_size(4) /* XFRM_AE_RTHR */
1962 + nla_total_size(4); /* XFRM_AE_ETHR */
1965 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1967 struct xfrm_aevent_id *id;
1968 struct nlmsghdr *nlh;
1971 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1975 id = nlmsg_data(nlh);
1976 memset(&id->sa_id, 0, sizeof(id->sa_id));
1977 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1978 id->sa_id.spi = x->id.spi;
1979 id->sa_id.family = x->props.family;
1980 id->sa_id.proto = x->id.proto;
1981 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1982 id->reqid = x->props.reqid;
1983 id->flags = c->data.aevent;
1985 if (x->replay_esn) {
1986 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1987 xfrm_replay_state_esn_len(x->replay_esn),
1990 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1995 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2000 if (id->flags & XFRM_AE_RTHR) {
2001 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2005 if (id->flags & XFRM_AE_ETHR) {
2006 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2007 x->replay_maxage * 10 / HZ);
2011 err = xfrm_mark_put(skb, &x->mark);
2015 err = xfrm_if_id_put(skb, x->if_id);
2019 nlmsg_end(skb, nlh);
2023 nlmsg_cancel(skb, nlh);
2027 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2028 struct nlattr **attrs)
2030 struct net *net = sock_net(skb->sk);
2031 struct xfrm_state *x;
2032 struct sk_buff *r_skb;
2037 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2038 struct xfrm_usersa_id *id = &p->sa_id;
2040 mark = xfrm_mark_get(attrs, &m);
2042 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2046 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2047 if (r_skb == NULL) {
2053 * XXX: is this lock really needed - none of the other
2054 * gets lock (the concern is things getting updated
2055 * while we are still reading) - jhs
2057 spin_lock_bh(&x->lock);
2058 c.data.aevent = p->flags;
2059 c.seq = nlh->nlmsg_seq;
2060 c.portid = nlh->nlmsg_pid;
2062 err = build_aevent(r_skb, x, &c);
2065 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2066 spin_unlock_bh(&x->lock);
2071 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2072 struct nlattr **attrs)
2074 struct net *net = sock_net(skb->sk);
2075 struct xfrm_state *x;
2080 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2081 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2082 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2083 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2084 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2085 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2087 if (!lt && !rp && !re && !et && !rt)
2090 /* pedantic mode - thou shalt sayeth replaceth */
2091 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2094 mark = xfrm_mark_get(attrs, &m);
2096 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2100 if (x->km.state != XFRM_STATE_VALID)
2103 err = xfrm_replay_verify_len(x->replay_esn, re);
2107 spin_lock_bh(&x->lock);
2108 xfrm_update_ae_params(x, attrs, 1);
2109 spin_unlock_bh(&x->lock);
2111 c.event = nlh->nlmsg_type;
2112 c.seq = nlh->nlmsg_seq;
2113 c.portid = nlh->nlmsg_pid;
2114 c.data.aevent = XFRM_AE_CU;
2115 km_state_notify(x, &c);
2122 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2123 struct nlattr **attrs)
2125 struct net *net = sock_net(skb->sk);
2127 u8 type = XFRM_POLICY_TYPE_MAIN;
2130 err = copy_from_user_policy_type(&type, attrs);
2134 err = xfrm_policy_flush(net, type, true);
2136 if (err == -ESRCH) /* empty table */
2142 c.event = nlh->nlmsg_type;
2143 c.seq = nlh->nlmsg_seq;
2144 c.portid = nlh->nlmsg_pid;
2146 km_policy_notify(NULL, 0, &c);
2150 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2151 struct nlattr **attrs)
2153 struct net *net = sock_net(skb->sk);
2154 struct xfrm_policy *xp;
2155 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2156 struct xfrm_userpolicy_info *p = &up->pol;
2157 u8 type = XFRM_POLICY_TYPE_MAIN;
2160 u32 mark = xfrm_mark_get(attrs, &m);
2163 err = copy_from_user_policy_type(&type, attrs);
2167 err = verify_policy_dir(p->dir);
2171 if (attrs[XFRMA_IF_ID])
2172 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2175 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2177 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2178 struct xfrm_sec_ctx *ctx;
2180 err = verify_sec_ctx_len(attrs);
2186 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2188 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2192 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2193 &p->sel, ctx, 0, &err);
2194 security_xfrm_policy_free(ctx);
2199 if (unlikely(xp->walk.dead))
2204 xfrm_policy_delete(xp, p->dir);
2205 xfrm_audit_policy_delete(xp, 1, true);
2207 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2214 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2215 struct nlattr **attrs)
2217 struct net *net = sock_net(skb->sk);
2218 struct xfrm_state *x;
2220 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2221 struct xfrm_usersa_info *p = &ue->state;
2223 u32 mark = xfrm_mark_get(attrs, &m);
2225 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2231 spin_lock_bh(&x->lock);
2233 if (x->km.state != XFRM_STATE_VALID)
2235 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2238 __xfrm_state_delete(x);
2239 xfrm_audit_state_delete(x, 1, true);
2243 spin_unlock_bh(&x->lock);
2248 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2249 struct nlattr **attrs)
2251 struct net *net = sock_net(skb->sk);
2252 struct xfrm_policy *xp;
2253 struct xfrm_user_tmpl *ut;
2255 struct nlattr *rt = attrs[XFRMA_TMPL];
2256 struct xfrm_mark mark;
2258 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2259 struct xfrm_state *x = xfrm_state_alloc(net);
2265 xfrm_mark_get(attrs, &mark);
2267 err = verify_newpolicy_info(&ua->policy);
2272 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2276 memcpy(&x->id, &ua->id, sizeof(ua->id));
2277 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2278 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2279 xp->mark.m = x->mark.m = mark.m;
2280 xp->mark.v = x->mark.v = mark.v;
2282 /* extract the templates and for each call km_key */
2283 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2284 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2285 memcpy(&x->id, &t->id, sizeof(x->id));
2286 x->props.mode = t->mode;
2287 x->props.reqid = t->reqid;
2288 x->props.family = ut->family;
2289 t->aalgos = ua->aalgos;
2290 t->ealgos = ua->ealgos;
2291 t->calgos = ua->calgos;
2292 err = km_query(x, t, xp);
2307 #ifdef CONFIG_XFRM_MIGRATE
2308 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2309 struct xfrm_kmaddress *k,
2310 struct nlattr **attrs, int *num)
2312 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2313 struct xfrm_user_migrate *um;
2317 struct xfrm_user_kmaddress *uk;
2319 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2320 memcpy(&k->local, &uk->local, sizeof(k->local));
2321 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2322 k->family = uk->family;
2323 k->reserved = uk->reserved;
2327 num_migrate = nla_len(rt) / sizeof(*um);
2329 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2332 for (i = 0; i < num_migrate; i++, um++, ma++) {
2333 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2334 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2335 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2336 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2338 ma->proto = um->proto;
2339 ma->mode = um->mode;
2340 ma->reqid = um->reqid;
2342 ma->old_family = um->old_family;
2343 ma->new_family = um->new_family;
2350 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2351 struct nlattr **attrs)
2353 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2354 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2355 struct xfrm_kmaddress km, *kmp;
2359 struct net *net = sock_net(skb->sk);
2360 struct xfrm_encap_tmpl *encap = NULL;
2362 if (attrs[XFRMA_MIGRATE] == NULL)
2365 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2367 err = copy_from_user_policy_type(&type, attrs);
2371 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2378 if (attrs[XFRMA_ENCAP]) {
2379 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2380 sizeof(*encap), GFP_KERNEL);
2385 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2392 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2393 struct nlattr **attrs)
2395 return -ENOPROTOOPT;
2399 #ifdef CONFIG_XFRM_MIGRATE
2400 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2402 struct xfrm_user_migrate um;
2404 memset(&um, 0, sizeof(um));
2405 um.proto = m->proto;
2407 um.reqid = m->reqid;
2408 um.old_family = m->old_family;
2409 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2410 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2411 um.new_family = m->new_family;
2412 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2413 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2415 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2418 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2420 struct xfrm_user_kmaddress uk;
2422 memset(&uk, 0, sizeof(uk));
2423 uk.family = k->family;
2424 uk.reserved = k->reserved;
2425 memcpy(&uk.local, &k->local, sizeof(uk.local));
2426 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2428 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2431 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2434 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2435 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2436 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2437 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2438 + userpolicy_type_attrsize();
2441 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2442 int num_migrate, const struct xfrm_kmaddress *k,
2443 const struct xfrm_selector *sel,
2444 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2446 const struct xfrm_migrate *mp;
2447 struct xfrm_userpolicy_id *pol_id;
2448 struct nlmsghdr *nlh;
2451 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2455 pol_id = nlmsg_data(nlh);
2456 /* copy data from selector, dir, and type to the pol_id */
2457 memset(pol_id, 0, sizeof(*pol_id));
2458 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2462 err = copy_to_user_kmaddress(k, skb);
2467 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2471 err = copy_to_user_policy_type(type, skb);
2474 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2475 err = copy_to_user_migrate(mp, skb);
2480 nlmsg_end(skb, nlh);
2484 nlmsg_cancel(skb, nlh);
2488 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2489 const struct xfrm_migrate *m, int num_migrate,
2490 const struct xfrm_kmaddress *k,
2491 const struct xfrm_encap_tmpl *encap)
2493 struct net *net = &init_net;
2494 struct sk_buff *skb;
2497 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2503 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2506 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2509 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2510 const struct xfrm_migrate *m, int num_migrate,
2511 const struct xfrm_kmaddress *k,
2512 const struct xfrm_encap_tmpl *encap)
2514 return -ENOPROTOOPT;
2518 #define XMSGSIZE(type) sizeof(struct type)
2520 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2521 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2522 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2523 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2524 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2525 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2526 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2527 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2528 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2529 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2530 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2531 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2532 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2533 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2534 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2535 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2536 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2537 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2538 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2539 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2540 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2541 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2546 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2547 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2548 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2549 [XFRMA_LASTUSED] = { .type = NLA_U64},
2550 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2551 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2552 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2553 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2554 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2555 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2556 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2557 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2558 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2559 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2560 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2561 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2562 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2563 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2564 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2565 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2566 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2567 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2568 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2569 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2570 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2571 [XFRMA_PROTO] = { .type = NLA_U8 },
2572 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2573 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2574 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2575 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2576 [XFRMA_IF_ID] = { .type = NLA_U32 },
2579 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2580 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2581 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2584 static const struct xfrm_link {
2585 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2586 int (*start)(struct netlink_callback *);
2587 int (*dump)(struct sk_buff *, struct netlink_callback *);
2588 int (*done)(struct netlink_callback *);
2589 const struct nla_policy *nla_pol;
2591 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2592 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2593 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2594 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2595 .dump = xfrm_dump_sa,
2596 .done = xfrm_dump_sa_done },
2597 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2598 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2599 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2600 .start = xfrm_dump_policy_start,
2601 .dump = xfrm_dump_policy,
2602 .done = xfrm_dump_policy_done },
2603 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2604 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2605 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2606 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2607 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2608 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2609 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2610 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2611 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2612 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2613 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2614 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2615 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2616 .nla_pol = xfrma_spd_policy,
2617 .nla_max = XFRMA_SPD_MAX },
2618 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2621 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2622 struct netlink_ext_ack *extack)
2624 struct net *net = sock_net(skb->sk);
2625 struct nlattr *attrs[XFRMA_MAX+1];
2626 const struct xfrm_link *link;
2629 if (in_compat_syscall())
2632 type = nlh->nlmsg_type;
2633 if (type > XFRM_MSG_MAX)
2636 type -= XFRM_MSG_BASE;
2637 link = &xfrm_dispatch[type];
2639 /* All operations require privileges, even GET */
2640 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2643 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2644 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2645 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2646 if (link->dump == NULL)
2650 struct netlink_dump_control c = {
2651 .start = link->start,
2655 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2659 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2660 link->nla_max ? : XFRMA_MAX,
2661 link->nla_pol ? : xfrma_policy, extack);
2665 if (link->doit == NULL)
2668 return link->doit(skb, nlh, attrs);
2671 static void xfrm_netlink_rcv(struct sk_buff *skb)
2673 struct net *net = sock_net(skb->sk);
2675 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2676 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2677 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2680 static inline unsigned int xfrm_expire_msgsize(void)
2682 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2683 + nla_total_size(sizeof(struct xfrm_mark));
2686 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2688 struct xfrm_user_expire *ue;
2689 struct nlmsghdr *nlh;
2692 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2696 ue = nlmsg_data(nlh);
2697 copy_to_user_state(x, &ue->state);
2698 ue->hard = (c->data.hard != 0) ? 1 : 0;
2699 /* clear the padding bytes */
2700 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
2702 err = xfrm_mark_put(skb, &x->mark);
2706 err = xfrm_if_id_put(skb, x->if_id);
2710 nlmsg_end(skb, nlh);
2714 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2716 struct net *net = xs_net(x);
2717 struct sk_buff *skb;
2719 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2723 if (build_expire(skb, x, c) < 0) {
2728 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2731 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2733 struct net *net = xs_net(x);
2734 struct sk_buff *skb;
2737 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2741 err = build_aevent(skb, x, c);
2744 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2747 static int xfrm_notify_sa_flush(const struct km_event *c)
2749 struct net *net = c->net;
2750 struct xfrm_usersa_flush *p;
2751 struct nlmsghdr *nlh;
2752 struct sk_buff *skb;
2753 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2755 skb = nlmsg_new(len, GFP_ATOMIC);
2759 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2765 p = nlmsg_data(nlh);
2766 p->proto = c->data.proto;
2768 nlmsg_end(skb, nlh);
2770 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2773 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
2777 l += nla_total_size(aead_len(x->aead));
2779 l += nla_total_size(sizeof(struct xfrm_algo) +
2780 (x->aalg->alg_key_len + 7) / 8);
2781 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2784 l += nla_total_size(xfrm_alg_len(x->ealg));
2786 l += nla_total_size(sizeof(*x->calg));
2788 l += nla_total_size(sizeof(*x->encap));
2790 l += nla_total_size(sizeof(x->tfcpad));
2792 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2794 l += nla_total_size(sizeof(struct xfrm_replay_state));
2796 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2797 x->security->ctx_len);
2799 l += nla_total_size(sizeof(*x->coaddr));
2800 if (x->props.extra_flags)
2801 l += nla_total_size(sizeof(x->props.extra_flags));
2803 l += nla_total_size(sizeof(x->xso));
2804 if (x->props.smark.v | x->props.smark.m) {
2805 l += nla_total_size(sizeof(x->props.smark.v));
2806 l += nla_total_size(sizeof(x->props.smark.m));
2809 l += nla_total_size(sizeof(x->if_id));
2811 /* Must count x->lastused as it may become non-zero behind our back. */
2812 l += nla_total_size_64bit(sizeof(u64));
2817 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2819 struct net *net = xs_net(x);
2820 struct xfrm_usersa_info *p;
2821 struct xfrm_usersa_id *id;
2822 struct nlmsghdr *nlh;
2823 struct sk_buff *skb;
2824 unsigned int len = xfrm_sa_len(x);
2825 unsigned int headlen;
2828 headlen = sizeof(*p);
2829 if (c->event == XFRM_MSG_DELSA) {
2830 len += nla_total_size(headlen);
2831 headlen = sizeof(*id);
2832 len += nla_total_size(sizeof(struct xfrm_mark));
2834 len += NLMSG_ALIGN(headlen);
2836 skb = nlmsg_new(len, GFP_ATOMIC);
2840 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2845 p = nlmsg_data(nlh);
2846 if (c->event == XFRM_MSG_DELSA) {
2847 struct nlattr *attr;
2849 id = nlmsg_data(nlh);
2850 memset(id, 0, sizeof(*id));
2851 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2852 id->spi = x->id.spi;
2853 id->family = x->props.family;
2854 id->proto = x->id.proto;
2856 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2863 err = copy_to_user_state_extra(x, p, skb);
2867 nlmsg_end(skb, nlh);
2869 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2876 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2880 case XFRM_MSG_EXPIRE:
2881 return xfrm_exp_state_notify(x, c);
2882 case XFRM_MSG_NEWAE:
2883 return xfrm_aevent_state_notify(x, c);
2884 case XFRM_MSG_DELSA:
2885 case XFRM_MSG_UPDSA:
2886 case XFRM_MSG_NEWSA:
2887 return xfrm_notify_sa(x, c);
2888 case XFRM_MSG_FLUSHSA:
2889 return xfrm_notify_sa_flush(c);
2891 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2900 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2901 struct xfrm_policy *xp)
2903 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2904 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2905 + nla_total_size(sizeof(struct xfrm_mark))
2906 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2907 + userpolicy_type_attrsize();
2910 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2911 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2913 __u32 seq = xfrm_get_acqseq();
2914 struct xfrm_user_acquire *ua;
2915 struct nlmsghdr *nlh;
2918 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2922 ua = nlmsg_data(nlh);
2923 memcpy(&ua->id, &x->id, sizeof(ua->id));
2924 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2925 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2926 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2927 ua->aalgos = xt->aalgos;
2928 ua->ealgos = xt->ealgos;
2929 ua->calgos = xt->calgos;
2930 ua->seq = x->km.seq = seq;
2932 err = copy_to_user_tmpl(xp, skb);
2934 err = copy_to_user_state_sec_ctx(x, skb);
2936 err = copy_to_user_policy_type(xp->type, skb);
2938 err = xfrm_mark_put(skb, &xp->mark);
2940 err = xfrm_if_id_put(skb, xp->if_id);
2942 nlmsg_cancel(skb, nlh);
2946 nlmsg_end(skb, nlh);
2950 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2951 struct xfrm_policy *xp)
2953 struct net *net = xs_net(x);
2954 struct sk_buff *skb;
2957 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2961 err = build_acquire(skb, x, xt, xp);
2964 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2967 /* User gives us xfrm_user_policy_info followed by an array of 0
2968 * or more templates.
2970 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2971 u8 *data, int len, int *dir)
2973 struct net *net = sock_net(sk);
2974 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2975 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2976 struct xfrm_policy *xp;
2979 switch (sk->sk_family) {
2981 if (opt != IP_XFRM_POLICY) {
2986 #if IS_ENABLED(CONFIG_IPV6)
2988 if (opt != IPV6_XFRM_POLICY) {
3001 if (len < sizeof(*p) ||
3002 verify_newpolicy_info(p))
3005 nr = ((len - sizeof(*p)) / sizeof(*ut));
3006 if (validate_tmpl(nr, ut, p->sel.family))
3009 if (p->dir > XFRM_POLICY_OUT)
3012 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3018 copy_from_user_policy(xp, p);
3019 xp->type = XFRM_POLICY_TYPE_MAIN;
3020 copy_templates(xp, ut, nr);
3027 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3029 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3030 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3031 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3032 + nla_total_size(sizeof(struct xfrm_mark))
3033 + userpolicy_type_attrsize();
3036 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3037 int dir, const struct km_event *c)
3039 struct xfrm_user_polexpire *upe;
3040 int hard = c->data.hard;
3041 struct nlmsghdr *nlh;
3044 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3048 upe = nlmsg_data(nlh);
3049 copy_to_user_policy(xp, &upe->pol, dir);
3050 err = copy_to_user_tmpl(xp, skb);
3052 err = copy_to_user_sec_ctx(xp, skb);
3054 err = copy_to_user_policy_type(xp->type, skb);
3056 err = xfrm_mark_put(skb, &xp->mark);
3058 err = xfrm_if_id_put(skb, xp->if_id);
3060 nlmsg_cancel(skb, nlh);
3065 nlmsg_end(skb, nlh);
3069 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3071 struct net *net = xp_net(xp);
3072 struct sk_buff *skb;
3075 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3079 err = build_polexpire(skb, xp, dir, c);
3082 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3085 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3087 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3088 struct net *net = xp_net(xp);
3089 struct xfrm_userpolicy_info *p;
3090 struct xfrm_userpolicy_id *id;
3091 struct nlmsghdr *nlh;
3092 struct sk_buff *skb;
3093 unsigned int headlen;
3096 headlen = sizeof(*p);
3097 if (c->event == XFRM_MSG_DELPOLICY) {
3098 len += nla_total_size(headlen);
3099 headlen = sizeof(*id);
3101 len += userpolicy_type_attrsize();
3102 len += nla_total_size(sizeof(struct xfrm_mark));
3103 len += NLMSG_ALIGN(headlen);
3105 skb = nlmsg_new(len, GFP_ATOMIC);
3109 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3114 p = nlmsg_data(nlh);
3115 if (c->event == XFRM_MSG_DELPOLICY) {
3116 struct nlattr *attr;
3118 id = nlmsg_data(nlh);
3119 memset(id, 0, sizeof(*id));
3122 id->index = xp->index;
3124 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3126 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3134 copy_to_user_policy(xp, p, dir);
3135 err = copy_to_user_tmpl(xp, skb);
3137 err = copy_to_user_policy_type(xp->type, skb);
3139 err = xfrm_mark_put(skb, &xp->mark);
3141 err = xfrm_if_id_put(skb, xp->if_id);
3145 nlmsg_end(skb, nlh);
3147 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3154 static int xfrm_notify_policy_flush(const struct km_event *c)
3156 struct net *net = c->net;
3157 struct nlmsghdr *nlh;
3158 struct sk_buff *skb;
3161 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3165 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3169 err = copy_to_user_policy_type(c->data.type, skb);
3173 nlmsg_end(skb, nlh);
3175 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3182 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3186 case XFRM_MSG_NEWPOLICY:
3187 case XFRM_MSG_UPDPOLICY:
3188 case XFRM_MSG_DELPOLICY:
3189 return xfrm_notify_policy(xp, dir, c);
3190 case XFRM_MSG_FLUSHPOLICY:
3191 return xfrm_notify_policy_flush(c);
3192 case XFRM_MSG_POLEXPIRE:
3193 return xfrm_exp_policy_notify(xp, dir, c);
3195 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3203 static inline unsigned int xfrm_report_msgsize(void)
3205 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3208 static int build_report(struct sk_buff *skb, u8 proto,
3209 struct xfrm_selector *sel, xfrm_address_t *addr)
3211 struct xfrm_user_report *ur;
3212 struct nlmsghdr *nlh;
3214 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3218 ur = nlmsg_data(nlh);
3220 memcpy(&ur->sel, sel, sizeof(ur->sel));
3223 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3225 nlmsg_cancel(skb, nlh);
3229 nlmsg_end(skb, nlh);
3233 static int xfrm_send_report(struct net *net, u8 proto,
3234 struct xfrm_selector *sel, xfrm_address_t *addr)
3236 struct sk_buff *skb;
3239 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3243 err = build_report(skb, proto, sel, addr);
3246 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3249 static inline unsigned int xfrm_mapping_msgsize(void)
3251 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3254 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3255 xfrm_address_t *new_saddr, __be16 new_sport)
3257 struct xfrm_user_mapping *um;
3258 struct nlmsghdr *nlh;
3260 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3264 um = nlmsg_data(nlh);
3266 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3267 um->id.spi = x->id.spi;
3268 um->id.family = x->props.family;
3269 um->id.proto = x->id.proto;
3270 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3271 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3272 um->new_sport = new_sport;
3273 um->old_sport = x->encap->encap_sport;
3274 um->reqid = x->props.reqid;
3276 nlmsg_end(skb, nlh);
3280 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3283 struct net *net = xs_net(x);
3284 struct sk_buff *skb;
3287 if (x->id.proto != IPPROTO_ESP)
3293 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3297 err = build_mapping(skb, x, ipaddr, sport);
3300 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3303 static bool xfrm_is_alive(const struct km_event *c)
3305 return (bool)xfrm_acquire_is_on(c->net);
3308 static struct xfrm_mgr netlink_mgr = {
3309 .notify = xfrm_send_state_notify,
3310 .acquire = xfrm_send_acquire,
3311 .compile_policy = xfrm_compile_policy,
3312 .notify_policy = xfrm_send_policy_notify,
3313 .report = xfrm_send_report,
3314 .migrate = xfrm_send_migrate,
3315 .new_mapping = xfrm_send_mapping,
3316 .is_alive = xfrm_is_alive,
3319 static int __net_init xfrm_user_net_init(struct net *net)
3322 struct netlink_kernel_cfg cfg = {
3323 .groups = XFRMNLGRP_MAX,
3324 .input = xfrm_netlink_rcv,
3327 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3330 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3331 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3335 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3338 list_for_each_entry(net, net_exit_list, exit_list)
3339 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3341 list_for_each_entry(net, net_exit_list, exit_list)
3342 netlink_kernel_release(net->xfrm.nlsk_stash);
3345 static struct pernet_operations xfrm_user_net_ops = {
3346 .init = xfrm_user_net_init,
3347 .exit_batch = xfrm_user_net_exit,
3350 static int __init xfrm_user_init(void)
3354 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3356 rv = register_pernet_subsys(&xfrm_user_net_ops);
3359 rv = xfrm_register_km(&netlink_mgr);
3361 unregister_pernet_subsys(&xfrm_user_net_ops);
3365 static void __exit xfrm_user_exit(void)
3367 xfrm_unregister_km(&netlink_mgr);
3368 unregister_pernet_subsys(&xfrm_user_net_ops);
3371 module_init(xfrm_user_init);
3372 module_exit(xfrm_user_exit);
3373 MODULE_LICENSE("GPL");
3374 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);