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_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1010 xfrma_policy, cb->extack);
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 && (xfrm_policy_id2dir(p->index) != 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 if (!xfrm_id_proto_valid(ut[i].id.proto))
1523 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1525 struct nlattr *rt = attrs[XFRMA_TMPL];
1530 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1531 int nr = nla_len(rt) / sizeof(*utmpl);
1534 err = validate_tmpl(nr, utmpl, pol->family);
1538 copy_templates(pol, utmpl, nr);
1543 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1545 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1546 struct xfrm_userpolicy_type *upt;
1547 u8 type = XFRM_POLICY_TYPE_MAIN;
1555 err = verify_policy_type(type);
1563 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1565 xp->priority = p->priority;
1566 xp->index = p->index;
1567 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1568 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1569 xp->action = p->action;
1570 xp->flags = p->flags;
1571 xp->family = p->sel.family;
1572 /* XXX xp->share = p->share; */
1575 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1577 memset(p, 0, sizeof(*p));
1578 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1579 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1580 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1581 p->priority = xp->priority;
1582 p->index = xp->index;
1583 p->sel.family = xp->family;
1585 p->action = xp->action;
1586 p->flags = xp->flags;
1587 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1590 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1592 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1600 copy_from_user_policy(xp, p);
1602 err = copy_from_user_policy_type(&xp->type, attrs);
1606 if (!(err = copy_from_user_tmpl(xp, attrs)))
1607 err = copy_from_user_sec_ctx(xp, attrs);
1611 xfrm_mark_get(attrs, &xp->mark);
1613 if (attrs[XFRMA_IF_ID])
1614 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1620 xfrm_policy_destroy(xp);
1624 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1625 struct nlattr **attrs)
1627 struct net *net = sock_net(skb->sk);
1628 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1629 struct xfrm_policy *xp;
1634 err = verify_newpolicy_info(p);
1637 err = verify_sec_ctx_len(attrs);
1641 xp = xfrm_policy_construct(net, p, attrs, &err);
1645 /* shouldn't excl be based on nlh flags??
1646 * Aha! this is anti-netlink really i.e more pfkey derived
1647 * in netlink excl is a flag and you wouldnt need
1648 * a type XFRM_MSG_UPDPOLICY - JHS */
1649 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1650 err = xfrm_policy_insert(p->dir, xp, excl);
1651 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1654 security_xfrm_policy_free(xp->security);
1659 c.event = nlh->nlmsg_type;
1660 c.seq = nlh->nlmsg_seq;
1661 c.portid = nlh->nlmsg_pid;
1662 km_policy_notify(xp, p->dir, &c);
1669 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1671 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1674 if (xp->xfrm_nr == 0)
1677 for (i = 0; i < xp->xfrm_nr; i++) {
1678 struct xfrm_user_tmpl *up = &vec[i];
1679 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1681 memset(up, 0, sizeof(*up));
1682 memcpy(&up->id, &kp->id, sizeof(up->id));
1683 up->family = kp->encap_family;
1684 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1685 up->reqid = kp->reqid;
1686 up->mode = kp->mode;
1687 up->share = kp->share;
1688 up->optional = kp->optional;
1689 up->aalgos = kp->aalgos;
1690 up->ealgos = kp->ealgos;
1691 up->calgos = kp->calgos;
1694 return nla_put(skb, XFRMA_TMPL,
1695 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1698 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1701 return copy_sec_ctx(x->security, skb);
1706 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1709 return copy_sec_ctx(xp->security, skb);
1712 static inline unsigned int userpolicy_type_attrsize(void)
1714 #ifdef CONFIG_XFRM_SUB_POLICY
1715 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1721 #ifdef CONFIG_XFRM_SUB_POLICY
1722 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1724 struct xfrm_userpolicy_type upt;
1726 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1727 memset(&upt, 0, sizeof(upt));
1730 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1734 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1740 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1742 struct xfrm_dump_info *sp = ptr;
1743 struct xfrm_userpolicy_info *p;
1744 struct sk_buff *in_skb = sp->in_skb;
1745 struct sk_buff *skb = sp->out_skb;
1746 struct nlmsghdr *nlh;
1749 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1750 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1754 p = nlmsg_data(nlh);
1755 copy_to_user_policy(xp, p, dir);
1756 err = copy_to_user_tmpl(xp, skb);
1758 err = copy_to_user_sec_ctx(xp, skb);
1760 err = copy_to_user_policy_type(xp->type, skb);
1762 err = xfrm_mark_put(skb, &xp->mark);
1764 err = xfrm_if_id_put(skb, xp->if_id);
1766 nlmsg_cancel(skb, nlh);
1769 nlmsg_end(skb, nlh);
1773 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1775 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1776 struct net *net = sock_net(cb->skb->sk);
1778 xfrm_policy_walk_done(walk, net);
1782 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1784 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1786 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1788 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1792 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1794 struct net *net = sock_net(skb->sk);
1795 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1796 struct xfrm_dump_info info;
1798 info.in_skb = cb->skb;
1800 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1801 info.nlmsg_flags = NLM_F_MULTI;
1803 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1808 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1809 struct xfrm_policy *xp,
1812 struct xfrm_dump_info info;
1813 struct sk_buff *skb;
1816 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1818 return ERR_PTR(-ENOMEM);
1820 info.in_skb = in_skb;
1822 info.nlmsg_seq = seq;
1823 info.nlmsg_flags = 0;
1825 err = dump_one_policy(xp, dir, 0, &info);
1828 return ERR_PTR(err);
1834 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1835 struct nlattr **attrs)
1837 struct net *net = sock_net(skb->sk);
1838 struct xfrm_policy *xp;
1839 struct xfrm_userpolicy_id *p;
1840 u8 type = XFRM_POLICY_TYPE_MAIN;
1845 u32 mark = xfrm_mark_get(attrs, &m);
1848 p = nlmsg_data(nlh);
1849 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1851 err = copy_from_user_policy_type(&type, attrs);
1855 err = verify_policy_dir(p->dir);
1859 if (attrs[XFRMA_IF_ID])
1860 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1863 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1865 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1866 struct xfrm_sec_ctx *ctx;
1868 err = verify_sec_ctx_len(attrs);
1874 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1876 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1880 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1882 security_xfrm_policy_free(ctx);
1888 struct sk_buff *resp_skb;
1890 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1891 if (IS_ERR(resp_skb)) {
1892 err = PTR_ERR(resp_skb);
1894 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1895 NETLINK_CB(skb).portid);
1898 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1903 c.data.byid = p->index;
1904 c.event = nlh->nlmsg_type;
1905 c.seq = nlh->nlmsg_seq;
1906 c.portid = nlh->nlmsg_pid;
1907 km_policy_notify(xp, p->dir, &c);
1915 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1916 struct nlattr **attrs)
1918 struct net *net = sock_net(skb->sk);
1920 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1923 err = xfrm_state_flush(net, p->proto, true, false);
1925 if (err == -ESRCH) /* empty table */
1929 c.data.proto = p->proto;
1930 c.event = nlh->nlmsg_type;
1931 c.seq = nlh->nlmsg_seq;
1932 c.portid = nlh->nlmsg_pid;
1934 km_state_notify(NULL, &c);
1939 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
1941 unsigned int replay_size = x->replay_esn ?
1942 xfrm_replay_state_esn_len(x->replay_esn) :
1943 sizeof(struct xfrm_replay_state);
1945 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1946 + nla_total_size(replay_size)
1947 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1948 + nla_total_size(sizeof(struct xfrm_mark))
1949 + nla_total_size(4) /* XFRM_AE_RTHR */
1950 + nla_total_size(4); /* XFRM_AE_ETHR */
1953 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1955 struct xfrm_aevent_id *id;
1956 struct nlmsghdr *nlh;
1959 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1963 id = nlmsg_data(nlh);
1964 memset(&id->sa_id, 0, sizeof(id->sa_id));
1965 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1966 id->sa_id.spi = x->id.spi;
1967 id->sa_id.family = x->props.family;
1968 id->sa_id.proto = x->id.proto;
1969 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1970 id->reqid = x->props.reqid;
1971 id->flags = c->data.aevent;
1973 if (x->replay_esn) {
1974 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1975 xfrm_replay_state_esn_len(x->replay_esn),
1978 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1983 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1988 if (id->flags & XFRM_AE_RTHR) {
1989 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1993 if (id->flags & XFRM_AE_ETHR) {
1994 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1995 x->replay_maxage * 10 / HZ);
1999 err = xfrm_mark_put(skb, &x->mark);
2003 err = xfrm_if_id_put(skb, x->if_id);
2007 nlmsg_end(skb, nlh);
2011 nlmsg_cancel(skb, nlh);
2015 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2016 struct nlattr **attrs)
2018 struct net *net = sock_net(skb->sk);
2019 struct xfrm_state *x;
2020 struct sk_buff *r_skb;
2025 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2026 struct xfrm_usersa_id *id = &p->sa_id;
2028 mark = xfrm_mark_get(attrs, &m);
2030 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2034 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2035 if (r_skb == NULL) {
2041 * XXX: is this lock really needed - none of the other
2042 * gets lock (the concern is things getting updated
2043 * while we are still reading) - jhs
2045 spin_lock_bh(&x->lock);
2046 c.data.aevent = p->flags;
2047 c.seq = nlh->nlmsg_seq;
2048 c.portid = nlh->nlmsg_pid;
2050 err = build_aevent(r_skb, x, &c);
2053 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2054 spin_unlock_bh(&x->lock);
2059 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2060 struct nlattr **attrs)
2062 struct net *net = sock_net(skb->sk);
2063 struct xfrm_state *x;
2068 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2069 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2070 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2071 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2072 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2073 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2075 if (!lt && !rp && !re && !et && !rt)
2078 /* pedantic mode - thou shalt sayeth replaceth */
2079 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2082 mark = xfrm_mark_get(attrs, &m);
2084 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2088 if (x->km.state != XFRM_STATE_VALID)
2091 err = xfrm_replay_verify_len(x->replay_esn, re);
2095 spin_lock_bh(&x->lock);
2096 xfrm_update_ae_params(x, attrs, 1);
2097 spin_unlock_bh(&x->lock);
2099 c.event = nlh->nlmsg_type;
2100 c.seq = nlh->nlmsg_seq;
2101 c.portid = nlh->nlmsg_pid;
2102 c.data.aevent = XFRM_AE_CU;
2103 km_state_notify(x, &c);
2110 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2111 struct nlattr **attrs)
2113 struct net *net = sock_net(skb->sk);
2115 u8 type = XFRM_POLICY_TYPE_MAIN;
2118 err = copy_from_user_policy_type(&type, attrs);
2122 err = xfrm_policy_flush(net, type, true);
2124 if (err == -ESRCH) /* empty table */
2130 c.event = nlh->nlmsg_type;
2131 c.seq = nlh->nlmsg_seq;
2132 c.portid = nlh->nlmsg_pid;
2134 km_policy_notify(NULL, 0, &c);
2138 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2139 struct nlattr **attrs)
2141 struct net *net = sock_net(skb->sk);
2142 struct xfrm_policy *xp;
2143 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2144 struct xfrm_userpolicy_info *p = &up->pol;
2145 u8 type = XFRM_POLICY_TYPE_MAIN;
2148 u32 mark = xfrm_mark_get(attrs, &m);
2151 err = copy_from_user_policy_type(&type, attrs);
2155 err = verify_policy_dir(p->dir);
2159 if (attrs[XFRMA_IF_ID])
2160 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2163 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2165 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2166 struct xfrm_sec_ctx *ctx;
2168 err = verify_sec_ctx_len(attrs);
2174 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2176 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2180 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2181 &p->sel, ctx, 0, &err);
2182 security_xfrm_policy_free(ctx);
2187 if (unlikely(xp->walk.dead))
2192 xfrm_policy_delete(xp, p->dir);
2193 xfrm_audit_policy_delete(xp, 1, true);
2195 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2202 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2203 struct nlattr **attrs)
2205 struct net *net = sock_net(skb->sk);
2206 struct xfrm_state *x;
2208 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2209 struct xfrm_usersa_info *p = &ue->state;
2211 u32 mark = xfrm_mark_get(attrs, &m);
2213 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2219 spin_lock_bh(&x->lock);
2221 if (x->km.state != XFRM_STATE_VALID)
2223 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2226 __xfrm_state_delete(x);
2227 xfrm_audit_state_delete(x, 1, true);
2231 spin_unlock_bh(&x->lock);
2236 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2237 struct nlattr **attrs)
2239 struct net *net = sock_net(skb->sk);
2240 struct xfrm_policy *xp;
2241 struct xfrm_user_tmpl *ut;
2243 struct nlattr *rt = attrs[XFRMA_TMPL];
2244 struct xfrm_mark mark;
2246 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2247 struct xfrm_state *x = xfrm_state_alloc(net);
2253 xfrm_mark_get(attrs, &mark);
2255 err = verify_newpolicy_info(&ua->policy);
2260 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2264 memcpy(&x->id, &ua->id, sizeof(ua->id));
2265 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2266 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2267 xp->mark.m = x->mark.m = mark.m;
2268 xp->mark.v = x->mark.v = mark.v;
2270 /* extract the templates and for each call km_key */
2271 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2272 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2273 memcpy(&x->id, &t->id, sizeof(x->id));
2274 x->props.mode = t->mode;
2275 x->props.reqid = t->reqid;
2276 x->props.family = ut->family;
2277 t->aalgos = ua->aalgos;
2278 t->ealgos = ua->ealgos;
2279 t->calgos = ua->calgos;
2280 err = km_query(x, t, xp);
2295 #ifdef CONFIG_XFRM_MIGRATE
2296 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2297 struct xfrm_kmaddress *k,
2298 struct nlattr **attrs, int *num)
2300 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2301 struct xfrm_user_migrate *um;
2305 struct xfrm_user_kmaddress *uk;
2307 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2308 memcpy(&k->local, &uk->local, sizeof(k->local));
2309 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2310 k->family = uk->family;
2311 k->reserved = uk->reserved;
2315 num_migrate = nla_len(rt) / sizeof(*um);
2317 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2320 for (i = 0; i < num_migrate; i++, um++, ma++) {
2321 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2322 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2323 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2324 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2326 ma->proto = um->proto;
2327 ma->mode = um->mode;
2328 ma->reqid = um->reqid;
2330 ma->old_family = um->old_family;
2331 ma->new_family = um->new_family;
2338 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2339 struct nlattr **attrs)
2341 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2342 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2343 struct xfrm_kmaddress km, *kmp;
2347 struct net *net = sock_net(skb->sk);
2348 struct xfrm_encap_tmpl *encap = NULL;
2350 if (attrs[XFRMA_MIGRATE] == NULL)
2353 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2355 err = copy_from_user_policy_type(&type, attrs);
2359 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2366 if (attrs[XFRMA_ENCAP]) {
2367 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2368 sizeof(*encap), GFP_KERNEL);
2373 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2380 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2381 struct nlattr **attrs)
2383 return -ENOPROTOOPT;
2387 #ifdef CONFIG_XFRM_MIGRATE
2388 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2390 struct xfrm_user_migrate um;
2392 memset(&um, 0, sizeof(um));
2393 um.proto = m->proto;
2395 um.reqid = m->reqid;
2396 um.old_family = m->old_family;
2397 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2398 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2399 um.new_family = m->new_family;
2400 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2401 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2403 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2406 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2408 struct xfrm_user_kmaddress uk;
2410 memset(&uk, 0, sizeof(uk));
2411 uk.family = k->family;
2412 uk.reserved = k->reserved;
2413 memcpy(&uk.local, &k->local, sizeof(uk.local));
2414 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2416 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2419 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2422 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2423 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2424 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2425 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2426 + userpolicy_type_attrsize();
2429 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2430 int num_migrate, const struct xfrm_kmaddress *k,
2431 const struct xfrm_selector *sel,
2432 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2434 const struct xfrm_migrate *mp;
2435 struct xfrm_userpolicy_id *pol_id;
2436 struct nlmsghdr *nlh;
2439 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2443 pol_id = nlmsg_data(nlh);
2444 /* copy data from selector, dir, and type to the pol_id */
2445 memset(pol_id, 0, sizeof(*pol_id));
2446 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2450 err = copy_to_user_kmaddress(k, skb);
2455 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2459 err = copy_to_user_policy_type(type, skb);
2462 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2463 err = copy_to_user_migrate(mp, skb);
2468 nlmsg_end(skb, nlh);
2472 nlmsg_cancel(skb, nlh);
2476 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2477 const struct xfrm_migrate *m, int num_migrate,
2478 const struct xfrm_kmaddress *k,
2479 const struct xfrm_encap_tmpl *encap)
2481 struct net *net = &init_net;
2482 struct sk_buff *skb;
2485 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2491 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2494 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2497 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2498 const struct xfrm_migrate *m, int num_migrate,
2499 const struct xfrm_kmaddress *k,
2500 const struct xfrm_encap_tmpl *encap)
2502 return -ENOPROTOOPT;
2506 #define XMSGSIZE(type) sizeof(struct type)
2508 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2509 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2510 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2511 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2512 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2513 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2514 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2515 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2516 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2517 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2518 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2519 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2520 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2521 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2522 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2523 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2524 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2525 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2526 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2527 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2528 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2529 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2534 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2535 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2536 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2537 [XFRMA_LASTUSED] = { .type = NLA_U64},
2538 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2539 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2540 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2541 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2542 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2543 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2544 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2545 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2546 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2547 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2548 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2549 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2550 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2551 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2552 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2553 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2554 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2555 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2556 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2557 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2558 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2559 [XFRMA_PROTO] = { .type = NLA_U8 },
2560 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2561 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2562 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2563 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2564 [XFRMA_IF_ID] = { .type = NLA_U32 },
2567 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2568 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2569 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2572 static const struct xfrm_link {
2573 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2574 int (*start)(struct netlink_callback *);
2575 int (*dump)(struct sk_buff *, struct netlink_callback *);
2576 int (*done)(struct netlink_callback *);
2577 const struct nla_policy *nla_pol;
2579 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2580 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2581 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2582 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2583 .dump = xfrm_dump_sa,
2584 .done = xfrm_dump_sa_done },
2585 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2586 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2587 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2588 .start = xfrm_dump_policy_start,
2589 .dump = xfrm_dump_policy,
2590 .done = xfrm_dump_policy_done },
2591 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2592 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2593 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2594 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2595 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2596 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2597 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2598 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2599 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2600 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2601 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2602 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2603 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2604 .nla_pol = xfrma_spd_policy,
2605 .nla_max = XFRMA_SPD_MAX },
2606 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2609 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2610 struct netlink_ext_ack *extack)
2612 struct net *net = sock_net(skb->sk);
2613 struct nlattr *attrs[XFRMA_MAX+1];
2614 const struct xfrm_link *link;
2617 if (in_compat_syscall())
2620 type = nlh->nlmsg_type;
2621 if (type > XFRM_MSG_MAX)
2624 type -= XFRM_MSG_BASE;
2625 link = &xfrm_dispatch[type];
2627 /* All operations require privileges, even GET */
2628 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2631 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2632 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2633 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2634 if (link->dump == NULL)
2638 struct netlink_dump_control c = {
2639 .start = link->start,
2643 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2647 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2648 link->nla_max ? : XFRMA_MAX,
2649 link->nla_pol ? : xfrma_policy, extack);
2653 if (link->doit == NULL)
2656 return link->doit(skb, nlh, attrs);
2659 static void xfrm_netlink_rcv(struct sk_buff *skb)
2661 struct net *net = sock_net(skb->sk);
2663 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2664 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2665 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2668 static inline unsigned int xfrm_expire_msgsize(void)
2670 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2671 + nla_total_size(sizeof(struct xfrm_mark));
2674 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2676 struct xfrm_user_expire *ue;
2677 struct nlmsghdr *nlh;
2680 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2684 ue = nlmsg_data(nlh);
2685 copy_to_user_state(x, &ue->state);
2686 ue->hard = (c->data.hard != 0) ? 1 : 0;
2687 /* clear the padding bytes */
2688 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
2690 err = xfrm_mark_put(skb, &x->mark);
2694 err = xfrm_if_id_put(skb, x->if_id);
2698 nlmsg_end(skb, nlh);
2702 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2704 struct net *net = xs_net(x);
2705 struct sk_buff *skb;
2707 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2711 if (build_expire(skb, x, c) < 0) {
2716 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2719 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2721 struct net *net = xs_net(x);
2722 struct sk_buff *skb;
2725 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2729 err = build_aevent(skb, x, c);
2732 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2735 static int xfrm_notify_sa_flush(const struct km_event *c)
2737 struct net *net = c->net;
2738 struct xfrm_usersa_flush *p;
2739 struct nlmsghdr *nlh;
2740 struct sk_buff *skb;
2741 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2743 skb = nlmsg_new(len, GFP_ATOMIC);
2747 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2753 p = nlmsg_data(nlh);
2754 p->proto = c->data.proto;
2756 nlmsg_end(skb, nlh);
2758 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2761 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
2765 l += nla_total_size(aead_len(x->aead));
2767 l += nla_total_size(sizeof(struct xfrm_algo) +
2768 (x->aalg->alg_key_len + 7) / 8);
2769 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2772 l += nla_total_size(xfrm_alg_len(x->ealg));
2774 l += nla_total_size(sizeof(*x->calg));
2776 l += nla_total_size(sizeof(*x->encap));
2778 l += nla_total_size(sizeof(x->tfcpad));
2780 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2782 l += nla_total_size(sizeof(struct xfrm_replay_state));
2784 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2785 x->security->ctx_len);
2787 l += nla_total_size(sizeof(*x->coaddr));
2788 if (x->props.extra_flags)
2789 l += nla_total_size(sizeof(x->props.extra_flags));
2791 l += nla_total_size(sizeof(x->xso));
2792 if (x->props.smark.v | x->props.smark.m) {
2793 l += nla_total_size(sizeof(x->props.smark.v));
2794 l += nla_total_size(sizeof(x->props.smark.m));
2797 l += nla_total_size(sizeof(x->if_id));
2799 /* Must count x->lastused as it may become non-zero behind our back. */
2800 l += nla_total_size_64bit(sizeof(u64));
2805 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2807 struct net *net = xs_net(x);
2808 struct xfrm_usersa_info *p;
2809 struct xfrm_usersa_id *id;
2810 struct nlmsghdr *nlh;
2811 struct sk_buff *skb;
2812 unsigned int len = xfrm_sa_len(x);
2813 unsigned int headlen;
2816 headlen = sizeof(*p);
2817 if (c->event == XFRM_MSG_DELSA) {
2818 len += nla_total_size(headlen);
2819 headlen = sizeof(*id);
2820 len += nla_total_size(sizeof(struct xfrm_mark));
2822 len += NLMSG_ALIGN(headlen);
2824 skb = nlmsg_new(len, GFP_ATOMIC);
2828 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2833 p = nlmsg_data(nlh);
2834 if (c->event == XFRM_MSG_DELSA) {
2835 struct nlattr *attr;
2837 id = nlmsg_data(nlh);
2838 memset(id, 0, sizeof(*id));
2839 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2840 id->spi = x->id.spi;
2841 id->family = x->props.family;
2842 id->proto = x->id.proto;
2844 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2851 err = copy_to_user_state_extra(x, p, skb);
2855 nlmsg_end(skb, nlh);
2857 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2864 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2868 case XFRM_MSG_EXPIRE:
2869 return xfrm_exp_state_notify(x, c);
2870 case XFRM_MSG_NEWAE:
2871 return xfrm_aevent_state_notify(x, c);
2872 case XFRM_MSG_DELSA:
2873 case XFRM_MSG_UPDSA:
2874 case XFRM_MSG_NEWSA:
2875 return xfrm_notify_sa(x, c);
2876 case XFRM_MSG_FLUSHSA:
2877 return xfrm_notify_sa_flush(c);
2879 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2888 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2889 struct xfrm_policy *xp)
2891 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2892 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2893 + nla_total_size(sizeof(struct xfrm_mark))
2894 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2895 + userpolicy_type_attrsize();
2898 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2899 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2901 __u32 seq = xfrm_get_acqseq();
2902 struct xfrm_user_acquire *ua;
2903 struct nlmsghdr *nlh;
2906 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2910 ua = nlmsg_data(nlh);
2911 memcpy(&ua->id, &x->id, sizeof(ua->id));
2912 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2913 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2914 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2915 ua->aalgos = xt->aalgos;
2916 ua->ealgos = xt->ealgos;
2917 ua->calgos = xt->calgos;
2918 ua->seq = x->km.seq = seq;
2920 err = copy_to_user_tmpl(xp, skb);
2922 err = copy_to_user_state_sec_ctx(x, skb);
2924 err = copy_to_user_policy_type(xp->type, skb);
2926 err = xfrm_mark_put(skb, &xp->mark);
2928 err = xfrm_if_id_put(skb, xp->if_id);
2930 nlmsg_cancel(skb, nlh);
2934 nlmsg_end(skb, nlh);
2938 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2939 struct xfrm_policy *xp)
2941 struct net *net = xs_net(x);
2942 struct sk_buff *skb;
2945 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2949 err = build_acquire(skb, x, xt, xp);
2952 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2955 /* User gives us xfrm_user_policy_info followed by an array of 0
2956 * or more templates.
2958 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2959 u8 *data, int len, int *dir)
2961 struct net *net = sock_net(sk);
2962 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2963 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2964 struct xfrm_policy *xp;
2967 switch (sk->sk_family) {
2969 if (opt != IP_XFRM_POLICY) {
2974 #if IS_ENABLED(CONFIG_IPV6)
2976 if (opt != IPV6_XFRM_POLICY) {
2989 if (len < sizeof(*p) ||
2990 verify_newpolicy_info(p))
2993 nr = ((len - sizeof(*p)) / sizeof(*ut));
2994 if (validate_tmpl(nr, ut, p->sel.family))
2997 if (p->dir > XFRM_POLICY_OUT)
3000 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3006 copy_from_user_policy(xp, p);
3007 xp->type = XFRM_POLICY_TYPE_MAIN;
3008 copy_templates(xp, ut, nr);
3015 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3017 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3018 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3019 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3020 + nla_total_size(sizeof(struct xfrm_mark))
3021 + userpolicy_type_attrsize();
3024 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3025 int dir, const struct km_event *c)
3027 struct xfrm_user_polexpire *upe;
3028 int hard = c->data.hard;
3029 struct nlmsghdr *nlh;
3032 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3036 upe = nlmsg_data(nlh);
3037 copy_to_user_policy(xp, &upe->pol, dir);
3038 err = copy_to_user_tmpl(xp, skb);
3040 err = copy_to_user_sec_ctx(xp, skb);
3042 err = copy_to_user_policy_type(xp->type, skb);
3044 err = xfrm_mark_put(skb, &xp->mark);
3046 err = xfrm_if_id_put(skb, xp->if_id);
3048 nlmsg_cancel(skb, nlh);
3053 nlmsg_end(skb, nlh);
3057 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3059 struct net *net = xp_net(xp);
3060 struct sk_buff *skb;
3063 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3067 err = build_polexpire(skb, xp, dir, c);
3070 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3073 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3075 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3076 struct net *net = xp_net(xp);
3077 struct xfrm_userpolicy_info *p;
3078 struct xfrm_userpolicy_id *id;
3079 struct nlmsghdr *nlh;
3080 struct sk_buff *skb;
3081 unsigned int headlen;
3084 headlen = sizeof(*p);
3085 if (c->event == XFRM_MSG_DELPOLICY) {
3086 len += nla_total_size(headlen);
3087 headlen = sizeof(*id);
3089 len += userpolicy_type_attrsize();
3090 len += nla_total_size(sizeof(struct xfrm_mark));
3091 len += NLMSG_ALIGN(headlen);
3093 skb = nlmsg_new(len, GFP_ATOMIC);
3097 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3102 p = nlmsg_data(nlh);
3103 if (c->event == XFRM_MSG_DELPOLICY) {
3104 struct nlattr *attr;
3106 id = nlmsg_data(nlh);
3107 memset(id, 0, sizeof(*id));
3110 id->index = xp->index;
3112 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3114 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3122 copy_to_user_policy(xp, p, dir);
3123 err = copy_to_user_tmpl(xp, skb);
3125 err = copy_to_user_policy_type(xp->type, skb);
3127 err = xfrm_mark_put(skb, &xp->mark);
3129 err = xfrm_if_id_put(skb, xp->if_id);
3133 nlmsg_end(skb, nlh);
3135 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3142 static int xfrm_notify_policy_flush(const struct km_event *c)
3144 struct net *net = c->net;
3145 struct nlmsghdr *nlh;
3146 struct sk_buff *skb;
3149 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3153 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3157 err = copy_to_user_policy_type(c->data.type, skb);
3161 nlmsg_end(skb, nlh);
3163 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3170 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3174 case XFRM_MSG_NEWPOLICY:
3175 case XFRM_MSG_UPDPOLICY:
3176 case XFRM_MSG_DELPOLICY:
3177 return xfrm_notify_policy(xp, dir, c);
3178 case XFRM_MSG_FLUSHPOLICY:
3179 return xfrm_notify_policy_flush(c);
3180 case XFRM_MSG_POLEXPIRE:
3181 return xfrm_exp_policy_notify(xp, dir, c);
3183 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3191 static inline unsigned int xfrm_report_msgsize(void)
3193 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3196 static int build_report(struct sk_buff *skb, u8 proto,
3197 struct xfrm_selector *sel, xfrm_address_t *addr)
3199 struct xfrm_user_report *ur;
3200 struct nlmsghdr *nlh;
3202 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3206 ur = nlmsg_data(nlh);
3208 memcpy(&ur->sel, sel, sizeof(ur->sel));
3211 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3213 nlmsg_cancel(skb, nlh);
3217 nlmsg_end(skb, nlh);
3221 static int xfrm_send_report(struct net *net, u8 proto,
3222 struct xfrm_selector *sel, xfrm_address_t *addr)
3224 struct sk_buff *skb;
3227 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3231 err = build_report(skb, proto, sel, addr);
3234 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3237 static inline unsigned int xfrm_mapping_msgsize(void)
3239 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3242 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3243 xfrm_address_t *new_saddr, __be16 new_sport)
3245 struct xfrm_user_mapping *um;
3246 struct nlmsghdr *nlh;
3248 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3252 um = nlmsg_data(nlh);
3254 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3255 um->id.spi = x->id.spi;
3256 um->id.family = x->props.family;
3257 um->id.proto = x->id.proto;
3258 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3259 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3260 um->new_sport = new_sport;
3261 um->old_sport = x->encap->encap_sport;
3262 um->reqid = x->props.reqid;
3264 nlmsg_end(skb, nlh);
3268 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3271 struct net *net = xs_net(x);
3272 struct sk_buff *skb;
3275 if (x->id.proto != IPPROTO_ESP)
3281 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3285 err = build_mapping(skb, x, ipaddr, sport);
3288 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3291 static bool xfrm_is_alive(const struct km_event *c)
3293 return (bool)xfrm_acquire_is_on(c->net);
3296 static struct xfrm_mgr netlink_mgr = {
3297 .notify = xfrm_send_state_notify,
3298 .acquire = xfrm_send_acquire,
3299 .compile_policy = xfrm_compile_policy,
3300 .notify_policy = xfrm_send_policy_notify,
3301 .report = xfrm_send_report,
3302 .migrate = xfrm_send_migrate,
3303 .new_mapping = xfrm_send_mapping,
3304 .is_alive = xfrm_is_alive,
3307 static int __net_init xfrm_user_net_init(struct net *net)
3310 struct netlink_kernel_cfg cfg = {
3311 .groups = XFRMNLGRP_MAX,
3312 .input = xfrm_netlink_rcv,
3315 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3318 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3319 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3323 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3326 list_for_each_entry(net, net_exit_list, exit_list)
3327 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3329 list_for_each_entry(net, net_exit_list, exit_list)
3330 netlink_kernel_release(net->xfrm.nlsk_stash);
3333 static struct pernet_operations xfrm_user_net_ops = {
3334 .init = xfrm_user_net_init,
3335 .exit_batch = xfrm_user_net_exit,
3338 static int __init xfrm_user_init(void)
3342 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3344 rv = register_pernet_subsys(&xfrm_user_net_ops);
3347 rv = xfrm_register_km(&netlink_mgr);
3349 unregister_pernet_subsys(&xfrm_user_net_ops);
3353 static void __exit xfrm_user_exit(void)
3355 xfrm_unregister_km(&netlink_mgr);
3356 unregister_pernet_subsys(&xfrm_user_net_ops);
3359 module_init(xfrm_user_init);
3360 module_exit(xfrm_user_exit);
3361 MODULE_LICENSE("GPL");
3362 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);