1 // SPDX-License-Identifier: GPL-2.0-only
2 /* xfrm_user.c: User interface to configure xfrm engine.
4 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
8 * Kazunori MIYAZAWA @USAGI
9 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
14 #include <linux/crypto.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/socket.h>
20 #include <linux/string.h>
21 #include <linux/net.h>
22 #include <linux/skbuff.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
31 #include <linux/uaccess.h>
32 #if IS_ENABLED(CONFIG_IPV6)
33 #include <linux/in6.h>
35 #include <asm/unaligned.h>
37 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
39 struct nlattr *rt = attrs[type];
40 struct xfrm_algo *algp;
46 if (nla_len(rt) < (int)xfrm_alg_len(algp))
59 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
63 static int verify_auth_trunc(struct nlattr **attrs)
65 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
66 struct xfrm_algo_auth *algp;
72 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
75 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
79 static int verify_aead(struct nlattr **attrs)
81 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
82 struct xfrm_algo_aead *algp;
88 if (nla_len(rt) < (int)aead_len(algp))
91 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
95 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
96 xfrm_address_t **addrp)
98 struct nlattr *rt = attrs[type];
101 *addrp = nla_data(rt);
104 static inline int verify_sec_ctx_len(struct nlattr **attrs)
106 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
107 struct xfrm_user_sec_ctx *uctx;
113 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
119 static inline int verify_replay(struct xfrm_usersa_info *p,
120 struct nlattr **attrs)
122 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
123 struct xfrm_replay_state_esn *rs;
126 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
133 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
137 /* As only ESP and AH support ESN feature. */
138 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
141 if (p->replay_window != 0)
147 static int verify_newsa_info(struct xfrm_usersa_info *p,
148 struct nlattr **attrs)
155 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
161 #if IS_ENABLED(CONFIG_IPV6)
162 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
176 switch (p->id.proto) {
178 if ((!attrs[XFRMA_ALG_AUTH] &&
179 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
180 attrs[XFRMA_ALG_AEAD] ||
181 attrs[XFRMA_ALG_CRYPT] ||
182 attrs[XFRMA_ALG_COMP] ||
188 if (attrs[XFRMA_ALG_COMP])
190 if (!attrs[XFRMA_ALG_AUTH] &&
191 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
192 !attrs[XFRMA_ALG_CRYPT] &&
193 !attrs[XFRMA_ALG_AEAD])
195 if ((attrs[XFRMA_ALG_AUTH] ||
196 attrs[XFRMA_ALG_AUTH_TRUNC] ||
197 attrs[XFRMA_ALG_CRYPT]) &&
198 attrs[XFRMA_ALG_AEAD])
200 if (attrs[XFRMA_TFCPAD] &&
201 p->mode != XFRM_MODE_TUNNEL)
206 if (!attrs[XFRMA_ALG_COMP] ||
207 attrs[XFRMA_ALG_AEAD] ||
208 attrs[XFRMA_ALG_AUTH] ||
209 attrs[XFRMA_ALG_AUTH_TRUNC] ||
210 attrs[XFRMA_ALG_CRYPT] ||
211 attrs[XFRMA_TFCPAD] ||
212 (ntohl(p->id.spi) >= 0x10000))
216 #if IS_ENABLED(CONFIG_IPV6)
217 case IPPROTO_DSTOPTS:
218 case IPPROTO_ROUTING:
219 if (attrs[XFRMA_ALG_COMP] ||
220 attrs[XFRMA_ALG_AUTH] ||
221 attrs[XFRMA_ALG_AUTH_TRUNC] ||
222 attrs[XFRMA_ALG_AEAD] ||
223 attrs[XFRMA_ALG_CRYPT] ||
224 attrs[XFRMA_ENCAP] ||
225 attrs[XFRMA_SEC_CTX] ||
226 attrs[XFRMA_TFCPAD] ||
227 !attrs[XFRMA_COADDR])
236 if ((err = verify_aead(attrs)))
238 if ((err = verify_auth_trunc(attrs)))
240 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
242 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
244 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
246 if ((err = verify_sec_ctx_len(attrs)))
248 if ((err = verify_replay(p, attrs)))
253 case XFRM_MODE_TRANSPORT:
254 case XFRM_MODE_TUNNEL:
255 case XFRM_MODE_ROUTEOPTIMIZATION:
269 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
270 struct xfrm_algo_desc *(*get_byname)(const char *, int),
273 struct xfrm_algo *p, *ualg;
274 struct xfrm_algo_desc *algo;
279 ualg = nla_data(rta);
281 algo = get_byname(ualg->alg_name, 1);
284 *props = algo->desc.sadb_alg_id;
286 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
290 strcpy(p->alg_name, algo->name);
295 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
297 struct xfrm_algo *p, *ualg;
298 struct xfrm_algo_desc *algo;
303 ualg = nla_data(rta);
305 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
308 x->props.ealgo = algo->desc.sadb_alg_id;
310 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
314 strcpy(p->alg_name, algo->name);
316 x->geniv = algo->uinfo.encr.geniv;
320 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
323 struct xfrm_algo *ualg;
324 struct xfrm_algo_auth *p;
325 struct xfrm_algo_desc *algo;
330 ualg = nla_data(rta);
332 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
335 *props = algo->desc.sadb_alg_id;
337 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
341 strcpy(p->alg_name, algo->name);
342 p->alg_key_len = ualg->alg_key_len;
343 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
344 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
350 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
353 struct xfrm_algo_auth *p, *ualg;
354 struct xfrm_algo_desc *algo;
359 ualg = nla_data(rta);
361 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
364 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
366 *props = algo->desc.sadb_alg_id;
368 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
372 strcpy(p->alg_name, algo->name);
373 if (!p->alg_trunc_len)
374 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
380 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
382 struct xfrm_algo_aead *p, *ualg;
383 struct xfrm_algo_desc *algo;
388 ualg = nla_data(rta);
390 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
393 x->props.ealgo = algo->desc.sadb_alg_id;
395 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
399 strcpy(p->alg_name, algo->name);
401 x->geniv = algo->uinfo.aead.geniv;
405 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
408 struct xfrm_replay_state_esn *up;
411 if (!replay_esn || !rp)
415 ulen = xfrm_replay_state_esn_len(up);
417 /* Check the overall length and the internal bitmap length to avoid
418 * potential overflow. */
419 if (nla_len(rp) < (int)ulen ||
420 xfrm_replay_state_esn_len(replay_esn) != ulen ||
421 replay_esn->bmp_len != up->bmp_len)
424 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
430 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
431 struct xfrm_replay_state_esn **preplay_esn,
434 struct xfrm_replay_state_esn *p, *pp, *up;
435 unsigned int klen, ulen;
441 klen = xfrm_replay_state_esn_len(up);
442 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
444 p = kzalloc(klen, GFP_KERNEL);
448 pp = kzalloc(klen, GFP_KERNEL);
455 memcpy(pp, up, ulen);
463 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
465 unsigned int len = 0;
468 len += sizeof(struct xfrm_user_sec_ctx);
469 len += xfrm_ctx->ctx_len;
474 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
476 memcpy(&x->id, &p->id, sizeof(x->id));
477 memcpy(&x->sel, &p->sel, sizeof(x->sel));
478 memcpy(&x->lft, &p->lft, sizeof(x->lft));
479 x->props.mode = p->mode;
480 x->props.replay_window = min_t(unsigned int, p->replay_window,
481 sizeof(x->replay.bitmap) * 8);
482 x->props.reqid = p->reqid;
483 x->props.family = p->family;
484 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
485 x->props.flags = p->flags;
487 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
488 x->sel.family = p->family;
492 * someday when pfkey also has support, we could have the code
493 * somehow made shareable and move it to xfrm_state.c - JHS
496 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
499 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
500 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
501 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
502 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
503 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
506 struct xfrm_replay_state_esn *replay_esn;
507 replay_esn = nla_data(re);
508 memcpy(x->replay_esn, replay_esn,
509 xfrm_replay_state_esn_len(replay_esn));
510 memcpy(x->preplay_esn, replay_esn,
511 xfrm_replay_state_esn_len(replay_esn));
515 struct xfrm_replay_state *replay;
516 replay = nla_data(rp);
517 memcpy(&x->replay, replay, sizeof(*replay));
518 memcpy(&x->preplay, replay, sizeof(*replay));
522 struct xfrm_lifetime_cur *ltime;
523 ltime = nla_data(lt);
524 x->curlft.bytes = ltime->bytes;
525 x->curlft.packets = ltime->packets;
526 x->curlft.add_time = ltime->add_time;
527 x->curlft.use_time = ltime->use_time;
531 x->replay_maxage = nla_get_u32(et);
534 x->replay_maxdiff = nla_get_u32(rt);
537 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
539 if (attrs[XFRMA_SET_MARK]) {
540 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
541 if (attrs[XFRMA_SET_MARK_MASK])
542 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
550 static struct xfrm_state *xfrm_state_construct(struct net *net,
551 struct xfrm_usersa_info *p,
552 struct nlattr **attrs,
555 struct xfrm_state *x = xfrm_state_alloc(net);
561 copy_from_user_state(x, p);
563 if (attrs[XFRMA_SA_EXTRA_FLAGS])
564 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
566 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
568 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
569 attrs[XFRMA_ALG_AUTH_TRUNC])))
571 if (!x->props.aalgo) {
572 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
573 attrs[XFRMA_ALG_AUTH])))
576 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
578 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
579 xfrm_calg_get_byname,
580 attrs[XFRMA_ALG_COMP])))
583 if (attrs[XFRMA_ENCAP]) {
584 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
585 sizeof(*x->encap), GFP_KERNEL);
586 if (x->encap == NULL)
590 if (attrs[XFRMA_TFCPAD])
591 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
593 if (attrs[XFRMA_COADDR]) {
594 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
595 sizeof(*x->coaddr), GFP_KERNEL);
596 if (x->coaddr == NULL)
600 xfrm_mark_get(attrs, &x->mark);
602 xfrm_smark_init(attrs, &x->props.smark);
604 if (attrs[XFRMA_IF_ID])
605 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
607 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
611 if (attrs[XFRMA_SEC_CTX]) {
612 err = security_xfrm_state_alloc(x,
613 nla_data(attrs[XFRMA_SEC_CTX]));
618 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
619 attrs[XFRMA_REPLAY_ESN_VAL])))
623 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
624 /* sysctl_xfrm_aevent_etime is in 100ms units */
625 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
627 if ((err = xfrm_init_replay(x)))
630 /* override default values from above */
631 xfrm_update_ae_params(x, attrs, 0);
633 /* configure the hardware if offload is requested */
634 if (attrs[XFRMA_OFFLOAD_DEV]) {
635 err = xfrm_dev_state_add(net, x,
636 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
644 x->km.state = XFRM_STATE_DEAD;
651 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
652 struct nlattr **attrs)
654 struct net *net = sock_net(skb->sk);
655 struct xfrm_usersa_info *p = nlmsg_data(nlh);
656 struct xfrm_state *x;
660 err = verify_newsa_info(p, attrs);
664 x = xfrm_state_construct(net, p, attrs, &err);
669 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
670 err = xfrm_state_add(x);
672 err = xfrm_state_update(x);
674 xfrm_audit_state_add(x, err ? 0 : 1, true);
677 x->km.state = XFRM_STATE_DEAD;
678 xfrm_dev_state_delete(x);
683 if (x->km.state == XFRM_STATE_VOID)
684 x->km.state = XFRM_STATE_VALID;
686 c.seq = nlh->nlmsg_seq;
687 c.portid = nlh->nlmsg_pid;
688 c.event = nlh->nlmsg_type;
690 km_state_notify(x, &c);
696 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
697 struct xfrm_usersa_id *p,
698 struct nlattr **attrs,
701 struct xfrm_state *x = NULL;
704 u32 mark = xfrm_mark_get(attrs, &m);
706 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
708 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
710 xfrm_address_t *saddr = NULL;
712 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
719 x = xfrm_state_lookup_byaddr(net, mark,
721 p->proto, p->family);
730 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
731 struct nlattr **attrs)
733 struct net *net = sock_net(skb->sk);
734 struct xfrm_state *x;
737 struct xfrm_usersa_id *p = nlmsg_data(nlh);
739 x = xfrm_user_state_lookup(net, p, attrs, &err);
743 if ((err = security_xfrm_state_delete(x)) != 0)
746 if (xfrm_state_kern(x)) {
751 err = xfrm_state_delete(x);
756 c.seq = nlh->nlmsg_seq;
757 c.portid = nlh->nlmsg_pid;
758 c.event = nlh->nlmsg_type;
759 km_state_notify(x, &c);
762 xfrm_audit_state_delete(x, err ? 0 : 1, true);
767 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
769 memset(p, 0, sizeof(*p));
770 memcpy(&p->id, &x->id, sizeof(p->id));
771 memcpy(&p->sel, &x->sel, sizeof(p->sel));
772 memcpy(&p->lft, &x->lft, sizeof(p->lft));
773 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
774 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
775 put_unaligned(x->stats.replay, &p->stats.replay);
776 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
777 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
778 p->mode = x->props.mode;
779 p->replay_window = x->props.replay_window;
780 p->reqid = x->props.reqid;
781 p->family = x->props.family;
782 p->flags = x->props.flags;
786 struct xfrm_dump_info {
787 struct sk_buff *in_skb;
788 struct sk_buff *out_skb;
793 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
795 struct xfrm_user_sec_ctx *uctx;
797 int ctx_size = sizeof(*uctx) + s->ctx_len;
799 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
803 uctx = nla_data(attr);
804 uctx->exttype = XFRMA_SEC_CTX;
805 uctx->len = ctx_size;
806 uctx->ctx_doi = s->ctx_doi;
807 uctx->ctx_alg = s->ctx_alg;
808 uctx->ctx_len = s->ctx_len;
809 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
814 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
816 struct xfrm_user_offload *xuo;
819 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
823 xuo = nla_data(attr);
824 memset(xuo, 0, sizeof(*xuo));
825 xuo->ifindex = xso->dev->ifindex;
826 xuo->flags = xso->flags;
831 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
833 struct xfrm_algo *algo;
836 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
837 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
841 algo = nla_data(nla);
842 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
843 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
844 algo->alg_key_len = auth->alg_key_len;
849 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
854 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
856 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
861 /* Don't change this without updating xfrm_sa_len! */
862 static int copy_to_user_state_extra(struct xfrm_state *x,
863 struct xfrm_usersa_info *p,
868 copy_to_user_state(x, p);
870 if (x->props.extra_flags) {
871 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
872 x->props.extra_flags);
878 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
883 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
889 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
894 ret = copy_to_user_auth(x->aalg, skb);
896 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
897 xfrm_alg_auth_len(x->aalg), x->aalg);
902 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
907 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
912 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
917 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
921 ret = xfrm_mark_put(skb, &x->mark);
925 ret = xfrm_smark_put(skb, &x->props.smark);
930 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
931 xfrm_replay_state_esn_len(x->replay_esn),
934 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
939 ret = copy_user_offload(&x->xso, skb);
943 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
948 ret = copy_sec_ctx(x->security, skb);
953 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
955 struct xfrm_dump_info *sp = ptr;
956 struct sk_buff *in_skb = sp->in_skb;
957 struct sk_buff *skb = sp->out_skb;
958 struct xfrm_usersa_info *p;
959 struct nlmsghdr *nlh;
962 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
963 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
969 err = copy_to_user_state_extra(x, p, skb);
971 nlmsg_cancel(skb, nlh);
978 static int xfrm_dump_sa_done(struct netlink_callback *cb)
980 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
981 struct sock *sk = cb->skb->sk;
982 struct net *net = sock_net(sk);
985 xfrm_state_walk_done(walk, net);
989 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
990 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
992 struct net *net = sock_net(skb->sk);
993 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
994 struct xfrm_dump_info info;
996 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
997 sizeof(cb->args) - sizeof(cb->args[0]));
999 info.in_skb = cb->skb;
1001 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1002 info.nlmsg_flags = NLM_F_MULTI;
1005 struct nlattr *attrs[XFRMA_MAX+1];
1006 struct xfrm_address_filter *filter = NULL;
1010 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1011 xfrma_policy, cb->extack);
1015 if (attrs[XFRMA_ADDRESS_FILTER]) {
1016 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1017 sizeof(*filter), GFP_KERNEL);
1022 if (attrs[XFRMA_PROTO])
1023 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1025 xfrm_state_walk_init(walk, proto, filter);
1029 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1034 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1035 struct xfrm_state *x, u32 seq)
1037 struct xfrm_dump_info info;
1038 struct sk_buff *skb;
1041 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1043 return ERR_PTR(-ENOMEM);
1045 info.in_skb = in_skb;
1047 info.nlmsg_seq = seq;
1048 info.nlmsg_flags = 0;
1050 err = dump_one_state(x, 0, &info);
1053 return ERR_PTR(err);
1059 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1060 * Must be called with RCU read lock.
1062 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1063 u32 pid, unsigned int group)
1065 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1072 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1075 static inline unsigned int xfrm_spdinfo_msgsize(void)
1077 return NLMSG_ALIGN(4)
1078 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1079 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1080 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1081 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1084 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1085 u32 portid, u32 seq, u32 flags)
1087 struct xfrmk_spdinfo si;
1088 struct xfrmu_spdinfo spc;
1089 struct xfrmu_spdhinfo sph;
1090 struct xfrmu_spdhthresh spt4, spt6;
1091 struct nlmsghdr *nlh;
1096 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1097 if (nlh == NULL) /* shouldn't really happen ... */
1100 f = nlmsg_data(nlh);
1102 xfrm_spd_getinfo(net, &si);
1103 spc.incnt = si.incnt;
1104 spc.outcnt = si.outcnt;
1105 spc.fwdcnt = si.fwdcnt;
1106 spc.inscnt = si.inscnt;
1107 spc.outscnt = si.outscnt;
1108 spc.fwdscnt = si.fwdscnt;
1109 sph.spdhcnt = si.spdhcnt;
1110 sph.spdhmcnt = si.spdhmcnt;
1113 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1115 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1116 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1117 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1118 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1119 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1121 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1123 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1125 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1127 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1129 nlmsg_cancel(skb, nlh);
1133 nlmsg_end(skb, nlh);
1137 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1138 struct nlattr **attrs)
1140 struct net *net = sock_net(skb->sk);
1141 struct xfrmu_spdhthresh *thresh4 = NULL;
1142 struct xfrmu_spdhthresh *thresh6 = NULL;
1144 /* selector prefixlen thresholds to hash policies */
1145 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1146 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1148 if (nla_len(rta) < sizeof(*thresh4))
1150 thresh4 = nla_data(rta);
1151 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1154 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1155 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1157 if (nla_len(rta) < sizeof(*thresh6))
1159 thresh6 = nla_data(rta);
1160 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1164 if (thresh4 || thresh6) {
1165 write_seqlock(&net->xfrm.policy_hthresh.lock);
1167 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1168 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1171 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1172 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1174 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1176 xfrm_policy_hash_rebuild(net);
1182 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1183 struct nlattr **attrs)
1185 struct net *net = sock_net(skb->sk);
1186 struct sk_buff *r_skb;
1187 u32 *flags = nlmsg_data(nlh);
1188 u32 sportid = NETLINK_CB(skb).portid;
1189 u32 seq = nlh->nlmsg_seq;
1192 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1196 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1199 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1202 static inline unsigned int xfrm_sadinfo_msgsize(void)
1204 return NLMSG_ALIGN(4)
1205 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1206 + nla_total_size(4); /* XFRMA_SAD_CNT */
1209 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1210 u32 portid, u32 seq, u32 flags)
1212 struct xfrmk_sadinfo si;
1213 struct xfrmu_sadhinfo sh;
1214 struct nlmsghdr *nlh;
1218 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1219 if (nlh == NULL) /* shouldn't really happen ... */
1222 f = nlmsg_data(nlh);
1224 xfrm_sad_getinfo(net, &si);
1226 sh.sadhmcnt = si.sadhmcnt;
1227 sh.sadhcnt = si.sadhcnt;
1229 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1231 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1233 nlmsg_cancel(skb, nlh);
1237 nlmsg_end(skb, nlh);
1241 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1242 struct nlattr **attrs)
1244 struct net *net = sock_net(skb->sk);
1245 struct sk_buff *r_skb;
1246 u32 *flags = nlmsg_data(nlh);
1247 u32 sportid = NETLINK_CB(skb).portid;
1248 u32 seq = nlh->nlmsg_seq;
1251 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1255 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1258 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1261 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1262 struct nlattr **attrs)
1264 struct net *net = sock_net(skb->sk);
1265 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1266 struct xfrm_state *x;
1267 struct sk_buff *resp_skb;
1270 x = xfrm_user_state_lookup(net, p, attrs, &err);
1274 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1275 if (IS_ERR(resp_skb)) {
1276 err = PTR_ERR(resp_skb);
1278 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1285 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1286 struct nlattr **attrs)
1288 struct net *net = sock_net(skb->sk);
1289 struct xfrm_state *x;
1290 struct xfrm_userspi_info *p;
1291 struct sk_buff *resp_skb;
1292 xfrm_address_t *daddr;
1299 p = nlmsg_data(nlh);
1300 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1304 family = p->info.family;
1305 daddr = &p->info.id.daddr;
1309 mark = xfrm_mark_get(attrs, &m);
1311 if (attrs[XFRMA_IF_ID])
1312 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1315 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1316 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1323 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1324 if_id, p->info.id.proto, daddr,
1331 err = xfrm_alloc_spi(x, p->min, p->max);
1335 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1336 if (IS_ERR(resp_skb)) {
1337 err = PTR_ERR(resp_skb);
1341 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1349 static int verify_policy_dir(u8 dir)
1352 case XFRM_POLICY_IN:
1353 case XFRM_POLICY_OUT:
1354 case XFRM_POLICY_FWD:
1364 static int verify_policy_type(u8 type)
1367 case XFRM_POLICY_TYPE_MAIN:
1368 #ifdef CONFIG_XFRM_SUB_POLICY
1369 case XFRM_POLICY_TYPE_SUB:
1380 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1385 case XFRM_SHARE_ANY:
1386 case XFRM_SHARE_SESSION:
1387 case XFRM_SHARE_USER:
1388 case XFRM_SHARE_UNIQUE:
1395 switch (p->action) {
1396 case XFRM_POLICY_ALLOW:
1397 case XFRM_POLICY_BLOCK:
1404 switch (p->sel.family) {
1406 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1412 #if IS_ENABLED(CONFIG_IPV6)
1413 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1418 return -EAFNOSUPPORT;
1425 ret = verify_policy_dir(p->dir);
1428 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
1434 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1436 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1437 struct xfrm_user_sec_ctx *uctx;
1442 uctx = nla_data(rt);
1443 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1446 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1452 for (i = 0; i < nr; i++, ut++) {
1453 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1455 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1456 memcpy(&t->saddr, &ut->saddr,
1457 sizeof(xfrm_address_t));
1458 t->reqid = ut->reqid;
1460 t->share = ut->share;
1461 t->optional = ut->optional;
1462 t->aalgos = ut->aalgos;
1463 t->ealgos = ut->ealgos;
1464 t->calgos = ut->calgos;
1465 /* If all masks are ~0, then we allow all algorithms. */
1466 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1467 t->encap_family = ut->family;
1471 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1476 if (nr > XFRM_MAX_DEPTH)
1479 prev_family = family;
1481 for (i = 0; i < nr; i++) {
1482 /* We never validated the ut->family value, so many
1483 * applications simply leave it at zero. The check was
1484 * never made and ut->family was ignored because all
1485 * templates could be assumed to have the same family as
1486 * the policy itself. Now that we will have ipv4-in-ipv6
1487 * and ipv6-in-ipv4 tunnels, this is no longer true.
1490 ut[i].family = family;
1492 switch (ut[i].mode) {
1493 case XFRM_MODE_TUNNEL:
1494 case XFRM_MODE_BEET:
1497 if (ut[i].family != prev_family)
1501 if (ut[i].mode >= XFRM_MODE_MAX)
1504 prev_family = ut[i].family;
1506 switch (ut[i].family) {
1509 #if IS_ENABLED(CONFIG_IPV6)
1517 if (!xfrm_id_proto_valid(ut[i].id.proto))
1524 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1526 struct nlattr *rt = attrs[XFRMA_TMPL];
1531 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1532 int nr = nla_len(rt) / sizeof(*utmpl);
1535 err = validate_tmpl(nr, utmpl, pol->family);
1539 copy_templates(pol, utmpl, nr);
1544 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1546 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1547 struct xfrm_userpolicy_type *upt;
1548 u8 type = XFRM_POLICY_TYPE_MAIN;
1556 err = verify_policy_type(type);
1564 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1566 xp->priority = p->priority;
1567 xp->index = p->index;
1568 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1569 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1570 xp->action = p->action;
1571 xp->flags = p->flags;
1572 xp->family = p->sel.family;
1573 /* XXX xp->share = p->share; */
1576 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1578 memset(p, 0, sizeof(*p));
1579 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1580 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1581 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1582 p->priority = xp->priority;
1583 p->index = xp->index;
1584 p->sel.family = xp->family;
1586 p->action = xp->action;
1587 p->flags = xp->flags;
1588 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1591 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1593 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1601 copy_from_user_policy(xp, p);
1603 err = copy_from_user_policy_type(&xp->type, attrs);
1607 if (!(err = copy_from_user_tmpl(xp, attrs)))
1608 err = copy_from_user_sec_ctx(xp, attrs);
1612 xfrm_mark_get(attrs, &xp->mark);
1614 if (attrs[XFRMA_IF_ID])
1615 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1621 xfrm_policy_destroy(xp);
1625 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1626 struct nlattr **attrs)
1628 struct net *net = sock_net(skb->sk);
1629 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1630 struct xfrm_policy *xp;
1635 err = verify_newpolicy_info(p);
1638 err = verify_sec_ctx_len(attrs);
1642 xp = xfrm_policy_construct(net, p, attrs, &err);
1646 /* shouldn't excl be based on nlh flags??
1647 * Aha! this is anti-netlink really i.e more pfkey derived
1648 * in netlink excl is a flag and you wouldnt need
1649 * a type XFRM_MSG_UPDPOLICY - JHS */
1650 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1651 err = xfrm_policy_insert(p->dir, xp, excl);
1652 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1655 security_xfrm_policy_free(xp->security);
1660 c.event = nlh->nlmsg_type;
1661 c.seq = nlh->nlmsg_seq;
1662 c.portid = nlh->nlmsg_pid;
1663 km_policy_notify(xp, p->dir, &c);
1670 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1672 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1675 if (xp->xfrm_nr == 0)
1678 for (i = 0; i < xp->xfrm_nr; i++) {
1679 struct xfrm_user_tmpl *up = &vec[i];
1680 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1682 memset(up, 0, sizeof(*up));
1683 memcpy(&up->id, &kp->id, sizeof(up->id));
1684 up->family = kp->encap_family;
1685 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1686 up->reqid = kp->reqid;
1687 up->mode = kp->mode;
1688 up->share = kp->share;
1689 up->optional = kp->optional;
1690 up->aalgos = kp->aalgos;
1691 up->ealgos = kp->ealgos;
1692 up->calgos = kp->calgos;
1695 return nla_put(skb, XFRMA_TMPL,
1696 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1699 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1702 return copy_sec_ctx(x->security, skb);
1707 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1710 return copy_sec_ctx(xp->security, skb);
1713 static inline unsigned int userpolicy_type_attrsize(void)
1715 #ifdef CONFIG_XFRM_SUB_POLICY
1716 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1722 #ifdef CONFIG_XFRM_SUB_POLICY
1723 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1725 struct xfrm_userpolicy_type upt;
1727 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1728 memset(&upt, 0, sizeof(upt));
1731 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1735 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1741 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1743 struct xfrm_dump_info *sp = ptr;
1744 struct xfrm_userpolicy_info *p;
1745 struct sk_buff *in_skb = sp->in_skb;
1746 struct sk_buff *skb = sp->out_skb;
1747 struct nlmsghdr *nlh;
1750 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1751 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1755 p = nlmsg_data(nlh);
1756 copy_to_user_policy(xp, p, dir);
1757 err = copy_to_user_tmpl(xp, skb);
1759 err = copy_to_user_sec_ctx(xp, skb);
1761 err = copy_to_user_policy_type(xp->type, skb);
1763 err = xfrm_mark_put(skb, &xp->mark);
1765 err = xfrm_if_id_put(skb, xp->if_id);
1767 nlmsg_cancel(skb, nlh);
1770 nlmsg_end(skb, nlh);
1774 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1776 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1777 struct net *net = sock_net(cb->skb->sk);
1779 xfrm_policy_walk_done(walk, net);
1783 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1785 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1787 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1789 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1793 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1795 struct net *net = sock_net(skb->sk);
1796 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1797 struct xfrm_dump_info info;
1799 info.in_skb = cb->skb;
1801 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1802 info.nlmsg_flags = NLM_F_MULTI;
1804 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1809 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1810 struct xfrm_policy *xp,
1813 struct xfrm_dump_info info;
1814 struct sk_buff *skb;
1817 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1819 return ERR_PTR(-ENOMEM);
1821 info.in_skb = in_skb;
1823 info.nlmsg_seq = seq;
1824 info.nlmsg_flags = 0;
1826 err = dump_one_policy(xp, dir, 0, &info);
1829 return ERR_PTR(err);
1835 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1836 struct nlattr **attrs)
1838 struct net *net = sock_net(skb->sk);
1839 struct xfrm_policy *xp;
1840 struct xfrm_userpolicy_id *p;
1841 u8 type = XFRM_POLICY_TYPE_MAIN;
1846 u32 mark = xfrm_mark_get(attrs, &m);
1849 p = nlmsg_data(nlh);
1850 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1852 err = copy_from_user_policy_type(&type, attrs);
1856 err = verify_policy_dir(p->dir);
1860 if (attrs[XFRMA_IF_ID])
1861 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1864 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1866 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1867 struct xfrm_sec_ctx *ctx;
1869 err = verify_sec_ctx_len(attrs);
1875 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1877 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1881 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1883 security_xfrm_policy_free(ctx);
1889 struct sk_buff *resp_skb;
1891 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1892 if (IS_ERR(resp_skb)) {
1893 err = PTR_ERR(resp_skb);
1895 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1896 NETLINK_CB(skb).portid);
1899 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1904 c.data.byid = p->index;
1905 c.event = nlh->nlmsg_type;
1906 c.seq = nlh->nlmsg_seq;
1907 c.portid = nlh->nlmsg_pid;
1908 km_policy_notify(xp, p->dir, &c);
1916 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1917 struct nlattr **attrs)
1919 struct net *net = sock_net(skb->sk);
1921 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1924 err = xfrm_state_flush(net, p->proto, true, false);
1926 if (err == -ESRCH) /* empty table */
1930 c.data.proto = p->proto;
1931 c.event = nlh->nlmsg_type;
1932 c.seq = nlh->nlmsg_seq;
1933 c.portid = nlh->nlmsg_pid;
1935 km_state_notify(NULL, &c);
1940 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
1942 unsigned int replay_size = x->replay_esn ?
1943 xfrm_replay_state_esn_len(x->replay_esn) :
1944 sizeof(struct xfrm_replay_state);
1946 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1947 + nla_total_size(replay_size)
1948 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1949 + nla_total_size(sizeof(struct xfrm_mark))
1950 + nla_total_size(4) /* XFRM_AE_RTHR */
1951 + nla_total_size(4); /* XFRM_AE_ETHR */
1954 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1956 struct xfrm_aevent_id *id;
1957 struct nlmsghdr *nlh;
1960 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1964 id = nlmsg_data(nlh);
1965 memset(&id->sa_id, 0, sizeof(id->sa_id));
1966 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1967 id->sa_id.spi = x->id.spi;
1968 id->sa_id.family = x->props.family;
1969 id->sa_id.proto = x->id.proto;
1970 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1971 id->reqid = x->props.reqid;
1972 id->flags = c->data.aevent;
1974 if (x->replay_esn) {
1975 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1976 xfrm_replay_state_esn_len(x->replay_esn),
1979 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1984 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1989 if (id->flags & XFRM_AE_RTHR) {
1990 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1994 if (id->flags & XFRM_AE_ETHR) {
1995 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1996 x->replay_maxage * 10 / HZ);
2000 err = xfrm_mark_put(skb, &x->mark);
2004 err = xfrm_if_id_put(skb, x->if_id);
2008 nlmsg_end(skb, nlh);
2012 nlmsg_cancel(skb, nlh);
2016 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2017 struct nlattr **attrs)
2019 struct net *net = sock_net(skb->sk);
2020 struct xfrm_state *x;
2021 struct sk_buff *r_skb;
2026 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2027 struct xfrm_usersa_id *id = &p->sa_id;
2029 mark = xfrm_mark_get(attrs, &m);
2031 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2035 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2036 if (r_skb == NULL) {
2042 * XXX: is this lock really needed - none of the other
2043 * gets lock (the concern is things getting updated
2044 * while we are still reading) - jhs
2046 spin_lock_bh(&x->lock);
2047 c.data.aevent = p->flags;
2048 c.seq = nlh->nlmsg_seq;
2049 c.portid = nlh->nlmsg_pid;
2051 err = build_aevent(r_skb, x, &c);
2054 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2055 spin_unlock_bh(&x->lock);
2060 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2061 struct nlattr **attrs)
2063 struct net *net = sock_net(skb->sk);
2064 struct xfrm_state *x;
2069 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2070 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2071 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2072 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2073 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2074 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2076 if (!lt && !rp && !re && !et && !rt)
2079 /* pedantic mode - thou shalt sayeth replaceth */
2080 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2083 mark = xfrm_mark_get(attrs, &m);
2085 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2089 if (x->km.state != XFRM_STATE_VALID)
2092 err = xfrm_replay_verify_len(x->replay_esn, re);
2096 spin_lock_bh(&x->lock);
2097 xfrm_update_ae_params(x, attrs, 1);
2098 spin_unlock_bh(&x->lock);
2100 c.event = nlh->nlmsg_type;
2101 c.seq = nlh->nlmsg_seq;
2102 c.portid = nlh->nlmsg_pid;
2103 c.data.aevent = XFRM_AE_CU;
2104 km_state_notify(x, &c);
2111 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2112 struct nlattr **attrs)
2114 struct net *net = sock_net(skb->sk);
2116 u8 type = XFRM_POLICY_TYPE_MAIN;
2119 err = copy_from_user_policy_type(&type, attrs);
2123 err = xfrm_policy_flush(net, type, true);
2125 if (err == -ESRCH) /* empty table */
2131 c.event = nlh->nlmsg_type;
2132 c.seq = nlh->nlmsg_seq;
2133 c.portid = nlh->nlmsg_pid;
2135 km_policy_notify(NULL, 0, &c);
2139 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2140 struct nlattr **attrs)
2142 struct net *net = sock_net(skb->sk);
2143 struct xfrm_policy *xp;
2144 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2145 struct xfrm_userpolicy_info *p = &up->pol;
2146 u8 type = XFRM_POLICY_TYPE_MAIN;
2149 u32 mark = xfrm_mark_get(attrs, &m);
2152 err = copy_from_user_policy_type(&type, attrs);
2156 err = verify_policy_dir(p->dir);
2160 if (attrs[XFRMA_IF_ID])
2161 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2164 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2166 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2167 struct xfrm_sec_ctx *ctx;
2169 err = verify_sec_ctx_len(attrs);
2175 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2177 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2181 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2182 &p->sel, ctx, 0, &err);
2183 security_xfrm_policy_free(ctx);
2188 if (unlikely(xp->walk.dead))
2193 xfrm_policy_delete(xp, p->dir);
2194 xfrm_audit_policy_delete(xp, 1, true);
2196 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2203 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2204 struct nlattr **attrs)
2206 struct net *net = sock_net(skb->sk);
2207 struct xfrm_state *x;
2209 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2210 struct xfrm_usersa_info *p = &ue->state;
2212 u32 mark = xfrm_mark_get(attrs, &m);
2214 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2220 spin_lock_bh(&x->lock);
2222 if (x->km.state != XFRM_STATE_VALID)
2224 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2227 __xfrm_state_delete(x);
2228 xfrm_audit_state_delete(x, 1, true);
2232 spin_unlock_bh(&x->lock);
2237 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2238 struct nlattr **attrs)
2240 struct net *net = sock_net(skb->sk);
2241 struct xfrm_policy *xp;
2242 struct xfrm_user_tmpl *ut;
2244 struct nlattr *rt = attrs[XFRMA_TMPL];
2245 struct xfrm_mark mark;
2247 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2248 struct xfrm_state *x = xfrm_state_alloc(net);
2254 xfrm_mark_get(attrs, &mark);
2256 err = verify_newpolicy_info(&ua->policy);
2261 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2265 memcpy(&x->id, &ua->id, sizeof(ua->id));
2266 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2267 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2268 xp->mark.m = x->mark.m = mark.m;
2269 xp->mark.v = x->mark.v = mark.v;
2271 /* extract the templates and for each call km_key */
2272 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2273 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2274 memcpy(&x->id, &t->id, sizeof(x->id));
2275 x->props.mode = t->mode;
2276 x->props.reqid = t->reqid;
2277 x->props.family = ut->family;
2278 t->aalgos = ua->aalgos;
2279 t->ealgos = ua->ealgos;
2280 t->calgos = ua->calgos;
2281 err = km_query(x, t, xp);
2296 #ifdef CONFIG_XFRM_MIGRATE
2297 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2298 struct xfrm_kmaddress *k,
2299 struct nlattr **attrs, int *num)
2301 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2302 struct xfrm_user_migrate *um;
2306 struct xfrm_user_kmaddress *uk;
2308 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2309 memcpy(&k->local, &uk->local, sizeof(k->local));
2310 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2311 k->family = uk->family;
2312 k->reserved = uk->reserved;
2316 num_migrate = nla_len(rt) / sizeof(*um);
2318 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2321 for (i = 0; i < num_migrate; i++, um++, ma++) {
2322 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2323 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2324 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2325 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2327 ma->proto = um->proto;
2328 ma->mode = um->mode;
2329 ma->reqid = um->reqid;
2331 ma->old_family = um->old_family;
2332 ma->new_family = um->new_family;
2339 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2340 struct nlattr **attrs)
2342 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2343 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2344 struct xfrm_kmaddress km, *kmp;
2348 struct net *net = sock_net(skb->sk);
2349 struct xfrm_encap_tmpl *encap = NULL;
2351 if (attrs[XFRMA_MIGRATE] == NULL)
2354 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2356 err = copy_from_user_policy_type(&type, attrs);
2360 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2367 if (attrs[XFRMA_ENCAP]) {
2368 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2369 sizeof(*encap), GFP_KERNEL);
2374 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2381 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2382 struct nlattr **attrs)
2384 return -ENOPROTOOPT;
2388 #ifdef CONFIG_XFRM_MIGRATE
2389 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2391 struct xfrm_user_migrate um;
2393 memset(&um, 0, sizeof(um));
2394 um.proto = m->proto;
2396 um.reqid = m->reqid;
2397 um.old_family = m->old_family;
2398 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2399 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2400 um.new_family = m->new_family;
2401 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2402 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2404 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2407 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2409 struct xfrm_user_kmaddress uk;
2411 memset(&uk, 0, sizeof(uk));
2412 uk.family = k->family;
2413 uk.reserved = k->reserved;
2414 memcpy(&uk.local, &k->local, sizeof(uk.local));
2415 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2417 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2420 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2423 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2424 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2425 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2426 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2427 + userpolicy_type_attrsize();
2430 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2431 int num_migrate, const struct xfrm_kmaddress *k,
2432 const struct xfrm_selector *sel,
2433 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2435 const struct xfrm_migrate *mp;
2436 struct xfrm_userpolicy_id *pol_id;
2437 struct nlmsghdr *nlh;
2440 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2444 pol_id = nlmsg_data(nlh);
2445 /* copy data from selector, dir, and type to the pol_id */
2446 memset(pol_id, 0, sizeof(*pol_id));
2447 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2451 err = copy_to_user_kmaddress(k, skb);
2456 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2460 err = copy_to_user_policy_type(type, skb);
2463 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2464 err = copy_to_user_migrate(mp, skb);
2469 nlmsg_end(skb, nlh);
2473 nlmsg_cancel(skb, nlh);
2477 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2478 const struct xfrm_migrate *m, int num_migrate,
2479 const struct xfrm_kmaddress *k,
2480 const struct xfrm_encap_tmpl *encap)
2482 struct net *net = &init_net;
2483 struct sk_buff *skb;
2486 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2492 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2495 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2498 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2499 const struct xfrm_migrate *m, int num_migrate,
2500 const struct xfrm_kmaddress *k,
2501 const struct xfrm_encap_tmpl *encap)
2503 return -ENOPROTOOPT;
2507 #define XMSGSIZE(type) sizeof(struct type)
2509 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2510 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2511 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2512 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2513 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2514 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2515 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2516 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2517 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2518 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2519 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2520 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2521 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2522 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2523 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2524 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2525 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2526 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2527 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2528 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2529 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2530 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2535 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2536 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2537 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2538 [XFRMA_LASTUSED] = { .type = NLA_U64},
2539 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2540 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2541 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2542 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2543 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2544 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2545 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2546 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2547 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2548 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2549 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2550 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2551 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2552 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2553 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2554 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2555 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2556 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2557 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2558 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2559 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2560 [XFRMA_PROTO] = { .type = NLA_U8 },
2561 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2562 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2563 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2564 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2565 [XFRMA_IF_ID] = { .type = NLA_U32 },
2568 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2569 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2570 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2573 static const struct xfrm_link {
2574 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2575 int (*start)(struct netlink_callback *);
2576 int (*dump)(struct sk_buff *, struct netlink_callback *);
2577 int (*done)(struct netlink_callback *);
2578 const struct nla_policy *nla_pol;
2580 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2581 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2582 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2583 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2584 .dump = xfrm_dump_sa,
2585 .done = xfrm_dump_sa_done },
2586 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2587 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2588 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2589 .start = xfrm_dump_policy_start,
2590 .dump = xfrm_dump_policy,
2591 .done = xfrm_dump_policy_done },
2592 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2593 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2594 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2595 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2596 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2597 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2598 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2599 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2600 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2601 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2602 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2603 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2604 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2605 .nla_pol = xfrma_spd_policy,
2606 .nla_max = XFRMA_SPD_MAX },
2607 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2610 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2611 struct netlink_ext_ack *extack)
2613 struct net *net = sock_net(skb->sk);
2614 struct nlattr *attrs[XFRMA_MAX+1];
2615 const struct xfrm_link *link;
2618 if (in_compat_syscall())
2621 type = nlh->nlmsg_type;
2622 if (type > XFRM_MSG_MAX)
2625 type -= XFRM_MSG_BASE;
2626 link = &xfrm_dispatch[type];
2628 /* All operations require privileges, even GET */
2629 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2632 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2633 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2634 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2635 if (link->dump == NULL)
2639 struct netlink_dump_control c = {
2640 .start = link->start,
2644 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2648 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2649 link->nla_max ? : XFRMA_MAX,
2650 link->nla_pol ? : xfrma_policy, extack);
2654 if (link->doit == NULL)
2657 return link->doit(skb, nlh, attrs);
2660 static void xfrm_netlink_rcv(struct sk_buff *skb)
2662 struct net *net = sock_net(skb->sk);
2664 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2665 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2666 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2669 static inline unsigned int xfrm_expire_msgsize(void)
2671 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2672 + nla_total_size(sizeof(struct xfrm_mark));
2675 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2677 struct xfrm_user_expire *ue;
2678 struct nlmsghdr *nlh;
2681 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2685 ue = nlmsg_data(nlh);
2686 copy_to_user_state(x, &ue->state);
2687 ue->hard = (c->data.hard != 0) ? 1 : 0;
2688 /* clear the padding bytes */
2689 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
2691 err = xfrm_mark_put(skb, &x->mark);
2695 err = xfrm_if_id_put(skb, x->if_id);
2699 nlmsg_end(skb, nlh);
2703 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2705 struct net *net = xs_net(x);
2706 struct sk_buff *skb;
2708 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2712 if (build_expire(skb, x, c) < 0) {
2717 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2720 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2722 struct net *net = xs_net(x);
2723 struct sk_buff *skb;
2726 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2730 err = build_aevent(skb, x, c);
2733 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2736 static int xfrm_notify_sa_flush(const struct km_event *c)
2738 struct net *net = c->net;
2739 struct xfrm_usersa_flush *p;
2740 struct nlmsghdr *nlh;
2741 struct sk_buff *skb;
2742 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2744 skb = nlmsg_new(len, GFP_ATOMIC);
2748 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2754 p = nlmsg_data(nlh);
2755 p->proto = c->data.proto;
2757 nlmsg_end(skb, nlh);
2759 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2762 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
2766 l += nla_total_size(aead_len(x->aead));
2768 l += nla_total_size(sizeof(struct xfrm_algo) +
2769 (x->aalg->alg_key_len + 7) / 8);
2770 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2773 l += nla_total_size(xfrm_alg_len(x->ealg));
2775 l += nla_total_size(sizeof(*x->calg));
2777 l += nla_total_size(sizeof(*x->encap));
2779 l += nla_total_size(sizeof(x->tfcpad));
2781 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2783 l += nla_total_size(sizeof(struct xfrm_replay_state));
2785 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2786 x->security->ctx_len);
2788 l += nla_total_size(sizeof(*x->coaddr));
2789 if (x->props.extra_flags)
2790 l += nla_total_size(sizeof(x->props.extra_flags));
2792 l += nla_total_size(sizeof(x->xso));
2793 if (x->props.smark.v | x->props.smark.m) {
2794 l += nla_total_size(sizeof(x->props.smark.v));
2795 l += nla_total_size(sizeof(x->props.smark.m));
2798 l += nla_total_size(sizeof(x->if_id));
2800 /* Must count x->lastused as it may become non-zero behind our back. */
2801 l += nla_total_size_64bit(sizeof(u64));
2806 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2808 struct net *net = xs_net(x);
2809 struct xfrm_usersa_info *p;
2810 struct xfrm_usersa_id *id;
2811 struct nlmsghdr *nlh;
2812 struct sk_buff *skb;
2813 unsigned int len = xfrm_sa_len(x);
2814 unsigned int headlen;
2817 headlen = sizeof(*p);
2818 if (c->event == XFRM_MSG_DELSA) {
2819 len += nla_total_size(headlen);
2820 headlen = sizeof(*id);
2821 len += nla_total_size(sizeof(struct xfrm_mark));
2823 len += NLMSG_ALIGN(headlen);
2825 skb = nlmsg_new(len, GFP_ATOMIC);
2829 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2834 p = nlmsg_data(nlh);
2835 if (c->event == XFRM_MSG_DELSA) {
2836 struct nlattr *attr;
2838 id = nlmsg_data(nlh);
2839 memset(id, 0, sizeof(*id));
2840 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2841 id->spi = x->id.spi;
2842 id->family = x->props.family;
2843 id->proto = x->id.proto;
2845 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2852 err = copy_to_user_state_extra(x, p, skb);
2856 nlmsg_end(skb, nlh);
2858 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2865 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2869 case XFRM_MSG_EXPIRE:
2870 return xfrm_exp_state_notify(x, c);
2871 case XFRM_MSG_NEWAE:
2872 return xfrm_aevent_state_notify(x, c);
2873 case XFRM_MSG_DELSA:
2874 case XFRM_MSG_UPDSA:
2875 case XFRM_MSG_NEWSA:
2876 return xfrm_notify_sa(x, c);
2877 case XFRM_MSG_FLUSHSA:
2878 return xfrm_notify_sa_flush(c);
2880 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2889 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2890 struct xfrm_policy *xp)
2892 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2893 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2894 + nla_total_size(sizeof(struct xfrm_mark))
2895 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2896 + userpolicy_type_attrsize();
2899 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2900 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2902 __u32 seq = xfrm_get_acqseq();
2903 struct xfrm_user_acquire *ua;
2904 struct nlmsghdr *nlh;
2907 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2911 ua = nlmsg_data(nlh);
2912 memcpy(&ua->id, &x->id, sizeof(ua->id));
2913 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2914 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2915 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2916 ua->aalgos = xt->aalgos;
2917 ua->ealgos = xt->ealgos;
2918 ua->calgos = xt->calgos;
2919 ua->seq = x->km.seq = seq;
2921 err = copy_to_user_tmpl(xp, skb);
2923 err = copy_to_user_state_sec_ctx(x, skb);
2925 err = copy_to_user_policy_type(xp->type, skb);
2927 err = xfrm_mark_put(skb, &xp->mark);
2929 err = xfrm_if_id_put(skb, xp->if_id);
2931 nlmsg_cancel(skb, nlh);
2935 nlmsg_end(skb, nlh);
2939 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2940 struct xfrm_policy *xp)
2942 struct net *net = xs_net(x);
2943 struct sk_buff *skb;
2946 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2950 err = build_acquire(skb, x, xt, xp);
2953 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2956 /* User gives us xfrm_user_policy_info followed by an array of 0
2957 * or more templates.
2959 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2960 u8 *data, int len, int *dir)
2962 struct net *net = sock_net(sk);
2963 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2964 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2965 struct xfrm_policy *xp;
2968 switch (sk->sk_family) {
2970 if (opt != IP_XFRM_POLICY) {
2975 #if IS_ENABLED(CONFIG_IPV6)
2977 if (opt != IPV6_XFRM_POLICY) {
2990 if (len < sizeof(*p) ||
2991 verify_newpolicy_info(p))
2994 nr = ((len - sizeof(*p)) / sizeof(*ut));
2995 if (validate_tmpl(nr, ut, p->sel.family))
2998 if (p->dir > XFRM_POLICY_OUT)
3001 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3007 copy_from_user_policy(xp, p);
3008 xp->type = XFRM_POLICY_TYPE_MAIN;
3009 copy_templates(xp, ut, nr);
3016 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3018 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3019 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3020 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3021 + nla_total_size(sizeof(struct xfrm_mark))
3022 + userpolicy_type_attrsize();
3025 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3026 int dir, const struct km_event *c)
3028 struct xfrm_user_polexpire *upe;
3029 int hard = c->data.hard;
3030 struct nlmsghdr *nlh;
3033 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3037 upe = nlmsg_data(nlh);
3038 copy_to_user_policy(xp, &upe->pol, dir);
3039 err = copy_to_user_tmpl(xp, skb);
3041 err = copy_to_user_sec_ctx(xp, skb);
3043 err = copy_to_user_policy_type(xp->type, skb);
3045 err = xfrm_mark_put(skb, &xp->mark);
3047 err = xfrm_if_id_put(skb, xp->if_id);
3049 nlmsg_cancel(skb, nlh);
3054 nlmsg_end(skb, nlh);
3058 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3060 struct net *net = xp_net(xp);
3061 struct sk_buff *skb;
3064 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3068 err = build_polexpire(skb, xp, dir, c);
3071 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3074 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3076 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3077 struct net *net = xp_net(xp);
3078 struct xfrm_userpolicy_info *p;
3079 struct xfrm_userpolicy_id *id;
3080 struct nlmsghdr *nlh;
3081 struct sk_buff *skb;
3082 unsigned int headlen;
3085 headlen = sizeof(*p);
3086 if (c->event == XFRM_MSG_DELPOLICY) {
3087 len += nla_total_size(headlen);
3088 headlen = sizeof(*id);
3090 len += userpolicy_type_attrsize();
3091 len += nla_total_size(sizeof(struct xfrm_mark));
3092 len += NLMSG_ALIGN(headlen);
3094 skb = nlmsg_new(len, GFP_ATOMIC);
3098 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3103 p = nlmsg_data(nlh);
3104 if (c->event == XFRM_MSG_DELPOLICY) {
3105 struct nlattr *attr;
3107 id = nlmsg_data(nlh);
3108 memset(id, 0, sizeof(*id));
3111 id->index = xp->index;
3113 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3115 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3123 copy_to_user_policy(xp, p, dir);
3124 err = copy_to_user_tmpl(xp, skb);
3126 err = copy_to_user_policy_type(xp->type, skb);
3128 err = xfrm_mark_put(skb, &xp->mark);
3130 err = xfrm_if_id_put(skb, xp->if_id);
3134 nlmsg_end(skb, nlh);
3136 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3143 static int xfrm_notify_policy_flush(const struct km_event *c)
3145 struct net *net = c->net;
3146 struct nlmsghdr *nlh;
3147 struct sk_buff *skb;
3150 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3154 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3158 err = copy_to_user_policy_type(c->data.type, skb);
3162 nlmsg_end(skb, nlh);
3164 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3171 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3175 case XFRM_MSG_NEWPOLICY:
3176 case XFRM_MSG_UPDPOLICY:
3177 case XFRM_MSG_DELPOLICY:
3178 return xfrm_notify_policy(xp, dir, c);
3179 case XFRM_MSG_FLUSHPOLICY:
3180 return xfrm_notify_policy_flush(c);
3181 case XFRM_MSG_POLEXPIRE:
3182 return xfrm_exp_policy_notify(xp, dir, c);
3184 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3192 static inline unsigned int xfrm_report_msgsize(void)
3194 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3197 static int build_report(struct sk_buff *skb, u8 proto,
3198 struct xfrm_selector *sel, xfrm_address_t *addr)
3200 struct xfrm_user_report *ur;
3201 struct nlmsghdr *nlh;
3203 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3207 ur = nlmsg_data(nlh);
3209 memcpy(&ur->sel, sel, sizeof(ur->sel));
3212 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3214 nlmsg_cancel(skb, nlh);
3218 nlmsg_end(skb, nlh);
3222 static int xfrm_send_report(struct net *net, u8 proto,
3223 struct xfrm_selector *sel, xfrm_address_t *addr)
3225 struct sk_buff *skb;
3228 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3232 err = build_report(skb, proto, sel, addr);
3235 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3238 static inline unsigned int xfrm_mapping_msgsize(void)
3240 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3243 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3244 xfrm_address_t *new_saddr, __be16 new_sport)
3246 struct xfrm_user_mapping *um;
3247 struct nlmsghdr *nlh;
3249 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3253 um = nlmsg_data(nlh);
3255 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3256 um->id.spi = x->id.spi;
3257 um->id.family = x->props.family;
3258 um->id.proto = x->id.proto;
3259 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3260 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3261 um->new_sport = new_sport;
3262 um->old_sport = x->encap->encap_sport;
3263 um->reqid = x->props.reqid;
3265 nlmsg_end(skb, nlh);
3269 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3272 struct net *net = xs_net(x);
3273 struct sk_buff *skb;
3276 if (x->id.proto != IPPROTO_ESP)
3282 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3286 err = build_mapping(skb, x, ipaddr, sport);
3289 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3292 static bool xfrm_is_alive(const struct km_event *c)
3294 return (bool)xfrm_acquire_is_on(c->net);
3297 static struct xfrm_mgr netlink_mgr = {
3298 .notify = xfrm_send_state_notify,
3299 .acquire = xfrm_send_acquire,
3300 .compile_policy = xfrm_compile_policy,
3301 .notify_policy = xfrm_send_policy_notify,
3302 .report = xfrm_send_report,
3303 .migrate = xfrm_send_migrate,
3304 .new_mapping = xfrm_send_mapping,
3305 .is_alive = xfrm_is_alive,
3308 static int __net_init xfrm_user_net_init(struct net *net)
3311 struct netlink_kernel_cfg cfg = {
3312 .groups = XFRMNLGRP_MAX,
3313 .input = xfrm_netlink_rcv,
3316 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3319 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3320 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3324 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3327 list_for_each_entry(net, net_exit_list, exit_list)
3328 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3330 list_for_each_entry(net, net_exit_list, exit_list)
3331 netlink_kernel_release(net->xfrm.nlsk_stash);
3334 static struct pernet_operations xfrm_user_net_ops = {
3335 .init = xfrm_user_net_init,
3336 .exit_batch = xfrm_user_net_exit,
3339 static int __init xfrm_user_init(void)
3343 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3345 rv = register_pernet_subsys(&xfrm_user_net_ops);
3348 rv = xfrm_register_km(&netlink_mgr);
3350 unregister_pernet_subsys(&xfrm_user_net_ops);
3354 static void __exit xfrm_user_exit(void)
3356 xfrm_unregister_km(&netlink_mgr);
3357 unregister_pernet_subsys(&xfrm_user_net_ops);
3360 module_init(xfrm_user_init);
3361 module_exit(xfrm_user_exit);
3362 MODULE_LICENSE("GPL");
3363 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);