1 // SPDX-License-Identifier: GPL-2.0
3 * XFRM virtual interface
5 * Copyright (C) 2018 secunet Security Networks AG
8 * Steffen Klassert <steffen.klassert@secunet.com>
11 #include <linux/module.h>
12 #include <linux/capability.h>
13 #include <linux/errno.h>
14 #include <linux/types.h>
15 #include <linux/sockios.h>
16 #include <linux/icmp.h>
20 #include <linux/net.h>
21 #include <linux/in6.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_link.h>
24 #include <linux/if_arp.h>
25 #include <linux/icmpv6.h>
26 #include <linux/init.h>
27 #include <linux/route.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/netfilter_ipv6.h>
30 #include <linux/slab.h>
31 #include <linux/hash.h>
33 #include <linux/uaccess.h>
34 #include <linux/atomic.h>
39 #include <net/ip6_route.h>
40 #include <net/addrconf.h>
42 #include <net/net_namespace.h>
43 #include <net/netns/generic.h>
44 #include <linux/etherdevice.h>
46 static int xfrmi_dev_init(struct net_device *dev);
47 static void xfrmi_dev_setup(struct net_device *dev);
48 static struct rtnl_link_ops xfrmi_link_ops __read_mostly;
49 static unsigned int xfrmi_net_id __read_mostly;
52 /* lists for storing interfaces in use */
53 struct xfrm_if __rcu *xfrmi[1];
56 #define for_each_xfrmi_rcu(start, xi) \
57 for (xi = rcu_dereference(start); xi; xi = rcu_dereference(xi->next))
59 static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x)
61 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
64 for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) {
65 if (x->if_id == xi->p.if_id &&
66 (xi->dev->flags & IFF_UP))
73 static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb,
74 unsigned short family)
76 struct xfrmi_net *xfrmn;
80 if (!secpath_exists(skb) || !skb->dev)
85 ifindex = inet6_sdif(skb);
88 ifindex = inet_sdif(skb);
92 ifindex = skb->dev->ifindex;
94 xfrmn = net_generic(xs_net(xfrm_input_state(skb)), xfrmi_net_id);
96 for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) {
97 if (ifindex == xi->dev->ifindex &&
98 (xi->dev->flags & IFF_UP))
105 static void xfrmi_link(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
107 struct xfrm_if __rcu **xip = &xfrmn->xfrmi[0];
109 rcu_assign_pointer(xi->next , rtnl_dereference(*xip));
110 rcu_assign_pointer(*xip, xi);
113 static void xfrmi_unlink(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
115 struct xfrm_if __rcu **xip;
116 struct xfrm_if *iter;
118 for (xip = &xfrmn->xfrmi[0];
119 (iter = rtnl_dereference(*xip)) != NULL;
122 rcu_assign_pointer(*xip, xi->next);
128 static void xfrmi_dev_free(struct net_device *dev)
130 struct xfrm_if *xi = netdev_priv(dev);
132 gro_cells_destroy(&xi->gro_cells);
133 free_percpu(dev->tstats);
136 static int xfrmi_create(struct net_device *dev)
138 struct xfrm_if *xi = netdev_priv(dev);
139 struct net *net = dev_net(dev);
140 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
143 dev->rtnl_link_ops = &xfrmi_link_ops;
144 err = register_netdevice(dev);
149 xfrmi_link(xfrmn, xi);
157 static struct xfrm_if *xfrmi_locate(struct net *net, struct xfrm_if_parms *p)
159 struct xfrm_if __rcu **xip;
161 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
163 for (xip = &xfrmn->xfrmi[0];
164 (xi = rtnl_dereference(*xip)) != NULL;
166 if (xi->p.if_id == p->if_id)
172 static void xfrmi_dev_uninit(struct net_device *dev)
174 struct xfrm_if *xi = netdev_priv(dev);
175 struct xfrmi_net *xfrmn = net_generic(xi->net, xfrmi_net_id);
177 xfrmi_unlink(xfrmn, xi);
181 static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
184 skb->pkt_type = PACKET_HOST;
200 static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
202 struct pcpu_sw_netstats *tstats;
203 struct xfrm_mode *inner_mode;
204 struct net_device *dev;
205 struct xfrm_state *x;
212 x = xfrm_input_state(skb);
214 xi = xfrmi_lookup(xs_net(x), x);
222 dev->stats.rx_errors++;
223 dev->stats.rx_dropped++;
228 xnet = !net_eq(xi->net, dev_net(skb->dev));
231 inner_mode = x->inner_mode;
233 if (x->sel.family == AF_UNSPEC) {
234 inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
235 if (inner_mode == NULL) {
236 XFRM_INC_STATS(dev_net(skb->dev),
237 LINUX_MIB_XFRMINSTATEMODEERROR);
242 if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
243 inner_mode->afinfo->family))
247 xfrmi_scrub_packet(skb, xnet);
249 tstats = this_cpu_ptr(dev->tstats);
251 u64_stats_update_begin(&tstats->syncp);
252 tstats->rx_packets++;
253 tstats->rx_bytes += skb->len;
254 u64_stats_update_end(&tstats->syncp);
260 xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
262 struct xfrm_if *xi = netdev_priv(dev);
263 struct net_device_stats *stats = &xi->dev->stats;
264 struct dst_entry *dst = skb_dst(skb);
265 unsigned int length = skb->len;
266 struct net_device *tdev;
267 struct xfrm_state *x;
272 dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
276 goto tx_err_link_failure;
281 goto tx_err_link_failure;
283 if (x->if_id != xi->p.if_id)
284 goto tx_err_link_failure;
290 net_warn_ratelimited("%s: Local routing loop detected!\n",
292 goto tx_err_dst_release;
296 if (skb->len > mtu) {
297 skb_dst_update_pmtu_no_confirm(skb, mtu);
299 if (skb->protocol == htons(ETH_P_IPV6)) {
300 if (mtu < IPV6_MIN_MTU)
304 icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
308 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)))
310 icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
319 xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
320 skb_dst_set(skb, dst);
323 err = dst_output(xi->net, skb->sk, skb);
324 if (net_xmit_eval(err) == 0) {
325 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
327 u64_stats_update_begin(&tstats->syncp);
328 tstats->tx_bytes += length;
329 tstats->tx_packets++;
330 u64_stats_update_end(&tstats->syncp);
333 stats->tx_aborted_errors++;
338 stats->tx_carrier_errors++;
339 dst_link_failure(skb);
345 static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
347 struct xfrm_if *xi = netdev_priv(dev);
348 struct net_device_stats *stats = &xi->dev->stats;
349 struct dst_entry *dst = skb_dst(skb);
353 memset(&fl, 0, sizeof(fl));
355 switch (skb->protocol) {
356 case htons(ETH_P_IPV6):
357 xfrm_decode_session(skb, &fl, AF_INET6);
358 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
360 fl.u.ip6.flowi6_oif = dev->ifindex;
361 fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
362 dst = ip6_route_output(dev_net(dev), NULL, &fl.u.ip6);
365 stats->tx_carrier_errors++;
368 skb_dst_set(skb, dst);
371 case htons(ETH_P_IP):
372 xfrm_decode_session(skb, &fl, AF_INET);
373 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
377 fl.u.ip4.flowi4_oif = dev->ifindex;
378 fl.u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
379 rt = __ip_route_output_key(dev_net(dev), &fl.u.ip4);
381 stats->tx_carrier_errors++;
384 skb_dst_set(skb, &rt->dst);
391 fl.flowi_oif = xi->p.link;
393 ret = xfrmi_xmit2(skb, dev, &fl);
406 static int xfrmi4_err(struct sk_buff *skb, u32 info)
408 const struct iphdr *iph = (const struct iphdr *)skb->data;
409 struct net *net = dev_net(skb->dev);
410 int protocol = iph->protocol;
411 struct ip_comp_hdr *ipch;
412 struct ip_esp_hdr *esph;
413 struct ip_auth_hdr *ah ;
414 struct xfrm_state *x;
420 esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
424 ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
428 ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
429 spi = htonl(ntohs(ipch->cpi));
435 switch (icmp_hdr(skb)->type) {
436 case ICMP_DEST_UNREACH:
437 if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
445 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
446 spi, protocol, AF_INET);
450 xi = xfrmi_lookup(net, x);
456 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
457 ipv4_update_pmtu(skb, net, info, 0, 0, protocol, 0);
459 ipv4_redirect(skb, net, 0, 0, protocol, 0);
465 static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
466 u8 type, u8 code, int offset, __be32 info)
468 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
469 struct net *net = dev_net(skb->dev);
470 int protocol = iph->nexthdr;
471 struct ip_comp_hdr *ipch;
472 struct ip_esp_hdr *esph;
473 struct ip_auth_hdr *ah;
474 struct xfrm_state *x;
480 esph = (struct ip_esp_hdr *)(skb->data + offset);
484 ah = (struct ip_auth_hdr *)(skb->data + offset);
488 ipch = (struct ip_comp_hdr *)(skb->data + offset);
489 spi = htonl(ntohs(ipch->cpi));
495 if (type != ICMPV6_PKT_TOOBIG &&
496 type != NDISC_REDIRECT)
499 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
500 spi, protocol, AF_INET6);
504 xi = xfrmi_lookup(net, x);
510 if (type == NDISC_REDIRECT)
511 ip6_redirect(skb, net, skb->dev->ifindex, 0,
512 sock_net_uid(net, NULL));
514 ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
520 static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
522 if (xi->p.link != p->link)
525 xi->p.if_id = p->if_id;
530 static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
532 struct net *net = xi->net;
533 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
536 xfrmi_unlink(xfrmn, xi);
538 err = xfrmi_change(xi, p);
539 xfrmi_link(xfrmn, xi);
540 netdev_state_change(xi->dev);
544 static void xfrmi_get_stats64(struct net_device *dev,
545 struct rtnl_link_stats64 *s)
552 for_each_possible_cpu(cpu) {
553 struct pcpu_sw_netstats *stats;
554 struct pcpu_sw_netstats tmp;
557 stats = per_cpu_ptr(dev->tstats, cpu);
559 start = u64_stats_fetch_begin_irq(&stats->syncp);
560 tmp.rx_packets = stats->rx_packets;
561 tmp.rx_bytes = stats->rx_bytes;
562 tmp.tx_packets = stats->tx_packets;
563 tmp.tx_bytes = stats->tx_bytes;
564 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
566 s->rx_packets += tmp.rx_packets;
567 s->rx_bytes += tmp.rx_bytes;
568 s->tx_packets += tmp.tx_packets;
569 s->tx_bytes += tmp.tx_bytes;
572 s->rx_dropped = dev->stats.rx_dropped;
573 s->tx_dropped = dev->stats.tx_dropped;
576 static int xfrmi_get_iflink(const struct net_device *dev)
578 struct xfrm_if *xi = netdev_priv(dev);
584 static const struct net_device_ops xfrmi_netdev_ops = {
585 .ndo_init = xfrmi_dev_init,
586 .ndo_uninit = xfrmi_dev_uninit,
587 .ndo_start_xmit = xfrmi_xmit,
588 .ndo_get_stats64 = xfrmi_get_stats64,
589 .ndo_get_iflink = xfrmi_get_iflink,
592 static void xfrmi_dev_setup(struct net_device *dev)
594 dev->netdev_ops = &xfrmi_netdev_ops;
595 dev->type = ARPHRD_NONE;
596 dev->mtu = ETH_DATA_LEN;
597 dev->min_mtu = ETH_MIN_MTU;
598 dev->max_mtu = IP_MAX_MTU;
599 dev->flags = IFF_NOARP;
600 dev->needs_free_netdev = true;
601 dev->priv_destructor = xfrmi_dev_free;
604 eth_broadcast_addr(dev->broadcast);
607 static int xfrmi_dev_init(struct net_device *dev)
609 struct xfrm_if *xi = netdev_priv(dev);
610 struct net_device *phydev = __dev_get_by_index(xi->net, xi->p.link);
613 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
617 err = gro_cells_init(&xi->gro_cells, dev);
619 free_percpu(dev->tstats);
623 dev->features |= NETIF_F_LLTX;
626 dev->needed_headroom = phydev->needed_headroom;
627 dev->needed_tailroom = phydev->needed_tailroom;
629 if (is_zero_ether_addr(dev->dev_addr))
630 eth_hw_addr_inherit(dev, phydev);
631 if (is_zero_ether_addr(dev->broadcast))
632 memcpy(dev->broadcast, phydev->broadcast,
635 eth_hw_addr_random(dev);
636 eth_broadcast_addr(dev->broadcast);
642 static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
643 struct netlink_ext_ack *extack)
648 static void xfrmi_netlink_parms(struct nlattr *data[],
649 struct xfrm_if_parms *parms)
651 memset(parms, 0, sizeof(*parms));
656 if (data[IFLA_XFRM_LINK])
657 parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
659 if (data[IFLA_XFRM_IF_ID])
660 parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
663 static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
664 struct nlattr *tb[], struct nlattr *data[],
665 struct netlink_ext_ack *extack)
667 struct net *net = dev_net(dev);
668 struct xfrm_if_parms p = {};
672 xfrmi_netlink_parms(data, &p);
674 NL_SET_ERR_MSG(extack, "if_id must be non zero");
678 xi = xfrmi_locate(net, &p);
682 xi = netdev_priv(dev);
687 err = xfrmi_create(dev);
691 static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
693 unregister_netdevice_queue(dev, head);
696 static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
697 struct nlattr *data[],
698 struct netlink_ext_ack *extack)
700 struct xfrm_if *xi = netdev_priv(dev);
701 struct net *net = xi->net;
702 struct xfrm_if_parms p = {};
704 xfrmi_netlink_parms(data, &p);
706 NL_SET_ERR_MSG(extack, "if_id must be non zero");
710 xi = xfrmi_locate(net, &p);
712 xi = netdev_priv(dev);
718 return xfrmi_update(xi, &p);
721 static size_t xfrmi_get_size(const struct net_device *dev)
726 /* IFLA_XFRM_IF_ID */
731 static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
733 struct xfrm_if *xi = netdev_priv(dev);
734 struct xfrm_if_parms *parm = &xi->p;
736 if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
737 nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
738 goto nla_put_failure;
745 struct net *xfrmi_get_link_net(const struct net_device *dev)
747 struct xfrm_if *xi = netdev_priv(dev);
752 static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
753 [IFLA_XFRM_LINK] = { .type = NLA_U32 },
754 [IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
757 static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
759 .maxtype = IFLA_XFRM_MAX,
760 .policy = xfrmi_policy,
761 .priv_size = sizeof(struct xfrm_if),
762 .setup = xfrmi_dev_setup,
763 .validate = xfrmi_validate,
764 .newlink = xfrmi_newlink,
765 .dellink = xfrmi_dellink,
766 .changelink = xfrmi_changelink,
767 .get_size = xfrmi_get_size,
768 .fill_info = xfrmi_fill_info,
769 .get_link_net = xfrmi_get_link_net,
772 static void __net_exit xfrmi_destroy_interfaces(struct xfrmi_net *xfrmn)
777 xi = rtnl_dereference(xfrmn->xfrmi[0]);
781 unregister_netdevice_queue(xi->dev, &list);
782 unregister_netdevice_many(&list);
785 static int __net_init xfrmi_init_net(struct net *net)
790 static void __net_exit xfrmi_exit_net(struct net *net)
792 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
795 xfrmi_destroy_interfaces(xfrmn);
799 static void __net_exit xfrmi_exit_batch_net(struct list_head *net_exit_list)
805 list_for_each_entry(net, net_exit_list, exit_list) {
806 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
807 struct xfrm_if __rcu **xip;
810 for (xip = &xfrmn->xfrmi[0];
811 (xi = rtnl_dereference(*xip)) != NULL;
813 unregister_netdevice_queue(xi->dev, &list);
815 unregister_netdevice_many(&list);
819 static struct pernet_operations xfrmi_net_ops = {
820 .exit_batch = xfrmi_exit_batch_net,
821 .init = xfrmi_init_net,
822 .exit = xfrmi_exit_net,
824 .size = sizeof(struct xfrmi_net),
827 static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
828 .handler = xfrm6_rcv,
829 .cb_handler = xfrmi_rcv_cb,
830 .err_handler = xfrmi6_err,
834 static struct xfrm6_protocol xfrmi_ah6_protocol __read_mostly = {
835 .handler = xfrm6_rcv,
836 .cb_handler = xfrmi_rcv_cb,
837 .err_handler = xfrmi6_err,
841 static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
842 .handler = xfrm6_rcv,
843 .cb_handler = xfrmi_rcv_cb,
844 .err_handler = xfrmi6_err,
848 static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
849 .handler = xfrm4_rcv,
850 .input_handler = xfrm_input,
851 .cb_handler = xfrmi_rcv_cb,
852 .err_handler = xfrmi4_err,
856 static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
857 .handler = xfrm4_rcv,
858 .input_handler = xfrm_input,
859 .cb_handler = xfrmi_rcv_cb,
860 .err_handler = xfrmi4_err,
864 static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
865 .handler = xfrm4_rcv,
866 .input_handler = xfrm_input,
867 .cb_handler = xfrmi_rcv_cb,
868 .err_handler = xfrmi4_err,
872 static int __init xfrmi4_init(void)
876 err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
878 goto xfrm_proto_esp_failed;
879 err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
881 goto xfrm_proto_ah_failed;
882 err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
884 goto xfrm_proto_comp_failed;
888 xfrm_proto_comp_failed:
889 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
890 xfrm_proto_ah_failed:
891 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
892 xfrm_proto_esp_failed:
896 static void xfrmi4_fini(void)
898 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
899 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
900 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
903 static int __init xfrmi6_init(void)
907 err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
909 goto xfrm_proto_esp_failed;
910 err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
912 goto xfrm_proto_ah_failed;
913 err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
915 goto xfrm_proto_comp_failed;
919 xfrm_proto_comp_failed:
920 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
921 xfrm_proto_ah_failed:
922 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
923 xfrm_proto_esp_failed:
927 static void xfrmi6_fini(void)
929 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
930 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
931 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
934 static const struct xfrm_if_cb xfrm_if_cb = {
935 .decode_session = xfrmi_decode_session,
938 static int __init xfrmi_init(void)
943 pr_info("IPsec XFRM device driver\n");
945 msg = "tunnel device";
946 err = register_pernet_device(&xfrmi_net_ops);
948 goto pernet_dev_failed;
950 msg = "xfrm4 protocols";
955 msg = "xfrm6 protocols";
961 msg = "netlink interface";
962 err = rtnl_link_register(&xfrmi_link_ops);
964 goto rtnl_link_failed;
966 xfrm_if_register_cb(&xfrm_if_cb);
975 unregister_pernet_device(&xfrmi_net_ops);
977 pr_err("xfrmi init: failed to register %s\n", msg);
981 static void __exit xfrmi_fini(void)
983 xfrm_if_unregister_cb();
984 rtnl_link_unregister(&xfrmi_link_ops);
987 unregister_pernet_device(&xfrmi_net_ops);
990 module_init(xfrmi_init);
991 module_exit(xfrmi_fini);
992 MODULE_LICENSE("GPL");
993 MODULE_ALIAS_RTNL_LINK("xfrm");
994 MODULE_ALIAS_NETDEV("xfrm0");
995 MODULE_AUTHOR("Steffen Klassert");
996 MODULE_DESCRIPTION("XFRM virtual interface");