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/ip_tunnels.h>
41 #include <net/addrconf.h>
43 #include <net/net_namespace.h>
44 #include <net/netns/generic.h>
45 #include <linux/etherdevice.h>
47 static int xfrmi_dev_init(struct net_device *dev);
48 static void xfrmi_dev_setup(struct net_device *dev);
49 static struct rtnl_link_ops xfrmi_link_ops __read_mostly;
50 static unsigned int xfrmi_net_id __read_mostly;
51 static const struct net_device_ops xfrmi_netdev_ops;
53 #define XFRMI_HASH_BITS 8
54 #define XFRMI_HASH_SIZE BIT(XFRMI_HASH_BITS)
57 /* lists for storing interfaces in use */
58 struct xfrm_if __rcu *xfrmi[XFRMI_HASH_SIZE];
61 #define for_each_xfrmi_rcu(start, xi) \
62 for (xi = rcu_dereference(start); xi; xi = rcu_dereference(xi->next))
64 static u32 xfrmi_hash(u32 if_id)
66 return hash_32(if_id, XFRMI_HASH_BITS);
69 static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x)
71 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
74 for_each_xfrmi_rcu(xfrmn->xfrmi[xfrmi_hash(x->if_id)], xi) {
75 if (x->if_id == xi->p.if_id &&
76 (xi->dev->flags & IFF_UP))
83 static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb,
84 unsigned short family)
86 struct net_device *dev;
89 if (!secpath_exists(skb) || !skb->dev)
94 ifindex = inet6_sdif(skb);
97 ifindex = inet_sdif(skb);
102 struct net *net = xs_net(xfrm_input_state(skb));
104 dev = dev_get_by_index_rcu(net, ifindex);
109 if (!dev || !(dev->flags & IFF_UP))
111 if (dev->netdev_ops != &xfrmi_netdev_ops)
114 return netdev_priv(dev);
117 static void xfrmi_link(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
119 struct xfrm_if __rcu **xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
121 rcu_assign_pointer(xi->next , rtnl_dereference(*xip));
122 rcu_assign_pointer(*xip, xi);
125 static void xfrmi_unlink(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
127 struct xfrm_if __rcu **xip;
128 struct xfrm_if *iter;
130 for (xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
131 (iter = rtnl_dereference(*xip)) != NULL;
134 rcu_assign_pointer(*xip, xi->next);
140 static void xfrmi_dev_free(struct net_device *dev)
142 struct xfrm_if *xi = netdev_priv(dev);
144 gro_cells_destroy(&xi->gro_cells);
145 free_percpu(dev->tstats);
148 static int xfrmi_create(struct net_device *dev)
150 struct xfrm_if *xi = netdev_priv(dev);
151 struct net *net = dev_net(dev);
152 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
155 dev->rtnl_link_ops = &xfrmi_link_ops;
156 err = register_netdevice(dev);
160 xfrmi_link(xfrmn, xi);
168 static struct xfrm_if *xfrmi_locate(struct net *net, struct xfrm_if_parms *p)
170 struct xfrm_if __rcu **xip;
172 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
174 for (xip = &xfrmn->xfrmi[xfrmi_hash(p->if_id)];
175 (xi = rtnl_dereference(*xip)) != NULL;
177 if (xi->p.if_id == p->if_id)
183 static void xfrmi_dev_uninit(struct net_device *dev)
185 struct xfrm_if *xi = netdev_priv(dev);
186 struct xfrmi_net *xfrmn = net_generic(xi->net, xfrmi_net_id);
188 xfrmi_unlink(xfrmn, xi);
191 static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
194 skb->pkt_type = PACKET_HOST;
210 static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
212 const struct xfrm_mode *inner_mode;
213 struct net_device *dev;
214 struct xfrm_state *x;
218 if (err && !secpath_exists(skb))
221 x = xfrm_input_state(skb);
223 xi = xfrmi_lookup(xs_net(x), x);
231 dev->stats.rx_errors++;
232 dev->stats.rx_dropped++;
237 xnet = !net_eq(xi->net, dev_net(skb->dev));
240 inner_mode = &x->inner_mode;
242 if (x->sel.family == AF_UNSPEC) {
243 inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
244 if (inner_mode == NULL) {
245 XFRM_INC_STATS(dev_net(skb->dev),
246 LINUX_MIB_XFRMINSTATEMODEERROR);
251 if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
256 xfrmi_scrub_packet(skb, xnet);
257 dev_sw_netstats_rx_add(dev, skb->len);
263 xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
265 struct xfrm_if *xi = netdev_priv(dev);
266 struct net_device_stats *stats = &xi->dev->stats;
267 struct dst_entry *dst = skb_dst(skb);
268 unsigned int length = skb->len;
269 struct net_device *tdev;
270 struct xfrm_state *x;
275 dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
279 goto tx_err_link_failure;
284 goto tx_err_link_failure;
286 if (x->if_id != xi->p.if_id)
287 goto tx_err_link_failure;
293 net_warn_ratelimited("%s: Local routing loop detected!\n",
295 goto tx_err_dst_release;
299 if (skb->len > mtu) {
300 skb_dst_update_pmtu_no_confirm(skb, mtu);
302 if (skb->protocol == htons(ETH_P_IPV6)) {
303 if (mtu < IPV6_MIN_MTU)
306 icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
308 icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
316 xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
317 skb_dst_set(skb, dst);
320 err = dst_output(xi->net, skb->sk, skb);
321 if (net_xmit_eval(err) == 0) {
322 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
324 u64_stats_update_begin(&tstats->syncp);
325 tstats->tx_bytes += length;
326 tstats->tx_packets++;
327 u64_stats_update_end(&tstats->syncp);
330 stats->tx_aborted_errors++;
335 stats->tx_carrier_errors++;
336 dst_link_failure(skb);
342 static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
344 struct xfrm_if *xi = netdev_priv(dev);
345 struct net_device_stats *stats = &xi->dev->stats;
346 struct dst_entry *dst = skb_dst(skb);
350 memset(&fl, 0, sizeof(fl));
352 switch (skb->protocol) {
353 case htons(ETH_P_IPV6):
354 xfrm_decode_session(skb, &fl, AF_INET6);
355 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
357 fl.u.ip6.flowi6_oif = dev->ifindex;
358 fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
359 dst = ip6_route_output(dev_net(dev), NULL, &fl.u.ip6);
362 stats->tx_carrier_errors++;
365 skb_dst_set(skb, dst);
368 case htons(ETH_P_IP):
369 xfrm_decode_session(skb, &fl, AF_INET);
370 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
374 fl.u.ip4.flowi4_oif = dev->ifindex;
375 fl.u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
376 rt = __ip_route_output_key(dev_net(dev), &fl.u.ip4);
378 stats->tx_carrier_errors++;
381 skb_dst_set(skb, &rt->dst);
388 fl.flowi_oif = xi->p.link;
390 ret = xfrmi_xmit2(skb, dev, &fl);
403 static int xfrmi4_err(struct sk_buff *skb, u32 info)
405 const struct iphdr *iph = (const struct iphdr *)skb->data;
406 struct net *net = dev_net(skb->dev);
407 int protocol = iph->protocol;
408 struct ip_comp_hdr *ipch;
409 struct ip_esp_hdr *esph;
410 struct ip_auth_hdr *ah ;
411 struct xfrm_state *x;
417 esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
421 ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
425 ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
426 spi = htonl(ntohs(ipch->cpi));
432 switch (icmp_hdr(skb)->type) {
433 case ICMP_DEST_UNREACH:
434 if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
442 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
443 spi, protocol, AF_INET);
447 xi = xfrmi_lookup(net, x);
453 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
454 ipv4_update_pmtu(skb, net, info, 0, protocol);
456 ipv4_redirect(skb, net, 0, protocol);
462 static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
463 u8 type, u8 code, int offset, __be32 info)
465 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
466 struct net *net = dev_net(skb->dev);
467 int protocol = iph->nexthdr;
468 struct ip_comp_hdr *ipch;
469 struct ip_esp_hdr *esph;
470 struct ip_auth_hdr *ah;
471 struct xfrm_state *x;
477 esph = (struct ip_esp_hdr *)(skb->data + offset);
481 ah = (struct ip_auth_hdr *)(skb->data + offset);
485 ipch = (struct ip_comp_hdr *)(skb->data + offset);
486 spi = htonl(ntohs(ipch->cpi));
492 if (type != ICMPV6_PKT_TOOBIG &&
493 type != NDISC_REDIRECT)
496 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
497 spi, protocol, AF_INET6);
501 xi = xfrmi_lookup(net, x);
507 if (type == NDISC_REDIRECT)
508 ip6_redirect(skb, net, skb->dev->ifindex, 0,
509 sock_net_uid(net, NULL));
511 ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
517 static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
519 if (xi->p.link != p->link)
522 xi->p.if_id = p->if_id;
527 static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
529 struct net *net = xi->net;
530 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
533 xfrmi_unlink(xfrmn, xi);
535 err = xfrmi_change(xi, p);
536 xfrmi_link(xfrmn, xi);
537 netdev_state_change(xi->dev);
541 static void xfrmi_get_stats64(struct net_device *dev,
542 struct rtnl_link_stats64 *s)
544 dev_fetch_sw_netstats(s, dev->tstats);
546 s->rx_dropped = dev->stats.rx_dropped;
547 s->tx_dropped = dev->stats.tx_dropped;
550 static int xfrmi_get_iflink(const struct net_device *dev)
552 struct xfrm_if *xi = netdev_priv(dev);
558 static const struct net_device_ops xfrmi_netdev_ops = {
559 .ndo_init = xfrmi_dev_init,
560 .ndo_uninit = xfrmi_dev_uninit,
561 .ndo_start_xmit = xfrmi_xmit,
562 .ndo_get_stats64 = xfrmi_get_stats64,
563 .ndo_get_iflink = xfrmi_get_iflink,
566 static void xfrmi_dev_setup(struct net_device *dev)
568 dev->netdev_ops = &xfrmi_netdev_ops;
569 dev->header_ops = &ip_tunnel_header_ops;
570 dev->type = ARPHRD_NONE;
571 dev->mtu = ETH_DATA_LEN;
572 dev->min_mtu = ETH_MIN_MTU;
573 dev->max_mtu = IP_MAX_MTU;
574 dev->flags = IFF_NOARP;
575 dev->needs_free_netdev = true;
576 dev->priv_destructor = xfrmi_dev_free;
579 eth_broadcast_addr(dev->broadcast);
582 static int xfrmi_dev_init(struct net_device *dev)
584 struct xfrm_if *xi = netdev_priv(dev);
585 struct net_device *phydev = __dev_get_by_index(xi->net, xi->p.link);
588 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
592 err = gro_cells_init(&xi->gro_cells, dev);
594 free_percpu(dev->tstats);
598 dev->features |= NETIF_F_LLTX;
601 dev->needed_headroom = phydev->needed_headroom;
602 dev->needed_tailroom = phydev->needed_tailroom;
604 if (is_zero_ether_addr(dev->dev_addr))
605 eth_hw_addr_inherit(dev, phydev);
606 if (is_zero_ether_addr(dev->broadcast))
607 memcpy(dev->broadcast, phydev->broadcast,
610 eth_hw_addr_random(dev);
611 eth_broadcast_addr(dev->broadcast);
617 static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
618 struct netlink_ext_ack *extack)
623 static void xfrmi_netlink_parms(struct nlattr *data[],
624 struct xfrm_if_parms *parms)
626 memset(parms, 0, sizeof(*parms));
631 if (data[IFLA_XFRM_LINK])
632 parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
634 if (data[IFLA_XFRM_IF_ID])
635 parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
638 static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
639 struct nlattr *tb[], struct nlattr *data[],
640 struct netlink_ext_ack *extack)
642 struct net *net = dev_net(dev);
643 struct xfrm_if_parms p;
647 xfrmi_netlink_parms(data, &p);
648 xi = xfrmi_locate(net, &p);
652 xi = netdev_priv(dev);
657 err = xfrmi_create(dev);
661 static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
663 unregister_netdevice_queue(dev, head);
666 static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
667 struct nlattr *data[],
668 struct netlink_ext_ack *extack)
670 struct xfrm_if *xi = netdev_priv(dev);
671 struct net *net = xi->net;
672 struct xfrm_if_parms p;
674 xfrmi_netlink_parms(data, &p);
675 xi = xfrmi_locate(net, &p);
677 xi = netdev_priv(dev);
683 return xfrmi_update(xi, &p);
686 static size_t xfrmi_get_size(const struct net_device *dev)
691 /* IFLA_XFRM_IF_ID */
696 static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
698 struct xfrm_if *xi = netdev_priv(dev);
699 struct xfrm_if_parms *parm = &xi->p;
701 if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
702 nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
703 goto nla_put_failure;
710 static struct net *xfrmi_get_link_net(const struct net_device *dev)
712 struct xfrm_if *xi = netdev_priv(dev);
717 static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
718 [IFLA_XFRM_LINK] = { .type = NLA_U32 },
719 [IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
722 static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
724 .maxtype = IFLA_XFRM_MAX,
725 .policy = xfrmi_policy,
726 .priv_size = sizeof(struct xfrm_if),
727 .setup = xfrmi_dev_setup,
728 .validate = xfrmi_validate,
729 .newlink = xfrmi_newlink,
730 .dellink = xfrmi_dellink,
731 .changelink = xfrmi_changelink,
732 .get_size = xfrmi_get_size,
733 .fill_info = xfrmi_fill_info,
734 .get_link_net = xfrmi_get_link_net,
737 static void __net_exit xfrmi_exit_batch_net(struct list_head *net_exit_list)
743 list_for_each_entry(net, net_exit_list, exit_list) {
744 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
745 struct xfrm_if __rcu **xip;
749 for (i = 0; i < XFRMI_HASH_SIZE; i++) {
750 for (xip = &xfrmn->xfrmi[i];
751 (xi = rtnl_dereference(*xip)) != NULL;
753 unregister_netdevice_queue(xi->dev, &list);
756 unregister_netdevice_many(&list);
760 static struct pernet_operations xfrmi_net_ops = {
761 .exit_batch = xfrmi_exit_batch_net,
763 .size = sizeof(struct xfrmi_net),
766 static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
767 .handler = xfrm6_rcv,
768 .input_handler = xfrm_input,
769 .cb_handler = xfrmi_rcv_cb,
770 .err_handler = xfrmi6_err,
774 static struct xfrm6_protocol xfrmi_ah6_protocol __read_mostly = {
775 .handler = xfrm6_rcv,
776 .input_handler = xfrm_input,
777 .cb_handler = xfrmi_rcv_cb,
778 .err_handler = xfrmi6_err,
782 static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
783 .handler = xfrm6_rcv,
784 .input_handler = xfrm_input,
785 .cb_handler = xfrmi_rcv_cb,
786 .err_handler = xfrmi6_err,
790 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
791 static int xfrmi6_rcv_tunnel(struct sk_buff *skb)
793 const xfrm_address_t *saddr;
796 saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
797 spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
799 return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
802 static struct xfrm6_tunnel xfrmi_ipv6_handler __read_mostly = {
803 .handler = xfrmi6_rcv_tunnel,
804 .cb_handler = xfrmi_rcv_cb,
805 .err_handler = xfrmi6_err,
809 static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = {
810 .handler = xfrmi6_rcv_tunnel,
811 .cb_handler = xfrmi_rcv_cb,
812 .err_handler = xfrmi6_err,
817 static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
818 .handler = xfrm4_rcv,
819 .input_handler = xfrm_input,
820 .cb_handler = xfrmi_rcv_cb,
821 .err_handler = xfrmi4_err,
825 static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
826 .handler = xfrm4_rcv,
827 .input_handler = xfrm_input,
828 .cb_handler = xfrmi_rcv_cb,
829 .err_handler = xfrmi4_err,
833 static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
834 .handler = xfrm4_rcv,
835 .input_handler = xfrm_input,
836 .cb_handler = xfrmi_rcv_cb,
837 .err_handler = xfrmi4_err,
841 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
842 static int xfrmi4_rcv_tunnel(struct sk_buff *skb)
844 return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
847 static struct xfrm_tunnel xfrmi_ipip_handler __read_mostly = {
848 .handler = xfrmi4_rcv_tunnel,
849 .cb_handler = xfrmi_rcv_cb,
850 .err_handler = xfrmi4_err,
854 static struct xfrm_tunnel xfrmi_ipip6_handler __read_mostly = {
855 .handler = xfrmi4_rcv_tunnel,
856 .cb_handler = xfrmi_rcv_cb,
857 .err_handler = xfrmi4_err,
862 static int __init xfrmi4_init(void)
866 err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
868 goto xfrm_proto_esp_failed;
869 err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
871 goto xfrm_proto_ah_failed;
872 err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
874 goto xfrm_proto_comp_failed;
875 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
876 err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET);
878 goto xfrm_tunnel_ipip_failed;
879 err = xfrm4_tunnel_register(&xfrmi_ipip6_handler, AF_INET6);
881 goto xfrm_tunnel_ipip6_failed;
886 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
887 xfrm_tunnel_ipip6_failed:
888 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
889 xfrm_tunnel_ipip_failed:
890 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
892 xfrm_proto_comp_failed:
893 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
894 xfrm_proto_ah_failed:
895 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
896 xfrm_proto_esp_failed:
900 static void xfrmi4_fini(void)
902 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
903 xfrm4_tunnel_deregister(&xfrmi_ipip6_handler, AF_INET6);
904 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
906 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
907 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
908 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
911 static int __init xfrmi6_init(void)
915 err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
917 goto xfrm_proto_esp_failed;
918 err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
920 goto xfrm_proto_ah_failed;
921 err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
923 goto xfrm_proto_comp_failed;
924 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
925 err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET6);
927 goto xfrm_tunnel_ipv6_failed;
928 err = xfrm6_tunnel_register(&xfrmi_ip6ip_handler, AF_INET);
930 goto xfrm_tunnel_ip6ip_failed;
935 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
936 xfrm_tunnel_ip6ip_failed:
937 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
938 xfrm_tunnel_ipv6_failed:
939 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
941 xfrm_proto_comp_failed:
942 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
943 xfrm_proto_ah_failed:
944 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
945 xfrm_proto_esp_failed:
949 static void xfrmi6_fini(void)
951 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
952 xfrm6_tunnel_deregister(&xfrmi_ip6ip_handler, AF_INET);
953 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
955 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
956 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
957 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
960 static const struct xfrm_if_cb xfrm_if_cb = {
961 .decode_session = xfrmi_decode_session,
964 static int __init xfrmi_init(void)
969 pr_info("IPsec XFRM device driver\n");
971 msg = "tunnel device";
972 err = register_pernet_device(&xfrmi_net_ops);
974 goto pernet_dev_failed;
976 msg = "xfrm4 protocols";
981 msg = "xfrm6 protocols";
987 msg = "netlink interface";
988 err = rtnl_link_register(&xfrmi_link_ops);
990 goto rtnl_link_failed;
992 xfrm_if_register_cb(&xfrm_if_cb);
1001 unregister_pernet_device(&xfrmi_net_ops);
1003 pr_err("xfrmi init: failed to register %s\n", msg);
1007 static void __exit xfrmi_fini(void)
1009 xfrm_if_unregister_cb();
1010 rtnl_link_unregister(&xfrmi_link_ops);
1013 unregister_pernet_device(&xfrmi_net_ops);
1016 module_init(xfrmi_init);
1017 module_exit(xfrmi_fini);
1018 MODULE_LICENSE("GPL");
1019 MODULE_ALIAS_RTNL_LINK("xfrm");
1020 MODULE_ALIAS_NETDEV("xfrm0");
1021 MODULE_AUTHOR("Steffen Klassert");
1022 MODULE_DESCRIPTION("XFRM virtual interface");