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 pcpu_sw_netstats *tstats;
214 struct net_device *dev;
215 struct xfrm_state *x;
219 if (err && !secpath_exists(skb))
222 x = xfrm_input_state(skb);
224 xi = xfrmi_lookup(xs_net(x), x);
232 dev->stats.rx_errors++;
233 dev->stats.rx_dropped++;
238 xnet = !net_eq(xi->net, dev_net(skb->dev));
241 inner_mode = &x->inner_mode;
243 if (x->sel.family == AF_UNSPEC) {
244 inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
245 if (inner_mode == NULL) {
246 XFRM_INC_STATS(dev_net(skb->dev),
247 LINUX_MIB_XFRMINSTATEMODEERROR);
252 if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
257 xfrmi_scrub_packet(skb, xnet);
259 tstats = this_cpu_ptr(dev->tstats);
261 u64_stats_update_begin(&tstats->syncp);
262 tstats->rx_packets++;
263 tstats->rx_bytes += skb->len;
264 u64_stats_update_end(&tstats->syncp);
270 xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
272 struct xfrm_if *xi = netdev_priv(dev);
273 struct net_device_stats *stats = &xi->dev->stats;
274 struct dst_entry *dst = skb_dst(skb);
275 unsigned int length = skb->len;
276 struct net_device *tdev;
277 struct xfrm_state *x;
282 dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
286 goto tx_err_link_failure;
291 goto tx_err_link_failure;
293 if (x->if_id != xi->p.if_id)
294 goto tx_err_link_failure;
300 net_warn_ratelimited("%s: Local routing loop detected!\n",
302 goto tx_err_dst_release;
306 if (!skb->ignore_df && skb->len > mtu) {
307 skb_dst_update_pmtu_no_confirm(skb, mtu);
309 if (skb->protocol == htons(ETH_P_IPV6)) {
310 if (mtu < IPV6_MIN_MTU)
313 icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
315 icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
323 xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
324 skb_dst_set(skb, dst);
327 err = dst_output(xi->net, skb->sk, skb);
328 if (net_xmit_eval(err) == 0) {
329 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
331 u64_stats_update_begin(&tstats->syncp);
332 tstats->tx_bytes += length;
333 tstats->tx_packets++;
334 u64_stats_update_end(&tstats->syncp);
337 stats->tx_aborted_errors++;
342 stats->tx_carrier_errors++;
343 dst_link_failure(skb);
349 static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
351 struct xfrm_if *xi = netdev_priv(dev);
352 struct net_device_stats *stats = &xi->dev->stats;
353 struct dst_entry *dst = skb_dst(skb);
357 memset(&fl, 0, sizeof(fl));
359 switch (skb->protocol) {
360 case htons(ETH_P_IPV6):
361 xfrm_decode_session(skb, &fl, AF_INET6);
362 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
364 fl.u.ip6.flowi6_oif = dev->ifindex;
365 fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
366 dst = ip6_route_output(dev_net(dev), NULL, &fl.u.ip6);
369 stats->tx_carrier_errors++;
372 skb_dst_set(skb, dst);
375 case htons(ETH_P_IP):
376 xfrm_decode_session(skb, &fl, AF_INET);
377 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
381 fl.u.ip4.flowi4_oif = dev->ifindex;
382 fl.u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
383 rt = __ip_route_output_key(dev_net(dev), &fl.u.ip4);
385 stats->tx_carrier_errors++;
388 skb_dst_set(skb, &rt->dst);
395 fl.flowi_oif = xi->p.link;
397 ret = xfrmi_xmit2(skb, dev, &fl);
410 static int xfrmi4_err(struct sk_buff *skb, u32 info)
412 const struct iphdr *iph = (const struct iphdr *)skb->data;
413 struct net *net = dev_net(skb->dev);
414 int protocol = iph->protocol;
415 struct ip_comp_hdr *ipch;
416 struct ip_esp_hdr *esph;
417 struct ip_auth_hdr *ah ;
418 struct xfrm_state *x;
424 esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
428 ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
432 ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
433 spi = htonl(ntohs(ipch->cpi));
439 switch (icmp_hdr(skb)->type) {
440 case ICMP_DEST_UNREACH:
441 if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
449 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
450 spi, protocol, AF_INET);
454 xi = xfrmi_lookup(net, x);
460 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
461 ipv4_update_pmtu(skb, net, info, 0, protocol);
463 ipv4_redirect(skb, net, 0, protocol);
469 static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
470 u8 type, u8 code, int offset, __be32 info)
472 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
473 struct net *net = dev_net(skb->dev);
474 int protocol = iph->nexthdr;
475 struct ip_comp_hdr *ipch;
476 struct ip_esp_hdr *esph;
477 struct ip_auth_hdr *ah;
478 struct xfrm_state *x;
484 esph = (struct ip_esp_hdr *)(skb->data + offset);
488 ah = (struct ip_auth_hdr *)(skb->data + offset);
492 ipch = (struct ip_comp_hdr *)(skb->data + offset);
493 spi = htonl(ntohs(ipch->cpi));
499 if (type != ICMPV6_PKT_TOOBIG &&
500 type != NDISC_REDIRECT)
503 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
504 spi, protocol, AF_INET6);
508 xi = xfrmi_lookup(net, x);
514 if (type == NDISC_REDIRECT)
515 ip6_redirect(skb, net, skb->dev->ifindex, 0,
516 sock_net_uid(net, NULL));
518 ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
524 static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
526 if (xi->p.link != p->link)
529 xi->p.if_id = p->if_id;
534 static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
536 struct net *net = xi->net;
537 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
540 xfrmi_unlink(xfrmn, xi);
542 err = xfrmi_change(xi, p);
543 xfrmi_link(xfrmn, xi);
544 netdev_state_change(xi->dev);
548 static void xfrmi_get_stats64(struct net_device *dev,
549 struct rtnl_link_stats64 *s)
553 for_each_possible_cpu(cpu) {
554 struct pcpu_sw_netstats *stats;
555 struct pcpu_sw_netstats tmp;
558 stats = per_cpu_ptr(dev->tstats, cpu);
560 start = u64_stats_fetch_begin_irq(&stats->syncp);
561 tmp.rx_packets = stats->rx_packets;
562 tmp.rx_bytes = stats->rx_bytes;
563 tmp.tx_packets = stats->tx_packets;
564 tmp.tx_bytes = stats->tx_bytes;
565 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
567 s->rx_packets += tmp.rx_packets;
568 s->rx_bytes += tmp.rx_bytes;
569 s->tx_packets += tmp.tx_packets;
570 s->tx_bytes += tmp.tx_bytes;
573 s->rx_dropped = dev->stats.rx_dropped;
574 s->tx_dropped = dev->stats.tx_dropped;
577 static int xfrmi_get_iflink(const struct net_device *dev)
579 struct xfrm_if *xi = netdev_priv(dev);
585 static const struct net_device_ops xfrmi_netdev_ops = {
586 .ndo_init = xfrmi_dev_init,
587 .ndo_uninit = xfrmi_dev_uninit,
588 .ndo_start_xmit = xfrmi_xmit,
589 .ndo_get_stats64 = xfrmi_get_stats64,
590 .ndo_get_iflink = xfrmi_get_iflink,
593 static void xfrmi_dev_setup(struct net_device *dev)
595 dev->netdev_ops = &xfrmi_netdev_ops;
596 dev->header_ops = &ip_tunnel_header_ops;
597 dev->type = ARPHRD_NONE;
598 dev->mtu = ETH_DATA_LEN;
599 dev->min_mtu = ETH_MIN_MTU;
600 dev->max_mtu = IP_MAX_MTU;
601 dev->flags = IFF_NOARP;
602 dev->needs_free_netdev = true;
603 dev->priv_destructor = xfrmi_dev_free;
606 eth_broadcast_addr(dev->broadcast);
609 static int xfrmi_dev_init(struct net_device *dev)
611 struct xfrm_if *xi = netdev_priv(dev);
612 struct net_device *phydev = __dev_get_by_index(xi->net, xi->p.link);
615 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
619 err = gro_cells_init(&xi->gro_cells, dev);
621 free_percpu(dev->tstats);
625 dev->features |= NETIF_F_LLTX;
628 dev->needed_headroom = phydev->needed_headroom;
629 dev->needed_tailroom = phydev->needed_tailroom;
631 if (is_zero_ether_addr(dev->dev_addr))
632 eth_hw_addr_inherit(dev, phydev);
633 if (is_zero_ether_addr(dev->broadcast))
634 memcpy(dev->broadcast, phydev->broadcast,
637 eth_hw_addr_random(dev);
638 eth_broadcast_addr(dev->broadcast);
644 static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
645 struct netlink_ext_ack *extack)
650 static void xfrmi_netlink_parms(struct nlattr *data[],
651 struct xfrm_if_parms *parms)
653 memset(parms, 0, sizeof(*parms));
658 if (data[IFLA_XFRM_LINK])
659 parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
661 if (data[IFLA_XFRM_IF_ID])
662 parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
665 static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
666 struct nlattr *tb[], struct nlattr *data[],
667 struct netlink_ext_ack *extack)
669 struct net *net = dev_net(dev);
670 struct xfrm_if_parms p;
674 xfrmi_netlink_parms(data, &p);
675 xi = xfrmi_locate(net, &p);
679 xi = netdev_priv(dev);
684 err = xfrmi_create(dev);
688 static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
690 unregister_netdevice_queue(dev, head);
693 static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
694 struct nlattr *data[],
695 struct netlink_ext_ack *extack)
697 struct xfrm_if *xi = netdev_priv(dev);
698 struct net *net = xi->net;
699 struct xfrm_if_parms p;
701 xfrmi_netlink_parms(data, &p);
702 xi = xfrmi_locate(net, &p);
704 xi = netdev_priv(dev);
710 return xfrmi_update(xi, &p);
713 static size_t xfrmi_get_size(const struct net_device *dev)
718 /* IFLA_XFRM_IF_ID */
723 static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
725 struct xfrm_if *xi = netdev_priv(dev);
726 struct xfrm_if_parms *parm = &xi->p;
728 if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
729 nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
730 goto nla_put_failure;
737 static struct net *xfrmi_get_link_net(const struct net_device *dev)
739 struct xfrm_if *xi = netdev_priv(dev);
744 static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
745 [IFLA_XFRM_LINK] = { .type = NLA_U32 },
746 [IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
749 static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
751 .maxtype = IFLA_XFRM_MAX,
752 .policy = xfrmi_policy,
753 .priv_size = sizeof(struct xfrm_if),
754 .setup = xfrmi_dev_setup,
755 .validate = xfrmi_validate,
756 .newlink = xfrmi_newlink,
757 .dellink = xfrmi_dellink,
758 .changelink = xfrmi_changelink,
759 .get_size = xfrmi_get_size,
760 .fill_info = xfrmi_fill_info,
761 .get_link_net = xfrmi_get_link_net,
764 static void __net_exit xfrmi_exit_batch_net(struct list_head *net_exit_list)
770 list_for_each_entry(net, net_exit_list, exit_list) {
771 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
772 struct xfrm_if __rcu **xip;
776 for (i = 0; i < XFRMI_HASH_SIZE; i++) {
777 for (xip = &xfrmn->xfrmi[i];
778 (xi = rtnl_dereference(*xip)) != NULL;
780 unregister_netdevice_queue(xi->dev, &list);
783 unregister_netdevice_many(&list);
787 static struct pernet_operations xfrmi_net_ops = {
788 .exit_batch = xfrmi_exit_batch_net,
790 .size = sizeof(struct xfrmi_net),
793 static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
794 .handler = xfrm6_rcv,
795 .input_handler = xfrm_input,
796 .cb_handler = xfrmi_rcv_cb,
797 .err_handler = xfrmi6_err,
801 static struct xfrm6_protocol xfrmi_ah6_protocol __read_mostly = {
802 .handler = xfrm6_rcv,
803 .input_handler = xfrm_input,
804 .cb_handler = xfrmi_rcv_cb,
805 .err_handler = xfrmi6_err,
809 static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
810 .handler = xfrm6_rcv,
811 .input_handler = xfrm_input,
812 .cb_handler = xfrmi_rcv_cb,
813 .err_handler = xfrmi6_err,
817 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
818 static int xfrmi6_rcv_tunnel(struct sk_buff *skb)
820 const xfrm_address_t *saddr;
823 saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
824 spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
826 return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
829 static struct xfrm6_tunnel xfrmi_ipv6_handler __read_mostly = {
830 .handler = xfrmi6_rcv_tunnel,
831 .cb_handler = xfrmi_rcv_cb,
832 .err_handler = xfrmi6_err,
836 static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = {
837 .handler = xfrmi6_rcv_tunnel,
838 .cb_handler = xfrmi_rcv_cb,
839 .err_handler = xfrmi6_err,
844 static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
845 .handler = xfrm4_rcv,
846 .input_handler = xfrm_input,
847 .cb_handler = xfrmi_rcv_cb,
848 .err_handler = xfrmi4_err,
852 static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
853 .handler = xfrm4_rcv,
854 .input_handler = xfrm_input,
855 .cb_handler = xfrmi_rcv_cb,
856 .err_handler = xfrmi4_err,
860 static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
861 .handler = xfrm4_rcv,
862 .input_handler = xfrm_input,
863 .cb_handler = xfrmi_rcv_cb,
864 .err_handler = xfrmi4_err,
868 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
869 static int xfrmi4_rcv_tunnel(struct sk_buff *skb)
871 return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
874 static struct xfrm_tunnel xfrmi_ipip_handler __read_mostly = {
875 .handler = xfrmi4_rcv_tunnel,
876 .cb_handler = xfrmi_rcv_cb,
877 .err_handler = xfrmi4_err,
881 static struct xfrm_tunnel xfrmi_ipip6_handler __read_mostly = {
882 .handler = xfrmi4_rcv_tunnel,
883 .cb_handler = xfrmi_rcv_cb,
884 .err_handler = xfrmi4_err,
889 static int __init xfrmi4_init(void)
893 err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
895 goto xfrm_proto_esp_failed;
896 err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
898 goto xfrm_proto_ah_failed;
899 err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
901 goto xfrm_proto_comp_failed;
902 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
903 err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET);
905 goto xfrm_tunnel_ipip_failed;
906 err = xfrm4_tunnel_register(&xfrmi_ipip6_handler, AF_INET6);
908 goto xfrm_tunnel_ipip6_failed;
913 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
914 xfrm_tunnel_ipip6_failed:
915 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
916 xfrm_tunnel_ipip_failed:
917 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
919 xfrm_proto_comp_failed:
920 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
921 xfrm_proto_ah_failed:
922 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
923 xfrm_proto_esp_failed:
927 static void xfrmi4_fini(void)
929 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
930 xfrm4_tunnel_deregister(&xfrmi_ipip6_handler, AF_INET6);
931 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
933 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
934 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
935 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
938 static int __init xfrmi6_init(void)
942 err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
944 goto xfrm_proto_esp_failed;
945 err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
947 goto xfrm_proto_ah_failed;
948 err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
950 goto xfrm_proto_comp_failed;
951 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
952 err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET6);
954 goto xfrm_tunnel_ipv6_failed;
955 err = xfrm6_tunnel_register(&xfrmi_ip6ip_handler, AF_INET);
957 goto xfrm_tunnel_ip6ip_failed;
962 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
963 xfrm_tunnel_ip6ip_failed:
964 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
965 xfrm_tunnel_ipv6_failed:
966 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
968 xfrm_proto_comp_failed:
969 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
970 xfrm_proto_ah_failed:
971 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
972 xfrm_proto_esp_failed:
976 static void xfrmi6_fini(void)
978 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
979 xfrm6_tunnel_deregister(&xfrmi_ip6ip_handler, AF_INET);
980 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
982 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
983 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
984 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
987 static const struct xfrm_if_cb xfrm_if_cb = {
988 .decode_session = xfrmi_decode_session,
991 static int __init xfrmi_init(void)
996 pr_info("IPsec XFRM device driver\n");
998 msg = "tunnel device";
999 err = register_pernet_device(&xfrmi_net_ops);
1001 goto pernet_dev_failed;
1003 msg = "xfrm4 protocols";
1004 err = xfrmi4_init();
1008 msg = "xfrm6 protocols";
1009 err = xfrmi6_init();
1014 msg = "netlink interface";
1015 err = rtnl_link_register(&xfrmi_link_ops);
1017 goto rtnl_link_failed;
1019 xfrm_if_register_cb(&xfrm_if_cb);
1028 unregister_pernet_device(&xfrmi_net_ops);
1030 pr_err("xfrmi init: failed to register %s\n", msg);
1034 static void __exit xfrmi_fini(void)
1036 xfrm_if_unregister_cb();
1037 rtnl_link_unregister(&xfrmi_link_ops);
1040 unregister_pernet_device(&xfrmi_net_ops);
1043 module_init(xfrmi_init);
1044 module_exit(xfrmi_fini);
1045 MODULE_LICENSE("GPL");
1046 MODULE_ALIAS_RTNL_LINK("xfrm");
1047 MODULE_ALIAS_NETDEV("xfrm0");
1048 MODULE_AUTHOR("Steffen Klassert");
1049 MODULE_DESCRIPTION("XFRM virtual interface");