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_input(struct sk_buff *skb, int nexthdr, __be32 spi,
211 int encap_type, unsigned short family)
215 sp = skb_sec_path(skb);
216 if (sp && (sp->len || sp->olen) &&
217 !xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family))
220 XFRM_SPI_SKB_CB(skb)->family = family;
221 if (family == AF_INET) {
222 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
223 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
225 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
226 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL;
229 return xfrm_input(skb, nexthdr, spi, encap_type);
235 static int xfrmi4_rcv(struct sk_buff *skb)
237 return xfrmi_input(skb, ip_hdr(skb)->protocol, 0, 0, AF_INET);
240 static int xfrmi6_rcv(struct sk_buff *skb)
242 return xfrmi_input(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
246 static int xfrmi4_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
248 return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET);
251 static int xfrmi6_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
253 return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET6);
256 static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
258 const struct xfrm_mode *inner_mode;
259 struct net_device *dev;
260 struct xfrm_state *x;
264 if (err && !secpath_exists(skb))
267 x = xfrm_input_state(skb);
269 xi = xfrmi_lookup(xs_net(x), x);
277 DEV_STATS_INC(dev, rx_errors);
278 DEV_STATS_INC(dev, rx_dropped);
283 xnet = !net_eq(xi->net, dev_net(skb->dev));
286 inner_mode = &x->inner_mode;
288 if (x->sel.family == AF_UNSPEC) {
289 inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
290 if (inner_mode == NULL) {
291 XFRM_INC_STATS(dev_net(skb->dev),
292 LINUX_MIB_XFRMINSTATEMODEERROR);
297 if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
302 xfrmi_scrub_packet(skb, xnet);
303 dev_sw_netstats_rx_add(dev, skb->len);
309 xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
311 struct xfrm_if *xi = netdev_priv(dev);
312 struct dst_entry *dst = skb_dst(skb);
313 unsigned int length = skb->len;
314 struct net_device *tdev;
315 struct xfrm_state *x;
320 dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
324 goto tx_err_link_failure;
329 goto tx_err_link_failure;
331 if (x->if_id != xi->p.if_id)
332 goto tx_err_link_failure;
337 DEV_STATS_INC(dev, collisions);
338 net_warn_ratelimited("%s: Local routing loop detected!\n",
340 goto tx_err_dst_release;
344 if (skb->len > mtu) {
345 skb_dst_update_pmtu_no_confirm(skb, mtu);
347 if (skb->protocol == htons(ETH_P_IPV6)) {
348 if (mtu < IPV6_MIN_MTU)
352 icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
356 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)))
358 icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
367 xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
368 skb_dst_set(skb, dst);
371 err = dst_output(xi->net, skb->sk, skb);
372 if (net_xmit_eval(err) == 0) {
373 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
375 u64_stats_update_begin(&tstats->syncp);
376 tstats->tx_bytes += length;
377 tstats->tx_packets++;
378 u64_stats_update_end(&tstats->syncp);
380 DEV_STATS_INC(dev, tx_errors);
381 DEV_STATS_INC(dev, tx_aborted_errors);
386 DEV_STATS_INC(dev, tx_carrier_errors);
387 dst_link_failure(skb);
393 static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
395 struct xfrm_if *xi = netdev_priv(dev);
396 struct dst_entry *dst = skb_dst(skb);
400 memset(&fl, 0, sizeof(fl));
402 switch (skb->protocol) {
403 case htons(ETH_P_IPV6):
404 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
405 xfrm_decode_session(skb, &fl, AF_INET6);
407 fl.u.ip6.flowi6_oif = dev->ifindex;
408 fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
409 dst = ip6_route_output(dev_net(dev), NULL, &fl.u.ip6);
412 DEV_STATS_INC(dev, tx_carrier_errors);
415 skb_dst_set(skb, dst);
418 case htons(ETH_P_IP):
419 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
420 xfrm_decode_session(skb, &fl, AF_INET);
424 fl.u.ip4.flowi4_oif = dev->ifindex;
425 fl.u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
426 rt = __ip_route_output_key(dev_net(dev), &fl.u.ip4);
428 DEV_STATS_INC(dev, tx_carrier_errors);
431 skb_dst_set(skb, &rt->dst);
438 fl.flowi_oif = xi->p.link;
440 ret = xfrmi_xmit2(skb, dev, &fl);
447 DEV_STATS_INC(dev, tx_errors);
448 DEV_STATS_INC(dev, tx_dropped);
453 static int xfrmi4_err(struct sk_buff *skb, u32 info)
455 const struct iphdr *iph = (const struct iphdr *)skb->data;
456 struct net *net = dev_net(skb->dev);
457 int protocol = iph->protocol;
458 struct ip_comp_hdr *ipch;
459 struct ip_esp_hdr *esph;
460 struct ip_auth_hdr *ah ;
461 struct xfrm_state *x;
467 esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
471 ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
475 ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
476 spi = htonl(ntohs(ipch->cpi));
482 switch (icmp_hdr(skb)->type) {
483 case ICMP_DEST_UNREACH:
484 if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
492 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
493 spi, protocol, AF_INET);
497 xi = xfrmi_lookup(net, x);
503 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
504 ipv4_update_pmtu(skb, net, info, 0, protocol);
506 ipv4_redirect(skb, net, 0, protocol);
512 static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
513 u8 type, u8 code, int offset, __be32 info)
515 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
516 struct net *net = dev_net(skb->dev);
517 int protocol = iph->nexthdr;
518 struct ip_comp_hdr *ipch;
519 struct ip_esp_hdr *esph;
520 struct ip_auth_hdr *ah;
521 struct xfrm_state *x;
527 esph = (struct ip_esp_hdr *)(skb->data + offset);
531 ah = (struct ip_auth_hdr *)(skb->data + offset);
535 ipch = (struct ip_comp_hdr *)(skb->data + offset);
536 spi = htonl(ntohs(ipch->cpi));
542 if (type != ICMPV6_PKT_TOOBIG &&
543 type != NDISC_REDIRECT)
546 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
547 spi, protocol, AF_INET6);
551 xi = xfrmi_lookup(net, x);
557 if (type == NDISC_REDIRECT)
558 ip6_redirect(skb, net, skb->dev->ifindex, 0,
559 sock_net_uid(net, NULL));
561 ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
567 static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
569 if (xi->p.link != p->link)
572 xi->p.if_id = p->if_id;
577 static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
579 struct net *net = xi->net;
580 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
583 xfrmi_unlink(xfrmn, xi);
585 err = xfrmi_change(xi, p);
586 xfrmi_link(xfrmn, xi);
587 netdev_state_change(xi->dev);
591 static void xfrmi_get_stats64(struct net_device *dev,
592 struct rtnl_link_stats64 *s)
594 dev_fetch_sw_netstats(s, dev->tstats);
596 s->rx_dropped = dev->stats.rx_dropped;
597 s->tx_dropped = dev->stats.tx_dropped;
600 static int xfrmi_get_iflink(const struct net_device *dev)
602 struct xfrm_if *xi = netdev_priv(dev);
608 static const struct net_device_ops xfrmi_netdev_ops = {
609 .ndo_init = xfrmi_dev_init,
610 .ndo_uninit = xfrmi_dev_uninit,
611 .ndo_start_xmit = xfrmi_xmit,
612 .ndo_get_stats64 = xfrmi_get_stats64,
613 .ndo_get_iflink = xfrmi_get_iflink,
616 static void xfrmi_dev_setup(struct net_device *dev)
618 dev->netdev_ops = &xfrmi_netdev_ops;
619 dev->header_ops = &ip_tunnel_header_ops;
620 dev->type = ARPHRD_NONE;
621 dev->mtu = ETH_DATA_LEN;
622 dev->min_mtu = ETH_MIN_MTU;
623 dev->max_mtu = IP_MAX_MTU;
624 dev->flags = IFF_NOARP;
625 dev->needs_free_netdev = true;
626 dev->priv_destructor = xfrmi_dev_free;
629 eth_broadcast_addr(dev->broadcast);
632 static int xfrmi_dev_init(struct net_device *dev)
634 struct xfrm_if *xi = netdev_priv(dev);
635 struct net_device *phydev = __dev_get_by_index(xi->net, xi->p.link);
638 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
642 err = gro_cells_init(&xi->gro_cells, dev);
644 free_percpu(dev->tstats);
648 dev->features |= NETIF_F_LLTX;
651 dev->needed_headroom = phydev->needed_headroom;
652 dev->needed_tailroom = phydev->needed_tailroom;
654 if (is_zero_ether_addr(dev->dev_addr))
655 eth_hw_addr_inherit(dev, phydev);
656 if (is_zero_ether_addr(dev->broadcast))
657 memcpy(dev->broadcast, phydev->broadcast,
660 eth_hw_addr_random(dev);
661 eth_broadcast_addr(dev->broadcast);
667 static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
668 struct netlink_ext_ack *extack)
673 static void xfrmi_netlink_parms(struct nlattr *data[],
674 struct xfrm_if_parms *parms)
676 memset(parms, 0, sizeof(*parms));
681 if (data[IFLA_XFRM_LINK])
682 parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
684 if (data[IFLA_XFRM_IF_ID])
685 parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
688 static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
689 struct nlattr *tb[], struct nlattr *data[],
690 struct netlink_ext_ack *extack)
692 struct net *net = dev_net(dev);
693 struct xfrm_if_parms p = {};
697 xfrmi_netlink_parms(data, &p);
699 NL_SET_ERR_MSG(extack, "if_id must be non zero");
703 xi = xfrmi_locate(net, &p);
707 xi = netdev_priv(dev);
712 err = xfrmi_create(dev);
716 static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
718 unregister_netdevice_queue(dev, head);
721 static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
722 struct nlattr *data[],
723 struct netlink_ext_ack *extack)
725 struct xfrm_if *xi = netdev_priv(dev);
726 struct net *net = xi->net;
727 struct xfrm_if_parms p = {};
729 xfrmi_netlink_parms(data, &p);
731 NL_SET_ERR_MSG(extack, "if_id must be non zero");
735 xi = xfrmi_locate(net, &p);
737 xi = netdev_priv(dev);
743 return xfrmi_update(xi, &p);
746 static size_t xfrmi_get_size(const struct net_device *dev)
751 /* IFLA_XFRM_IF_ID */
756 static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
758 struct xfrm_if *xi = netdev_priv(dev);
759 struct xfrm_if_parms *parm = &xi->p;
761 if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
762 nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
763 goto nla_put_failure;
770 static struct net *xfrmi_get_link_net(const struct net_device *dev)
772 struct xfrm_if *xi = netdev_priv(dev);
777 static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
778 [IFLA_XFRM_LINK] = { .type = NLA_U32 },
779 [IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
782 static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
784 .maxtype = IFLA_XFRM_MAX,
785 .policy = xfrmi_policy,
786 .priv_size = sizeof(struct xfrm_if),
787 .setup = xfrmi_dev_setup,
788 .validate = xfrmi_validate,
789 .newlink = xfrmi_newlink,
790 .dellink = xfrmi_dellink,
791 .changelink = xfrmi_changelink,
792 .get_size = xfrmi_get_size,
793 .fill_info = xfrmi_fill_info,
794 .get_link_net = xfrmi_get_link_net,
797 static void __net_exit xfrmi_exit_batch_net(struct list_head *net_exit_list)
803 list_for_each_entry(net, net_exit_list, exit_list) {
804 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
805 struct xfrm_if __rcu **xip;
809 for (i = 0; i < XFRMI_HASH_SIZE; i++) {
810 for (xip = &xfrmn->xfrmi[i];
811 (xi = rtnl_dereference(*xip)) != NULL;
813 unregister_netdevice_queue(xi->dev, &list);
816 unregister_netdevice_many(&list);
820 static struct pernet_operations xfrmi_net_ops = {
821 .exit_batch = xfrmi_exit_batch_net,
823 .size = sizeof(struct xfrmi_net),
826 static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
827 .handler = xfrmi6_rcv,
828 .input_handler = xfrmi6_input,
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 .input_handler = xfrm_input,
837 .cb_handler = xfrmi_rcv_cb,
838 .err_handler = xfrmi6_err,
842 static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
843 .handler = xfrm6_rcv,
844 .input_handler = xfrm_input,
845 .cb_handler = xfrmi_rcv_cb,
846 .err_handler = xfrmi6_err,
850 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
851 static int xfrmi6_rcv_tunnel(struct sk_buff *skb)
853 const xfrm_address_t *saddr;
856 saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
857 spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
859 return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
862 static struct xfrm6_tunnel xfrmi_ipv6_handler __read_mostly = {
863 .handler = xfrmi6_rcv_tunnel,
864 .cb_handler = xfrmi_rcv_cb,
865 .err_handler = xfrmi6_err,
869 static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = {
870 .handler = xfrmi6_rcv_tunnel,
871 .cb_handler = xfrmi_rcv_cb,
872 .err_handler = xfrmi6_err,
877 static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
878 .handler = xfrmi4_rcv,
879 .input_handler = xfrmi4_input,
880 .cb_handler = xfrmi_rcv_cb,
881 .err_handler = xfrmi4_err,
885 static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
886 .handler = xfrm4_rcv,
887 .input_handler = xfrm_input,
888 .cb_handler = xfrmi_rcv_cb,
889 .err_handler = xfrmi4_err,
893 static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
894 .handler = xfrm4_rcv,
895 .input_handler = xfrm_input,
896 .cb_handler = xfrmi_rcv_cb,
897 .err_handler = xfrmi4_err,
901 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
902 static int xfrmi4_rcv_tunnel(struct sk_buff *skb)
904 return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
907 static struct xfrm_tunnel xfrmi_ipip_handler __read_mostly = {
908 .handler = xfrmi4_rcv_tunnel,
909 .cb_handler = xfrmi_rcv_cb,
910 .err_handler = xfrmi4_err,
914 static struct xfrm_tunnel xfrmi_ipip6_handler __read_mostly = {
915 .handler = xfrmi4_rcv_tunnel,
916 .cb_handler = xfrmi_rcv_cb,
917 .err_handler = xfrmi4_err,
922 static int __init xfrmi4_init(void)
926 err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
928 goto xfrm_proto_esp_failed;
929 err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
931 goto xfrm_proto_ah_failed;
932 err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
934 goto xfrm_proto_comp_failed;
935 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
936 err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET);
938 goto xfrm_tunnel_ipip_failed;
939 err = xfrm4_tunnel_register(&xfrmi_ipip6_handler, AF_INET6);
941 goto xfrm_tunnel_ipip6_failed;
946 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
947 xfrm_tunnel_ipip6_failed:
948 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
949 xfrm_tunnel_ipip_failed:
950 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
952 xfrm_proto_comp_failed:
953 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
954 xfrm_proto_ah_failed:
955 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
956 xfrm_proto_esp_failed:
960 static void xfrmi4_fini(void)
962 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
963 xfrm4_tunnel_deregister(&xfrmi_ipip6_handler, AF_INET6);
964 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
966 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
967 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
968 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
971 static int __init xfrmi6_init(void)
975 err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
977 goto xfrm_proto_esp_failed;
978 err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
980 goto xfrm_proto_ah_failed;
981 err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
983 goto xfrm_proto_comp_failed;
984 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
985 err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET6);
987 goto xfrm_tunnel_ipv6_failed;
988 err = xfrm6_tunnel_register(&xfrmi_ip6ip_handler, AF_INET);
990 goto xfrm_tunnel_ip6ip_failed;
995 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
996 xfrm_tunnel_ip6ip_failed:
997 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
998 xfrm_tunnel_ipv6_failed:
999 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
1001 xfrm_proto_comp_failed:
1002 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
1003 xfrm_proto_ah_failed:
1004 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
1005 xfrm_proto_esp_failed:
1009 static void xfrmi6_fini(void)
1011 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
1012 xfrm6_tunnel_deregister(&xfrmi_ip6ip_handler, AF_INET);
1013 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
1015 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
1016 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
1017 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
1020 static const struct xfrm_if_cb xfrm_if_cb = {
1021 .decode_session = xfrmi_decode_session,
1024 static int __init xfrmi_init(void)
1029 pr_info("IPsec XFRM device driver\n");
1031 msg = "tunnel device";
1032 err = register_pernet_device(&xfrmi_net_ops);
1034 goto pernet_dev_failed;
1036 msg = "xfrm4 protocols";
1037 err = xfrmi4_init();
1041 msg = "xfrm6 protocols";
1042 err = xfrmi6_init();
1047 msg = "netlink interface";
1048 err = rtnl_link_register(&xfrmi_link_ops);
1050 goto rtnl_link_failed;
1052 xfrm_if_register_cb(&xfrm_if_cb);
1061 unregister_pernet_device(&xfrmi_net_ops);
1063 pr_err("xfrmi init: failed to register %s\n", msg);
1067 static void __exit xfrmi_fini(void)
1069 xfrm_if_unregister_cb();
1070 rtnl_link_unregister(&xfrmi_link_ops);
1073 unregister_pernet_device(&xfrmi_net_ops);
1076 module_init(xfrmi_init);
1077 module_exit(xfrmi_fini);
1078 MODULE_LICENSE("GPL");
1079 MODULE_ALIAS_RTNL_LINK("xfrm");
1080 MODULE_ALIAS_NETDEV("xfrm0");
1081 MODULE_AUTHOR("Steffen Klassert");
1082 MODULE_DESCRIPTION("XFRM virtual interface");