1 #include <linux/module.h>
2 #include <linux/errno.h>
3 #include <linux/socket.h>
4 #include <linux/skbuff.h>
7 #include <linux/types.h>
8 #include <linux/kernel.h>
9 #include <net/genetlink.h>
12 #include <net/protocol.h>
14 #include <net/udp_tunnel.h>
16 #include <uapi/linux/fou.h>
17 #include <uapi/linux/genetlink.h>
25 struct udp_offload udp_offloads;
26 struct list_head list;
30 #define FOU_F_REMCSUM_NOPARTIAL BIT(0)
36 struct udp_port_cfg udp_config;
39 static unsigned int fou_net_id;
42 struct list_head fou_list;
43 struct mutex fou_lock;
46 static inline struct fou *fou_from_sock(struct sock *sk)
48 return sk->sk_user_data;
51 static int fou_recv_pull(struct sk_buff *skb, size_t len)
53 struct iphdr *iph = ip_hdr(skb);
55 /* Remove 'len' bytes from the packet (UDP header and
56 * FOU header if present).
58 iph->tot_len = htons(ntohs(iph->tot_len) - len);
60 skb_postpull_rcsum(skb, udp_hdr(skb), len);
61 skb_reset_transport_header(skb);
62 return iptunnel_pull_offloads(skb);
65 static int fou_udp_recv(struct sock *sk, struct sk_buff *skb)
67 struct fou *fou = fou_from_sock(sk);
72 if (fou_recv_pull(skb, sizeof(struct udphdr)))
75 return -fou->protocol;
82 static struct guehdr *gue_remcsum(struct sk_buff *skb, struct guehdr *guehdr,
83 void *data, size_t hdrlen, u8 ipproto,
87 size_t start = ntohs(pd[0]);
88 size_t offset = ntohs(pd[1]);
89 size_t plen = sizeof(struct udphdr) + hdrlen +
90 max_t(size_t, offset + sizeof(u16), start);
92 if (skb->remcsum_offload)
95 if (!pskb_may_pull(skb, plen))
97 guehdr = (struct guehdr *)&udp_hdr(skb)[1];
99 skb_remcsum_process(skb, (void *)guehdr + hdrlen,
100 start, offset, nopartial);
105 static int gue_control_message(struct sk_buff *skb, struct guehdr *guehdr)
112 static int gue_udp_recv(struct sock *sk, struct sk_buff *skb)
114 struct fou *fou = fou_from_sock(sk);
115 size_t len, optlen, hdrlen;
116 struct guehdr *guehdr;
123 len = sizeof(struct udphdr) + sizeof(struct guehdr);
124 if (!pskb_may_pull(skb, len))
127 guehdr = (struct guehdr *)&udp_hdr(skb)[1];
129 optlen = guehdr->hlen << 2;
132 if (!pskb_may_pull(skb, len))
135 /* guehdr may change after pull */
136 guehdr = (struct guehdr *)&udp_hdr(skb)[1];
138 hdrlen = sizeof(struct guehdr) + optlen;
140 if (guehdr->version != 0 || validate_gue_flags(guehdr, optlen))
143 hdrlen = sizeof(struct guehdr) + optlen;
145 ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(skb)->tot_len) - len);
147 /* Pull csum through the guehdr now . This can be used if
148 * there is a remote checksum offload.
150 skb_postpull_rcsum(skb, udp_hdr(skb), len);
154 if (guehdr->flags & GUE_FLAG_PRIV) {
155 __be32 flags = *(__be32 *)(data + doffset);
157 doffset += GUE_LEN_PRIV;
159 if (flags & GUE_PFLAG_REMCSUM) {
160 guehdr = gue_remcsum(skb, guehdr, data + doffset,
161 hdrlen, guehdr->proto_ctype,
163 FOU_F_REMCSUM_NOPARTIAL));
169 doffset += GUE_PLEN_REMCSUM;
173 if (unlikely(guehdr->control))
174 return gue_control_message(skb, guehdr);
176 __skb_pull(skb, sizeof(struct udphdr) + hdrlen);
177 skb_reset_transport_header(skb);
179 if (iptunnel_pull_offloads(skb))
182 return -guehdr->proto_ctype;
189 static struct sk_buff **fou_gro_receive(struct sk_buff **head,
191 struct udp_offload *uoff)
193 const struct net_offload *ops;
194 struct sk_buff **pp = NULL;
195 u8 proto = NAPI_GRO_CB(skb)->proto;
196 const struct net_offload **offloads;
198 /* We can clear the encap_mark for FOU as we are essentially doing
199 * one of two possible things. We are either adding an L4 tunnel
200 * header to the outer L3 tunnel header, or we are are simply
201 * treating the GRE tunnel header as though it is a UDP protocol
202 * specific header such as VXLAN or GENEVE.
204 NAPI_GRO_CB(skb)->encap_mark = 0;
206 /* Flag this frame as already having an outer encap header */
207 NAPI_GRO_CB(skb)->is_fou = 1;
210 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
211 ops = rcu_dereference(offloads[proto]);
212 if (!ops || !ops->callbacks.gro_receive)
215 pp = ops->callbacks.gro_receive(head, skb);
223 static int fou_gro_complete(struct sk_buff *skb, int nhoff,
224 struct udp_offload *uoff)
226 const struct net_offload *ops;
227 u8 proto = NAPI_GRO_CB(skb)->proto;
229 const struct net_offload **offloads;
232 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
233 ops = rcu_dereference(offloads[proto]);
234 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
237 err = ops->callbacks.gro_complete(skb, nhoff);
239 skb_set_inner_mac_header(skb, nhoff);
247 static struct guehdr *gue_gro_remcsum(struct sk_buff *skb, unsigned int off,
248 struct guehdr *guehdr, void *data,
249 size_t hdrlen, struct gro_remcsum *grc,
253 size_t start = ntohs(pd[0]);
254 size_t offset = ntohs(pd[1]);
256 if (skb->remcsum_offload)
259 if (!NAPI_GRO_CB(skb)->csum_valid)
262 guehdr = skb_gro_remcsum_process(skb, (void *)guehdr, off, hdrlen,
263 start, offset, grc, nopartial);
265 skb->remcsum_offload = 1;
270 static struct sk_buff **gue_gro_receive(struct sk_buff **head,
272 struct udp_offload *uoff)
274 const struct net_offload **offloads;
275 const struct net_offload *ops;
276 struct sk_buff **pp = NULL;
278 struct guehdr *guehdr;
279 size_t len, optlen, hdrlen, off;
283 struct fou *fou = container_of(uoff, struct fou, udp_offloads);
284 struct gro_remcsum grc;
286 skb_gro_remcsum_init(&grc);
288 off = skb_gro_offset(skb);
289 len = off + sizeof(*guehdr);
291 guehdr = skb_gro_header_fast(skb, off);
292 if (skb_gro_header_hard(skb, len)) {
293 guehdr = skb_gro_header_slow(skb, len, off);
294 if (unlikely(!guehdr))
298 optlen = guehdr->hlen << 2;
301 if (skb_gro_header_hard(skb, len)) {
302 guehdr = skb_gro_header_slow(skb, len, off);
303 if (unlikely(!guehdr))
307 if (unlikely(guehdr->control) || guehdr->version != 0 ||
308 validate_gue_flags(guehdr, optlen))
311 hdrlen = sizeof(*guehdr) + optlen;
313 /* Adjust NAPI_GRO_CB(skb)->csum to account for guehdr,
314 * this is needed if there is a remote checkcsum offload.
316 skb_gro_postpull_rcsum(skb, guehdr, hdrlen);
320 if (guehdr->flags & GUE_FLAG_PRIV) {
321 __be32 flags = *(__be32 *)(data + doffset);
323 doffset += GUE_LEN_PRIV;
325 if (flags & GUE_PFLAG_REMCSUM) {
326 guehdr = gue_gro_remcsum(skb, off, guehdr,
327 data + doffset, hdrlen, &grc,
329 FOU_F_REMCSUM_NOPARTIAL));
336 doffset += GUE_PLEN_REMCSUM;
340 skb_gro_pull(skb, hdrlen);
342 for (p = *head; p; p = p->next) {
343 const struct guehdr *guehdr2;
345 if (!NAPI_GRO_CB(p)->same_flow)
348 guehdr2 = (struct guehdr *)(p->data + off);
350 /* Compare base GUE header to be equal (covers
351 * hlen, version, proto_ctype, and flags.
353 if (guehdr->word != guehdr2->word) {
354 NAPI_GRO_CB(p)->same_flow = 0;
358 /* Compare optional fields are the same. */
359 if (guehdr->hlen && memcmp(&guehdr[1], &guehdr2[1],
360 guehdr->hlen << 2)) {
361 NAPI_GRO_CB(p)->same_flow = 0;
366 /* We can clear the encap_mark for GUE as we are essentially doing
367 * one of two possible things. We are either adding an L4 tunnel
368 * header to the outer L3 tunnel header, or we are are simply
369 * treating the GRE tunnel header as though it is a UDP protocol
370 * specific header such as VXLAN or GENEVE.
372 NAPI_GRO_CB(skb)->encap_mark = 0;
374 /* Flag this frame as already having an outer encap header */
375 NAPI_GRO_CB(skb)->is_fou = 1;
378 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
379 ops = rcu_dereference(offloads[guehdr->proto_ctype]);
380 if (WARN_ON_ONCE(!ops || !ops->callbacks.gro_receive))
383 pp = ops->callbacks.gro_receive(head, skb);
389 NAPI_GRO_CB(skb)->flush |= flush;
390 skb_gro_remcsum_cleanup(skb, &grc);
395 static int gue_gro_complete(struct sk_buff *skb, int nhoff,
396 struct udp_offload *uoff)
398 const struct net_offload **offloads;
399 struct guehdr *guehdr = (struct guehdr *)(skb->data + nhoff);
400 const struct net_offload *ops;
401 unsigned int guehlen;
405 proto = guehdr->proto_ctype;
407 guehlen = sizeof(*guehdr) + (guehdr->hlen << 2);
410 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
411 ops = rcu_dereference(offloads[proto]);
412 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
415 err = ops->callbacks.gro_complete(skb, nhoff + guehlen);
417 skb_set_inner_mac_header(skb, nhoff + guehlen);
424 static int fou_add_to_port_list(struct net *net, struct fou *fou)
426 struct fou_net *fn = net_generic(net, fou_net_id);
429 mutex_lock(&fn->fou_lock);
430 list_for_each_entry(fout, &fn->fou_list, list) {
431 if (fou->port == fout->port) {
432 mutex_unlock(&fn->fou_lock);
437 list_add(&fou->list, &fn->fou_list);
438 mutex_unlock(&fn->fou_lock);
443 static void fou_release(struct fou *fou)
445 struct socket *sock = fou->sock;
446 struct sock *sk = sock->sk;
448 if (sk->sk_family == AF_INET)
449 udp_del_offload(&fou->udp_offloads);
450 list_del(&fou->list);
451 udp_tunnel_sock_release(sock);
456 static int fou_encap_init(struct sock *sk, struct fou *fou, struct fou_cfg *cfg)
458 udp_sk(sk)->encap_rcv = fou_udp_recv;
459 fou->protocol = cfg->protocol;
460 fou->udp_offloads.callbacks.gro_receive = fou_gro_receive;
461 fou->udp_offloads.callbacks.gro_complete = fou_gro_complete;
462 fou->udp_offloads.port = cfg->udp_config.local_udp_port;
463 fou->udp_offloads.ipproto = cfg->protocol;
468 static int gue_encap_init(struct sock *sk, struct fou *fou, struct fou_cfg *cfg)
470 udp_sk(sk)->encap_rcv = gue_udp_recv;
471 fou->udp_offloads.callbacks.gro_receive = gue_gro_receive;
472 fou->udp_offloads.callbacks.gro_complete = gue_gro_complete;
473 fou->udp_offloads.port = cfg->udp_config.local_udp_port;
478 static int fou_create(struct net *net, struct fou_cfg *cfg,
479 struct socket **sockp)
481 struct socket *sock = NULL;
482 struct fou *fou = NULL;
486 /* Open UDP socket */
487 err = udp_sock_create(net, &cfg->udp_config, &sock);
491 /* Allocate FOU port structure */
492 fou = kzalloc(sizeof(*fou), GFP_KERNEL);
500 fou->flags = cfg->flags;
501 fou->port = cfg->udp_config.local_udp_port;
503 /* Initial for fou type */
505 case FOU_ENCAP_DIRECT:
506 err = fou_encap_init(sk, fou, cfg);
511 err = gue_encap_init(sk, fou, cfg);
520 fou->type = cfg->type;
522 udp_sk(sk)->encap_type = 1;
525 sk->sk_user_data = fou;
528 inet_inc_convert_csum(sk);
530 sk->sk_allocation = GFP_ATOMIC;
532 if (cfg->udp_config.family == AF_INET) {
533 err = udp_add_offload(net, &fou->udp_offloads);
538 err = fou_add_to_port_list(net, fou);
550 udp_tunnel_sock_release(sock);
555 static int fou_destroy(struct net *net, struct fou_cfg *cfg)
557 struct fou_net *fn = net_generic(net, fou_net_id);
558 __be16 port = cfg->udp_config.local_udp_port;
562 mutex_lock(&fn->fou_lock);
563 list_for_each_entry(fou, &fn->fou_list, list) {
564 if (fou->port == port) {
570 mutex_unlock(&fn->fou_lock);
575 static struct genl_family fou_nl_family = {
576 .id = GENL_ID_GENERATE,
578 .name = FOU_GENL_NAME,
579 .version = FOU_GENL_VERSION,
580 .maxattr = FOU_ATTR_MAX,
584 static struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = {
585 [FOU_ATTR_PORT] = { .type = NLA_U16, },
586 [FOU_ATTR_AF] = { .type = NLA_U8, },
587 [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
588 [FOU_ATTR_TYPE] = { .type = NLA_U8, },
589 [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
592 static int parse_nl_config(struct genl_info *info,
595 memset(cfg, 0, sizeof(*cfg));
597 cfg->udp_config.family = AF_INET;
599 if (info->attrs[FOU_ATTR_AF]) {
600 u8 family = nla_get_u8(info->attrs[FOU_ATTR_AF]);
602 if (family != AF_INET)
605 cfg->udp_config.family = family;
608 if (info->attrs[FOU_ATTR_PORT]) {
609 __be16 port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
611 cfg->udp_config.local_udp_port = port;
614 if (info->attrs[FOU_ATTR_IPPROTO])
615 cfg->protocol = nla_get_u8(info->attrs[FOU_ATTR_IPPROTO]);
617 if (info->attrs[FOU_ATTR_TYPE])
618 cfg->type = nla_get_u8(info->attrs[FOU_ATTR_TYPE]);
620 if (info->attrs[FOU_ATTR_REMCSUM_NOPARTIAL])
621 cfg->flags |= FOU_F_REMCSUM_NOPARTIAL;
626 static int fou_nl_cmd_add_port(struct sk_buff *skb, struct genl_info *info)
628 struct net *net = genl_info_net(info);
632 err = parse_nl_config(info, &cfg);
636 return fou_create(net, &cfg, NULL);
639 static int fou_nl_cmd_rm_port(struct sk_buff *skb, struct genl_info *info)
641 struct net *net = genl_info_net(info);
645 err = parse_nl_config(info, &cfg);
649 return fou_destroy(net, &cfg);
652 static int fou_fill_info(struct fou *fou, struct sk_buff *msg)
654 if (nla_put_u8(msg, FOU_ATTR_AF, fou->sock->sk->sk_family) ||
655 nla_put_be16(msg, FOU_ATTR_PORT, fou->port) ||
656 nla_put_u8(msg, FOU_ATTR_IPPROTO, fou->protocol) ||
657 nla_put_u8(msg, FOU_ATTR_TYPE, fou->type))
660 if (fou->flags & FOU_F_REMCSUM_NOPARTIAL)
661 if (nla_put_flag(msg, FOU_ATTR_REMCSUM_NOPARTIAL))
666 static int fou_dump_info(struct fou *fou, u32 portid, u32 seq,
667 u32 flags, struct sk_buff *skb, u8 cmd)
671 hdr = genlmsg_put(skb, portid, seq, &fou_nl_family, flags, cmd);
675 if (fou_fill_info(fou, skb) < 0)
676 goto nla_put_failure;
678 genlmsg_end(skb, hdr);
682 genlmsg_cancel(skb, hdr);
686 static int fou_nl_cmd_get_port(struct sk_buff *skb, struct genl_info *info)
688 struct net *net = genl_info_net(info);
689 struct fou_net *fn = net_generic(net, fou_net_id);
696 ret = parse_nl_config(info, &cfg);
699 port = cfg.udp_config.local_udp_port;
703 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
708 mutex_lock(&fn->fou_lock);
709 list_for_each_entry(fout, &fn->fou_list, list) {
710 if (port == fout->port) {
711 ret = fou_dump_info(fout, info->snd_portid,
712 info->snd_seq, 0, msg,
717 mutex_unlock(&fn->fou_lock);
721 return genlmsg_reply(msg, info);
728 static int fou_nl_dump(struct sk_buff *skb, struct netlink_callback *cb)
730 struct net *net = sock_net(skb->sk);
731 struct fou_net *fn = net_generic(net, fou_net_id);
735 mutex_lock(&fn->fou_lock);
736 list_for_each_entry(fout, &fn->fou_list, list) {
737 if (idx++ < cb->args[0])
739 ret = fou_dump_info(fout, NETLINK_CB(cb->skb).portid,
740 cb->nlh->nlmsg_seq, NLM_F_MULTI,
745 mutex_unlock(&fn->fou_lock);
751 static const struct genl_ops fou_nl_ops[] = {
754 .doit = fou_nl_cmd_add_port,
755 .policy = fou_nl_policy,
756 .flags = GENL_ADMIN_PERM,
760 .doit = fou_nl_cmd_rm_port,
761 .policy = fou_nl_policy,
762 .flags = GENL_ADMIN_PERM,
766 .doit = fou_nl_cmd_get_port,
767 .dumpit = fou_nl_dump,
768 .policy = fou_nl_policy,
772 size_t fou_encap_hlen(struct ip_tunnel_encap *e)
774 return sizeof(struct udphdr);
776 EXPORT_SYMBOL(fou_encap_hlen);
778 size_t gue_encap_hlen(struct ip_tunnel_encap *e)
781 bool need_priv = false;
783 len = sizeof(struct udphdr) + sizeof(struct guehdr);
785 if (e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) {
786 len += GUE_PLEN_REMCSUM;
790 len += need_priv ? GUE_LEN_PRIV : 0;
794 EXPORT_SYMBOL(gue_encap_hlen);
796 static void fou_build_udp(struct sk_buff *skb, struct ip_tunnel_encap *e,
797 struct flowi4 *fl4, u8 *protocol, __be16 sport)
801 skb_push(skb, sizeof(struct udphdr));
802 skb_reset_transport_header(skb);
808 uh->len = htons(skb->len);
809 udp_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM), skb,
810 fl4->saddr, fl4->daddr, skb->len);
812 *protocol = IPPROTO_UDP;
815 int fou_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
816 u8 *protocol, struct flowi4 *fl4)
818 int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM ? SKB_GSO_UDP_TUNNEL_CSUM :
822 skb = iptunnel_handle_offloads(skb, type);
827 sport = e->sport ? : udp_flow_src_port(dev_net(skb->dev),
829 fou_build_udp(skb, e, fl4, protocol, sport);
833 EXPORT_SYMBOL(fou_build_header);
835 int gue_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
836 u8 *protocol, struct flowi4 *fl4)
838 int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM ? SKB_GSO_UDP_TUNNEL_CSUM :
840 struct guehdr *guehdr;
841 size_t hdrlen, optlen = 0;
844 bool need_priv = false;
846 if ((e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) &&
847 skb->ip_summed == CHECKSUM_PARTIAL) {
848 optlen += GUE_PLEN_REMCSUM;
849 type |= SKB_GSO_TUNNEL_REMCSUM;
853 optlen += need_priv ? GUE_LEN_PRIV : 0;
855 skb = iptunnel_handle_offloads(skb, type);
860 /* Get source port (based on flow hash) before skb_push */
861 sport = e->sport ? : udp_flow_src_port(dev_net(skb->dev),
864 hdrlen = sizeof(struct guehdr) + optlen;
866 skb_push(skb, hdrlen);
868 guehdr = (struct guehdr *)skb->data;
872 guehdr->hlen = optlen >> 2;
874 guehdr->proto_ctype = *protocol;
879 __be32 *flags = data;
881 guehdr->flags |= GUE_FLAG_PRIV;
883 data += GUE_LEN_PRIV;
885 if (type & SKB_GSO_TUNNEL_REMCSUM) {
886 u16 csum_start = skb_checksum_start_offset(skb);
889 if (csum_start < hdrlen)
892 csum_start -= hdrlen;
893 pd[0] = htons(csum_start);
894 pd[1] = htons(csum_start + skb->csum_offset);
896 if (!skb_is_gso(skb)) {
897 skb->ip_summed = CHECKSUM_NONE;
898 skb->encapsulation = 0;
901 *flags |= GUE_PFLAG_REMCSUM;
902 data += GUE_PLEN_REMCSUM;
907 fou_build_udp(skb, e, fl4, protocol, sport);
911 EXPORT_SYMBOL(gue_build_header);
913 #ifdef CONFIG_NET_FOU_IP_TUNNELS
915 static const struct ip_tunnel_encap_ops fou_iptun_ops = {
916 .encap_hlen = fou_encap_hlen,
917 .build_header = fou_build_header,
920 static const struct ip_tunnel_encap_ops gue_iptun_ops = {
921 .encap_hlen = gue_encap_hlen,
922 .build_header = gue_build_header,
925 static int ip_tunnel_encap_add_fou_ops(void)
929 ret = ip_tunnel_encap_add_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
931 pr_err("can't add fou ops\n");
935 ret = ip_tunnel_encap_add_ops(&gue_iptun_ops, TUNNEL_ENCAP_GUE);
937 pr_err("can't add gue ops\n");
938 ip_tunnel_encap_del_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
945 static void ip_tunnel_encap_del_fou_ops(void)
947 ip_tunnel_encap_del_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
948 ip_tunnel_encap_del_ops(&gue_iptun_ops, TUNNEL_ENCAP_GUE);
953 static int ip_tunnel_encap_add_fou_ops(void)
958 static void ip_tunnel_encap_del_fou_ops(void)
964 static __net_init int fou_init_net(struct net *net)
966 struct fou_net *fn = net_generic(net, fou_net_id);
968 INIT_LIST_HEAD(&fn->fou_list);
969 mutex_init(&fn->fou_lock);
973 static __net_exit void fou_exit_net(struct net *net)
975 struct fou_net *fn = net_generic(net, fou_net_id);
976 struct fou *fou, *next;
978 /* Close all the FOU sockets */
979 mutex_lock(&fn->fou_lock);
980 list_for_each_entry_safe(fou, next, &fn->fou_list, list)
982 mutex_unlock(&fn->fou_lock);
985 static struct pernet_operations fou_net_ops = {
986 .init = fou_init_net,
987 .exit = fou_exit_net,
989 .size = sizeof(struct fou_net),
992 static int __init fou_init(void)
996 ret = register_pernet_device(&fou_net_ops);
1000 ret = genl_register_family_with_ops(&fou_nl_family,
1005 ret = ip_tunnel_encap_add_fou_ops();
1009 genl_unregister_family(&fou_nl_family);
1011 unregister_pernet_device(&fou_net_ops);
1016 static void __exit fou_fini(void)
1018 ip_tunnel_encap_del_fou_ops();
1019 genl_unregister_family(&fou_nl_family);
1020 unregister_pernet_device(&fou_net_ops);
1023 module_init(fou_init);
1024 module_exit(fou_fini);
1025 MODULE_AUTHOR("Tom Herbert <therbert@google.com>");
1026 MODULE_LICENSE("GPL");