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;
124 len = sizeof(struct udphdr) + sizeof(struct guehdr);
125 if (!pskb_may_pull(skb, len))
128 guehdr = (struct guehdr *)&udp_hdr(skb)[1];
130 optlen = guehdr->hlen << 2;
133 if (!pskb_may_pull(skb, len))
136 /* guehdr may change after pull */
137 guehdr = (struct guehdr *)&udp_hdr(skb)[1];
139 hdrlen = sizeof(struct guehdr) + optlen;
141 if (guehdr->version != 0 || validate_gue_flags(guehdr, optlen))
144 hdrlen = sizeof(struct guehdr) + optlen;
146 ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(skb)->tot_len) - len);
148 /* Pull csum through the guehdr now . This can be used if
149 * there is a remote checksum offload.
151 skb_postpull_rcsum(skb, udp_hdr(skb), len);
155 if (guehdr->flags & GUE_FLAG_PRIV) {
156 __be32 flags = *(__be32 *)(data + doffset);
158 doffset += GUE_LEN_PRIV;
160 if (flags & GUE_PFLAG_REMCSUM) {
161 guehdr = gue_remcsum(skb, guehdr, data + doffset,
162 hdrlen, guehdr->proto_ctype,
164 FOU_F_REMCSUM_NOPARTIAL));
170 doffset += GUE_PLEN_REMCSUM;
174 if (unlikely(guehdr->control))
175 return gue_control_message(skb, guehdr);
177 proto_ctype = guehdr->proto_ctype;
178 __skb_pull(skb, sizeof(struct udphdr) + hdrlen);
179 skb_reset_transport_header(skb);
181 if (iptunnel_pull_offloads(skb))
191 static struct sk_buff **fou_gro_receive(struct sk_buff **head,
193 struct udp_offload *uoff)
195 const struct net_offload *ops;
196 struct sk_buff **pp = NULL;
197 u8 proto = NAPI_GRO_CB(skb)->proto;
198 const struct net_offload **offloads;
200 /* We can clear the encap_mark for FOU as we are essentially doing
201 * one of two possible things. We are either adding an L4 tunnel
202 * header to the outer L3 tunnel header, or we are are simply
203 * treating the GRE tunnel header as though it is a UDP protocol
204 * specific header such as VXLAN or GENEVE.
206 NAPI_GRO_CB(skb)->encap_mark = 0;
208 /* Flag this frame as already having an outer encap header */
209 NAPI_GRO_CB(skb)->is_fou = 1;
212 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
213 ops = rcu_dereference(offloads[proto]);
214 if (!ops || !ops->callbacks.gro_receive)
217 pp = call_gro_receive(ops->callbacks.gro_receive, head, skb);
225 static int fou_gro_complete(struct sk_buff *skb, int nhoff,
226 struct udp_offload *uoff)
228 const struct net_offload *ops;
229 u8 proto = NAPI_GRO_CB(skb)->proto;
231 const struct net_offload **offloads;
233 udp_tunnel_gro_complete(skb, nhoff);
236 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
237 ops = rcu_dereference(offloads[proto]);
238 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
241 err = ops->callbacks.gro_complete(skb, nhoff);
249 static struct guehdr *gue_gro_remcsum(struct sk_buff *skb, unsigned int off,
250 struct guehdr *guehdr, void *data,
251 size_t hdrlen, struct gro_remcsum *grc,
255 size_t start = ntohs(pd[0]);
256 size_t offset = ntohs(pd[1]);
258 if (skb->remcsum_offload)
261 if (!NAPI_GRO_CB(skb)->csum_valid)
264 guehdr = skb_gro_remcsum_process(skb, (void *)guehdr, off, hdrlen,
265 start, offset, grc, nopartial);
267 skb->remcsum_offload = 1;
272 static struct sk_buff **gue_gro_receive(struct sk_buff **head,
274 struct udp_offload *uoff)
276 const struct net_offload **offloads;
277 const struct net_offload *ops;
278 struct sk_buff **pp = NULL;
280 struct guehdr *guehdr;
281 size_t len, optlen, hdrlen, off;
285 struct fou *fou = container_of(uoff, struct fou, udp_offloads);
286 struct gro_remcsum grc;
288 skb_gro_remcsum_init(&grc);
290 off = skb_gro_offset(skb);
291 len = off + sizeof(*guehdr);
293 guehdr = skb_gro_header_fast(skb, off);
294 if (skb_gro_header_hard(skb, len)) {
295 guehdr = skb_gro_header_slow(skb, len, off);
296 if (unlikely(!guehdr))
300 optlen = guehdr->hlen << 2;
303 if (skb_gro_header_hard(skb, len)) {
304 guehdr = skb_gro_header_slow(skb, len, off);
305 if (unlikely(!guehdr))
309 if (unlikely(guehdr->control) || guehdr->version != 0 ||
310 validate_gue_flags(guehdr, optlen))
313 hdrlen = sizeof(*guehdr) + optlen;
315 /* Adjust NAPI_GRO_CB(skb)->csum to account for guehdr,
316 * this is needed if there is a remote checkcsum offload.
318 skb_gro_postpull_rcsum(skb, guehdr, hdrlen);
322 if (guehdr->flags & GUE_FLAG_PRIV) {
323 __be32 flags = *(__be32 *)(data + doffset);
325 doffset += GUE_LEN_PRIV;
327 if (flags & GUE_PFLAG_REMCSUM) {
328 guehdr = gue_gro_remcsum(skb, off, guehdr,
329 data + doffset, hdrlen, &grc,
331 FOU_F_REMCSUM_NOPARTIAL));
338 doffset += GUE_PLEN_REMCSUM;
342 skb_gro_pull(skb, hdrlen);
346 for (p = *head; p; p = p->next) {
347 const struct guehdr *guehdr2;
349 if (!NAPI_GRO_CB(p)->same_flow)
352 guehdr2 = (struct guehdr *)(p->data + off);
354 /* Compare base GUE header to be equal (covers
355 * hlen, version, proto_ctype, and flags.
357 if (guehdr->word != guehdr2->word) {
358 NAPI_GRO_CB(p)->same_flow = 0;
362 /* Compare optional fields are the same. */
363 if (guehdr->hlen && memcmp(&guehdr[1], &guehdr2[1],
364 guehdr->hlen << 2)) {
365 NAPI_GRO_CB(p)->same_flow = 0;
370 /* We can clear the encap_mark for GUE as we are essentially doing
371 * one of two possible things. We are either adding an L4 tunnel
372 * header to the outer L3 tunnel header, or we are are simply
373 * treating the GRE tunnel header as though it is a UDP protocol
374 * specific header such as VXLAN or GENEVE.
376 NAPI_GRO_CB(skb)->encap_mark = 0;
378 /* Flag this frame as already having an outer encap header */
379 NAPI_GRO_CB(skb)->is_fou = 1;
382 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
383 ops = rcu_dereference(offloads[guehdr->proto_ctype]);
384 if (WARN_ON_ONCE(!ops || !ops->callbacks.gro_receive))
387 pp = call_gro_receive(ops->callbacks.gro_receive, head, skb);
392 NAPI_GRO_CB(skb)->flush |= flush;
393 skb_gro_remcsum_cleanup(skb, &grc);
398 static int gue_gro_complete(struct sk_buff *skb, int nhoff,
399 struct udp_offload *uoff)
401 const struct net_offload **offloads;
402 struct guehdr *guehdr = (struct guehdr *)(skb->data + nhoff);
403 const struct net_offload *ops;
404 unsigned int guehlen;
408 proto = guehdr->proto_ctype;
410 guehlen = sizeof(*guehdr) + (guehdr->hlen << 2);
413 offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
414 ops = rcu_dereference(offloads[proto]);
415 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
418 err = ops->callbacks.gro_complete(skb, nhoff + guehlen);
425 static int fou_add_to_port_list(struct net *net, struct fou *fou)
427 struct fou_net *fn = net_generic(net, fou_net_id);
430 mutex_lock(&fn->fou_lock);
431 list_for_each_entry(fout, &fn->fou_list, list) {
432 if (fou->port == fout->port) {
433 mutex_unlock(&fn->fou_lock);
438 list_add(&fou->list, &fn->fou_list);
439 mutex_unlock(&fn->fou_lock);
444 static void fou_release(struct fou *fou)
446 struct socket *sock = fou->sock;
447 struct sock *sk = sock->sk;
449 if (sk->sk_family == AF_INET)
450 udp_del_offload(&fou->udp_offloads);
451 list_del(&fou->list);
452 udp_tunnel_sock_release(sock);
457 static int fou_encap_init(struct sock *sk, struct fou *fou, struct fou_cfg *cfg)
459 udp_sk(sk)->encap_rcv = fou_udp_recv;
460 fou->protocol = cfg->protocol;
461 fou->udp_offloads.callbacks.gro_receive = fou_gro_receive;
462 fou->udp_offloads.callbacks.gro_complete = fou_gro_complete;
463 fou->udp_offloads.port = cfg->udp_config.local_udp_port;
464 fou->udp_offloads.ipproto = cfg->protocol;
469 static int gue_encap_init(struct sock *sk, struct fou *fou, struct fou_cfg *cfg)
471 udp_sk(sk)->encap_rcv = gue_udp_recv;
472 fou->udp_offloads.callbacks.gro_receive = gue_gro_receive;
473 fou->udp_offloads.callbacks.gro_complete = gue_gro_complete;
474 fou->udp_offloads.port = cfg->udp_config.local_udp_port;
479 static int fou_create(struct net *net, struct fou_cfg *cfg,
480 struct socket **sockp)
482 struct socket *sock = NULL;
483 struct fou *fou = NULL;
487 /* Open UDP socket */
488 err = udp_sock_create(net, &cfg->udp_config, &sock);
492 /* Allocate FOU port structure */
493 fou = kzalloc(sizeof(*fou), GFP_KERNEL);
501 fou->flags = cfg->flags;
502 fou->port = cfg->udp_config.local_udp_port;
504 /* Initial for fou type */
506 case FOU_ENCAP_DIRECT:
507 err = fou_encap_init(sk, fou, cfg);
512 err = gue_encap_init(sk, fou, cfg);
521 fou->type = cfg->type;
523 udp_sk(sk)->encap_type = 1;
526 sk->sk_user_data = fou;
529 inet_inc_convert_csum(sk);
531 sk->sk_allocation = GFP_ATOMIC;
533 if (cfg->udp_config.family == AF_INET) {
534 err = udp_add_offload(&fou->udp_offloads);
539 err = fou_add_to_port_list(net, fou);
551 udp_tunnel_sock_release(sock);
556 static int fou_destroy(struct net *net, struct fou_cfg *cfg)
558 struct fou_net *fn = net_generic(net, fou_net_id);
559 __be16 port = cfg->udp_config.local_udp_port;
563 mutex_lock(&fn->fou_lock);
564 list_for_each_entry(fou, &fn->fou_list, list) {
565 if (fou->port == port) {
571 mutex_unlock(&fn->fou_lock);
576 static struct genl_family fou_nl_family = {
577 .id = GENL_ID_GENERATE,
579 .name = FOU_GENL_NAME,
580 .version = FOU_GENL_VERSION,
581 .maxattr = FOU_ATTR_MAX,
585 static struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = {
586 [FOU_ATTR_PORT] = { .type = NLA_U16, },
587 [FOU_ATTR_AF] = { .type = NLA_U8, },
588 [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
589 [FOU_ATTR_TYPE] = { .type = NLA_U8, },
590 [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
593 static int parse_nl_config(struct genl_info *info,
596 memset(cfg, 0, sizeof(*cfg));
598 cfg->udp_config.family = AF_INET;
600 if (info->attrs[FOU_ATTR_AF]) {
601 u8 family = nla_get_u8(info->attrs[FOU_ATTR_AF]);
603 if (family != AF_INET)
606 cfg->udp_config.family = family;
609 if (info->attrs[FOU_ATTR_PORT]) {
610 __be16 port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
612 cfg->udp_config.local_udp_port = port;
615 if (info->attrs[FOU_ATTR_IPPROTO])
616 cfg->protocol = nla_get_u8(info->attrs[FOU_ATTR_IPPROTO]);
618 if (info->attrs[FOU_ATTR_TYPE])
619 cfg->type = nla_get_u8(info->attrs[FOU_ATTR_TYPE]);
621 if (info->attrs[FOU_ATTR_REMCSUM_NOPARTIAL])
622 cfg->flags |= FOU_F_REMCSUM_NOPARTIAL;
627 static int fou_nl_cmd_add_port(struct sk_buff *skb, struct genl_info *info)
629 struct net *net = genl_info_net(info);
633 err = parse_nl_config(info, &cfg);
637 return fou_create(net, &cfg, NULL);
640 static int fou_nl_cmd_rm_port(struct sk_buff *skb, struct genl_info *info)
642 struct net *net = genl_info_net(info);
646 err = parse_nl_config(info, &cfg);
650 return fou_destroy(net, &cfg);
653 static int fou_fill_info(struct fou *fou, struct sk_buff *msg)
655 if (nla_put_u8(msg, FOU_ATTR_AF, fou->sock->sk->sk_family) ||
656 nla_put_be16(msg, FOU_ATTR_PORT, fou->port) ||
657 nla_put_u8(msg, FOU_ATTR_IPPROTO, fou->protocol) ||
658 nla_put_u8(msg, FOU_ATTR_TYPE, fou->type))
661 if (fou->flags & FOU_F_REMCSUM_NOPARTIAL)
662 if (nla_put_flag(msg, FOU_ATTR_REMCSUM_NOPARTIAL))
667 static int fou_dump_info(struct fou *fou, u32 portid, u32 seq,
668 u32 flags, struct sk_buff *skb, u8 cmd)
672 hdr = genlmsg_put(skb, portid, seq, &fou_nl_family, flags, cmd);
676 if (fou_fill_info(fou, skb) < 0)
677 goto nla_put_failure;
679 genlmsg_end(skb, hdr);
683 genlmsg_cancel(skb, hdr);
687 static int fou_nl_cmd_get_port(struct sk_buff *skb, struct genl_info *info)
689 struct net *net = genl_info_net(info);
690 struct fou_net *fn = net_generic(net, fou_net_id);
697 ret = parse_nl_config(info, &cfg);
700 port = cfg.udp_config.local_udp_port;
704 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
709 mutex_lock(&fn->fou_lock);
710 list_for_each_entry(fout, &fn->fou_list, list) {
711 if (port == fout->port) {
712 ret = fou_dump_info(fout, info->snd_portid,
713 info->snd_seq, 0, msg,
718 mutex_unlock(&fn->fou_lock);
722 return genlmsg_reply(msg, info);
729 static int fou_nl_dump(struct sk_buff *skb, struct netlink_callback *cb)
731 struct net *net = sock_net(skb->sk);
732 struct fou_net *fn = net_generic(net, fou_net_id);
736 mutex_lock(&fn->fou_lock);
737 list_for_each_entry(fout, &fn->fou_list, list) {
738 if (idx++ < cb->args[0])
740 ret = fou_dump_info(fout, NETLINK_CB(cb->skb).portid,
741 cb->nlh->nlmsg_seq, NLM_F_MULTI,
746 mutex_unlock(&fn->fou_lock);
752 static const struct genl_ops fou_nl_ops[] = {
755 .doit = fou_nl_cmd_add_port,
756 .policy = fou_nl_policy,
757 .flags = GENL_ADMIN_PERM,
761 .doit = fou_nl_cmd_rm_port,
762 .policy = fou_nl_policy,
763 .flags = GENL_ADMIN_PERM,
767 .doit = fou_nl_cmd_get_port,
768 .dumpit = fou_nl_dump,
769 .policy = fou_nl_policy,
773 size_t fou_encap_hlen(struct ip_tunnel_encap *e)
775 return sizeof(struct udphdr);
777 EXPORT_SYMBOL(fou_encap_hlen);
779 size_t gue_encap_hlen(struct ip_tunnel_encap *e)
782 bool need_priv = false;
784 len = sizeof(struct udphdr) + sizeof(struct guehdr);
786 if (e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) {
787 len += GUE_PLEN_REMCSUM;
791 len += need_priv ? GUE_LEN_PRIV : 0;
795 EXPORT_SYMBOL(gue_encap_hlen);
797 static void fou_build_udp(struct sk_buff *skb, struct ip_tunnel_encap *e,
798 struct flowi4 *fl4, u8 *protocol, __be16 sport)
802 skb_push(skb, sizeof(struct udphdr));
803 skb_reset_transport_header(skb);
809 uh->len = htons(skb->len);
811 udp_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM), skb,
812 fl4->saddr, fl4->daddr, skb->len);
814 *protocol = IPPROTO_UDP;
817 int fou_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
818 u8 *protocol, struct flowi4 *fl4)
820 bool csum = !!(e->flags & TUNNEL_ENCAP_FLAG_CSUM);
821 int type = csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
824 skb = iptunnel_handle_offloads(skb, csum, type);
829 sport = e->sport ? : udp_flow_src_port(dev_net(skb->dev),
831 fou_build_udp(skb, e, fl4, protocol, sport);
835 EXPORT_SYMBOL(fou_build_header);
837 int gue_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
838 u8 *protocol, struct flowi4 *fl4)
840 bool csum = !!(e->flags & TUNNEL_ENCAP_FLAG_CSUM);
841 int type = csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
842 struct guehdr *guehdr;
843 size_t hdrlen, optlen = 0;
846 bool need_priv = false;
848 if ((e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) &&
849 skb->ip_summed == CHECKSUM_PARTIAL) {
851 optlen += GUE_PLEN_REMCSUM;
852 type |= SKB_GSO_TUNNEL_REMCSUM;
856 optlen += need_priv ? GUE_LEN_PRIV : 0;
858 skb = iptunnel_handle_offloads(skb, csum, type);
863 /* Get source port (based on flow hash) before skb_push */
864 sport = e->sport ? : udp_flow_src_port(dev_net(skb->dev),
867 hdrlen = sizeof(struct guehdr) + optlen;
869 skb_push(skb, hdrlen);
871 guehdr = (struct guehdr *)skb->data;
875 guehdr->hlen = optlen >> 2;
877 guehdr->proto_ctype = *protocol;
882 __be32 *flags = data;
884 guehdr->flags |= GUE_FLAG_PRIV;
886 data += GUE_LEN_PRIV;
888 if (type & SKB_GSO_TUNNEL_REMCSUM) {
889 u16 csum_start = skb_checksum_start_offset(skb);
892 if (csum_start < hdrlen)
895 csum_start -= hdrlen;
896 pd[0] = htons(csum_start);
897 pd[1] = htons(csum_start + skb->csum_offset);
899 if (!skb_is_gso(skb)) {
900 skb->ip_summed = CHECKSUM_NONE;
901 skb->encapsulation = 0;
904 *flags |= GUE_PFLAG_REMCSUM;
905 data += GUE_PLEN_REMCSUM;
910 fou_build_udp(skb, e, fl4, protocol, sport);
914 EXPORT_SYMBOL(gue_build_header);
916 #ifdef CONFIG_NET_FOU_IP_TUNNELS
918 static const struct ip_tunnel_encap_ops fou_iptun_ops = {
919 .encap_hlen = fou_encap_hlen,
920 .build_header = fou_build_header,
923 static const struct ip_tunnel_encap_ops gue_iptun_ops = {
924 .encap_hlen = gue_encap_hlen,
925 .build_header = gue_build_header,
928 static int ip_tunnel_encap_add_fou_ops(void)
932 ret = ip_tunnel_encap_add_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
934 pr_err("can't add fou ops\n");
938 ret = ip_tunnel_encap_add_ops(&gue_iptun_ops, TUNNEL_ENCAP_GUE);
940 pr_err("can't add gue ops\n");
941 ip_tunnel_encap_del_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
948 static void ip_tunnel_encap_del_fou_ops(void)
950 ip_tunnel_encap_del_ops(&fou_iptun_ops, TUNNEL_ENCAP_FOU);
951 ip_tunnel_encap_del_ops(&gue_iptun_ops, TUNNEL_ENCAP_GUE);
956 static int ip_tunnel_encap_add_fou_ops(void)
961 static void ip_tunnel_encap_del_fou_ops(void)
967 static __net_init int fou_init_net(struct net *net)
969 struct fou_net *fn = net_generic(net, fou_net_id);
971 INIT_LIST_HEAD(&fn->fou_list);
972 mutex_init(&fn->fou_lock);
976 static __net_exit void fou_exit_net(struct net *net)
978 struct fou_net *fn = net_generic(net, fou_net_id);
979 struct fou *fou, *next;
981 /* Close all the FOU sockets */
982 mutex_lock(&fn->fou_lock);
983 list_for_each_entry_safe(fou, next, &fn->fou_list, list)
985 mutex_unlock(&fn->fou_lock);
988 static struct pernet_operations fou_net_ops = {
989 .init = fou_init_net,
990 .exit = fou_exit_net,
992 .size = sizeof(struct fou_net),
995 static int __init fou_init(void)
999 ret = register_pernet_device(&fou_net_ops);
1003 ret = genl_register_family_with_ops(&fou_nl_family,
1008 ret = ip_tunnel_encap_add_fou_ops();
1012 genl_unregister_family(&fou_nl_family);
1014 unregister_pernet_device(&fou_net_ops);
1019 static void __exit fou_fini(void)
1021 ip_tunnel_encap_del_fou_ops();
1022 genl_unregister_family(&fou_nl_family);
1023 unregister_pernet_device(&fou_net_ops);
1026 module_init(fou_init);
1027 module_exit(fou_fini);
1028 MODULE_AUTHOR("Tom Herbert <therbert@google.com>");
1029 MODULE_LICENSE("GPL");