2 * GENEVE: Generic Network Virtualization Encapsulation
4 * Copyright (c) 2015 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/etherdevice.h>
16 #include <linux/hash.h>
17 #include <net/dst_metadata.h>
18 #include <net/gro_cells.h>
19 #include <net/rtnetlink.h>
20 #include <net/geneve.h>
21 #include <net/protocol.h>
23 #define GENEVE_NETDEV_VER "0.6"
25 #define GENEVE_UDP_PORT 6081
27 #define GENEVE_N_VID (1u << 24)
28 #define GENEVE_VID_MASK (GENEVE_N_VID - 1)
30 #define VNI_HASH_BITS 10
31 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
33 static bool log_ecn_error = true;
34 module_param(log_ecn_error, bool, 0644);
35 MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
38 #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
40 /* per-network namespace private data for this module */
42 struct list_head geneve_list;
43 struct list_head sock_list;
46 static int geneve_net_id;
49 struct sockaddr_in sin;
50 struct sockaddr_in6 sin6;
54 static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, };
56 /* Pseudo network device */
58 struct hlist_node hlist; /* vni hash table */
59 struct net *net; /* netns for packet i/o */
60 struct net_device *dev; /* netdev for geneve tunnel */
61 struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */
62 #if IS_ENABLED(CONFIG_IPV6)
63 struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */
65 u8 vni[3]; /* virtual network ID for tunnel */
66 u8 ttl; /* TTL override */
67 u8 tos; /* TOS override */
68 union geneve_addr remote; /* IP address for link partner */
69 struct list_head next; /* geneve's per namespace list */
70 __be32 label; /* IPv6 flowlabel override */
73 struct gro_cells gro_cells;
75 struct dst_cache dst_cache;
78 /* Geneve device flags */
79 #define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0)
80 #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1)
81 #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2)
85 struct list_head list;
89 struct hlist_head vni_list[VNI_HASH_SIZE];
93 static inline __u32 geneve_net_vni_hash(u8 vni[3])
97 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
98 return hash_32(vnid, VNI_HASH_BITS);
101 static __be64 vni_to_tunnel_id(const __u8 *vni)
104 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
106 return (__force __be64)(((__force u64)vni[0] << 40) |
107 ((__force u64)vni[1] << 48) |
108 ((__force u64)vni[2] << 56));
112 static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
114 return gs->sock->sk->sk_family;
117 static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
118 __be32 addr, u8 vni[])
120 struct hlist_head *vni_list_head;
121 struct geneve_dev *geneve;
124 /* Find the device for this VNI */
125 hash = geneve_net_vni_hash(vni);
126 vni_list_head = &gs->vni_list[hash];
127 hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
128 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
129 addr == geneve->remote.sin.sin_addr.s_addr)
135 #if IS_ENABLED(CONFIG_IPV6)
136 static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs,
137 struct in6_addr addr6, u8 vni[])
139 struct hlist_head *vni_list_head;
140 struct geneve_dev *geneve;
143 /* Find the device for this VNI */
144 hash = geneve_net_vni_hash(vni);
145 vni_list_head = &gs->vni_list[hash];
146 hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
147 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
148 ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr))
155 static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
157 return (struct genevehdr *)(udp_hdr(skb) + 1);
160 static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs,
165 static u8 zero_vni[3];
166 #if IS_ENABLED(CONFIG_IPV6)
167 static struct in6_addr zero_addr6;
170 if (geneve_get_sk_family(gs) == AF_INET) {
173 iph = ip_hdr(skb); /* outer IP header... */
175 if (gs->collect_md) {
179 vni = geneve_hdr(skb)->vni;
183 return geneve_lookup(gs, addr, vni);
184 #if IS_ENABLED(CONFIG_IPV6)
185 } else if (geneve_get_sk_family(gs) == AF_INET6) {
186 struct ipv6hdr *ip6h;
187 struct in6_addr addr6;
189 ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
191 if (gs->collect_md) {
195 vni = geneve_hdr(skb)->vni;
199 return geneve6_lookup(gs, addr6, vni);
205 /* geneve receive/decap routine */
206 static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
209 struct genevehdr *gnvh = geneve_hdr(skb);
210 struct metadata_dst *tun_dst = NULL;
211 struct pcpu_sw_netstats *stats;
215 if (ip_tunnel_collect_metadata() || gs->collect_md) {
218 flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
219 (gnvh->oam ? TUNNEL_OAM : 0) |
220 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
222 tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
223 vni_to_tunnel_id(gnvh->vni),
227 /* Update tunnel dst according to Geneve options. */
228 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
229 gnvh->options, gnvh->opt_len * 4);
231 /* Drop packets w/ critical options,
232 * since we don't support any...
238 skb_reset_mac_header(skb);
239 skb->protocol = eth_type_trans(skb, geneve->dev);
240 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
243 skb_dst_set(skb, &tun_dst->dst);
245 /* Ignore packet loops (and multicast echo) */
246 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr))
249 oiph = skb_network_header(skb);
250 skb_reset_network_header(skb);
252 if (geneve_get_sk_family(gs) == AF_INET)
253 err = IP_ECN_decapsulate(oiph, skb);
254 #if IS_ENABLED(CONFIG_IPV6)
256 err = IP6_ECN_decapsulate(oiph, skb);
261 if (geneve_get_sk_family(gs) == AF_INET)
262 net_info_ratelimited("non-ECT from %pI4 "
264 &((struct iphdr *)oiph)->saddr,
265 ((struct iphdr *)oiph)->tos);
266 #if IS_ENABLED(CONFIG_IPV6)
268 net_info_ratelimited("non-ECT from %pI6\n",
269 &((struct ipv6hdr *)oiph)->saddr);
273 ++geneve->dev->stats.rx_frame_errors;
274 ++geneve->dev->stats.rx_errors;
279 stats = this_cpu_ptr(geneve->dev->tstats);
280 u64_stats_update_begin(&stats->syncp);
282 stats->rx_bytes += skb->len;
283 u64_stats_update_end(&stats->syncp);
285 gro_cells_receive(&geneve->gro_cells, skb);
288 /* Consume bad packet */
292 /* Setup stats when device is created */
293 static int geneve_init(struct net_device *dev)
295 struct geneve_dev *geneve = netdev_priv(dev);
298 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
302 err = gro_cells_init(&geneve->gro_cells, dev);
304 free_percpu(dev->tstats);
308 err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL);
310 free_percpu(dev->tstats);
311 gro_cells_destroy(&geneve->gro_cells);
318 static void geneve_uninit(struct net_device *dev)
320 struct geneve_dev *geneve = netdev_priv(dev);
322 dst_cache_destroy(&geneve->dst_cache);
323 gro_cells_destroy(&geneve->gro_cells);
324 free_percpu(dev->tstats);
327 /* Callback from net/ipv4/udp.c to receive packets */
328 static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
330 struct genevehdr *geneveh;
331 struct geneve_dev *geneve;
332 struct geneve_sock *gs;
335 /* Need Geneve and inner Ethernet header to be present */
336 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
339 /* Return packets with reserved bits set */
340 geneveh = geneve_hdr(skb);
341 if (unlikely(geneveh->ver != GENEVE_VER))
344 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
347 gs = rcu_dereference_sk_user_data(sk);
351 geneve = geneve_lookup_skb(gs, skb);
355 opts_len = geneveh->opt_len * 4;
356 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
358 !net_eq(geneve->net, dev_net(geneve->dev))))
361 geneve_rx(geneve, gs, skb);
365 /* Consume bad packet */
370 static struct socket *geneve_create_sock(struct net *net, bool ipv6,
371 __be16 port, u32 flags)
374 struct udp_port_cfg udp_conf;
377 memset(&udp_conf, 0, sizeof(udp_conf));
380 udp_conf.family = AF_INET6;
381 udp_conf.ipv6_v6only = 1;
382 udp_conf.use_udp6_rx_checksums =
383 !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX);
385 udp_conf.family = AF_INET;
386 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
389 udp_conf.local_udp_port = port;
391 /* Open UDP socket */
392 err = udp_sock_create(net, &udp_conf, &sock);
399 static int geneve_hlen(struct genevehdr *gh)
401 return sizeof(*gh) + gh->opt_len * 4;
404 static struct sk_buff **geneve_gro_receive(struct sock *sk,
405 struct sk_buff **head,
408 struct sk_buff *p, **pp = NULL;
409 struct genevehdr *gh, *gh2;
410 unsigned int hlen, gh_len, off_gnv;
411 const struct packet_offload *ptype;
415 off_gnv = skb_gro_offset(skb);
416 hlen = off_gnv + sizeof(*gh);
417 gh = skb_gro_header_fast(skb, off_gnv);
418 if (skb_gro_header_hard(skb, hlen)) {
419 gh = skb_gro_header_slow(skb, hlen, off_gnv);
424 if (gh->ver != GENEVE_VER || gh->oam)
426 gh_len = geneve_hlen(gh);
428 hlen = off_gnv + gh_len;
429 if (skb_gro_header_hard(skb, hlen)) {
430 gh = skb_gro_header_slow(skb, hlen, off_gnv);
435 for (p = *head; p; p = p->next) {
436 if (!NAPI_GRO_CB(p)->same_flow)
439 gh2 = (struct genevehdr *)(p->data + off_gnv);
440 if (gh->opt_len != gh2->opt_len ||
441 memcmp(gh, gh2, gh_len)) {
442 NAPI_GRO_CB(p)->same_flow = 0;
447 type = gh->proto_type;
450 ptype = gro_find_receive_by_type(type);
454 skb_gro_pull(skb, gh_len);
455 skb_gro_postpull_rcsum(skb, gh, gh_len);
456 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
462 NAPI_GRO_CB(skb)->flush |= flush;
467 static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb,
470 struct genevehdr *gh;
471 struct packet_offload *ptype;
476 gh = (struct genevehdr *)(skb->data + nhoff);
477 gh_len = geneve_hlen(gh);
478 type = gh->proto_type;
481 ptype = gro_find_complete_by_type(type);
483 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
487 skb_set_inner_mac_header(skb, nhoff + gh_len);
492 /* Create new listen socket if needed */
493 static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
494 bool ipv6, u32 flags)
496 struct geneve_net *gn = net_generic(net, geneve_net_id);
497 struct geneve_sock *gs;
499 struct udp_tunnel_sock_cfg tunnel_cfg;
502 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
504 return ERR_PTR(-ENOMEM);
506 sock = geneve_create_sock(net, ipv6, port, flags);
509 return ERR_CAST(sock);
514 for (h = 0; h < VNI_HASH_SIZE; ++h)
515 INIT_HLIST_HEAD(&gs->vni_list[h]);
517 /* Initialize the geneve udp offloads structure */
518 udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
520 /* Mark socket as an encapsulation socket */
521 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
522 tunnel_cfg.sk_user_data = gs;
523 tunnel_cfg.encap_type = 1;
524 tunnel_cfg.gro_receive = geneve_gro_receive;
525 tunnel_cfg.gro_complete = geneve_gro_complete;
526 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
527 tunnel_cfg.encap_destroy = NULL;
528 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
529 list_add(&gs->list, &gn->sock_list);
533 static void __geneve_sock_release(struct geneve_sock *gs)
535 if (!gs || --gs->refcnt)
539 udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
540 udp_tunnel_sock_release(gs->sock);
544 static void geneve_sock_release(struct geneve_dev *geneve)
546 struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4);
547 #if IS_ENABLED(CONFIG_IPV6)
548 struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6);
550 rcu_assign_pointer(geneve->sock6, NULL);
553 rcu_assign_pointer(geneve->sock4, NULL);
556 __geneve_sock_release(gs4);
557 #if IS_ENABLED(CONFIG_IPV6)
558 __geneve_sock_release(gs6);
562 static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
566 struct geneve_sock *gs;
568 list_for_each_entry(gs, &gn->sock_list, list) {
569 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
570 geneve_get_sk_family(gs) == family) {
577 static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
579 struct net *net = geneve->net;
580 struct geneve_net *gn = net_generic(net, geneve_net_id);
581 struct geneve_sock *gs;
584 gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port);
590 gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags);
595 gs->collect_md = geneve->collect_md;
596 gs->flags = geneve->flags;
597 #if IS_ENABLED(CONFIG_IPV6)
599 rcu_assign_pointer(geneve->sock6, gs);
602 rcu_assign_pointer(geneve->sock4, gs);
604 hash = geneve_net_vni_hash(geneve->vni);
605 hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
609 static int geneve_open(struct net_device *dev)
611 struct geneve_dev *geneve = netdev_priv(dev);
612 bool ipv6 = geneve->remote.sa.sa_family == AF_INET6;
613 bool metadata = geneve->collect_md;
616 #if IS_ENABLED(CONFIG_IPV6)
617 if (ipv6 || metadata)
618 ret = geneve_sock_add(geneve, true);
620 if (!ret && (!ipv6 || metadata))
621 ret = geneve_sock_add(geneve, false);
623 geneve_sock_release(geneve);
628 static int geneve_stop(struct net_device *dev)
630 struct geneve_dev *geneve = netdev_priv(dev);
632 if (!hlist_unhashed(&geneve->hlist))
633 hlist_del_rcu(&geneve->hlist);
634 geneve_sock_release(geneve);
638 static void geneve_build_header(struct genevehdr *geneveh,
639 __be16 tun_flags, u8 vni[3],
640 u8 options_len, u8 *options)
642 geneveh->ver = GENEVE_VER;
643 geneveh->opt_len = options_len / 4;
644 geneveh->oam = !!(tun_flags & TUNNEL_OAM);
645 geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
647 memcpy(geneveh->vni, vni, 3);
648 geneveh->proto_type = htons(ETH_P_TEB);
651 memcpy(geneveh->options, options, options_len);
654 static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
655 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
656 u32 flags, bool xnet)
658 struct genevehdr *gnvh;
661 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX);
663 skb_scrub_packet(skb, xnet);
665 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
666 + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr);
667 err = skb_cow_head(skb, min_headroom);
671 err = udp_tunnel_handle_offloads(skb, udp_sum);
675 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
676 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
678 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
686 #if IS_ENABLED(CONFIG_IPV6)
687 static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb,
688 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
689 u32 flags, bool xnet)
691 struct genevehdr *gnvh;
694 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX);
696 skb_scrub_packet(skb, xnet);
698 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
699 + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr);
700 err = skb_cow_head(skb, min_headroom);
704 err = udp_tunnel_handle_offloads(skb, udp_sum);
708 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
709 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
711 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
720 static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
721 struct net_device *dev,
723 struct ip_tunnel_info *info)
725 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
726 struct geneve_dev *geneve = netdev_priv(dev);
727 struct dst_cache *dst_cache;
728 struct rtable *rt = NULL;
731 if (!rcu_dereference(geneve->sock4))
732 return ERR_PTR(-EIO);
734 memset(fl4, 0, sizeof(*fl4));
735 fl4->flowi4_mark = skb->mark;
736 fl4->flowi4_proto = IPPROTO_UDP;
739 fl4->daddr = info->key.u.ipv4.dst;
740 fl4->saddr = info->key.u.ipv4.src;
741 fl4->flowi4_tos = RT_TOS(info->key.tos);
742 dst_cache = &info->dst_cache;
746 const struct iphdr *iip = ip_hdr(skb);
748 tos = ip_tunnel_get_dsfield(iip, skb);
752 fl4->flowi4_tos = RT_TOS(tos);
753 fl4->daddr = geneve->remote.sin.sin_addr.s_addr;
754 dst_cache = &geneve->dst_cache;
758 rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
763 rt = ip_route_output_key(geneve->net, fl4);
765 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
766 return ERR_PTR(-ENETUNREACH);
768 if (rt->dst.dev == dev) { /* is this necessary? */
769 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
771 return ERR_PTR(-ELOOP);
774 dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
778 #if IS_ENABLED(CONFIG_IPV6)
779 static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
780 struct net_device *dev,
782 struct ip_tunnel_info *info)
784 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
785 struct geneve_dev *geneve = netdev_priv(dev);
786 struct dst_entry *dst = NULL;
787 struct dst_cache *dst_cache;
788 struct geneve_sock *gs6;
791 gs6 = rcu_dereference(geneve->sock6);
793 return ERR_PTR(-EIO);
795 memset(fl6, 0, sizeof(*fl6));
796 fl6->flowi6_mark = skb->mark;
797 fl6->flowi6_proto = IPPROTO_UDP;
800 fl6->daddr = info->key.u.ipv6.dst;
801 fl6->saddr = info->key.u.ipv6.src;
802 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos),
804 dst_cache = &info->dst_cache;
808 const struct iphdr *iip = ip_hdr(skb);
810 prio = ip_tunnel_get_dsfield(iip, skb);
814 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
816 fl6->daddr = geneve->remote.sin6.sin6_addr;
817 dst_cache = &geneve->dst_cache;
821 dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
826 if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) {
827 netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr);
828 return ERR_PTR(-ENETUNREACH);
830 if (dst->dev == dev) { /* is this necessary? */
831 netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr);
833 return ERR_PTR(-ELOOP);
837 dst_cache_set_ip6(dst_cache, dst, &fl6->saddr);
842 /* Convert 64 bit tunnel ID to 24 bit VNI. */
843 static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
846 vni[0] = (__force __u8)(tun_id >> 16);
847 vni[1] = (__force __u8)(tun_id >> 8);
848 vni[2] = (__force __u8)tun_id;
850 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
851 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
852 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
856 static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
857 struct ip_tunnel_info *info)
859 struct geneve_dev *geneve = netdev_priv(dev);
860 struct geneve_sock *gs4;
861 struct rtable *rt = NULL;
867 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
868 u32 flags = geneve->flags;
870 gs4 = rcu_dereference(geneve->sock4);
874 if (geneve->collect_md) {
875 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
876 netdev_dbg(dev, "no tunnel metadata\n");
879 if (info && ip_tunnel_info_af(info) != AF_INET)
883 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
889 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
890 skb_reset_mac_header(skb);
893 const struct ip_tunnel_key *key = &info->key;
897 tunnel_id_to_vni(key->tun_id, vni);
898 if (info->options_len)
899 opts = ip_tunnel_info_opts(info);
901 if (key->tun_flags & TUNNEL_CSUM)
902 flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX;
904 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
906 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
907 info->options_len, opts, flags, xnet);
911 tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
913 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
915 err = geneve_build_skb(rt, skb, 0, geneve->vni,
916 0, NULL, flags, xnet);
920 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
922 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
924 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
927 udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
928 tos, ttl, df, sport, geneve->dst_port,
929 !net_eq(geneve->net, dev_net(geneve->dev)),
930 !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX));
938 dev->stats.collisions++;
939 else if (err == -ENETUNREACH)
940 dev->stats.tx_carrier_errors++;
942 dev->stats.tx_errors++;
946 #if IS_ENABLED(CONFIG_IPV6)
947 static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
948 struct ip_tunnel_info *info)
950 struct geneve_dev *geneve = netdev_priv(dev);
951 struct dst_entry *dst = NULL;
952 struct geneve_sock *gs6;
958 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
959 u32 flags = geneve->flags;
961 gs6 = rcu_dereference(geneve->sock6);
965 if (geneve->collect_md) {
966 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
967 netdev_dbg(dev, "no tunnel metadata\n");
972 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
978 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
979 skb_reset_mac_header(skb);
982 const struct ip_tunnel_key *key = &info->key;
986 tunnel_id_to_vni(key->tun_id, vni);
987 if (info->options_len)
988 opts = ip_tunnel_info_opts(info);
990 if (key->tun_flags & TUNNEL_CSUM)
991 flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX;
993 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
995 err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
996 info->options_len, opts,
1001 prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
1003 label = info->key.label;
1005 err = geneve6_build_skb(dst, skb, 0, geneve->vni,
1006 0, NULL, flags, xnet);
1010 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1013 if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
1015 ttl = ttl ? : ip6_dst_hoplimit(dst);
1016 label = geneve->label;
1019 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
1020 &fl6.saddr, &fl6.daddr, prio, ttl, label,
1021 sport, geneve->dst_port,
1022 !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
1023 return NETDEV_TX_OK;
1029 dev->stats.collisions++;
1030 else if (err == -ENETUNREACH)
1031 dev->stats.tx_carrier_errors++;
1033 dev->stats.tx_errors++;
1034 return NETDEV_TX_OK;
1038 static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1040 struct geneve_dev *geneve = netdev_priv(dev);
1041 struct ip_tunnel_info *info = NULL;
1043 if (geneve->collect_md)
1044 info = skb_tunnel_info(skb);
1046 #if IS_ENABLED(CONFIG_IPV6)
1047 if ((info && ip_tunnel_info_af(info) == AF_INET6) ||
1048 (!info && geneve->remote.sa.sa_family == AF_INET6))
1049 return geneve6_xmit_skb(skb, dev, info);
1051 return geneve_xmit_skb(skb, dev, info);
1054 static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict)
1056 struct geneve_dev *geneve = netdev_priv(dev);
1057 /* The max_mtu calculation does not take account of GENEVE
1058 * options, to avoid excluding potentially valid
1061 int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1063 if (geneve->remote.sa.sa_family == AF_INET6)
1064 max_mtu -= sizeof(struct ipv6hdr);
1066 max_mtu -= sizeof(struct iphdr);
1071 if (new_mtu > max_mtu) {
1082 static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1084 return __geneve_change_mtu(dev, new_mtu, true);
1087 static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1089 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1090 struct geneve_dev *geneve = netdev_priv(dev);
1093 #if IS_ENABLED(CONFIG_IPV6)
1094 struct dst_entry *dst;
1098 if (ip_tunnel_info_af(info) == AF_INET) {
1099 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
1104 info->key.u.ipv4.src = fl4.saddr;
1105 #if IS_ENABLED(CONFIG_IPV6)
1106 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1107 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
1109 return PTR_ERR(dst);
1112 info->key.u.ipv6.src = fl6.saddr;
1118 info->key.tp_src = udp_flow_src_port(geneve->net, skb,
1119 1, USHRT_MAX, true);
1120 info->key.tp_dst = geneve->dst_port;
1124 static const struct net_device_ops geneve_netdev_ops = {
1125 .ndo_init = geneve_init,
1126 .ndo_uninit = geneve_uninit,
1127 .ndo_open = geneve_open,
1128 .ndo_stop = geneve_stop,
1129 .ndo_start_xmit = geneve_xmit,
1130 .ndo_get_stats64 = ip_tunnel_get_stats64,
1131 .ndo_change_mtu = geneve_change_mtu,
1132 .ndo_validate_addr = eth_validate_addr,
1133 .ndo_set_mac_address = eth_mac_addr,
1134 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
1137 static void geneve_get_drvinfo(struct net_device *dev,
1138 struct ethtool_drvinfo *drvinfo)
1140 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1141 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1144 static const struct ethtool_ops geneve_ethtool_ops = {
1145 .get_drvinfo = geneve_get_drvinfo,
1146 .get_link = ethtool_op_get_link,
1149 /* Info for udev, that this is a virtual tunnel endpoint */
1150 static struct device_type geneve_type = {
1154 /* Calls the ndo_udp_tunnel_add of the caller in order to
1155 * supply the listening GENEVE udp ports. Callers are expected
1156 * to implement the ndo_udp_tunnel_add.
1158 static void geneve_push_rx_ports(struct net_device *dev)
1160 struct net *net = dev_net(dev);
1161 struct geneve_net *gn = net_generic(net, geneve_net_id);
1162 struct geneve_sock *gs;
1165 list_for_each_entry_rcu(gs, &gn->sock_list, list)
1166 udp_tunnel_push_rx_port(dev, gs->sock,
1167 UDP_TUNNEL_TYPE_GENEVE);
1171 /* Initialize the device structure. */
1172 static void geneve_setup(struct net_device *dev)
1176 dev->netdev_ops = &geneve_netdev_ops;
1177 dev->ethtool_ops = &geneve_ethtool_ops;
1178 dev->destructor = free_netdev;
1180 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1182 dev->features |= NETIF_F_LLTX;
1183 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1184 dev->features |= NETIF_F_RXCSUM;
1185 dev->features |= NETIF_F_GSO_SOFTWARE;
1187 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1188 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1190 netif_keep_dst(dev);
1191 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1192 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
1193 eth_hw_addr_random(dev);
1196 static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1197 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1198 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
1199 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
1200 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
1201 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
1202 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
1203 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
1204 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
1205 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1206 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1207 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
1210 static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
1212 if (tb[IFLA_ADDRESS]) {
1213 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1216 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1217 return -EADDRNOTAVAIL;
1223 if (data[IFLA_GENEVE_ID]) {
1224 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1226 if (vni >= GENEVE_VID_MASK)
1233 static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1235 union geneve_addr *remote,
1237 bool *tun_on_same_port,
1238 bool *tun_collect_md)
1240 struct geneve_dev *geneve, *t;
1242 *tun_on_same_port = false;
1243 *tun_collect_md = false;
1245 list_for_each_entry(geneve, &gn->geneve_list, next) {
1246 if (geneve->dst_port == dst_port) {
1247 *tun_collect_md = geneve->collect_md;
1248 *tun_on_same_port = true;
1250 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
1251 !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
1252 dst_port == geneve->dst_port)
1258 static int geneve_configure(struct net *net, struct net_device *dev,
1259 union geneve_addr *remote,
1260 __u32 vni, __u8 ttl, __u8 tos, __be32 label,
1261 __be16 dst_port, bool metadata, u32 flags)
1263 struct geneve_net *gn = net_generic(net, geneve_net_id);
1264 struct geneve_dev *t, *geneve = netdev_priv(dev);
1265 bool tun_collect_md, tun_on_same_port;
1271 (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label))
1277 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
1278 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
1279 geneve->vni[2] = vni & 0x000000ff;
1281 if ((remote->sa.sa_family == AF_INET &&
1282 IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) ||
1283 (remote->sa.sa_family == AF_INET6 &&
1284 ipv6_addr_is_multicast(&remote->sin6.sin6_addr)))
1286 if (label && remote->sa.sa_family != AF_INET6)
1289 geneve->remote = *remote;
1293 geneve->label = label;
1294 geneve->dst_port = dst_port;
1295 geneve->collect_md = metadata;
1296 geneve->flags = flags;
1298 t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
1299 &tun_on_same_port, &tun_collect_md);
1303 /* make enough headroom for basic scenario */
1304 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1305 if (remote->sa.sa_family == AF_INET)
1306 encap_len += sizeof(struct iphdr);
1308 encap_len += sizeof(struct ipv6hdr);
1309 dev->needed_headroom = encap_len + ETH_HLEN;
1312 if (tun_on_same_port)
1319 dst_cache_reset(&geneve->dst_cache);
1321 err = register_netdevice(dev);
1325 list_add(&geneve->next, &gn->geneve_list);
1329 static int geneve_newlink(struct net *net, struct net_device *dev,
1330 struct nlattr *tb[], struct nlattr *data[])
1332 __be16 dst_port = htons(GENEVE_UDP_PORT);
1333 __u8 ttl = 0, tos = 0;
1334 bool metadata = false;
1335 union geneve_addr remote = geneve_remote_unspec;
1340 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6])
1343 if (data[IFLA_GENEVE_REMOTE]) {
1344 remote.sa.sa_family = AF_INET;
1345 remote.sin.sin_addr.s_addr =
1346 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1349 if (data[IFLA_GENEVE_REMOTE6]) {
1350 if (!IS_ENABLED(CONFIG_IPV6))
1351 return -EPFNOSUPPORT;
1353 remote.sa.sa_family = AF_INET6;
1354 remote.sin6.sin6_addr =
1355 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1357 if (ipv6_addr_type(&remote.sin6.sin6_addr) &
1358 IPV6_ADDR_LINKLOCAL) {
1359 netdev_dbg(dev, "link-local remote is unsupported\n");
1364 if (data[IFLA_GENEVE_ID])
1365 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1367 if (data[IFLA_GENEVE_TTL])
1368 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1370 if (data[IFLA_GENEVE_TOS])
1371 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1373 if (data[IFLA_GENEVE_LABEL])
1374 label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1375 IPV6_FLOWLABEL_MASK;
1377 if (data[IFLA_GENEVE_PORT])
1378 dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]);
1380 if (data[IFLA_GENEVE_COLLECT_METADATA])
1383 if (data[IFLA_GENEVE_UDP_CSUM] &&
1384 !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1385 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
1387 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
1388 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1389 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1391 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] &&
1392 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1393 flags |= GENEVE_F_UDP_ZERO_CSUM6_RX;
1395 return geneve_configure(net, dev, &remote, vni, ttl, tos, label,
1396 dst_port, metadata, flags);
1399 static void geneve_dellink(struct net_device *dev, struct list_head *head)
1401 struct geneve_dev *geneve = netdev_priv(dev);
1403 list_del(&geneve->next);
1404 unregister_netdevice_queue(dev, head);
1407 static size_t geneve_get_size(const struct net_device *dev)
1409 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
1410 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
1411 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
1412 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
1413 nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */
1414 nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
1415 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
1416 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */
1417 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
1418 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
1422 static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1424 struct geneve_dev *geneve = netdev_priv(dev);
1427 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
1428 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1429 goto nla_put_failure;
1431 if (geneve->remote.sa.sa_family == AF_INET) {
1432 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1433 geneve->remote.sin.sin_addr.s_addr))
1434 goto nla_put_failure;
1435 #if IS_ENABLED(CONFIG_IPV6)
1437 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1438 &geneve->remote.sin6.sin6_addr))
1439 goto nla_put_failure;
1443 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
1444 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) ||
1445 nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label))
1446 goto nla_put_failure;
1448 if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port))
1449 goto nla_put_failure;
1451 if (geneve->collect_md) {
1452 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1453 goto nla_put_failure;
1456 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
1457 !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) ||
1458 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1459 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) ||
1460 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1461 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)))
1462 goto nla_put_failure;
1470 static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1472 .maxtype = IFLA_GENEVE_MAX,
1473 .policy = geneve_policy,
1474 .priv_size = sizeof(struct geneve_dev),
1475 .setup = geneve_setup,
1476 .validate = geneve_validate,
1477 .newlink = geneve_newlink,
1478 .dellink = geneve_dellink,
1479 .get_size = geneve_get_size,
1480 .fill_info = geneve_fill_info,
1483 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1484 u8 name_assign_type, u16 dst_port)
1486 struct nlattr *tb[IFLA_MAX + 1];
1487 struct net_device *dev;
1488 LIST_HEAD(list_kill);
1491 memset(tb, 0, sizeof(tb));
1492 dev = rtnl_create_link(net, name, name_assign_type,
1493 &geneve_link_ops, tb);
1497 err = geneve_configure(net, dev, &geneve_remote_unspec,
1498 0, 0, 0, 0, htons(dst_port), true,
1499 GENEVE_F_UDP_ZERO_CSUM6_RX);
1502 return ERR_PTR(err);
1505 /* openvswitch users expect packet sizes to be unrestricted,
1506 * so set the largest MTU we can.
1508 err = __geneve_change_mtu(dev, IP_MAX_MTU, false);
1512 err = rtnl_configure_link(dev, NULL);
1519 geneve_dellink(dev, &list_kill);
1520 unregister_netdevice_many(&list_kill);
1521 return ERR_PTR(err);
1523 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1525 static int geneve_netdevice_event(struct notifier_block *unused,
1526 unsigned long event, void *ptr)
1528 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1530 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
1531 geneve_push_rx_ports(dev);
1536 static struct notifier_block geneve_notifier_block __read_mostly = {
1537 .notifier_call = geneve_netdevice_event,
1540 static __net_init int geneve_init_net(struct net *net)
1542 struct geneve_net *gn = net_generic(net, geneve_net_id);
1544 INIT_LIST_HEAD(&gn->geneve_list);
1545 INIT_LIST_HEAD(&gn->sock_list);
1549 static void __net_exit geneve_exit_net(struct net *net)
1551 struct geneve_net *gn = net_generic(net, geneve_net_id);
1552 struct geneve_dev *geneve, *next;
1553 struct net_device *dev, *aux;
1558 /* gather any geneve devices that were moved into this ns */
1559 for_each_netdev_safe(net, dev, aux)
1560 if (dev->rtnl_link_ops == &geneve_link_ops)
1561 unregister_netdevice_queue(dev, &list);
1563 /* now gather any other geneve devices that were created in this ns */
1564 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1565 /* If geneve->dev is in the same netns, it was already added
1566 * to the list by the previous loop.
1568 if (!net_eq(dev_net(geneve->dev), net))
1569 unregister_netdevice_queue(geneve->dev, &list);
1572 /* unregister the devices gathered above */
1573 unregister_netdevice_many(&list);
1577 static struct pernet_operations geneve_net_ops = {
1578 .init = geneve_init_net,
1579 .exit = geneve_exit_net,
1580 .id = &geneve_net_id,
1581 .size = sizeof(struct geneve_net),
1584 static int __init geneve_init_module(void)
1588 rc = register_pernet_subsys(&geneve_net_ops);
1592 rc = register_netdevice_notifier(&geneve_notifier_block);
1596 rc = rtnl_link_register(&geneve_link_ops);
1603 unregister_netdevice_notifier(&geneve_notifier_block);
1605 unregister_pernet_subsys(&geneve_net_ops);
1609 late_initcall(geneve_init_module);
1611 static void __exit geneve_cleanup_module(void)
1613 rtnl_link_unregister(&geneve_link_ops);
1614 unregister_netdevice_notifier(&geneve_notifier_block);
1615 unregister_pernet_subsys(&geneve_net_ops);
1617 module_exit(geneve_cleanup_module);
1619 MODULE_LICENSE("GPL");
1620 MODULE_VERSION(GENEVE_NETDEV_VER);
1621 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1622 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1623 MODULE_ALIAS_RTNL_LINK("geneve");