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;
862 const struct iphdr *iip; /* interior IP header */
868 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
869 u32 flags = geneve->flags;
871 gs4 = rcu_dereference(geneve->sock4);
875 if (geneve->collect_md) {
876 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
877 netdev_dbg(dev, "no tunnel metadata\n");
880 if (info && ip_tunnel_info_af(info) != AF_INET)
884 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
890 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
891 skb_reset_mac_header(skb);
896 const struct ip_tunnel_key *key = &info->key;
900 tunnel_id_to_vni(key->tun_id, vni);
901 if (info->options_len)
902 opts = ip_tunnel_info_opts(info);
904 if (key->tun_flags & TUNNEL_CSUM)
905 flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX;
907 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
909 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
910 info->options_len, opts, flags, xnet);
914 tos = ip_tunnel_ecn_encap(key->tos, iip, skb);
916 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
918 err = geneve_build_skb(rt, skb, 0, geneve->vni,
919 0, NULL, flags, xnet);
923 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb);
925 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
927 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
930 udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
931 tos, ttl, df, sport, geneve->dst_port,
932 !net_eq(geneve->net, dev_net(geneve->dev)),
933 !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX));
941 dev->stats.collisions++;
942 else if (err == -ENETUNREACH)
943 dev->stats.tx_carrier_errors++;
945 dev->stats.tx_errors++;
949 #if IS_ENABLED(CONFIG_IPV6)
950 static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
951 struct ip_tunnel_info *info)
953 struct geneve_dev *geneve = netdev_priv(dev);
954 struct dst_entry *dst = NULL;
955 const struct iphdr *iip; /* interior IP header */
956 struct geneve_sock *gs6;
962 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
963 u32 flags = geneve->flags;
965 gs6 = rcu_dereference(geneve->sock6);
969 if (geneve->collect_md) {
970 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
971 netdev_dbg(dev, "no tunnel metadata\n");
976 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
982 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
983 skb_reset_mac_header(skb);
988 const struct ip_tunnel_key *key = &info->key;
992 tunnel_id_to_vni(key->tun_id, vni);
993 if (info->options_len)
994 opts = ip_tunnel_info_opts(info);
996 if (key->tun_flags & TUNNEL_CSUM)
997 flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX;
999 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1001 err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
1002 info->options_len, opts,
1007 prio = ip_tunnel_ecn_encap(key->tos, iip, skb);
1009 label = info->key.label;
1011 err = geneve6_build_skb(dst, skb, 0, geneve->vni,
1012 0, NULL, flags, xnet);
1016 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1019 if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
1021 ttl = ttl ? : ip6_dst_hoplimit(dst);
1022 label = geneve->label;
1025 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
1026 &fl6.saddr, &fl6.daddr, prio, ttl, label,
1027 sport, geneve->dst_port,
1028 !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
1029 return NETDEV_TX_OK;
1035 dev->stats.collisions++;
1036 else if (err == -ENETUNREACH)
1037 dev->stats.tx_carrier_errors++;
1039 dev->stats.tx_errors++;
1040 return NETDEV_TX_OK;
1044 static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1046 struct geneve_dev *geneve = netdev_priv(dev);
1047 struct ip_tunnel_info *info = NULL;
1049 if (geneve->collect_md)
1050 info = skb_tunnel_info(skb);
1052 #if IS_ENABLED(CONFIG_IPV6)
1053 if ((info && ip_tunnel_info_af(info) == AF_INET6) ||
1054 (!info && geneve->remote.sa.sa_family == AF_INET6))
1055 return geneve6_xmit_skb(skb, dev, info);
1057 return geneve_xmit_skb(skb, dev, info);
1060 static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1062 /* Only possible if called internally, ndo_change_mtu path's new_mtu
1063 * is guaranteed to be between dev->min_mtu and dev->max_mtu.
1065 if (new_mtu > dev->max_mtu)
1066 new_mtu = dev->max_mtu;
1072 static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1074 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1075 struct geneve_dev *geneve = netdev_priv(dev);
1078 #if IS_ENABLED(CONFIG_IPV6)
1079 struct dst_entry *dst;
1083 if (ip_tunnel_info_af(info) == AF_INET) {
1084 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
1089 info->key.u.ipv4.src = fl4.saddr;
1090 #if IS_ENABLED(CONFIG_IPV6)
1091 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1092 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
1094 return PTR_ERR(dst);
1097 info->key.u.ipv6.src = fl6.saddr;
1103 info->key.tp_src = udp_flow_src_port(geneve->net, skb,
1104 1, USHRT_MAX, true);
1105 info->key.tp_dst = geneve->dst_port;
1109 static const struct net_device_ops geneve_netdev_ops = {
1110 .ndo_init = geneve_init,
1111 .ndo_uninit = geneve_uninit,
1112 .ndo_open = geneve_open,
1113 .ndo_stop = geneve_stop,
1114 .ndo_start_xmit = geneve_xmit,
1115 .ndo_get_stats64 = ip_tunnel_get_stats64,
1116 .ndo_change_mtu = geneve_change_mtu,
1117 .ndo_validate_addr = eth_validate_addr,
1118 .ndo_set_mac_address = eth_mac_addr,
1119 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
1122 static void geneve_get_drvinfo(struct net_device *dev,
1123 struct ethtool_drvinfo *drvinfo)
1125 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1126 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1129 static const struct ethtool_ops geneve_ethtool_ops = {
1130 .get_drvinfo = geneve_get_drvinfo,
1131 .get_link = ethtool_op_get_link,
1134 /* Info for udev, that this is a virtual tunnel endpoint */
1135 static struct device_type geneve_type = {
1139 /* Calls the ndo_udp_tunnel_add of the caller in order to
1140 * supply the listening GENEVE udp ports. Callers are expected
1141 * to implement the ndo_udp_tunnel_add.
1143 static void geneve_push_rx_ports(struct net_device *dev)
1145 struct net *net = dev_net(dev);
1146 struct geneve_net *gn = net_generic(net, geneve_net_id);
1147 struct geneve_sock *gs;
1150 list_for_each_entry_rcu(gs, &gn->sock_list, list)
1151 udp_tunnel_push_rx_port(dev, gs->sock,
1152 UDP_TUNNEL_TYPE_GENEVE);
1156 /* Initialize the device structure. */
1157 static void geneve_setup(struct net_device *dev)
1161 dev->netdev_ops = &geneve_netdev_ops;
1162 dev->ethtool_ops = &geneve_ethtool_ops;
1163 dev->destructor = free_netdev;
1165 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1167 dev->features |= NETIF_F_LLTX;
1168 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1169 dev->features |= NETIF_F_RXCSUM;
1170 dev->features |= NETIF_F_GSO_SOFTWARE;
1172 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1173 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1175 /* MTU range: 68 - (something less than 65535) */
1176 dev->min_mtu = ETH_MIN_MTU;
1177 /* The max_mtu calculation does not take account of GENEVE
1178 * options, to avoid excluding potentially valid
1179 * configurations. This will be further reduced by IPvX hdr size.
1181 dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1183 netif_keep_dst(dev);
1184 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1185 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
1186 eth_hw_addr_random(dev);
1189 static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1190 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1191 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
1192 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
1193 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
1194 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
1195 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
1196 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
1197 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
1198 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1199 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1200 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
1203 static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
1205 if (tb[IFLA_ADDRESS]) {
1206 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1209 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1210 return -EADDRNOTAVAIL;
1216 if (data[IFLA_GENEVE_ID]) {
1217 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1219 if (vni >= GENEVE_VID_MASK)
1226 static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1228 union geneve_addr *remote,
1230 bool *tun_on_same_port,
1231 bool *tun_collect_md)
1233 struct geneve_dev *geneve, *t;
1235 *tun_on_same_port = false;
1236 *tun_collect_md = false;
1238 list_for_each_entry(geneve, &gn->geneve_list, next) {
1239 if (geneve->dst_port == dst_port) {
1240 *tun_collect_md = geneve->collect_md;
1241 *tun_on_same_port = true;
1243 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
1244 !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
1245 dst_port == geneve->dst_port)
1251 static int geneve_configure(struct net *net, struct net_device *dev,
1252 union geneve_addr *remote,
1253 __u32 vni, __u8 ttl, __u8 tos, __be32 label,
1254 __be16 dst_port, bool metadata, u32 flags)
1256 struct geneve_net *gn = net_generic(net, geneve_net_id);
1257 struct geneve_dev *t, *geneve = netdev_priv(dev);
1258 bool tun_collect_md, tun_on_same_port;
1264 (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label))
1270 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
1271 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
1272 geneve->vni[2] = vni & 0x000000ff;
1274 if ((remote->sa.sa_family == AF_INET &&
1275 IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) ||
1276 (remote->sa.sa_family == AF_INET6 &&
1277 ipv6_addr_is_multicast(&remote->sin6.sin6_addr)))
1279 if (label && remote->sa.sa_family != AF_INET6)
1282 geneve->remote = *remote;
1286 geneve->label = label;
1287 geneve->dst_port = dst_port;
1288 geneve->collect_md = metadata;
1289 geneve->flags = flags;
1291 t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
1292 &tun_on_same_port, &tun_collect_md);
1296 /* make enough headroom for basic scenario */
1297 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1298 if (remote->sa.sa_family == AF_INET) {
1299 encap_len += sizeof(struct iphdr);
1300 dev->max_mtu -= sizeof(struct iphdr);
1302 encap_len += sizeof(struct ipv6hdr);
1303 dev->max_mtu -= sizeof(struct ipv6hdr);
1305 dev->needed_headroom = encap_len + ETH_HLEN;
1308 if (tun_on_same_port)
1315 dst_cache_reset(&geneve->dst_cache);
1317 err = register_netdevice(dev);
1321 list_add(&geneve->next, &gn->geneve_list);
1325 static int geneve_newlink(struct net *net, struct net_device *dev,
1326 struct nlattr *tb[], struct nlattr *data[])
1328 __be16 dst_port = htons(GENEVE_UDP_PORT);
1329 __u8 ttl = 0, tos = 0;
1330 bool metadata = false;
1331 union geneve_addr remote = geneve_remote_unspec;
1336 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6])
1339 if (data[IFLA_GENEVE_REMOTE]) {
1340 remote.sa.sa_family = AF_INET;
1341 remote.sin.sin_addr.s_addr =
1342 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1345 if (data[IFLA_GENEVE_REMOTE6]) {
1346 if (!IS_ENABLED(CONFIG_IPV6))
1347 return -EPFNOSUPPORT;
1349 remote.sa.sa_family = AF_INET6;
1350 remote.sin6.sin6_addr =
1351 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1353 if (ipv6_addr_type(&remote.sin6.sin6_addr) &
1354 IPV6_ADDR_LINKLOCAL) {
1355 netdev_dbg(dev, "link-local remote is unsupported\n");
1360 if (data[IFLA_GENEVE_ID])
1361 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1363 if (data[IFLA_GENEVE_TTL])
1364 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1366 if (data[IFLA_GENEVE_TOS])
1367 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1369 if (data[IFLA_GENEVE_LABEL])
1370 label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1371 IPV6_FLOWLABEL_MASK;
1373 if (data[IFLA_GENEVE_PORT])
1374 dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]);
1376 if (data[IFLA_GENEVE_COLLECT_METADATA])
1379 if (data[IFLA_GENEVE_UDP_CSUM] &&
1380 !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1381 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
1383 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
1384 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1385 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1387 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] &&
1388 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1389 flags |= GENEVE_F_UDP_ZERO_CSUM6_RX;
1391 return geneve_configure(net, dev, &remote, vni, ttl, tos, label,
1392 dst_port, metadata, flags);
1395 static void geneve_dellink(struct net_device *dev, struct list_head *head)
1397 struct geneve_dev *geneve = netdev_priv(dev);
1399 list_del(&geneve->next);
1400 unregister_netdevice_queue(dev, head);
1403 static size_t geneve_get_size(const struct net_device *dev)
1405 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
1406 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
1407 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
1408 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
1409 nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */
1410 nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
1411 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
1412 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */
1413 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
1414 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
1418 static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1420 struct geneve_dev *geneve = netdev_priv(dev);
1423 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
1424 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1425 goto nla_put_failure;
1427 if (geneve->remote.sa.sa_family == AF_INET) {
1428 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1429 geneve->remote.sin.sin_addr.s_addr))
1430 goto nla_put_failure;
1431 #if IS_ENABLED(CONFIG_IPV6)
1433 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1434 &geneve->remote.sin6.sin6_addr))
1435 goto nla_put_failure;
1439 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
1440 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) ||
1441 nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label))
1442 goto nla_put_failure;
1444 if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port))
1445 goto nla_put_failure;
1447 if (geneve->collect_md) {
1448 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1449 goto nla_put_failure;
1452 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
1453 !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) ||
1454 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1455 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) ||
1456 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1457 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)))
1458 goto nla_put_failure;
1466 static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1468 .maxtype = IFLA_GENEVE_MAX,
1469 .policy = geneve_policy,
1470 .priv_size = sizeof(struct geneve_dev),
1471 .setup = geneve_setup,
1472 .validate = geneve_validate,
1473 .newlink = geneve_newlink,
1474 .dellink = geneve_dellink,
1475 .get_size = geneve_get_size,
1476 .fill_info = geneve_fill_info,
1479 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1480 u8 name_assign_type, u16 dst_port)
1482 struct nlattr *tb[IFLA_MAX + 1];
1483 struct net_device *dev;
1484 LIST_HEAD(list_kill);
1487 memset(tb, 0, sizeof(tb));
1488 dev = rtnl_create_link(net, name, name_assign_type,
1489 &geneve_link_ops, tb);
1493 err = geneve_configure(net, dev, &geneve_remote_unspec,
1494 0, 0, 0, 0, htons(dst_port), true,
1495 GENEVE_F_UDP_ZERO_CSUM6_RX);
1498 return ERR_PTR(err);
1501 /* openvswitch users expect packet sizes to be unrestricted,
1502 * so set the largest MTU we can.
1504 err = geneve_change_mtu(dev, IP_MAX_MTU);
1508 err = rtnl_configure_link(dev, NULL);
1515 geneve_dellink(dev, &list_kill);
1516 unregister_netdevice_many(&list_kill);
1517 return ERR_PTR(err);
1519 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1521 static int geneve_netdevice_event(struct notifier_block *unused,
1522 unsigned long event, void *ptr)
1524 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1526 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
1527 geneve_push_rx_ports(dev);
1532 static struct notifier_block geneve_notifier_block __read_mostly = {
1533 .notifier_call = geneve_netdevice_event,
1536 static __net_init int geneve_init_net(struct net *net)
1538 struct geneve_net *gn = net_generic(net, geneve_net_id);
1540 INIT_LIST_HEAD(&gn->geneve_list);
1541 INIT_LIST_HEAD(&gn->sock_list);
1545 static void __net_exit geneve_exit_net(struct net *net)
1547 struct geneve_net *gn = net_generic(net, geneve_net_id);
1548 struct geneve_dev *geneve, *next;
1549 struct net_device *dev, *aux;
1554 /* gather any geneve devices that were moved into this ns */
1555 for_each_netdev_safe(net, dev, aux)
1556 if (dev->rtnl_link_ops == &geneve_link_ops)
1557 unregister_netdevice_queue(dev, &list);
1559 /* now gather any other geneve devices that were created in this ns */
1560 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1561 /* If geneve->dev is in the same netns, it was already added
1562 * to the list by the previous loop.
1564 if (!net_eq(dev_net(geneve->dev), net))
1565 unregister_netdevice_queue(geneve->dev, &list);
1568 /* unregister the devices gathered above */
1569 unregister_netdevice_many(&list);
1573 static struct pernet_operations geneve_net_ops = {
1574 .init = geneve_init_net,
1575 .exit = geneve_exit_net,
1576 .id = &geneve_net_id,
1577 .size = sizeof(struct geneve_net),
1580 static int __init geneve_init_module(void)
1584 rc = register_pernet_subsys(&geneve_net_ops);
1588 rc = register_netdevice_notifier(&geneve_notifier_block);
1592 rc = rtnl_link_register(&geneve_link_ops);
1599 unregister_netdevice_notifier(&geneve_notifier_block);
1601 unregister_pernet_subsys(&geneve_net_ops);
1605 late_initcall(geneve_init_module);
1607 static void __exit geneve_cleanup_module(void)
1609 rtnl_link_unregister(&geneve_link_ops);
1610 unregister_netdevice_notifier(&geneve_notifier_block);
1611 unregister_pernet_subsys(&geneve_net_ops);
1613 module_exit(geneve_cleanup_module);
1615 MODULE_LICENSE("GPL");
1616 MODULE_VERSION(GENEVE_NETDEV_VER);
1617 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1618 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1619 MODULE_ALIAS_RTNL_LINK("geneve");