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;
216 if (ip_tunnel_collect_metadata() || gs->collect_md) {
219 flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
220 (gnvh->oam ? TUNNEL_OAM : 0) |
221 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
223 tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
224 vni_to_tunnel_id(gnvh->vni),
227 geneve->dev->stats.rx_dropped++;
230 /* Update tunnel dst according to Geneve options. */
231 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
232 gnvh->options, gnvh->opt_len * 4);
234 /* Drop packets w/ critical options,
235 * since we don't support any...
237 if (gnvh->critical) {
238 geneve->dev->stats.rx_frame_errors++;
239 geneve->dev->stats.rx_errors++;
244 skb_reset_mac_header(skb);
245 skb->protocol = eth_type_trans(skb, geneve->dev);
246 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
249 skb_dst_set(skb, &tun_dst->dst);
251 /* Ignore packet loops (and multicast echo) */
252 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) {
253 geneve->dev->stats.rx_errors++;
257 oiph = skb_network_header(skb);
258 skb_reset_network_header(skb);
260 if (geneve_get_sk_family(gs) == AF_INET)
261 err = IP_ECN_decapsulate(oiph, skb);
262 #if IS_ENABLED(CONFIG_IPV6)
264 err = IP6_ECN_decapsulate(oiph, skb);
269 if (geneve_get_sk_family(gs) == AF_INET)
270 net_info_ratelimited("non-ECT from %pI4 "
272 &((struct iphdr *)oiph)->saddr,
273 ((struct iphdr *)oiph)->tos);
274 #if IS_ENABLED(CONFIG_IPV6)
276 net_info_ratelimited("non-ECT from %pI6\n",
277 &((struct ipv6hdr *)oiph)->saddr);
281 ++geneve->dev->stats.rx_frame_errors;
282 ++geneve->dev->stats.rx_errors;
288 err = gro_cells_receive(&geneve->gro_cells, skb);
289 if (likely(err == NET_RX_SUCCESS)) {
290 stats = this_cpu_ptr(geneve->dev->tstats);
291 u64_stats_update_begin(&stats->syncp);
293 stats->rx_bytes += len;
294 u64_stats_update_end(&stats->syncp);
298 /* Consume bad packet */
302 /* Setup stats when device is created */
303 static int geneve_init(struct net_device *dev)
305 struct geneve_dev *geneve = netdev_priv(dev);
308 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
312 err = gro_cells_init(&geneve->gro_cells, dev);
314 free_percpu(dev->tstats);
318 err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL);
320 free_percpu(dev->tstats);
321 gro_cells_destroy(&geneve->gro_cells);
328 static void geneve_uninit(struct net_device *dev)
330 struct geneve_dev *geneve = netdev_priv(dev);
332 dst_cache_destroy(&geneve->dst_cache);
333 gro_cells_destroy(&geneve->gro_cells);
334 free_percpu(dev->tstats);
337 /* Callback from net/ipv4/udp.c to receive packets */
338 static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
340 struct genevehdr *geneveh;
341 struct geneve_dev *geneve;
342 struct geneve_sock *gs;
345 /* Need UDP and Geneve header to be present */
346 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
349 /* Return packets with reserved bits set */
350 geneveh = geneve_hdr(skb);
351 if (unlikely(geneveh->ver != GENEVE_VER))
354 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
357 gs = rcu_dereference_sk_user_data(sk);
361 geneve = geneve_lookup_skb(gs, skb);
365 opts_len = geneveh->opt_len * 4;
366 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
368 !net_eq(geneve->net, dev_net(geneve->dev)))) {
369 geneve->dev->stats.rx_dropped++;
373 geneve_rx(geneve, gs, skb);
377 /* Consume bad packet */
382 static struct socket *geneve_create_sock(struct net *net, bool ipv6,
383 __be16 port, u32 flags)
386 struct udp_port_cfg udp_conf;
389 memset(&udp_conf, 0, sizeof(udp_conf));
392 udp_conf.family = AF_INET6;
393 udp_conf.ipv6_v6only = 1;
394 udp_conf.use_udp6_rx_checksums =
395 !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX);
397 udp_conf.family = AF_INET;
398 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
401 udp_conf.local_udp_port = port;
403 /* Open UDP socket */
404 err = udp_sock_create(net, &udp_conf, &sock);
411 static int geneve_hlen(struct genevehdr *gh)
413 return sizeof(*gh) + gh->opt_len * 4;
416 static struct sk_buff **geneve_gro_receive(struct sock *sk,
417 struct sk_buff **head,
420 struct sk_buff *p, **pp = NULL;
421 struct genevehdr *gh, *gh2;
422 unsigned int hlen, gh_len, off_gnv;
423 const struct packet_offload *ptype;
427 off_gnv = skb_gro_offset(skb);
428 hlen = off_gnv + sizeof(*gh);
429 gh = skb_gro_header_fast(skb, off_gnv);
430 if (skb_gro_header_hard(skb, hlen)) {
431 gh = skb_gro_header_slow(skb, hlen, off_gnv);
436 if (gh->ver != GENEVE_VER || gh->oam)
438 gh_len = geneve_hlen(gh);
440 hlen = off_gnv + gh_len;
441 if (skb_gro_header_hard(skb, hlen)) {
442 gh = skb_gro_header_slow(skb, hlen, off_gnv);
447 for (p = *head; p; p = p->next) {
448 if (!NAPI_GRO_CB(p)->same_flow)
451 gh2 = (struct genevehdr *)(p->data + off_gnv);
452 if (gh->opt_len != gh2->opt_len ||
453 memcmp(gh, gh2, gh_len)) {
454 NAPI_GRO_CB(p)->same_flow = 0;
459 type = gh->proto_type;
462 ptype = gro_find_receive_by_type(type);
466 skb_gro_pull(skb, gh_len);
467 skb_gro_postpull_rcsum(skb, gh, gh_len);
468 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
474 NAPI_GRO_CB(skb)->flush |= flush;
479 static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb,
482 struct genevehdr *gh;
483 struct packet_offload *ptype;
488 gh = (struct genevehdr *)(skb->data + nhoff);
489 gh_len = geneve_hlen(gh);
490 type = gh->proto_type;
493 ptype = gro_find_complete_by_type(type);
495 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
499 skb_set_inner_mac_header(skb, nhoff + gh_len);
504 /* Create new listen socket if needed */
505 static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
506 bool ipv6, u32 flags)
508 struct geneve_net *gn = net_generic(net, geneve_net_id);
509 struct geneve_sock *gs;
511 struct udp_tunnel_sock_cfg tunnel_cfg;
514 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
516 return ERR_PTR(-ENOMEM);
518 sock = geneve_create_sock(net, ipv6, port, flags);
521 return ERR_CAST(sock);
526 for (h = 0; h < VNI_HASH_SIZE; ++h)
527 INIT_HLIST_HEAD(&gs->vni_list[h]);
529 /* Initialize the geneve udp offloads structure */
530 udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
532 /* Mark socket as an encapsulation socket */
533 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
534 tunnel_cfg.sk_user_data = gs;
535 tunnel_cfg.encap_type = 1;
536 tunnel_cfg.gro_receive = geneve_gro_receive;
537 tunnel_cfg.gro_complete = geneve_gro_complete;
538 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
539 tunnel_cfg.encap_destroy = NULL;
540 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
541 list_add(&gs->list, &gn->sock_list);
545 static void __geneve_sock_release(struct geneve_sock *gs)
547 if (!gs || --gs->refcnt)
551 udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
552 udp_tunnel_sock_release(gs->sock);
556 static void geneve_sock_release(struct geneve_dev *geneve)
558 struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4);
559 #if IS_ENABLED(CONFIG_IPV6)
560 struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6);
562 rcu_assign_pointer(geneve->sock6, NULL);
565 rcu_assign_pointer(geneve->sock4, NULL);
568 __geneve_sock_release(gs4);
569 #if IS_ENABLED(CONFIG_IPV6)
570 __geneve_sock_release(gs6);
574 static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
578 struct geneve_sock *gs;
580 list_for_each_entry(gs, &gn->sock_list, list) {
581 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
582 geneve_get_sk_family(gs) == family) {
589 static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
591 struct net *net = geneve->net;
592 struct geneve_net *gn = net_generic(net, geneve_net_id);
593 struct geneve_sock *gs;
596 gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port);
602 gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags);
607 gs->collect_md = geneve->collect_md;
608 gs->flags = geneve->flags;
609 #if IS_ENABLED(CONFIG_IPV6)
611 rcu_assign_pointer(geneve->sock6, gs);
614 rcu_assign_pointer(geneve->sock4, gs);
616 hash = geneve_net_vni_hash(geneve->vni);
617 hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
621 static int geneve_open(struct net_device *dev)
623 struct geneve_dev *geneve = netdev_priv(dev);
624 bool ipv6 = geneve->remote.sa.sa_family == AF_INET6;
625 bool metadata = geneve->collect_md;
628 #if IS_ENABLED(CONFIG_IPV6)
629 if (ipv6 || metadata)
630 ret = geneve_sock_add(geneve, true);
632 if (!ret && (!ipv6 || metadata))
633 ret = geneve_sock_add(geneve, false);
635 geneve_sock_release(geneve);
640 static int geneve_stop(struct net_device *dev)
642 struct geneve_dev *geneve = netdev_priv(dev);
644 if (!hlist_unhashed(&geneve->hlist))
645 hlist_del_rcu(&geneve->hlist);
646 geneve_sock_release(geneve);
650 static void geneve_build_header(struct genevehdr *geneveh,
651 __be16 tun_flags, u8 vni[3],
652 u8 options_len, u8 *options)
654 geneveh->ver = GENEVE_VER;
655 geneveh->opt_len = options_len / 4;
656 geneveh->oam = !!(tun_flags & TUNNEL_OAM);
657 geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
659 memcpy(geneveh->vni, vni, 3);
660 geneveh->proto_type = htons(ETH_P_TEB);
663 memcpy(geneveh->options, options, options_len);
666 static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
667 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
668 u32 flags, bool xnet)
670 struct genevehdr *gnvh;
673 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX);
675 skb_scrub_packet(skb, xnet);
677 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
678 + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr);
679 err = skb_cow_head(skb, min_headroom);
683 err = udp_tunnel_handle_offloads(skb, udp_sum);
687 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
688 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
690 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
698 #if IS_ENABLED(CONFIG_IPV6)
699 static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb,
700 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
701 u32 flags, bool xnet)
703 struct genevehdr *gnvh;
706 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX);
708 skb_scrub_packet(skb, xnet);
710 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
711 + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr);
712 err = skb_cow_head(skb, min_headroom);
716 err = udp_tunnel_handle_offloads(skb, udp_sum);
720 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
721 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
723 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
732 static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
733 struct net_device *dev,
735 struct ip_tunnel_info *info,
736 __be16 dport, __be16 sport)
738 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
739 struct geneve_dev *geneve = netdev_priv(dev);
740 struct dst_cache *dst_cache;
741 struct rtable *rt = NULL;
744 if (!rcu_dereference(geneve->sock4))
745 return ERR_PTR(-EIO);
747 memset(fl4, 0, sizeof(*fl4));
748 fl4->flowi4_mark = skb->mark;
749 fl4->flowi4_proto = IPPROTO_UDP;
750 fl4->fl4_dport = dport;
751 fl4->fl4_sport = sport;
754 fl4->daddr = info->key.u.ipv4.dst;
755 fl4->saddr = info->key.u.ipv4.src;
756 fl4->flowi4_tos = RT_TOS(info->key.tos);
757 dst_cache = &info->dst_cache;
761 const struct iphdr *iip = ip_hdr(skb);
763 tos = ip_tunnel_get_dsfield(iip, skb);
767 fl4->flowi4_tos = RT_TOS(tos);
768 fl4->daddr = geneve->remote.sin.sin_addr.s_addr;
769 dst_cache = &geneve->dst_cache;
773 rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
778 rt = ip_route_output_key(geneve->net, fl4);
780 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
781 return ERR_PTR(-ENETUNREACH);
783 if (rt->dst.dev == dev) { /* is this necessary? */
784 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
786 return ERR_PTR(-ELOOP);
789 dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
793 #if IS_ENABLED(CONFIG_IPV6)
794 static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
795 struct net_device *dev,
797 struct ip_tunnel_info *info,
798 __be16 dport, __be16 sport)
800 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
801 struct geneve_dev *geneve = netdev_priv(dev);
802 struct dst_entry *dst = NULL;
803 struct dst_cache *dst_cache;
804 struct geneve_sock *gs6;
807 gs6 = rcu_dereference(geneve->sock6);
809 return ERR_PTR(-EIO);
811 memset(fl6, 0, sizeof(*fl6));
812 fl6->flowi6_mark = skb->mark;
813 fl6->flowi6_proto = IPPROTO_UDP;
814 fl6->fl6_dport = dport;
815 fl6->fl6_sport = sport;
818 fl6->daddr = info->key.u.ipv6.dst;
819 fl6->saddr = info->key.u.ipv6.src;
820 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos),
822 dst_cache = &info->dst_cache;
826 const struct iphdr *iip = ip_hdr(skb);
828 prio = ip_tunnel_get_dsfield(iip, skb);
832 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
834 fl6->daddr = geneve->remote.sin6.sin6_addr;
835 dst_cache = &geneve->dst_cache;
839 dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
844 dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6,
847 netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr);
848 return ERR_PTR(-ENETUNREACH);
850 if (dst->dev == dev) { /* is this necessary? */
851 netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr);
853 return ERR_PTR(-ELOOP);
857 dst_cache_set_ip6(dst_cache, dst, &fl6->saddr);
862 /* Convert 64 bit tunnel ID to 24 bit VNI. */
863 static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
866 vni[0] = (__force __u8)(tun_id >> 16);
867 vni[1] = (__force __u8)(tun_id >> 8);
868 vni[2] = (__force __u8)tun_id;
870 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
871 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
872 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
876 static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
877 struct ip_tunnel_info *info)
879 struct geneve_dev *geneve = netdev_priv(dev);
880 struct geneve_sock *gs4;
881 struct rtable *rt = NULL;
887 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
888 u32 flags = geneve->flags;
890 gs4 = rcu_dereference(geneve->sock4);
894 if (geneve->collect_md) {
895 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
896 netdev_dbg(dev, "no tunnel metadata\n");
899 if (info && ip_tunnel_info_af(info) != AF_INET)
903 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
904 rt = geneve_get_v4_rt(skb, dev, &fl4, info,
905 geneve->dst_port, sport);
911 skb_reset_mac_header(skb);
914 const struct ip_tunnel_key *key = &info->key;
918 tunnel_id_to_vni(key->tun_id, vni);
919 if (info->options_len)
920 opts = ip_tunnel_info_opts(info);
922 if (key->tun_flags & TUNNEL_CSUM)
923 flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX;
925 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
927 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
928 info->options_len, opts, flags, xnet);
932 tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
934 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
936 err = geneve_build_skb(rt, skb, 0, geneve->vni,
937 0, NULL, flags, xnet);
941 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
943 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
945 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
948 udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
949 tos, ttl, df, sport, geneve->dst_port,
950 !net_eq(geneve->net, dev_net(geneve->dev)),
951 !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX));
959 dev->stats.collisions++;
960 else if (err == -ENETUNREACH)
961 dev->stats.tx_carrier_errors++;
963 dev->stats.tx_errors++;
967 #if IS_ENABLED(CONFIG_IPV6)
968 static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
969 struct ip_tunnel_info *info)
971 struct geneve_dev *geneve = netdev_priv(dev);
972 struct dst_entry *dst = NULL;
973 struct geneve_sock *gs6;
979 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
980 u32 flags = geneve->flags;
982 gs6 = rcu_dereference(geneve->sock6);
986 if (geneve->collect_md) {
987 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
988 netdev_dbg(dev, "no tunnel metadata\n");
993 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
994 dst = geneve_get_v6_dst(skb, dev, &fl6, info,
995 geneve->dst_port, sport);
1001 skb_reset_mac_header(skb);
1004 const struct ip_tunnel_key *key = &info->key;
1008 tunnel_id_to_vni(key->tun_id, vni);
1009 if (info->options_len)
1010 opts = ip_tunnel_info_opts(info);
1012 if (key->tun_flags & TUNNEL_CSUM)
1013 flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX;
1015 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1017 err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
1018 info->options_len, opts,
1023 prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
1025 label = info->key.label;
1027 err = geneve6_build_skb(dst, skb, 0, geneve->vni,
1028 0, NULL, flags, xnet);
1032 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1035 if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
1037 ttl = ttl ? : ip6_dst_hoplimit(dst);
1038 label = geneve->label;
1041 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
1042 &fl6.saddr, &fl6.daddr, prio, ttl, label,
1043 sport, geneve->dst_port,
1044 !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
1045 return NETDEV_TX_OK;
1051 dev->stats.collisions++;
1052 else if (err == -ENETUNREACH)
1053 dev->stats.tx_carrier_errors++;
1055 dev->stats.tx_errors++;
1056 return NETDEV_TX_OK;
1060 static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1062 struct geneve_dev *geneve = netdev_priv(dev);
1063 struct ip_tunnel_info *info = NULL;
1066 if (geneve->collect_md)
1067 info = skb_tunnel_info(skb);
1070 #if IS_ENABLED(CONFIG_IPV6)
1071 if ((info && ip_tunnel_info_af(info) == AF_INET6) ||
1072 (!info && geneve->remote.sa.sa_family == AF_INET6))
1073 err = geneve6_xmit_skb(skb, dev, info);
1076 err = geneve_xmit_skb(skb, dev, info);
1082 static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict)
1084 struct geneve_dev *geneve = netdev_priv(dev);
1085 /* The max_mtu calculation does not take account of GENEVE
1086 * options, to avoid excluding potentially valid
1089 int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1091 if (geneve->remote.sa.sa_family == AF_INET6)
1092 max_mtu -= sizeof(struct ipv6hdr);
1094 max_mtu -= sizeof(struct iphdr);
1099 if (new_mtu > max_mtu) {
1110 static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1112 return __geneve_change_mtu(dev, new_mtu, true);
1115 static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1117 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1118 struct geneve_dev *geneve = netdev_priv(dev);
1121 #if IS_ENABLED(CONFIG_IPV6)
1122 struct dst_entry *dst;
1127 if (ip_tunnel_info_af(info) == AF_INET) {
1128 sport = udp_flow_src_port(geneve->net, skb,
1129 1, USHRT_MAX, true);
1131 rt = geneve_get_v4_rt(skb, dev, &fl4, info,
1132 geneve->dst_port, sport);
1137 info->key.u.ipv4.src = fl4.saddr;
1138 #if IS_ENABLED(CONFIG_IPV6)
1139 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1140 sport = udp_flow_src_port(geneve->net, skb,
1141 1, USHRT_MAX, true);
1143 dst = geneve_get_v6_dst(skb, dev, &fl6, info,
1144 geneve->dst_port, sport);
1146 return PTR_ERR(dst);
1149 info->key.u.ipv6.src = fl6.saddr;
1155 info->key.tp_src = sport;
1156 info->key.tp_dst = geneve->dst_port;
1160 static const struct net_device_ops geneve_netdev_ops = {
1161 .ndo_init = geneve_init,
1162 .ndo_uninit = geneve_uninit,
1163 .ndo_open = geneve_open,
1164 .ndo_stop = geneve_stop,
1165 .ndo_start_xmit = geneve_xmit,
1166 .ndo_get_stats64 = ip_tunnel_get_stats64,
1167 .ndo_change_mtu = geneve_change_mtu,
1168 .ndo_validate_addr = eth_validate_addr,
1169 .ndo_set_mac_address = eth_mac_addr,
1170 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
1173 static void geneve_get_drvinfo(struct net_device *dev,
1174 struct ethtool_drvinfo *drvinfo)
1176 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1177 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1180 static const struct ethtool_ops geneve_ethtool_ops = {
1181 .get_drvinfo = geneve_get_drvinfo,
1182 .get_link = ethtool_op_get_link,
1185 /* Info for udev, that this is a virtual tunnel endpoint */
1186 static struct device_type geneve_type = {
1190 /* Calls the ndo_udp_tunnel_add of the caller in order to
1191 * supply the listening GENEVE udp ports. Callers are expected
1192 * to implement the ndo_udp_tunnel_add.
1194 static void geneve_push_rx_ports(struct net_device *dev)
1196 struct net *net = dev_net(dev);
1197 struct geneve_net *gn = net_generic(net, geneve_net_id);
1198 struct geneve_sock *gs;
1201 list_for_each_entry_rcu(gs, &gn->sock_list, list)
1202 udp_tunnel_push_rx_port(dev, gs->sock,
1203 UDP_TUNNEL_TYPE_GENEVE);
1207 /* Initialize the device structure. */
1208 static void geneve_setup(struct net_device *dev)
1212 dev->netdev_ops = &geneve_netdev_ops;
1213 dev->ethtool_ops = &geneve_ethtool_ops;
1214 dev->destructor = free_netdev;
1216 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1218 dev->features |= NETIF_F_LLTX;
1219 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1220 dev->features |= NETIF_F_RXCSUM;
1221 dev->features |= NETIF_F_GSO_SOFTWARE;
1223 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1224 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1226 netif_keep_dst(dev);
1227 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1228 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
1229 eth_hw_addr_random(dev);
1232 static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1233 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1234 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
1235 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
1236 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
1237 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
1238 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
1239 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
1240 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
1241 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1242 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1243 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
1246 static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
1248 if (tb[IFLA_ADDRESS]) {
1249 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1252 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1253 return -EADDRNOTAVAIL;
1259 if (data[IFLA_GENEVE_ID]) {
1260 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1262 if (vni >= GENEVE_VID_MASK)
1269 static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1271 union geneve_addr *remote,
1273 bool *tun_on_same_port,
1274 bool *tun_collect_md)
1276 struct geneve_dev *geneve, *t;
1278 *tun_on_same_port = false;
1279 *tun_collect_md = false;
1281 list_for_each_entry(geneve, &gn->geneve_list, next) {
1282 if (geneve->dst_port == dst_port) {
1283 *tun_collect_md = geneve->collect_md;
1284 *tun_on_same_port = true;
1286 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
1287 !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
1288 dst_port == geneve->dst_port)
1294 static int geneve_configure(struct net *net, struct net_device *dev,
1295 union geneve_addr *remote,
1296 __u32 vni, __u8 ttl, __u8 tos, __be32 label,
1297 __be16 dst_port, bool metadata, u32 flags)
1299 struct geneve_net *gn = net_generic(net, geneve_net_id);
1300 struct geneve_dev *t, *geneve = netdev_priv(dev);
1301 bool tun_collect_md, tun_on_same_port;
1307 (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label))
1313 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
1314 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
1315 geneve->vni[2] = vni & 0x000000ff;
1317 if ((remote->sa.sa_family == AF_INET &&
1318 IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) ||
1319 (remote->sa.sa_family == AF_INET6 &&
1320 ipv6_addr_is_multicast(&remote->sin6.sin6_addr)))
1322 if (label && remote->sa.sa_family != AF_INET6)
1325 geneve->remote = *remote;
1329 geneve->label = label;
1330 geneve->dst_port = dst_port;
1331 geneve->collect_md = metadata;
1332 geneve->flags = flags;
1334 t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
1335 &tun_on_same_port, &tun_collect_md);
1339 /* make enough headroom for basic scenario */
1340 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1341 if (remote->sa.sa_family == AF_INET)
1342 encap_len += sizeof(struct iphdr);
1344 encap_len += sizeof(struct ipv6hdr);
1345 dev->needed_headroom = encap_len + ETH_HLEN;
1348 if (tun_on_same_port)
1355 dst_cache_reset(&geneve->dst_cache);
1357 err = register_netdevice(dev);
1361 list_add(&geneve->next, &gn->geneve_list);
1365 static int geneve_newlink(struct net *net, struct net_device *dev,
1366 struct nlattr *tb[], struct nlattr *data[])
1368 __be16 dst_port = htons(GENEVE_UDP_PORT);
1369 __u8 ttl = 0, tos = 0;
1370 bool metadata = false;
1371 union geneve_addr remote = geneve_remote_unspec;
1376 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6])
1379 if (data[IFLA_GENEVE_REMOTE]) {
1380 remote.sa.sa_family = AF_INET;
1381 remote.sin.sin_addr.s_addr =
1382 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1385 if (data[IFLA_GENEVE_REMOTE6]) {
1386 if (!IS_ENABLED(CONFIG_IPV6))
1387 return -EPFNOSUPPORT;
1389 remote.sa.sa_family = AF_INET6;
1390 remote.sin6.sin6_addr =
1391 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1393 if (ipv6_addr_type(&remote.sin6.sin6_addr) &
1394 IPV6_ADDR_LINKLOCAL) {
1395 netdev_dbg(dev, "link-local remote is unsupported\n");
1400 if (data[IFLA_GENEVE_ID])
1401 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1403 if (data[IFLA_GENEVE_TTL])
1404 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1406 if (data[IFLA_GENEVE_TOS])
1407 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1409 if (data[IFLA_GENEVE_LABEL])
1410 label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1411 IPV6_FLOWLABEL_MASK;
1413 if (data[IFLA_GENEVE_PORT])
1414 dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]);
1416 if (data[IFLA_GENEVE_COLLECT_METADATA])
1419 if (data[IFLA_GENEVE_UDP_CSUM] &&
1420 !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1421 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
1423 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
1424 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1425 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1427 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] &&
1428 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1429 flags |= GENEVE_F_UDP_ZERO_CSUM6_RX;
1431 return geneve_configure(net, dev, &remote, vni, ttl, tos, label,
1432 dst_port, metadata, flags);
1435 static void geneve_dellink(struct net_device *dev, struct list_head *head)
1437 struct geneve_dev *geneve = netdev_priv(dev);
1439 list_del(&geneve->next);
1440 unregister_netdevice_queue(dev, head);
1443 static size_t geneve_get_size(const struct net_device *dev)
1445 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
1446 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
1447 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
1448 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
1449 nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */
1450 nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
1451 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
1452 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */
1453 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
1454 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
1458 static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1460 struct geneve_dev *geneve = netdev_priv(dev);
1463 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
1464 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1465 goto nla_put_failure;
1467 if (geneve->remote.sa.sa_family == AF_INET) {
1468 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1469 geneve->remote.sin.sin_addr.s_addr))
1470 goto nla_put_failure;
1471 #if IS_ENABLED(CONFIG_IPV6)
1473 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1474 &geneve->remote.sin6.sin6_addr))
1475 goto nla_put_failure;
1479 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
1480 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) ||
1481 nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label))
1482 goto nla_put_failure;
1484 if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port))
1485 goto nla_put_failure;
1487 if (geneve->collect_md) {
1488 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1489 goto nla_put_failure;
1492 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
1493 !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) ||
1494 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1495 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) ||
1496 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1497 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)))
1498 goto nla_put_failure;
1506 static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1508 .maxtype = IFLA_GENEVE_MAX,
1509 .policy = geneve_policy,
1510 .priv_size = sizeof(struct geneve_dev),
1511 .setup = geneve_setup,
1512 .validate = geneve_validate,
1513 .newlink = geneve_newlink,
1514 .dellink = geneve_dellink,
1515 .get_size = geneve_get_size,
1516 .fill_info = geneve_fill_info,
1519 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1520 u8 name_assign_type, u16 dst_port)
1522 struct nlattr *tb[IFLA_MAX + 1];
1523 struct net_device *dev;
1524 LIST_HEAD(list_kill);
1527 memset(tb, 0, sizeof(tb));
1528 dev = rtnl_create_link(net, name, name_assign_type,
1529 &geneve_link_ops, tb);
1533 err = geneve_configure(net, dev, &geneve_remote_unspec,
1534 0, 0, 0, 0, htons(dst_port), true,
1535 GENEVE_F_UDP_ZERO_CSUM6_RX);
1538 return ERR_PTR(err);
1541 /* openvswitch users expect packet sizes to be unrestricted,
1542 * so set the largest MTU we can.
1544 err = __geneve_change_mtu(dev, IP_MAX_MTU, false);
1548 err = rtnl_configure_link(dev, NULL);
1555 geneve_dellink(dev, &list_kill);
1556 unregister_netdevice_many(&list_kill);
1557 return ERR_PTR(err);
1559 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1561 static int geneve_netdevice_event(struct notifier_block *unused,
1562 unsigned long event, void *ptr)
1564 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1566 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
1567 geneve_push_rx_ports(dev);
1572 static struct notifier_block geneve_notifier_block __read_mostly = {
1573 .notifier_call = geneve_netdevice_event,
1576 static __net_init int geneve_init_net(struct net *net)
1578 struct geneve_net *gn = net_generic(net, geneve_net_id);
1580 INIT_LIST_HEAD(&gn->geneve_list);
1581 INIT_LIST_HEAD(&gn->sock_list);
1585 static void __net_exit geneve_exit_net(struct net *net)
1587 struct geneve_net *gn = net_generic(net, geneve_net_id);
1588 struct geneve_dev *geneve, *next;
1589 struct net_device *dev, *aux;
1594 /* gather any geneve devices that were moved into this ns */
1595 for_each_netdev_safe(net, dev, aux)
1596 if (dev->rtnl_link_ops == &geneve_link_ops)
1597 unregister_netdevice_queue(dev, &list);
1599 /* now gather any other geneve devices that were created in this ns */
1600 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1601 /* If geneve->dev is in the same netns, it was already added
1602 * to the list by the previous loop.
1604 if (!net_eq(dev_net(geneve->dev), net))
1605 unregister_netdevice_queue(geneve->dev, &list);
1608 /* unregister the devices gathered above */
1609 unregister_netdevice_many(&list);
1613 static struct pernet_operations geneve_net_ops = {
1614 .init = geneve_init_net,
1615 .exit = geneve_exit_net,
1616 .id = &geneve_net_id,
1617 .size = sizeof(struct geneve_net),
1620 static int __init geneve_init_module(void)
1624 rc = register_pernet_subsys(&geneve_net_ops);
1628 rc = register_netdevice_notifier(&geneve_notifier_block);
1632 rc = rtnl_link_register(&geneve_link_ops);
1639 unregister_netdevice_notifier(&geneve_notifier_block);
1641 unregister_pernet_subsys(&geneve_net_ops);
1645 late_initcall(geneve_init_module);
1647 static void __exit geneve_cleanup_module(void)
1649 rtnl_link_unregister(&geneve_link_ops);
1650 unregister_netdevice_notifier(&geneve_notifier_block);
1651 unregister_pernet_subsys(&geneve_net_ops);
1653 module_exit(geneve_cleanup_module);
1655 MODULE_LICENSE("GPL");
1656 MODULE_VERSION(GENEVE_NETDEV_VER);
1657 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1658 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1659 MODULE_ALIAS_RTNL_LINK("geneve");