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/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/hash.h>
18 #include <net/dst_metadata.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;
48 /* Pseudo network device */
50 struct hlist_node hlist; /* vni hash table */
51 struct net *net; /* netns for packet i/o */
52 struct net_device *dev; /* netdev for geneve tunnel */
53 struct geneve_sock *sock; /* socket used for geneve tunnel */
54 u8 vni[3]; /* virtual network ID for tunnel */
55 u8 ttl; /* TTL override */
56 u8 tos; /* TOS override */
57 struct sockaddr_in remote; /* IPv4 address for link partner */
58 struct list_head next; /* geneve's per namespace list */
65 struct list_head list;
69 struct udp_offload udp_offloads;
70 struct hlist_head vni_list[VNI_HASH_SIZE];
73 static inline __u32 geneve_net_vni_hash(u8 vni[3])
77 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
78 return hash_32(vnid, VNI_HASH_BITS);
81 static __be64 vni_to_tunnel_id(const __u8 *vni)
84 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
86 return (__force __be64)(((__force u64)vni[0] << 40) |
87 ((__force u64)vni[1] << 48) |
88 ((__force u64)vni[2] << 56));
92 static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
93 __be32 addr, u8 vni[])
95 struct hlist_head *vni_list_head;
96 struct geneve_dev *geneve;
99 /* Find the device for this VNI */
100 hash = geneve_net_vni_hash(vni);
101 vni_list_head = &gs->vni_list[hash];
102 hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
103 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
104 addr == geneve->remote.sin_addr.s_addr)
110 static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
112 return (struct genevehdr *)(udp_hdr(skb) + 1);
115 /* geneve receive/decap routine */
116 static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
118 struct genevehdr *gnvh = geneve_hdr(skb);
119 struct metadata_dst *tun_dst = NULL;
120 struct geneve_dev *geneve = NULL;
121 struct pcpu_sw_netstats *stats;
127 if (gs->collect_md) {
128 static u8 zero_vni[3];
134 iph = ip_hdr(skb); /* Still outer IP header... */
138 geneve = geneve_lookup(gs, addr, vni);
142 if (ip_tunnel_collect_metadata() || gs->collect_md) {
146 flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
147 (gnvh->oam ? TUNNEL_OAM : 0) |
148 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
150 tun_dst = udp_tun_rx_dst(skb, AF_INET, flags,
151 vni_to_tunnel_id(gnvh->vni),
156 /* Update tunnel dst according to Geneve options. */
157 opts = ip_tunnel_info_opts(&tun_dst->u.tun_info,
159 memcpy(opts, gnvh->options, gnvh->opt_len * 4);
161 /* Drop packets w/ critical options,
162 * since we don't support any...
168 skb_reset_mac_header(skb);
169 skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev)));
170 skb->protocol = eth_type_trans(skb, geneve->dev);
171 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
174 skb_dst_set(skb, &tun_dst->dst);
176 /* Ignore packet loops (and multicast echo) */
177 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr))
180 skb_reset_network_header(skb);
182 iph = ip_hdr(skb); /* Now inner IP header... */
183 err = IP_ECN_decapsulate(iph, skb);
187 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
188 &iph->saddr, iph->tos);
190 ++geneve->dev->stats.rx_frame_errors;
191 ++geneve->dev->stats.rx_errors;
196 stats = this_cpu_ptr(geneve->dev->tstats);
197 u64_stats_update_begin(&stats->syncp);
199 stats->rx_bytes += skb->len;
200 u64_stats_update_end(&stats->syncp);
205 /* Consume bad packet */
209 /* Setup stats when device is created */
210 static int geneve_init(struct net_device *dev)
212 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
218 static void geneve_uninit(struct net_device *dev)
220 free_percpu(dev->tstats);
223 /* Callback from net/ipv4/udp.c to receive packets */
224 static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
226 struct genevehdr *geneveh;
227 struct geneve_sock *gs;
230 /* Need Geneve and inner Ethernet header to be present */
231 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
234 /* Return packets with reserved bits set */
235 geneveh = geneve_hdr(skb);
236 if (unlikely(geneveh->ver != GENEVE_VER))
239 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
242 opts_len = geneveh->opt_len * 4;
243 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
247 gs = rcu_dereference_sk_user_data(sk);
255 /* Consume bad packet */
260 /* Let the UDP layer deal with the skb */
264 static struct socket *geneve_create_sock(struct net *net, bool ipv6,
268 struct udp_port_cfg udp_conf;
271 memset(&udp_conf, 0, sizeof(udp_conf));
274 udp_conf.family = AF_INET6;
276 udp_conf.family = AF_INET;
277 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
280 udp_conf.local_udp_port = port;
282 /* Open UDP socket */
283 err = udp_sock_create(net, &udp_conf, &sock);
290 static void geneve_notify_add_rx_port(struct geneve_sock *gs)
292 struct sock *sk = gs->sock->sk;
293 sa_family_t sa_family = sk->sk_family;
296 if (sa_family == AF_INET) {
297 err = udp_add_offload(&gs->udp_offloads);
299 pr_warn("geneve: udp_add_offload failed with status %d\n",
304 static int geneve_hlen(struct genevehdr *gh)
306 return sizeof(*gh) + gh->opt_len * 4;
309 static struct sk_buff **geneve_gro_receive(struct sk_buff **head,
311 struct udp_offload *uoff)
313 struct sk_buff *p, **pp = NULL;
314 struct genevehdr *gh, *gh2;
315 unsigned int hlen, gh_len, off_gnv;
316 const struct packet_offload *ptype;
320 off_gnv = skb_gro_offset(skb);
321 hlen = off_gnv + sizeof(*gh);
322 gh = skb_gro_header_fast(skb, off_gnv);
323 if (skb_gro_header_hard(skb, hlen)) {
324 gh = skb_gro_header_slow(skb, hlen, off_gnv);
329 if (gh->ver != GENEVE_VER || gh->oam)
331 gh_len = geneve_hlen(gh);
333 hlen = off_gnv + gh_len;
334 if (skb_gro_header_hard(skb, hlen)) {
335 gh = skb_gro_header_slow(skb, hlen, off_gnv);
342 for (p = *head; p; p = p->next) {
343 if (!NAPI_GRO_CB(p)->same_flow)
346 gh2 = (struct genevehdr *)(p->data + off_gnv);
347 if (gh->opt_len != gh2->opt_len ||
348 memcmp(gh, gh2, gh_len)) {
349 NAPI_GRO_CB(p)->same_flow = 0;
354 type = gh->proto_type;
357 ptype = gro_find_receive_by_type(type);
363 skb_gro_pull(skb, gh_len);
364 skb_gro_postpull_rcsum(skb, gh, gh_len);
365 pp = ptype->callbacks.gro_receive(head, skb);
370 NAPI_GRO_CB(skb)->flush |= flush;
375 static int geneve_gro_complete(struct sk_buff *skb, int nhoff,
376 struct udp_offload *uoff)
378 struct genevehdr *gh;
379 struct packet_offload *ptype;
384 udp_tunnel_gro_complete(skb, nhoff);
386 gh = (struct genevehdr *)(skb->data + nhoff);
387 gh_len = geneve_hlen(gh);
388 type = gh->proto_type;
391 ptype = gro_find_complete_by_type(type);
393 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
399 /* Create new listen socket if needed */
400 static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
403 struct geneve_net *gn = net_generic(net, geneve_net_id);
404 struct geneve_sock *gs;
406 struct udp_tunnel_sock_cfg tunnel_cfg;
409 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
411 return ERR_PTR(-ENOMEM);
413 sock = geneve_create_sock(net, ipv6, port);
416 return ERR_CAST(sock);
421 for (h = 0; h < VNI_HASH_SIZE; ++h)
422 INIT_HLIST_HEAD(&gs->vni_list[h]);
424 /* Initialize the geneve udp offloads structure */
425 gs->udp_offloads.port = port;
426 gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive;
427 gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete;
428 geneve_notify_add_rx_port(gs);
430 /* Mark socket as an encapsulation socket */
431 tunnel_cfg.sk_user_data = gs;
432 tunnel_cfg.encap_type = 1;
433 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
434 tunnel_cfg.encap_destroy = NULL;
435 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
436 list_add(&gs->list, &gn->sock_list);
440 static void geneve_notify_del_rx_port(struct geneve_sock *gs)
442 struct sock *sk = gs->sock->sk;
443 sa_family_t sa_family = sk->sk_family;
445 if (sa_family == AF_INET)
446 udp_del_offload(&gs->udp_offloads);
449 static void geneve_sock_release(struct geneve_sock *gs)
455 geneve_notify_del_rx_port(gs);
456 udp_tunnel_sock_release(gs->sock);
460 static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
463 struct geneve_sock *gs;
465 list_for_each_entry(gs, &gn->sock_list, list) {
466 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
467 inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) {
474 static int geneve_open(struct net_device *dev)
476 struct geneve_dev *geneve = netdev_priv(dev);
477 struct net *net = geneve->net;
478 struct geneve_net *gn = net_generic(net, geneve_net_id);
479 struct geneve_sock *gs;
482 gs = geneve_find_sock(gn, geneve->dst_port);
488 gs = geneve_socket_create(net, geneve->dst_port, false);
493 gs->collect_md = geneve->collect_md;
496 hash = geneve_net_vni_hash(geneve->vni);
497 hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
501 static int geneve_stop(struct net_device *dev)
503 struct geneve_dev *geneve = netdev_priv(dev);
504 struct geneve_sock *gs = geneve->sock;
506 if (!hlist_unhashed(&geneve->hlist))
507 hlist_del_rcu(&geneve->hlist);
508 geneve_sock_release(gs);
512 static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
513 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
516 struct genevehdr *gnvh;
520 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
521 + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr);
522 err = skb_cow_head(skb, min_headroom);
528 skb = udp_tunnel_handle_offloads(skb, csum);
534 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
535 gnvh->ver = GENEVE_VER;
536 gnvh->opt_len = opt_len / 4;
537 gnvh->oam = !!(tun_flags & TUNNEL_OAM);
538 gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
540 memcpy(gnvh->vni, vni, 3);
541 gnvh->proto_type = htons(ETH_P_TEB);
543 memcpy(gnvh->options, opt, opt_len);
545 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
553 static struct rtable *geneve_get_rt(struct sk_buff *skb,
554 struct net_device *dev,
556 struct ip_tunnel_info *info)
558 struct geneve_dev *geneve = netdev_priv(dev);
559 struct rtable *rt = NULL;
562 memset(fl4, 0, sizeof(*fl4));
563 fl4->flowi4_mark = skb->mark;
564 fl4->flowi4_proto = IPPROTO_UDP;
567 fl4->daddr = info->key.u.ipv4.dst;
568 fl4->saddr = info->key.u.ipv4.src;
569 fl4->flowi4_tos = RT_TOS(info->key.tos);
573 const struct iphdr *iip = ip_hdr(skb);
575 tos = ip_tunnel_get_dsfield(iip, skb);
578 fl4->flowi4_tos = RT_TOS(tos);
579 fl4->daddr = geneve->remote.sin_addr.s_addr;
582 rt = ip_route_output_key(geneve->net, fl4);
584 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
585 dev->stats.tx_carrier_errors++;
588 if (rt->dst.dev == dev) { /* is this necessary? */
589 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
590 dev->stats.collisions++;
592 return ERR_PTR(-EINVAL);
597 /* Convert 64 bit tunnel ID to 24 bit VNI. */
598 static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
601 vni[0] = (__force __u8)(tun_id >> 16);
602 vni[1] = (__force __u8)(tun_id >> 8);
603 vni[2] = (__force __u8)tun_id;
605 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
606 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
607 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
611 static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
613 struct geneve_dev *geneve = netdev_priv(dev);
614 struct geneve_sock *gs = geneve->sock;
615 struct ip_tunnel_info *info = NULL;
616 struct rtable *rt = NULL;
624 if (geneve->collect_md) {
625 info = skb_tunnel_info(skb);
626 if (unlikely(info && info->mode != IP_TUNNEL_INFO_TX)) {
627 netdev_dbg(dev, "no tunnel metadata\n");
632 rt = geneve_get_rt(skb, dev, &fl4, info);
634 netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr);
635 dev->stats.tx_carrier_errors++;
639 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
640 skb_reset_mac_header(skb);
643 const struct ip_tunnel_key *key = &info->key;
647 tunnel_id_to_vni(key->tun_id, vni);
648 if (key->tun_flags & TUNNEL_GENEVE_OPT)
649 opts = ip_tunnel_info_opts(info, info->options_len);
651 udp_csum = !!(key->tun_flags & TUNNEL_CSUM);
652 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
653 info->options_len, opts, udp_csum);
659 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
661 const struct iphdr *iip; /* interior IP header */
664 err = geneve_build_skb(rt, skb, 0, geneve->vni,
670 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb);
672 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
674 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
677 err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr,
678 tos, ttl, df, sport, geneve->dst_port,
679 !net_eq(geneve->net, dev_net(geneve->dev)),
682 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
688 dev->stats.tx_errors++;
692 static const struct net_device_ops geneve_netdev_ops = {
693 .ndo_init = geneve_init,
694 .ndo_uninit = geneve_uninit,
695 .ndo_open = geneve_open,
696 .ndo_stop = geneve_stop,
697 .ndo_start_xmit = geneve_xmit,
698 .ndo_get_stats64 = ip_tunnel_get_stats64,
699 .ndo_change_mtu = eth_change_mtu,
700 .ndo_validate_addr = eth_validate_addr,
701 .ndo_set_mac_address = eth_mac_addr,
704 static void geneve_get_drvinfo(struct net_device *dev,
705 struct ethtool_drvinfo *drvinfo)
707 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
708 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
711 static const struct ethtool_ops geneve_ethtool_ops = {
712 .get_drvinfo = geneve_get_drvinfo,
713 .get_link = ethtool_op_get_link,
716 /* Info for udev, that this is a virtual tunnel endpoint */
717 static struct device_type geneve_type = {
721 /* Initialize the device structure. */
722 static void geneve_setup(struct net_device *dev)
726 dev->netdev_ops = &geneve_netdev_ops;
727 dev->ethtool_ops = &geneve_ethtool_ops;
728 dev->destructor = free_netdev;
730 SET_NETDEV_DEVTYPE(dev, &geneve_type);
732 dev->features |= NETIF_F_LLTX;
733 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
734 dev->features |= NETIF_F_RXCSUM;
735 dev->features |= NETIF_F_GSO_SOFTWARE;
737 dev->vlan_features = dev->features;
738 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
740 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
741 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
742 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
745 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
746 eth_hw_addr_random(dev);
749 static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
750 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
751 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
752 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
753 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
754 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
755 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
758 static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
760 if (tb[IFLA_ADDRESS]) {
761 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
764 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
765 return -EADDRNOTAVAIL;
771 if (data[IFLA_GENEVE_ID]) {
772 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
774 if (vni >= GENEVE_VID_MASK)
781 static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
785 bool *tun_on_same_port,
786 bool *tun_collect_md)
788 struct geneve_dev *geneve, *t;
790 *tun_on_same_port = false;
791 *tun_collect_md = false;
793 list_for_each_entry(geneve, &gn->geneve_list, next) {
794 if (geneve->dst_port == dst_port) {
795 *tun_collect_md = geneve->collect_md;
796 *tun_on_same_port = true;
798 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
799 rem_addr == geneve->remote.sin_addr.s_addr &&
800 dst_port == geneve->dst_port)
806 static int geneve_configure(struct net *net, struct net_device *dev,
807 __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos,
808 __u16 dst_port, bool metadata)
810 struct geneve_net *gn = net_generic(net, geneve_net_id);
811 struct geneve_dev *t, *geneve = netdev_priv(dev);
812 bool tun_collect_md, tun_on_same_port;
816 if (rem_addr || vni || tos || ttl)
823 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
824 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
825 geneve->vni[2] = vni & 0x000000ff;
827 geneve->remote.sin_addr.s_addr = rem_addr;
828 if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr)))
833 geneve->dst_port = htons(dst_port);
834 geneve->collect_md = metadata;
836 t = geneve_find_dev(gn, htons(dst_port), rem_addr, geneve->vni,
837 &tun_on_same_port, &tun_collect_md);
842 if (tun_on_same_port)
849 err = register_netdevice(dev);
853 list_add(&geneve->next, &gn->geneve_list);
857 static int geneve_newlink(struct net *net, struct net_device *dev,
858 struct nlattr *tb[], struct nlattr *data[])
860 __u16 dst_port = GENEVE_UDP_PORT;
861 __u8 ttl = 0, tos = 0;
862 bool metadata = false;
866 if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE])
869 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
870 rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
872 if (data[IFLA_GENEVE_TTL])
873 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
875 if (data[IFLA_GENEVE_TOS])
876 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
878 if (data[IFLA_GENEVE_PORT])
879 dst_port = nla_get_u16(data[IFLA_GENEVE_PORT]);
881 if (data[IFLA_GENEVE_COLLECT_METADATA])
884 return geneve_configure(net, dev, rem_addr, vni,
885 ttl, tos, dst_port, metadata);
888 static void geneve_dellink(struct net_device *dev, struct list_head *head)
890 struct geneve_dev *geneve = netdev_priv(dev);
892 list_del(&geneve->next);
893 unregister_netdevice_queue(dev, head);
896 static size_t geneve_get_size(const struct net_device *dev)
898 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
899 nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */
900 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
901 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
902 nla_total_size(sizeof(__u16)) + /* IFLA_GENEVE_PORT */
903 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
907 static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
909 struct geneve_dev *geneve = netdev_priv(dev);
912 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
913 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
914 goto nla_put_failure;
916 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
917 geneve->remote.sin_addr.s_addr))
918 goto nla_put_failure;
920 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
921 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos))
922 goto nla_put_failure;
924 if (nla_put_u16(skb, IFLA_GENEVE_PORT, ntohs(geneve->dst_port)))
925 goto nla_put_failure;
927 if (geneve->collect_md) {
928 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
929 goto nla_put_failure;
938 static struct rtnl_link_ops geneve_link_ops __read_mostly = {
940 .maxtype = IFLA_GENEVE_MAX,
941 .policy = geneve_policy,
942 .priv_size = sizeof(struct geneve_dev),
943 .setup = geneve_setup,
944 .validate = geneve_validate,
945 .newlink = geneve_newlink,
946 .dellink = geneve_dellink,
947 .get_size = geneve_get_size,
948 .fill_info = geneve_fill_info,
951 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
952 u8 name_assign_type, u16 dst_port)
954 struct nlattr *tb[IFLA_MAX + 1];
955 struct net_device *dev;
958 memset(tb, 0, sizeof(tb));
959 dev = rtnl_create_link(net, name, name_assign_type,
960 &geneve_link_ops, tb);
964 err = geneve_configure(net, dev, 0, 0, 0, 0, dst_port, true);
971 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
973 static __net_init int geneve_init_net(struct net *net)
975 struct geneve_net *gn = net_generic(net, geneve_net_id);
977 INIT_LIST_HEAD(&gn->geneve_list);
978 INIT_LIST_HEAD(&gn->sock_list);
982 static void __net_exit geneve_exit_net(struct net *net)
984 struct geneve_net *gn = net_generic(net, geneve_net_id);
985 struct geneve_dev *geneve, *next;
986 struct net_device *dev, *aux;
991 /* gather any geneve devices that were moved into this ns */
992 for_each_netdev_safe(net, dev, aux)
993 if (dev->rtnl_link_ops == &geneve_link_ops)
994 unregister_netdevice_queue(dev, &list);
996 /* now gather any other geneve devices that were created in this ns */
997 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
998 /* If geneve->dev is in the same netns, it was already added
999 * to the list by the previous loop.
1001 if (!net_eq(dev_net(geneve->dev), net))
1002 unregister_netdevice_queue(geneve->dev, &list);
1005 /* unregister the devices gathered above */
1006 unregister_netdevice_many(&list);
1010 static struct pernet_operations geneve_net_ops = {
1011 .init = geneve_init_net,
1012 .exit = geneve_exit_net,
1013 .id = &geneve_net_id,
1014 .size = sizeof(struct geneve_net),
1017 static int __init geneve_init_module(void)
1021 rc = register_pernet_subsys(&geneve_net_ops);
1025 rc = rtnl_link_register(&geneve_link_ops);
1031 unregister_pernet_subsys(&geneve_net_ops);
1035 late_initcall(geneve_init_module);
1037 static void __exit geneve_cleanup_module(void)
1039 rtnl_link_unregister(&geneve_link_ops);
1040 unregister_pernet_subsys(&geneve_net_ops);
1042 module_exit(geneve_cleanup_module);
1044 MODULE_LICENSE("GPL");
1045 MODULE_VERSION(GENEVE_NETDEV_VER);
1046 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1047 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1048 MODULE_ALIAS_RTNL_LINK("geneve");