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/gro_cells.h>
20 #include <net/rtnetlink.h>
21 #include <net/geneve.h>
22 #include <net/protocol.h>
24 #define GENEVE_NETDEV_VER "0.6"
26 #define GENEVE_UDP_PORT 6081
28 #define GENEVE_N_VID (1u << 24)
29 #define GENEVE_VID_MASK (GENEVE_N_VID - 1)
31 #define VNI_HASH_BITS 10
32 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
34 static bool log_ecn_error = true;
35 module_param(log_ecn_error, bool, 0644);
36 MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
39 #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
41 /* per-network namespace private data for this module */
43 struct list_head geneve_list;
44 struct list_head sock_list;
47 static int geneve_net_id;
49 /* Pseudo network device */
51 struct hlist_node hlist; /* vni hash table */
52 struct net *net; /* netns for packet i/o */
53 struct net_device *dev; /* netdev for geneve tunnel */
54 struct geneve_sock *sock; /* socket used for geneve tunnel */
55 u8 vni[3]; /* virtual network ID for tunnel */
56 u8 ttl; /* TTL override */
57 u8 tos; /* TOS override */
58 struct sockaddr_in remote; /* IPv4 address for link partner */
59 struct list_head next; /* geneve's per namespace list */
62 struct gro_cells gro_cells;
67 struct list_head list;
71 struct udp_offload udp_offloads;
72 struct hlist_head vni_list[VNI_HASH_SIZE];
75 static inline __u32 geneve_net_vni_hash(u8 vni[3])
79 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
80 return hash_32(vnid, VNI_HASH_BITS);
83 static __be64 vni_to_tunnel_id(const __u8 *vni)
86 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
88 return (__force __be64)(((__force u64)vni[0] << 40) |
89 ((__force u64)vni[1] << 48) |
90 ((__force u64)vni[2] << 56));
94 static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
95 __be32 addr, u8 vni[])
97 struct hlist_head *vni_list_head;
98 struct geneve_dev *geneve;
101 /* Find the device for this VNI */
102 hash = geneve_net_vni_hash(vni);
103 vni_list_head = &gs->vni_list[hash];
104 hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
105 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
106 addr == geneve->remote.sin_addr.s_addr)
112 static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
114 return (struct genevehdr *)(udp_hdr(skb) + 1);
117 /* geneve receive/decap routine */
118 static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
120 struct genevehdr *gnvh = geneve_hdr(skb);
121 struct metadata_dst *tun_dst = NULL;
122 struct geneve_dev *geneve = NULL;
123 struct pcpu_sw_netstats *stats;
129 if (gs->collect_md) {
130 static u8 zero_vni[3];
136 iph = ip_hdr(skb); /* Still outer IP header... */
140 geneve = geneve_lookup(gs, addr, vni);
144 if (ip_tunnel_collect_metadata() || gs->collect_md) {
147 flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
148 (gnvh->oam ? TUNNEL_OAM : 0) |
149 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
151 tun_dst = udp_tun_rx_dst(skb, AF_INET, flags,
152 vni_to_tunnel_id(gnvh->vni),
156 /* Update tunnel dst according to Geneve options. */
157 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
158 gnvh->options, gnvh->opt_len * 4);
160 /* Drop packets w/ critical options,
161 * since we don't support any...
167 skb_reset_mac_header(skb);
168 skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev)));
169 skb->protocol = eth_type_trans(skb, geneve->dev);
170 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
173 skb_dst_set(skb, &tun_dst->dst);
175 /* Ignore packet loops (and multicast echo) */
176 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr))
179 skb_reset_network_header(skb);
181 iph = ip_hdr(skb); /* Now inner IP header... */
182 err = IP_ECN_decapsulate(iph, skb);
186 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
187 &iph->saddr, iph->tos);
189 ++geneve->dev->stats.rx_frame_errors;
190 ++geneve->dev->stats.rx_errors;
195 stats = this_cpu_ptr(geneve->dev->tstats);
196 u64_stats_update_begin(&stats->syncp);
198 stats->rx_bytes += skb->len;
199 u64_stats_update_end(&stats->syncp);
201 gro_cells_receive(&geneve->gro_cells, skb);
204 /* Consume bad packet */
208 /* Setup stats when device is created */
209 static int geneve_init(struct net_device *dev)
211 struct geneve_dev *geneve = netdev_priv(dev);
214 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
218 err = gro_cells_init(&geneve->gro_cells, dev);
220 free_percpu(dev->tstats);
227 static void geneve_uninit(struct net_device *dev)
229 struct geneve_dev *geneve = netdev_priv(dev);
231 gro_cells_destroy(&geneve->gro_cells);
232 free_percpu(dev->tstats);
235 /* Callback from net/ipv4/udp.c to receive packets */
236 static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
238 struct genevehdr *geneveh;
239 struct geneve_sock *gs;
242 /* Need Geneve and inner Ethernet header to be present */
243 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
246 /* Return packets with reserved bits set */
247 geneveh = geneve_hdr(skb);
248 if (unlikely(geneveh->ver != GENEVE_VER))
251 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
254 opts_len = geneveh->opt_len * 4;
255 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
259 gs = rcu_dereference_sk_user_data(sk);
267 /* Consume bad packet */
272 /* Let the UDP layer deal with the skb */
276 static struct socket *geneve_create_sock(struct net *net, bool ipv6,
280 struct udp_port_cfg udp_conf;
283 memset(&udp_conf, 0, sizeof(udp_conf));
286 udp_conf.family = AF_INET6;
288 udp_conf.family = AF_INET;
289 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
292 udp_conf.local_udp_port = port;
294 /* Open UDP socket */
295 err = udp_sock_create(net, &udp_conf, &sock);
302 static void geneve_notify_add_rx_port(struct geneve_sock *gs)
304 struct sock *sk = gs->sock->sk;
305 sa_family_t sa_family = sk->sk_family;
308 if (sa_family == AF_INET) {
309 err = udp_add_offload(&gs->udp_offloads);
311 pr_warn("geneve: udp_add_offload failed with status %d\n",
316 static int geneve_hlen(struct genevehdr *gh)
318 return sizeof(*gh) + gh->opt_len * 4;
321 static struct sk_buff **geneve_gro_receive(struct sk_buff **head,
323 struct udp_offload *uoff)
325 struct sk_buff *p, **pp = NULL;
326 struct genevehdr *gh, *gh2;
327 unsigned int hlen, gh_len, off_gnv;
328 const struct packet_offload *ptype;
332 off_gnv = skb_gro_offset(skb);
333 hlen = off_gnv + sizeof(*gh);
334 gh = skb_gro_header_fast(skb, off_gnv);
335 if (skb_gro_header_hard(skb, hlen)) {
336 gh = skb_gro_header_slow(skb, hlen, off_gnv);
341 if (gh->ver != GENEVE_VER || gh->oam)
343 gh_len = geneve_hlen(gh);
345 hlen = off_gnv + gh_len;
346 if (skb_gro_header_hard(skb, hlen)) {
347 gh = skb_gro_header_slow(skb, hlen, off_gnv);
354 for (p = *head; p; p = p->next) {
355 if (!NAPI_GRO_CB(p)->same_flow)
358 gh2 = (struct genevehdr *)(p->data + off_gnv);
359 if (gh->opt_len != gh2->opt_len ||
360 memcmp(gh, gh2, gh_len)) {
361 NAPI_GRO_CB(p)->same_flow = 0;
366 type = gh->proto_type;
369 ptype = gro_find_receive_by_type(type);
375 skb_gro_pull(skb, gh_len);
376 skb_gro_postpull_rcsum(skb, gh, gh_len);
377 pp = ptype->callbacks.gro_receive(head, skb);
382 NAPI_GRO_CB(skb)->flush |= flush;
387 static int geneve_gro_complete(struct sk_buff *skb, int nhoff,
388 struct udp_offload *uoff)
390 struct genevehdr *gh;
391 struct packet_offload *ptype;
396 udp_tunnel_gro_complete(skb, nhoff);
398 gh = (struct genevehdr *)(skb->data + nhoff);
399 gh_len = geneve_hlen(gh);
400 type = gh->proto_type;
403 ptype = gro_find_complete_by_type(type);
405 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
411 /* Create new listen socket if needed */
412 static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
415 struct geneve_net *gn = net_generic(net, geneve_net_id);
416 struct geneve_sock *gs;
418 struct udp_tunnel_sock_cfg tunnel_cfg;
421 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
423 return ERR_PTR(-ENOMEM);
425 sock = geneve_create_sock(net, ipv6, port);
428 return ERR_CAST(sock);
433 for (h = 0; h < VNI_HASH_SIZE; ++h)
434 INIT_HLIST_HEAD(&gs->vni_list[h]);
436 /* Initialize the geneve udp offloads structure */
437 gs->udp_offloads.port = port;
438 gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive;
439 gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete;
440 geneve_notify_add_rx_port(gs);
442 /* Mark socket as an encapsulation socket */
443 tunnel_cfg.sk_user_data = gs;
444 tunnel_cfg.encap_type = 1;
445 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
446 tunnel_cfg.encap_destroy = NULL;
447 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
448 list_add(&gs->list, &gn->sock_list);
452 static void geneve_notify_del_rx_port(struct geneve_sock *gs)
454 struct sock *sk = gs->sock->sk;
455 sa_family_t sa_family = sk->sk_family;
457 if (sa_family == AF_INET)
458 udp_del_offload(&gs->udp_offloads);
461 static void geneve_sock_release(struct geneve_sock *gs)
467 geneve_notify_del_rx_port(gs);
468 udp_tunnel_sock_release(gs->sock);
472 static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
475 struct geneve_sock *gs;
477 list_for_each_entry(gs, &gn->sock_list, list) {
478 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
479 inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) {
486 static int geneve_open(struct net_device *dev)
488 struct geneve_dev *geneve = netdev_priv(dev);
489 struct net *net = geneve->net;
490 struct geneve_net *gn = net_generic(net, geneve_net_id);
491 struct geneve_sock *gs;
494 gs = geneve_find_sock(gn, geneve->dst_port);
500 gs = geneve_socket_create(net, geneve->dst_port, false);
505 gs->collect_md = geneve->collect_md;
508 hash = geneve_net_vni_hash(geneve->vni);
509 hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
513 static int geneve_stop(struct net_device *dev)
515 struct geneve_dev *geneve = netdev_priv(dev);
516 struct geneve_sock *gs = geneve->sock;
518 if (!hlist_unhashed(&geneve->hlist))
519 hlist_del_rcu(&geneve->hlist);
520 geneve_sock_release(gs);
524 static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
525 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
528 struct genevehdr *gnvh;
532 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
533 + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr);
534 err = skb_cow_head(skb, min_headroom);
540 skb = udp_tunnel_handle_offloads(skb, csum);
546 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
547 gnvh->ver = GENEVE_VER;
548 gnvh->opt_len = opt_len / 4;
549 gnvh->oam = !!(tun_flags & TUNNEL_OAM);
550 gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
552 memcpy(gnvh->vni, vni, 3);
553 gnvh->proto_type = htons(ETH_P_TEB);
555 memcpy(gnvh->options, opt, opt_len);
557 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
565 static struct rtable *geneve_get_rt(struct sk_buff *skb,
566 struct net_device *dev,
568 struct ip_tunnel_info *info)
570 struct geneve_dev *geneve = netdev_priv(dev);
571 struct rtable *rt = NULL;
574 memset(fl4, 0, sizeof(*fl4));
575 fl4->flowi4_mark = skb->mark;
576 fl4->flowi4_proto = IPPROTO_UDP;
579 fl4->daddr = info->key.u.ipv4.dst;
580 fl4->saddr = info->key.u.ipv4.src;
581 fl4->flowi4_tos = RT_TOS(info->key.tos);
585 const struct iphdr *iip = ip_hdr(skb);
587 tos = ip_tunnel_get_dsfield(iip, skb);
590 fl4->flowi4_tos = RT_TOS(tos);
591 fl4->daddr = geneve->remote.sin_addr.s_addr;
594 rt = ip_route_output_key(geneve->net, fl4);
596 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
597 dev->stats.tx_carrier_errors++;
600 if (rt->dst.dev == dev) { /* is this necessary? */
601 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
602 dev->stats.collisions++;
604 return ERR_PTR(-EINVAL);
609 /* Convert 64 bit tunnel ID to 24 bit VNI. */
610 static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
613 vni[0] = (__force __u8)(tun_id >> 16);
614 vni[1] = (__force __u8)(tun_id >> 8);
615 vni[2] = (__force __u8)tun_id;
617 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
618 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
619 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
623 static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
625 struct geneve_dev *geneve = netdev_priv(dev);
626 struct geneve_sock *gs = geneve->sock;
627 struct ip_tunnel_info *info = NULL;
628 struct rtable *rt = NULL;
636 if (geneve->collect_md) {
637 info = skb_tunnel_info(skb);
638 if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) {
639 netdev_dbg(dev, "no tunnel metadata\n");
642 if (info && ip_tunnel_info_af(info) != AF_INET)
646 rt = geneve_get_rt(skb, dev, &fl4, info);
648 netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr);
649 dev->stats.tx_carrier_errors++;
653 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
654 skb_reset_mac_header(skb);
657 const struct ip_tunnel_key *key = &info->key;
661 tunnel_id_to_vni(key->tun_id, vni);
662 if (key->tun_flags & TUNNEL_GENEVE_OPT)
663 opts = ip_tunnel_info_opts(info);
665 udp_csum = !!(key->tun_flags & TUNNEL_CSUM);
666 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
667 info->options_len, opts, udp_csum);
673 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
675 const struct iphdr *iip; /* interior IP header */
678 err = geneve_build_skb(rt, skb, 0, geneve->vni,
684 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb);
686 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
688 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
691 err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr,
692 tos, ttl, df, sport, geneve->dst_port,
693 !net_eq(geneve->net, dev_net(geneve->dev)),
696 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
702 dev->stats.tx_errors++;
706 static const struct net_device_ops geneve_netdev_ops = {
707 .ndo_init = geneve_init,
708 .ndo_uninit = geneve_uninit,
709 .ndo_open = geneve_open,
710 .ndo_stop = geneve_stop,
711 .ndo_start_xmit = geneve_xmit,
712 .ndo_get_stats64 = ip_tunnel_get_stats64,
713 .ndo_change_mtu = eth_change_mtu,
714 .ndo_validate_addr = eth_validate_addr,
715 .ndo_set_mac_address = eth_mac_addr,
718 static void geneve_get_drvinfo(struct net_device *dev,
719 struct ethtool_drvinfo *drvinfo)
721 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
722 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
725 static const struct ethtool_ops geneve_ethtool_ops = {
726 .get_drvinfo = geneve_get_drvinfo,
727 .get_link = ethtool_op_get_link,
730 /* Info for udev, that this is a virtual tunnel endpoint */
731 static struct device_type geneve_type = {
735 /* Initialize the device structure. */
736 static void geneve_setup(struct net_device *dev)
740 dev->netdev_ops = &geneve_netdev_ops;
741 dev->ethtool_ops = &geneve_ethtool_ops;
742 dev->destructor = free_netdev;
744 SET_NETDEV_DEVTYPE(dev, &geneve_type);
746 dev->features |= NETIF_F_LLTX;
747 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
748 dev->features |= NETIF_F_RXCSUM;
749 dev->features |= NETIF_F_GSO_SOFTWARE;
751 dev->vlan_features = dev->features;
752 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
754 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
755 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
756 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
759 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
760 eth_hw_addr_random(dev);
763 static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
764 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
765 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
766 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
767 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
768 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
769 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
772 static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
774 if (tb[IFLA_ADDRESS]) {
775 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
778 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
779 return -EADDRNOTAVAIL;
785 if (data[IFLA_GENEVE_ID]) {
786 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
788 if (vni >= GENEVE_VID_MASK)
795 static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
799 bool *tun_on_same_port,
800 bool *tun_collect_md)
802 struct geneve_dev *geneve, *t;
804 *tun_on_same_port = false;
805 *tun_collect_md = false;
807 list_for_each_entry(geneve, &gn->geneve_list, next) {
808 if (geneve->dst_port == dst_port) {
809 *tun_collect_md = geneve->collect_md;
810 *tun_on_same_port = true;
812 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
813 rem_addr == geneve->remote.sin_addr.s_addr &&
814 dst_port == geneve->dst_port)
820 static int geneve_configure(struct net *net, struct net_device *dev,
821 __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos,
822 __u16 dst_port, bool metadata)
824 struct geneve_net *gn = net_generic(net, geneve_net_id);
825 struct geneve_dev *t, *geneve = netdev_priv(dev);
826 bool tun_collect_md, tun_on_same_port;
830 if (rem_addr || vni || tos || ttl)
837 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
838 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
839 geneve->vni[2] = vni & 0x000000ff;
841 geneve->remote.sin_addr.s_addr = rem_addr;
842 if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr)))
847 geneve->dst_port = htons(dst_port);
848 geneve->collect_md = metadata;
850 t = geneve_find_dev(gn, htons(dst_port), rem_addr, geneve->vni,
851 &tun_on_same_port, &tun_collect_md);
856 if (tun_on_same_port)
863 err = register_netdevice(dev);
867 list_add(&geneve->next, &gn->geneve_list);
871 static int geneve_newlink(struct net *net, struct net_device *dev,
872 struct nlattr *tb[], struct nlattr *data[])
874 __u16 dst_port = GENEVE_UDP_PORT;
875 __u8 ttl = 0, tos = 0;
876 bool metadata = false;
880 if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE])
883 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
884 rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
886 if (data[IFLA_GENEVE_TTL])
887 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
889 if (data[IFLA_GENEVE_TOS])
890 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
892 if (data[IFLA_GENEVE_PORT])
893 dst_port = nla_get_u16(data[IFLA_GENEVE_PORT]);
895 if (data[IFLA_GENEVE_COLLECT_METADATA])
898 return geneve_configure(net, dev, rem_addr, vni,
899 ttl, tos, dst_port, metadata);
902 static void geneve_dellink(struct net_device *dev, struct list_head *head)
904 struct geneve_dev *geneve = netdev_priv(dev);
906 list_del(&geneve->next);
907 unregister_netdevice_queue(dev, head);
910 static size_t geneve_get_size(const struct net_device *dev)
912 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
913 nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */
914 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
915 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
916 nla_total_size(sizeof(__u16)) + /* IFLA_GENEVE_PORT */
917 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
921 static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
923 struct geneve_dev *geneve = netdev_priv(dev);
926 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
927 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
928 goto nla_put_failure;
930 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
931 geneve->remote.sin_addr.s_addr))
932 goto nla_put_failure;
934 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
935 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos))
936 goto nla_put_failure;
938 if (nla_put_u16(skb, IFLA_GENEVE_PORT, ntohs(geneve->dst_port)))
939 goto nla_put_failure;
941 if (geneve->collect_md) {
942 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
943 goto nla_put_failure;
952 static struct rtnl_link_ops geneve_link_ops __read_mostly = {
954 .maxtype = IFLA_GENEVE_MAX,
955 .policy = geneve_policy,
956 .priv_size = sizeof(struct geneve_dev),
957 .setup = geneve_setup,
958 .validate = geneve_validate,
959 .newlink = geneve_newlink,
960 .dellink = geneve_dellink,
961 .get_size = geneve_get_size,
962 .fill_info = geneve_fill_info,
965 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
966 u8 name_assign_type, u16 dst_port)
968 struct nlattr *tb[IFLA_MAX + 1];
969 struct net_device *dev;
972 memset(tb, 0, sizeof(tb));
973 dev = rtnl_create_link(net, name, name_assign_type,
974 &geneve_link_ops, tb);
978 err = geneve_configure(net, dev, 0, 0, 0, 0, dst_port, true);
985 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
987 static __net_init int geneve_init_net(struct net *net)
989 struct geneve_net *gn = net_generic(net, geneve_net_id);
991 INIT_LIST_HEAD(&gn->geneve_list);
992 INIT_LIST_HEAD(&gn->sock_list);
996 static void __net_exit geneve_exit_net(struct net *net)
998 struct geneve_net *gn = net_generic(net, geneve_net_id);
999 struct geneve_dev *geneve, *next;
1000 struct net_device *dev, *aux;
1005 /* gather any geneve devices that were moved into this ns */
1006 for_each_netdev_safe(net, dev, aux)
1007 if (dev->rtnl_link_ops == &geneve_link_ops)
1008 unregister_netdevice_queue(dev, &list);
1010 /* now gather any other geneve devices that were created in this ns */
1011 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1012 /* If geneve->dev is in the same netns, it was already added
1013 * to the list by the previous loop.
1015 if (!net_eq(dev_net(geneve->dev), net))
1016 unregister_netdevice_queue(geneve->dev, &list);
1019 /* unregister the devices gathered above */
1020 unregister_netdevice_many(&list);
1024 static struct pernet_operations geneve_net_ops = {
1025 .init = geneve_init_net,
1026 .exit = geneve_exit_net,
1027 .id = &geneve_net_id,
1028 .size = sizeof(struct geneve_net),
1031 static int __init geneve_init_module(void)
1035 rc = register_pernet_subsys(&geneve_net_ops);
1039 rc = rtnl_link_register(&geneve_link_ops);
1045 unregister_pernet_subsys(&geneve_net_ops);
1049 late_initcall(geneve_init_module);
1051 static void __exit geneve_cleanup_module(void)
1053 rtnl_link_unregister(&geneve_link_ops);
1054 unregister_pernet_subsys(&geneve_net_ops);
1056 module_exit(geneve_cleanup_module);
1058 MODULE_LICENSE("GPL");
1059 MODULE_VERSION(GENEVE_NETDEV_VER);
1060 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1061 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1062 MODULE_ALIAS_RTNL_LINK("geneve");