blob: 42edd7b7902f16125f860fa37d3b1e45d2a4c1a2 [file] [log] [blame]
John W. Linville2d07dc72015-05-13 12:57:30 -04001/*
2 * GENEVE: Generic Network Virtualization Encapsulation
3 *
4 * Copyright (c) 2015 Red Hat, Inc.
5 *
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.
9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
14#include <linux/module.h>
John W. Linville2d07dc72015-05-13 12:57:30 -040015#include <linux/etherdevice.h>
16#include <linux/hash.h>
Pravin B Shelare305ac62015-08-26 23:46:52 -070017#include <net/dst_metadata.h>
Jesse Gross8e816df2015-08-28 16:54:40 -070018#include <net/gro_cells.h>
John W. Linville2d07dc72015-05-13 12:57:30 -040019#include <net/rtnetlink.h>
20#include <net/geneve.h>
Pravin B Shelar371bd102015-08-26 23:46:54 -070021#include <net/protocol.h>
John W. Linville2d07dc72015-05-13 12:57:30 -040022
23#define GENEVE_NETDEV_VER "0.6"
24
25#define GENEVE_UDP_PORT 6081
26
27#define GENEVE_N_VID (1u << 24)
28#define GENEVE_VID_MASK (GENEVE_N_VID - 1)
29
30#define VNI_HASH_BITS 10
31#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
32
33static bool log_ecn_error = true;
34module_param(log_ecn_error, bool, 0644);
35MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
36
Pravin B Shelar371bd102015-08-26 23:46:54 -070037#define GENEVE_VER 0
38#define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
39
John W. Linville2d07dc72015-05-13 12:57:30 -040040/* per-network namespace private data for this module */
41struct geneve_net {
Pravin B Shelar371bd102015-08-26 23:46:54 -070042 struct list_head geneve_list;
Pravin B Shelar371bd102015-08-26 23:46:54 -070043 struct list_head sock_list;
John W. Linville2d07dc72015-05-13 12:57:30 -040044};
45
Pravin B Shelar371bd102015-08-26 23:46:54 -070046static int geneve_net_id;
47
John W. Linville8ed66f02015-10-26 17:01:44 -040048union geneve_addr {
49 struct sockaddr_in sin;
50 struct sockaddr_in6 sin6;
51 struct sockaddr sa;
52};
53
54static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, };
55
John W. Linville2d07dc72015-05-13 12:57:30 -040056/* Pseudo network device */
57struct geneve_dev {
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 */
pravin shelarfceb9c32016-10-28 09:59:16 -070061 struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */
John W. Linville8ed66f02015-10-26 17:01:44 -040062#if IS_ENABLED(CONFIG_IPV6)
pravin shelarfceb9c32016-10-28 09:59:16 -070063 struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */
John W. Linville8ed66f02015-10-26 17:01:44 -040064#endif
John W. Linville8760ce52015-06-01 15:51:34 -040065 u8 vni[3]; /* virtual network ID for tunnel */
66 u8 ttl; /* TTL override */
John W. Linvilled8951122015-06-01 15:51:35 -040067 u8 tos; /* TOS override */
John W. Linville8ed66f02015-10-26 17:01:44 -040068 union geneve_addr remote; /* IP address for link partner */
John W. Linville2d07dc72015-05-13 12:57:30 -040069 struct list_head next; /* geneve's per namespace list */
Daniel Borkmann8eb3b992016-03-09 03:00:04 +010070 __be32 label; /* IPv6 flowlabel override */
Pravin B Shelarcd7918b2015-08-26 23:46:51 -070071 __be16 dst_port;
Pravin B Shelare305ac62015-08-26 23:46:52 -070072 bool collect_md;
Jesse Gross8e816df2015-08-28 16:54:40 -070073 struct gro_cells gro_cells;
Tom Herbertabe492b2015-12-10 12:37:45 -080074 u32 flags;
Paolo Abeni468dfff2016-02-12 15:43:58 +010075 struct dst_cache dst_cache;
John W. Linville2d07dc72015-05-13 12:57:30 -040076};
77
Tom Herbertabe492b2015-12-10 12:37:45 -080078/* Geneve device flags */
Alexander Duyck14f1f722016-02-19 11:26:24 -080079#define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0)
Tom Herbertabe492b2015-12-10 12:37:45 -080080#define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1)
81#define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2)
82
Pravin B Shelar371bd102015-08-26 23:46:54 -070083struct geneve_sock {
84 bool collect_md;
Pravin B Shelar371bd102015-08-26 23:46:54 -070085 struct list_head list;
86 struct socket *sock;
87 struct rcu_head rcu;
88 int refcnt;
Pravin B Shelar66d47002015-08-26 23:46:55 -070089 struct hlist_head vni_list[VNI_HASH_SIZE];
Tom Herbertabe492b2015-12-10 12:37:45 -080090 u32 flags;
Pravin B Shelar371bd102015-08-26 23:46:54 -070091};
John W. Linville2d07dc72015-05-13 12:57:30 -040092
93static inline __u32 geneve_net_vni_hash(u8 vni[3])
94{
95 __u32 vnid;
96
97 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
98 return hash_32(vnid, VNI_HASH_BITS);
99}
100
Pravin B Shelare305ac62015-08-26 23:46:52 -0700101static __be64 vni_to_tunnel_id(const __u8 *vni)
102{
103#ifdef __BIG_ENDIAN
104 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
105#else
106 return (__force __be64)(((__force u64)vni[0] << 40) |
107 ((__force u64)vni[1] << 48) |
108 ((__force u64)vni[2] << 56));
109#endif
110}
111
Jiri Benc1e9f12e2016-02-18 11:22:49 +0100112static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
113{
114 return gs->sock->sk->sk_family;
115}
116
Pravin B Shelar66d47002015-08-26 23:46:55 -0700117static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
Pravin B Shelar371bd102015-08-26 23:46:54 -0700118 __be32 addr, u8 vni[])
John W. Linville2d07dc72015-05-13 12:57:30 -0400119{
John W. Linville2d07dc72015-05-13 12:57:30 -0400120 struct hlist_head *vni_list_head;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700121 struct geneve_dev *geneve;
John W. Linville2d07dc72015-05-13 12:57:30 -0400122 __u32 hash;
123
John W. Linville2d07dc72015-05-13 12:57:30 -0400124 /* Find the device for this VNI */
Pravin B Shelar371bd102015-08-26 23:46:54 -0700125 hash = geneve_net_vni_hash(vni);
Pravin B Shelar66d47002015-08-26 23:46:55 -0700126 vni_list_head = &gs->vni_list[hash];
Pravin B Shelare305ac62015-08-26 23:46:52 -0700127 hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
Pravin B Shelar371bd102015-08-26 23:46:54 -0700128 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
John W. Linville8ed66f02015-10-26 17:01:44 -0400129 addr == geneve->remote.sin.sin_addr.s_addr)
Pravin B Shelare305ac62015-08-26 23:46:52 -0700130 return geneve;
John W. Linville2d07dc72015-05-13 12:57:30 -0400131 }
Pravin B Shelare305ac62015-08-26 23:46:52 -0700132 return NULL;
133}
134
John W. Linville8ed66f02015-10-26 17:01:44 -0400135#if IS_ENABLED(CONFIG_IPV6)
136static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs,
137 struct in6_addr addr6, u8 vni[])
138{
139 struct hlist_head *vni_list_head;
140 struct geneve_dev *geneve;
141 __u32 hash;
142
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))
149 return geneve;
150 }
151 return NULL;
152}
153#endif
154
Pravin B Shelar371bd102015-08-26 23:46:54 -0700155static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
156{
157 return (struct genevehdr *)(udp_hdr(skb) + 1);
158}
159
Jiri Benc9fc47542016-02-18 11:22:50 +0100160static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs,
161 struct sk_buff *skb)
Pravin B Shelare305ac62015-08-26 23:46:52 -0700162{
Jiri Benc9fc47542016-02-18 11:22:50 +0100163 u8 *vni;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700164 __be32 addr;
John W. Linville8ed66f02015-10-26 17:01:44 -0400165 static u8 zero_vni[3];
John W. Linville8ed66f02015-10-26 17:01:44 -0400166#if IS_ENABLED(CONFIG_IPV6)
John W. Linville8ed66f02015-10-26 17:01:44 -0400167 static struct in6_addr zero_addr6;
168#endif
Pravin B Shelare305ac62015-08-26 23:46:52 -0700169
Jiri Benc1e9f12e2016-02-18 11:22:49 +0100170 if (geneve_get_sk_family(gs) == AF_INET) {
Jiri Benc9fc47542016-02-18 11:22:50 +0100171 struct iphdr *iph;
172
John W. Linville8ed66f02015-10-26 17:01:44 -0400173 iph = ip_hdr(skb); /* outer IP header... */
Pravin B Shelar371bd102015-08-26 23:46:54 -0700174
John W. Linville8ed66f02015-10-26 17:01:44 -0400175 if (gs->collect_md) {
176 vni = zero_vni;
177 addr = 0;
178 } else {
Jiri Benc9fc47542016-02-18 11:22:50 +0100179 vni = geneve_hdr(skb)->vni;
John W. Linville8ed66f02015-10-26 17:01:44 -0400180 addr = iph->saddr;
181 }
182
Jiri Benc9fc47542016-02-18 11:22:50 +0100183 return geneve_lookup(gs, addr, vni);
John W. Linville8ed66f02015-10-26 17:01:44 -0400184#if IS_ENABLED(CONFIG_IPV6)
Jiri Benc1e9f12e2016-02-18 11:22:49 +0100185 } else if (geneve_get_sk_family(gs) == AF_INET6) {
Jiri Benc9fc47542016-02-18 11:22:50 +0100186 struct ipv6hdr *ip6h;
187 struct in6_addr addr6;
188
John W. Linville8ed66f02015-10-26 17:01:44 -0400189 ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
190
191 if (gs->collect_md) {
192 vni = zero_vni;
193 addr6 = zero_addr6;
194 } else {
Jiri Benc9fc47542016-02-18 11:22:50 +0100195 vni = geneve_hdr(skb)->vni;
John W. Linville8ed66f02015-10-26 17:01:44 -0400196 addr6 = ip6h->saddr;
197 }
198
Jiri Benc9fc47542016-02-18 11:22:50 +0100199 return geneve6_lookup(gs, addr6, vni);
John W. Linville8ed66f02015-10-26 17:01:44 -0400200#endif
Pravin B Shelar371bd102015-08-26 23:46:54 -0700201 }
Jiri Benc9fc47542016-02-18 11:22:50 +0100202 return NULL;
203}
204
205/* geneve receive/decap routine */
206static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
207 struct sk_buff *skb)
208{
209 struct genevehdr *gnvh = geneve_hdr(skb);
210 struct metadata_dst *tun_dst = NULL;
211 struct pcpu_sw_netstats *stats;
212 int err = 0;
213 void *oiph;
John W. Linville2d07dc72015-05-13 12:57:30 -0400214
Pravin B Shelar371bd102015-08-26 23:46:54 -0700215 if (ip_tunnel_collect_metadata() || gs->collect_md) {
Pravin B Shelare305ac62015-08-26 23:46:52 -0700216 __be16 flags;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700217
218 flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
219 (gnvh->oam ? TUNNEL_OAM : 0) |
220 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
221
Jiri Benc1e9f12e2016-02-18 11:22:49 +0100222 tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
Pravin B Shelare305ac62015-08-26 23:46:52 -0700223 vni_to_tunnel_id(gnvh->vni),
224 gnvh->opt_len * 4);
225 if (!tun_dst)
226 goto drop;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700227 /* Update tunnel dst according to Geneve options. */
Pravin B Shelar4c222792015-08-30 18:09:38 -0700228 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
229 gnvh->options, gnvh->opt_len * 4);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700230 } else {
231 /* Drop packets w/ critical options,
232 * since we don't support any...
233 */
234 if (gnvh->critical)
235 goto drop;
236 }
John W. Linville2d07dc72015-05-13 12:57:30 -0400237
238 skb_reset_mac_header(skb);
John W. Linville2d07dc72015-05-13 12:57:30 -0400239 skb->protocol = eth_type_trans(skb, geneve->dev);
240 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
241
Pravin B Shelare305ac62015-08-26 23:46:52 -0700242 if (tun_dst)
243 skb_dst_set(skb, &tun_dst->dst);
244
John W. Linville2d07dc72015-05-13 12:57:30 -0400245 /* Ignore packet loops (and multicast echo) */
246 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr))
247 goto drop;
248
Jiri Benc9fc47542016-02-18 11:22:50 +0100249 oiph = skb_network_header(skb);
John W. Linville2d07dc72015-05-13 12:57:30 -0400250 skb_reset_network_header(skb);
251
Jiri Benc9fc47542016-02-18 11:22:50 +0100252 if (geneve_get_sk_family(gs) == AF_INET)
253 err = IP_ECN_decapsulate(oiph, skb);
John W. Linville8ed66f02015-10-26 17:01:44 -0400254#if IS_ENABLED(CONFIG_IPV6)
Jiri Benc9fc47542016-02-18 11:22:50 +0100255 else
256 err = IP6_ECN_decapsulate(oiph, skb);
John W. Linville8ed66f02015-10-26 17:01:44 -0400257#endif
John W. Linville2d07dc72015-05-13 12:57:30 -0400258
259 if (unlikely(err)) {
John W. Linville8ed66f02015-10-26 17:01:44 -0400260 if (log_ecn_error) {
Jiri Benc9fc47542016-02-18 11:22:50 +0100261 if (geneve_get_sk_family(gs) == AF_INET)
John W. Linville8ed66f02015-10-26 17:01:44 -0400262 net_info_ratelimited("non-ECT from %pI4 "
263 "with TOS=%#x\n",
Jiri Benc9fc47542016-02-18 11:22:50 +0100264 &((struct iphdr *)oiph)->saddr,
265 ((struct iphdr *)oiph)->tos);
John W. Linville8ed66f02015-10-26 17:01:44 -0400266#if IS_ENABLED(CONFIG_IPV6)
Jiri Benc9fc47542016-02-18 11:22:50 +0100267 else
John W. Linville8ed66f02015-10-26 17:01:44 -0400268 net_info_ratelimited("non-ECT from %pI6\n",
Jiri Benc9fc47542016-02-18 11:22:50 +0100269 &((struct ipv6hdr *)oiph)->saddr);
John W. Linville8ed66f02015-10-26 17:01:44 -0400270#endif
271 }
John W. Linville2d07dc72015-05-13 12:57:30 -0400272 if (err > 1) {
273 ++geneve->dev->stats.rx_frame_errors;
274 ++geneve->dev->stats.rx_errors;
275 goto drop;
276 }
277 }
278
279 stats = this_cpu_ptr(geneve->dev->tstats);
280 u64_stats_update_begin(&stats->syncp);
281 stats->rx_packets++;
282 stats->rx_bytes += skb->len;
283 u64_stats_update_end(&stats->syncp);
284
Jesse Gross8e816df2015-08-28 16:54:40 -0700285 gro_cells_receive(&geneve->gro_cells, skb);
John W. Linville2d07dc72015-05-13 12:57:30 -0400286 return;
287drop:
288 /* Consume bad packet */
289 kfree_skb(skb);
290}
291
292/* Setup stats when device is created */
293static int geneve_init(struct net_device *dev)
294{
Jesse Gross8e816df2015-08-28 16:54:40 -0700295 struct geneve_dev *geneve = netdev_priv(dev);
296 int err;
297
John W. Linville2d07dc72015-05-13 12:57:30 -0400298 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
299 if (!dev->tstats)
300 return -ENOMEM;
Jesse Gross8e816df2015-08-28 16:54:40 -0700301
302 err = gro_cells_init(&geneve->gro_cells, dev);
303 if (err) {
304 free_percpu(dev->tstats);
305 return err;
306 }
307
Paolo Abeni468dfff2016-02-12 15:43:58 +0100308 err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL);
309 if (err) {
310 free_percpu(dev->tstats);
311 gro_cells_destroy(&geneve->gro_cells);
312 return err;
313 }
314
John W. Linville2d07dc72015-05-13 12:57:30 -0400315 return 0;
316}
317
318static void geneve_uninit(struct net_device *dev)
319{
Jesse Gross8e816df2015-08-28 16:54:40 -0700320 struct geneve_dev *geneve = netdev_priv(dev);
321
Paolo Abeni468dfff2016-02-12 15:43:58 +0100322 dst_cache_destroy(&geneve->dst_cache);
Jesse Gross8e816df2015-08-28 16:54:40 -0700323 gro_cells_destroy(&geneve->gro_cells);
John W. Linville2d07dc72015-05-13 12:57:30 -0400324 free_percpu(dev->tstats);
325}
326
Pravin B Shelar371bd102015-08-26 23:46:54 -0700327/* Callback from net/ipv4/udp.c to receive packets */
328static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
329{
330 struct genevehdr *geneveh;
Jiri Benc9fc47542016-02-18 11:22:50 +0100331 struct geneve_dev *geneve;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700332 struct geneve_sock *gs;
333 int opts_len;
334
335 /* Need Geneve and inner Ethernet header to be present */
336 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +0200337 goto drop;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700338
339 /* Return packets with reserved bits set */
340 geneveh = geneve_hdr(skb);
341 if (unlikely(geneveh->ver != GENEVE_VER))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +0200342 goto drop;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700343
344 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +0200345 goto drop;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700346
Jiri Benc9fc47542016-02-18 11:22:50 +0100347 gs = rcu_dereference_sk_user_data(sk);
348 if (!gs)
349 goto drop;
350
351 geneve = geneve_lookup_skb(gs, skb);
352 if (!geneve)
353 goto drop;
354
Pravin B Shelar371bd102015-08-26 23:46:54 -0700355 opts_len = geneveh->opt_len * 4;
356 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
Jiri Benc7f290c92016-02-18 11:22:52 +0100357 htons(ETH_P_TEB),
358 !net_eq(geneve->net, dev_net(geneve->dev))))
Pravin B Shelar371bd102015-08-26 23:46:54 -0700359 goto drop;
360
Jiri Benc9fc47542016-02-18 11:22:50 +0100361 geneve_rx(geneve, gs, skb);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700362 return 0;
363
364drop:
365 /* Consume bad packet */
366 kfree_skb(skb);
367 return 0;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700368}
369
370static struct socket *geneve_create_sock(struct net *net, bool ipv6,
Tom Herbertabe492b2015-12-10 12:37:45 -0800371 __be16 port, u32 flags)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700372{
373 struct socket *sock;
374 struct udp_port_cfg udp_conf;
375 int err;
376
377 memset(&udp_conf, 0, sizeof(udp_conf));
378
379 if (ipv6) {
380 udp_conf.family = AF_INET6;
John W. Linville8ed66f02015-10-26 17:01:44 -0400381 udp_conf.ipv6_v6only = 1;
Tom Herbertabe492b2015-12-10 12:37:45 -0800382 udp_conf.use_udp6_rx_checksums =
383 !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700384 } else {
385 udp_conf.family = AF_INET;
386 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
387 }
388
389 udp_conf.local_udp_port = port;
390
391 /* Open UDP socket */
392 err = udp_sock_create(net, &udp_conf, &sock);
393 if (err < 0)
394 return ERR_PTR(err);
395
396 return sock;
397}
398
Pravin B Shelar371bd102015-08-26 23:46:54 -0700399static int geneve_hlen(struct genevehdr *gh)
400{
401 return sizeof(*gh) + gh->opt_len * 4;
402}
403
Tom Herbert4a0090a2016-04-05 08:22:55 -0700404static struct sk_buff **geneve_gro_receive(struct sock *sk,
405 struct sk_buff **head,
406 struct sk_buff *skb)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700407{
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;
412 __be16 type;
413 int flush = 1;
414
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);
420 if (unlikely(!gh))
421 goto out;
422 }
423
424 if (gh->ver != GENEVE_VER || gh->oam)
425 goto out;
426 gh_len = geneve_hlen(gh);
427
428 hlen = off_gnv + gh_len;
429 if (skb_gro_header_hard(skb, hlen)) {
430 gh = skb_gro_header_slow(skb, hlen, off_gnv);
431 if (unlikely(!gh))
432 goto out;
433 }
434
Pravin B Shelar371bd102015-08-26 23:46:54 -0700435 for (p = *head; p; p = p->next) {
436 if (!NAPI_GRO_CB(p)->same_flow)
437 continue;
438
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;
443 continue;
444 }
445 }
446
447 type = gh->proto_type;
448
449 rcu_read_lock();
450 ptype = gro_find_receive_by_type(type);
Alexander Duyckc194cf92016-03-09 09:24:23 -0800451 if (!ptype)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700452 goto out_unlock;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700453
454 skb_gro_pull(skb, gh_len);
455 skb_gro_postpull_rcsum(skb, gh, gh_len);
Sabrina Dubrocafcd91dd2016-10-20 15:58:02 +0200456 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
Alexander Duyckc194cf92016-03-09 09:24:23 -0800457 flush = 0;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700458
459out_unlock:
460 rcu_read_unlock();
461out:
462 NAPI_GRO_CB(skb)->flush |= flush;
463
464 return pp;
465}
466
Tom Herbert4a0090a2016-04-05 08:22:55 -0700467static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb,
468 int nhoff)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700469{
470 struct genevehdr *gh;
471 struct packet_offload *ptype;
472 __be16 type;
473 int gh_len;
474 int err = -ENOSYS;
475
Pravin B Shelar371bd102015-08-26 23:46:54 -0700476 gh = (struct genevehdr *)(skb->data + nhoff);
477 gh_len = geneve_hlen(gh);
478 type = gh->proto_type;
479
480 rcu_read_lock();
481 ptype = gro_find_complete_by_type(type);
482 if (ptype)
483 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
484
485 rcu_read_unlock();
Jarno Rajahalme229740c2016-05-03 16:10:21 -0700486
487 skb_set_inner_mac_header(skb, nhoff + gh_len);
488
Pravin B Shelar371bd102015-08-26 23:46:54 -0700489 return err;
490}
491
492/* Create new listen socket if needed */
493static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
Tom Herbertabe492b2015-12-10 12:37:45 -0800494 bool ipv6, u32 flags)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700495{
496 struct geneve_net *gn = net_generic(net, geneve_net_id);
497 struct geneve_sock *gs;
498 struct socket *sock;
499 struct udp_tunnel_sock_cfg tunnel_cfg;
Pravin B Shelar66d47002015-08-26 23:46:55 -0700500 int h;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700501
502 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
503 if (!gs)
504 return ERR_PTR(-ENOMEM);
505
Tom Herbertabe492b2015-12-10 12:37:45 -0800506 sock = geneve_create_sock(net, ipv6, port, flags);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700507 if (IS_ERR(sock)) {
508 kfree(gs);
509 return ERR_CAST(sock);
510 }
511
512 gs->sock = sock;
513 gs->refcnt = 1;
Pravin B Shelar66d47002015-08-26 23:46:55 -0700514 for (h = 0; h < VNI_HASH_SIZE; ++h)
515 INIT_HLIST_HEAD(&gs->vni_list[h]);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700516
517 /* Initialize the geneve udp offloads structure */
Alexander Duycke7b3db52016-06-16 12:20:52 -0700518 udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700519
520 /* Mark socket as an encapsulation socket */
Tom Herbert4a0090a2016-04-05 08:22:55 -0700521 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
Pravin B Shelar371bd102015-08-26 23:46:54 -0700522 tunnel_cfg.sk_user_data = gs;
523 tunnel_cfg.encap_type = 1;
Tom Herbert4a0090a2016-04-05 08:22:55 -0700524 tunnel_cfg.gro_receive = geneve_gro_receive;
525 tunnel_cfg.gro_complete = geneve_gro_complete;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700526 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
527 tunnel_cfg.encap_destroy = NULL;
528 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700529 list_add(&gs->list, &gn->sock_list);
530 return gs;
531}
532
John W. Linville8ed66f02015-10-26 17:01:44 -0400533static void __geneve_sock_release(struct geneve_sock *gs)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700534{
John W. Linville8ed66f02015-10-26 17:01:44 -0400535 if (!gs || --gs->refcnt)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700536 return;
537
538 list_del(&gs->list);
Alexander Duycke7b3db52016-06-16 12:20:52 -0700539 udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700540 udp_tunnel_sock_release(gs->sock);
541 kfree_rcu(gs, rcu);
542}
543
John W. Linville8ed66f02015-10-26 17:01:44 -0400544static void geneve_sock_release(struct geneve_dev *geneve)
545{
pravin shelarfceb9c32016-10-28 09:59:16 -0700546 struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4);
John W. Linville8ed66f02015-10-26 17:01:44 -0400547#if IS_ENABLED(CONFIG_IPV6)
pravin shelarfceb9c32016-10-28 09:59:16 -0700548 struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6);
549
550 rcu_assign_pointer(geneve->sock6, NULL);
551#endif
552
553 rcu_assign_pointer(geneve->sock4, NULL);
554 synchronize_net();
555
556 __geneve_sock_release(gs4);
557#if IS_ENABLED(CONFIG_IPV6)
558 __geneve_sock_release(gs6);
John W. Linville8ed66f02015-10-26 17:01:44 -0400559#endif
560}
561
Pravin B Shelar371bd102015-08-26 23:46:54 -0700562static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
John W. Linville8ed66f02015-10-26 17:01:44 -0400563 sa_family_t family,
Pravin B Shelar371bd102015-08-26 23:46:54 -0700564 __be16 dst_port)
565{
566 struct geneve_sock *gs;
567
568 list_for_each_entry(gs, &gn->sock_list, list) {
569 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
Jiri Benc1e9f12e2016-02-18 11:22:49 +0100570 geneve_get_sk_family(gs) == family) {
Pravin B Shelar371bd102015-08-26 23:46:54 -0700571 return gs;
572 }
573 }
574 return NULL;
575}
576
John W. Linville8ed66f02015-10-26 17:01:44 -0400577static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
John W. Linville2d07dc72015-05-13 12:57:30 -0400578{
John W. Linville2d07dc72015-05-13 12:57:30 -0400579 struct net *net = geneve->net;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700580 struct geneve_net *gn = net_generic(net, geneve_net_id);
John W. Linville2d07dc72015-05-13 12:57:30 -0400581 struct geneve_sock *gs;
Pravin B Shelar66d47002015-08-26 23:46:55 -0700582 __u32 hash;
John W. Linville2d07dc72015-05-13 12:57:30 -0400583
John W. Linville8ed66f02015-10-26 17:01:44 -0400584 gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700585 if (gs) {
586 gs->refcnt++;
587 goto out;
588 }
589
Tom Herbertabe492b2015-12-10 12:37:45 -0800590 gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags);
John W. Linville2d07dc72015-05-13 12:57:30 -0400591 if (IS_ERR(gs))
592 return PTR_ERR(gs);
593
Pravin B Shelar371bd102015-08-26 23:46:54 -0700594out:
595 gs->collect_md = geneve->collect_md;
Tom Herbertabe492b2015-12-10 12:37:45 -0800596 gs->flags = geneve->flags;
John W. Linville8ed66f02015-10-26 17:01:44 -0400597#if IS_ENABLED(CONFIG_IPV6)
598 if (ipv6)
pravin shelarfceb9c32016-10-28 09:59:16 -0700599 rcu_assign_pointer(geneve->sock6, gs);
John W. Linville8ed66f02015-10-26 17:01:44 -0400600 else
601#endif
pravin shelarfceb9c32016-10-28 09:59:16 -0700602 rcu_assign_pointer(geneve->sock4, gs);
Pravin B Shelar66d47002015-08-26 23:46:55 -0700603
604 hash = geneve_net_vni_hash(geneve->vni);
605 hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
John W. Linville2d07dc72015-05-13 12:57:30 -0400606 return 0;
607}
608
John W. Linville8ed66f02015-10-26 17:01:44 -0400609static int geneve_open(struct net_device *dev)
610{
611 struct geneve_dev *geneve = netdev_priv(dev);
612 bool ipv6 = geneve->remote.sa.sa_family == AF_INET6;
613 bool metadata = geneve->collect_md;
614 int ret = 0;
615
John W. Linville8ed66f02015-10-26 17:01:44 -0400616#if IS_ENABLED(CONFIG_IPV6)
John W. Linville8ed66f02015-10-26 17:01:44 -0400617 if (ipv6 || metadata)
618 ret = geneve_sock_add(geneve, true);
619#endif
620 if (!ret && (!ipv6 || metadata))
621 ret = geneve_sock_add(geneve, false);
622 if (ret < 0)
623 geneve_sock_release(geneve);
624
625 return ret;
626}
627
John W. Linville2d07dc72015-05-13 12:57:30 -0400628static int geneve_stop(struct net_device *dev)
629{
630 struct geneve_dev *geneve = netdev_priv(dev);
John W. Linville2d07dc72015-05-13 12:57:30 -0400631
Pravin B Shelar66d47002015-08-26 23:46:55 -0700632 if (!hlist_unhashed(&geneve->hlist))
633 hlist_del_rcu(&geneve->hlist);
John W. Linville8ed66f02015-10-26 17:01:44 -0400634 geneve_sock_release(geneve);
John W. Linville2d07dc72015-05-13 12:57:30 -0400635 return 0;
636}
637
John W. Linville8ed66f02015-10-26 17:01:44 -0400638static void geneve_build_header(struct genevehdr *geneveh,
639 __be16 tun_flags, u8 vni[3],
640 u8 options_len, u8 *options)
641{
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);
646 geneveh->rsvd1 = 0;
647 memcpy(geneveh->vni, vni, 3);
648 geneveh->proto_type = htons(ETH_P_TEB);
649 geneveh->rsvd2 = 0;
650
651 memcpy(geneveh->options, options, options_len);
652}
653
Pravin B Shelar371bd102015-08-26 23:46:54 -0700654static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
655 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
Tom Herbertabe492b2015-12-10 12:37:45 -0800656 u32 flags, bool xnet)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700657{
658 struct genevehdr *gnvh;
659 int min_headroom;
660 int err;
Alexander Duyck14f1f722016-02-19 11:26:24 -0800661 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700662
John W. Linville8ed66f02015-10-26 17:01:44 -0400663 skb_scrub_packet(skb, xnet);
664
Pravin B Shelar371bd102015-08-26 23:46:54 -0700665 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);
Alexander Duyckaed069d2016-04-14 15:33:37 -0400668 if (unlikely(err))
Pravin B Shelar371bd102015-08-26 23:46:54 -0700669 goto free_rt;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700670
Alexander Duyckaed069d2016-04-14 15:33:37 -0400671 err = udp_tunnel_handle_offloads(skb, udp_sum);
672 if (err)
Pravin B Shelar371bd102015-08-26 23:46:54 -0700673 goto free_rt;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700674
675 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
John W. Linville8ed66f02015-10-26 17:01:44 -0400676 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700677
678 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
679 return 0;
680
681free_rt:
682 ip_rt_put(rt);
683 return err;
684}
685
John W. Linville8ed66f02015-10-26 17:01:44 -0400686#if IS_ENABLED(CONFIG_IPV6)
687static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb,
688 __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
Tom Herbertabe492b2015-12-10 12:37:45 -0800689 u32 flags, bool xnet)
John W. Linville8ed66f02015-10-26 17:01:44 -0400690{
691 struct genevehdr *gnvh;
692 int min_headroom;
693 int err;
Tom Herbertabe492b2015-12-10 12:37:45 -0800694 bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX);
John W. Linville8ed66f02015-10-26 17:01:44 -0400695
696 skb_scrub_packet(skb, xnet);
697
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);
Alexander Duyckaed069d2016-04-14 15:33:37 -0400701 if (unlikely(err))
John W. Linville8ed66f02015-10-26 17:01:44 -0400702 goto free_dst;
John W. Linville8ed66f02015-10-26 17:01:44 -0400703
Alexander Duyckaed069d2016-04-14 15:33:37 -0400704 err = udp_tunnel_handle_offloads(skb, udp_sum);
Dan Carpenter1ba64fa2016-04-19 17:30:56 +0300705 if (err)
John W. Linville8ed66f02015-10-26 17:01:44 -0400706 goto free_dst;
John W. Linville8ed66f02015-10-26 17:01:44 -0400707
708 gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
709 geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
710
711 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
712 return 0;
713
714free_dst:
715 dst_release(dst);
716 return err;
717}
718#endif
719
720static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
721 struct net_device *dev,
722 struct flowi4 *fl4,
723 struct ip_tunnel_info *info)
Pravin B Shelare305ac62015-08-26 23:46:52 -0700724{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +0100725 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700726 struct geneve_dev *geneve = netdev_priv(dev);
Paolo Abeni468dfff2016-02-12 15:43:58 +0100727 struct dst_cache *dst_cache;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700728 struct rtable *rt = NULL;
729 __u8 tos;
730
pravin shelarfceb9c32016-10-28 09:59:16 -0700731 if (!rcu_dereference(geneve->sock4))
732 return ERR_PTR(-EIO);
733
Pravin B Shelare305ac62015-08-26 23:46:52 -0700734 memset(fl4, 0, sizeof(*fl4));
735 fl4->flowi4_mark = skb->mark;
736 fl4->flowi4_proto = IPPROTO_UDP;
737
738 if (info) {
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);
Paolo Abeni468dfff2016-02-12 15:43:58 +0100742 dst_cache = &info->dst_cache;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700743 } else {
744 tos = geneve->tos;
745 if (tos == 1) {
746 const struct iphdr *iip = ip_hdr(skb);
747
748 tos = ip_tunnel_get_dsfield(iip, skb);
Paolo Abeni468dfff2016-02-12 15:43:58 +0100749 use_cache = false;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700750 }
751
752 fl4->flowi4_tos = RT_TOS(tos);
John W. Linville8ed66f02015-10-26 17:01:44 -0400753 fl4->daddr = geneve->remote.sin.sin_addr.s_addr;
Paolo Abeni468dfff2016-02-12 15:43:58 +0100754 dst_cache = &geneve->dst_cache;
755 }
756
Paolo Abeni468dfff2016-02-12 15:43:58 +0100757 if (use_cache) {
758 rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
759 if (rt)
760 return rt;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700761 }
762
763 rt = ip_route_output_key(geneve->net, fl4);
764 if (IS_ERR(rt)) {
765 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700766 return ERR_PTR(-ENETUNREACH);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700767 }
768 if (rt->dst.dev == dev) { /* is this necessary? */
769 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700770 ip_rt_put(rt);
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700771 return ERR_PTR(-ELOOP);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700772 }
Paolo Abeni468dfff2016-02-12 15:43:58 +0100773 if (use_cache)
774 dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700775 return rt;
776}
777
John W. Linville8ed66f02015-10-26 17:01:44 -0400778#if IS_ENABLED(CONFIG_IPV6)
779static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
780 struct net_device *dev,
781 struct flowi6 *fl6,
782 struct ip_tunnel_info *info)
783{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +0100784 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
John W. Linville8ed66f02015-10-26 17:01:44 -0400785 struct geneve_dev *geneve = netdev_priv(dev);
John W. Linville8ed66f02015-10-26 17:01:44 -0400786 struct dst_entry *dst = NULL;
Paolo Abeni468dfff2016-02-12 15:43:58 +0100787 struct dst_cache *dst_cache;
pravin shelarfceb9c32016-10-28 09:59:16 -0700788 struct geneve_sock *gs6;
John W. Linville3a56f862015-10-26 17:01:45 -0400789 __u8 prio;
John W. Linville8ed66f02015-10-26 17:01:44 -0400790
pravin shelarfceb9c32016-10-28 09:59:16 -0700791 gs6 = rcu_dereference(geneve->sock6);
792 if (!gs6)
793 return ERR_PTR(-EIO);
794
John W. Linville8ed66f02015-10-26 17:01:44 -0400795 memset(fl6, 0, sizeof(*fl6));
796 fl6->flowi6_mark = skb->mark;
797 fl6->flowi6_proto = IPPROTO_UDP;
798
799 if (info) {
800 fl6->daddr = info->key.u.ipv6.dst;
801 fl6->saddr = info->key.u.ipv6.src;
Daniel Borkmann95caf6f2016-03-18 18:37:58 +0100802 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos),
803 info->key.label);
Paolo Abeni468dfff2016-02-12 15:43:58 +0100804 dst_cache = &info->dst_cache;
John W. Linville8ed66f02015-10-26 17:01:44 -0400805 } else {
John W. Linville3a56f862015-10-26 17:01:45 -0400806 prio = geneve->tos;
807 if (prio == 1) {
808 const struct iphdr *iip = ip_hdr(skb);
809
810 prio = ip_tunnel_get_dsfield(iip, skb);
Paolo Abeni468dfff2016-02-12 15:43:58 +0100811 use_cache = false;
John W. Linville3a56f862015-10-26 17:01:45 -0400812 }
813
Daniel Borkmann95caf6f2016-03-18 18:37:58 +0100814 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
815 geneve->label);
John W. Linville8ed66f02015-10-26 17:01:44 -0400816 fl6->daddr = geneve->remote.sin6.sin6_addr;
Paolo Abeni468dfff2016-02-12 15:43:58 +0100817 dst_cache = &geneve->dst_cache;
818 }
819
Paolo Abeni468dfff2016-02-12 15:43:58 +0100820 if (use_cache) {
821 dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
822 if (dst)
823 return dst;
John W. Linville8ed66f02015-10-26 17:01:44 -0400824 }
825
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);
829 }
830 if (dst->dev == dev) { /* is this necessary? */
831 netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr);
832 dst_release(dst);
833 return ERR_PTR(-ELOOP);
834 }
835
Paolo Abeni468dfff2016-02-12 15:43:58 +0100836 if (use_cache)
837 dst_cache_set_ip6(dst_cache, dst, &fl6->saddr);
John W. Linville8ed66f02015-10-26 17:01:44 -0400838 return dst;
839}
840#endif
841
Pravin B Shelare305ac62015-08-26 23:46:52 -0700842/* Convert 64 bit tunnel ID to 24 bit VNI. */
843static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
844{
845#ifdef __BIG_ENDIAN
846 vni[0] = (__force __u8)(tun_id >> 16);
847 vni[1] = (__force __u8)(tun_id >> 8);
848 vni[2] = (__force __u8)tun_id;
849#else
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);
853#endif
854}
855
John W. Linville8ed66f02015-10-26 17:01:44 -0400856static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
857 struct ip_tunnel_info *info)
John W. Linville2d07dc72015-05-13 12:57:30 -0400858{
859 struct geneve_dev *geneve = netdev_priv(dev);
pravin shelarfceb9c32016-10-28 09:59:16 -0700860 struct geneve_sock *gs4;
John W. Linville2d07dc72015-05-13 12:57:30 -0400861 struct rtable *rt = NULL;
John W. Linville08399ef2015-09-21 10:29:09 -0400862 const struct iphdr *iip; /* interior IP header */
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700863 int err = -EINVAL;
John W. Linville2d07dc72015-05-13 12:57:30 -0400864 struct flowi4 fl4;
John W. Linville8760ce52015-06-01 15:51:34 -0400865 __u8 tos, ttl;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700866 __be16 sport;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700867 __be16 df;
John W. Linville8ed66f02015-10-26 17:01:44 -0400868 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
Tom Herbertabe492b2015-12-10 12:37:45 -0800869 u32 flags = geneve->flags;
John W. Linville2d07dc72015-05-13 12:57:30 -0400870
pravin shelarfceb9c32016-10-28 09:59:16 -0700871 gs4 = rcu_dereference(geneve->sock4);
872 if (!gs4)
873 goto tx_error;
874
Pravin B Shelare305ac62015-08-26 23:46:52 -0700875 if (geneve->collect_md) {
John W. Linville8ed66f02015-10-26 17:01:44 -0400876 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
Pravin B Shelare305ac62015-08-26 23:46:52 -0700877 netdev_dbg(dev, "no tunnel metadata\n");
878 goto tx_error;
879 }
Jiri Benc7f9562a2015-08-28 20:48:20 +0200880 if (info && ip_tunnel_info_af(info) != AF_INET)
881 goto tx_error;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700882 }
John W. Linville2d07dc72015-05-13 12:57:30 -0400883
John W. Linville8ed66f02015-10-26 17:01:44 -0400884 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
John W. Linville2d07dc72015-05-13 12:57:30 -0400885 if (IS_ERR(rt)) {
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700886 err = PTR_ERR(rt);
John W. Linville2d07dc72015-05-13 12:57:30 -0400887 goto tx_error;
888 }
Pravin B Shelar371bd102015-08-26 23:46:54 -0700889
890 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700891 skb_reset_mac_header(skb);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700892
John W. Linville08399ef2015-09-21 10:29:09 -0400893 iip = ip_hdr(skb);
894
Pravin B Shelare305ac62015-08-26 23:46:52 -0700895 if (info) {
896 const struct ip_tunnel_key *key = &info->key;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700897 u8 *opts = NULL;
898 u8 vni[3];
Pravin B Shelare305ac62015-08-26 23:46:52 -0700899
900 tunnel_id_to_vni(key->tun_id, vni);
Daniel Borkmann14ca0752016-03-04 15:15:06 +0100901 if (info->options_len)
Pravin B Shelar4c222792015-08-30 18:09:38 -0700902 opts = ip_tunnel_info_opts(info);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700903
Tom Herbertabe492b2015-12-10 12:37:45 -0800904 if (key->tun_flags & TUNNEL_CSUM)
Alexander Duyck14f1f722016-02-19 11:26:24 -0800905 flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX;
Tom Herbertabe492b2015-12-10 12:37:45 -0800906 else
Alexander Duyck14f1f722016-02-19 11:26:24 -0800907 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
Tom Herbertabe492b2015-12-10 12:37:45 -0800908
Pravin B Shelar371bd102015-08-26 23:46:54 -0700909 err = geneve_build_skb(rt, skb, key->tun_flags, vni,
Tom Herbertabe492b2015-12-10 12:37:45 -0800910 info->options_len, opts, flags, xnet);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700911 if (unlikely(err))
Alexander Duyckaed069d2016-04-14 15:33:37 -0400912 goto tx_error;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700913
John W. Linville08399ef2015-09-21 10:29:09 -0400914 tos = ip_tunnel_ecn_encap(key->tos, iip, skb);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700915 ttl = key->ttl;
916 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700917 } else {
Pravin B Shelar371bd102015-08-26 23:46:54 -0700918 err = geneve_build_skb(rt, skb, 0, geneve->vni,
Tom Herbertabe492b2015-12-10 12:37:45 -0800919 0, NULL, flags, xnet);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700920 if (unlikely(err))
Alexander Duyckaed069d2016-04-14 15:33:37 -0400921 goto tx_error;
Pravin B Shelar371bd102015-08-26 23:46:54 -0700922
Pravin B Shelare305ac62015-08-26 23:46:52 -0700923 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb);
Pravin B Shelare305ac62015-08-26 23:46:52 -0700924 ttl = geneve->ttl;
925 if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
926 ttl = 1;
Pravin B Shelare305ac62015-08-26 23:46:52 -0700927 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
Pravin B Shelar371bd102015-08-26 23:46:54 -0700928 df = 0;
John W. Linville2d07dc72015-05-13 12:57:30 -0400929 }
Pravin B Shelar039f5062015-12-24 14:34:54 -0800930 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)),
Alexander Duyck14f1f722016-02-19 11:26:24 -0800933 !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX));
John W. Linville2d07dc72015-05-13 12:57:30 -0400934
John W. Linville2d07dc72015-05-13 12:57:30 -0400935 return NETDEV_TX_OK;
936
John W. Linville2d07dc72015-05-13 12:57:30 -0400937tx_error:
John W. Linville2d07dc72015-05-13 12:57:30 -0400938 dev_kfree_skb(skb);
Alexander Duyckaed069d2016-04-14 15:33:37 -0400939
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700940 if (err == -ELOOP)
941 dev->stats.collisions++;
942 else if (err == -ENETUNREACH)
943 dev->stats.tx_carrier_errors++;
Haishuang Yanefeb2262016-06-21 16:26:49 +0800944
945 dev->stats.tx_errors++;
John W. Linville2d07dc72015-05-13 12:57:30 -0400946 return NETDEV_TX_OK;
947}
948
John W. Linville8ed66f02015-10-26 17:01:44 -0400949#if IS_ENABLED(CONFIG_IPV6)
950static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
951 struct ip_tunnel_info *info)
952{
953 struct geneve_dev *geneve = netdev_priv(dev);
John W. Linville8ed66f02015-10-26 17:01:44 -0400954 struct dst_entry *dst = NULL;
John W. Linville3a56f862015-10-26 17:01:45 -0400955 const struct iphdr *iip; /* interior IP header */
pravin shelarfceb9c32016-10-28 09:59:16 -0700956 struct geneve_sock *gs6;
John W. Linville8ed66f02015-10-26 17:01:44 -0400957 int err = -EINVAL;
958 struct flowi6 fl6;
John W. Linville3a56f862015-10-26 17:01:45 -0400959 __u8 prio, ttl;
John W. Linville8ed66f02015-10-26 17:01:44 -0400960 __be16 sport;
Daniel Borkmann8eb3b992016-03-09 03:00:04 +0100961 __be32 label;
John W. Linville8ed66f02015-10-26 17:01:44 -0400962 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
Tom Herbertabe492b2015-12-10 12:37:45 -0800963 u32 flags = geneve->flags;
John W. Linville8ed66f02015-10-26 17:01:44 -0400964
pravin shelarfceb9c32016-10-28 09:59:16 -0700965 gs6 = rcu_dereference(geneve->sock6);
966 if (!gs6)
967 goto tx_error;
968
John W. Linville8ed66f02015-10-26 17:01:44 -0400969 if (geneve->collect_md) {
970 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
971 netdev_dbg(dev, "no tunnel metadata\n");
972 goto tx_error;
973 }
974 }
975
976 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
977 if (IS_ERR(dst)) {
978 err = PTR_ERR(dst);
979 goto tx_error;
980 }
981
982 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
983 skb_reset_mac_header(skb);
984
John W. Linville3a56f862015-10-26 17:01:45 -0400985 iip = ip_hdr(skb);
986
John W. Linville8ed66f02015-10-26 17:01:44 -0400987 if (info) {
988 const struct ip_tunnel_key *key = &info->key;
989 u8 *opts = NULL;
990 u8 vni[3];
991
992 tunnel_id_to_vni(key->tun_id, vni);
Daniel Borkmann14ca0752016-03-04 15:15:06 +0100993 if (info->options_len)
John W. Linville8ed66f02015-10-26 17:01:44 -0400994 opts = ip_tunnel_info_opts(info);
995
Tom Herbertabe492b2015-12-10 12:37:45 -0800996 if (key->tun_flags & TUNNEL_CSUM)
Jesse Gross35e2d112016-01-20 16:22:47 -0800997 flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX;
Tom Herbertabe492b2015-12-10 12:37:45 -0800998 else
Jesse Gross35e2d112016-01-20 16:22:47 -0800999 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
Tom Herbertabe492b2015-12-10 12:37:45 -08001000
John W. Linville8ed66f02015-10-26 17:01:44 -04001001 err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
1002 info->options_len, opts,
Tom Herbertabe492b2015-12-10 12:37:45 -08001003 flags, xnet);
John W. Linville8ed66f02015-10-26 17:01:44 -04001004 if (unlikely(err))
Alexander Duyckaed069d2016-04-14 15:33:37 -04001005 goto tx_error;
John W. Linville8ed66f02015-10-26 17:01:44 -04001006
John W. Linville3a56f862015-10-26 17:01:45 -04001007 prio = ip_tunnel_ecn_encap(key->tos, iip, skb);
John W. Linville8ed66f02015-10-26 17:01:44 -04001008 ttl = key->ttl;
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001009 label = info->key.label;
John W. Linville8ed66f02015-10-26 17:01:44 -04001010 } else {
John W. Linville8ed66f02015-10-26 17:01:44 -04001011 err = geneve6_build_skb(dst, skb, 0, geneve->vni,
Tom Herbertabe492b2015-12-10 12:37:45 -08001012 0, NULL, flags, xnet);
John W. Linville8ed66f02015-10-26 17:01:44 -04001013 if (unlikely(err))
Alexander Duyckaed069d2016-04-14 15:33:37 -04001014 goto tx_error;
John W. Linville8ed66f02015-10-26 17:01:44 -04001015
Daniel Borkmann95caf6f2016-03-18 18:37:58 +01001016 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1017 iip, skb);
John W. Linville8ed66f02015-10-26 17:01:44 -04001018 ttl = geneve->ttl;
1019 if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
1020 ttl = 1;
1021 ttl = ttl ? : ip6_dst_hoplimit(dst);
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001022 label = geneve->label;
John W. Linville8ed66f02015-10-26 17:01:44 -04001023 }
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001024
Pravin B Shelar039f5062015-12-24 14:34:54 -08001025 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001026 &fl6.saddr, &fl6.daddr, prio, ttl, label,
Pravin B Shelar039f5062015-12-24 14:34:54 -08001027 sport, geneve->dst_port,
1028 !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
John W. Linville8ed66f02015-10-26 17:01:44 -04001029 return NETDEV_TX_OK;
1030
1031tx_error:
1032 dev_kfree_skb(skb);
Alexander Duyckaed069d2016-04-14 15:33:37 -04001033
John W. Linville8ed66f02015-10-26 17:01:44 -04001034 if (err == -ELOOP)
1035 dev->stats.collisions++;
1036 else if (err == -ENETUNREACH)
1037 dev->stats.tx_carrier_errors++;
Haishuang Yanefeb2262016-06-21 16:26:49 +08001038
1039 dev->stats.tx_errors++;
John W. Linville8ed66f02015-10-26 17:01:44 -04001040 return NETDEV_TX_OK;
1041}
1042#endif
1043
1044static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1045{
1046 struct geneve_dev *geneve = netdev_priv(dev);
1047 struct ip_tunnel_info *info = NULL;
1048
1049 if (geneve->collect_md)
1050 info = skb_tunnel_info(skb);
1051
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);
1056#endif
1057 return geneve_xmit_skb(skb, dev, info);
1058}
1059
David Wraggaeee0e62016-02-18 17:43:29 +00001060static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict)
David Wragg55e5bfb2016-02-10 00:05:57 +00001061{
Haishuang Yand5d5e8d2016-07-02 15:02:48 +08001062 struct geneve_dev *geneve = netdev_priv(dev);
David Wraggaeee0e62016-02-18 17:43:29 +00001063 /* The max_mtu calculation does not take account of GENEVE
1064 * options, to avoid excluding potentially valid
1065 * configurations.
David Wragg55e5bfb2016-02-10 00:05:57 +00001066 */
Haishuang Yand5d5e8d2016-07-02 15:02:48 +08001067 int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1068
1069 if (geneve->remote.sa.sa_family == AF_INET6)
1070 max_mtu -= sizeof(struct ipv6hdr);
1071 else
1072 max_mtu -= sizeof(struct iphdr);
David Wraggaeee0e62016-02-18 17:43:29 +00001073
1074 if (new_mtu < 68)
David Wragg55e5bfb2016-02-10 00:05:57 +00001075 return -EINVAL;
David Wraggaeee0e62016-02-18 17:43:29 +00001076
1077 if (new_mtu > max_mtu) {
1078 if (strict)
1079 return -EINVAL;
1080
1081 new_mtu = max_mtu;
1082 }
1083
David Wragg55e5bfb2016-02-10 00:05:57 +00001084 dev->mtu = new_mtu;
1085 return 0;
1086}
1087
David Wraggaeee0e62016-02-18 17:43:29 +00001088static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1089{
1090 return __geneve_change_mtu(dev, new_mtu, true);
1091}
1092
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001093static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1094{
1095 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1096 struct geneve_dev *geneve = netdev_priv(dev);
1097 struct rtable *rt;
1098 struct flowi4 fl4;
John W. Linvilleb8812fa2015-10-27 09:49:00 -04001099#if IS_ENABLED(CONFIG_IPV6)
1100 struct dst_entry *dst;
1101 struct flowi6 fl6;
1102#endif
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001103
John W. Linvilleb8812fa2015-10-27 09:49:00 -04001104 if (ip_tunnel_info_af(info) == AF_INET) {
1105 rt = geneve_get_v4_rt(skb, dev, &fl4, info);
1106 if (IS_ERR(rt))
1107 return PTR_ERR(rt);
1108
1109 ip_rt_put(rt);
1110 info->key.u.ipv4.src = fl4.saddr;
1111#if IS_ENABLED(CONFIG_IPV6)
1112 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1113 dst = geneve_get_v6_dst(skb, dev, &fl6, info);
1114 if (IS_ERR(dst))
1115 return PTR_ERR(dst);
1116
1117 dst_release(dst);
1118 info->key.u.ipv6.src = fl6.saddr;
1119#endif
1120 } else {
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001121 return -EINVAL;
John W. Linvilleb8812fa2015-10-27 09:49:00 -04001122 }
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001123
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001124 info->key.tp_src = udp_flow_src_port(geneve->net, skb,
1125 1, USHRT_MAX, true);
1126 info->key.tp_dst = geneve->dst_port;
1127 return 0;
1128}
1129
John W. Linville2d07dc72015-05-13 12:57:30 -04001130static const struct net_device_ops geneve_netdev_ops = {
1131 .ndo_init = geneve_init,
1132 .ndo_uninit = geneve_uninit,
1133 .ndo_open = geneve_open,
1134 .ndo_stop = geneve_stop,
1135 .ndo_start_xmit = geneve_xmit,
1136 .ndo_get_stats64 = ip_tunnel_get_stats64,
David Wragg55e5bfb2016-02-10 00:05:57 +00001137 .ndo_change_mtu = geneve_change_mtu,
John W. Linville2d07dc72015-05-13 12:57:30 -04001138 .ndo_validate_addr = eth_validate_addr,
1139 .ndo_set_mac_address = eth_mac_addr,
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07001140 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
John W. Linville2d07dc72015-05-13 12:57:30 -04001141};
1142
1143static void geneve_get_drvinfo(struct net_device *dev,
1144 struct ethtool_drvinfo *drvinfo)
1145{
1146 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1147 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1148}
1149
1150static const struct ethtool_ops geneve_ethtool_ops = {
1151 .get_drvinfo = geneve_get_drvinfo,
1152 .get_link = ethtool_op_get_link,
1153};
1154
1155/* Info for udev, that this is a virtual tunnel endpoint */
1156static struct device_type geneve_type = {
1157 .name = "geneve",
1158};
1159
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02001160/* Calls the ndo_udp_tunnel_add of the caller in order to
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001161 * supply the listening GENEVE udp ports. Callers are expected
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02001162 * to implement the ndo_udp_tunnel_add.
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001163 */
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001164static void geneve_push_rx_ports(struct net_device *dev)
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001165{
1166 struct net *net = dev_net(dev);
1167 struct geneve_net *gn = net_generic(net, geneve_net_id);
1168 struct geneve_sock *gs;
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001169
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001170 rcu_read_lock();
Alexander Duycke7b3db52016-06-16 12:20:52 -07001171 list_for_each_entry_rcu(gs, &gn->sock_list, list)
1172 udp_tunnel_push_rx_port(dev, gs->sock,
1173 UDP_TUNNEL_TYPE_GENEVE);
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001174 rcu_read_unlock();
1175}
Singhai, Anjali05ca4022015-12-14 12:21:20 -08001176
John W. Linville2d07dc72015-05-13 12:57:30 -04001177/* Initialize the device structure. */
1178static void geneve_setup(struct net_device *dev)
1179{
1180 ether_setup(dev);
1181
1182 dev->netdev_ops = &geneve_netdev_ops;
1183 dev->ethtool_ops = &geneve_ethtool_ops;
1184 dev->destructor = free_netdev;
1185
1186 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1187
John W. Linville2d07dc72015-05-13 12:57:30 -04001188 dev->features |= NETIF_F_LLTX;
1189 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1190 dev->features |= NETIF_F_RXCSUM;
1191 dev->features |= NETIF_F_GSO_SOFTWARE;
1192
John W. Linville2d07dc72015-05-13 12:57:30 -04001193 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1194 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
John W. Linville2d07dc72015-05-13 12:57:30 -04001195
1196 netif_keep_dst(dev);
Jiri Bencfc41cdb2016-02-17 15:31:35 +01001197 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Phil Suttered961ac2015-08-18 10:30:31 +02001198 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
Pravin B Shelar87cd3dc2015-08-26 23:46:48 -07001199 eth_hw_addr_random(dev);
John W. Linville2d07dc72015-05-13 12:57:30 -04001200}
1201
1202static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1203 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1204 [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
John W. Linville8ed66f02015-10-26 17:01:44 -04001205 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
John W. Linville8760ce52015-06-01 15:51:34 -04001206 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
John W. Linvilled8951122015-06-01 15:51:35 -04001207 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001208 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
Pravin B Shelarcd7918b2015-08-26 23:46:51 -07001209 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
Pravin B Shelare305ac62015-08-26 23:46:52 -07001210 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
Tom Herbertabe492b2015-12-10 12:37:45 -08001211 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1212 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1213 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
John W. Linville2d07dc72015-05-13 12:57:30 -04001214};
1215
1216static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
1217{
1218 if (tb[IFLA_ADDRESS]) {
1219 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1220 return -EINVAL;
1221
1222 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1223 return -EADDRNOTAVAIL;
1224 }
1225
1226 if (!data)
1227 return -EINVAL;
1228
1229 if (data[IFLA_GENEVE_ID]) {
1230 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1231
1232 if (vni >= GENEVE_VID_MASK)
1233 return -ERANGE;
1234 }
1235
1236 return 0;
1237}
1238
Pravin B Shelar371bd102015-08-26 23:46:54 -07001239static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1240 __be16 dst_port,
John W. Linville8ed66f02015-10-26 17:01:44 -04001241 union geneve_addr *remote,
Pravin B Shelar371bd102015-08-26 23:46:54 -07001242 u8 vni[],
1243 bool *tun_on_same_port,
1244 bool *tun_collect_md)
1245{
1246 struct geneve_dev *geneve, *t;
1247
1248 *tun_on_same_port = false;
1249 *tun_collect_md = false;
1250 t = NULL;
1251 list_for_each_entry(geneve, &gn->geneve_list, next) {
1252 if (geneve->dst_port == dst_port) {
1253 *tun_collect_md = geneve->collect_md;
1254 *tun_on_same_port = true;
1255 }
1256 if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
John W. Linville8ed66f02015-10-26 17:01:44 -04001257 !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
Pravin B Shelar371bd102015-08-26 23:46:54 -07001258 dst_port == geneve->dst_port)
1259 t = geneve;
1260 }
1261 return t;
1262}
1263
Pravin B Shelare305ac62015-08-26 23:46:52 -07001264static int geneve_configure(struct net *net, struct net_device *dev,
John W. Linville8ed66f02015-10-26 17:01:44 -04001265 union geneve_addr *remote,
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001266 __u32 vni, __u8 ttl, __u8 tos, __be32 label,
1267 __be16 dst_port, bool metadata, u32 flags)
John W. Linville2d07dc72015-05-13 12:57:30 -04001268{
1269 struct geneve_net *gn = net_generic(net, geneve_net_id);
Pravin B Shelar371bd102015-08-26 23:46:54 -07001270 struct geneve_dev *t, *geneve = netdev_priv(dev);
1271 bool tun_collect_md, tun_on_same_port;
Paolo Abeni184fc8b2015-12-23 16:54:27 +01001272 int err, encap_len;
John W. Linville2d07dc72015-05-13 12:57:30 -04001273
John W. Linville8ed66f02015-10-26 17:01:44 -04001274 if (!remote)
1275 return -EINVAL;
1276 if (metadata &&
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001277 (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label))
John W. Linville8ed66f02015-10-26 17:01:44 -04001278 return -EINVAL;
John W. Linville2d07dc72015-05-13 12:57:30 -04001279
1280 geneve->net = net;
1281 geneve->dev = dev;
1282
John W. Linville2d07dc72015-05-13 12:57:30 -04001283 geneve->vni[0] = (vni & 0x00ff0000) >> 16;
1284 geneve->vni[1] = (vni & 0x0000ff00) >> 8;
1285 geneve->vni[2] = vni & 0x000000ff;
1286
John W. Linville8ed66f02015-10-26 17:01:44 -04001287 if ((remote->sa.sa_family == AF_INET &&
1288 IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) ||
1289 (remote->sa.sa_family == AF_INET6 &&
1290 ipv6_addr_is_multicast(&remote->sin6.sin6_addr)))
John W. Linville2d07dc72015-05-13 12:57:30 -04001291 return -EINVAL;
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001292 if (label && remote->sa.sa_family != AF_INET6)
1293 return -EINVAL;
1294
John W. Linville8ed66f02015-10-26 17:01:44 -04001295 geneve->remote = *remote;
John W. Linville2d07dc72015-05-13 12:57:30 -04001296
Pravin B Shelare305ac62015-08-26 23:46:52 -07001297 geneve->ttl = ttl;
1298 geneve->tos = tos;
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001299 geneve->label = label;
John W. Linville7bbe33f2015-09-22 13:09:32 -04001300 geneve->dst_port = dst_port;
Pravin B Shelare305ac62015-08-26 23:46:52 -07001301 geneve->collect_md = metadata;
Tom Herbertabe492b2015-12-10 12:37:45 -08001302 geneve->flags = flags;
Pravin B Shelare305ac62015-08-26 23:46:52 -07001303
John W. Linville8ed66f02015-10-26 17:01:44 -04001304 t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
Pravin B Shelar371bd102015-08-26 23:46:54 -07001305 &tun_on_same_port, &tun_collect_md);
1306 if (t)
1307 return -EBUSY;
1308
Paolo Abeni184fc8b2015-12-23 16:54:27 +01001309 /* make enough headroom for basic scenario */
1310 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1311 if (remote->sa.sa_family == AF_INET)
1312 encap_len += sizeof(struct iphdr);
1313 else
1314 encap_len += sizeof(struct ipv6hdr);
1315 dev->needed_headroom = encap_len + ETH_HLEN;
1316
Pravin B Shelar371bd102015-08-26 23:46:54 -07001317 if (metadata) {
1318 if (tun_on_same_port)
1319 return -EPERM;
1320 } else {
1321 if (tun_collect_md)
1322 return -EPERM;
1323 }
1324
Paolo Abeni468dfff2016-02-12 15:43:58 +01001325 dst_cache_reset(&geneve->dst_cache);
1326
John W. Linville2d07dc72015-05-13 12:57:30 -04001327 err = register_netdevice(dev);
1328 if (err)
1329 return err;
1330
1331 list_add(&geneve->next, &gn->geneve_list);
John W. Linville2d07dc72015-05-13 12:57:30 -04001332 return 0;
1333}
1334
Pravin B Shelare305ac62015-08-26 23:46:52 -07001335static int geneve_newlink(struct net *net, struct net_device *dev,
1336 struct nlattr *tb[], struct nlattr *data[])
1337{
John W. Linville7bbe33f2015-09-22 13:09:32 -04001338 __be16 dst_port = htons(GENEVE_UDP_PORT);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001339 __u8 ttl = 0, tos = 0;
1340 bool metadata = false;
John W. Linville8ed66f02015-10-26 17:01:44 -04001341 union geneve_addr remote = geneve_remote_unspec;
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001342 __be32 label = 0;
Jesse Grosse277de52015-10-16 16:36:00 -07001343 __u32 vni = 0;
Tom Herbertabe492b2015-12-10 12:37:45 -08001344 u32 flags = 0;
Pravin B Shelare305ac62015-08-26 23:46:52 -07001345
John W. Linville8ed66f02015-10-26 17:01:44 -04001346 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6])
1347 return -EINVAL;
1348
1349 if (data[IFLA_GENEVE_REMOTE]) {
1350 remote.sa.sa_family = AF_INET;
1351 remote.sin.sin_addr.s_addr =
1352 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1353 }
1354
1355 if (data[IFLA_GENEVE_REMOTE6]) {
1356 if (!IS_ENABLED(CONFIG_IPV6))
1357 return -EPFNOSUPPORT;
1358
1359 remote.sa.sa_family = AF_INET6;
1360 remote.sin6.sin6_addr =
1361 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1362
1363 if (ipv6_addr_type(&remote.sin6.sin6_addr) &
1364 IPV6_ADDR_LINKLOCAL) {
1365 netdev_dbg(dev, "link-local remote is unsupported\n");
1366 return -EINVAL;
1367 }
1368 }
1369
Jesse Grosse277de52015-10-16 16:36:00 -07001370 if (data[IFLA_GENEVE_ID])
1371 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001372
Pravin B Shelare305ac62015-08-26 23:46:52 -07001373 if (data[IFLA_GENEVE_TTL])
1374 ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1375
1376 if (data[IFLA_GENEVE_TOS])
1377 tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1378
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001379 if (data[IFLA_GENEVE_LABEL])
1380 label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1381 IPV6_FLOWLABEL_MASK;
1382
Pravin B Shelare305ac62015-08-26 23:46:52 -07001383 if (data[IFLA_GENEVE_PORT])
John W. Linville7bbe33f2015-09-22 13:09:32 -04001384 dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001385
1386 if (data[IFLA_GENEVE_COLLECT_METADATA])
1387 metadata = true;
1388
Tom Herbertabe492b2015-12-10 12:37:45 -08001389 if (data[IFLA_GENEVE_UDP_CSUM] &&
Alexander Duyck14f1f722016-02-19 11:26:24 -08001390 !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1391 flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
Tom Herbertabe492b2015-12-10 12:37:45 -08001392
1393 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
1394 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1395 flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
1396
1397 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] &&
1398 nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1399 flags |= GENEVE_F_UDP_ZERO_CSUM6_RX;
1400
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001401 return geneve_configure(net, dev, &remote, vni, ttl, tos, label,
1402 dst_port, metadata, flags);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001403}
1404
John W. Linville2d07dc72015-05-13 12:57:30 -04001405static void geneve_dellink(struct net_device *dev, struct list_head *head)
1406{
1407 struct geneve_dev *geneve = netdev_priv(dev);
1408
John W. Linville2d07dc72015-05-13 12:57:30 -04001409 list_del(&geneve->next);
1410 unregister_netdevice_queue(dev, head);
1411}
1412
1413static size_t geneve_get_size(const struct net_device *dev)
1414{
1415 return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
John W. Linville8ed66f02015-10-26 17:01:44 -04001416 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
John W. Linville8760ce52015-06-01 15:51:34 -04001417 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
John W. Linvilled8951122015-06-01 15:51:35 -04001418 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001419 nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */
John W. Linville7bbe33f2015-09-22 13:09:32 -04001420 nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
Pravin B Shelare305ac62015-08-26 23:46:52 -07001421 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
Tom Herbertabe492b2015-12-10 12:37:45 -08001422 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */
1423 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
1424 nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
John W. Linville2d07dc72015-05-13 12:57:30 -04001425 0;
1426}
1427
1428static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1429{
1430 struct geneve_dev *geneve = netdev_priv(dev);
1431 __u32 vni;
1432
1433 vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
1434 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1435 goto nla_put_failure;
1436
John W. Linville8ed66f02015-10-26 17:01:44 -04001437 if (geneve->remote.sa.sa_family == AF_INET) {
1438 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1439 geneve->remote.sin.sin_addr.s_addr))
1440 goto nla_put_failure;
1441#if IS_ENABLED(CONFIG_IPV6)
1442 } else {
1443 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1444 &geneve->remote.sin6.sin6_addr))
1445 goto nla_put_failure;
1446#endif
1447 }
John W. Linville2d07dc72015-05-13 12:57:30 -04001448
John W. Linvilled8951122015-06-01 15:51:35 -04001449 if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001450 nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) ||
1451 nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label))
John W. Linville8760ce52015-06-01 15:51:34 -04001452 goto nla_put_failure;
1453
John W. Linville7bbe33f2015-09-22 13:09:32 -04001454 if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port))
Pravin B Shelarcd7918b2015-08-26 23:46:51 -07001455 goto nla_put_failure;
1456
Pravin B Shelare305ac62015-08-26 23:46:52 -07001457 if (geneve->collect_md) {
1458 if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1459 goto nla_put_failure;
1460 }
1461
Tom Herbertabe492b2015-12-10 12:37:45 -08001462 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
Alexander Duyck14f1f722016-02-19 11:26:24 -08001463 !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) ||
Tom Herbertabe492b2015-12-10 12:37:45 -08001464 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1465 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) ||
1466 nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1467 !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)))
1468 goto nla_put_failure;
1469
John W. Linville2d07dc72015-05-13 12:57:30 -04001470 return 0;
1471
1472nla_put_failure:
1473 return -EMSGSIZE;
1474}
1475
1476static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1477 .kind = "geneve",
1478 .maxtype = IFLA_GENEVE_MAX,
1479 .policy = geneve_policy,
1480 .priv_size = sizeof(struct geneve_dev),
1481 .setup = geneve_setup,
1482 .validate = geneve_validate,
1483 .newlink = geneve_newlink,
1484 .dellink = geneve_dellink,
1485 .get_size = geneve_get_size,
1486 .fill_info = geneve_fill_info,
1487};
1488
Pravin B Shelare305ac62015-08-26 23:46:52 -07001489struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1490 u8 name_assign_type, u16 dst_port)
1491{
1492 struct nlattr *tb[IFLA_MAX + 1];
1493 struct net_device *dev;
Nicolas Dichtel106da662016-06-13 10:31:04 +02001494 LIST_HEAD(list_kill);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001495 int err;
1496
1497 memset(tb, 0, sizeof(tb));
1498 dev = rtnl_create_link(net, name, name_assign_type,
1499 &geneve_link_ops, tb);
1500 if (IS_ERR(dev))
1501 return dev;
1502
John W. Linville8ed66f02015-10-26 17:01:44 -04001503 err = geneve_configure(net, dev, &geneve_remote_unspec,
Daniel Borkmann8eb3b992016-03-09 03:00:04 +01001504 0, 0, 0, 0, htons(dst_port), true,
Paolo Abenic868ee72016-02-17 19:30:01 +01001505 GENEVE_F_UDP_ZERO_CSUM6_RX);
Nicolas Dichtel106da662016-06-13 10:31:04 +02001506 if (err) {
1507 free_netdev(dev);
1508 return ERR_PTR(err);
1509 }
David Wragg7e059152016-02-10 00:05:58 +00001510
1511 /* openvswitch users expect packet sizes to be unrestricted,
1512 * so set the largest MTU we can.
1513 */
David Wraggaeee0e62016-02-18 17:43:29 +00001514 err = __geneve_change_mtu(dev, IP_MAX_MTU, false);
David Wragg7e059152016-02-10 00:05:58 +00001515 if (err)
1516 goto err;
1517
Nicolas Dichtel41009482016-06-13 10:31:07 +02001518 err = rtnl_configure_link(dev, NULL);
1519 if (err < 0)
1520 goto err;
1521
Pravin B Shelare305ac62015-08-26 23:46:52 -07001522 return dev;
David Wragg7e059152016-02-10 00:05:58 +00001523
1524 err:
Nicolas Dichtel106da662016-06-13 10:31:04 +02001525 geneve_dellink(dev, &list_kill);
1526 unregister_netdevice_many(&list_kill);
David Wragg7e059152016-02-10 00:05:58 +00001527 return ERR_PTR(err);
Pravin B Shelare305ac62015-08-26 23:46:52 -07001528}
1529EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1530
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001531static int geneve_netdevice_event(struct notifier_block *unused,
1532 unsigned long event, void *ptr)
1533{
1534 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1535
Alexander Duyck7c46a642016-06-16 12:21:00 -07001536 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001537 geneve_push_rx_ports(dev);
1538
1539 return NOTIFY_DONE;
1540}
1541
1542static struct notifier_block geneve_notifier_block __read_mostly = {
1543 .notifier_call = geneve_netdevice_event,
1544};
1545
John W. Linville2d07dc72015-05-13 12:57:30 -04001546static __net_init int geneve_init_net(struct net *net)
1547{
1548 struct geneve_net *gn = net_generic(net, geneve_net_id);
John W. Linville2d07dc72015-05-13 12:57:30 -04001549
1550 INIT_LIST_HEAD(&gn->geneve_list);
Pravin B Shelar371bd102015-08-26 23:46:54 -07001551 INIT_LIST_HEAD(&gn->sock_list);
John W. Linville2d07dc72015-05-13 12:57:30 -04001552 return 0;
1553}
1554
1555static void __net_exit geneve_exit_net(struct net *net)
1556{
1557 struct geneve_net *gn = net_generic(net, geneve_net_id);
1558 struct geneve_dev *geneve, *next;
1559 struct net_device *dev, *aux;
1560 LIST_HEAD(list);
1561
1562 rtnl_lock();
1563
1564 /* gather any geneve devices that were moved into this ns */
1565 for_each_netdev_safe(net, dev, aux)
1566 if (dev->rtnl_link_ops == &geneve_link_ops)
1567 unregister_netdevice_queue(dev, &list);
1568
1569 /* now gather any other geneve devices that were created in this ns */
1570 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1571 /* If geneve->dev is in the same netns, it was already added
1572 * to the list by the previous loop.
1573 */
1574 if (!net_eq(dev_net(geneve->dev), net))
1575 unregister_netdevice_queue(geneve->dev, &list);
1576 }
1577
1578 /* unregister the devices gathered above */
1579 unregister_netdevice_many(&list);
1580 rtnl_unlock();
1581}
1582
1583static struct pernet_operations geneve_net_ops = {
1584 .init = geneve_init_net,
1585 .exit = geneve_exit_net,
1586 .id = &geneve_net_id,
1587 .size = sizeof(struct geneve_net),
1588};
1589
1590static int __init geneve_init_module(void)
1591{
1592 int rc;
1593
1594 rc = register_pernet_subsys(&geneve_net_ops);
1595 if (rc)
1596 goto out1;
1597
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001598 rc = register_netdevice_notifier(&geneve_notifier_block);
John W. Linville2d07dc72015-05-13 12:57:30 -04001599 if (rc)
1600 goto out2;
1601
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001602 rc = rtnl_link_register(&geneve_link_ops);
1603 if (rc)
1604 goto out3;
1605
John W. Linville2d07dc72015-05-13 12:57:30 -04001606 return 0;
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001607
1608out3:
1609 unregister_netdevice_notifier(&geneve_notifier_block);
John W. Linville2d07dc72015-05-13 12:57:30 -04001610out2:
1611 unregister_pernet_subsys(&geneve_net_ops);
1612out1:
1613 return rc;
1614}
1615late_initcall(geneve_init_module);
1616
1617static void __exit geneve_cleanup_module(void)
1618{
1619 rtnl_link_unregister(&geneve_link_ops);
Hannes Frederic Sowa681e6832016-04-18 21:19:48 +02001620 unregister_netdevice_notifier(&geneve_notifier_block);
John W. Linville2d07dc72015-05-13 12:57:30 -04001621 unregister_pernet_subsys(&geneve_net_ops);
1622}
1623module_exit(geneve_cleanup_module);
1624
1625MODULE_LICENSE("GPL");
1626MODULE_VERSION(GENEVE_NETDEV_VER);
1627MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1628MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1629MODULE_ALIAS_RTNL_LINK("geneve");