]>
Commit | Line | Data |
---|---|---|
2d07dc79 JL |
1 | /* |
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> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/hash.h> | |
e305ac6c | 18 | #include <net/dst_metadata.h> |
2d07dc79 JL |
19 | #include <net/rtnetlink.h> |
20 | #include <net/geneve.h> | |
371bd106 | 21 | #include <net/protocol.h> |
2d07dc79 JL |
22 | |
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 | ||
33 | static bool log_ecn_error = true; | |
34 | module_param(log_ecn_error, bool, 0644); | |
35 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
36 | ||
371bd106 PS |
37 | #define GENEVE_VER 0 |
38 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
39 | ||
2d07dc79 JL |
40 | /* per-network namespace private data for this module */ |
41 | struct geneve_net { | |
371bd106 | 42 | struct list_head geneve_list; |
371bd106 | 43 | struct list_head sock_list; |
2d07dc79 JL |
44 | }; |
45 | ||
371bd106 PS |
46 | static int geneve_net_id; |
47 | ||
2d07dc79 JL |
48 | /* Pseudo network device */ |
49 | struct geneve_dev { | |
50 | struct hlist_node hlist; /* vni hash table */ | |
51 | struct net *net; /* netns for packet i/o */ | |
52 | struct net_device *dev; /* netdev for geneve tunnel */ | |
53 | struct geneve_sock *sock; /* socket used for geneve tunnel */ | |
8760ce58 JL |
54 | u8 vni[3]; /* virtual network ID for tunnel */ |
55 | u8 ttl; /* TTL override */ | |
d8951125 | 56 | u8 tos; /* TOS override */ |
2d07dc79 JL |
57 | struct sockaddr_in remote; /* IPv4 address for link partner */ |
58 | struct list_head next; /* geneve's per namespace list */ | |
cd7918b3 | 59 | __be16 dst_port; |
e305ac6c | 60 | bool collect_md; |
2d07dc79 JL |
61 | }; |
62 | ||
371bd106 PS |
63 | struct geneve_sock { |
64 | bool collect_md; | |
371bd106 PS |
65 | struct list_head list; |
66 | struct socket *sock; | |
67 | struct rcu_head rcu; | |
68 | int refcnt; | |
69 | struct udp_offload udp_offloads; | |
66d47003 | 70 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 71 | }; |
2d07dc79 JL |
72 | |
73 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
74 | { | |
75 | __u32 vnid; | |
76 | ||
77 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
78 | return hash_32(vnid, VNI_HASH_BITS); | |
79 | } | |
80 | ||
e305ac6c PS |
81 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
82 | { | |
83 | #ifdef __BIG_ENDIAN | |
84 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
85 | #else | |
86 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
87 | ((__force u64)vni[1] << 48) | | |
88 | ((__force u64)vni[2] << 56)); | |
89 | #endif | |
90 | } | |
91 | ||
66d47003 | 92 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 93 | __be32 addr, u8 vni[]) |
2d07dc79 | 94 | { |
2d07dc79 | 95 | struct hlist_head *vni_list_head; |
e305ac6c | 96 | struct geneve_dev *geneve; |
2d07dc79 JL |
97 | __u32 hash; |
98 | ||
2d07dc79 | 99 | /* Find the device for this VNI */ |
371bd106 | 100 | hash = geneve_net_vni_hash(vni); |
66d47003 | 101 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 102 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 103 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
66d47003 | 104 | addr == geneve->remote.sin_addr.s_addr) |
e305ac6c | 105 | return geneve; |
2d07dc79 | 106 | } |
e305ac6c PS |
107 | return NULL; |
108 | } | |
109 | ||
371bd106 PS |
110 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
111 | { | |
112 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
113 | } | |
114 | ||
e305ac6c PS |
115 | /* geneve receive/decap routine */ |
116 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
117 | { | |
118 | struct genevehdr *gnvh = geneve_hdr(skb); | |
119 | struct metadata_dst *tun_dst = NULL; | |
120 | struct geneve_dev *geneve = NULL; | |
121 | struct pcpu_sw_netstats *stats; | |
e305ac6c | 122 | struct iphdr *iph; |
371bd106 PS |
123 | u8 *vni; |
124 | __be32 addr; | |
e305ac6c PS |
125 | int err; |
126 | ||
371bd106 PS |
127 | if (gs->collect_md) { |
128 | static u8 zero_vni[3]; | |
129 | ||
130 | vni = zero_vni; | |
131 | addr = 0; | |
132 | } else { | |
133 | vni = gnvh->vni; | |
66d47003 | 134 | iph = ip_hdr(skb); /* Still outer IP header... */ |
371bd106 PS |
135 | addr = iph->saddr; |
136 | } | |
137 | ||
66d47003 | 138 | geneve = geneve_lookup(gs, addr, vni); |
2d07dc79 JL |
139 | if (!geneve) |
140 | goto drop; | |
141 | ||
371bd106 | 142 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c PS |
143 | __be16 flags; |
144 | void *opts; | |
145 | ||
146 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
147 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
148 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
149 | ||
150 | tun_dst = udp_tun_rx_dst(skb, AF_INET, flags, | |
151 | vni_to_tunnel_id(gnvh->vni), | |
152 | gnvh->opt_len * 4); | |
153 | if (!tun_dst) | |
154 | goto drop; | |
155 | ||
156 | /* Update tunnel dst according to Geneve options. */ | |
157 | opts = ip_tunnel_info_opts(&tun_dst->u.tun_info, | |
158 | gnvh->opt_len * 4); | |
159 | memcpy(opts, gnvh->options, gnvh->opt_len * 4); | |
160 | } else { | |
161 | /* Drop packets w/ critical options, | |
162 | * since we don't support any... | |
163 | */ | |
164 | if (gnvh->critical) | |
165 | goto drop; | |
166 | } | |
2d07dc79 JL |
167 | |
168 | skb_reset_mac_header(skb); | |
169 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
170 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
171 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
172 | ||
e305ac6c PS |
173 | if (tun_dst) |
174 | skb_dst_set(skb, &tun_dst->dst); | |
175 | ||
2d07dc79 JL |
176 | /* Ignore packet loops (and multicast echo) */ |
177 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
178 | goto drop; | |
179 | ||
180 | skb_reset_network_header(skb); | |
181 | ||
182 | iph = ip_hdr(skb); /* Now inner IP header... */ | |
183 | err = IP_ECN_decapsulate(iph, skb); | |
184 | ||
185 | if (unlikely(err)) { | |
186 | if (log_ecn_error) | |
187 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
188 | &iph->saddr, iph->tos); | |
189 | if (err > 1) { | |
190 | ++geneve->dev->stats.rx_frame_errors; | |
191 | ++geneve->dev->stats.rx_errors; | |
192 | goto drop; | |
193 | } | |
194 | } | |
195 | ||
196 | stats = this_cpu_ptr(geneve->dev->tstats); | |
197 | u64_stats_update_begin(&stats->syncp); | |
198 | stats->rx_packets++; | |
199 | stats->rx_bytes += skb->len; | |
200 | u64_stats_update_end(&stats->syncp); | |
201 | ||
202 | netif_rx(skb); | |
2d07dc79 JL |
203 | return; |
204 | drop: | |
205 | /* Consume bad packet */ | |
206 | kfree_skb(skb); | |
207 | } | |
208 | ||
209 | /* Setup stats when device is created */ | |
210 | static int geneve_init(struct net_device *dev) | |
211 | { | |
212 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
213 | if (!dev->tstats) | |
214 | return -ENOMEM; | |
2d07dc79 JL |
215 | return 0; |
216 | } | |
217 | ||
218 | static void geneve_uninit(struct net_device *dev) | |
219 | { | |
220 | free_percpu(dev->tstats); | |
221 | } | |
222 | ||
371bd106 PS |
223 | /* Callback from net/ipv4/udp.c to receive packets */ |
224 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
225 | { | |
226 | struct genevehdr *geneveh; | |
227 | struct geneve_sock *gs; | |
228 | int opts_len; | |
229 | ||
230 | /* Need Geneve and inner Ethernet header to be present */ | |
231 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
232 | goto error; | |
233 | ||
234 | /* Return packets with reserved bits set */ | |
235 | geneveh = geneve_hdr(skb); | |
236 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
237 | goto error; | |
238 | ||
239 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
240 | goto error; | |
241 | ||
242 | opts_len = geneveh->opt_len * 4; | |
243 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
244 | htons(ETH_P_TEB))) | |
245 | goto drop; | |
246 | ||
247 | gs = rcu_dereference_sk_user_data(sk); | |
248 | if (!gs) | |
249 | goto drop; | |
250 | ||
251 | geneve_rx(gs, skb); | |
252 | return 0; | |
253 | ||
254 | drop: | |
255 | /* Consume bad packet */ | |
256 | kfree_skb(skb); | |
257 | return 0; | |
258 | ||
259 | error: | |
260 | /* Let the UDP layer deal with the skb */ | |
261 | return 1; | |
262 | } | |
263 | ||
264 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
265 | __be16 port) | |
266 | { | |
267 | struct socket *sock; | |
268 | struct udp_port_cfg udp_conf; | |
269 | int err; | |
270 | ||
271 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
272 | ||
273 | if (ipv6) { | |
274 | udp_conf.family = AF_INET6; | |
275 | } else { | |
276 | udp_conf.family = AF_INET; | |
277 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
278 | } | |
279 | ||
280 | udp_conf.local_udp_port = port; | |
281 | ||
282 | /* Open UDP socket */ | |
283 | err = udp_sock_create(net, &udp_conf, &sock); | |
284 | if (err < 0) | |
285 | return ERR_PTR(err); | |
286 | ||
287 | return sock; | |
288 | } | |
289 | ||
290 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
291 | { | |
292 | struct sock *sk = gs->sock->sk; | |
293 | sa_family_t sa_family = sk->sk_family; | |
294 | int err; | |
295 | ||
296 | if (sa_family == AF_INET) { | |
297 | err = udp_add_offload(&gs->udp_offloads); | |
298 | if (err) | |
299 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
300 | err); | |
301 | } | |
302 | } | |
303 | ||
304 | static int geneve_hlen(struct genevehdr *gh) | |
305 | { | |
306 | return sizeof(*gh) + gh->opt_len * 4; | |
307 | } | |
308 | ||
309 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
310 | struct sk_buff *skb, | |
311 | struct udp_offload *uoff) | |
312 | { | |
313 | struct sk_buff *p, **pp = NULL; | |
314 | struct genevehdr *gh, *gh2; | |
315 | unsigned int hlen, gh_len, off_gnv; | |
316 | const struct packet_offload *ptype; | |
317 | __be16 type; | |
318 | int flush = 1; | |
319 | ||
320 | off_gnv = skb_gro_offset(skb); | |
321 | hlen = off_gnv + sizeof(*gh); | |
322 | gh = skb_gro_header_fast(skb, off_gnv); | |
323 | if (skb_gro_header_hard(skb, hlen)) { | |
324 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
325 | if (unlikely(!gh)) | |
326 | goto out; | |
327 | } | |
328 | ||
329 | if (gh->ver != GENEVE_VER || gh->oam) | |
330 | goto out; | |
331 | gh_len = geneve_hlen(gh); | |
332 | ||
333 | hlen = off_gnv + gh_len; | |
334 | if (skb_gro_header_hard(skb, hlen)) { | |
335 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
336 | if (unlikely(!gh)) | |
337 | goto out; | |
338 | } | |
339 | ||
340 | flush = 0; | |
341 | ||
342 | for (p = *head; p; p = p->next) { | |
343 | if (!NAPI_GRO_CB(p)->same_flow) | |
344 | continue; | |
345 | ||
346 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
347 | if (gh->opt_len != gh2->opt_len || | |
348 | memcmp(gh, gh2, gh_len)) { | |
349 | NAPI_GRO_CB(p)->same_flow = 0; | |
350 | continue; | |
351 | } | |
352 | } | |
353 | ||
354 | type = gh->proto_type; | |
355 | ||
356 | rcu_read_lock(); | |
357 | ptype = gro_find_receive_by_type(type); | |
358 | if (!ptype) { | |
359 | flush = 1; | |
360 | goto out_unlock; | |
361 | } | |
362 | ||
363 | skb_gro_pull(skb, gh_len); | |
364 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
365 | pp = ptype->callbacks.gro_receive(head, skb); | |
366 | ||
367 | out_unlock: | |
368 | rcu_read_unlock(); | |
369 | out: | |
370 | NAPI_GRO_CB(skb)->flush |= flush; | |
371 | ||
372 | return pp; | |
373 | } | |
374 | ||
375 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
376 | struct udp_offload *uoff) | |
377 | { | |
378 | struct genevehdr *gh; | |
379 | struct packet_offload *ptype; | |
380 | __be16 type; | |
381 | int gh_len; | |
382 | int err = -ENOSYS; | |
383 | ||
384 | udp_tunnel_gro_complete(skb, nhoff); | |
385 | ||
386 | gh = (struct genevehdr *)(skb->data + nhoff); | |
387 | gh_len = geneve_hlen(gh); | |
388 | type = gh->proto_type; | |
389 | ||
390 | rcu_read_lock(); | |
391 | ptype = gro_find_complete_by_type(type); | |
392 | if (ptype) | |
393 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
394 | ||
395 | rcu_read_unlock(); | |
396 | return err; | |
397 | } | |
398 | ||
399 | /* Create new listen socket if needed */ | |
400 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
401 | bool ipv6) | |
402 | { | |
403 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
404 | struct geneve_sock *gs; | |
405 | struct socket *sock; | |
406 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 407 | int h; |
371bd106 PS |
408 | |
409 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
410 | if (!gs) | |
411 | return ERR_PTR(-ENOMEM); | |
412 | ||
413 | sock = geneve_create_sock(net, ipv6, port); | |
414 | if (IS_ERR(sock)) { | |
415 | kfree(gs); | |
416 | return ERR_CAST(sock); | |
417 | } | |
418 | ||
419 | gs->sock = sock; | |
420 | gs->refcnt = 1; | |
66d47003 PS |
421 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
422 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
423 | |
424 | /* Initialize the geneve udp offloads structure */ | |
425 | gs->udp_offloads.port = port; | |
426 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
427 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
428 | geneve_notify_add_rx_port(gs); | |
429 | ||
430 | /* Mark socket as an encapsulation socket */ | |
431 | tunnel_cfg.sk_user_data = gs; | |
432 | tunnel_cfg.encap_type = 1; | |
433 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
434 | tunnel_cfg.encap_destroy = NULL; | |
435 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
436 | list_add(&gs->list, &gn->sock_list); |
437 | return gs; | |
438 | } | |
439 | ||
440 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
441 | { | |
442 | struct sock *sk = gs->sock->sk; | |
443 | sa_family_t sa_family = sk->sk_family; | |
444 | ||
445 | if (sa_family == AF_INET) | |
446 | udp_del_offload(&gs->udp_offloads); | |
447 | } | |
448 | ||
449 | static void geneve_sock_release(struct geneve_sock *gs) | |
450 | { | |
451 | if (--gs->refcnt) | |
452 | return; | |
453 | ||
454 | list_del(&gs->list); | |
455 | geneve_notify_del_rx_port(gs); | |
456 | udp_tunnel_sock_release(gs->sock); | |
457 | kfree_rcu(gs, rcu); | |
458 | } | |
459 | ||
460 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, | |
461 | __be16 dst_port) | |
462 | { | |
463 | struct geneve_sock *gs; | |
464 | ||
465 | list_for_each_entry(gs, &gn->sock_list, list) { | |
466 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
467 | inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) { | |
468 | return gs; | |
469 | } | |
470 | } | |
471 | return NULL; | |
472 | } | |
473 | ||
2d07dc79 JL |
474 | static int geneve_open(struct net_device *dev) |
475 | { | |
476 | struct geneve_dev *geneve = netdev_priv(dev); | |
477 | struct net *net = geneve->net; | |
371bd106 | 478 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 479 | struct geneve_sock *gs; |
66d47003 | 480 | __u32 hash; |
2d07dc79 | 481 | |
371bd106 PS |
482 | gs = geneve_find_sock(gn, geneve->dst_port); |
483 | if (gs) { | |
484 | gs->refcnt++; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | gs = geneve_socket_create(net, geneve->dst_port, false); | |
2d07dc79 JL |
489 | if (IS_ERR(gs)) |
490 | return PTR_ERR(gs); | |
491 | ||
371bd106 PS |
492 | out: |
493 | gs->collect_md = geneve->collect_md; | |
2d07dc79 | 494 | geneve->sock = gs; |
66d47003 PS |
495 | |
496 | hash = geneve_net_vni_hash(geneve->vni); | |
497 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
498 | return 0; |
499 | } | |
500 | ||
501 | static int geneve_stop(struct net_device *dev) | |
502 | { | |
503 | struct geneve_dev *geneve = netdev_priv(dev); | |
66d47003 | 504 | struct geneve_sock *gs = geneve->sock; |
2d07dc79 | 505 | |
66d47003 PS |
506 | if (!hlist_unhashed(&geneve->hlist)) |
507 | hlist_del_rcu(&geneve->hlist); | |
508 | geneve_sock_release(gs); | |
371bd106 PS |
509 | return 0; |
510 | } | |
511 | ||
512 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, | |
513 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
514 | bool csum) | |
515 | { | |
516 | struct genevehdr *gnvh; | |
517 | int min_headroom; | |
518 | int err; | |
2d07dc79 | 519 | |
371bd106 PS |
520 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
521 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
522 | err = skb_cow_head(skb, min_headroom); | |
523 | if (unlikely(err)) { | |
524 | kfree_skb(skb); | |
525 | goto free_rt; | |
526 | } | |
527 | ||
528 | skb = udp_tunnel_handle_offloads(skb, csum); | |
529 | if (IS_ERR(skb)) { | |
530 | err = PTR_ERR(skb); | |
531 | goto free_rt; | |
532 | } | |
533 | ||
534 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
535 | gnvh->ver = GENEVE_VER; | |
536 | gnvh->opt_len = opt_len / 4; | |
537 | gnvh->oam = !!(tun_flags & TUNNEL_OAM); | |
538 | gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
539 | gnvh->rsvd1 = 0; | |
540 | memcpy(gnvh->vni, vni, 3); | |
541 | gnvh->proto_type = htons(ETH_P_TEB); | |
542 | gnvh->rsvd2 = 0; | |
543 | memcpy(gnvh->options, opt, opt_len); | |
544 | ||
545 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 546 | return 0; |
371bd106 PS |
547 | |
548 | free_rt: | |
549 | ip_rt_put(rt); | |
550 | return err; | |
2d07dc79 JL |
551 | } |
552 | ||
e305ac6c PS |
553 | static struct rtable *geneve_get_rt(struct sk_buff *skb, |
554 | struct net_device *dev, | |
555 | struct flowi4 *fl4, | |
556 | struct ip_tunnel_info *info) | |
557 | { | |
558 | struct geneve_dev *geneve = netdev_priv(dev); | |
559 | struct rtable *rt = NULL; | |
560 | __u8 tos; | |
561 | ||
562 | memset(fl4, 0, sizeof(*fl4)); | |
563 | fl4->flowi4_mark = skb->mark; | |
564 | fl4->flowi4_proto = IPPROTO_UDP; | |
565 | ||
566 | if (info) { | |
567 | fl4->daddr = info->key.u.ipv4.dst; | |
568 | fl4->saddr = info->key.u.ipv4.src; | |
569 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
570 | } else { | |
571 | tos = geneve->tos; | |
572 | if (tos == 1) { | |
573 | const struct iphdr *iip = ip_hdr(skb); | |
574 | ||
575 | tos = ip_tunnel_get_dsfield(iip, skb); | |
576 | } | |
577 | ||
578 | fl4->flowi4_tos = RT_TOS(tos); | |
579 | fl4->daddr = geneve->remote.sin_addr.s_addr; | |
580 | } | |
581 | ||
582 | rt = ip_route_output_key(geneve->net, fl4); | |
583 | if (IS_ERR(rt)) { | |
584 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
585 | dev->stats.tx_carrier_errors++; | |
586 | return rt; | |
587 | } | |
588 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
589 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
590 | dev->stats.collisions++; | |
591 | ip_rt_put(rt); | |
592 | return ERR_PTR(-EINVAL); | |
593 | } | |
e305ac6c PS |
594 | return rt; |
595 | } | |
596 | ||
597 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ | |
598 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
599 | { | |
600 | #ifdef __BIG_ENDIAN | |
601 | vni[0] = (__force __u8)(tun_id >> 16); | |
602 | vni[1] = (__force __u8)(tun_id >> 8); | |
603 | vni[2] = (__force __u8)tun_id; | |
604 | #else | |
605 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
606 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
607 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
608 | #endif | |
609 | } | |
610 | ||
2d07dc79 JL |
611 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
612 | { | |
613 | struct geneve_dev *geneve = netdev_priv(dev); | |
614 | struct geneve_sock *gs = geneve->sock; | |
e305ac6c | 615 | struct ip_tunnel_info *info = NULL; |
2d07dc79 | 616 | struct rtable *rt = NULL; |
2d07dc79 | 617 | struct flowi4 fl4; |
8760ce58 | 618 | __u8 tos, ttl; |
e305ac6c | 619 | __be16 sport; |
371bd106 PS |
620 | bool udp_csum; |
621 | __be16 df; | |
e305ac6c | 622 | int err; |
2d07dc79 | 623 | |
e305ac6c PS |
624 | if (geneve->collect_md) { |
625 | info = skb_tunnel_info(skb); | |
46fa062a | 626 | if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
627 | netdev_dbg(dev, "no tunnel metadata\n"); |
628 | goto tx_error; | |
629 | } | |
630 | } | |
980c394c | 631 | |
e305ac6c | 632 | rt = geneve_get_rt(skb, dev, &fl4, info); |
2d07dc79 JL |
633 | if (IS_ERR(rt)) { |
634 | netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); | |
635 | dev->stats.tx_carrier_errors++; | |
636 | goto tx_error; | |
637 | } | |
371bd106 PS |
638 | |
639 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 640 | skb_reset_mac_header(skb); |
e305ac6c PS |
641 | |
642 | if (info) { | |
643 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
644 | u8 *opts = NULL; |
645 | u8 vni[3]; | |
e305ac6c PS |
646 | |
647 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c PS |
648 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
649 | opts = ip_tunnel_info_opts(info, info->options_len); | |
650 | ||
371bd106 PS |
651 | udp_csum = !!(key->tun_flags & TUNNEL_CSUM); |
652 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, | |
653 | info->options_len, opts, udp_csum); | |
654 | if (unlikely(err)) | |
655 | goto err; | |
656 | ||
657 | tos = key->tos; | |
658 | ttl = key->ttl; | |
659 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 660 | } else { |
371bd106 PS |
661 | const struct iphdr *iip; /* interior IP header */ |
662 | ||
663 | udp_csum = false; | |
664 | err = geneve_build_skb(rt, skb, 0, geneve->vni, | |
665 | 0, NULL, udp_csum); | |
666 | if (unlikely(err)) | |
667 | goto err; | |
668 | ||
e305ac6c PS |
669 | iip = ip_hdr(skb); |
670 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); | |
e305ac6c PS |
671 | ttl = geneve->ttl; |
672 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
673 | ttl = 1; | |
e305ac6c | 674 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 675 | df = 0; |
2d07dc79 | 676 | } |
371bd106 PS |
677 | err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr, |
678 | tos, ttl, df, sport, geneve->dst_port, | |
679 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
680 | !udp_csum); | |
2d07dc79 JL |
681 | |
682 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
2d07dc79 JL |
683 | return NETDEV_TX_OK; |
684 | ||
2d07dc79 | 685 | tx_error: |
2d07dc79 | 686 | dev_kfree_skb(skb); |
371bd106 PS |
687 | err: |
688 | dev->stats.tx_errors++; | |
2d07dc79 JL |
689 | return NETDEV_TX_OK; |
690 | } | |
691 | ||
692 | static const struct net_device_ops geneve_netdev_ops = { | |
693 | .ndo_init = geneve_init, | |
694 | .ndo_uninit = geneve_uninit, | |
695 | .ndo_open = geneve_open, | |
696 | .ndo_stop = geneve_stop, | |
697 | .ndo_start_xmit = geneve_xmit, | |
698 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
699 | .ndo_change_mtu = eth_change_mtu, | |
700 | .ndo_validate_addr = eth_validate_addr, | |
701 | .ndo_set_mac_address = eth_mac_addr, | |
702 | }; | |
703 | ||
704 | static void geneve_get_drvinfo(struct net_device *dev, | |
705 | struct ethtool_drvinfo *drvinfo) | |
706 | { | |
707 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
708 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
709 | } | |
710 | ||
711 | static const struct ethtool_ops geneve_ethtool_ops = { | |
712 | .get_drvinfo = geneve_get_drvinfo, | |
713 | .get_link = ethtool_op_get_link, | |
714 | }; | |
715 | ||
716 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
717 | static struct device_type geneve_type = { | |
718 | .name = "geneve", | |
719 | }; | |
720 | ||
721 | /* Initialize the device structure. */ | |
722 | static void geneve_setup(struct net_device *dev) | |
723 | { | |
724 | ether_setup(dev); | |
725 | ||
726 | dev->netdev_ops = &geneve_netdev_ops; | |
727 | dev->ethtool_ops = &geneve_ethtool_ops; | |
728 | dev->destructor = free_netdev; | |
729 | ||
730 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
731 | ||
2d07dc79 JL |
732 | dev->features |= NETIF_F_LLTX; |
733 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
734 | dev->features |= NETIF_F_RXCSUM; | |
735 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
736 | ||
737 | dev->vlan_features = dev->features; | |
738 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
739 | ||
740 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
741 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
742 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
743 | ||
744 | netif_keep_dst(dev); | |
ed961ac2 | 745 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 746 | eth_hw_addr_random(dev); |
2d07dc79 JL |
747 | } |
748 | ||
749 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
750 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
751 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8760ce58 | 752 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 753 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 754 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 755 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
2d07dc79 JL |
756 | }; |
757 | ||
758 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
759 | { | |
760 | if (tb[IFLA_ADDRESS]) { | |
761 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
762 | return -EINVAL; | |
763 | ||
764 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
765 | return -EADDRNOTAVAIL; | |
766 | } | |
767 | ||
768 | if (!data) | |
769 | return -EINVAL; | |
770 | ||
771 | if (data[IFLA_GENEVE_ID]) { | |
772 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
773 | ||
774 | if (vni >= GENEVE_VID_MASK) | |
775 | return -ERANGE; | |
776 | } | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
371bd106 PS |
781 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
782 | __be16 dst_port, | |
783 | __be32 rem_addr, | |
784 | u8 vni[], | |
785 | bool *tun_on_same_port, | |
786 | bool *tun_collect_md) | |
787 | { | |
788 | struct geneve_dev *geneve, *t; | |
789 | ||
790 | *tun_on_same_port = false; | |
791 | *tun_collect_md = false; | |
792 | t = NULL; | |
793 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
794 | if (geneve->dst_port == dst_port) { | |
795 | *tun_collect_md = geneve->collect_md; | |
796 | *tun_on_same_port = true; | |
797 | } | |
798 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
799 | rem_addr == geneve->remote.sin_addr.s_addr && | |
800 | dst_port == geneve->dst_port) | |
801 | t = geneve; | |
802 | } | |
803 | return t; | |
804 | } | |
805 | ||
e305ac6c PS |
806 | static int geneve_configure(struct net *net, struct net_device *dev, |
807 | __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos, | |
808 | __u16 dst_port, bool metadata) | |
2d07dc79 JL |
809 | { |
810 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
811 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
812 | bool tun_collect_md, tun_on_same_port; | |
2d07dc79 JL |
813 | int err; |
814 | ||
e305ac6c | 815 | if (metadata) { |
371bd106 PS |
816 | if (rem_addr || vni || tos || ttl) |
817 | return -EINVAL; | |
e305ac6c | 818 | } |
2d07dc79 JL |
819 | |
820 | geneve->net = net; | |
821 | geneve->dev = dev; | |
822 | ||
2d07dc79 JL |
823 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
824 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
825 | geneve->vni[2] = vni & 0x000000ff; | |
826 | ||
e305ac6c | 827 | geneve->remote.sin_addr.s_addr = rem_addr; |
2d07dc79 JL |
828 | if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr))) |
829 | return -EINVAL; | |
830 | ||
e305ac6c PS |
831 | geneve->ttl = ttl; |
832 | geneve->tos = tos; | |
833 | geneve->dst_port = htons(dst_port); | |
834 | geneve->collect_md = metadata; | |
835 | ||
371bd106 PS |
836 | t = geneve_find_dev(gn, htons(dst_port), rem_addr, geneve->vni, |
837 | &tun_on_same_port, &tun_collect_md); | |
838 | if (t) | |
839 | return -EBUSY; | |
840 | ||
841 | if (metadata) { | |
842 | if (tun_on_same_port) | |
843 | return -EPERM; | |
844 | } else { | |
845 | if (tun_collect_md) | |
846 | return -EPERM; | |
847 | } | |
848 | ||
2d07dc79 JL |
849 | err = register_netdevice(dev); |
850 | if (err) | |
851 | return err; | |
852 | ||
e305ac6c | 853 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
854 | return 0; |
855 | } | |
856 | ||
857 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
858 | struct nlattr *tb[], struct nlattr *data[]) | |
859 | { | |
860 | __u16 dst_port = GENEVE_UDP_PORT; | |
861 | __u8 ttl = 0, tos = 0; | |
862 | bool metadata = false; | |
863 | __be32 rem_addr; | |
864 | __u32 vni; | |
865 | ||
866 | if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE]) | |
867 | return -EINVAL; | |
868 | ||
869 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
870 | rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
871 | ||
8760ce58 | 872 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 873 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 874 | |
d8951125 | 875 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 876 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 877 | |
e305ac6c PS |
878 | if (data[IFLA_GENEVE_PORT]) |
879 | dst_port = nla_get_u16(data[IFLA_GENEVE_PORT]); | |
2d07dc79 | 880 | |
e305ac6c PS |
881 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
882 | metadata = true; | |
2d07dc79 | 883 | |
e305ac6c PS |
884 | return geneve_configure(net, dev, rem_addr, vni, |
885 | ttl, tos, dst_port, metadata); | |
2d07dc79 JL |
886 | } |
887 | ||
888 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
889 | { | |
890 | struct geneve_dev *geneve = netdev_priv(dev); | |
891 | ||
2d07dc79 JL |
892 | list_del(&geneve->next); |
893 | unregister_netdevice_queue(dev, head); | |
894 | } | |
895 | ||
896 | static size_t geneve_get_size(const struct net_device *dev) | |
897 | { | |
898 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
899 | nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */ | |
8760ce58 | 900 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 901 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
cd7918b3 | 902 | nla_total_size(sizeof(__u16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 903 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
2d07dc79 JL |
904 | 0; |
905 | } | |
906 | ||
907 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
908 | { | |
909 | struct geneve_dev *geneve = netdev_priv(dev); | |
910 | __u32 vni; | |
911 | ||
912 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
913 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
914 | goto nla_put_failure; | |
915 | ||
916 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
917 | geneve->remote.sin_addr.s_addr)) | |
918 | goto nla_put_failure; | |
919 | ||
d8951125 JL |
920 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
921 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
922 | goto nla_put_failure; |
923 | ||
cd7918b3 PS |
924 | if (nla_put_u16(skb, IFLA_GENEVE_PORT, ntohs(geneve->dst_port))) |
925 | goto nla_put_failure; | |
926 | ||
e305ac6c PS |
927 | if (geneve->collect_md) { |
928 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
929 | goto nla_put_failure; | |
930 | } | |
931 | ||
2d07dc79 JL |
932 | return 0; |
933 | ||
934 | nla_put_failure: | |
935 | return -EMSGSIZE; | |
936 | } | |
937 | ||
938 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
939 | .kind = "geneve", | |
940 | .maxtype = IFLA_GENEVE_MAX, | |
941 | .policy = geneve_policy, | |
942 | .priv_size = sizeof(struct geneve_dev), | |
943 | .setup = geneve_setup, | |
944 | .validate = geneve_validate, | |
945 | .newlink = geneve_newlink, | |
946 | .dellink = geneve_dellink, | |
947 | .get_size = geneve_get_size, | |
948 | .fill_info = geneve_fill_info, | |
949 | }; | |
950 | ||
e305ac6c PS |
951 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
952 | u8 name_assign_type, u16 dst_port) | |
953 | { | |
954 | struct nlattr *tb[IFLA_MAX + 1]; | |
955 | struct net_device *dev; | |
956 | int err; | |
957 | ||
958 | memset(tb, 0, sizeof(tb)); | |
959 | dev = rtnl_create_link(net, name, name_assign_type, | |
960 | &geneve_link_ops, tb); | |
961 | if (IS_ERR(dev)) | |
962 | return dev; | |
963 | ||
964 | err = geneve_configure(net, dev, 0, 0, 0, 0, dst_port, true); | |
965 | if (err) { | |
966 | free_netdev(dev); | |
967 | return ERR_PTR(err); | |
968 | } | |
969 | return dev; | |
970 | } | |
971 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
972 | ||
2d07dc79 JL |
973 | static __net_init int geneve_init_net(struct net *net) |
974 | { | |
975 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
976 | |
977 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 978 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
979 | return 0; |
980 | } | |
981 | ||
982 | static void __net_exit geneve_exit_net(struct net *net) | |
983 | { | |
984 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
985 | struct geneve_dev *geneve, *next; | |
986 | struct net_device *dev, *aux; | |
987 | LIST_HEAD(list); | |
988 | ||
989 | rtnl_lock(); | |
990 | ||
991 | /* gather any geneve devices that were moved into this ns */ | |
992 | for_each_netdev_safe(net, dev, aux) | |
993 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
994 | unregister_netdevice_queue(dev, &list); | |
995 | ||
996 | /* now gather any other geneve devices that were created in this ns */ | |
997 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
998 | /* If geneve->dev is in the same netns, it was already added | |
999 | * to the list by the previous loop. | |
1000 | */ | |
1001 | if (!net_eq(dev_net(geneve->dev), net)) | |
1002 | unregister_netdevice_queue(geneve->dev, &list); | |
1003 | } | |
1004 | ||
1005 | /* unregister the devices gathered above */ | |
1006 | unregister_netdevice_many(&list); | |
1007 | rtnl_unlock(); | |
1008 | } | |
1009 | ||
1010 | static struct pernet_operations geneve_net_ops = { | |
1011 | .init = geneve_init_net, | |
1012 | .exit = geneve_exit_net, | |
1013 | .id = &geneve_net_id, | |
1014 | .size = sizeof(struct geneve_net), | |
1015 | }; | |
1016 | ||
1017 | static int __init geneve_init_module(void) | |
1018 | { | |
1019 | int rc; | |
1020 | ||
1021 | rc = register_pernet_subsys(&geneve_net_ops); | |
1022 | if (rc) | |
1023 | goto out1; | |
1024 | ||
1025 | rc = rtnl_link_register(&geneve_link_ops); | |
1026 | if (rc) | |
1027 | goto out2; | |
1028 | ||
1029 | return 0; | |
1030 | out2: | |
1031 | unregister_pernet_subsys(&geneve_net_ops); | |
1032 | out1: | |
1033 | return rc; | |
1034 | } | |
1035 | late_initcall(geneve_init_module); | |
1036 | ||
1037 | static void __exit geneve_cleanup_module(void) | |
1038 | { | |
1039 | rtnl_link_unregister(&geneve_link_ops); | |
1040 | unregister_pernet_subsys(&geneve_net_ops); | |
1041 | } | |
1042 | module_exit(geneve_cleanup_module); | |
1043 | ||
1044 | MODULE_LICENSE("GPL"); | |
1045 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1046 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1047 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1048 | MODULE_ALIAS_RTNL_LINK("geneve"); |