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 PS |
42 | struct list_head geneve_list; |
43 | struct hlist_head vni_list[VNI_HASH_SIZE]; | |
44 | struct list_head sock_list; | |
2d07dc79 JL |
45 | }; |
46 | ||
371bd106 PS |
47 | static int geneve_net_id; |
48 | ||
2d07dc79 JL |
49 | /* Pseudo network device */ |
50 | struct geneve_dev { | |
51 | struct hlist_node hlist; /* vni hash table */ | |
52 | struct net *net; /* netns for packet i/o */ | |
53 | struct net_device *dev; /* netdev for geneve tunnel */ | |
54 | struct geneve_sock *sock; /* socket used for geneve tunnel */ | |
8760ce58 JL |
55 | u8 vni[3]; /* virtual network ID for tunnel */ |
56 | u8 ttl; /* TTL override */ | |
d8951125 | 57 | u8 tos; /* TOS override */ |
2d07dc79 JL |
58 | struct sockaddr_in remote; /* IPv4 address for link partner */ |
59 | struct list_head next; /* geneve's per namespace list */ | |
cd7918b3 | 60 | __be16 dst_port; |
e305ac6c | 61 | bool collect_md; |
2d07dc79 JL |
62 | }; |
63 | ||
371bd106 PS |
64 | struct geneve_sock { |
65 | bool collect_md; | |
66 | struct geneve_net *gn; | |
67 | struct list_head list; | |
68 | struct socket *sock; | |
69 | struct rcu_head rcu; | |
70 | int refcnt; | |
71 | struct udp_offload udp_offloads; | |
72 | }; | |
2d07dc79 JL |
73 | |
74 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
75 | { | |
76 | __u32 vnid; | |
77 | ||
78 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
79 | return hash_32(vnid, VNI_HASH_BITS); | |
80 | } | |
81 | ||
e305ac6c PS |
82 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
83 | { | |
84 | #ifdef __BIG_ENDIAN | |
85 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
86 | #else | |
87 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
88 | ((__force u64)vni[1] << 48) | | |
89 | ((__force u64)vni[2] << 56)); | |
90 | #endif | |
91 | } | |
92 | ||
371bd106 PS |
93 | static struct geneve_dev *geneve_lookup(struct geneve_net *gn, __be16 port, |
94 | __be32 addr, u8 vni[]) | |
2d07dc79 | 95 | { |
2d07dc79 | 96 | struct hlist_head *vni_list_head; |
e305ac6c | 97 | struct geneve_dev *geneve; |
2d07dc79 JL |
98 | __u32 hash; |
99 | ||
2d07dc79 | 100 | /* Find the device for this VNI */ |
371bd106 | 101 | hash = geneve_net_vni_hash(vni); |
2d07dc79 | 102 | vni_list_head = &gn->vni_list[hash]; |
e305ac6c | 103 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 PS |
104 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
105 | addr == geneve->remote.sin_addr.s_addr && | |
106 | port == geneve->dst_port) { | |
e305ac6c | 107 | return geneve; |
2d07dc79 JL |
108 | } |
109 | } | |
e305ac6c PS |
110 | return NULL; |
111 | } | |
112 | ||
371bd106 PS |
113 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
114 | { | |
115 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
116 | } | |
117 | ||
e305ac6c PS |
118 | /* geneve receive/decap routine */ |
119 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
120 | { | |
371bd106 | 121 | struct inet_sock *sk = inet_sk(gs->sock->sk); |
e305ac6c | 122 | struct genevehdr *gnvh = geneve_hdr(skb); |
371bd106 | 123 | struct geneve_net *gn = gs->gn; |
e305ac6c PS |
124 | struct metadata_dst *tun_dst = NULL; |
125 | struct geneve_dev *geneve = NULL; | |
126 | struct pcpu_sw_netstats *stats; | |
e305ac6c | 127 | struct iphdr *iph; |
371bd106 PS |
128 | u8 *vni; |
129 | __be32 addr; | |
e305ac6c PS |
130 | int err; |
131 | ||
132 | iph = ip_hdr(skb); /* Still outer IP header... */ | |
371bd106 PS |
133 | |
134 | if (gs->collect_md) { | |
135 | static u8 zero_vni[3]; | |
136 | ||
137 | vni = zero_vni; | |
138 | addr = 0; | |
139 | } else { | |
140 | vni = gnvh->vni; | |
141 | addr = iph->saddr; | |
142 | } | |
143 | ||
144 | geneve = geneve_lookup(gn, sk->inet_sport, addr, vni); | |
2d07dc79 JL |
145 | if (!geneve) |
146 | goto drop; | |
147 | ||
371bd106 | 148 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c PS |
149 | __be16 flags; |
150 | void *opts; | |
151 | ||
152 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
153 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
154 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
155 | ||
156 | tun_dst = udp_tun_rx_dst(skb, AF_INET, flags, | |
157 | vni_to_tunnel_id(gnvh->vni), | |
158 | gnvh->opt_len * 4); | |
159 | if (!tun_dst) | |
160 | goto drop; | |
161 | ||
162 | /* Update tunnel dst according to Geneve options. */ | |
163 | opts = ip_tunnel_info_opts(&tun_dst->u.tun_info, | |
164 | gnvh->opt_len * 4); | |
165 | memcpy(opts, gnvh->options, gnvh->opt_len * 4); | |
166 | } else { | |
167 | /* Drop packets w/ critical options, | |
168 | * since we don't support any... | |
169 | */ | |
170 | if (gnvh->critical) | |
171 | goto drop; | |
172 | } | |
2d07dc79 JL |
173 | |
174 | skb_reset_mac_header(skb); | |
175 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
176 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
177 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
178 | ||
e305ac6c PS |
179 | if (tun_dst) |
180 | skb_dst_set(skb, &tun_dst->dst); | |
181 | ||
2d07dc79 JL |
182 | /* Ignore packet loops (and multicast echo) */ |
183 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
184 | goto drop; | |
185 | ||
186 | skb_reset_network_header(skb); | |
187 | ||
188 | iph = ip_hdr(skb); /* Now inner IP header... */ | |
189 | err = IP_ECN_decapsulate(iph, skb); | |
190 | ||
191 | if (unlikely(err)) { | |
192 | if (log_ecn_error) | |
193 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
194 | &iph->saddr, iph->tos); | |
195 | if (err > 1) { | |
196 | ++geneve->dev->stats.rx_frame_errors; | |
197 | ++geneve->dev->stats.rx_errors; | |
198 | goto drop; | |
199 | } | |
200 | } | |
201 | ||
202 | stats = this_cpu_ptr(geneve->dev->tstats); | |
203 | u64_stats_update_begin(&stats->syncp); | |
204 | stats->rx_packets++; | |
205 | stats->rx_bytes += skb->len; | |
206 | u64_stats_update_end(&stats->syncp); | |
207 | ||
208 | netif_rx(skb); | |
2d07dc79 JL |
209 | return; |
210 | drop: | |
211 | /* Consume bad packet */ | |
212 | kfree_skb(skb); | |
213 | } | |
214 | ||
215 | /* Setup stats when device is created */ | |
216 | static int geneve_init(struct net_device *dev) | |
217 | { | |
218 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
219 | if (!dev->tstats) | |
220 | return -ENOMEM; | |
2d07dc79 JL |
221 | return 0; |
222 | } | |
223 | ||
224 | static void geneve_uninit(struct net_device *dev) | |
225 | { | |
226 | free_percpu(dev->tstats); | |
227 | } | |
228 | ||
371bd106 PS |
229 | /* Callback from net/ipv4/udp.c to receive packets */ |
230 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
231 | { | |
232 | struct genevehdr *geneveh; | |
233 | struct geneve_sock *gs; | |
234 | int opts_len; | |
235 | ||
236 | /* Need Geneve and inner Ethernet header to be present */ | |
237 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
238 | goto error; | |
239 | ||
240 | /* Return packets with reserved bits set */ | |
241 | geneveh = geneve_hdr(skb); | |
242 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
243 | goto error; | |
244 | ||
245 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
246 | goto error; | |
247 | ||
248 | opts_len = geneveh->opt_len * 4; | |
249 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
250 | htons(ETH_P_TEB))) | |
251 | goto drop; | |
252 | ||
253 | gs = rcu_dereference_sk_user_data(sk); | |
254 | if (!gs) | |
255 | goto drop; | |
256 | ||
257 | geneve_rx(gs, skb); | |
258 | return 0; | |
259 | ||
260 | drop: | |
261 | /* Consume bad packet */ | |
262 | kfree_skb(skb); | |
263 | return 0; | |
264 | ||
265 | error: | |
266 | /* Let the UDP layer deal with the skb */ | |
267 | return 1; | |
268 | } | |
269 | ||
270 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
271 | __be16 port) | |
272 | { | |
273 | struct socket *sock; | |
274 | struct udp_port_cfg udp_conf; | |
275 | int err; | |
276 | ||
277 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
278 | ||
279 | if (ipv6) { | |
280 | udp_conf.family = AF_INET6; | |
281 | } else { | |
282 | udp_conf.family = AF_INET; | |
283 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
284 | } | |
285 | ||
286 | udp_conf.local_udp_port = port; | |
287 | ||
288 | /* Open UDP socket */ | |
289 | err = udp_sock_create(net, &udp_conf, &sock); | |
290 | if (err < 0) | |
291 | return ERR_PTR(err); | |
292 | ||
293 | return sock; | |
294 | } | |
295 | ||
296 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
297 | { | |
298 | struct sock *sk = gs->sock->sk; | |
299 | sa_family_t sa_family = sk->sk_family; | |
300 | int err; | |
301 | ||
302 | if (sa_family == AF_INET) { | |
303 | err = udp_add_offload(&gs->udp_offloads); | |
304 | if (err) | |
305 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
306 | err); | |
307 | } | |
308 | } | |
309 | ||
310 | static int geneve_hlen(struct genevehdr *gh) | |
311 | { | |
312 | return sizeof(*gh) + gh->opt_len * 4; | |
313 | } | |
314 | ||
315 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
316 | struct sk_buff *skb, | |
317 | struct udp_offload *uoff) | |
318 | { | |
319 | struct sk_buff *p, **pp = NULL; | |
320 | struct genevehdr *gh, *gh2; | |
321 | unsigned int hlen, gh_len, off_gnv; | |
322 | const struct packet_offload *ptype; | |
323 | __be16 type; | |
324 | int flush = 1; | |
325 | ||
326 | off_gnv = skb_gro_offset(skb); | |
327 | hlen = off_gnv + sizeof(*gh); | |
328 | gh = skb_gro_header_fast(skb, off_gnv); | |
329 | if (skb_gro_header_hard(skb, hlen)) { | |
330 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
331 | if (unlikely(!gh)) | |
332 | goto out; | |
333 | } | |
334 | ||
335 | if (gh->ver != GENEVE_VER || gh->oam) | |
336 | goto out; | |
337 | gh_len = geneve_hlen(gh); | |
338 | ||
339 | hlen = off_gnv + gh_len; | |
340 | if (skb_gro_header_hard(skb, hlen)) { | |
341 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
342 | if (unlikely(!gh)) | |
343 | goto out; | |
344 | } | |
345 | ||
346 | flush = 0; | |
347 | ||
348 | for (p = *head; p; p = p->next) { | |
349 | if (!NAPI_GRO_CB(p)->same_flow) | |
350 | continue; | |
351 | ||
352 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
353 | if (gh->opt_len != gh2->opt_len || | |
354 | memcmp(gh, gh2, gh_len)) { | |
355 | NAPI_GRO_CB(p)->same_flow = 0; | |
356 | continue; | |
357 | } | |
358 | } | |
359 | ||
360 | type = gh->proto_type; | |
361 | ||
362 | rcu_read_lock(); | |
363 | ptype = gro_find_receive_by_type(type); | |
364 | if (!ptype) { | |
365 | flush = 1; | |
366 | goto out_unlock; | |
367 | } | |
368 | ||
369 | skb_gro_pull(skb, gh_len); | |
370 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
371 | pp = ptype->callbacks.gro_receive(head, skb); | |
372 | ||
373 | out_unlock: | |
374 | rcu_read_unlock(); | |
375 | out: | |
376 | NAPI_GRO_CB(skb)->flush |= flush; | |
377 | ||
378 | return pp; | |
379 | } | |
380 | ||
381 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
382 | struct udp_offload *uoff) | |
383 | { | |
384 | struct genevehdr *gh; | |
385 | struct packet_offload *ptype; | |
386 | __be16 type; | |
387 | int gh_len; | |
388 | int err = -ENOSYS; | |
389 | ||
390 | udp_tunnel_gro_complete(skb, nhoff); | |
391 | ||
392 | gh = (struct genevehdr *)(skb->data + nhoff); | |
393 | gh_len = geneve_hlen(gh); | |
394 | type = gh->proto_type; | |
395 | ||
396 | rcu_read_lock(); | |
397 | ptype = gro_find_complete_by_type(type); | |
398 | if (ptype) | |
399 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
400 | ||
401 | rcu_read_unlock(); | |
402 | return err; | |
403 | } | |
404 | ||
405 | /* Create new listen socket if needed */ | |
406 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
407 | bool ipv6) | |
408 | { | |
409 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
410 | struct geneve_sock *gs; | |
411 | struct socket *sock; | |
412 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
413 | ||
414 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
415 | if (!gs) | |
416 | return ERR_PTR(-ENOMEM); | |
417 | ||
418 | sock = geneve_create_sock(net, ipv6, port); | |
419 | if (IS_ERR(sock)) { | |
420 | kfree(gs); | |
421 | return ERR_CAST(sock); | |
422 | } | |
423 | ||
424 | gs->sock = sock; | |
425 | gs->refcnt = 1; | |
426 | gs->gn = gn; | |
427 | ||
428 | /* Initialize the geneve udp offloads structure */ | |
429 | gs->udp_offloads.port = port; | |
430 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
431 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
432 | geneve_notify_add_rx_port(gs); | |
433 | ||
434 | /* Mark socket as an encapsulation socket */ | |
435 | tunnel_cfg.sk_user_data = gs; | |
436 | tunnel_cfg.encap_type = 1; | |
437 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
438 | tunnel_cfg.encap_destroy = NULL; | |
439 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
440 | ||
441 | list_add(&gs->list, &gn->sock_list); | |
442 | return gs; | |
443 | } | |
444 | ||
445 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
446 | { | |
447 | struct sock *sk = gs->sock->sk; | |
448 | sa_family_t sa_family = sk->sk_family; | |
449 | ||
450 | if (sa_family == AF_INET) | |
451 | udp_del_offload(&gs->udp_offloads); | |
452 | } | |
453 | ||
454 | static void geneve_sock_release(struct geneve_sock *gs) | |
455 | { | |
456 | if (--gs->refcnt) | |
457 | return; | |
458 | ||
459 | list_del(&gs->list); | |
460 | geneve_notify_del_rx_port(gs); | |
461 | udp_tunnel_sock_release(gs->sock); | |
462 | kfree_rcu(gs, rcu); | |
463 | } | |
464 | ||
465 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, | |
466 | __be16 dst_port) | |
467 | { | |
468 | struct geneve_sock *gs; | |
469 | ||
470 | list_for_each_entry(gs, &gn->sock_list, list) { | |
471 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
472 | inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) { | |
473 | return gs; | |
474 | } | |
475 | } | |
476 | return NULL; | |
477 | } | |
478 | ||
2d07dc79 JL |
479 | static int geneve_open(struct net_device *dev) |
480 | { | |
481 | struct geneve_dev *geneve = netdev_priv(dev); | |
482 | struct net *net = geneve->net; | |
371bd106 | 483 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 JL |
484 | struct geneve_sock *gs; |
485 | ||
371bd106 PS |
486 | gs = geneve_find_sock(gn, geneve->dst_port); |
487 | if (gs) { | |
488 | gs->refcnt++; | |
489 | goto out; | |
490 | } | |
491 | ||
492 | gs = geneve_socket_create(net, geneve->dst_port, false); | |
2d07dc79 JL |
493 | if (IS_ERR(gs)) |
494 | return PTR_ERR(gs); | |
495 | ||
371bd106 PS |
496 | out: |
497 | gs->collect_md = geneve->collect_md; | |
2d07dc79 | 498 | geneve->sock = gs; |
2d07dc79 JL |
499 | return 0; |
500 | } | |
501 | ||
502 | static int geneve_stop(struct net_device *dev) | |
503 | { | |
504 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 505 | |
371bd106 PS |
506 | geneve_sock_release(geneve->sock); |
507 | return 0; | |
508 | } | |
509 | ||
510 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, | |
511 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
512 | bool csum) | |
513 | { | |
514 | struct genevehdr *gnvh; | |
515 | int min_headroom; | |
516 | int err; | |
2d07dc79 | 517 | |
371bd106 PS |
518 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
519 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
520 | err = skb_cow_head(skb, min_headroom); | |
521 | if (unlikely(err)) { | |
522 | kfree_skb(skb); | |
523 | goto free_rt; | |
524 | } | |
525 | ||
526 | skb = udp_tunnel_handle_offloads(skb, csum); | |
527 | if (IS_ERR(skb)) { | |
528 | err = PTR_ERR(skb); | |
529 | goto free_rt; | |
530 | } | |
531 | ||
532 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
533 | gnvh->ver = GENEVE_VER; | |
534 | gnvh->opt_len = opt_len / 4; | |
535 | gnvh->oam = !!(tun_flags & TUNNEL_OAM); | |
536 | gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
537 | gnvh->rsvd1 = 0; | |
538 | memcpy(gnvh->vni, vni, 3); | |
539 | gnvh->proto_type = htons(ETH_P_TEB); | |
540 | gnvh->rsvd2 = 0; | |
541 | memcpy(gnvh->options, opt, opt_len); | |
542 | ||
543 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 544 | return 0; |
371bd106 PS |
545 | |
546 | free_rt: | |
547 | ip_rt_put(rt); | |
548 | return err; | |
2d07dc79 JL |
549 | } |
550 | ||
e305ac6c PS |
551 | static struct rtable *geneve_get_rt(struct sk_buff *skb, |
552 | struct net_device *dev, | |
553 | struct flowi4 *fl4, | |
554 | struct ip_tunnel_info *info) | |
555 | { | |
556 | struct geneve_dev *geneve = netdev_priv(dev); | |
557 | struct rtable *rt = NULL; | |
558 | __u8 tos; | |
559 | ||
560 | memset(fl4, 0, sizeof(*fl4)); | |
561 | fl4->flowi4_mark = skb->mark; | |
562 | fl4->flowi4_proto = IPPROTO_UDP; | |
563 | ||
564 | if (info) { | |
565 | fl4->daddr = info->key.u.ipv4.dst; | |
566 | fl4->saddr = info->key.u.ipv4.src; | |
567 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
568 | } else { | |
569 | tos = geneve->tos; | |
570 | if (tos == 1) { | |
571 | const struct iphdr *iip = ip_hdr(skb); | |
572 | ||
573 | tos = ip_tunnel_get_dsfield(iip, skb); | |
574 | } | |
575 | ||
576 | fl4->flowi4_tos = RT_TOS(tos); | |
577 | fl4->daddr = geneve->remote.sin_addr.s_addr; | |
578 | } | |
579 | ||
580 | rt = ip_route_output_key(geneve->net, fl4); | |
581 | if (IS_ERR(rt)) { | |
582 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
583 | dev->stats.tx_carrier_errors++; | |
584 | return rt; | |
585 | } | |
586 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
587 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
588 | dev->stats.collisions++; | |
589 | ip_rt_put(rt); | |
590 | return ERR_PTR(-EINVAL); | |
591 | } | |
e305ac6c PS |
592 | return rt; |
593 | } | |
594 | ||
595 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ | |
596 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
597 | { | |
598 | #ifdef __BIG_ENDIAN | |
599 | vni[0] = (__force __u8)(tun_id >> 16); | |
600 | vni[1] = (__force __u8)(tun_id >> 8); | |
601 | vni[2] = (__force __u8)tun_id; | |
602 | #else | |
603 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
604 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
605 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
606 | #endif | |
607 | } | |
608 | ||
2d07dc79 JL |
609 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
610 | { | |
611 | struct geneve_dev *geneve = netdev_priv(dev); | |
612 | struct geneve_sock *gs = geneve->sock; | |
e305ac6c | 613 | struct ip_tunnel_info *info = NULL; |
2d07dc79 | 614 | struct rtable *rt = NULL; |
2d07dc79 | 615 | struct flowi4 fl4; |
8760ce58 | 616 | __u8 tos, ttl; |
e305ac6c | 617 | __be16 sport; |
371bd106 PS |
618 | bool udp_csum; |
619 | __be16 df; | |
e305ac6c | 620 | int err; |
2d07dc79 | 621 | |
e305ac6c PS |
622 | if (geneve->collect_md) { |
623 | info = skb_tunnel_info(skb); | |
624 | if (unlikely(info && info->mode != IP_TUNNEL_INFO_TX)) { | |
625 | netdev_dbg(dev, "no tunnel metadata\n"); | |
626 | goto tx_error; | |
627 | } | |
628 | } | |
980c394c | 629 | |
e305ac6c | 630 | rt = geneve_get_rt(skb, dev, &fl4, info); |
2d07dc79 JL |
631 | if (IS_ERR(rt)) { |
632 | netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); | |
633 | dev->stats.tx_carrier_errors++; | |
634 | goto tx_error; | |
635 | } | |
371bd106 PS |
636 | |
637 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 638 | skb_reset_mac_header(skb); |
e305ac6c PS |
639 | |
640 | if (info) { | |
641 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
642 | u8 *opts = NULL; |
643 | u8 vni[3]; | |
e305ac6c PS |
644 | |
645 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c PS |
646 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
647 | opts = ip_tunnel_info_opts(info, info->options_len); | |
648 | ||
371bd106 PS |
649 | udp_csum = !!(key->tun_flags & TUNNEL_CSUM); |
650 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, | |
651 | info->options_len, opts, udp_csum); | |
652 | if (unlikely(err)) | |
653 | goto err; | |
654 | ||
655 | tos = key->tos; | |
656 | ttl = key->ttl; | |
657 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 658 | } else { |
371bd106 PS |
659 | const struct iphdr *iip; /* interior IP header */ |
660 | ||
661 | udp_csum = false; | |
662 | err = geneve_build_skb(rt, skb, 0, geneve->vni, | |
663 | 0, NULL, udp_csum); | |
664 | if (unlikely(err)) | |
665 | goto err; | |
666 | ||
e305ac6c PS |
667 | iip = ip_hdr(skb); |
668 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); | |
e305ac6c PS |
669 | ttl = geneve->ttl; |
670 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
671 | ttl = 1; | |
e305ac6c | 672 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 673 | df = 0; |
2d07dc79 | 674 | } |
371bd106 PS |
675 | err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr, |
676 | tos, ttl, df, sport, geneve->dst_port, | |
677 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
678 | !udp_csum); | |
2d07dc79 JL |
679 | |
680 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
2d07dc79 JL |
681 | return NETDEV_TX_OK; |
682 | ||
2d07dc79 | 683 | tx_error: |
2d07dc79 | 684 | dev_kfree_skb(skb); |
371bd106 PS |
685 | err: |
686 | dev->stats.tx_errors++; | |
2d07dc79 JL |
687 | return NETDEV_TX_OK; |
688 | } | |
689 | ||
690 | static const struct net_device_ops geneve_netdev_ops = { | |
691 | .ndo_init = geneve_init, | |
692 | .ndo_uninit = geneve_uninit, | |
693 | .ndo_open = geneve_open, | |
694 | .ndo_stop = geneve_stop, | |
695 | .ndo_start_xmit = geneve_xmit, | |
696 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
697 | .ndo_change_mtu = eth_change_mtu, | |
698 | .ndo_validate_addr = eth_validate_addr, | |
699 | .ndo_set_mac_address = eth_mac_addr, | |
700 | }; | |
701 | ||
702 | static void geneve_get_drvinfo(struct net_device *dev, | |
703 | struct ethtool_drvinfo *drvinfo) | |
704 | { | |
705 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
706 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
707 | } | |
708 | ||
709 | static const struct ethtool_ops geneve_ethtool_ops = { | |
710 | .get_drvinfo = geneve_get_drvinfo, | |
711 | .get_link = ethtool_op_get_link, | |
712 | }; | |
713 | ||
714 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
715 | static struct device_type geneve_type = { | |
716 | .name = "geneve", | |
717 | }; | |
718 | ||
719 | /* Initialize the device structure. */ | |
720 | static void geneve_setup(struct net_device *dev) | |
721 | { | |
722 | ether_setup(dev); | |
723 | ||
724 | dev->netdev_ops = &geneve_netdev_ops; | |
725 | dev->ethtool_ops = &geneve_ethtool_ops; | |
726 | dev->destructor = free_netdev; | |
727 | ||
728 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
729 | ||
2d07dc79 JL |
730 | dev->features |= NETIF_F_LLTX; |
731 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
732 | dev->features |= NETIF_F_RXCSUM; | |
733 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
734 | ||
735 | dev->vlan_features = dev->features; | |
736 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
737 | ||
738 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
739 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
740 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
741 | ||
742 | netif_keep_dst(dev); | |
ed961ac2 | 743 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 744 | eth_hw_addr_random(dev); |
2d07dc79 JL |
745 | } |
746 | ||
747 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
748 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
749 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8760ce58 | 750 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 751 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 752 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 753 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
2d07dc79 JL |
754 | }; |
755 | ||
756 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
757 | { | |
758 | if (tb[IFLA_ADDRESS]) { | |
759 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
760 | return -EINVAL; | |
761 | ||
762 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
763 | return -EADDRNOTAVAIL; | |
764 | } | |
765 | ||
766 | if (!data) | |
767 | return -EINVAL; | |
768 | ||
769 | if (data[IFLA_GENEVE_ID]) { | |
770 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
771 | ||
772 | if (vni >= GENEVE_VID_MASK) | |
773 | return -ERANGE; | |
774 | } | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
371bd106 PS |
779 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
780 | __be16 dst_port, | |
781 | __be32 rem_addr, | |
782 | u8 vni[], | |
783 | bool *tun_on_same_port, | |
784 | bool *tun_collect_md) | |
785 | { | |
786 | struct geneve_dev *geneve, *t; | |
787 | ||
788 | *tun_on_same_port = false; | |
789 | *tun_collect_md = false; | |
790 | t = NULL; | |
791 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
792 | if (geneve->dst_port == dst_port) { | |
793 | *tun_collect_md = geneve->collect_md; | |
794 | *tun_on_same_port = true; | |
795 | } | |
796 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
797 | rem_addr == geneve->remote.sin_addr.s_addr && | |
798 | dst_port == geneve->dst_port) | |
799 | t = geneve; | |
800 | } | |
801 | return t; | |
802 | } | |
803 | ||
e305ac6c PS |
804 | static int geneve_configure(struct net *net, struct net_device *dev, |
805 | __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos, | |
806 | __u16 dst_port, bool metadata) | |
2d07dc79 JL |
807 | { |
808 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
809 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
810 | bool tun_collect_md, tun_on_same_port; | |
e305ac6c | 811 | __u32 hash; |
2d07dc79 JL |
812 | int err; |
813 | ||
e305ac6c | 814 | if (metadata) { |
371bd106 PS |
815 | if (rem_addr || vni || tos || ttl) |
816 | return -EINVAL; | |
e305ac6c | 817 | } |
2d07dc79 JL |
818 | |
819 | geneve->net = net; | |
820 | geneve->dev = dev; | |
821 | ||
2d07dc79 JL |
822 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
823 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
824 | geneve->vni[2] = vni & 0x000000ff; | |
825 | ||
e305ac6c | 826 | geneve->remote.sin_addr.s_addr = rem_addr; |
2d07dc79 JL |
827 | if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr))) |
828 | return -EINVAL; | |
829 | ||
e305ac6c PS |
830 | geneve->ttl = ttl; |
831 | geneve->tos = tos; | |
832 | geneve->dst_port = htons(dst_port); | |
833 | geneve->collect_md = metadata; | |
834 | ||
371bd106 PS |
835 | t = geneve_find_dev(gn, htons(dst_port), rem_addr, geneve->vni, |
836 | &tun_on_same_port, &tun_collect_md); | |
837 | if (t) | |
838 | return -EBUSY; | |
839 | ||
840 | if (metadata) { | |
841 | if (tun_on_same_port) | |
842 | return -EPERM; | |
843 | } else { | |
844 | if (tun_collect_md) | |
845 | return -EPERM; | |
846 | } | |
847 | ||
2d07dc79 JL |
848 | err = register_netdevice(dev); |
849 | if (err) | |
850 | return err; | |
851 | ||
e305ac6c | 852 | list_add(&geneve->next, &gn->geneve_list); |
371bd106 | 853 | hash = geneve_net_vni_hash(geneve->vni); |
e305ac6c | 854 | hlist_add_head_rcu(&geneve->hlist, &gn->vni_list[hash]); |
e305ac6c PS |
855 | return 0; |
856 | } | |
857 | ||
858 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
859 | struct nlattr *tb[], struct nlattr *data[]) | |
860 | { | |
861 | __u16 dst_port = GENEVE_UDP_PORT; | |
862 | __u8 ttl = 0, tos = 0; | |
863 | bool metadata = false; | |
864 | __be32 rem_addr; | |
865 | __u32 vni; | |
866 | ||
867 | if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE]) | |
868 | return -EINVAL; | |
869 | ||
870 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
871 | rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
872 | ||
8760ce58 | 873 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 874 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 875 | |
d8951125 | 876 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 877 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 878 | |
e305ac6c PS |
879 | if (data[IFLA_GENEVE_PORT]) |
880 | dst_port = nla_get_u16(data[IFLA_GENEVE_PORT]); | |
2d07dc79 | 881 | |
e305ac6c PS |
882 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
883 | metadata = true; | |
2d07dc79 | 884 | |
e305ac6c PS |
885 | return geneve_configure(net, dev, rem_addr, vni, |
886 | ttl, tos, dst_port, metadata); | |
2d07dc79 JL |
887 | } |
888 | ||
889 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
890 | { | |
891 | struct geneve_dev *geneve = netdev_priv(dev); | |
892 | ||
893 | if (!hlist_unhashed(&geneve->hlist)) | |
894 | hlist_del_rcu(&geneve->hlist); | |
895 | ||
896 | list_del(&geneve->next); | |
897 | unregister_netdevice_queue(dev, head); | |
898 | } | |
899 | ||
900 | static size_t geneve_get_size(const struct net_device *dev) | |
901 | { | |
902 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
903 | nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */ | |
8760ce58 | 904 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 905 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
cd7918b3 | 906 | nla_total_size(sizeof(__u16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 907 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
2d07dc79 JL |
908 | 0; |
909 | } | |
910 | ||
911 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
912 | { | |
913 | struct geneve_dev *geneve = netdev_priv(dev); | |
914 | __u32 vni; | |
915 | ||
916 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
917 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
918 | goto nla_put_failure; | |
919 | ||
920 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
921 | geneve->remote.sin_addr.s_addr)) | |
922 | goto nla_put_failure; | |
923 | ||
d8951125 JL |
924 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
925 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
926 | goto nla_put_failure; |
927 | ||
cd7918b3 PS |
928 | if (nla_put_u16(skb, IFLA_GENEVE_PORT, ntohs(geneve->dst_port))) |
929 | goto nla_put_failure; | |
930 | ||
e305ac6c PS |
931 | if (geneve->collect_md) { |
932 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
933 | goto nla_put_failure; | |
934 | } | |
935 | ||
2d07dc79 JL |
936 | return 0; |
937 | ||
938 | nla_put_failure: | |
939 | return -EMSGSIZE; | |
940 | } | |
941 | ||
942 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
943 | .kind = "geneve", | |
944 | .maxtype = IFLA_GENEVE_MAX, | |
945 | .policy = geneve_policy, | |
946 | .priv_size = sizeof(struct geneve_dev), | |
947 | .setup = geneve_setup, | |
948 | .validate = geneve_validate, | |
949 | .newlink = geneve_newlink, | |
950 | .dellink = geneve_dellink, | |
951 | .get_size = geneve_get_size, | |
952 | .fill_info = geneve_fill_info, | |
953 | }; | |
954 | ||
e305ac6c PS |
955 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
956 | u8 name_assign_type, u16 dst_port) | |
957 | { | |
958 | struct nlattr *tb[IFLA_MAX + 1]; | |
959 | struct net_device *dev; | |
960 | int err; | |
961 | ||
962 | memset(tb, 0, sizeof(tb)); | |
963 | dev = rtnl_create_link(net, name, name_assign_type, | |
964 | &geneve_link_ops, tb); | |
965 | if (IS_ERR(dev)) | |
966 | return dev; | |
967 | ||
968 | err = geneve_configure(net, dev, 0, 0, 0, 0, dst_port, true); | |
969 | if (err) { | |
970 | free_netdev(dev); | |
971 | return ERR_PTR(err); | |
972 | } | |
973 | return dev; | |
974 | } | |
975 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
976 | ||
2d07dc79 JL |
977 | static __net_init int geneve_init_net(struct net *net) |
978 | { | |
979 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
980 | unsigned int h; | |
981 | ||
982 | INIT_LIST_HEAD(&gn->geneve_list); | |
983 | ||
371bd106 | 984 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
985 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
986 | INIT_HLIST_HEAD(&gn->vni_list[h]); | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | static void __net_exit geneve_exit_net(struct net *net) | |
992 | { | |
993 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
994 | struct geneve_dev *geneve, *next; | |
995 | struct net_device *dev, *aux; | |
996 | LIST_HEAD(list); | |
997 | ||
998 | rtnl_lock(); | |
999 | ||
1000 | /* gather any geneve devices that were moved into this ns */ | |
1001 | for_each_netdev_safe(net, dev, aux) | |
1002 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1003 | unregister_netdevice_queue(dev, &list); | |
1004 | ||
1005 | /* now gather any other geneve devices that were created in this ns */ | |
1006 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1007 | /* If geneve->dev is in the same netns, it was already added | |
1008 | * to the list by the previous loop. | |
1009 | */ | |
1010 | if (!net_eq(dev_net(geneve->dev), net)) | |
1011 | unregister_netdevice_queue(geneve->dev, &list); | |
1012 | } | |
1013 | ||
1014 | /* unregister the devices gathered above */ | |
1015 | unregister_netdevice_many(&list); | |
1016 | rtnl_unlock(); | |
1017 | } | |
1018 | ||
1019 | static struct pernet_operations geneve_net_ops = { | |
1020 | .init = geneve_init_net, | |
1021 | .exit = geneve_exit_net, | |
1022 | .id = &geneve_net_id, | |
1023 | .size = sizeof(struct geneve_net), | |
1024 | }; | |
1025 | ||
1026 | static int __init geneve_init_module(void) | |
1027 | { | |
1028 | int rc; | |
1029 | ||
1030 | rc = register_pernet_subsys(&geneve_net_ops); | |
1031 | if (rc) | |
1032 | goto out1; | |
1033 | ||
1034 | rc = rtnl_link_register(&geneve_link_ops); | |
1035 | if (rc) | |
1036 | goto out2; | |
1037 | ||
1038 | return 0; | |
1039 | out2: | |
1040 | unregister_pernet_subsys(&geneve_net_ops); | |
1041 | out1: | |
1042 | return rc; | |
1043 | } | |
1044 | late_initcall(geneve_init_module); | |
1045 | ||
1046 | static void __exit geneve_cleanup_module(void) | |
1047 | { | |
1048 | rtnl_link_unregister(&geneve_link_ops); | |
1049 | unregister_pernet_subsys(&geneve_net_ops); | |
1050 | } | |
1051 | module_exit(geneve_cleanup_module); | |
1052 | ||
1053 | MODULE_LICENSE("GPL"); | |
1054 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1055 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1056 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1057 | MODULE_ALIAS_RTNL_LINK("geneve"); |