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8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/ethtool.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/etherdevice.h>
14#include <linux/hash.h>
15#include <net/ipv6_stubs.h>
16#include <net/dst_metadata.h>
17#include <net/gro_cells.h>
18#include <net/rtnetlink.h>
19#include <net/geneve.h>
20#include <net/protocol.h>
21
22#define GENEVE_NETDEV_VER "0.6"
23
24#define GENEVE_N_VID (1u << 24)
25#define GENEVE_VID_MASK (GENEVE_N_VID - 1)
26
27#define VNI_HASH_BITS 10
28#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
29
30static bool log_ecn_error = true;
31module_param(log_ecn_error, bool, 0644);
32MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
33
34#define GENEVE_VER 0
35#define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
36#define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN)
37#define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN)
38
39
40struct geneve_net {
41 struct list_head geneve_list;
42 struct list_head sock_list;
43};
44
45static unsigned int geneve_net_id;
46
47struct geneve_dev_node {
48 struct hlist_node hlist;
49 struct geneve_dev *geneve;
50};
51
52struct geneve_config {
53 struct ip_tunnel_info info;
54 bool collect_md;
55 bool use_udp6_rx_checksums;
56 bool ttl_inherit;
57 enum ifla_geneve_df df;
58};
59
60
61struct geneve_dev {
62 struct geneve_dev_node hlist4;
63#if IS_ENABLED(CONFIG_IPV6)
64 struct geneve_dev_node hlist6;
65#endif
66 struct net *net;
67 struct net_device *dev;
68 struct geneve_sock __rcu *sock4;
69#if IS_ENABLED(CONFIG_IPV6)
70 struct geneve_sock __rcu *sock6;
71#endif
72 struct list_head next;
73 struct gro_cells gro_cells;
74 struct geneve_config cfg;
75};
76
77struct geneve_sock {
78 bool collect_md;
79 struct list_head list;
80 struct socket *sock;
81 struct rcu_head rcu;
82 int refcnt;
83 struct hlist_head vni_list[VNI_HASH_SIZE];
84};
85
86static inline __u32 geneve_net_vni_hash(u8 vni[3])
87{
88 __u32 vnid;
89
90 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
91 return hash_32(vnid, VNI_HASH_BITS);
92}
93
94static __be64 vni_to_tunnel_id(const __u8 *vni)
95{
96#ifdef __BIG_ENDIAN
97 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
98#else
99 return (__force __be64)(((__force u64)vni[0] << 40) |
100 ((__force u64)vni[1] << 48) |
101 ((__force u64)vni[2] << 56));
102#endif
103}
104
105
106static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
107{
108#ifdef __BIG_ENDIAN
109 vni[0] = (__force __u8)(tun_id >> 16);
110 vni[1] = (__force __u8)(tun_id >> 8);
111 vni[2] = (__force __u8)tun_id;
112#else
113 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
114 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
115 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
116#endif
117}
118
119static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni)
120{
121 return !memcmp(vni, &tun_id[5], 3);
122}
123
124static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
125{
126 return gs->sock->sk->sk_family;
127}
128
129static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
130 __be32 addr, u8 vni[])
131{
132 struct hlist_head *vni_list_head;
133 struct geneve_dev_node *node;
134 __u32 hash;
135
136
137 hash = geneve_net_vni_hash(vni);
138 vni_list_head = &gs->vni_list[hash];
139 hlist_for_each_entry_rcu(node, vni_list_head, hlist) {
140 if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) &&
141 addr == node->geneve->cfg.info.key.u.ipv4.dst)
142 return node->geneve;
143 }
144 return NULL;
145}
146
147#if IS_ENABLED(CONFIG_IPV6)
148static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs,
149 struct in6_addr addr6, u8 vni[])
150{
151 struct hlist_head *vni_list_head;
152 struct geneve_dev_node *node;
153 __u32 hash;
154
155
156 hash = geneve_net_vni_hash(vni);
157 vni_list_head = &gs->vni_list[hash];
158 hlist_for_each_entry_rcu(node, vni_list_head, hlist) {
159 if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) &&
160 ipv6_addr_equal(&addr6, &node->geneve->cfg.info.key.u.ipv6.dst))
161 return node->geneve;
162 }
163 return NULL;
164}
165#endif
166
167static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
168{
169 return (struct genevehdr *)(udp_hdr(skb) + 1);
170}
171
172static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs,
173 struct sk_buff *skb)
174{
175 static u8 zero_vni[3];
176 u8 *vni;
177
178 if (geneve_get_sk_family(gs) == AF_INET) {
179 struct iphdr *iph;
180 __be32 addr;
181
182 iph = ip_hdr(skb);
183
184 if (gs->collect_md) {
185 vni = zero_vni;
186 addr = 0;
187 } else {
188 vni = geneve_hdr(skb)->vni;
189 addr = iph->saddr;
190 }
191
192 return geneve_lookup(gs, addr, vni);
193#if IS_ENABLED(CONFIG_IPV6)
194 } else if (geneve_get_sk_family(gs) == AF_INET6) {
195 static struct in6_addr zero_addr6;
196 struct ipv6hdr *ip6h;
197 struct in6_addr addr6;
198
199 ip6h = ipv6_hdr(skb);
200
201 if (gs->collect_md) {
202 vni = zero_vni;
203 addr6 = zero_addr6;
204 } else {
205 vni = geneve_hdr(skb)->vni;
206 addr6 = ip6h->saddr;
207 }
208
209 return geneve6_lookup(gs, addr6, vni);
210#endif
211 }
212 return NULL;
213}
214
215
216static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
217 struct sk_buff *skb)
218{
219 struct genevehdr *gnvh = geneve_hdr(skb);
220 struct metadata_dst *tun_dst = NULL;
221 unsigned int len;
222 int err = 0;
223 void *oiph;
224
225 if (ip_tunnel_collect_metadata() || gs->collect_md) {
226 __be16 flags;
227
228 flags = TUNNEL_KEY | (gnvh->oam ? TUNNEL_OAM : 0) |
229 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
230
231 tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
232 vni_to_tunnel_id(gnvh->vni),
233 gnvh->opt_len * 4);
234 if (!tun_dst) {
235 geneve->dev->stats.rx_dropped++;
236 goto drop;
237 }
238
239 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
240 gnvh->options, gnvh->opt_len * 4,
241 TUNNEL_GENEVE_OPT);
242 } else {
243
244
245
246 if (gnvh->critical) {
247 geneve->dev->stats.rx_frame_errors++;
248 geneve->dev->stats.rx_errors++;
249 goto drop;
250 }
251 }
252
253 skb_reset_mac_header(skb);
254 skb->protocol = eth_type_trans(skb, geneve->dev);
255 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
256
257 if (tun_dst)
258 skb_dst_set(skb, &tun_dst->dst);
259
260
261 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) {
262 geneve->dev->stats.rx_errors++;
263 goto drop;
264 }
265
266 oiph = skb_network_header(skb);
267 skb_reset_network_header(skb);
268
269 if (geneve_get_sk_family(gs) == AF_INET)
270 err = IP_ECN_decapsulate(oiph, skb);
271#if IS_ENABLED(CONFIG_IPV6)
272 else
273 err = IP6_ECN_decapsulate(oiph, skb);
274#endif
275
276 if (unlikely(err)) {
277 if (log_ecn_error) {
278 if (geneve_get_sk_family(gs) == AF_INET)
279 net_info_ratelimited("non-ECT from %pI4 "
280 "with TOS=%#x\n",
281 &((struct iphdr *)oiph)->saddr,
282 ((struct iphdr *)oiph)->tos);
283#if IS_ENABLED(CONFIG_IPV6)
284 else
285 net_info_ratelimited("non-ECT from %pI6\n",
286 &((struct ipv6hdr *)oiph)->saddr);
287#endif
288 }
289 if (err > 1) {
290 ++geneve->dev->stats.rx_frame_errors;
291 ++geneve->dev->stats.rx_errors;
292 goto drop;
293 }
294 }
295
296 len = skb->len;
297 err = gro_cells_receive(&geneve->gro_cells, skb);
298 if (likely(err == NET_RX_SUCCESS))
299 dev_sw_netstats_rx_add(geneve->dev, len);
300
301 return;
302drop:
303
304 kfree_skb(skb);
305}
306
307
308static int geneve_init(struct net_device *dev)
309{
310 struct geneve_dev *geneve = netdev_priv(dev);
311 int err;
312
313 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
314 if (!dev->tstats)
315 return -ENOMEM;
316
317 err = gro_cells_init(&geneve->gro_cells, dev);
318 if (err) {
319 free_percpu(dev->tstats);
320 return err;
321 }
322
323 err = dst_cache_init(&geneve->cfg.info.dst_cache, GFP_KERNEL);
324 if (err) {
325 free_percpu(dev->tstats);
326 gro_cells_destroy(&geneve->gro_cells);
327 return err;
328 }
329 return 0;
330}
331
332static void geneve_uninit(struct net_device *dev)
333{
334 struct geneve_dev *geneve = netdev_priv(dev);
335
336 dst_cache_destroy(&geneve->cfg.info.dst_cache);
337 gro_cells_destroy(&geneve->gro_cells);
338 free_percpu(dev->tstats);
339}
340
341
342static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
343{
344 struct genevehdr *geneveh;
345 struct geneve_dev *geneve;
346 struct geneve_sock *gs;
347 int opts_len;
348
349
350 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
351 goto drop;
352
353
354 geneveh = geneve_hdr(skb);
355 if (unlikely(geneveh->ver != GENEVE_VER))
356 goto drop;
357
358 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
359 goto drop;
360
361 gs = rcu_dereference_sk_user_data(sk);
362 if (!gs)
363 goto drop;
364
365 geneve = geneve_lookup_skb(gs, skb);
366 if (!geneve)
367 goto drop;
368
369 opts_len = geneveh->opt_len * 4;
370 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
371 htons(ETH_P_TEB),
372 !net_eq(geneve->net, dev_net(geneve->dev)))) {
373 geneve->dev->stats.rx_dropped++;
374 goto drop;
375 }
376
377 geneve_rx(geneve, gs, skb);
378 return 0;
379
380drop:
381
382 kfree_skb(skb);
383 return 0;
384}
385
386
387static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb)
388{
389 struct genevehdr *geneveh;
390 struct geneve_sock *gs;
391 u8 zero_vni[3] = { 0 };
392 u8 *vni = zero_vni;
393
394 if (!pskb_may_pull(skb, skb_transport_offset(skb) + GENEVE_BASE_HLEN))
395 return -EINVAL;
396
397 geneveh = geneve_hdr(skb);
398 if (geneveh->ver != GENEVE_VER)
399 return -EINVAL;
400
401 if (geneveh->proto_type != htons(ETH_P_TEB))
402 return -EINVAL;
403
404 gs = rcu_dereference_sk_user_data(sk);
405 if (!gs)
406 return -ENOENT;
407
408 if (geneve_get_sk_family(gs) == AF_INET) {
409 struct iphdr *iph = ip_hdr(skb);
410 __be32 addr4 = 0;
411
412 if (!gs->collect_md) {
413 vni = geneve_hdr(skb)->vni;
414 addr4 = iph->daddr;
415 }
416
417 return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT;
418 }
419
420#if IS_ENABLED(CONFIG_IPV6)
421 if (geneve_get_sk_family(gs) == AF_INET6) {
422 struct ipv6hdr *ip6h = ipv6_hdr(skb);
423 struct in6_addr addr6;
424
425 memset(&addr6, 0, sizeof(struct in6_addr));
426
427 if (!gs->collect_md) {
428 vni = geneve_hdr(skb)->vni;
429 addr6 = ip6h->daddr;
430 }
431
432 return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT;
433 }
434#endif
435
436 return -EPFNOSUPPORT;
437}
438
439static struct socket *geneve_create_sock(struct net *net, bool ipv6,
440 __be16 port, bool ipv6_rx_csum)
441{
442 struct socket *sock;
443 struct udp_port_cfg udp_conf;
444 int err;
445
446 memset(&udp_conf, 0, sizeof(udp_conf));
447
448 if (ipv6) {
449 udp_conf.family = AF_INET6;
450 udp_conf.ipv6_v6only = 1;
451 udp_conf.use_udp6_rx_checksums = ipv6_rx_csum;
452 } else {
453 udp_conf.family = AF_INET;
454 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
455 }
456
457 udp_conf.local_udp_port = port;
458
459
460 err = udp_sock_create(net, &udp_conf, &sock);
461 if (err < 0)
462 return ERR_PTR(err);
463
464 return sock;
465}
466
467static int geneve_hlen(struct genevehdr *gh)
468{
469 return sizeof(*gh) + gh->opt_len * 4;
470}
471
472static struct sk_buff *geneve_gro_receive(struct sock *sk,
473 struct list_head *head,
474 struct sk_buff *skb)
475{
476 struct sk_buff *pp = NULL;
477 struct sk_buff *p;
478 struct genevehdr *gh, *gh2;
479 unsigned int hlen, gh_len, off_gnv;
480 const struct packet_offload *ptype;
481 __be16 type;
482 int flush = 1;
483
484 off_gnv = skb_gro_offset(skb);
485 hlen = off_gnv + sizeof(*gh);
486 gh = skb_gro_header_fast(skb, off_gnv);
487 if (skb_gro_header_hard(skb, hlen)) {
488 gh = skb_gro_header_slow(skb, hlen, off_gnv);
489 if (unlikely(!gh))
490 goto out;
491 }
492
493 if (gh->ver != GENEVE_VER || gh->oam)
494 goto out;
495 gh_len = geneve_hlen(gh);
496
497 hlen = off_gnv + gh_len;
498 if (skb_gro_header_hard(skb, hlen)) {
499 gh = skb_gro_header_slow(skb, hlen, off_gnv);
500 if (unlikely(!gh))
501 goto out;
502 }
503
504 list_for_each_entry(p, head, list) {
505 if (!NAPI_GRO_CB(p)->same_flow)
506 continue;
507
508 gh2 = (struct genevehdr *)(p->data + off_gnv);
509 if (gh->opt_len != gh2->opt_len ||
510 memcmp(gh, gh2, gh_len)) {
511 NAPI_GRO_CB(p)->same_flow = 0;
512 continue;
513 }
514 }
515
516 type = gh->proto_type;
517
518 rcu_read_lock();
519 ptype = gro_find_receive_by_type(type);
520 if (!ptype)
521 goto out_unlock;
522
523 skb_gro_pull(skb, gh_len);
524 skb_gro_postpull_rcsum(skb, gh, gh_len);
525 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
526 flush = 0;
527
528out_unlock:
529 rcu_read_unlock();
530out:
531 skb_gro_flush_final(skb, pp, flush);
532
533 return pp;
534}
535
536static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb,
537 int nhoff)
538{
539 struct genevehdr *gh;
540 struct packet_offload *ptype;
541 __be16 type;
542 int gh_len;
543 int err = -ENOSYS;
544
545 gh = (struct genevehdr *)(skb->data + nhoff);
546 gh_len = geneve_hlen(gh);
547 type = gh->proto_type;
548
549 rcu_read_lock();
550 ptype = gro_find_complete_by_type(type);
551 if (ptype)
552 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
553
554 rcu_read_unlock();
555
556 skb_set_inner_mac_header(skb, nhoff + gh_len);
557
558 return err;
559}
560
561
562static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
563 bool ipv6, bool ipv6_rx_csum)
564{
565 struct geneve_net *gn = net_generic(net, geneve_net_id);
566 struct geneve_sock *gs;
567 struct socket *sock;
568 struct udp_tunnel_sock_cfg tunnel_cfg;
569 int h;
570
571 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
572 if (!gs)
573 return ERR_PTR(-ENOMEM);
574
575 sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum);
576 if (IS_ERR(sock)) {
577 kfree(gs);
578 return ERR_CAST(sock);
579 }
580
581 gs->sock = sock;
582 gs->refcnt = 1;
583 for (h = 0; h < VNI_HASH_SIZE; ++h)
584 INIT_HLIST_HEAD(&gs->vni_list[h]);
585
586
587 udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
588
589
590 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
591 tunnel_cfg.sk_user_data = gs;
592 tunnel_cfg.encap_type = 1;
593 tunnel_cfg.gro_receive = geneve_gro_receive;
594 tunnel_cfg.gro_complete = geneve_gro_complete;
595 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
596 tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup;
597 tunnel_cfg.encap_destroy = NULL;
598 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
599 list_add(&gs->list, &gn->sock_list);
600 return gs;
601}
602
603static void __geneve_sock_release(struct geneve_sock *gs)
604{
605 if (!gs || --gs->refcnt)
606 return;
607
608 list_del(&gs->list);
609 udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
610 udp_tunnel_sock_release(gs->sock);
611 kfree_rcu(gs, rcu);
612}
613
614static void geneve_sock_release(struct geneve_dev *geneve)
615{
616 struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4);
617#if IS_ENABLED(CONFIG_IPV6)
618 struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6);
619
620 rcu_assign_pointer(geneve->sock6, NULL);
621#endif
622
623 rcu_assign_pointer(geneve->sock4, NULL);
624 synchronize_net();
625
626 __geneve_sock_release(gs4);
627#if IS_ENABLED(CONFIG_IPV6)
628 __geneve_sock_release(gs6);
629#endif
630}
631
632static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
633 sa_family_t family,
634 __be16 dst_port)
635{
636 struct geneve_sock *gs;
637
638 list_for_each_entry(gs, &gn->sock_list, list) {
639 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
640 geneve_get_sk_family(gs) == family) {
641 return gs;
642 }
643 }
644 return NULL;
645}
646
647static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
648{
649 struct net *net = geneve->net;
650 struct geneve_net *gn = net_generic(net, geneve_net_id);
651 struct geneve_dev_node *node;
652 struct geneve_sock *gs;
653 __u8 vni[3];
654 __u32 hash;
655
656 gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->cfg.info.key.tp_dst);
657 if (gs) {
658 gs->refcnt++;
659 goto out;
660 }
661
662 gs = geneve_socket_create(net, geneve->cfg.info.key.tp_dst, ipv6,
663 geneve->cfg.use_udp6_rx_checksums);
664 if (IS_ERR(gs))
665 return PTR_ERR(gs);
666
667out:
668 gs->collect_md = geneve->cfg.collect_md;
669#if IS_ENABLED(CONFIG_IPV6)
670 if (ipv6) {
671 rcu_assign_pointer(geneve->sock6, gs);
672 node = &geneve->hlist6;
673 } else
674#endif
675 {
676 rcu_assign_pointer(geneve->sock4, gs);
677 node = &geneve->hlist4;
678 }
679 node->geneve = geneve;
680
681 tunnel_id_to_vni(geneve->cfg.info.key.tun_id, vni);
682 hash = geneve_net_vni_hash(vni);
683 hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]);
684 return 0;
685}
686
687static int geneve_open(struct net_device *dev)
688{
689 struct geneve_dev *geneve = netdev_priv(dev);
690 bool metadata = geneve->cfg.collect_md;
691 bool ipv4, ipv6;
692 int ret = 0;
693
694 ipv6 = geneve->cfg.info.mode & IP_TUNNEL_INFO_IPV6 || metadata;
695 ipv4 = !ipv6 || metadata;
696#if IS_ENABLED(CONFIG_IPV6)
697 if (ipv6) {
698 ret = geneve_sock_add(geneve, true);
699 if (ret < 0 && ret != -EAFNOSUPPORT)
700 ipv4 = false;
701 }
702#endif
703 if (ipv4)
704 ret = geneve_sock_add(geneve, false);
705 if (ret < 0)
706 geneve_sock_release(geneve);
707
708 return ret;
709}
710
711static int geneve_stop(struct net_device *dev)
712{
713 struct geneve_dev *geneve = netdev_priv(dev);
714
715 hlist_del_init_rcu(&geneve->hlist4.hlist);
716#if IS_ENABLED(CONFIG_IPV6)
717 hlist_del_init_rcu(&geneve->hlist6.hlist);
718#endif
719 geneve_sock_release(geneve);
720 return 0;
721}
722
723static void geneve_build_header(struct genevehdr *geneveh,
724 const struct ip_tunnel_info *info)
725{
726 geneveh->ver = GENEVE_VER;
727 geneveh->opt_len = info->options_len / 4;
728 geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM);
729 geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT);
730 geneveh->rsvd1 = 0;
731 tunnel_id_to_vni(info->key.tun_id, geneveh->vni);
732 geneveh->proto_type = htons(ETH_P_TEB);
733 geneveh->rsvd2 = 0;
734
735 if (info->key.tun_flags & TUNNEL_GENEVE_OPT)
736 ip_tunnel_info_opts_get(geneveh->options, info);
737}
738
739static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb,
740 const struct ip_tunnel_info *info,
741 bool xnet, int ip_hdr_len)
742{
743 bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
744 struct genevehdr *gnvh;
745 int min_headroom;
746 int err;
747
748 skb_reset_mac_header(skb);
749 skb_scrub_packet(skb, xnet);
750
751 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len +
752 GENEVE_BASE_HLEN + info->options_len + ip_hdr_len;
753 err = skb_cow_head(skb, min_headroom);
754 if (unlikely(err))
755 goto free_dst;
756
757 err = udp_tunnel_handle_offloads(skb, udp_sum);
758 if (err)
759 goto free_dst;
760
761 gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len);
762 geneve_build_header(gnvh, info);
763 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
764 return 0;
765
766free_dst:
767 dst_release(dst);
768 return err;
769}
770
771static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
772 struct net_device *dev,
773 struct geneve_sock *gs4,
774 struct flowi4 *fl4,
775 const struct ip_tunnel_info *info,
776 __be16 dport, __be16 sport)
777{
778 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
779 struct geneve_dev *geneve = netdev_priv(dev);
780 struct dst_cache *dst_cache;
781 struct rtable *rt = NULL;
782 __u8 tos;
783
784 if (!gs4)
785 return ERR_PTR(-EIO);
786
787 memset(fl4, 0, sizeof(*fl4));
788 fl4->flowi4_mark = skb->mark;
789 fl4->flowi4_proto = IPPROTO_UDP;
790 fl4->daddr = info->key.u.ipv4.dst;
791 fl4->saddr = info->key.u.ipv4.src;
792 fl4->fl4_dport = dport;
793 fl4->fl4_sport = sport;
794
795 tos = info->key.tos;
796 if ((tos == 1) && !geneve->cfg.collect_md) {
797 tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
798 use_cache = false;
799 }
800 fl4->flowi4_tos = RT_TOS(tos);
801
802 dst_cache = (struct dst_cache *)&info->dst_cache;
803 if (use_cache) {
804 rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
805 if (rt)
806 return rt;
807 }
808 rt = ip_route_output_key(geneve->net, fl4);
809 if (IS_ERR(rt)) {
810 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
811 return ERR_PTR(-ENETUNREACH);
812 }
813 if (rt->dst.dev == dev) {
814 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
815 ip_rt_put(rt);
816 return ERR_PTR(-ELOOP);
817 }
818 if (use_cache)
819 dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
820 return rt;
821}
822
823#if IS_ENABLED(CONFIG_IPV6)
824static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
825 struct net_device *dev,
826 struct geneve_sock *gs6,
827 struct flowi6 *fl6,
828 const struct ip_tunnel_info *info,
829 __be16 dport, __be16 sport)
830{
831 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
832 struct geneve_dev *geneve = netdev_priv(dev);
833 struct dst_entry *dst = NULL;
834 struct dst_cache *dst_cache;
835 __u8 prio;
836
837 if (!gs6)
838 return ERR_PTR(-EIO);
839
840 memset(fl6, 0, sizeof(*fl6));
841 fl6->flowi6_mark = skb->mark;
842 fl6->flowi6_proto = IPPROTO_UDP;
843 fl6->daddr = info->key.u.ipv6.dst;
844 fl6->saddr = info->key.u.ipv6.src;
845 fl6->fl6_dport = dport;
846 fl6->fl6_sport = sport;
847
848 prio = info->key.tos;
849 if ((prio == 1) && !geneve->cfg.collect_md) {
850 prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
851 use_cache = false;
852 }
853
854 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
855 info->key.label);
856 dst_cache = (struct dst_cache *)&info->dst_cache;
857 if (use_cache) {
858 dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
859 if (dst)
860 return dst;
861 }
862 dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6,
863 NULL);
864 if (IS_ERR(dst)) {
865 netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr);
866 return ERR_PTR(-ENETUNREACH);
867 }
868 if (dst->dev == dev) {
869 netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr);
870 dst_release(dst);
871 return ERR_PTR(-ELOOP);
872 }
873
874 if (use_cache)
875 dst_cache_set_ip6(dst_cache, dst, &fl6->saddr);
876 return dst;
877}
878#endif
879
880static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
881 struct geneve_dev *geneve,
882 const struct ip_tunnel_info *info)
883{
884 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
885 struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
886 const struct ip_tunnel_key *key = &info->key;
887 struct rtable *rt;
888 struct flowi4 fl4;
889 __u8 tos, ttl;
890 __be16 df = 0;
891 __be16 sport;
892 int err;
893
894 if (!pskb_network_may_pull(skb, sizeof(struct iphdr)))
895 return -EINVAL;
896
897 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
898 rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
899 geneve->cfg.info.key.tp_dst, sport);
900 if (IS_ERR(rt))
901 return PTR_ERR(rt);
902
903 err = skb_tunnel_check_pmtu(skb, &rt->dst,
904 GENEVE_IPV4_HLEN + info->options_len,
905 netif_is_any_bridge_port(dev));
906 if (err < 0) {
907 dst_release(&rt->dst);
908 return err;
909 } else if (err) {
910 struct ip_tunnel_info *info;
911
912 info = skb_tunnel_info(skb);
913 if (info) {
914 struct ip_tunnel_info *unclone;
915
916 unclone = skb_tunnel_info_unclone(skb);
917 if (unlikely(!unclone)) {
918 dst_release(&rt->dst);
919 return -ENOMEM;
920 }
921
922 unclone->key.u.ipv4.dst = fl4.saddr;
923 unclone->key.u.ipv4.src = fl4.daddr;
924 }
925
926 if (!pskb_may_pull(skb, ETH_HLEN)) {
927 dst_release(&rt->dst);
928 return -EINVAL;
929 }
930
931 skb->protocol = eth_type_trans(skb, geneve->dev);
932 netif_rx(skb);
933 dst_release(&rt->dst);
934 return -EMSGSIZE;
935 }
936
937 if (geneve->cfg.collect_md) {
938 tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
939 ttl = key->ttl;
940
941 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
942 } else {
943 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
944 if (geneve->cfg.ttl_inherit)
945 ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb);
946 else
947 ttl = key->ttl;
948 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
949
950 if (geneve->cfg.df == GENEVE_DF_SET) {
951 df = htons(IP_DF);
952 } else if (geneve->cfg.df == GENEVE_DF_INHERIT) {
953 struct ethhdr *eth = eth_hdr(skb);
954
955 if (ntohs(eth->h_proto) == ETH_P_IPV6) {
956 df = htons(IP_DF);
957 } else if (ntohs(eth->h_proto) == ETH_P_IP) {
958 struct iphdr *iph = ip_hdr(skb);
959
960 if (iph->frag_off & htons(IP_DF))
961 df = htons(IP_DF);
962 }
963 }
964 }
965
966 err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr));
967 if (unlikely(err))
968 return err;
969
970 udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
971 tos, ttl, df, sport, geneve->cfg.info.key.tp_dst,
972 !net_eq(geneve->net, dev_net(geneve->dev)),
973 !(info->key.tun_flags & TUNNEL_CSUM));
974 return 0;
975}
976
977#if IS_ENABLED(CONFIG_IPV6)
978static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
979 struct geneve_dev *geneve,
980 const struct ip_tunnel_info *info)
981{
982 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
983 struct geneve_sock *gs6 = rcu_dereference(geneve->sock6);
984 const struct ip_tunnel_key *key = &info->key;
985 struct dst_entry *dst = NULL;
986 struct flowi6 fl6;
987 __u8 prio, ttl;
988 __be16 sport;
989 int err;
990
991 if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr)))
992 return -EINVAL;
993
994 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
995 dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info,
996 geneve->cfg.info.key.tp_dst, sport);
997 if (IS_ERR(dst))
998 return PTR_ERR(dst);
999
1000 err = skb_tunnel_check_pmtu(skb, dst,
1001 GENEVE_IPV6_HLEN + info->options_len,
1002 netif_is_any_bridge_port(dev));
1003 if (err < 0) {
1004 dst_release(dst);
1005 return err;
1006 } else if (err) {
1007 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1008
1009 if (info) {
1010 struct ip_tunnel_info *unclone;
1011
1012 unclone = skb_tunnel_info_unclone(skb);
1013 if (unlikely(!unclone)) {
1014 dst_release(dst);
1015 return -ENOMEM;
1016 }
1017
1018 unclone->key.u.ipv6.dst = fl6.saddr;
1019 unclone->key.u.ipv6.src = fl6.daddr;
1020 }
1021
1022 if (!pskb_may_pull(skb, ETH_HLEN)) {
1023 dst_release(dst);
1024 return -EINVAL;
1025 }
1026
1027 skb->protocol = eth_type_trans(skb, geneve->dev);
1028 netif_rx(skb);
1029 dst_release(dst);
1030 return -EMSGSIZE;
1031 }
1032
1033 if (geneve->cfg.collect_md) {
1034 prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
1035 ttl = key->ttl;
1036 } else {
1037 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1038 ip_hdr(skb), skb);
1039 if (geneve->cfg.ttl_inherit)
1040 ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb);
1041 else
1042 ttl = key->ttl;
1043 ttl = ttl ? : ip6_dst_hoplimit(dst);
1044 }
1045 err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr));
1046 if (unlikely(err))
1047 return err;
1048
1049 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
1050 &fl6.saddr, &fl6.daddr, prio, ttl,
1051 info->key.label, sport, geneve->cfg.info.key.tp_dst,
1052 !(info->key.tun_flags & TUNNEL_CSUM));
1053 return 0;
1054}
1055#endif
1056
1057static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1058{
1059 struct geneve_dev *geneve = netdev_priv(dev);
1060 struct ip_tunnel_info *info = NULL;
1061 int err;
1062
1063 if (geneve->cfg.collect_md) {
1064 info = skb_tunnel_info(skb);
1065 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
1066 netdev_dbg(dev, "no tunnel metadata\n");
1067 dev_kfree_skb(skb);
1068 dev->stats.tx_dropped++;
1069 return NETDEV_TX_OK;
1070 }
1071 } else {
1072 info = &geneve->cfg.info;
1073 }
1074
1075 rcu_read_lock();
1076#if IS_ENABLED(CONFIG_IPV6)
1077 if (info->mode & IP_TUNNEL_INFO_IPV6)
1078 err = geneve6_xmit_skb(skb, dev, geneve, info);
1079 else
1080#endif
1081 err = geneve_xmit_skb(skb, dev, geneve, info);
1082 rcu_read_unlock();
1083
1084 if (likely(!err))
1085 return NETDEV_TX_OK;
1086
1087 if (err != -EMSGSIZE)
1088 dev_kfree_skb(skb);
1089
1090 if (err == -ELOOP)
1091 dev->stats.collisions++;
1092 else if (err == -ENETUNREACH)
1093 dev->stats.tx_carrier_errors++;
1094
1095 dev->stats.tx_errors++;
1096 return NETDEV_TX_OK;
1097}
1098
1099static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1100{
1101 if (new_mtu > dev->max_mtu)
1102 new_mtu = dev->max_mtu;
1103 else if (new_mtu < dev->min_mtu)
1104 new_mtu = dev->min_mtu;
1105
1106 dev->mtu = new_mtu;
1107 return 0;
1108}
1109
1110static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1111{
1112 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1113 struct geneve_dev *geneve = netdev_priv(dev);
1114 __be16 sport;
1115
1116 if (ip_tunnel_info_af(info) == AF_INET) {
1117 struct rtable *rt;
1118 struct flowi4 fl4;
1119
1120 struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
1121 sport = udp_flow_src_port(geneve->net, skb,
1122 1, USHRT_MAX, true);
1123
1124 rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
1125 geneve->cfg.info.key.tp_dst, sport);
1126 if (IS_ERR(rt))
1127 return PTR_ERR(rt);
1128
1129 ip_rt_put(rt);
1130 info->key.u.ipv4.src = fl4.saddr;
1131#if IS_ENABLED(CONFIG_IPV6)
1132 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1133 struct dst_entry *dst;
1134 struct flowi6 fl6;
1135
1136 struct geneve_sock *gs6 = rcu_dereference(geneve->sock6);
1137 sport = udp_flow_src_port(geneve->net, skb,
1138 1, USHRT_MAX, true);
1139
1140 dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info,
1141 geneve->cfg.info.key.tp_dst, sport);
1142 if (IS_ERR(dst))
1143 return PTR_ERR(dst);
1144
1145 dst_release(dst);
1146 info->key.u.ipv6.src = fl6.saddr;
1147#endif
1148 } else {
1149 return -EINVAL;
1150 }
1151
1152 info->key.tp_src = sport;
1153 info->key.tp_dst = geneve->cfg.info.key.tp_dst;
1154 return 0;
1155}
1156
1157static const struct net_device_ops geneve_netdev_ops = {
1158 .ndo_init = geneve_init,
1159 .ndo_uninit = geneve_uninit,
1160 .ndo_open = geneve_open,
1161 .ndo_stop = geneve_stop,
1162 .ndo_start_xmit = geneve_xmit,
1163 .ndo_get_stats64 = dev_get_tstats64,
1164 .ndo_change_mtu = geneve_change_mtu,
1165 .ndo_validate_addr = eth_validate_addr,
1166 .ndo_set_mac_address = eth_mac_addr,
1167 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
1168};
1169
1170static void geneve_get_drvinfo(struct net_device *dev,
1171 struct ethtool_drvinfo *drvinfo)
1172{
1173 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1174 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1175}
1176
1177static const struct ethtool_ops geneve_ethtool_ops = {
1178 .get_drvinfo = geneve_get_drvinfo,
1179 .get_link = ethtool_op_get_link,
1180};
1181
1182
1183static struct device_type geneve_type = {
1184 .name = "geneve",
1185};
1186
1187
1188
1189
1190
1191static void geneve_offload_rx_ports(struct net_device *dev, bool push)
1192{
1193 struct net *net = dev_net(dev);
1194 struct geneve_net *gn = net_generic(net, geneve_net_id);
1195 struct geneve_sock *gs;
1196
1197 rcu_read_lock();
1198 list_for_each_entry_rcu(gs, &gn->sock_list, list) {
1199 if (push) {
1200 udp_tunnel_push_rx_port(dev, gs->sock,
1201 UDP_TUNNEL_TYPE_GENEVE);
1202 } else {
1203 udp_tunnel_drop_rx_port(dev, gs->sock,
1204 UDP_TUNNEL_TYPE_GENEVE);
1205 }
1206 }
1207 rcu_read_unlock();
1208}
1209
1210
1211static void geneve_setup(struct net_device *dev)
1212{
1213 ether_setup(dev);
1214
1215 dev->netdev_ops = &geneve_netdev_ops;
1216 dev->ethtool_ops = &geneve_ethtool_ops;
1217 dev->needs_free_netdev = true;
1218
1219 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1220
1221 dev->features |= NETIF_F_LLTX;
1222 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
1223 dev->features |= NETIF_F_RXCSUM;
1224 dev->features |= NETIF_F_GSO_SOFTWARE;
1225
1226 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
1227 dev->hw_features |= NETIF_F_RXCSUM;
1228 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1229
1230
1231 dev->min_mtu = ETH_MIN_MTU;
1232
1233
1234
1235
1236 dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1237
1238 netif_keep_dst(dev);
1239 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1240 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
1241 eth_hw_addr_random(dev);
1242}
1243
1244static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1245 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1246 [IFLA_GENEVE_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) },
1247 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
1248 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
1249 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
1250 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
1251 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
1252 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
1253 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1254 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1255 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
1256 [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 },
1257 [IFLA_GENEVE_DF] = { .type = NLA_U8 },
1258};
1259
1260static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
1261 struct netlink_ext_ack *extack)
1262{
1263 if (tb[IFLA_ADDRESS]) {
1264 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
1265 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
1266 "Provided link layer address is not Ethernet");
1267 return -EINVAL;
1268 }
1269
1270 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
1271 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
1272 "Provided Ethernet address is not unicast");
1273 return -EADDRNOTAVAIL;
1274 }
1275 }
1276
1277 if (!data) {
1278 NL_SET_ERR_MSG(extack,
1279 "Not enough attributes provided to perform the operation");
1280 return -EINVAL;
1281 }
1282
1283 if (data[IFLA_GENEVE_ID]) {
1284 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1285
1286 if (vni >= GENEVE_N_VID) {
1287 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID],
1288 "Geneve ID must be lower than 16777216");
1289 return -ERANGE;
1290 }
1291 }
1292
1293 if (data[IFLA_GENEVE_DF]) {
1294 enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]);
1295
1296 if (df < 0 || df > GENEVE_DF_MAX) {
1297 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_DF],
1298 "Invalid DF attribute");
1299 return -EINVAL;
1300 }
1301 }
1302
1303 return 0;
1304}
1305
1306static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1307 const struct ip_tunnel_info *info,
1308 bool *tun_on_same_port,
1309 bool *tun_collect_md)
1310{
1311 struct geneve_dev *geneve, *t = NULL;
1312
1313 *tun_on_same_port = false;
1314 *tun_collect_md = false;
1315 list_for_each_entry(geneve, &gn->geneve_list, next) {
1316 if (info->key.tp_dst == geneve->cfg.info.key.tp_dst) {
1317 *tun_collect_md = geneve->cfg.collect_md;
1318 *tun_on_same_port = true;
1319 }
1320 if (info->key.tun_id == geneve->cfg.info.key.tun_id &&
1321 info->key.tp_dst == geneve->cfg.info.key.tp_dst &&
1322 !memcmp(&info->key.u, &geneve->cfg.info.key.u, sizeof(info->key.u)))
1323 t = geneve;
1324 }
1325 return t;
1326}
1327
1328static bool is_tnl_info_zero(const struct ip_tunnel_info *info)
1329{
1330 return !(info->key.tun_id || info->key.tun_flags || info->key.tos ||
1331 info->key.ttl || info->key.label || info->key.tp_src ||
1332 memchr_inv(&info->key.u, 0, sizeof(info->key.u)));
1333}
1334
1335static bool geneve_dst_addr_equal(struct ip_tunnel_info *a,
1336 struct ip_tunnel_info *b)
1337{
1338 if (ip_tunnel_info_af(a) == AF_INET)
1339 return a->key.u.ipv4.dst == b->key.u.ipv4.dst;
1340 else
1341 return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst);
1342}
1343
1344static int geneve_configure(struct net *net, struct net_device *dev,
1345 struct netlink_ext_ack *extack,
1346 const struct geneve_config *cfg)
1347{
1348 struct geneve_net *gn = net_generic(net, geneve_net_id);
1349 struct geneve_dev *t, *geneve = netdev_priv(dev);
1350 const struct ip_tunnel_info *info = &cfg->info;
1351 bool tun_collect_md, tun_on_same_port;
1352 int err, encap_len;
1353
1354 if (cfg->collect_md && !is_tnl_info_zero(info)) {
1355 NL_SET_ERR_MSG(extack,
1356 "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified");
1357 return -EINVAL;
1358 }
1359
1360 geneve->net = net;
1361 geneve->dev = dev;
1362
1363 t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md);
1364 if (t)
1365 return -EBUSY;
1366
1367
1368 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1369 if (!cfg->collect_md && ip_tunnel_info_af(info) == AF_INET) {
1370 encap_len += sizeof(struct iphdr);
1371 dev->max_mtu -= sizeof(struct iphdr);
1372 } else {
1373 encap_len += sizeof(struct ipv6hdr);
1374 dev->max_mtu -= sizeof(struct ipv6hdr);
1375 }
1376 dev->needed_headroom = encap_len + ETH_HLEN;
1377
1378 if (cfg->collect_md) {
1379 if (tun_on_same_port) {
1380 NL_SET_ERR_MSG(extack,
1381 "There can be only one externally controlled device on a destination port");
1382 return -EPERM;
1383 }
1384 } else {
1385 if (tun_collect_md) {
1386 NL_SET_ERR_MSG(extack,
1387 "There already exists an externally controlled device on this destination port");
1388 return -EPERM;
1389 }
1390 }
1391
1392 dst_cache_reset(&geneve->cfg.info.dst_cache);
1393 memcpy(&geneve->cfg, cfg, sizeof(*cfg));
1394
1395 err = register_netdevice(dev);
1396 if (err)
1397 return err;
1398
1399 list_add(&geneve->next, &gn->geneve_list);
1400 return 0;
1401}
1402
1403static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port)
1404{
1405 memset(info, 0, sizeof(*info));
1406 info->key.tp_dst = htons(dst_port);
1407}
1408
1409static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[],
1410 struct netlink_ext_ack *extack,
1411 struct geneve_config *cfg, bool changelink)
1412{
1413 struct ip_tunnel_info *info = &cfg->info;
1414 int attrtype;
1415
1416 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) {
1417 NL_SET_ERR_MSG(extack,
1418 "Cannot specify both IPv4 and IPv6 Remote addresses");
1419 return -EINVAL;
1420 }
1421
1422 if (data[IFLA_GENEVE_REMOTE]) {
1423 if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) {
1424 attrtype = IFLA_GENEVE_REMOTE;
1425 goto change_notsup;
1426 }
1427
1428 info->key.u.ipv4.dst =
1429 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1430
1431 if (ipv4_is_multicast(info->key.u.ipv4.dst)) {
1432 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE],
1433 "Remote IPv4 address cannot be Multicast");
1434 return -EINVAL;
1435 }
1436 }
1437
1438 if (data[IFLA_GENEVE_REMOTE6]) {
1439#if IS_ENABLED(CONFIG_IPV6)
1440 if (changelink && (ip_tunnel_info_af(info) == AF_INET)) {
1441 attrtype = IFLA_GENEVE_REMOTE6;
1442 goto change_notsup;
1443 }
1444
1445 info->mode = IP_TUNNEL_INFO_IPV6;
1446 info->key.u.ipv6.dst =
1447 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1448
1449 if (ipv6_addr_type(&info->key.u.ipv6.dst) &
1450 IPV6_ADDR_LINKLOCAL) {
1451 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1452 "Remote IPv6 address cannot be link-local");
1453 return -EINVAL;
1454 }
1455 if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) {
1456 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1457 "Remote IPv6 address cannot be Multicast");
1458 return -EINVAL;
1459 }
1460 info->key.tun_flags |= TUNNEL_CSUM;
1461 cfg->use_udp6_rx_checksums = true;
1462#else
1463 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1464 "IPv6 support not enabled in the kernel");
1465 return -EPFNOSUPPORT;
1466#endif
1467 }
1468
1469 if (data[IFLA_GENEVE_ID]) {
1470 __u32 vni;
1471 __u8 tvni[3];
1472 __be64 tunid;
1473
1474 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1475 tvni[0] = (vni & 0x00ff0000) >> 16;
1476 tvni[1] = (vni & 0x0000ff00) >> 8;
1477 tvni[2] = vni & 0x000000ff;
1478
1479 tunid = vni_to_tunnel_id(tvni);
1480 if (changelink && (tunid != info->key.tun_id)) {
1481 attrtype = IFLA_GENEVE_ID;
1482 goto change_notsup;
1483 }
1484 info->key.tun_id = tunid;
1485 }
1486
1487 if (data[IFLA_GENEVE_TTL_INHERIT]) {
1488 if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT]))
1489 cfg->ttl_inherit = true;
1490 else
1491 cfg->ttl_inherit = false;
1492 } else if (data[IFLA_GENEVE_TTL]) {
1493 info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1494 cfg->ttl_inherit = false;
1495 }
1496
1497 if (data[IFLA_GENEVE_TOS])
1498 info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1499
1500 if (data[IFLA_GENEVE_DF])
1501 cfg->df = nla_get_u8(data[IFLA_GENEVE_DF]);
1502
1503 if (data[IFLA_GENEVE_LABEL]) {
1504 info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1505 IPV6_FLOWLABEL_MASK;
1506 if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) {
1507 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL],
1508 "Label attribute only applies for IPv6 Geneve devices");
1509 return -EINVAL;
1510 }
1511 }
1512
1513 if (data[IFLA_GENEVE_PORT]) {
1514 if (changelink) {
1515 attrtype = IFLA_GENEVE_PORT;
1516 goto change_notsup;
1517 }
1518 info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]);
1519 }
1520
1521 if (data[IFLA_GENEVE_COLLECT_METADATA]) {
1522 if (changelink) {
1523 attrtype = IFLA_GENEVE_COLLECT_METADATA;
1524 goto change_notsup;
1525 }
1526 cfg->collect_md = true;
1527 }
1528
1529 if (data[IFLA_GENEVE_UDP_CSUM]) {
1530 if (changelink) {
1531 attrtype = IFLA_GENEVE_UDP_CSUM;
1532 goto change_notsup;
1533 }
1534 if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1535 info->key.tun_flags |= TUNNEL_CSUM;
1536 }
1537
1538 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
1539#if IS_ENABLED(CONFIG_IPV6)
1540 if (changelink) {
1541 attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX;
1542 goto change_notsup;
1543 }
1544 if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1545 info->key.tun_flags &= ~TUNNEL_CSUM;
1546#else
1547 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX],
1548 "IPv6 support not enabled in the kernel");
1549 return -EPFNOSUPPORT;
1550#endif
1551 }
1552
1553 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
1554#if IS_ENABLED(CONFIG_IPV6)
1555 if (changelink) {
1556 attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX;
1557 goto change_notsup;
1558 }
1559 if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1560 cfg->use_udp6_rx_checksums = false;
1561#else
1562 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX],
1563 "IPv6 support not enabled in the kernel");
1564 return -EPFNOSUPPORT;
1565#endif
1566 }
1567
1568 return 0;
1569change_notsup:
1570 NL_SET_ERR_MSG_ATTR(extack, data[attrtype],
1571 "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported");
1572 return -EOPNOTSUPP;
1573}
1574
1575static void geneve_link_config(struct net_device *dev,
1576 struct ip_tunnel_info *info, struct nlattr *tb[])
1577{
1578 struct geneve_dev *geneve = netdev_priv(dev);
1579 int ldev_mtu = 0;
1580
1581 if (tb[IFLA_MTU]) {
1582 geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1583 return;
1584 }
1585
1586 switch (ip_tunnel_info_af(info)) {
1587 case AF_INET: {
1588 struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst };
1589 struct rtable *rt = ip_route_output_key(geneve->net, &fl4);
1590
1591 if (!IS_ERR(rt) && rt->dst.dev) {
1592 ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN;
1593 ip_rt_put(rt);
1594 }
1595 break;
1596 }
1597#if IS_ENABLED(CONFIG_IPV6)
1598 case AF_INET6: {
1599 struct rt6_info *rt;
1600
1601 if (!__in6_dev_get(dev))
1602 break;
1603
1604 rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0,
1605 NULL, 0);
1606
1607 if (rt && rt->dst.dev)
1608 ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN;
1609 ip6_rt_put(rt);
1610 break;
1611 }
1612#endif
1613 }
1614
1615 if (ldev_mtu <= 0)
1616 return;
1617
1618 geneve_change_mtu(dev, ldev_mtu - info->options_len);
1619}
1620
1621static int geneve_newlink(struct net *net, struct net_device *dev,
1622 struct nlattr *tb[], struct nlattr *data[],
1623 struct netlink_ext_ack *extack)
1624{
1625 struct geneve_config cfg = {
1626 .df = GENEVE_DF_UNSET,
1627 .use_udp6_rx_checksums = false,
1628 .ttl_inherit = false,
1629 .collect_md = false,
1630 };
1631 int err;
1632
1633 init_tnl_info(&cfg.info, GENEVE_UDP_PORT);
1634 err = geneve_nl2info(tb, data, extack, &cfg, false);
1635 if (err)
1636 return err;
1637
1638 err = geneve_configure(net, dev, extack, &cfg);
1639 if (err)
1640 return err;
1641
1642 geneve_link_config(dev, &cfg.info, tb);
1643
1644 return 0;
1645}
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4,
1660 struct geneve_sock **gs6)
1661{
1662 *gs4 = rtnl_dereference(geneve->sock4);
1663 rcu_assign_pointer(geneve->sock4, NULL);
1664 if (*gs4)
1665 rcu_assign_sk_user_data((*gs4)->sock->sk, NULL);
1666#if IS_ENABLED(CONFIG_IPV6)
1667 *gs6 = rtnl_dereference(geneve->sock6);
1668 rcu_assign_pointer(geneve->sock6, NULL);
1669 if (*gs6)
1670 rcu_assign_sk_user_data((*gs6)->sock->sk, NULL);
1671#else
1672 *gs6 = NULL;
1673#endif
1674 synchronize_net();
1675}
1676
1677
1678static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4,
1679 struct geneve_sock __maybe_unused *gs6)
1680{
1681 rcu_assign_pointer(geneve->sock4, gs4);
1682 if (gs4)
1683 rcu_assign_sk_user_data(gs4->sock->sk, gs4);
1684#if IS_ENABLED(CONFIG_IPV6)
1685 rcu_assign_pointer(geneve->sock6, gs6);
1686 if (gs6)
1687 rcu_assign_sk_user_data(gs6->sock->sk, gs6);
1688#endif
1689 synchronize_net();
1690}
1691
1692static int geneve_changelink(struct net_device *dev, struct nlattr *tb[],
1693 struct nlattr *data[],
1694 struct netlink_ext_ack *extack)
1695{
1696 struct geneve_dev *geneve = netdev_priv(dev);
1697 struct geneve_sock *gs4, *gs6;
1698 struct geneve_config cfg;
1699 int err;
1700
1701
1702
1703
1704 if (geneve->cfg.collect_md)
1705 return -EOPNOTSUPP;
1706
1707
1708 memcpy(&cfg, &geneve->cfg, sizeof(cfg));
1709 err = geneve_nl2info(tb, data, extack, &cfg, true);
1710 if (err)
1711 return err;
1712
1713 if (!geneve_dst_addr_equal(&geneve->cfg.info, &cfg.info)) {
1714 dst_cache_reset(&cfg.info.dst_cache);
1715 geneve_link_config(dev, &cfg.info, tb);
1716 }
1717
1718 geneve_quiesce(geneve, &gs4, &gs6);
1719 memcpy(&geneve->cfg, &cfg, sizeof(cfg));
1720 geneve_unquiesce(geneve, gs4, gs6);
1721
1722 return 0;
1723}
1724
1725static void geneve_dellink(struct net_device *dev, struct list_head *head)
1726{
1727 struct geneve_dev *geneve = netdev_priv(dev);
1728
1729 list_del(&geneve->next);
1730 unregister_netdevice_queue(dev, head);
1731}
1732
1733static size_t geneve_get_size(const struct net_device *dev)
1734{
1735 return nla_total_size(sizeof(__u32)) +
1736 nla_total_size(sizeof(struct in6_addr)) +
1737 nla_total_size(sizeof(__u8)) +
1738 nla_total_size(sizeof(__u8)) +
1739 nla_total_size(sizeof(__u8)) +
1740 nla_total_size(sizeof(__be32)) +
1741 nla_total_size(sizeof(__be16)) +
1742 nla_total_size(0) +
1743 nla_total_size(sizeof(__u8)) +
1744 nla_total_size(sizeof(__u8)) +
1745 nla_total_size(sizeof(__u8)) +
1746 nla_total_size(sizeof(__u8)) +
1747 0;
1748}
1749
1750static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1751{
1752 struct geneve_dev *geneve = netdev_priv(dev);
1753 struct ip_tunnel_info *info = &geneve->cfg.info;
1754 bool ttl_inherit = geneve->cfg.ttl_inherit;
1755 bool metadata = geneve->cfg.collect_md;
1756 __u8 tmp_vni[3];
1757 __u32 vni;
1758
1759 tunnel_id_to_vni(info->key.tun_id, tmp_vni);
1760 vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2];
1761 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1762 goto nla_put_failure;
1763
1764 if (!metadata && ip_tunnel_info_af(info) == AF_INET) {
1765 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1766 info->key.u.ipv4.dst))
1767 goto nla_put_failure;
1768 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
1769 !!(info->key.tun_flags & TUNNEL_CSUM)))
1770 goto nla_put_failure;
1771
1772#if IS_ENABLED(CONFIG_IPV6)
1773 } else if (!metadata) {
1774 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1775 &info->key.u.ipv6.dst))
1776 goto nla_put_failure;
1777 if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1778 !(info->key.tun_flags & TUNNEL_CSUM)))
1779 goto nla_put_failure;
1780#endif
1781 }
1782
1783 if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) ||
1784 nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) ||
1785 nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label))
1786 goto nla_put_failure;
1787
1788 if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->cfg.df))
1789 goto nla_put_failure;
1790
1791 if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst))
1792 goto nla_put_failure;
1793
1794 if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1795 goto nla_put_failure;
1796
1797#if IS_ENABLED(CONFIG_IPV6)
1798 if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1799 !geneve->cfg.use_udp6_rx_checksums))
1800 goto nla_put_failure;
1801#endif
1802
1803 if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit))
1804 goto nla_put_failure;
1805
1806 return 0;
1807
1808nla_put_failure:
1809 return -EMSGSIZE;
1810}
1811
1812static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1813 .kind = "geneve",
1814 .maxtype = IFLA_GENEVE_MAX,
1815 .policy = geneve_policy,
1816 .priv_size = sizeof(struct geneve_dev),
1817 .setup = geneve_setup,
1818 .validate = geneve_validate,
1819 .newlink = geneve_newlink,
1820 .changelink = geneve_changelink,
1821 .dellink = geneve_dellink,
1822 .get_size = geneve_get_size,
1823 .fill_info = geneve_fill_info,
1824};
1825
1826struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1827 u8 name_assign_type, u16 dst_port)
1828{
1829 struct nlattr *tb[IFLA_MAX + 1];
1830 struct net_device *dev;
1831 LIST_HEAD(list_kill);
1832 int err;
1833 struct geneve_config cfg = {
1834 .df = GENEVE_DF_UNSET,
1835 .use_udp6_rx_checksums = true,
1836 .ttl_inherit = false,
1837 .collect_md = true,
1838 };
1839
1840 memset(tb, 0, sizeof(tb));
1841 dev = rtnl_create_link(net, name, name_assign_type,
1842 &geneve_link_ops, tb, NULL);
1843 if (IS_ERR(dev))
1844 return dev;
1845
1846 init_tnl_info(&cfg.info, dst_port);
1847 err = geneve_configure(net, dev, NULL, &cfg);
1848 if (err) {
1849 free_netdev(dev);
1850 return ERR_PTR(err);
1851 }
1852
1853
1854
1855
1856 err = geneve_change_mtu(dev, IP_MAX_MTU);
1857 if (err)
1858 goto err;
1859
1860 err = rtnl_configure_link(dev, NULL);
1861 if (err < 0)
1862 goto err;
1863
1864 return dev;
1865err:
1866 geneve_dellink(dev, &list_kill);
1867 unregister_netdevice_many(&list_kill);
1868 return ERR_PTR(err);
1869}
1870EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1871
1872static int geneve_netdevice_event(struct notifier_block *unused,
1873 unsigned long event, void *ptr)
1874{
1875 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1876
1877 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
1878 geneve_offload_rx_ports(dev, true);
1879 else if (event == NETDEV_UDP_TUNNEL_DROP_INFO)
1880 geneve_offload_rx_ports(dev, false);
1881
1882 return NOTIFY_DONE;
1883}
1884
1885static struct notifier_block geneve_notifier_block __read_mostly = {
1886 .notifier_call = geneve_netdevice_event,
1887};
1888
1889static __net_init int geneve_init_net(struct net *net)
1890{
1891 struct geneve_net *gn = net_generic(net, geneve_net_id);
1892
1893 INIT_LIST_HEAD(&gn->geneve_list);
1894 INIT_LIST_HEAD(&gn->sock_list);
1895 return 0;
1896}
1897
1898static void geneve_destroy_tunnels(struct net *net, struct list_head *head)
1899{
1900 struct geneve_net *gn = net_generic(net, geneve_net_id);
1901 struct geneve_dev *geneve, *next;
1902 struct net_device *dev, *aux;
1903
1904
1905 for_each_netdev_safe(net, dev, aux)
1906 if (dev->rtnl_link_ops == &geneve_link_ops)
1907 unregister_netdevice_queue(dev, head);
1908
1909
1910 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1911
1912
1913
1914 if (!net_eq(dev_net(geneve->dev), net))
1915 unregister_netdevice_queue(geneve->dev, head);
1916 }
1917}
1918
1919static void __net_exit geneve_exit_batch_net(struct list_head *net_list)
1920{
1921 struct net *net;
1922 LIST_HEAD(list);
1923
1924 rtnl_lock();
1925 list_for_each_entry(net, net_list, exit_list)
1926 geneve_destroy_tunnels(net, &list);
1927
1928
1929 unregister_netdevice_many(&list);
1930 rtnl_unlock();
1931
1932 list_for_each_entry(net, net_list, exit_list) {
1933 const struct geneve_net *gn = net_generic(net, geneve_net_id);
1934
1935 WARN_ON_ONCE(!list_empty(&gn->sock_list));
1936 }
1937}
1938
1939static struct pernet_operations geneve_net_ops = {
1940 .init = geneve_init_net,
1941 .exit_batch = geneve_exit_batch_net,
1942 .id = &geneve_net_id,
1943 .size = sizeof(struct geneve_net),
1944};
1945
1946static int __init geneve_init_module(void)
1947{
1948 int rc;
1949
1950 rc = register_pernet_subsys(&geneve_net_ops);
1951 if (rc)
1952 goto out1;
1953
1954 rc = register_netdevice_notifier(&geneve_notifier_block);
1955 if (rc)
1956 goto out2;
1957
1958 rc = rtnl_link_register(&geneve_link_ops);
1959 if (rc)
1960 goto out3;
1961
1962 return 0;
1963out3:
1964 unregister_netdevice_notifier(&geneve_notifier_block);
1965out2:
1966 unregister_pernet_subsys(&geneve_net_ops);
1967out1:
1968 return rc;
1969}
1970late_initcall(geneve_init_module);
1971
1972static void __exit geneve_cleanup_module(void)
1973{
1974 rtnl_link_unregister(&geneve_link_ops);
1975 unregister_netdevice_notifier(&geneve_notifier_block);
1976 unregister_pernet_subsys(&geneve_net_ops);
1977}
1978module_exit(geneve_cleanup_module);
1979
1980MODULE_LICENSE("GPL");
1981MODULE_VERSION(GENEVE_NETDEV_VER);
1982MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1983MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1984MODULE_ALIAS_RTNL_LINK("geneve");
1985
