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Commit | Line | Data |
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a19920cc | 1 | /* |
e23775f2 | 2 | * GENEVE: Generic Network Virtualization Encapsulation |
a19920cc | 3 | * |
e23775f2 | 4 | * Copyright (c) 2015 Red Hat, Inc. |
a19920cc | 5 | * |
e23775f2 PS |
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. | |
a19920cc JG |
9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
a19920cc | 14 | #include <linux/module.h> |
a19920cc | 15 | #include <linux/netdevice.h> |
a19920cc | 16 | #include <linux/etherdevice.h> |
e23775f2 PS |
17 | #include <linux/hash.h> |
18 | #include <linux/if_link.h> | |
8063e095 | 19 | #include <linux/if_vlan.h> |
e23775f2 PS |
20 | |
21 | #include <net/dst_metadata.h> | |
a19920cc JG |
22 | #include <net/net_namespace.h> |
23 | #include <net/netns/generic.h> | |
e23775f2 | 24 | #include <net/rtnetlink.h> |
a19920cc JG |
25 | #include <net/geneve.h> |
26 | #include <net/protocol.h> | |
a19920cc | 27 | |
a19920cc | 28 | #include "gso.h" |
e23775f2 PS |
29 | #include "vport-netdev.h" |
30 | #include "compat.h" | |
31 | ||
32 | #ifndef HAVE_METADATA_DST | |
33 | #define GENEVE_NETDEV_VER "0.6" | |
34 | ||
35 | #define GENEVE_UDP_PORT 6081 | |
36 | ||
37 | #define GENEVE_N_VID (1u << 24) | |
38 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
a19920cc | 39 | |
e23775f2 PS |
40 | #define VNI_HASH_BITS 10 |
41 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
42 | ||
43 | #define GENEVE_VER 0 | |
44 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
45 | ||
46 | /* per-network namespace private data for this module */ | |
47 | struct geneve_net { | |
48 | struct list_head geneve_list; | |
49 | struct list_head sock_list; | |
50 | }; | |
51 | ||
52 | static int geneve_net_id; | |
53 | ||
54 | /* Pseudo network device */ | |
55 | struct geneve_dev { | |
56 | struct hlist_node hlist; /* vni hash table */ | |
57 | struct net *net; /* netns for packet i/o */ | |
58 | struct net_device *dev; /* netdev for geneve tunnel */ | |
59 | struct geneve_sock *sock; /* socket used for geneve tunnel */ | |
60 | u8 vni[3]; /* virtual network ID for tunnel */ | |
61 | u8 ttl; /* TTL override */ | |
62 | u8 tos; /* TOS override */ | |
63 | struct sockaddr_in remote; /* IPv4 address for link partner */ | |
64 | struct list_head next; /* geneve's per namespace list */ | |
65 | __be16 dst_port; | |
66 | bool collect_md; | |
67 | }; | |
68 | ||
69 | struct geneve_sock { | |
70 | bool collect_md; | |
71 | struct list_head list; | |
72 | struct socket *sock; | |
73 | struct rcu_head rcu; | |
74 | int refcnt; | |
75 | #ifdef HAVE_UDP_OFFLOAD | |
76 | struct udp_offload udp_offloads; | |
77 | #endif | |
78 | struct hlist_head vni_list[VNI_HASH_SIZE]; | |
79 | }; | |
80 | ||
81 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
a19920cc | 82 | { |
e23775f2 | 83 | __u32 vnid; |
a19920cc | 84 | |
e23775f2 PS |
85 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; |
86 | return hash_32(vnid, VNI_HASH_BITS); | |
a19920cc JG |
87 | } |
88 | ||
e23775f2 | 89 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
a19920cc | 90 | { |
e23775f2 PS |
91 | #ifdef __BIG_ENDIAN |
92 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
93 | #else | |
94 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
95 | ((__force u64)vni[1] << 48) | | |
96 | ((__force u64)vni[2] << 56)); | |
97 | #endif | |
98 | } | |
99 | ||
100 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, | |
101 | __be32 addr, u8 vni[]) | |
102 | { | |
103 | struct hlist_head *vni_list_head; | |
104 | struct geneve_dev *geneve; | |
105 | __u32 hash; | |
106 | ||
107 | /* Find the device for this VNI */ | |
108 | hash = geneve_net_vni_hash(vni); | |
109 | vni_list_head = &gs->vni_list[hash]; | |
110 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
111 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
112 | addr == geneve->remote.sin_addr.s_addr) | |
113 | return geneve; | |
114 | } | |
115 | return NULL; | |
116 | } | |
117 | ||
118 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) | |
119 | { | |
120 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
121 | } | |
122 | ||
123 | /* geneve receive/decap routine */ | |
124 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
125 | { | |
126 | struct genevehdr *gnvh = geneve_hdr(skb); | |
127 | struct metadata_dst *tun_dst; | |
128 | struct geneve_dev *geneve = NULL; | |
e23775f2 | 129 | struct pcpu_sw_netstats *stats; |
e23775f2 PS |
130 | struct iphdr *iph; |
131 | u8 *vni; | |
132 | __be32 addr; | |
a19920cc | 133 | int err; |
e23775f2 PS |
134 | union { |
135 | struct metadata_dst dst; | |
136 | char buf[sizeof(struct metadata_dst) + 256]; | |
137 | } buf; | |
a19920cc | 138 | |
e23775f2 | 139 | iph = ip_hdr(skb); /* outer IP header... */ |
a19920cc | 140 | |
e23775f2 PS |
141 | if (gs->collect_md) { |
142 | static u8 zero_vni[3]; | |
143 | ||
144 | vni = zero_vni; | |
145 | addr = 0; | |
146 | } else { | |
147 | vni = gnvh->vni; | |
148 | addr = iph->saddr; | |
a19920cc JG |
149 | } |
150 | ||
e23775f2 PS |
151 | geneve = geneve_lookup(gs, addr, vni); |
152 | if (!geneve) | |
153 | goto drop; | |
a19920cc | 154 | |
e23775f2 PS |
155 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
156 | __be16 flags; | |
b13c9440 | 157 | |
e23775f2 PS |
158 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | |
159 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
160 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
a19920cc | 161 | |
e23775f2 PS |
162 | tun_dst = &buf.dst; |
163 | ovs_udp_tun_rx_dst(&tun_dst->u.tun_info, skb, AF_INET, flags, | |
164 | vni_to_tunnel_id(gnvh->vni), gnvh->opt_len * 4); | |
165 | /* Update tunnel dst according to Geneve options. */ | |
166 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, | |
167 | gnvh->options, gnvh->opt_len * 4); | |
168 | } else { | |
169 | /* Drop packets w/ critical options, | |
170 | * since we don't support any... | |
171 | */ | |
172 | tun_dst = NULL; | |
173 | if (gnvh->critical) | |
174 | goto drop; | |
175 | } | |
176 | ||
177 | skb_reset_mac_header(skb); | |
178 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
179 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
180 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
181 | ||
182 | if (tun_dst) | |
183 | ovs_skb_dst_set(skb, &tun_dst->dst); | |
184 | else | |
185 | goto drop; | |
186 | /* Ignore packet loops (and multicast echo) */ | |
187 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
188 | goto drop; | |
189 | ||
190 | skb_reset_network_header(skb); | |
191 | ||
192 | err = IP_ECN_decapsulate(iph, skb); | |
193 | ||
194 | if (unlikely(err)) { | |
195 | if (err > 1) { | |
196 | ++geneve->dev->stats.rx_frame_errors; | |
197 | ++geneve->dev->stats.rx_errors; | |
198 | goto drop; | |
199 | } | |
200 | } | |
a19920cc | 201 | |
e23775f2 PS |
202 | stats = this_cpu_ptr((struct pcpu_sw_netstats __percpu *)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); | |
e23775f2 PS |
207 | netdev_port_receive(skb, &tun_dst->u.tun_info); |
208 | return; | |
209 | drop: | |
210 | /* Consume bad packet */ | |
211 | kfree_skb(skb); | |
212 | } | |
213 | ||
e23775f2 PS |
214 | /* Setup stats when device is created */ |
215 | static int geneve_init(struct net_device *dev) | |
216 | { | |
217 | dev->tstats = (typeof(dev->tstats)) netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
218 | if (!dev->tstats) | |
219 | return -ENOMEM; | |
220 | ||
221 | return 0; | |
a19920cc | 222 | } |
e23775f2 PS |
223 | |
224 | static void geneve_uninit(struct net_device *dev) | |
225 | { | |
226 | free_percpu(dev->tstats); | |
227 | } | |
a19920cc JG |
228 | |
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); | |
a19920cc JG |
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 | ||
e23775f2 | 257 | geneve_rx(gs, skb); |
a19920cc JG |
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 | ||
e23775f2 PS |
296 | #ifdef HAVE_UDP_OFFLOAD |
297 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
298 | { | |
299 | struct sock *sk = gs->sock->sk; | |
300 | sa_family_t sa_family = sk->sk_family; | |
301 | int err; | |
302 | ||
303 | if (sa_family == AF_INET) { | |
304 | err = udp_add_offload(&gs->udp_offloads); | |
305 | if (err) | |
306 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
307 | err); | |
308 | } | |
309 | } | |
310 | ||
311 | static int geneve_hlen(struct genevehdr *gh) | |
312 | { | |
313 | return sizeof(*gh) + gh->opt_len * 4; | |
314 | } | |
315 | ||
316 | #ifndef HAVE_UDP_OFFLOAD_ARG_UOFF | |
317 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
318 | struct sk_buff *skb) | |
319 | #else | |
320 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
321 | struct sk_buff *skb, | |
322 | struct udp_offload *uoff) | |
323 | #endif | |
324 | { | |
325 | struct sk_buff *p, **pp = NULL; | |
326 | struct genevehdr *gh, *gh2; | |
327 | unsigned int hlen, gh_len, off_gnv; | |
328 | const struct packet_offload *ptype; | |
329 | __be16 type; | |
330 | int flush = 1; | |
331 | ||
332 | off_gnv = skb_gro_offset(skb); | |
333 | hlen = off_gnv + sizeof(*gh); | |
334 | gh = skb_gro_header_fast(skb, off_gnv); | |
335 | if (skb_gro_header_hard(skb, hlen)) { | |
336 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
337 | if (unlikely(!gh)) | |
338 | goto out; | |
339 | } | |
340 | ||
341 | if (gh->ver != GENEVE_VER || gh->oam) | |
342 | goto out; | |
343 | gh_len = geneve_hlen(gh); | |
344 | ||
345 | hlen = off_gnv + gh_len; | |
346 | if (skb_gro_header_hard(skb, hlen)) { | |
347 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
348 | if (unlikely(!gh)) | |
349 | goto out; | |
350 | } | |
351 | ||
352 | flush = 0; | |
353 | ||
354 | for (p = *head; p; p = p->next) { | |
355 | if (!NAPI_GRO_CB(p)->same_flow) | |
356 | continue; | |
357 | ||
358 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
359 | if (gh->opt_len != gh2->opt_len || | |
360 | memcmp(gh, gh2, gh_len)) { | |
361 | NAPI_GRO_CB(p)->same_flow = 0; | |
362 | continue; | |
363 | } | |
364 | } | |
365 | ||
366 | type = gh->proto_type; | |
367 | ||
368 | rcu_read_lock(); | |
369 | ptype = gro_find_receive_by_type(type); | |
370 | if (!ptype) { | |
371 | flush = 1; | |
372 | goto out_unlock; | |
373 | } | |
374 | ||
375 | skb_gro_pull(skb, gh_len); | |
376 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
377 | pp = ptype->callbacks.gro_receive(head, skb); | |
378 | ||
379 | out_unlock: | |
380 | rcu_read_unlock(); | |
381 | out: | |
382 | NAPI_GRO_CB(skb)->flush |= flush; | |
383 | ||
384 | return pp; | |
385 | } | |
386 | ||
387 | #ifndef HAVE_UDP_OFFLOAD_ARG_UOFF | |
388 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff) | |
389 | #else | |
390 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
391 | struct udp_offload *uoff) | |
392 | #endif | |
393 | { | |
394 | struct genevehdr *gh; | |
395 | struct packet_offload *ptype; | |
396 | __be16 type; | |
397 | int gh_len; | |
398 | int err = -ENOSYS; | |
399 | ||
400 | udp_tunnel_gro_complete(skb, nhoff); | |
401 | ||
402 | gh = (struct genevehdr *)(skb->data + nhoff); | |
403 | gh_len = geneve_hlen(gh); | |
404 | type = gh->proto_type; | |
405 | ||
406 | rcu_read_lock(); | |
407 | ptype = gro_find_complete_by_type(type); | |
408 | if (ptype) | |
409 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
410 | ||
411 | rcu_read_unlock(); | |
412 | return err; | |
413 | } | |
414 | #endif | |
415 | ||
a19920cc JG |
416 | /* Create new listen socket if needed */ |
417 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
a19920cc JG |
418 | bool ipv6) |
419 | { | |
e23775f2 | 420 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
a19920cc JG |
421 | struct geneve_sock *gs; |
422 | struct socket *sock; | |
423 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
e23775f2 | 424 | int h; |
a19920cc JG |
425 | |
426 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
427 | if (!gs) | |
428 | return ERR_PTR(-ENOMEM); | |
429 | ||
430 | sock = geneve_create_sock(net, ipv6, port); | |
431 | if (IS_ERR(sock)) { | |
432 | kfree(gs); | |
433 | return ERR_CAST(sock); | |
434 | } | |
435 | ||
436 | gs->sock = sock; | |
e23775f2 PS |
437 | gs->refcnt = 1; |
438 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
439 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
a19920cc | 440 | |
e23775f2 PS |
441 | /* Initialize the geneve udp offloads structure */ |
442 | #ifdef HAVE_UDP_OFFLOAD | |
443 | gs->udp_offloads.port = port; | |
444 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
445 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
446 | geneve_notify_add_rx_port(gs); | |
447 | #endif | |
a19920cc JG |
448 | /* Mark socket as an encapsulation socket */ |
449 | tunnel_cfg.sk_user_data = gs; | |
450 | tunnel_cfg.encap_type = 1; | |
451 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
452 | tunnel_cfg.encap_destroy = NULL; | |
453 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e23775f2 | 454 | list_add(&gs->list, &gn->sock_list); |
a19920cc JG |
455 | return gs; |
456 | } | |
457 | ||
e23775f2 | 458 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) |
a19920cc | 459 | { |
e23775f2 PS |
460 | #ifdef HAVE_UDP_OFFLOAD |
461 | struct sock *sk = gs->sock->sk; | |
462 | sa_family_t sa_family = sk->sk_family; | |
463 | ||
464 | if (sa_family == AF_INET) | |
465 | udp_del_offload(&gs->udp_offloads); | |
466 | #endif | |
a19920cc JG |
467 | } |
468 | ||
e23775f2 | 469 | static void free_gs_rcu(struct rcu_head *rcu) |
a19920cc JG |
470 | { |
471 | struct geneve_sock *gs = container_of(rcu, struct geneve_sock, rcu); | |
472 | ||
473 | kfree(gs); | |
474 | } | |
475 | ||
e23775f2 | 476 | static void geneve_sock_release(struct geneve_sock *gs) |
a19920cc | 477 | { |
e23775f2 PS |
478 | if (--gs->refcnt) |
479 | return; | |
480 | ||
481 | list_del(&gs->list); | |
482 | geneve_notify_del_rx_port(gs); | |
a19920cc | 483 | udp_tunnel_sock_release(gs->sock); |
e23775f2 | 484 | call_rcu(&gs->rcu, free_gs_rcu); |
a19920cc | 485 | } |
15c69d2d | 486 | |
e23775f2 PS |
487 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
488 | __be16 dst_port) | |
489 | { | |
490 | struct geneve_sock *gs; | |
491 | ||
492 | list_for_each_entry(gs, &gn->sock_list, list) { | |
8063e095 | 493 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && |
e23775f2 PS |
494 | inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) { |
495 | return gs; | |
496 | } | |
497 | } | |
498 | return NULL; | |
499 | } | |
500 | ||
501 | static int geneve_open(struct net_device *dev) | |
502 | { | |
503 | struct geneve_dev *geneve = netdev_priv(dev); | |
504 | struct net *net = geneve->net; | |
505 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
506 | struct geneve_sock *gs; | |
507 | __u32 hash; | |
508 | ||
509 | gs = geneve_find_sock(gn, geneve->dst_port); | |
510 | if (gs) { | |
511 | gs->refcnt++; | |
512 | goto out; | |
513 | } | |
514 | ||
515 | gs = geneve_socket_create(net, geneve->dst_port, false); | |
516 | if (IS_ERR(gs)) | |
517 | return PTR_ERR(gs); | |
518 | ||
519 | out: | |
520 | gs->collect_md = geneve->collect_md; | |
521 | geneve->sock = gs; | |
522 | ||
523 | hash = geneve_net_vni_hash(geneve->vni); | |
524 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | static int geneve_stop(struct net_device *dev) | |
529 | { | |
530 | struct geneve_dev *geneve = netdev_priv(dev); | |
531 | struct geneve_sock *gs = geneve->sock; | |
532 | ||
533 | if (!hlist_unhashed(&geneve->hlist)) | |
534 | hlist_del_rcu(&geneve->hlist); | |
535 | geneve_sock_release(gs); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, | |
540 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
541 | bool csum) | |
542 | { | |
543 | struct genevehdr *gnvh; | |
544 | int min_headroom; | |
545 | int err; | |
546 | ||
8063e095 | 547 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
e23775f2 PS |
548 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr) |
549 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); | |
550 | err = skb_cow_head(skb, min_headroom); | |
551 | if (unlikely(err)) { | |
552 | kfree_skb(skb); | |
553 | goto free_rt; | |
554 | } | |
555 | ||
556 | skb = vlan_hwaccel_push_inside(skb); | |
557 | if (!skb) { | |
558 | err = -ENOMEM; | |
559 | goto free_rt; | |
560 | } | |
561 | ||
562 | skb = udp_tunnel_handle_offloads(skb, csum, 0, false); | |
563 | if (IS_ERR(skb)) { | |
564 | err = PTR_ERR(skb); | |
565 | goto free_rt; | |
566 | } | |
567 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
568 | gnvh->ver = GENEVE_VER; | |
569 | gnvh->opt_len = opt_len / 4; | |
570 | gnvh->oam = !!(tun_flags & TUNNEL_OAM); | |
571 | gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
572 | gnvh->rsvd1 = 0; | |
573 | memcpy(gnvh->vni, vni, 3); | |
574 | gnvh->proto_type = htons(ETH_P_TEB); | |
575 | gnvh->rsvd2 = 0; | |
576 | memcpy(gnvh->options, opt, opt_len); | |
577 | ||
578 | ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
579 | return 0; | |
580 | ||
581 | free_rt: | |
582 | ip_rt_put(rt); | |
583 | return err; | |
584 | } | |
585 | ||
586 | static struct rtable *geneve_get_rt(struct sk_buff *skb, | |
587 | struct net_device *dev, | |
588 | struct flowi4 *fl4, | |
589 | struct ip_tunnel_info *info) | |
590 | { | |
591 | struct geneve_dev *geneve = netdev_priv(dev); | |
592 | struct rtable *rt = NULL; | |
593 | __u8 tos; | |
594 | ||
595 | memset(fl4, 0, sizeof(*fl4)); | |
596 | fl4->flowi4_mark = skb->mark; | |
597 | fl4->flowi4_proto = IPPROTO_UDP; | |
598 | ||
599 | if (info) { | |
600 | fl4->daddr = info->key.u.ipv4.dst; | |
601 | fl4->saddr = info->key.u.ipv4.src; | |
602 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
603 | } else { | |
604 | tos = geneve->tos; | |
605 | if (tos == 1) { | |
606 | const struct iphdr *iip = ip_hdr(skb); | |
607 | ||
608 | tos = ip_tunnel_get_dsfield(iip, skb); | |
609 | } | |
610 | ||
611 | fl4->flowi4_tos = RT_TOS(tos); | |
612 | fl4->daddr = geneve->remote.sin_addr.s_addr; | |
613 | } | |
614 | ||
615 | rt = ip_route_output_key(geneve->net, fl4); | |
616 | if (IS_ERR(rt)) { | |
617 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
aad7cb91 | 618 | return ERR_PTR(-ENETUNREACH); |
e23775f2 | 619 | } |
8063e095 | 620 | if (rt->dst.dev == dev) { /* is this necessary? */ |
e23775f2 | 621 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); |
e23775f2 | 622 | ip_rt_put(rt); |
aad7cb91 | 623 | return ERR_PTR(-ELOOP); |
e23775f2 PS |
624 | } |
625 | return rt; | |
626 | } | |
627 | ||
628 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ | |
629 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
630 | { | |
631 | #ifdef __BIG_ENDIAN | |
632 | vni[0] = (__force __u8)(tun_id >> 16); | |
633 | vni[1] = (__force __u8)(tun_id >> 8); | |
634 | vni[2] = (__force __u8)tun_id; | |
635 | #else | |
636 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
637 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
638 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
639 | #endif | |
640 | } | |
641 | ||
642 | netdev_tx_t rpl_geneve_xmit(struct sk_buff *skb) | |
643 | { | |
644 | struct net_device *dev = skb->dev; | |
645 | struct geneve_dev *geneve = netdev_priv(dev); | |
646 | struct geneve_sock *gs = geneve->sock; | |
647 | struct ip_tunnel_info *info = NULL; | |
648 | struct rtable *rt = NULL; | |
649 | const struct iphdr *iip; /* interior IP header */ | |
aad7cb91 | 650 | int err = -EINVAL; |
e23775f2 PS |
651 | struct flowi4 fl4; |
652 | __u8 tos, ttl; | |
653 | __be16 sport; | |
654 | bool udp_csum; | |
655 | __be16 df; | |
e23775f2 PS |
656 | |
657 | if (geneve->collect_md) { | |
658 | info = skb_tunnel_info(skb); | |
659 | if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) { | |
660 | netdev_dbg(dev, "no tunnel metadata\n"); | |
661 | goto tx_error; | |
662 | } | |
663 | if (info && ip_tunnel_info_af(info) != AF_INET) | |
664 | goto tx_error; | |
665 | } | |
666 | ||
667 | rt = geneve_get_rt(skb, dev, &fl4, info); | |
668 | if (IS_ERR(rt)) { | |
669 | netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); | |
aad7cb91 | 670 | err = PTR_ERR(rt); |
e23775f2 PS |
671 | goto tx_error; |
672 | } | |
673 | ||
674 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
675 | skb_reset_mac_header(skb); | |
676 | ||
677 | iip = ip_hdr(skb); | |
678 | ||
679 | if (info) { | |
680 | const struct ip_tunnel_key *key = &info->key; | |
681 | u8 *opts = NULL; | |
682 | u8 vni[3]; | |
683 | ||
684 | tunnel_id_to_vni(key->tun_id, vni); | |
685 | if (key->tun_flags & TUNNEL_GENEVE_OPT) | |
686 | opts = ip_tunnel_info_opts(info); | |
687 | ||
688 | udp_csum = !!(key->tun_flags & TUNNEL_CSUM); | |
689 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, | |
690 | info->options_len, opts, udp_csum); | |
691 | if (unlikely(err)) | |
692 | goto err; | |
693 | ||
694 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); | |
695 | ttl = key->ttl; | |
696 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
697 | } else { | |
698 | udp_csum = false; | |
699 | err = geneve_build_skb(rt, skb, 0, geneve->vni, | |
700 | 0, NULL, udp_csum); | |
701 | if (unlikely(err)) | |
702 | goto err; | |
703 | ||
704 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); | |
705 | ttl = geneve->ttl; | |
706 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
707 | ttl = 1; | |
8063e095 | 708 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
e23775f2 PS |
709 | df = 0; |
710 | } | |
711 | err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr, | |
712 | tos, ttl, df, sport, geneve->dst_port, | |
713 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
714 | !udp_csum); | |
715 | ||
716 | iptunnel_xmit_stats(err, &dev->stats, (struct pcpu_sw_netstats __percpu *) dev->tstats); | |
717 | return NETDEV_TX_OK; | |
718 | ||
719 | tx_error: | |
720 | dev_kfree_skb(skb); | |
721 | err: | |
aad7cb91 PS |
722 | if (err == -ELOOP) |
723 | dev->stats.collisions++; | |
724 | else if (err == -ENETUNREACH) | |
725 | dev->stats.tx_carrier_errors++; | |
726 | else | |
727 | dev->stats.tx_errors++; | |
e23775f2 PS |
728 | return NETDEV_TX_OK; |
729 | } | |
730 | EXPORT_SYMBOL(rpl_geneve_xmit); | |
731 | ||
732 | static netdev_tx_t geneve_dev_xmit(struct sk_buff *skb, struct net_device *dev) | |
733 | { | |
734 | /* Drop All packets coming from networking stack. OVS-CB is | |
735 | * not initialized for these packets. | |
736 | */ | |
737 | ||
738 | dev_kfree_skb(skb); | |
739 | dev->stats.tx_dropped++; | |
740 | return NETDEV_TX_OK; | |
741 | } | |
742 | ||
917b3b45 | 743 | static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) |
ef1d4fc0 | 744 | { |
917b3b45 DW |
745 | /* The max_mtu calculation does not take account of GENEVE |
746 | * options, to avoid excluding potentially valid | |
747 | * configurations. | |
ef1d4fc0 | 748 | */ |
917b3b45 DW |
749 | int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - sizeof(struct iphdr) |
750 | - dev->hard_header_len; | |
751 | ||
752 | if (new_mtu < 68) | |
ef1d4fc0 | 753 | return -EINVAL; |
917b3b45 DW |
754 | |
755 | if (new_mtu > max_mtu) { | |
756 | if (strict) | |
757 | return -EINVAL; | |
758 | ||
759 | new_mtu = max_mtu; | |
760 | } | |
761 | ||
ef1d4fc0 DW |
762 | dev->mtu = new_mtu; |
763 | return 0; | |
764 | } | |
765 | ||
917b3b45 DW |
766 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
767 | { | |
768 | return __geneve_change_mtu(dev, new_mtu, true); | |
769 | } | |
770 | ||
aad7cb91 PS |
771 | int ovs_geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
772 | { | |
773 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
774 | struct geneve_dev *geneve = netdev_priv(dev); | |
775 | struct rtable *rt; | |
776 | struct flowi4 fl4; | |
777 | ||
778 | if (ip_tunnel_info_af(info) != AF_INET) | |
779 | return -EINVAL; | |
780 | ||
781 | rt = geneve_get_rt(skb, dev, &fl4, info); | |
782 | if (IS_ERR(rt)) | |
783 | return PTR_ERR(rt); | |
784 | ||
785 | ip_rt_put(rt); | |
786 | info->key.u.ipv4.src = fl4.saddr; | |
787 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, | |
788 | 1, USHRT_MAX, true); | |
789 | info->key.tp_dst = geneve->dst_port; | |
790 | return 0; | |
791 | } | |
792 | EXPORT_SYMBOL_GPL(ovs_geneve_fill_metadata_dst); | |
793 | ||
e23775f2 | 794 | static const struct net_device_ops geneve_netdev_ops = { |
e23775f2 PS |
795 | .ndo_init = geneve_init, |
796 | .ndo_uninit = geneve_uninit, | |
797 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
e23775f2 PS |
798 | .ndo_open = geneve_open, |
799 | .ndo_stop = geneve_stop, | |
800 | .ndo_start_xmit = geneve_dev_xmit, | |
ef1d4fc0 | 801 | .ndo_change_mtu = geneve_change_mtu, |
e23775f2 PS |
802 | .ndo_validate_addr = eth_validate_addr, |
803 | .ndo_set_mac_address = eth_mac_addr, | |
aad7cb91 PS |
804 | #ifdef HAVE_NDO_FILL_METADATA_DST |
805 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, | |
806 | #endif | |
e23775f2 PS |
807 | }; |
808 | ||
809 | static void geneve_get_drvinfo(struct net_device *dev, | |
810 | struct ethtool_drvinfo *drvinfo) | |
811 | { | |
812 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
813 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
814 | } | |
815 | ||
816 | static const struct ethtool_ops geneve_ethtool_ops = { | |
817 | .get_drvinfo = geneve_get_drvinfo, | |
818 | .get_link = ethtool_op_get_link, | |
819 | }; | |
820 | ||
821 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
822 | static struct device_type geneve_type = { | |
823 | .name = "geneve", | |
824 | }; | |
825 | ||
826 | /* Initialize the device structure. */ | |
827 | static void geneve_setup(struct net_device *dev) | |
828 | { | |
829 | ether_setup(dev); | |
830 | ||
831 | dev->netdev_ops = &geneve_netdev_ops; | |
832 | dev->ethtool_ops = &geneve_ethtool_ops; | |
833 | dev->destructor = free_netdev; | |
834 | ||
835 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
836 | ||
837 | dev->features |= NETIF_F_LLTX; | |
838 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
839 | dev->features |= NETIF_F_RXCSUM; | |
840 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
841 | ||
842 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) | |
843 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
844 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
845 | #endif | |
846 | #if 0 | |
847 | /* Not required */ | |
848 | netif_keep_dst(dev); | |
849 | #endif | |
850 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; | |
851 | eth_hw_addr_random(dev); | |
852 | } | |
853 | ||
854 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
855 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
856 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
857 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, | |
858 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, | |
859 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, | |
860 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, | |
861 | }; | |
862 | ||
863 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
864 | { | |
865 | if (tb[IFLA_ADDRESS]) { | |
866 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
867 | return -EINVAL; | |
868 | ||
869 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
870 | return -EADDRNOTAVAIL; | |
871 | } | |
872 | ||
873 | if (!data) | |
874 | return -EINVAL; | |
875 | ||
876 | if (data[IFLA_GENEVE_ID]) { | |
877 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
878 | ||
879 | if (vni >= GENEVE_VID_MASK) | |
880 | return -ERANGE; | |
881 | } | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, | |
887 | __be16 dst_port, | |
888 | __be32 rem_addr, | |
889 | u8 vni[], | |
890 | bool *tun_on_same_port, | |
891 | bool *tun_collect_md) | |
892 | { | |
893 | struct geneve_dev *geneve, *t; | |
894 | ||
895 | *tun_on_same_port = false; | |
896 | *tun_collect_md = false; | |
897 | t = NULL; | |
898 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
899 | if (geneve->dst_port == dst_port) { | |
900 | *tun_collect_md = geneve->collect_md; | |
901 | *tun_on_same_port = true; | |
902 | } | |
903 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
904 | rem_addr == geneve->remote.sin_addr.s_addr && | |
905 | dst_port == geneve->dst_port) | |
906 | t = geneve; | |
907 | } | |
908 | return t; | |
909 | } | |
910 | ||
911 | static int geneve_configure(struct net *net, struct net_device *dev, | |
912 | __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos, | |
913 | __be16 dst_port, bool metadata) | |
914 | { | |
915 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
916 | struct geneve_dev *t, *geneve = netdev_priv(dev); | |
917 | bool tun_collect_md, tun_on_same_port; | |
918 | int err; | |
919 | ||
920 | if (metadata) { | |
921 | if (rem_addr || vni || tos || ttl) | |
922 | return -EINVAL; | |
923 | } | |
924 | ||
925 | geneve->net = net; | |
926 | geneve->dev = dev; | |
927 | ||
928 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; | |
929 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
930 | geneve->vni[2] = vni & 0x000000ff; | |
931 | ||
932 | geneve->remote.sin_addr.s_addr = rem_addr; | |
933 | if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr))) | |
934 | return -EINVAL; | |
935 | ||
936 | geneve->ttl = ttl; | |
937 | geneve->tos = tos; | |
938 | geneve->dst_port = dst_port; | |
939 | geneve->collect_md = metadata; | |
940 | ||
941 | t = geneve_find_dev(gn, dst_port, rem_addr, geneve->vni, | |
942 | &tun_on_same_port, &tun_collect_md); | |
943 | if (t) | |
944 | return -EBUSY; | |
945 | ||
946 | if (metadata) { | |
947 | if (tun_on_same_port) | |
948 | return -EPERM; | |
949 | } else { | |
950 | if (tun_collect_md) | |
951 | return -EPERM; | |
952 | } | |
953 | ||
954 | err = register_netdevice(dev); | |
955 | if (err) | |
956 | return err; | |
957 | ||
958 | list_add(&geneve->next, &gn->geneve_list); | |
959 | return 0; | |
960 | } | |
961 | ||
962 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) | |
963 | static int geneve_newlink(struct net_device *dev, | |
964 | struct nlattr *tb[], struct nlattr *data[]) | |
965 | { | |
966 | struct net *net = &init_net; | |
967 | #else | |
968 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
969 | struct nlattr *tb[], struct nlattr *data[]) | |
970 | { | |
971 | #endif | |
972 | __be16 dst_port = htons(GENEVE_UDP_PORT); | |
973 | __u8 ttl = 0, tos = 0; | |
974 | bool metadata = false; | |
975 | __be32 rem_addr; | |
976 | __u32 vni; | |
977 | ||
978 | if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE]) | |
979 | return -EINVAL; | |
980 | ||
981 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
982 | rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
983 | ||
984 | if (data[IFLA_GENEVE_TTL]) | |
985 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); | |
986 | ||
987 | if (data[IFLA_GENEVE_TOS]) | |
988 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); | |
989 | ||
990 | if (data[IFLA_GENEVE_PORT]) | |
991 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); | |
992 | ||
993 | if (data[IFLA_GENEVE_COLLECT_METADATA]) | |
994 | metadata = true; | |
995 | ||
996 | return geneve_configure(net, dev, rem_addr, vni, | |
997 | ttl, tos, dst_port, metadata); | |
998 | } | |
999 | ||
1000 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) | |
1001 | static void geneve_dellink(struct net_device *dev) | |
1002 | #else | |
1003 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1004 | #endif | |
1005 | { | |
1006 | struct geneve_dev *geneve = netdev_priv(dev); | |
1007 | ||
1008 | list_del(&geneve->next); | |
1009 | unregister_netdevice_queue(dev, head); | |
1010 | } | |
1011 | ||
1012 | static size_t geneve_get_size(const struct net_device *dev) | |
1013 | { | |
1014 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
1015 | nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */ | |
1016 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ | |
1017 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ | |
1018 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ | |
1019 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ | |
1020 | 0; | |
1021 | } | |
1022 | ||
1023 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1024 | { | |
1025 | struct geneve_dev *geneve = netdev_priv(dev); | |
1026 | __u32 vni; | |
1027 | ||
1028 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1029 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1030 | goto nla_put_failure; | |
1031 | ||
1032 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1033 | geneve->remote.sin_addr.s_addr)) | |
1034 | goto nla_put_failure; | |
1035 | ||
1036 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || | |
1037 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
1038 | goto nla_put_failure; | |
1039 | ||
1040 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) | |
1041 | goto nla_put_failure; | |
1042 | ||
1043 | if (geneve->collect_md) { | |
1044 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1045 | goto nla_put_failure; | |
1046 | } | |
1047 | ||
1048 | return 0; | |
1049 | ||
1050 | nla_put_failure: | |
1051 | return -EMSGSIZE; | |
1052 | } | |
1053 | ||
1054 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1055 | .kind = "ovs_geneve", | |
1056 | .maxtype = IFLA_GENEVE_MAX, | |
1057 | .policy = geneve_policy, | |
1058 | .priv_size = sizeof(struct geneve_dev), | |
1059 | .setup = geneve_setup, | |
1060 | .validate = geneve_validate, | |
1061 | .newlink = geneve_newlink, | |
1062 | .dellink = geneve_dellink, | |
1063 | .get_size = geneve_get_size, | |
1064 | .fill_info = geneve_fill_info, | |
1065 | }; | |
1066 | ||
1067 | struct net_device *rpl_geneve_dev_create_fb(struct net *net, const char *name, | |
1068 | u8 name_assign_type, u16 dst_port) | |
1069 | { | |
1070 | struct nlattr *tb[IFLA_MAX + 1]; | |
1071 | struct net_device *dev; | |
1072 | int err; | |
1073 | ||
1074 | memset(tb, 0, sizeof(tb)); | |
1075 | dev = rtnl_create_link(net, (char *) name, name_assign_type, | |
1076 | &geneve_link_ops, tb); | |
1077 | if (IS_ERR(dev)) | |
1078 | return dev; | |
1079 | ||
1080 | err = geneve_configure(net, dev, 0, 0, 0, 0, htons(dst_port), true); | |
06f1a61a DW |
1081 | if (err) |
1082 | goto err; | |
1083 | ||
1084 | /* openvswitch users expect packet sizes to be unrestricted, | |
1085 | * so set the largest MTU we can. | |
1086 | */ | |
917b3b45 | 1087 | err = __geneve_change_mtu(dev, IP_MAX_MTU, false); |
06f1a61a DW |
1088 | if (err) |
1089 | goto err; | |
1090 | ||
e23775f2 | 1091 | return dev; |
06f1a61a DW |
1092 | |
1093 | err: | |
1094 | free_netdev(dev); | |
1095 | return ERR_PTR(err); | |
e23775f2 PS |
1096 | } |
1097 | EXPORT_SYMBOL_GPL(rpl_geneve_dev_create_fb); | |
1098 | ||
1099 | static __net_init int geneve_init_net(struct net *net) | |
1100 | { | |
1101 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1102 | ||
1103 | INIT_LIST_HEAD(&gn->geneve_list); | |
1104 | INIT_LIST_HEAD(&gn->sock_list); | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | static void __net_exit geneve_exit_net(struct net *net) | |
1109 | { | |
1110 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1111 | struct geneve_dev *geneve, *next; | |
1112 | struct net_device *dev, *aux; | |
1113 | LIST_HEAD(list); | |
1114 | ||
1115 | rtnl_lock(); | |
1116 | ||
1117 | /* gather any geneve devices that were moved into this ns */ | |
1118 | for_each_netdev_safe(net, dev, aux) | |
1119 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1120 | unregister_netdevice_queue(dev, &list); | |
1121 | ||
1122 | /* now gather any other geneve devices that were created in this ns */ | |
1123 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1124 | /* If geneve->dev is in the same netns, it was already added | |
1125 | * to the list by the previous loop. | |
1126 | */ | |
1127 | if (!net_eq(dev_net(geneve->dev), net)) | |
1128 | unregister_netdevice_queue(geneve->dev, &list); | |
1129 | } | |
1130 | ||
1131 | /* unregister the devices gathered above */ | |
1132 | unregister_netdevice_many(&list); | |
1133 | rtnl_unlock(); | |
1134 | } | |
1135 | ||
1136 | static struct pernet_operations geneve_net_ops = { | |
1137 | .init = geneve_init_net, | |
1138 | .exit = geneve_exit_net, | |
1139 | .id = &geneve_net_id, | |
1140 | .size = sizeof(struct geneve_net), | |
1141 | }; | |
1142 | ||
e23775f2 PS |
1143 | int rpl_geneve_init_module(void) |
1144 | { | |
1145 | int rc; | |
1146 | ||
1147 | rc = register_pernet_subsys(&geneve_net_ops); | |
1148 | if (rc) | |
1149 | goto out1; | |
1150 | ||
1151 | rc = rtnl_link_register(&geneve_link_ops); | |
1152 | if (rc) | |
1153 | goto out2; | |
1154 | ||
1155 | pr_info("Geneve tunneling driver\n"); | |
1156 | return 0; | |
1157 | out2: | |
1158 | unregister_pernet_subsys(&geneve_net_ops); | |
1159 | out1: | |
1160 | return rc; | |
1161 | } | |
1162 | ||
1163 | void rpl_geneve_cleanup_module(void) | |
1164 | { | |
1165 | rtnl_link_unregister(&geneve_link_ops); | |
1166 | unregister_pernet_subsys(&geneve_net_ops); | |
1167 | } | |
1168 | #endif |