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Commit | Line | Data |
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2d07dc79 JL |
1 | /* |
2 | * GENEVE: Generic Network Virtualization Encapsulation | |
3 | * | |
4 | * Copyright (c) 2015 Red Hat, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/hash.h> | |
e305ac6c | 18 | #include <net/dst_metadata.h> |
8e816df8 | 19 | #include <net/gro_cells.h> |
2d07dc79 JL |
20 | #include <net/rtnetlink.h> |
21 | #include <net/geneve.h> | |
371bd106 | 22 | #include <net/protocol.h> |
2d07dc79 JL |
23 | |
24 | #define GENEVE_NETDEV_VER "0.6" | |
25 | ||
26 | #define GENEVE_UDP_PORT 6081 | |
27 | ||
28 | #define GENEVE_N_VID (1u << 24) | |
29 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
30 | ||
31 | #define VNI_HASH_BITS 10 | |
32 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
33 | ||
34 | static bool log_ecn_error = true; | |
35 | module_param(log_ecn_error, bool, 0644); | |
36 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
37 | ||
371bd106 PS |
38 | #define GENEVE_VER 0 |
39 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
40 | ||
2d07dc79 JL |
41 | /* per-network namespace private data for this module */ |
42 | struct geneve_net { | |
371bd106 | 43 | struct list_head geneve_list; |
371bd106 | 44 | struct list_head sock_list; |
2d07dc79 JL |
45 | }; |
46 | ||
371bd106 PS |
47 | static int geneve_net_id; |
48 | ||
2d07dc79 JL |
49 | /* Pseudo network device */ |
50 | struct geneve_dev { | |
51 | struct hlist_node hlist; /* vni hash table */ | |
52 | struct net *net; /* netns for packet i/o */ | |
53 | struct net_device *dev; /* netdev for geneve tunnel */ | |
54 | struct geneve_sock *sock; /* socket used for geneve tunnel */ | |
8760ce58 JL |
55 | u8 vni[3]; /* virtual network ID for tunnel */ |
56 | u8 ttl; /* TTL override */ | |
d8951125 | 57 | u8 tos; /* TOS override */ |
2d07dc79 JL |
58 | struct sockaddr_in remote; /* IPv4 address for link partner */ |
59 | struct list_head next; /* geneve's per namespace list */ | |
cd7918b3 | 60 | __be16 dst_port; |
e305ac6c | 61 | bool collect_md; |
8e816df8 | 62 | struct gro_cells gro_cells; |
2d07dc79 JL |
63 | }; |
64 | ||
371bd106 PS |
65 | struct geneve_sock { |
66 | bool collect_md; | |
371bd106 PS |
67 | struct list_head list; |
68 | struct socket *sock; | |
69 | struct rcu_head rcu; | |
70 | int refcnt; | |
71 | struct udp_offload udp_offloads; | |
66d47003 | 72 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 73 | }; |
2d07dc79 JL |
74 | |
75 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
76 | { | |
77 | __u32 vnid; | |
78 | ||
79 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
80 | return hash_32(vnid, VNI_HASH_BITS); | |
81 | } | |
82 | ||
e305ac6c PS |
83 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
84 | { | |
85 | #ifdef __BIG_ENDIAN | |
86 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
87 | #else | |
88 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
89 | ((__force u64)vni[1] << 48) | | |
90 | ((__force u64)vni[2] << 56)); | |
91 | #endif | |
92 | } | |
93 | ||
66d47003 | 94 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 95 | __be32 addr, u8 vni[]) |
2d07dc79 | 96 | { |
2d07dc79 | 97 | struct hlist_head *vni_list_head; |
e305ac6c | 98 | struct geneve_dev *geneve; |
2d07dc79 JL |
99 | __u32 hash; |
100 | ||
2d07dc79 | 101 | /* Find the device for this VNI */ |
371bd106 | 102 | hash = geneve_net_vni_hash(vni); |
66d47003 | 103 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 104 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 105 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
66d47003 | 106 | addr == geneve->remote.sin_addr.s_addr) |
e305ac6c | 107 | return geneve; |
2d07dc79 | 108 | } |
e305ac6c PS |
109 | return NULL; |
110 | } | |
111 | ||
371bd106 PS |
112 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
113 | { | |
114 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
115 | } | |
116 | ||
e305ac6c PS |
117 | /* geneve receive/decap routine */ |
118 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
119 | { | |
120 | struct genevehdr *gnvh = geneve_hdr(skb); | |
121 | struct metadata_dst *tun_dst = NULL; | |
122 | struct geneve_dev *geneve = NULL; | |
123 | struct pcpu_sw_netstats *stats; | |
e305ac6c | 124 | struct iphdr *iph; |
371bd106 PS |
125 | u8 *vni; |
126 | __be32 addr; | |
e305ac6c PS |
127 | int err; |
128 | ||
08399efc JL |
129 | iph = ip_hdr(skb); /* outer IP header... */ |
130 | ||
371bd106 PS |
131 | if (gs->collect_md) { |
132 | static u8 zero_vni[3]; | |
133 | ||
134 | vni = zero_vni; | |
135 | addr = 0; | |
136 | } else { | |
137 | vni = gnvh->vni; | |
138 | addr = iph->saddr; | |
139 | } | |
140 | ||
66d47003 | 141 | geneve = geneve_lookup(gs, addr, vni); |
2d07dc79 JL |
142 | if (!geneve) |
143 | goto drop; | |
144 | ||
371bd106 | 145 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 146 | __be16 flags; |
e305ac6c PS |
147 | |
148 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
149 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
150 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
151 | ||
152 | tun_dst = udp_tun_rx_dst(skb, AF_INET, flags, | |
153 | vni_to_tunnel_id(gnvh->vni), | |
154 | gnvh->opt_len * 4); | |
155 | if (!tun_dst) | |
156 | goto drop; | |
e305ac6c | 157 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
158 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
159 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
160 | } else { |
161 | /* Drop packets w/ critical options, | |
162 | * since we don't support any... | |
163 | */ | |
164 | if (gnvh->critical) | |
165 | goto drop; | |
166 | } | |
2d07dc79 JL |
167 | |
168 | skb_reset_mac_header(skb); | |
169 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
170 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
171 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
172 | ||
e305ac6c PS |
173 | if (tun_dst) |
174 | skb_dst_set(skb, &tun_dst->dst); | |
175 | ||
2d07dc79 JL |
176 | /* Ignore packet loops (and multicast echo) */ |
177 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
178 | goto drop; | |
179 | ||
180 | skb_reset_network_header(skb); | |
181 | ||
2d07dc79 JL |
182 | err = IP_ECN_decapsulate(iph, skb); |
183 | ||
184 | if (unlikely(err)) { | |
185 | if (log_ecn_error) | |
186 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
187 | &iph->saddr, iph->tos); | |
188 | if (err > 1) { | |
189 | ++geneve->dev->stats.rx_frame_errors; | |
190 | ++geneve->dev->stats.rx_errors; | |
191 | goto drop; | |
192 | } | |
193 | } | |
194 | ||
195 | stats = this_cpu_ptr(geneve->dev->tstats); | |
196 | u64_stats_update_begin(&stats->syncp); | |
197 | stats->rx_packets++; | |
198 | stats->rx_bytes += skb->len; | |
199 | u64_stats_update_end(&stats->syncp); | |
200 | ||
8e816df8 | 201 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
202 | return; |
203 | drop: | |
204 | /* Consume bad packet */ | |
205 | kfree_skb(skb); | |
206 | } | |
207 | ||
208 | /* Setup stats when device is created */ | |
209 | static int geneve_init(struct net_device *dev) | |
210 | { | |
8e816df8 JG |
211 | struct geneve_dev *geneve = netdev_priv(dev); |
212 | int err; | |
213 | ||
2d07dc79 JL |
214 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
215 | if (!dev->tstats) | |
216 | return -ENOMEM; | |
8e816df8 JG |
217 | |
218 | err = gro_cells_init(&geneve->gro_cells, dev); | |
219 | if (err) { | |
220 | free_percpu(dev->tstats); | |
221 | return err; | |
222 | } | |
223 | ||
2d07dc79 JL |
224 | return 0; |
225 | } | |
226 | ||
227 | static void geneve_uninit(struct net_device *dev) | |
228 | { | |
8e816df8 JG |
229 | struct geneve_dev *geneve = netdev_priv(dev); |
230 | ||
231 | gro_cells_destroy(&geneve->gro_cells); | |
2d07dc79 JL |
232 | free_percpu(dev->tstats); |
233 | } | |
234 | ||
371bd106 PS |
235 | /* Callback from net/ipv4/udp.c to receive packets */ |
236 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
237 | { | |
238 | struct genevehdr *geneveh; | |
239 | struct geneve_sock *gs; | |
240 | int opts_len; | |
241 | ||
242 | /* Need Geneve and inner Ethernet header to be present */ | |
243 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
244 | goto error; | |
245 | ||
246 | /* Return packets with reserved bits set */ | |
247 | geneveh = geneve_hdr(skb); | |
248 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
249 | goto error; | |
250 | ||
251 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
252 | goto error; | |
253 | ||
254 | opts_len = geneveh->opt_len * 4; | |
255 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
256 | htons(ETH_P_TEB))) | |
257 | goto drop; | |
258 | ||
259 | gs = rcu_dereference_sk_user_data(sk); | |
260 | if (!gs) | |
261 | goto drop; | |
262 | ||
263 | geneve_rx(gs, skb); | |
264 | return 0; | |
265 | ||
266 | drop: | |
267 | /* Consume bad packet */ | |
268 | kfree_skb(skb); | |
269 | return 0; | |
270 | ||
271 | error: | |
272 | /* Let the UDP layer deal with the skb */ | |
273 | return 1; | |
274 | } | |
275 | ||
276 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
277 | __be16 port) | |
278 | { | |
279 | struct socket *sock; | |
280 | struct udp_port_cfg udp_conf; | |
281 | int err; | |
282 | ||
283 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
284 | ||
285 | if (ipv6) { | |
286 | udp_conf.family = AF_INET6; | |
287 | } else { | |
288 | udp_conf.family = AF_INET; | |
289 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
290 | } | |
291 | ||
292 | udp_conf.local_udp_port = port; | |
293 | ||
294 | /* Open UDP socket */ | |
295 | err = udp_sock_create(net, &udp_conf, &sock); | |
296 | if (err < 0) | |
297 | return ERR_PTR(err); | |
298 | ||
299 | return sock; | |
300 | } | |
301 | ||
302 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
303 | { | |
304 | struct sock *sk = gs->sock->sk; | |
305 | sa_family_t sa_family = sk->sk_family; | |
306 | int err; | |
307 | ||
308 | if (sa_family == AF_INET) { | |
309 | err = udp_add_offload(&gs->udp_offloads); | |
310 | if (err) | |
311 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
312 | err); | |
313 | } | |
314 | } | |
315 | ||
316 | static int geneve_hlen(struct genevehdr *gh) | |
317 | { | |
318 | return sizeof(*gh) + gh->opt_len * 4; | |
319 | } | |
320 | ||
321 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
322 | struct sk_buff *skb, | |
323 | struct udp_offload *uoff) | |
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 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
388 | struct udp_offload *uoff) | |
389 | { | |
390 | struct genevehdr *gh; | |
391 | struct packet_offload *ptype; | |
392 | __be16 type; | |
393 | int gh_len; | |
394 | int err = -ENOSYS; | |
395 | ||
396 | udp_tunnel_gro_complete(skb, nhoff); | |
397 | ||
398 | gh = (struct genevehdr *)(skb->data + nhoff); | |
399 | gh_len = geneve_hlen(gh); | |
400 | type = gh->proto_type; | |
401 | ||
402 | rcu_read_lock(); | |
403 | ptype = gro_find_complete_by_type(type); | |
404 | if (ptype) | |
405 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
406 | ||
407 | rcu_read_unlock(); | |
408 | return err; | |
409 | } | |
410 | ||
411 | /* Create new listen socket if needed */ | |
412 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
413 | bool ipv6) | |
414 | { | |
415 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
416 | struct geneve_sock *gs; | |
417 | struct socket *sock; | |
418 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 419 | int h; |
371bd106 PS |
420 | |
421 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
422 | if (!gs) | |
423 | return ERR_PTR(-ENOMEM); | |
424 | ||
425 | sock = geneve_create_sock(net, ipv6, port); | |
426 | if (IS_ERR(sock)) { | |
427 | kfree(gs); | |
428 | return ERR_CAST(sock); | |
429 | } | |
430 | ||
431 | gs->sock = sock; | |
432 | gs->refcnt = 1; | |
66d47003 PS |
433 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
434 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
435 | |
436 | /* Initialize the geneve udp offloads structure */ | |
437 | gs->udp_offloads.port = port; | |
438 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
439 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
440 | geneve_notify_add_rx_port(gs); | |
441 | ||
442 | /* Mark socket as an encapsulation socket */ | |
443 | tunnel_cfg.sk_user_data = gs; | |
444 | tunnel_cfg.encap_type = 1; | |
445 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
446 | tunnel_cfg.encap_destroy = NULL; | |
447 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
448 | list_add(&gs->list, &gn->sock_list); |
449 | return gs; | |
450 | } | |
451 | ||
452 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
453 | { | |
454 | struct sock *sk = gs->sock->sk; | |
455 | sa_family_t sa_family = sk->sk_family; | |
456 | ||
457 | if (sa_family == AF_INET) | |
458 | udp_del_offload(&gs->udp_offloads); | |
459 | } | |
460 | ||
461 | static void geneve_sock_release(struct geneve_sock *gs) | |
462 | { | |
463 | if (--gs->refcnt) | |
464 | return; | |
465 | ||
466 | list_del(&gs->list); | |
467 | geneve_notify_del_rx_port(gs); | |
468 | udp_tunnel_sock_release(gs->sock); | |
469 | kfree_rcu(gs, rcu); | |
470 | } | |
471 | ||
472 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, | |
473 | __be16 dst_port) | |
474 | { | |
475 | struct geneve_sock *gs; | |
476 | ||
477 | list_for_each_entry(gs, &gn->sock_list, list) { | |
478 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
479 | inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) { | |
480 | return gs; | |
481 | } | |
482 | } | |
483 | return NULL; | |
484 | } | |
485 | ||
2d07dc79 JL |
486 | static int geneve_open(struct net_device *dev) |
487 | { | |
488 | struct geneve_dev *geneve = netdev_priv(dev); | |
489 | struct net *net = geneve->net; | |
371bd106 | 490 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 491 | struct geneve_sock *gs; |
66d47003 | 492 | __u32 hash; |
2d07dc79 | 493 | |
371bd106 PS |
494 | gs = geneve_find_sock(gn, geneve->dst_port); |
495 | if (gs) { | |
496 | gs->refcnt++; | |
497 | goto out; | |
498 | } | |
499 | ||
500 | gs = geneve_socket_create(net, geneve->dst_port, false); | |
2d07dc79 JL |
501 | if (IS_ERR(gs)) |
502 | return PTR_ERR(gs); | |
503 | ||
371bd106 PS |
504 | out: |
505 | gs->collect_md = geneve->collect_md; | |
2d07dc79 | 506 | geneve->sock = gs; |
66d47003 PS |
507 | |
508 | hash = geneve_net_vni_hash(geneve->vni); | |
509 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
510 | return 0; |
511 | } | |
512 | ||
513 | static int geneve_stop(struct net_device *dev) | |
514 | { | |
515 | struct geneve_dev *geneve = netdev_priv(dev); | |
66d47003 | 516 | struct geneve_sock *gs = geneve->sock; |
2d07dc79 | 517 | |
66d47003 PS |
518 | if (!hlist_unhashed(&geneve->hlist)) |
519 | hlist_del_rcu(&geneve->hlist); | |
520 | geneve_sock_release(gs); | |
371bd106 PS |
521 | return 0; |
522 | } | |
523 | ||
524 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, | |
525 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
526 | bool csum) | |
527 | { | |
528 | struct genevehdr *gnvh; | |
529 | int min_headroom; | |
530 | int err; | |
2d07dc79 | 531 | |
371bd106 PS |
532 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
533 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
534 | err = skb_cow_head(skb, min_headroom); | |
535 | if (unlikely(err)) { | |
536 | kfree_skb(skb); | |
537 | goto free_rt; | |
538 | } | |
539 | ||
540 | skb = udp_tunnel_handle_offloads(skb, csum); | |
541 | if (IS_ERR(skb)) { | |
542 | err = PTR_ERR(skb); | |
543 | goto free_rt; | |
544 | } | |
545 | ||
546 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
547 | gnvh->ver = GENEVE_VER; | |
548 | gnvh->opt_len = opt_len / 4; | |
549 | gnvh->oam = !!(tun_flags & TUNNEL_OAM); | |
550 | gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
551 | gnvh->rsvd1 = 0; | |
552 | memcpy(gnvh->vni, vni, 3); | |
553 | gnvh->proto_type = htons(ETH_P_TEB); | |
554 | gnvh->rsvd2 = 0; | |
555 | memcpy(gnvh->options, opt, opt_len); | |
556 | ||
557 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 558 | return 0; |
371bd106 PS |
559 | |
560 | free_rt: | |
561 | ip_rt_put(rt); | |
562 | return err; | |
2d07dc79 JL |
563 | } |
564 | ||
e305ac6c PS |
565 | static struct rtable *geneve_get_rt(struct sk_buff *skb, |
566 | struct net_device *dev, | |
567 | struct flowi4 *fl4, | |
568 | struct ip_tunnel_info *info) | |
569 | { | |
570 | struct geneve_dev *geneve = netdev_priv(dev); | |
571 | struct rtable *rt = NULL; | |
572 | __u8 tos; | |
573 | ||
574 | memset(fl4, 0, sizeof(*fl4)); | |
575 | fl4->flowi4_mark = skb->mark; | |
576 | fl4->flowi4_proto = IPPROTO_UDP; | |
577 | ||
578 | if (info) { | |
579 | fl4->daddr = info->key.u.ipv4.dst; | |
580 | fl4->saddr = info->key.u.ipv4.src; | |
581 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
582 | } else { | |
583 | tos = geneve->tos; | |
584 | if (tos == 1) { | |
585 | const struct iphdr *iip = ip_hdr(skb); | |
586 | ||
587 | tos = ip_tunnel_get_dsfield(iip, skb); | |
588 | } | |
589 | ||
590 | fl4->flowi4_tos = RT_TOS(tos); | |
591 | fl4->daddr = geneve->remote.sin_addr.s_addr; | |
592 | } | |
593 | ||
594 | rt = ip_route_output_key(geneve->net, fl4); | |
595 | if (IS_ERR(rt)) { | |
596 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 597 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
598 | } |
599 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
600 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 601 | ip_rt_put(rt); |
fc4099f1 | 602 | return ERR_PTR(-ELOOP); |
e305ac6c | 603 | } |
e305ac6c PS |
604 | return rt; |
605 | } | |
606 | ||
607 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ | |
608 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
609 | { | |
610 | #ifdef __BIG_ENDIAN | |
611 | vni[0] = (__force __u8)(tun_id >> 16); | |
612 | vni[1] = (__force __u8)(tun_id >> 8); | |
613 | vni[2] = (__force __u8)tun_id; | |
614 | #else | |
615 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
616 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
617 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
618 | #endif | |
619 | } | |
620 | ||
2d07dc79 JL |
621 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
622 | { | |
623 | struct geneve_dev *geneve = netdev_priv(dev); | |
624 | struct geneve_sock *gs = geneve->sock; | |
e305ac6c | 625 | struct ip_tunnel_info *info = NULL; |
2d07dc79 | 626 | struct rtable *rt = NULL; |
08399efc | 627 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 628 | int err = -EINVAL; |
2d07dc79 | 629 | struct flowi4 fl4; |
8760ce58 | 630 | __u8 tos, ttl; |
e305ac6c | 631 | __be16 sport; |
371bd106 PS |
632 | bool udp_csum; |
633 | __be16 df; | |
2d07dc79 | 634 | |
e305ac6c PS |
635 | if (geneve->collect_md) { |
636 | info = skb_tunnel_info(skb); | |
46fa062a | 637 | if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
638 | netdev_dbg(dev, "no tunnel metadata\n"); |
639 | goto tx_error; | |
640 | } | |
7f9562a1 JB |
641 | if (info && ip_tunnel_info_af(info) != AF_INET) |
642 | goto tx_error; | |
e305ac6c | 643 | } |
980c394c | 644 | |
e305ac6c | 645 | rt = geneve_get_rt(skb, dev, &fl4, info); |
2d07dc79 JL |
646 | if (IS_ERR(rt)) { |
647 | netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); | |
fc4099f1 | 648 | err = PTR_ERR(rt); |
2d07dc79 JL |
649 | goto tx_error; |
650 | } | |
371bd106 PS |
651 | |
652 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 653 | skb_reset_mac_header(skb); |
e305ac6c | 654 | |
08399efc JL |
655 | iip = ip_hdr(skb); |
656 | ||
e305ac6c PS |
657 | if (info) { |
658 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
659 | u8 *opts = NULL; |
660 | u8 vni[3]; | |
e305ac6c PS |
661 | |
662 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c | 663 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
4c222798 | 664 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 665 | |
371bd106 PS |
666 | udp_csum = !!(key->tun_flags & TUNNEL_CSUM); |
667 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, | |
668 | info->options_len, opts, udp_csum); | |
669 | if (unlikely(err)) | |
670 | goto err; | |
671 | ||
08399efc | 672 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
673 | ttl = key->ttl; |
674 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 675 | } else { |
371bd106 PS |
676 | udp_csum = false; |
677 | err = geneve_build_skb(rt, skb, 0, geneve->vni, | |
678 | 0, NULL, udp_csum); | |
679 | if (unlikely(err)) | |
680 | goto err; | |
681 | ||
e305ac6c | 682 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
683 | ttl = geneve->ttl; |
684 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
685 | ttl = 1; | |
e305ac6c | 686 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 687 | df = 0; |
2d07dc79 | 688 | } |
371bd106 PS |
689 | err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr, |
690 | tos, ttl, df, sport, geneve->dst_port, | |
691 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
692 | !udp_csum); | |
2d07dc79 JL |
693 | |
694 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
2d07dc79 JL |
695 | return NETDEV_TX_OK; |
696 | ||
2d07dc79 | 697 | tx_error: |
2d07dc79 | 698 | dev_kfree_skb(skb); |
371bd106 | 699 | err: |
fc4099f1 PS |
700 | if (err == -ELOOP) |
701 | dev->stats.collisions++; | |
702 | else if (err == -ENETUNREACH) | |
703 | dev->stats.tx_carrier_errors++; | |
704 | else | |
705 | dev->stats.tx_errors++; | |
2d07dc79 JL |
706 | return NETDEV_TX_OK; |
707 | } | |
708 | ||
fc4099f1 PS |
709 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
710 | { | |
711 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
712 | struct geneve_dev *geneve = netdev_priv(dev); | |
713 | struct rtable *rt; | |
714 | struct flowi4 fl4; | |
715 | ||
716 | if (ip_tunnel_info_af(info) != AF_INET) | |
717 | return -EINVAL; | |
718 | ||
719 | rt = geneve_get_rt(skb, dev, &fl4, info); | |
720 | if (IS_ERR(rt)) | |
721 | return PTR_ERR(rt); | |
722 | ||
723 | ip_rt_put(rt); | |
724 | info->key.u.ipv4.src = fl4.saddr; | |
725 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, | |
726 | 1, USHRT_MAX, true); | |
727 | info->key.tp_dst = geneve->dst_port; | |
728 | return 0; | |
729 | } | |
730 | ||
2d07dc79 JL |
731 | static const struct net_device_ops geneve_netdev_ops = { |
732 | .ndo_init = geneve_init, | |
733 | .ndo_uninit = geneve_uninit, | |
734 | .ndo_open = geneve_open, | |
735 | .ndo_stop = geneve_stop, | |
736 | .ndo_start_xmit = geneve_xmit, | |
737 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
738 | .ndo_change_mtu = eth_change_mtu, | |
739 | .ndo_validate_addr = eth_validate_addr, | |
740 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 741 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
742 | }; |
743 | ||
744 | static void geneve_get_drvinfo(struct net_device *dev, | |
745 | struct ethtool_drvinfo *drvinfo) | |
746 | { | |
747 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
748 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
749 | } | |
750 | ||
751 | static const struct ethtool_ops geneve_ethtool_ops = { | |
752 | .get_drvinfo = geneve_get_drvinfo, | |
753 | .get_link = ethtool_op_get_link, | |
754 | }; | |
755 | ||
756 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
757 | static struct device_type geneve_type = { | |
758 | .name = "geneve", | |
759 | }; | |
760 | ||
761 | /* Initialize the device structure. */ | |
762 | static void geneve_setup(struct net_device *dev) | |
763 | { | |
764 | ether_setup(dev); | |
765 | ||
766 | dev->netdev_ops = &geneve_netdev_ops; | |
767 | dev->ethtool_ops = &geneve_ethtool_ops; | |
768 | dev->destructor = free_netdev; | |
769 | ||
770 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
771 | ||
2d07dc79 JL |
772 | dev->features |= NETIF_F_LLTX; |
773 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
774 | dev->features |= NETIF_F_RXCSUM; | |
775 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
776 | ||
2d07dc79 JL |
777 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
778 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
779 | |
780 | netif_keep_dst(dev); | |
ed961ac2 | 781 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 782 | eth_hw_addr_random(dev); |
2d07dc79 JL |
783 | } |
784 | ||
785 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
786 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
787 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8760ce58 | 788 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 789 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 790 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 791 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
2d07dc79 JL |
792 | }; |
793 | ||
794 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
795 | { | |
796 | if (tb[IFLA_ADDRESS]) { | |
797 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
798 | return -EINVAL; | |
799 | ||
800 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
801 | return -EADDRNOTAVAIL; | |
802 | } | |
803 | ||
804 | if (!data) | |
805 | return -EINVAL; | |
806 | ||
807 | if (data[IFLA_GENEVE_ID]) { | |
808 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
809 | ||
810 | if (vni >= GENEVE_VID_MASK) | |
811 | return -ERANGE; | |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
371bd106 PS |
817 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
818 | __be16 dst_port, | |
819 | __be32 rem_addr, | |
820 | u8 vni[], | |
821 | bool *tun_on_same_port, | |
822 | bool *tun_collect_md) | |
823 | { | |
824 | struct geneve_dev *geneve, *t; | |
825 | ||
826 | *tun_on_same_port = false; | |
827 | *tun_collect_md = false; | |
828 | t = NULL; | |
829 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
830 | if (geneve->dst_port == dst_port) { | |
831 | *tun_collect_md = geneve->collect_md; | |
832 | *tun_on_same_port = true; | |
833 | } | |
834 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
835 | rem_addr == geneve->remote.sin_addr.s_addr && | |
836 | dst_port == geneve->dst_port) | |
837 | t = geneve; | |
838 | } | |
839 | return t; | |
840 | } | |
841 | ||
e305ac6c PS |
842 | static int geneve_configure(struct net *net, struct net_device *dev, |
843 | __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos, | |
7bbe33ff | 844 | __be16 dst_port, bool metadata) |
2d07dc79 JL |
845 | { |
846 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
847 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
848 | bool tun_collect_md, tun_on_same_port; | |
2d07dc79 JL |
849 | int err; |
850 | ||
e305ac6c | 851 | if (metadata) { |
371bd106 PS |
852 | if (rem_addr || vni || tos || ttl) |
853 | return -EINVAL; | |
e305ac6c | 854 | } |
2d07dc79 JL |
855 | |
856 | geneve->net = net; | |
857 | geneve->dev = dev; | |
858 | ||
2d07dc79 JL |
859 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
860 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
861 | geneve->vni[2] = vni & 0x000000ff; | |
862 | ||
e305ac6c | 863 | geneve->remote.sin_addr.s_addr = rem_addr; |
2d07dc79 JL |
864 | if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr))) |
865 | return -EINVAL; | |
866 | ||
e305ac6c PS |
867 | geneve->ttl = ttl; |
868 | geneve->tos = tos; | |
7bbe33ff | 869 | geneve->dst_port = dst_port; |
e305ac6c PS |
870 | geneve->collect_md = metadata; |
871 | ||
7bbe33ff | 872 | t = geneve_find_dev(gn, dst_port, rem_addr, geneve->vni, |
371bd106 PS |
873 | &tun_on_same_port, &tun_collect_md); |
874 | if (t) | |
875 | return -EBUSY; | |
876 | ||
877 | if (metadata) { | |
878 | if (tun_on_same_port) | |
879 | return -EPERM; | |
880 | } else { | |
881 | if (tun_collect_md) | |
882 | return -EPERM; | |
883 | } | |
884 | ||
2d07dc79 JL |
885 | err = register_netdevice(dev); |
886 | if (err) | |
887 | return err; | |
888 | ||
e305ac6c | 889 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
890 | return 0; |
891 | } | |
892 | ||
893 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
894 | struct nlattr *tb[], struct nlattr *data[]) | |
895 | { | |
7bbe33ff | 896 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
897 | __u8 ttl = 0, tos = 0; |
898 | bool metadata = false; | |
e277de5f JG |
899 | __be32 rem_addr = 0; |
900 | __u32 vni = 0; | |
e305ac6c | 901 | |
e277de5f JG |
902 | if (data[IFLA_GENEVE_ID]) |
903 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 904 | |
e277de5f JG |
905 | if (data[IFLA_GENEVE_REMOTE]) |
906 | rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
e305ac6c | 907 | |
8760ce58 | 908 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 909 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 910 | |
d8951125 | 911 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 912 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 913 | |
e305ac6c | 914 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 915 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 916 | |
e305ac6c PS |
917 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
918 | metadata = true; | |
2d07dc79 | 919 | |
e305ac6c PS |
920 | return geneve_configure(net, dev, rem_addr, vni, |
921 | ttl, tos, dst_port, metadata); | |
2d07dc79 JL |
922 | } |
923 | ||
924 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
925 | { | |
926 | struct geneve_dev *geneve = netdev_priv(dev); | |
927 | ||
2d07dc79 JL |
928 | list_del(&geneve->next); |
929 | unregister_netdevice_queue(dev, head); | |
930 | } | |
931 | ||
932 | static size_t geneve_get_size(const struct net_device *dev) | |
933 | { | |
934 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
935 | nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */ | |
8760ce58 | 936 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 937 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
7bbe33ff | 938 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 939 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
2d07dc79 JL |
940 | 0; |
941 | } | |
942 | ||
943 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
944 | { | |
945 | struct geneve_dev *geneve = netdev_priv(dev); | |
946 | __u32 vni; | |
947 | ||
948 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
949 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
950 | goto nla_put_failure; | |
951 | ||
952 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
953 | geneve->remote.sin_addr.s_addr)) | |
954 | goto nla_put_failure; | |
955 | ||
d8951125 JL |
956 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
957 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
958 | goto nla_put_failure; |
959 | ||
7bbe33ff | 960 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
961 | goto nla_put_failure; |
962 | ||
e305ac6c PS |
963 | if (geneve->collect_md) { |
964 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
965 | goto nla_put_failure; | |
966 | } | |
967 | ||
2d07dc79 JL |
968 | return 0; |
969 | ||
970 | nla_put_failure: | |
971 | return -EMSGSIZE; | |
972 | } | |
973 | ||
974 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
975 | .kind = "geneve", | |
976 | .maxtype = IFLA_GENEVE_MAX, | |
977 | .policy = geneve_policy, | |
978 | .priv_size = sizeof(struct geneve_dev), | |
979 | .setup = geneve_setup, | |
980 | .validate = geneve_validate, | |
981 | .newlink = geneve_newlink, | |
982 | .dellink = geneve_dellink, | |
983 | .get_size = geneve_get_size, | |
984 | .fill_info = geneve_fill_info, | |
985 | }; | |
986 | ||
e305ac6c PS |
987 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
988 | u8 name_assign_type, u16 dst_port) | |
989 | { | |
990 | struct nlattr *tb[IFLA_MAX + 1]; | |
991 | struct net_device *dev; | |
992 | int err; | |
993 | ||
994 | memset(tb, 0, sizeof(tb)); | |
995 | dev = rtnl_create_link(net, name, name_assign_type, | |
996 | &geneve_link_ops, tb); | |
997 | if (IS_ERR(dev)) | |
998 | return dev; | |
999 | ||
7bbe33ff | 1000 | err = geneve_configure(net, dev, 0, 0, 0, 0, htons(dst_port), true); |
e305ac6c PS |
1001 | if (err) { |
1002 | free_netdev(dev); | |
1003 | return ERR_PTR(err); | |
1004 | } | |
1005 | return dev; | |
1006 | } | |
1007 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1008 | ||
2d07dc79 JL |
1009 | static __net_init int geneve_init_net(struct net *net) |
1010 | { | |
1011 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1012 | |
1013 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1014 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1015 | return 0; |
1016 | } | |
1017 | ||
1018 | static void __net_exit geneve_exit_net(struct net *net) | |
1019 | { | |
1020 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1021 | struct geneve_dev *geneve, *next; | |
1022 | struct net_device *dev, *aux; | |
1023 | LIST_HEAD(list); | |
1024 | ||
1025 | rtnl_lock(); | |
1026 | ||
1027 | /* gather any geneve devices that were moved into this ns */ | |
1028 | for_each_netdev_safe(net, dev, aux) | |
1029 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1030 | unregister_netdevice_queue(dev, &list); | |
1031 | ||
1032 | /* now gather any other geneve devices that were created in this ns */ | |
1033 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1034 | /* If geneve->dev is in the same netns, it was already added | |
1035 | * to the list by the previous loop. | |
1036 | */ | |
1037 | if (!net_eq(dev_net(geneve->dev), net)) | |
1038 | unregister_netdevice_queue(geneve->dev, &list); | |
1039 | } | |
1040 | ||
1041 | /* unregister the devices gathered above */ | |
1042 | unregister_netdevice_many(&list); | |
1043 | rtnl_unlock(); | |
1044 | } | |
1045 | ||
1046 | static struct pernet_operations geneve_net_ops = { | |
1047 | .init = geneve_init_net, | |
1048 | .exit = geneve_exit_net, | |
1049 | .id = &geneve_net_id, | |
1050 | .size = sizeof(struct geneve_net), | |
1051 | }; | |
1052 | ||
1053 | static int __init geneve_init_module(void) | |
1054 | { | |
1055 | int rc; | |
1056 | ||
1057 | rc = register_pernet_subsys(&geneve_net_ops); | |
1058 | if (rc) | |
1059 | goto out1; | |
1060 | ||
1061 | rc = rtnl_link_register(&geneve_link_ops); | |
1062 | if (rc) | |
1063 | goto out2; | |
1064 | ||
1065 | return 0; | |
1066 | out2: | |
1067 | unregister_pernet_subsys(&geneve_net_ops); | |
1068 | out1: | |
1069 | return rc; | |
1070 | } | |
1071 | late_initcall(geneve_init_module); | |
1072 | ||
1073 | static void __exit geneve_cleanup_module(void) | |
1074 | { | |
1075 | rtnl_link_unregister(&geneve_link_ops); | |
1076 | unregister_pernet_subsys(&geneve_net_ops); | |
1077 | } | |
1078 | module_exit(geneve_cleanup_module); | |
1079 | ||
1080 | MODULE_LICENSE("GPL"); | |
1081 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1082 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1083 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1084 | MODULE_ALIAS_RTNL_LINK("geneve"); |