Commit | Line | Data |
---|---|---|
2d07dc79 JL |
1 | /* |
2 | * GENEVE: Generic Network Virtualization Encapsulation | |
3 | * | |
4 | * Copyright (c) 2015 Red Hat, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/hash.h> | |
e305ac6c | 18 | #include <net/dst_metadata.h> |
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 | ||
8ed66f0e JL |
49 | union geneve_addr { |
50 | struct sockaddr_in sin; | |
51 | struct sockaddr_in6 sin6; | |
52 | struct sockaddr sa; | |
53 | }; | |
54 | ||
55 | static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, }; | |
56 | ||
2d07dc79 JL |
57 | /* Pseudo network device */ |
58 | struct geneve_dev { | |
59 | struct hlist_node hlist; /* vni hash table */ | |
60 | struct net *net; /* netns for packet i/o */ | |
61 | struct net_device *dev; /* netdev for geneve tunnel */ | |
8ed66f0e JL |
62 | struct geneve_sock *sock4; /* IPv4 socket used for geneve tunnel */ |
63 | #if IS_ENABLED(CONFIG_IPV6) | |
64 | struct geneve_sock *sock6; /* IPv6 socket used for geneve tunnel */ | |
65 | #endif | |
8760ce58 JL |
66 | u8 vni[3]; /* virtual network ID for tunnel */ |
67 | u8 ttl; /* TTL override */ | |
d8951125 | 68 | u8 tos; /* TOS override */ |
8ed66f0e | 69 | union geneve_addr remote; /* IP address for link partner */ |
2d07dc79 | 70 | struct list_head next; /* geneve's per namespace list */ |
cd7918b3 | 71 | __be16 dst_port; |
e305ac6c | 72 | bool collect_md; |
8e816df8 | 73 | struct gro_cells gro_cells; |
abe492b4 | 74 | u32 flags; |
2d07dc79 JL |
75 | }; |
76 | ||
abe492b4 TH |
77 | /* Geneve device flags */ |
78 | #define GENEVE_F_UDP_CSUM BIT(0) | |
79 | #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1) | |
80 | #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2) | |
81 | ||
371bd106 PS |
82 | struct geneve_sock { |
83 | bool collect_md; | |
371bd106 PS |
84 | struct list_head list; |
85 | struct socket *sock; | |
86 | struct rcu_head rcu; | |
87 | int refcnt; | |
88 | struct udp_offload udp_offloads; | |
66d47003 | 89 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
abe492b4 | 90 | u32 flags; |
371bd106 | 91 | }; |
2d07dc79 JL |
92 | |
93 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
94 | { | |
95 | __u32 vnid; | |
96 | ||
97 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
98 | return hash_32(vnid, VNI_HASH_BITS); | |
99 | } | |
100 | ||
e305ac6c PS |
101 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
102 | { | |
103 | #ifdef __BIG_ENDIAN | |
104 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
105 | #else | |
106 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
107 | ((__force u64)vni[1] << 48) | | |
108 | ((__force u64)vni[2] << 56)); | |
109 | #endif | |
110 | } | |
111 | ||
66d47003 | 112 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 113 | __be32 addr, u8 vni[]) |
2d07dc79 | 114 | { |
2d07dc79 | 115 | struct hlist_head *vni_list_head; |
e305ac6c | 116 | struct geneve_dev *geneve; |
2d07dc79 JL |
117 | __u32 hash; |
118 | ||
2d07dc79 | 119 | /* Find the device for this VNI */ |
371bd106 | 120 | hash = geneve_net_vni_hash(vni); |
66d47003 | 121 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 122 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 123 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
8ed66f0e JL |
124 | addr == geneve->remote.sin.sin_addr.s_addr) |
125 | return geneve; | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | #if IS_ENABLED(CONFIG_IPV6) | |
131 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
132 | struct in6_addr addr6, u8 vni[]) | |
133 | { | |
134 | struct hlist_head *vni_list_head; | |
135 | struct geneve_dev *geneve; | |
136 | __u32 hash; | |
137 | ||
138 | /* Find the device for this VNI */ | |
139 | hash = geneve_net_vni_hash(vni); | |
140 | vni_list_head = &gs->vni_list[hash]; | |
141 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
142 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
143 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e305ac6c | 144 | return geneve; |
2d07dc79 | 145 | } |
e305ac6c PS |
146 | return NULL; |
147 | } | |
8ed66f0e | 148 | #endif |
e305ac6c | 149 | |
371bd106 PS |
150 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
151 | { | |
152 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
153 | } | |
154 | ||
e305ac6c PS |
155 | /* geneve receive/decap routine */ |
156 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
157 | { | |
158 | struct genevehdr *gnvh = geneve_hdr(skb); | |
159 | struct metadata_dst *tun_dst = NULL; | |
160 | struct geneve_dev *geneve = NULL; | |
161 | struct pcpu_sw_netstats *stats; | |
8ed66f0e | 162 | struct iphdr *iph = NULL; |
371bd106 | 163 | __be32 addr; |
8ed66f0e JL |
164 | static u8 zero_vni[3]; |
165 | u8 *vni; | |
166 | int err = 0; | |
167 | sa_family_t sa_family; | |
168 | #if IS_ENABLED(CONFIG_IPV6) | |
169 | struct ipv6hdr *ip6h = NULL; | |
170 | struct in6_addr addr6; | |
171 | static struct in6_addr zero_addr6; | |
172 | #endif | |
e305ac6c | 173 | |
8ed66f0e | 174 | sa_family = gs->sock->sk->sk_family; |
08399efc | 175 | |
8ed66f0e JL |
176 | if (sa_family == AF_INET) { |
177 | iph = ip_hdr(skb); /* outer IP header... */ | |
371bd106 | 178 | |
8ed66f0e JL |
179 | if (gs->collect_md) { |
180 | vni = zero_vni; | |
181 | addr = 0; | |
182 | } else { | |
183 | vni = gnvh->vni; | |
184 | ||
185 | addr = iph->saddr; | |
186 | } | |
187 | ||
188 | geneve = geneve_lookup(gs, addr, vni); | |
189 | #if IS_ENABLED(CONFIG_IPV6) | |
190 | } else if (sa_family == AF_INET6) { | |
191 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ | |
371bd106 | 192 | |
8ed66f0e JL |
193 | if (gs->collect_md) { |
194 | vni = zero_vni; | |
195 | addr6 = zero_addr6; | |
196 | } else { | |
197 | vni = gnvh->vni; | |
198 | ||
199 | addr6 = ip6h->saddr; | |
200 | } | |
201 | ||
202 | geneve = geneve6_lookup(gs, addr6, vni); | |
203 | #endif | |
204 | } | |
2d07dc79 JL |
205 | if (!geneve) |
206 | goto drop; | |
207 | ||
371bd106 | 208 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 209 | __be16 flags; |
e305ac6c PS |
210 | |
211 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
212 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
213 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
214 | ||
8ed66f0e | 215 | tun_dst = udp_tun_rx_dst(skb, sa_family, flags, |
e305ac6c PS |
216 | vni_to_tunnel_id(gnvh->vni), |
217 | gnvh->opt_len * 4); | |
218 | if (!tun_dst) | |
219 | goto drop; | |
e305ac6c | 220 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
221 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
222 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
223 | } else { |
224 | /* Drop packets w/ critical options, | |
225 | * since we don't support any... | |
226 | */ | |
227 | if (gnvh->critical) | |
228 | goto drop; | |
229 | } | |
2d07dc79 JL |
230 | |
231 | skb_reset_mac_header(skb); | |
232 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
233 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
234 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
235 | ||
e305ac6c PS |
236 | if (tun_dst) |
237 | skb_dst_set(skb, &tun_dst->dst); | |
238 | ||
2d07dc79 JL |
239 | /* Ignore packet loops (and multicast echo) */ |
240 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
241 | goto drop; | |
242 | ||
243 | skb_reset_network_header(skb); | |
244 | ||
8ed66f0e JL |
245 | if (iph) |
246 | err = IP_ECN_decapsulate(iph, skb); | |
247 | #if IS_ENABLED(CONFIG_IPV6) | |
248 | if (ip6h) | |
249 | err = IP6_ECN_decapsulate(ip6h, skb); | |
250 | #endif | |
2d07dc79 JL |
251 | |
252 | if (unlikely(err)) { | |
8ed66f0e JL |
253 | if (log_ecn_error) { |
254 | if (iph) | |
255 | net_info_ratelimited("non-ECT from %pI4 " | |
256 | "with TOS=%#x\n", | |
257 | &iph->saddr, iph->tos); | |
258 | #if IS_ENABLED(CONFIG_IPV6) | |
259 | if (ip6h) | |
260 | net_info_ratelimited("non-ECT from %pI6\n", | |
261 | &ip6h->saddr); | |
262 | #endif | |
263 | } | |
2d07dc79 JL |
264 | if (err > 1) { |
265 | ++geneve->dev->stats.rx_frame_errors; | |
266 | ++geneve->dev->stats.rx_errors; | |
267 | goto drop; | |
268 | } | |
269 | } | |
270 | ||
271 | stats = this_cpu_ptr(geneve->dev->tstats); | |
272 | u64_stats_update_begin(&stats->syncp); | |
273 | stats->rx_packets++; | |
274 | stats->rx_bytes += skb->len; | |
275 | u64_stats_update_end(&stats->syncp); | |
276 | ||
8e816df8 | 277 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
278 | return; |
279 | drop: | |
280 | /* Consume bad packet */ | |
281 | kfree_skb(skb); | |
282 | } | |
283 | ||
284 | /* Setup stats when device is created */ | |
285 | static int geneve_init(struct net_device *dev) | |
286 | { | |
8e816df8 JG |
287 | struct geneve_dev *geneve = netdev_priv(dev); |
288 | int err; | |
289 | ||
2d07dc79 JL |
290 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
291 | if (!dev->tstats) | |
292 | return -ENOMEM; | |
8e816df8 JG |
293 | |
294 | err = gro_cells_init(&geneve->gro_cells, dev); | |
295 | if (err) { | |
296 | free_percpu(dev->tstats); | |
297 | return err; | |
298 | } | |
299 | ||
2d07dc79 JL |
300 | return 0; |
301 | } | |
302 | ||
303 | static void geneve_uninit(struct net_device *dev) | |
304 | { | |
8e816df8 JG |
305 | struct geneve_dev *geneve = netdev_priv(dev); |
306 | ||
307 | gro_cells_destroy(&geneve->gro_cells); | |
2d07dc79 JL |
308 | free_percpu(dev->tstats); |
309 | } | |
310 | ||
371bd106 PS |
311 | /* Callback from net/ipv4/udp.c to receive packets */ |
312 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
313 | { | |
314 | struct genevehdr *geneveh; | |
315 | struct geneve_sock *gs; | |
316 | int opts_len; | |
317 | ||
318 | /* Need Geneve and inner Ethernet header to be present */ | |
319 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
320 | goto error; | |
321 | ||
322 | /* Return packets with reserved bits set */ | |
323 | geneveh = geneve_hdr(skb); | |
324 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
325 | goto error; | |
326 | ||
327 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
328 | goto error; | |
329 | ||
330 | opts_len = geneveh->opt_len * 4; | |
331 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
332 | htons(ETH_P_TEB))) | |
333 | goto drop; | |
334 | ||
335 | gs = rcu_dereference_sk_user_data(sk); | |
336 | if (!gs) | |
337 | goto drop; | |
338 | ||
339 | geneve_rx(gs, skb); | |
340 | return 0; | |
341 | ||
342 | drop: | |
343 | /* Consume bad packet */ | |
344 | kfree_skb(skb); | |
345 | return 0; | |
346 | ||
347 | error: | |
348 | /* Let the UDP layer deal with the skb */ | |
349 | return 1; | |
350 | } | |
351 | ||
352 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
abe492b4 | 353 | __be16 port, u32 flags) |
371bd106 PS |
354 | { |
355 | struct socket *sock; | |
356 | struct udp_port_cfg udp_conf; | |
357 | int err; | |
358 | ||
359 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
360 | ||
361 | if (ipv6) { | |
362 | udp_conf.family = AF_INET6; | |
8ed66f0e | 363 | udp_conf.ipv6_v6only = 1; |
abe492b4 TH |
364 | udp_conf.use_udp6_rx_checksums = |
365 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
371bd106 PS |
366 | } else { |
367 | udp_conf.family = AF_INET; | |
368 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
369 | } | |
370 | ||
371 | udp_conf.local_udp_port = port; | |
372 | ||
373 | /* Open UDP socket */ | |
374 | err = udp_sock_create(net, &udp_conf, &sock); | |
375 | if (err < 0) | |
376 | return ERR_PTR(err); | |
377 | ||
378 | return sock; | |
379 | } | |
380 | ||
381 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
382 | { | |
a8170d2b | 383 | struct net_device *dev; |
371bd106 | 384 | struct sock *sk = gs->sock->sk; |
a8170d2b | 385 | struct net *net = sock_net(sk); |
371bd106 | 386 | sa_family_t sa_family = sk->sk_family; |
a8170d2b | 387 | __be16 port = inet_sk(sk)->inet_sport; |
371bd106 PS |
388 | int err; |
389 | ||
390 | if (sa_family == AF_INET) { | |
787d7ac3 | 391 | err = udp_add_offload(sock_net(sk), &gs->udp_offloads); |
371bd106 PS |
392 | if (err) |
393 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
394 | err); | |
395 | } | |
a8170d2b SA |
396 | |
397 | rcu_read_lock(); | |
398 | for_each_netdev_rcu(net, dev) { | |
399 | if (dev->netdev_ops->ndo_add_geneve_port) | |
400 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, | |
401 | port); | |
402 | } | |
403 | rcu_read_unlock(); | |
371bd106 PS |
404 | } |
405 | ||
406 | static int geneve_hlen(struct genevehdr *gh) | |
407 | { | |
408 | return sizeof(*gh) + gh->opt_len * 4; | |
409 | } | |
410 | ||
411 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
412 | struct sk_buff *skb, | |
413 | struct udp_offload *uoff) | |
414 | { | |
415 | struct sk_buff *p, **pp = NULL; | |
416 | struct genevehdr *gh, *gh2; | |
417 | unsigned int hlen, gh_len, off_gnv; | |
418 | const struct packet_offload *ptype; | |
419 | __be16 type; | |
420 | int flush = 1; | |
421 | ||
422 | off_gnv = skb_gro_offset(skb); | |
423 | hlen = off_gnv + sizeof(*gh); | |
424 | gh = skb_gro_header_fast(skb, off_gnv); | |
425 | if (skb_gro_header_hard(skb, hlen)) { | |
426 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
427 | if (unlikely(!gh)) | |
428 | goto out; | |
429 | } | |
430 | ||
431 | if (gh->ver != GENEVE_VER || gh->oam) | |
432 | goto out; | |
433 | gh_len = geneve_hlen(gh); | |
434 | ||
435 | hlen = off_gnv + gh_len; | |
436 | if (skb_gro_header_hard(skb, hlen)) { | |
437 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
438 | if (unlikely(!gh)) | |
439 | goto out; | |
440 | } | |
441 | ||
442 | flush = 0; | |
443 | ||
444 | for (p = *head; p; p = p->next) { | |
445 | if (!NAPI_GRO_CB(p)->same_flow) | |
446 | continue; | |
447 | ||
448 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
449 | if (gh->opt_len != gh2->opt_len || | |
450 | memcmp(gh, gh2, gh_len)) { | |
451 | NAPI_GRO_CB(p)->same_flow = 0; | |
452 | continue; | |
453 | } | |
454 | } | |
455 | ||
456 | type = gh->proto_type; | |
457 | ||
458 | rcu_read_lock(); | |
459 | ptype = gro_find_receive_by_type(type); | |
460 | if (!ptype) { | |
461 | flush = 1; | |
462 | goto out_unlock; | |
463 | } | |
464 | ||
465 | skb_gro_pull(skb, gh_len); | |
466 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
467 | pp = ptype->callbacks.gro_receive(head, skb); | |
468 | ||
469 | out_unlock: | |
470 | rcu_read_unlock(); | |
471 | out: | |
472 | NAPI_GRO_CB(skb)->flush |= flush; | |
473 | ||
474 | return pp; | |
475 | } | |
476 | ||
477 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
478 | struct udp_offload *uoff) | |
479 | { | |
480 | struct genevehdr *gh; | |
481 | struct packet_offload *ptype; | |
482 | __be16 type; | |
483 | int gh_len; | |
484 | int err = -ENOSYS; | |
485 | ||
486 | udp_tunnel_gro_complete(skb, nhoff); | |
487 | ||
488 | gh = (struct genevehdr *)(skb->data + nhoff); | |
489 | gh_len = geneve_hlen(gh); | |
490 | type = gh->proto_type; | |
491 | ||
492 | rcu_read_lock(); | |
493 | ptype = gro_find_complete_by_type(type); | |
494 | if (ptype) | |
495 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
496 | ||
497 | rcu_read_unlock(); | |
498 | return err; | |
499 | } | |
500 | ||
501 | /* Create new listen socket if needed */ | |
502 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
abe492b4 | 503 | bool ipv6, u32 flags) |
371bd106 PS |
504 | { |
505 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
506 | struct geneve_sock *gs; | |
507 | struct socket *sock; | |
508 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 509 | int h; |
371bd106 PS |
510 | |
511 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
512 | if (!gs) | |
513 | return ERR_PTR(-ENOMEM); | |
514 | ||
abe492b4 | 515 | sock = geneve_create_sock(net, ipv6, port, flags); |
371bd106 PS |
516 | if (IS_ERR(sock)) { |
517 | kfree(gs); | |
518 | return ERR_CAST(sock); | |
519 | } | |
520 | ||
521 | gs->sock = sock; | |
522 | gs->refcnt = 1; | |
66d47003 PS |
523 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
524 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
525 | |
526 | /* Initialize the geneve udp offloads structure */ | |
527 | gs->udp_offloads.port = port; | |
528 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
529 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
530 | geneve_notify_add_rx_port(gs); | |
531 | ||
532 | /* Mark socket as an encapsulation socket */ | |
533 | tunnel_cfg.sk_user_data = gs; | |
534 | tunnel_cfg.encap_type = 1; | |
535 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
536 | tunnel_cfg.encap_destroy = NULL; | |
537 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
538 | list_add(&gs->list, &gn->sock_list); |
539 | return gs; | |
540 | } | |
541 | ||
542 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
543 | { | |
a8170d2b | 544 | struct net_device *dev; |
371bd106 | 545 | struct sock *sk = gs->sock->sk; |
a8170d2b | 546 | struct net *net = sock_net(sk); |
371bd106 | 547 | sa_family_t sa_family = sk->sk_family; |
a8170d2b SA |
548 | __be16 port = inet_sk(sk)->inet_sport; |
549 | ||
550 | rcu_read_lock(); | |
551 | for_each_netdev_rcu(net, dev) { | |
552 | if (dev->netdev_ops->ndo_del_geneve_port) | |
553 | dev->netdev_ops->ndo_del_geneve_port(dev, sa_family, | |
554 | port); | |
555 | } | |
556 | ||
557 | rcu_read_unlock(); | |
371bd106 PS |
558 | |
559 | if (sa_family == AF_INET) | |
560 | udp_del_offload(&gs->udp_offloads); | |
561 | } | |
562 | ||
8ed66f0e | 563 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 564 | { |
8ed66f0e | 565 | if (!gs || --gs->refcnt) |
371bd106 PS |
566 | return; |
567 | ||
568 | list_del(&gs->list); | |
569 | geneve_notify_del_rx_port(gs); | |
570 | udp_tunnel_sock_release(gs->sock); | |
571 | kfree_rcu(gs, rcu); | |
572 | } | |
573 | ||
8ed66f0e JL |
574 | static void geneve_sock_release(struct geneve_dev *geneve) |
575 | { | |
576 | __geneve_sock_release(geneve->sock4); | |
577 | #if IS_ENABLED(CONFIG_IPV6) | |
578 | __geneve_sock_release(geneve->sock6); | |
579 | #endif | |
580 | } | |
581 | ||
371bd106 | 582 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 583 | sa_family_t family, |
371bd106 PS |
584 | __be16 dst_port) |
585 | { | |
586 | struct geneve_sock *gs; | |
587 | ||
588 | list_for_each_entry(gs, &gn->sock_list, list) { | |
589 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
8ed66f0e | 590 | inet_sk(gs->sock->sk)->sk.sk_family == family) { |
371bd106 PS |
591 | return gs; |
592 | } | |
593 | } | |
594 | return NULL; | |
595 | } | |
596 | ||
8ed66f0e | 597 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 598 | { |
2d07dc79 | 599 | struct net *net = geneve->net; |
371bd106 | 600 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 601 | struct geneve_sock *gs; |
66d47003 | 602 | __u32 hash; |
2d07dc79 | 603 | |
8ed66f0e | 604 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
605 | if (gs) { |
606 | gs->refcnt++; | |
607 | goto out; | |
608 | } | |
609 | ||
abe492b4 | 610 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
611 | if (IS_ERR(gs)) |
612 | return PTR_ERR(gs); | |
613 | ||
371bd106 PS |
614 | out: |
615 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 616 | gs->flags = geneve->flags; |
8ed66f0e JL |
617 | #if IS_ENABLED(CONFIG_IPV6) |
618 | if (ipv6) | |
619 | geneve->sock6 = gs; | |
620 | else | |
621 | #endif | |
622 | geneve->sock4 = gs; | |
66d47003 PS |
623 | |
624 | hash = geneve_net_vni_hash(geneve->vni); | |
625 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
626 | return 0; |
627 | } | |
628 | ||
8ed66f0e JL |
629 | static int geneve_open(struct net_device *dev) |
630 | { | |
631 | struct geneve_dev *geneve = netdev_priv(dev); | |
632 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
633 | bool metadata = geneve->collect_md; | |
634 | int ret = 0; | |
635 | ||
636 | geneve->sock4 = NULL; | |
637 | #if IS_ENABLED(CONFIG_IPV6) | |
638 | geneve->sock6 = NULL; | |
639 | if (ipv6 || metadata) | |
640 | ret = geneve_sock_add(geneve, true); | |
641 | #endif | |
642 | if (!ret && (!ipv6 || metadata)) | |
643 | ret = geneve_sock_add(geneve, false); | |
644 | if (ret < 0) | |
645 | geneve_sock_release(geneve); | |
646 | ||
647 | return ret; | |
648 | } | |
649 | ||
2d07dc79 JL |
650 | static int geneve_stop(struct net_device *dev) |
651 | { | |
652 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 653 | |
66d47003 PS |
654 | if (!hlist_unhashed(&geneve->hlist)) |
655 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 656 | geneve_sock_release(geneve); |
371bd106 PS |
657 | return 0; |
658 | } | |
659 | ||
8ed66f0e JL |
660 | static void geneve_build_header(struct genevehdr *geneveh, |
661 | __be16 tun_flags, u8 vni[3], | |
662 | u8 options_len, u8 *options) | |
663 | { | |
664 | geneveh->ver = GENEVE_VER; | |
665 | geneveh->opt_len = options_len / 4; | |
666 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
667 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
668 | geneveh->rsvd1 = 0; | |
669 | memcpy(geneveh->vni, vni, 3); | |
670 | geneveh->proto_type = htons(ETH_P_TEB); | |
671 | geneveh->rsvd2 = 0; | |
672 | ||
673 | memcpy(geneveh->options, options, options_len); | |
674 | } | |
675 | ||
371bd106 PS |
676 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
677 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 678 | u32 flags, bool xnet) |
371bd106 PS |
679 | { |
680 | struct genevehdr *gnvh; | |
681 | int min_headroom; | |
682 | int err; | |
abe492b4 | 683 | bool udp_sum = !!(flags & GENEVE_F_UDP_CSUM); |
2d07dc79 | 684 | |
8ed66f0e JL |
685 | skb_scrub_packet(skb, xnet); |
686 | ||
371bd106 PS |
687 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
688 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
689 | err = skb_cow_head(skb, min_headroom); | |
690 | if (unlikely(err)) { | |
691 | kfree_skb(skb); | |
692 | goto free_rt; | |
693 | } | |
694 | ||
abe492b4 | 695 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
371bd106 PS |
696 | if (IS_ERR(skb)) { |
697 | err = PTR_ERR(skb); | |
698 | goto free_rt; | |
699 | } | |
700 | ||
701 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 702 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
703 | |
704 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 705 | return 0; |
371bd106 PS |
706 | |
707 | free_rt: | |
708 | ip_rt_put(rt); | |
709 | return err; | |
2d07dc79 JL |
710 | } |
711 | ||
8ed66f0e JL |
712 | #if IS_ENABLED(CONFIG_IPV6) |
713 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
714 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 715 | u32 flags, bool xnet) |
8ed66f0e JL |
716 | { |
717 | struct genevehdr *gnvh; | |
718 | int min_headroom; | |
719 | int err; | |
abe492b4 | 720 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
721 | |
722 | skb_scrub_packet(skb, xnet); | |
723 | ||
724 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
725 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
726 | err = skb_cow_head(skb, min_headroom); | |
727 | if (unlikely(err)) { | |
728 | kfree_skb(skb); | |
729 | goto free_dst; | |
730 | } | |
731 | ||
abe492b4 | 732 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
8ed66f0e JL |
733 | if (IS_ERR(skb)) { |
734 | err = PTR_ERR(skb); | |
735 | goto free_dst; | |
736 | } | |
737 | ||
738 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
739 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
740 | ||
741 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
742 | return 0; | |
743 | ||
744 | free_dst: | |
745 | dst_release(dst); | |
746 | return err; | |
747 | } | |
748 | #endif | |
749 | ||
750 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
751 | struct net_device *dev, | |
752 | struct flowi4 *fl4, | |
753 | struct ip_tunnel_info *info) | |
e305ac6c PS |
754 | { |
755 | struct geneve_dev *geneve = netdev_priv(dev); | |
756 | struct rtable *rt = NULL; | |
757 | __u8 tos; | |
758 | ||
759 | memset(fl4, 0, sizeof(*fl4)); | |
760 | fl4->flowi4_mark = skb->mark; | |
761 | fl4->flowi4_proto = IPPROTO_UDP; | |
762 | ||
763 | if (info) { | |
764 | fl4->daddr = info->key.u.ipv4.dst; | |
765 | fl4->saddr = info->key.u.ipv4.src; | |
766 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
767 | } else { | |
768 | tos = geneve->tos; | |
769 | if (tos == 1) { | |
770 | const struct iphdr *iip = ip_hdr(skb); | |
771 | ||
772 | tos = ip_tunnel_get_dsfield(iip, skb); | |
773 | } | |
774 | ||
775 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 776 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
e305ac6c PS |
777 | } |
778 | ||
779 | rt = ip_route_output_key(geneve->net, fl4); | |
780 | if (IS_ERR(rt)) { | |
781 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 782 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
783 | } |
784 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
785 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 786 | ip_rt_put(rt); |
fc4099f1 | 787 | return ERR_PTR(-ELOOP); |
e305ac6c | 788 | } |
e305ac6c PS |
789 | return rt; |
790 | } | |
791 | ||
8ed66f0e JL |
792 | #if IS_ENABLED(CONFIG_IPV6) |
793 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
794 | struct net_device *dev, | |
795 | struct flowi6 *fl6, | |
796 | struct ip_tunnel_info *info) | |
797 | { | |
798 | struct geneve_dev *geneve = netdev_priv(dev); | |
799 | struct geneve_sock *gs6 = geneve->sock6; | |
800 | struct dst_entry *dst = NULL; | |
3a56f86f | 801 | __u8 prio; |
8ed66f0e JL |
802 | |
803 | memset(fl6, 0, sizeof(*fl6)); | |
804 | fl6->flowi6_mark = skb->mark; | |
805 | fl6->flowi6_proto = IPPROTO_UDP; | |
806 | ||
807 | if (info) { | |
808 | fl6->daddr = info->key.u.ipv6.dst; | |
809 | fl6->saddr = info->key.u.ipv6.src; | |
3a56f86f | 810 | fl6->flowi6_tos = RT_TOS(info->key.tos); |
8ed66f0e | 811 | } else { |
3a56f86f JL |
812 | prio = geneve->tos; |
813 | if (prio == 1) { | |
814 | const struct iphdr *iip = ip_hdr(skb); | |
815 | ||
816 | prio = ip_tunnel_get_dsfield(iip, skb); | |
817 | } | |
818 | ||
819 | fl6->flowi6_tos = RT_TOS(prio); | |
8ed66f0e JL |
820 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
821 | } | |
822 | ||
823 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
824 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
825 | return ERR_PTR(-ENETUNREACH); | |
826 | } | |
827 | if (dst->dev == dev) { /* is this necessary? */ | |
828 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
829 | dst_release(dst); | |
830 | return ERR_PTR(-ELOOP); | |
831 | } | |
832 | ||
833 | return dst; | |
834 | } | |
835 | #endif | |
836 | ||
e305ac6c PS |
837 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
838 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
839 | { | |
840 | #ifdef __BIG_ENDIAN | |
841 | vni[0] = (__force __u8)(tun_id >> 16); | |
842 | vni[1] = (__force __u8)(tun_id >> 8); | |
843 | vni[2] = (__force __u8)tun_id; | |
844 | #else | |
845 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
846 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
847 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
848 | #endif | |
849 | } | |
850 | ||
8ed66f0e JL |
851 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
852 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
853 | { |
854 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 855 | struct geneve_sock *gs4 = geneve->sock4; |
2d07dc79 | 856 | struct rtable *rt = NULL; |
08399efc | 857 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 858 | int err = -EINVAL; |
2d07dc79 | 859 | struct flowi4 fl4; |
8760ce58 | 860 | __u8 tos, ttl; |
e305ac6c | 861 | __be16 sport; |
371bd106 | 862 | __be16 df; |
8ed66f0e | 863 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 864 | u32 flags = geneve->flags; |
2d07dc79 | 865 | |
e305ac6c | 866 | if (geneve->collect_md) { |
8ed66f0e | 867 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
868 | netdev_dbg(dev, "no tunnel metadata\n"); |
869 | goto tx_error; | |
870 | } | |
7f9562a1 JB |
871 | if (info && ip_tunnel_info_af(info) != AF_INET) |
872 | goto tx_error; | |
e305ac6c | 873 | } |
980c394c | 874 | |
8ed66f0e | 875 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 876 | if (IS_ERR(rt)) { |
fc4099f1 | 877 | err = PTR_ERR(rt); |
2d07dc79 JL |
878 | goto tx_error; |
879 | } | |
371bd106 PS |
880 | |
881 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 882 | skb_reset_mac_header(skb); |
e305ac6c | 883 | |
08399efc JL |
884 | iip = ip_hdr(skb); |
885 | ||
e305ac6c PS |
886 | if (info) { |
887 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
888 | u8 *opts = NULL; |
889 | u8 vni[3]; | |
e305ac6c PS |
890 | |
891 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c | 892 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
4c222798 | 893 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 894 | |
abe492b4 TH |
895 | if (key->tun_flags & TUNNEL_CSUM) |
896 | flags |= GENEVE_F_UDP_CSUM; | |
897 | else | |
898 | flags &= ~GENEVE_F_UDP_CSUM; | |
899 | ||
371bd106 | 900 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 901 | info->options_len, opts, flags, xnet); |
371bd106 PS |
902 | if (unlikely(err)) |
903 | goto err; | |
904 | ||
08399efc | 905 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
906 | ttl = key->ttl; |
907 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 908 | } else { |
371bd106 | 909 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 910 | 0, NULL, flags, xnet); |
371bd106 PS |
911 | if (unlikely(err)) |
912 | goto err; | |
913 | ||
e305ac6c | 914 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
915 | ttl = geneve->ttl; |
916 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
917 | ttl = 1; | |
e305ac6c | 918 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 919 | df = 0; |
2d07dc79 | 920 | } |
039f5062 PS |
921 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
922 | tos, ttl, df, sport, geneve->dst_port, | |
923 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
924 | !(flags & GENEVE_F_UDP_CSUM)); | |
2d07dc79 | 925 | |
2d07dc79 JL |
926 | return NETDEV_TX_OK; |
927 | ||
2d07dc79 | 928 | tx_error: |
2d07dc79 | 929 | dev_kfree_skb(skb); |
371bd106 | 930 | err: |
fc4099f1 PS |
931 | if (err == -ELOOP) |
932 | dev->stats.collisions++; | |
933 | else if (err == -ENETUNREACH) | |
934 | dev->stats.tx_carrier_errors++; | |
935 | else | |
936 | dev->stats.tx_errors++; | |
2d07dc79 JL |
937 | return NETDEV_TX_OK; |
938 | } | |
939 | ||
8ed66f0e JL |
940 | #if IS_ENABLED(CONFIG_IPV6) |
941 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
942 | struct ip_tunnel_info *info) | |
943 | { | |
944 | struct geneve_dev *geneve = netdev_priv(dev); | |
945 | struct geneve_sock *gs6 = geneve->sock6; | |
946 | struct dst_entry *dst = NULL; | |
3a56f86f | 947 | const struct iphdr *iip; /* interior IP header */ |
8ed66f0e JL |
948 | int err = -EINVAL; |
949 | struct flowi6 fl6; | |
3a56f86f | 950 | __u8 prio, ttl; |
8ed66f0e | 951 | __be16 sport; |
8ed66f0e | 952 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 953 | u32 flags = geneve->flags; |
8ed66f0e JL |
954 | |
955 | if (geneve->collect_md) { | |
956 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
957 | netdev_dbg(dev, "no tunnel metadata\n"); | |
958 | goto tx_error; | |
959 | } | |
960 | } | |
961 | ||
962 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
963 | if (IS_ERR(dst)) { | |
964 | err = PTR_ERR(dst); | |
965 | goto tx_error; | |
966 | } | |
967 | ||
968 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
969 | skb_reset_mac_header(skb); | |
970 | ||
3a56f86f JL |
971 | iip = ip_hdr(skb); |
972 | ||
8ed66f0e JL |
973 | if (info) { |
974 | const struct ip_tunnel_key *key = &info->key; | |
975 | u8 *opts = NULL; | |
976 | u8 vni[3]; | |
977 | ||
978 | tunnel_id_to_vni(key->tun_id, vni); | |
979 | if (key->tun_flags & TUNNEL_GENEVE_OPT) | |
980 | opts = ip_tunnel_info_opts(info); | |
981 | ||
abe492b4 TH |
982 | if (key->tun_flags & TUNNEL_CSUM) |
983 | flags |= GENEVE_F_UDP_CSUM; | |
984 | else | |
985 | flags &= ~GENEVE_F_UDP_CSUM; | |
986 | ||
8ed66f0e JL |
987 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
988 | info->options_len, opts, | |
abe492b4 | 989 | flags, xnet); |
8ed66f0e JL |
990 | if (unlikely(err)) |
991 | goto err; | |
992 | ||
3a56f86f | 993 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e JL |
994 | ttl = key->ttl; |
995 | } else { | |
8ed66f0e | 996 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, |
abe492b4 | 997 | 0, NULL, flags, xnet); |
8ed66f0e JL |
998 | if (unlikely(err)) |
999 | goto err; | |
1000 | ||
3a56f86f | 1001 | prio = ip_tunnel_ecn_encap(fl6.flowi6_tos, iip, skb); |
8ed66f0e JL |
1002 | ttl = geneve->ttl; |
1003 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1004 | ttl = 1; | |
1005 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
1006 | } | |
039f5062 PS |
1007 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
1008 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
1009 | sport, geneve->dst_port, | |
1010 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1011 | return NETDEV_TX_OK; |
1012 | ||
1013 | tx_error: | |
1014 | dev_kfree_skb(skb); | |
1015 | err: | |
1016 | if (err == -ELOOP) | |
1017 | dev->stats.collisions++; | |
1018 | else if (err == -ENETUNREACH) | |
1019 | dev->stats.tx_carrier_errors++; | |
1020 | else | |
1021 | dev->stats.tx_errors++; | |
1022 | return NETDEV_TX_OK; | |
1023 | } | |
1024 | #endif | |
1025 | ||
1026 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1027 | { | |
1028 | struct geneve_dev *geneve = netdev_priv(dev); | |
1029 | struct ip_tunnel_info *info = NULL; | |
1030 | ||
1031 | if (geneve->collect_md) | |
1032 | info = skb_tunnel_info(skb); | |
1033 | ||
1034 | #if IS_ENABLED(CONFIG_IPV6) | |
1035 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1036 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1037 | return geneve6_xmit_skb(skb, dev, info); | |
1038 | #endif | |
1039 | return geneve_xmit_skb(skb, dev, info); | |
1040 | } | |
1041 | ||
fc4099f1 PS |
1042 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1043 | { | |
1044 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1045 | struct geneve_dev *geneve = netdev_priv(dev); | |
1046 | struct rtable *rt; | |
1047 | struct flowi4 fl4; | |
b8812fa8 JL |
1048 | #if IS_ENABLED(CONFIG_IPV6) |
1049 | struct dst_entry *dst; | |
1050 | struct flowi6 fl6; | |
1051 | #endif | |
fc4099f1 | 1052 | |
b8812fa8 JL |
1053 | if (ip_tunnel_info_af(info) == AF_INET) { |
1054 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1055 | if (IS_ERR(rt)) | |
1056 | return PTR_ERR(rt); | |
fc4099f1 | 1057 | |
b8812fa8 JL |
1058 | ip_rt_put(rt); |
1059 | info->key.u.ipv4.src = fl4.saddr; | |
1060 | #if IS_ENABLED(CONFIG_IPV6) | |
1061 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1062 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1063 | if (IS_ERR(dst)) | |
1064 | return PTR_ERR(dst); | |
1065 | ||
1066 | dst_release(dst); | |
1067 | info->key.u.ipv6.src = fl6.saddr; | |
1068 | #endif | |
1069 | } else { | |
1070 | return -EINVAL; | |
1071 | } | |
fc4099f1 | 1072 | |
fc4099f1 PS |
1073 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1074 | 1, USHRT_MAX, true); | |
1075 | info->key.tp_dst = geneve->dst_port; | |
1076 | return 0; | |
1077 | } | |
1078 | ||
2d07dc79 JL |
1079 | static const struct net_device_ops geneve_netdev_ops = { |
1080 | .ndo_init = geneve_init, | |
1081 | .ndo_uninit = geneve_uninit, | |
1082 | .ndo_open = geneve_open, | |
1083 | .ndo_stop = geneve_stop, | |
1084 | .ndo_start_xmit = geneve_xmit, | |
1085 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
1086 | .ndo_change_mtu = eth_change_mtu, | |
1087 | .ndo_validate_addr = eth_validate_addr, | |
1088 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1089 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1090 | }; |
1091 | ||
1092 | static void geneve_get_drvinfo(struct net_device *dev, | |
1093 | struct ethtool_drvinfo *drvinfo) | |
1094 | { | |
1095 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1096 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1097 | } | |
1098 | ||
1099 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1100 | .get_drvinfo = geneve_get_drvinfo, | |
1101 | .get_link = ethtool_op_get_link, | |
1102 | }; | |
1103 | ||
1104 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1105 | static struct device_type geneve_type = { | |
1106 | .name = "geneve", | |
1107 | }; | |
1108 | ||
05ca4029 SA |
1109 | /* Calls the ndo_add_geneve_port of the caller in order to |
1110 | * supply the listening GENEVE udp ports. Callers are expected | |
1111 | * to implement the ndo_add_geneve_port. | |
1112 | */ | |
1113 | void geneve_get_rx_port(struct net_device *dev) | |
1114 | { | |
1115 | struct net *net = dev_net(dev); | |
1116 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1117 | struct geneve_sock *gs; | |
1118 | sa_family_t sa_family; | |
1119 | struct sock *sk; | |
1120 | __be16 port; | |
1121 | ||
1122 | rcu_read_lock(); | |
1123 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { | |
1124 | sk = gs->sock->sk; | |
1125 | sa_family = sk->sk_family; | |
1126 | port = inet_sk(sk)->inet_sport; | |
1127 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, port); | |
1128 | } | |
1129 | rcu_read_unlock(); | |
1130 | } | |
1131 | EXPORT_SYMBOL_GPL(geneve_get_rx_port); | |
1132 | ||
2d07dc79 JL |
1133 | /* Initialize the device structure. */ |
1134 | static void geneve_setup(struct net_device *dev) | |
1135 | { | |
1136 | ether_setup(dev); | |
1137 | ||
1138 | dev->netdev_ops = &geneve_netdev_ops; | |
1139 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1140 | dev->destructor = free_netdev; | |
1141 | ||
1142 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1143 | ||
2d07dc79 JL |
1144 | dev->features |= NETIF_F_LLTX; |
1145 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1146 | dev->features |= NETIF_F_RXCSUM; | |
1147 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1148 | ||
2d07dc79 JL |
1149 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1150 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1151 | |
1152 | netif_keep_dst(dev); | |
ed961ac2 | 1153 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1154 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1155 | } |
1156 | ||
1157 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1158 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1159 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1160 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1161 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1162 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 1163 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1164 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1165 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1166 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1167 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1168 | }; |
1169 | ||
1170 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1171 | { | |
1172 | if (tb[IFLA_ADDRESS]) { | |
1173 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1174 | return -EINVAL; | |
1175 | ||
1176 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1177 | return -EADDRNOTAVAIL; | |
1178 | } | |
1179 | ||
1180 | if (!data) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | if (data[IFLA_GENEVE_ID]) { | |
1184 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1185 | ||
1186 | if (vni >= GENEVE_VID_MASK) | |
1187 | return -ERANGE; | |
1188 | } | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
371bd106 PS |
1193 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1194 | __be16 dst_port, | |
8ed66f0e | 1195 | union geneve_addr *remote, |
371bd106 PS |
1196 | u8 vni[], |
1197 | bool *tun_on_same_port, | |
1198 | bool *tun_collect_md) | |
1199 | { | |
1200 | struct geneve_dev *geneve, *t; | |
1201 | ||
1202 | *tun_on_same_port = false; | |
1203 | *tun_collect_md = false; | |
1204 | t = NULL; | |
1205 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1206 | if (geneve->dst_port == dst_port) { | |
1207 | *tun_collect_md = geneve->collect_md; | |
1208 | *tun_on_same_port = true; | |
1209 | } | |
1210 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1211 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1212 | dst_port == geneve->dst_port) |
1213 | t = geneve; | |
1214 | } | |
1215 | return t; | |
1216 | } | |
1217 | ||
e305ac6c | 1218 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e JL |
1219 | union geneve_addr *remote, |
1220 | __u32 vni, __u8 ttl, __u8 tos, __be16 dst_port, | |
abe492b4 | 1221 | bool metadata, u32 flags) |
2d07dc79 JL |
1222 | { |
1223 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1224 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1225 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1226 | int err, encap_len; |
2d07dc79 | 1227 | |
8ed66f0e JL |
1228 | if (!remote) |
1229 | return -EINVAL; | |
1230 | if (metadata && | |
1231 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl)) | |
1232 | return -EINVAL; | |
2d07dc79 JL |
1233 | |
1234 | geneve->net = net; | |
1235 | geneve->dev = dev; | |
1236 | ||
2d07dc79 JL |
1237 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1238 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1239 | geneve->vni[2] = vni & 0x000000ff; | |
1240 | ||
8ed66f0e JL |
1241 | if ((remote->sa.sa_family == AF_INET && |
1242 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1243 | (remote->sa.sa_family == AF_INET6 && | |
1244 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1245 | return -EINVAL; |
8ed66f0e | 1246 | geneve->remote = *remote; |
2d07dc79 | 1247 | |
e305ac6c PS |
1248 | geneve->ttl = ttl; |
1249 | geneve->tos = tos; | |
7bbe33ff | 1250 | geneve->dst_port = dst_port; |
e305ac6c | 1251 | geneve->collect_md = metadata; |
abe492b4 | 1252 | geneve->flags = flags; |
e305ac6c | 1253 | |
8ed66f0e | 1254 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1255 | &tun_on_same_port, &tun_collect_md); |
1256 | if (t) | |
1257 | return -EBUSY; | |
1258 | ||
184fc8b5 PA |
1259 | /* make enough headroom for basic scenario */ |
1260 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1261 | if (remote->sa.sa_family == AF_INET) | |
1262 | encap_len += sizeof(struct iphdr); | |
1263 | else | |
1264 | encap_len += sizeof(struct ipv6hdr); | |
1265 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1266 | ||
371bd106 PS |
1267 | if (metadata) { |
1268 | if (tun_on_same_port) | |
1269 | return -EPERM; | |
1270 | } else { | |
1271 | if (tun_collect_md) | |
1272 | return -EPERM; | |
1273 | } | |
1274 | ||
2d07dc79 JL |
1275 | err = register_netdevice(dev); |
1276 | if (err) | |
1277 | return err; | |
1278 | ||
e305ac6c | 1279 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1280 | return 0; |
1281 | } | |
1282 | ||
1283 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1284 | struct nlattr *tb[], struct nlattr *data[]) | |
1285 | { | |
7bbe33ff | 1286 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1287 | __u8 ttl = 0, tos = 0; |
1288 | bool metadata = false; | |
8ed66f0e | 1289 | union geneve_addr remote = geneve_remote_unspec; |
e277de5f | 1290 | __u32 vni = 0; |
abe492b4 | 1291 | u32 flags = 0; |
e305ac6c | 1292 | |
8ed66f0e JL |
1293 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1294 | return -EINVAL; | |
1295 | ||
1296 | if (data[IFLA_GENEVE_REMOTE]) { | |
1297 | remote.sa.sa_family = AF_INET; | |
1298 | remote.sin.sin_addr.s_addr = | |
1299 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1300 | } | |
1301 | ||
1302 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1303 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1304 | return -EPFNOSUPPORT; | |
1305 | ||
1306 | remote.sa.sa_family = AF_INET6; | |
1307 | remote.sin6.sin6_addr = | |
1308 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1309 | ||
1310 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1311 | IPV6_ADDR_LINKLOCAL) { | |
1312 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | } | |
1316 | ||
e277de5f JG |
1317 | if (data[IFLA_GENEVE_ID]) |
1318 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1319 | |
8760ce58 | 1320 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1321 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1322 | |
d8951125 | 1323 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1324 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1325 | |
e305ac6c | 1326 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1327 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1328 | |
e305ac6c PS |
1329 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1330 | metadata = true; | |
2d07dc79 | 1331 | |
abe492b4 TH |
1332 | if (data[IFLA_GENEVE_UDP_CSUM] && |
1333 | nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) | |
1334 | flags |= GENEVE_F_UDP_CSUM; | |
1335 | ||
1336 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1337 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1338 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1339 | ||
1340 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1341 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1342 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1343 | ||
8ed66f0e | 1344 | return geneve_configure(net, dev, &remote, vni, ttl, tos, dst_port, |
abe492b4 | 1345 | metadata, flags); |
2d07dc79 JL |
1346 | } |
1347 | ||
1348 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1349 | { | |
1350 | struct geneve_dev *geneve = netdev_priv(dev); | |
1351 | ||
2d07dc79 JL |
1352 | list_del(&geneve->next); |
1353 | unregister_netdevice_queue(dev, head); | |
1354 | } | |
1355 | ||
1356 | static size_t geneve_get_size(const struct net_device *dev) | |
1357 | { | |
1358 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1359 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1360 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1361 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
7bbe33ff | 1362 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1363 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1364 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1365 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1366 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1367 | 0; |
1368 | } | |
1369 | ||
1370 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1371 | { | |
1372 | struct geneve_dev *geneve = netdev_priv(dev); | |
1373 | __u32 vni; | |
1374 | ||
1375 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1376 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1377 | goto nla_put_failure; | |
1378 | ||
8ed66f0e JL |
1379 | if (geneve->remote.sa.sa_family == AF_INET) { |
1380 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1381 | geneve->remote.sin.sin_addr.s_addr)) | |
1382 | goto nla_put_failure; | |
1383 | #if IS_ENABLED(CONFIG_IPV6) | |
1384 | } else { | |
1385 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1386 | &geneve->remote.sin6.sin6_addr)) | |
1387 | goto nla_put_failure; | |
1388 | #endif | |
1389 | } | |
2d07dc79 | 1390 | |
d8951125 JL |
1391 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
1392 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
1393 | goto nla_put_failure; |
1394 | ||
7bbe33ff | 1395 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1396 | goto nla_put_failure; |
1397 | ||
e305ac6c PS |
1398 | if (geneve->collect_md) { |
1399 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1400 | goto nla_put_failure; | |
1401 | } | |
1402 | ||
abe492b4 TH |
1403 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1404 | !!(geneve->flags & GENEVE_F_UDP_CSUM)) || | |
1405 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1406 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1407 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1408 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1409 | goto nla_put_failure; | |
1410 | ||
2d07dc79 JL |
1411 | return 0; |
1412 | ||
1413 | nla_put_failure: | |
1414 | return -EMSGSIZE; | |
1415 | } | |
1416 | ||
1417 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1418 | .kind = "geneve", | |
1419 | .maxtype = IFLA_GENEVE_MAX, | |
1420 | .policy = geneve_policy, | |
1421 | .priv_size = sizeof(struct geneve_dev), | |
1422 | .setup = geneve_setup, | |
1423 | .validate = geneve_validate, | |
1424 | .newlink = geneve_newlink, | |
1425 | .dellink = geneve_dellink, | |
1426 | .get_size = geneve_get_size, | |
1427 | .fill_info = geneve_fill_info, | |
1428 | }; | |
1429 | ||
e305ac6c PS |
1430 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1431 | u8 name_assign_type, u16 dst_port) | |
1432 | { | |
1433 | struct nlattr *tb[IFLA_MAX + 1]; | |
1434 | struct net_device *dev; | |
1435 | int err; | |
1436 | ||
1437 | memset(tb, 0, sizeof(tb)); | |
1438 | dev = rtnl_create_link(net, name, name_assign_type, | |
1439 | &geneve_link_ops, tb); | |
1440 | if (IS_ERR(dev)) | |
1441 | return dev; | |
1442 | ||
8ed66f0e | 1443 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
abe492b4 | 1444 | 0, 0, 0, htons(dst_port), true, 0); |
e305ac6c PS |
1445 | if (err) { |
1446 | free_netdev(dev); | |
1447 | return ERR_PTR(err); | |
1448 | } | |
1449 | return dev; | |
1450 | } | |
1451 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1452 | ||
2d07dc79 JL |
1453 | static __net_init int geneve_init_net(struct net *net) |
1454 | { | |
1455 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1456 | |
1457 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1458 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1459 | return 0; |
1460 | } | |
1461 | ||
1462 | static void __net_exit geneve_exit_net(struct net *net) | |
1463 | { | |
1464 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1465 | struct geneve_dev *geneve, *next; | |
1466 | struct net_device *dev, *aux; | |
1467 | LIST_HEAD(list); | |
1468 | ||
1469 | rtnl_lock(); | |
1470 | ||
1471 | /* gather any geneve devices that were moved into this ns */ | |
1472 | for_each_netdev_safe(net, dev, aux) | |
1473 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1474 | unregister_netdevice_queue(dev, &list); | |
1475 | ||
1476 | /* now gather any other geneve devices that were created in this ns */ | |
1477 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1478 | /* If geneve->dev is in the same netns, it was already added | |
1479 | * to the list by the previous loop. | |
1480 | */ | |
1481 | if (!net_eq(dev_net(geneve->dev), net)) | |
1482 | unregister_netdevice_queue(geneve->dev, &list); | |
1483 | } | |
1484 | ||
1485 | /* unregister the devices gathered above */ | |
1486 | unregister_netdevice_many(&list); | |
1487 | rtnl_unlock(); | |
1488 | } | |
1489 | ||
1490 | static struct pernet_operations geneve_net_ops = { | |
1491 | .init = geneve_init_net, | |
1492 | .exit = geneve_exit_net, | |
1493 | .id = &geneve_net_id, | |
1494 | .size = sizeof(struct geneve_net), | |
1495 | }; | |
1496 | ||
1497 | static int __init geneve_init_module(void) | |
1498 | { | |
1499 | int rc; | |
1500 | ||
1501 | rc = register_pernet_subsys(&geneve_net_ops); | |
1502 | if (rc) | |
1503 | goto out1; | |
1504 | ||
1505 | rc = rtnl_link_register(&geneve_link_ops); | |
1506 | if (rc) | |
1507 | goto out2; | |
1508 | ||
1509 | return 0; | |
1510 | out2: | |
1511 | unregister_pernet_subsys(&geneve_net_ops); | |
1512 | out1: | |
1513 | return rc; | |
1514 | } | |
1515 | late_initcall(geneve_init_module); | |
1516 | ||
1517 | static void __exit geneve_cleanup_module(void) | |
1518 | { | |
1519 | rtnl_link_unregister(&geneve_link_ops); | |
1520 | unregister_pernet_subsys(&geneve_net_ops); | |
1521 | } | |
1522 | module_exit(geneve_cleanup_module); | |
1523 | ||
1524 | MODULE_LICENSE("GPL"); | |
1525 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1526 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1527 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1528 | MODULE_ALIAS_RTNL_LINK("geneve"); |