]>
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; |
468dfffc | 75 | struct dst_cache dst_cache; |
2d07dc79 JL |
76 | }; |
77 | ||
abe492b4 TH |
78 | /* Geneve device flags */ |
79 | #define GENEVE_F_UDP_CSUM BIT(0) | |
80 | #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1) | |
81 | #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2) | |
82 | ||
371bd106 PS |
83 | struct geneve_sock { |
84 | bool collect_md; | |
371bd106 PS |
85 | struct list_head list; |
86 | struct socket *sock; | |
87 | struct rcu_head rcu; | |
88 | int refcnt; | |
89 | struct udp_offload udp_offloads; | |
66d47003 | 90 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
abe492b4 | 91 | u32 flags; |
371bd106 | 92 | }; |
2d07dc79 JL |
93 | |
94 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
95 | { | |
96 | __u32 vnid; | |
97 | ||
98 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
99 | return hash_32(vnid, VNI_HASH_BITS); | |
100 | } | |
101 | ||
e305ac6c PS |
102 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
103 | { | |
104 | #ifdef __BIG_ENDIAN | |
105 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
106 | #else | |
107 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
108 | ((__force u64)vni[1] << 48) | | |
109 | ((__force u64)vni[2] << 56)); | |
110 | #endif | |
111 | } | |
112 | ||
66d47003 | 113 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 114 | __be32 addr, u8 vni[]) |
2d07dc79 | 115 | { |
2d07dc79 | 116 | struct hlist_head *vni_list_head; |
e305ac6c | 117 | struct geneve_dev *geneve; |
2d07dc79 JL |
118 | __u32 hash; |
119 | ||
2d07dc79 | 120 | /* Find the device for this VNI */ |
371bd106 | 121 | hash = geneve_net_vni_hash(vni); |
66d47003 | 122 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 123 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 124 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
8ed66f0e JL |
125 | addr == geneve->remote.sin.sin_addr.s_addr) |
126 | return geneve; | |
127 | } | |
128 | return NULL; | |
129 | } | |
130 | ||
131 | #if IS_ENABLED(CONFIG_IPV6) | |
132 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
133 | struct in6_addr addr6, u8 vni[]) | |
134 | { | |
135 | struct hlist_head *vni_list_head; | |
136 | struct geneve_dev *geneve; | |
137 | __u32 hash; | |
138 | ||
139 | /* Find the device for this VNI */ | |
140 | hash = geneve_net_vni_hash(vni); | |
141 | vni_list_head = &gs->vni_list[hash]; | |
142 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
143 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
144 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e305ac6c | 145 | return geneve; |
2d07dc79 | 146 | } |
e305ac6c PS |
147 | return NULL; |
148 | } | |
8ed66f0e | 149 | #endif |
e305ac6c | 150 | |
371bd106 PS |
151 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
152 | { | |
153 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
154 | } | |
155 | ||
e305ac6c PS |
156 | /* geneve receive/decap routine */ |
157 | static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) | |
158 | { | |
159 | struct genevehdr *gnvh = geneve_hdr(skb); | |
160 | struct metadata_dst *tun_dst = NULL; | |
161 | struct geneve_dev *geneve = NULL; | |
162 | struct pcpu_sw_netstats *stats; | |
8ed66f0e | 163 | struct iphdr *iph = NULL; |
371bd106 | 164 | __be32 addr; |
8ed66f0e JL |
165 | static u8 zero_vni[3]; |
166 | u8 *vni; | |
167 | int err = 0; | |
168 | sa_family_t sa_family; | |
169 | #if IS_ENABLED(CONFIG_IPV6) | |
170 | struct ipv6hdr *ip6h = NULL; | |
171 | struct in6_addr addr6; | |
172 | static struct in6_addr zero_addr6; | |
173 | #endif | |
e305ac6c | 174 | |
8ed66f0e | 175 | sa_family = gs->sock->sk->sk_family; |
08399efc | 176 | |
8ed66f0e JL |
177 | if (sa_family == AF_INET) { |
178 | iph = ip_hdr(skb); /* outer IP header... */ | |
371bd106 | 179 | |
8ed66f0e JL |
180 | if (gs->collect_md) { |
181 | vni = zero_vni; | |
182 | addr = 0; | |
183 | } else { | |
184 | vni = gnvh->vni; | |
185 | ||
186 | addr = iph->saddr; | |
187 | } | |
188 | ||
189 | geneve = geneve_lookup(gs, addr, vni); | |
190 | #if IS_ENABLED(CONFIG_IPV6) | |
191 | } else if (sa_family == AF_INET6) { | |
192 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ | |
371bd106 | 193 | |
8ed66f0e JL |
194 | if (gs->collect_md) { |
195 | vni = zero_vni; | |
196 | addr6 = zero_addr6; | |
197 | } else { | |
198 | vni = gnvh->vni; | |
199 | ||
200 | addr6 = ip6h->saddr; | |
201 | } | |
202 | ||
203 | geneve = geneve6_lookup(gs, addr6, vni); | |
204 | #endif | |
205 | } | |
2d07dc79 JL |
206 | if (!geneve) |
207 | goto drop; | |
208 | ||
371bd106 | 209 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 210 | __be16 flags; |
e305ac6c PS |
211 | |
212 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
213 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
214 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
215 | ||
8ed66f0e | 216 | tun_dst = udp_tun_rx_dst(skb, sa_family, flags, |
e305ac6c PS |
217 | vni_to_tunnel_id(gnvh->vni), |
218 | gnvh->opt_len * 4); | |
219 | if (!tun_dst) | |
220 | goto drop; | |
e305ac6c | 221 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
222 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
223 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
224 | } else { |
225 | /* Drop packets w/ critical options, | |
226 | * since we don't support any... | |
227 | */ | |
228 | if (gnvh->critical) | |
229 | goto drop; | |
230 | } | |
2d07dc79 JL |
231 | |
232 | skb_reset_mac_header(skb); | |
233 | skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); | |
234 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
235 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
236 | ||
e305ac6c PS |
237 | if (tun_dst) |
238 | skb_dst_set(skb, &tun_dst->dst); | |
239 | ||
2d07dc79 JL |
240 | /* Ignore packet loops (and multicast echo) */ |
241 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
242 | goto drop; | |
243 | ||
244 | skb_reset_network_header(skb); | |
245 | ||
8ed66f0e JL |
246 | if (iph) |
247 | err = IP_ECN_decapsulate(iph, skb); | |
248 | #if IS_ENABLED(CONFIG_IPV6) | |
249 | if (ip6h) | |
250 | err = IP6_ECN_decapsulate(ip6h, skb); | |
251 | #endif | |
2d07dc79 JL |
252 | |
253 | if (unlikely(err)) { | |
8ed66f0e JL |
254 | if (log_ecn_error) { |
255 | if (iph) | |
256 | net_info_ratelimited("non-ECT from %pI4 " | |
257 | "with TOS=%#x\n", | |
258 | &iph->saddr, iph->tos); | |
259 | #if IS_ENABLED(CONFIG_IPV6) | |
260 | if (ip6h) | |
261 | net_info_ratelimited("non-ECT from %pI6\n", | |
262 | &ip6h->saddr); | |
263 | #endif | |
264 | } | |
2d07dc79 JL |
265 | if (err > 1) { |
266 | ++geneve->dev->stats.rx_frame_errors; | |
267 | ++geneve->dev->stats.rx_errors; | |
268 | goto drop; | |
269 | } | |
270 | } | |
271 | ||
272 | stats = this_cpu_ptr(geneve->dev->tstats); | |
273 | u64_stats_update_begin(&stats->syncp); | |
274 | stats->rx_packets++; | |
275 | stats->rx_bytes += skb->len; | |
276 | u64_stats_update_end(&stats->syncp); | |
277 | ||
8e816df8 | 278 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
279 | return; |
280 | drop: | |
281 | /* Consume bad packet */ | |
282 | kfree_skb(skb); | |
283 | } | |
284 | ||
285 | /* Setup stats when device is created */ | |
286 | static int geneve_init(struct net_device *dev) | |
287 | { | |
8e816df8 JG |
288 | struct geneve_dev *geneve = netdev_priv(dev); |
289 | int err; | |
290 | ||
2d07dc79 JL |
291 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
292 | if (!dev->tstats) | |
293 | return -ENOMEM; | |
8e816df8 JG |
294 | |
295 | err = gro_cells_init(&geneve->gro_cells, dev); | |
296 | if (err) { | |
297 | free_percpu(dev->tstats); | |
298 | return err; | |
299 | } | |
300 | ||
468dfffc PA |
301 | err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL); |
302 | if (err) { | |
303 | free_percpu(dev->tstats); | |
304 | gro_cells_destroy(&geneve->gro_cells); | |
305 | return err; | |
306 | } | |
307 | ||
2d07dc79 JL |
308 | return 0; |
309 | } | |
310 | ||
311 | static void geneve_uninit(struct net_device *dev) | |
312 | { | |
8e816df8 JG |
313 | struct geneve_dev *geneve = netdev_priv(dev); |
314 | ||
468dfffc | 315 | dst_cache_destroy(&geneve->dst_cache); |
8e816df8 | 316 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
317 | free_percpu(dev->tstats); |
318 | } | |
319 | ||
371bd106 PS |
320 | /* Callback from net/ipv4/udp.c to receive packets */ |
321 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
322 | { | |
323 | struct genevehdr *geneveh; | |
324 | struct geneve_sock *gs; | |
325 | int opts_len; | |
326 | ||
327 | /* Need Geneve and inner Ethernet header to be present */ | |
328 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
329 | goto error; | |
330 | ||
331 | /* Return packets with reserved bits set */ | |
332 | geneveh = geneve_hdr(skb); | |
333 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
334 | goto error; | |
335 | ||
336 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
337 | goto error; | |
338 | ||
339 | opts_len = geneveh->opt_len * 4; | |
340 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
341 | htons(ETH_P_TEB))) | |
342 | goto drop; | |
343 | ||
344 | gs = rcu_dereference_sk_user_data(sk); | |
345 | if (!gs) | |
346 | goto drop; | |
347 | ||
348 | geneve_rx(gs, skb); | |
349 | return 0; | |
350 | ||
351 | drop: | |
352 | /* Consume bad packet */ | |
353 | kfree_skb(skb); | |
354 | return 0; | |
355 | ||
356 | error: | |
357 | /* Let the UDP layer deal with the skb */ | |
358 | return 1; | |
359 | } | |
360 | ||
361 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
abe492b4 | 362 | __be16 port, u32 flags) |
371bd106 PS |
363 | { |
364 | struct socket *sock; | |
365 | struct udp_port_cfg udp_conf; | |
366 | int err; | |
367 | ||
368 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
369 | ||
370 | if (ipv6) { | |
371 | udp_conf.family = AF_INET6; | |
8ed66f0e | 372 | udp_conf.ipv6_v6only = 1; |
abe492b4 TH |
373 | udp_conf.use_udp6_rx_checksums = |
374 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
371bd106 PS |
375 | } else { |
376 | udp_conf.family = AF_INET; | |
377 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
378 | } | |
379 | ||
380 | udp_conf.local_udp_port = port; | |
381 | ||
382 | /* Open UDP socket */ | |
383 | err = udp_sock_create(net, &udp_conf, &sock); | |
384 | if (err < 0) | |
385 | return ERR_PTR(err); | |
386 | ||
387 | return sock; | |
388 | } | |
389 | ||
390 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
391 | { | |
a8170d2b | 392 | struct net_device *dev; |
371bd106 | 393 | struct sock *sk = gs->sock->sk; |
a8170d2b | 394 | struct net *net = sock_net(sk); |
371bd106 | 395 | sa_family_t sa_family = sk->sk_family; |
a8170d2b | 396 | __be16 port = inet_sk(sk)->inet_sport; |
371bd106 PS |
397 | int err; |
398 | ||
399 | if (sa_family == AF_INET) { | |
787d7ac3 | 400 | err = udp_add_offload(sock_net(sk), &gs->udp_offloads); |
371bd106 PS |
401 | if (err) |
402 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
403 | err); | |
404 | } | |
a8170d2b SA |
405 | |
406 | rcu_read_lock(); | |
407 | for_each_netdev_rcu(net, dev) { | |
408 | if (dev->netdev_ops->ndo_add_geneve_port) | |
409 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, | |
410 | port); | |
411 | } | |
412 | rcu_read_unlock(); | |
371bd106 PS |
413 | } |
414 | ||
415 | static int geneve_hlen(struct genevehdr *gh) | |
416 | { | |
417 | return sizeof(*gh) + gh->opt_len * 4; | |
418 | } | |
419 | ||
420 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
421 | struct sk_buff *skb, | |
422 | struct udp_offload *uoff) | |
423 | { | |
424 | struct sk_buff *p, **pp = NULL; | |
425 | struct genevehdr *gh, *gh2; | |
426 | unsigned int hlen, gh_len, off_gnv; | |
427 | const struct packet_offload *ptype; | |
428 | __be16 type; | |
429 | int flush = 1; | |
430 | ||
431 | off_gnv = skb_gro_offset(skb); | |
432 | hlen = off_gnv + sizeof(*gh); | |
433 | gh = skb_gro_header_fast(skb, off_gnv); | |
434 | if (skb_gro_header_hard(skb, hlen)) { | |
435 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
436 | if (unlikely(!gh)) | |
437 | goto out; | |
438 | } | |
439 | ||
440 | if (gh->ver != GENEVE_VER || gh->oam) | |
441 | goto out; | |
442 | gh_len = geneve_hlen(gh); | |
443 | ||
444 | hlen = off_gnv + gh_len; | |
445 | if (skb_gro_header_hard(skb, hlen)) { | |
446 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
447 | if (unlikely(!gh)) | |
448 | goto out; | |
449 | } | |
450 | ||
451 | flush = 0; | |
452 | ||
453 | for (p = *head; p; p = p->next) { | |
454 | if (!NAPI_GRO_CB(p)->same_flow) | |
455 | continue; | |
456 | ||
457 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
458 | if (gh->opt_len != gh2->opt_len || | |
459 | memcmp(gh, gh2, gh_len)) { | |
460 | NAPI_GRO_CB(p)->same_flow = 0; | |
461 | continue; | |
462 | } | |
463 | } | |
464 | ||
465 | type = gh->proto_type; | |
466 | ||
467 | rcu_read_lock(); | |
468 | ptype = gro_find_receive_by_type(type); | |
469 | if (!ptype) { | |
470 | flush = 1; | |
471 | goto out_unlock; | |
472 | } | |
473 | ||
474 | skb_gro_pull(skb, gh_len); | |
475 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
476 | pp = ptype->callbacks.gro_receive(head, skb); | |
477 | ||
478 | out_unlock: | |
479 | rcu_read_unlock(); | |
480 | out: | |
481 | NAPI_GRO_CB(skb)->flush |= flush; | |
482 | ||
483 | return pp; | |
484 | } | |
485 | ||
486 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
487 | struct udp_offload *uoff) | |
488 | { | |
489 | struct genevehdr *gh; | |
490 | struct packet_offload *ptype; | |
491 | __be16 type; | |
492 | int gh_len; | |
493 | int err = -ENOSYS; | |
494 | ||
495 | udp_tunnel_gro_complete(skb, nhoff); | |
496 | ||
497 | gh = (struct genevehdr *)(skb->data + nhoff); | |
498 | gh_len = geneve_hlen(gh); | |
499 | type = gh->proto_type; | |
500 | ||
501 | rcu_read_lock(); | |
502 | ptype = gro_find_complete_by_type(type); | |
503 | if (ptype) | |
504 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
505 | ||
506 | rcu_read_unlock(); | |
507 | return err; | |
508 | } | |
509 | ||
510 | /* Create new listen socket if needed */ | |
511 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
abe492b4 | 512 | bool ipv6, u32 flags) |
371bd106 PS |
513 | { |
514 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
515 | struct geneve_sock *gs; | |
516 | struct socket *sock; | |
517 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 518 | int h; |
371bd106 PS |
519 | |
520 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
521 | if (!gs) | |
522 | return ERR_PTR(-ENOMEM); | |
523 | ||
abe492b4 | 524 | sock = geneve_create_sock(net, ipv6, port, flags); |
371bd106 PS |
525 | if (IS_ERR(sock)) { |
526 | kfree(gs); | |
527 | return ERR_CAST(sock); | |
528 | } | |
529 | ||
530 | gs->sock = sock; | |
531 | gs->refcnt = 1; | |
66d47003 PS |
532 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
533 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
534 | |
535 | /* Initialize the geneve udp offloads structure */ | |
536 | gs->udp_offloads.port = port; | |
537 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
538 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
539 | geneve_notify_add_rx_port(gs); | |
540 | ||
541 | /* Mark socket as an encapsulation socket */ | |
542 | tunnel_cfg.sk_user_data = gs; | |
543 | tunnel_cfg.encap_type = 1; | |
544 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
545 | tunnel_cfg.encap_destroy = NULL; | |
546 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
547 | list_add(&gs->list, &gn->sock_list); |
548 | return gs; | |
549 | } | |
550 | ||
551 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
552 | { | |
a8170d2b | 553 | struct net_device *dev; |
371bd106 | 554 | struct sock *sk = gs->sock->sk; |
a8170d2b | 555 | struct net *net = sock_net(sk); |
371bd106 | 556 | sa_family_t sa_family = sk->sk_family; |
a8170d2b SA |
557 | __be16 port = inet_sk(sk)->inet_sport; |
558 | ||
559 | rcu_read_lock(); | |
560 | for_each_netdev_rcu(net, dev) { | |
561 | if (dev->netdev_ops->ndo_del_geneve_port) | |
562 | dev->netdev_ops->ndo_del_geneve_port(dev, sa_family, | |
563 | port); | |
564 | } | |
565 | ||
566 | rcu_read_unlock(); | |
371bd106 PS |
567 | |
568 | if (sa_family == AF_INET) | |
569 | udp_del_offload(&gs->udp_offloads); | |
570 | } | |
571 | ||
8ed66f0e | 572 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 573 | { |
8ed66f0e | 574 | if (!gs || --gs->refcnt) |
371bd106 PS |
575 | return; |
576 | ||
577 | list_del(&gs->list); | |
578 | geneve_notify_del_rx_port(gs); | |
579 | udp_tunnel_sock_release(gs->sock); | |
580 | kfree_rcu(gs, rcu); | |
581 | } | |
582 | ||
8ed66f0e JL |
583 | static void geneve_sock_release(struct geneve_dev *geneve) |
584 | { | |
585 | __geneve_sock_release(geneve->sock4); | |
586 | #if IS_ENABLED(CONFIG_IPV6) | |
587 | __geneve_sock_release(geneve->sock6); | |
588 | #endif | |
589 | } | |
590 | ||
371bd106 | 591 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 592 | sa_family_t family, |
371bd106 PS |
593 | __be16 dst_port) |
594 | { | |
595 | struct geneve_sock *gs; | |
596 | ||
597 | list_for_each_entry(gs, &gn->sock_list, list) { | |
598 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
8ed66f0e | 599 | inet_sk(gs->sock->sk)->sk.sk_family == family) { |
371bd106 PS |
600 | return gs; |
601 | } | |
602 | } | |
603 | return NULL; | |
604 | } | |
605 | ||
8ed66f0e | 606 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 607 | { |
2d07dc79 | 608 | struct net *net = geneve->net; |
371bd106 | 609 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 610 | struct geneve_sock *gs; |
66d47003 | 611 | __u32 hash; |
2d07dc79 | 612 | |
8ed66f0e | 613 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
614 | if (gs) { |
615 | gs->refcnt++; | |
616 | goto out; | |
617 | } | |
618 | ||
abe492b4 | 619 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
620 | if (IS_ERR(gs)) |
621 | return PTR_ERR(gs); | |
622 | ||
371bd106 PS |
623 | out: |
624 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 625 | gs->flags = geneve->flags; |
8ed66f0e JL |
626 | #if IS_ENABLED(CONFIG_IPV6) |
627 | if (ipv6) | |
628 | geneve->sock6 = gs; | |
629 | else | |
630 | #endif | |
631 | geneve->sock4 = gs; | |
66d47003 PS |
632 | |
633 | hash = geneve_net_vni_hash(geneve->vni); | |
634 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
635 | return 0; |
636 | } | |
637 | ||
8ed66f0e JL |
638 | static int geneve_open(struct net_device *dev) |
639 | { | |
640 | struct geneve_dev *geneve = netdev_priv(dev); | |
641 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
642 | bool metadata = geneve->collect_md; | |
643 | int ret = 0; | |
644 | ||
645 | geneve->sock4 = NULL; | |
646 | #if IS_ENABLED(CONFIG_IPV6) | |
647 | geneve->sock6 = NULL; | |
648 | if (ipv6 || metadata) | |
649 | ret = geneve_sock_add(geneve, true); | |
650 | #endif | |
651 | if (!ret && (!ipv6 || metadata)) | |
652 | ret = geneve_sock_add(geneve, false); | |
653 | if (ret < 0) | |
654 | geneve_sock_release(geneve); | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
2d07dc79 JL |
659 | static int geneve_stop(struct net_device *dev) |
660 | { | |
661 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 662 | |
66d47003 PS |
663 | if (!hlist_unhashed(&geneve->hlist)) |
664 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 665 | geneve_sock_release(geneve); |
371bd106 PS |
666 | return 0; |
667 | } | |
668 | ||
8ed66f0e JL |
669 | static void geneve_build_header(struct genevehdr *geneveh, |
670 | __be16 tun_flags, u8 vni[3], | |
671 | u8 options_len, u8 *options) | |
672 | { | |
673 | geneveh->ver = GENEVE_VER; | |
674 | geneveh->opt_len = options_len / 4; | |
675 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
676 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
677 | geneveh->rsvd1 = 0; | |
678 | memcpy(geneveh->vni, vni, 3); | |
679 | geneveh->proto_type = htons(ETH_P_TEB); | |
680 | geneveh->rsvd2 = 0; | |
681 | ||
682 | memcpy(geneveh->options, options, options_len); | |
683 | } | |
684 | ||
371bd106 PS |
685 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
686 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 687 | u32 flags, bool xnet) |
371bd106 PS |
688 | { |
689 | struct genevehdr *gnvh; | |
690 | int min_headroom; | |
691 | int err; | |
abe492b4 | 692 | bool udp_sum = !!(flags & GENEVE_F_UDP_CSUM); |
2d07dc79 | 693 | |
8ed66f0e JL |
694 | skb_scrub_packet(skb, xnet); |
695 | ||
371bd106 PS |
696 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
697 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
698 | err = skb_cow_head(skb, min_headroom); | |
699 | if (unlikely(err)) { | |
700 | kfree_skb(skb); | |
701 | goto free_rt; | |
702 | } | |
703 | ||
abe492b4 | 704 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
371bd106 PS |
705 | if (IS_ERR(skb)) { |
706 | err = PTR_ERR(skb); | |
707 | goto free_rt; | |
708 | } | |
709 | ||
710 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 711 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
712 | |
713 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 714 | return 0; |
371bd106 PS |
715 | |
716 | free_rt: | |
717 | ip_rt_put(rt); | |
718 | return err; | |
2d07dc79 JL |
719 | } |
720 | ||
8ed66f0e JL |
721 | #if IS_ENABLED(CONFIG_IPV6) |
722 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
723 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 724 | u32 flags, bool xnet) |
8ed66f0e JL |
725 | { |
726 | struct genevehdr *gnvh; | |
727 | int min_headroom; | |
728 | int err; | |
abe492b4 | 729 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
730 | |
731 | skb_scrub_packet(skb, xnet); | |
732 | ||
733 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
734 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
735 | err = skb_cow_head(skb, min_headroom); | |
736 | if (unlikely(err)) { | |
737 | kfree_skb(skb); | |
738 | goto free_dst; | |
739 | } | |
740 | ||
abe492b4 | 741 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
8ed66f0e JL |
742 | if (IS_ERR(skb)) { |
743 | err = PTR_ERR(skb); | |
744 | goto free_dst; | |
745 | } | |
746 | ||
747 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
748 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
749 | ||
750 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
751 | return 0; | |
752 | ||
753 | free_dst: | |
754 | dst_release(dst); | |
755 | return err; | |
756 | } | |
757 | #endif | |
758 | ||
759 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
760 | struct net_device *dev, | |
761 | struct flowi4 *fl4, | |
762 | struct ip_tunnel_info *info) | |
e305ac6c PS |
763 | { |
764 | struct geneve_dev *geneve = netdev_priv(dev); | |
468dfffc | 765 | struct dst_cache *dst_cache; |
e305ac6c | 766 | struct rtable *rt = NULL; |
468dfffc | 767 | bool use_cache = true; |
e305ac6c PS |
768 | __u8 tos; |
769 | ||
770 | memset(fl4, 0, sizeof(*fl4)); | |
771 | fl4->flowi4_mark = skb->mark; | |
772 | fl4->flowi4_proto = IPPROTO_UDP; | |
773 | ||
774 | if (info) { | |
775 | fl4->daddr = info->key.u.ipv4.dst; | |
776 | fl4->saddr = info->key.u.ipv4.src; | |
777 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
468dfffc | 778 | dst_cache = &info->dst_cache; |
e305ac6c PS |
779 | } else { |
780 | tos = geneve->tos; | |
781 | if (tos == 1) { | |
782 | const struct iphdr *iip = ip_hdr(skb); | |
783 | ||
784 | tos = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 785 | use_cache = false; |
e305ac6c PS |
786 | } |
787 | ||
788 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 789 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
468dfffc PA |
790 | dst_cache = &geneve->dst_cache; |
791 | } | |
792 | ||
793 | use_cache = use_cache && !skb->mark; | |
794 | if (use_cache) { | |
795 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
796 | if (rt) | |
797 | return rt; | |
e305ac6c PS |
798 | } |
799 | ||
800 | rt = ip_route_output_key(geneve->net, fl4); | |
801 | if (IS_ERR(rt)) { | |
802 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 803 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
804 | } |
805 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
806 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 807 | ip_rt_put(rt); |
fc4099f1 | 808 | return ERR_PTR(-ELOOP); |
e305ac6c | 809 | } |
468dfffc PA |
810 | if (use_cache) |
811 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
812 | return rt; |
813 | } | |
814 | ||
8ed66f0e JL |
815 | #if IS_ENABLED(CONFIG_IPV6) |
816 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
817 | struct net_device *dev, | |
818 | struct flowi6 *fl6, | |
819 | struct ip_tunnel_info *info) | |
820 | { | |
821 | struct geneve_dev *geneve = netdev_priv(dev); | |
822 | struct geneve_sock *gs6 = geneve->sock6; | |
823 | struct dst_entry *dst = NULL; | |
468dfffc PA |
824 | struct dst_cache *dst_cache; |
825 | bool use_cache = true; | |
3a56f86f | 826 | __u8 prio; |
8ed66f0e JL |
827 | |
828 | memset(fl6, 0, sizeof(*fl6)); | |
829 | fl6->flowi6_mark = skb->mark; | |
830 | fl6->flowi6_proto = IPPROTO_UDP; | |
831 | ||
832 | if (info) { | |
833 | fl6->daddr = info->key.u.ipv6.dst; | |
834 | fl6->saddr = info->key.u.ipv6.src; | |
3a56f86f | 835 | fl6->flowi6_tos = RT_TOS(info->key.tos); |
468dfffc | 836 | dst_cache = &info->dst_cache; |
8ed66f0e | 837 | } else { |
3a56f86f JL |
838 | prio = geneve->tos; |
839 | if (prio == 1) { | |
840 | const struct iphdr *iip = ip_hdr(skb); | |
841 | ||
842 | prio = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 843 | use_cache = false; |
3a56f86f JL |
844 | } |
845 | ||
846 | fl6->flowi6_tos = RT_TOS(prio); | |
8ed66f0e | 847 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
468dfffc PA |
848 | dst_cache = &geneve->dst_cache; |
849 | } | |
850 | ||
851 | use_cache = use_cache && !skb->mark; | |
852 | if (use_cache) { | |
853 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
854 | if (dst) | |
855 | return dst; | |
8ed66f0e JL |
856 | } |
857 | ||
858 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
859 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
860 | return ERR_PTR(-ENETUNREACH); | |
861 | } | |
862 | if (dst->dev == dev) { /* is this necessary? */ | |
863 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
864 | dst_release(dst); | |
865 | return ERR_PTR(-ELOOP); | |
866 | } | |
867 | ||
468dfffc PA |
868 | if (use_cache) |
869 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
870 | return dst; |
871 | } | |
872 | #endif | |
873 | ||
e305ac6c PS |
874 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
875 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
876 | { | |
877 | #ifdef __BIG_ENDIAN | |
878 | vni[0] = (__force __u8)(tun_id >> 16); | |
879 | vni[1] = (__force __u8)(tun_id >> 8); | |
880 | vni[2] = (__force __u8)tun_id; | |
881 | #else | |
882 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
883 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
884 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
885 | #endif | |
886 | } | |
887 | ||
8ed66f0e JL |
888 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
889 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
890 | { |
891 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 892 | struct geneve_sock *gs4 = geneve->sock4; |
2d07dc79 | 893 | struct rtable *rt = NULL; |
08399efc | 894 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 895 | int err = -EINVAL; |
2d07dc79 | 896 | struct flowi4 fl4; |
8760ce58 | 897 | __u8 tos, ttl; |
e305ac6c | 898 | __be16 sport; |
371bd106 | 899 | __be16 df; |
8ed66f0e | 900 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 901 | u32 flags = geneve->flags; |
2d07dc79 | 902 | |
e305ac6c | 903 | if (geneve->collect_md) { |
8ed66f0e | 904 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
905 | netdev_dbg(dev, "no tunnel metadata\n"); |
906 | goto tx_error; | |
907 | } | |
7f9562a1 JB |
908 | if (info && ip_tunnel_info_af(info) != AF_INET) |
909 | goto tx_error; | |
e305ac6c | 910 | } |
980c394c | 911 | |
8ed66f0e | 912 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 913 | if (IS_ERR(rt)) { |
fc4099f1 | 914 | err = PTR_ERR(rt); |
2d07dc79 JL |
915 | goto tx_error; |
916 | } | |
371bd106 PS |
917 | |
918 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 919 | skb_reset_mac_header(skb); |
e305ac6c | 920 | |
08399efc JL |
921 | iip = ip_hdr(skb); |
922 | ||
e305ac6c PS |
923 | if (info) { |
924 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
925 | u8 *opts = NULL; |
926 | u8 vni[3]; | |
e305ac6c PS |
927 | |
928 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c | 929 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
4c222798 | 930 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 931 | |
abe492b4 TH |
932 | if (key->tun_flags & TUNNEL_CSUM) |
933 | flags |= GENEVE_F_UDP_CSUM; | |
934 | else | |
935 | flags &= ~GENEVE_F_UDP_CSUM; | |
936 | ||
371bd106 | 937 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 938 | info->options_len, opts, flags, xnet); |
371bd106 PS |
939 | if (unlikely(err)) |
940 | goto err; | |
941 | ||
08399efc | 942 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
943 | ttl = key->ttl; |
944 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 945 | } else { |
371bd106 | 946 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 947 | 0, NULL, flags, xnet); |
371bd106 PS |
948 | if (unlikely(err)) |
949 | goto err; | |
950 | ||
e305ac6c | 951 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
952 | ttl = geneve->ttl; |
953 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
954 | ttl = 1; | |
e305ac6c | 955 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 956 | df = 0; |
2d07dc79 | 957 | } |
039f5062 PS |
958 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
959 | tos, ttl, df, sport, geneve->dst_port, | |
960 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
961 | !(flags & GENEVE_F_UDP_CSUM)); | |
2d07dc79 | 962 | |
2d07dc79 JL |
963 | return NETDEV_TX_OK; |
964 | ||
2d07dc79 | 965 | tx_error: |
2d07dc79 | 966 | dev_kfree_skb(skb); |
371bd106 | 967 | err: |
fc4099f1 PS |
968 | if (err == -ELOOP) |
969 | dev->stats.collisions++; | |
970 | else if (err == -ENETUNREACH) | |
971 | dev->stats.tx_carrier_errors++; | |
972 | else | |
973 | dev->stats.tx_errors++; | |
2d07dc79 JL |
974 | return NETDEV_TX_OK; |
975 | } | |
976 | ||
8ed66f0e JL |
977 | #if IS_ENABLED(CONFIG_IPV6) |
978 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
979 | struct ip_tunnel_info *info) | |
980 | { | |
981 | struct geneve_dev *geneve = netdev_priv(dev); | |
982 | struct geneve_sock *gs6 = geneve->sock6; | |
983 | struct dst_entry *dst = NULL; | |
3a56f86f | 984 | const struct iphdr *iip; /* interior IP header */ |
8ed66f0e JL |
985 | int err = -EINVAL; |
986 | struct flowi6 fl6; | |
3a56f86f | 987 | __u8 prio, ttl; |
8ed66f0e | 988 | __be16 sport; |
8ed66f0e | 989 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 990 | u32 flags = geneve->flags; |
8ed66f0e JL |
991 | |
992 | if (geneve->collect_md) { | |
993 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
994 | netdev_dbg(dev, "no tunnel metadata\n"); | |
995 | goto tx_error; | |
996 | } | |
997 | } | |
998 | ||
999 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1000 | if (IS_ERR(dst)) { | |
1001 | err = PTR_ERR(dst); | |
1002 | goto tx_error; | |
1003 | } | |
1004 | ||
1005 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
1006 | skb_reset_mac_header(skb); | |
1007 | ||
3a56f86f JL |
1008 | iip = ip_hdr(skb); |
1009 | ||
8ed66f0e JL |
1010 | if (info) { |
1011 | const struct ip_tunnel_key *key = &info->key; | |
1012 | u8 *opts = NULL; | |
1013 | u8 vni[3]; | |
1014 | ||
1015 | tunnel_id_to_vni(key->tun_id, vni); | |
1016 | if (key->tun_flags & TUNNEL_GENEVE_OPT) | |
1017 | opts = ip_tunnel_info_opts(info); | |
1018 | ||
abe492b4 | 1019 | if (key->tun_flags & TUNNEL_CSUM) |
35e2d115 | 1020 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1021 | else |
35e2d115 | 1022 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1023 | |
8ed66f0e JL |
1024 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
1025 | info->options_len, opts, | |
abe492b4 | 1026 | flags, xnet); |
8ed66f0e JL |
1027 | if (unlikely(err)) |
1028 | goto err; | |
1029 | ||
3a56f86f | 1030 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e JL |
1031 | ttl = key->ttl; |
1032 | } else { | |
8ed66f0e | 1033 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, |
abe492b4 | 1034 | 0, NULL, flags, xnet); |
8ed66f0e JL |
1035 | if (unlikely(err)) |
1036 | goto err; | |
1037 | ||
3a56f86f | 1038 | prio = ip_tunnel_ecn_encap(fl6.flowi6_tos, iip, skb); |
8ed66f0e JL |
1039 | ttl = geneve->ttl; |
1040 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1041 | ttl = 1; | |
1042 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
1043 | } | |
039f5062 PS |
1044 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
1045 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
1046 | sport, geneve->dst_port, | |
1047 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1048 | return NETDEV_TX_OK; |
1049 | ||
1050 | tx_error: | |
1051 | dev_kfree_skb(skb); | |
1052 | err: | |
1053 | if (err == -ELOOP) | |
1054 | dev->stats.collisions++; | |
1055 | else if (err == -ENETUNREACH) | |
1056 | dev->stats.tx_carrier_errors++; | |
1057 | else | |
1058 | dev->stats.tx_errors++; | |
1059 | return NETDEV_TX_OK; | |
1060 | } | |
1061 | #endif | |
1062 | ||
1063 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1064 | { | |
1065 | struct geneve_dev *geneve = netdev_priv(dev); | |
1066 | struct ip_tunnel_info *info = NULL; | |
1067 | ||
1068 | if (geneve->collect_md) | |
1069 | info = skb_tunnel_info(skb); | |
1070 | ||
1071 | #if IS_ENABLED(CONFIG_IPV6) | |
1072 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1073 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1074 | return geneve6_xmit_skb(skb, dev, info); | |
1075 | #endif | |
1076 | return geneve_xmit_skb(skb, dev, info); | |
1077 | } | |
1078 | ||
fc4099f1 PS |
1079 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1080 | { | |
1081 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1082 | struct geneve_dev *geneve = netdev_priv(dev); | |
1083 | struct rtable *rt; | |
1084 | struct flowi4 fl4; | |
b8812fa8 JL |
1085 | #if IS_ENABLED(CONFIG_IPV6) |
1086 | struct dst_entry *dst; | |
1087 | struct flowi6 fl6; | |
1088 | #endif | |
fc4099f1 | 1089 | |
b8812fa8 JL |
1090 | if (ip_tunnel_info_af(info) == AF_INET) { |
1091 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1092 | if (IS_ERR(rt)) | |
1093 | return PTR_ERR(rt); | |
fc4099f1 | 1094 | |
b8812fa8 JL |
1095 | ip_rt_put(rt); |
1096 | info->key.u.ipv4.src = fl4.saddr; | |
1097 | #if IS_ENABLED(CONFIG_IPV6) | |
1098 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1099 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1100 | if (IS_ERR(dst)) | |
1101 | return PTR_ERR(dst); | |
1102 | ||
1103 | dst_release(dst); | |
1104 | info->key.u.ipv6.src = fl6.saddr; | |
1105 | #endif | |
1106 | } else { | |
1107 | return -EINVAL; | |
1108 | } | |
fc4099f1 | 1109 | |
fc4099f1 PS |
1110 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1111 | 1, USHRT_MAX, true); | |
1112 | info->key.tp_dst = geneve->dst_port; | |
1113 | return 0; | |
1114 | } | |
1115 | ||
2d07dc79 JL |
1116 | static const struct net_device_ops geneve_netdev_ops = { |
1117 | .ndo_init = geneve_init, | |
1118 | .ndo_uninit = geneve_uninit, | |
1119 | .ndo_open = geneve_open, | |
1120 | .ndo_stop = geneve_stop, | |
1121 | .ndo_start_xmit = geneve_xmit, | |
1122 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
1123 | .ndo_change_mtu = eth_change_mtu, | |
1124 | .ndo_validate_addr = eth_validate_addr, | |
1125 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1126 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1127 | }; |
1128 | ||
1129 | static void geneve_get_drvinfo(struct net_device *dev, | |
1130 | struct ethtool_drvinfo *drvinfo) | |
1131 | { | |
1132 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1133 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1134 | } | |
1135 | ||
1136 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1137 | .get_drvinfo = geneve_get_drvinfo, | |
1138 | .get_link = ethtool_op_get_link, | |
1139 | }; | |
1140 | ||
1141 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1142 | static struct device_type geneve_type = { | |
1143 | .name = "geneve", | |
1144 | }; | |
1145 | ||
05ca4029 SA |
1146 | /* Calls the ndo_add_geneve_port of the caller in order to |
1147 | * supply the listening GENEVE udp ports. Callers are expected | |
1148 | * to implement the ndo_add_geneve_port. | |
1149 | */ | |
1150 | void geneve_get_rx_port(struct net_device *dev) | |
1151 | { | |
1152 | struct net *net = dev_net(dev); | |
1153 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1154 | struct geneve_sock *gs; | |
1155 | sa_family_t sa_family; | |
1156 | struct sock *sk; | |
1157 | __be16 port; | |
1158 | ||
1159 | rcu_read_lock(); | |
1160 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { | |
1161 | sk = gs->sock->sk; | |
1162 | sa_family = sk->sk_family; | |
1163 | port = inet_sk(sk)->inet_sport; | |
1164 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, port); | |
1165 | } | |
1166 | rcu_read_unlock(); | |
1167 | } | |
1168 | EXPORT_SYMBOL_GPL(geneve_get_rx_port); | |
1169 | ||
2d07dc79 JL |
1170 | /* Initialize the device structure. */ |
1171 | static void geneve_setup(struct net_device *dev) | |
1172 | { | |
1173 | ether_setup(dev); | |
1174 | ||
1175 | dev->netdev_ops = &geneve_netdev_ops; | |
1176 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1177 | dev->destructor = free_netdev; | |
1178 | ||
1179 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1180 | ||
2d07dc79 JL |
1181 | dev->features |= NETIF_F_LLTX; |
1182 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1183 | dev->features |= NETIF_F_RXCSUM; | |
1184 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1185 | ||
2d07dc79 JL |
1186 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1187 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1188 | |
1189 | netif_keep_dst(dev); | |
ed961ac2 | 1190 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1191 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1192 | } |
1193 | ||
1194 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1195 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1196 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1197 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1198 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1199 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 1200 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1201 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1202 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1203 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1204 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1205 | }; |
1206 | ||
1207 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1208 | { | |
1209 | if (tb[IFLA_ADDRESS]) { | |
1210 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1211 | return -EINVAL; | |
1212 | ||
1213 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1214 | return -EADDRNOTAVAIL; | |
1215 | } | |
1216 | ||
1217 | if (!data) | |
1218 | return -EINVAL; | |
1219 | ||
1220 | if (data[IFLA_GENEVE_ID]) { | |
1221 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1222 | ||
1223 | if (vni >= GENEVE_VID_MASK) | |
1224 | return -ERANGE; | |
1225 | } | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
371bd106 PS |
1230 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1231 | __be16 dst_port, | |
8ed66f0e | 1232 | union geneve_addr *remote, |
371bd106 PS |
1233 | u8 vni[], |
1234 | bool *tun_on_same_port, | |
1235 | bool *tun_collect_md) | |
1236 | { | |
1237 | struct geneve_dev *geneve, *t; | |
1238 | ||
1239 | *tun_on_same_port = false; | |
1240 | *tun_collect_md = false; | |
1241 | t = NULL; | |
1242 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1243 | if (geneve->dst_port == dst_port) { | |
1244 | *tun_collect_md = geneve->collect_md; | |
1245 | *tun_on_same_port = true; | |
1246 | } | |
1247 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1248 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1249 | dst_port == geneve->dst_port) |
1250 | t = geneve; | |
1251 | } | |
1252 | return t; | |
1253 | } | |
1254 | ||
e305ac6c | 1255 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e JL |
1256 | union geneve_addr *remote, |
1257 | __u32 vni, __u8 ttl, __u8 tos, __be16 dst_port, | |
abe492b4 | 1258 | bool metadata, u32 flags) |
2d07dc79 JL |
1259 | { |
1260 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1261 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1262 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1263 | int err, encap_len; |
2d07dc79 | 1264 | |
8ed66f0e JL |
1265 | if (!remote) |
1266 | return -EINVAL; | |
1267 | if (metadata && | |
1268 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl)) | |
1269 | return -EINVAL; | |
2d07dc79 JL |
1270 | |
1271 | geneve->net = net; | |
1272 | geneve->dev = dev; | |
1273 | ||
2d07dc79 JL |
1274 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1275 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1276 | geneve->vni[2] = vni & 0x000000ff; | |
1277 | ||
8ed66f0e JL |
1278 | if ((remote->sa.sa_family == AF_INET && |
1279 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1280 | (remote->sa.sa_family == AF_INET6 && | |
1281 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1282 | return -EINVAL; |
8ed66f0e | 1283 | geneve->remote = *remote; |
2d07dc79 | 1284 | |
e305ac6c PS |
1285 | geneve->ttl = ttl; |
1286 | geneve->tos = tos; | |
7bbe33ff | 1287 | geneve->dst_port = dst_port; |
e305ac6c | 1288 | geneve->collect_md = metadata; |
abe492b4 | 1289 | geneve->flags = flags; |
e305ac6c | 1290 | |
8ed66f0e | 1291 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1292 | &tun_on_same_port, &tun_collect_md); |
1293 | if (t) | |
1294 | return -EBUSY; | |
1295 | ||
184fc8b5 PA |
1296 | /* make enough headroom for basic scenario */ |
1297 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1298 | if (remote->sa.sa_family == AF_INET) | |
1299 | encap_len += sizeof(struct iphdr); | |
1300 | else | |
1301 | encap_len += sizeof(struct ipv6hdr); | |
1302 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1303 | ||
371bd106 PS |
1304 | if (metadata) { |
1305 | if (tun_on_same_port) | |
1306 | return -EPERM; | |
1307 | } else { | |
1308 | if (tun_collect_md) | |
1309 | return -EPERM; | |
1310 | } | |
1311 | ||
468dfffc PA |
1312 | dst_cache_reset(&geneve->dst_cache); |
1313 | ||
2d07dc79 JL |
1314 | err = register_netdevice(dev); |
1315 | if (err) | |
1316 | return err; | |
1317 | ||
e305ac6c | 1318 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1319 | return 0; |
1320 | } | |
1321 | ||
1322 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1323 | struct nlattr *tb[], struct nlattr *data[]) | |
1324 | { | |
7bbe33ff | 1325 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1326 | __u8 ttl = 0, tos = 0; |
1327 | bool metadata = false; | |
8ed66f0e | 1328 | union geneve_addr remote = geneve_remote_unspec; |
e277de5f | 1329 | __u32 vni = 0; |
abe492b4 | 1330 | u32 flags = 0; |
e305ac6c | 1331 | |
8ed66f0e JL |
1332 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1333 | return -EINVAL; | |
1334 | ||
1335 | if (data[IFLA_GENEVE_REMOTE]) { | |
1336 | remote.sa.sa_family = AF_INET; | |
1337 | remote.sin.sin_addr.s_addr = | |
1338 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1339 | } | |
1340 | ||
1341 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1342 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1343 | return -EPFNOSUPPORT; | |
1344 | ||
1345 | remote.sa.sa_family = AF_INET6; | |
1346 | remote.sin6.sin6_addr = | |
1347 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1348 | ||
1349 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1350 | IPV6_ADDR_LINKLOCAL) { | |
1351 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1352 | return -EINVAL; | |
1353 | } | |
1354 | } | |
1355 | ||
e277de5f JG |
1356 | if (data[IFLA_GENEVE_ID]) |
1357 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1358 | |
8760ce58 | 1359 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1360 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1361 | |
d8951125 | 1362 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1363 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1364 | |
e305ac6c | 1365 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1366 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1367 | |
e305ac6c PS |
1368 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1369 | metadata = true; | |
2d07dc79 | 1370 | |
abe492b4 TH |
1371 | if (data[IFLA_GENEVE_UDP_CSUM] && |
1372 | nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) | |
1373 | flags |= GENEVE_F_UDP_CSUM; | |
1374 | ||
1375 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1376 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1377 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1378 | ||
1379 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1380 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1381 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1382 | ||
8ed66f0e | 1383 | return geneve_configure(net, dev, &remote, vni, ttl, tos, dst_port, |
abe492b4 | 1384 | metadata, flags); |
2d07dc79 JL |
1385 | } |
1386 | ||
1387 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1388 | { | |
1389 | struct geneve_dev *geneve = netdev_priv(dev); | |
1390 | ||
2d07dc79 JL |
1391 | list_del(&geneve->next); |
1392 | unregister_netdevice_queue(dev, head); | |
1393 | } | |
1394 | ||
1395 | static size_t geneve_get_size(const struct net_device *dev) | |
1396 | { | |
1397 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1398 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1399 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1400 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
7bbe33ff | 1401 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1402 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1403 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1404 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1405 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1406 | 0; |
1407 | } | |
1408 | ||
1409 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1410 | { | |
1411 | struct geneve_dev *geneve = netdev_priv(dev); | |
1412 | __u32 vni; | |
1413 | ||
1414 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1415 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1416 | goto nla_put_failure; | |
1417 | ||
8ed66f0e JL |
1418 | if (geneve->remote.sa.sa_family == AF_INET) { |
1419 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1420 | geneve->remote.sin.sin_addr.s_addr)) | |
1421 | goto nla_put_failure; | |
1422 | #if IS_ENABLED(CONFIG_IPV6) | |
1423 | } else { | |
1424 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1425 | &geneve->remote.sin6.sin6_addr)) | |
1426 | goto nla_put_failure; | |
1427 | #endif | |
1428 | } | |
2d07dc79 | 1429 | |
d8951125 JL |
1430 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
1431 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
1432 | goto nla_put_failure; |
1433 | ||
7bbe33ff | 1434 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1435 | goto nla_put_failure; |
1436 | ||
e305ac6c PS |
1437 | if (geneve->collect_md) { |
1438 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1439 | goto nla_put_failure; | |
1440 | } | |
1441 | ||
abe492b4 TH |
1442 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1443 | !!(geneve->flags & GENEVE_F_UDP_CSUM)) || | |
1444 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1445 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1446 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1447 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1448 | goto nla_put_failure; | |
1449 | ||
2d07dc79 JL |
1450 | return 0; |
1451 | ||
1452 | nla_put_failure: | |
1453 | return -EMSGSIZE; | |
1454 | } | |
1455 | ||
1456 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1457 | .kind = "geneve", | |
1458 | .maxtype = IFLA_GENEVE_MAX, | |
1459 | .policy = geneve_policy, | |
1460 | .priv_size = sizeof(struct geneve_dev), | |
1461 | .setup = geneve_setup, | |
1462 | .validate = geneve_validate, | |
1463 | .newlink = geneve_newlink, | |
1464 | .dellink = geneve_dellink, | |
1465 | .get_size = geneve_get_size, | |
1466 | .fill_info = geneve_fill_info, | |
1467 | }; | |
1468 | ||
e305ac6c PS |
1469 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1470 | u8 name_assign_type, u16 dst_port) | |
1471 | { | |
1472 | struct nlattr *tb[IFLA_MAX + 1]; | |
1473 | struct net_device *dev; | |
1474 | int err; | |
1475 | ||
1476 | memset(tb, 0, sizeof(tb)); | |
1477 | dev = rtnl_create_link(net, name, name_assign_type, | |
1478 | &geneve_link_ops, tb); | |
1479 | if (IS_ERR(dev)) | |
1480 | return dev; | |
1481 | ||
8ed66f0e | 1482 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
abe492b4 | 1483 | 0, 0, 0, htons(dst_port), true, 0); |
e305ac6c PS |
1484 | if (err) { |
1485 | free_netdev(dev); | |
1486 | return ERR_PTR(err); | |
1487 | } | |
1488 | return dev; | |
1489 | } | |
1490 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1491 | ||
2d07dc79 JL |
1492 | static __net_init int geneve_init_net(struct net *net) |
1493 | { | |
1494 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1495 | |
1496 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1497 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1498 | return 0; |
1499 | } | |
1500 | ||
1501 | static void __net_exit geneve_exit_net(struct net *net) | |
1502 | { | |
1503 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1504 | struct geneve_dev *geneve, *next; | |
1505 | struct net_device *dev, *aux; | |
1506 | LIST_HEAD(list); | |
1507 | ||
1508 | rtnl_lock(); | |
1509 | ||
1510 | /* gather any geneve devices that were moved into this ns */ | |
1511 | for_each_netdev_safe(net, dev, aux) | |
1512 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1513 | unregister_netdevice_queue(dev, &list); | |
1514 | ||
1515 | /* now gather any other geneve devices that were created in this ns */ | |
1516 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1517 | /* If geneve->dev is in the same netns, it was already added | |
1518 | * to the list by the previous loop. | |
1519 | */ | |
1520 | if (!net_eq(dev_net(geneve->dev), net)) | |
1521 | unregister_netdevice_queue(geneve->dev, &list); | |
1522 | } | |
1523 | ||
1524 | /* unregister the devices gathered above */ | |
1525 | unregister_netdevice_many(&list); | |
1526 | rtnl_unlock(); | |
1527 | } | |
1528 | ||
1529 | static struct pernet_operations geneve_net_ops = { | |
1530 | .init = geneve_init_net, | |
1531 | .exit = geneve_exit_net, | |
1532 | .id = &geneve_net_id, | |
1533 | .size = sizeof(struct geneve_net), | |
1534 | }; | |
1535 | ||
1536 | static int __init geneve_init_module(void) | |
1537 | { | |
1538 | int rc; | |
1539 | ||
1540 | rc = register_pernet_subsys(&geneve_net_ops); | |
1541 | if (rc) | |
1542 | goto out1; | |
1543 | ||
1544 | rc = rtnl_link_register(&geneve_link_ops); | |
1545 | if (rc) | |
1546 | goto out2; | |
1547 | ||
1548 | return 0; | |
1549 | out2: | |
1550 | unregister_pernet_subsys(&geneve_net_ops); | |
1551 | out1: | |
1552 | return rc; | |
1553 | } | |
1554 | late_initcall(geneve_init_module); | |
1555 | ||
1556 | static void __exit geneve_cleanup_module(void) | |
1557 | { | |
1558 | rtnl_link_unregister(&geneve_link_ops); | |
1559 | unregister_pernet_subsys(&geneve_net_ops); | |
1560 | } | |
1561 | module_exit(geneve_cleanup_module); | |
1562 | ||
1563 | MODULE_LICENSE("GPL"); | |
1564 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1565 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1566 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1567 | MODULE_ALIAS_RTNL_LINK("geneve"); |