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 | ||
1e9f12ec JB |
113 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
114 | { | |
115 | return gs->sock->sk->sk_family; | |
116 | } | |
117 | ||
66d47003 | 118 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 119 | __be32 addr, u8 vni[]) |
2d07dc79 | 120 | { |
2d07dc79 | 121 | struct hlist_head *vni_list_head; |
e305ac6c | 122 | struct geneve_dev *geneve; |
2d07dc79 JL |
123 | __u32 hash; |
124 | ||
2d07dc79 | 125 | /* Find the device for this VNI */ |
371bd106 | 126 | hash = geneve_net_vni_hash(vni); |
66d47003 | 127 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 128 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 129 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
8ed66f0e JL |
130 | addr == geneve->remote.sin.sin_addr.s_addr) |
131 | return geneve; | |
132 | } | |
133 | return NULL; | |
134 | } | |
135 | ||
136 | #if IS_ENABLED(CONFIG_IPV6) | |
137 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
138 | struct in6_addr addr6, u8 vni[]) | |
139 | { | |
140 | struct hlist_head *vni_list_head; | |
141 | struct geneve_dev *geneve; | |
142 | __u32 hash; | |
143 | ||
144 | /* Find the device for this VNI */ | |
145 | hash = geneve_net_vni_hash(vni); | |
146 | vni_list_head = &gs->vni_list[hash]; | |
147 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
148 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
149 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e305ac6c | 150 | return geneve; |
2d07dc79 | 151 | } |
e305ac6c PS |
152 | return NULL; |
153 | } | |
8ed66f0e | 154 | #endif |
e305ac6c | 155 | |
371bd106 PS |
156 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
157 | { | |
158 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
159 | } | |
160 | ||
9fc47545 JB |
161 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
162 | struct sk_buff *skb) | |
e305ac6c | 163 | { |
9fc47545 | 164 | u8 *vni; |
371bd106 | 165 | __be32 addr; |
8ed66f0e | 166 | static u8 zero_vni[3]; |
8ed66f0e | 167 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
168 | static struct in6_addr zero_addr6; |
169 | #endif | |
e305ac6c | 170 | |
1e9f12ec | 171 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 JB |
172 | struct iphdr *iph; |
173 | ||
8ed66f0e | 174 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 175 | |
8ed66f0e JL |
176 | if (gs->collect_md) { |
177 | vni = zero_vni; | |
178 | addr = 0; | |
179 | } else { | |
9fc47545 | 180 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
181 | addr = iph->saddr; |
182 | } | |
183 | ||
9fc47545 | 184 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 185 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 186 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9fc47545 JB |
187 | struct ipv6hdr *ip6h; |
188 | struct in6_addr addr6; | |
189 | ||
8ed66f0e | 190 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 191 | |
8ed66f0e JL |
192 | if (gs->collect_md) { |
193 | vni = zero_vni; | |
194 | addr6 = zero_addr6; | |
195 | } else { | |
9fc47545 | 196 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
197 | addr6 = ip6h->saddr; |
198 | } | |
199 | ||
9fc47545 | 200 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
201 | #endif |
202 | } | |
9fc47545 JB |
203 | return NULL; |
204 | } | |
205 | ||
206 | /* geneve receive/decap routine */ | |
207 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
208 | struct sk_buff *skb) | |
209 | { | |
210 | struct genevehdr *gnvh = geneve_hdr(skb); | |
211 | struct metadata_dst *tun_dst = NULL; | |
212 | struct pcpu_sw_netstats *stats; | |
213 | int err = 0; | |
214 | void *oiph; | |
2d07dc79 | 215 | |
371bd106 | 216 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 217 | __be16 flags; |
e305ac6c PS |
218 | |
219 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
220 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
221 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
222 | ||
1e9f12ec | 223 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
224 | vni_to_tunnel_id(gnvh->vni), |
225 | gnvh->opt_len * 4); | |
226 | if (!tun_dst) | |
227 | goto drop; | |
e305ac6c | 228 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
229 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
230 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
231 | } else { |
232 | /* Drop packets w/ critical options, | |
233 | * since we don't support any... | |
234 | */ | |
235 | if (gnvh->critical) | |
236 | goto drop; | |
237 | } | |
2d07dc79 JL |
238 | |
239 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
240 | skb->protocol = eth_type_trans(skb, geneve->dev); |
241 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
242 | ||
e305ac6c PS |
243 | if (tun_dst) |
244 | skb_dst_set(skb, &tun_dst->dst); | |
245 | ||
2d07dc79 JL |
246 | /* Ignore packet loops (and multicast echo) */ |
247 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
248 | goto drop; | |
249 | ||
9fc47545 | 250 | oiph = skb_network_header(skb); |
2d07dc79 JL |
251 | skb_reset_network_header(skb); |
252 | ||
9fc47545 JB |
253 | if (geneve_get_sk_family(gs) == AF_INET) |
254 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 255 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
256 | else |
257 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 258 | #endif |
2d07dc79 JL |
259 | |
260 | if (unlikely(err)) { | |
8ed66f0e | 261 | if (log_ecn_error) { |
9fc47545 | 262 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
263 | net_info_ratelimited("non-ECT from %pI4 " |
264 | "with TOS=%#x\n", | |
9fc47545 JB |
265 | &((struct iphdr *)oiph)->saddr, |
266 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 267 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 268 | else |
8ed66f0e | 269 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 270 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
271 | #endif |
272 | } | |
2d07dc79 JL |
273 | if (err > 1) { |
274 | ++geneve->dev->stats.rx_frame_errors; | |
275 | ++geneve->dev->stats.rx_errors; | |
276 | goto drop; | |
277 | } | |
278 | } | |
279 | ||
280 | stats = this_cpu_ptr(geneve->dev->tstats); | |
281 | u64_stats_update_begin(&stats->syncp); | |
282 | stats->rx_packets++; | |
283 | stats->rx_bytes += skb->len; | |
284 | u64_stats_update_end(&stats->syncp); | |
285 | ||
8e816df8 | 286 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
287 | return; |
288 | drop: | |
289 | /* Consume bad packet */ | |
290 | kfree_skb(skb); | |
291 | } | |
292 | ||
293 | /* Setup stats when device is created */ | |
294 | static int geneve_init(struct net_device *dev) | |
295 | { | |
8e816df8 JG |
296 | struct geneve_dev *geneve = netdev_priv(dev); |
297 | int err; | |
298 | ||
2d07dc79 JL |
299 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
300 | if (!dev->tstats) | |
301 | return -ENOMEM; | |
8e816df8 JG |
302 | |
303 | err = gro_cells_init(&geneve->gro_cells, dev); | |
304 | if (err) { | |
305 | free_percpu(dev->tstats); | |
306 | return err; | |
307 | } | |
308 | ||
468dfffc PA |
309 | err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL); |
310 | if (err) { | |
311 | free_percpu(dev->tstats); | |
312 | gro_cells_destroy(&geneve->gro_cells); | |
313 | return err; | |
314 | } | |
315 | ||
2d07dc79 JL |
316 | return 0; |
317 | } | |
318 | ||
319 | static void geneve_uninit(struct net_device *dev) | |
320 | { | |
8e816df8 JG |
321 | struct geneve_dev *geneve = netdev_priv(dev); |
322 | ||
468dfffc | 323 | dst_cache_destroy(&geneve->dst_cache); |
8e816df8 | 324 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
325 | free_percpu(dev->tstats); |
326 | } | |
327 | ||
371bd106 PS |
328 | /* Callback from net/ipv4/udp.c to receive packets */ |
329 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
330 | { | |
331 | struct genevehdr *geneveh; | |
9fc47545 | 332 | struct geneve_dev *geneve; |
371bd106 PS |
333 | struct geneve_sock *gs; |
334 | int opts_len; | |
335 | ||
336 | /* Need Geneve and inner Ethernet header to be present */ | |
337 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
338 | goto error; | |
339 | ||
340 | /* Return packets with reserved bits set */ | |
341 | geneveh = geneve_hdr(skb); | |
342 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
343 | goto error; | |
344 | ||
345 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
346 | goto error; | |
347 | ||
9fc47545 JB |
348 | gs = rcu_dereference_sk_user_data(sk); |
349 | if (!gs) | |
350 | goto drop; | |
351 | ||
352 | geneve = geneve_lookup_skb(gs, skb); | |
353 | if (!geneve) | |
354 | goto drop; | |
355 | ||
371bd106 PS |
356 | opts_len = geneveh->opt_len * 4; |
357 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 JB |
358 | htons(ETH_P_TEB), |
359 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
371bd106 PS |
360 | goto drop; |
361 | ||
9fc47545 | 362 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
363 | return 0; |
364 | ||
365 | drop: | |
366 | /* Consume bad packet */ | |
367 | kfree_skb(skb); | |
368 | return 0; | |
369 | ||
370 | error: | |
371 | /* Let the UDP layer deal with the skb */ | |
372 | return 1; | |
373 | } | |
374 | ||
375 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
abe492b4 | 376 | __be16 port, u32 flags) |
371bd106 PS |
377 | { |
378 | struct socket *sock; | |
379 | struct udp_port_cfg udp_conf; | |
380 | int err; | |
381 | ||
382 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
383 | ||
384 | if (ipv6) { | |
385 | udp_conf.family = AF_INET6; | |
8ed66f0e | 386 | udp_conf.ipv6_v6only = 1; |
abe492b4 TH |
387 | udp_conf.use_udp6_rx_checksums = |
388 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
371bd106 PS |
389 | } else { |
390 | udp_conf.family = AF_INET; | |
391 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
392 | } | |
393 | ||
394 | udp_conf.local_udp_port = port; | |
395 | ||
396 | /* Open UDP socket */ | |
397 | err = udp_sock_create(net, &udp_conf, &sock); | |
398 | if (err < 0) | |
399 | return ERR_PTR(err); | |
400 | ||
401 | return sock; | |
402 | } | |
403 | ||
404 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
405 | { | |
a8170d2b | 406 | struct net_device *dev; |
371bd106 | 407 | struct sock *sk = gs->sock->sk; |
a8170d2b | 408 | struct net *net = sock_net(sk); |
1e9f12ec | 409 | sa_family_t sa_family = geneve_get_sk_family(gs); |
a8170d2b | 410 | __be16 port = inet_sk(sk)->inet_sport; |
371bd106 PS |
411 | int err; |
412 | ||
413 | if (sa_family == AF_INET) { | |
787d7ac3 | 414 | err = udp_add_offload(sock_net(sk), &gs->udp_offloads); |
371bd106 PS |
415 | if (err) |
416 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
417 | err); | |
418 | } | |
a8170d2b SA |
419 | |
420 | rcu_read_lock(); | |
421 | for_each_netdev_rcu(net, dev) { | |
422 | if (dev->netdev_ops->ndo_add_geneve_port) | |
423 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, | |
424 | port); | |
425 | } | |
426 | rcu_read_unlock(); | |
371bd106 PS |
427 | } |
428 | ||
429 | static int geneve_hlen(struct genevehdr *gh) | |
430 | { | |
431 | return sizeof(*gh) + gh->opt_len * 4; | |
432 | } | |
433 | ||
434 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
435 | struct sk_buff *skb, | |
436 | struct udp_offload *uoff) | |
437 | { | |
438 | struct sk_buff *p, **pp = NULL; | |
439 | struct genevehdr *gh, *gh2; | |
440 | unsigned int hlen, gh_len, off_gnv; | |
441 | const struct packet_offload *ptype; | |
442 | __be16 type; | |
443 | int flush = 1; | |
444 | ||
445 | off_gnv = skb_gro_offset(skb); | |
446 | hlen = off_gnv + sizeof(*gh); | |
447 | gh = skb_gro_header_fast(skb, off_gnv); | |
448 | if (skb_gro_header_hard(skb, hlen)) { | |
449 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
450 | if (unlikely(!gh)) | |
451 | goto out; | |
452 | } | |
453 | ||
454 | if (gh->ver != GENEVE_VER || gh->oam) | |
455 | goto out; | |
456 | gh_len = geneve_hlen(gh); | |
457 | ||
458 | hlen = off_gnv + gh_len; | |
459 | if (skb_gro_header_hard(skb, hlen)) { | |
460 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
461 | if (unlikely(!gh)) | |
462 | goto out; | |
463 | } | |
464 | ||
465 | flush = 0; | |
466 | ||
467 | for (p = *head; p; p = p->next) { | |
468 | if (!NAPI_GRO_CB(p)->same_flow) | |
469 | continue; | |
470 | ||
471 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
472 | if (gh->opt_len != gh2->opt_len || | |
473 | memcmp(gh, gh2, gh_len)) { | |
474 | NAPI_GRO_CB(p)->same_flow = 0; | |
475 | continue; | |
476 | } | |
477 | } | |
478 | ||
479 | type = gh->proto_type; | |
480 | ||
481 | rcu_read_lock(); | |
482 | ptype = gro_find_receive_by_type(type); | |
483 | if (!ptype) { | |
484 | flush = 1; | |
485 | goto out_unlock; | |
486 | } | |
487 | ||
488 | skb_gro_pull(skb, gh_len); | |
489 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
490 | pp = ptype->callbacks.gro_receive(head, skb); | |
491 | ||
492 | out_unlock: | |
493 | rcu_read_unlock(); | |
494 | out: | |
495 | NAPI_GRO_CB(skb)->flush |= flush; | |
496 | ||
497 | return pp; | |
498 | } | |
499 | ||
500 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
501 | struct udp_offload *uoff) | |
502 | { | |
503 | struct genevehdr *gh; | |
504 | struct packet_offload *ptype; | |
505 | __be16 type; | |
506 | int gh_len; | |
507 | int err = -ENOSYS; | |
508 | ||
509 | udp_tunnel_gro_complete(skb, nhoff); | |
510 | ||
511 | gh = (struct genevehdr *)(skb->data + nhoff); | |
512 | gh_len = geneve_hlen(gh); | |
513 | type = gh->proto_type; | |
514 | ||
515 | rcu_read_lock(); | |
516 | ptype = gro_find_complete_by_type(type); | |
517 | if (ptype) | |
518 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
519 | ||
520 | rcu_read_unlock(); | |
521 | return err; | |
522 | } | |
523 | ||
524 | /* Create new listen socket if needed */ | |
525 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
abe492b4 | 526 | bool ipv6, u32 flags) |
371bd106 PS |
527 | { |
528 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
529 | struct geneve_sock *gs; | |
530 | struct socket *sock; | |
531 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 532 | int h; |
371bd106 PS |
533 | |
534 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
535 | if (!gs) | |
536 | return ERR_PTR(-ENOMEM); | |
537 | ||
abe492b4 | 538 | sock = geneve_create_sock(net, ipv6, port, flags); |
371bd106 PS |
539 | if (IS_ERR(sock)) { |
540 | kfree(gs); | |
541 | return ERR_CAST(sock); | |
542 | } | |
543 | ||
544 | gs->sock = sock; | |
545 | gs->refcnt = 1; | |
66d47003 PS |
546 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
547 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
548 | |
549 | /* Initialize the geneve udp offloads structure */ | |
550 | gs->udp_offloads.port = port; | |
551 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
552 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
553 | geneve_notify_add_rx_port(gs); | |
554 | ||
555 | /* Mark socket as an encapsulation socket */ | |
556 | tunnel_cfg.sk_user_data = gs; | |
557 | tunnel_cfg.encap_type = 1; | |
558 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
559 | tunnel_cfg.encap_destroy = NULL; | |
560 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
561 | list_add(&gs->list, &gn->sock_list); |
562 | return gs; | |
563 | } | |
564 | ||
565 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
566 | { | |
a8170d2b | 567 | struct net_device *dev; |
371bd106 | 568 | struct sock *sk = gs->sock->sk; |
a8170d2b | 569 | struct net *net = sock_net(sk); |
1e9f12ec | 570 | sa_family_t sa_family = geneve_get_sk_family(gs); |
a8170d2b SA |
571 | __be16 port = inet_sk(sk)->inet_sport; |
572 | ||
573 | rcu_read_lock(); | |
574 | for_each_netdev_rcu(net, dev) { | |
575 | if (dev->netdev_ops->ndo_del_geneve_port) | |
576 | dev->netdev_ops->ndo_del_geneve_port(dev, sa_family, | |
577 | port); | |
578 | } | |
579 | ||
580 | rcu_read_unlock(); | |
371bd106 PS |
581 | |
582 | if (sa_family == AF_INET) | |
583 | udp_del_offload(&gs->udp_offloads); | |
584 | } | |
585 | ||
8ed66f0e | 586 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 587 | { |
8ed66f0e | 588 | if (!gs || --gs->refcnt) |
371bd106 PS |
589 | return; |
590 | ||
591 | list_del(&gs->list); | |
592 | geneve_notify_del_rx_port(gs); | |
593 | udp_tunnel_sock_release(gs->sock); | |
594 | kfree_rcu(gs, rcu); | |
595 | } | |
596 | ||
8ed66f0e JL |
597 | static void geneve_sock_release(struct geneve_dev *geneve) |
598 | { | |
599 | __geneve_sock_release(geneve->sock4); | |
600 | #if IS_ENABLED(CONFIG_IPV6) | |
601 | __geneve_sock_release(geneve->sock6); | |
602 | #endif | |
603 | } | |
604 | ||
371bd106 | 605 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 606 | sa_family_t family, |
371bd106 PS |
607 | __be16 dst_port) |
608 | { | |
609 | struct geneve_sock *gs; | |
610 | ||
611 | list_for_each_entry(gs, &gn->sock_list, list) { | |
612 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 613 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
614 | return gs; |
615 | } | |
616 | } | |
617 | return NULL; | |
618 | } | |
619 | ||
8ed66f0e | 620 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 621 | { |
2d07dc79 | 622 | struct net *net = geneve->net; |
371bd106 | 623 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 624 | struct geneve_sock *gs; |
66d47003 | 625 | __u32 hash; |
2d07dc79 | 626 | |
8ed66f0e | 627 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
628 | if (gs) { |
629 | gs->refcnt++; | |
630 | goto out; | |
631 | } | |
632 | ||
abe492b4 | 633 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
634 | if (IS_ERR(gs)) |
635 | return PTR_ERR(gs); | |
636 | ||
371bd106 PS |
637 | out: |
638 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 639 | gs->flags = geneve->flags; |
8ed66f0e JL |
640 | #if IS_ENABLED(CONFIG_IPV6) |
641 | if (ipv6) | |
642 | geneve->sock6 = gs; | |
643 | else | |
644 | #endif | |
645 | geneve->sock4 = gs; | |
66d47003 PS |
646 | |
647 | hash = geneve_net_vni_hash(geneve->vni); | |
648 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
649 | return 0; |
650 | } | |
651 | ||
8ed66f0e JL |
652 | static int geneve_open(struct net_device *dev) |
653 | { | |
654 | struct geneve_dev *geneve = netdev_priv(dev); | |
655 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
656 | bool metadata = geneve->collect_md; | |
657 | int ret = 0; | |
658 | ||
659 | geneve->sock4 = NULL; | |
660 | #if IS_ENABLED(CONFIG_IPV6) | |
661 | geneve->sock6 = NULL; | |
662 | if (ipv6 || metadata) | |
663 | ret = geneve_sock_add(geneve, true); | |
664 | #endif | |
665 | if (!ret && (!ipv6 || metadata)) | |
666 | ret = geneve_sock_add(geneve, false); | |
667 | if (ret < 0) | |
668 | geneve_sock_release(geneve); | |
669 | ||
670 | return ret; | |
671 | } | |
672 | ||
2d07dc79 JL |
673 | static int geneve_stop(struct net_device *dev) |
674 | { | |
675 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 676 | |
66d47003 PS |
677 | if (!hlist_unhashed(&geneve->hlist)) |
678 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 679 | geneve_sock_release(geneve); |
371bd106 PS |
680 | return 0; |
681 | } | |
682 | ||
8ed66f0e JL |
683 | static void geneve_build_header(struct genevehdr *geneveh, |
684 | __be16 tun_flags, u8 vni[3], | |
685 | u8 options_len, u8 *options) | |
686 | { | |
687 | geneveh->ver = GENEVE_VER; | |
688 | geneveh->opt_len = options_len / 4; | |
689 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
690 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
691 | geneveh->rsvd1 = 0; | |
692 | memcpy(geneveh->vni, vni, 3); | |
693 | geneveh->proto_type = htons(ETH_P_TEB); | |
694 | geneveh->rsvd2 = 0; | |
695 | ||
696 | memcpy(geneveh->options, options, options_len); | |
697 | } | |
698 | ||
371bd106 PS |
699 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
700 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 701 | u32 flags, bool xnet) |
371bd106 PS |
702 | { |
703 | struct genevehdr *gnvh; | |
704 | int min_headroom; | |
705 | int err; | |
abe492b4 | 706 | bool udp_sum = !!(flags & GENEVE_F_UDP_CSUM); |
2d07dc79 | 707 | |
8ed66f0e JL |
708 | skb_scrub_packet(skb, xnet); |
709 | ||
371bd106 PS |
710 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
711 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
712 | err = skb_cow_head(skb, min_headroom); | |
713 | if (unlikely(err)) { | |
714 | kfree_skb(skb); | |
715 | goto free_rt; | |
716 | } | |
717 | ||
abe492b4 | 718 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
371bd106 PS |
719 | if (IS_ERR(skb)) { |
720 | err = PTR_ERR(skb); | |
721 | goto free_rt; | |
722 | } | |
723 | ||
724 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 725 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
726 | |
727 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 728 | return 0; |
371bd106 PS |
729 | |
730 | free_rt: | |
731 | ip_rt_put(rt); | |
732 | return err; | |
2d07dc79 JL |
733 | } |
734 | ||
8ed66f0e JL |
735 | #if IS_ENABLED(CONFIG_IPV6) |
736 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
737 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 738 | u32 flags, bool xnet) |
8ed66f0e JL |
739 | { |
740 | struct genevehdr *gnvh; | |
741 | int min_headroom; | |
742 | int err; | |
abe492b4 | 743 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
744 | |
745 | skb_scrub_packet(skb, xnet); | |
746 | ||
747 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
748 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
749 | err = skb_cow_head(skb, min_headroom); | |
750 | if (unlikely(err)) { | |
751 | kfree_skb(skb); | |
752 | goto free_dst; | |
753 | } | |
754 | ||
abe492b4 | 755 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
8ed66f0e JL |
756 | if (IS_ERR(skb)) { |
757 | err = PTR_ERR(skb); | |
758 | goto free_dst; | |
759 | } | |
760 | ||
761 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
762 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
763 | ||
764 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
765 | return 0; | |
766 | ||
767 | free_dst: | |
768 | dst_release(dst); | |
769 | return err; | |
770 | } | |
771 | #endif | |
772 | ||
773 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
774 | struct net_device *dev, | |
775 | struct flowi4 *fl4, | |
776 | struct ip_tunnel_info *info) | |
e305ac6c PS |
777 | { |
778 | struct geneve_dev *geneve = netdev_priv(dev); | |
468dfffc | 779 | struct dst_cache *dst_cache; |
e305ac6c | 780 | struct rtable *rt = NULL; |
468dfffc | 781 | bool use_cache = true; |
e305ac6c PS |
782 | __u8 tos; |
783 | ||
784 | memset(fl4, 0, sizeof(*fl4)); | |
785 | fl4->flowi4_mark = skb->mark; | |
786 | fl4->flowi4_proto = IPPROTO_UDP; | |
787 | ||
788 | if (info) { | |
789 | fl4->daddr = info->key.u.ipv4.dst; | |
790 | fl4->saddr = info->key.u.ipv4.src; | |
791 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
468dfffc | 792 | dst_cache = &info->dst_cache; |
e305ac6c PS |
793 | } else { |
794 | tos = geneve->tos; | |
795 | if (tos == 1) { | |
796 | const struct iphdr *iip = ip_hdr(skb); | |
797 | ||
798 | tos = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 799 | use_cache = false; |
e305ac6c PS |
800 | } |
801 | ||
802 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 803 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
468dfffc PA |
804 | dst_cache = &geneve->dst_cache; |
805 | } | |
806 | ||
807 | use_cache = use_cache && !skb->mark; | |
808 | if (use_cache) { | |
809 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
810 | if (rt) | |
811 | return rt; | |
e305ac6c PS |
812 | } |
813 | ||
814 | rt = ip_route_output_key(geneve->net, fl4); | |
815 | if (IS_ERR(rt)) { | |
816 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 817 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
818 | } |
819 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
820 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 821 | ip_rt_put(rt); |
fc4099f1 | 822 | return ERR_PTR(-ELOOP); |
e305ac6c | 823 | } |
468dfffc PA |
824 | if (use_cache) |
825 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
826 | return rt; |
827 | } | |
828 | ||
8ed66f0e JL |
829 | #if IS_ENABLED(CONFIG_IPV6) |
830 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
831 | struct net_device *dev, | |
832 | struct flowi6 *fl6, | |
833 | struct ip_tunnel_info *info) | |
834 | { | |
835 | struct geneve_dev *geneve = netdev_priv(dev); | |
836 | struct geneve_sock *gs6 = geneve->sock6; | |
837 | struct dst_entry *dst = NULL; | |
468dfffc PA |
838 | struct dst_cache *dst_cache; |
839 | bool use_cache = true; | |
3a56f86f | 840 | __u8 prio; |
8ed66f0e JL |
841 | |
842 | memset(fl6, 0, sizeof(*fl6)); | |
843 | fl6->flowi6_mark = skb->mark; | |
844 | fl6->flowi6_proto = IPPROTO_UDP; | |
845 | ||
846 | if (info) { | |
847 | fl6->daddr = info->key.u.ipv6.dst; | |
848 | fl6->saddr = info->key.u.ipv6.src; | |
3a56f86f | 849 | fl6->flowi6_tos = RT_TOS(info->key.tos); |
468dfffc | 850 | dst_cache = &info->dst_cache; |
8ed66f0e | 851 | } else { |
3a56f86f JL |
852 | prio = geneve->tos; |
853 | if (prio == 1) { | |
854 | const struct iphdr *iip = ip_hdr(skb); | |
855 | ||
856 | prio = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 857 | use_cache = false; |
3a56f86f JL |
858 | } |
859 | ||
860 | fl6->flowi6_tos = RT_TOS(prio); | |
8ed66f0e | 861 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
468dfffc PA |
862 | dst_cache = &geneve->dst_cache; |
863 | } | |
864 | ||
865 | use_cache = use_cache && !skb->mark; | |
866 | if (use_cache) { | |
867 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
868 | if (dst) | |
869 | return dst; | |
8ed66f0e JL |
870 | } |
871 | ||
872 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
873 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
874 | return ERR_PTR(-ENETUNREACH); | |
875 | } | |
876 | if (dst->dev == dev) { /* is this necessary? */ | |
877 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
878 | dst_release(dst); | |
879 | return ERR_PTR(-ELOOP); | |
880 | } | |
881 | ||
468dfffc PA |
882 | if (use_cache) |
883 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
884 | return dst; |
885 | } | |
886 | #endif | |
887 | ||
e305ac6c PS |
888 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
889 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
890 | { | |
891 | #ifdef __BIG_ENDIAN | |
892 | vni[0] = (__force __u8)(tun_id >> 16); | |
893 | vni[1] = (__force __u8)(tun_id >> 8); | |
894 | vni[2] = (__force __u8)tun_id; | |
895 | #else | |
896 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
897 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
898 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
899 | #endif | |
900 | } | |
901 | ||
8ed66f0e JL |
902 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
903 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
904 | { |
905 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 906 | struct geneve_sock *gs4 = geneve->sock4; |
2d07dc79 | 907 | struct rtable *rt = NULL; |
08399efc | 908 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 909 | int err = -EINVAL; |
2d07dc79 | 910 | struct flowi4 fl4; |
8760ce58 | 911 | __u8 tos, ttl; |
e305ac6c | 912 | __be16 sport; |
371bd106 | 913 | __be16 df; |
8ed66f0e | 914 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 915 | u32 flags = geneve->flags; |
2d07dc79 | 916 | |
e305ac6c | 917 | if (geneve->collect_md) { |
8ed66f0e | 918 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
919 | netdev_dbg(dev, "no tunnel metadata\n"); |
920 | goto tx_error; | |
921 | } | |
7f9562a1 JB |
922 | if (info && ip_tunnel_info_af(info) != AF_INET) |
923 | goto tx_error; | |
e305ac6c | 924 | } |
980c394c | 925 | |
8ed66f0e | 926 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 927 | if (IS_ERR(rt)) { |
fc4099f1 | 928 | err = PTR_ERR(rt); |
2d07dc79 JL |
929 | goto tx_error; |
930 | } | |
371bd106 PS |
931 | |
932 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 933 | skb_reset_mac_header(skb); |
e305ac6c | 934 | |
08399efc JL |
935 | iip = ip_hdr(skb); |
936 | ||
e305ac6c PS |
937 | if (info) { |
938 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
939 | u8 *opts = NULL; |
940 | u8 vni[3]; | |
e305ac6c PS |
941 | |
942 | tunnel_id_to_vni(key->tun_id, vni); | |
e305ac6c | 943 | if (key->tun_flags & TUNNEL_GENEVE_OPT) |
4c222798 | 944 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 945 | |
abe492b4 TH |
946 | if (key->tun_flags & TUNNEL_CSUM) |
947 | flags |= GENEVE_F_UDP_CSUM; | |
948 | else | |
949 | flags &= ~GENEVE_F_UDP_CSUM; | |
950 | ||
371bd106 | 951 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 952 | info->options_len, opts, flags, xnet); |
371bd106 PS |
953 | if (unlikely(err)) |
954 | goto err; | |
955 | ||
08399efc | 956 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
957 | ttl = key->ttl; |
958 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 959 | } else { |
371bd106 | 960 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 961 | 0, NULL, flags, xnet); |
371bd106 PS |
962 | if (unlikely(err)) |
963 | goto err; | |
964 | ||
e305ac6c | 965 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
966 | ttl = geneve->ttl; |
967 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
968 | ttl = 1; | |
e305ac6c | 969 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 970 | df = 0; |
2d07dc79 | 971 | } |
039f5062 PS |
972 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
973 | tos, ttl, df, sport, geneve->dst_port, | |
974 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
975 | !(flags & GENEVE_F_UDP_CSUM)); | |
2d07dc79 | 976 | |
2d07dc79 JL |
977 | return NETDEV_TX_OK; |
978 | ||
2d07dc79 | 979 | tx_error: |
2d07dc79 | 980 | dev_kfree_skb(skb); |
371bd106 | 981 | err: |
fc4099f1 PS |
982 | if (err == -ELOOP) |
983 | dev->stats.collisions++; | |
984 | else if (err == -ENETUNREACH) | |
985 | dev->stats.tx_carrier_errors++; | |
986 | else | |
987 | dev->stats.tx_errors++; | |
2d07dc79 JL |
988 | return NETDEV_TX_OK; |
989 | } | |
990 | ||
8ed66f0e JL |
991 | #if IS_ENABLED(CONFIG_IPV6) |
992 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
993 | struct ip_tunnel_info *info) | |
994 | { | |
995 | struct geneve_dev *geneve = netdev_priv(dev); | |
996 | struct geneve_sock *gs6 = geneve->sock6; | |
997 | struct dst_entry *dst = NULL; | |
3a56f86f | 998 | const struct iphdr *iip; /* interior IP header */ |
8ed66f0e JL |
999 | int err = -EINVAL; |
1000 | struct flowi6 fl6; | |
3a56f86f | 1001 | __u8 prio, ttl; |
8ed66f0e | 1002 | __be16 sport; |
8ed66f0e | 1003 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 1004 | u32 flags = geneve->flags; |
8ed66f0e JL |
1005 | |
1006 | if (geneve->collect_md) { | |
1007 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
1008 | netdev_dbg(dev, "no tunnel metadata\n"); | |
1009 | goto tx_error; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1014 | if (IS_ERR(dst)) { | |
1015 | err = PTR_ERR(dst); | |
1016 | goto tx_error; | |
1017 | } | |
1018 | ||
1019 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
1020 | skb_reset_mac_header(skb); | |
1021 | ||
3a56f86f JL |
1022 | iip = ip_hdr(skb); |
1023 | ||
8ed66f0e JL |
1024 | if (info) { |
1025 | const struct ip_tunnel_key *key = &info->key; | |
1026 | u8 *opts = NULL; | |
1027 | u8 vni[3]; | |
1028 | ||
1029 | tunnel_id_to_vni(key->tun_id, vni); | |
1030 | if (key->tun_flags & TUNNEL_GENEVE_OPT) | |
1031 | opts = ip_tunnel_info_opts(info); | |
1032 | ||
abe492b4 | 1033 | if (key->tun_flags & TUNNEL_CSUM) |
35e2d115 | 1034 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1035 | else |
35e2d115 | 1036 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1037 | |
8ed66f0e JL |
1038 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
1039 | info->options_len, opts, | |
abe492b4 | 1040 | flags, xnet); |
8ed66f0e JL |
1041 | if (unlikely(err)) |
1042 | goto err; | |
1043 | ||
3a56f86f | 1044 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e JL |
1045 | ttl = key->ttl; |
1046 | } else { | |
8ed66f0e | 1047 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, |
abe492b4 | 1048 | 0, NULL, flags, xnet); |
8ed66f0e JL |
1049 | if (unlikely(err)) |
1050 | goto err; | |
1051 | ||
3a56f86f | 1052 | prio = ip_tunnel_ecn_encap(fl6.flowi6_tos, iip, skb); |
8ed66f0e JL |
1053 | ttl = geneve->ttl; |
1054 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1055 | ttl = 1; | |
1056 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
1057 | } | |
039f5062 PS |
1058 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
1059 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
1060 | sport, geneve->dst_port, | |
1061 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1062 | return NETDEV_TX_OK; |
1063 | ||
1064 | tx_error: | |
1065 | dev_kfree_skb(skb); | |
1066 | err: | |
1067 | if (err == -ELOOP) | |
1068 | dev->stats.collisions++; | |
1069 | else if (err == -ENETUNREACH) | |
1070 | dev->stats.tx_carrier_errors++; | |
1071 | else | |
1072 | dev->stats.tx_errors++; | |
1073 | return NETDEV_TX_OK; | |
1074 | } | |
1075 | #endif | |
1076 | ||
1077 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1078 | { | |
1079 | struct geneve_dev *geneve = netdev_priv(dev); | |
1080 | struct ip_tunnel_info *info = NULL; | |
1081 | ||
1082 | if (geneve->collect_md) | |
1083 | info = skb_tunnel_info(skb); | |
1084 | ||
1085 | #if IS_ENABLED(CONFIG_IPV6) | |
1086 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1087 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1088 | return geneve6_xmit_skb(skb, dev, info); | |
1089 | #endif | |
1090 | return geneve_xmit_skb(skb, dev, info); | |
1091 | } | |
1092 | ||
fc4099f1 PS |
1093 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1094 | { | |
1095 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1096 | struct geneve_dev *geneve = netdev_priv(dev); | |
1097 | struct rtable *rt; | |
1098 | struct flowi4 fl4; | |
b8812fa8 JL |
1099 | #if IS_ENABLED(CONFIG_IPV6) |
1100 | struct dst_entry *dst; | |
1101 | struct flowi6 fl6; | |
1102 | #endif | |
fc4099f1 | 1103 | |
b8812fa8 JL |
1104 | if (ip_tunnel_info_af(info) == AF_INET) { |
1105 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1106 | if (IS_ERR(rt)) | |
1107 | return PTR_ERR(rt); | |
fc4099f1 | 1108 | |
b8812fa8 JL |
1109 | ip_rt_put(rt); |
1110 | info->key.u.ipv4.src = fl4.saddr; | |
1111 | #if IS_ENABLED(CONFIG_IPV6) | |
1112 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1113 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1114 | if (IS_ERR(dst)) | |
1115 | return PTR_ERR(dst); | |
1116 | ||
1117 | dst_release(dst); | |
1118 | info->key.u.ipv6.src = fl6.saddr; | |
1119 | #endif | |
1120 | } else { | |
1121 | return -EINVAL; | |
1122 | } | |
fc4099f1 | 1123 | |
fc4099f1 PS |
1124 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1125 | 1, USHRT_MAX, true); | |
1126 | info->key.tp_dst = geneve->dst_port; | |
1127 | return 0; | |
1128 | } | |
1129 | ||
2d07dc79 JL |
1130 | static const struct net_device_ops geneve_netdev_ops = { |
1131 | .ndo_init = geneve_init, | |
1132 | .ndo_uninit = geneve_uninit, | |
1133 | .ndo_open = geneve_open, | |
1134 | .ndo_stop = geneve_stop, | |
1135 | .ndo_start_xmit = geneve_xmit, | |
1136 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
1137 | .ndo_change_mtu = eth_change_mtu, | |
1138 | .ndo_validate_addr = eth_validate_addr, | |
1139 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1140 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1141 | }; |
1142 | ||
1143 | static void geneve_get_drvinfo(struct net_device *dev, | |
1144 | struct ethtool_drvinfo *drvinfo) | |
1145 | { | |
1146 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1147 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1148 | } | |
1149 | ||
1150 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1151 | .get_drvinfo = geneve_get_drvinfo, | |
1152 | .get_link = ethtool_op_get_link, | |
1153 | }; | |
1154 | ||
1155 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1156 | static struct device_type geneve_type = { | |
1157 | .name = "geneve", | |
1158 | }; | |
1159 | ||
05ca4029 SA |
1160 | /* Calls the ndo_add_geneve_port of the caller in order to |
1161 | * supply the listening GENEVE udp ports. Callers are expected | |
1162 | * to implement the ndo_add_geneve_port. | |
1163 | */ | |
1164 | void geneve_get_rx_port(struct net_device *dev) | |
1165 | { | |
1166 | struct net *net = dev_net(dev); | |
1167 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1168 | struct geneve_sock *gs; | |
1169 | sa_family_t sa_family; | |
1170 | struct sock *sk; | |
1171 | __be16 port; | |
1172 | ||
1173 | rcu_read_lock(); | |
1174 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { | |
1175 | sk = gs->sock->sk; | |
1176 | sa_family = sk->sk_family; | |
1177 | port = inet_sk(sk)->inet_sport; | |
1178 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, port); | |
1179 | } | |
1180 | rcu_read_unlock(); | |
1181 | } | |
1182 | EXPORT_SYMBOL_GPL(geneve_get_rx_port); | |
1183 | ||
2d07dc79 JL |
1184 | /* Initialize the device structure. */ |
1185 | static void geneve_setup(struct net_device *dev) | |
1186 | { | |
1187 | ether_setup(dev); | |
1188 | ||
1189 | dev->netdev_ops = &geneve_netdev_ops; | |
1190 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1191 | dev->destructor = free_netdev; | |
1192 | ||
1193 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1194 | ||
2d07dc79 JL |
1195 | dev->features |= NETIF_F_LLTX; |
1196 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1197 | dev->features |= NETIF_F_RXCSUM; | |
1198 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1199 | ||
2d07dc79 JL |
1200 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1201 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1202 | |
1203 | netif_keep_dst(dev); | |
ed961ac2 | 1204 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1205 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1206 | } |
1207 | ||
1208 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1209 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1210 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1211 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1212 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1213 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
cd7918b3 | 1214 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1215 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1216 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1217 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1218 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1219 | }; |
1220 | ||
1221 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1222 | { | |
1223 | if (tb[IFLA_ADDRESS]) { | |
1224 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1225 | return -EINVAL; | |
1226 | ||
1227 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1228 | return -EADDRNOTAVAIL; | |
1229 | } | |
1230 | ||
1231 | if (!data) | |
1232 | return -EINVAL; | |
1233 | ||
1234 | if (data[IFLA_GENEVE_ID]) { | |
1235 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1236 | ||
1237 | if (vni >= GENEVE_VID_MASK) | |
1238 | return -ERANGE; | |
1239 | } | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
371bd106 PS |
1244 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1245 | __be16 dst_port, | |
8ed66f0e | 1246 | union geneve_addr *remote, |
371bd106 PS |
1247 | u8 vni[], |
1248 | bool *tun_on_same_port, | |
1249 | bool *tun_collect_md) | |
1250 | { | |
1251 | struct geneve_dev *geneve, *t; | |
1252 | ||
1253 | *tun_on_same_port = false; | |
1254 | *tun_collect_md = false; | |
1255 | t = NULL; | |
1256 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1257 | if (geneve->dst_port == dst_port) { | |
1258 | *tun_collect_md = geneve->collect_md; | |
1259 | *tun_on_same_port = true; | |
1260 | } | |
1261 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1262 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1263 | dst_port == geneve->dst_port) |
1264 | t = geneve; | |
1265 | } | |
1266 | return t; | |
1267 | } | |
1268 | ||
e305ac6c | 1269 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e JL |
1270 | union geneve_addr *remote, |
1271 | __u32 vni, __u8 ttl, __u8 tos, __be16 dst_port, | |
abe492b4 | 1272 | bool metadata, u32 flags) |
2d07dc79 JL |
1273 | { |
1274 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1275 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1276 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1277 | int err, encap_len; |
2d07dc79 | 1278 | |
8ed66f0e JL |
1279 | if (!remote) |
1280 | return -EINVAL; | |
1281 | if (metadata && | |
1282 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl)) | |
1283 | return -EINVAL; | |
2d07dc79 JL |
1284 | |
1285 | geneve->net = net; | |
1286 | geneve->dev = dev; | |
1287 | ||
2d07dc79 JL |
1288 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1289 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1290 | geneve->vni[2] = vni & 0x000000ff; | |
1291 | ||
8ed66f0e JL |
1292 | if ((remote->sa.sa_family == AF_INET && |
1293 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1294 | (remote->sa.sa_family == AF_INET6 && | |
1295 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1296 | return -EINVAL; |
8ed66f0e | 1297 | geneve->remote = *remote; |
2d07dc79 | 1298 | |
e305ac6c PS |
1299 | geneve->ttl = ttl; |
1300 | geneve->tos = tos; | |
7bbe33ff | 1301 | geneve->dst_port = dst_port; |
e305ac6c | 1302 | geneve->collect_md = metadata; |
abe492b4 | 1303 | geneve->flags = flags; |
e305ac6c | 1304 | |
8ed66f0e | 1305 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1306 | &tun_on_same_port, &tun_collect_md); |
1307 | if (t) | |
1308 | return -EBUSY; | |
1309 | ||
184fc8b5 PA |
1310 | /* make enough headroom for basic scenario */ |
1311 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1312 | if (remote->sa.sa_family == AF_INET) | |
1313 | encap_len += sizeof(struct iphdr); | |
1314 | else | |
1315 | encap_len += sizeof(struct ipv6hdr); | |
1316 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1317 | ||
371bd106 PS |
1318 | if (metadata) { |
1319 | if (tun_on_same_port) | |
1320 | return -EPERM; | |
1321 | } else { | |
1322 | if (tun_collect_md) | |
1323 | return -EPERM; | |
1324 | } | |
1325 | ||
468dfffc PA |
1326 | dst_cache_reset(&geneve->dst_cache); |
1327 | ||
2d07dc79 JL |
1328 | err = register_netdevice(dev); |
1329 | if (err) | |
1330 | return err; | |
1331 | ||
e305ac6c | 1332 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1333 | return 0; |
1334 | } | |
1335 | ||
1336 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1337 | struct nlattr *tb[], struct nlattr *data[]) | |
1338 | { | |
7bbe33ff | 1339 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1340 | __u8 ttl = 0, tos = 0; |
1341 | bool metadata = false; | |
8ed66f0e | 1342 | union geneve_addr remote = geneve_remote_unspec; |
e277de5f | 1343 | __u32 vni = 0; |
abe492b4 | 1344 | u32 flags = 0; |
e305ac6c | 1345 | |
8ed66f0e JL |
1346 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1347 | return -EINVAL; | |
1348 | ||
1349 | if (data[IFLA_GENEVE_REMOTE]) { | |
1350 | remote.sa.sa_family = AF_INET; | |
1351 | remote.sin.sin_addr.s_addr = | |
1352 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1353 | } | |
1354 | ||
1355 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1356 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1357 | return -EPFNOSUPPORT; | |
1358 | ||
1359 | remote.sa.sa_family = AF_INET6; | |
1360 | remote.sin6.sin6_addr = | |
1361 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1362 | ||
1363 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1364 | IPV6_ADDR_LINKLOCAL) { | |
1365 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1366 | return -EINVAL; | |
1367 | } | |
1368 | } | |
1369 | ||
e277de5f JG |
1370 | if (data[IFLA_GENEVE_ID]) |
1371 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1372 | |
8760ce58 | 1373 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1374 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1375 | |
d8951125 | 1376 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1377 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1378 | |
e305ac6c | 1379 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1380 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1381 | |
e305ac6c PS |
1382 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1383 | metadata = true; | |
2d07dc79 | 1384 | |
abe492b4 TH |
1385 | if (data[IFLA_GENEVE_UDP_CSUM] && |
1386 | nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) | |
1387 | flags |= GENEVE_F_UDP_CSUM; | |
1388 | ||
1389 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1390 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1391 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1392 | ||
1393 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1394 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1395 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1396 | ||
8ed66f0e | 1397 | return geneve_configure(net, dev, &remote, vni, ttl, tos, dst_port, |
abe492b4 | 1398 | metadata, flags); |
2d07dc79 JL |
1399 | } |
1400 | ||
1401 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1402 | { | |
1403 | struct geneve_dev *geneve = netdev_priv(dev); | |
1404 | ||
2d07dc79 JL |
1405 | list_del(&geneve->next); |
1406 | unregister_netdevice_queue(dev, head); | |
1407 | } | |
1408 | ||
1409 | static size_t geneve_get_size(const struct net_device *dev) | |
1410 | { | |
1411 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1412 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1413 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1414 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
7bbe33ff | 1415 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1416 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1417 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1418 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1419 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1420 | 0; |
1421 | } | |
1422 | ||
1423 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1424 | { | |
1425 | struct geneve_dev *geneve = netdev_priv(dev); | |
1426 | __u32 vni; | |
1427 | ||
1428 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1429 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1430 | goto nla_put_failure; | |
1431 | ||
8ed66f0e JL |
1432 | if (geneve->remote.sa.sa_family == AF_INET) { |
1433 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1434 | geneve->remote.sin.sin_addr.s_addr)) | |
1435 | goto nla_put_failure; | |
1436 | #if IS_ENABLED(CONFIG_IPV6) | |
1437 | } else { | |
1438 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1439 | &geneve->remote.sin6.sin6_addr)) | |
1440 | goto nla_put_failure; | |
1441 | #endif | |
1442 | } | |
2d07dc79 | 1443 | |
d8951125 JL |
1444 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
1445 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) | |
8760ce58 JL |
1446 | goto nla_put_failure; |
1447 | ||
7bbe33ff | 1448 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1449 | goto nla_put_failure; |
1450 | ||
e305ac6c PS |
1451 | if (geneve->collect_md) { |
1452 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1453 | goto nla_put_failure; | |
1454 | } | |
1455 | ||
abe492b4 TH |
1456 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1457 | !!(geneve->flags & GENEVE_F_UDP_CSUM)) || | |
1458 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1459 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1460 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1461 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1462 | goto nla_put_failure; | |
1463 | ||
2d07dc79 JL |
1464 | return 0; |
1465 | ||
1466 | nla_put_failure: | |
1467 | return -EMSGSIZE; | |
1468 | } | |
1469 | ||
1470 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1471 | .kind = "geneve", | |
1472 | .maxtype = IFLA_GENEVE_MAX, | |
1473 | .policy = geneve_policy, | |
1474 | .priv_size = sizeof(struct geneve_dev), | |
1475 | .setup = geneve_setup, | |
1476 | .validate = geneve_validate, | |
1477 | .newlink = geneve_newlink, | |
1478 | .dellink = geneve_dellink, | |
1479 | .get_size = geneve_get_size, | |
1480 | .fill_info = geneve_fill_info, | |
1481 | }; | |
1482 | ||
e305ac6c PS |
1483 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1484 | u8 name_assign_type, u16 dst_port) | |
1485 | { | |
1486 | struct nlattr *tb[IFLA_MAX + 1]; | |
1487 | struct net_device *dev; | |
1488 | int err; | |
1489 | ||
1490 | memset(tb, 0, sizeof(tb)); | |
1491 | dev = rtnl_create_link(net, name, name_assign_type, | |
1492 | &geneve_link_ops, tb); | |
1493 | if (IS_ERR(dev)) | |
1494 | return dev; | |
1495 | ||
8ed66f0e | 1496 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
abe492b4 | 1497 | 0, 0, 0, htons(dst_port), true, 0); |
e305ac6c PS |
1498 | if (err) { |
1499 | free_netdev(dev); | |
1500 | return ERR_PTR(err); | |
1501 | } | |
1502 | return dev; | |
1503 | } | |
1504 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1505 | ||
2d07dc79 JL |
1506 | static __net_init int geneve_init_net(struct net *net) |
1507 | { | |
1508 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1509 | |
1510 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1511 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1512 | return 0; |
1513 | } | |
1514 | ||
1515 | static void __net_exit geneve_exit_net(struct net *net) | |
1516 | { | |
1517 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1518 | struct geneve_dev *geneve, *next; | |
1519 | struct net_device *dev, *aux; | |
1520 | LIST_HEAD(list); | |
1521 | ||
1522 | rtnl_lock(); | |
1523 | ||
1524 | /* gather any geneve devices that were moved into this ns */ | |
1525 | for_each_netdev_safe(net, dev, aux) | |
1526 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1527 | unregister_netdevice_queue(dev, &list); | |
1528 | ||
1529 | /* now gather any other geneve devices that were created in this ns */ | |
1530 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1531 | /* If geneve->dev is in the same netns, it was already added | |
1532 | * to the list by the previous loop. | |
1533 | */ | |
1534 | if (!net_eq(dev_net(geneve->dev), net)) | |
1535 | unregister_netdevice_queue(geneve->dev, &list); | |
1536 | } | |
1537 | ||
1538 | /* unregister the devices gathered above */ | |
1539 | unregister_netdevice_many(&list); | |
1540 | rtnl_unlock(); | |
1541 | } | |
1542 | ||
1543 | static struct pernet_operations geneve_net_ops = { | |
1544 | .init = geneve_init_net, | |
1545 | .exit = geneve_exit_net, | |
1546 | .id = &geneve_net_id, | |
1547 | .size = sizeof(struct geneve_net), | |
1548 | }; | |
1549 | ||
1550 | static int __init geneve_init_module(void) | |
1551 | { | |
1552 | int rc; | |
1553 | ||
1554 | rc = register_pernet_subsys(&geneve_net_ops); | |
1555 | if (rc) | |
1556 | goto out1; | |
1557 | ||
1558 | rc = rtnl_link_register(&geneve_link_ops); | |
1559 | if (rc) | |
1560 | goto out2; | |
1561 | ||
1562 | return 0; | |
1563 | out2: | |
1564 | unregister_pernet_subsys(&geneve_net_ops); | |
1565 | out1: | |
1566 | return rc; | |
1567 | } | |
1568 | late_initcall(geneve_init_module); | |
1569 | ||
1570 | static void __exit geneve_cleanup_module(void) | |
1571 | { | |
1572 | rtnl_link_unregister(&geneve_link_ops); | |
1573 | unregister_pernet_subsys(&geneve_net_ops); | |
1574 | } | |
1575 | module_exit(geneve_cleanup_module); | |
1576 | ||
1577 | MODULE_LICENSE("GPL"); | |
1578 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1579 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1580 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1581 | MODULE_ALIAS_RTNL_LINK("geneve"); |