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> | |
2d07dc79 JL |
15 | #include <linux/etherdevice.h> |
16 | #include <linux/hash.h> | |
e305ac6c | 17 | #include <net/dst_metadata.h> |
8e816df8 | 18 | #include <net/gro_cells.h> |
2d07dc79 JL |
19 | #include <net/rtnetlink.h> |
20 | #include <net/geneve.h> | |
371bd106 | 21 | #include <net/protocol.h> |
2d07dc79 JL |
22 | |
23 | #define GENEVE_NETDEV_VER "0.6" | |
24 | ||
25 | #define GENEVE_UDP_PORT 6081 | |
26 | ||
27 | #define GENEVE_N_VID (1u << 24) | |
28 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
29 | ||
30 | #define VNI_HASH_BITS 10 | |
31 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
32 | ||
33 | static bool log_ecn_error = true; | |
34 | module_param(log_ecn_error, bool, 0644); | |
35 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
36 | ||
371bd106 PS |
37 | #define GENEVE_VER 0 |
38 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
39 | ||
2d07dc79 JL |
40 | /* per-network namespace private data for this module */ |
41 | struct geneve_net { | |
371bd106 | 42 | struct list_head geneve_list; |
371bd106 | 43 | struct list_head sock_list; |
2d07dc79 JL |
44 | }; |
45 | ||
371bd106 PS |
46 | static int geneve_net_id; |
47 | ||
8ed66f0e JL |
48 | union geneve_addr { |
49 | struct sockaddr_in sin; | |
50 | struct sockaddr_in6 sin6; | |
51 | struct sockaddr sa; | |
52 | }; | |
53 | ||
54 | static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, }; | |
55 | ||
2d07dc79 JL |
56 | /* Pseudo network device */ |
57 | struct geneve_dev { | |
58 | struct hlist_node hlist; /* vni hash table */ | |
59 | struct net *net; /* netns for packet i/o */ | |
60 | struct net_device *dev; /* netdev for geneve tunnel */ | |
8ed66f0e JL |
61 | struct geneve_sock *sock4; /* IPv4 socket used for geneve tunnel */ |
62 | #if IS_ENABLED(CONFIG_IPV6) | |
63 | struct geneve_sock *sock6; /* IPv6 socket used for geneve tunnel */ | |
64 | #endif | |
8760ce58 JL |
65 | u8 vni[3]; /* virtual network ID for tunnel */ |
66 | u8 ttl; /* TTL override */ | |
d8951125 | 67 | u8 tos; /* TOS override */ |
8ed66f0e | 68 | union geneve_addr remote; /* IP address for link partner */ |
2d07dc79 | 69 | struct list_head next; /* geneve's per namespace list */ |
8eb3b995 | 70 | __be32 label; /* IPv6 flowlabel override */ |
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 | 78 | /* Geneve device flags */ |
14f1f724 | 79 | #define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0) |
abe492b4 TH |
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; | |
66d47003 | 89 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
abe492b4 | 90 | u32 flags; |
371bd106 | 91 | }; |
2d07dc79 JL |
92 | |
93 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
94 | { | |
95 | __u32 vnid; | |
96 | ||
97 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
98 | return hash_32(vnid, VNI_HASH_BITS); | |
99 | } | |
100 | ||
e305ac6c PS |
101 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
102 | { | |
103 | #ifdef __BIG_ENDIAN | |
104 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
105 | #else | |
106 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
107 | ((__force u64)vni[1] << 48) | | |
108 | ((__force u64)vni[2] << 56)); | |
109 | #endif | |
110 | } | |
111 | ||
1e9f12ec JB |
112 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
113 | { | |
114 | return gs->sock->sk->sk_family; | |
115 | } | |
116 | ||
66d47003 | 117 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 118 | __be32 addr, u8 vni[]) |
2d07dc79 | 119 | { |
2d07dc79 | 120 | struct hlist_head *vni_list_head; |
e305ac6c | 121 | struct geneve_dev *geneve; |
2d07dc79 JL |
122 | __u32 hash; |
123 | ||
2d07dc79 | 124 | /* Find the device for this VNI */ |
371bd106 | 125 | hash = geneve_net_vni_hash(vni); |
66d47003 | 126 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 127 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 128 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
8ed66f0e JL |
129 | addr == geneve->remote.sin.sin_addr.s_addr) |
130 | return geneve; | |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
135 | #if IS_ENABLED(CONFIG_IPV6) | |
136 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
137 | struct in6_addr addr6, u8 vni[]) | |
138 | { | |
139 | struct hlist_head *vni_list_head; | |
140 | struct geneve_dev *geneve; | |
141 | __u32 hash; | |
142 | ||
143 | /* Find the device for this VNI */ | |
144 | hash = geneve_net_vni_hash(vni); | |
145 | vni_list_head = &gs->vni_list[hash]; | |
146 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
147 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
148 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e305ac6c | 149 | return geneve; |
2d07dc79 | 150 | } |
e305ac6c PS |
151 | return NULL; |
152 | } | |
8ed66f0e | 153 | #endif |
e305ac6c | 154 | |
371bd106 PS |
155 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
156 | { | |
157 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
158 | } | |
159 | ||
9fc47545 JB |
160 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
161 | struct sk_buff *skb) | |
e305ac6c | 162 | { |
9fc47545 | 163 | u8 *vni; |
371bd106 | 164 | __be32 addr; |
8ed66f0e | 165 | static u8 zero_vni[3]; |
8ed66f0e | 166 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
167 | static struct in6_addr zero_addr6; |
168 | #endif | |
e305ac6c | 169 | |
1e9f12ec | 170 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 JB |
171 | struct iphdr *iph; |
172 | ||
8ed66f0e | 173 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 174 | |
8ed66f0e JL |
175 | if (gs->collect_md) { |
176 | vni = zero_vni; | |
177 | addr = 0; | |
178 | } else { | |
9fc47545 | 179 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
180 | addr = iph->saddr; |
181 | } | |
182 | ||
9fc47545 | 183 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 184 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 185 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9fc47545 JB |
186 | struct ipv6hdr *ip6h; |
187 | struct in6_addr addr6; | |
188 | ||
8ed66f0e | 189 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 190 | |
8ed66f0e JL |
191 | if (gs->collect_md) { |
192 | vni = zero_vni; | |
193 | addr6 = zero_addr6; | |
194 | } else { | |
9fc47545 | 195 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
196 | addr6 = ip6h->saddr; |
197 | } | |
198 | ||
9fc47545 | 199 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
200 | #endif |
201 | } | |
9fc47545 JB |
202 | return NULL; |
203 | } | |
204 | ||
205 | /* geneve receive/decap routine */ | |
206 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
207 | struct sk_buff *skb) | |
208 | { | |
209 | struct genevehdr *gnvh = geneve_hdr(skb); | |
210 | struct metadata_dst *tun_dst = NULL; | |
211 | struct pcpu_sw_netstats *stats; | |
212 | int err = 0; | |
213 | void *oiph; | |
2d07dc79 | 214 | |
371bd106 | 215 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 216 | __be16 flags; |
e305ac6c PS |
217 | |
218 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
219 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
220 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
221 | ||
1e9f12ec | 222 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
223 | vni_to_tunnel_id(gnvh->vni), |
224 | gnvh->opt_len * 4); | |
225 | if (!tun_dst) | |
226 | goto drop; | |
e305ac6c | 227 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
228 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
229 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
230 | } else { |
231 | /* Drop packets w/ critical options, | |
232 | * since we don't support any... | |
233 | */ | |
234 | if (gnvh->critical) | |
235 | goto drop; | |
236 | } | |
2d07dc79 JL |
237 | |
238 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
239 | skb->protocol = eth_type_trans(skb, geneve->dev); |
240 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
241 | ||
e305ac6c PS |
242 | if (tun_dst) |
243 | skb_dst_set(skb, &tun_dst->dst); | |
244 | ||
2d07dc79 JL |
245 | /* Ignore packet loops (and multicast echo) */ |
246 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
247 | goto drop; | |
248 | ||
9fc47545 | 249 | oiph = skb_network_header(skb); |
2d07dc79 JL |
250 | skb_reset_network_header(skb); |
251 | ||
9fc47545 JB |
252 | if (geneve_get_sk_family(gs) == AF_INET) |
253 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 254 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
255 | else |
256 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 257 | #endif |
2d07dc79 JL |
258 | |
259 | if (unlikely(err)) { | |
8ed66f0e | 260 | if (log_ecn_error) { |
9fc47545 | 261 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
262 | net_info_ratelimited("non-ECT from %pI4 " |
263 | "with TOS=%#x\n", | |
9fc47545 JB |
264 | &((struct iphdr *)oiph)->saddr, |
265 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 266 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 267 | else |
8ed66f0e | 268 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 269 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
270 | #endif |
271 | } | |
2d07dc79 JL |
272 | if (err > 1) { |
273 | ++geneve->dev->stats.rx_frame_errors; | |
274 | ++geneve->dev->stats.rx_errors; | |
275 | goto drop; | |
276 | } | |
277 | } | |
278 | ||
279 | stats = this_cpu_ptr(geneve->dev->tstats); | |
280 | u64_stats_update_begin(&stats->syncp); | |
281 | stats->rx_packets++; | |
282 | stats->rx_bytes += skb->len; | |
283 | u64_stats_update_end(&stats->syncp); | |
284 | ||
8e816df8 | 285 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
286 | return; |
287 | drop: | |
288 | /* Consume bad packet */ | |
289 | kfree_skb(skb); | |
290 | } | |
291 | ||
292 | /* Setup stats when device is created */ | |
293 | static int geneve_init(struct net_device *dev) | |
294 | { | |
8e816df8 JG |
295 | struct geneve_dev *geneve = netdev_priv(dev); |
296 | int err; | |
297 | ||
2d07dc79 JL |
298 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
299 | if (!dev->tstats) | |
300 | return -ENOMEM; | |
8e816df8 JG |
301 | |
302 | err = gro_cells_init(&geneve->gro_cells, dev); | |
303 | if (err) { | |
304 | free_percpu(dev->tstats); | |
305 | return err; | |
306 | } | |
307 | ||
468dfffc PA |
308 | err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL); |
309 | if (err) { | |
310 | free_percpu(dev->tstats); | |
311 | gro_cells_destroy(&geneve->gro_cells); | |
312 | return err; | |
313 | } | |
314 | ||
2d07dc79 JL |
315 | return 0; |
316 | } | |
317 | ||
318 | static void geneve_uninit(struct net_device *dev) | |
319 | { | |
8e816df8 JG |
320 | struct geneve_dev *geneve = netdev_priv(dev); |
321 | ||
468dfffc | 322 | dst_cache_destroy(&geneve->dst_cache); |
8e816df8 | 323 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
324 | free_percpu(dev->tstats); |
325 | } | |
326 | ||
371bd106 PS |
327 | /* Callback from net/ipv4/udp.c to receive packets */ |
328 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
329 | { | |
330 | struct genevehdr *geneveh; | |
9fc47545 | 331 | struct geneve_dev *geneve; |
371bd106 PS |
332 | struct geneve_sock *gs; |
333 | int opts_len; | |
334 | ||
335 | /* Need Geneve and inner Ethernet header to be present */ | |
336 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
e5aed006 | 337 | goto drop; |
371bd106 PS |
338 | |
339 | /* Return packets with reserved bits set */ | |
340 | geneveh = geneve_hdr(skb); | |
341 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 342 | goto drop; |
371bd106 PS |
343 | |
344 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 345 | goto drop; |
371bd106 | 346 | |
9fc47545 JB |
347 | gs = rcu_dereference_sk_user_data(sk); |
348 | if (!gs) | |
349 | goto drop; | |
350 | ||
351 | geneve = geneve_lookup_skb(gs, skb); | |
352 | if (!geneve) | |
353 | goto drop; | |
354 | ||
371bd106 PS |
355 | opts_len = geneveh->opt_len * 4; |
356 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 JB |
357 | htons(ETH_P_TEB), |
358 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
371bd106 PS |
359 | goto drop; |
360 | ||
9fc47545 | 361 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
362 | return 0; |
363 | ||
364 | drop: | |
365 | /* Consume bad packet */ | |
366 | kfree_skb(skb); | |
367 | return 0; | |
371bd106 PS |
368 | } |
369 | ||
370 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
abe492b4 | 371 | __be16 port, u32 flags) |
371bd106 PS |
372 | { |
373 | struct socket *sock; | |
374 | struct udp_port_cfg udp_conf; | |
375 | int err; | |
376 | ||
377 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
378 | ||
379 | if (ipv6) { | |
380 | udp_conf.family = AF_INET6; | |
8ed66f0e | 381 | udp_conf.ipv6_v6only = 1; |
abe492b4 TH |
382 | udp_conf.use_udp6_rx_checksums = |
383 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
371bd106 PS |
384 | } else { |
385 | udp_conf.family = AF_INET; | |
386 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
387 | } | |
388 | ||
389 | udp_conf.local_udp_port = port; | |
390 | ||
391 | /* Open UDP socket */ | |
392 | err = udp_sock_create(net, &udp_conf, &sock); | |
393 | if (err < 0) | |
394 | return ERR_PTR(err); | |
395 | ||
396 | return sock; | |
397 | } | |
398 | ||
371bd106 PS |
399 | static int geneve_hlen(struct genevehdr *gh) |
400 | { | |
401 | return sizeof(*gh) + gh->opt_len * 4; | |
402 | } | |
403 | ||
4a0090a9 TH |
404 | static struct sk_buff **geneve_gro_receive(struct sock *sk, |
405 | struct sk_buff **head, | |
406 | struct sk_buff *skb) | |
371bd106 PS |
407 | { |
408 | struct sk_buff *p, **pp = NULL; | |
409 | struct genevehdr *gh, *gh2; | |
410 | unsigned int hlen, gh_len, off_gnv; | |
411 | const struct packet_offload *ptype; | |
412 | __be16 type; | |
413 | int flush = 1; | |
414 | ||
415 | off_gnv = skb_gro_offset(skb); | |
416 | hlen = off_gnv + sizeof(*gh); | |
417 | gh = skb_gro_header_fast(skb, off_gnv); | |
418 | if (skb_gro_header_hard(skb, hlen)) { | |
419 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
420 | if (unlikely(!gh)) | |
421 | goto out; | |
422 | } | |
423 | ||
424 | if (gh->ver != GENEVE_VER || gh->oam) | |
425 | goto out; | |
426 | gh_len = geneve_hlen(gh); | |
427 | ||
428 | hlen = off_gnv + gh_len; | |
429 | if (skb_gro_header_hard(skb, hlen)) { | |
430 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
431 | if (unlikely(!gh)) | |
432 | goto out; | |
433 | } | |
434 | ||
371bd106 PS |
435 | for (p = *head; p; p = p->next) { |
436 | if (!NAPI_GRO_CB(p)->same_flow) | |
437 | continue; | |
438 | ||
439 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
440 | if (gh->opt_len != gh2->opt_len || | |
441 | memcmp(gh, gh2, gh_len)) { | |
442 | NAPI_GRO_CB(p)->same_flow = 0; | |
443 | continue; | |
444 | } | |
445 | } | |
446 | ||
447 | type = gh->proto_type; | |
448 | ||
449 | rcu_read_lock(); | |
450 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 451 | if (!ptype) |
371bd106 | 452 | goto out_unlock; |
371bd106 PS |
453 | |
454 | skb_gro_pull(skb, gh_len); | |
455 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
456 | pp = ptype->callbacks.gro_receive(head, skb); | |
c194cf93 | 457 | flush = 0; |
371bd106 PS |
458 | |
459 | out_unlock: | |
460 | rcu_read_unlock(); | |
461 | out: | |
462 | NAPI_GRO_CB(skb)->flush |= flush; | |
463 | ||
464 | return pp; | |
465 | } | |
466 | ||
4a0090a9 TH |
467 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
468 | int nhoff) | |
371bd106 PS |
469 | { |
470 | struct genevehdr *gh; | |
471 | struct packet_offload *ptype; | |
472 | __be16 type; | |
473 | int gh_len; | |
474 | int err = -ENOSYS; | |
475 | ||
371bd106 PS |
476 | gh = (struct genevehdr *)(skb->data + nhoff); |
477 | gh_len = geneve_hlen(gh); | |
478 | type = gh->proto_type; | |
479 | ||
480 | rcu_read_lock(); | |
481 | ptype = gro_find_complete_by_type(type); | |
482 | if (ptype) | |
483 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
484 | ||
485 | rcu_read_unlock(); | |
229740c6 JR |
486 | |
487 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
488 | ||
371bd106 PS |
489 | return err; |
490 | } | |
491 | ||
492 | /* Create new listen socket if needed */ | |
493 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
abe492b4 | 494 | bool ipv6, u32 flags) |
371bd106 PS |
495 | { |
496 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
497 | struct geneve_sock *gs; | |
498 | struct socket *sock; | |
499 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 500 | int h; |
371bd106 PS |
501 | |
502 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
503 | if (!gs) | |
504 | return ERR_PTR(-ENOMEM); | |
505 | ||
abe492b4 | 506 | sock = geneve_create_sock(net, ipv6, port, flags); |
371bd106 PS |
507 | if (IS_ERR(sock)) { |
508 | kfree(gs); | |
509 | return ERR_CAST(sock); | |
510 | } | |
511 | ||
512 | gs->sock = sock; | |
513 | gs->refcnt = 1; | |
66d47003 PS |
514 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
515 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
516 | |
517 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 518 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
519 | |
520 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 521 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
522 | tunnel_cfg.sk_user_data = gs; |
523 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
524 | tunnel_cfg.gro_receive = geneve_gro_receive; |
525 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 PS |
526 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
527 | tunnel_cfg.encap_destroy = NULL; | |
528 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
529 | list_add(&gs->list, &gn->sock_list); |
530 | return gs; | |
531 | } | |
532 | ||
8ed66f0e | 533 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 534 | { |
8ed66f0e | 535 | if (!gs || --gs->refcnt) |
371bd106 PS |
536 | return; |
537 | ||
538 | list_del(&gs->list); | |
e7b3db5e | 539 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
540 | udp_tunnel_sock_release(gs->sock); |
541 | kfree_rcu(gs, rcu); | |
542 | } | |
543 | ||
8ed66f0e JL |
544 | static void geneve_sock_release(struct geneve_dev *geneve) |
545 | { | |
546 | __geneve_sock_release(geneve->sock4); | |
547 | #if IS_ENABLED(CONFIG_IPV6) | |
548 | __geneve_sock_release(geneve->sock6); | |
549 | #endif | |
550 | } | |
551 | ||
371bd106 | 552 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 553 | sa_family_t family, |
371bd106 PS |
554 | __be16 dst_port) |
555 | { | |
556 | struct geneve_sock *gs; | |
557 | ||
558 | list_for_each_entry(gs, &gn->sock_list, list) { | |
559 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 560 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
561 | return gs; |
562 | } | |
563 | } | |
564 | return NULL; | |
565 | } | |
566 | ||
8ed66f0e | 567 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 568 | { |
2d07dc79 | 569 | struct net *net = geneve->net; |
371bd106 | 570 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 571 | struct geneve_sock *gs; |
66d47003 | 572 | __u32 hash; |
2d07dc79 | 573 | |
8ed66f0e | 574 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
575 | if (gs) { |
576 | gs->refcnt++; | |
577 | goto out; | |
578 | } | |
579 | ||
abe492b4 | 580 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
581 | if (IS_ERR(gs)) |
582 | return PTR_ERR(gs); | |
583 | ||
371bd106 PS |
584 | out: |
585 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 586 | gs->flags = geneve->flags; |
8ed66f0e JL |
587 | #if IS_ENABLED(CONFIG_IPV6) |
588 | if (ipv6) | |
589 | geneve->sock6 = gs; | |
590 | else | |
591 | #endif | |
592 | geneve->sock4 = gs; | |
66d47003 PS |
593 | |
594 | hash = geneve_net_vni_hash(geneve->vni); | |
595 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
596 | return 0; |
597 | } | |
598 | ||
8ed66f0e JL |
599 | static int geneve_open(struct net_device *dev) |
600 | { | |
601 | struct geneve_dev *geneve = netdev_priv(dev); | |
602 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
603 | bool metadata = geneve->collect_md; | |
604 | int ret = 0; | |
605 | ||
606 | geneve->sock4 = NULL; | |
607 | #if IS_ENABLED(CONFIG_IPV6) | |
608 | geneve->sock6 = NULL; | |
609 | if (ipv6 || metadata) | |
610 | ret = geneve_sock_add(geneve, true); | |
611 | #endif | |
612 | if (!ret && (!ipv6 || metadata)) | |
613 | ret = geneve_sock_add(geneve, false); | |
614 | if (ret < 0) | |
615 | geneve_sock_release(geneve); | |
616 | ||
617 | return ret; | |
618 | } | |
619 | ||
2d07dc79 JL |
620 | static int geneve_stop(struct net_device *dev) |
621 | { | |
622 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 623 | |
66d47003 PS |
624 | if (!hlist_unhashed(&geneve->hlist)) |
625 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 626 | geneve_sock_release(geneve); |
371bd106 PS |
627 | return 0; |
628 | } | |
629 | ||
8ed66f0e JL |
630 | static void geneve_build_header(struct genevehdr *geneveh, |
631 | __be16 tun_flags, u8 vni[3], | |
632 | u8 options_len, u8 *options) | |
633 | { | |
634 | geneveh->ver = GENEVE_VER; | |
635 | geneveh->opt_len = options_len / 4; | |
636 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
637 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
638 | geneveh->rsvd1 = 0; | |
639 | memcpy(geneveh->vni, vni, 3); | |
640 | geneveh->proto_type = htons(ETH_P_TEB); | |
641 | geneveh->rsvd2 = 0; | |
642 | ||
643 | memcpy(geneveh->options, options, options_len); | |
644 | } | |
645 | ||
371bd106 PS |
646 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
647 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 648 | u32 flags, bool xnet) |
371bd106 PS |
649 | { |
650 | struct genevehdr *gnvh; | |
651 | int min_headroom; | |
652 | int err; | |
14f1f724 | 653 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX); |
2d07dc79 | 654 | |
8ed66f0e JL |
655 | skb_scrub_packet(skb, xnet); |
656 | ||
371bd106 PS |
657 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
658 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
659 | err = skb_cow_head(skb, min_headroom); | |
aed069df | 660 | if (unlikely(err)) |
371bd106 | 661 | goto free_rt; |
371bd106 | 662 | |
aed069df AD |
663 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
664 | if (err) | |
371bd106 | 665 | goto free_rt; |
371bd106 PS |
666 | |
667 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 668 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
669 | |
670 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 671 | return 0; |
371bd106 PS |
672 | |
673 | free_rt: | |
674 | ip_rt_put(rt); | |
675 | return err; | |
2d07dc79 JL |
676 | } |
677 | ||
8ed66f0e JL |
678 | #if IS_ENABLED(CONFIG_IPV6) |
679 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
680 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 681 | u32 flags, bool xnet) |
8ed66f0e JL |
682 | { |
683 | struct genevehdr *gnvh; | |
684 | int min_headroom; | |
685 | int err; | |
abe492b4 | 686 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
687 | |
688 | skb_scrub_packet(skb, xnet); | |
689 | ||
690 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
691 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
692 | err = skb_cow_head(skb, min_headroom); | |
aed069df | 693 | if (unlikely(err)) |
8ed66f0e | 694 | goto free_dst; |
8ed66f0e | 695 | |
aed069df | 696 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 697 | if (err) |
8ed66f0e | 698 | goto free_dst; |
8ed66f0e JL |
699 | |
700 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
701 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
702 | ||
703 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
704 | return 0; | |
705 | ||
706 | free_dst: | |
707 | dst_release(dst); | |
708 | return err; | |
709 | } | |
710 | #endif | |
711 | ||
712 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
713 | struct net_device *dev, | |
714 | struct flowi4 *fl4, | |
715 | struct ip_tunnel_info *info) | |
e305ac6c | 716 | { |
db3c6139 | 717 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 718 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 719 | struct dst_cache *dst_cache; |
e305ac6c PS |
720 | struct rtable *rt = NULL; |
721 | __u8 tos; | |
722 | ||
723 | memset(fl4, 0, sizeof(*fl4)); | |
724 | fl4->flowi4_mark = skb->mark; | |
725 | fl4->flowi4_proto = IPPROTO_UDP; | |
726 | ||
727 | if (info) { | |
728 | fl4->daddr = info->key.u.ipv4.dst; | |
729 | fl4->saddr = info->key.u.ipv4.src; | |
730 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
468dfffc | 731 | dst_cache = &info->dst_cache; |
e305ac6c PS |
732 | } else { |
733 | tos = geneve->tos; | |
734 | if (tos == 1) { | |
735 | const struct iphdr *iip = ip_hdr(skb); | |
736 | ||
737 | tos = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 738 | use_cache = false; |
e305ac6c PS |
739 | } |
740 | ||
741 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 742 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
468dfffc PA |
743 | dst_cache = &geneve->dst_cache; |
744 | } | |
745 | ||
468dfffc PA |
746 | if (use_cache) { |
747 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
748 | if (rt) | |
749 | return rt; | |
e305ac6c PS |
750 | } |
751 | ||
752 | rt = ip_route_output_key(geneve->net, fl4); | |
753 | if (IS_ERR(rt)) { | |
754 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 755 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
756 | } |
757 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
758 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 759 | ip_rt_put(rt); |
fc4099f1 | 760 | return ERR_PTR(-ELOOP); |
e305ac6c | 761 | } |
468dfffc PA |
762 | if (use_cache) |
763 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
764 | return rt; |
765 | } | |
766 | ||
8ed66f0e JL |
767 | #if IS_ENABLED(CONFIG_IPV6) |
768 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
769 | struct net_device *dev, | |
770 | struct flowi6 *fl6, | |
771 | struct ip_tunnel_info *info) | |
772 | { | |
db3c6139 | 773 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e JL |
774 | struct geneve_dev *geneve = netdev_priv(dev); |
775 | struct geneve_sock *gs6 = geneve->sock6; | |
776 | struct dst_entry *dst = NULL; | |
468dfffc | 777 | struct dst_cache *dst_cache; |
3a56f86f | 778 | __u8 prio; |
8ed66f0e JL |
779 | |
780 | memset(fl6, 0, sizeof(*fl6)); | |
781 | fl6->flowi6_mark = skb->mark; | |
782 | fl6->flowi6_proto = IPPROTO_UDP; | |
783 | ||
784 | if (info) { | |
785 | fl6->daddr = info->key.u.ipv6.dst; | |
786 | fl6->saddr = info->key.u.ipv6.src; | |
95caf6f7 DB |
787 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos), |
788 | info->key.label); | |
468dfffc | 789 | dst_cache = &info->dst_cache; |
8ed66f0e | 790 | } else { |
3a56f86f JL |
791 | prio = geneve->tos; |
792 | if (prio == 1) { | |
793 | const struct iphdr *iip = ip_hdr(skb); | |
794 | ||
795 | prio = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 796 | use_cache = false; |
3a56f86f JL |
797 | } |
798 | ||
95caf6f7 DB |
799 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
800 | geneve->label); | |
8ed66f0e | 801 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
468dfffc PA |
802 | dst_cache = &geneve->dst_cache; |
803 | } | |
804 | ||
468dfffc PA |
805 | if (use_cache) { |
806 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
807 | if (dst) | |
808 | return dst; | |
8ed66f0e JL |
809 | } |
810 | ||
811 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
812 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
813 | return ERR_PTR(-ENETUNREACH); | |
814 | } | |
815 | if (dst->dev == dev) { /* is this necessary? */ | |
816 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
817 | dst_release(dst); | |
818 | return ERR_PTR(-ELOOP); | |
819 | } | |
820 | ||
468dfffc PA |
821 | if (use_cache) |
822 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
823 | return dst; |
824 | } | |
825 | #endif | |
826 | ||
e305ac6c PS |
827 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
828 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
829 | { | |
830 | #ifdef __BIG_ENDIAN | |
831 | vni[0] = (__force __u8)(tun_id >> 16); | |
832 | vni[1] = (__force __u8)(tun_id >> 8); | |
833 | vni[2] = (__force __u8)tun_id; | |
834 | #else | |
835 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
836 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
837 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
838 | #endif | |
839 | } | |
840 | ||
8ed66f0e JL |
841 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
842 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
843 | { |
844 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 845 | struct geneve_sock *gs4 = geneve->sock4; |
2d07dc79 | 846 | struct rtable *rt = NULL; |
08399efc | 847 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 848 | int err = -EINVAL; |
2d07dc79 | 849 | struct flowi4 fl4; |
8760ce58 | 850 | __u8 tos, ttl; |
e305ac6c | 851 | __be16 sport; |
371bd106 | 852 | __be16 df; |
8ed66f0e | 853 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 854 | u32 flags = geneve->flags; |
2d07dc79 | 855 | |
e305ac6c | 856 | if (geneve->collect_md) { |
8ed66f0e | 857 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
858 | netdev_dbg(dev, "no tunnel metadata\n"); |
859 | goto tx_error; | |
860 | } | |
7f9562a1 JB |
861 | if (info && ip_tunnel_info_af(info) != AF_INET) |
862 | goto tx_error; | |
e305ac6c | 863 | } |
980c394c | 864 | |
8ed66f0e | 865 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 866 | if (IS_ERR(rt)) { |
fc4099f1 | 867 | err = PTR_ERR(rt); |
2d07dc79 JL |
868 | goto tx_error; |
869 | } | |
371bd106 PS |
870 | |
871 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 872 | skb_reset_mac_header(skb); |
e305ac6c | 873 | |
08399efc JL |
874 | iip = ip_hdr(skb); |
875 | ||
e305ac6c PS |
876 | if (info) { |
877 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
878 | u8 *opts = NULL; |
879 | u8 vni[3]; | |
e305ac6c PS |
880 | |
881 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 882 | if (info->options_len) |
4c222798 | 883 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 884 | |
abe492b4 | 885 | if (key->tun_flags & TUNNEL_CSUM) |
14f1f724 | 886 | flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 887 | else |
14f1f724 | 888 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 889 | |
371bd106 | 890 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 891 | info->options_len, opts, flags, xnet); |
371bd106 | 892 | if (unlikely(err)) |
aed069df | 893 | goto tx_error; |
371bd106 | 894 | |
08399efc | 895 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
896 | ttl = key->ttl; |
897 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 898 | } else { |
371bd106 | 899 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 900 | 0, NULL, flags, xnet); |
371bd106 | 901 | if (unlikely(err)) |
aed069df | 902 | goto tx_error; |
371bd106 | 903 | |
e305ac6c | 904 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
905 | ttl = geneve->ttl; |
906 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
907 | ttl = 1; | |
e305ac6c | 908 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 909 | df = 0; |
2d07dc79 | 910 | } |
039f5062 PS |
911 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
912 | tos, ttl, df, sport, geneve->dst_port, | |
913 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
14f1f724 | 914 | !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX)); |
2d07dc79 | 915 | |
2d07dc79 JL |
916 | return NETDEV_TX_OK; |
917 | ||
2d07dc79 | 918 | tx_error: |
2d07dc79 | 919 | dev_kfree_skb(skb); |
aed069df | 920 | |
fc4099f1 PS |
921 | if (err == -ELOOP) |
922 | dev->stats.collisions++; | |
923 | else if (err == -ENETUNREACH) | |
924 | dev->stats.tx_carrier_errors++; | |
925 | else | |
926 | dev->stats.tx_errors++; | |
2d07dc79 JL |
927 | return NETDEV_TX_OK; |
928 | } | |
929 | ||
8ed66f0e JL |
930 | #if IS_ENABLED(CONFIG_IPV6) |
931 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
932 | struct ip_tunnel_info *info) | |
933 | { | |
934 | struct geneve_dev *geneve = netdev_priv(dev); | |
935 | struct geneve_sock *gs6 = geneve->sock6; | |
936 | struct dst_entry *dst = NULL; | |
3a56f86f | 937 | const struct iphdr *iip; /* interior IP header */ |
8ed66f0e JL |
938 | int err = -EINVAL; |
939 | struct flowi6 fl6; | |
3a56f86f | 940 | __u8 prio, ttl; |
8ed66f0e | 941 | __be16 sport; |
8eb3b995 | 942 | __be32 label; |
8ed66f0e | 943 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 944 | u32 flags = geneve->flags; |
8ed66f0e JL |
945 | |
946 | if (geneve->collect_md) { | |
947 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
948 | netdev_dbg(dev, "no tunnel metadata\n"); | |
949 | goto tx_error; | |
950 | } | |
951 | } | |
952 | ||
953 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
954 | if (IS_ERR(dst)) { | |
955 | err = PTR_ERR(dst); | |
956 | goto tx_error; | |
957 | } | |
958 | ||
959 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
960 | skb_reset_mac_header(skb); | |
961 | ||
3a56f86f JL |
962 | iip = ip_hdr(skb); |
963 | ||
8ed66f0e JL |
964 | if (info) { |
965 | const struct ip_tunnel_key *key = &info->key; | |
966 | u8 *opts = NULL; | |
967 | u8 vni[3]; | |
968 | ||
969 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 970 | if (info->options_len) |
8ed66f0e JL |
971 | opts = ip_tunnel_info_opts(info); |
972 | ||
abe492b4 | 973 | if (key->tun_flags & TUNNEL_CSUM) |
35e2d115 | 974 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 975 | else |
35e2d115 | 976 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 977 | |
8ed66f0e JL |
978 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
979 | info->options_len, opts, | |
abe492b4 | 980 | flags, xnet); |
8ed66f0e | 981 | if (unlikely(err)) |
aed069df | 982 | goto tx_error; |
8ed66f0e | 983 | |
3a56f86f | 984 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e | 985 | ttl = key->ttl; |
8eb3b995 | 986 | label = info->key.label; |
8ed66f0e | 987 | } else { |
8ed66f0e | 988 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, |
abe492b4 | 989 | 0, NULL, flags, xnet); |
8ed66f0e | 990 | if (unlikely(err)) |
aed069df | 991 | goto tx_error; |
8ed66f0e | 992 | |
95caf6f7 DB |
993 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), |
994 | iip, skb); | |
8ed66f0e JL |
995 | ttl = geneve->ttl; |
996 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
997 | ttl = 1; | |
998 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
8eb3b995 | 999 | label = geneve->label; |
8ed66f0e | 1000 | } |
8eb3b995 | 1001 | |
039f5062 | 1002 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
8eb3b995 | 1003 | &fl6.saddr, &fl6.daddr, prio, ttl, label, |
039f5062 PS |
1004 | sport, geneve->dst_port, |
1005 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1006 | return NETDEV_TX_OK; |
1007 | ||
1008 | tx_error: | |
1009 | dev_kfree_skb(skb); | |
aed069df | 1010 | |
8ed66f0e JL |
1011 | if (err == -ELOOP) |
1012 | dev->stats.collisions++; | |
1013 | else if (err == -ENETUNREACH) | |
1014 | dev->stats.tx_carrier_errors++; | |
1015 | else | |
1016 | dev->stats.tx_errors++; | |
1017 | return NETDEV_TX_OK; | |
1018 | } | |
1019 | #endif | |
1020 | ||
1021 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1022 | { | |
1023 | struct geneve_dev *geneve = netdev_priv(dev); | |
1024 | struct ip_tunnel_info *info = NULL; | |
1025 | ||
1026 | if (geneve->collect_md) | |
1027 | info = skb_tunnel_info(skb); | |
1028 | ||
1029 | #if IS_ENABLED(CONFIG_IPV6) | |
1030 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1031 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1032 | return geneve6_xmit_skb(skb, dev, info); | |
1033 | #endif | |
1034 | return geneve_xmit_skb(skb, dev, info); | |
1035 | } | |
1036 | ||
aeee0e66 | 1037 | static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) |
55e5bfb5 | 1038 | { |
aeee0e66 DW |
1039 | /* The max_mtu calculation does not take account of GENEVE |
1040 | * options, to avoid excluding potentially valid | |
1041 | * configurations. | |
55e5bfb5 | 1042 | */ |
aeee0e66 DW |
1043 | int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - sizeof(struct iphdr) |
1044 | - dev->hard_header_len; | |
1045 | ||
1046 | if (new_mtu < 68) | |
55e5bfb5 | 1047 | return -EINVAL; |
aeee0e66 DW |
1048 | |
1049 | if (new_mtu > max_mtu) { | |
1050 | if (strict) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | new_mtu = max_mtu; | |
1054 | } | |
1055 | ||
55e5bfb5 DW |
1056 | dev->mtu = new_mtu; |
1057 | return 0; | |
1058 | } | |
1059 | ||
aeee0e66 DW |
1060 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
1061 | { | |
1062 | return __geneve_change_mtu(dev, new_mtu, true); | |
1063 | } | |
1064 | ||
fc4099f1 PS |
1065 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1066 | { | |
1067 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1068 | struct geneve_dev *geneve = netdev_priv(dev); | |
1069 | struct rtable *rt; | |
1070 | struct flowi4 fl4; | |
b8812fa8 JL |
1071 | #if IS_ENABLED(CONFIG_IPV6) |
1072 | struct dst_entry *dst; | |
1073 | struct flowi6 fl6; | |
1074 | #endif | |
fc4099f1 | 1075 | |
b8812fa8 JL |
1076 | if (ip_tunnel_info_af(info) == AF_INET) { |
1077 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1078 | if (IS_ERR(rt)) | |
1079 | return PTR_ERR(rt); | |
fc4099f1 | 1080 | |
b8812fa8 JL |
1081 | ip_rt_put(rt); |
1082 | info->key.u.ipv4.src = fl4.saddr; | |
1083 | #if IS_ENABLED(CONFIG_IPV6) | |
1084 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1085 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1086 | if (IS_ERR(dst)) | |
1087 | return PTR_ERR(dst); | |
1088 | ||
1089 | dst_release(dst); | |
1090 | info->key.u.ipv6.src = fl6.saddr; | |
1091 | #endif | |
1092 | } else { | |
1093 | return -EINVAL; | |
1094 | } | |
fc4099f1 | 1095 | |
fc4099f1 PS |
1096 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1097 | 1, USHRT_MAX, true); | |
1098 | info->key.tp_dst = geneve->dst_port; | |
1099 | return 0; | |
1100 | } | |
1101 | ||
2d07dc79 JL |
1102 | static const struct net_device_ops geneve_netdev_ops = { |
1103 | .ndo_init = geneve_init, | |
1104 | .ndo_uninit = geneve_uninit, | |
1105 | .ndo_open = geneve_open, | |
1106 | .ndo_stop = geneve_stop, | |
1107 | .ndo_start_xmit = geneve_xmit, | |
1108 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1109 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1110 | .ndo_validate_addr = eth_validate_addr, |
1111 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1112 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1113 | }; |
1114 | ||
1115 | static void geneve_get_drvinfo(struct net_device *dev, | |
1116 | struct ethtool_drvinfo *drvinfo) | |
1117 | { | |
1118 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1119 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1120 | } | |
1121 | ||
1122 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1123 | .get_drvinfo = geneve_get_drvinfo, | |
1124 | .get_link = ethtool_op_get_link, | |
1125 | }; | |
1126 | ||
1127 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1128 | static struct device_type geneve_type = { | |
1129 | .name = "geneve", | |
1130 | }; | |
1131 | ||
e7b3db5e | 1132 | /* Calls the ndo_add_udp_enc_port of the caller in order to |
05ca4029 | 1133 | * supply the listening GENEVE udp ports. Callers are expected |
e7b3db5e | 1134 | * to implement the ndo_add_udp_enc_port. |
05ca4029 | 1135 | */ |
681e683f | 1136 | static void geneve_push_rx_ports(struct net_device *dev) |
05ca4029 SA |
1137 | { |
1138 | struct net *net = dev_net(dev); | |
1139 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1140 | struct geneve_sock *gs; | |
681e683f | 1141 | |
05ca4029 | 1142 | rcu_read_lock(); |
e7b3db5e AD |
1143 | list_for_each_entry_rcu(gs, &gn->sock_list, list) |
1144 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1145 | UDP_TUNNEL_TYPE_GENEVE); | |
05ca4029 SA |
1146 | rcu_read_unlock(); |
1147 | } | |
05ca4029 | 1148 | |
2d07dc79 JL |
1149 | /* Initialize the device structure. */ |
1150 | static void geneve_setup(struct net_device *dev) | |
1151 | { | |
1152 | ether_setup(dev); | |
1153 | ||
1154 | dev->netdev_ops = &geneve_netdev_ops; | |
1155 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1156 | dev->destructor = free_netdev; | |
1157 | ||
1158 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1159 | ||
2d07dc79 JL |
1160 | dev->features |= NETIF_F_LLTX; |
1161 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1162 | dev->features |= NETIF_F_RXCSUM; | |
1163 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1164 | ||
2d07dc79 JL |
1165 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1166 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1167 | |
1168 | netif_keep_dst(dev); | |
fc41cdb3 | 1169 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1170 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1171 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1172 | } |
1173 | ||
1174 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1175 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1176 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1177 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1178 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1179 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1180 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1181 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1182 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1183 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1184 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1185 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1186 | }; |
1187 | ||
1188 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1189 | { | |
1190 | if (tb[IFLA_ADDRESS]) { | |
1191 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1192 | return -EINVAL; | |
1193 | ||
1194 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1195 | return -EADDRNOTAVAIL; | |
1196 | } | |
1197 | ||
1198 | if (!data) | |
1199 | return -EINVAL; | |
1200 | ||
1201 | if (data[IFLA_GENEVE_ID]) { | |
1202 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1203 | ||
1204 | if (vni >= GENEVE_VID_MASK) | |
1205 | return -ERANGE; | |
1206 | } | |
1207 | ||
1208 | return 0; | |
1209 | } | |
1210 | ||
371bd106 PS |
1211 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1212 | __be16 dst_port, | |
8ed66f0e | 1213 | union geneve_addr *remote, |
371bd106 PS |
1214 | u8 vni[], |
1215 | bool *tun_on_same_port, | |
1216 | bool *tun_collect_md) | |
1217 | { | |
1218 | struct geneve_dev *geneve, *t; | |
1219 | ||
1220 | *tun_on_same_port = false; | |
1221 | *tun_collect_md = false; | |
1222 | t = NULL; | |
1223 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1224 | if (geneve->dst_port == dst_port) { | |
1225 | *tun_collect_md = geneve->collect_md; | |
1226 | *tun_on_same_port = true; | |
1227 | } | |
1228 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1229 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1230 | dst_port == geneve->dst_port) |
1231 | t = geneve; | |
1232 | } | |
1233 | return t; | |
1234 | } | |
1235 | ||
e305ac6c | 1236 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e | 1237 | union geneve_addr *remote, |
8eb3b995 DB |
1238 | __u32 vni, __u8 ttl, __u8 tos, __be32 label, |
1239 | __be16 dst_port, bool metadata, u32 flags) | |
2d07dc79 JL |
1240 | { |
1241 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1242 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1243 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1244 | int err, encap_len; |
2d07dc79 | 1245 | |
8ed66f0e JL |
1246 | if (!remote) |
1247 | return -EINVAL; | |
1248 | if (metadata && | |
8eb3b995 | 1249 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label)) |
8ed66f0e | 1250 | return -EINVAL; |
2d07dc79 JL |
1251 | |
1252 | geneve->net = net; | |
1253 | geneve->dev = dev; | |
1254 | ||
2d07dc79 JL |
1255 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1256 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1257 | geneve->vni[2] = vni & 0x000000ff; | |
1258 | ||
8ed66f0e JL |
1259 | if ((remote->sa.sa_family == AF_INET && |
1260 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1261 | (remote->sa.sa_family == AF_INET6 && | |
1262 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1263 | return -EINVAL; |
8eb3b995 DB |
1264 | if (label && remote->sa.sa_family != AF_INET6) |
1265 | return -EINVAL; | |
1266 | ||
8ed66f0e | 1267 | geneve->remote = *remote; |
2d07dc79 | 1268 | |
e305ac6c PS |
1269 | geneve->ttl = ttl; |
1270 | geneve->tos = tos; | |
8eb3b995 | 1271 | geneve->label = label; |
7bbe33ff | 1272 | geneve->dst_port = dst_port; |
e305ac6c | 1273 | geneve->collect_md = metadata; |
abe492b4 | 1274 | geneve->flags = flags; |
e305ac6c | 1275 | |
8ed66f0e | 1276 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1277 | &tun_on_same_port, &tun_collect_md); |
1278 | if (t) | |
1279 | return -EBUSY; | |
1280 | ||
184fc8b5 PA |
1281 | /* make enough headroom for basic scenario */ |
1282 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1283 | if (remote->sa.sa_family == AF_INET) | |
1284 | encap_len += sizeof(struct iphdr); | |
1285 | else | |
1286 | encap_len += sizeof(struct ipv6hdr); | |
1287 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1288 | ||
371bd106 PS |
1289 | if (metadata) { |
1290 | if (tun_on_same_port) | |
1291 | return -EPERM; | |
1292 | } else { | |
1293 | if (tun_collect_md) | |
1294 | return -EPERM; | |
1295 | } | |
1296 | ||
468dfffc PA |
1297 | dst_cache_reset(&geneve->dst_cache); |
1298 | ||
2d07dc79 JL |
1299 | err = register_netdevice(dev); |
1300 | if (err) | |
1301 | return err; | |
1302 | ||
e305ac6c | 1303 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1304 | return 0; |
1305 | } | |
1306 | ||
1307 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1308 | struct nlattr *tb[], struct nlattr *data[]) | |
1309 | { | |
7bbe33ff | 1310 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1311 | __u8 ttl = 0, tos = 0; |
1312 | bool metadata = false; | |
8ed66f0e | 1313 | union geneve_addr remote = geneve_remote_unspec; |
8eb3b995 | 1314 | __be32 label = 0; |
e277de5f | 1315 | __u32 vni = 0; |
abe492b4 | 1316 | u32 flags = 0; |
e305ac6c | 1317 | |
8ed66f0e JL |
1318 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1319 | return -EINVAL; | |
1320 | ||
1321 | if (data[IFLA_GENEVE_REMOTE]) { | |
1322 | remote.sa.sa_family = AF_INET; | |
1323 | remote.sin.sin_addr.s_addr = | |
1324 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1325 | } | |
1326 | ||
1327 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1328 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1329 | return -EPFNOSUPPORT; | |
1330 | ||
1331 | remote.sa.sa_family = AF_INET6; | |
1332 | remote.sin6.sin6_addr = | |
1333 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1334 | ||
1335 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1336 | IPV6_ADDR_LINKLOCAL) { | |
1337 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1338 | return -EINVAL; | |
1339 | } | |
1340 | } | |
1341 | ||
e277de5f JG |
1342 | if (data[IFLA_GENEVE_ID]) |
1343 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1344 | |
8760ce58 | 1345 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1346 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1347 | |
d8951125 | 1348 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1349 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1350 | |
8eb3b995 DB |
1351 | if (data[IFLA_GENEVE_LABEL]) |
1352 | label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1353 | IPV6_FLOWLABEL_MASK; | |
1354 | ||
e305ac6c | 1355 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1356 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1357 | |
e305ac6c PS |
1358 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1359 | metadata = true; | |
2d07dc79 | 1360 | |
abe492b4 | 1361 | if (data[IFLA_GENEVE_UDP_CSUM] && |
14f1f724 AD |
1362 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1363 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; | |
abe492b4 TH |
1364 | |
1365 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1366 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1367 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1368 | ||
1369 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1370 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1371 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1372 | ||
8eb3b995 DB |
1373 | return geneve_configure(net, dev, &remote, vni, ttl, tos, label, |
1374 | dst_port, metadata, flags); | |
2d07dc79 JL |
1375 | } |
1376 | ||
1377 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1378 | { | |
1379 | struct geneve_dev *geneve = netdev_priv(dev); | |
1380 | ||
2d07dc79 JL |
1381 | list_del(&geneve->next); |
1382 | unregister_netdevice_queue(dev, head); | |
1383 | } | |
1384 | ||
1385 | static size_t geneve_get_size(const struct net_device *dev) | |
1386 | { | |
1387 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1388 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1389 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1390 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
8eb3b995 | 1391 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1392 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1393 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1394 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1395 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1396 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1397 | 0; |
1398 | } | |
1399 | ||
1400 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1401 | { | |
1402 | struct geneve_dev *geneve = netdev_priv(dev); | |
1403 | __u32 vni; | |
1404 | ||
1405 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1406 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1407 | goto nla_put_failure; | |
1408 | ||
8ed66f0e JL |
1409 | if (geneve->remote.sa.sa_family == AF_INET) { |
1410 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1411 | geneve->remote.sin.sin_addr.s_addr)) | |
1412 | goto nla_put_failure; | |
1413 | #if IS_ENABLED(CONFIG_IPV6) | |
1414 | } else { | |
1415 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1416 | &geneve->remote.sin6.sin6_addr)) | |
1417 | goto nla_put_failure; | |
1418 | #endif | |
1419 | } | |
2d07dc79 | 1420 | |
d8951125 | 1421 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
8eb3b995 DB |
1422 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) || |
1423 | nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label)) | |
8760ce58 JL |
1424 | goto nla_put_failure; |
1425 | ||
7bbe33ff | 1426 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1427 | goto nla_put_failure; |
1428 | ||
e305ac6c PS |
1429 | if (geneve->collect_md) { |
1430 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1431 | goto nla_put_failure; | |
1432 | } | |
1433 | ||
abe492b4 | 1434 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
14f1f724 | 1435 | !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) || |
abe492b4 TH |
1436 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1437 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1438 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1439 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1440 | goto nla_put_failure; | |
1441 | ||
2d07dc79 JL |
1442 | return 0; |
1443 | ||
1444 | nla_put_failure: | |
1445 | return -EMSGSIZE; | |
1446 | } | |
1447 | ||
1448 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1449 | .kind = "geneve", | |
1450 | .maxtype = IFLA_GENEVE_MAX, | |
1451 | .policy = geneve_policy, | |
1452 | .priv_size = sizeof(struct geneve_dev), | |
1453 | .setup = geneve_setup, | |
1454 | .validate = geneve_validate, | |
1455 | .newlink = geneve_newlink, | |
1456 | .dellink = geneve_dellink, | |
1457 | .get_size = geneve_get_size, | |
1458 | .fill_info = geneve_fill_info, | |
1459 | }; | |
1460 | ||
e305ac6c PS |
1461 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1462 | u8 name_assign_type, u16 dst_port) | |
1463 | { | |
1464 | struct nlattr *tb[IFLA_MAX + 1]; | |
1465 | struct net_device *dev; | |
1466 | int err; | |
1467 | ||
1468 | memset(tb, 0, sizeof(tb)); | |
1469 | dev = rtnl_create_link(net, name, name_assign_type, | |
1470 | &geneve_link_ops, tb); | |
1471 | if (IS_ERR(dev)) | |
1472 | return dev; | |
1473 | ||
8ed66f0e | 1474 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
8eb3b995 | 1475 | 0, 0, 0, 0, htons(dst_port), true, |
c868ee70 | 1476 | GENEVE_F_UDP_ZERO_CSUM6_RX); |
7e059158 DW |
1477 | if (err) |
1478 | goto err; | |
1479 | ||
1480 | /* openvswitch users expect packet sizes to be unrestricted, | |
1481 | * so set the largest MTU we can. | |
1482 | */ | |
aeee0e66 | 1483 | err = __geneve_change_mtu(dev, IP_MAX_MTU, false); |
7e059158 DW |
1484 | if (err) |
1485 | goto err; | |
1486 | ||
e305ac6c | 1487 | return dev; |
7e059158 DW |
1488 | |
1489 | err: | |
1490 | free_netdev(dev); | |
1491 | return ERR_PTR(err); | |
e305ac6c PS |
1492 | } |
1493 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1494 | ||
681e683f HFS |
1495 | static int geneve_netdevice_event(struct notifier_block *unused, |
1496 | unsigned long event, void *ptr) | |
1497 | { | |
1498 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1499 | ||
7c46a640 | 1500 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
681e683f HFS |
1501 | geneve_push_rx_ports(dev); |
1502 | ||
1503 | return NOTIFY_DONE; | |
1504 | } | |
1505 | ||
1506 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1507 | .notifier_call = geneve_netdevice_event, | |
1508 | }; | |
1509 | ||
2d07dc79 JL |
1510 | static __net_init int geneve_init_net(struct net *net) |
1511 | { | |
1512 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1513 | |
1514 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1515 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1516 | return 0; |
1517 | } | |
1518 | ||
1519 | static void __net_exit geneve_exit_net(struct net *net) | |
1520 | { | |
1521 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1522 | struct geneve_dev *geneve, *next; | |
1523 | struct net_device *dev, *aux; | |
1524 | LIST_HEAD(list); | |
1525 | ||
1526 | rtnl_lock(); | |
1527 | ||
1528 | /* gather any geneve devices that were moved into this ns */ | |
1529 | for_each_netdev_safe(net, dev, aux) | |
1530 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1531 | unregister_netdevice_queue(dev, &list); | |
1532 | ||
1533 | /* now gather any other geneve devices that were created in this ns */ | |
1534 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1535 | /* If geneve->dev is in the same netns, it was already added | |
1536 | * to the list by the previous loop. | |
1537 | */ | |
1538 | if (!net_eq(dev_net(geneve->dev), net)) | |
1539 | unregister_netdevice_queue(geneve->dev, &list); | |
1540 | } | |
1541 | ||
1542 | /* unregister the devices gathered above */ | |
1543 | unregister_netdevice_many(&list); | |
1544 | rtnl_unlock(); | |
1545 | } | |
1546 | ||
1547 | static struct pernet_operations geneve_net_ops = { | |
1548 | .init = geneve_init_net, | |
1549 | .exit = geneve_exit_net, | |
1550 | .id = &geneve_net_id, | |
1551 | .size = sizeof(struct geneve_net), | |
1552 | }; | |
1553 | ||
1554 | static int __init geneve_init_module(void) | |
1555 | { | |
1556 | int rc; | |
1557 | ||
1558 | rc = register_pernet_subsys(&geneve_net_ops); | |
1559 | if (rc) | |
1560 | goto out1; | |
1561 | ||
681e683f | 1562 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1563 | if (rc) |
1564 | goto out2; | |
1565 | ||
681e683f HFS |
1566 | rc = rtnl_link_register(&geneve_link_ops); |
1567 | if (rc) | |
1568 | goto out3; | |
1569 | ||
2d07dc79 | 1570 | return 0; |
681e683f HFS |
1571 | |
1572 | out3: | |
1573 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1574 | out2: |
1575 | unregister_pernet_subsys(&geneve_net_ops); | |
1576 | out1: | |
1577 | return rc; | |
1578 | } | |
1579 | late_initcall(geneve_init_module); | |
1580 | ||
1581 | static void __exit geneve_cleanup_module(void) | |
1582 | { | |
1583 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1584 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1585 | unregister_pernet_subsys(&geneve_net_ops); |
1586 | } | |
1587 | module_exit(geneve_cleanup_module); | |
1588 | ||
1589 | MODULE_LICENSE("GPL"); | |
1590 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1591 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1592 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1593 | MODULE_ALIAS_RTNL_LINK("geneve"); |