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 */ |
8eb3b995 | 71 | __be32 label; /* IPv6 flowlabel override */ |
cd7918b3 | 72 | __be16 dst_port; |
e305ac6c | 73 | bool collect_md; |
8e816df8 | 74 | struct gro_cells gro_cells; |
abe492b4 | 75 | u32 flags; |
468dfffc | 76 | struct dst_cache dst_cache; |
2d07dc79 JL |
77 | }; |
78 | ||
abe492b4 | 79 | /* Geneve device flags */ |
14f1f724 | 80 | #define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0) |
abe492b4 TH |
81 | #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1) |
82 | #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2) | |
83 | ||
371bd106 PS |
84 | struct geneve_sock { |
85 | bool collect_md; | |
371bd106 PS |
86 | struct list_head list; |
87 | struct socket *sock; | |
88 | struct rcu_head rcu; | |
89 | int refcnt; | |
90 | struct udp_offload udp_offloads; | |
66d47003 | 91 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
abe492b4 | 92 | u32 flags; |
371bd106 | 93 | }; |
2d07dc79 JL |
94 | |
95 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
96 | { | |
97 | __u32 vnid; | |
98 | ||
99 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
100 | return hash_32(vnid, VNI_HASH_BITS); | |
101 | } | |
102 | ||
e305ac6c PS |
103 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
104 | { | |
105 | #ifdef __BIG_ENDIAN | |
106 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
107 | #else | |
108 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
109 | ((__force u64)vni[1] << 48) | | |
110 | ((__force u64)vni[2] << 56)); | |
111 | #endif | |
112 | } | |
113 | ||
1e9f12ec JB |
114 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
115 | { | |
116 | return gs->sock->sk->sk_family; | |
117 | } | |
118 | ||
66d47003 | 119 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 120 | __be32 addr, u8 vni[]) |
2d07dc79 | 121 | { |
2d07dc79 | 122 | struct hlist_head *vni_list_head; |
e305ac6c | 123 | struct geneve_dev *geneve; |
2d07dc79 JL |
124 | __u32 hash; |
125 | ||
2d07dc79 | 126 | /* Find the device for this VNI */ |
371bd106 | 127 | hash = geneve_net_vni_hash(vni); |
66d47003 | 128 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 129 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
371bd106 | 130 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && |
8ed66f0e JL |
131 | addr == geneve->remote.sin.sin_addr.s_addr) |
132 | return geneve; | |
133 | } | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | #if IS_ENABLED(CONFIG_IPV6) | |
138 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
139 | struct in6_addr addr6, u8 vni[]) | |
140 | { | |
141 | struct hlist_head *vni_list_head; | |
142 | struct geneve_dev *geneve; | |
143 | __u32 hash; | |
144 | ||
145 | /* Find the device for this VNI */ | |
146 | hash = geneve_net_vni_hash(vni); | |
147 | vni_list_head = &gs->vni_list[hash]; | |
148 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
149 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
150 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e305ac6c | 151 | return geneve; |
2d07dc79 | 152 | } |
e305ac6c PS |
153 | return NULL; |
154 | } | |
8ed66f0e | 155 | #endif |
e305ac6c | 156 | |
371bd106 PS |
157 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
158 | { | |
159 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
160 | } | |
161 | ||
9fc47545 JB |
162 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
163 | struct sk_buff *skb) | |
e305ac6c | 164 | { |
9fc47545 | 165 | u8 *vni; |
371bd106 | 166 | __be32 addr; |
8ed66f0e | 167 | static u8 zero_vni[3]; |
8ed66f0e | 168 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
169 | static struct in6_addr zero_addr6; |
170 | #endif | |
e305ac6c | 171 | |
1e9f12ec | 172 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 JB |
173 | struct iphdr *iph; |
174 | ||
8ed66f0e | 175 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 176 | |
8ed66f0e JL |
177 | if (gs->collect_md) { |
178 | vni = zero_vni; | |
179 | addr = 0; | |
180 | } else { | |
9fc47545 | 181 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
182 | addr = iph->saddr; |
183 | } | |
184 | ||
9fc47545 | 185 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 186 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 187 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9fc47545 JB |
188 | struct ipv6hdr *ip6h; |
189 | struct in6_addr addr6; | |
190 | ||
8ed66f0e | 191 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 192 | |
8ed66f0e JL |
193 | if (gs->collect_md) { |
194 | vni = zero_vni; | |
195 | addr6 = zero_addr6; | |
196 | } else { | |
9fc47545 | 197 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
198 | addr6 = ip6h->saddr; |
199 | } | |
200 | ||
9fc47545 | 201 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
202 | #endif |
203 | } | |
9fc47545 JB |
204 | return NULL; |
205 | } | |
206 | ||
207 | /* geneve receive/decap routine */ | |
208 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
209 | struct sk_buff *skb) | |
210 | { | |
211 | struct genevehdr *gnvh = geneve_hdr(skb); | |
212 | struct metadata_dst *tun_dst = NULL; | |
213 | struct pcpu_sw_netstats *stats; | |
214 | int err = 0; | |
215 | void *oiph; | |
2d07dc79 | 216 | |
371bd106 | 217 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 218 | __be16 flags; |
e305ac6c PS |
219 | |
220 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
221 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
222 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
223 | ||
1e9f12ec | 224 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
225 | vni_to_tunnel_id(gnvh->vni), |
226 | gnvh->opt_len * 4); | |
227 | if (!tun_dst) | |
228 | goto drop; | |
e305ac6c | 229 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
230 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
231 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
232 | } else { |
233 | /* Drop packets w/ critical options, | |
234 | * since we don't support any... | |
235 | */ | |
236 | if (gnvh->critical) | |
237 | goto drop; | |
238 | } | |
2d07dc79 JL |
239 | |
240 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
241 | skb->protocol = eth_type_trans(skb, geneve->dev); |
242 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
243 | ||
e305ac6c PS |
244 | if (tun_dst) |
245 | skb_dst_set(skb, &tun_dst->dst); | |
246 | ||
2d07dc79 JL |
247 | /* Ignore packet loops (and multicast echo) */ |
248 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
249 | goto drop; | |
250 | ||
9fc47545 | 251 | oiph = skb_network_header(skb); |
2d07dc79 JL |
252 | skb_reset_network_header(skb); |
253 | ||
9fc47545 JB |
254 | if (geneve_get_sk_family(gs) == AF_INET) |
255 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 256 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
257 | else |
258 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 259 | #endif |
2d07dc79 JL |
260 | |
261 | if (unlikely(err)) { | |
8ed66f0e | 262 | if (log_ecn_error) { |
9fc47545 | 263 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
264 | net_info_ratelimited("non-ECT from %pI4 " |
265 | "with TOS=%#x\n", | |
9fc47545 JB |
266 | &((struct iphdr *)oiph)->saddr, |
267 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 268 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 269 | else |
8ed66f0e | 270 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 271 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
272 | #endif |
273 | } | |
2d07dc79 JL |
274 | if (err > 1) { |
275 | ++geneve->dev->stats.rx_frame_errors; | |
276 | ++geneve->dev->stats.rx_errors; | |
277 | goto drop; | |
278 | } | |
279 | } | |
280 | ||
281 | stats = this_cpu_ptr(geneve->dev->tstats); | |
282 | u64_stats_update_begin(&stats->syncp); | |
283 | stats->rx_packets++; | |
284 | stats->rx_bytes += skb->len; | |
285 | u64_stats_update_end(&stats->syncp); | |
286 | ||
8e816df8 | 287 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
288 | return; |
289 | drop: | |
290 | /* Consume bad packet */ | |
291 | kfree_skb(skb); | |
292 | } | |
293 | ||
294 | /* Setup stats when device is created */ | |
295 | static int geneve_init(struct net_device *dev) | |
296 | { | |
8e816df8 JG |
297 | struct geneve_dev *geneve = netdev_priv(dev); |
298 | int err; | |
299 | ||
2d07dc79 JL |
300 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
301 | if (!dev->tstats) | |
302 | return -ENOMEM; | |
8e816df8 JG |
303 | |
304 | err = gro_cells_init(&geneve->gro_cells, dev); | |
305 | if (err) { | |
306 | free_percpu(dev->tstats); | |
307 | return err; | |
308 | } | |
309 | ||
468dfffc PA |
310 | err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL); |
311 | if (err) { | |
312 | free_percpu(dev->tstats); | |
313 | gro_cells_destroy(&geneve->gro_cells); | |
314 | return err; | |
315 | } | |
316 | ||
2d07dc79 JL |
317 | return 0; |
318 | } | |
319 | ||
320 | static void geneve_uninit(struct net_device *dev) | |
321 | { | |
8e816df8 JG |
322 | struct geneve_dev *geneve = netdev_priv(dev); |
323 | ||
468dfffc | 324 | dst_cache_destroy(&geneve->dst_cache); |
8e816df8 | 325 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
326 | free_percpu(dev->tstats); |
327 | } | |
328 | ||
371bd106 PS |
329 | /* Callback from net/ipv4/udp.c to receive packets */ |
330 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
331 | { | |
332 | struct genevehdr *geneveh; | |
9fc47545 | 333 | struct geneve_dev *geneve; |
371bd106 PS |
334 | struct geneve_sock *gs; |
335 | int opts_len; | |
336 | ||
337 | /* Need Geneve and inner Ethernet header to be present */ | |
338 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
339 | goto error; | |
340 | ||
341 | /* Return packets with reserved bits set */ | |
342 | geneveh = geneve_hdr(skb); | |
343 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
344 | goto error; | |
345 | ||
346 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
347 | goto error; | |
348 | ||
9fc47545 JB |
349 | gs = rcu_dereference_sk_user_data(sk); |
350 | if (!gs) | |
351 | goto drop; | |
352 | ||
353 | geneve = geneve_lookup_skb(gs, skb); | |
354 | if (!geneve) | |
355 | goto drop; | |
356 | ||
371bd106 PS |
357 | opts_len = geneveh->opt_len * 4; |
358 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 JB |
359 | htons(ETH_P_TEB), |
360 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
371bd106 PS |
361 | goto drop; |
362 | ||
9fc47545 | 363 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
364 | return 0; |
365 | ||
366 | drop: | |
367 | /* Consume bad packet */ | |
368 | kfree_skb(skb); | |
369 | return 0; | |
370 | ||
371 | error: | |
372 | /* Let the UDP layer deal with the skb */ | |
373 | return 1; | |
374 | } | |
375 | ||
376 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
abe492b4 | 377 | __be16 port, u32 flags) |
371bd106 PS |
378 | { |
379 | struct socket *sock; | |
380 | struct udp_port_cfg udp_conf; | |
381 | int err; | |
382 | ||
383 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
384 | ||
385 | if (ipv6) { | |
386 | udp_conf.family = AF_INET6; | |
8ed66f0e | 387 | udp_conf.ipv6_v6only = 1; |
abe492b4 TH |
388 | udp_conf.use_udp6_rx_checksums = |
389 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
371bd106 PS |
390 | } else { |
391 | udp_conf.family = AF_INET; | |
392 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
393 | } | |
394 | ||
395 | udp_conf.local_udp_port = port; | |
396 | ||
397 | /* Open UDP socket */ | |
398 | err = udp_sock_create(net, &udp_conf, &sock); | |
399 | if (err < 0) | |
400 | return ERR_PTR(err); | |
401 | ||
402 | return sock; | |
403 | } | |
404 | ||
405 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) | |
406 | { | |
a8170d2b | 407 | struct net_device *dev; |
371bd106 | 408 | struct sock *sk = gs->sock->sk; |
a8170d2b | 409 | struct net *net = sock_net(sk); |
1e9f12ec | 410 | sa_family_t sa_family = geneve_get_sk_family(gs); |
a8170d2b | 411 | __be16 port = inet_sk(sk)->inet_sport; |
371bd106 PS |
412 | int err; |
413 | ||
414 | if (sa_family == AF_INET) { | |
787d7ac3 | 415 | err = udp_add_offload(sock_net(sk), &gs->udp_offloads); |
371bd106 PS |
416 | if (err) |
417 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
418 | err); | |
419 | } | |
a8170d2b SA |
420 | |
421 | rcu_read_lock(); | |
422 | for_each_netdev_rcu(net, dev) { | |
423 | if (dev->netdev_ops->ndo_add_geneve_port) | |
424 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, | |
425 | port); | |
426 | } | |
427 | rcu_read_unlock(); | |
371bd106 PS |
428 | } |
429 | ||
430 | static int geneve_hlen(struct genevehdr *gh) | |
431 | { | |
432 | return sizeof(*gh) + gh->opt_len * 4; | |
433 | } | |
434 | ||
435 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
436 | struct sk_buff *skb, | |
437 | struct udp_offload *uoff) | |
438 | { | |
439 | struct sk_buff *p, **pp = NULL; | |
440 | struct genevehdr *gh, *gh2; | |
441 | unsigned int hlen, gh_len, off_gnv; | |
442 | const struct packet_offload *ptype; | |
443 | __be16 type; | |
444 | int flush = 1; | |
445 | ||
446 | off_gnv = skb_gro_offset(skb); | |
447 | hlen = off_gnv + sizeof(*gh); | |
448 | gh = skb_gro_header_fast(skb, off_gnv); | |
449 | if (skb_gro_header_hard(skb, hlen)) { | |
450 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
451 | if (unlikely(!gh)) | |
452 | goto out; | |
453 | } | |
454 | ||
455 | if (gh->ver != GENEVE_VER || gh->oam) | |
456 | goto out; | |
457 | gh_len = geneve_hlen(gh); | |
458 | ||
459 | hlen = off_gnv + gh_len; | |
460 | if (skb_gro_header_hard(skb, hlen)) { | |
461 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
462 | if (unlikely(!gh)) | |
463 | goto out; | |
464 | } | |
465 | ||
371bd106 PS |
466 | for (p = *head; p; p = p->next) { |
467 | if (!NAPI_GRO_CB(p)->same_flow) | |
468 | continue; | |
469 | ||
470 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
471 | if (gh->opt_len != gh2->opt_len || | |
472 | memcmp(gh, gh2, gh_len)) { | |
473 | NAPI_GRO_CB(p)->same_flow = 0; | |
474 | continue; | |
475 | } | |
476 | } | |
477 | ||
478 | type = gh->proto_type; | |
479 | ||
480 | rcu_read_lock(); | |
481 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 482 | if (!ptype) |
371bd106 | 483 | goto out_unlock; |
371bd106 PS |
484 | |
485 | skb_gro_pull(skb, gh_len); | |
486 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
487 | pp = ptype->callbacks.gro_receive(head, skb); | |
c194cf93 | 488 | flush = 0; |
371bd106 PS |
489 | |
490 | out_unlock: | |
491 | rcu_read_unlock(); | |
492 | out: | |
493 | NAPI_GRO_CB(skb)->flush |= flush; | |
494 | ||
495 | return pp; | |
496 | } | |
497 | ||
498 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
499 | struct udp_offload *uoff) | |
500 | { | |
501 | struct genevehdr *gh; | |
502 | struct packet_offload *ptype; | |
503 | __be16 type; | |
504 | int gh_len; | |
505 | int err = -ENOSYS; | |
506 | ||
507 | udp_tunnel_gro_complete(skb, nhoff); | |
508 | ||
509 | gh = (struct genevehdr *)(skb->data + nhoff); | |
510 | gh_len = geneve_hlen(gh); | |
511 | type = gh->proto_type; | |
512 | ||
513 | rcu_read_lock(); | |
514 | ptype = gro_find_complete_by_type(type); | |
515 | if (ptype) | |
516 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
517 | ||
518 | rcu_read_unlock(); | |
519 | return err; | |
520 | } | |
521 | ||
522 | /* Create new listen socket if needed */ | |
523 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
abe492b4 | 524 | bool ipv6, u32 flags) |
371bd106 PS |
525 | { |
526 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
527 | struct geneve_sock *gs; | |
528 | struct socket *sock; | |
529 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 530 | int h; |
371bd106 PS |
531 | |
532 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
533 | if (!gs) | |
534 | return ERR_PTR(-ENOMEM); | |
535 | ||
abe492b4 | 536 | sock = geneve_create_sock(net, ipv6, port, flags); |
371bd106 PS |
537 | if (IS_ERR(sock)) { |
538 | kfree(gs); | |
539 | return ERR_CAST(sock); | |
540 | } | |
541 | ||
542 | gs->sock = sock; | |
543 | gs->refcnt = 1; | |
66d47003 PS |
544 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
545 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
546 | |
547 | /* Initialize the geneve udp offloads structure */ | |
548 | gs->udp_offloads.port = port; | |
549 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
550 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
551 | geneve_notify_add_rx_port(gs); | |
552 | ||
553 | /* Mark socket as an encapsulation socket */ | |
554 | tunnel_cfg.sk_user_data = gs; | |
555 | tunnel_cfg.encap_type = 1; | |
556 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; | |
557 | tunnel_cfg.encap_destroy = NULL; | |
558 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
559 | list_add(&gs->list, &gn->sock_list); |
560 | return gs; | |
561 | } | |
562 | ||
563 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
564 | { | |
a8170d2b | 565 | struct net_device *dev; |
371bd106 | 566 | struct sock *sk = gs->sock->sk; |
a8170d2b | 567 | struct net *net = sock_net(sk); |
1e9f12ec | 568 | sa_family_t sa_family = geneve_get_sk_family(gs); |
a8170d2b SA |
569 | __be16 port = inet_sk(sk)->inet_sport; |
570 | ||
571 | rcu_read_lock(); | |
572 | for_each_netdev_rcu(net, dev) { | |
573 | if (dev->netdev_ops->ndo_del_geneve_port) | |
574 | dev->netdev_ops->ndo_del_geneve_port(dev, sa_family, | |
575 | port); | |
576 | } | |
577 | ||
578 | rcu_read_unlock(); | |
371bd106 PS |
579 | |
580 | if (sa_family == AF_INET) | |
581 | udp_del_offload(&gs->udp_offloads); | |
582 | } | |
583 | ||
8ed66f0e | 584 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 585 | { |
8ed66f0e | 586 | if (!gs || --gs->refcnt) |
371bd106 PS |
587 | return; |
588 | ||
589 | list_del(&gs->list); | |
590 | geneve_notify_del_rx_port(gs); | |
591 | udp_tunnel_sock_release(gs->sock); | |
592 | kfree_rcu(gs, rcu); | |
593 | } | |
594 | ||
8ed66f0e JL |
595 | static void geneve_sock_release(struct geneve_dev *geneve) |
596 | { | |
597 | __geneve_sock_release(geneve->sock4); | |
598 | #if IS_ENABLED(CONFIG_IPV6) | |
599 | __geneve_sock_release(geneve->sock6); | |
600 | #endif | |
601 | } | |
602 | ||
371bd106 | 603 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 604 | sa_family_t family, |
371bd106 PS |
605 | __be16 dst_port) |
606 | { | |
607 | struct geneve_sock *gs; | |
608 | ||
609 | list_for_each_entry(gs, &gn->sock_list, list) { | |
610 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 611 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
612 | return gs; |
613 | } | |
614 | } | |
615 | return NULL; | |
616 | } | |
617 | ||
8ed66f0e | 618 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 619 | { |
2d07dc79 | 620 | struct net *net = geneve->net; |
371bd106 | 621 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 622 | struct geneve_sock *gs; |
66d47003 | 623 | __u32 hash; |
2d07dc79 | 624 | |
8ed66f0e | 625 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
626 | if (gs) { |
627 | gs->refcnt++; | |
628 | goto out; | |
629 | } | |
630 | ||
abe492b4 | 631 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
632 | if (IS_ERR(gs)) |
633 | return PTR_ERR(gs); | |
634 | ||
371bd106 PS |
635 | out: |
636 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 637 | gs->flags = geneve->flags; |
8ed66f0e JL |
638 | #if IS_ENABLED(CONFIG_IPV6) |
639 | if (ipv6) | |
640 | geneve->sock6 = gs; | |
641 | else | |
642 | #endif | |
643 | geneve->sock4 = gs; | |
66d47003 PS |
644 | |
645 | hash = geneve_net_vni_hash(geneve->vni); | |
646 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
647 | return 0; |
648 | } | |
649 | ||
8ed66f0e JL |
650 | static int geneve_open(struct net_device *dev) |
651 | { | |
652 | struct geneve_dev *geneve = netdev_priv(dev); | |
653 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
654 | bool metadata = geneve->collect_md; | |
655 | int ret = 0; | |
656 | ||
657 | geneve->sock4 = NULL; | |
658 | #if IS_ENABLED(CONFIG_IPV6) | |
659 | geneve->sock6 = NULL; | |
660 | if (ipv6 || metadata) | |
661 | ret = geneve_sock_add(geneve, true); | |
662 | #endif | |
663 | if (!ret && (!ipv6 || metadata)) | |
664 | ret = geneve_sock_add(geneve, false); | |
665 | if (ret < 0) | |
666 | geneve_sock_release(geneve); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
2d07dc79 JL |
671 | static int geneve_stop(struct net_device *dev) |
672 | { | |
673 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 674 | |
66d47003 PS |
675 | if (!hlist_unhashed(&geneve->hlist)) |
676 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 677 | geneve_sock_release(geneve); |
371bd106 PS |
678 | return 0; |
679 | } | |
680 | ||
8ed66f0e JL |
681 | static void geneve_build_header(struct genevehdr *geneveh, |
682 | __be16 tun_flags, u8 vni[3], | |
683 | u8 options_len, u8 *options) | |
684 | { | |
685 | geneveh->ver = GENEVE_VER; | |
686 | geneveh->opt_len = options_len / 4; | |
687 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
688 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
689 | geneveh->rsvd1 = 0; | |
690 | memcpy(geneveh->vni, vni, 3); | |
691 | geneveh->proto_type = htons(ETH_P_TEB); | |
692 | geneveh->rsvd2 = 0; | |
693 | ||
694 | memcpy(geneveh->options, options, options_len); | |
695 | } | |
696 | ||
371bd106 PS |
697 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
698 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 699 | u32 flags, bool xnet) |
371bd106 PS |
700 | { |
701 | struct genevehdr *gnvh; | |
702 | int min_headroom; | |
703 | int err; | |
14f1f724 | 704 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX); |
2d07dc79 | 705 | |
8ed66f0e JL |
706 | skb_scrub_packet(skb, xnet); |
707 | ||
371bd106 PS |
708 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
709 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
710 | err = skb_cow_head(skb, min_headroom); | |
711 | if (unlikely(err)) { | |
712 | kfree_skb(skb); | |
713 | goto free_rt; | |
714 | } | |
715 | ||
abe492b4 | 716 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
371bd106 PS |
717 | if (IS_ERR(skb)) { |
718 | err = PTR_ERR(skb); | |
719 | goto free_rt; | |
720 | } | |
721 | ||
722 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 723 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
724 | |
725 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 726 | return 0; |
371bd106 PS |
727 | |
728 | free_rt: | |
729 | ip_rt_put(rt); | |
730 | return err; | |
2d07dc79 JL |
731 | } |
732 | ||
8ed66f0e JL |
733 | #if IS_ENABLED(CONFIG_IPV6) |
734 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
735 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 736 | u32 flags, bool xnet) |
8ed66f0e JL |
737 | { |
738 | struct genevehdr *gnvh; | |
739 | int min_headroom; | |
740 | int err; | |
abe492b4 | 741 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
742 | |
743 | skb_scrub_packet(skb, xnet); | |
744 | ||
745 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
746 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
747 | err = skb_cow_head(skb, min_headroom); | |
748 | if (unlikely(err)) { | |
749 | kfree_skb(skb); | |
750 | goto free_dst; | |
751 | } | |
752 | ||
abe492b4 | 753 | skb = udp_tunnel_handle_offloads(skb, udp_sum); |
8ed66f0e JL |
754 | if (IS_ERR(skb)) { |
755 | err = PTR_ERR(skb); | |
756 | goto free_dst; | |
757 | } | |
758 | ||
759 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
760 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
761 | ||
762 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
763 | return 0; | |
764 | ||
765 | free_dst: | |
766 | dst_release(dst); | |
767 | return err; | |
768 | } | |
769 | #endif | |
770 | ||
771 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
772 | struct net_device *dev, | |
773 | struct flowi4 *fl4, | |
774 | struct ip_tunnel_info *info) | |
e305ac6c | 775 | { |
db3c6139 | 776 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 777 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 778 | struct dst_cache *dst_cache; |
e305ac6c PS |
779 | struct rtable *rt = NULL; |
780 | __u8 tos; | |
781 | ||
782 | memset(fl4, 0, sizeof(*fl4)); | |
783 | fl4->flowi4_mark = skb->mark; | |
784 | fl4->flowi4_proto = IPPROTO_UDP; | |
785 | ||
786 | if (info) { | |
787 | fl4->daddr = info->key.u.ipv4.dst; | |
788 | fl4->saddr = info->key.u.ipv4.src; | |
789 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
468dfffc | 790 | dst_cache = &info->dst_cache; |
e305ac6c PS |
791 | } else { |
792 | tos = geneve->tos; | |
793 | if (tos == 1) { | |
794 | const struct iphdr *iip = ip_hdr(skb); | |
795 | ||
796 | tos = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 797 | use_cache = false; |
e305ac6c PS |
798 | } |
799 | ||
800 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 801 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
468dfffc PA |
802 | dst_cache = &geneve->dst_cache; |
803 | } | |
804 | ||
468dfffc PA |
805 | if (use_cache) { |
806 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
807 | if (rt) | |
808 | return rt; | |
e305ac6c PS |
809 | } |
810 | ||
811 | rt = ip_route_output_key(geneve->net, fl4); | |
812 | if (IS_ERR(rt)) { | |
813 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 814 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
815 | } |
816 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
817 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 818 | ip_rt_put(rt); |
fc4099f1 | 819 | return ERR_PTR(-ELOOP); |
e305ac6c | 820 | } |
468dfffc PA |
821 | if (use_cache) |
822 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
823 | return rt; |
824 | } | |
825 | ||
8ed66f0e JL |
826 | #if IS_ENABLED(CONFIG_IPV6) |
827 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
828 | struct net_device *dev, | |
829 | struct flowi6 *fl6, | |
830 | struct ip_tunnel_info *info) | |
831 | { | |
db3c6139 | 832 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e JL |
833 | struct geneve_dev *geneve = netdev_priv(dev); |
834 | struct geneve_sock *gs6 = geneve->sock6; | |
835 | struct dst_entry *dst = NULL; | |
468dfffc | 836 | struct dst_cache *dst_cache; |
3a56f86f | 837 | __u8 prio; |
8ed66f0e JL |
838 | |
839 | memset(fl6, 0, sizeof(*fl6)); | |
840 | fl6->flowi6_mark = skb->mark; | |
841 | fl6->flowi6_proto = IPPROTO_UDP; | |
842 | ||
843 | if (info) { | |
844 | fl6->daddr = info->key.u.ipv6.dst; | |
845 | fl6->saddr = info->key.u.ipv6.src; | |
95caf6f7 DB |
846 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos), |
847 | info->key.label); | |
468dfffc | 848 | dst_cache = &info->dst_cache; |
8ed66f0e | 849 | } else { |
3a56f86f JL |
850 | prio = geneve->tos; |
851 | if (prio == 1) { | |
852 | const struct iphdr *iip = ip_hdr(skb); | |
853 | ||
854 | prio = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 855 | use_cache = false; |
3a56f86f JL |
856 | } |
857 | ||
95caf6f7 DB |
858 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
859 | geneve->label); | |
8ed66f0e | 860 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
468dfffc PA |
861 | dst_cache = &geneve->dst_cache; |
862 | } | |
863 | ||
468dfffc PA |
864 | if (use_cache) { |
865 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
866 | if (dst) | |
867 | return dst; | |
8ed66f0e JL |
868 | } |
869 | ||
870 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
871 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
872 | return ERR_PTR(-ENETUNREACH); | |
873 | } | |
874 | if (dst->dev == dev) { /* is this necessary? */ | |
875 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
876 | dst_release(dst); | |
877 | return ERR_PTR(-ELOOP); | |
878 | } | |
879 | ||
468dfffc PA |
880 | if (use_cache) |
881 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
882 | return dst; |
883 | } | |
884 | #endif | |
885 | ||
e305ac6c PS |
886 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
887 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
888 | { | |
889 | #ifdef __BIG_ENDIAN | |
890 | vni[0] = (__force __u8)(tun_id >> 16); | |
891 | vni[1] = (__force __u8)(tun_id >> 8); | |
892 | vni[2] = (__force __u8)tun_id; | |
893 | #else | |
894 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
895 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
896 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
897 | #endif | |
898 | } | |
899 | ||
8ed66f0e JL |
900 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
901 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
902 | { |
903 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 904 | struct geneve_sock *gs4 = geneve->sock4; |
2d07dc79 | 905 | struct rtable *rt = NULL; |
08399efc | 906 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 907 | int err = -EINVAL; |
2d07dc79 | 908 | struct flowi4 fl4; |
8760ce58 | 909 | __u8 tos, ttl; |
e305ac6c | 910 | __be16 sport; |
371bd106 | 911 | __be16 df; |
8ed66f0e | 912 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 913 | u32 flags = geneve->flags; |
2d07dc79 | 914 | |
e305ac6c | 915 | if (geneve->collect_md) { |
8ed66f0e | 916 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
917 | netdev_dbg(dev, "no tunnel metadata\n"); |
918 | goto tx_error; | |
919 | } | |
7f9562a1 JB |
920 | if (info && ip_tunnel_info_af(info) != AF_INET) |
921 | goto tx_error; | |
e305ac6c | 922 | } |
980c394c | 923 | |
8ed66f0e | 924 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 925 | if (IS_ERR(rt)) { |
fc4099f1 | 926 | err = PTR_ERR(rt); |
2d07dc79 JL |
927 | goto tx_error; |
928 | } | |
371bd106 PS |
929 | |
930 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 931 | skb_reset_mac_header(skb); |
e305ac6c | 932 | |
08399efc JL |
933 | iip = ip_hdr(skb); |
934 | ||
e305ac6c PS |
935 | if (info) { |
936 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
937 | u8 *opts = NULL; |
938 | u8 vni[3]; | |
e305ac6c PS |
939 | |
940 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 941 | if (info->options_len) |
4c222798 | 942 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 943 | |
abe492b4 | 944 | if (key->tun_flags & TUNNEL_CSUM) |
14f1f724 | 945 | flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 946 | else |
14f1f724 | 947 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 948 | |
371bd106 | 949 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 950 | info->options_len, opts, flags, xnet); |
371bd106 PS |
951 | if (unlikely(err)) |
952 | goto err; | |
953 | ||
08399efc | 954 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
955 | ttl = key->ttl; |
956 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 957 | } else { |
371bd106 | 958 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 959 | 0, NULL, flags, xnet); |
371bd106 PS |
960 | if (unlikely(err)) |
961 | goto err; | |
962 | ||
e305ac6c | 963 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
964 | ttl = geneve->ttl; |
965 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
966 | ttl = 1; | |
e305ac6c | 967 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 968 | df = 0; |
2d07dc79 | 969 | } |
039f5062 PS |
970 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
971 | tos, ttl, df, sport, geneve->dst_port, | |
972 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
14f1f724 | 973 | !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX)); |
2d07dc79 | 974 | |
2d07dc79 JL |
975 | return NETDEV_TX_OK; |
976 | ||
2d07dc79 | 977 | tx_error: |
2d07dc79 | 978 | dev_kfree_skb(skb); |
371bd106 | 979 | err: |
fc4099f1 PS |
980 | if (err == -ELOOP) |
981 | dev->stats.collisions++; | |
982 | else if (err == -ENETUNREACH) | |
983 | dev->stats.tx_carrier_errors++; | |
984 | else | |
985 | dev->stats.tx_errors++; | |
2d07dc79 JL |
986 | return NETDEV_TX_OK; |
987 | } | |
988 | ||
8ed66f0e JL |
989 | #if IS_ENABLED(CONFIG_IPV6) |
990 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
991 | struct ip_tunnel_info *info) | |
992 | { | |
993 | struct geneve_dev *geneve = netdev_priv(dev); | |
994 | struct geneve_sock *gs6 = geneve->sock6; | |
995 | struct dst_entry *dst = NULL; | |
3a56f86f | 996 | const struct iphdr *iip; /* interior IP header */ |
8ed66f0e JL |
997 | int err = -EINVAL; |
998 | struct flowi6 fl6; | |
3a56f86f | 999 | __u8 prio, ttl; |
8ed66f0e | 1000 | __be16 sport; |
8eb3b995 | 1001 | __be32 label; |
8ed66f0e | 1002 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 1003 | u32 flags = geneve->flags; |
8ed66f0e JL |
1004 | |
1005 | if (geneve->collect_md) { | |
1006 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
1007 | netdev_dbg(dev, "no tunnel metadata\n"); | |
1008 | goto tx_error; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1013 | if (IS_ERR(dst)) { | |
1014 | err = PTR_ERR(dst); | |
1015 | goto tx_error; | |
1016 | } | |
1017 | ||
1018 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
1019 | skb_reset_mac_header(skb); | |
1020 | ||
3a56f86f JL |
1021 | iip = ip_hdr(skb); |
1022 | ||
8ed66f0e JL |
1023 | if (info) { |
1024 | const struct ip_tunnel_key *key = &info->key; | |
1025 | u8 *opts = NULL; | |
1026 | u8 vni[3]; | |
1027 | ||
1028 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 1029 | if (info->options_len) |
8ed66f0e JL |
1030 | opts = ip_tunnel_info_opts(info); |
1031 | ||
abe492b4 | 1032 | if (key->tun_flags & TUNNEL_CSUM) |
35e2d115 | 1033 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1034 | else |
35e2d115 | 1035 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1036 | |
8ed66f0e JL |
1037 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
1038 | info->options_len, opts, | |
abe492b4 | 1039 | flags, xnet); |
8ed66f0e JL |
1040 | if (unlikely(err)) |
1041 | goto err; | |
1042 | ||
3a56f86f | 1043 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e | 1044 | ttl = key->ttl; |
8eb3b995 | 1045 | label = info->key.label; |
8ed66f0e | 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 | ||
95caf6f7 DB |
1052 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), |
1053 | iip, skb); | |
8ed66f0e JL |
1054 | ttl = geneve->ttl; |
1055 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1056 | ttl = 1; | |
1057 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
8eb3b995 | 1058 | label = geneve->label; |
8ed66f0e | 1059 | } |
8eb3b995 | 1060 | |
039f5062 | 1061 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
8eb3b995 | 1062 | &fl6.saddr, &fl6.daddr, prio, ttl, label, |
039f5062 PS |
1063 | sport, geneve->dst_port, |
1064 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1065 | return NETDEV_TX_OK; |
1066 | ||
1067 | tx_error: | |
1068 | dev_kfree_skb(skb); | |
1069 | err: | |
1070 | if (err == -ELOOP) | |
1071 | dev->stats.collisions++; | |
1072 | else if (err == -ENETUNREACH) | |
1073 | dev->stats.tx_carrier_errors++; | |
1074 | else | |
1075 | dev->stats.tx_errors++; | |
1076 | return NETDEV_TX_OK; | |
1077 | } | |
1078 | #endif | |
1079 | ||
1080 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1081 | { | |
1082 | struct geneve_dev *geneve = netdev_priv(dev); | |
1083 | struct ip_tunnel_info *info = NULL; | |
1084 | ||
1085 | if (geneve->collect_md) | |
1086 | info = skb_tunnel_info(skb); | |
1087 | ||
1088 | #if IS_ENABLED(CONFIG_IPV6) | |
1089 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1090 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1091 | return geneve6_xmit_skb(skb, dev, info); | |
1092 | #endif | |
1093 | return geneve_xmit_skb(skb, dev, info); | |
1094 | } | |
1095 | ||
aeee0e66 | 1096 | static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) |
55e5bfb5 | 1097 | { |
aeee0e66 DW |
1098 | /* The max_mtu calculation does not take account of GENEVE |
1099 | * options, to avoid excluding potentially valid | |
1100 | * configurations. | |
55e5bfb5 | 1101 | */ |
aeee0e66 DW |
1102 | int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - sizeof(struct iphdr) |
1103 | - dev->hard_header_len; | |
1104 | ||
1105 | if (new_mtu < 68) | |
55e5bfb5 | 1106 | return -EINVAL; |
aeee0e66 DW |
1107 | |
1108 | if (new_mtu > max_mtu) { | |
1109 | if (strict) | |
1110 | return -EINVAL; | |
1111 | ||
1112 | new_mtu = max_mtu; | |
1113 | } | |
1114 | ||
55e5bfb5 DW |
1115 | dev->mtu = new_mtu; |
1116 | return 0; | |
1117 | } | |
1118 | ||
aeee0e66 DW |
1119 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
1120 | { | |
1121 | return __geneve_change_mtu(dev, new_mtu, true); | |
1122 | } | |
1123 | ||
fc4099f1 PS |
1124 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1125 | { | |
1126 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1127 | struct geneve_dev *geneve = netdev_priv(dev); | |
1128 | struct rtable *rt; | |
1129 | struct flowi4 fl4; | |
b8812fa8 JL |
1130 | #if IS_ENABLED(CONFIG_IPV6) |
1131 | struct dst_entry *dst; | |
1132 | struct flowi6 fl6; | |
1133 | #endif | |
fc4099f1 | 1134 | |
b8812fa8 JL |
1135 | if (ip_tunnel_info_af(info) == AF_INET) { |
1136 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1137 | if (IS_ERR(rt)) | |
1138 | return PTR_ERR(rt); | |
fc4099f1 | 1139 | |
b8812fa8 JL |
1140 | ip_rt_put(rt); |
1141 | info->key.u.ipv4.src = fl4.saddr; | |
1142 | #if IS_ENABLED(CONFIG_IPV6) | |
1143 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1144 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1145 | if (IS_ERR(dst)) | |
1146 | return PTR_ERR(dst); | |
1147 | ||
1148 | dst_release(dst); | |
1149 | info->key.u.ipv6.src = fl6.saddr; | |
1150 | #endif | |
1151 | } else { | |
1152 | return -EINVAL; | |
1153 | } | |
fc4099f1 | 1154 | |
fc4099f1 PS |
1155 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1156 | 1, USHRT_MAX, true); | |
1157 | info->key.tp_dst = geneve->dst_port; | |
1158 | return 0; | |
1159 | } | |
1160 | ||
2d07dc79 JL |
1161 | static const struct net_device_ops geneve_netdev_ops = { |
1162 | .ndo_init = geneve_init, | |
1163 | .ndo_uninit = geneve_uninit, | |
1164 | .ndo_open = geneve_open, | |
1165 | .ndo_stop = geneve_stop, | |
1166 | .ndo_start_xmit = geneve_xmit, | |
1167 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1168 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1169 | .ndo_validate_addr = eth_validate_addr, |
1170 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1171 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1172 | }; |
1173 | ||
1174 | static void geneve_get_drvinfo(struct net_device *dev, | |
1175 | struct ethtool_drvinfo *drvinfo) | |
1176 | { | |
1177 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1178 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1179 | } | |
1180 | ||
1181 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1182 | .get_drvinfo = geneve_get_drvinfo, | |
1183 | .get_link = ethtool_op_get_link, | |
1184 | }; | |
1185 | ||
1186 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1187 | static struct device_type geneve_type = { | |
1188 | .name = "geneve", | |
1189 | }; | |
1190 | ||
05ca4029 SA |
1191 | /* Calls the ndo_add_geneve_port of the caller in order to |
1192 | * supply the listening GENEVE udp ports. Callers are expected | |
1193 | * to implement the ndo_add_geneve_port. | |
1194 | */ | |
1195 | void geneve_get_rx_port(struct net_device *dev) | |
1196 | { | |
1197 | struct net *net = dev_net(dev); | |
1198 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1199 | struct geneve_sock *gs; | |
1200 | sa_family_t sa_family; | |
1201 | struct sock *sk; | |
1202 | __be16 port; | |
1203 | ||
1204 | rcu_read_lock(); | |
1205 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { | |
1206 | sk = gs->sock->sk; | |
1207 | sa_family = sk->sk_family; | |
1208 | port = inet_sk(sk)->inet_sport; | |
1209 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, port); | |
1210 | } | |
1211 | rcu_read_unlock(); | |
1212 | } | |
1213 | EXPORT_SYMBOL_GPL(geneve_get_rx_port); | |
1214 | ||
2d07dc79 JL |
1215 | /* Initialize the device structure. */ |
1216 | static void geneve_setup(struct net_device *dev) | |
1217 | { | |
1218 | ether_setup(dev); | |
1219 | ||
1220 | dev->netdev_ops = &geneve_netdev_ops; | |
1221 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1222 | dev->destructor = free_netdev; | |
1223 | ||
1224 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1225 | ||
2d07dc79 JL |
1226 | dev->features |= NETIF_F_LLTX; |
1227 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1228 | dev->features |= NETIF_F_RXCSUM; | |
1229 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1230 | ||
2d07dc79 JL |
1231 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1232 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1233 | |
1234 | netif_keep_dst(dev); | |
fc41cdb3 | 1235 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1236 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1237 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1238 | } |
1239 | ||
1240 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1241 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1242 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1243 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1244 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1245 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1246 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1247 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1248 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1249 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1250 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1251 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1252 | }; |
1253 | ||
1254 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1255 | { | |
1256 | if (tb[IFLA_ADDRESS]) { | |
1257 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1261 | return -EADDRNOTAVAIL; | |
1262 | } | |
1263 | ||
1264 | if (!data) | |
1265 | return -EINVAL; | |
1266 | ||
1267 | if (data[IFLA_GENEVE_ID]) { | |
1268 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1269 | ||
1270 | if (vni >= GENEVE_VID_MASK) | |
1271 | return -ERANGE; | |
1272 | } | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
371bd106 PS |
1277 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1278 | __be16 dst_port, | |
8ed66f0e | 1279 | union geneve_addr *remote, |
371bd106 PS |
1280 | u8 vni[], |
1281 | bool *tun_on_same_port, | |
1282 | bool *tun_collect_md) | |
1283 | { | |
1284 | struct geneve_dev *geneve, *t; | |
1285 | ||
1286 | *tun_on_same_port = false; | |
1287 | *tun_collect_md = false; | |
1288 | t = NULL; | |
1289 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1290 | if (geneve->dst_port == dst_port) { | |
1291 | *tun_collect_md = geneve->collect_md; | |
1292 | *tun_on_same_port = true; | |
1293 | } | |
1294 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1295 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1296 | dst_port == geneve->dst_port) |
1297 | t = geneve; | |
1298 | } | |
1299 | return t; | |
1300 | } | |
1301 | ||
e305ac6c | 1302 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e | 1303 | union geneve_addr *remote, |
8eb3b995 DB |
1304 | __u32 vni, __u8 ttl, __u8 tos, __be32 label, |
1305 | __be16 dst_port, bool metadata, u32 flags) | |
2d07dc79 JL |
1306 | { |
1307 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1308 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1309 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1310 | int err, encap_len; |
2d07dc79 | 1311 | |
8ed66f0e JL |
1312 | if (!remote) |
1313 | return -EINVAL; | |
1314 | if (metadata && | |
8eb3b995 | 1315 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label)) |
8ed66f0e | 1316 | return -EINVAL; |
2d07dc79 JL |
1317 | |
1318 | geneve->net = net; | |
1319 | geneve->dev = dev; | |
1320 | ||
2d07dc79 JL |
1321 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1322 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1323 | geneve->vni[2] = vni & 0x000000ff; | |
1324 | ||
8ed66f0e JL |
1325 | if ((remote->sa.sa_family == AF_INET && |
1326 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1327 | (remote->sa.sa_family == AF_INET6 && | |
1328 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1329 | return -EINVAL; |
8eb3b995 DB |
1330 | if (label && remote->sa.sa_family != AF_INET6) |
1331 | return -EINVAL; | |
1332 | ||
8ed66f0e | 1333 | geneve->remote = *remote; |
2d07dc79 | 1334 | |
e305ac6c PS |
1335 | geneve->ttl = ttl; |
1336 | geneve->tos = tos; | |
8eb3b995 | 1337 | geneve->label = label; |
7bbe33ff | 1338 | geneve->dst_port = dst_port; |
e305ac6c | 1339 | geneve->collect_md = metadata; |
abe492b4 | 1340 | geneve->flags = flags; |
e305ac6c | 1341 | |
8ed66f0e | 1342 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1343 | &tun_on_same_port, &tun_collect_md); |
1344 | if (t) | |
1345 | return -EBUSY; | |
1346 | ||
184fc8b5 PA |
1347 | /* make enough headroom for basic scenario */ |
1348 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1349 | if (remote->sa.sa_family == AF_INET) | |
1350 | encap_len += sizeof(struct iphdr); | |
1351 | else | |
1352 | encap_len += sizeof(struct ipv6hdr); | |
1353 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1354 | ||
371bd106 PS |
1355 | if (metadata) { |
1356 | if (tun_on_same_port) | |
1357 | return -EPERM; | |
1358 | } else { | |
1359 | if (tun_collect_md) | |
1360 | return -EPERM; | |
1361 | } | |
1362 | ||
468dfffc PA |
1363 | dst_cache_reset(&geneve->dst_cache); |
1364 | ||
2d07dc79 JL |
1365 | err = register_netdevice(dev); |
1366 | if (err) | |
1367 | return err; | |
1368 | ||
e305ac6c | 1369 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1370 | return 0; |
1371 | } | |
1372 | ||
1373 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1374 | struct nlattr *tb[], struct nlattr *data[]) | |
1375 | { | |
7bbe33ff | 1376 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1377 | __u8 ttl = 0, tos = 0; |
1378 | bool metadata = false; | |
8ed66f0e | 1379 | union geneve_addr remote = geneve_remote_unspec; |
8eb3b995 | 1380 | __be32 label = 0; |
e277de5f | 1381 | __u32 vni = 0; |
abe492b4 | 1382 | u32 flags = 0; |
e305ac6c | 1383 | |
8ed66f0e JL |
1384 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1385 | return -EINVAL; | |
1386 | ||
1387 | if (data[IFLA_GENEVE_REMOTE]) { | |
1388 | remote.sa.sa_family = AF_INET; | |
1389 | remote.sin.sin_addr.s_addr = | |
1390 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1391 | } | |
1392 | ||
1393 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1394 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1395 | return -EPFNOSUPPORT; | |
1396 | ||
1397 | remote.sa.sa_family = AF_INET6; | |
1398 | remote.sin6.sin6_addr = | |
1399 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1400 | ||
1401 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1402 | IPV6_ADDR_LINKLOCAL) { | |
1403 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1404 | return -EINVAL; | |
1405 | } | |
1406 | } | |
1407 | ||
e277de5f JG |
1408 | if (data[IFLA_GENEVE_ID]) |
1409 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1410 | |
8760ce58 | 1411 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1412 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1413 | |
d8951125 | 1414 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1415 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1416 | |
8eb3b995 DB |
1417 | if (data[IFLA_GENEVE_LABEL]) |
1418 | label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1419 | IPV6_FLOWLABEL_MASK; | |
1420 | ||
e305ac6c | 1421 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1422 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1423 | |
e305ac6c PS |
1424 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1425 | metadata = true; | |
2d07dc79 | 1426 | |
abe492b4 | 1427 | if (data[IFLA_GENEVE_UDP_CSUM] && |
14f1f724 AD |
1428 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1429 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; | |
abe492b4 TH |
1430 | |
1431 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1432 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1433 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1434 | ||
1435 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1436 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1437 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1438 | ||
8eb3b995 DB |
1439 | return geneve_configure(net, dev, &remote, vni, ttl, tos, label, |
1440 | dst_port, metadata, flags); | |
2d07dc79 JL |
1441 | } |
1442 | ||
1443 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1444 | { | |
1445 | struct geneve_dev *geneve = netdev_priv(dev); | |
1446 | ||
2d07dc79 JL |
1447 | list_del(&geneve->next); |
1448 | unregister_netdevice_queue(dev, head); | |
1449 | } | |
1450 | ||
1451 | static size_t geneve_get_size(const struct net_device *dev) | |
1452 | { | |
1453 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1454 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1455 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1456 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
8eb3b995 | 1457 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1458 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1459 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1460 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1461 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1462 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1463 | 0; |
1464 | } | |
1465 | ||
1466 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1467 | { | |
1468 | struct geneve_dev *geneve = netdev_priv(dev); | |
1469 | __u32 vni; | |
1470 | ||
1471 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1472 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1473 | goto nla_put_failure; | |
1474 | ||
8ed66f0e JL |
1475 | if (geneve->remote.sa.sa_family == AF_INET) { |
1476 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1477 | geneve->remote.sin.sin_addr.s_addr)) | |
1478 | goto nla_put_failure; | |
1479 | #if IS_ENABLED(CONFIG_IPV6) | |
1480 | } else { | |
1481 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1482 | &geneve->remote.sin6.sin6_addr)) | |
1483 | goto nla_put_failure; | |
1484 | #endif | |
1485 | } | |
2d07dc79 | 1486 | |
d8951125 | 1487 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
8eb3b995 DB |
1488 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) || |
1489 | nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label)) | |
8760ce58 JL |
1490 | goto nla_put_failure; |
1491 | ||
7bbe33ff | 1492 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1493 | goto nla_put_failure; |
1494 | ||
e305ac6c PS |
1495 | if (geneve->collect_md) { |
1496 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1497 | goto nla_put_failure; | |
1498 | } | |
1499 | ||
abe492b4 | 1500 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
14f1f724 | 1501 | !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) || |
abe492b4 TH |
1502 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1503 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1504 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1505 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1506 | goto nla_put_failure; | |
1507 | ||
2d07dc79 JL |
1508 | return 0; |
1509 | ||
1510 | nla_put_failure: | |
1511 | return -EMSGSIZE; | |
1512 | } | |
1513 | ||
1514 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1515 | .kind = "geneve", | |
1516 | .maxtype = IFLA_GENEVE_MAX, | |
1517 | .policy = geneve_policy, | |
1518 | .priv_size = sizeof(struct geneve_dev), | |
1519 | .setup = geneve_setup, | |
1520 | .validate = geneve_validate, | |
1521 | .newlink = geneve_newlink, | |
1522 | .dellink = geneve_dellink, | |
1523 | .get_size = geneve_get_size, | |
1524 | .fill_info = geneve_fill_info, | |
1525 | }; | |
1526 | ||
e305ac6c PS |
1527 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1528 | u8 name_assign_type, u16 dst_port) | |
1529 | { | |
1530 | struct nlattr *tb[IFLA_MAX + 1]; | |
1531 | struct net_device *dev; | |
1532 | int err; | |
1533 | ||
1534 | memset(tb, 0, sizeof(tb)); | |
1535 | dev = rtnl_create_link(net, name, name_assign_type, | |
1536 | &geneve_link_ops, tb); | |
1537 | if (IS_ERR(dev)) | |
1538 | return dev; | |
1539 | ||
8ed66f0e | 1540 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
8eb3b995 | 1541 | 0, 0, 0, 0, htons(dst_port), true, |
c868ee70 | 1542 | GENEVE_F_UDP_ZERO_CSUM6_RX); |
7e059158 DW |
1543 | if (err) |
1544 | goto err; | |
1545 | ||
1546 | /* openvswitch users expect packet sizes to be unrestricted, | |
1547 | * so set the largest MTU we can. | |
1548 | */ | |
aeee0e66 | 1549 | err = __geneve_change_mtu(dev, IP_MAX_MTU, false); |
7e059158 DW |
1550 | if (err) |
1551 | goto err; | |
1552 | ||
e305ac6c | 1553 | return dev; |
7e059158 DW |
1554 | |
1555 | err: | |
1556 | free_netdev(dev); | |
1557 | return ERR_PTR(err); | |
e305ac6c PS |
1558 | } |
1559 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1560 | ||
2d07dc79 JL |
1561 | static __net_init int geneve_init_net(struct net *net) |
1562 | { | |
1563 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1564 | |
1565 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1566 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1567 | return 0; |
1568 | } | |
1569 | ||
1570 | static void __net_exit geneve_exit_net(struct net *net) | |
1571 | { | |
1572 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1573 | struct geneve_dev *geneve, *next; | |
1574 | struct net_device *dev, *aux; | |
1575 | LIST_HEAD(list); | |
1576 | ||
1577 | rtnl_lock(); | |
1578 | ||
1579 | /* gather any geneve devices that were moved into this ns */ | |
1580 | for_each_netdev_safe(net, dev, aux) | |
1581 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1582 | unregister_netdevice_queue(dev, &list); | |
1583 | ||
1584 | /* now gather any other geneve devices that were created in this ns */ | |
1585 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1586 | /* If geneve->dev is in the same netns, it was already added | |
1587 | * to the list by the previous loop. | |
1588 | */ | |
1589 | if (!net_eq(dev_net(geneve->dev), net)) | |
1590 | unregister_netdevice_queue(geneve->dev, &list); | |
1591 | } | |
1592 | ||
1593 | /* unregister the devices gathered above */ | |
1594 | unregister_netdevice_many(&list); | |
1595 | rtnl_unlock(); | |
1596 | } | |
1597 | ||
1598 | static struct pernet_operations geneve_net_ops = { | |
1599 | .init = geneve_init_net, | |
1600 | .exit = geneve_exit_net, | |
1601 | .id = &geneve_net_id, | |
1602 | .size = sizeof(struct geneve_net), | |
1603 | }; | |
1604 | ||
1605 | static int __init geneve_init_module(void) | |
1606 | { | |
1607 | int rc; | |
1608 | ||
1609 | rc = register_pernet_subsys(&geneve_net_ops); | |
1610 | if (rc) | |
1611 | goto out1; | |
1612 | ||
1613 | rc = rtnl_link_register(&geneve_link_ops); | |
1614 | if (rc) | |
1615 | goto out2; | |
1616 | ||
1617 | return 0; | |
1618 | out2: | |
1619 | unregister_pernet_subsys(&geneve_net_ops); | |
1620 | out1: | |
1621 | return rc; | |
1622 | } | |
1623 | late_initcall(geneve_init_module); | |
1624 | ||
1625 | static void __exit geneve_cleanup_module(void) | |
1626 | { | |
1627 | rtnl_link_unregister(&geneve_link_ops); | |
1628 | unregister_pernet_subsys(&geneve_net_ops); | |
1629 | } | |
1630 | module_exit(geneve_cleanup_module); | |
1631 | ||
1632 | MODULE_LICENSE("GPL"); | |
1633 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1634 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1635 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1636 | MODULE_ALIAS_RTNL_LINK("geneve"); |