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Commit | Line | Data |
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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 */ | |
fceb9c3e | 61 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 62 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 63 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 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); | |
fcd91dd4 | 456 | pp = call_gro_receive(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 | { | |
fceb9c3e | 546 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 547 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 548 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
549 | ||
550 | rcu_assign_pointer(geneve->sock6, NULL); | |
551 | #endif | |
552 | ||
553 | rcu_assign_pointer(geneve->sock4, NULL); | |
554 | synchronize_net(); | |
555 | ||
556 | __geneve_sock_release(gs4); | |
557 | #if IS_ENABLED(CONFIG_IPV6) | |
558 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
559 | #endif |
560 | } | |
561 | ||
371bd106 | 562 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 563 | sa_family_t family, |
371bd106 PS |
564 | __be16 dst_port) |
565 | { | |
566 | struct geneve_sock *gs; | |
567 | ||
568 | list_for_each_entry(gs, &gn->sock_list, list) { | |
569 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 570 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
571 | return gs; |
572 | } | |
573 | } | |
574 | return NULL; | |
575 | } | |
576 | ||
8ed66f0e | 577 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 578 | { |
2d07dc79 | 579 | struct net *net = geneve->net; |
371bd106 | 580 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 581 | struct geneve_sock *gs; |
66d47003 | 582 | __u32 hash; |
2d07dc79 | 583 | |
8ed66f0e | 584 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
371bd106 PS |
585 | if (gs) { |
586 | gs->refcnt++; | |
587 | goto out; | |
588 | } | |
589 | ||
abe492b4 | 590 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
2d07dc79 JL |
591 | if (IS_ERR(gs)) |
592 | return PTR_ERR(gs); | |
593 | ||
371bd106 PS |
594 | out: |
595 | gs->collect_md = geneve->collect_md; | |
abe492b4 | 596 | gs->flags = geneve->flags; |
8ed66f0e JL |
597 | #if IS_ENABLED(CONFIG_IPV6) |
598 | if (ipv6) | |
fceb9c3e | 599 | rcu_assign_pointer(geneve->sock6, gs); |
8ed66f0e JL |
600 | else |
601 | #endif | |
fceb9c3e | 602 | rcu_assign_pointer(geneve->sock4, gs); |
66d47003 PS |
603 | |
604 | hash = geneve_net_vni_hash(geneve->vni); | |
605 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
2d07dc79 JL |
606 | return 0; |
607 | } | |
608 | ||
8ed66f0e JL |
609 | static int geneve_open(struct net_device *dev) |
610 | { | |
611 | struct geneve_dev *geneve = netdev_priv(dev); | |
612 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
613 | bool metadata = geneve->collect_md; | |
614 | int ret = 0; | |
615 | ||
8ed66f0e | 616 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
617 | if (ipv6 || metadata) |
618 | ret = geneve_sock_add(geneve, true); | |
619 | #endif | |
620 | if (!ret && (!ipv6 || metadata)) | |
621 | ret = geneve_sock_add(geneve, false); | |
622 | if (ret < 0) | |
623 | geneve_sock_release(geneve); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
2d07dc79 JL |
628 | static int geneve_stop(struct net_device *dev) |
629 | { | |
630 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 631 | |
66d47003 PS |
632 | if (!hlist_unhashed(&geneve->hlist)) |
633 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 634 | geneve_sock_release(geneve); |
371bd106 PS |
635 | return 0; |
636 | } | |
637 | ||
8ed66f0e JL |
638 | static void geneve_build_header(struct genevehdr *geneveh, |
639 | __be16 tun_flags, u8 vni[3], | |
640 | u8 options_len, u8 *options) | |
641 | { | |
642 | geneveh->ver = GENEVE_VER; | |
643 | geneveh->opt_len = options_len / 4; | |
644 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
645 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
646 | geneveh->rsvd1 = 0; | |
647 | memcpy(geneveh->vni, vni, 3); | |
648 | geneveh->proto_type = htons(ETH_P_TEB); | |
649 | geneveh->rsvd2 = 0; | |
650 | ||
651 | memcpy(geneveh->options, options, options_len); | |
652 | } | |
653 | ||
371bd106 PS |
654 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
655 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 656 | u32 flags, bool xnet) |
371bd106 PS |
657 | { |
658 | struct genevehdr *gnvh; | |
659 | int min_headroom; | |
660 | int err; | |
14f1f724 | 661 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX); |
2d07dc79 | 662 | |
8ed66f0e JL |
663 | skb_scrub_packet(skb, xnet); |
664 | ||
371bd106 PS |
665 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
666 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); | |
667 | err = skb_cow_head(skb, min_headroom); | |
aed069df | 668 | if (unlikely(err)) |
371bd106 | 669 | goto free_rt; |
371bd106 | 670 | |
aed069df AD |
671 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
672 | if (err) | |
371bd106 | 673 | goto free_rt; |
371bd106 PS |
674 | |
675 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
8ed66f0e | 676 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
371bd106 PS |
677 | |
678 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
2d07dc79 | 679 | return 0; |
371bd106 PS |
680 | |
681 | free_rt: | |
682 | ip_rt_put(rt); | |
683 | return err; | |
2d07dc79 JL |
684 | } |
685 | ||
8ed66f0e JL |
686 | #if IS_ENABLED(CONFIG_IPV6) |
687 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
688 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
abe492b4 | 689 | u32 flags, bool xnet) |
8ed66f0e JL |
690 | { |
691 | struct genevehdr *gnvh; | |
692 | int min_headroom; | |
693 | int err; | |
abe492b4 | 694 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); |
8ed66f0e JL |
695 | |
696 | skb_scrub_packet(skb, xnet); | |
697 | ||
698 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
699 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
700 | err = skb_cow_head(skb, min_headroom); | |
aed069df | 701 | if (unlikely(err)) |
8ed66f0e | 702 | goto free_dst; |
8ed66f0e | 703 | |
aed069df | 704 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 705 | if (err) |
8ed66f0e | 706 | goto free_dst; |
8ed66f0e JL |
707 | |
708 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
709 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
710 | ||
711 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
712 | return 0; | |
713 | ||
714 | free_dst: | |
715 | dst_release(dst); | |
716 | return err; | |
717 | } | |
718 | #endif | |
719 | ||
720 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
721 | struct net_device *dev, | |
722 | struct flowi4 *fl4, | |
723 | struct ip_tunnel_info *info) | |
e305ac6c | 724 | { |
db3c6139 | 725 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 726 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 727 | struct dst_cache *dst_cache; |
e305ac6c PS |
728 | struct rtable *rt = NULL; |
729 | __u8 tos; | |
730 | ||
fceb9c3e | 731 | if (!rcu_dereference(geneve->sock4)) |
732 | return ERR_PTR(-EIO); | |
733 | ||
e305ac6c PS |
734 | memset(fl4, 0, sizeof(*fl4)); |
735 | fl4->flowi4_mark = skb->mark; | |
736 | fl4->flowi4_proto = IPPROTO_UDP; | |
737 | ||
738 | if (info) { | |
739 | fl4->daddr = info->key.u.ipv4.dst; | |
740 | fl4->saddr = info->key.u.ipv4.src; | |
741 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
468dfffc | 742 | dst_cache = &info->dst_cache; |
e305ac6c PS |
743 | } else { |
744 | tos = geneve->tos; | |
745 | if (tos == 1) { | |
746 | const struct iphdr *iip = ip_hdr(skb); | |
747 | ||
748 | tos = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 749 | use_cache = false; |
e305ac6c PS |
750 | } |
751 | ||
752 | fl4->flowi4_tos = RT_TOS(tos); | |
8ed66f0e | 753 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
468dfffc PA |
754 | dst_cache = &geneve->dst_cache; |
755 | } | |
756 | ||
468dfffc PA |
757 | if (use_cache) { |
758 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
759 | if (rt) | |
760 | return rt; | |
e305ac6c PS |
761 | } |
762 | ||
763 | rt = ip_route_output_key(geneve->net, fl4); | |
764 | if (IS_ERR(rt)) { | |
765 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 766 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
767 | } |
768 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
769 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 770 | ip_rt_put(rt); |
fc4099f1 | 771 | return ERR_PTR(-ELOOP); |
e305ac6c | 772 | } |
468dfffc PA |
773 | if (use_cache) |
774 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
775 | return rt; |
776 | } | |
777 | ||
8ed66f0e JL |
778 | #if IS_ENABLED(CONFIG_IPV6) |
779 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
780 | struct net_device *dev, | |
781 | struct flowi6 *fl6, | |
782 | struct ip_tunnel_info *info) | |
783 | { | |
db3c6139 | 784 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 785 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 786 | struct dst_entry *dst = NULL; |
468dfffc | 787 | struct dst_cache *dst_cache; |
fceb9c3e | 788 | struct geneve_sock *gs6; |
3a56f86f | 789 | __u8 prio; |
8ed66f0e | 790 | |
fceb9c3e | 791 | gs6 = rcu_dereference(geneve->sock6); |
792 | if (!gs6) | |
793 | return ERR_PTR(-EIO); | |
794 | ||
8ed66f0e JL |
795 | memset(fl6, 0, sizeof(*fl6)); |
796 | fl6->flowi6_mark = skb->mark; | |
797 | fl6->flowi6_proto = IPPROTO_UDP; | |
798 | ||
799 | if (info) { | |
800 | fl6->daddr = info->key.u.ipv6.dst; | |
801 | fl6->saddr = info->key.u.ipv6.src; | |
95caf6f7 DB |
802 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos), |
803 | info->key.label); | |
468dfffc | 804 | dst_cache = &info->dst_cache; |
8ed66f0e | 805 | } else { |
3a56f86f JL |
806 | prio = geneve->tos; |
807 | if (prio == 1) { | |
808 | const struct iphdr *iip = ip_hdr(skb); | |
809 | ||
810 | prio = ip_tunnel_get_dsfield(iip, skb); | |
468dfffc | 811 | use_cache = false; |
3a56f86f JL |
812 | } |
813 | ||
95caf6f7 DB |
814 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
815 | geneve->label); | |
8ed66f0e | 816 | fl6->daddr = geneve->remote.sin6.sin6_addr; |
468dfffc PA |
817 | dst_cache = &geneve->dst_cache; |
818 | } | |
819 | ||
468dfffc PA |
820 | if (use_cache) { |
821 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
822 | if (dst) | |
823 | return dst; | |
8ed66f0e JL |
824 | } |
825 | ||
826 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
827 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
828 | return ERR_PTR(-ENETUNREACH); | |
829 | } | |
830 | if (dst->dev == dev) { /* is this necessary? */ | |
831 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
832 | dst_release(dst); | |
833 | return ERR_PTR(-ELOOP); | |
834 | } | |
835 | ||
468dfffc PA |
836 | if (use_cache) |
837 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
838 | return dst; |
839 | } | |
840 | #endif | |
841 | ||
e305ac6c PS |
842 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
843 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
844 | { | |
845 | #ifdef __BIG_ENDIAN | |
846 | vni[0] = (__force __u8)(tun_id >> 16); | |
847 | vni[1] = (__force __u8)(tun_id >> 8); | |
848 | vni[2] = (__force __u8)tun_id; | |
849 | #else | |
850 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
851 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
852 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
853 | #endif | |
854 | } | |
855 | ||
8ed66f0e JL |
856 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
857 | struct ip_tunnel_info *info) | |
2d07dc79 JL |
858 | { |
859 | struct geneve_dev *geneve = netdev_priv(dev); | |
fceb9c3e | 860 | struct geneve_sock *gs4; |
2d07dc79 | 861 | struct rtable *rt = NULL; |
08399efc | 862 | const struct iphdr *iip; /* interior IP header */ |
fc4099f1 | 863 | int err = -EINVAL; |
2d07dc79 | 864 | struct flowi4 fl4; |
8760ce58 | 865 | __u8 tos, ttl; |
e305ac6c | 866 | __be16 sport; |
371bd106 | 867 | __be16 df; |
8ed66f0e | 868 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 869 | u32 flags = geneve->flags; |
2d07dc79 | 870 | |
fceb9c3e | 871 | gs4 = rcu_dereference(geneve->sock4); |
872 | if (!gs4) | |
873 | goto tx_error; | |
874 | ||
e305ac6c | 875 | if (geneve->collect_md) { |
8ed66f0e | 876 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e305ac6c PS |
877 | netdev_dbg(dev, "no tunnel metadata\n"); |
878 | goto tx_error; | |
879 | } | |
7f9562a1 JB |
880 | if (info && ip_tunnel_info_af(info) != AF_INET) |
881 | goto tx_error; | |
e305ac6c | 882 | } |
980c394c | 883 | |
8ed66f0e | 884 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
2d07dc79 | 885 | if (IS_ERR(rt)) { |
fc4099f1 | 886 | err = PTR_ERR(rt); |
2d07dc79 JL |
887 | goto tx_error; |
888 | } | |
371bd106 PS |
889 | |
890 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
e305ac6c | 891 | skb_reset_mac_header(skb); |
e305ac6c | 892 | |
08399efc JL |
893 | iip = ip_hdr(skb); |
894 | ||
e305ac6c PS |
895 | if (info) { |
896 | const struct ip_tunnel_key *key = &info->key; | |
e305ac6c PS |
897 | u8 *opts = NULL; |
898 | u8 vni[3]; | |
e305ac6c PS |
899 | |
900 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 901 | if (info->options_len) |
4c222798 | 902 | opts = ip_tunnel_info_opts(info); |
e305ac6c | 903 | |
abe492b4 | 904 | if (key->tun_flags & TUNNEL_CSUM) |
14f1f724 | 905 | flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 906 | else |
14f1f724 | 907 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; |
abe492b4 | 908 | |
371bd106 | 909 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
abe492b4 | 910 | info->options_len, opts, flags, xnet); |
371bd106 | 911 | if (unlikely(err)) |
aed069df | 912 | goto tx_error; |
371bd106 | 913 | |
08399efc | 914 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); |
371bd106 PS |
915 | ttl = key->ttl; |
916 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 917 | } else { |
371bd106 | 918 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
abe492b4 | 919 | 0, NULL, flags, xnet); |
371bd106 | 920 | if (unlikely(err)) |
aed069df | 921 | goto tx_error; |
371bd106 | 922 | |
e305ac6c | 923 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
e305ac6c PS |
924 | ttl = geneve->ttl; |
925 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
926 | ttl = 1; | |
e305ac6c | 927 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
371bd106 | 928 | df = 0; |
2d07dc79 | 929 | } |
039f5062 PS |
930 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
931 | tos, ttl, df, sport, geneve->dst_port, | |
932 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
14f1f724 | 933 | !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX)); |
2d07dc79 | 934 | |
2d07dc79 JL |
935 | return NETDEV_TX_OK; |
936 | ||
2d07dc79 | 937 | tx_error: |
2d07dc79 | 938 | dev_kfree_skb(skb); |
aed069df | 939 | |
fc4099f1 PS |
940 | if (err == -ELOOP) |
941 | dev->stats.collisions++; | |
942 | else if (err == -ENETUNREACH) | |
943 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
944 | |
945 | dev->stats.tx_errors++; | |
2d07dc79 JL |
946 | return NETDEV_TX_OK; |
947 | } | |
948 | ||
8ed66f0e JL |
949 | #if IS_ENABLED(CONFIG_IPV6) |
950 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
951 | struct ip_tunnel_info *info) | |
952 | { | |
953 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 954 | struct dst_entry *dst = NULL; |
3a56f86f | 955 | const struct iphdr *iip; /* interior IP header */ |
fceb9c3e | 956 | struct geneve_sock *gs6; |
8ed66f0e JL |
957 | int err = -EINVAL; |
958 | struct flowi6 fl6; | |
3a56f86f | 959 | __u8 prio, ttl; |
8ed66f0e | 960 | __be16 sport; |
8eb3b995 | 961 | __be32 label; |
8ed66f0e | 962 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
abe492b4 | 963 | u32 flags = geneve->flags; |
8ed66f0e | 964 | |
fceb9c3e | 965 | gs6 = rcu_dereference(geneve->sock6); |
966 | if (!gs6) | |
967 | goto tx_error; | |
968 | ||
8ed66f0e JL |
969 | if (geneve->collect_md) { |
970 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
971 | netdev_dbg(dev, "no tunnel metadata\n"); | |
972 | goto tx_error; | |
973 | } | |
974 | } | |
975 | ||
976 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
977 | if (IS_ERR(dst)) { | |
978 | err = PTR_ERR(dst); | |
979 | goto tx_error; | |
980 | } | |
981 | ||
982 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
983 | skb_reset_mac_header(skb); | |
984 | ||
3a56f86f JL |
985 | iip = ip_hdr(skb); |
986 | ||
8ed66f0e JL |
987 | if (info) { |
988 | const struct ip_tunnel_key *key = &info->key; | |
989 | u8 *opts = NULL; | |
990 | u8 vni[3]; | |
991 | ||
992 | tunnel_id_to_vni(key->tun_id, vni); | |
14ca0751 | 993 | if (info->options_len) |
8ed66f0e JL |
994 | opts = ip_tunnel_info_opts(info); |
995 | ||
abe492b4 | 996 | if (key->tun_flags & TUNNEL_CSUM) |
35e2d115 | 997 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 998 | else |
35e2d115 | 999 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; |
abe492b4 | 1000 | |
8ed66f0e JL |
1001 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, |
1002 | info->options_len, opts, | |
abe492b4 | 1003 | flags, xnet); |
8ed66f0e | 1004 | if (unlikely(err)) |
aed069df | 1005 | goto tx_error; |
8ed66f0e | 1006 | |
3a56f86f | 1007 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); |
8ed66f0e | 1008 | ttl = key->ttl; |
8eb3b995 | 1009 | label = info->key.label; |
8ed66f0e | 1010 | } else { |
8ed66f0e | 1011 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, |
abe492b4 | 1012 | 0, NULL, flags, xnet); |
8ed66f0e | 1013 | if (unlikely(err)) |
aed069df | 1014 | goto tx_error; |
8ed66f0e | 1015 | |
95caf6f7 DB |
1016 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), |
1017 | iip, skb); | |
8ed66f0e JL |
1018 | ttl = geneve->ttl; |
1019 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1020 | ttl = 1; | |
1021 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
8eb3b995 | 1022 | label = geneve->label; |
8ed66f0e | 1023 | } |
8eb3b995 | 1024 | |
039f5062 | 1025 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
8eb3b995 | 1026 | &fl6.saddr, &fl6.daddr, prio, ttl, label, |
039f5062 PS |
1027 | sport, geneve->dst_port, |
1028 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
8ed66f0e JL |
1029 | return NETDEV_TX_OK; |
1030 | ||
1031 | tx_error: | |
1032 | dev_kfree_skb(skb); | |
aed069df | 1033 | |
8ed66f0e JL |
1034 | if (err == -ELOOP) |
1035 | dev->stats.collisions++; | |
1036 | else if (err == -ENETUNREACH) | |
1037 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1038 | |
1039 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1040 | return NETDEV_TX_OK; |
1041 | } | |
1042 | #endif | |
1043 | ||
1044 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) | |
1045 | { | |
1046 | struct geneve_dev *geneve = netdev_priv(dev); | |
1047 | struct ip_tunnel_info *info = NULL; | |
1048 | ||
1049 | if (geneve->collect_md) | |
1050 | info = skb_tunnel_info(skb); | |
1051 | ||
1052 | #if IS_ENABLED(CONFIG_IPV6) | |
1053 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1054 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1055 | return geneve6_xmit_skb(skb, dev, info); | |
1056 | #endif | |
1057 | return geneve_xmit_skb(skb, dev, info); | |
1058 | } | |
1059 | ||
aeee0e66 | 1060 | static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) |
55e5bfb5 | 1061 | { |
d5d5e8d5 | 1062 | struct geneve_dev *geneve = netdev_priv(dev); |
aeee0e66 DW |
1063 | /* The max_mtu calculation does not take account of GENEVE |
1064 | * options, to avoid excluding potentially valid | |
1065 | * configurations. | |
55e5bfb5 | 1066 | */ |
d5d5e8d5 HY |
1067 | int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; |
1068 | ||
1069 | if (geneve->remote.sa.sa_family == AF_INET6) | |
1070 | max_mtu -= sizeof(struct ipv6hdr); | |
1071 | else | |
1072 | max_mtu -= sizeof(struct iphdr); | |
aeee0e66 DW |
1073 | |
1074 | if (new_mtu < 68) | |
55e5bfb5 | 1075 | return -EINVAL; |
aeee0e66 DW |
1076 | |
1077 | if (new_mtu > max_mtu) { | |
1078 | if (strict) | |
1079 | return -EINVAL; | |
1080 | ||
1081 | new_mtu = max_mtu; | |
1082 | } | |
1083 | ||
55e5bfb5 DW |
1084 | dev->mtu = new_mtu; |
1085 | return 0; | |
1086 | } | |
1087 | ||
aeee0e66 DW |
1088 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
1089 | { | |
1090 | return __geneve_change_mtu(dev, new_mtu, true); | |
1091 | } | |
1092 | ||
fc4099f1 PS |
1093 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1094 | { | |
1095 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1096 | struct geneve_dev *geneve = netdev_priv(dev); | |
1097 | struct rtable *rt; | |
1098 | struct flowi4 fl4; | |
b8812fa8 JL |
1099 | #if IS_ENABLED(CONFIG_IPV6) |
1100 | struct dst_entry *dst; | |
1101 | struct flowi6 fl6; | |
1102 | #endif | |
fc4099f1 | 1103 | |
b8812fa8 JL |
1104 | if (ip_tunnel_info_af(info) == AF_INET) { |
1105 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1106 | if (IS_ERR(rt)) | |
1107 | return PTR_ERR(rt); | |
fc4099f1 | 1108 | |
b8812fa8 JL |
1109 | ip_rt_put(rt); |
1110 | info->key.u.ipv4.src = fl4.saddr; | |
1111 | #if IS_ENABLED(CONFIG_IPV6) | |
1112 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1113 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1114 | if (IS_ERR(dst)) | |
1115 | return PTR_ERR(dst); | |
1116 | ||
1117 | dst_release(dst); | |
1118 | info->key.u.ipv6.src = fl6.saddr; | |
1119 | #endif | |
1120 | } else { | |
1121 | return -EINVAL; | |
1122 | } | |
fc4099f1 | 1123 | |
fc4099f1 PS |
1124 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1125 | 1, USHRT_MAX, true); | |
1126 | info->key.tp_dst = geneve->dst_port; | |
1127 | return 0; | |
1128 | } | |
1129 | ||
2d07dc79 JL |
1130 | static const struct net_device_ops geneve_netdev_ops = { |
1131 | .ndo_init = geneve_init, | |
1132 | .ndo_uninit = geneve_uninit, | |
1133 | .ndo_open = geneve_open, | |
1134 | .ndo_stop = geneve_stop, | |
1135 | .ndo_start_xmit = geneve_xmit, | |
1136 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1137 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1138 | .ndo_validate_addr = eth_validate_addr, |
1139 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1140 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1141 | }; |
1142 | ||
1143 | static void geneve_get_drvinfo(struct net_device *dev, | |
1144 | struct ethtool_drvinfo *drvinfo) | |
1145 | { | |
1146 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1147 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1148 | } | |
1149 | ||
1150 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1151 | .get_drvinfo = geneve_get_drvinfo, | |
1152 | .get_link = ethtool_op_get_link, | |
1153 | }; | |
1154 | ||
1155 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1156 | static struct device_type geneve_type = { | |
1157 | .name = "geneve", | |
1158 | }; | |
1159 | ||
e5de25dc | 1160 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1161 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1162 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1163 | */ |
681e683f | 1164 | static void geneve_push_rx_ports(struct net_device *dev) |
05ca4029 SA |
1165 | { |
1166 | struct net *net = dev_net(dev); | |
1167 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1168 | struct geneve_sock *gs; | |
681e683f | 1169 | |
05ca4029 | 1170 | rcu_read_lock(); |
e7b3db5e AD |
1171 | list_for_each_entry_rcu(gs, &gn->sock_list, list) |
1172 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1173 | UDP_TUNNEL_TYPE_GENEVE); | |
05ca4029 SA |
1174 | rcu_read_unlock(); |
1175 | } | |
05ca4029 | 1176 | |
2d07dc79 JL |
1177 | /* Initialize the device structure. */ |
1178 | static void geneve_setup(struct net_device *dev) | |
1179 | { | |
1180 | ether_setup(dev); | |
1181 | ||
1182 | dev->netdev_ops = &geneve_netdev_ops; | |
1183 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1184 | dev->destructor = free_netdev; | |
1185 | ||
1186 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1187 | ||
2d07dc79 JL |
1188 | dev->features |= NETIF_F_LLTX; |
1189 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1190 | dev->features |= NETIF_F_RXCSUM; | |
1191 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1192 | ||
2d07dc79 JL |
1193 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1194 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 JL |
1195 | |
1196 | netif_keep_dst(dev); | |
fc41cdb3 | 1197 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1198 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1199 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1200 | } |
1201 | ||
1202 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1203 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1204 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1205 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1206 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1207 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1208 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1209 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1210 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1211 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1212 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1213 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1214 | }; |
1215 | ||
1216 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1217 | { | |
1218 | if (tb[IFLA_ADDRESS]) { | |
1219 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1220 | return -EINVAL; | |
1221 | ||
1222 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1223 | return -EADDRNOTAVAIL; | |
1224 | } | |
1225 | ||
1226 | if (!data) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | if (data[IFLA_GENEVE_ID]) { | |
1230 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1231 | ||
1232 | if (vni >= GENEVE_VID_MASK) | |
1233 | return -ERANGE; | |
1234 | } | |
1235 | ||
1236 | return 0; | |
1237 | } | |
1238 | ||
371bd106 PS |
1239 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
1240 | __be16 dst_port, | |
8ed66f0e | 1241 | union geneve_addr *remote, |
371bd106 PS |
1242 | u8 vni[], |
1243 | bool *tun_on_same_port, | |
1244 | bool *tun_collect_md) | |
1245 | { | |
1246 | struct geneve_dev *geneve, *t; | |
1247 | ||
1248 | *tun_on_same_port = false; | |
1249 | *tun_collect_md = false; | |
1250 | t = NULL; | |
1251 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1252 | if (geneve->dst_port == dst_port) { | |
1253 | *tun_collect_md = geneve->collect_md; | |
1254 | *tun_on_same_port = true; | |
1255 | } | |
1256 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
8ed66f0e | 1257 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
371bd106 PS |
1258 | dst_port == geneve->dst_port) |
1259 | t = geneve; | |
1260 | } | |
1261 | return t; | |
1262 | } | |
1263 | ||
e305ac6c | 1264 | static int geneve_configure(struct net *net, struct net_device *dev, |
8ed66f0e | 1265 | union geneve_addr *remote, |
8eb3b995 DB |
1266 | __u32 vni, __u8 ttl, __u8 tos, __be32 label, |
1267 | __be16 dst_port, bool metadata, u32 flags) | |
2d07dc79 JL |
1268 | { |
1269 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1270 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1271 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1272 | int err, encap_len; |
2d07dc79 | 1273 | |
8ed66f0e JL |
1274 | if (!remote) |
1275 | return -EINVAL; | |
1276 | if (metadata && | |
8eb3b995 | 1277 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label)) |
8ed66f0e | 1278 | return -EINVAL; |
2d07dc79 JL |
1279 | |
1280 | geneve->net = net; | |
1281 | geneve->dev = dev; | |
1282 | ||
2d07dc79 JL |
1283 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
1284 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1285 | geneve->vni[2] = vni & 0x000000ff; | |
1286 | ||
8ed66f0e JL |
1287 | if ((remote->sa.sa_family == AF_INET && |
1288 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1289 | (remote->sa.sa_family == AF_INET6 && | |
1290 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
2d07dc79 | 1291 | return -EINVAL; |
8eb3b995 DB |
1292 | if (label && remote->sa.sa_family != AF_INET6) |
1293 | return -EINVAL; | |
1294 | ||
8ed66f0e | 1295 | geneve->remote = *remote; |
2d07dc79 | 1296 | |
e305ac6c PS |
1297 | geneve->ttl = ttl; |
1298 | geneve->tos = tos; | |
8eb3b995 | 1299 | geneve->label = label; |
7bbe33ff | 1300 | geneve->dst_port = dst_port; |
e305ac6c | 1301 | geneve->collect_md = metadata; |
abe492b4 | 1302 | geneve->flags = flags; |
e305ac6c | 1303 | |
8ed66f0e | 1304 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
371bd106 PS |
1305 | &tun_on_same_port, &tun_collect_md); |
1306 | if (t) | |
1307 | return -EBUSY; | |
1308 | ||
184fc8b5 PA |
1309 | /* make enough headroom for basic scenario */ |
1310 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1311 | if (remote->sa.sa_family == AF_INET) | |
1312 | encap_len += sizeof(struct iphdr); | |
1313 | else | |
1314 | encap_len += sizeof(struct ipv6hdr); | |
1315 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1316 | ||
371bd106 PS |
1317 | if (metadata) { |
1318 | if (tun_on_same_port) | |
1319 | return -EPERM; | |
1320 | } else { | |
1321 | if (tun_collect_md) | |
1322 | return -EPERM; | |
1323 | } | |
1324 | ||
468dfffc PA |
1325 | dst_cache_reset(&geneve->dst_cache); |
1326 | ||
2d07dc79 JL |
1327 | err = register_netdevice(dev); |
1328 | if (err) | |
1329 | return err; | |
1330 | ||
e305ac6c | 1331 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1332 | return 0; |
1333 | } | |
1334 | ||
1335 | static int geneve_newlink(struct net *net, struct net_device *dev, | |
1336 | struct nlattr *tb[], struct nlattr *data[]) | |
1337 | { | |
7bbe33ff | 1338 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
e305ac6c PS |
1339 | __u8 ttl = 0, tos = 0; |
1340 | bool metadata = false; | |
8ed66f0e | 1341 | union geneve_addr remote = geneve_remote_unspec; |
8eb3b995 | 1342 | __be32 label = 0; |
e277de5f | 1343 | __u32 vni = 0; |
abe492b4 | 1344 | u32 flags = 0; |
e305ac6c | 1345 | |
8ed66f0e JL |
1346 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1347 | return -EINVAL; | |
1348 | ||
1349 | if (data[IFLA_GENEVE_REMOTE]) { | |
1350 | remote.sa.sa_family = AF_INET; | |
1351 | remote.sin.sin_addr.s_addr = | |
1352 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1353 | } | |
1354 | ||
1355 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1356 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1357 | return -EPFNOSUPPORT; | |
1358 | ||
1359 | remote.sa.sa_family = AF_INET6; | |
1360 | remote.sin6.sin6_addr = | |
1361 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1362 | ||
1363 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1364 | IPV6_ADDR_LINKLOCAL) { | |
1365 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1366 | return -EINVAL; | |
1367 | } | |
1368 | } | |
1369 | ||
e277de5f JG |
1370 | if (data[IFLA_GENEVE_ID]) |
1371 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e305ac6c | 1372 | |
8760ce58 | 1373 | if (data[IFLA_GENEVE_TTL]) |
e305ac6c | 1374 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1375 | |
d8951125 | 1376 | if (data[IFLA_GENEVE_TOS]) |
e305ac6c | 1377 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1378 | |
8eb3b995 DB |
1379 | if (data[IFLA_GENEVE_LABEL]) |
1380 | label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1381 | IPV6_FLOWLABEL_MASK; | |
1382 | ||
e305ac6c | 1383 | if (data[IFLA_GENEVE_PORT]) |
7bbe33ff | 1384 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1385 | |
e305ac6c PS |
1386 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1387 | metadata = true; | |
2d07dc79 | 1388 | |
abe492b4 | 1389 | if (data[IFLA_GENEVE_UDP_CSUM] && |
14f1f724 AD |
1390 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1391 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; | |
abe492b4 TH |
1392 | |
1393 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1394 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1395 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1396 | ||
1397 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1398 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1399 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1400 | ||
8eb3b995 DB |
1401 | return geneve_configure(net, dev, &remote, vni, ttl, tos, label, |
1402 | dst_port, metadata, flags); | |
2d07dc79 JL |
1403 | } |
1404 | ||
1405 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1406 | { | |
1407 | struct geneve_dev *geneve = netdev_priv(dev); | |
1408 | ||
2d07dc79 JL |
1409 | list_del(&geneve->next); |
1410 | unregister_netdevice_queue(dev, head); | |
1411 | } | |
1412 | ||
1413 | static size_t geneve_get_size(const struct net_device *dev) | |
1414 | { | |
1415 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1416 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1417 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1418 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
8eb3b995 | 1419 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1420 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1421 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1422 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1423 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1424 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1425 | 0; |
1426 | } | |
1427 | ||
1428 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1429 | { | |
1430 | struct geneve_dev *geneve = netdev_priv(dev); | |
1431 | __u32 vni; | |
1432 | ||
1433 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1434 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1435 | goto nla_put_failure; | |
1436 | ||
8ed66f0e JL |
1437 | if (geneve->remote.sa.sa_family == AF_INET) { |
1438 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1439 | geneve->remote.sin.sin_addr.s_addr)) | |
1440 | goto nla_put_failure; | |
1441 | #if IS_ENABLED(CONFIG_IPV6) | |
1442 | } else { | |
1443 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1444 | &geneve->remote.sin6.sin6_addr)) | |
1445 | goto nla_put_failure; | |
1446 | #endif | |
1447 | } | |
2d07dc79 | 1448 | |
d8951125 | 1449 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
8eb3b995 DB |
1450 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) || |
1451 | nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label)) | |
8760ce58 JL |
1452 | goto nla_put_failure; |
1453 | ||
7bbe33ff | 1454 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) |
cd7918b3 PS |
1455 | goto nla_put_failure; |
1456 | ||
e305ac6c PS |
1457 | if (geneve->collect_md) { |
1458 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1459 | goto nla_put_failure; | |
1460 | } | |
1461 | ||
abe492b4 | 1462 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
14f1f724 | 1463 | !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) || |
abe492b4 TH |
1464 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1465 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1466 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1467 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1468 | goto nla_put_failure; | |
1469 | ||
2d07dc79 JL |
1470 | return 0; |
1471 | ||
1472 | nla_put_failure: | |
1473 | return -EMSGSIZE; | |
1474 | } | |
1475 | ||
1476 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1477 | .kind = "geneve", | |
1478 | .maxtype = IFLA_GENEVE_MAX, | |
1479 | .policy = geneve_policy, | |
1480 | .priv_size = sizeof(struct geneve_dev), | |
1481 | .setup = geneve_setup, | |
1482 | .validate = geneve_validate, | |
1483 | .newlink = geneve_newlink, | |
1484 | .dellink = geneve_dellink, | |
1485 | .get_size = geneve_get_size, | |
1486 | .fill_info = geneve_fill_info, | |
1487 | }; | |
1488 | ||
e305ac6c PS |
1489 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1490 | u8 name_assign_type, u16 dst_port) | |
1491 | { | |
1492 | struct nlattr *tb[IFLA_MAX + 1]; | |
1493 | struct net_device *dev; | |
106da663 | 1494 | LIST_HEAD(list_kill); |
e305ac6c PS |
1495 | int err; |
1496 | ||
1497 | memset(tb, 0, sizeof(tb)); | |
1498 | dev = rtnl_create_link(net, name, name_assign_type, | |
1499 | &geneve_link_ops, tb); | |
1500 | if (IS_ERR(dev)) | |
1501 | return dev; | |
1502 | ||
8ed66f0e | 1503 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
8eb3b995 | 1504 | 0, 0, 0, 0, htons(dst_port), true, |
c868ee70 | 1505 | GENEVE_F_UDP_ZERO_CSUM6_RX); |
106da663 ND |
1506 | if (err) { |
1507 | free_netdev(dev); | |
1508 | return ERR_PTR(err); | |
1509 | } | |
7e059158 DW |
1510 | |
1511 | /* openvswitch users expect packet sizes to be unrestricted, | |
1512 | * so set the largest MTU we can. | |
1513 | */ | |
aeee0e66 | 1514 | err = __geneve_change_mtu(dev, IP_MAX_MTU, false); |
7e059158 DW |
1515 | if (err) |
1516 | goto err; | |
1517 | ||
41009481 ND |
1518 | err = rtnl_configure_link(dev, NULL); |
1519 | if (err < 0) | |
1520 | goto err; | |
1521 | ||
e305ac6c | 1522 | return dev; |
7e059158 DW |
1523 | |
1524 | err: | |
106da663 ND |
1525 | geneve_dellink(dev, &list_kill); |
1526 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1527 | return ERR_PTR(err); |
e305ac6c PS |
1528 | } |
1529 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1530 | ||
681e683f HFS |
1531 | static int geneve_netdevice_event(struct notifier_block *unused, |
1532 | unsigned long event, void *ptr) | |
1533 | { | |
1534 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1535 | ||
7c46a640 | 1536 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
681e683f HFS |
1537 | geneve_push_rx_ports(dev); |
1538 | ||
1539 | return NOTIFY_DONE; | |
1540 | } | |
1541 | ||
1542 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1543 | .notifier_call = geneve_netdevice_event, | |
1544 | }; | |
1545 | ||
2d07dc79 JL |
1546 | static __net_init int geneve_init_net(struct net *net) |
1547 | { | |
1548 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1549 | |
1550 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1551 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1552 | return 0; |
1553 | } | |
1554 | ||
1555 | static void __net_exit geneve_exit_net(struct net *net) | |
1556 | { | |
1557 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1558 | struct geneve_dev *geneve, *next; | |
1559 | struct net_device *dev, *aux; | |
1560 | LIST_HEAD(list); | |
1561 | ||
1562 | rtnl_lock(); | |
1563 | ||
1564 | /* gather any geneve devices that were moved into this ns */ | |
1565 | for_each_netdev_safe(net, dev, aux) | |
1566 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1567 | unregister_netdevice_queue(dev, &list); | |
1568 | ||
1569 | /* now gather any other geneve devices that were created in this ns */ | |
1570 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1571 | /* If geneve->dev is in the same netns, it was already added | |
1572 | * to the list by the previous loop. | |
1573 | */ | |
1574 | if (!net_eq(dev_net(geneve->dev), net)) | |
1575 | unregister_netdevice_queue(geneve->dev, &list); | |
1576 | } | |
1577 | ||
1578 | /* unregister the devices gathered above */ | |
1579 | unregister_netdevice_many(&list); | |
1580 | rtnl_unlock(); | |
1581 | } | |
1582 | ||
1583 | static struct pernet_operations geneve_net_ops = { | |
1584 | .init = geneve_init_net, | |
1585 | .exit = geneve_exit_net, | |
1586 | .id = &geneve_net_id, | |
1587 | .size = sizeof(struct geneve_net), | |
1588 | }; | |
1589 | ||
1590 | static int __init geneve_init_module(void) | |
1591 | { | |
1592 | int rc; | |
1593 | ||
1594 | rc = register_pernet_subsys(&geneve_net_ops); | |
1595 | if (rc) | |
1596 | goto out1; | |
1597 | ||
681e683f | 1598 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1599 | if (rc) |
1600 | goto out2; | |
1601 | ||
681e683f HFS |
1602 | rc = rtnl_link_register(&geneve_link_ops); |
1603 | if (rc) | |
1604 | goto out3; | |
1605 | ||
2d07dc79 | 1606 | return 0; |
681e683f HFS |
1607 | |
1608 | out3: | |
1609 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1610 | out2: |
1611 | unregister_pernet_subsys(&geneve_net_ops); | |
1612 | out1: | |
1613 | return rc; | |
1614 | } | |
1615 | late_initcall(geneve_init_module); | |
1616 | ||
1617 | static void __exit geneve_cleanup_module(void) | |
1618 | { | |
1619 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1620 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1621 | unregister_pernet_subsys(&geneve_net_ops); |
1622 | } | |
1623 | module_exit(geneve_cleanup_module); | |
1624 | ||
1625 | MODULE_LICENSE("GPL"); | |
1626 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1627 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1628 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1629 | MODULE_ALIAS_RTNL_LINK("geneve"); |