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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 | ||
c7d03a00 | 46 | static unsigned int geneve_net_id; |
371bd106 | 47 | |
2d07dc79 JL |
48 | /* Pseudo network device */ |
49 | struct geneve_dev { | |
50 | struct hlist_node hlist; /* vni hash table */ | |
51 | struct net *net; /* netns for packet i/o */ | |
52 | struct net_device *dev; /* netdev for geneve tunnel */ | |
9b4437a5 | 53 | struct ip_tunnel_info info; |
fceb9c3e | 54 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 55 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 56 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 57 | #endif |
2d07dc79 | 58 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 59 | struct gro_cells gro_cells; |
9b4437a5 | 60 | bool collect_md; |
61 | bool use_udp6_rx_checksums; | |
2d07dc79 JL |
62 | }; |
63 | ||
371bd106 PS |
64 | struct geneve_sock { |
65 | bool collect_md; | |
371bd106 PS |
66 | struct list_head list; |
67 | struct socket *sock; | |
68 | struct rcu_head rcu; | |
69 | int refcnt; | |
66d47003 | 70 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 71 | }; |
2d07dc79 JL |
72 | |
73 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
74 | { | |
75 | __u32 vnid; | |
76 | ||
77 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
78 | return hash_32(vnid, VNI_HASH_BITS); | |
79 | } | |
80 | ||
e305ac6c PS |
81 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
82 | { | |
83 | #ifdef __BIG_ENDIAN | |
84 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
85 | #else | |
86 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
87 | ((__force u64)vni[1] << 48) | | |
88 | ((__force u64)vni[2] << 56)); | |
89 | #endif | |
90 | } | |
91 | ||
9b4437a5 | 92 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
93 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
94 | { | |
95 | #ifdef __BIG_ENDIAN | |
96 | vni[0] = (__force __u8)(tun_id >> 16); | |
97 | vni[1] = (__force __u8)(tun_id >> 8); | |
98 | vni[2] = (__force __u8)tun_id; | |
99 | #else | |
100 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
101 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
102 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
103 | #endif | |
104 | } | |
105 | ||
1e9f12ec JB |
106 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
107 | { | |
108 | return gs->sock->sk->sk_family; | |
109 | } | |
110 | ||
66d47003 | 111 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 112 | __be32 addr, u8 vni[]) |
2d07dc79 | 113 | { |
9b4437a5 | 114 | __be64 id = vni_to_tunnel_id(vni); |
2d07dc79 | 115 | struct hlist_head *vni_list_head; |
e305ac6c | 116 | struct geneve_dev *geneve; |
2d07dc79 JL |
117 | __u32 hash; |
118 | ||
2d07dc79 | 119 | /* Find the device for this VNI */ |
371bd106 | 120 | hash = geneve_net_vni_hash(vni); |
66d47003 | 121 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 122 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
9b4437a5 | 123 | if (!memcmp(&id, &geneve->info.key.tun_id, sizeof(id)) && |
124 | addr == geneve->info.key.u.ipv4.dst) | |
8ed66f0e JL |
125 | return geneve; |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | #if IS_ENABLED(CONFIG_IPV6) | |
131 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
132 | struct in6_addr addr6, u8 vni[]) | |
133 | { | |
9b4437a5 | 134 | __be64 id = vni_to_tunnel_id(vni); |
8ed66f0e JL |
135 | struct hlist_head *vni_list_head; |
136 | struct geneve_dev *geneve; | |
137 | __u32 hash; | |
138 | ||
139 | /* Find the device for this VNI */ | |
140 | hash = geneve_net_vni_hash(vni); | |
141 | vni_list_head = &gs->vni_list[hash]; | |
142 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
9b4437a5 | 143 | if (!memcmp(&id, &geneve->info.key.tun_id, sizeof(id)) && |
144 | ipv6_addr_equal(&addr6, &geneve->info.key.u.ipv6.dst)) | |
e305ac6c | 145 | return geneve; |
2d07dc79 | 146 | } |
e305ac6c PS |
147 | return NULL; |
148 | } | |
8ed66f0e | 149 | #endif |
e305ac6c | 150 | |
371bd106 PS |
151 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
152 | { | |
153 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
154 | } | |
155 | ||
9fc47545 JB |
156 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
157 | struct sk_buff *skb) | |
e305ac6c | 158 | { |
8ed66f0e | 159 | static u8 zero_vni[3]; |
9b4437a5 | 160 | u8 *vni; |
e305ac6c | 161 | |
1e9f12ec | 162 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 163 | struct iphdr *iph; |
9b4437a5 | 164 | __be32 addr; |
9fc47545 | 165 | |
8ed66f0e | 166 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 167 | |
8ed66f0e JL |
168 | if (gs->collect_md) { |
169 | vni = zero_vni; | |
170 | addr = 0; | |
171 | } else { | |
9fc47545 | 172 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
173 | addr = iph->saddr; |
174 | } | |
175 | ||
9fc47545 | 176 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 177 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 178 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 179 | static struct in6_addr zero_addr6; |
9fc47545 JB |
180 | struct ipv6hdr *ip6h; |
181 | struct in6_addr addr6; | |
182 | ||
8ed66f0e | 183 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 184 | |
8ed66f0e JL |
185 | if (gs->collect_md) { |
186 | vni = zero_vni; | |
187 | addr6 = zero_addr6; | |
188 | } else { | |
9fc47545 | 189 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
190 | addr6 = ip6h->saddr; |
191 | } | |
192 | ||
9fc47545 | 193 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
194 | #endif |
195 | } | |
9fc47545 JB |
196 | return NULL; |
197 | } | |
198 | ||
199 | /* geneve receive/decap routine */ | |
200 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
201 | struct sk_buff *skb) | |
202 | { | |
203 | struct genevehdr *gnvh = geneve_hdr(skb); | |
204 | struct metadata_dst *tun_dst = NULL; | |
205 | struct pcpu_sw_netstats *stats; | |
206 | int err = 0; | |
207 | void *oiph; | |
2d07dc79 | 208 | |
371bd106 | 209 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 210 | __be16 flags; |
e305ac6c PS |
211 | |
212 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
213 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
214 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
215 | ||
1e9f12ec | 216 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
217 | vni_to_tunnel_id(gnvh->vni), |
218 | gnvh->opt_len * 4); | |
219 | if (!tun_dst) | |
220 | goto drop; | |
e305ac6c | 221 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
222 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
223 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
224 | } else { |
225 | /* Drop packets w/ critical options, | |
226 | * since we don't support any... | |
227 | */ | |
228 | if (gnvh->critical) | |
229 | goto drop; | |
230 | } | |
2d07dc79 JL |
231 | |
232 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
233 | skb->protocol = eth_type_trans(skb, geneve->dev); |
234 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
235 | ||
e305ac6c PS |
236 | if (tun_dst) |
237 | skb_dst_set(skb, &tun_dst->dst); | |
238 | ||
2d07dc79 JL |
239 | /* Ignore packet loops (and multicast echo) */ |
240 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
241 | goto drop; | |
242 | ||
9fc47545 | 243 | oiph = skb_network_header(skb); |
2d07dc79 JL |
244 | skb_reset_network_header(skb); |
245 | ||
9fc47545 JB |
246 | if (geneve_get_sk_family(gs) == AF_INET) |
247 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 248 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
249 | else |
250 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 251 | #endif |
2d07dc79 JL |
252 | |
253 | if (unlikely(err)) { | |
8ed66f0e | 254 | if (log_ecn_error) { |
9fc47545 | 255 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
256 | net_info_ratelimited("non-ECT from %pI4 " |
257 | "with TOS=%#x\n", | |
9fc47545 JB |
258 | &((struct iphdr *)oiph)->saddr, |
259 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 260 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 261 | else |
8ed66f0e | 262 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 263 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
264 | #endif |
265 | } | |
2d07dc79 JL |
266 | if (err > 1) { |
267 | ++geneve->dev->stats.rx_frame_errors; | |
268 | ++geneve->dev->stats.rx_errors; | |
269 | goto drop; | |
270 | } | |
271 | } | |
272 | ||
273 | stats = this_cpu_ptr(geneve->dev->tstats); | |
274 | u64_stats_update_begin(&stats->syncp); | |
275 | stats->rx_packets++; | |
276 | stats->rx_bytes += skb->len; | |
277 | u64_stats_update_end(&stats->syncp); | |
278 | ||
8e816df8 | 279 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
280 | return; |
281 | drop: | |
282 | /* Consume bad packet */ | |
283 | kfree_skb(skb); | |
284 | } | |
285 | ||
286 | /* Setup stats when device is created */ | |
287 | static int geneve_init(struct net_device *dev) | |
288 | { | |
8e816df8 JG |
289 | struct geneve_dev *geneve = netdev_priv(dev); |
290 | int err; | |
291 | ||
2d07dc79 JL |
292 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
293 | if (!dev->tstats) | |
294 | return -ENOMEM; | |
8e816df8 JG |
295 | |
296 | err = gro_cells_init(&geneve->gro_cells, dev); | |
297 | if (err) { | |
298 | free_percpu(dev->tstats); | |
299 | return err; | |
300 | } | |
301 | ||
9b4437a5 | 302 | err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL); |
468dfffc PA |
303 | if (err) { |
304 | free_percpu(dev->tstats); | |
305 | gro_cells_destroy(&geneve->gro_cells); | |
306 | return err; | |
307 | } | |
2d07dc79 JL |
308 | return 0; |
309 | } | |
310 | ||
311 | static void geneve_uninit(struct net_device *dev) | |
312 | { | |
8e816df8 JG |
313 | struct geneve_dev *geneve = netdev_priv(dev); |
314 | ||
9b4437a5 | 315 | dst_cache_destroy(&geneve->info.dst_cache); |
8e816df8 | 316 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
317 | free_percpu(dev->tstats); |
318 | } | |
319 | ||
371bd106 PS |
320 | /* Callback from net/ipv4/udp.c to receive packets */ |
321 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
322 | { | |
323 | struct genevehdr *geneveh; | |
9fc47545 | 324 | struct geneve_dev *geneve; |
371bd106 PS |
325 | struct geneve_sock *gs; |
326 | int opts_len; | |
327 | ||
328 | /* Need Geneve and inner Ethernet header to be present */ | |
329 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
e5aed006 | 330 | goto drop; |
371bd106 PS |
331 | |
332 | /* Return packets with reserved bits set */ | |
333 | geneveh = geneve_hdr(skb); | |
334 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 335 | goto drop; |
371bd106 PS |
336 | |
337 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 338 | goto drop; |
371bd106 | 339 | |
9fc47545 JB |
340 | gs = rcu_dereference_sk_user_data(sk); |
341 | if (!gs) | |
342 | goto drop; | |
343 | ||
344 | geneve = geneve_lookup_skb(gs, skb); | |
345 | if (!geneve) | |
346 | goto drop; | |
347 | ||
371bd106 PS |
348 | opts_len = geneveh->opt_len * 4; |
349 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 JB |
350 | htons(ETH_P_TEB), |
351 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
371bd106 PS |
352 | goto drop; |
353 | ||
9fc47545 | 354 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
355 | return 0; |
356 | ||
357 | drop: | |
358 | /* Consume bad packet */ | |
359 | kfree_skb(skb); | |
360 | return 0; | |
371bd106 PS |
361 | } |
362 | ||
363 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
9b4437a5 | 364 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
365 | { |
366 | struct socket *sock; | |
367 | struct udp_port_cfg udp_conf; | |
368 | int err; | |
369 | ||
370 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
371 | ||
372 | if (ipv6) { | |
373 | udp_conf.family = AF_INET6; | |
8ed66f0e | 374 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 375 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
376 | } else { |
377 | udp_conf.family = AF_INET; | |
378 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
379 | } | |
380 | ||
381 | udp_conf.local_udp_port = port; | |
382 | ||
383 | /* Open UDP socket */ | |
384 | err = udp_sock_create(net, &udp_conf, &sock); | |
385 | if (err < 0) | |
386 | return ERR_PTR(err); | |
387 | ||
388 | return sock; | |
389 | } | |
390 | ||
371bd106 PS |
391 | static int geneve_hlen(struct genevehdr *gh) |
392 | { | |
393 | return sizeof(*gh) + gh->opt_len * 4; | |
394 | } | |
395 | ||
4a0090a9 TH |
396 | static struct sk_buff **geneve_gro_receive(struct sock *sk, |
397 | struct sk_buff **head, | |
398 | struct sk_buff *skb) | |
371bd106 PS |
399 | { |
400 | struct sk_buff *p, **pp = NULL; | |
401 | struct genevehdr *gh, *gh2; | |
402 | unsigned int hlen, gh_len, off_gnv; | |
403 | const struct packet_offload *ptype; | |
404 | __be16 type; | |
405 | int flush = 1; | |
406 | ||
407 | off_gnv = skb_gro_offset(skb); | |
408 | hlen = off_gnv + sizeof(*gh); | |
409 | gh = skb_gro_header_fast(skb, off_gnv); | |
410 | if (skb_gro_header_hard(skb, hlen)) { | |
411 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
412 | if (unlikely(!gh)) | |
413 | goto out; | |
414 | } | |
415 | ||
416 | if (gh->ver != GENEVE_VER || gh->oam) | |
417 | goto out; | |
418 | gh_len = geneve_hlen(gh); | |
419 | ||
420 | hlen = off_gnv + gh_len; | |
421 | if (skb_gro_header_hard(skb, hlen)) { | |
422 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
423 | if (unlikely(!gh)) | |
424 | goto out; | |
425 | } | |
426 | ||
371bd106 PS |
427 | for (p = *head; p; p = p->next) { |
428 | if (!NAPI_GRO_CB(p)->same_flow) | |
429 | continue; | |
430 | ||
431 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
432 | if (gh->opt_len != gh2->opt_len || | |
433 | memcmp(gh, gh2, gh_len)) { | |
434 | NAPI_GRO_CB(p)->same_flow = 0; | |
435 | continue; | |
436 | } | |
437 | } | |
438 | ||
439 | type = gh->proto_type; | |
440 | ||
441 | rcu_read_lock(); | |
442 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 443 | if (!ptype) |
371bd106 | 444 | goto out_unlock; |
371bd106 PS |
445 | |
446 | skb_gro_pull(skb, gh_len); | |
447 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 448 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 449 | flush = 0; |
371bd106 PS |
450 | |
451 | out_unlock: | |
452 | rcu_read_unlock(); | |
453 | out: | |
454 | NAPI_GRO_CB(skb)->flush |= flush; | |
455 | ||
456 | return pp; | |
457 | } | |
458 | ||
4a0090a9 TH |
459 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
460 | int nhoff) | |
371bd106 PS |
461 | { |
462 | struct genevehdr *gh; | |
463 | struct packet_offload *ptype; | |
464 | __be16 type; | |
465 | int gh_len; | |
466 | int err = -ENOSYS; | |
467 | ||
371bd106 PS |
468 | gh = (struct genevehdr *)(skb->data + nhoff); |
469 | gh_len = geneve_hlen(gh); | |
470 | type = gh->proto_type; | |
471 | ||
472 | rcu_read_lock(); | |
473 | ptype = gro_find_complete_by_type(type); | |
474 | if (ptype) | |
475 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
476 | ||
477 | rcu_read_unlock(); | |
229740c6 JR |
478 | |
479 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
480 | ||
371bd106 PS |
481 | return err; |
482 | } | |
483 | ||
484 | /* Create new listen socket if needed */ | |
485 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 486 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
487 | { |
488 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
489 | struct geneve_sock *gs; | |
490 | struct socket *sock; | |
491 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 492 | int h; |
371bd106 PS |
493 | |
494 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
495 | if (!gs) | |
496 | return ERR_PTR(-ENOMEM); | |
497 | ||
9b4437a5 | 498 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
499 | if (IS_ERR(sock)) { |
500 | kfree(gs); | |
501 | return ERR_CAST(sock); | |
502 | } | |
503 | ||
504 | gs->sock = sock; | |
505 | gs->refcnt = 1; | |
66d47003 PS |
506 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
507 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
508 | |
509 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 510 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
511 | |
512 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 513 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
514 | tunnel_cfg.sk_user_data = gs; |
515 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
516 | tunnel_cfg.gro_receive = geneve_gro_receive; |
517 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 PS |
518 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
519 | tunnel_cfg.encap_destroy = NULL; | |
520 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
521 | list_add(&gs->list, &gn->sock_list); |
522 | return gs; | |
523 | } | |
524 | ||
8ed66f0e | 525 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 526 | { |
8ed66f0e | 527 | if (!gs || --gs->refcnt) |
371bd106 PS |
528 | return; |
529 | ||
530 | list_del(&gs->list); | |
e7b3db5e | 531 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
532 | udp_tunnel_sock_release(gs->sock); |
533 | kfree_rcu(gs, rcu); | |
534 | } | |
535 | ||
8ed66f0e JL |
536 | static void geneve_sock_release(struct geneve_dev *geneve) |
537 | { | |
fceb9c3e | 538 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 539 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 540 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
541 | ||
542 | rcu_assign_pointer(geneve->sock6, NULL); | |
543 | #endif | |
544 | ||
545 | rcu_assign_pointer(geneve->sock4, NULL); | |
546 | synchronize_net(); | |
547 | ||
548 | __geneve_sock_release(gs4); | |
549 | #if IS_ENABLED(CONFIG_IPV6) | |
550 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
551 | #endif |
552 | } | |
553 | ||
371bd106 | 554 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 555 | sa_family_t family, |
371bd106 PS |
556 | __be16 dst_port) |
557 | { | |
558 | struct geneve_sock *gs; | |
559 | ||
560 | list_for_each_entry(gs, &gn->sock_list, list) { | |
561 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 562 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
563 | return gs; |
564 | } | |
565 | } | |
566 | return NULL; | |
567 | } | |
568 | ||
8ed66f0e | 569 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 570 | { |
2d07dc79 | 571 | struct net *net = geneve->net; |
371bd106 | 572 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 573 | struct geneve_sock *gs; |
9b4437a5 | 574 | __u8 vni[3]; |
66d47003 | 575 | __u32 hash; |
2d07dc79 | 576 | |
9b4437a5 | 577 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst); |
371bd106 PS |
578 | if (gs) { |
579 | gs->refcnt++; | |
580 | goto out; | |
581 | } | |
582 | ||
9b4437a5 | 583 | gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6, |
584 | geneve->use_udp6_rx_checksums); | |
2d07dc79 JL |
585 | if (IS_ERR(gs)) |
586 | return PTR_ERR(gs); | |
587 | ||
371bd106 PS |
588 | out: |
589 | gs->collect_md = geneve->collect_md; | |
8ed66f0e JL |
590 | #if IS_ENABLED(CONFIG_IPV6) |
591 | if (ipv6) | |
fceb9c3e | 592 | rcu_assign_pointer(geneve->sock6, gs); |
8ed66f0e JL |
593 | else |
594 | #endif | |
fceb9c3e | 595 | rcu_assign_pointer(geneve->sock4, gs); |
66d47003 | 596 | |
9b4437a5 | 597 | tunnel_id_to_vni(geneve->info.key.tun_id, vni); |
598 | hash = geneve_net_vni_hash(vni); | |
66d47003 | 599 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
600 | return 0; |
601 | } | |
602 | ||
8ed66f0e JL |
603 | static int geneve_open(struct net_device *dev) |
604 | { | |
605 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 606 | bool ipv6 = !!(geneve->info.mode & IP_TUNNEL_INFO_IPV6); |
8ed66f0e JL |
607 | bool metadata = geneve->collect_md; |
608 | int ret = 0; | |
609 | ||
8ed66f0e | 610 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
611 | if (ipv6 || metadata) |
612 | ret = geneve_sock_add(geneve, true); | |
613 | #endif | |
614 | if (!ret && (!ipv6 || metadata)) | |
615 | ret = geneve_sock_add(geneve, false); | |
616 | if (ret < 0) | |
617 | geneve_sock_release(geneve); | |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
2d07dc79 JL |
622 | static int geneve_stop(struct net_device *dev) |
623 | { | |
624 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 625 | |
66d47003 PS |
626 | if (!hlist_unhashed(&geneve->hlist)) |
627 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 628 | geneve_sock_release(geneve); |
371bd106 PS |
629 | return 0; |
630 | } | |
631 | ||
8ed66f0e | 632 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 633 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
634 | { |
635 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 636 | geneveh->opt_len = info->options_len / 4; |
637 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
638 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 639 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 640 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
641 | geneveh->proto_type = htons(ETH_P_TEB); |
642 | geneveh->rsvd2 = 0; | |
643 | ||
c3ef5aa5 | 644 | ip_tunnel_info_opts_get(geneveh->options, info); |
8ed66f0e JL |
645 | } |
646 | ||
c3ef5aa5 | 647 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
648 | const struct ip_tunnel_info *info, | |
649 | bool xnet, int ip_hdr_len) | |
371bd106 | 650 | { |
c3ef5aa5 | 651 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
652 | struct genevehdr *gnvh; |
653 | int min_headroom; | |
654 | int err; | |
655 | ||
c3ef5aa5 | 656 | skb_reset_mac_header(skb); |
8ed66f0e JL |
657 | skb_scrub_packet(skb, xnet); |
658 | ||
c3ef5aa5 | 659 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
660 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 661 | err = skb_cow_head(skb, min_headroom); |
aed069df | 662 | if (unlikely(err)) |
8ed66f0e | 663 | goto free_dst; |
8ed66f0e | 664 | |
aed069df | 665 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 666 | if (err) |
8ed66f0e | 667 | goto free_dst; |
8ed66f0e | 668 | |
c3ef5aa5 | 669 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + |
670 | info->options_len); | |
671 | geneve_build_header(gnvh, info); | |
8ed66f0e JL |
672 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
673 | return 0; | |
674 | ||
675 | free_dst: | |
676 | dst_release(dst); | |
677 | return err; | |
678 | } | |
8ed66f0e JL |
679 | |
680 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
681 | struct net_device *dev, | |
682 | struct flowi4 *fl4, | |
c3ef5aa5 | 683 | const struct ip_tunnel_info *info) |
e305ac6c | 684 | { |
db3c6139 | 685 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 686 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 687 | struct dst_cache *dst_cache; |
e305ac6c PS |
688 | struct rtable *rt = NULL; |
689 | __u8 tos; | |
690 | ||
fceb9c3e | 691 | if (!rcu_dereference(geneve->sock4)) |
692 | return ERR_PTR(-EIO); | |
693 | ||
e305ac6c PS |
694 | memset(fl4, 0, sizeof(*fl4)); |
695 | fl4->flowi4_mark = skb->mark; | |
696 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 697 | fl4->daddr = info->key.u.ipv4.dst; |
698 | fl4->saddr = info->key.u.ipv4.src; | |
e305ac6c | 699 | |
9b4437a5 | 700 | tos = info->key.tos; |
701 | if ((tos == 1) && !geneve->collect_md) { | |
702 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
703 | use_cache = false; | |
468dfffc | 704 | } |
9b4437a5 | 705 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 706 | |
c3ef5aa5 | 707 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
708 | if (use_cache) { |
709 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
710 | if (rt) | |
711 | return rt; | |
e305ac6c | 712 | } |
e305ac6c PS |
713 | rt = ip_route_output_key(geneve->net, fl4); |
714 | if (IS_ERR(rt)) { | |
715 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 716 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
717 | } |
718 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
719 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 720 | ip_rt_put(rt); |
fc4099f1 | 721 | return ERR_PTR(-ELOOP); |
e305ac6c | 722 | } |
468dfffc PA |
723 | if (use_cache) |
724 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
725 | return rt; |
726 | } | |
727 | ||
8ed66f0e JL |
728 | #if IS_ENABLED(CONFIG_IPV6) |
729 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
730 | struct net_device *dev, | |
731 | struct flowi6 *fl6, | |
c3ef5aa5 | 732 | const struct ip_tunnel_info *info) |
8ed66f0e | 733 | { |
db3c6139 | 734 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 735 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 736 | struct dst_entry *dst = NULL; |
468dfffc | 737 | struct dst_cache *dst_cache; |
fceb9c3e | 738 | struct geneve_sock *gs6; |
3a56f86f | 739 | __u8 prio; |
8ed66f0e | 740 | |
fceb9c3e | 741 | gs6 = rcu_dereference(geneve->sock6); |
742 | if (!gs6) | |
743 | return ERR_PTR(-EIO); | |
744 | ||
8ed66f0e JL |
745 | memset(fl6, 0, sizeof(*fl6)); |
746 | fl6->flowi6_mark = skb->mark; | |
747 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 748 | fl6->daddr = info->key.u.ipv6.dst; |
749 | fl6->saddr = info->key.u.ipv6.src; | |
750 | prio = info->key.tos; | |
751 | if ((prio == 1) && !geneve->collect_md) { | |
752 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
753 | use_cache = false; | |
468dfffc PA |
754 | } |
755 | ||
9b4437a5 | 756 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
757 | info->key.label); | |
c3ef5aa5 | 758 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
759 | if (use_cache) { |
760 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
761 | if (dst) | |
762 | return dst; | |
8ed66f0e | 763 | } |
8ed66f0e JL |
764 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { |
765 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
766 | return ERR_PTR(-ENETUNREACH); | |
767 | } | |
768 | if (dst->dev == dev) { /* is this necessary? */ | |
769 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
770 | dst_release(dst); | |
771 | return ERR_PTR(-ELOOP); | |
772 | } | |
773 | ||
468dfffc PA |
774 | if (use_cache) |
775 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
776 | return dst; |
777 | } | |
778 | #endif | |
779 | ||
9b4437a5 | 780 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 781 | struct geneve_dev *geneve, |
782 | const struct ip_tunnel_info *info) | |
2d07dc79 | 783 | { |
9b4437a5 | 784 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
785 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
786 | const struct ip_tunnel_key *key = &info->key; | |
787 | struct rtable *rt; | |
fc4099f1 | 788 | int err = -EINVAL; |
2d07dc79 | 789 | struct flowi4 fl4; |
8760ce58 | 790 | __u8 tos, ttl; |
e305ac6c | 791 | __be16 sport; |
371bd106 | 792 | __be16 df; |
2d07dc79 | 793 | |
fceb9c3e | 794 | if (!gs4) |
9b4437a5 | 795 | return err; |
980c394c | 796 | |
8ed66f0e | 797 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
9b4437a5 | 798 | if (IS_ERR(rt)) |
799 | return PTR_ERR(rt); | |
371bd106 PS |
800 | |
801 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
9b4437a5 | 802 | if (geneve->collect_md) { |
803 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
371bd106 | 804 | ttl = key->ttl; |
e305ac6c | 805 | } else { |
9b4437a5 | 806 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
807 | ttl = key->ttl ? : ip4_dst_hoplimit(&rt->dst); | |
2d07dc79 | 808 | } |
9b4437a5 | 809 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; |
2d07dc79 | 810 | |
c3ef5aa5 | 811 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 812 | if (unlikely(err)) |
813 | return err; | |
efeb2267 | 814 | |
9b4437a5 | 815 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
816 | tos, ttl, df, sport, geneve->info.key.tp_dst, | |
817 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
818 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
819 | return 0; | |
2d07dc79 JL |
820 | } |
821 | ||
8ed66f0e | 822 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 823 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 824 | struct geneve_dev *geneve, |
825 | const struct ip_tunnel_info *info) | |
8ed66f0e | 826 | { |
9b4437a5 | 827 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
828 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
829 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e JL |
830 | struct dst_entry *dst = NULL; |
831 | int err = -EINVAL; | |
832 | struct flowi6 fl6; | |
3a56f86f | 833 | __u8 prio, ttl; |
8ed66f0e | 834 | __be16 sport; |
8ed66f0e | 835 | |
fceb9c3e | 836 | if (!gs6) |
9b4437a5 | 837 | return err; |
8ed66f0e JL |
838 | |
839 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
9b4437a5 | 840 | if (IS_ERR(dst)) |
841 | return PTR_ERR(dst); | |
8ed66f0e JL |
842 | |
843 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
9b4437a5 | 844 | if (geneve->collect_md) { |
845 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
846 | ttl = key->ttl; | |
847 | } else { | |
848 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
849 | ip_hdr(skb), skb); | |
850 | ttl = key->ttl ? : ip6_dst_hoplimit(dst); | |
851 | } | |
c3ef5aa5 | 852 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 853 | if (unlikely(err)) |
854 | return err; | |
8ed66f0e | 855 | |
9b4437a5 | 856 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
857 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
858 | info->key.label, sport, geneve->info.key.tp_dst, | |
859 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
860 | return 0; | |
861 | } | |
862 | #endif | |
8ed66f0e | 863 | |
9b4437a5 | 864 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
865 | { | |
866 | struct geneve_dev *geneve = netdev_priv(dev); | |
867 | struct ip_tunnel_info *info = NULL; | |
868 | int err; | |
abe492b4 | 869 | |
9b4437a5 | 870 | if (geneve->collect_md) { |
871 | info = skb_tunnel_info(skb); | |
872 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
873 | err = -EINVAL; | |
874 | netdev_dbg(dev, "no tunnel metadata\n"); | |
aed069df | 875 | goto tx_error; |
9b4437a5 | 876 | } |
8ed66f0e | 877 | } else { |
9b4437a5 | 878 | info = &geneve->info; |
8ed66f0e | 879 | } |
8eb3b995 | 880 | |
9b4437a5 | 881 | #if IS_ENABLED(CONFIG_IPV6) |
882 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
883 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
884 | else | |
885 | #endif | |
886 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
8ed66f0e | 887 | |
9b4437a5 | 888 | if (likely(!err)) |
889 | return NETDEV_TX_OK; | |
8ed66f0e JL |
890 | tx_error: |
891 | dev_kfree_skb(skb); | |
aed069df | 892 | |
8ed66f0e JL |
893 | if (err == -ELOOP) |
894 | dev->stats.collisions++; | |
895 | else if (err == -ENETUNREACH) | |
896 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
897 | |
898 | dev->stats.tx_errors++; | |
8ed66f0e JL |
899 | return NETDEV_TX_OK; |
900 | } | |
8ed66f0e | 901 | |
91572088 | 902 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 903 | { |
91572088 JW |
904 | /* Only possible if called internally, ndo_change_mtu path's new_mtu |
905 | * is guaranteed to be between dev->min_mtu and dev->max_mtu. | |
55e5bfb5 | 906 | */ |
91572088 JW |
907 | if (new_mtu > dev->max_mtu) |
908 | new_mtu = dev->max_mtu; | |
aeee0e66 | 909 | |
55e5bfb5 DW |
910 | dev->mtu = new_mtu; |
911 | return 0; | |
912 | } | |
913 | ||
fc4099f1 PS |
914 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
915 | { | |
916 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
917 | struct geneve_dev *geneve = netdev_priv(dev); | |
fc4099f1 | 918 | |
b8812fa8 | 919 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 920 | struct rtable *rt; |
921 | struct flowi4 fl4; | |
922 | ||
b8812fa8 JL |
923 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
924 | if (IS_ERR(rt)) | |
925 | return PTR_ERR(rt); | |
fc4099f1 | 926 | |
b8812fa8 JL |
927 | ip_rt_put(rt); |
928 | info->key.u.ipv4.src = fl4.saddr; | |
929 | #if IS_ENABLED(CONFIG_IPV6) | |
930 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 931 | struct dst_entry *dst; |
932 | struct flowi6 fl6; | |
933 | ||
b8812fa8 JL |
934 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); |
935 | if (IS_ERR(dst)) | |
936 | return PTR_ERR(dst); | |
937 | ||
938 | dst_release(dst); | |
939 | info->key.u.ipv6.src = fl6.saddr; | |
940 | #endif | |
941 | } else { | |
942 | return -EINVAL; | |
943 | } | |
fc4099f1 | 944 | |
fc4099f1 PS |
945 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
946 | 1, USHRT_MAX, true); | |
9b4437a5 | 947 | info->key.tp_dst = geneve->info.key.tp_dst; |
fc4099f1 PS |
948 | return 0; |
949 | } | |
950 | ||
2d07dc79 JL |
951 | static const struct net_device_ops geneve_netdev_ops = { |
952 | .ndo_init = geneve_init, | |
953 | .ndo_uninit = geneve_uninit, | |
954 | .ndo_open = geneve_open, | |
955 | .ndo_stop = geneve_stop, | |
956 | .ndo_start_xmit = geneve_xmit, | |
957 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 958 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
959 | .ndo_validate_addr = eth_validate_addr, |
960 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 961 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
962 | }; |
963 | ||
964 | static void geneve_get_drvinfo(struct net_device *dev, | |
965 | struct ethtool_drvinfo *drvinfo) | |
966 | { | |
967 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
968 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
969 | } | |
970 | ||
971 | static const struct ethtool_ops geneve_ethtool_ops = { | |
972 | .get_drvinfo = geneve_get_drvinfo, | |
973 | .get_link = ethtool_op_get_link, | |
974 | }; | |
975 | ||
976 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
977 | static struct device_type geneve_type = { | |
978 | .name = "geneve", | |
979 | }; | |
980 | ||
e5de25dc | 981 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 982 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 983 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 984 | */ |
681e683f | 985 | static void geneve_push_rx_ports(struct net_device *dev) |
05ca4029 SA |
986 | { |
987 | struct net *net = dev_net(dev); | |
988 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
989 | struct geneve_sock *gs; | |
681e683f | 990 | |
05ca4029 | 991 | rcu_read_lock(); |
e7b3db5e AD |
992 | list_for_each_entry_rcu(gs, &gn->sock_list, list) |
993 | udp_tunnel_push_rx_port(dev, gs->sock, | |
994 | UDP_TUNNEL_TYPE_GENEVE); | |
05ca4029 SA |
995 | rcu_read_unlock(); |
996 | } | |
05ca4029 | 997 | |
2d07dc79 JL |
998 | /* Initialize the device structure. */ |
999 | static void geneve_setup(struct net_device *dev) | |
1000 | { | |
1001 | ether_setup(dev); | |
1002 | ||
1003 | dev->netdev_ops = &geneve_netdev_ops; | |
1004 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1005 | dev->destructor = free_netdev; | |
1006 | ||
1007 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1008 | ||
2d07dc79 JL |
1009 | dev->features |= NETIF_F_LLTX; |
1010 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1011 | dev->features |= NETIF_F_RXCSUM; | |
1012 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1013 | ||
2d07dc79 JL |
1014 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1015 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1016 | |
91572088 JW |
1017 | /* MTU range: 68 - (something less than 65535) */ |
1018 | dev->min_mtu = ETH_MIN_MTU; | |
1019 | /* The max_mtu calculation does not take account of GENEVE | |
1020 | * options, to avoid excluding potentially valid | |
1021 | * configurations. This will be further reduced by IPvX hdr size. | |
1022 | */ | |
1023 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1024 | ||
2d07dc79 | 1025 | netif_keep_dst(dev); |
fc41cdb3 | 1026 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1027 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1028 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1029 | } |
1030 | ||
1031 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1032 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1033 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1034 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1035 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1036 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1037 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1038 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1039 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1040 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1041 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1042 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1043 | }; |
1044 | ||
1045 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1046 | { | |
1047 | if (tb[IFLA_ADDRESS]) { | |
1048 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1049 | return -EINVAL; | |
1050 | ||
1051 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1052 | return -EADDRNOTAVAIL; | |
1053 | } | |
1054 | ||
1055 | if (!data) | |
1056 | return -EINVAL; | |
1057 | ||
1058 | if (data[IFLA_GENEVE_ID]) { | |
1059 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1060 | ||
1061 | if (vni >= GENEVE_VID_MASK) | |
1062 | return -ERANGE; | |
1063 | } | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
371bd106 | 1068 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1069 | const struct ip_tunnel_info *info, |
371bd106 PS |
1070 | bool *tun_on_same_port, |
1071 | bool *tun_collect_md) | |
1072 | { | |
9b4437a5 | 1073 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1074 | |
1075 | *tun_on_same_port = false; | |
1076 | *tun_collect_md = false; | |
371bd106 | 1077 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9b4437a5 | 1078 | if (info->key.tp_dst == geneve->info.key.tp_dst) { |
371bd106 PS |
1079 | *tun_collect_md = geneve->collect_md; |
1080 | *tun_on_same_port = true; | |
1081 | } | |
9b4437a5 | 1082 | if (info->key.tun_id == geneve->info.key.tun_id && |
1083 | info->key.tp_dst == geneve->info.key.tp_dst && | |
1084 | !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1085 | t = geneve; |
1086 | } | |
1087 | return t; | |
1088 | } | |
1089 | ||
9b4437a5 | 1090 | static bool is_all_zero(const u8 *fp, size_t size) |
1091 | { | |
1092 | int i; | |
1093 | ||
1094 | for (i = 0; i < size; i++) | |
1095 | if (fp[i]) | |
1096 | return false; | |
1097 | return true; | |
1098 | } | |
1099 | ||
1100 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) | |
1101 | { | |
1102 | if (info->key.tun_id || info->key.tun_flags || info->key.tos || | |
1103 | info->key.ttl || info->key.label || info->key.tp_src || | |
1104 | !is_all_zero((const u8 *)&info->key.u, sizeof(info->key.u))) | |
1105 | return false; | |
1106 | else | |
1107 | return true; | |
1108 | } | |
1109 | ||
e305ac6c | 1110 | static int geneve_configure(struct net *net, struct net_device *dev, |
9b4437a5 | 1111 | const struct ip_tunnel_info *info, |
1112 | bool metadata, bool ipv6_rx_csum) | |
2d07dc79 JL |
1113 | { |
1114 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1115 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1116 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1117 | int err, encap_len; |
2d07dc79 | 1118 | |
9b4437a5 | 1119 | if (metadata && !is_tnl_info_zero(info)) |
8ed66f0e | 1120 | return -EINVAL; |
2d07dc79 JL |
1121 | |
1122 | geneve->net = net; | |
1123 | geneve->dev = dev; | |
1124 | ||
9b4437a5 | 1125 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1126 | if (t) |
1127 | return -EBUSY; | |
1128 | ||
184fc8b5 PA |
1129 | /* make enough headroom for basic scenario */ |
1130 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9b4437a5 | 1131 | if (ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1132 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1133 | dev->max_mtu -= sizeof(struct iphdr); |
1134 | } else { | |
184fc8b5 | 1135 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1136 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1137 | } | |
184fc8b5 PA |
1138 | dev->needed_headroom = encap_len + ETH_HLEN; |
1139 | ||
371bd106 PS |
1140 | if (metadata) { |
1141 | if (tun_on_same_port) | |
1142 | return -EPERM; | |
1143 | } else { | |
1144 | if (tun_collect_md) | |
1145 | return -EPERM; | |
1146 | } | |
1147 | ||
9b4437a5 | 1148 | dst_cache_reset(&geneve->info.dst_cache); |
1149 | geneve->info = *info; | |
1150 | geneve->collect_md = metadata; | |
1151 | geneve->use_udp6_rx_checksums = ipv6_rx_csum; | |
468dfffc | 1152 | |
2d07dc79 JL |
1153 | err = register_netdevice(dev); |
1154 | if (err) | |
1155 | return err; | |
1156 | ||
e305ac6c | 1157 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1158 | return 0; |
1159 | } | |
1160 | ||
9b4437a5 | 1161 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1162 | { | |
1163 | memset(info, 0, sizeof(*info)); | |
1164 | info->key.tp_dst = htons(dst_port); | |
1165 | } | |
1166 | ||
e305ac6c PS |
1167 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1168 | struct nlattr *tb[], struct nlattr *data[]) | |
1169 | { | |
9b4437a5 | 1170 | bool use_udp6_rx_checksums = false; |
1171 | struct ip_tunnel_info info; | |
e305ac6c | 1172 | bool metadata = false; |
9b4437a5 | 1173 | |
1174 | init_tnl_info(&info, GENEVE_UDP_PORT); | |
e305ac6c | 1175 | |
8ed66f0e JL |
1176 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1177 | return -EINVAL; | |
1178 | ||
1179 | if (data[IFLA_GENEVE_REMOTE]) { | |
9b4437a5 | 1180 | info.key.u.ipv4.dst = |
8ed66f0e | 1181 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1182 | |
1183 | if (IN_MULTICAST(ntohl(info.key.u.ipv4.dst))) { | |
1184 | netdev_dbg(dev, "multicast remote is unsupported\n"); | |
1185 | return -EINVAL; | |
1186 | } | |
8ed66f0e JL |
1187 | } |
1188 | ||
1189 | if (data[IFLA_GENEVE_REMOTE6]) { | |
9b4437a5 | 1190 | #if IS_ENABLED(CONFIG_IPV6) |
1191 | info.mode = IP_TUNNEL_INFO_IPV6; | |
1192 | info.key.u.ipv6.dst = | |
8ed66f0e JL |
1193 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1194 | ||
9b4437a5 | 1195 | if (ipv6_addr_type(&info.key.u.ipv6.dst) & |
8ed66f0e JL |
1196 | IPV6_ADDR_LINKLOCAL) { |
1197 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1198 | return -EINVAL; | |
1199 | } | |
9b4437a5 | 1200 | if (ipv6_addr_is_multicast(&info.key.u.ipv6.dst)) { |
1201 | netdev_dbg(dev, "multicast remote is unsupported\n"); | |
1202 | return -EINVAL; | |
1203 | } | |
1204 | info.key.tun_flags |= TUNNEL_CSUM; | |
1205 | use_udp6_rx_checksums = true; | |
1206 | #else | |
1207 | return -EPFNOSUPPORT; | |
1208 | #endif | |
8ed66f0e JL |
1209 | } |
1210 | ||
9b4437a5 | 1211 | if (data[IFLA_GENEVE_ID]) { |
1212 | __u32 vni; | |
1213 | __u8 tvni[3]; | |
1214 | ||
e277de5f | 1215 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1216 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1217 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1218 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1219 | |
9b4437a5 | 1220 | info.key.tun_id = vni_to_tunnel_id(tvni); |
1221 | } | |
8760ce58 | 1222 | if (data[IFLA_GENEVE_TTL]) |
9b4437a5 | 1223 | info.key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1224 | |
d8951125 | 1225 | if (data[IFLA_GENEVE_TOS]) |
9b4437a5 | 1226 | info.key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1227 | |
9b4437a5 | 1228 | if (data[IFLA_GENEVE_LABEL]) { |
1229 | info.key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1230 | IPV6_FLOWLABEL_MASK; | |
1231 | if (info.key.label && (!(info.mode & IP_TUNNEL_INFO_IPV6))) | |
1232 | return -EINVAL; | |
1233 | } | |
8eb3b995 | 1234 | |
e305ac6c | 1235 | if (data[IFLA_GENEVE_PORT]) |
9b4437a5 | 1236 | info.key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1237 | |
e305ac6c PS |
1238 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1239 | metadata = true; | |
2d07dc79 | 1240 | |
abe492b4 | 1241 | if (data[IFLA_GENEVE_UDP_CSUM] && |
14f1f724 | 1242 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
9b4437a5 | 1243 | info.key.tun_flags |= TUNNEL_CSUM; |
abe492b4 TH |
1244 | |
1245 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1246 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
9b4437a5 | 1247 | info.key.tun_flags &= ~TUNNEL_CSUM; |
abe492b4 TH |
1248 | |
1249 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1250 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
9b4437a5 | 1251 | use_udp6_rx_checksums = false; |
abe492b4 | 1252 | |
9b4437a5 | 1253 | return geneve_configure(net, dev, &info, metadata, use_udp6_rx_checksums); |
2d07dc79 JL |
1254 | } |
1255 | ||
1256 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1257 | { | |
1258 | struct geneve_dev *geneve = netdev_priv(dev); | |
1259 | ||
2d07dc79 JL |
1260 | list_del(&geneve->next); |
1261 | unregister_netdevice_queue(dev, head); | |
1262 | } | |
1263 | ||
1264 | static size_t geneve_get_size(const struct net_device *dev) | |
1265 | { | |
1266 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1267 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1268 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1269 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
8eb3b995 | 1270 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1271 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1272 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1273 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1274 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1275 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1276 | 0; |
1277 | } | |
1278 | ||
1279 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1280 | { | |
1281 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 1282 | struct ip_tunnel_info *info = &geneve->info; |
1283 | __u8 tmp_vni[3]; | |
2d07dc79 JL |
1284 | __u32 vni; |
1285 | ||
9b4437a5 | 1286 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1287 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1288 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1289 | goto nla_put_failure; | |
1290 | ||
9b4437a5 | 1291 | if (ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1292 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1293 | info->key.u.ipv4.dst)) |
1294 | goto nla_put_failure; | |
1295 | ||
1296 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, | |
1297 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1298 | goto nla_put_failure; |
9b4437a5 | 1299 | |
8ed66f0e JL |
1300 | #if IS_ENABLED(CONFIG_IPV6) |
1301 | } else { | |
1302 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
9b4437a5 | 1303 | &info->key.u.ipv6.dst)) |
1304 | goto nla_put_failure; | |
1305 | ||
1306 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1307 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1308 | goto nla_put_failure; | |
1309 | ||
1310 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1311 | !geneve->use_udp6_rx_checksums)) | |
8ed66f0e JL |
1312 | goto nla_put_failure; |
1313 | #endif | |
1314 | } | |
2d07dc79 | 1315 | |
9b4437a5 | 1316 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1317 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1318 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1319 | goto nla_put_failure; |
1320 | ||
9b4437a5 | 1321 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1322 | goto nla_put_failure; |
1323 | ||
e305ac6c PS |
1324 | if (geneve->collect_md) { |
1325 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1326 | goto nla_put_failure; | |
1327 | } | |
2d07dc79 JL |
1328 | return 0; |
1329 | ||
1330 | nla_put_failure: | |
1331 | return -EMSGSIZE; | |
1332 | } | |
1333 | ||
1334 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1335 | .kind = "geneve", | |
1336 | .maxtype = IFLA_GENEVE_MAX, | |
1337 | .policy = geneve_policy, | |
1338 | .priv_size = sizeof(struct geneve_dev), | |
1339 | .setup = geneve_setup, | |
1340 | .validate = geneve_validate, | |
1341 | .newlink = geneve_newlink, | |
1342 | .dellink = geneve_dellink, | |
1343 | .get_size = geneve_get_size, | |
1344 | .fill_info = geneve_fill_info, | |
1345 | }; | |
1346 | ||
e305ac6c PS |
1347 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1348 | u8 name_assign_type, u16 dst_port) | |
1349 | { | |
1350 | struct nlattr *tb[IFLA_MAX + 1]; | |
9b4437a5 | 1351 | struct ip_tunnel_info info; |
e305ac6c | 1352 | struct net_device *dev; |
106da663 | 1353 | LIST_HEAD(list_kill); |
e305ac6c PS |
1354 | int err; |
1355 | ||
1356 | memset(tb, 0, sizeof(tb)); | |
1357 | dev = rtnl_create_link(net, name, name_assign_type, | |
1358 | &geneve_link_ops, tb); | |
1359 | if (IS_ERR(dev)) | |
1360 | return dev; | |
1361 | ||
9b4437a5 | 1362 | init_tnl_info(&info, dst_port); |
1363 | err = geneve_configure(net, dev, &info, true, true); | |
106da663 ND |
1364 | if (err) { |
1365 | free_netdev(dev); | |
1366 | return ERR_PTR(err); | |
1367 | } | |
7e059158 DW |
1368 | |
1369 | /* openvswitch users expect packet sizes to be unrestricted, | |
1370 | * so set the largest MTU we can. | |
1371 | */ | |
91572088 | 1372 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1373 | if (err) |
1374 | goto err; | |
1375 | ||
41009481 ND |
1376 | err = rtnl_configure_link(dev, NULL); |
1377 | if (err < 0) | |
1378 | goto err; | |
1379 | ||
e305ac6c | 1380 | return dev; |
9b4437a5 | 1381 | err: |
106da663 ND |
1382 | geneve_dellink(dev, &list_kill); |
1383 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1384 | return ERR_PTR(err); |
e305ac6c PS |
1385 | } |
1386 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1387 | ||
681e683f HFS |
1388 | static int geneve_netdevice_event(struct notifier_block *unused, |
1389 | unsigned long event, void *ptr) | |
1390 | { | |
1391 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1392 | ||
7c46a640 | 1393 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
681e683f HFS |
1394 | geneve_push_rx_ports(dev); |
1395 | ||
1396 | return NOTIFY_DONE; | |
1397 | } | |
1398 | ||
1399 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1400 | .notifier_call = geneve_netdevice_event, | |
1401 | }; | |
1402 | ||
2d07dc79 JL |
1403 | static __net_init int geneve_init_net(struct net *net) |
1404 | { | |
1405 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1406 | |
1407 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1408 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1409 | return 0; |
1410 | } | |
1411 | ||
1412 | static void __net_exit geneve_exit_net(struct net *net) | |
1413 | { | |
1414 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1415 | struct geneve_dev *geneve, *next; | |
1416 | struct net_device *dev, *aux; | |
1417 | LIST_HEAD(list); | |
1418 | ||
1419 | rtnl_lock(); | |
1420 | ||
1421 | /* gather any geneve devices that were moved into this ns */ | |
1422 | for_each_netdev_safe(net, dev, aux) | |
1423 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1424 | unregister_netdevice_queue(dev, &list); | |
1425 | ||
1426 | /* now gather any other geneve devices that were created in this ns */ | |
1427 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1428 | /* If geneve->dev is in the same netns, it was already added | |
1429 | * to the list by the previous loop. | |
1430 | */ | |
1431 | if (!net_eq(dev_net(geneve->dev), net)) | |
1432 | unregister_netdevice_queue(geneve->dev, &list); | |
1433 | } | |
1434 | ||
1435 | /* unregister the devices gathered above */ | |
1436 | unregister_netdevice_many(&list); | |
1437 | rtnl_unlock(); | |
1438 | } | |
1439 | ||
1440 | static struct pernet_operations geneve_net_ops = { | |
1441 | .init = geneve_init_net, | |
1442 | .exit = geneve_exit_net, | |
1443 | .id = &geneve_net_id, | |
1444 | .size = sizeof(struct geneve_net), | |
1445 | }; | |
1446 | ||
1447 | static int __init geneve_init_module(void) | |
1448 | { | |
1449 | int rc; | |
1450 | ||
1451 | rc = register_pernet_subsys(&geneve_net_ops); | |
1452 | if (rc) | |
1453 | goto out1; | |
1454 | ||
681e683f | 1455 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1456 | if (rc) |
1457 | goto out2; | |
1458 | ||
681e683f HFS |
1459 | rc = rtnl_link_register(&geneve_link_ops); |
1460 | if (rc) | |
1461 | goto out3; | |
1462 | ||
2d07dc79 | 1463 | return 0; |
681e683f HFS |
1464 | out3: |
1465 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1466 | out2: |
1467 | unregister_pernet_subsys(&geneve_net_ops); | |
1468 | out1: | |
1469 | return rc; | |
1470 | } | |
1471 | late_initcall(geneve_init_module); | |
1472 | ||
1473 | static void __exit geneve_cleanup_module(void) | |
1474 | { | |
1475 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1476 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1477 | unregister_pernet_subsys(&geneve_net_ops); |
1478 | } | |
1479 | module_exit(geneve_cleanup_module); | |
1480 | ||
1481 | MODULE_LICENSE("GPL"); | |
1482 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1483 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1484 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1485 | MODULE_ALIAS_RTNL_LINK("geneve"); |