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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 | ||
2e0b26e1 | 106 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
107 | { | |
108 | #ifdef __BIG_ENDIAN | |
109 | return (vni[0] == tun_id[2]) && | |
110 | (vni[1] == tun_id[1]) && | |
111 | (vni[2] == tun_id[0]); | |
112 | #else | |
113 | return !memcmp(vni, &tun_id[5], 3); | |
114 | #endif | |
115 | } | |
116 | ||
1e9f12ec JB |
117 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
118 | { | |
119 | return gs->sock->sk->sk_family; | |
120 | } | |
121 | ||
66d47003 | 122 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 123 | __be32 addr, u8 vni[]) |
2d07dc79 | 124 | { |
2d07dc79 | 125 | struct hlist_head *vni_list_head; |
e305ac6c | 126 | struct geneve_dev *geneve; |
2d07dc79 JL |
127 | __u32 hash; |
128 | ||
2d07dc79 | 129 | /* Find the device for this VNI */ |
371bd106 | 130 | hash = geneve_net_vni_hash(vni); |
66d47003 | 131 | vni_list_head = &gs->vni_list[hash]; |
e305ac6c | 132 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
2e0b26e1 | 133 | if (eq_tun_id_and_vni((u8 *)&geneve->info.key.tun_id, vni) && |
9b4437a5 | 134 | addr == geneve->info.key.u.ipv4.dst) |
8ed66f0e JL |
135 | return geneve; |
136 | } | |
137 | return NULL; | |
138 | } | |
139 | ||
140 | #if IS_ENABLED(CONFIG_IPV6) | |
141 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
142 | struct in6_addr addr6, u8 vni[]) | |
143 | { | |
144 | struct hlist_head *vni_list_head; | |
145 | struct geneve_dev *geneve; | |
146 | __u32 hash; | |
147 | ||
148 | /* Find the device for this VNI */ | |
149 | hash = geneve_net_vni_hash(vni); | |
150 | vni_list_head = &gs->vni_list[hash]; | |
151 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
2e0b26e1 | 152 | if (eq_tun_id_and_vni((u8 *)&geneve->info.key.tun_id, vni) && |
9b4437a5 | 153 | ipv6_addr_equal(&addr6, &geneve->info.key.u.ipv6.dst)) |
e305ac6c | 154 | return geneve; |
2d07dc79 | 155 | } |
e305ac6c PS |
156 | return NULL; |
157 | } | |
8ed66f0e | 158 | #endif |
e305ac6c | 159 | |
371bd106 PS |
160 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
161 | { | |
162 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
163 | } | |
164 | ||
9fc47545 JB |
165 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
166 | struct sk_buff *skb) | |
e305ac6c | 167 | { |
8ed66f0e | 168 | static u8 zero_vni[3]; |
9b4437a5 | 169 | u8 *vni; |
e305ac6c | 170 | |
1e9f12ec | 171 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 172 | struct iphdr *iph; |
9b4437a5 | 173 | __be32 addr; |
9fc47545 | 174 | |
8ed66f0e | 175 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 176 | |
8ed66f0e JL |
177 | if (gs->collect_md) { |
178 | vni = zero_vni; | |
179 | addr = 0; | |
180 | } else { | |
9fc47545 | 181 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
182 | addr = iph->saddr; |
183 | } | |
184 | ||
9fc47545 | 185 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 186 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 187 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 188 | static struct in6_addr zero_addr6; |
9fc47545 JB |
189 | struct ipv6hdr *ip6h; |
190 | struct in6_addr addr6; | |
191 | ||
8ed66f0e | 192 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 193 | |
8ed66f0e JL |
194 | if (gs->collect_md) { |
195 | vni = zero_vni; | |
196 | addr6 = zero_addr6; | |
197 | } else { | |
9fc47545 | 198 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
199 | addr6 = ip6h->saddr; |
200 | } | |
201 | ||
9fc47545 | 202 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
203 | #endif |
204 | } | |
9fc47545 JB |
205 | return NULL; |
206 | } | |
207 | ||
208 | /* geneve receive/decap routine */ | |
209 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
210 | struct sk_buff *skb) | |
211 | { | |
212 | struct genevehdr *gnvh = geneve_hdr(skb); | |
213 | struct metadata_dst *tun_dst = NULL; | |
214 | struct pcpu_sw_netstats *stats; | |
215 | int err = 0; | |
216 | void *oiph; | |
2d07dc79 | 217 | |
371bd106 | 218 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 219 | __be16 flags; |
e305ac6c PS |
220 | |
221 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
222 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
223 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
224 | ||
1e9f12ec | 225 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
226 | vni_to_tunnel_id(gnvh->vni), |
227 | gnvh->opt_len * 4); | |
228 | if (!tun_dst) | |
229 | goto drop; | |
e305ac6c | 230 | /* Update tunnel dst according to Geneve options. */ |
4c222798 PS |
231 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
232 | gnvh->options, gnvh->opt_len * 4); | |
e305ac6c PS |
233 | } else { |
234 | /* Drop packets w/ critical options, | |
235 | * since we don't support any... | |
236 | */ | |
237 | if (gnvh->critical) | |
238 | goto drop; | |
239 | } | |
2d07dc79 JL |
240 | |
241 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
242 | skb->protocol = eth_type_trans(skb, geneve->dev); |
243 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
244 | ||
e305ac6c PS |
245 | if (tun_dst) |
246 | skb_dst_set(skb, &tun_dst->dst); | |
247 | ||
2d07dc79 JL |
248 | /* Ignore packet loops (and multicast echo) */ |
249 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
250 | goto drop; | |
251 | ||
9fc47545 | 252 | oiph = skb_network_header(skb); |
2d07dc79 JL |
253 | skb_reset_network_header(skb); |
254 | ||
9fc47545 JB |
255 | if (geneve_get_sk_family(gs) == AF_INET) |
256 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 257 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
258 | else |
259 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 260 | #endif |
2d07dc79 JL |
261 | |
262 | if (unlikely(err)) { | |
8ed66f0e | 263 | if (log_ecn_error) { |
9fc47545 | 264 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
265 | net_info_ratelimited("non-ECT from %pI4 " |
266 | "with TOS=%#x\n", | |
9fc47545 JB |
267 | &((struct iphdr *)oiph)->saddr, |
268 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 269 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 270 | else |
8ed66f0e | 271 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 272 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
273 | #endif |
274 | } | |
2d07dc79 JL |
275 | if (err > 1) { |
276 | ++geneve->dev->stats.rx_frame_errors; | |
277 | ++geneve->dev->stats.rx_errors; | |
278 | goto drop; | |
279 | } | |
280 | } | |
281 | ||
282 | stats = this_cpu_ptr(geneve->dev->tstats); | |
283 | u64_stats_update_begin(&stats->syncp); | |
284 | stats->rx_packets++; | |
285 | stats->rx_bytes += skb->len; | |
286 | u64_stats_update_end(&stats->syncp); | |
287 | ||
8e816df8 | 288 | gro_cells_receive(&geneve->gro_cells, skb); |
2d07dc79 JL |
289 | return; |
290 | drop: | |
291 | /* Consume bad packet */ | |
292 | kfree_skb(skb); | |
293 | } | |
294 | ||
295 | /* Setup stats when device is created */ | |
296 | static int geneve_init(struct net_device *dev) | |
297 | { | |
8e816df8 JG |
298 | struct geneve_dev *geneve = netdev_priv(dev); |
299 | int err; | |
300 | ||
2d07dc79 JL |
301 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
302 | if (!dev->tstats) | |
303 | return -ENOMEM; | |
8e816df8 JG |
304 | |
305 | err = gro_cells_init(&geneve->gro_cells, dev); | |
306 | if (err) { | |
307 | free_percpu(dev->tstats); | |
308 | return err; | |
309 | } | |
310 | ||
9b4437a5 | 311 | err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL); |
468dfffc PA |
312 | if (err) { |
313 | free_percpu(dev->tstats); | |
314 | gro_cells_destroy(&geneve->gro_cells); | |
315 | return err; | |
316 | } | |
2d07dc79 JL |
317 | return 0; |
318 | } | |
319 | ||
320 | static void geneve_uninit(struct net_device *dev) | |
321 | { | |
8e816df8 JG |
322 | struct geneve_dev *geneve = netdev_priv(dev); |
323 | ||
9b4437a5 | 324 | dst_cache_destroy(&geneve->info.dst_cache); |
8e816df8 | 325 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
326 | free_percpu(dev->tstats); |
327 | } | |
328 | ||
371bd106 PS |
329 | /* Callback from net/ipv4/udp.c to receive packets */ |
330 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
331 | { | |
332 | struct genevehdr *geneveh; | |
9fc47545 | 333 | struct geneve_dev *geneve; |
371bd106 PS |
334 | struct geneve_sock *gs; |
335 | int opts_len; | |
336 | ||
337 | /* Need Geneve and inner Ethernet header to be present */ | |
338 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
e5aed006 | 339 | goto drop; |
371bd106 PS |
340 | |
341 | /* Return packets with reserved bits set */ | |
342 | geneveh = geneve_hdr(skb); | |
343 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 344 | goto drop; |
371bd106 PS |
345 | |
346 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 347 | goto drop; |
371bd106 | 348 | |
9fc47545 JB |
349 | gs = rcu_dereference_sk_user_data(sk); |
350 | if (!gs) | |
351 | goto drop; | |
352 | ||
353 | geneve = geneve_lookup_skb(gs, skb); | |
354 | if (!geneve) | |
355 | goto drop; | |
356 | ||
371bd106 PS |
357 | opts_len = geneveh->opt_len * 4; |
358 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 JB |
359 | htons(ETH_P_TEB), |
360 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
371bd106 PS |
361 | goto drop; |
362 | ||
9fc47545 | 363 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
364 | return 0; |
365 | ||
366 | drop: | |
367 | /* Consume bad packet */ | |
368 | kfree_skb(skb); | |
369 | return 0; | |
371bd106 PS |
370 | } |
371 | ||
372 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
9b4437a5 | 373 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
374 | { |
375 | struct socket *sock; | |
376 | struct udp_port_cfg udp_conf; | |
377 | int err; | |
378 | ||
379 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
380 | ||
381 | if (ipv6) { | |
382 | udp_conf.family = AF_INET6; | |
8ed66f0e | 383 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 384 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
385 | } else { |
386 | udp_conf.family = AF_INET; | |
387 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
388 | } | |
389 | ||
390 | udp_conf.local_udp_port = port; | |
391 | ||
392 | /* Open UDP socket */ | |
393 | err = udp_sock_create(net, &udp_conf, &sock); | |
394 | if (err < 0) | |
395 | return ERR_PTR(err); | |
396 | ||
397 | return sock; | |
398 | } | |
399 | ||
371bd106 PS |
400 | static int geneve_hlen(struct genevehdr *gh) |
401 | { | |
402 | return sizeof(*gh) + gh->opt_len * 4; | |
403 | } | |
404 | ||
4a0090a9 TH |
405 | static struct sk_buff **geneve_gro_receive(struct sock *sk, |
406 | struct sk_buff **head, | |
407 | struct sk_buff *skb) | |
371bd106 PS |
408 | { |
409 | struct sk_buff *p, **pp = NULL; | |
410 | struct genevehdr *gh, *gh2; | |
411 | unsigned int hlen, gh_len, off_gnv; | |
412 | const struct packet_offload *ptype; | |
413 | __be16 type; | |
414 | int flush = 1; | |
415 | ||
416 | off_gnv = skb_gro_offset(skb); | |
417 | hlen = off_gnv + sizeof(*gh); | |
418 | gh = skb_gro_header_fast(skb, off_gnv); | |
419 | if (skb_gro_header_hard(skb, hlen)) { | |
420 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
421 | if (unlikely(!gh)) | |
422 | goto out; | |
423 | } | |
424 | ||
425 | if (gh->ver != GENEVE_VER || gh->oam) | |
426 | goto out; | |
427 | gh_len = geneve_hlen(gh); | |
428 | ||
429 | hlen = off_gnv + gh_len; | |
430 | if (skb_gro_header_hard(skb, hlen)) { | |
431 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
432 | if (unlikely(!gh)) | |
433 | goto out; | |
434 | } | |
435 | ||
371bd106 PS |
436 | for (p = *head; p; p = p->next) { |
437 | if (!NAPI_GRO_CB(p)->same_flow) | |
438 | continue; | |
439 | ||
440 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
441 | if (gh->opt_len != gh2->opt_len || | |
442 | memcmp(gh, gh2, gh_len)) { | |
443 | NAPI_GRO_CB(p)->same_flow = 0; | |
444 | continue; | |
445 | } | |
446 | } | |
447 | ||
448 | type = gh->proto_type; | |
449 | ||
450 | rcu_read_lock(); | |
451 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 452 | if (!ptype) |
371bd106 | 453 | goto out_unlock; |
371bd106 PS |
454 | |
455 | skb_gro_pull(skb, gh_len); | |
456 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 457 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 458 | flush = 0; |
371bd106 PS |
459 | |
460 | out_unlock: | |
461 | rcu_read_unlock(); | |
462 | out: | |
463 | NAPI_GRO_CB(skb)->flush |= flush; | |
464 | ||
465 | return pp; | |
466 | } | |
467 | ||
4a0090a9 TH |
468 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
469 | int nhoff) | |
371bd106 PS |
470 | { |
471 | struct genevehdr *gh; | |
472 | struct packet_offload *ptype; | |
473 | __be16 type; | |
474 | int gh_len; | |
475 | int err = -ENOSYS; | |
476 | ||
371bd106 PS |
477 | gh = (struct genevehdr *)(skb->data + nhoff); |
478 | gh_len = geneve_hlen(gh); | |
479 | type = gh->proto_type; | |
480 | ||
481 | rcu_read_lock(); | |
482 | ptype = gro_find_complete_by_type(type); | |
483 | if (ptype) | |
484 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
485 | ||
486 | rcu_read_unlock(); | |
229740c6 JR |
487 | |
488 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
489 | ||
371bd106 PS |
490 | return err; |
491 | } | |
492 | ||
493 | /* Create new listen socket if needed */ | |
494 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 495 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
496 | { |
497 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
498 | struct geneve_sock *gs; | |
499 | struct socket *sock; | |
500 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 501 | int h; |
371bd106 PS |
502 | |
503 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
504 | if (!gs) | |
505 | return ERR_PTR(-ENOMEM); | |
506 | ||
9b4437a5 | 507 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
508 | if (IS_ERR(sock)) { |
509 | kfree(gs); | |
510 | return ERR_CAST(sock); | |
511 | } | |
512 | ||
513 | gs->sock = sock; | |
514 | gs->refcnt = 1; | |
66d47003 PS |
515 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
516 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
517 | |
518 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 519 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
520 | |
521 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 522 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
523 | tunnel_cfg.sk_user_data = gs; |
524 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
525 | tunnel_cfg.gro_receive = geneve_gro_receive; |
526 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 PS |
527 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
528 | tunnel_cfg.encap_destroy = NULL; | |
529 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
530 | list_add(&gs->list, &gn->sock_list); |
531 | return gs; | |
532 | } | |
533 | ||
8ed66f0e | 534 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 535 | { |
8ed66f0e | 536 | if (!gs || --gs->refcnt) |
371bd106 PS |
537 | return; |
538 | ||
539 | list_del(&gs->list); | |
e7b3db5e | 540 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
541 | udp_tunnel_sock_release(gs->sock); |
542 | kfree_rcu(gs, rcu); | |
543 | } | |
544 | ||
8ed66f0e JL |
545 | static void geneve_sock_release(struct geneve_dev *geneve) |
546 | { | |
fceb9c3e | 547 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 548 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 549 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
550 | ||
551 | rcu_assign_pointer(geneve->sock6, NULL); | |
552 | #endif | |
553 | ||
554 | rcu_assign_pointer(geneve->sock4, NULL); | |
555 | synchronize_net(); | |
556 | ||
557 | __geneve_sock_release(gs4); | |
558 | #if IS_ENABLED(CONFIG_IPV6) | |
559 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
560 | #endif |
561 | } | |
562 | ||
371bd106 | 563 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 564 | sa_family_t family, |
371bd106 PS |
565 | __be16 dst_port) |
566 | { | |
567 | struct geneve_sock *gs; | |
568 | ||
569 | list_for_each_entry(gs, &gn->sock_list, list) { | |
570 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 571 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
572 | return gs; |
573 | } | |
574 | } | |
575 | return NULL; | |
576 | } | |
577 | ||
8ed66f0e | 578 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 579 | { |
2d07dc79 | 580 | struct net *net = geneve->net; |
371bd106 | 581 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
2d07dc79 | 582 | struct geneve_sock *gs; |
9b4437a5 | 583 | __u8 vni[3]; |
66d47003 | 584 | __u32 hash; |
2d07dc79 | 585 | |
9b4437a5 | 586 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst); |
371bd106 PS |
587 | if (gs) { |
588 | gs->refcnt++; | |
589 | goto out; | |
590 | } | |
591 | ||
9b4437a5 | 592 | gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6, |
593 | geneve->use_udp6_rx_checksums); | |
2d07dc79 JL |
594 | if (IS_ERR(gs)) |
595 | return PTR_ERR(gs); | |
596 | ||
371bd106 PS |
597 | out: |
598 | gs->collect_md = geneve->collect_md; | |
8ed66f0e JL |
599 | #if IS_ENABLED(CONFIG_IPV6) |
600 | if (ipv6) | |
fceb9c3e | 601 | rcu_assign_pointer(geneve->sock6, gs); |
8ed66f0e JL |
602 | else |
603 | #endif | |
fceb9c3e | 604 | rcu_assign_pointer(geneve->sock4, gs); |
66d47003 | 605 | |
9b4437a5 | 606 | tunnel_id_to_vni(geneve->info.key.tun_id, vni); |
607 | hash = geneve_net_vni_hash(vni); | |
66d47003 | 608 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
609 | return 0; |
610 | } | |
611 | ||
8ed66f0e JL |
612 | static int geneve_open(struct net_device *dev) |
613 | { | |
614 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 615 | bool ipv6 = !!(geneve->info.mode & IP_TUNNEL_INFO_IPV6); |
8ed66f0e JL |
616 | bool metadata = geneve->collect_md; |
617 | int ret = 0; | |
618 | ||
8ed66f0e | 619 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
620 | if (ipv6 || metadata) |
621 | ret = geneve_sock_add(geneve, true); | |
622 | #endif | |
623 | if (!ret && (!ipv6 || metadata)) | |
624 | ret = geneve_sock_add(geneve, false); | |
625 | if (ret < 0) | |
626 | geneve_sock_release(geneve); | |
627 | ||
628 | return ret; | |
629 | } | |
630 | ||
2d07dc79 JL |
631 | static int geneve_stop(struct net_device *dev) |
632 | { | |
633 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 634 | |
66d47003 PS |
635 | if (!hlist_unhashed(&geneve->hlist)) |
636 | hlist_del_rcu(&geneve->hlist); | |
8ed66f0e | 637 | geneve_sock_release(geneve); |
371bd106 PS |
638 | return 0; |
639 | } | |
640 | ||
8ed66f0e | 641 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 642 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
643 | { |
644 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 645 | geneveh->opt_len = info->options_len / 4; |
646 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
647 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 648 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 649 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
650 | geneveh->proto_type = htons(ETH_P_TEB); |
651 | geneveh->rsvd2 = 0; | |
652 | ||
c3ef5aa5 | 653 | ip_tunnel_info_opts_get(geneveh->options, info); |
8ed66f0e JL |
654 | } |
655 | ||
c3ef5aa5 | 656 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
657 | const struct ip_tunnel_info *info, | |
658 | bool xnet, int ip_hdr_len) | |
371bd106 | 659 | { |
c3ef5aa5 | 660 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
661 | struct genevehdr *gnvh; |
662 | int min_headroom; | |
663 | int err; | |
664 | ||
c3ef5aa5 | 665 | skb_reset_mac_header(skb); |
8ed66f0e JL |
666 | skb_scrub_packet(skb, xnet); |
667 | ||
c3ef5aa5 | 668 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
669 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 670 | err = skb_cow_head(skb, min_headroom); |
aed069df | 671 | if (unlikely(err)) |
8ed66f0e | 672 | goto free_dst; |
8ed66f0e | 673 | |
aed069df | 674 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 675 | if (err) |
8ed66f0e | 676 | goto free_dst; |
8ed66f0e | 677 | |
c3ef5aa5 | 678 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + |
679 | info->options_len); | |
680 | geneve_build_header(gnvh, info); | |
8ed66f0e JL |
681 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
682 | return 0; | |
683 | ||
684 | free_dst: | |
685 | dst_release(dst); | |
686 | return err; | |
687 | } | |
8ed66f0e JL |
688 | |
689 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
690 | struct net_device *dev, | |
691 | struct flowi4 *fl4, | |
c3ef5aa5 | 692 | const struct ip_tunnel_info *info) |
e305ac6c | 693 | { |
db3c6139 | 694 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 695 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 696 | struct dst_cache *dst_cache; |
e305ac6c PS |
697 | struct rtable *rt = NULL; |
698 | __u8 tos; | |
699 | ||
fceb9c3e | 700 | if (!rcu_dereference(geneve->sock4)) |
701 | return ERR_PTR(-EIO); | |
702 | ||
e305ac6c PS |
703 | memset(fl4, 0, sizeof(*fl4)); |
704 | fl4->flowi4_mark = skb->mark; | |
705 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 706 | fl4->daddr = info->key.u.ipv4.dst; |
707 | fl4->saddr = info->key.u.ipv4.src; | |
e305ac6c | 708 | |
9b4437a5 | 709 | tos = info->key.tos; |
710 | if ((tos == 1) && !geneve->collect_md) { | |
711 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
712 | use_cache = false; | |
468dfffc | 713 | } |
9b4437a5 | 714 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 715 | |
c3ef5aa5 | 716 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
717 | if (use_cache) { |
718 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
719 | if (rt) | |
720 | return rt; | |
e305ac6c | 721 | } |
e305ac6c PS |
722 | rt = ip_route_output_key(geneve->net, fl4); |
723 | if (IS_ERR(rt)) { | |
724 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 725 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
726 | } |
727 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
728 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 729 | ip_rt_put(rt); |
fc4099f1 | 730 | return ERR_PTR(-ELOOP); |
e305ac6c | 731 | } |
468dfffc PA |
732 | if (use_cache) |
733 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
734 | return rt; |
735 | } | |
736 | ||
8ed66f0e JL |
737 | #if IS_ENABLED(CONFIG_IPV6) |
738 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
739 | struct net_device *dev, | |
740 | struct flowi6 *fl6, | |
c3ef5aa5 | 741 | const struct ip_tunnel_info *info) |
8ed66f0e | 742 | { |
db3c6139 | 743 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 744 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 745 | struct dst_entry *dst = NULL; |
468dfffc | 746 | struct dst_cache *dst_cache; |
fceb9c3e | 747 | struct geneve_sock *gs6; |
3a56f86f | 748 | __u8 prio; |
8ed66f0e | 749 | |
fceb9c3e | 750 | gs6 = rcu_dereference(geneve->sock6); |
751 | if (!gs6) | |
752 | return ERR_PTR(-EIO); | |
753 | ||
8ed66f0e JL |
754 | memset(fl6, 0, sizeof(*fl6)); |
755 | fl6->flowi6_mark = skb->mark; | |
756 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 757 | fl6->daddr = info->key.u.ipv6.dst; |
758 | fl6->saddr = info->key.u.ipv6.src; | |
759 | prio = info->key.tos; | |
760 | if ((prio == 1) && !geneve->collect_md) { | |
761 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
762 | use_cache = false; | |
468dfffc PA |
763 | } |
764 | ||
9b4437a5 | 765 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
766 | info->key.label); | |
c3ef5aa5 | 767 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
768 | if (use_cache) { |
769 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
770 | if (dst) | |
771 | return dst; | |
8ed66f0e | 772 | } |
8ed66f0e JL |
773 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { |
774 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
775 | return ERR_PTR(-ENETUNREACH); | |
776 | } | |
777 | if (dst->dev == dev) { /* is this necessary? */ | |
778 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
779 | dst_release(dst); | |
780 | return ERR_PTR(-ELOOP); | |
781 | } | |
782 | ||
468dfffc PA |
783 | if (use_cache) |
784 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
785 | return dst; |
786 | } | |
787 | #endif | |
788 | ||
9b4437a5 | 789 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 790 | struct geneve_dev *geneve, |
791 | const struct ip_tunnel_info *info) | |
2d07dc79 | 792 | { |
9b4437a5 | 793 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
794 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
795 | const struct ip_tunnel_key *key = &info->key; | |
796 | struct rtable *rt; | |
2d07dc79 | 797 | struct flowi4 fl4; |
8760ce58 | 798 | __u8 tos, ttl; |
e305ac6c | 799 | __be16 sport; |
371bd106 | 800 | __be16 df; |
bcceeec3 | 801 | int err; |
980c394c | 802 | |
8ed66f0e | 803 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
9b4437a5 | 804 | if (IS_ERR(rt)) |
805 | return PTR_ERR(rt); | |
371bd106 PS |
806 | |
807 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
9b4437a5 | 808 | if (geneve->collect_md) { |
809 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
371bd106 | 810 | ttl = key->ttl; |
e305ac6c | 811 | } else { |
9b4437a5 | 812 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
813 | ttl = key->ttl ? : ip4_dst_hoplimit(&rt->dst); | |
2d07dc79 | 814 | } |
9b4437a5 | 815 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; |
2d07dc79 | 816 | |
c3ef5aa5 | 817 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 818 | if (unlikely(err)) |
819 | return err; | |
efeb2267 | 820 | |
9b4437a5 | 821 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
822 | tos, ttl, df, sport, geneve->info.key.tp_dst, | |
823 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
824 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
825 | return 0; | |
2d07dc79 JL |
826 | } |
827 | ||
8ed66f0e | 828 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 829 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 830 | struct geneve_dev *geneve, |
831 | const struct ip_tunnel_info *info) | |
8ed66f0e | 832 | { |
9b4437a5 | 833 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
834 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
835 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 836 | struct dst_entry *dst = NULL; |
8ed66f0e | 837 | struct flowi6 fl6; |
3a56f86f | 838 | __u8 prio, ttl; |
8ed66f0e | 839 | __be16 sport; |
bcceeec3 | 840 | int err; |
8ed66f0e JL |
841 | |
842 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
9b4437a5 | 843 | if (IS_ERR(dst)) |
844 | return PTR_ERR(dst); | |
8ed66f0e JL |
845 | |
846 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
9b4437a5 | 847 | if (geneve->collect_md) { |
848 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
849 | ttl = key->ttl; | |
850 | } else { | |
851 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
852 | ip_hdr(skb), skb); | |
853 | ttl = key->ttl ? : ip6_dst_hoplimit(dst); | |
854 | } | |
31ac1c19 | 855 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 856 | if (unlikely(err)) |
857 | return err; | |
8ed66f0e | 858 | |
9b4437a5 | 859 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
860 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
861 | info->key.label, sport, geneve->info.key.tp_dst, | |
862 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
863 | return 0; | |
864 | } | |
865 | #endif | |
8ed66f0e | 866 | |
9b4437a5 | 867 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
868 | { | |
869 | struct geneve_dev *geneve = netdev_priv(dev); | |
870 | struct ip_tunnel_info *info = NULL; | |
871 | int err; | |
abe492b4 | 872 | |
9b4437a5 | 873 | if (geneve->collect_md) { |
874 | info = skb_tunnel_info(skb); | |
875 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
876 | err = -EINVAL; | |
877 | netdev_dbg(dev, "no tunnel metadata\n"); | |
aed069df | 878 | goto tx_error; |
9b4437a5 | 879 | } |
8ed66f0e | 880 | } else { |
9b4437a5 | 881 | info = &geneve->info; |
8ed66f0e | 882 | } |
8eb3b995 | 883 | |
9b4437a5 | 884 | #if IS_ENABLED(CONFIG_IPV6) |
885 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
886 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
887 | else | |
888 | #endif | |
889 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
8ed66f0e | 890 | |
9b4437a5 | 891 | if (likely(!err)) |
892 | return NETDEV_TX_OK; | |
8ed66f0e JL |
893 | tx_error: |
894 | dev_kfree_skb(skb); | |
aed069df | 895 | |
8ed66f0e JL |
896 | if (err == -ELOOP) |
897 | dev->stats.collisions++; | |
898 | else if (err == -ENETUNREACH) | |
899 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
900 | |
901 | dev->stats.tx_errors++; | |
8ed66f0e JL |
902 | return NETDEV_TX_OK; |
903 | } | |
8ed66f0e | 904 | |
91572088 | 905 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 906 | { |
91572088 JW |
907 | /* Only possible if called internally, ndo_change_mtu path's new_mtu |
908 | * is guaranteed to be between dev->min_mtu and dev->max_mtu. | |
55e5bfb5 | 909 | */ |
91572088 JW |
910 | if (new_mtu > dev->max_mtu) |
911 | new_mtu = dev->max_mtu; | |
aeee0e66 | 912 | |
55e5bfb5 DW |
913 | dev->mtu = new_mtu; |
914 | return 0; | |
915 | } | |
916 | ||
fc4099f1 PS |
917 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
918 | { | |
919 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
920 | struct geneve_dev *geneve = netdev_priv(dev); | |
fc4099f1 | 921 | |
b8812fa8 | 922 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 923 | struct rtable *rt; |
924 | struct flowi4 fl4; | |
925 | ||
b8812fa8 JL |
926 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
927 | if (IS_ERR(rt)) | |
928 | return PTR_ERR(rt); | |
fc4099f1 | 929 | |
b8812fa8 JL |
930 | ip_rt_put(rt); |
931 | info->key.u.ipv4.src = fl4.saddr; | |
932 | #if IS_ENABLED(CONFIG_IPV6) | |
933 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 934 | struct dst_entry *dst; |
935 | struct flowi6 fl6; | |
936 | ||
b8812fa8 JL |
937 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); |
938 | if (IS_ERR(dst)) | |
939 | return PTR_ERR(dst); | |
940 | ||
941 | dst_release(dst); | |
942 | info->key.u.ipv6.src = fl6.saddr; | |
943 | #endif | |
944 | } else { | |
945 | return -EINVAL; | |
946 | } | |
fc4099f1 | 947 | |
fc4099f1 PS |
948 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
949 | 1, USHRT_MAX, true); | |
9b4437a5 | 950 | info->key.tp_dst = geneve->info.key.tp_dst; |
fc4099f1 PS |
951 | return 0; |
952 | } | |
953 | ||
2d07dc79 JL |
954 | static const struct net_device_ops geneve_netdev_ops = { |
955 | .ndo_init = geneve_init, | |
956 | .ndo_uninit = geneve_uninit, | |
957 | .ndo_open = geneve_open, | |
958 | .ndo_stop = geneve_stop, | |
959 | .ndo_start_xmit = geneve_xmit, | |
960 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 961 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
962 | .ndo_validate_addr = eth_validate_addr, |
963 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 964 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
965 | }; |
966 | ||
967 | static void geneve_get_drvinfo(struct net_device *dev, | |
968 | struct ethtool_drvinfo *drvinfo) | |
969 | { | |
970 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
971 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
972 | } | |
973 | ||
974 | static const struct ethtool_ops geneve_ethtool_ops = { | |
975 | .get_drvinfo = geneve_get_drvinfo, | |
976 | .get_link = ethtool_op_get_link, | |
977 | }; | |
978 | ||
979 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
980 | static struct device_type geneve_type = { | |
981 | .name = "geneve", | |
982 | }; | |
983 | ||
e5de25dc | 984 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 985 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 986 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 987 | */ |
681e683f | 988 | static void geneve_push_rx_ports(struct net_device *dev) |
05ca4029 SA |
989 | { |
990 | struct net *net = dev_net(dev); | |
991 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
992 | struct geneve_sock *gs; | |
681e683f | 993 | |
05ca4029 | 994 | rcu_read_lock(); |
e7b3db5e AD |
995 | list_for_each_entry_rcu(gs, &gn->sock_list, list) |
996 | udp_tunnel_push_rx_port(dev, gs->sock, | |
997 | UDP_TUNNEL_TYPE_GENEVE); | |
05ca4029 SA |
998 | rcu_read_unlock(); |
999 | } | |
05ca4029 | 1000 | |
2d07dc79 JL |
1001 | /* Initialize the device structure. */ |
1002 | static void geneve_setup(struct net_device *dev) | |
1003 | { | |
1004 | ether_setup(dev); | |
1005 | ||
1006 | dev->netdev_ops = &geneve_netdev_ops; | |
1007 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1008 | dev->destructor = free_netdev; | |
1009 | ||
1010 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1011 | ||
2d07dc79 JL |
1012 | dev->features |= NETIF_F_LLTX; |
1013 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1014 | dev->features |= NETIF_F_RXCSUM; | |
1015 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1016 | ||
2d07dc79 JL |
1017 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1018 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1019 | |
91572088 JW |
1020 | /* MTU range: 68 - (something less than 65535) */ |
1021 | dev->min_mtu = ETH_MIN_MTU; | |
1022 | /* The max_mtu calculation does not take account of GENEVE | |
1023 | * options, to avoid excluding potentially valid | |
1024 | * configurations. This will be further reduced by IPvX hdr size. | |
1025 | */ | |
1026 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1027 | ||
2d07dc79 | 1028 | netif_keep_dst(dev); |
fc41cdb3 | 1029 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1030 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1031 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1032 | } |
1033 | ||
1034 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1035 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1036 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1037 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1038 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1039 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1040 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1041 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1042 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1043 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1044 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1045 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
2d07dc79 JL |
1046 | }; |
1047 | ||
1048 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1049 | { | |
1050 | if (tb[IFLA_ADDRESS]) { | |
1051 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1052 | return -EINVAL; | |
1053 | ||
1054 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1055 | return -EADDRNOTAVAIL; | |
1056 | } | |
1057 | ||
1058 | if (!data) | |
1059 | return -EINVAL; | |
1060 | ||
1061 | if (data[IFLA_GENEVE_ID]) { | |
1062 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1063 | ||
1064 | if (vni >= GENEVE_VID_MASK) | |
1065 | return -ERANGE; | |
1066 | } | |
1067 | ||
1068 | return 0; | |
1069 | } | |
1070 | ||
371bd106 | 1071 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1072 | const struct ip_tunnel_info *info, |
371bd106 PS |
1073 | bool *tun_on_same_port, |
1074 | bool *tun_collect_md) | |
1075 | { | |
9b4437a5 | 1076 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1077 | |
1078 | *tun_on_same_port = false; | |
1079 | *tun_collect_md = false; | |
371bd106 | 1080 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9b4437a5 | 1081 | if (info->key.tp_dst == geneve->info.key.tp_dst) { |
371bd106 PS |
1082 | *tun_collect_md = geneve->collect_md; |
1083 | *tun_on_same_port = true; | |
1084 | } | |
9b4437a5 | 1085 | if (info->key.tun_id == geneve->info.key.tun_id && |
1086 | info->key.tp_dst == geneve->info.key.tp_dst && | |
1087 | !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1088 | t = geneve; |
1089 | } | |
1090 | return t; | |
1091 | } | |
1092 | ||
9b4437a5 | 1093 | static bool is_all_zero(const u8 *fp, size_t size) |
1094 | { | |
1095 | int i; | |
1096 | ||
1097 | for (i = 0; i < size; i++) | |
1098 | if (fp[i]) | |
1099 | return false; | |
1100 | return true; | |
1101 | } | |
1102 | ||
1103 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) | |
1104 | { | |
1105 | if (info->key.tun_id || info->key.tun_flags || info->key.tos || | |
1106 | info->key.ttl || info->key.label || info->key.tp_src || | |
1107 | !is_all_zero((const u8 *)&info->key.u, sizeof(info->key.u))) | |
1108 | return false; | |
1109 | else | |
1110 | return true; | |
1111 | } | |
1112 | ||
e305ac6c | 1113 | static int geneve_configure(struct net *net, struct net_device *dev, |
9b4437a5 | 1114 | const struct ip_tunnel_info *info, |
1115 | bool metadata, bool ipv6_rx_csum) | |
2d07dc79 JL |
1116 | { |
1117 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1118 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1119 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1120 | int err, encap_len; |
2d07dc79 | 1121 | |
9b4437a5 | 1122 | if (metadata && !is_tnl_info_zero(info)) |
8ed66f0e | 1123 | return -EINVAL; |
2d07dc79 JL |
1124 | |
1125 | geneve->net = net; | |
1126 | geneve->dev = dev; | |
1127 | ||
9b4437a5 | 1128 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1129 | if (t) |
1130 | return -EBUSY; | |
1131 | ||
184fc8b5 PA |
1132 | /* make enough headroom for basic scenario */ |
1133 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9b4437a5 | 1134 | if (ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1135 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1136 | dev->max_mtu -= sizeof(struct iphdr); |
1137 | } else { | |
184fc8b5 | 1138 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1139 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1140 | } | |
184fc8b5 PA |
1141 | dev->needed_headroom = encap_len + ETH_HLEN; |
1142 | ||
371bd106 PS |
1143 | if (metadata) { |
1144 | if (tun_on_same_port) | |
1145 | return -EPERM; | |
1146 | } else { | |
1147 | if (tun_collect_md) | |
1148 | return -EPERM; | |
1149 | } | |
1150 | ||
9b4437a5 | 1151 | dst_cache_reset(&geneve->info.dst_cache); |
1152 | geneve->info = *info; | |
1153 | geneve->collect_md = metadata; | |
1154 | geneve->use_udp6_rx_checksums = ipv6_rx_csum; | |
468dfffc | 1155 | |
2d07dc79 JL |
1156 | err = register_netdevice(dev); |
1157 | if (err) | |
1158 | return err; | |
1159 | ||
e305ac6c | 1160 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1161 | return 0; |
1162 | } | |
1163 | ||
9b4437a5 | 1164 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1165 | { | |
1166 | memset(info, 0, sizeof(*info)); | |
1167 | info->key.tp_dst = htons(dst_port); | |
1168 | } | |
1169 | ||
e305ac6c PS |
1170 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1171 | struct nlattr *tb[], struct nlattr *data[]) | |
1172 | { | |
9b4437a5 | 1173 | bool use_udp6_rx_checksums = false; |
1174 | struct ip_tunnel_info info; | |
e305ac6c | 1175 | bool metadata = false; |
9b4437a5 | 1176 | |
1177 | init_tnl_info(&info, GENEVE_UDP_PORT); | |
e305ac6c | 1178 | |
8ed66f0e JL |
1179 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
1180 | return -EINVAL; | |
1181 | ||
1182 | if (data[IFLA_GENEVE_REMOTE]) { | |
9b4437a5 | 1183 | info.key.u.ipv4.dst = |
8ed66f0e | 1184 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1185 | |
1186 | if (IN_MULTICAST(ntohl(info.key.u.ipv4.dst))) { | |
1187 | netdev_dbg(dev, "multicast remote is unsupported\n"); | |
1188 | return -EINVAL; | |
1189 | } | |
8ed66f0e JL |
1190 | } |
1191 | ||
1192 | if (data[IFLA_GENEVE_REMOTE6]) { | |
9b4437a5 | 1193 | #if IS_ENABLED(CONFIG_IPV6) |
1194 | info.mode = IP_TUNNEL_INFO_IPV6; | |
1195 | info.key.u.ipv6.dst = | |
8ed66f0e JL |
1196 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1197 | ||
9b4437a5 | 1198 | if (ipv6_addr_type(&info.key.u.ipv6.dst) & |
8ed66f0e JL |
1199 | IPV6_ADDR_LINKLOCAL) { |
1200 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1201 | return -EINVAL; | |
1202 | } | |
9b4437a5 | 1203 | if (ipv6_addr_is_multicast(&info.key.u.ipv6.dst)) { |
1204 | netdev_dbg(dev, "multicast remote is unsupported\n"); | |
1205 | return -EINVAL; | |
1206 | } | |
1207 | info.key.tun_flags |= TUNNEL_CSUM; | |
1208 | use_udp6_rx_checksums = true; | |
1209 | #else | |
1210 | return -EPFNOSUPPORT; | |
1211 | #endif | |
8ed66f0e JL |
1212 | } |
1213 | ||
9b4437a5 | 1214 | if (data[IFLA_GENEVE_ID]) { |
1215 | __u32 vni; | |
1216 | __u8 tvni[3]; | |
1217 | ||
e277de5f | 1218 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1219 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1220 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1221 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1222 | |
9b4437a5 | 1223 | info.key.tun_id = vni_to_tunnel_id(tvni); |
1224 | } | |
8760ce58 | 1225 | if (data[IFLA_GENEVE_TTL]) |
9b4437a5 | 1226 | info.key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
8760ce58 | 1227 | |
d8951125 | 1228 | if (data[IFLA_GENEVE_TOS]) |
9b4437a5 | 1229 | info.key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1230 | |
9b4437a5 | 1231 | if (data[IFLA_GENEVE_LABEL]) { |
1232 | info.key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1233 | IPV6_FLOWLABEL_MASK; | |
1234 | if (info.key.label && (!(info.mode & IP_TUNNEL_INFO_IPV6))) | |
1235 | return -EINVAL; | |
1236 | } | |
8eb3b995 | 1237 | |
e305ac6c | 1238 | if (data[IFLA_GENEVE_PORT]) |
9b4437a5 | 1239 | info.key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
2d07dc79 | 1240 | |
e305ac6c PS |
1241 | if (data[IFLA_GENEVE_COLLECT_METADATA]) |
1242 | metadata = true; | |
2d07dc79 | 1243 | |
abe492b4 | 1244 | if (data[IFLA_GENEVE_UDP_CSUM] && |
14f1f724 | 1245 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
9b4437a5 | 1246 | info.key.tun_flags |= TUNNEL_CSUM; |
abe492b4 TH |
1247 | |
1248 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1249 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
9b4437a5 | 1250 | info.key.tun_flags &= ~TUNNEL_CSUM; |
abe492b4 TH |
1251 | |
1252 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1253 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
9b4437a5 | 1254 | use_udp6_rx_checksums = false; |
abe492b4 | 1255 | |
9b4437a5 | 1256 | return geneve_configure(net, dev, &info, metadata, use_udp6_rx_checksums); |
2d07dc79 JL |
1257 | } |
1258 | ||
1259 | static void geneve_dellink(struct net_device *dev, struct list_head *head) | |
1260 | { | |
1261 | struct geneve_dev *geneve = netdev_priv(dev); | |
1262 | ||
2d07dc79 JL |
1263 | list_del(&geneve->next); |
1264 | unregister_netdevice_queue(dev, head); | |
1265 | } | |
1266 | ||
1267 | static size_t geneve_get_size(const struct net_device *dev) | |
1268 | { | |
1269 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1270 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1271 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1272 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
8eb3b995 | 1273 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1274 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1275 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1276 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1277 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1278 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
2d07dc79 JL |
1279 | 0; |
1280 | } | |
1281 | ||
1282 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1283 | { | |
1284 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 1285 | struct ip_tunnel_info *info = &geneve->info; |
1286 | __u8 tmp_vni[3]; | |
2d07dc79 JL |
1287 | __u32 vni; |
1288 | ||
9b4437a5 | 1289 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1290 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1291 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1292 | goto nla_put_failure; | |
1293 | ||
9b4437a5 | 1294 | if (ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1295 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1296 | info->key.u.ipv4.dst)) |
1297 | goto nla_put_failure; | |
1298 | ||
1299 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, | |
1300 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1301 | goto nla_put_failure; |
9b4437a5 | 1302 | |
8ed66f0e JL |
1303 | #if IS_ENABLED(CONFIG_IPV6) |
1304 | } else { | |
1305 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
9b4437a5 | 1306 | &info->key.u.ipv6.dst)) |
1307 | goto nla_put_failure; | |
1308 | ||
1309 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1310 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1311 | goto nla_put_failure; | |
1312 | ||
1313 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1314 | !geneve->use_udp6_rx_checksums)) | |
8ed66f0e JL |
1315 | goto nla_put_failure; |
1316 | #endif | |
1317 | } | |
2d07dc79 | 1318 | |
9b4437a5 | 1319 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1320 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1321 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1322 | goto nla_put_failure; |
1323 | ||
9b4437a5 | 1324 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1325 | goto nla_put_failure; |
1326 | ||
e305ac6c PS |
1327 | if (geneve->collect_md) { |
1328 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1329 | goto nla_put_failure; | |
1330 | } | |
2d07dc79 JL |
1331 | return 0; |
1332 | ||
1333 | nla_put_failure: | |
1334 | return -EMSGSIZE; | |
1335 | } | |
1336 | ||
1337 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1338 | .kind = "geneve", | |
1339 | .maxtype = IFLA_GENEVE_MAX, | |
1340 | .policy = geneve_policy, | |
1341 | .priv_size = sizeof(struct geneve_dev), | |
1342 | .setup = geneve_setup, | |
1343 | .validate = geneve_validate, | |
1344 | .newlink = geneve_newlink, | |
1345 | .dellink = geneve_dellink, | |
1346 | .get_size = geneve_get_size, | |
1347 | .fill_info = geneve_fill_info, | |
1348 | }; | |
1349 | ||
e305ac6c PS |
1350 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1351 | u8 name_assign_type, u16 dst_port) | |
1352 | { | |
1353 | struct nlattr *tb[IFLA_MAX + 1]; | |
9b4437a5 | 1354 | struct ip_tunnel_info info; |
e305ac6c | 1355 | struct net_device *dev; |
106da663 | 1356 | LIST_HEAD(list_kill); |
e305ac6c PS |
1357 | int err; |
1358 | ||
1359 | memset(tb, 0, sizeof(tb)); | |
1360 | dev = rtnl_create_link(net, name, name_assign_type, | |
1361 | &geneve_link_ops, tb); | |
1362 | if (IS_ERR(dev)) | |
1363 | return dev; | |
1364 | ||
9b4437a5 | 1365 | init_tnl_info(&info, dst_port); |
1366 | err = geneve_configure(net, dev, &info, true, true); | |
106da663 ND |
1367 | if (err) { |
1368 | free_netdev(dev); | |
1369 | return ERR_PTR(err); | |
1370 | } | |
7e059158 DW |
1371 | |
1372 | /* openvswitch users expect packet sizes to be unrestricted, | |
1373 | * so set the largest MTU we can. | |
1374 | */ | |
91572088 | 1375 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1376 | if (err) |
1377 | goto err; | |
1378 | ||
41009481 ND |
1379 | err = rtnl_configure_link(dev, NULL); |
1380 | if (err < 0) | |
1381 | goto err; | |
1382 | ||
e305ac6c | 1383 | return dev; |
9b4437a5 | 1384 | err: |
106da663 ND |
1385 | geneve_dellink(dev, &list_kill); |
1386 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1387 | return ERR_PTR(err); |
e305ac6c PS |
1388 | } |
1389 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1390 | ||
681e683f HFS |
1391 | static int geneve_netdevice_event(struct notifier_block *unused, |
1392 | unsigned long event, void *ptr) | |
1393 | { | |
1394 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1395 | ||
7c46a640 | 1396 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
681e683f HFS |
1397 | geneve_push_rx_ports(dev); |
1398 | ||
1399 | return NOTIFY_DONE; | |
1400 | } | |
1401 | ||
1402 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1403 | .notifier_call = geneve_netdevice_event, | |
1404 | }; | |
1405 | ||
2d07dc79 JL |
1406 | static __net_init int geneve_init_net(struct net *net) |
1407 | { | |
1408 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1409 | |
1410 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1411 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1412 | return 0; |
1413 | } | |
1414 | ||
1415 | static void __net_exit geneve_exit_net(struct net *net) | |
1416 | { | |
1417 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1418 | struct geneve_dev *geneve, *next; | |
1419 | struct net_device *dev, *aux; | |
1420 | LIST_HEAD(list); | |
1421 | ||
1422 | rtnl_lock(); | |
1423 | ||
1424 | /* gather any geneve devices that were moved into this ns */ | |
1425 | for_each_netdev_safe(net, dev, aux) | |
1426 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1427 | unregister_netdevice_queue(dev, &list); | |
1428 | ||
1429 | /* now gather any other geneve devices that were created in this ns */ | |
1430 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1431 | /* If geneve->dev is in the same netns, it was already added | |
1432 | * to the list by the previous loop. | |
1433 | */ | |
1434 | if (!net_eq(dev_net(geneve->dev), net)) | |
1435 | unregister_netdevice_queue(geneve->dev, &list); | |
1436 | } | |
1437 | ||
1438 | /* unregister the devices gathered above */ | |
1439 | unregister_netdevice_many(&list); | |
1440 | rtnl_unlock(); | |
1441 | } | |
1442 | ||
1443 | static struct pernet_operations geneve_net_ops = { | |
1444 | .init = geneve_init_net, | |
1445 | .exit = geneve_exit_net, | |
1446 | .id = &geneve_net_id, | |
1447 | .size = sizeof(struct geneve_net), | |
1448 | }; | |
1449 | ||
1450 | static int __init geneve_init_module(void) | |
1451 | { | |
1452 | int rc; | |
1453 | ||
1454 | rc = register_pernet_subsys(&geneve_net_ops); | |
1455 | if (rc) | |
1456 | goto out1; | |
1457 | ||
681e683f | 1458 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1459 | if (rc) |
1460 | goto out2; | |
1461 | ||
681e683f HFS |
1462 | rc = rtnl_link_register(&geneve_link_ops); |
1463 | if (rc) | |
1464 | goto out3; | |
1465 | ||
2d07dc79 | 1466 | return 0; |
681e683f HFS |
1467 | out3: |
1468 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1469 | out2: |
1470 | unregister_pernet_subsys(&geneve_net_ops); | |
1471 | out1: | |
1472 | return rc; | |
1473 | } | |
1474 | late_initcall(geneve_init_module); | |
1475 | ||
1476 | static void __exit geneve_cleanup_module(void) | |
1477 | { | |
1478 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1479 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1480 | unregister_pernet_subsys(&geneve_net_ops); |
1481 | } | |
1482 | module_exit(geneve_cleanup_module); | |
1483 | ||
1484 | MODULE_LICENSE("GPL"); | |
1485 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1486 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1487 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1488 | MODULE_ALIAS_RTNL_LINK("geneve"); |