Commit | Line | Data |
---|---|---|
2d07dc79 JL |
1 | /* |
2 | * GENEVE: Generic Network Virtualization Encapsulation | |
3 | * | |
4 | * Copyright (c) 2015 Red Hat, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
2d07dc79 JL |
15 | #include <linux/etherdevice.h> |
16 | #include <linux/hash.h> | |
e305ac6c | 17 | #include <net/dst_metadata.h> |
8e816df8 | 18 | #include <net/gro_cells.h> |
2d07dc79 JL |
19 | #include <net/rtnetlink.h> |
20 | #include <net/geneve.h> | |
371bd106 | 21 | #include <net/protocol.h> |
2d07dc79 JL |
22 | |
23 | #define GENEVE_NETDEV_VER "0.6" | |
24 | ||
25 | #define GENEVE_UDP_PORT 6081 | |
26 | ||
27 | #define GENEVE_N_VID (1u << 24) | |
28 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
29 | ||
30 | #define VNI_HASH_BITS 10 | |
31 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
32 | ||
33 | static bool log_ecn_error = true; | |
34 | module_param(log_ecn_error, bool, 0644); | |
35 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
36 | ||
371bd106 PS |
37 | #define GENEVE_VER 0 |
38 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
5edbea69 AK |
39 | #define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN) |
40 | #define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN) | |
371bd106 | 41 | |
2d07dc79 JL |
42 | /* per-network namespace private data for this module */ |
43 | struct geneve_net { | |
371bd106 | 44 | struct list_head geneve_list; |
371bd106 | 45 | struct list_head sock_list; |
2d07dc79 JL |
46 | }; |
47 | ||
c7d03a00 | 48 | static unsigned int geneve_net_id; |
371bd106 | 49 | |
4b4c21fa JB |
50 | struct geneve_dev_node { |
51 | struct hlist_node hlist; | |
52 | struct geneve_dev *geneve; | |
53 | }; | |
54 | ||
2d07dc79 JL |
55 | /* Pseudo network device */ |
56 | struct geneve_dev { | |
4b4c21fa JB |
57 | struct geneve_dev_node hlist4; /* vni hash table for IPv4 socket */ |
58 | #if IS_ENABLED(CONFIG_IPV6) | |
59 | struct geneve_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
60 | #endif | |
2d07dc79 JL |
61 | struct net *net; /* netns for packet i/o */ |
62 | struct net_device *dev; /* netdev for geneve tunnel */ | |
9b4437a5 | 63 | struct ip_tunnel_info info; |
fceb9c3e | 64 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 65 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 66 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 67 | #endif |
2d07dc79 | 68 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 69 | struct gro_cells gro_cells; |
9b4437a5 | 70 | bool collect_md; |
71 | bool use_udp6_rx_checksums; | |
52d0d404 | 72 | bool ttl_inherit; |
a025fb5f | 73 | enum ifla_geneve_df df; |
2d07dc79 JL |
74 | }; |
75 | ||
371bd106 PS |
76 | struct geneve_sock { |
77 | bool collect_md; | |
371bd106 PS |
78 | struct list_head list; |
79 | struct socket *sock; | |
80 | struct rcu_head rcu; | |
81 | int refcnt; | |
66d47003 | 82 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 83 | }; |
2d07dc79 JL |
84 | |
85 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
86 | { | |
87 | __u32 vnid; | |
88 | ||
89 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
90 | return hash_32(vnid, VNI_HASH_BITS); | |
91 | } | |
92 | ||
e305ac6c PS |
93 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
94 | { | |
95 | #ifdef __BIG_ENDIAN | |
96 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
97 | #else | |
98 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
99 | ((__force u64)vni[1] << 48) | | |
100 | ((__force u64)vni[2] << 56)); | |
101 | #endif | |
102 | } | |
103 | ||
9b4437a5 | 104 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
105 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
106 | { | |
107 | #ifdef __BIG_ENDIAN | |
108 | vni[0] = (__force __u8)(tun_id >> 16); | |
109 | vni[1] = (__force __u8)(tun_id >> 8); | |
110 | vni[2] = (__force __u8)tun_id; | |
111 | #else | |
112 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
113 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
114 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
115 | #endif | |
116 | } | |
117 | ||
2e0b26e1 | 118 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
119 | { | |
2e0b26e1 | 120 | return !memcmp(vni, &tun_id[5], 3); |
2e0b26e1 | 121 | } |
122 | ||
1e9f12ec JB |
123 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
124 | { | |
125 | return gs->sock->sk->sk_family; | |
126 | } | |
127 | ||
66d47003 | 128 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 129 | __be32 addr, u8 vni[]) |
2d07dc79 | 130 | { |
2d07dc79 | 131 | struct hlist_head *vni_list_head; |
4b4c21fa | 132 | struct geneve_dev_node *node; |
2d07dc79 JL |
133 | __u32 hash; |
134 | ||
2d07dc79 | 135 | /* Find the device for this VNI */ |
371bd106 | 136 | hash = geneve_net_vni_hash(vni); |
66d47003 | 137 | vni_list_head = &gs->vni_list[hash]; |
4b4c21fa JB |
138 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
139 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
140 | addr == node->geneve->info.key.u.ipv4.dst) | |
141 | return node->geneve; | |
8ed66f0e JL |
142 | } |
143 | return NULL; | |
144 | } | |
145 | ||
146 | #if IS_ENABLED(CONFIG_IPV6) | |
147 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
148 | struct in6_addr addr6, u8 vni[]) | |
149 | { | |
150 | struct hlist_head *vni_list_head; | |
4b4c21fa | 151 | struct geneve_dev_node *node; |
8ed66f0e JL |
152 | __u32 hash; |
153 | ||
154 | /* Find the device for this VNI */ | |
155 | hash = geneve_net_vni_hash(vni); | |
156 | vni_list_head = &gs->vni_list[hash]; | |
4b4c21fa JB |
157 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
158 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
159 | ipv6_addr_equal(&addr6, &node->geneve->info.key.u.ipv6.dst)) | |
160 | return node->geneve; | |
2d07dc79 | 161 | } |
e305ac6c PS |
162 | return NULL; |
163 | } | |
8ed66f0e | 164 | #endif |
e305ac6c | 165 | |
371bd106 PS |
166 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
167 | { | |
168 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
169 | } | |
170 | ||
9fc47545 JB |
171 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
172 | struct sk_buff *skb) | |
e305ac6c | 173 | { |
8ed66f0e | 174 | static u8 zero_vni[3]; |
9b4437a5 | 175 | u8 *vni; |
e305ac6c | 176 | |
1e9f12ec | 177 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 178 | struct iphdr *iph; |
9b4437a5 | 179 | __be32 addr; |
9fc47545 | 180 | |
8ed66f0e | 181 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 182 | |
8ed66f0e JL |
183 | if (gs->collect_md) { |
184 | vni = zero_vni; | |
185 | addr = 0; | |
186 | } else { | |
9fc47545 | 187 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
188 | addr = iph->saddr; |
189 | } | |
190 | ||
9fc47545 | 191 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 192 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 193 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 194 | static struct in6_addr zero_addr6; |
9fc47545 JB |
195 | struct ipv6hdr *ip6h; |
196 | struct in6_addr addr6; | |
197 | ||
8ed66f0e | 198 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 199 | |
8ed66f0e JL |
200 | if (gs->collect_md) { |
201 | vni = zero_vni; | |
202 | addr6 = zero_addr6; | |
203 | } else { | |
9fc47545 | 204 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
205 | addr6 = ip6h->saddr; |
206 | } | |
207 | ||
9fc47545 | 208 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
209 | #endif |
210 | } | |
9fc47545 JB |
211 | return NULL; |
212 | } | |
213 | ||
214 | /* geneve receive/decap routine */ | |
215 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
216 | struct sk_buff *skb) | |
217 | { | |
218 | struct genevehdr *gnvh = geneve_hdr(skb); | |
219 | struct metadata_dst *tun_dst = NULL; | |
220 | struct pcpu_sw_netstats *stats; | |
fe741e23 | 221 | unsigned int len; |
9fc47545 JB |
222 | int err = 0; |
223 | void *oiph; | |
2d07dc79 | 224 | |
371bd106 | 225 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 226 | __be16 flags; |
e305ac6c PS |
227 | |
228 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
229 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
230 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
231 | ||
1e9f12ec | 232 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
233 | vni_to_tunnel_id(gnvh->vni), |
234 | gnvh->opt_len * 4); | |
fe741e23 GM |
235 | if (!tun_dst) { |
236 | geneve->dev->stats.rx_dropped++; | |
e305ac6c | 237 | goto drop; |
fe741e23 | 238 | } |
e305ac6c | 239 | /* Update tunnel dst according to Geneve options. */ |
4c222798 | 240 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
256c87c1 PJV |
241 | gnvh->options, gnvh->opt_len * 4, |
242 | TUNNEL_GENEVE_OPT); | |
e305ac6c PS |
243 | } else { |
244 | /* Drop packets w/ critical options, | |
245 | * since we don't support any... | |
246 | */ | |
fe741e23 GM |
247 | if (gnvh->critical) { |
248 | geneve->dev->stats.rx_frame_errors++; | |
249 | geneve->dev->stats.rx_errors++; | |
e305ac6c | 250 | goto drop; |
fe741e23 | 251 | } |
e305ac6c | 252 | } |
2d07dc79 JL |
253 | |
254 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
255 | skb->protocol = eth_type_trans(skb, geneve->dev); |
256 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
257 | ||
e305ac6c PS |
258 | if (tun_dst) |
259 | skb_dst_set(skb, &tun_dst->dst); | |
260 | ||
2d07dc79 | 261 | /* Ignore packet loops (and multicast echo) */ |
fe741e23 GM |
262 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) { |
263 | geneve->dev->stats.rx_errors++; | |
2d07dc79 | 264 | goto drop; |
fe741e23 | 265 | } |
2d07dc79 | 266 | |
9fc47545 | 267 | oiph = skb_network_header(skb); |
2d07dc79 JL |
268 | skb_reset_network_header(skb); |
269 | ||
9fc47545 JB |
270 | if (geneve_get_sk_family(gs) == AF_INET) |
271 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 272 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
273 | else |
274 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 275 | #endif |
2d07dc79 JL |
276 | |
277 | if (unlikely(err)) { | |
8ed66f0e | 278 | if (log_ecn_error) { |
9fc47545 | 279 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
280 | net_info_ratelimited("non-ECT from %pI4 " |
281 | "with TOS=%#x\n", | |
9fc47545 JB |
282 | &((struct iphdr *)oiph)->saddr, |
283 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 284 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 285 | else |
8ed66f0e | 286 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 287 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
288 | #endif |
289 | } | |
2d07dc79 JL |
290 | if (err > 1) { |
291 | ++geneve->dev->stats.rx_frame_errors; | |
292 | ++geneve->dev->stats.rx_errors; | |
293 | goto drop; | |
294 | } | |
295 | } | |
296 | ||
fe741e23 GM |
297 | len = skb->len; |
298 | err = gro_cells_receive(&geneve->gro_cells, skb); | |
299 | if (likely(err == NET_RX_SUCCESS)) { | |
300 | stats = this_cpu_ptr(geneve->dev->tstats); | |
301 | u64_stats_update_begin(&stats->syncp); | |
302 | stats->rx_packets++; | |
303 | stats->rx_bytes += len; | |
304 | u64_stats_update_end(&stats->syncp); | |
305 | } | |
2d07dc79 JL |
306 | return; |
307 | drop: | |
308 | /* Consume bad packet */ | |
309 | kfree_skb(skb); | |
310 | } | |
311 | ||
312 | /* Setup stats when device is created */ | |
313 | static int geneve_init(struct net_device *dev) | |
314 | { | |
8e816df8 JG |
315 | struct geneve_dev *geneve = netdev_priv(dev); |
316 | int err; | |
317 | ||
2d07dc79 JL |
318 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
319 | if (!dev->tstats) | |
320 | return -ENOMEM; | |
8e816df8 JG |
321 | |
322 | err = gro_cells_init(&geneve->gro_cells, dev); | |
323 | if (err) { | |
324 | free_percpu(dev->tstats); | |
325 | return err; | |
326 | } | |
327 | ||
9b4437a5 | 328 | err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL); |
468dfffc PA |
329 | if (err) { |
330 | free_percpu(dev->tstats); | |
331 | gro_cells_destroy(&geneve->gro_cells); | |
332 | return err; | |
333 | } | |
2d07dc79 JL |
334 | return 0; |
335 | } | |
336 | ||
337 | static void geneve_uninit(struct net_device *dev) | |
338 | { | |
8e816df8 JG |
339 | struct geneve_dev *geneve = netdev_priv(dev); |
340 | ||
9b4437a5 | 341 | dst_cache_destroy(&geneve->info.dst_cache); |
8e816df8 | 342 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
343 | free_percpu(dev->tstats); |
344 | } | |
345 | ||
371bd106 PS |
346 | /* Callback from net/ipv4/udp.c to receive packets */ |
347 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
348 | { | |
349 | struct genevehdr *geneveh; | |
9fc47545 | 350 | struct geneve_dev *geneve; |
371bd106 PS |
351 | struct geneve_sock *gs; |
352 | int opts_len; | |
353 | ||
fe741e23 | 354 | /* Need UDP and Geneve header to be present */ |
371bd106 | 355 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) |
e5aed006 | 356 | goto drop; |
371bd106 PS |
357 | |
358 | /* Return packets with reserved bits set */ | |
359 | geneveh = geneve_hdr(skb); | |
360 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 361 | goto drop; |
371bd106 PS |
362 | |
363 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 364 | goto drop; |
371bd106 | 365 | |
9fc47545 JB |
366 | gs = rcu_dereference_sk_user_data(sk); |
367 | if (!gs) | |
368 | goto drop; | |
369 | ||
370 | geneve = geneve_lookup_skb(gs, skb); | |
371 | if (!geneve) | |
372 | goto drop; | |
373 | ||
371bd106 PS |
374 | opts_len = geneveh->opt_len * 4; |
375 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 | 376 | htons(ETH_P_TEB), |
fe741e23 GM |
377 | !net_eq(geneve->net, dev_net(geneve->dev)))) { |
378 | geneve->dev->stats.rx_dropped++; | |
371bd106 | 379 | goto drop; |
fe741e23 | 380 | } |
371bd106 | 381 | |
9fc47545 | 382 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
383 | return 0; |
384 | ||
385 | drop: | |
386 | /* Consume bad packet */ | |
387 | kfree_skb(skb); | |
388 | return 0; | |
371bd106 PS |
389 | } |
390 | ||
a0796644 SB |
391 | /* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */ |
392 | static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb) | |
393 | { | |
394 | struct genevehdr *geneveh; | |
395 | struct geneve_sock *gs; | |
396 | u8 zero_vni[3] = { 0 }; | |
397 | u8 *vni = zero_vni; | |
398 | ||
399 | if (skb->len < GENEVE_BASE_HLEN) | |
400 | return -EINVAL; | |
401 | ||
402 | geneveh = geneve_hdr(skb); | |
403 | if (geneveh->ver != GENEVE_VER) | |
404 | return -EINVAL; | |
405 | ||
406 | if (geneveh->proto_type != htons(ETH_P_TEB)) | |
407 | return -EINVAL; | |
408 | ||
409 | gs = rcu_dereference_sk_user_data(sk); | |
410 | if (!gs) | |
411 | return -ENOENT; | |
412 | ||
413 | if (geneve_get_sk_family(gs) == AF_INET) { | |
414 | struct iphdr *iph = ip_hdr(skb); | |
415 | __be32 addr4 = 0; | |
416 | ||
417 | if (!gs->collect_md) { | |
418 | vni = geneve_hdr(skb)->vni; | |
419 | addr4 = iph->daddr; | |
420 | } | |
421 | ||
422 | return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT; | |
423 | } | |
424 | ||
425 | #if IS_ENABLED(CONFIG_IPV6) | |
426 | if (geneve_get_sk_family(gs) == AF_INET6) { | |
427 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
8a962c4a NC |
428 | struct in6_addr addr6; |
429 | ||
430 | memset(&addr6, 0, sizeof(struct in6_addr)); | |
a0796644 SB |
431 | |
432 | if (!gs->collect_md) { | |
433 | vni = geneve_hdr(skb)->vni; | |
434 | addr6 = ip6h->daddr; | |
435 | } | |
436 | ||
437 | return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT; | |
438 | } | |
439 | #endif | |
440 | ||
441 | return -EPFNOSUPPORT; | |
442 | } | |
443 | ||
371bd106 | 444 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, |
9b4437a5 | 445 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
446 | { |
447 | struct socket *sock; | |
448 | struct udp_port_cfg udp_conf; | |
449 | int err; | |
450 | ||
451 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
452 | ||
453 | if (ipv6) { | |
454 | udp_conf.family = AF_INET6; | |
8ed66f0e | 455 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 456 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
457 | } else { |
458 | udp_conf.family = AF_INET; | |
459 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
460 | } | |
461 | ||
462 | udp_conf.local_udp_port = port; | |
463 | ||
464 | /* Open UDP socket */ | |
465 | err = udp_sock_create(net, &udp_conf, &sock); | |
466 | if (err < 0) | |
467 | return ERR_PTR(err); | |
468 | ||
469 | return sock; | |
470 | } | |
471 | ||
371bd106 PS |
472 | static int geneve_hlen(struct genevehdr *gh) |
473 | { | |
474 | return sizeof(*gh) + gh->opt_len * 4; | |
475 | } | |
476 | ||
d4546c25 DM |
477 | static struct sk_buff *geneve_gro_receive(struct sock *sk, |
478 | struct list_head *head, | |
479 | struct sk_buff *skb) | |
371bd106 | 480 | { |
d4546c25 DM |
481 | struct sk_buff *pp = NULL; |
482 | struct sk_buff *p; | |
371bd106 PS |
483 | struct genevehdr *gh, *gh2; |
484 | unsigned int hlen, gh_len, off_gnv; | |
485 | const struct packet_offload *ptype; | |
486 | __be16 type; | |
487 | int flush = 1; | |
488 | ||
489 | off_gnv = skb_gro_offset(skb); | |
490 | hlen = off_gnv + sizeof(*gh); | |
491 | gh = skb_gro_header_fast(skb, off_gnv); | |
492 | if (skb_gro_header_hard(skb, hlen)) { | |
493 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
494 | if (unlikely(!gh)) | |
495 | goto out; | |
496 | } | |
497 | ||
498 | if (gh->ver != GENEVE_VER || gh->oam) | |
499 | goto out; | |
500 | gh_len = geneve_hlen(gh); | |
501 | ||
502 | hlen = off_gnv + gh_len; | |
503 | if (skb_gro_header_hard(skb, hlen)) { | |
504 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
505 | if (unlikely(!gh)) | |
506 | goto out; | |
507 | } | |
508 | ||
d4546c25 | 509 | list_for_each_entry(p, head, list) { |
371bd106 PS |
510 | if (!NAPI_GRO_CB(p)->same_flow) |
511 | continue; | |
512 | ||
513 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
514 | if (gh->opt_len != gh2->opt_len || | |
515 | memcmp(gh, gh2, gh_len)) { | |
516 | NAPI_GRO_CB(p)->same_flow = 0; | |
517 | continue; | |
518 | } | |
519 | } | |
520 | ||
521 | type = gh->proto_type; | |
522 | ||
523 | rcu_read_lock(); | |
524 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 525 | if (!ptype) |
371bd106 | 526 | goto out_unlock; |
371bd106 PS |
527 | |
528 | skb_gro_pull(skb, gh_len); | |
529 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 530 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 531 | flush = 0; |
371bd106 PS |
532 | |
533 | out_unlock: | |
534 | rcu_read_unlock(); | |
535 | out: | |
603d4cf8 | 536 | skb_gro_flush_final(skb, pp, flush); |
371bd106 PS |
537 | |
538 | return pp; | |
539 | } | |
540 | ||
4a0090a9 TH |
541 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
542 | int nhoff) | |
371bd106 PS |
543 | { |
544 | struct genevehdr *gh; | |
545 | struct packet_offload *ptype; | |
546 | __be16 type; | |
547 | int gh_len; | |
548 | int err = -ENOSYS; | |
549 | ||
371bd106 PS |
550 | gh = (struct genevehdr *)(skb->data + nhoff); |
551 | gh_len = geneve_hlen(gh); | |
552 | type = gh->proto_type; | |
553 | ||
554 | rcu_read_lock(); | |
555 | ptype = gro_find_complete_by_type(type); | |
556 | if (ptype) | |
557 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
558 | ||
559 | rcu_read_unlock(); | |
229740c6 JR |
560 | |
561 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
562 | ||
371bd106 PS |
563 | return err; |
564 | } | |
565 | ||
566 | /* Create new listen socket if needed */ | |
567 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 568 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
569 | { |
570 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
571 | struct geneve_sock *gs; | |
572 | struct socket *sock; | |
573 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 574 | int h; |
371bd106 PS |
575 | |
576 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
577 | if (!gs) | |
578 | return ERR_PTR(-ENOMEM); | |
579 | ||
9b4437a5 | 580 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
581 | if (IS_ERR(sock)) { |
582 | kfree(gs); | |
583 | return ERR_CAST(sock); | |
584 | } | |
585 | ||
586 | gs->sock = sock; | |
587 | gs->refcnt = 1; | |
66d47003 PS |
588 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
589 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
590 | |
591 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 592 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
593 | |
594 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 595 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
596 | tunnel_cfg.sk_user_data = gs; |
597 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
598 | tunnel_cfg.gro_receive = geneve_gro_receive; |
599 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 | 600 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
a0796644 | 601 | tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup; |
371bd106 PS |
602 | tunnel_cfg.encap_destroy = NULL; |
603 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
604 | list_add(&gs->list, &gn->sock_list); |
605 | return gs; | |
606 | } | |
607 | ||
8ed66f0e | 608 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 609 | { |
8ed66f0e | 610 | if (!gs || --gs->refcnt) |
371bd106 PS |
611 | return; |
612 | ||
613 | list_del(&gs->list); | |
e7b3db5e | 614 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
615 | udp_tunnel_sock_release(gs->sock); |
616 | kfree_rcu(gs, rcu); | |
617 | } | |
618 | ||
8ed66f0e JL |
619 | static void geneve_sock_release(struct geneve_dev *geneve) |
620 | { | |
fceb9c3e | 621 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 622 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 623 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
624 | ||
625 | rcu_assign_pointer(geneve->sock6, NULL); | |
626 | #endif | |
627 | ||
628 | rcu_assign_pointer(geneve->sock4, NULL); | |
629 | synchronize_net(); | |
630 | ||
631 | __geneve_sock_release(gs4); | |
632 | #if IS_ENABLED(CONFIG_IPV6) | |
633 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
634 | #endif |
635 | } | |
636 | ||
371bd106 | 637 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 638 | sa_family_t family, |
371bd106 PS |
639 | __be16 dst_port) |
640 | { | |
641 | struct geneve_sock *gs; | |
642 | ||
643 | list_for_each_entry(gs, &gn->sock_list, list) { | |
644 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 645 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
646 | return gs; |
647 | } | |
648 | } | |
649 | return NULL; | |
650 | } | |
651 | ||
8ed66f0e | 652 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 653 | { |
2d07dc79 | 654 | struct net *net = geneve->net; |
371bd106 | 655 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
4b4c21fa | 656 | struct geneve_dev_node *node; |
2d07dc79 | 657 | struct geneve_sock *gs; |
9b4437a5 | 658 | __u8 vni[3]; |
66d47003 | 659 | __u32 hash; |
2d07dc79 | 660 | |
9b4437a5 | 661 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst); |
371bd106 PS |
662 | if (gs) { |
663 | gs->refcnt++; | |
664 | goto out; | |
665 | } | |
666 | ||
9b4437a5 | 667 | gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6, |
668 | geneve->use_udp6_rx_checksums); | |
2d07dc79 JL |
669 | if (IS_ERR(gs)) |
670 | return PTR_ERR(gs); | |
671 | ||
371bd106 PS |
672 | out: |
673 | gs->collect_md = geneve->collect_md; | |
8ed66f0e | 674 | #if IS_ENABLED(CONFIG_IPV6) |
4b4c21fa | 675 | if (ipv6) { |
fceb9c3e | 676 | rcu_assign_pointer(geneve->sock6, gs); |
4b4c21fa JB |
677 | node = &geneve->hlist6; |
678 | } else | |
8ed66f0e | 679 | #endif |
4b4c21fa | 680 | { |
fceb9c3e | 681 | rcu_assign_pointer(geneve->sock4, gs); |
4b4c21fa JB |
682 | node = &geneve->hlist4; |
683 | } | |
684 | node->geneve = geneve; | |
66d47003 | 685 | |
9b4437a5 | 686 | tunnel_id_to_vni(geneve->info.key.tun_id, vni); |
687 | hash = geneve_net_vni_hash(vni); | |
4b4c21fa | 688 | hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
689 | return 0; |
690 | } | |
691 | ||
8ed66f0e JL |
692 | static int geneve_open(struct net_device *dev) |
693 | { | |
694 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 695 | bool ipv6 = !!(geneve->info.mode & IP_TUNNEL_INFO_IPV6); |
8ed66f0e JL |
696 | bool metadata = geneve->collect_md; |
697 | int ret = 0; | |
698 | ||
8ed66f0e | 699 | #if IS_ENABLED(CONFIG_IPV6) |
8ed66f0e JL |
700 | if (ipv6 || metadata) |
701 | ret = geneve_sock_add(geneve, true); | |
702 | #endif | |
703 | if (!ret && (!ipv6 || metadata)) | |
704 | ret = geneve_sock_add(geneve, false); | |
705 | if (ret < 0) | |
706 | geneve_sock_release(geneve); | |
707 | ||
708 | return ret; | |
709 | } | |
710 | ||
2d07dc79 JL |
711 | static int geneve_stop(struct net_device *dev) |
712 | { | |
713 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 714 | |
4b4c21fa JB |
715 | hlist_del_init_rcu(&geneve->hlist4.hlist); |
716 | #if IS_ENABLED(CONFIG_IPV6) | |
717 | hlist_del_init_rcu(&geneve->hlist6.hlist); | |
718 | #endif | |
8ed66f0e | 719 | geneve_sock_release(geneve); |
371bd106 PS |
720 | return 0; |
721 | } | |
722 | ||
8ed66f0e | 723 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 724 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
725 | { |
726 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 727 | geneveh->opt_len = info->options_len / 4; |
728 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
729 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 730 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 731 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
732 | geneveh->proto_type = htons(ETH_P_TEB); |
733 | geneveh->rsvd2 = 0; | |
734 | ||
256c87c1 PJV |
735 | if (info->key.tun_flags & TUNNEL_GENEVE_OPT) |
736 | ip_tunnel_info_opts_get(geneveh->options, info); | |
8ed66f0e JL |
737 | } |
738 | ||
c3ef5aa5 | 739 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
740 | const struct ip_tunnel_info *info, | |
741 | bool xnet, int ip_hdr_len) | |
371bd106 | 742 | { |
c3ef5aa5 | 743 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
744 | struct genevehdr *gnvh; |
745 | int min_headroom; | |
746 | int err; | |
747 | ||
c3ef5aa5 | 748 | skb_reset_mac_header(skb); |
8ed66f0e JL |
749 | skb_scrub_packet(skb, xnet); |
750 | ||
c3ef5aa5 | 751 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
752 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 753 | err = skb_cow_head(skb, min_headroom); |
aed069df | 754 | if (unlikely(err)) |
8ed66f0e | 755 | goto free_dst; |
8ed66f0e | 756 | |
aed069df | 757 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 758 | if (err) |
8ed66f0e | 759 | goto free_dst; |
8ed66f0e | 760 | |
d58ff351 | 761 | gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len); |
c3ef5aa5 | 762 | geneve_build_header(gnvh, info); |
8ed66f0e JL |
763 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
764 | return 0; | |
765 | ||
766 | free_dst: | |
767 | dst_release(dst); | |
768 | return err; | |
769 | } | |
8ed66f0e JL |
770 | |
771 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
772 | struct net_device *dev, | |
5b861f6b | 773 | struct geneve_sock *gs4, |
8ed66f0e | 774 | struct flowi4 *fl4, |
c3ef5aa5 | 775 | const struct ip_tunnel_info *info) |
e305ac6c | 776 | { |
db3c6139 | 777 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 778 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 779 | struct dst_cache *dst_cache; |
e305ac6c PS |
780 | struct rtable *rt = NULL; |
781 | __u8 tos; | |
782 | ||
5b861f6b | 783 | if (!gs4) |
fceb9c3e | 784 | return ERR_PTR(-EIO); |
785 | ||
e305ac6c PS |
786 | memset(fl4, 0, sizeof(*fl4)); |
787 | fl4->flowi4_mark = skb->mark; | |
788 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 789 | fl4->daddr = info->key.u.ipv4.dst; |
790 | fl4->saddr = info->key.u.ipv4.src; | |
e305ac6c | 791 | |
9b4437a5 | 792 | tos = info->key.tos; |
793 | if ((tos == 1) && !geneve->collect_md) { | |
794 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
795 | use_cache = false; | |
468dfffc | 796 | } |
9b4437a5 | 797 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 798 | |
c3ef5aa5 | 799 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
800 | if (use_cache) { |
801 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
802 | if (rt) | |
803 | return rt; | |
e305ac6c | 804 | } |
e305ac6c PS |
805 | rt = ip_route_output_key(geneve->net, fl4); |
806 | if (IS_ERR(rt)) { | |
807 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 808 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
809 | } |
810 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
811 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 812 | ip_rt_put(rt); |
fc4099f1 | 813 | return ERR_PTR(-ELOOP); |
e305ac6c | 814 | } |
468dfffc PA |
815 | if (use_cache) |
816 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
817 | return rt; |
818 | } | |
819 | ||
8ed66f0e JL |
820 | #if IS_ENABLED(CONFIG_IPV6) |
821 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
822 | struct net_device *dev, | |
5b861f6b | 823 | struct geneve_sock *gs6, |
8ed66f0e | 824 | struct flowi6 *fl6, |
c3ef5aa5 | 825 | const struct ip_tunnel_info *info) |
8ed66f0e | 826 | { |
db3c6139 | 827 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 828 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 829 | struct dst_entry *dst = NULL; |
468dfffc | 830 | struct dst_cache *dst_cache; |
3a56f86f | 831 | __u8 prio; |
8ed66f0e | 832 | |
fceb9c3e | 833 | if (!gs6) |
834 | return ERR_PTR(-EIO); | |
835 | ||
8ed66f0e JL |
836 | memset(fl6, 0, sizeof(*fl6)); |
837 | fl6->flowi6_mark = skb->mark; | |
838 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 839 | fl6->daddr = info->key.u.ipv6.dst; |
840 | fl6->saddr = info->key.u.ipv6.src; | |
841 | prio = info->key.tos; | |
842 | if ((prio == 1) && !geneve->collect_md) { | |
843 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
844 | use_cache = false; | |
468dfffc PA |
845 | } |
846 | ||
9b4437a5 | 847 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
848 | info->key.label); | |
c3ef5aa5 | 849 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
850 | if (use_cache) { |
851 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
852 | if (dst) | |
853 | return dst; | |
8ed66f0e | 854 | } |
8ed66f0e JL |
855 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { |
856 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
857 | return ERR_PTR(-ENETUNREACH); | |
858 | } | |
859 | if (dst->dev == dev) { /* is this necessary? */ | |
860 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
861 | dst_release(dst); | |
862 | return ERR_PTR(-ELOOP); | |
863 | } | |
864 | ||
468dfffc PA |
865 | if (use_cache) |
866 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
867 | return dst; |
868 | } | |
869 | #endif | |
870 | ||
9b4437a5 | 871 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 872 | struct geneve_dev *geneve, |
873 | const struct ip_tunnel_info *info) | |
2d07dc79 | 874 | { |
9b4437a5 | 875 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
876 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
877 | const struct ip_tunnel_key *key = &info->key; | |
878 | struct rtable *rt; | |
2d07dc79 | 879 | struct flowi4 fl4; |
8760ce58 | 880 | __u8 tos, ttl; |
a025fb5f | 881 | __be16 df = 0; |
e305ac6c | 882 | __be16 sport; |
bcceeec3 | 883 | int err; |
980c394c | 884 | |
5b861f6b | 885 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
9b4437a5 | 886 | if (IS_ERR(rt)) |
887 | return PTR_ERR(rt); | |
371bd106 | 888 | |
6b4f92af SB |
889 | skb_tunnel_check_pmtu(skb, &rt->dst, |
890 | GENEVE_IPV4_HLEN + info->options_len); | |
52a589d5 | 891 | |
371bd106 | 892 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 893 | if (geneve->collect_md) { |
894 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
371bd106 | 895 | ttl = key->ttl; |
a025fb5f SB |
896 | |
897 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 898 | } else { |
9b4437a5 | 899 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
52d0d404 HL |
900 | if (geneve->ttl_inherit) |
901 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
902 | else | |
903 | ttl = key->ttl; | |
904 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
a025fb5f SB |
905 | |
906 | if (geneve->df == GENEVE_DF_SET) { | |
907 | df = htons(IP_DF); | |
908 | } else if (geneve->df == GENEVE_DF_INHERIT) { | |
909 | struct ethhdr *eth = eth_hdr(skb); | |
910 | ||
911 | if (ntohs(eth->h_proto) == ETH_P_IPV6) { | |
912 | df = htons(IP_DF); | |
913 | } else if (ntohs(eth->h_proto) == ETH_P_IP) { | |
914 | struct iphdr *iph = ip_hdr(skb); | |
915 | ||
916 | if (iph->frag_off & htons(IP_DF)) | |
917 | df = htons(IP_DF); | |
918 | } | |
919 | } | |
2d07dc79 | 920 | } |
2d07dc79 | 921 | |
c3ef5aa5 | 922 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 923 | if (unlikely(err)) |
924 | return err; | |
efeb2267 | 925 | |
9b4437a5 | 926 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
927 | tos, ttl, df, sport, geneve->info.key.tp_dst, | |
928 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
929 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
930 | return 0; | |
2d07dc79 JL |
931 | } |
932 | ||
8ed66f0e | 933 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 934 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 935 | struct geneve_dev *geneve, |
936 | const struct ip_tunnel_info *info) | |
8ed66f0e | 937 | { |
9b4437a5 | 938 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
939 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
940 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 941 | struct dst_entry *dst = NULL; |
8ed66f0e | 942 | struct flowi6 fl6; |
3a56f86f | 943 | __u8 prio, ttl; |
8ed66f0e | 944 | __be16 sport; |
bcceeec3 | 945 | int err; |
8ed66f0e | 946 | |
5b861f6b | 947 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
9b4437a5 | 948 | if (IS_ERR(dst)) |
949 | return PTR_ERR(dst); | |
8ed66f0e | 950 | |
6b4f92af | 951 | skb_tunnel_check_pmtu(skb, dst, GENEVE_IPV6_HLEN + info->options_len); |
52a589d5 | 952 | |
8ed66f0e | 953 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 954 | if (geneve->collect_md) { |
955 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
956 | ttl = key->ttl; | |
957 | } else { | |
958 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
959 | ip_hdr(skb), skb); | |
52d0d404 HL |
960 | if (geneve->ttl_inherit) |
961 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
962 | else | |
963 | ttl = key->ttl; | |
964 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
9b4437a5 | 965 | } |
31ac1c19 | 966 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 967 | if (unlikely(err)) |
968 | return err; | |
8ed66f0e | 969 | |
9b4437a5 | 970 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
971 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
972 | info->key.label, sport, geneve->info.key.tp_dst, | |
973 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
974 | return 0; | |
975 | } | |
976 | #endif | |
8ed66f0e | 977 | |
9b4437a5 | 978 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
979 | { | |
980 | struct geneve_dev *geneve = netdev_priv(dev); | |
981 | struct ip_tunnel_info *info = NULL; | |
982 | int err; | |
abe492b4 | 983 | |
9b4437a5 | 984 | if (geneve->collect_md) { |
985 | info = skb_tunnel_info(skb); | |
986 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
987 | err = -EINVAL; | |
988 | netdev_dbg(dev, "no tunnel metadata\n"); | |
aed069df | 989 | goto tx_error; |
9b4437a5 | 990 | } |
8ed66f0e | 991 | } else { |
9b4437a5 | 992 | info = &geneve->info; |
8ed66f0e | 993 | } |
8eb3b995 | 994 | |
a717e3f7 | 995 | rcu_read_lock(); |
9b4437a5 | 996 | #if IS_ENABLED(CONFIG_IPV6) |
997 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
998 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
999 | else | |
1000 | #endif | |
1001 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
a717e3f7 | 1002 | rcu_read_unlock(); |
8ed66f0e | 1003 | |
9b4437a5 | 1004 | if (likely(!err)) |
1005 | return NETDEV_TX_OK; | |
8ed66f0e JL |
1006 | tx_error: |
1007 | dev_kfree_skb(skb); | |
aed069df | 1008 | |
8ed66f0e JL |
1009 | if (err == -ELOOP) |
1010 | dev->stats.collisions++; | |
1011 | else if (err == -ENETUNREACH) | |
1012 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1013 | |
1014 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1015 | return NETDEV_TX_OK; |
1016 | } | |
8ed66f0e | 1017 | |
91572088 | 1018 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 1019 | { |
91572088 JW |
1020 | if (new_mtu > dev->max_mtu) |
1021 | new_mtu = dev->max_mtu; | |
321acc1c AK |
1022 | else if (new_mtu < dev->min_mtu) |
1023 | new_mtu = dev->min_mtu; | |
aeee0e66 | 1024 | |
55e5bfb5 DW |
1025 | dev->mtu = new_mtu; |
1026 | return 0; | |
1027 | } | |
1028 | ||
fc4099f1 PS |
1029 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1030 | { | |
1031 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1032 | struct geneve_dev *geneve = netdev_priv(dev); | |
fc4099f1 | 1033 | |
b8812fa8 | 1034 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 1035 | struct rtable *rt; |
1036 | struct flowi4 fl4; | |
5b861f6b | 1037 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); |
9b4437a5 | 1038 | |
5b861f6b | 1039 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
b8812fa8 JL |
1040 | if (IS_ERR(rt)) |
1041 | return PTR_ERR(rt); | |
fc4099f1 | 1042 | |
b8812fa8 JL |
1043 | ip_rt_put(rt); |
1044 | info->key.u.ipv4.src = fl4.saddr; | |
1045 | #if IS_ENABLED(CONFIG_IPV6) | |
1046 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 1047 | struct dst_entry *dst; |
1048 | struct flowi6 fl6; | |
5b861f6b | 1049 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); |
9b4437a5 | 1050 | |
5b861f6b | 1051 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
b8812fa8 JL |
1052 | if (IS_ERR(dst)) |
1053 | return PTR_ERR(dst); | |
1054 | ||
1055 | dst_release(dst); | |
1056 | info->key.u.ipv6.src = fl6.saddr; | |
1057 | #endif | |
1058 | } else { | |
1059 | return -EINVAL; | |
1060 | } | |
fc4099f1 | 1061 | |
fc4099f1 PS |
1062 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1063 | 1, USHRT_MAX, true); | |
9b4437a5 | 1064 | info->key.tp_dst = geneve->info.key.tp_dst; |
fc4099f1 PS |
1065 | return 0; |
1066 | } | |
1067 | ||
2d07dc79 JL |
1068 | static const struct net_device_ops geneve_netdev_ops = { |
1069 | .ndo_init = geneve_init, | |
1070 | .ndo_uninit = geneve_uninit, | |
1071 | .ndo_open = geneve_open, | |
1072 | .ndo_stop = geneve_stop, | |
1073 | .ndo_start_xmit = geneve_xmit, | |
1074 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1075 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1076 | .ndo_validate_addr = eth_validate_addr, |
1077 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1078 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1079 | }; |
1080 | ||
1081 | static void geneve_get_drvinfo(struct net_device *dev, | |
1082 | struct ethtool_drvinfo *drvinfo) | |
1083 | { | |
1084 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1085 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1086 | } | |
1087 | ||
1088 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1089 | .get_drvinfo = geneve_get_drvinfo, | |
1090 | .get_link = ethtool_op_get_link, | |
1091 | }; | |
1092 | ||
1093 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1094 | static struct device_type geneve_type = { | |
1095 | .name = "geneve", | |
1096 | }; | |
1097 | ||
e5de25dc | 1098 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1099 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1100 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1101 | */ |
2d2b13fc | 1102 | static void geneve_offload_rx_ports(struct net_device *dev, bool push) |
05ca4029 SA |
1103 | { |
1104 | struct net *net = dev_net(dev); | |
1105 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1106 | struct geneve_sock *gs; | |
681e683f | 1107 | |
05ca4029 | 1108 | rcu_read_lock(); |
2d2b13fc SD |
1109 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { |
1110 | if (push) { | |
1111 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1112 | UDP_TUNNEL_TYPE_GENEVE); | |
1113 | } else { | |
1114 | udp_tunnel_drop_rx_port(dev, gs->sock, | |
1115 | UDP_TUNNEL_TYPE_GENEVE); | |
1116 | } | |
1117 | } | |
05ca4029 SA |
1118 | rcu_read_unlock(); |
1119 | } | |
05ca4029 | 1120 | |
2d07dc79 JL |
1121 | /* Initialize the device structure. */ |
1122 | static void geneve_setup(struct net_device *dev) | |
1123 | { | |
1124 | ether_setup(dev); | |
1125 | ||
1126 | dev->netdev_ops = &geneve_netdev_ops; | |
1127 | dev->ethtool_ops = &geneve_ethtool_ops; | |
cf124db5 | 1128 | dev->needs_free_netdev = true; |
2d07dc79 JL |
1129 | |
1130 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1131 | ||
2d07dc79 JL |
1132 | dev->features |= NETIF_F_LLTX; |
1133 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1134 | dev->features |= NETIF_F_RXCSUM; | |
1135 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1136 | ||
2d07dc79 JL |
1137 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1138 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1139 | |
91572088 JW |
1140 | /* MTU range: 68 - (something less than 65535) */ |
1141 | dev->min_mtu = ETH_MIN_MTU; | |
1142 | /* The max_mtu calculation does not take account of GENEVE | |
1143 | * options, to avoid excluding potentially valid | |
1144 | * configurations. This will be further reduced by IPvX hdr size. | |
1145 | */ | |
1146 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1147 | ||
2d07dc79 | 1148 | netif_keep_dst(dev); |
fc41cdb3 | 1149 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1150 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1151 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1152 | } |
1153 | ||
1154 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1155 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1156 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1157 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1158 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1159 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1160 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1161 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1162 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1163 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1164 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1165 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
52d0d404 | 1166 | [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 }, |
a025fb5f | 1167 | [IFLA_GENEVE_DF] = { .type = NLA_U8 }, |
2d07dc79 JL |
1168 | }; |
1169 | ||
a8b8a889 MS |
1170 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], |
1171 | struct netlink_ext_ack *extack) | |
2d07dc79 JL |
1172 | { |
1173 | if (tb[IFLA_ADDRESS]) { | |
c5ebc440 GM |
1174 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1175 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1176 | "Provided link layer address is not Ethernet"); | |
2d07dc79 | 1177 | return -EINVAL; |
c5ebc440 | 1178 | } |
2d07dc79 | 1179 | |
c5ebc440 GM |
1180 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
1181 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1182 | "Provided Ethernet address is not unicast"); | |
2d07dc79 | 1183 | return -EADDRNOTAVAIL; |
c5ebc440 | 1184 | } |
2d07dc79 JL |
1185 | } |
1186 | ||
c5ebc440 GM |
1187 | if (!data) { |
1188 | NL_SET_ERR_MSG(extack, | |
1189 | "Not enough attributes provided to perform the operation"); | |
2d07dc79 | 1190 | return -EINVAL; |
c5ebc440 | 1191 | } |
2d07dc79 JL |
1192 | |
1193 | if (data[IFLA_GENEVE_ID]) { | |
1194 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1195 | ||
c5ebc440 GM |
1196 | if (vni >= GENEVE_N_VID) { |
1197 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID], | |
1198 | "Geneve ID must be lower than 16777216"); | |
2d07dc79 | 1199 | return -ERANGE; |
c5ebc440 | 1200 | } |
2d07dc79 JL |
1201 | } |
1202 | ||
a025fb5f SB |
1203 | if (data[IFLA_GENEVE_DF]) { |
1204 | enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1205 | ||
1206 | if (df < 0 || df > GENEVE_DF_MAX) { | |
1207 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_GENEVE_DF], | |
1208 | "Invalid DF attribute"); | |
1209 | return -EINVAL; | |
1210 | } | |
1211 | } | |
1212 | ||
2d07dc79 JL |
1213 | return 0; |
1214 | } | |
1215 | ||
371bd106 | 1216 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1217 | const struct ip_tunnel_info *info, |
371bd106 PS |
1218 | bool *tun_on_same_port, |
1219 | bool *tun_collect_md) | |
1220 | { | |
9b4437a5 | 1221 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1222 | |
1223 | *tun_on_same_port = false; | |
1224 | *tun_collect_md = false; | |
371bd106 | 1225 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9b4437a5 | 1226 | if (info->key.tp_dst == geneve->info.key.tp_dst) { |
371bd106 PS |
1227 | *tun_collect_md = geneve->collect_md; |
1228 | *tun_on_same_port = true; | |
1229 | } | |
9b4437a5 | 1230 | if (info->key.tun_id == geneve->info.key.tun_id && |
1231 | info->key.tp_dst == geneve->info.key.tp_dst && | |
1232 | !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1233 | t = geneve; |
1234 | } | |
1235 | return t; | |
1236 | } | |
1237 | ||
9b4437a5 | 1238 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) |
1239 | { | |
3fa5f11d SB |
1240 | return !(info->key.tun_id || info->key.tun_flags || info->key.tos || |
1241 | info->key.ttl || info->key.label || info->key.tp_src || | |
1242 | memchr_inv(&info->key.u, 0, sizeof(info->key.u))); | |
9b4437a5 | 1243 | } |
1244 | ||
5b861f6b GM |
1245 | static bool geneve_dst_addr_equal(struct ip_tunnel_info *a, |
1246 | struct ip_tunnel_info *b) | |
1247 | { | |
1248 | if (ip_tunnel_info_af(a) == AF_INET) | |
1249 | return a->key.u.ipv4.dst == b->key.u.ipv4.dst; | |
1250 | else | |
1251 | return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst); | |
1252 | } | |
1253 | ||
e305ac6c | 1254 | static int geneve_configure(struct net *net, struct net_device *dev, |
c5ebc440 | 1255 | struct netlink_ext_ack *extack, |
9b4437a5 | 1256 | const struct ip_tunnel_info *info, |
52d0d404 | 1257 | bool metadata, bool ipv6_rx_csum, |
a025fb5f | 1258 | bool ttl_inherit, enum ifla_geneve_df df) |
2d07dc79 JL |
1259 | { |
1260 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1261 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1262 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1263 | int err, encap_len; |
2d07dc79 | 1264 | |
c5ebc440 GM |
1265 | if (metadata && !is_tnl_info_zero(info)) { |
1266 | NL_SET_ERR_MSG(extack, | |
1267 | "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified"); | |
8ed66f0e | 1268 | return -EINVAL; |
c5ebc440 | 1269 | } |
2d07dc79 JL |
1270 | |
1271 | geneve->net = net; | |
1272 | geneve->dev = dev; | |
1273 | ||
9b4437a5 | 1274 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1275 | if (t) |
1276 | return -EBUSY; | |
1277 | ||
184fc8b5 PA |
1278 | /* make enough headroom for basic scenario */ |
1279 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9a1c44d9 | 1280 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1281 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1282 | dev->max_mtu -= sizeof(struct iphdr); |
1283 | } else { | |
184fc8b5 | 1284 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1285 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1286 | } | |
184fc8b5 PA |
1287 | dev->needed_headroom = encap_len + ETH_HLEN; |
1288 | ||
371bd106 | 1289 | if (metadata) { |
c5ebc440 GM |
1290 | if (tun_on_same_port) { |
1291 | NL_SET_ERR_MSG(extack, | |
1292 | "There can be only one externally controlled device on a destination port"); | |
371bd106 | 1293 | return -EPERM; |
c5ebc440 | 1294 | } |
371bd106 | 1295 | } else { |
c5ebc440 GM |
1296 | if (tun_collect_md) { |
1297 | NL_SET_ERR_MSG(extack, | |
1298 | "There already exists an externally controlled device on this destination port"); | |
371bd106 | 1299 | return -EPERM; |
c5ebc440 | 1300 | } |
371bd106 PS |
1301 | } |
1302 | ||
9b4437a5 | 1303 | dst_cache_reset(&geneve->info.dst_cache); |
1304 | geneve->info = *info; | |
1305 | geneve->collect_md = metadata; | |
1306 | geneve->use_udp6_rx_checksums = ipv6_rx_csum; | |
52d0d404 | 1307 | geneve->ttl_inherit = ttl_inherit; |
a025fb5f | 1308 | geneve->df = df; |
468dfffc | 1309 | |
2d07dc79 JL |
1310 | err = register_netdevice(dev); |
1311 | if (err) | |
1312 | return err; | |
1313 | ||
e305ac6c | 1314 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1315 | return 0; |
1316 | } | |
1317 | ||
9b4437a5 | 1318 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1319 | { | |
1320 | memset(info, 0, sizeof(*info)); | |
1321 | info->key.tp_dst = htons(dst_port); | |
1322 | } | |
1323 | ||
c5ebc440 GM |
1324 | static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[], |
1325 | struct netlink_ext_ack *extack, | |
1326 | struct ip_tunnel_info *info, bool *metadata, | |
52d0d404 | 1327 | bool *use_udp6_rx_checksums, bool *ttl_inherit, |
a025fb5f | 1328 | enum ifla_geneve_df *df, bool changelink) |
e305ac6c | 1329 | { |
c5ebc440 GM |
1330 | int attrtype; |
1331 | ||
1332 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) { | |
1333 | NL_SET_ERR_MSG(extack, | |
1334 | "Cannot specify both IPv4 and IPv6 Remote addresses"); | |
8ed66f0e | 1335 | return -EINVAL; |
c5ebc440 | 1336 | } |
8ed66f0e JL |
1337 | |
1338 | if (data[IFLA_GENEVE_REMOTE]) { | |
c5ebc440 GM |
1339 | if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) { |
1340 | attrtype = IFLA_GENEVE_REMOTE; | |
1341 | goto change_notsup; | |
1342 | } | |
5b861f6b GM |
1343 | |
1344 | info->key.u.ipv4.dst = | |
8ed66f0e | 1345 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1346 | |
5b861f6b | 1347 | if (IN_MULTICAST(ntohl(info->key.u.ipv4.dst))) { |
c5ebc440 GM |
1348 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE], |
1349 | "Remote IPv4 address cannot be Multicast"); | |
9b4437a5 | 1350 | return -EINVAL; |
1351 | } | |
8ed66f0e JL |
1352 | } |
1353 | ||
1354 | if (data[IFLA_GENEVE_REMOTE6]) { | |
4c52a889 | 1355 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1356 | if (changelink && (ip_tunnel_info_af(info) == AF_INET)) { |
1357 | attrtype = IFLA_GENEVE_REMOTE6; | |
1358 | goto change_notsup; | |
1359 | } | |
5b861f6b GM |
1360 | |
1361 | info->mode = IP_TUNNEL_INFO_IPV6; | |
1362 | info->key.u.ipv6.dst = | |
8ed66f0e JL |
1363 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1364 | ||
5b861f6b | 1365 | if (ipv6_addr_type(&info->key.u.ipv6.dst) & |
8ed66f0e | 1366 | IPV6_ADDR_LINKLOCAL) { |
c5ebc440 GM |
1367 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1368 | "Remote IPv6 address cannot be link-local"); | |
8ed66f0e JL |
1369 | return -EINVAL; |
1370 | } | |
5b861f6b | 1371 | if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) { |
c5ebc440 GM |
1372 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1373 | "Remote IPv6 address cannot be Multicast"); | |
9b4437a5 | 1374 | return -EINVAL; |
1375 | } | |
5b861f6b GM |
1376 | info->key.tun_flags |= TUNNEL_CSUM; |
1377 | *use_udp6_rx_checksums = true; | |
9b4437a5 | 1378 | #else |
c5ebc440 GM |
1379 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1380 | "IPv6 support not enabled in the kernel"); | |
9b4437a5 | 1381 | return -EPFNOSUPPORT; |
1382 | #endif | |
8ed66f0e JL |
1383 | } |
1384 | ||
9b4437a5 | 1385 | if (data[IFLA_GENEVE_ID]) { |
1386 | __u32 vni; | |
1387 | __u8 tvni[3]; | |
5b861f6b | 1388 | __be64 tunid; |
9b4437a5 | 1389 | |
e277de5f | 1390 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1391 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1392 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1393 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1394 | |
5b861f6b | 1395 | tunid = vni_to_tunnel_id(tvni); |
c5ebc440 GM |
1396 | if (changelink && (tunid != info->key.tun_id)) { |
1397 | attrtype = IFLA_GENEVE_ID; | |
1398 | goto change_notsup; | |
1399 | } | |
5b861f6b | 1400 | info->key.tun_id = tunid; |
9b4437a5 | 1401 | } |
5b861f6b | 1402 | |
a97d97ba HL |
1403 | if (data[IFLA_GENEVE_TTL_INHERIT]) { |
1404 | if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT])) | |
1405 | *ttl_inherit = true; | |
1406 | else | |
1407 | *ttl_inherit = false; | |
1408 | } else if (data[IFLA_GENEVE_TTL]) { | |
5b861f6b | 1409 | info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
a97d97ba HL |
1410 | *ttl_inherit = false; |
1411 | } | |
52d0d404 | 1412 | |
d8951125 | 1413 | if (data[IFLA_GENEVE_TOS]) |
5b861f6b | 1414 | info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1415 | |
a025fb5f SB |
1416 | if (data[IFLA_GENEVE_DF]) |
1417 | *df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1418 | ||
9b4437a5 | 1419 | if (data[IFLA_GENEVE_LABEL]) { |
5b861f6b | 1420 | info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & |
9b4437a5 | 1421 | IPV6_FLOWLABEL_MASK; |
c5ebc440 GM |
1422 | if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) { |
1423 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL], | |
1424 | "Label attribute only applies for IPv6 Geneve devices"); | |
9b4437a5 | 1425 | return -EINVAL; |
c5ebc440 | 1426 | } |
9b4437a5 | 1427 | } |
8eb3b995 | 1428 | |
5b861f6b | 1429 | if (data[IFLA_GENEVE_PORT]) { |
c5ebc440 GM |
1430 | if (changelink) { |
1431 | attrtype = IFLA_GENEVE_PORT; | |
1432 | goto change_notsup; | |
1433 | } | |
5b861f6b GM |
1434 | info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
1435 | } | |
2d07dc79 | 1436 | |
5b861f6b | 1437 | if (data[IFLA_GENEVE_COLLECT_METADATA]) { |
c5ebc440 GM |
1438 | if (changelink) { |
1439 | attrtype = IFLA_GENEVE_COLLECT_METADATA; | |
1440 | goto change_notsup; | |
1441 | } | |
5b861f6b GM |
1442 | *metadata = true; |
1443 | } | |
2d07dc79 | 1444 | |
5b861f6b | 1445 | if (data[IFLA_GENEVE_UDP_CSUM]) { |
c5ebc440 GM |
1446 | if (changelink) { |
1447 | attrtype = IFLA_GENEVE_UDP_CSUM; | |
1448 | goto change_notsup; | |
1449 | } | |
5b861f6b GM |
1450 | if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1451 | info->key.tun_flags |= TUNNEL_CSUM; | |
1452 | } | |
abe492b4 | 1453 | |
5b861f6b | 1454 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { |
f9094b76 | 1455 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1456 | if (changelink) { |
1457 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX; | |
1458 | goto change_notsup; | |
1459 | } | |
5b861f6b GM |
1460 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) |
1461 | info->key.tun_flags &= ~TUNNEL_CSUM; | |
f9094b76 HL |
1462 | #else |
1463 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX], | |
1464 | "IPv6 support not enabled in the kernel"); | |
1465 | return -EPFNOSUPPORT; | |
1466 | #endif | |
5b861f6b | 1467 | } |
abe492b4 | 1468 | |
5b861f6b | 1469 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { |
f9094b76 | 1470 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1471 | if (changelink) { |
1472 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX; | |
1473 | goto change_notsup; | |
1474 | } | |
5b861f6b GM |
1475 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) |
1476 | *use_udp6_rx_checksums = false; | |
f9094b76 HL |
1477 | #else |
1478 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX], | |
1479 | "IPv6 support not enabled in the kernel"); | |
1480 | return -EPFNOSUPPORT; | |
1481 | #endif | |
5b861f6b GM |
1482 | } |
1483 | ||
1484 | return 0; | |
c5ebc440 GM |
1485 | change_notsup: |
1486 | NL_SET_ERR_MSG_ATTR(extack, data[attrtype], | |
1487 | "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported"); | |
1488 | return -EOPNOTSUPP; | |
5b861f6b GM |
1489 | } |
1490 | ||
c40e89fd AK |
1491 | static void geneve_link_config(struct net_device *dev, |
1492 | struct ip_tunnel_info *info, struct nlattr *tb[]) | |
1493 | { | |
1494 | struct geneve_dev *geneve = netdev_priv(dev); | |
1495 | int ldev_mtu = 0; | |
1496 | ||
1497 | if (tb[IFLA_MTU]) { | |
1498 | geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1499 | return; | |
1500 | } | |
1501 | ||
1502 | switch (ip_tunnel_info_af(info)) { | |
1503 | case AF_INET: { | |
1504 | struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst }; | |
1505 | struct rtable *rt = ip_route_output_key(geneve->net, &fl4); | |
1506 | ||
1507 | if (!IS_ERR(rt) && rt->dst.dev) { | |
1508 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN; | |
1509 | ip_rt_put(rt); | |
1510 | } | |
1511 | break; | |
1512 | } | |
1513 | #if IS_ENABLED(CONFIG_IPV6) | |
1514 | case AF_INET6: { | |
1515 | struct rt6_info *rt = rt6_lookup(geneve->net, | |
1516 | &info->key.u.ipv6.dst, NULL, 0, | |
1517 | NULL, 0); | |
1518 | ||
1519 | if (rt && rt->dst.dev) | |
1520 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN; | |
1521 | ip6_rt_put(rt); | |
1522 | break; | |
1523 | } | |
1524 | #endif | |
1525 | } | |
1526 | ||
1527 | if (ldev_mtu <= 0) | |
1528 | return; | |
1529 | ||
1530 | geneve_change_mtu(dev, ldev_mtu - info->options_len); | |
1531 | } | |
1532 | ||
5b861f6b GM |
1533 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1534 | struct nlattr *tb[], struct nlattr *data[], | |
1535 | struct netlink_ext_ack *extack) | |
1536 | { | |
a025fb5f | 1537 | enum ifla_geneve_df df = GENEVE_DF_UNSET; |
5b861f6b GM |
1538 | bool use_udp6_rx_checksums = false; |
1539 | struct ip_tunnel_info info; | |
52d0d404 | 1540 | bool ttl_inherit = false; |
5b861f6b GM |
1541 | bool metadata = false; |
1542 | int err; | |
1543 | ||
1544 | init_tnl_info(&info, GENEVE_UDP_PORT); | |
c5ebc440 | 1545 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1546 | &use_udp6_rx_checksums, &ttl_inherit, &df, false); |
5b861f6b GM |
1547 | if (err) |
1548 | return err; | |
abe492b4 | 1549 | |
c40e89fd | 1550 | err = geneve_configure(net, dev, extack, &info, metadata, |
a025fb5f | 1551 | use_udp6_rx_checksums, ttl_inherit, df); |
c40e89fd AK |
1552 | if (err) |
1553 | return err; | |
1554 | ||
1555 | geneve_link_config(dev, &info, tb); | |
1556 | ||
1557 | return 0; | |
2d07dc79 JL |
1558 | } |
1559 | ||
5b861f6b GM |
1560 | /* Quiesces the geneve device data path for both TX and RX. |
1561 | * | |
1562 | * On transmit geneve checks for non-NULL geneve_sock before it proceeds. | |
1563 | * So, if we set that socket to NULL under RCU and wait for synchronize_net() | |
1564 | * to complete for the existing set of in-flight packets to be transmitted, | |
1565 | * then we would have quiesced the transmit data path. All the future packets | |
1566 | * will get dropped until we unquiesce the data path. | |
1567 | * | |
1568 | * On receive geneve dereference the geneve_sock stashed in the socket. So, | |
1569 | * if we set that to NULL under RCU and wait for synchronize_net() to | |
1570 | * complete, then we would have quiesced the receive data path. | |
1571 | */ | |
1572 | static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4, | |
1573 | struct geneve_sock **gs6) | |
1574 | { | |
1575 | *gs4 = rtnl_dereference(geneve->sock4); | |
1576 | rcu_assign_pointer(geneve->sock4, NULL); | |
1577 | if (*gs4) | |
1578 | rcu_assign_sk_user_data((*gs4)->sock->sk, NULL); | |
1579 | #if IS_ENABLED(CONFIG_IPV6) | |
1580 | *gs6 = rtnl_dereference(geneve->sock6); | |
1581 | rcu_assign_pointer(geneve->sock6, NULL); | |
1582 | if (*gs6) | |
1583 | rcu_assign_sk_user_data((*gs6)->sock->sk, NULL); | |
1584 | #else | |
1585 | *gs6 = NULL; | |
1586 | #endif | |
1587 | synchronize_net(); | |
1588 | } | |
1589 | ||
1590 | /* Resumes the geneve device data path for both TX and RX. */ | |
1591 | static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4, | |
1592 | struct geneve_sock __maybe_unused *gs6) | |
1593 | { | |
1594 | rcu_assign_pointer(geneve->sock4, gs4); | |
1595 | if (gs4) | |
1596 | rcu_assign_sk_user_data(gs4->sock->sk, gs4); | |
1597 | #if IS_ENABLED(CONFIG_IPV6) | |
1598 | rcu_assign_pointer(geneve->sock6, gs6); | |
1599 | if (gs6) | |
1600 | rcu_assign_sk_user_data(gs6->sock->sk, gs6); | |
1601 | #endif | |
1602 | synchronize_net(); | |
1603 | } | |
1604 | ||
1605 | static int geneve_changelink(struct net_device *dev, struct nlattr *tb[], | |
1606 | struct nlattr *data[], | |
1607 | struct netlink_ext_ack *extack) | |
1608 | { | |
1609 | struct geneve_dev *geneve = netdev_priv(dev); | |
1610 | struct geneve_sock *gs4, *gs6; | |
1611 | struct ip_tunnel_info info; | |
1612 | bool metadata; | |
1613 | bool use_udp6_rx_checksums; | |
a025fb5f | 1614 | enum ifla_geneve_df df; |
52d0d404 | 1615 | bool ttl_inherit; |
5b861f6b GM |
1616 | int err; |
1617 | ||
1618 | /* If the geneve device is configured for metadata (or externally | |
1619 | * controlled, for example, OVS), then nothing can be changed. | |
1620 | */ | |
1621 | if (geneve->collect_md) | |
1622 | return -EOPNOTSUPP; | |
1623 | ||
1624 | /* Start with the existing info. */ | |
1625 | memcpy(&info, &geneve->info, sizeof(info)); | |
1626 | metadata = geneve->collect_md; | |
1627 | use_udp6_rx_checksums = geneve->use_udp6_rx_checksums; | |
52d0d404 | 1628 | ttl_inherit = geneve->ttl_inherit; |
c5ebc440 | 1629 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1630 | &use_udp6_rx_checksums, &ttl_inherit, &df, true); |
5b861f6b GM |
1631 | if (err) |
1632 | return err; | |
1633 | ||
c40e89fd | 1634 | if (!geneve_dst_addr_equal(&geneve->info, &info)) { |
5b861f6b | 1635 | dst_cache_reset(&info.dst_cache); |
c40e89fd AK |
1636 | geneve_link_config(dev, &info, tb); |
1637 | } | |
5b861f6b GM |
1638 | |
1639 | geneve_quiesce(geneve, &gs4, &gs6); | |
1640 | geneve->info = info; | |
1641 | geneve->collect_md = metadata; | |
1642 | geneve->use_udp6_rx_checksums = use_udp6_rx_checksums; | |
52d0d404 | 1643 | geneve->ttl_inherit = ttl_inherit; |
5b861f6b GM |
1644 | geneve_unquiesce(geneve, gs4, gs6); |
1645 | ||
1646 | return 0; | |
1647 | } | |
1648 | ||
2d07dc79 JL |
1649 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
1650 | { | |
1651 | struct geneve_dev *geneve = netdev_priv(dev); | |
1652 | ||
2d07dc79 JL |
1653 | list_del(&geneve->next); |
1654 | unregister_netdevice_queue(dev, head); | |
1655 | } | |
1656 | ||
1657 | static size_t geneve_get_size(const struct net_device *dev) | |
1658 | { | |
1659 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1660 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1661 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1662 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
a025fb5f | 1663 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */ |
8eb3b995 | 1664 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1665 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1666 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1667 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1668 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1669 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
52d0d404 | 1670 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ |
2d07dc79 JL |
1671 | 0; |
1672 | } | |
1673 | ||
1674 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1675 | { | |
1676 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 1677 | struct ip_tunnel_info *info = &geneve->info; |
52d0d404 | 1678 | bool ttl_inherit = geneve->ttl_inherit; |
fd7eafd0 | 1679 | bool metadata = geneve->collect_md; |
9b4437a5 | 1680 | __u8 tmp_vni[3]; |
2d07dc79 JL |
1681 | __u32 vni; |
1682 | ||
9b4437a5 | 1683 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1684 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1685 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1686 | goto nla_put_failure; | |
1687 | ||
fd7eafd0 | 1688 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1689 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1690 | info->key.u.ipv4.dst)) |
1691 | goto nla_put_failure; | |
9b4437a5 | 1692 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1693 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1694 | goto nla_put_failure; |
9b4437a5 | 1695 | |
8ed66f0e | 1696 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1697 | } else if (!metadata) { |
8ed66f0e | 1698 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, |
9b4437a5 | 1699 | &info->key.u.ipv6.dst)) |
1700 | goto nla_put_failure; | |
9b4437a5 | 1701 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1702 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1703 | goto nla_put_failure; | |
11387fe4 | 1704 | #endif |
fd7eafd0 | 1705 | } |
2d07dc79 | 1706 | |
9b4437a5 | 1707 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1708 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1709 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1710 | goto nla_put_failure; |
1711 | ||
a025fb5f SB |
1712 | if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->df)) |
1713 | goto nla_put_failure; | |
1714 | ||
9b4437a5 | 1715 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1716 | goto nla_put_failure; |
1717 | ||
fd7eafd0 | 1718 | if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
f9094b76 | 1719 | goto nla_put_failure; |
fd7eafd0 | 1720 | |
f9094b76 | 1721 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 HL |
1722 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, |
1723 | !geneve->use_udp6_rx_checksums)) | |
1724 | goto nla_put_failure; | |
f9094b76 | 1725 | #endif |
fd7eafd0 | 1726 | |
52d0d404 HL |
1727 | if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) |
1728 | goto nla_put_failure; | |
1729 | ||
2d07dc79 JL |
1730 | return 0; |
1731 | ||
1732 | nla_put_failure: | |
1733 | return -EMSGSIZE; | |
1734 | } | |
1735 | ||
1736 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1737 | .kind = "geneve", | |
1738 | .maxtype = IFLA_GENEVE_MAX, | |
1739 | .policy = geneve_policy, | |
1740 | .priv_size = sizeof(struct geneve_dev), | |
1741 | .setup = geneve_setup, | |
1742 | .validate = geneve_validate, | |
1743 | .newlink = geneve_newlink, | |
5b861f6b | 1744 | .changelink = geneve_changelink, |
2d07dc79 JL |
1745 | .dellink = geneve_dellink, |
1746 | .get_size = geneve_get_size, | |
1747 | .fill_info = geneve_fill_info, | |
1748 | }; | |
1749 | ||
e305ac6c PS |
1750 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1751 | u8 name_assign_type, u16 dst_port) | |
1752 | { | |
1753 | struct nlattr *tb[IFLA_MAX + 1]; | |
9b4437a5 | 1754 | struct ip_tunnel_info info; |
e305ac6c | 1755 | struct net_device *dev; |
106da663 | 1756 | LIST_HEAD(list_kill); |
e305ac6c PS |
1757 | int err; |
1758 | ||
1759 | memset(tb, 0, sizeof(tb)); | |
1760 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 1761 | &geneve_link_ops, tb, NULL); |
e305ac6c PS |
1762 | if (IS_ERR(dev)) |
1763 | return dev; | |
1764 | ||
9b4437a5 | 1765 | init_tnl_info(&info, dst_port); |
a025fb5f SB |
1766 | err = geneve_configure(net, dev, NULL, &info, |
1767 | true, true, false, GENEVE_DF_UNSET); | |
106da663 ND |
1768 | if (err) { |
1769 | free_netdev(dev); | |
1770 | return ERR_PTR(err); | |
1771 | } | |
7e059158 DW |
1772 | |
1773 | /* openvswitch users expect packet sizes to be unrestricted, | |
1774 | * so set the largest MTU we can. | |
1775 | */ | |
91572088 | 1776 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1777 | if (err) |
1778 | goto err; | |
1779 | ||
41009481 ND |
1780 | err = rtnl_configure_link(dev, NULL); |
1781 | if (err < 0) | |
1782 | goto err; | |
1783 | ||
e305ac6c | 1784 | return dev; |
9b4437a5 | 1785 | err: |
106da663 ND |
1786 | geneve_dellink(dev, &list_kill); |
1787 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1788 | return ERR_PTR(err); |
e305ac6c PS |
1789 | } |
1790 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1791 | ||
681e683f HFS |
1792 | static int geneve_netdevice_event(struct notifier_block *unused, |
1793 | unsigned long event, void *ptr) | |
1794 | { | |
1795 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1796 | ||
2d2b13fc | 1797 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || |
04584957 | 1798 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { |
2d2b13fc | 1799 | geneve_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 SD |
1800 | } else if (event == NETDEV_UNREGISTER) { |
1801 | geneve_offload_rx_ports(dev, false); | |
1802 | } else if (event == NETDEV_REGISTER) { | |
1803 | geneve_offload_rx_ports(dev, true); | |
1804 | } | |
681e683f HFS |
1805 | |
1806 | return NOTIFY_DONE; | |
1807 | } | |
1808 | ||
1809 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1810 | .notifier_call = geneve_netdevice_event, | |
1811 | }; | |
1812 | ||
2d07dc79 JL |
1813 | static __net_init int geneve_init_net(struct net *net) |
1814 | { | |
1815 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1816 | |
1817 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1818 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1819 | return 0; |
1820 | } | |
1821 | ||
2843a253 | 1822 | static void geneve_destroy_tunnels(struct net *net, struct list_head *head) |
2d07dc79 JL |
1823 | { |
1824 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1825 | struct geneve_dev *geneve, *next; | |
1826 | struct net_device *dev, *aux; | |
2d07dc79 JL |
1827 | |
1828 | /* gather any geneve devices that were moved into this ns */ | |
1829 | for_each_netdev_safe(net, dev, aux) | |
1830 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
2843a253 | 1831 | unregister_netdevice_queue(dev, head); |
2d07dc79 JL |
1832 | |
1833 | /* now gather any other geneve devices that were created in this ns */ | |
1834 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1835 | /* If geneve->dev is in the same netns, it was already added | |
1836 | * to the list by the previous loop. | |
1837 | */ | |
1838 | if (!net_eq(dev_net(geneve->dev), net)) | |
2843a253 | 1839 | unregister_netdevice_queue(geneve->dev, head); |
2d07dc79 JL |
1840 | } |
1841 | ||
2843a253 HY |
1842 | WARN_ON_ONCE(!list_empty(&gn->sock_list)); |
1843 | } | |
1844 | ||
1845 | static void __net_exit geneve_exit_batch_net(struct list_head *net_list) | |
1846 | { | |
1847 | struct net *net; | |
1848 | LIST_HEAD(list); | |
1849 | ||
1850 | rtnl_lock(); | |
1851 | list_for_each_entry(net, net_list, exit_list) | |
1852 | geneve_destroy_tunnels(net, &list); | |
1853 | ||
2d07dc79 JL |
1854 | /* unregister the devices gathered above */ |
1855 | unregister_netdevice_many(&list); | |
1856 | rtnl_unlock(); | |
1857 | } | |
1858 | ||
1859 | static struct pernet_operations geneve_net_ops = { | |
1860 | .init = geneve_init_net, | |
2843a253 | 1861 | .exit_batch = geneve_exit_batch_net, |
2d07dc79 JL |
1862 | .id = &geneve_net_id, |
1863 | .size = sizeof(struct geneve_net), | |
1864 | }; | |
1865 | ||
1866 | static int __init geneve_init_module(void) | |
1867 | { | |
1868 | int rc; | |
1869 | ||
1870 | rc = register_pernet_subsys(&geneve_net_ops); | |
1871 | if (rc) | |
1872 | goto out1; | |
1873 | ||
681e683f | 1874 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1875 | if (rc) |
1876 | goto out2; | |
1877 | ||
681e683f HFS |
1878 | rc = rtnl_link_register(&geneve_link_ops); |
1879 | if (rc) | |
1880 | goto out3; | |
1881 | ||
2d07dc79 | 1882 | return 0; |
681e683f HFS |
1883 | out3: |
1884 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1885 | out2: |
1886 | unregister_pernet_subsys(&geneve_net_ops); | |
1887 | out1: | |
1888 | return rc; | |
1889 | } | |
1890 | late_initcall(geneve_init_module); | |
1891 | ||
1892 | static void __exit geneve_cleanup_module(void) | |
1893 | { | |
1894 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1895 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1896 | unregister_pernet_subsys(&geneve_net_ops); |
1897 | } | |
1898 | module_exit(geneve_cleanup_module); | |
1899 | ||
1900 | MODULE_LICENSE("GPL"); | |
1901 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1902 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1903 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1904 | MODULE_ALIAS_RTNL_LINK("geneve"); |