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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> | |
3616d08b | 17 | #include <net/ipv6_stubs.h> |
e305ac6c | 18 | #include <net/dst_metadata.h> |
8e816df8 | 19 | #include <net/gro_cells.h> |
2d07dc79 JL |
20 | #include <net/rtnetlink.h> |
21 | #include <net/geneve.h> | |
371bd106 | 22 | #include <net/protocol.h> |
2d07dc79 JL |
23 | |
24 | #define GENEVE_NETDEV_VER "0.6" | |
25 | ||
2d07dc79 JL |
26 | #define GENEVE_N_VID (1u << 24) |
27 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
28 | ||
29 | #define VNI_HASH_BITS 10 | |
30 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
31 | ||
32 | static bool log_ecn_error = true; | |
33 | module_param(log_ecn_error, bool, 0644); | |
34 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
35 | ||
371bd106 PS |
36 | #define GENEVE_VER 0 |
37 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
5edbea69 AK |
38 | #define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN) |
39 | #define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN) | |
371bd106 | 40 | |
2d07dc79 JL |
41 | /* per-network namespace private data for this module */ |
42 | struct geneve_net { | |
371bd106 | 43 | struct list_head geneve_list; |
371bd106 | 44 | struct list_head sock_list; |
2d07dc79 JL |
45 | }; |
46 | ||
c7d03a00 | 47 | static unsigned int geneve_net_id; |
371bd106 | 48 | |
4b4c21fa JB |
49 | struct geneve_dev_node { |
50 | struct hlist_node hlist; | |
51 | struct geneve_dev *geneve; | |
52 | }; | |
53 | ||
2d07dc79 JL |
54 | /* Pseudo network device */ |
55 | struct geneve_dev { | |
4b4c21fa JB |
56 | struct geneve_dev_node hlist4; /* vni hash table for IPv4 socket */ |
57 | #if IS_ENABLED(CONFIG_IPV6) | |
58 | struct geneve_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
59 | #endif | |
2d07dc79 JL |
60 | struct net *net; /* netns for packet i/o */ |
61 | struct net_device *dev; /* netdev for geneve tunnel */ | |
9b4437a5 | 62 | struct ip_tunnel_info info; |
fceb9c3e | 63 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 64 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 65 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 66 | #endif |
2d07dc79 | 67 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 68 | struct gro_cells gro_cells; |
9b4437a5 | 69 | bool collect_md; |
70 | bool use_udp6_rx_checksums; | |
52d0d404 | 71 | bool ttl_inherit; |
a025fb5f | 72 | enum ifla_geneve_df df; |
2d07dc79 JL |
73 | }; |
74 | ||
371bd106 PS |
75 | struct geneve_sock { |
76 | bool collect_md; | |
371bd106 PS |
77 | struct list_head list; |
78 | struct socket *sock; | |
79 | struct rcu_head rcu; | |
80 | int refcnt; | |
66d47003 | 81 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 82 | }; |
2d07dc79 JL |
83 | |
84 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
85 | { | |
86 | __u32 vnid; | |
87 | ||
88 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
89 | return hash_32(vnid, VNI_HASH_BITS); | |
90 | } | |
91 | ||
e305ac6c PS |
92 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
93 | { | |
94 | #ifdef __BIG_ENDIAN | |
95 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
96 | #else | |
97 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
98 | ((__force u64)vni[1] << 48) | | |
99 | ((__force u64)vni[2] << 56)); | |
100 | #endif | |
101 | } | |
102 | ||
9b4437a5 | 103 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
104 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
105 | { | |
106 | #ifdef __BIG_ENDIAN | |
107 | vni[0] = (__force __u8)(tun_id >> 16); | |
108 | vni[1] = (__force __u8)(tun_id >> 8); | |
109 | vni[2] = (__force __u8)tun_id; | |
110 | #else | |
111 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
112 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
113 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
114 | #endif | |
115 | } | |
116 | ||
2e0b26e1 | 117 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
118 | { | |
2e0b26e1 | 119 | return !memcmp(vni, &tun_id[5], 3); |
2e0b26e1 | 120 | } |
121 | ||
1e9f12ec JB |
122 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
123 | { | |
124 | return gs->sock->sk->sk_family; | |
125 | } | |
126 | ||
66d47003 | 127 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 128 | __be32 addr, u8 vni[]) |
2d07dc79 | 129 | { |
2d07dc79 | 130 | struct hlist_head *vni_list_head; |
4b4c21fa | 131 | struct geneve_dev_node *node; |
2d07dc79 JL |
132 | __u32 hash; |
133 | ||
2d07dc79 | 134 | /* Find the device for this VNI */ |
371bd106 | 135 | hash = geneve_net_vni_hash(vni); |
66d47003 | 136 | vni_list_head = &gs->vni_list[hash]; |
4b4c21fa JB |
137 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
138 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
139 | addr == node->geneve->info.key.u.ipv4.dst) | |
140 | return node->geneve; | |
8ed66f0e JL |
141 | } |
142 | return NULL; | |
143 | } | |
144 | ||
145 | #if IS_ENABLED(CONFIG_IPV6) | |
146 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
147 | struct in6_addr addr6, u8 vni[]) | |
148 | { | |
149 | struct hlist_head *vni_list_head; | |
4b4c21fa | 150 | struct geneve_dev_node *node; |
8ed66f0e JL |
151 | __u32 hash; |
152 | ||
153 | /* Find the device for this VNI */ | |
154 | hash = geneve_net_vni_hash(vni); | |
155 | vni_list_head = &gs->vni_list[hash]; | |
4b4c21fa JB |
156 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
157 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
158 | ipv6_addr_equal(&addr6, &node->geneve->info.key.u.ipv6.dst)) | |
159 | return node->geneve; | |
2d07dc79 | 160 | } |
e305ac6c PS |
161 | return NULL; |
162 | } | |
8ed66f0e | 163 | #endif |
e305ac6c | 164 | |
371bd106 PS |
165 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
166 | { | |
167 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
168 | } | |
169 | ||
9fc47545 JB |
170 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
171 | struct sk_buff *skb) | |
e305ac6c | 172 | { |
8ed66f0e | 173 | static u8 zero_vni[3]; |
9b4437a5 | 174 | u8 *vni; |
e305ac6c | 175 | |
1e9f12ec | 176 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 177 | struct iphdr *iph; |
9b4437a5 | 178 | __be32 addr; |
9fc47545 | 179 | |
8ed66f0e | 180 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 181 | |
8ed66f0e JL |
182 | if (gs->collect_md) { |
183 | vni = zero_vni; | |
184 | addr = 0; | |
185 | } else { | |
9fc47545 | 186 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
187 | addr = iph->saddr; |
188 | } | |
189 | ||
9fc47545 | 190 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 191 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 192 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 193 | static struct in6_addr zero_addr6; |
9fc47545 JB |
194 | struct ipv6hdr *ip6h; |
195 | struct in6_addr addr6; | |
196 | ||
8ed66f0e | 197 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 198 | |
8ed66f0e JL |
199 | if (gs->collect_md) { |
200 | vni = zero_vni; | |
201 | addr6 = zero_addr6; | |
202 | } else { | |
9fc47545 | 203 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
204 | addr6 = ip6h->saddr; |
205 | } | |
206 | ||
9fc47545 | 207 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
208 | #endif |
209 | } | |
9fc47545 JB |
210 | return NULL; |
211 | } | |
212 | ||
213 | /* geneve receive/decap routine */ | |
214 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
215 | struct sk_buff *skb) | |
216 | { | |
217 | struct genevehdr *gnvh = geneve_hdr(skb); | |
218 | struct metadata_dst *tun_dst = NULL; | |
219 | struct pcpu_sw_netstats *stats; | |
fe741e23 | 220 | unsigned int len; |
9fc47545 JB |
221 | int err = 0; |
222 | void *oiph; | |
2d07dc79 | 223 | |
371bd106 | 224 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 225 | __be16 flags; |
e305ac6c PS |
226 | |
227 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
228 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
229 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
230 | ||
1e9f12ec | 231 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
232 | vni_to_tunnel_id(gnvh->vni), |
233 | gnvh->opt_len * 4); | |
fe741e23 GM |
234 | if (!tun_dst) { |
235 | geneve->dev->stats.rx_dropped++; | |
e305ac6c | 236 | goto drop; |
fe741e23 | 237 | } |
e305ac6c | 238 | /* Update tunnel dst according to Geneve options. */ |
4c222798 | 239 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
256c87c1 PJV |
240 | gnvh->options, gnvh->opt_len * 4, |
241 | TUNNEL_GENEVE_OPT); | |
e305ac6c PS |
242 | } else { |
243 | /* Drop packets w/ critical options, | |
244 | * since we don't support any... | |
245 | */ | |
fe741e23 GM |
246 | if (gnvh->critical) { |
247 | geneve->dev->stats.rx_frame_errors++; | |
248 | geneve->dev->stats.rx_errors++; | |
e305ac6c | 249 | goto drop; |
fe741e23 | 250 | } |
e305ac6c | 251 | } |
2d07dc79 JL |
252 | |
253 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
254 | skb->protocol = eth_type_trans(skb, geneve->dev); |
255 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
256 | ||
e305ac6c PS |
257 | if (tun_dst) |
258 | skb_dst_set(skb, &tun_dst->dst); | |
259 | ||
2d07dc79 | 260 | /* Ignore packet loops (and multicast echo) */ |
fe741e23 GM |
261 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) { |
262 | geneve->dev->stats.rx_errors++; | |
2d07dc79 | 263 | goto drop; |
fe741e23 | 264 | } |
2d07dc79 | 265 | |
9fc47545 | 266 | oiph = skb_network_header(skb); |
2d07dc79 JL |
267 | skb_reset_network_header(skb); |
268 | ||
9fc47545 JB |
269 | if (geneve_get_sk_family(gs) == AF_INET) |
270 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 271 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
272 | else |
273 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 274 | #endif |
2d07dc79 JL |
275 | |
276 | if (unlikely(err)) { | |
8ed66f0e | 277 | if (log_ecn_error) { |
9fc47545 | 278 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
279 | net_info_ratelimited("non-ECT from %pI4 " |
280 | "with TOS=%#x\n", | |
9fc47545 JB |
281 | &((struct iphdr *)oiph)->saddr, |
282 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 283 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 284 | else |
8ed66f0e | 285 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 286 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
287 | #endif |
288 | } | |
2d07dc79 JL |
289 | if (err > 1) { |
290 | ++geneve->dev->stats.rx_frame_errors; | |
291 | ++geneve->dev->stats.rx_errors; | |
292 | goto drop; | |
293 | } | |
294 | } | |
295 | ||
fe741e23 GM |
296 | len = skb->len; |
297 | err = gro_cells_receive(&geneve->gro_cells, skb); | |
298 | if (likely(err == NET_RX_SUCCESS)) { | |
299 | stats = this_cpu_ptr(geneve->dev->tstats); | |
300 | u64_stats_update_begin(&stats->syncp); | |
301 | stats->rx_packets++; | |
302 | stats->rx_bytes += len; | |
303 | u64_stats_update_end(&stats->syncp); | |
304 | } | |
2d07dc79 JL |
305 | return; |
306 | drop: | |
307 | /* Consume bad packet */ | |
308 | kfree_skb(skb); | |
309 | } | |
310 | ||
311 | /* Setup stats when device is created */ | |
312 | static int geneve_init(struct net_device *dev) | |
313 | { | |
8e816df8 JG |
314 | struct geneve_dev *geneve = netdev_priv(dev); |
315 | int err; | |
316 | ||
2d07dc79 JL |
317 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
318 | if (!dev->tstats) | |
319 | return -ENOMEM; | |
8e816df8 JG |
320 | |
321 | err = gro_cells_init(&geneve->gro_cells, dev); | |
322 | if (err) { | |
323 | free_percpu(dev->tstats); | |
324 | return err; | |
325 | } | |
326 | ||
9b4437a5 | 327 | err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL); |
468dfffc PA |
328 | if (err) { |
329 | free_percpu(dev->tstats); | |
330 | gro_cells_destroy(&geneve->gro_cells); | |
331 | return err; | |
332 | } | |
2d07dc79 JL |
333 | return 0; |
334 | } | |
335 | ||
336 | static void geneve_uninit(struct net_device *dev) | |
337 | { | |
8e816df8 JG |
338 | struct geneve_dev *geneve = netdev_priv(dev); |
339 | ||
9b4437a5 | 340 | dst_cache_destroy(&geneve->info.dst_cache); |
8e816df8 | 341 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
342 | free_percpu(dev->tstats); |
343 | } | |
344 | ||
371bd106 PS |
345 | /* Callback from net/ipv4/udp.c to receive packets */ |
346 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
347 | { | |
348 | struct genevehdr *geneveh; | |
9fc47545 | 349 | struct geneve_dev *geneve; |
371bd106 PS |
350 | struct geneve_sock *gs; |
351 | int opts_len; | |
352 | ||
fe741e23 | 353 | /* Need UDP and Geneve header to be present */ |
371bd106 | 354 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) |
e5aed006 | 355 | goto drop; |
371bd106 PS |
356 | |
357 | /* Return packets with reserved bits set */ | |
358 | geneveh = geneve_hdr(skb); | |
359 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 360 | goto drop; |
371bd106 PS |
361 | |
362 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 363 | goto drop; |
371bd106 | 364 | |
9fc47545 JB |
365 | gs = rcu_dereference_sk_user_data(sk); |
366 | if (!gs) | |
367 | goto drop; | |
368 | ||
369 | geneve = geneve_lookup_skb(gs, skb); | |
370 | if (!geneve) | |
371 | goto drop; | |
372 | ||
371bd106 PS |
373 | opts_len = geneveh->opt_len * 4; |
374 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 | 375 | htons(ETH_P_TEB), |
fe741e23 GM |
376 | !net_eq(geneve->net, dev_net(geneve->dev)))) { |
377 | geneve->dev->stats.rx_dropped++; | |
371bd106 | 378 | goto drop; |
fe741e23 | 379 | } |
371bd106 | 380 | |
9fc47545 | 381 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
382 | return 0; |
383 | ||
384 | drop: | |
385 | /* Consume bad packet */ | |
386 | kfree_skb(skb); | |
387 | return 0; | |
371bd106 PS |
388 | } |
389 | ||
a0796644 SB |
390 | /* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */ |
391 | static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb) | |
392 | { | |
393 | struct genevehdr *geneveh; | |
394 | struct geneve_sock *gs; | |
395 | u8 zero_vni[3] = { 0 }; | |
396 | u8 *vni = zero_vni; | |
397 | ||
398 | if (skb->len < GENEVE_BASE_HLEN) | |
399 | return -EINVAL; | |
400 | ||
401 | geneveh = geneve_hdr(skb); | |
402 | if (geneveh->ver != GENEVE_VER) | |
403 | return -EINVAL; | |
404 | ||
405 | if (geneveh->proto_type != htons(ETH_P_TEB)) | |
406 | return -EINVAL; | |
407 | ||
408 | gs = rcu_dereference_sk_user_data(sk); | |
409 | if (!gs) | |
410 | return -ENOENT; | |
411 | ||
412 | if (geneve_get_sk_family(gs) == AF_INET) { | |
413 | struct iphdr *iph = ip_hdr(skb); | |
414 | __be32 addr4 = 0; | |
415 | ||
416 | if (!gs->collect_md) { | |
417 | vni = geneve_hdr(skb)->vni; | |
418 | addr4 = iph->daddr; | |
419 | } | |
420 | ||
421 | return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT; | |
422 | } | |
423 | ||
424 | #if IS_ENABLED(CONFIG_IPV6) | |
425 | if (geneve_get_sk_family(gs) == AF_INET6) { | |
426 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
8a962c4a NC |
427 | struct in6_addr addr6; |
428 | ||
429 | memset(&addr6, 0, sizeof(struct in6_addr)); | |
a0796644 SB |
430 | |
431 | if (!gs->collect_md) { | |
432 | vni = geneve_hdr(skb)->vni; | |
433 | addr6 = ip6h->daddr; | |
434 | } | |
435 | ||
436 | return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT; | |
437 | } | |
438 | #endif | |
439 | ||
440 | return -EPFNOSUPPORT; | |
441 | } | |
442 | ||
371bd106 | 443 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, |
9b4437a5 | 444 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
445 | { |
446 | struct socket *sock; | |
447 | struct udp_port_cfg udp_conf; | |
448 | int err; | |
449 | ||
450 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
451 | ||
452 | if (ipv6) { | |
453 | udp_conf.family = AF_INET6; | |
8ed66f0e | 454 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 455 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
456 | } else { |
457 | udp_conf.family = AF_INET; | |
458 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
459 | } | |
460 | ||
461 | udp_conf.local_udp_port = port; | |
462 | ||
463 | /* Open UDP socket */ | |
464 | err = udp_sock_create(net, &udp_conf, &sock); | |
465 | if (err < 0) | |
466 | return ERR_PTR(err); | |
467 | ||
468 | return sock; | |
469 | } | |
470 | ||
371bd106 PS |
471 | static int geneve_hlen(struct genevehdr *gh) |
472 | { | |
473 | return sizeof(*gh) + gh->opt_len * 4; | |
474 | } | |
475 | ||
d4546c25 DM |
476 | static struct sk_buff *geneve_gro_receive(struct sock *sk, |
477 | struct list_head *head, | |
478 | struct sk_buff *skb) | |
371bd106 | 479 | { |
d4546c25 DM |
480 | struct sk_buff *pp = NULL; |
481 | struct sk_buff *p; | |
371bd106 PS |
482 | struct genevehdr *gh, *gh2; |
483 | unsigned int hlen, gh_len, off_gnv; | |
484 | const struct packet_offload *ptype; | |
485 | __be16 type; | |
486 | int flush = 1; | |
487 | ||
488 | off_gnv = skb_gro_offset(skb); | |
489 | hlen = off_gnv + sizeof(*gh); | |
490 | gh = skb_gro_header_fast(skb, off_gnv); | |
491 | if (skb_gro_header_hard(skb, hlen)) { | |
492 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
493 | if (unlikely(!gh)) | |
494 | goto out; | |
495 | } | |
496 | ||
497 | if (gh->ver != GENEVE_VER || gh->oam) | |
498 | goto out; | |
499 | gh_len = geneve_hlen(gh); | |
500 | ||
501 | hlen = off_gnv + gh_len; | |
502 | if (skb_gro_header_hard(skb, hlen)) { | |
503 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
504 | if (unlikely(!gh)) | |
505 | goto out; | |
506 | } | |
507 | ||
d4546c25 | 508 | list_for_each_entry(p, head, list) { |
371bd106 PS |
509 | if (!NAPI_GRO_CB(p)->same_flow) |
510 | continue; | |
511 | ||
512 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
513 | if (gh->opt_len != gh2->opt_len || | |
514 | memcmp(gh, gh2, gh_len)) { | |
515 | NAPI_GRO_CB(p)->same_flow = 0; | |
516 | continue; | |
517 | } | |
518 | } | |
519 | ||
520 | type = gh->proto_type; | |
521 | ||
522 | rcu_read_lock(); | |
523 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 524 | if (!ptype) |
371bd106 | 525 | goto out_unlock; |
371bd106 PS |
526 | |
527 | skb_gro_pull(skb, gh_len); | |
528 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 529 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 530 | flush = 0; |
371bd106 PS |
531 | |
532 | out_unlock: | |
533 | rcu_read_unlock(); | |
534 | out: | |
603d4cf8 | 535 | skb_gro_flush_final(skb, pp, flush); |
371bd106 PS |
536 | |
537 | return pp; | |
538 | } | |
539 | ||
4a0090a9 TH |
540 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
541 | int nhoff) | |
371bd106 PS |
542 | { |
543 | struct genevehdr *gh; | |
544 | struct packet_offload *ptype; | |
545 | __be16 type; | |
546 | int gh_len; | |
547 | int err = -ENOSYS; | |
548 | ||
371bd106 PS |
549 | gh = (struct genevehdr *)(skb->data + nhoff); |
550 | gh_len = geneve_hlen(gh); | |
551 | type = gh->proto_type; | |
552 | ||
553 | rcu_read_lock(); | |
554 | ptype = gro_find_complete_by_type(type); | |
555 | if (ptype) | |
556 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
557 | ||
558 | rcu_read_unlock(); | |
229740c6 JR |
559 | |
560 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
561 | ||
371bd106 PS |
562 | return err; |
563 | } | |
564 | ||
565 | /* Create new listen socket if needed */ | |
566 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 567 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
568 | { |
569 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
570 | struct geneve_sock *gs; | |
571 | struct socket *sock; | |
572 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 573 | int h; |
371bd106 PS |
574 | |
575 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
576 | if (!gs) | |
577 | return ERR_PTR(-ENOMEM); | |
578 | ||
9b4437a5 | 579 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
580 | if (IS_ERR(sock)) { |
581 | kfree(gs); | |
582 | return ERR_CAST(sock); | |
583 | } | |
584 | ||
585 | gs->sock = sock; | |
586 | gs->refcnt = 1; | |
66d47003 PS |
587 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
588 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
589 | |
590 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 591 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
592 | |
593 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 594 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
595 | tunnel_cfg.sk_user_data = gs; |
596 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
597 | tunnel_cfg.gro_receive = geneve_gro_receive; |
598 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 | 599 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
a0796644 | 600 | tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup; |
371bd106 PS |
601 | tunnel_cfg.encap_destroy = NULL; |
602 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
603 | list_add(&gs->list, &gn->sock_list); |
604 | return gs; | |
605 | } | |
606 | ||
8ed66f0e | 607 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 608 | { |
8ed66f0e | 609 | if (!gs || --gs->refcnt) |
371bd106 PS |
610 | return; |
611 | ||
612 | list_del(&gs->list); | |
e7b3db5e | 613 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
614 | udp_tunnel_sock_release(gs->sock); |
615 | kfree_rcu(gs, rcu); | |
616 | } | |
617 | ||
8ed66f0e JL |
618 | static void geneve_sock_release(struct geneve_dev *geneve) |
619 | { | |
fceb9c3e | 620 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 621 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 622 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
623 | ||
624 | rcu_assign_pointer(geneve->sock6, NULL); | |
625 | #endif | |
626 | ||
627 | rcu_assign_pointer(geneve->sock4, NULL); | |
628 | synchronize_net(); | |
629 | ||
630 | __geneve_sock_release(gs4); | |
631 | #if IS_ENABLED(CONFIG_IPV6) | |
632 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
633 | #endif |
634 | } | |
635 | ||
371bd106 | 636 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 637 | sa_family_t family, |
371bd106 PS |
638 | __be16 dst_port) |
639 | { | |
640 | struct geneve_sock *gs; | |
641 | ||
642 | list_for_each_entry(gs, &gn->sock_list, list) { | |
643 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 644 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
645 | return gs; |
646 | } | |
647 | } | |
648 | return NULL; | |
649 | } | |
650 | ||
8ed66f0e | 651 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 652 | { |
2d07dc79 | 653 | struct net *net = geneve->net; |
371bd106 | 654 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
4b4c21fa | 655 | struct geneve_dev_node *node; |
2d07dc79 | 656 | struct geneve_sock *gs; |
9b4437a5 | 657 | __u8 vni[3]; |
66d47003 | 658 | __u32 hash; |
2d07dc79 | 659 | |
9b4437a5 | 660 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst); |
371bd106 PS |
661 | if (gs) { |
662 | gs->refcnt++; | |
663 | goto out; | |
664 | } | |
665 | ||
9b4437a5 | 666 | gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6, |
667 | geneve->use_udp6_rx_checksums); | |
2d07dc79 JL |
668 | if (IS_ERR(gs)) |
669 | return PTR_ERR(gs); | |
670 | ||
371bd106 PS |
671 | out: |
672 | gs->collect_md = geneve->collect_md; | |
8ed66f0e | 673 | #if IS_ENABLED(CONFIG_IPV6) |
4b4c21fa | 674 | if (ipv6) { |
fceb9c3e | 675 | rcu_assign_pointer(geneve->sock6, gs); |
4b4c21fa JB |
676 | node = &geneve->hlist6; |
677 | } else | |
8ed66f0e | 678 | #endif |
4b4c21fa | 679 | { |
fceb9c3e | 680 | rcu_assign_pointer(geneve->sock4, gs); |
4b4c21fa JB |
681 | node = &geneve->hlist4; |
682 | } | |
683 | node->geneve = geneve; | |
66d47003 | 684 | |
9b4437a5 | 685 | tunnel_id_to_vni(geneve->info.key.tun_id, vni); |
686 | hash = geneve_net_vni_hash(vni); | |
4b4c21fa | 687 | hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
688 | return 0; |
689 | } | |
690 | ||
8ed66f0e JL |
691 | static int geneve_open(struct net_device *dev) |
692 | { | |
693 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 694 | bool metadata = geneve->collect_md; |
cf1c9ccb | 695 | bool ipv4, ipv6; |
8ed66f0e JL |
696 | int ret = 0; |
697 | ||
cf1c9ccb JB |
698 | ipv6 = geneve->info.mode & IP_TUNNEL_INFO_IPV6 || metadata; |
699 | ipv4 = !ipv6 || metadata; | |
8ed66f0e | 700 | #if IS_ENABLED(CONFIG_IPV6) |
cf1c9ccb | 701 | if (ipv6) { |
8ed66f0e | 702 | ret = geneve_sock_add(geneve, true); |
cf1c9ccb JB |
703 | if (ret < 0 && ret != -EAFNOSUPPORT) |
704 | ipv4 = false; | |
705 | } | |
8ed66f0e | 706 | #endif |
cf1c9ccb | 707 | if (ipv4) |
8ed66f0e JL |
708 | ret = geneve_sock_add(geneve, false); |
709 | if (ret < 0) | |
710 | geneve_sock_release(geneve); | |
711 | ||
712 | return ret; | |
713 | } | |
714 | ||
2d07dc79 JL |
715 | static int geneve_stop(struct net_device *dev) |
716 | { | |
717 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 718 | |
4b4c21fa JB |
719 | hlist_del_init_rcu(&geneve->hlist4.hlist); |
720 | #if IS_ENABLED(CONFIG_IPV6) | |
721 | hlist_del_init_rcu(&geneve->hlist6.hlist); | |
722 | #endif | |
8ed66f0e | 723 | geneve_sock_release(geneve); |
371bd106 PS |
724 | return 0; |
725 | } | |
726 | ||
8ed66f0e | 727 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 728 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
729 | { |
730 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 731 | geneveh->opt_len = info->options_len / 4; |
732 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
733 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 734 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 735 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
736 | geneveh->proto_type = htons(ETH_P_TEB); |
737 | geneveh->rsvd2 = 0; | |
738 | ||
256c87c1 PJV |
739 | if (info->key.tun_flags & TUNNEL_GENEVE_OPT) |
740 | ip_tunnel_info_opts_get(geneveh->options, info); | |
8ed66f0e JL |
741 | } |
742 | ||
c3ef5aa5 | 743 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
744 | const struct ip_tunnel_info *info, | |
745 | bool xnet, int ip_hdr_len) | |
371bd106 | 746 | { |
c3ef5aa5 | 747 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
748 | struct genevehdr *gnvh; |
749 | int min_headroom; | |
750 | int err; | |
751 | ||
c3ef5aa5 | 752 | skb_reset_mac_header(skb); |
8ed66f0e JL |
753 | skb_scrub_packet(skb, xnet); |
754 | ||
c3ef5aa5 | 755 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
756 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 757 | err = skb_cow_head(skb, min_headroom); |
aed069df | 758 | if (unlikely(err)) |
8ed66f0e | 759 | goto free_dst; |
8ed66f0e | 760 | |
aed069df | 761 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 762 | if (err) |
8ed66f0e | 763 | goto free_dst; |
8ed66f0e | 764 | |
d58ff351 | 765 | gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len); |
c3ef5aa5 | 766 | geneve_build_header(gnvh, info); |
8ed66f0e JL |
767 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
768 | return 0; | |
769 | ||
770 | free_dst: | |
771 | dst_release(dst); | |
772 | return err; | |
773 | } | |
8ed66f0e JL |
774 | |
775 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
776 | struct net_device *dev, | |
5b861f6b | 777 | struct geneve_sock *gs4, |
8ed66f0e | 778 | struct flowi4 *fl4, |
c3ef5aa5 | 779 | const struct ip_tunnel_info *info) |
e305ac6c | 780 | { |
db3c6139 | 781 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 782 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 783 | struct dst_cache *dst_cache; |
e305ac6c PS |
784 | struct rtable *rt = NULL; |
785 | __u8 tos; | |
786 | ||
5b861f6b | 787 | if (!gs4) |
fceb9c3e | 788 | return ERR_PTR(-EIO); |
789 | ||
e305ac6c PS |
790 | memset(fl4, 0, sizeof(*fl4)); |
791 | fl4->flowi4_mark = skb->mark; | |
792 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 793 | fl4->daddr = info->key.u.ipv4.dst; |
794 | fl4->saddr = info->key.u.ipv4.src; | |
e305ac6c | 795 | |
9b4437a5 | 796 | tos = info->key.tos; |
797 | if ((tos == 1) && !geneve->collect_md) { | |
798 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
799 | use_cache = false; | |
468dfffc | 800 | } |
9b4437a5 | 801 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 802 | |
c3ef5aa5 | 803 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
804 | if (use_cache) { |
805 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
806 | if (rt) | |
807 | return rt; | |
e305ac6c | 808 | } |
e305ac6c PS |
809 | rt = ip_route_output_key(geneve->net, fl4); |
810 | if (IS_ERR(rt)) { | |
811 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 812 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
813 | } |
814 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
815 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 816 | ip_rt_put(rt); |
fc4099f1 | 817 | return ERR_PTR(-ELOOP); |
e305ac6c | 818 | } |
468dfffc PA |
819 | if (use_cache) |
820 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
821 | return rt; |
822 | } | |
823 | ||
8ed66f0e JL |
824 | #if IS_ENABLED(CONFIG_IPV6) |
825 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
826 | struct net_device *dev, | |
5b861f6b | 827 | struct geneve_sock *gs6, |
8ed66f0e | 828 | struct flowi6 *fl6, |
c3ef5aa5 | 829 | const struct ip_tunnel_info *info) |
8ed66f0e | 830 | { |
db3c6139 | 831 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 832 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 833 | struct dst_entry *dst = NULL; |
468dfffc | 834 | struct dst_cache *dst_cache; |
3a56f86f | 835 | __u8 prio; |
8ed66f0e | 836 | |
fceb9c3e | 837 | if (!gs6) |
838 | return ERR_PTR(-EIO); | |
839 | ||
8ed66f0e JL |
840 | memset(fl6, 0, sizeof(*fl6)); |
841 | fl6->flowi6_mark = skb->mark; | |
842 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 843 | fl6->daddr = info->key.u.ipv6.dst; |
844 | fl6->saddr = info->key.u.ipv6.src; | |
845 | prio = info->key.tos; | |
846 | if ((prio == 1) && !geneve->collect_md) { | |
847 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
848 | use_cache = false; | |
468dfffc PA |
849 | } |
850 | ||
9b4437a5 | 851 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
852 | info->key.label); | |
c3ef5aa5 | 853 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
854 | if (use_cache) { |
855 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
856 | if (dst) | |
857 | return dst; | |
8ed66f0e | 858 | } |
8ed66f0e JL |
859 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { |
860 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
861 | return ERR_PTR(-ENETUNREACH); | |
862 | } | |
863 | if (dst->dev == dev) { /* is this necessary? */ | |
864 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
865 | dst_release(dst); | |
866 | return ERR_PTR(-ELOOP); | |
867 | } | |
868 | ||
468dfffc PA |
869 | if (use_cache) |
870 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
871 | return dst; |
872 | } | |
873 | #endif | |
874 | ||
9b4437a5 | 875 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 876 | struct geneve_dev *geneve, |
877 | const struct ip_tunnel_info *info) | |
2d07dc79 | 878 | { |
9b4437a5 | 879 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
880 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
881 | const struct ip_tunnel_key *key = &info->key; | |
882 | struct rtable *rt; | |
2d07dc79 | 883 | struct flowi4 fl4; |
8760ce58 | 884 | __u8 tos, ttl; |
a025fb5f | 885 | __be16 df = 0; |
e305ac6c | 886 | __be16 sport; |
bcceeec3 | 887 | int err; |
980c394c | 888 | |
5b861f6b | 889 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
9b4437a5 | 890 | if (IS_ERR(rt)) |
891 | return PTR_ERR(rt); | |
371bd106 | 892 | |
6b4f92af SB |
893 | skb_tunnel_check_pmtu(skb, &rt->dst, |
894 | GENEVE_IPV4_HLEN + info->options_len); | |
52a589d5 | 895 | |
371bd106 | 896 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 897 | if (geneve->collect_md) { |
898 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
371bd106 | 899 | ttl = key->ttl; |
a025fb5f SB |
900 | |
901 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 902 | } else { |
9b4437a5 | 903 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
52d0d404 HL |
904 | if (geneve->ttl_inherit) |
905 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
906 | else | |
907 | ttl = key->ttl; | |
908 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
a025fb5f SB |
909 | |
910 | if (geneve->df == GENEVE_DF_SET) { | |
911 | df = htons(IP_DF); | |
912 | } else if (geneve->df == GENEVE_DF_INHERIT) { | |
913 | struct ethhdr *eth = eth_hdr(skb); | |
914 | ||
915 | if (ntohs(eth->h_proto) == ETH_P_IPV6) { | |
916 | df = htons(IP_DF); | |
917 | } else if (ntohs(eth->h_proto) == ETH_P_IP) { | |
918 | struct iphdr *iph = ip_hdr(skb); | |
919 | ||
920 | if (iph->frag_off & htons(IP_DF)) | |
921 | df = htons(IP_DF); | |
922 | } | |
923 | } | |
2d07dc79 | 924 | } |
2d07dc79 | 925 | |
c3ef5aa5 | 926 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 927 | if (unlikely(err)) |
928 | return err; | |
efeb2267 | 929 | |
9b4437a5 | 930 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
931 | tos, ttl, df, sport, geneve->info.key.tp_dst, | |
932 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
933 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
934 | return 0; | |
2d07dc79 JL |
935 | } |
936 | ||
8ed66f0e | 937 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 938 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 939 | struct geneve_dev *geneve, |
940 | const struct ip_tunnel_info *info) | |
8ed66f0e | 941 | { |
9b4437a5 | 942 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
943 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
944 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 945 | struct dst_entry *dst = NULL; |
8ed66f0e | 946 | struct flowi6 fl6; |
3a56f86f | 947 | __u8 prio, ttl; |
8ed66f0e | 948 | __be16 sport; |
bcceeec3 | 949 | int err; |
8ed66f0e | 950 | |
5b861f6b | 951 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
9b4437a5 | 952 | if (IS_ERR(dst)) |
953 | return PTR_ERR(dst); | |
8ed66f0e | 954 | |
6b4f92af | 955 | skb_tunnel_check_pmtu(skb, dst, GENEVE_IPV6_HLEN + info->options_len); |
52a589d5 | 956 | |
8ed66f0e | 957 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 958 | if (geneve->collect_md) { |
959 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
960 | ttl = key->ttl; | |
961 | } else { | |
962 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
963 | ip_hdr(skb), skb); | |
52d0d404 HL |
964 | if (geneve->ttl_inherit) |
965 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
966 | else | |
967 | ttl = key->ttl; | |
968 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
9b4437a5 | 969 | } |
31ac1c19 | 970 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 971 | if (unlikely(err)) |
972 | return err; | |
8ed66f0e | 973 | |
9b4437a5 | 974 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
975 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
976 | info->key.label, sport, geneve->info.key.tp_dst, | |
977 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
978 | return 0; | |
979 | } | |
980 | #endif | |
8ed66f0e | 981 | |
9b4437a5 | 982 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
983 | { | |
984 | struct geneve_dev *geneve = netdev_priv(dev); | |
985 | struct ip_tunnel_info *info = NULL; | |
986 | int err; | |
abe492b4 | 987 | |
9b4437a5 | 988 | if (geneve->collect_md) { |
989 | info = skb_tunnel_info(skb); | |
990 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
991 | err = -EINVAL; | |
992 | netdev_dbg(dev, "no tunnel metadata\n"); | |
aed069df | 993 | goto tx_error; |
9b4437a5 | 994 | } |
8ed66f0e | 995 | } else { |
9b4437a5 | 996 | info = &geneve->info; |
8ed66f0e | 997 | } |
8eb3b995 | 998 | |
a717e3f7 | 999 | rcu_read_lock(); |
9b4437a5 | 1000 | #if IS_ENABLED(CONFIG_IPV6) |
1001 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
1002 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
1003 | else | |
1004 | #endif | |
1005 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
a717e3f7 | 1006 | rcu_read_unlock(); |
8ed66f0e | 1007 | |
9b4437a5 | 1008 | if (likely(!err)) |
1009 | return NETDEV_TX_OK; | |
8ed66f0e JL |
1010 | tx_error: |
1011 | dev_kfree_skb(skb); | |
aed069df | 1012 | |
8ed66f0e JL |
1013 | if (err == -ELOOP) |
1014 | dev->stats.collisions++; | |
1015 | else if (err == -ENETUNREACH) | |
1016 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1017 | |
1018 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1019 | return NETDEV_TX_OK; |
1020 | } | |
8ed66f0e | 1021 | |
91572088 | 1022 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 1023 | { |
91572088 JW |
1024 | if (new_mtu > dev->max_mtu) |
1025 | new_mtu = dev->max_mtu; | |
321acc1c AK |
1026 | else if (new_mtu < dev->min_mtu) |
1027 | new_mtu = dev->min_mtu; | |
aeee0e66 | 1028 | |
55e5bfb5 DW |
1029 | dev->mtu = new_mtu; |
1030 | return 0; | |
1031 | } | |
1032 | ||
fc4099f1 PS |
1033 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1034 | { | |
1035 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1036 | struct geneve_dev *geneve = netdev_priv(dev); | |
fc4099f1 | 1037 | |
b8812fa8 | 1038 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 1039 | struct rtable *rt; |
1040 | struct flowi4 fl4; | |
5b861f6b | 1041 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); |
9b4437a5 | 1042 | |
5b861f6b | 1043 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
b8812fa8 JL |
1044 | if (IS_ERR(rt)) |
1045 | return PTR_ERR(rt); | |
fc4099f1 | 1046 | |
b8812fa8 JL |
1047 | ip_rt_put(rt); |
1048 | info->key.u.ipv4.src = fl4.saddr; | |
1049 | #if IS_ENABLED(CONFIG_IPV6) | |
1050 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 1051 | struct dst_entry *dst; |
1052 | struct flowi6 fl6; | |
5b861f6b | 1053 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); |
9b4437a5 | 1054 | |
5b861f6b | 1055 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
b8812fa8 JL |
1056 | if (IS_ERR(dst)) |
1057 | return PTR_ERR(dst); | |
1058 | ||
1059 | dst_release(dst); | |
1060 | info->key.u.ipv6.src = fl6.saddr; | |
1061 | #endif | |
1062 | } else { | |
1063 | return -EINVAL; | |
1064 | } | |
fc4099f1 | 1065 | |
fc4099f1 PS |
1066 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1067 | 1, USHRT_MAX, true); | |
9b4437a5 | 1068 | info->key.tp_dst = geneve->info.key.tp_dst; |
fc4099f1 PS |
1069 | return 0; |
1070 | } | |
1071 | ||
2d07dc79 JL |
1072 | static const struct net_device_ops geneve_netdev_ops = { |
1073 | .ndo_init = geneve_init, | |
1074 | .ndo_uninit = geneve_uninit, | |
1075 | .ndo_open = geneve_open, | |
1076 | .ndo_stop = geneve_stop, | |
1077 | .ndo_start_xmit = geneve_xmit, | |
1078 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1079 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1080 | .ndo_validate_addr = eth_validate_addr, |
1081 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1082 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1083 | }; |
1084 | ||
1085 | static void geneve_get_drvinfo(struct net_device *dev, | |
1086 | struct ethtool_drvinfo *drvinfo) | |
1087 | { | |
1088 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1089 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1090 | } | |
1091 | ||
1092 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1093 | .get_drvinfo = geneve_get_drvinfo, | |
1094 | .get_link = ethtool_op_get_link, | |
1095 | }; | |
1096 | ||
1097 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1098 | static struct device_type geneve_type = { | |
1099 | .name = "geneve", | |
1100 | }; | |
1101 | ||
e5de25dc | 1102 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1103 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1104 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1105 | */ |
2d2b13fc | 1106 | static void geneve_offload_rx_ports(struct net_device *dev, bool push) |
05ca4029 SA |
1107 | { |
1108 | struct net *net = dev_net(dev); | |
1109 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1110 | struct geneve_sock *gs; | |
681e683f | 1111 | |
05ca4029 | 1112 | rcu_read_lock(); |
2d2b13fc SD |
1113 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { |
1114 | if (push) { | |
1115 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1116 | UDP_TUNNEL_TYPE_GENEVE); | |
1117 | } else { | |
1118 | udp_tunnel_drop_rx_port(dev, gs->sock, | |
1119 | UDP_TUNNEL_TYPE_GENEVE); | |
1120 | } | |
1121 | } | |
05ca4029 SA |
1122 | rcu_read_unlock(); |
1123 | } | |
05ca4029 | 1124 | |
2d07dc79 JL |
1125 | /* Initialize the device structure. */ |
1126 | static void geneve_setup(struct net_device *dev) | |
1127 | { | |
1128 | ether_setup(dev); | |
1129 | ||
1130 | dev->netdev_ops = &geneve_netdev_ops; | |
1131 | dev->ethtool_ops = &geneve_ethtool_ops; | |
cf124db5 | 1132 | dev->needs_free_netdev = true; |
2d07dc79 JL |
1133 | |
1134 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1135 | ||
2d07dc79 JL |
1136 | dev->features |= NETIF_F_LLTX; |
1137 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1138 | dev->features |= NETIF_F_RXCSUM; | |
1139 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1140 | ||
2d07dc79 JL |
1141 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1142 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1143 | |
91572088 JW |
1144 | /* MTU range: 68 - (something less than 65535) */ |
1145 | dev->min_mtu = ETH_MIN_MTU; | |
1146 | /* The max_mtu calculation does not take account of GENEVE | |
1147 | * options, to avoid excluding potentially valid | |
1148 | * configurations. This will be further reduced by IPvX hdr size. | |
1149 | */ | |
1150 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1151 | ||
2d07dc79 | 1152 | netif_keep_dst(dev); |
fc41cdb3 | 1153 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1154 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1155 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1156 | } |
1157 | ||
1158 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1159 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1160 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1161 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1162 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1163 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1164 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1165 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1166 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1167 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1168 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1169 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
52d0d404 | 1170 | [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 }, |
a025fb5f | 1171 | [IFLA_GENEVE_DF] = { .type = NLA_U8 }, |
2d07dc79 JL |
1172 | }; |
1173 | ||
a8b8a889 MS |
1174 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], |
1175 | struct netlink_ext_ack *extack) | |
2d07dc79 JL |
1176 | { |
1177 | if (tb[IFLA_ADDRESS]) { | |
c5ebc440 GM |
1178 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1179 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1180 | "Provided link layer address is not Ethernet"); | |
2d07dc79 | 1181 | return -EINVAL; |
c5ebc440 | 1182 | } |
2d07dc79 | 1183 | |
c5ebc440 GM |
1184 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
1185 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1186 | "Provided Ethernet address is not unicast"); | |
2d07dc79 | 1187 | return -EADDRNOTAVAIL; |
c5ebc440 | 1188 | } |
2d07dc79 JL |
1189 | } |
1190 | ||
c5ebc440 GM |
1191 | if (!data) { |
1192 | NL_SET_ERR_MSG(extack, | |
1193 | "Not enough attributes provided to perform the operation"); | |
2d07dc79 | 1194 | return -EINVAL; |
c5ebc440 | 1195 | } |
2d07dc79 JL |
1196 | |
1197 | if (data[IFLA_GENEVE_ID]) { | |
1198 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1199 | ||
c5ebc440 GM |
1200 | if (vni >= GENEVE_N_VID) { |
1201 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID], | |
1202 | "Geneve ID must be lower than 16777216"); | |
2d07dc79 | 1203 | return -ERANGE; |
c5ebc440 | 1204 | } |
2d07dc79 JL |
1205 | } |
1206 | ||
a025fb5f SB |
1207 | if (data[IFLA_GENEVE_DF]) { |
1208 | enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1209 | ||
1210 | if (df < 0 || df > GENEVE_DF_MAX) { | |
1211 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_GENEVE_DF], | |
1212 | "Invalid DF attribute"); | |
1213 | return -EINVAL; | |
1214 | } | |
1215 | } | |
1216 | ||
2d07dc79 JL |
1217 | return 0; |
1218 | } | |
1219 | ||
371bd106 | 1220 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1221 | const struct ip_tunnel_info *info, |
371bd106 PS |
1222 | bool *tun_on_same_port, |
1223 | bool *tun_collect_md) | |
1224 | { | |
9b4437a5 | 1225 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1226 | |
1227 | *tun_on_same_port = false; | |
1228 | *tun_collect_md = false; | |
371bd106 | 1229 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9b4437a5 | 1230 | if (info->key.tp_dst == geneve->info.key.tp_dst) { |
371bd106 PS |
1231 | *tun_collect_md = geneve->collect_md; |
1232 | *tun_on_same_port = true; | |
1233 | } | |
9b4437a5 | 1234 | if (info->key.tun_id == geneve->info.key.tun_id && |
1235 | info->key.tp_dst == geneve->info.key.tp_dst && | |
1236 | !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1237 | t = geneve; |
1238 | } | |
1239 | return t; | |
1240 | } | |
1241 | ||
9b4437a5 | 1242 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) |
1243 | { | |
3fa5f11d SB |
1244 | return !(info->key.tun_id || info->key.tun_flags || info->key.tos || |
1245 | info->key.ttl || info->key.label || info->key.tp_src || | |
1246 | memchr_inv(&info->key.u, 0, sizeof(info->key.u))); | |
9b4437a5 | 1247 | } |
1248 | ||
5b861f6b GM |
1249 | static bool geneve_dst_addr_equal(struct ip_tunnel_info *a, |
1250 | struct ip_tunnel_info *b) | |
1251 | { | |
1252 | if (ip_tunnel_info_af(a) == AF_INET) | |
1253 | return a->key.u.ipv4.dst == b->key.u.ipv4.dst; | |
1254 | else | |
1255 | return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst); | |
1256 | } | |
1257 | ||
e305ac6c | 1258 | static int geneve_configure(struct net *net, struct net_device *dev, |
c5ebc440 | 1259 | struct netlink_ext_ack *extack, |
9b4437a5 | 1260 | const struct ip_tunnel_info *info, |
52d0d404 | 1261 | bool metadata, bool ipv6_rx_csum, |
a025fb5f | 1262 | bool ttl_inherit, enum ifla_geneve_df df) |
2d07dc79 JL |
1263 | { |
1264 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1265 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1266 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1267 | int err, encap_len; |
2d07dc79 | 1268 | |
c5ebc440 GM |
1269 | if (metadata && !is_tnl_info_zero(info)) { |
1270 | NL_SET_ERR_MSG(extack, | |
1271 | "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified"); | |
8ed66f0e | 1272 | return -EINVAL; |
c5ebc440 | 1273 | } |
2d07dc79 JL |
1274 | |
1275 | geneve->net = net; | |
1276 | geneve->dev = dev; | |
1277 | ||
9b4437a5 | 1278 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1279 | if (t) |
1280 | return -EBUSY; | |
1281 | ||
184fc8b5 PA |
1282 | /* make enough headroom for basic scenario */ |
1283 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9a1c44d9 | 1284 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1285 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1286 | dev->max_mtu -= sizeof(struct iphdr); |
1287 | } else { | |
184fc8b5 | 1288 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1289 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1290 | } | |
184fc8b5 PA |
1291 | dev->needed_headroom = encap_len + ETH_HLEN; |
1292 | ||
371bd106 | 1293 | if (metadata) { |
c5ebc440 GM |
1294 | if (tun_on_same_port) { |
1295 | NL_SET_ERR_MSG(extack, | |
1296 | "There can be only one externally controlled device on a destination port"); | |
371bd106 | 1297 | return -EPERM; |
c5ebc440 | 1298 | } |
371bd106 | 1299 | } else { |
c5ebc440 GM |
1300 | if (tun_collect_md) { |
1301 | NL_SET_ERR_MSG(extack, | |
1302 | "There already exists an externally controlled device on this destination port"); | |
371bd106 | 1303 | return -EPERM; |
c5ebc440 | 1304 | } |
371bd106 PS |
1305 | } |
1306 | ||
9b4437a5 | 1307 | dst_cache_reset(&geneve->info.dst_cache); |
1308 | geneve->info = *info; | |
1309 | geneve->collect_md = metadata; | |
1310 | geneve->use_udp6_rx_checksums = ipv6_rx_csum; | |
52d0d404 | 1311 | geneve->ttl_inherit = ttl_inherit; |
a025fb5f | 1312 | geneve->df = df; |
468dfffc | 1313 | |
2d07dc79 JL |
1314 | err = register_netdevice(dev); |
1315 | if (err) | |
1316 | return err; | |
1317 | ||
e305ac6c | 1318 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1319 | return 0; |
1320 | } | |
1321 | ||
9b4437a5 | 1322 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1323 | { | |
1324 | memset(info, 0, sizeof(*info)); | |
1325 | info->key.tp_dst = htons(dst_port); | |
1326 | } | |
1327 | ||
c5ebc440 GM |
1328 | static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[], |
1329 | struct netlink_ext_ack *extack, | |
1330 | struct ip_tunnel_info *info, bool *metadata, | |
52d0d404 | 1331 | bool *use_udp6_rx_checksums, bool *ttl_inherit, |
a025fb5f | 1332 | enum ifla_geneve_df *df, bool changelink) |
e305ac6c | 1333 | { |
c5ebc440 GM |
1334 | int attrtype; |
1335 | ||
1336 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) { | |
1337 | NL_SET_ERR_MSG(extack, | |
1338 | "Cannot specify both IPv4 and IPv6 Remote addresses"); | |
8ed66f0e | 1339 | return -EINVAL; |
c5ebc440 | 1340 | } |
8ed66f0e JL |
1341 | |
1342 | if (data[IFLA_GENEVE_REMOTE]) { | |
c5ebc440 GM |
1343 | if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) { |
1344 | attrtype = IFLA_GENEVE_REMOTE; | |
1345 | goto change_notsup; | |
1346 | } | |
5b861f6b GM |
1347 | |
1348 | info->key.u.ipv4.dst = | |
8ed66f0e | 1349 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1350 | |
5b861f6b | 1351 | if (IN_MULTICAST(ntohl(info->key.u.ipv4.dst))) { |
c5ebc440 GM |
1352 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE], |
1353 | "Remote IPv4 address cannot be Multicast"); | |
9b4437a5 | 1354 | return -EINVAL; |
1355 | } | |
8ed66f0e JL |
1356 | } |
1357 | ||
1358 | if (data[IFLA_GENEVE_REMOTE6]) { | |
4c52a889 | 1359 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1360 | if (changelink && (ip_tunnel_info_af(info) == AF_INET)) { |
1361 | attrtype = IFLA_GENEVE_REMOTE6; | |
1362 | goto change_notsup; | |
1363 | } | |
5b861f6b GM |
1364 | |
1365 | info->mode = IP_TUNNEL_INFO_IPV6; | |
1366 | info->key.u.ipv6.dst = | |
8ed66f0e JL |
1367 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1368 | ||
5b861f6b | 1369 | if (ipv6_addr_type(&info->key.u.ipv6.dst) & |
8ed66f0e | 1370 | IPV6_ADDR_LINKLOCAL) { |
c5ebc440 GM |
1371 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1372 | "Remote IPv6 address cannot be link-local"); | |
8ed66f0e JL |
1373 | return -EINVAL; |
1374 | } | |
5b861f6b | 1375 | if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) { |
c5ebc440 GM |
1376 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1377 | "Remote IPv6 address cannot be Multicast"); | |
9b4437a5 | 1378 | return -EINVAL; |
1379 | } | |
5b861f6b GM |
1380 | info->key.tun_flags |= TUNNEL_CSUM; |
1381 | *use_udp6_rx_checksums = true; | |
9b4437a5 | 1382 | #else |
c5ebc440 GM |
1383 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1384 | "IPv6 support not enabled in the kernel"); | |
9b4437a5 | 1385 | return -EPFNOSUPPORT; |
1386 | #endif | |
8ed66f0e JL |
1387 | } |
1388 | ||
9b4437a5 | 1389 | if (data[IFLA_GENEVE_ID]) { |
1390 | __u32 vni; | |
1391 | __u8 tvni[3]; | |
5b861f6b | 1392 | __be64 tunid; |
9b4437a5 | 1393 | |
e277de5f | 1394 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1395 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1396 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1397 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1398 | |
5b861f6b | 1399 | tunid = vni_to_tunnel_id(tvni); |
c5ebc440 GM |
1400 | if (changelink && (tunid != info->key.tun_id)) { |
1401 | attrtype = IFLA_GENEVE_ID; | |
1402 | goto change_notsup; | |
1403 | } | |
5b861f6b | 1404 | info->key.tun_id = tunid; |
9b4437a5 | 1405 | } |
5b861f6b | 1406 | |
a97d97ba HL |
1407 | if (data[IFLA_GENEVE_TTL_INHERIT]) { |
1408 | if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT])) | |
1409 | *ttl_inherit = true; | |
1410 | else | |
1411 | *ttl_inherit = false; | |
1412 | } else if (data[IFLA_GENEVE_TTL]) { | |
5b861f6b | 1413 | info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
a97d97ba HL |
1414 | *ttl_inherit = false; |
1415 | } | |
52d0d404 | 1416 | |
d8951125 | 1417 | if (data[IFLA_GENEVE_TOS]) |
5b861f6b | 1418 | info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1419 | |
a025fb5f SB |
1420 | if (data[IFLA_GENEVE_DF]) |
1421 | *df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1422 | ||
9b4437a5 | 1423 | if (data[IFLA_GENEVE_LABEL]) { |
5b861f6b | 1424 | info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & |
9b4437a5 | 1425 | IPV6_FLOWLABEL_MASK; |
c5ebc440 GM |
1426 | if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) { |
1427 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL], | |
1428 | "Label attribute only applies for IPv6 Geneve devices"); | |
9b4437a5 | 1429 | return -EINVAL; |
c5ebc440 | 1430 | } |
9b4437a5 | 1431 | } |
8eb3b995 | 1432 | |
5b861f6b | 1433 | if (data[IFLA_GENEVE_PORT]) { |
c5ebc440 GM |
1434 | if (changelink) { |
1435 | attrtype = IFLA_GENEVE_PORT; | |
1436 | goto change_notsup; | |
1437 | } | |
5b861f6b GM |
1438 | info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
1439 | } | |
2d07dc79 | 1440 | |
5b861f6b | 1441 | if (data[IFLA_GENEVE_COLLECT_METADATA]) { |
c5ebc440 GM |
1442 | if (changelink) { |
1443 | attrtype = IFLA_GENEVE_COLLECT_METADATA; | |
1444 | goto change_notsup; | |
1445 | } | |
5b861f6b GM |
1446 | *metadata = true; |
1447 | } | |
2d07dc79 | 1448 | |
5b861f6b | 1449 | if (data[IFLA_GENEVE_UDP_CSUM]) { |
c5ebc440 GM |
1450 | if (changelink) { |
1451 | attrtype = IFLA_GENEVE_UDP_CSUM; | |
1452 | goto change_notsup; | |
1453 | } | |
5b861f6b GM |
1454 | if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1455 | info->key.tun_flags |= TUNNEL_CSUM; | |
1456 | } | |
abe492b4 | 1457 | |
5b861f6b | 1458 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { |
f9094b76 | 1459 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1460 | if (changelink) { |
1461 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX; | |
1462 | goto change_notsup; | |
1463 | } | |
5b861f6b GM |
1464 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) |
1465 | info->key.tun_flags &= ~TUNNEL_CSUM; | |
f9094b76 HL |
1466 | #else |
1467 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX], | |
1468 | "IPv6 support not enabled in the kernel"); | |
1469 | return -EPFNOSUPPORT; | |
1470 | #endif | |
5b861f6b | 1471 | } |
abe492b4 | 1472 | |
5b861f6b | 1473 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { |
f9094b76 | 1474 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1475 | if (changelink) { |
1476 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX; | |
1477 | goto change_notsup; | |
1478 | } | |
5b861f6b GM |
1479 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) |
1480 | *use_udp6_rx_checksums = false; | |
f9094b76 HL |
1481 | #else |
1482 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX], | |
1483 | "IPv6 support not enabled in the kernel"); | |
1484 | return -EPFNOSUPPORT; | |
1485 | #endif | |
5b861f6b GM |
1486 | } |
1487 | ||
1488 | return 0; | |
c5ebc440 GM |
1489 | change_notsup: |
1490 | NL_SET_ERR_MSG_ATTR(extack, data[attrtype], | |
1491 | "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported"); | |
1492 | return -EOPNOTSUPP; | |
5b861f6b GM |
1493 | } |
1494 | ||
c40e89fd AK |
1495 | static void geneve_link_config(struct net_device *dev, |
1496 | struct ip_tunnel_info *info, struct nlattr *tb[]) | |
1497 | { | |
1498 | struct geneve_dev *geneve = netdev_priv(dev); | |
1499 | int ldev_mtu = 0; | |
1500 | ||
1501 | if (tb[IFLA_MTU]) { | |
1502 | geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | switch (ip_tunnel_info_af(info)) { | |
1507 | case AF_INET: { | |
1508 | struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst }; | |
1509 | struct rtable *rt = ip_route_output_key(geneve->net, &fl4); | |
1510 | ||
1511 | if (!IS_ERR(rt) && rt->dst.dev) { | |
1512 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN; | |
1513 | ip_rt_put(rt); | |
1514 | } | |
1515 | break; | |
1516 | } | |
1517 | #if IS_ENABLED(CONFIG_IPV6) | |
1518 | case AF_INET6: { | |
c0a47e44 HL |
1519 | struct rt6_info *rt; |
1520 | ||
1521 | if (!__in6_dev_get(dev)) | |
1522 | break; | |
1523 | ||
1524 | rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0, | |
1525 | NULL, 0); | |
c40e89fd AK |
1526 | |
1527 | if (rt && rt->dst.dev) | |
1528 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN; | |
1529 | ip6_rt_put(rt); | |
1530 | break; | |
1531 | } | |
1532 | #endif | |
1533 | } | |
1534 | ||
1535 | if (ldev_mtu <= 0) | |
1536 | return; | |
1537 | ||
1538 | geneve_change_mtu(dev, ldev_mtu - info->options_len); | |
1539 | } | |
1540 | ||
5b861f6b GM |
1541 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1542 | struct nlattr *tb[], struct nlattr *data[], | |
1543 | struct netlink_ext_ack *extack) | |
1544 | { | |
a025fb5f | 1545 | enum ifla_geneve_df df = GENEVE_DF_UNSET; |
5b861f6b GM |
1546 | bool use_udp6_rx_checksums = false; |
1547 | struct ip_tunnel_info info; | |
52d0d404 | 1548 | bool ttl_inherit = false; |
5b861f6b GM |
1549 | bool metadata = false; |
1550 | int err; | |
1551 | ||
1552 | init_tnl_info(&info, GENEVE_UDP_PORT); | |
c5ebc440 | 1553 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1554 | &use_udp6_rx_checksums, &ttl_inherit, &df, false); |
5b861f6b GM |
1555 | if (err) |
1556 | return err; | |
abe492b4 | 1557 | |
c40e89fd | 1558 | err = geneve_configure(net, dev, extack, &info, metadata, |
a025fb5f | 1559 | use_udp6_rx_checksums, ttl_inherit, df); |
c40e89fd AK |
1560 | if (err) |
1561 | return err; | |
1562 | ||
1563 | geneve_link_config(dev, &info, tb); | |
1564 | ||
1565 | return 0; | |
2d07dc79 JL |
1566 | } |
1567 | ||
5b861f6b GM |
1568 | /* Quiesces the geneve device data path for both TX and RX. |
1569 | * | |
1570 | * On transmit geneve checks for non-NULL geneve_sock before it proceeds. | |
1571 | * So, if we set that socket to NULL under RCU and wait for synchronize_net() | |
1572 | * to complete for the existing set of in-flight packets to be transmitted, | |
1573 | * then we would have quiesced the transmit data path. All the future packets | |
1574 | * will get dropped until we unquiesce the data path. | |
1575 | * | |
1576 | * On receive geneve dereference the geneve_sock stashed in the socket. So, | |
1577 | * if we set that to NULL under RCU and wait for synchronize_net() to | |
1578 | * complete, then we would have quiesced the receive data path. | |
1579 | */ | |
1580 | static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4, | |
1581 | struct geneve_sock **gs6) | |
1582 | { | |
1583 | *gs4 = rtnl_dereference(geneve->sock4); | |
1584 | rcu_assign_pointer(geneve->sock4, NULL); | |
1585 | if (*gs4) | |
1586 | rcu_assign_sk_user_data((*gs4)->sock->sk, NULL); | |
1587 | #if IS_ENABLED(CONFIG_IPV6) | |
1588 | *gs6 = rtnl_dereference(geneve->sock6); | |
1589 | rcu_assign_pointer(geneve->sock6, NULL); | |
1590 | if (*gs6) | |
1591 | rcu_assign_sk_user_data((*gs6)->sock->sk, NULL); | |
1592 | #else | |
1593 | *gs6 = NULL; | |
1594 | #endif | |
1595 | synchronize_net(); | |
1596 | } | |
1597 | ||
1598 | /* Resumes the geneve device data path for both TX and RX. */ | |
1599 | static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4, | |
1600 | struct geneve_sock __maybe_unused *gs6) | |
1601 | { | |
1602 | rcu_assign_pointer(geneve->sock4, gs4); | |
1603 | if (gs4) | |
1604 | rcu_assign_sk_user_data(gs4->sock->sk, gs4); | |
1605 | #if IS_ENABLED(CONFIG_IPV6) | |
1606 | rcu_assign_pointer(geneve->sock6, gs6); | |
1607 | if (gs6) | |
1608 | rcu_assign_sk_user_data(gs6->sock->sk, gs6); | |
1609 | #endif | |
1610 | synchronize_net(); | |
1611 | } | |
1612 | ||
1613 | static int geneve_changelink(struct net_device *dev, struct nlattr *tb[], | |
1614 | struct nlattr *data[], | |
1615 | struct netlink_ext_ack *extack) | |
1616 | { | |
1617 | struct geneve_dev *geneve = netdev_priv(dev); | |
1618 | struct geneve_sock *gs4, *gs6; | |
1619 | struct ip_tunnel_info info; | |
1620 | bool metadata; | |
1621 | bool use_udp6_rx_checksums; | |
a025fb5f | 1622 | enum ifla_geneve_df df; |
52d0d404 | 1623 | bool ttl_inherit; |
5b861f6b GM |
1624 | int err; |
1625 | ||
1626 | /* If the geneve device is configured for metadata (or externally | |
1627 | * controlled, for example, OVS), then nothing can be changed. | |
1628 | */ | |
1629 | if (geneve->collect_md) | |
1630 | return -EOPNOTSUPP; | |
1631 | ||
1632 | /* Start with the existing info. */ | |
1633 | memcpy(&info, &geneve->info, sizeof(info)); | |
1634 | metadata = geneve->collect_md; | |
1635 | use_udp6_rx_checksums = geneve->use_udp6_rx_checksums; | |
52d0d404 | 1636 | ttl_inherit = geneve->ttl_inherit; |
c5ebc440 | 1637 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1638 | &use_udp6_rx_checksums, &ttl_inherit, &df, true); |
5b861f6b GM |
1639 | if (err) |
1640 | return err; | |
1641 | ||
c40e89fd | 1642 | if (!geneve_dst_addr_equal(&geneve->info, &info)) { |
5b861f6b | 1643 | dst_cache_reset(&info.dst_cache); |
c40e89fd AK |
1644 | geneve_link_config(dev, &info, tb); |
1645 | } | |
5b861f6b GM |
1646 | |
1647 | geneve_quiesce(geneve, &gs4, &gs6); | |
1648 | geneve->info = info; | |
1649 | geneve->collect_md = metadata; | |
1650 | geneve->use_udp6_rx_checksums = use_udp6_rx_checksums; | |
52d0d404 | 1651 | geneve->ttl_inherit = ttl_inherit; |
5b861f6b GM |
1652 | geneve_unquiesce(geneve, gs4, gs6); |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
2d07dc79 JL |
1657 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
1658 | { | |
1659 | struct geneve_dev *geneve = netdev_priv(dev); | |
1660 | ||
2d07dc79 JL |
1661 | list_del(&geneve->next); |
1662 | unregister_netdevice_queue(dev, head); | |
1663 | } | |
1664 | ||
1665 | static size_t geneve_get_size(const struct net_device *dev) | |
1666 | { | |
1667 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1668 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1669 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1670 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
a025fb5f | 1671 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */ |
8eb3b995 | 1672 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1673 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1674 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1675 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1676 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1677 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
52d0d404 | 1678 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ |
2d07dc79 JL |
1679 | 0; |
1680 | } | |
1681 | ||
1682 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1683 | { | |
1684 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 1685 | struct ip_tunnel_info *info = &geneve->info; |
52d0d404 | 1686 | bool ttl_inherit = geneve->ttl_inherit; |
fd7eafd0 | 1687 | bool metadata = geneve->collect_md; |
9b4437a5 | 1688 | __u8 tmp_vni[3]; |
2d07dc79 JL |
1689 | __u32 vni; |
1690 | ||
9b4437a5 | 1691 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1692 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1693 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1694 | goto nla_put_failure; | |
1695 | ||
fd7eafd0 | 1696 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1697 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1698 | info->key.u.ipv4.dst)) |
1699 | goto nla_put_failure; | |
9b4437a5 | 1700 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1701 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1702 | goto nla_put_failure; |
9b4437a5 | 1703 | |
8ed66f0e | 1704 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1705 | } else if (!metadata) { |
8ed66f0e | 1706 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, |
9b4437a5 | 1707 | &info->key.u.ipv6.dst)) |
1708 | goto nla_put_failure; | |
9b4437a5 | 1709 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1710 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1711 | goto nla_put_failure; | |
11387fe4 | 1712 | #endif |
fd7eafd0 | 1713 | } |
2d07dc79 | 1714 | |
9b4437a5 | 1715 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1716 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1717 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1718 | goto nla_put_failure; |
1719 | ||
a025fb5f SB |
1720 | if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->df)) |
1721 | goto nla_put_failure; | |
1722 | ||
9b4437a5 | 1723 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1724 | goto nla_put_failure; |
1725 | ||
fd7eafd0 | 1726 | if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
f9094b76 | 1727 | goto nla_put_failure; |
fd7eafd0 | 1728 | |
f9094b76 | 1729 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 HL |
1730 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, |
1731 | !geneve->use_udp6_rx_checksums)) | |
1732 | goto nla_put_failure; | |
f9094b76 | 1733 | #endif |
fd7eafd0 | 1734 | |
52d0d404 HL |
1735 | if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) |
1736 | goto nla_put_failure; | |
1737 | ||
2d07dc79 JL |
1738 | return 0; |
1739 | ||
1740 | nla_put_failure: | |
1741 | return -EMSGSIZE; | |
1742 | } | |
1743 | ||
1744 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1745 | .kind = "geneve", | |
1746 | .maxtype = IFLA_GENEVE_MAX, | |
1747 | .policy = geneve_policy, | |
1748 | .priv_size = sizeof(struct geneve_dev), | |
1749 | .setup = geneve_setup, | |
1750 | .validate = geneve_validate, | |
1751 | .newlink = geneve_newlink, | |
5b861f6b | 1752 | .changelink = geneve_changelink, |
2d07dc79 JL |
1753 | .dellink = geneve_dellink, |
1754 | .get_size = geneve_get_size, | |
1755 | .fill_info = geneve_fill_info, | |
1756 | }; | |
1757 | ||
e305ac6c PS |
1758 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1759 | u8 name_assign_type, u16 dst_port) | |
1760 | { | |
1761 | struct nlattr *tb[IFLA_MAX + 1]; | |
9b4437a5 | 1762 | struct ip_tunnel_info info; |
e305ac6c | 1763 | struct net_device *dev; |
106da663 | 1764 | LIST_HEAD(list_kill); |
e305ac6c PS |
1765 | int err; |
1766 | ||
1767 | memset(tb, 0, sizeof(tb)); | |
1768 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 1769 | &geneve_link_ops, tb, NULL); |
e305ac6c PS |
1770 | if (IS_ERR(dev)) |
1771 | return dev; | |
1772 | ||
9b4437a5 | 1773 | init_tnl_info(&info, dst_port); |
a025fb5f SB |
1774 | err = geneve_configure(net, dev, NULL, &info, |
1775 | true, true, false, GENEVE_DF_UNSET); | |
106da663 ND |
1776 | if (err) { |
1777 | free_netdev(dev); | |
1778 | return ERR_PTR(err); | |
1779 | } | |
7e059158 DW |
1780 | |
1781 | /* openvswitch users expect packet sizes to be unrestricted, | |
1782 | * so set the largest MTU we can. | |
1783 | */ | |
91572088 | 1784 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1785 | if (err) |
1786 | goto err; | |
1787 | ||
41009481 ND |
1788 | err = rtnl_configure_link(dev, NULL); |
1789 | if (err < 0) | |
1790 | goto err; | |
1791 | ||
e305ac6c | 1792 | return dev; |
9b4437a5 | 1793 | err: |
106da663 ND |
1794 | geneve_dellink(dev, &list_kill); |
1795 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1796 | return ERR_PTR(err); |
e305ac6c PS |
1797 | } |
1798 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1799 | ||
681e683f HFS |
1800 | static int geneve_netdevice_event(struct notifier_block *unused, |
1801 | unsigned long event, void *ptr) | |
1802 | { | |
1803 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1804 | ||
2d2b13fc | 1805 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || |
04584957 | 1806 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { |
2d2b13fc | 1807 | geneve_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 SD |
1808 | } else if (event == NETDEV_UNREGISTER) { |
1809 | geneve_offload_rx_ports(dev, false); | |
1810 | } else if (event == NETDEV_REGISTER) { | |
1811 | geneve_offload_rx_ports(dev, true); | |
1812 | } | |
681e683f HFS |
1813 | |
1814 | return NOTIFY_DONE; | |
1815 | } | |
1816 | ||
1817 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1818 | .notifier_call = geneve_netdevice_event, | |
1819 | }; | |
1820 | ||
2d07dc79 JL |
1821 | static __net_init int geneve_init_net(struct net *net) |
1822 | { | |
1823 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1824 | |
1825 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1826 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1827 | return 0; |
1828 | } | |
1829 | ||
2843a253 | 1830 | static void geneve_destroy_tunnels(struct net *net, struct list_head *head) |
2d07dc79 JL |
1831 | { |
1832 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1833 | struct geneve_dev *geneve, *next; | |
1834 | struct net_device *dev, *aux; | |
2d07dc79 JL |
1835 | |
1836 | /* gather any geneve devices that were moved into this ns */ | |
1837 | for_each_netdev_safe(net, dev, aux) | |
1838 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
2843a253 | 1839 | unregister_netdevice_queue(dev, head); |
2d07dc79 JL |
1840 | |
1841 | /* now gather any other geneve devices that were created in this ns */ | |
1842 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1843 | /* If geneve->dev is in the same netns, it was already added | |
1844 | * to the list by the previous loop. | |
1845 | */ | |
1846 | if (!net_eq(dev_net(geneve->dev), net)) | |
2843a253 | 1847 | unregister_netdevice_queue(geneve->dev, head); |
2d07dc79 JL |
1848 | } |
1849 | ||
2843a253 HY |
1850 | WARN_ON_ONCE(!list_empty(&gn->sock_list)); |
1851 | } | |
1852 | ||
1853 | static void __net_exit geneve_exit_batch_net(struct list_head *net_list) | |
1854 | { | |
1855 | struct net *net; | |
1856 | LIST_HEAD(list); | |
1857 | ||
1858 | rtnl_lock(); | |
1859 | list_for_each_entry(net, net_list, exit_list) | |
1860 | geneve_destroy_tunnels(net, &list); | |
1861 | ||
2d07dc79 JL |
1862 | /* unregister the devices gathered above */ |
1863 | unregister_netdevice_many(&list); | |
1864 | rtnl_unlock(); | |
1865 | } | |
1866 | ||
1867 | static struct pernet_operations geneve_net_ops = { | |
1868 | .init = geneve_init_net, | |
2843a253 | 1869 | .exit_batch = geneve_exit_batch_net, |
2d07dc79 JL |
1870 | .id = &geneve_net_id, |
1871 | .size = sizeof(struct geneve_net), | |
1872 | }; | |
1873 | ||
1874 | static int __init geneve_init_module(void) | |
1875 | { | |
1876 | int rc; | |
1877 | ||
1878 | rc = register_pernet_subsys(&geneve_net_ops); | |
1879 | if (rc) | |
1880 | goto out1; | |
1881 | ||
681e683f | 1882 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1883 | if (rc) |
1884 | goto out2; | |
1885 | ||
681e683f HFS |
1886 | rc = rtnl_link_register(&geneve_link_ops); |
1887 | if (rc) | |
1888 | goto out3; | |
1889 | ||
2d07dc79 | 1890 | return 0; |
681e683f HFS |
1891 | out3: |
1892 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1893 | out2: |
1894 | unregister_pernet_subsys(&geneve_net_ops); | |
1895 | out1: | |
1896 | return rc; | |
1897 | } | |
1898 | late_initcall(geneve_init_module); | |
1899 | ||
1900 | static void __exit geneve_cleanup_module(void) | |
1901 | { | |
1902 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1903 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1904 | unregister_pernet_subsys(&geneve_net_ops); |
1905 | } | |
1906 | module_exit(geneve_cleanup_module); | |
1907 | ||
1908 | MODULE_LICENSE("GPL"); | |
1909 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1910 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1911 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1912 | MODULE_ALIAS_RTNL_LINK("geneve"); |