Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2d07dc79 JL |
2 | /* |
3 | * GENEVE: Generic Network Virtualization Encapsulation | |
4 | * | |
5 | * Copyright (c) 2015 Red Hat, Inc. | |
2d07dc79 JL |
6 | */ |
7 | ||
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | ||
cc69837f | 10 | #include <linux/ethtool.h> |
2d07dc79 JL |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> | |
2d07dc79 JL |
13 | #include <linux/etherdevice.h> |
14 | #include <linux/hash.h> | |
3616d08b | 15 | #include <net/ipv6_stubs.h> |
e305ac6c | 16 | #include <net/dst_metadata.h> |
8e816df8 | 17 | #include <net/gro_cells.h> |
2d07dc79 JL |
18 | #include <net/rtnetlink.h> |
19 | #include <net/geneve.h> | |
371bd106 | 20 | #include <net/protocol.h> |
2d07dc79 JL |
21 | |
22 | #define GENEVE_NETDEV_VER "0.6" | |
23 | ||
2d07dc79 JL |
24 | #define GENEVE_N_VID (1u << 24) |
25 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
26 | ||
27 | #define VNI_HASH_BITS 10 | |
28 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
29 | ||
30 | static bool log_ecn_error = true; | |
31 | module_param(log_ecn_error, bool, 0644); | |
32 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
33 | ||
371bd106 PS |
34 | #define GENEVE_VER 0 |
35 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
5edbea69 AK |
36 | #define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN) |
37 | #define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN) | |
371bd106 | 38 | |
2d07dc79 JL |
39 | /* per-network namespace private data for this module */ |
40 | struct geneve_net { | |
371bd106 | 41 | struct list_head geneve_list; |
371bd106 | 42 | struct list_head sock_list; |
2d07dc79 JL |
43 | }; |
44 | ||
c7d03a00 | 45 | static unsigned int geneve_net_id; |
371bd106 | 46 | |
4b4c21fa JB |
47 | struct geneve_dev_node { |
48 | struct hlist_node hlist; | |
49 | struct geneve_dev *geneve; | |
50 | }; | |
51 | ||
9e06e859 SD |
52 | struct geneve_config { |
53 | struct ip_tunnel_info info; | |
54 | bool collect_md; | |
55 | bool use_udp6_rx_checksums; | |
56 | bool ttl_inherit; | |
57 | enum ifla_geneve_df df; | |
58 | }; | |
59 | ||
2d07dc79 JL |
60 | /* Pseudo network device */ |
61 | struct geneve_dev { | |
4b4c21fa JB |
62 | struct geneve_dev_node hlist4; /* vni hash table for IPv4 socket */ |
63 | #if IS_ENABLED(CONFIG_IPV6) | |
64 | struct geneve_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
65 | #endif | |
2d07dc79 JL |
66 | struct net *net; /* netns for packet i/o */ |
67 | struct net_device *dev; /* netdev for geneve tunnel */ | |
fceb9c3e | 68 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 69 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 70 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 71 | #endif |
2d07dc79 | 72 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 73 | struct gro_cells gro_cells; |
9e06e859 | 74 | struct geneve_config cfg; |
2d07dc79 JL |
75 | }; |
76 | ||
371bd106 PS |
77 | struct geneve_sock { |
78 | bool collect_md; | |
371bd106 PS |
79 | struct list_head list; |
80 | struct socket *sock; | |
81 | struct rcu_head rcu; | |
82 | int refcnt; | |
66d47003 | 83 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 84 | }; |
2d07dc79 JL |
85 | |
86 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
87 | { | |
88 | __u32 vnid; | |
89 | ||
90 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
91 | return hash_32(vnid, VNI_HASH_BITS); | |
92 | } | |
93 | ||
e305ac6c PS |
94 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
95 | { | |
96 | #ifdef __BIG_ENDIAN | |
97 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
98 | #else | |
99 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
100 | ((__force u64)vni[1] << 48) | | |
101 | ((__force u64)vni[2] << 56)); | |
102 | #endif | |
103 | } | |
104 | ||
9b4437a5 | 105 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
106 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
107 | { | |
108 | #ifdef __BIG_ENDIAN | |
109 | vni[0] = (__force __u8)(tun_id >> 16); | |
110 | vni[1] = (__force __u8)(tun_id >> 8); | |
111 | vni[2] = (__force __u8)tun_id; | |
112 | #else | |
113 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
114 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
115 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
116 | #endif | |
117 | } | |
118 | ||
2e0b26e1 | 119 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
120 | { | |
2e0b26e1 | 121 | return !memcmp(vni, &tun_id[5], 3); |
2e0b26e1 | 122 | } |
123 | ||
1e9f12ec JB |
124 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
125 | { | |
126 | return gs->sock->sk->sk_family; | |
127 | } | |
128 | ||
66d47003 | 129 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 130 | __be32 addr, u8 vni[]) |
2d07dc79 | 131 | { |
2d07dc79 | 132 | struct hlist_head *vni_list_head; |
4b4c21fa | 133 | struct geneve_dev_node *node; |
2d07dc79 JL |
134 | __u32 hash; |
135 | ||
2d07dc79 | 136 | /* Find the device for this VNI */ |
371bd106 | 137 | hash = geneve_net_vni_hash(vni); |
66d47003 | 138 | vni_list_head = &gs->vni_list[hash]; |
4b4c21fa | 139 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
9e06e859 SD |
140 | if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) && |
141 | addr == node->geneve->cfg.info.key.u.ipv4.dst) | |
4b4c21fa | 142 | return node->geneve; |
8ed66f0e JL |
143 | } |
144 | return NULL; | |
145 | } | |
146 | ||
147 | #if IS_ENABLED(CONFIG_IPV6) | |
148 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
149 | struct in6_addr addr6, u8 vni[]) | |
150 | { | |
151 | struct hlist_head *vni_list_head; | |
4b4c21fa | 152 | struct geneve_dev_node *node; |
8ed66f0e JL |
153 | __u32 hash; |
154 | ||
155 | /* Find the device for this VNI */ | |
156 | hash = geneve_net_vni_hash(vni); | |
157 | vni_list_head = &gs->vni_list[hash]; | |
4b4c21fa | 158 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
9e06e859 SD |
159 | if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) && |
160 | ipv6_addr_equal(&addr6, &node->geneve->cfg.info.key.u.ipv6.dst)) | |
4b4c21fa | 161 | return node->geneve; |
2d07dc79 | 162 | } |
e305ac6c PS |
163 | return NULL; |
164 | } | |
8ed66f0e | 165 | #endif |
e305ac6c | 166 | |
371bd106 PS |
167 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
168 | { | |
169 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
170 | } | |
171 | ||
9fc47545 JB |
172 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
173 | struct sk_buff *skb) | |
e305ac6c | 174 | { |
8ed66f0e | 175 | static u8 zero_vni[3]; |
9b4437a5 | 176 | u8 *vni; |
e305ac6c | 177 | |
1e9f12ec | 178 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 179 | struct iphdr *iph; |
9b4437a5 | 180 | __be32 addr; |
9fc47545 | 181 | |
8ed66f0e | 182 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 183 | |
8ed66f0e JL |
184 | if (gs->collect_md) { |
185 | vni = zero_vni; | |
186 | addr = 0; | |
187 | } else { | |
9fc47545 | 188 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
189 | addr = iph->saddr; |
190 | } | |
191 | ||
9fc47545 | 192 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 193 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 194 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 195 | static struct in6_addr zero_addr6; |
9fc47545 JB |
196 | struct ipv6hdr *ip6h; |
197 | struct in6_addr addr6; | |
198 | ||
8ed66f0e | 199 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 200 | |
8ed66f0e JL |
201 | if (gs->collect_md) { |
202 | vni = zero_vni; | |
203 | addr6 = zero_addr6; | |
204 | } else { | |
9fc47545 | 205 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
206 | addr6 = ip6h->saddr; |
207 | } | |
208 | ||
9fc47545 | 209 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
210 | #endif |
211 | } | |
9fc47545 JB |
212 | return NULL; |
213 | } | |
214 | ||
215 | /* geneve receive/decap routine */ | |
216 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
217 | struct sk_buff *skb) | |
218 | { | |
219 | struct genevehdr *gnvh = geneve_hdr(skb); | |
220 | struct metadata_dst *tun_dst = NULL; | |
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 | 227 | |
9c2e14b4 | 228 | flags = TUNNEL_KEY | (gnvh->oam ? TUNNEL_OAM : 0) | |
e305ac6c PS |
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) */ |
c02bd115 JK |
261 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) { |
262 | geneve->dev->stats.rx_errors++; | |
263 | goto drop; | |
fe741e23 | 264 | } |
c02bd115 | 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); | |
1e84527b FF |
298 | if (likely(err == NET_RX_SUCCESS)) |
299 | dev_sw_netstats_rx_add(geneve->dev, len); | |
300 | ||
2d07dc79 JL |
301 | return; |
302 | drop: | |
303 | /* Consume bad packet */ | |
304 | kfree_skb(skb); | |
305 | } | |
306 | ||
307 | /* Setup stats when device is created */ | |
308 | static int geneve_init(struct net_device *dev) | |
309 | { | |
8e816df8 JG |
310 | struct geneve_dev *geneve = netdev_priv(dev); |
311 | int err; | |
312 | ||
2d07dc79 JL |
313 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
314 | if (!dev->tstats) | |
315 | return -ENOMEM; | |
8e816df8 JG |
316 | |
317 | err = gro_cells_init(&geneve->gro_cells, dev); | |
318 | if (err) { | |
319 | free_percpu(dev->tstats); | |
320 | return err; | |
321 | } | |
322 | ||
9e06e859 | 323 | err = dst_cache_init(&geneve->cfg.info.dst_cache, GFP_KERNEL); |
468dfffc PA |
324 | if (err) { |
325 | free_percpu(dev->tstats); | |
326 | gro_cells_destroy(&geneve->gro_cells); | |
327 | return err; | |
328 | } | |
2d07dc79 JL |
329 | return 0; |
330 | } | |
331 | ||
332 | static void geneve_uninit(struct net_device *dev) | |
333 | { | |
8e816df8 JG |
334 | struct geneve_dev *geneve = netdev_priv(dev); |
335 | ||
9e06e859 | 336 | dst_cache_destroy(&geneve->cfg.info.dst_cache); |
8e816df8 | 337 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
338 | free_percpu(dev->tstats); |
339 | } | |
340 | ||
371bd106 PS |
341 | /* Callback from net/ipv4/udp.c to receive packets */ |
342 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
343 | { | |
344 | struct genevehdr *geneveh; | |
9fc47545 | 345 | struct geneve_dev *geneve; |
371bd106 PS |
346 | struct geneve_sock *gs; |
347 | int opts_len; | |
348 | ||
fe741e23 | 349 | /* Need UDP and Geneve header to be present */ |
371bd106 | 350 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) |
e5aed006 | 351 | goto drop; |
371bd106 PS |
352 | |
353 | /* Return packets with reserved bits set */ | |
354 | geneveh = geneve_hdr(skb); | |
355 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 356 | goto drop; |
371bd106 PS |
357 | |
358 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 359 | goto drop; |
371bd106 | 360 | |
9fc47545 JB |
361 | gs = rcu_dereference_sk_user_data(sk); |
362 | if (!gs) | |
363 | goto drop; | |
364 | ||
365 | geneve = geneve_lookup_skb(gs, skb); | |
366 | if (!geneve) | |
367 | goto drop; | |
368 | ||
371bd106 PS |
369 | opts_len = geneveh->opt_len * 4; |
370 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 | 371 | htons(ETH_P_TEB), |
fe741e23 GM |
372 | !net_eq(geneve->net, dev_net(geneve->dev)))) { |
373 | geneve->dev->stats.rx_dropped++; | |
371bd106 | 374 | goto drop; |
fe741e23 | 375 | } |
371bd106 | 376 | |
9fc47545 | 377 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
378 | return 0; |
379 | ||
380 | drop: | |
381 | /* Consume bad packet */ | |
382 | kfree_skb(skb); | |
383 | return 0; | |
371bd106 PS |
384 | } |
385 | ||
a0796644 SB |
386 | /* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */ |
387 | static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb) | |
388 | { | |
389 | struct genevehdr *geneveh; | |
390 | struct geneve_sock *gs; | |
391 | u8 zero_vni[3] = { 0 }; | |
392 | u8 *vni = zero_vni; | |
393 | ||
eccc73a6 | 394 | if (!pskb_may_pull(skb, skb_transport_offset(skb) + GENEVE_BASE_HLEN)) |
a0796644 SB |
395 | return -EINVAL; |
396 | ||
397 | geneveh = geneve_hdr(skb); | |
398 | if (geneveh->ver != GENEVE_VER) | |
399 | return -EINVAL; | |
400 | ||
401 | if (geneveh->proto_type != htons(ETH_P_TEB)) | |
402 | return -EINVAL; | |
403 | ||
404 | gs = rcu_dereference_sk_user_data(sk); | |
405 | if (!gs) | |
406 | return -ENOENT; | |
407 | ||
408 | if (geneve_get_sk_family(gs) == AF_INET) { | |
409 | struct iphdr *iph = ip_hdr(skb); | |
410 | __be32 addr4 = 0; | |
411 | ||
412 | if (!gs->collect_md) { | |
413 | vni = geneve_hdr(skb)->vni; | |
414 | addr4 = iph->daddr; | |
415 | } | |
416 | ||
417 | return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT; | |
418 | } | |
419 | ||
420 | #if IS_ENABLED(CONFIG_IPV6) | |
421 | if (geneve_get_sk_family(gs) == AF_INET6) { | |
422 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
8a962c4a NC |
423 | struct in6_addr addr6; |
424 | ||
425 | memset(&addr6, 0, sizeof(struct in6_addr)); | |
a0796644 SB |
426 | |
427 | if (!gs->collect_md) { | |
428 | vni = geneve_hdr(skb)->vni; | |
429 | addr6 = ip6h->daddr; | |
430 | } | |
431 | ||
432 | return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT; | |
433 | } | |
434 | #endif | |
435 | ||
436 | return -EPFNOSUPPORT; | |
437 | } | |
438 | ||
371bd106 | 439 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, |
9b4437a5 | 440 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
441 | { |
442 | struct socket *sock; | |
443 | struct udp_port_cfg udp_conf; | |
444 | int err; | |
445 | ||
446 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
447 | ||
448 | if (ipv6) { | |
449 | udp_conf.family = AF_INET6; | |
8ed66f0e | 450 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 451 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
452 | } else { |
453 | udp_conf.family = AF_INET; | |
454 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
455 | } | |
456 | ||
457 | udp_conf.local_udp_port = port; | |
458 | ||
459 | /* Open UDP socket */ | |
460 | err = udp_sock_create(net, &udp_conf, &sock); | |
461 | if (err < 0) | |
462 | return ERR_PTR(err); | |
463 | ||
464 | return sock; | |
465 | } | |
466 | ||
371bd106 PS |
467 | static int geneve_hlen(struct genevehdr *gh) |
468 | { | |
469 | return sizeof(*gh) + gh->opt_len * 4; | |
470 | } | |
471 | ||
d4546c25 DM |
472 | static struct sk_buff *geneve_gro_receive(struct sock *sk, |
473 | struct list_head *head, | |
474 | struct sk_buff *skb) | |
371bd106 | 475 | { |
d4546c25 DM |
476 | struct sk_buff *pp = NULL; |
477 | struct sk_buff *p; | |
371bd106 PS |
478 | struct genevehdr *gh, *gh2; |
479 | unsigned int hlen, gh_len, off_gnv; | |
480 | const struct packet_offload *ptype; | |
481 | __be16 type; | |
482 | int flush = 1; | |
483 | ||
484 | off_gnv = skb_gro_offset(skb); | |
485 | hlen = off_gnv + sizeof(*gh); | |
486 | gh = skb_gro_header_fast(skb, off_gnv); | |
487 | if (skb_gro_header_hard(skb, hlen)) { | |
488 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
489 | if (unlikely(!gh)) | |
490 | goto out; | |
491 | } | |
492 | ||
493 | if (gh->ver != GENEVE_VER || gh->oam) | |
494 | goto out; | |
495 | gh_len = geneve_hlen(gh); | |
496 | ||
497 | hlen = off_gnv + gh_len; | |
498 | if (skb_gro_header_hard(skb, hlen)) { | |
499 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
500 | if (unlikely(!gh)) | |
501 | goto out; | |
502 | } | |
503 | ||
d4546c25 | 504 | list_for_each_entry(p, head, list) { |
371bd106 PS |
505 | if (!NAPI_GRO_CB(p)->same_flow) |
506 | continue; | |
507 | ||
508 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
509 | if (gh->opt_len != gh2->opt_len || | |
510 | memcmp(gh, gh2, gh_len)) { | |
511 | NAPI_GRO_CB(p)->same_flow = 0; | |
512 | continue; | |
513 | } | |
514 | } | |
515 | ||
516 | type = gh->proto_type; | |
517 | ||
518 | rcu_read_lock(); | |
519 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 520 | if (!ptype) |
371bd106 | 521 | goto out_unlock; |
371bd106 PS |
522 | |
523 | skb_gro_pull(skb, gh_len); | |
524 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 525 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 526 | flush = 0; |
371bd106 PS |
527 | |
528 | out_unlock: | |
529 | rcu_read_unlock(); | |
530 | out: | |
603d4cf8 | 531 | skb_gro_flush_final(skb, pp, flush); |
371bd106 PS |
532 | |
533 | return pp; | |
534 | } | |
535 | ||
4a0090a9 TH |
536 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
537 | int nhoff) | |
371bd106 PS |
538 | { |
539 | struct genevehdr *gh; | |
540 | struct packet_offload *ptype; | |
541 | __be16 type; | |
542 | int gh_len; | |
543 | int err = -ENOSYS; | |
544 | ||
371bd106 PS |
545 | gh = (struct genevehdr *)(skb->data + nhoff); |
546 | gh_len = geneve_hlen(gh); | |
547 | type = gh->proto_type; | |
548 | ||
549 | rcu_read_lock(); | |
550 | ptype = gro_find_complete_by_type(type); | |
551 | if (ptype) | |
552 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
553 | ||
554 | rcu_read_unlock(); | |
229740c6 JR |
555 | |
556 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
557 | ||
371bd106 PS |
558 | return err; |
559 | } | |
560 | ||
561 | /* Create new listen socket if needed */ | |
562 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 563 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
564 | { |
565 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
566 | struct geneve_sock *gs; | |
567 | struct socket *sock; | |
568 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 569 | int h; |
371bd106 PS |
570 | |
571 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
572 | if (!gs) | |
573 | return ERR_PTR(-ENOMEM); | |
574 | ||
9b4437a5 | 575 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
576 | if (IS_ERR(sock)) { |
577 | kfree(gs); | |
578 | return ERR_CAST(sock); | |
579 | } | |
580 | ||
581 | gs->sock = sock; | |
582 | gs->refcnt = 1; | |
66d47003 PS |
583 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
584 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
585 | |
586 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 587 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
588 | |
589 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 590 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
591 | tunnel_cfg.sk_user_data = gs; |
592 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
593 | tunnel_cfg.gro_receive = geneve_gro_receive; |
594 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 | 595 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
a0796644 | 596 | tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup; |
371bd106 PS |
597 | tunnel_cfg.encap_destroy = NULL; |
598 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
599 | list_add(&gs->list, &gn->sock_list); |
600 | return gs; | |
601 | } | |
602 | ||
8ed66f0e | 603 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 604 | { |
8ed66f0e | 605 | if (!gs || --gs->refcnt) |
371bd106 PS |
606 | return; |
607 | ||
608 | list_del(&gs->list); | |
e7b3db5e | 609 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
610 | udp_tunnel_sock_release(gs->sock); |
611 | kfree_rcu(gs, rcu); | |
612 | } | |
613 | ||
8ed66f0e JL |
614 | static void geneve_sock_release(struct geneve_dev *geneve) |
615 | { | |
fceb9c3e | 616 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 617 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 618 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
619 | ||
620 | rcu_assign_pointer(geneve->sock6, NULL); | |
621 | #endif | |
622 | ||
623 | rcu_assign_pointer(geneve->sock4, NULL); | |
624 | synchronize_net(); | |
625 | ||
626 | __geneve_sock_release(gs4); | |
627 | #if IS_ENABLED(CONFIG_IPV6) | |
628 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
629 | #endif |
630 | } | |
631 | ||
371bd106 | 632 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 633 | sa_family_t family, |
371bd106 PS |
634 | __be16 dst_port) |
635 | { | |
636 | struct geneve_sock *gs; | |
637 | ||
638 | list_for_each_entry(gs, &gn->sock_list, list) { | |
639 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 640 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
641 | return gs; |
642 | } | |
643 | } | |
644 | return NULL; | |
645 | } | |
646 | ||
8ed66f0e | 647 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 648 | { |
2d07dc79 | 649 | struct net *net = geneve->net; |
371bd106 | 650 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
4b4c21fa | 651 | struct geneve_dev_node *node; |
2d07dc79 | 652 | struct geneve_sock *gs; |
9b4437a5 | 653 | __u8 vni[3]; |
66d47003 | 654 | __u32 hash; |
2d07dc79 | 655 | |
9e06e859 | 656 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->cfg.info.key.tp_dst); |
371bd106 PS |
657 | if (gs) { |
658 | gs->refcnt++; | |
659 | goto out; | |
660 | } | |
661 | ||
9e06e859 SD |
662 | gs = geneve_socket_create(net, geneve->cfg.info.key.tp_dst, ipv6, |
663 | geneve->cfg.use_udp6_rx_checksums); | |
2d07dc79 JL |
664 | if (IS_ERR(gs)) |
665 | return PTR_ERR(gs); | |
666 | ||
371bd106 | 667 | out: |
9e06e859 | 668 | gs->collect_md = geneve->cfg.collect_md; |
8ed66f0e | 669 | #if IS_ENABLED(CONFIG_IPV6) |
4b4c21fa | 670 | if (ipv6) { |
fceb9c3e | 671 | rcu_assign_pointer(geneve->sock6, gs); |
4b4c21fa JB |
672 | node = &geneve->hlist6; |
673 | } else | |
8ed66f0e | 674 | #endif |
4b4c21fa | 675 | { |
fceb9c3e | 676 | rcu_assign_pointer(geneve->sock4, gs); |
4b4c21fa JB |
677 | node = &geneve->hlist4; |
678 | } | |
679 | node->geneve = geneve; | |
66d47003 | 680 | |
9e06e859 | 681 | tunnel_id_to_vni(geneve->cfg.info.key.tun_id, vni); |
9b4437a5 | 682 | hash = geneve_net_vni_hash(vni); |
4b4c21fa | 683 | hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
684 | return 0; |
685 | } | |
686 | ||
8ed66f0e JL |
687 | static int geneve_open(struct net_device *dev) |
688 | { | |
689 | struct geneve_dev *geneve = netdev_priv(dev); | |
9e06e859 | 690 | bool metadata = geneve->cfg.collect_md; |
cf1c9ccb | 691 | bool ipv4, ipv6; |
8ed66f0e JL |
692 | int ret = 0; |
693 | ||
9e06e859 | 694 | ipv6 = geneve->cfg.info.mode & IP_TUNNEL_INFO_IPV6 || metadata; |
cf1c9ccb | 695 | ipv4 = !ipv6 || metadata; |
8ed66f0e | 696 | #if IS_ENABLED(CONFIG_IPV6) |
cf1c9ccb | 697 | if (ipv6) { |
8ed66f0e | 698 | ret = geneve_sock_add(geneve, true); |
cf1c9ccb JB |
699 | if (ret < 0 && ret != -EAFNOSUPPORT) |
700 | ipv4 = false; | |
701 | } | |
8ed66f0e | 702 | #endif |
cf1c9ccb | 703 | if (ipv4) |
8ed66f0e JL |
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, |
34beb215 MG |
775 | const struct ip_tunnel_info *info, |
776 | __be16 dport, __be16 sport) | |
e305ac6c | 777 | { |
db3c6139 | 778 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 779 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 780 | struct dst_cache *dst_cache; |
e305ac6c PS |
781 | struct rtable *rt = NULL; |
782 | __u8 tos; | |
783 | ||
5b861f6b | 784 | if (!gs4) |
fceb9c3e | 785 | return ERR_PTR(-EIO); |
786 | ||
e305ac6c PS |
787 | memset(fl4, 0, sizeof(*fl4)); |
788 | fl4->flowi4_mark = skb->mark; | |
789 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 790 | fl4->daddr = info->key.u.ipv4.dst; |
791 | fl4->saddr = info->key.u.ipv4.src; | |
34beb215 MG |
792 | fl4->fl4_dport = dport; |
793 | fl4->fl4_sport = sport; | |
e305ac6c | 794 | |
9b4437a5 | 795 | tos = info->key.tos; |
9e06e859 | 796 | if ((tos == 1) && !geneve->cfg.collect_md) { |
9b4437a5 | 797 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); |
798 | use_cache = false; | |
468dfffc | 799 | } |
9b4437a5 | 800 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 801 | |
c3ef5aa5 | 802 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
803 | if (use_cache) { |
804 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
805 | if (rt) | |
806 | return rt; | |
e305ac6c | 807 | } |
e305ac6c PS |
808 | rt = ip_route_output_key(geneve->net, fl4); |
809 | if (IS_ERR(rt)) { | |
810 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 811 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
812 | } |
813 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
814 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 815 | ip_rt_put(rt); |
fc4099f1 | 816 | return ERR_PTR(-ELOOP); |
e305ac6c | 817 | } |
468dfffc PA |
818 | if (use_cache) |
819 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
820 | return rt; |
821 | } | |
822 | ||
8ed66f0e JL |
823 | #if IS_ENABLED(CONFIG_IPV6) |
824 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
825 | struct net_device *dev, | |
5b861f6b | 826 | struct geneve_sock *gs6, |
8ed66f0e | 827 | struct flowi6 *fl6, |
34beb215 MG |
828 | const struct ip_tunnel_info *info, |
829 | __be16 dport, __be16 sport) | |
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; | |
34beb215 MG |
845 | fl6->fl6_dport = dport; |
846 | fl6->fl6_sport = sport; | |
847 | ||
9b4437a5 | 848 | prio = info->key.tos; |
9e06e859 | 849 | if ((prio == 1) && !geneve->cfg.collect_md) { |
9b4437a5 | 850 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); |
851 | use_cache = false; | |
468dfffc PA |
852 | } |
853 | ||
9b4437a5 | 854 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
855 | info->key.label); | |
c3ef5aa5 | 856 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
857 | if (use_cache) { |
858 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
859 | if (dst) | |
860 | return dst; | |
8ed66f0e | 861 | } |
6c8991f4 SD |
862 | dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6, |
863 | NULL); | |
864 | if (IS_ERR(dst)) { | |
8ed66f0e JL |
865 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); |
866 | return ERR_PTR(-ENETUNREACH); | |
867 | } | |
868 | if (dst->dev == dev) { /* is this necessary? */ | |
869 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
870 | dst_release(dst); | |
871 | return ERR_PTR(-ELOOP); | |
872 | } | |
873 | ||
468dfffc PA |
874 | if (use_cache) |
875 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
876 | return dst; |
877 | } | |
878 | #endif | |
879 | ||
9b4437a5 | 880 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 881 | struct geneve_dev *geneve, |
882 | const struct ip_tunnel_info *info) | |
2d07dc79 | 883 | { |
9b4437a5 | 884 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
885 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
886 | const struct ip_tunnel_key *key = &info->key; | |
887 | struct rtable *rt; | |
2d07dc79 | 888 | struct flowi4 fl4; |
8760ce58 | 889 | __u8 tos, ttl; |
a025fb5f | 890 | __be16 df = 0; |
e305ac6c | 891 | __be16 sport; |
bcceeec3 | 892 | int err; |
980c394c | 893 | |
34beb215 MG |
894 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
895 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, | |
896 | geneve->cfg.info.key.tp_dst, sport); | |
9b4437a5 | 897 | if (IS_ERR(rt)) |
898 | return PTR_ERR(rt); | |
371bd106 | 899 | |
c1a800e8 SB |
900 | err = skb_tunnel_check_pmtu(skb, &rt->dst, |
901 | GENEVE_IPV4_HLEN + info->options_len, | |
902 | netif_is_any_bridge_port(dev)); | |
903 | if (err < 0) { | |
904 | dst_release(&rt->dst); | |
905 | return err; | |
906 | } else if (err) { | |
907 | struct ip_tunnel_info *info; | |
908 | ||
909 | info = skb_tunnel_info(skb); | |
910 | if (info) { | |
911 | info->key.u.ipv4.dst = fl4.saddr; | |
912 | info->key.u.ipv4.src = fl4.daddr; | |
913 | } | |
914 | ||
915 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
916 | dst_release(&rt->dst); | |
917 | return -EINVAL; | |
918 | } | |
919 | ||
920 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
921 | netif_rx(skb); | |
922 | dst_release(&rt->dst); | |
923 | return -EMSGSIZE; | |
924 | } | |
52a589d5 | 925 | |
9e06e859 | 926 | if (geneve->cfg.collect_md) { |
9b4437a5 | 927 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); |
371bd106 | 928 | ttl = key->ttl; |
a025fb5f SB |
929 | |
930 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 931 | } else { |
9b4437a5 | 932 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
9e06e859 | 933 | if (geneve->cfg.ttl_inherit) |
52d0d404 HL |
934 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); |
935 | else | |
936 | ttl = key->ttl; | |
937 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
a025fb5f | 938 | |
9e06e859 | 939 | if (geneve->cfg.df == GENEVE_DF_SET) { |
a025fb5f | 940 | df = htons(IP_DF); |
9e06e859 | 941 | } else if (geneve->cfg.df == GENEVE_DF_INHERIT) { |
a025fb5f SB |
942 | struct ethhdr *eth = eth_hdr(skb); |
943 | ||
944 | if (ntohs(eth->h_proto) == ETH_P_IPV6) { | |
945 | df = htons(IP_DF); | |
946 | } else if (ntohs(eth->h_proto) == ETH_P_IP) { | |
947 | struct iphdr *iph = ip_hdr(skb); | |
948 | ||
949 | if (iph->frag_off & htons(IP_DF)) | |
950 | df = htons(IP_DF); | |
951 | } | |
952 | } | |
2d07dc79 | 953 | } |
2d07dc79 | 954 | |
c3ef5aa5 | 955 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 956 | if (unlikely(err)) |
957 | return err; | |
efeb2267 | 958 | |
9b4437a5 | 959 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
9e06e859 | 960 | tos, ttl, df, sport, geneve->cfg.info.key.tp_dst, |
9b4437a5 | 961 | !net_eq(geneve->net, dev_net(geneve->dev)), |
962 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
963 | return 0; | |
2d07dc79 JL |
964 | } |
965 | ||
8ed66f0e | 966 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 967 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 968 | struct geneve_dev *geneve, |
969 | const struct ip_tunnel_info *info) | |
8ed66f0e | 970 | { |
9b4437a5 | 971 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
972 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
973 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 974 | struct dst_entry *dst = NULL; |
8ed66f0e | 975 | struct flowi6 fl6; |
3a56f86f | 976 | __u8 prio, ttl; |
8ed66f0e | 977 | __be16 sport; |
bcceeec3 | 978 | int err; |
8ed66f0e | 979 | |
34beb215 MG |
980 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
981 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, | |
982 | geneve->cfg.info.key.tp_dst, sport); | |
9b4437a5 | 983 | if (IS_ERR(dst)) |
984 | return PTR_ERR(dst); | |
8ed66f0e | 985 | |
c1a800e8 SB |
986 | err = skb_tunnel_check_pmtu(skb, dst, |
987 | GENEVE_IPV6_HLEN + info->options_len, | |
988 | netif_is_any_bridge_port(dev)); | |
989 | if (err < 0) { | |
990 | dst_release(dst); | |
991 | return err; | |
992 | } else if (err) { | |
993 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
994 | ||
995 | if (info) { | |
996 | info->key.u.ipv6.dst = fl6.saddr; | |
997 | info->key.u.ipv6.src = fl6.daddr; | |
998 | } | |
999 | ||
1000 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
1001 | dst_release(dst); | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | ||
1005 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
1006 | netif_rx(skb); | |
1007 | dst_release(dst); | |
1008 | return -EMSGSIZE; | |
1009 | } | |
52a589d5 | 1010 | |
9e06e859 | 1011 | if (geneve->cfg.collect_md) { |
9b4437a5 | 1012 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); |
1013 | ttl = key->ttl; | |
1014 | } else { | |
1015 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
1016 | ip_hdr(skb), skb); | |
9e06e859 | 1017 | if (geneve->cfg.ttl_inherit) |
52d0d404 HL |
1018 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); |
1019 | else | |
1020 | ttl = key->ttl; | |
1021 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
9b4437a5 | 1022 | } |
31ac1c19 | 1023 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 1024 | if (unlikely(err)) |
1025 | return err; | |
8ed66f0e | 1026 | |
9b4437a5 | 1027 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
1028 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
9e06e859 | 1029 | info->key.label, sport, geneve->cfg.info.key.tp_dst, |
9b4437a5 | 1030 | !(info->key.tun_flags & TUNNEL_CSUM)); |
1031 | return 0; | |
1032 | } | |
1033 | #endif | |
8ed66f0e | 1034 | |
9b4437a5 | 1035 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
1036 | { | |
1037 | struct geneve_dev *geneve = netdev_priv(dev); | |
1038 | struct ip_tunnel_info *info = NULL; | |
1039 | int err; | |
abe492b4 | 1040 | |
9e06e859 | 1041 | if (geneve->cfg.collect_md) { |
9b4437a5 | 1042 | info = skb_tunnel_info(skb); |
1043 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
9b4437a5 | 1044 | netdev_dbg(dev, "no tunnel metadata\n"); |
9d149045 JB |
1045 | dev_kfree_skb(skb); |
1046 | dev->stats.tx_dropped++; | |
1047 | return NETDEV_TX_OK; | |
9b4437a5 | 1048 | } |
8ed66f0e | 1049 | } else { |
9e06e859 | 1050 | info = &geneve->cfg.info; |
8ed66f0e | 1051 | } |
8eb3b995 | 1052 | |
a717e3f7 | 1053 | rcu_read_lock(); |
9b4437a5 | 1054 | #if IS_ENABLED(CONFIG_IPV6) |
1055 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
1056 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
1057 | else | |
1058 | #endif | |
1059 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
a717e3f7 | 1060 | rcu_read_unlock(); |
8ed66f0e | 1061 | |
9b4437a5 | 1062 | if (likely(!err)) |
1063 | return NETDEV_TX_OK; | |
9d149045 | 1064 | |
c1a800e8 SB |
1065 | if (err != -EMSGSIZE) |
1066 | dev_kfree_skb(skb); | |
aed069df | 1067 | |
8ed66f0e JL |
1068 | if (err == -ELOOP) |
1069 | dev->stats.collisions++; | |
1070 | else if (err == -ENETUNREACH) | |
1071 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1072 | |
1073 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1074 | return NETDEV_TX_OK; |
1075 | } | |
8ed66f0e | 1076 | |
91572088 | 1077 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 1078 | { |
91572088 JW |
1079 | if (new_mtu > dev->max_mtu) |
1080 | new_mtu = dev->max_mtu; | |
321acc1c AK |
1081 | else if (new_mtu < dev->min_mtu) |
1082 | new_mtu = dev->min_mtu; | |
aeee0e66 | 1083 | |
55e5bfb5 DW |
1084 | dev->mtu = new_mtu; |
1085 | return 0; | |
1086 | } | |
1087 | ||
fc4099f1 PS |
1088 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1089 | { | |
1090 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1091 | struct geneve_dev *geneve = netdev_priv(dev); | |
34beb215 | 1092 | __be16 sport; |
fc4099f1 | 1093 | |
b8812fa8 | 1094 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 1095 | struct rtable *rt; |
1096 | struct flowi4 fl4; | |
34beb215 | 1097 | |
5b861f6b | 1098 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); |
34beb215 MG |
1099 | sport = udp_flow_src_port(geneve->net, skb, |
1100 | 1, USHRT_MAX, true); | |
9b4437a5 | 1101 | |
34beb215 MG |
1102 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, |
1103 | geneve->cfg.info.key.tp_dst, sport); | |
b8812fa8 JL |
1104 | if (IS_ERR(rt)) |
1105 | return PTR_ERR(rt); | |
fc4099f1 | 1106 | |
b8812fa8 JL |
1107 | ip_rt_put(rt); |
1108 | info->key.u.ipv4.src = fl4.saddr; | |
1109 | #if IS_ENABLED(CONFIG_IPV6) | |
1110 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 1111 | struct dst_entry *dst; |
1112 | struct flowi6 fl6; | |
34beb215 | 1113 | |
5b861f6b | 1114 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); |
34beb215 MG |
1115 | sport = udp_flow_src_port(geneve->net, skb, |
1116 | 1, USHRT_MAX, true); | |
9b4437a5 | 1117 | |
34beb215 MG |
1118 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, |
1119 | geneve->cfg.info.key.tp_dst, sport); | |
b8812fa8 JL |
1120 | if (IS_ERR(dst)) |
1121 | return PTR_ERR(dst); | |
1122 | ||
1123 | dst_release(dst); | |
1124 | info->key.u.ipv6.src = fl6.saddr; | |
1125 | #endif | |
1126 | } else { | |
1127 | return -EINVAL; | |
1128 | } | |
fc4099f1 | 1129 | |
34beb215 | 1130 | info->key.tp_src = sport; |
9e06e859 | 1131 | info->key.tp_dst = geneve->cfg.info.key.tp_dst; |
fc4099f1 PS |
1132 | return 0; |
1133 | } | |
1134 | ||
2d07dc79 JL |
1135 | static const struct net_device_ops geneve_netdev_ops = { |
1136 | .ndo_init = geneve_init, | |
1137 | .ndo_uninit = geneve_uninit, | |
1138 | .ndo_open = geneve_open, | |
1139 | .ndo_stop = geneve_stop, | |
1140 | .ndo_start_xmit = geneve_xmit, | |
b220a4a7 | 1141 | .ndo_get_stats64 = dev_get_tstats64, |
55e5bfb5 | 1142 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1143 | .ndo_validate_addr = eth_validate_addr, |
1144 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1145 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1146 | }; |
1147 | ||
1148 | static void geneve_get_drvinfo(struct net_device *dev, | |
1149 | struct ethtool_drvinfo *drvinfo) | |
1150 | { | |
1151 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1152 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1153 | } | |
1154 | ||
1155 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1156 | .get_drvinfo = geneve_get_drvinfo, | |
1157 | .get_link = ethtool_op_get_link, | |
1158 | }; | |
1159 | ||
1160 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1161 | static struct device_type geneve_type = { | |
1162 | .name = "geneve", | |
1163 | }; | |
1164 | ||
e5de25dc | 1165 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1166 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1167 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1168 | */ |
2d2b13fc | 1169 | static void geneve_offload_rx_ports(struct net_device *dev, bool push) |
05ca4029 SA |
1170 | { |
1171 | struct net *net = dev_net(dev); | |
1172 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1173 | struct geneve_sock *gs; | |
681e683f | 1174 | |
05ca4029 | 1175 | rcu_read_lock(); |
2d2b13fc SD |
1176 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { |
1177 | if (push) { | |
1178 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1179 | UDP_TUNNEL_TYPE_GENEVE); | |
1180 | } else { | |
1181 | udp_tunnel_drop_rx_port(dev, gs->sock, | |
1182 | UDP_TUNNEL_TYPE_GENEVE); | |
1183 | } | |
1184 | } | |
05ca4029 SA |
1185 | rcu_read_unlock(); |
1186 | } | |
05ca4029 | 1187 | |
2d07dc79 JL |
1188 | /* Initialize the device structure. */ |
1189 | static void geneve_setup(struct net_device *dev) | |
1190 | { | |
1191 | ether_setup(dev); | |
1192 | ||
1193 | dev->netdev_ops = &geneve_netdev_ops; | |
1194 | dev->ethtool_ops = &geneve_ethtool_ops; | |
cf124db5 | 1195 | dev->needs_free_netdev = true; |
2d07dc79 JL |
1196 | |
1197 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1198 | ||
2d07dc79 | 1199 | dev->features |= NETIF_F_LLTX; |
18423e1a | 1200 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST; |
2d07dc79 JL |
1201 | dev->features |= NETIF_F_RXCSUM; |
1202 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1203 | ||
18423e1a XL |
1204 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST; |
1205 | dev->hw_features |= NETIF_F_RXCSUM; | |
2d07dc79 | 1206 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
2d07dc79 | 1207 | |
91572088 JW |
1208 | /* MTU range: 68 - (something less than 65535) */ |
1209 | dev->min_mtu = ETH_MIN_MTU; | |
1210 | /* The max_mtu calculation does not take account of GENEVE | |
1211 | * options, to avoid excluding potentially valid | |
1212 | * configurations. This will be further reduced by IPvX hdr size. | |
1213 | */ | |
1214 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1215 | ||
2d07dc79 | 1216 | netif_keep_dst(dev); |
fc41cdb3 | 1217 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1218 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1219 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1220 | } |
1221 | ||
1222 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1223 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
c593642c | 1224 | [IFLA_GENEVE_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) }, |
8ed66f0e | 1225 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1226 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1227 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1228 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1229 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1230 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1231 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1232 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1233 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
52d0d404 | 1234 | [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 }, |
a025fb5f | 1235 | [IFLA_GENEVE_DF] = { .type = NLA_U8 }, |
2d07dc79 JL |
1236 | }; |
1237 | ||
a8b8a889 MS |
1238 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], |
1239 | struct netlink_ext_ack *extack) | |
2d07dc79 JL |
1240 | { |
1241 | if (tb[IFLA_ADDRESS]) { | |
c5ebc440 GM |
1242 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1243 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1244 | "Provided link layer address is not Ethernet"); | |
2d07dc79 | 1245 | return -EINVAL; |
c5ebc440 | 1246 | } |
2d07dc79 | 1247 | |
c5ebc440 GM |
1248 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
1249 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1250 | "Provided Ethernet address is not unicast"); | |
2d07dc79 | 1251 | return -EADDRNOTAVAIL; |
c5ebc440 | 1252 | } |
2d07dc79 JL |
1253 | } |
1254 | ||
c5ebc440 GM |
1255 | if (!data) { |
1256 | NL_SET_ERR_MSG(extack, | |
1257 | "Not enough attributes provided to perform the operation"); | |
2d07dc79 | 1258 | return -EINVAL; |
c5ebc440 | 1259 | } |
2d07dc79 JL |
1260 | |
1261 | if (data[IFLA_GENEVE_ID]) { | |
1262 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1263 | ||
c5ebc440 GM |
1264 | if (vni >= GENEVE_N_VID) { |
1265 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID], | |
1266 | "Geneve ID must be lower than 16777216"); | |
2d07dc79 | 1267 | return -ERANGE; |
c5ebc440 | 1268 | } |
2d07dc79 JL |
1269 | } |
1270 | ||
a025fb5f SB |
1271 | if (data[IFLA_GENEVE_DF]) { |
1272 | enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1273 | ||
1274 | if (df < 0 || df > GENEVE_DF_MAX) { | |
9a7b5b50 | 1275 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_DF], |
a025fb5f SB |
1276 | "Invalid DF attribute"); |
1277 | return -EINVAL; | |
1278 | } | |
1279 | } | |
1280 | ||
2d07dc79 JL |
1281 | return 0; |
1282 | } | |
1283 | ||
371bd106 | 1284 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1285 | const struct ip_tunnel_info *info, |
371bd106 PS |
1286 | bool *tun_on_same_port, |
1287 | bool *tun_collect_md) | |
1288 | { | |
9b4437a5 | 1289 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1290 | |
1291 | *tun_on_same_port = false; | |
1292 | *tun_collect_md = false; | |
371bd106 | 1293 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9e06e859 SD |
1294 | if (info->key.tp_dst == geneve->cfg.info.key.tp_dst) { |
1295 | *tun_collect_md = geneve->cfg.collect_md; | |
371bd106 PS |
1296 | *tun_on_same_port = true; |
1297 | } | |
9e06e859 SD |
1298 | if (info->key.tun_id == geneve->cfg.info.key.tun_id && |
1299 | info->key.tp_dst == geneve->cfg.info.key.tp_dst && | |
1300 | !memcmp(&info->key.u, &geneve->cfg.info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1301 | t = geneve; |
1302 | } | |
1303 | return t; | |
1304 | } | |
1305 | ||
9b4437a5 | 1306 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) |
1307 | { | |
3fa5f11d SB |
1308 | return !(info->key.tun_id || info->key.tun_flags || info->key.tos || |
1309 | info->key.ttl || info->key.label || info->key.tp_src || | |
1310 | memchr_inv(&info->key.u, 0, sizeof(info->key.u))); | |
9b4437a5 | 1311 | } |
1312 | ||
5b861f6b GM |
1313 | static bool geneve_dst_addr_equal(struct ip_tunnel_info *a, |
1314 | struct ip_tunnel_info *b) | |
1315 | { | |
1316 | if (ip_tunnel_info_af(a) == AF_INET) | |
1317 | return a->key.u.ipv4.dst == b->key.u.ipv4.dst; | |
1318 | else | |
1319 | return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst); | |
1320 | } | |
1321 | ||
e305ac6c | 1322 | static int geneve_configure(struct net *net, struct net_device *dev, |
c5ebc440 | 1323 | struct netlink_ext_ack *extack, |
9e06e859 | 1324 | const struct geneve_config *cfg) |
2d07dc79 JL |
1325 | { |
1326 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 | 1327 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
9e06e859 | 1328 | const struct ip_tunnel_info *info = &cfg->info; |
371bd106 | 1329 | bool tun_collect_md, tun_on_same_port; |
184fc8b5 | 1330 | int err, encap_len; |
2d07dc79 | 1331 | |
9e06e859 | 1332 | if (cfg->collect_md && !is_tnl_info_zero(info)) { |
c5ebc440 GM |
1333 | NL_SET_ERR_MSG(extack, |
1334 | "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified"); | |
8ed66f0e | 1335 | return -EINVAL; |
c5ebc440 | 1336 | } |
2d07dc79 JL |
1337 | |
1338 | geneve->net = net; | |
1339 | geneve->dev = dev; | |
1340 | ||
9b4437a5 | 1341 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1342 | if (t) |
1343 | return -EBUSY; | |
1344 | ||
184fc8b5 PA |
1345 | /* make enough headroom for basic scenario */ |
1346 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9e06e859 | 1347 | if (!cfg->collect_md && ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1348 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1349 | dev->max_mtu -= sizeof(struct iphdr); |
1350 | } else { | |
184fc8b5 | 1351 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1352 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1353 | } | |
184fc8b5 PA |
1354 | dev->needed_headroom = encap_len + ETH_HLEN; |
1355 | ||
9e06e859 | 1356 | if (cfg->collect_md) { |
c5ebc440 GM |
1357 | if (tun_on_same_port) { |
1358 | NL_SET_ERR_MSG(extack, | |
1359 | "There can be only one externally controlled device on a destination port"); | |
371bd106 | 1360 | return -EPERM; |
c5ebc440 | 1361 | } |
371bd106 | 1362 | } else { |
c5ebc440 GM |
1363 | if (tun_collect_md) { |
1364 | NL_SET_ERR_MSG(extack, | |
1365 | "There already exists an externally controlled device on this destination port"); | |
371bd106 | 1366 | return -EPERM; |
c5ebc440 | 1367 | } |
371bd106 PS |
1368 | } |
1369 | ||
9e06e859 SD |
1370 | dst_cache_reset(&geneve->cfg.info.dst_cache); |
1371 | memcpy(&geneve->cfg, cfg, sizeof(*cfg)); | |
468dfffc | 1372 | |
2d07dc79 JL |
1373 | err = register_netdevice(dev); |
1374 | if (err) | |
1375 | return err; | |
1376 | ||
e305ac6c | 1377 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1378 | return 0; |
1379 | } | |
1380 | ||
9b4437a5 | 1381 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1382 | { | |
1383 | memset(info, 0, sizeof(*info)); | |
1384 | info->key.tp_dst = htons(dst_port); | |
1385 | } | |
1386 | ||
c5ebc440 GM |
1387 | static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[], |
1388 | struct netlink_ext_ack *extack, | |
9e06e859 | 1389 | struct geneve_config *cfg, bool changelink) |
e305ac6c | 1390 | { |
9e06e859 | 1391 | struct ip_tunnel_info *info = &cfg->info; |
c5ebc440 GM |
1392 | int attrtype; |
1393 | ||
1394 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) { | |
1395 | NL_SET_ERR_MSG(extack, | |
1396 | "Cannot specify both IPv4 and IPv6 Remote addresses"); | |
8ed66f0e | 1397 | return -EINVAL; |
c5ebc440 | 1398 | } |
8ed66f0e JL |
1399 | |
1400 | if (data[IFLA_GENEVE_REMOTE]) { | |
c5ebc440 GM |
1401 | if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) { |
1402 | attrtype = IFLA_GENEVE_REMOTE; | |
1403 | goto change_notsup; | |
1404 | } | |
5b861f6b GM |
1405 | |
1406 | info->key.u.ipv4.dst = | |
8ed66f0e | 1407 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1408 | |
842841ec | 1409 | if (ipv4_is_multicast(info->key.u.ipv4.dst)) { |
c5ebc440 GM |
1410 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE], |
1411 | "Remote IPv4 address cannot be Multicast"); | |
9b4437a5 | 1412 | return -EINVAL; |
1413 | } | |
8ed66f0e JL |
1414 | } |
1415 | ||
1416 | if (data[IFLA_GENEVE_REMOTE6]) { | |
4c52a889 | 1417 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1418 | if (changelink && (ip_tunnel_info_af(info) == AF_INET)) { |
1419 | attrtype = IFLA_GENEVE_REMOTE6; | |
1420 | goto change_notsup; | |
1421 | } | |
5b861f6b GM |
1422 | |
1423 | info->mode = IP_TUNNEL_INFO_IPV6; | |
1424 | info->key.u.ipv6.dst = | |
8ed66f0e JL |
1425 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1426 | ||
5b861f6b | 1427 | if (ipv6_addr_type(&info->key.u.ipv6.dst) & |
8ed66f0e | 1428 | IPV6_ADDR_LINKLOCAL) { |
c5ebc440 GM |
1429 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1430 | "Remote IPv6 address cannot be link-local"); | |
8ed66f0e JL |
1431 | return -EINVAL; |
1432 | } | |
5b861f6b | 1433 | if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) { |
c5ebc440 GM |
1434 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1435 | "Remote IPv6 address cannot be Multicast"); | |
9b4437a5 | 1436 | return -EINVAL; |
1437 | } | |
5b861f6b | 1438 | info->key.tun_flags |= TUNNEL_CSUM; |
9e06e859 | 1439 | cfg->use_udp6_rx_checksums = true; |
9b4437a5 | 1440 | #else |
c5ebc440 GM |
1441 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1442 | "IPv6 support not enabled in the kernel"); | |
9b4437a5 | 1443 | return -EPFNOSUPPORT; |
1444 | #endif | |
8ed66f0e JL |
1445 | } |
1446 | ||
9b4437a5 | 1447 | if (data[IFLA_GENEVE_ID]) { |
1448 | __u32 vni; | |
1449 | __u8 tvni[3]; | |
5b861f6b | 1450 | __be64 tunid; |
9b4437a5 | 1451 | |
e277de5f | 1452 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1453 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1454 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1455 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1456 | |
5b861f6b | 1457 | tunid = vni_to_tunnel_id(tvni); |
c5ebc440 GM |
1458 | if (changelink && (tunid != info->key.tun_id)) { |
1459 | attrtype = IFLA_GENEVE_ID; | |
1460 | goto change_notsup; | |
1461 | } | |
5b861f6b | 1462 | info->key.tun_id = tunid; |
9b4437a5 | 1463 | } |
5b861f6b | 1464 | |
a97d97ba HL |
1465 | if (data[IFLA_GENEVE_TTL_INHERIT]) { |
1466 | if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT])) | |
9e06e859 | 1467 | cfg->ttl_inherit = true; |
a97d97ba | 1468 | else |
9e06e859 | 1469 | cfg->ttl_inherit = false; |
a97d97ba | 1470 | } else if (data[IFLA_GENEVE_TTL]) { |
5b861f6b | 1471 | info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
9e06e859 | 1472 | cfg->ttl_inherit = false; |
a97d97ba | 1473 | } |
52d0d404 | 1474 | |
d8951125 | 1475 | if (data[IFLA_GENEVE_TOS]) |
5b861f6b | 1476 | info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1477 | |
a025fb5f | 1478 | if (data[IFLA_GENEVE_DF]) |
9e06e859 | 1479 | cfg->df = nla_get_u8(data[IFLA_GENEVE_DF]); |
a025fb5f | 1480 | |
9b4437a5 | 1481 | if (data[IFLA_GENEVE_LABEL]) { |
5b861f6b | 1482 | info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & |
9b4437a5 | 1483 | IPV6_FLOWLABEL_MASK; |
c5ebc440 GM |
1484 | if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) { |
1485 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL], | |
1486 | "Label attribute only applies for IPv6 Geneve devices"); | |
9b4437a5 | 1487 | return -EINVAL; |
c5ebc440 | 1488 | } |
9b4437a5 | 1489 | } |
8eb3b995 | 1490 | |
5b861f6b | 1491 | if (data[IFLA_GENEVE_PORT]) { |
c5ebc440 GM |
1492 | if (changelink) { |
1493 | attrtype = IFLA_GENEVE_PORT; | |
1494 | goto change_notsup; | |
1495 | } | |
5b861f6b GM |
1496 | info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
1497 | } | |
2d07dc79 | 1498 | |
5b861f6b | 1499 | if (data[IFLA_GENEVE_COLLECT_METADATA]) { |
c5ebc440 GM |
1500 | if (changelink) { |
1501 | attrtype = IFLA_GENEVE_COLLECT_METADATA; | |
1502 | goto change_notsup; | |
1503 | } | |
9e06e859 | 1504 | cfg->collect_md = true; |
5b861f6b | 1505 | } |
2d07dc79 | 1506 | |
5b861f6b | 1507 | if (data[IFLA_GENEVE_UDP_CSUM]) { |
c5ebc440 GM |
1508 | if (changelink) { |
1509 | attrtype = IFLA_GENEVE_UDP_CSUM; | |
1510 | goto change_notsup; | |
1511 | } | |
5b861f6b GM |
1512 | if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1513 | info->key.tun_flags |= TUNNEL_CSUM; | |
1514 | } | |
abe492b4 | 1515 | |
5b861f6b | 1516 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { |
f9094b76 | 1517 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1518 | if (changelink) { |
1519 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX; | |
1520 | goto change_notsup; | |
1521 | } | |
5b861f6b GM |
1522 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) |
1523 | info->key.tun_flags &= ~TUNNEL_CSUM; | |
f9094b76 HL |
1524 | #else |
1525 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX], | |
1526 | "IPv6 support not enabled in the kernel"); | |
1527 | return -EPFNOSUPPORT; | |
1528 | #endif | |
5b861f6b | 1529 | } |
abe492b4 | 1530 | |
5b861f6b | 1531 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { |
f9094b76 | 1532 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1533 | if (changelink) { |
1534 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX; | |
1535 | goto change_notsup; | |
1536 | } | |
5b861f6b | 1537 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) |
9e06e859 | 1538 | cfg->use_udp6_rx_checksums = false; |
f9094b76 HL |
1539 | #else |
1540 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX], | |
1541 | "IPv6 support not enabled in the kernel"); | |
1542 | return -EPFNOSUPPORT; | |
1543 | #endif | |
5b861f6b GM |
1544 | } |
1545 | ||
1546 | return 0; | |
c5ebc440 GM |
1547 | change_notsup: |
1548 | NL_SET_ERR_MSG_ATTR(extack, data[attrtype], | |
1549 | "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported"); | |
1550 | return -EOPNOTSUPP; | |
5b861f6b GM |
1551 | } |
1552 | ||
c40e89fd AK |
1553 | static void geneve_link_config(struct net_device *dev, |
1554 | struct ip_tunnel_info *info, struct nlattr *tb[]) | |
1555 | { | |
1556 | struct geneve_dev *geneve = netdev_priv(dev); | |
1557 | int ldev_mtu = 0; | |
1558 | ||
1559 | if (tb[IFLA_MTU]) { | |
1560 | geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1561 | return; | |
1562 | } | |
1563 | ||
1564 | switch (ip_tunnel_info_af(info)) { | |
1565 | case AF_INET: { | |
1566 | struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst }; | |
1567 | struct rtable *rt = ip_route_output_key(geneve->net, &fl4); | |
1568 | ||
1569 | if (!IS_ERR(rt) && rt->dst.dev) { | |
1570 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN; | |
1571 | ip_rt_put(rt); | |
1572 | } | |
1573 | break; | |
1574 | } | |
1575 | #if IS_ENABLED(CONFIG_IPV6) | |
1576 | case AF_INET6: { | |
c0a47e44 HL |
1577 | struct rt6_info *rt; |
1578 | ||
1579 | if (!__in6_dev_get(dev)) | |
1580 | break; | |
1581 | ||
1582 | rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0, | |
1583 | NULL, 0); | |
c40e89fd AK |
1584 | |
1585 | if (rt && rt->dst.dev) | |
1586 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN; | |
1587 | ip6_rt_put(rt); | |
1588 | break; | |
1589 | } | |
1590 | #endif | |
1591 | } | |
1592 | ||
1593 | if (ldev_mtu <= 0) | |
1594 | return; | |
1595 | ||
1596 | geneve_change_mtu(dev, ldev_mtu - info->options_len); | |
1597 | } | |
1598 | ||
5b861f6b GM |
1599 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1600 | struct nlattr *tb[], struct nlattr *data[], | |
1601 | struct netlink_ext_ack *extack) | |
1602 | { | |
9e06e859 SD |
1603 | struct geneve_config cfg = { |
1604 | .df = GENEVE_DF_UNSET, | |
1605 | .use_udp6_rx_checksums = false, | |
1606 | .ttl_inherit = false, | |
1607 | .collect_md = false, | |
1608 | }; | |
5b861f6b GM |
1609 | int err; |
1610 | ||
9e06e859 SD |
1611 | init_tnl_info(&cfg.info, GENEVE_UDP_PORT); |
1612 | err = geneve_nl2info(tb, data, extack, &cfg, false); | |
5b861f6b GM |
1613 | if (err) |
1614 | return err; | |
abe492b4 | 1615 | |
9e06e859 | 1616 | err = geneve_configure(net, dev, extack, &cfg); |
c40e89fd AK |
1617 | if (err) |
1618 | return err; | |
1619 | ||
9e06e859 | 1620 | geneve_link_config(dev, &cfg.info, tb); |
c40e89fd AK |
1621 | |
1622 | return 0; | |
2d07dc79 JL |
1623 | } |
1624 | ||
5b861f6b GM |
1625 | /* Quiesces the geneve device data path for both TX and RX. |
1626 | * | |
1627 | * On transmit geneve checks for non-NULL geneve_sock before it proceeds. | |
1628 | * So, if we set that socket to NULL under RCU and wait for synchronize_net() | |
1629 | * to complete for the existing set of in-flight packets to be transmitted, | |
1630 | * then we would have quiesced the transmit data path. All the future packets | |
1631 | * will get dropped until we unquiesce the data path. | |
1632 | * | |
1633 | * On receive geneve dereference the geneve_sock stashed in the socket. So, | |
1634 | * if we set that to NULL under RCU and wait for synchronize_net() to | |
1635 | * complete, then we would have quiesced the receive data path. | |
1636 | */ | |
1637 | static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4, | |
1638 | struct geneve_sock **gs6) | |
1639 | { | |
1640 | *gs4 = rtnl_dereference(geneve->sock4); | |
1641 | rcu_assign_pointer(geneve->sock4, NULL); | |
1642 | if (*gs4) | |
1643 | rcu_assign_sk_user_data((*gs4)->sock->sk, NULL); | |
1644 | #if IS_ENABLED(CONFIG_IPV6) | |
1645 | *gs6 = rtnl_dereference(geneve->sock6); | |
1646 | rcu_assign_pointer(geneve->sock6, NULL); | |
1647 | if (*gs6) | |
1648 | rcu_assign_sk_user_data((*gs6)->sock->sk, NULL); | |
1649 | #else | |
1650 | *gs6 = NULL; | |
1651 | #endif | |
1652 | synchronize_net(); | |
1653 | } | |
1654 | ||
1655 | /* Resumes the geneve device data path for both TX and RX. */ | |
1656 | static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4, | |
1657 | struct geneve_sock __maybe_unused *gs6) | |
1658 | { | |
1659 | rcu_assign_pointer(geneve->sock4, gs4); | |
1660 | if (gs4) | |
1661 | rcu_assign_sk_user_data(gs4->sock->sk, gs4); | |
1662 | #if IS_ENABLED(CONFIG_IPV6) | |
1663 | rcu_assign_pointer(geneve->sock6, gs6); | |
1664 | if (gs6) | |
1665 | rcu_assign_sk_user_data(gs6->sock->sk, gs6); | |
1666 | #endif | |
1667 | synchronize_net(); | |
1668 | } | |
1669 | ||
1670 | static int geneve_changelink(struct net_device *dev, struct nlattr *tb[], | |
1671 | struct nlattr *data[], | |
1672 | struct netlink_ext_ack *extack) | |
1673 | { | |
1674 | struct geneve_dev *geneve = netdev_priv(dev); | |
1675 | struct geneve_sock *gs4, *gs6; | |
9e06e859 | 1676 | struct geneve_config cfg; |
5b861f6b GM |
1677 | int err; |
1678 | ||
1679 | /* If the geneve device is configured for metadata (or externally | |
1680 | * controlled, for example, OVS), then nothing can be changed. | |
1681 | */ | |
9e06e859 | 1682 | if (geneve->cfg.collect_md) |
5b861f6b GM |
1683 | return -EOPNOTSUPP; |
1684 | ||
1685 | /* Start with the existing info. */ | |
9e06e859 SD |
1686 | memcpy(&cfg, &geneve->cfg, sizeof(cfg)); |
1687 | err = geneve_nl2info(tb, data, extack, &cfg, true); | |
5b861f6b GM |
1688 | if (err) |
1689 | return err; | |
1690 | ||
9e06e859 SD |
1691 | if (!geneve_dst_addr_equal(&geneve->cfg.info, &cfg.info)) { |
1692 | dst_cache_reset(&cfg.info.dst_cache); | |
1693 | geneve_link_config(dev, &cfg.info, tb); | |
c40e89fd | 1694 | } |
5b861f6b GM |
1695 | |
1696 | geneve_quiesce(geneve, &gs4, &gs6); | |
9e06e859 | 1697 | memcpy(&geneve->cfg, &cfg, sizeof(cfg)); |
5b861f6b GM |
1698 | geneve_unquiesce(geneve, gs4, gs6); |
1699 | ||
1700 | return 0; | |
1701 | } | |
1702 | ||
2d07dc79 JL |
1703 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
1704 | { | |
1705 | struct geneve_dev *geneve = netdev_priv(dev); | |
1706 | ||
2d07dc79 JL |
1707 | list_del(&geneve->next); |
1708 | unregister_netdevice_queue(dev, head); | |
1709 | } | |
1710 | ||
1711 | static size_t geneve_get_size(const struct net_device *dev) | |
1712 | { | |
1713 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1714 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1715 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1716 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
a025fb5f | 1717 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */ |
8eb3b995 | 1718 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1719 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1720 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1721 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1722 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1723 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
52d0d404 | 1724 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ |
2d07dc79 JL |
1725 | 0; |
1726 | } | |
1727 | ||
1728 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1729 | { | |
1730 | struct geneve_dev *geneve = netdev_priv(dev); | |
9e06e859 SD |
1731 | struct ip_tunnel_info *info = &geneve->cfg.info; |
1732 | bool ttl_inherit = geneve->cfg.ttl_inherit; | |
1733 | bool metadata = geneve->cfg.collect_md; | |
9b4437a5 | 1734 | __u8 tmp_vni[3]; |
2d07dc79 JL |
1735 | __u32 vni; |
1736 | ||
9b4437a5 | 1737 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1738 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1739 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1740 | goto nla_put_failure; | |
1741 | ||
fd7eafd0 | 1742 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1743 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1744 | info->key.u.ipv4.dst)) |
1745 | goto nla_put_failure; | |
9b4437a5 | 1746 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1747 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1748 | goto nla_put_failure; |
9b4437a5 | 1749 | |
8ed66f0e | 1750 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1751 | } else if (!metadata) { |
8ed66f0e | 1752 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, |
9b4437a5 | 1753 | &info->key.u.ipv6.dst)) |
1754 | goto nla_put_failure; | |
9b4437a5 | 1755 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1756 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1757 | goto nla_put_failure; | |
11387fe4 | 1758 | #endif |
fd7eafd0 | 1759 | } |
2d07dc79 | 1760 | |
9b4437a5 | 1761 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1762 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1763 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1764 | goto nla_put_failure; |
1765 | ||
9e06e859 | 1766 | if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->cfg.df)) |
a025fb5f SB |
1767 | goto nla_put_failure; |
1768 | ||
9b4437a5 | 1769 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1770 | goto nla_put_failure; |
1771 | ||
fd7eafd0 | 1772 | if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
f9094b76 | 1773 | goto nla_put_failure; |
fd7eafd0 | 1774 | |
f9094b76 | 1775 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1776 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, |
9e06e859 | 1777 | !geneve->cfg.use_udp6_rx_checksums)) |
fd7eafd0 | 1778 | goto nla_put_failure; |
f9094b76 | 1779 | #endif |
fd7eafd0 | 1780 | |
52d0d404 HL |
1781 | if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) |
1782 | goto nla_put_failure; | |
1783 | ||
2d07dc79 JL |
1784 | return 0; |
1785 | ||
1786 | nla_put_failure: | |
1787 | return -EMSGSIZE; | |
1788 | } | |
1789 | ||
1790 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1791 | .kind = "geneve", | |
1792 | .maxtype = IFLA_GENEVE_MAX, | |
1793 | .policy = geneve_policy, | |
1794 | .priv_size = sizeof(struct geneve_dev), | |
1795 | .setup = geneve_setup, | |
1796 | .validate = geneve_validate, | |
1797 | .newlink = geneve_newlink, | |
5b861f6b | 1798 | .changelink = geneve_changelink, |
2d07dc79 JL |
1799 | .dellink = geneve_dellink, |
1800 | .get_size = geneve_get_size, | |
1801 | .fill_info = geneve_fill_info, | |
1802 | }; | |
1803 | ||
e305ac6c PS |
1804 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1805 | u8 name_assign_type, u16 dst_port) | |
1806 | { | |
1807 | struct nlattr *tb[IFLA_MAX + 1]; | |
1808 | struct net_device *dev; | |
106da663 | 1809 | LIST_HEAD(list_kill); |
e305ac6c | 1810 | int err; |
9e06e859 SD |
1811 | struct geneve_config cfg = { |
1812 | .df = GENEVE_DF_UNSET, | |
1813 | .use_udp6_rx_checksums = true, | |
1814 | .ttl_inherit = false, | |
1815 | .collect_md = true, | |
1816 | }; | |
e305ac6c PS |
1817 | |
1818 | memset(tb, 0, sizeof(tb)); | |
1819 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 1820 | &geneve_link_ops, tb, NULL); |
e305ac6c PS |
1821 | if (IS_ERR(dev)) |
1822 | return dev; | |
1823 | ||
9e06e859 SD |
1824 | init_tnl_info(&cfg.info, dst_port); |
1825 | err = geneve_configure(net, dev, NULL, &cfg); | |
106da663 ND |
1826 | if (err) { |
1827 | free_netdev(dev); | |
1828 | return ERR_PTR(err); | |
1829 | } | |
7e059158 DW |
1830 | |
1831 | /* openvswitch users expect packet sizes to be unrestricted, | |
1832 | * so set the largest MTU we can. | |
1833 | */ | |
91572088 | 1834 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1835 | if (err) |
1836 | goto err; | |
1837 | ||
41009481 ND |
1838 | err = rtnl_configure_link(dev, NULL); |
1839 | if (err < 0) | |
1840 | goto err; | |
1841 | ||
e305ac6c | 1842 | return dev; |
9b4437a5 | 1843 | err: |
106da663 ND |
1844 | geneve_dellink(dev, &list_kill); |
1845 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1846 | return ERR_PTR(err); |
e305ac6c PS |
1847 | } |
1848 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1849 | ||
681e683f HFS |
1850 | static int geneve_netdevice_event(struct notifier_block *unused, |
1851 | unsigned long event, void *ptr) | |
1852 | { | |
1853 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1854 | ||
dedc33e7 JK |
1855 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
1856 | geneve_offload_rx_ports(dev, true); | |
1857 | else if (event == NETDEV_UDP_TUNNEL_DROP_INFO) | |
1858 | geneve_offload_rx_ports(dev, false); | |
681e683f HFS |
1859 | |
1860 | return NOTIFY_DONE; | |
1861 | } | |
1862 | ||
1863 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1864 | .notifier_call = geneve_netdevice_event, | |
1865 | }; | |
1866 | ||
2d07dc79 JL |
1867 | static __net_init int geneve_init_net(struct net *net) |
1868 | { | |
1869 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1870 | |
1871 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1872 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1873 | return 0; |
1874 | } | |
1875 | ||
2843a253 | 1876 | static void geneve_destroy_tunnels(struct net *net, struct list_head *head) |
2d07dc79 JL |
1877 | { |
1878 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1879 | struct geneve_dev *geneve, *next; | |
1880 | struct net_device *dev, *aux; | |
2d07dc79 JL |
1881 | |
1882 | /* gather any geneve devices that were moved into this ns */ | |
1883 | for_each_netdev_safe(net, dev, aux) | |
1884 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
2843a253 | 1885 | unregister_netdevice_queue(dev, head); |
2d07dc79 JL |
1886 | |
1887 | /* now gather any other geneve devices that were created in this ns */ | |
1888 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1889 | /* If geneve->dev is in the same netns, it was already added | |
1890 | * to the list by the previous loop. | |
1891 | */ | |
1892 | if (!net_eq(dev_net(geneve->dev), net)) | |
2843a253 | 1893 | unregister_netdevice_queue(geneve->dev, head); |
2d07dc79 | 1894 | } |
2843a253 HY |
1895 | } |
1896 | ||
1897 | static void __net_exit geneve_exit_batch_net(struct list_head *net_list) | |
1898 | { | |
1899 | struct net *net; | |
1900 | LIST_HEAD(list); | |
1901 | ||
1902 | rtnl_lock(); | |
1903 | list_for_each_entry(net, net_list, exit_list) | |
1904 | geneve_destroy_tunnels(net, &list); | |
1905 | ||
2d07dc79 JL |
1906 | /* unregister the devices gathered above */ |
1907 | unregister_netdevice_many(&list); | |
1908 | rtnl_unlock(); | |
0fda7600 FW |
1909 | |
1910 | list_for_each_entry(net, net_list, exit_list) { | |
1911 | const struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1912 | ||
1913 | WARN_ON_ONCE(!list_empty(&gn->sock_list)); | |
1914 | } | |
2d07dc79 JL |
1915 | } |
1916 | ||
1917 | static struct pernet_operations geneve_net_ops = { | |
1918 | .init = geneve_init_net, | |
2843a253 | 1919 | .exit_batch = geneve_exit_batch_net, |
2d07dc79 JL |
1920 | .id = &geneve_net_id, |
1921 | .size = sizeof(struct geneve_net), | |
1922 | }; | |
1923 | ||
1924 | static int __init geneve_init_module(void) | |
1925 | { | |
1926 | int rc; | |
1927 | ||
1928 | rc = register_pernet_subsys(&geneve_net_ops); | |
1929 | if (rc) | |
1930 | goto out1; | |
1931 | ||
681e683f | 1932 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1933 | if (rc) |
1934 | goto out2; | |
1935 | ||
681e683f HFS |
1936 | rc = rtnl_link_register(&geneve_link_ops); |
1937 | if (rc) | |
1938 | goto out3; | |
1939 | ||
2d07dc79 | 1940 | return 0; |
681e683f HFS |
1941 | out3: |
1942 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1943 | out2: |
1944 | unregister_pernet_subsys(&geneve_net_ops); | |
1945 | out1: | |
1946 | return rc; | |
1947 | } | |
1948 | late_initcall(geneve_init_module); | |
1949 | ||
1950 | static void __exit geneve_cleanup_module(void) | |
1951 | { | |
1952 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1953 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1954 | unregister_pernet_subsys(&geneve_net_ops); |
1955 | } | |
1956 | module_exit(geneve_cleanup_module); | |
1957 | ||
1958 | MODULE_LICENSE("GPL"); | |
1959 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1960 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1961 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1962 | MODULE_ALIAS_RTNL_LINK("geneve"); |